Weight measurement device

Abstract

To provide a weight measurement device resistant to dust, with which a ton-order weight can be examined to check the weight of industrial waste.SOLUTION: A weight measurement device for measuring the weight of industrial waste comprises: a lower plate as a base to be set on the ground; an upper plate arranged above the lower plate to place the industrial waste on; an elastic body arranged between the lower plate and the upper plate, having impetus in the direction of separating the upper plate from the lower plate; a fluid-encapsulated container arranged on the lower plate, in which a fluid is encapsulated and having a visible part so as to be able to look into the amount of movement of the fluid; and a piston slidably arranged inside the fluid-encapsulated container, which moves the fluid inside the fluid-encapsulated container when the elastic body shrinks due to a load on the upper plate, whereby the upper plate moves toward the lower plate.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] FIELD OF THE INVENTION An embodiment of the present invention relates to a weight measuring device. [Background technology]

[0002] During the construction process, industrial waste such as wood scraps, paper scraps, iron scraps, concrete scraps, etc. must be disposed of in accordance with the ordinances, laws, etc. of each prefecture.

[0003] Generally, when a certain amount of this industrial waste accumulates, it is often loaded onto a truck and removed. For this reason, so-called industrial waste baskets (hereafter referred to as "industrial waste baskets"), which are garbage bins for temporarily storing this industrial waste, are installed at construction sites. During the construction period, industrial waste baskets are installed in designated locations on the construction site, and industrial waste is accumulated there. Furthermore, multiple industrial waste baskets are often installed next to each other, such as along the walls of the work site, so as not to interfere with on-site work.

[0004] Industrial waste baskets are generally five-sided metal baskets, and bags made of synthetic fibers such as polyethylene or polypropylene with a load capacity of at least one ton (hereinafter referred to as ton bags) are placed inside the basket, and industrial waste is stuffed into the bags.

[0005] As mentioned above, once a certain amount of industrial waste has accumulated, it is removed by truck. This truck is allocated according to the weight of the industrial waste to be disposed of, but if the total weight of the waste is underestimated, it will be overloaded and the truck will have to be re-arranged. Conversely, if a truck with too large a load capacity is allocated, it will result in a large waste in terms of costs. Therefore, it is necessary to know the weight of the industrial waste to be disposed of, even if it is just a rough estimate as a guide to the truck's loading capacity, before arranging the truck. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-266587 [Patent Document 2] Japanese Patent Publication No. 53-93058 Summary of the Invention [Problem to be solved by the invention]

[0007] In the past, in order to know the weight of industrial waste to be disposed of before dispatching a truck, for example, if there was wood in an industrial waste basket, the approximate weight was calculated by adding up the volume and density of the wood, and then a truck was dispatched. This method is prone to large discrepancies between the actual weight and the calculated weight, and there is a high possibility of the above-mentioned incorrect truck dispatch occurring.

[0008] Here, the following measuring devices are available as devices for measuring weight.

[0009] (1) Patent Document 1: "Load Cell Platform Scale" Digital platform scales use a strain sensor called a load cell. When a load is applied to the top plate, the strain element of the load cell located below the top plate is distorted. The magnitude of the electrical signal output from the strain gauge of the load cell is proportional to the strain of the strain element, so the weight can be measured by analyzing the electrical signal.

[0010] (2) Patent Document 2: "Flat type weight scale" When a load is applied to the plate, the lever sinks, and with it the lever. When the lever sinks, the internal mechanism causes the rotating lever to rotate around the pivot, causing the pivot part at the end of the rotating lever to move left and right. When the pivot moves left and right, the rack also moves left and right, causing the gear to rotate. The weight is displayed by linking this gear with a disk that displays the weight.

[0011] The "load cell platform scale" in Patent Document 1 is unsuitable for use at construction sites because the load cells and electrical circuits that make up the device are vulnerable to the dust that often occurs at construction sites. As for the "flat-type weighing scale" in Patent Document 2, most common flat-type spring-type platform scales are designed to measure weights of several hundred kilograms and cannot withstand weights of over one ton.

[0012] Therefore, in order to confirm the weight of industrial waste, a weight measuring device that is resistant to dust and can confirm weight on the order of tons is required. [Means for solving the problem]

[0013] In order to solve the above problems, the weight measuring device of the embodiment is a weight measuring device that measures the weight of industrial waste, and includes a lower plate that serves as a base to be placed on the ground, an upper plate that is placed on top of the lower plate and on which industrial waste is placed, an elastic body that is placed between the lower plate and the upper plate and is biased in a direction that moves the upper plate away from the lower plate, a liquid-sealed container that is placed on the lower plate and has a visible portion that allows the amount of movement of the liquid to be visually observed, and a piston that is arranged to be slidable inside the liquid-sealed container, and when a load is applied to the upper plate, the elastic body contracts and the upper plate moves toward the lower plate, thereby moving the liquid inside the liquid-sealed container. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a schematic view of a weight measuring device according to a first embodiment when in use. [Figure 2] FIG. 1 is a top view of a weight measuring device according to a first embodiment. [Figure 3] FIG. 1 is a side view of a weight measuring device according to a first embodiment. [Figure 4] FIG. 1 is a cross-sectional side view of a liquid-sealed container according to a first embodiment. [Figure 5] FIG. 2 is a top view of a visible portion according to the first embodiment. [Figure 6] FIG. 4 is a top view of the visible part according to the first embodiment when a predetermined load is applied. [Figure 7] FIG. 10 is a top view of a visible portion according to a second embodiment. [Figure 8] FIG. 10 is a top view of the visible portion according to the second embodiment when a predetermined load is applied. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings.

[0016] (First embodiment) FIG. 1 shows a schematic diagram of the weight measuring device according to the first embodiment when in use, FIG. 2 shows a top view of the weight measuring device according to the first embodiment, FIG. 3 shows a side view of the weight measuring device according to the first embodiment, FIG. 4 shows a side cross-sectional view of the liquid-sealed container according to the first embodiment, and FIG. 5 shows a top cross-sectional view of the visible part according to the first embodiment. The weight measuring device according to the first embodiment will be described using FIGS. 1 to 5.

[0017] As shown in FIG. 1, a weight measuring device 10 according to this embodiment has a lower plate 12 that serves as the base of the weight measuring device 10, an upper plate 11 for placing industrial waste, including an industrial waste basket 14 (hereinafter referred to as the industrial waste basket 14), is provided above the lower plate 12, and a spring 13, which is an elastic body that is biased in a direction that moves the upper plate 11 away from the lower plate 12, is provided between the lower plate 12 and the upper plate 11. Furthermore, a liquid-sealed container 15 is provided on the upper surface of the lower plate 12. As shown in FIG. 2, the springs 13 are provided at each of the four corners of the upper plate 11, and the liquid-sealed container 15 is provided so that the piston 16 is positioned at the center of the upper plate 11. Note that a height adjuster or a mechanical jack may be provided below the lower plate 12 to adjust the height of the lower plate 12 and keep the weight measuring device level.

[0018] 4, the liquid-sealed container 15 is composed of a vertically arranged cylindrical portion 17, a horizontal portion 18, and a visible portion 19, and the insides of the cylindrical portion 17 and the horizontal portion 18 are filled with a liquid 20. The piston 16 closes the cylindrical portion 17 like a lid and is configured to slide against the inner surface of the cylindrical portion 17.

[0019] As shown in Figure 1, the upper plate 11 is a plate on which industrial waste, including industrial waste baskets 14, is placed. Generally, industrial waste is stored in industrial waste baskets 14, and when a certain amount is reached, it is transported by truck outside the construction site. Bags called ton bags (not shown) are often placed inside the industrial waste baskets 14, and when the industrial waste is transported, it is often discharged all at once in the ton bags.

[0020] Industrial waste is often stored in amounts exceeding one ton, and the ton bags are made of a material that can withstand such weights on the order of a ton. In addition, the upper plate 11 is made of a material that will not deform even when heavy objects on the order of a ton are placed on it, such as reinforced plastic, and is constructed to a considerable thickness.

[0021] In this embodiment, the shape of the upper plate 11 is rectangular, but it is not limited to a rectangular shape as long as industrial waste including the industrial waste basket 14 can be placed thereon.

[0022] The lower plate 12 is the base of the weight measuring device 10 according to this embodiment and is the plate that comes into contact with the ground. Like the upper plate 11, it is made of a material that can withstand weights on the order of tons. As shown in FIGS. 1 and 2, a liquid-sealed container 15, the details of which will be described later, is provided on the upper surface of the lower plate 12. The lower plate 12 has a larger area than the upper plate 11, and as shown in FIG. 2, the larger area of ​​the lower plate 12 means that there is a portion that does not overlap with the upper plate 11 and protrudes beyond the upper plate 11. This is because the visible portion 19 of the liquid-sealed container 15 is provided in the protruding portion, thereby improving the visibility of the visible portion 19 from above.

[0023] The spring 13 is a coil spring with a wire diameter thick enough to prevent plastic deformation even when a load of a weight on the order of tons is applied, but is not limited to a coil spring, and any other elastic body that does not plastically deform even when a load of a weight on the order of tons is applied may be used.

[0024] In this embodiment, four springs 13 are provided, one at each of the four corners of the upper plate 11. The number and arrangement of the springs 13 are not limited to this and can be changed as appropriate according to the weight of the industrial waste, the shape of the upper plate 11, etc.

[0025] As shown in Fig. 4, the liquid-sealed container 15 is composed of a cylindrical portion 17, a horizontal portion 18, and a visible portion 19, and is placed on the upper surface of the lower plate 12 as shown in Fig. 3. Also, as shown in Fig. 4, the liquid-sealed container 15 seals in a liquid 20 that moves in conjunction with the sliding of the piston 16. In this embodiment, the liquid 20 is water, but other liquids may be used, and it is preferable that the liquid be a non-shrinkable liquid such as water or oil.

[0026] 4, the piston 16 serves as a lid to seal in the liquid 20 inside the liquid-sealed container 15, and is installed so as to be able to slide on the inside of the cylindrical portion 17. The sliding surface has a seal structure so that the liquid 20 does not leak out.

[0027] The cylindrical portion 17 and the horizontal portion 18 are integrated to form the main body of the liquid-sealed container 15, and serve to hold the liquid 20. The horizontal portion 18 has a smaller cross-sectional area than the cylindrical portion 17. Details will be described later, but in this embodiment, the cross-sectional area of ​​the cylindrical portion 17 is 100 cm 2 In contrast, the horizontal part 18 is 1 cm 2 Although the cross-sectional areas of the cylindrical portion 17 and the horizontal portion 18 are not limited to these, it is desirable that the cross-sectional area of ​​the cylindrical portion 17 be larger than the cross-sectional areas of the horizontal portion 18 and the visible portion 19 in order to amplify the amount of movement of the liquid 20 in the cylindrical portion 17 in the horizontal portion 18 and the visible portion 19.

[0028] As shown in FIG. 5 , the visible portion 19 is located near the end of the liquid-sealed container 15 opposite the piston 16, and includes a partition plate 21, a visible portion spring 22, a guide line 23, and an end portion 24. In this embodiment, the visible portion 19 is made of glass, but any other transparent material that allows the interior to be visually observed may be used. The visible portion 19 is equipped with a partition plate 21 that can move within the liquid. The partition plate 21 is in contact with the liquid 20, and the visible portion spring 22 is installed on its opposite surface. One end of the visible portion spring 22, which is a visible portion elastic body, is installed in contact with the partition plate 21, and the other end is installed in contact with the end portion 24. The end portion 24 is provided with three first small holes 25 that discharge air from the interior as the partition plate 21 moves, so that the space from the end portion 24 to the partition plate 21 is always maintained at atmospheric pressure. In this embodiment, three first small holes 25 are provided at the end 24, but the number of first small holes 25 is not limited to three, and other structures may be used as long as the space from the end 24 to the partition plate 21 is always kept at atmospheric pressure.

[0029] Furthermore, a guide line 23 is provided in the visible portion 19 so that it can be visually confirmed that the weight of the industrial waste has reached a set weight. The guide line 23 is provided at a position where the liquid 20 is predicted to move relative to a predetermined weight of industrial waste, based on calculations to be described later.

[0030] The weight measurement method will now be described with reference to Figures 1, 3, and 6. As shown in Figure 1, an industrial waste basket 14 is placed on the top surface of the upper plate 11. When industrial waste is placed on the industrial waste basket 14, the spring 13 contracts, causing the upper plate 11 to move downward toward the lower plate 12. As shown in Figure 3, a gap is provided between the piston 16 and the underside of the upper plate 11. As the weight of the industrial waste increases, this gap gradually becomes smaller, and eventually the upper plate 11 and the piston 16 come into contact. As the weight of the industrial waste further increases, the upper plate 11 presses the piston 16 further downward toward the lower plate 12. As shown in Figure 4, the liquid-sealed container 15 is filled with liquid 20, so the piston 16 moves the partition plate 21 toward the end 24 via the liquid 20. As shown in Figure 5, when no industrial waste is placed on the partition plate 21, the partition plate 21 is separated from the guide line 23. When the load of industrial waste increases, as shown in Figure 6, the visible spring 22 contracts and the partition plate 21 approaches the guide line 23, allowing the user to recognize that the industrial waste is approaching the set weight.

[0031] An example of weight measurement will be described below using specific numerical values.

[0032] For example, the weight of industrial waste that can be loaded into the industrial waste basket 14 is assumed to be 1000 kg (measured weight set to 1000 kg). The weight of the industrial waste basket 14 is assumed to be 50 kg, and the weight of the ton bag is assumed to be small enough to be ignored compared to the weight of the industrial waste and the industrial waste basket 14. The upper plate 11 and lower plate 12 are reinforced plastic floor plates with a square shape of 1 m on each side and weighing 15 kg. The gap between the upper plate 11 and lower plate 12 is assumed to be 70 mm. The springs 13 have a free length of 70 mm, the same as the gap between the upper plate 11 and lower plate 12, a spring constant of 20 kgf / mm, and four of them are installed at the four corners of the upper plate 11. The liquid-sealed container 15 has an overall thickness of 57.8 mm, including the top of the piston 16, and the cross-sectional area of ​​the piston 16 is 100 cm. 2 The cross-sectional area of ​​the horizontal part 18 and the visible part 19 is 1 cm 2 Furthermore, the spring constant of the visible portion spring 22 is set to 0.98 kgf / mm.

[0033] When an industrial waste basket 14 is placed on the top surface of the upper plate 11, the load of the industrial waste basket 14 and the load of the upper plate 11 act on the four springs 13 in the direction (downward) of the lower plate 12. Next, assume that industrial waste is stuffed into the ton bags in the industrial waste basket 14 until the weight of the industrial waste reaches 900 kg.

[0034] At this time, the forces acting on the four springs 13 are as follows: (Weight of industrial waste) + (Weight of industrial waste basket 14) + (Weight of upper plate 11) = 900(kgf) + 50(kgf) + 15(kgf) = 975(kgf) This becomes:

[0035] The amount of contraction of each spring 13 is (Load on one of springs 13) ÷ (Spring constant of spring 13) = 975 (kgf) ÷ 4 ÷ 20 (kgf / mm) ≒ 12.2 (mm) This becomes:

[0036] At this time, the gap between the upper plate 11 and the lower plate 12 is 70(mm) - 12.2(mm) = 57.8(mm) This becomes:

[0037] Since the height of the liquid-sealed container 15 (height of the upper surface of the piston 16) is 57.8 (mm), the upper plate 11 comes into contact with the piston 16 at this point (when 900 kg of industrial waste has been packed).

[0038] If the weight of the industrial waste increases further and the contraction of each spring 13 becomes 12.7 mm, the weight of the industrial waste will be (Elastic force of spring 13) + (Elastic force of visible spring 22) - (Load of upper plate 11) - (Load of industrial waste basket 14) =20(kgf / mm)×12.7(mm)×4+X(kgf)-50(kgf)-15(kgf) =951(kgf)+X(kgf) This becomes:

[0039] The amount of liquid 20 that moves to the visible portion 19 is 100(cm 2 )×0.5(mm)=5(cm 3 ) is.

[0040] The cross-sectional area of ​​the horizontal part 18 and the visible part 19 is 1 cm 2 Therefore, the liquid 20 moves 5 cm through the horizontal portion 18 and the visible portion 19.

[0041] Here, since the spring constant of the visible portion spring 22 is 0.98 kgf / mm, the elastic force X of the visible portion spring 22 is X = 0.98 (kgf / mm) x 5 (cm) = 49 (kgf) This becomes:

[0042] Therefore, the weight of industrial waste is: 951(kgf)+X(kgf)=951(kgf)+49(kgf) =1000(kgf) This becomes:

[0043] As described above, by providing the reference line 23 at the position of the movement amount (5 cm) of the liquid 20 when the industrial waste becomes 1000 kg, it becomes possible to measure the weight.

[0044] When the industrial waste is removed from the industrial waste basket 14, the elastic force of the visible portion spring 22 causes the piston 16 and the liquid 20 to return to their original positions.

[0045] Here, when the liquid-sealed container 15 is installed, it is installed so that the center of the upper plate 11 is aligned with the center of the piston 16. This is because, for example, if the liquid-sealed container 15 is installed so that the center of the piston is located near one of the springs 13, it will be affected by the contraction of only the spring 13 close to where it is installed, making it impossible to measure the appropriate weight.

[0046] More specifically, if the industrial waste is unevenly placed near one of the springs 13, the load will be concentrated on one of the springs 13. If a liquid-sealed container 15 is installed near the spring 13 where the load is concentrated, the load will be distributed among the four springs 13, which will result in a difference from the relationship between the amount of contraction of the springs 13 and the amount of movement of the liquid 20 that was calculated based on the distributed load, and weight measurement will not be performed properly. If the liquid-sealed container 15 is installed so that the center of the upper plate 11 and the center of the piston 16 are aligned, even if the industrial waste is unevenly placed near one of the springs 13, the amount of movement of the center of the upper plate 11 toward the lower plate 12 (downward) will not be much different from when the industrial waste is placed at the center of the upper plate 11, and accurate weight measurement will be possible.

[0047] As described above, according to this embodiment, it is possible to provide a weight measuring device that is resistant to dust and can confirm weights on the order of tons because it does not use an electric circuit.

[0048] (Second embodiment) FIG. 7 shows a top cross-sectional view of a visible portion 31 of a weight measuring device 30 according to the second embodiment.

[0049] In the weight measuring device 30 according to the second embodiment, the configuration of the visualizing unit 31 is partially different from the visualizing unit 19 in the weight measuring device 10 according to the first embodiment. In Fig. 7, the same components as those in the weight measuring device 10 according to the first embodiment are given the same reference numerals as in the first embodiment, and the description thereof will be omitted.

[0050] As shown in Figure 7, the visible section 31 differs in configuration from the weight measuring device 10 of the first embodiment in that it has a connecting partition plate 32, a reinforcing section 33, and a reinforcing section spring 34 between the partition plate 21 and the liquid 20 in the visible section 19.

[0051] The connecting partition plate 32 is, for example, a round bar provided with circular sliding plates at both ends, which are sliding parts that slide against the inner surface of the visible part 31. One of the sliding plates is in contact with the liquid 20, and one end of a reinforcing part spring 34, which is a reinforcing part elastic body, is attached to the opposite surface. The other end of the reinforcing part spring 34 is attached to the reinforcing part 33. The reinforcing part 33 is fixed to the visible part 31, and has a second small hole (not shown) in the center to allow the round bar of the connecting partition plate 32 to slide.

[0052] The operation of each part in the visible section 31 according to this embodiment will be described. When industrial waste is placed on the upper plate 11, the liquid 20 moves in the same manner as in the first embodiment. As the liquid 20 moves, the reinforcing section spring 34 contracts, and when the industrial waste reaches a predetermined weight, one end of the connecting partition plate 32 comes into contact with the partition plate 21, as shown in FIG. 8. When industrial waste is loaded in excess of the predetermined weight, the visible section spring 22 contracts further and begins to receive the load.

[0053] As described above, the load is distributed by both the reinforcing portion spring 34 and the visible portion spring 22, so the visible portion 31 is less likely to break than the visible portion 19 according to the first embodiment, even if industrial waste exceeding a predetermined weight is loaded. Load distribution due to an overload of industrial waste will be described in detail below.

[0054] First, in the weight measuring device 10 according to the first embodiment described above, under conditions equivalent to the example of weight measurement described above in the first embodiment, it is assumed that the weight of industrial waste increases from a state in which 1000 kg of industrial waste is loaded, and the contraction amount of each spring 13 becomes 14.7 mm.

[0055] If the elastic force of the visible portion spring 22 is X1, the weight of the industrial waste is =20(kgf / mm)×14.7(mm)×4+X1(kgf)-50(kgf)-15(kgf) =1111(kgf)+X1(kgf) This becomes:

[0056] The amount of liquid 20 that moves to the visible portion 19 is 100(cm 2 )×2.5(mm)=25(cm 3 ) is.

[0057] The cross-sectional area of ​​the horizontal part 18 and the visible part 19 is 1 cm 2 Therefore, the liquid 20 travels 25 cm through the horizontal portion 18 and the visible portion 19.

[0058] Here, since the spring constant of the visible portion spring 22 is 0.98 kgf / mm, the elastic force X1 of the visible portion spring 22 is X1 = 0.98 (kgf / mm) x 25 (cm) =245(kgf) This becomes:

[0059] Therefore, the weight of industrial waste is: 1111(kgf)+X1(kgf) =1111(kgf)+245(kgf) =1356(kgf) This becomes:

[0060] That is, when there is an overload of 356 (kgf), the load received by the visible portion spring 22 (the reaction force received by the end portion 24) is 245 (kgf).

[0061] Next, in the weight measuring device 30 of the second embodiment, assume that the weight of the industrial waste increases further from the state described above (a state in which 1000 kg of industrial waste is loaded), and the amount of contraction of each spring 13 becomes 14.2 mm.

[0062] If the sum of the elastic force of the visible portion spring 22 and the elastic force of the reinforcing portion spring 34 is X2, the weight of the industrial waste is (Elastic force of spring 13) + (Elastic force of visible portion spring 22 + Elastic force of reinforcing portion spring 34) -50 (kgf) -15 (kgf) =20(kgf / mm)×14.2(mm)×4+X2(kgf)-65(kgf) =1071(kgf)+X2(kgf) This becomes:

[0063] The amount of liquid 20 that moves to the visible portion 31 is 100(cm 2 ) x 2.0 (mm) = 20 (cm 3 ) is.

[0064] The cross-sectional area of ​​the horizontal part 18 and the visible part 31 is 1 cm 2 Therefore, the liquid 20 travels 20 cm through the horizontal portion 18 and the visible portion 31.

[0065] Here, the spring constant of the visible portion spring 22 is 0.98 kgf / mm, so if the elastic force of the visible portion spring 22 is x1, then: x1=0.98(kgf / mm)×20(cm) =196(kgf) The spring constant of the reinforcing portion spring 34 is 0.98 kgf / mm. If the elastic force of the reinforcing portion spring 22 is x2, then: x2 = 0.98 (kgf / mm) x 15 (cm) =147(kgf) This becomes:

[0066] Therefore, the weight of industrial waste is: 1071(kgf)+X2(kgf) =1071(kgf)+x1(kgf)+x2(kgf) =1071(kgf)+196(kgf)+147(kgf) =1414(kgf) This becomes:

[0067] That is, when there is an overload of 414 (kgf), the load received by the visible portion spring 22 (the reaction force received by the end portion 24) is 196 (kgf).

[0068] Therefore, when the overload weight of industrial waste in the weight measuring device 30 is 414 (kgf), the reaction force received by the end 24 is 196 (kgf), whereas when the overload weight of industrial waste in the weight measuring device 10 of the first embodiment is 356 (kgf), the reaction force received by the end 24 is 245 (kgf).It can be seen that in the weight measuring device of the second embodiment, the reaction force received by the end 24 is small even though the overload weight is large.

[0069] As described above, according to this embodiment, it is possible to provide a weight measuring device that is more capable of preventing damage due to overloading than the weight measuring device 10 according to the first embodiment.

[0070] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the invention and its equivalents as defined in the claims. [Explanation of symbols]

[0071] 10...Weight measuring device according to first embodiment, 11...Upper plate, 12...Lower plate, 13...Spring, 14...Industrial waste basket (industrial waste basket), 15...Liquid-sealed container, 16...Piston, 17...Cylindrical portion, 18...Horizontal portion, 19...Visible portion, 20...Liquid, 21...Partition plate, 22...Visible portion spring, 23...Guide line, 24...End portion, 25...Small hole, 30...Weight measuring device according to second embodiment, 31...Visible portion, 32...Connecting partition plate, 33...Reinforcing portion, 34...Reinforcing portion spring

Claims

1. A weight measuring device for measuring the weight of industrial waste, The base plate that is placed on the ground, An upper plate provided above the lower plate on which industrial waste is placed; an elastic body provided between the lower plate and the upper plate and biased in a direction in which the upper plate moves away from the lower plate; a liquid-sealed container that is placed on the lower plate, has a liquid sealed therein, and has a visible portion that allows the amount of movement of the liquid to be visually observed; a piston that is slidably provided inside the liquid-sealed container, and when a load is applied to the upper plate, the elastic body contracts, causing the upper plate to move toward the lower plate, thereby moving the liquid inside the liquid-sealed container; and A weight measuring device comprising:

2. the visible portion is provided in the liquid-sealed container near an end opposite to the piston, and a partition plate is movable together with the liquid inside the visible portion; a visible portion elastic body having both ends fixed to the partition plate and the end portion; The weight measuring device of claim 1 further comprising:

3. At least one first small hole is provided at the end portion to discharge internal air as the partition plate moves. The weight measuring device according to claim 2 .

4. a reinforcing portion fixed to the visible portion and having a second small hole at its center, the reinforcing portion being located between the liquid and the partition plate; a connecting partition plate provided at both ends of a rod that can slide through the second small hole and slides with the visible part, one of the sliding plates being in contact with the liquid; a reinforcing portion elastic body having both ends fixed to the reinforcing portion and the sliding plate that is in contact with the liquid; The weight measuring device according to claim 3, further comprising:

5. A guide line is provided in the visible portion to allow visual confirmation that the weight of the industrial waste has reached a set weight. The weight measuring device according to claim 1 or 4.

6. the liquid-sealed container is placed on the lower plate so that a center of the upper plate and a center of the piston are aligned when the upper plate and the piston come into contact with each other; The weight measuring device according to claim 1 or 4.

7. a cross-sectional area of ​​the sliding portion of the piston that is larger than a cross-sectional area of ​​the visible portion so as to amplify the amount of movement of the liquid due to the sliding of the piston in the visible portion; The weight measuring device according to claim 1 or 2.

Images