WO2020065746A1

WO2020065746A1 - Tank with scales

Info

Publication number: WO2020065746A1
Application number: PCT/JP2018/035569
Authority: WO
Inventors: 康司椿井; 茂之村上
Original assignee: 株式会社ハイテム
Priority date: 2018-09-26
Filing date: 2018-09-26
Publication date: 2020-04-02
Also published as: JPWO2020065746A1; CN112654567A

Abstract

Provided is a tank with scales which is prevented from falling even when a load cell has become damaged. In the present invention, a tank with scales, in which scale units (S) are disposed on respective lower ends of multiple leg sections (20) supporting the tank, is configured such that each scale unit is provided with: a mounting base (30) to which the leg section is fixed, with the leg section being mounted thereon; a strain gauge-based load cell (40), a load-receiving part (41a) of which is positioned directly below the leg section; a load transmission section (50) connected to the mounting base at the upper end side and placed in contact with the load-receiving part at the lower end, thereby transmitting a load applied to the mounting base to the load-receiving part; and two or more support structures (60) disposed around the load cell without coming into contact with the load cell, wherein at least a portion of an upper plate (61) of each support structure is positioned below the mounting base with a gap from the mounting base.

Description

Tank with scale

The present invention relates to a tank provided with a scale for measuring the weight of contents.

Conventionally, in order to measure the weight of the contents stored in the tank, a tank with a scale in which a strain gauge type load cell is arranged between the lower end of the support leg and the installation surface has been used. The present applicant has also implemented a scaled tank for storing feed in a livestock facility such as a poultry farm. By measuring the weight of the feed in the tank, the underfeeding amount (feeding amount) can be accurately and easily grasped, and the remaining amount and the replenishment amount of the feed in the tank can be managed.

The strain gauge type load cell converts the load into an electric signal based on detecting the deformation of the flexure element due to the load as a change in the electric resistance value by the strain gauge. That is, since the load cell needs to be deformed, there is a limit in making the load cell a sturdy structure. For this reason, when the tank receives a large impact due to an earthquake or the like, there is a concern that the tank may fall due to damage to the load cell. In practice, each leg supporting the tank uses a load cell with a rated capacity (measurable maximum load) of several thousand kilogram-weight to 20,000 kilogram-weight. There is almost no risk that the tank will fall over due to this. However, a company that introduces a tank with a scale has requested a tank with a scale provided with a safety measure to prevent the load cell from falling even if the load cell is damaged.

Therefore, the present invention is directed to a scaled tank in which a strain gauge type load cell is disposed between the lower end of a support leg and an installation surface, and the tank with a scale is prevented from overturning even if the load cell is damaged. Is to be provided.

In order to solve the above problems, the tank with a scale according to the present invention is:
`` A scale-equipped tank having a scale portion at the lower end of each of a plurality of legs supporting the tank,
Each of the scale parts is
A mounting table on which the leg is fixed while the leg is mounted,
A strain gauge type load cell in which a load receiving part is located immediately below the leg,
A load transmitting portion that transmits the load applied to the mounting table to the load receiving portion, wherein the load transmitting portion is connected to the mounting table on the upper end side, and the lower end is in contact with the load receiving portion.
Without contacting the load cell, two or more support structures disposed around the load cell,
At least a part of the upper end surface of each of the support structures is located below the mounting table, and a gap is provided between the supporting structure and the mounting table. "

In this configuration, the plurality of legs supporting the tank are fixed to the mounting table while being mounted on the mounting table, respectively, and the load applied to one mounting table is one through the load transmitting unit. It is transmitted to the load receiving portion of the load cell. Therefore, one load cell detects the weight borne by one of the legs, the weight of one leg, and the weight of one mounting table among the weight of the tank and the contents contained in the tank. . Therefore, for all the load cells, the weight of the tare, that is, the sum of the weight of one of the legs, the weight of one of the legs, and the weight of one of the mounting tables is detected by the load cell. By subtracting from the calculated weight, the weight of the contents stored in the tank can be grasped.

In this configuration, two or more support structures are arranged around the load cell, and at least a part of the upper end surface of each support structure is located below the mounting table. It is not in contact with the load cell, and there is a gap between the upper end surface of the support structure and the mounting table. Therefore, when the scaled tank is used normally, the support structure does not affect the weight detection by the load cell.

On the other hand, if the load cell is damaged by a large impact such as an earthquake, the mounting table loses the part that supported it, but there is a support structure below the mounting table. Therefore, the mounting table that has fallen without support is received by the support structure and mounted on the upper end surface. Accordingly, since the leg fixed while being mounted on the mounting table is supported by the support structure, the leg is prevented from tipping over, and the tank supported by the leg is prevented from tipping over. .

The support structure according to the present invention, in addition to the above configuration,
"In each of the scale portions, a bolt is loosely inserted into a hole penetrating the mounting table and a hole penetrating the support structure, so that the support structure and the support structure are connected to each other. It is positioned without being fastened to the mounting table. "

In this configuration, the mounting table and the support structure are positioned relative to each other by bolts inserted into holes penetrating through the mounting table and the support structure, respectively. Accordingly, even when the support structure is greatly vibrated due to an earthquake or the like, the positional relationship in which the support structure exists below the mounting table does not collapse, and the mounting table can be reliably supported by the support structure. Then, the bolt is only loosely inserted into each of the holes penetrating the mounting table and the holes penetrating the support structure, and the mounting table and the support structure are not fastened. When the scaled tank is used normally, the above-described positioning by the bolt does not affect the weight detection by the load cell.

As described above, according to the present invention, a tank with a scale in which a strain gauge type load cell is arranged between the lower end of the support leg and the installation surface, and even if the load cell is damaged, overturn is prevented. Scaled tanks can be provided.

FIG. 1 is a perspective view of a tank with a scale according to one embodiment of the present invention. FIG. 2 is an exploded perspective view of the vicinity of the scale portion in the tank with a scale of FIG. FIG. 3 is a plan view of one leg supporting the scaled tank of FIG. 1 and a scale at the lower end thereof. FIG. 4 is a perspective view taken along line XX in FIG. FIG. 5A is a front view of the scale-equipped tank of FIG. 1 in the vicinity of the scale portion during normal use, and FIG. 5B is a front view of the same area as FIG. 5A when the load cell is damaged. It is.

Hereinafter, a specific embodiment of the present invention will be described with reference to FIGS. In the following description, “up and down” means upper and lower in a use state where the tank with scale 1 is erected on the installation surface G.

タンク The tank 1 with a scale of the present embodiment includes a tank 10, a plurality of legs 20, and a plurality of scales S provided for each leg 20. The tank 10 has a conical part 12 extending above the cylindrical part 11 and an inverted conical part 13 extending below. The tank 10 is openable and closable at the upper end of the conical part 12. It has a supply port 15 formed and a discharge port 16 formed at the lower end of the inverted conical portion 13 so as to be openable and closable.

The leg 20 supporting the tank 10 includes a column 21 made of channel steel, and a plate-shaped leg bottom 22 covering the lower end of the column 21 from below. The leg bottom surface portion 22 increases the mechanical strength of the leg portion 20 and increases the area of the lower end of the leg portion 20 in the direction orthogonal to the axial direction of the column 21. The support 21 is fixed to the surface of the cylindrical portion 11 in parallel with the axial direction of the cylindrical portion 11. A hole 25 is formed in the center of the leg bottom portion 22.

The plurality of legs 20 are provided at equal angular intervals with respect to the central axis of the cylindrical portion 11. FIG. 1 illustrates a case where the number of the legs 20 is six, but the number of the legs 20 can be set according to the size and weight of the tank 10, for example, from three to eight. be able to. The scaled tank 1 further includes a horizontal member 29 connecting the tank 10 and the leg 20, and the mechanical strength of the supporting structure of the tank 10 by the leg 20 is reinforced.

The scale portion S is provided between the lower end of each of the plurality of legs 20 and the installation surface G. That is, the number of the scale portions S is the same as the number of the leg portions 20. Each of the scale units S includes a mounting table 30, a strain gauge type load cell 40, a load transmitting unit 50, and two or more support structures 60.

The mounting table 30 is a rectangular flat plate having an area larger than the leg bottom 22 and has a hole 31 penetrating the center. Further, near the pair of short sides of the mounting table 30, second holes 32 are provided at positions equidistant from the holes 31.

The load cell 40 includes a load cell main body 41, a fixing base 43, and an installation base 44. The load cell main body 41 has a load receiving portion 41a made of a strain body on one end side, has a fixed portion 41b on the other end side, and has a strain gauge attached to a strain gauge (not shown in the drawing). Type. The fixing base 43 is a rectangular parallelepiped block, and the fixing portion 41 b of the load cell main body 41 is attached by a bolt 47. By fixing the fixing portion 41b to the fixing base 43, a space is formed below the load receiving portion 41a by the height of the fixing base 43.

The installation base 44 is a flat plate, and the fixing base 43 is fixed on the upper surface thereof, and is fixed to the installation surface G by an anchor (not shown). Therefore, the installation base 44 fixes the load cell main body 41 to the installation surface G via the fixing base 43. In addition, the protection wall 49 rises upward from a pair of side edges of the installation base 44.

The load transmitting unit 50 is formed by coaxially connecting a plurality of members whose axial direction is the vertical direction, and the lower end thereof is in contact with the load receiving unit 41 a of the load cell main body 41. The upper end of the load transmitting portion 50 is formed of a connecting shaft 51 which is an externally threaded male screw inserted into the hole 31 of the mounting table 30. A large-diameter portion 52, which is a cylinder having an outer diameter larger than the hole portion 31, is provided below the connection shaft 51 in the load transmitting portion 50. The plurality of members constituting the load transmitting unit 50 can include a sphere and a spherical seat.

The connecting shaft 51 is inserted into the hole 31 from below with the upper surface of the large-diameter portion 52 abutting against the lower surface of the mounting table 30, and further inserted into the hole 25 of the leg bottom portion 22 from below. It is fastened with a nut 54 from above the leg bottom portion 22. Here, between the nut 54 and the mounting table 30, a flat pressing plate 56 in which the connecting shaft 51 is inserted through a through hole 58 is interposed. By tightening the female screw of the nut 54 to the male screw of the connecting shaft 51, the leg bottom portion 22 and the mounting table 30 are sandwiched between the holding plate 56 and the large-diameter portion 52, and the leg portion 20 and the mounting table 30. Are connected to the load transmitting unit 50.

As a result, the load applied to the mounting table 30, that is, the sum of the weight borne by one leg 20, the weight of the leg 20, and the weight of the mounting table 30 out of the weight of the tank 10 and the internal substance is transmitted to the load. The power is transmitted to the load receiving portion 41a of the load cell main body 41 via the portion 50. Here, since the hole 25 into which the connecting shaft 51 of the load transmitting portion 50 is inserted is located at the center of the leg bottom portion 22, the load receiving portion in which the lower end of the load transmitting portion 50 whose vertical direction is the axial direction abuts. 41 a is located directly below the leg 20.

There are two support structures 60 in this embodiment, and they are symmetrically arranged with the load cell 40 interposed therebetween without contacting the load cell 40. Each support structure 60 is formed by connecting a flat plate-shaped lower plate 62 to be in contact with the installation surface, a flat plate-shaped upper plate 61 parallel to the lower plate 62, and the lower plate 62 and the upper plate 61 at the center. And a flat steel wall 63 having an I-shaped cross section. Further, each support structure 60 further includes a reinforcing rib 64 extending perpendicularly from the center of the upright wall 63 and connecting the upper plate 61 and the lower plate 62. Here, the upper surface of the upper plate 61 in the present embodiment corresponds to “the upper end surface of the support structure” of the present invention.

The height of the upper plate 61 is set so that the upper surface thereof is lower than the mounting table 30. That is, the contents of the upper limit value that can be accommodated in the tank 10 are temporarily accommodated in the tank 10, and the strain body of the load cell 40 is deformed accordingly, whereby the mounting table 30 is moved through the load transmitting unit 50. The height of the upper plate 61 is set so that a space is maintained between the mounting table 30 and the upper plate 61 even if the lowering unit descends.

As shown in FIG. 3, each of the two support structures 60 is such that the upper plate 61 is located below a portion of the mounting table 30 having an area larger than the leg bottom portion 22 and extending to the outside of the leg bottom portion 22. Are located. Further, the upper plate 61 of the present embodiment is a rectangle in which the direction of the long side is orthogonal to the rectangular mounting table 30, and the length of the long side of the upper plate 61 is longer than the length of the short side of the mounting table 30. large. That is, as shown in FIG. 3, the upper plate 61 of the support structure 60 has a portion protruding from a portion directly below the mounting table 30.

In the upper plate 61 of each support structure 60, a hole 65 is provided at a position not interfering with the standing wall 63 and the reinforcing rib 64 and at a position directly below the second hole 32 of the mounting table 30. ing. Then, the bolt 70 with the head 71 is inserted into the second hole 32 of the mounting table 30 from above, and further inserted into the hole 65 of the upper plate 61 from above. A nut 72 is screwed into the bolt 70 from below the upper plate 61 of the mounting table 30, but the nut 72 is not tightened to the bolt 70. The sizes of the second hole 32 of the mounting table 30 and the hole 65 of the upper plate 61 are smaller than the head 71 of the bolt 70 but sufficiently larger than the outer diameter of the bolt 70.

Accordingly, the bolt 70 is loosely inserted into the second hole 32 and the hole 65. That is, although the bolt 70 is prevented from dropping downward by the head 71 and prevented from lifting upward by the nut 72, the mounting table 30 and the upper plate 61 are not fastened. In other words, the bolt 70 positions the mounting table 30 and the support structure 60 with respect to the counterpart without transmitting the load applied to the mounting table 30 to the support structure 60.

According to the above configuration, as shown in FIG. 5A, in the tank with scale 1 in a normal use state, the weight detected by one load cell 40 is the load applied to the mounting table 30, It is the sum of the weight of one leg 20, the weight of one leg 20, and the weight of one mounting table 30 among the weights of the internal product. The support structure 60 exists below the mounting table 30, but since the mounting table 30 and the support structure 60 are only loosely positioned by the bolts 70, the load applied to the mounting table 30 is reduced. It is not transmitted to 60. In addition, since the support structure 60 is not in contact with the load cell 40, the support structure 60 does not affect the weight detection by the load cell 40. Therefore, the tare (the sum of the weight of one leg 20, the weight of one leg 20, and the own weight of one mounting table 30 of the weight of the tank 10) is subtracted from the weight detected by the load cell 40. Then, the weight borne by one leg portion 20 of the weight of the internal substance of the tank 10 can be known, and the total weight of the internal substance of the tank 10 can be calculated by integrating the detection values of the plurality of load cells 40. You can figure out.

If the load cell 40 is damaged by a large impact such as an earthquake, for example, if the load transmitting unit 50 is damaged or the load cell body 41 buckles, the load cell 40 is conventionally supported on the installation surface G. There is a possibility that the tank 10 may fall over due to the fall of the leg portion 20 having lost the damaged portion. On the other hand, in the tank 1 with the scale of the present embodiment, even if the mounting table 30 which has lost the portion supported by the mounting surface G due to the damage of the load cell 40 falls due to its own weight, the supporting structure is provided below it. The body 60 is present. Therefore, as shown in FIG. 5B, the mounting table 30 is mounted on the upper plate 61 of the support structure 60 and is supported by the support structure 60. Therefore, the legs 20 fixed to the mounting table 30 while being mounted on the mounting table 30 do not fall, and it is possible to effectively suppress the tank 10 supported by the legs 20 from falling. it can.

Since the supporting structure 60 is formed of a strong and rigid shaped steel, the mounting table 30 to which the leg 20 supporting the tank 10 is fixed can be firmly received. In particular, in the support structure 60 of the present embodiment, since the auxiliary rib 64 is further provided on the I-shaped cross-section steel, the mechanical strength of the support structure 60 is further increased.

In addition, in the present embodiment, the upper plate 61 of the support structure 60 has a portion protruding from a portion directly below the mounting table 30. Therefore, even if the position of the mounting table 30 is slightly shifted with respect to the support structure 60, the mounting table 30 can be received by the support structure 60 when the load cell 40 is damaged. Further, in this embodiment, the mounting table 30 and the upper plate 61 of the support structure 60 are loosely positioned by the bolts 70. Therefore, even if a large vibration acts due to an earthquake, the position of the mounting table 30 does not significantly shift with respect to the support structure 60, and the mounting table 30 is reliably supported by the support structure 60 when the load cell 40 is damaged. can do.

(4) Since the support structure 60 is formed using a section steel having an I-shaped cross section, the upper plate 61 has a portion projecting from the standing wall 63. Therefore, the hole 65 through which the bolt 70 for loosely connecting the mounting table 30 and the support structure 60 is passed through the support structure 60 can be easily formed while using a highly rigid section steel. it can.

As described above, the present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to the above embodiments, and various improvements and design changes can be made without departing from the gist of the present invention. It is.

For example, in the above embodiment, the case where the number of the support structures 60 is two and the support structures 60 are symmetrically disposed with the load cell 40 interposed therebetween is illustrated. The present invention is not limited to this, and a larger number of support structures 60 are arranged so as to surround the load cell 40, and the mounting table 30 of the mounting table 30 is overlapped with any of the upper end surfaces of these many support structures 60 in plan view. The area can be set large. Thus, when the mounting table 30 falls due to damage to the load cell 40, the mounting table 30 can be reliably supported by the support structure 60 even if the falling direction varies due to vibration such as an earthquake.

In the above, the case where the load cell main body 41 is of a beam type has been described as an example. However, a load cell having a different shape of the load cell main body such as a column type or a disk type may be used.

Claims

A scale-equipped tank including a scale portion at a lower end of each of a plurality of legs supporting the tank,
Each of the scale parts is
A mounting table on which the leg is fixed while the leg is mounted,
A strain gauge type load cell in which a load receiving part is located immediately below the leg,
A load transmitting portion that transmits the load applied to the mounting table to the load receiving portion, wherein the load transmitting portion is connected to the mounting table on the upper end side, and the lower end is in contact with the load receiving portion.
Without contacting the load cell, two or more support structures disposed around the load cell,
A tank with a scale, wherein at least a part of an upper end surface of each of the support structures is located below the mounting table, and a gap is provided between the supporting structure and the mounting table.
In each of the scale portions, a bolt is loosely inserted into a hole penetrating the mounting table and a hole penetrating the support structure, so that the supporting structure and the mounting table are loosely inserted. The tank with a scale according to claim 1, wherein the tank is positioned without being fastened.