JPH025383Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a platform weighing device, and particularly to a platform weighing device whose external dimensions can be easily changed during manufacturing.

"Prior Art" Figures 7A and 7B show the configuration of a conventional platform weighing device. In these figures, 1 is a base supported by support legs 2, . . . , and 3a to 3d are movable units. The load cell has a side end fixed to a weighing pan 4 (not shown in FIG. 7A) and a fixed side end fixed to a base 1. Two or four strain gauges (not shown) are attached to each of these load cells 3a to 3d at predetermined intervals. When an object to be weighed is placed on the weighing pan 4, strain is generated in each load cell 3a-3d due to the load applied to each movable end of each load cell 3a-3d, and this strain is removed by a strain gauge. This detects the weight of the object to be weighed.

"Problems to be solved by the invention" By the way, the above-mentioned conventional platform weighing device is intended for weighing relatively large objects, and the base 1 and weighing pan 4 are designed to ensure rigidity. It was composed of cast products. This results in
It had the following drawbacks.

When attempting to manufacture a platform weighing device with arbitrary external dimensions, individual molds are required according to the external dimensions, making it difficult to easily change the external dimensions and, therefore, depending on the user's requirements. was unable to respond adequately.

Since it is made of a cast product, it is heavy and therefore difficult to handle during manufacturing and maintenance.

Manufacturing costs are high.

There is a gap G between the base 1 and the weighing pan 4 as shown in FIG.
In order to provide waterproof and rustproof protection against 3D,
As shown in the figure, it is necessary to cover the entire circumference of the gap G with the bellows-shaped elastic member C, which makes it difficult to provide a waterproof and rust-proof structure.

The present invention was developed in view of the above-mentioned circumstances, and is a platform weighing device that can be constructed lightweight and inexpensively, allows easy selection of external dimensions during manufacturing, and can also be easily constructed to be waterproof and rust-proof. is intended to provide.

"Means for Solving the Problems" The present invention comprises a pair of frames made of pipe material and arranged parallel to each other, a connecting member that interconnects each of the frames, and a connecting member that connects each of the frames to each other. A load cell is arranged inside a hollow at both ends, and each movable side end is attached to the inside of the upper surface of the frame, and a load cell is attached to the fixed side end of each of the load cells, and is formed on the lower surface of the frame. It is characterized by comprising a support leg projecting downward from the through hole, and a weighing pan placed on the frame and the connecting member.

"Operation" By cutting the frame and the connecting member into arbitrary length dimensions and assembling them, a lightweight and inexpensive platform weighing device with arbitrary external dimensions can be manufactured, and each load cell can be individually arranged within the frame. Therefore, each load cell is protected by the frame.

"Embodiments" Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 are diagrams showing the configuration of an embodiment of the present invention. In these figures, 10a,1
0b is a pair of frames made of pipe material with a rectangular cross section and arranged parallel to each other, and upper connecting members 12a, 12b, 12c and lower connecting members are attached to the upper and lower surfaces of each frame 10a, 10b, respectively. They are interconnected by members 14a and 14b. In this case, the upper connecting members 12a, 12
b and 12c are made of pipe materials with a rectangular cross section, and the lower connecting members 14a and 14b are made of plate-like members with a rectangular cross section. Load cells 3a, 3b, 3c, and 3d are arranged in hollow interiors at both ends of each frame 10a, 10b, and the movable end portions of these load cells 3a, 3b, 3c, and 3d are connected to each other through spacers 16. The load cells 3a, 3b,
L-shaped mounting fittings 20 are attached to the fixed side ends of 3c and 3d by screws 22. A female threaded hole is formed in the horizontal plate portion of each mounting bracket 20, and a leg shaft 24a having a male thread is screwed into this female threaded hole. The leg shaft 24a has a through hole 1 formed on the lower surface of the frames 10a and 10b.
A support plate 24b is provided at the lower end of the support plate 24b, which protrudes downward from 0c and comes into contact with the floor surface. The support leg 24 is constituted by the leg shaft 24a and the support plate 24b, and by rotating the support plate 24b, the height of each load cell 3a, 3b, 3c, 3d is adjusted, and the height of each load cell 3a, 3b, 3c, 3d is adjusted. It is now possible to adjust the levelness. on the other hand,
Rubber blocks 26 for cushioning are attached to both ends of the upper connecting members 12a, 12c so as to close the openings, and each of the frames 12a, 12c
A cushioning rubber plate 28 is attached to the upper surfaces of b and 12c. Each frame 12a, 12b, 1
A weighing pan 30 is placed on 2c via a rubber block 26 and a rubber plate 28. The weighing pan 30 is composed of an outer plate 32 and a reinforcing plate 34,
Both the outer plate 32 and the reinforcing plate 34 are made of iron plate or stainless steel plate. In addition, in the figure, 36 is a level attached to the upper surface of the frame 10a.

In the above-described configuration, when manufacturing a platform weighing device with arbitrary external dimensions, the frame 10
a, 10b and connecting members 12a, 12b, 12
c, 14a, 14b can be cut to any desired length and assembled. Therefore, there is no need for separate molds according to the external dimensions as in the past, and it is possible to change the external dimensions. This can be done easily and therefore can fully meet the needs of the user. In addition, since the frames 10a, 10b and the connecting members 12a, 12b, 12c are made of pipe material, they are lighter in weight than conventional ones, and therefore easier to handle during manufacturing and maintenance. It is also inexpensive to manufacture. Furthermore, load cells 3a to 3d are in frame 1.
0a and 10b, each load cell 3a to
3d is protected, and as shown in FIG.
A rubber block 36 for cushioning each opening of 12c,
By closing the rubber blocks 36 with..., the rubber blocks 36,... can serve both as a waterproof and rustproof lid and as a cushioning material from above and from the sides.

Next, modifications of each part of the above-described embodiment will be described. FIG. 4 shows an example in which the load cells 3a to 3d are arranged so that the directions of their movable end portions and fixed end portions are all aligned. In this case, arm flex due to distortion of the load cells 3a to 3d when a load is applied to the weighing pan 30 can be prevented, and measurement precision can be improved.
Further, FIG. 5 shows an example in which the hollow interiors of frames 10a and 10b are completely sealed. In this figure, 38 is a rubber cover that closes the opening at the end of the frame 10a. Reference numeral 39 denotes a column that is fitted and fixed into a mounting hole 3e formed at the fixed end of the load cell 3a, and has a female threaded hole 39a into which the leg shaft 24a is screwed. An opening 10d is formed on the lower surface of the frame 10a to facilitate attachment of the load cell 3a, and a plate 40 is attached with screws 41 to close this opening 10d. An opening 40a is formed in the plate 40, and a rubber cover 42 covering the opening 40a is attached with screws 43.
The rubber cover 42 has a round hole 42a through which the leg shaft 24a is inserted, and an annular pressing plate 45 is arranged on the outside of the rubber cover 42, and the pressing plate 45, the rubber cover 42, and the lower end of the column 39 is fixed by a screw 46. Frame 1
The hollow interiors of 0a and 10b are completely sealed.
In addition, when the height dimension of load cells 3a-3d is larger than the hollow part of frames 10a and 10b, what is necessary is just to make the board 40 convex downward.

Note that the load cells applied to the platform weighing device of the present invention are not limited to the load cells 3a to 3d described above, and shear type load cells, column type load cells, etc. may also be used, and for example, as shown in FIG. A plate-shaped load cell 50 having a pair of thin parts each having a strain gauge 48 attached thereto may be used.

"Effects of the Invention" As explained above, according to the present invention, a pair of frames made of pipe material and arranged parallel to each other, a connecting member that interconnects each of the frames, and A load cell is arranged inside a hollow at both ends of each frame, and each movable side end is attached to the inside of the upper surface of the frame, and each load cell is attached to the fixed side end of each load cell, and the lower surface of the frame. Since the supporting legs protruding downward from the through holes formed in the frame and the measuring pan placed on the frame and the connecting member are provided, the frame and the connecting member can be cut to any desired length and assembled. With this, it is possible to manufacture a lightweight and inexpensive platform weighing device with arbitrary external dimensions, and since each load cell is placed within the frame, each load cell is protected by the frame. Therefore, it is easy to create a waterproof and rust-proof structure.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the configuration of an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line -2 in FIG. FIG. 4 is a cross-sectional view showing another method of attaching the load cell in the same embodiment, and FIG. 5 is a cross-sectional view showing the structure when the inside of the frame is completely sealed in the same embodiment. FIG. 6 is a sectional view showing the structure of another load cell applied in the same embodiment, and FIGS. 7A and 7B are a plan view and a front sectional view showing the structure of a conventional platform weighing device. 3a, 3b, 3c, 3d...Load cell, 10
a, 10b...Frame, 10c...Through hole, 12
a, 12b, 12c, 14a, 14b...Connection member, 24...Support leg.

Claims (1)

[Scope of utility model registration request] A pair of frames made of pipe material and arranged parallel to each other, a connecting member that connects the frames to each other, and a connecting member that is arranged in a hollow interior at both ends of each frame, and a connecting member that connects each movable side. load cells whose ends are respectively attached to the inner side of the upper surface of the frame; support legs which are attached to fixed side ends of each load cell and protrude downward from through holes formed in the lower surface of the frame; and the frame. and a weighing pan placed on a connecting member.