JPS6310504Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to scales such as truck scales and platform scales.

Conventionally, in truck scales and platform scales in which the four corners of a deck are suspended and supported by load cells, as shown in FIG. Each of them forms a spherical seat, and a hemisphere 3 is disposed within each spherical seat, and the vertically opposing hemispheres 3 are connected by a rod 4, whereby the deck 2 is suspended by four load cells 1. It is common that it is lowered.

In this configuration, when the cart 5 moves in the direction of arrow A and attempts to land on the deck 2 as shown, the impact force at that time causes the hemisphere 3 to slide on the spherical seat, causing the deck 2 to move in the same direction as shown by the imaginary line. When the dolly 5 climbs onto the deck 2 by slightly escaping and absorbing the impact force when it climbs up, the hemisphere 3 slides again on the spherical seat and returns to the state shown by the solid line in Figure 1.

By the way, in truck scales and platform scales, water and soil are usually exposed to rough handling, and since the hemisphere 3 and the spherical seat are in surface contact, the slippage between the two becomes poor. hand,
The deck 2 may not return from the state shown by the phantom line in FIG. 1 to the state shown by the solid line in the figure. If weighing is performed in such a state, no central load will be applied to the load cell, resulting in a weighing error.

Therefore, the present invention provides a scale that solves these problems.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 2 to 5. This embodiment relates to a platform scale. 10 is a pair of L-shaped frames 10a that are parallel to each other.
and a pair of flat plates 10b arranged between the mutually opposing ends of both the L-shaped frames 10a, and 11 is a deck arranged above the base frame 10. , 12 is a main girder fixed to both side edges of the deck 11, 13 is a large block fixed near both ends of each L-shaped frame 10a, and 14 is a bending body whose main body is fixed to each block 13 by bolts 15. type load cell, 16 is a vertical through hole formed in the sensing protrusion 14a of each load cell 14 and is formed of a large diameter part 16a and a small diameter part 16b; 17 is a small diameter part at the lower end that fits into the large diameter part 16a; The catch seat 17 is formed with a tapered hole 18 that widens toward the bottom. are made the same. A rod 19 is inserted into the tapered hole 18 and the through hole 16, and a nut 20 is screwed into the threaded portion of the upper end of the rod 19, and is in contact with the upper surface of the seat 17. Note that the diameter of the rod 19 and the tapered hole 18
The diameter of the small diameter portion at the upper end is made the same as that of the upper end. Reference numeral 21 is a ring-shaped body having an arcuate inner circumferential surface, and a screw hole formed in the upper part is connected to the lower end screw portion 19a of the rod 19.
are screwed together. Reference numeral 22 indicates a pair of arms extending from both ends of the main girder 12 so as to sandwich each ring-shaped body 21, and reference numeral 23 indicates a pair of arms 2 having both ends.
2 and inserted into the ring-shaped body 21, each pin 2
The portion that contacts the inner circumferential surface of the ring-shaped body 21 of No. 3 is formed into an arcuate groove 23a. Therefore, the deck 11 includes an arm 22, a pin 23, a ring-shaped body 21,
It is suspended from each load cell 14 via a rod 19, a nut 20, and a seat 17. 24 is a middle block fixed near both ends of each main girder 12;
25 is a stopper bolt which is screwed into the screw hole of the middle block 24 and whose bolt head approaches the side surface of the large block 13;
This is to stop the swinging of the deck 11 in the directions of arrows A and B when climbing onto or descending from the deck. 26 is a small block 2 fixed to a position opposite to the middle block 24 of each L-shaped frame 10a;
Numeral 7 is a stopper bolt which is screwed into the screw hole of the small block 26 and whose bolt head approaches the side surface of the medium block 24, and is used to stop the deck 11 from swinging in the directions of arrows C and D. 28,
Numeral 29 is a lock nut that is screwed into each of the stopper bolts 25 and 27. 30 is each pair of arms 22
Among them, a horizontal shelf fixed to the outer arm 22,
Reference numeral 31 is a stopper bolt that is screwed into a screw hole in the horizontal shelf 30 and whose bolt head approaches the upper surface of the flat plate 10b. The bolt head of the bolt 31 is flat plate 10b.
This prevents the deck 11 from lowering any further and prevents the load cell 14 from being destroyed due to overload. 32 is a lock nut screwed onto the stopper bolt 31. 33 is a clamp bolt whose tip is screwed into the screw hole 35 of the L-shaped frame 10a through the through hole 34 of the horizontal shelf 30, and when shipped, the stopper bolt 3
The bolt head of No. 1 is pressed against the flat plate 10b, and then the clamp bolt 33 is screwed in to press the horizontal shelf 30 and the base frame 10 toward each other, thereby integrally connecting the base frame 10 and the deck 11. This is to prevent the deck 11 from moving due to the shock during transportation and to prevent overload from being applied to the load cell 14. Therefore, after installing this platform scale at the site, the clamp bolt 33 is removed when weighing. 36 is an inclined guide plate, 37 is a cover, and 38 is an indicator.

In the above configuration, when the cart carrying the heavy object to be weighed passes over the guide plate 36 and climbs onto the deck 11, the impact force causes the deck 11 to swing in the directions of arrows A and B, as shown in FIG. The rod 19 becomes oblique as shown by the imaginary line. Then, the nut 20 tilts on the seat 17, and the seat 17 and the nut 20 come into point contact, and the pin 23 is brought into contact with the ring-shaped body 2.
Since both 1 are point contacts, when the impact force disappears,
Immediately, the rod 19 returns to the vertical position shown by the solid line in FIG.

As described above, according to the scale of the present invention, the deck and the load cell are not connected by a spherical body and a hemisphere that are in surface contact with each other as in the conventional example, but a fixing metal fitting is provided on the upper part of the rod, and a fixing metal fitting is provided on the lower part of the rod. The structure is such that the ring-shaped body is fixed to the top of the deck, the fixing metal fittings are brought into contact with the upper surface of the seat of the load cell, and the ring-shaped body is brought into contact with the pin supported by the arm of the deck. When the rod is pushed in the horizontal direction and becomes oblique, it is possible to make point or line contact between the fixing fitting and the catch, and between the ringer and the pin, thereby making the rod tilt. It is possible to immediately return to the vertical state from the oblique state. Therefore, unlike the prior art example mentioned at the beginning, the weight does not become oblique and does not return to its original position, and no weighing errors occur.

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical sectional view showing a conventional example. Figures 2 to 5 show an embodiment of the present invention, with Figure 2 being an overall perspective view, Figure 3 being a partly cutaway plan view of the main parts, and Figure 4 being shown along the - line in Figure 3. FIG. 5 is an enlarged cross-sectional view taken along the - line of FIG. 3. 10...Base frame (fixed body), 11...Deck, 1
4... Load cell, 14a... Sensing protrusion of load cell 14, 16... Through hole, 17... Seat, 18
... Taper hole, 19 ... Rod, 20 ... Nut (fixing metal fitting), 21 ... Ring-shaped body, 22 ... Arm, 23 ... Pin.

Claims (1)

[Scope of utility model registration request] Each load cell is fixed to a fixed body near the four corners of the deck, and a seat is fixed at an appropriate location on the sensing protrusion of each load cell, and a tapered hole that widens downward is formed in the seat, and the sensing protrusion is formed in the seat. A through hole having approximately the same diameter as the large diameter portion of the taper hole is formed concentrically with the taper hole, a rod is inserted into the through hole and the taper hole, and the rod is fixed to the upper part of the rod and the rod is fixed to the upper part of the rod. A fixing fitting is provided that contacts the upper surface of the catch, a ring-shaped body is fixed to the lower part of the rod, a pair of arms are provided that extend from each of the four corners of the deck so as to sandwich each ring-shaped body, and each pair of arms is A scale comprising pins each supported and inserted into the ring-shaped body.