JP2000171289A - Load cell scale - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To sufficiently absorb shock and vibration acting on a load cell from a saucer. An elastic member (17) interposed between a support frame (16) connected to a load receiving end (15) of a load cell (14) and a tray (18) supported by the support frame (16) is formed in a hemispherical shape. This makes it difficult for the shock or vibration applied to the tray 18 to be transmitted to the load cell 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load cell scale in which a receiving portion is connected to a movable portion of a load cell in which a fixed portion is connected to a main body housing.

[0002]

2. Description of the Related Art At present, load cell scales for calculating the weight of an article as electrical data are in practical use.

FIGS. 4 and 5 show an example of a prior art load cell scale. The load cell balance 1 connects the substantially center of the X-shaped support frame 4 to the load receiving end 3 of the load cell 2,
The receiving tray 7 is supported by a rubber cap 5 which is an elastic member individually attached to the four end portions of the support frame 4 and a rubber sheet 6 attached to four places near the center.

In the load cell scale 1 having such a structure, the amount of distortion generated in the load cell 2 due to the weight of the articles loaded on the pan 7 is electrically measured by a strain gauge (not shown) to execute the measurement. ing.

[0005]

The rubber cap 5 and the rubber sheet 6 are provided to prevent the impact or vibration acting on the tray 7 from the articles to be placed from acting on the load cell 2.

However, in the load cell scale 1, the rubber cap 5 and the rubber sheet 6 have poor absorption of the impact force when a shock or vibration is given to the tray 7 due to their flat plate shapes. Rubber sheet 6 to saucer 7
The reaction force acts greatly.

For this reason, the shock or vibration is transmitted to the load cell 2, and there is a disadvantage that it takes a long time until the measurement result display is set to a constant value.

SUMMARY OF THE INVENTION It is an object of the present invention to sufficiently absorb shock and vibration acting on a load cell from a pan.

[0009]

According to the load cell scale of the present invention, the fixed end of the load cell is connected to the body housing side and the support frame is connected to the load receiving end.
In a load cell balance in which a tray is supported by the support frame via an elastic member, the elastic member is formed in a hemispherical shape.

Therefore, it becomes difficult for the shock or vibration applied to the pan to be transmitted to the load cell.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

First, the load cell scale 11 of the present embodiment
The X-shaped support frame 16 is substantially connected to the load receiving end 15 of one load cell 14 having the fixed end 13 connected to the main body housing 12.

In the vicinity of the four ends of the support frame 16, cushion rubbers 17, which are elastic members, are fixed, and the cushion rubbers 17 support the tray 18. Here, the cushioning rubber 17 is a hemisphere having a hemispherical surface 19 and a circular flat surface 20. The circular flat surface 20 is attached to the support frame 16 with, for example, a double-sided tape with the hemispherical surface 19 facing the saucer 18 side. ing.

The load cell 14 has a strain generating portion 21.
A strain gauge (not shown) is attached to the upper surface and the lower surface of the device, and a processing circuit 22 is connected to the strain gauge. The processing circuit 22 is connected to a display unit 23 for displaying the weight of the article placed on the tray 18 and a keyboard 24 provided with keys and the like for setting a zero point.

In such a configuration, the load cell scale 1
In FIG. 1, when a strain is generated in the strain generating portion 21 of the load cell 14 in accordance with the weight of an article (not shown) loaded on the tray 18,
Since the resistance value of the strain gauge that generates strain together with the strain generating portion 21 changes, the change in the resistance value is replaced with the change in voltage value, and the processing circuit calculates the weight of the article. The calculated weight and the like are displayed on the display unit 23.

The cushion rubber 17 interposed between the support frame 16 and the tray 18 prevents impacts and vibrations acting on the tray 18 from the articles to be loaded from acting on the load cell 14. Therefore, the articles placed on the tray 18 can be quickly weighed.

According to the present embodiment, as compared with the load cell scale 1 using a conventional elastic member, shock and vibration are less likely to be transmitted to the load cell 14, and the time required for the measurement result display to be set to a constant value is reduced. short.

[0018]

According to the first aspect of the present invention, since the elastic member for buffering the force applied to the pan is formed in a hemispherical shape, it is difficult for the shock and vibration applied to the pan to be transmitted to the load cell. The time required for the display to be set at a constant value can be shortened.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view showing a structure of a load cell scale according to an embodiment of the present invention.

FIG. 2 is a plan view showing a support frame to which an elastic member is attached.

FIG. 3 is a block diagram illustrating an electrical connection of each unit included in the load cell scale.

FIG. 4 is a vertical sectional side view showing the structure of a conventional load cell scale.

FIG. 5 is a plan view showing a support frame to which an elastic member is attached.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Load cell balance 12 Main body housing 13 Fixed end 14 Load cell 15 Load receiving end 16 Support frame 17 Elastic member 18 Receiving tray

Claims (1)

[Claims] 1. A load cell scale wherein a fixed end of a load cell is connected to a main body housing side, a support frame is connected to a load receiving end, and a tray is supported by the support frame via an elastic member. Is formed in a hemispherical shape.