JPH07899Y2 - Load cell scale - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a load cell balance provided with a substantially flat plate-shaped saucer having a relatively large area.

2. Description of the Related Art Generally, a load cell scale has a saucer coupled to one end of a load cell that is distorted in response to a load, and the weighing object is measured by a measuring means connected to a strain gauge or the like attached to the strain-generating portion of the load cell. Is electronically calculated, and is displayed on a digital display, for example. Here, in order to be able to measure various objects, the tray is usually provided in a flat plate shape having a relatively large area.

Problems to be Solved by the Invention Here, for example, when the above-mentioned load cell balance is installed in front of an air conditioner or the like, the descending cold air or the ascending warm air acts on the pan as a disturbance.

In other words, as described above, the saucer of the load cell balance is formed in the shape of a flat plate with a large area, so this air resistance value is large, and when the wind as described above hits here, the display of the load cell balance fluctuates from moment to moment. , For example, the last digit of the digital display flickers, which makes it very unsightly. further,
Since the plate-shaped saucer is heavy, it is easily affected by the vibration of the installation surface of the load cell balance, which also causes the flicker of the display. In particular, such a flickering of the display occurs even when the load cell balance in which the object to be weighed is not placed on the pan is not used, and thus the seller and the purchaser feel distrust. Therefore, the reliability of the load cell balance is low.

As a measure against such a problem, a method of stabilizing the display by using a low-pass filter or the like in the computer section of the measuring means can be considered. However, forming such a circuit is costly and impractical because the load cell balance becomes expensive.

Means for Solving Problems In a load cell balance provided with a load cell to which a pan on which a weighing object is placed is coupled and a measuring means for calculating the weight of the weighing object based on an output value from the load cell, A large number of holes as blow-through holes for air were formed on the entire surface of the saucer.

By forming a large number of holes in the saucer, air blows through these holes, so the air resistance value of this saucer is small, and even if the load cell scale is installed in falling cold air or rising warm air. , These do not act as a disturbance on the saucer,
In addition, the weight of the pan can be reduced, so there is little effect from vibrations on the floor, and the numerical value on the display does not flicker when the load cell scale is not in use, yet it can be corrected by an expensive circuit such as a low-pass filter. It can be omitted.

Embodiment A first embodiment of the present invention will be described with reference to FIGS. 1 and 2. The same parts as those in the above-described conventional example have the same names, and the description thereof will be omitted. Load cell balance 1 of this embodiment
Also, a connecting shaft 4 is connected to one end of a load cell 3 fixed in the main body 2, and a pan receiving frame 5 and a receiving plate 6 which are substantially integrally provided are attached to the upper end of the connecting shaft 4. ing. Here, as shown in FIG. 1, the dish receiving frame 5 has a shape in which a strength member 9 is radially extended from a central portion 8 connected to the connecting shaft 4 by a bolt 7 or the like. There is. Further, the saucer 6 is L here.
Rectangular outer frame portion 10 and a plurality of horizontal rail portions 11 formed in the mold section
Thus, for example, a ladder shape is formed, and a hole 12 is provided between these horizontal rails 11.

In such a configuration, the load cell balance 1 can place a weighing object on the tray 6 and measure its weight, as in the conventional load cell weighing apparatus.

In this load cell scale 1, the tray 6 is provided with an outer frame portion 10 and a horizontal rail portion 11
Since the hole portion 12 functions as an air blow-through hole due to the formation of and, the air resistance value of the tray 6 is low. For this reason, for example, even if the load cell balance 1 is installed in front of an air conditioner or the like, and even if the tray 6 is in the range of cold air that descends or warm air that rises, these will blow through the holes 12 and become Does not act as a disturbance. further,
The skeleton tray 6 as described above can be made lighter than a flat tray or the like. That is, even if the installation surface of the load cell balance 1 vibrates, the influence of this vibration on the tray 6 is extremely small. Therefore, the display is prevented from flickering when the load cell balance is not used.

Here, as described above, the air resistance value of the weighing object may be large even if the flicker of the display when the weighing object is not placed on the tray 6 and the load cell balance 1 is not used is prevented. Therefore, when such a weighing object is placed on the tray 6, the display may still flicker. However, the influence of the above-described air flow or vibration is usually extremely small compared to the weight of the object to be weighed.
The flickering of the display when placed on is only a phenomenon common to various scales, and does not give distrust to the purchaser.

For example, a post office may be used as the place where the load cell balance 1 is used.
A scale that can measure even small parcels is required. Here, in the load cell balance 1, since the pan 6 and the pan support frame 5 have a skeleton structure, it is possible to reduce the weight without lowering the rigidity, and the load cell balance 1 can accurately measure a minute weight. However, it can be expected to be able to measure large weights.

Next, a second embodiment of the present invention will be described with reference to FIGS. 3 and 4. A main body 14 of the load cell balance 13 is formed in a dome shape, and other than that, the load cell balance 13 is configured similarly to the load cell balance 1.

In such a configuration, in the load cell balance 13, since the shape of the main body 14 is a dome shape, the air passing through the hole 12 from above or the like flows efficiently, so that the receiving tray 6 is expected to be more stable.

Effect of the Invention According to the present invention, since a large number of holes as air blow-through holes are formed on the entire surface of the saucer as described above, air blows through these holes, so that the air resistance value of this saucer is small and the descending Even if the load cell scale is installed in cold air that rises or warm air that rises, these do not affect the saucer as a disturbance,
In addition, the weight of the saucer can be reduced, so there is little influence from vibrations on the floor surface, etc.There is no flickering of the value on the display when the load cell scale is not used, so sellers and purchasers feel distrust. It is possible to obtain a highly reliable load cell balance without any problems, and since it is possible to omit the correction by an expensive circuit such as a low-pass filter, it is expected that the cost of the load cell balance will be reduced, and the rigidity of the pan is not reduced. Since the weight can be reduced, it is expected to obtain a versatile load cell scale that can accurately measure a small load but can measure a large load.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of the first embodiment of the present invention, FIG. 2 is a side view, FIG. 3 is a perspective view of the second embodiment, and FIG. 4 is a side view. 1 ... load cell scale, 3 ... load cell, 6 ... saucer,
12 ... hole, 13 ... load cell scale

Claims (1)

[Scope of utility model registration request] 1. A load cell balance comprising a load cell to which a pan on which a weighing object is placed is coupled, and a measuring means for calculating the weight of the weighing object based on an output value from the load cell. A load cell balance characterized in that a large number of holes are formed as air blow-through holes.