WO2005085778A1

WO2005085778A1 - Windshield device for scale

Info

Publication number: WO2005085778A1
Application number: PCT/JP2004/012849
Authority: WO
Inventors: Misao Nomura
Original assignee: Shinko Denshi Company Limited
Priority date: 2004-03-03
Filing date: 2004-09-03
Publication date: 2005-09-15

Abstract

A scale is contained in a scale case (1), and a weighing pan (2) is installed on the upper surface of the case (1). A windshield (6) approximately semicylindrical as a whole is assembled to surround the weighing pan (2) on the case (1). The windshield (6) is produced by the injection molding of transparent synthetic resin which itself has an antistatic function. Since the windshield (6) has no static electricity produced therein, a measurement as accurate as in a glass-made windshield is possible without any possibility of affecting weighing accuracy.

Description

Specification

Scale windshield

Technical field

[0001] The present invention relates to a windshield device of a balance used for, for example, an electronic force or a beam for measuring the weight of a light object to be weighed.

Background art

[0002] In electronic scales and the like that require accurate weighing of articles, in order to avoid the influence of wind pressure and turbulence from the surroundings on measurement accuracy, outside air is cut off to a certain extent, and In some cases, it is essential to take measurements around the windshield.

Disclosure of the invention

Problems to be solved by the invention

[0003] A glass windshield is used to force an electron that requires a highly accurate measurement result.

. However, if a windshield made of a transparent synthetic resin such as ordinary acrylic resin or ABS is used, static electricity will be generated on the windshield, and the resulting electrostatic attraction will act on the weighing object and affect the measurement accuracy. , High-precision measurement becomes impossible.

[0004] Also, even if the surface is coated with an antistatic agent for the purpose of preventing static electricity, charging can be temporarily prevented, but the effect is not perfect and the effect does not last for a long time.

[0005] A glass windshield is not affected by this static electricity, but a flat glass plate, which is difficult to mold into a complicated shape such as a curved surface, is cut into a predetermined size and fitted into a frame to assemble it. There is a disadvantage that the weight of the windshield itself is increased due to the limitation.

[0006] It is an object of the present invention to solve the above-mentioned problems and to provide a windshield device for a scale using a transparent, synthetic resin material that is lightweight, inexpensive, and can be molded into any shape that does not generate static electricity. .

Means for solving the problem

[0007] A windshield device of a balance according to the present invention for achieving the above object is characterized by being formed of a transparent synthetic resin material having an antistatic function and arranged around a weighing dish. [0008] Further, the windshield device of the balance according to the present invention is characterized in that it is composed of a combination of a molded product of a synthetic resin material having an antistatic function and a glass plate, and is disposed around a weighing dish. The invention's effect

According to the windshield device of the balance according to the present invention, since the resin itself has an antistatic property and uses a transparent, synthetic resin that is lightweight, inexpensive, and excellent in workability, it hinders the measurement of the object to be weighed. No static electricity is generated, enabling high-precision weight measurement.

[0010] Furthermore, if the windshield is molded by an injection molding method, it can be integrally molded even with a complicated shape such as a curved surface, so that it can be manufactured at a low weight and at low cost.

Brief Description of Drawings

FIG. 1 is a perspective view of a windshield device of a balance.

FIG. 2 is a perspective view showing a state where a windshield is opened.

Explanation of symbols

[0012] 1 housing

2 Weighing pan

3 LCD panel

4 Switch

5 Power switch

6 Windshield

7 Fixed cover

7a, 8b Top

7b, 8a side

8 times power bar

9 Shaft

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 is a perspective view of the windshield device of the balance. A load measuring mechanism is incorporated in the scale housing 1, a weighing pan 2 is provided on the upper surface of the housing 1, and a liquid crystal panel 3 that displays the measured weight of the weighing object is provided on the front of the housing 1. Switch for zero set, etc.4. Source switch 5 is provided. A substantially boom-shaped transparent draft shield 6 is provided so as to surround the weighing dish 2 on the housing 1.

The windshield 6 is made of a synthetic resin material having a transparent and antistatic function (for example, Bayon (trade name) manufactured by Kureha Chemical Industry Co., Ltd.), and is molded by an injection molding method. This synthetic resin has ion conductivity imparted to the resin itself and has a semi-permanent antistatic function. Further, the effect is not reduced even by washing with water and humidity.

[0015] For example, as shown in FIG. 1, the windshield 6 includes a fixed cover 7 having an arc-shaped upper surface 7a, and a movable turning bar 8 having a similar upper surface 8b. The fixed cover 7 is fixed on the housing 1, has an opening at the front, and has a horizontal shaft 9 on both side surfaces 7b. The rotating power bar 8 is rotatably supported by the fixed cover 7 via a shaft portion 9 on the side surface 8a via a shaft portion 9, and is capable of turning vertically with respect to the fixed cover 7. When the power bar 8 is lowered, it covers the opening of the fixed cover 7 to substantially close the space inside the windshield 6.

When the object to be weighed is placed on the weighing dish 2, first, as shown in FIG. 2, the rotating cover 8 is rotated upward about the shaft 9 along the fixed cover 7, Open draft shield 6. When the rotating cover 8 is raised, the arc-shaped upper surface 8b of the rotating power bar 8 overlaps with the upper surface 7a of the fixed cover 7.

After the object to be weighed is placed on the weighing dish 2 through the opening, the rotating power bar 8 is moved down to close the opening, and the inflow and outflow of outside air are shut off. I do. The weighed value obtained by the load measuring mechanism is displayed on the liquid crystal panel 3.

[0018] In this measurement process, the synthetic resin material constituting the windshield 6 does not generate static electricity that interferes with weighing, so that highly accurate weight measurement of the object to be weighed becomes possible. Since both the fixed cover 7 and the rotating cover 8 are transparent, the inside can be visually recognized. In order to make the inside visible, only the turning power bar 8 of the windshield 6 may be transparent.

Industrial applicability

In this embodiment, the windshield 6 is made of a synthetic resin material having an antistatic function. For example, in the case of a box-shaped windshield, a sliding door that requires a certain amount of weight is a glass door. It can also be a plate.

Claims

The scope of the claims

[1] A draft shield device for a balance, which is formed of a transparent synthetic resin material having an antistatic function and is arranged around a weighing dish.

[2] A windshield device for a balance, comprising a combination of a molded product of a synthetic resin material having an antistatic function and a glass plate, and arranged around a weighing dish.

3. The windshield device according to claim 1, wherein the molded product of the synthetic resin material is molded by injection molding.

4. The windshield device according to claim 1, wherein the molded product comprises a fixed cover having a substantially arc-shaped cross section and a turning bar, and the turning bar can be opened and closed along the fixed cover.