JPH1076438A - Machine operation panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent deformation of a sheet by the difference of expansion ratio between a peripheral member and the sheet in a machine operation panel. SOLUTION: In an operation panel having a sheet 3 on a panel surface 4, a middle member 2 having a similar expansion ratio to that of the sheet 3 is provided on the sheet 3, and a peripheral member 1 is provided on the middle member 2. Direct contact of the peripheral member 1 with the sheet 3 is avoided by the middle member 2 provided between the sheet 3 and the peripheral member 1, and effects of expansion of the peripheral member 1 on the sheet 3 are prevented, thereby deformation of the sheet 3 by the difference of expansion ratio between the peripheral member 1 and the sheet 3 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a machine operation panel provided with a display device and an input device.

[0002]

2. Description of the Related Art A machine device such as a machine tool has a machine operation panel, and inputs commands and various parameters and performs various displays such as a control state by an input device and a display device provided on the machine operation panel. . FIG. 4 is a plan view schematically showing the machine operation panel 9. In FIG. 4, the machine operation panel 9 has a CR
A display device 6 such as a T and various input devices 8 such as a key switch and a rotary switch are provided on the same plane. A polyester sheet 3 is attached to the surface of the machine operation panel 9 for dust prevention and oil protection.

[0003] The switch portion of the input device 8 is separated from the outside air portion by the sheet 3 provided on the upper side, and protects dust and oil contained in the use environment from entering. The display device 6 is in close contact with the sheet 3 like the input device 8 to prevent dust and oil from entering the inside of the display device, and is called an escutcheon 1 with the sheet 3 sandwiched between the outer peripheral portions of the display unit. Peripheral members are provided to provide a cover case for protecting the display screen from dust, oil or contact.

[0004] The sheet 3 covers the entire surface of the machine operation panel 9, and its peripheral portion is attached to a sheet metal portion of the lower panel surface by a sheet push plate 7 to protect an end face portion. As shown in FIG. 6A, a cross-sectional structure of the machine operation panel 9 is such that a polyester sheet 3 is stuck on a sheet metal 4 on a panel surface, and a sheet at an outer peripheral portion of the display device is provided. An escutcheon 1 made of resin is mounted on 3.

[0005]

A conventional machine operation panel is
There is a problem that the sheet has an adverse effect such as deformation in an environment of high temperature and high humidity. When a peripheral member such as an escutcheon is provided on a sheet of a machine operation panel, a difference occurs between the amount of expansion of the peripheral member and the amount of expansion of the sheet due to a difference in expansion rate between the peripheral member and the sheet. Due to the difference in the amount of elongation, the sheet that is in contact with the peripheral member is pushed open and deformed.

FIG. 5 is a schematic perspective view for explaining deformation of a conventional sheet, and FIG. 6B is a schematic cross-sectional view for explaining deformation of a conventional sheet. Escussion 1
When the elongation of the sheet 3 is greater than the elongation of the sheet 3, the escutcheon 1 pushes and expands the sheet 3 by the difference in the amount of elongation to generate a wrinkle 10 as shown in FIGS. 5 and 6 (b). Let it. When the deformation of the sheet 3 further proceeds, the sheet 3
The adhesive between the metal plate 4 and the sheet metal 4 on the board surface is peeled off, and a bubble portion 11 is generated.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems of the conventional machine operation panel and prevent the machine operation panel from deforming a sheet due to a difference in expansion coefficient between a peripheral member and the sheet. I do.

[0008]

SUMMARY OF THE INVENTION According to the present invention, there is provided a machine operation panel having a sheet provided on a board surface, wherein an intermediate member having an expansion coefficient equivalent to that of the sheet is provided on the sheet, and a peripheral member is provided on the intermediate member. The intermediate member provided between the sheet and the peripheral member avoids direct contact between the peripheral member and the sheet, thereby preventing the expansion of the peripheral member from affecting the sheet. The sheet is prevented from being deformed due to a difference in expansion coefficient between the member and the sheet.

The sheet, the intermediate member, and the peripheral members expand due to temperature and humidity. The amount of elongation due to this expansion is caused by the difference between the coefficient of thermal expansion or the coefficient of moisture expansion. Here, assuming that the expansion coefficient of the sheet and the intermediate member are similar values,
The difference in the amount of elongation between the two becomes small. Further, a difference in the amount of elongation occurs between the intermediate member and the peripheral member due to different expansion rates, but the influence of the difference in the amount of elongation does not reach the sheet due to the structure in which the intermediate member is interposed. Therefore, it is possible to prevent the deformation of the sheet due to the difference in the expansion coefficient between the peripheral member and the sheet (corresponding to claim 1).

The intermediate member is a member having a coefficient of thermal expansion similar to that of the sheet, so that deformation of the sheet due to temperature can be prevented (corresponding to claim 2). Further, the intermediate member is a member having a coefficient of humidity expansion similar to that of the sheet, thereby preventing deformation of the sheet due to humidity (corresponding to claim 3).

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. Machine operation panel 9 of the present invention
As shown in the schematic plan view of FIG. 4, a display device 6 such as a CRT and various input devices 8 such as a key switch and a dial are provided.
Are arranged on the same plane, and a polyester sheet 3 is attached to the surface of the machine operation panel 9 for dust prevention and oil prevention, and is fixed by a sheet push plate 7.

A peripheral member called an escutcheon 1 is provided on an outer peripheral portion of the display section of the display device 6.
The display screen is protected from dust, oil and contact.

FIG. 1 is an exploded perspective view of each part for explaining the structure of the machine operation panel of the present invention. FIG. 1 shows the configuration of a part of the machine operation panel in a state where each part is separated. The sheet metal 4 on the panel surface is a base member that forms a casing or the like of the machine operation panel, is formed of an iron plate or the like, and has an opening for displaying a display screen of a display device 6 such as a CRT installed therein. I have. The display device 6 is attached to the sheet metal 4 on the board surface from the inside with a packing 5 for preventing dust, oil, and the like interposed therebetween.

The sheet 3 is mounted on the surface of the sheet metal 4 by means of an adhesive such as a double-sided adhesive sheet. The sheet 3 is a film having characteristics such as electrical insulation, heat resistance, cold resistance, and chemical resistance including oil resistance, and water resistance, which are suitable for the use environment. For example, a film of polyester or the like can be used. The sheet 3 covers the surface of the sheet metal 4 on the board, and can also cover the display screen of the display device 6 using a sheet having a good visible light transmittance. Alternatively, it is also possible to form an opening corresponding to the display screen in the sheet 3 to expose the display screen.

The machine operation panel 9 of the present invention has a structure in which the intermediate member 2 is sandwiched between the sheet 3 and the resin escutcheon 1, and has a coefficient of expansion similar to that of the sheet 3. An opening corresponding to the display screen is formed in the intermediate member 2 and the escutcheon 1, and the display screen is observed through the opening.

FIG. 2 is a perspective view of a part of the machine operation panel, showing a state in which the components shown in FIG. 1 are combined. In FIG. 1, the escutcheon 1 is attached to the sheet 3 with the intermediate member 2 interposed at least at the portion of the escutcheon 1.

Hereinafter, the escutcheon 1, the intermediate member 2,
The example of the material of sheet 3 and the expansion rate are shown. Escussion 1
Can be formed using, for example, an ABS resin.
ABS resin is a thermoplastic resin having good mechanical, electrical, and thermal properties such as impact resistance and rigidity, and is used for molding electric machine components. This ABS
The coefficient of thermal expansion of the resin is, for example, 8.0 to 9.0 × 10
⁻⁵ (cm / cm / ° C.). The coefficient of thermal expansion is
The values vary with the composition, but are approximately the same.

Further, a polyethylene resin can be used as the escutcheon 1. The coefficient of thermal expansion of this polyethylene resin is 10.0 to 20.0 × 10 ^-5 (cm / c).
m / ° C.).

The sheet 3 has electrical insulation, heat and cold resistance,
A film having characteristics suitable for the use environment such as chemical resistance including oil resistance and water resistance, for example, a film of polyester or the like can be used. The coefficient of thermal expansion of this polyester film is 1.5 × 10 ⁻⁵ (cm / cm
/ ° C).

As the intermediate member 2 for the sheet 3, an iron thin plate having a similar coefficient of thermal expansion can be used. The coefficient of thermal expansion of this iron is 1.18 × 10 ⁻⁵ (cm /
cm / ° C.), which is almost the same as the thermal expansion coefficient of the above polyester film of 1.5 × 10 ⁻⁵ (cm / cm / ° C.).

Hereinafter, the elongation amount due to thermal expansion when each of the above-mentioned materials is used is calculated and compared. 180mm in length
Under the condition that the temperature difference is 35 degrees, the elongation of the ABS resin is 0.57 cm, the elongation of iron is 0.07 cm, and the elongation of the polyester is 0.09 cm. Therefore, the elongation of the intermediate member in contact with the sheet is substantially the same.

FIG. 3 is a schematic sectional view of the machine operation panel.
It shows the state before and after the inflation similarly to FIG. FIG.
(A) is a state before expansion, and changes to a state shown in FIG. 3 (b) depending on temperature or humidity. Table 1 shows measured values of the amount of elongation of the escutcheon 1, and shows the amount of elongation substantially the same as the calculated value described above.

[0023]

[Table 1] Therefore, comparing the state before and after the expansion, in FIG. 3B, the expansion amount D due to the expansion of the escutcheon 1 is larger than the expansion amount d due to the expansion of the intermediate member 2 and the sheet 3, but the sheet 3 has the escutsion 1 Since the intermediate member 2 is interposed between the escutcheon 1 and the escutcheon 1, the influence of the extension of the escutcheon 1 can be avoided.

In the above embodiment, the case of the thermal expansion coefficient is shown as the expansion coefficient. However, it is empirically known that the humidity expansion coefficient takes the same form as the thermal expansion coefficient. When the intermediate member has a humidity expansion coefficient similar to the humidity expansion coefficient, deformation of the sheet due to humidity expansion can be prevented.

[0025]

As described above, according to the present invention,
In the machine operation panel, it is possible to prevent the deformation of the sheet due to the difference in the expansion coefficient between the peripheral member and the sheet.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of each part for explaining a configuration of a machine operation panel of the present invention.

FIG. 2 is a perspective view of a part of the machine operation panel of the present invention.

FIG. 3 is a schematic sectional view of the machine operation panel of the present invention.

FIG. 4 is a plan view schematically showing a conventional machine operation panel.

FIG. 5 is a schematic perspective view for explaining a deformation of a conventional sheet.

FIG. 6 is a schematic sectional view of a conventional machine operation panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Machine operation panel 2 Intermediate member 3 Sheet 4 Board surface metal sheet 5 Packing 6 Display device 7 Sheet push plate 8 Input device 10 Wrinkle 11 Bubble part

Claims (3)

[Claims] 1. A machine operation panel having a sheet provided on a board surface, wherein an intermediate member having an expansion coefficient equal to that of the sheet is provided on the sheet, and a peripheral member is provided on the intermediate member. Operation board. 2. The machine operation panel according to claim 1, wherein the intermediate member has a coefficient of thermal expansion similar to a sheet. 3. The machine operation panel according to claim 1, wherein the intermediate member has a coefficient of moisture expansion similar to a sheet.