JPH038982Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a mechanism for attaching an instrument to a panel such as a panel.

[Technical background of the invention and its problems]

As a method of attaching the instrument to a panel such as a panel,
As shown in FIG. 1, the meter body 1 is inserted from the front of the panel 5, the front flange 6 of the meter body is brought into contact with the surface of the panel 5, and the flat plate is fixed to the body of the meter body 1 with the fixing screws 4. The mounting method is such that the panel 5 is sandwiched between the clamping screw 3 and the front flange 6 of the instrument body using the fixing fitting 2 as a fulcrum.

However, with this method, if the tightening screws 3 are insufficiently tightened, there will be looseness in the installation of the instrument, and the instrument may not be able to demonstrate its full performance due to vibrations in the panel 5, or conversely, the tightening screws 3 If tightened too much, the instrument body 1 may be deformed or damaged, damaging the internal mechanism of the instrument body 1, or the flat plate fixing fittings 2 may be deformed, causing the tips of the tightening screws 3 to draw a circle, causing the panel 5
There was a problem that caused damage to the surface.

[Purpose of invention]

An object of the present invention is to provide an instrument mounting mechanism that avoids over-tightening and insufficient tightening of the tightening screws, and allows proper tightening at all times.

[Summary of the idea]

The present invention consists of an instrument body that is inserted through a mounting hole in a panel such as a panel, and whose front flange portion is in contact with the panel surface around the mounting hole; A fixing fitting is attached with two parallel sides parallel to the panel, and guide holes are concentrically drilled in each of the two parallel sides, and a screw tip is inserted into the guide hole of the fixing fitting to the panel. The screw is inserted toward the back side and has a threaded portion extending a predetermined length from the screw tip, and the remaining portion up to the screw head is formed as an unthreaded portion having an outer diameter smaller than the male thread root diameter of the threaded portion. a tightening screw, a square nut that is screwed into the tightening screw and is located between two parallel sides of the fixing metal fitting and is prevented from rotating by a side connecting these two sides; and the square nut and the fixing member. An anti-compression elastic member is provided between the side of the screw head side of the fitting and the non-threaded portion of the tightening screw to prevent external insertion, and the tip of the tightening screw is in contact with the back surface of the panel. When the tightening screw is turned in the state of contact, the square nut comes off from the threaded part of the tightening screw and enters the unthreaded part, causing the tightening screw to rotate idly and is removed from the compressed compression-resistant elastic member. An instrument mounting mechanism characterized in that the tightening screw is pressed against the back surface of the panel with a predetermined pressing force via a threaded end facing toward a non-threaded part.

[Example of idea]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 shows the instrument mounting mechanism of an embodiment of the present invention, FIG. 3 shows the details of the fixing fittings in FIG. 2, and FIG. 4 shows the tightening screws. As shown in FIGS. 2 and 3, the fixing fitting 11 is attached to a pair of sides of the body inside the panel of the instrument body 1, with two U-shaped parallel sides 11a and 11b parallel to the panel 5. , an extension of one of the two parallel sides 11b is fixedly attached by a fixing screw 12.
Then, the two parallel sides 11a, 11 of the fixture 11
Guide holes 13 are concentrically drilled in each of the holes b.

As shown in FIG. 4, the tightening screw 14 has a threaded portion 14a extending a predetermined length from the tip of the screw,
The remaining portion up to the screw head 14c is an unthreaded portion 14b having an outer diameter smaller than the root diameter of the male thread of the threaded portion.
The guide hole 13 of the fixing fitting 11
The screw tip is inserted into the panel 5 with its tip facing toward the back surface of the panel 5. The threaded portion 14a of this tightening screw 14
, the two parallel sides 11a and 11b of the fixture 11
A square nut 15 is screwed into the side 11c that connects the two parallel sides 11a and 11b.
Rotation is locked by. Further, between the square nut 15 and the side 11b of the fixture 11, an anti-compression elastic member, such as a compression coil spring 16, is inserted into the non-threaded portion 14b of the tightening screw 14. Therefore, the values of the overall length of the tightening screw, the length of the screw part, the spring constant and free length of the compression coil spring 16 are determined when the tightening screw is screwed in with the tip of the tightening screw in contact with the back surface of the panel 5. Due to rotation,
Each of the square nuts 15 is selected so that the square nut 15 receives a predetermined pressing force from the compressed compression coil spring 16 when the square nut is removed from the threaded portion and entered into the unthreaded portion of the tightening screw.

In the instrument mounting mechanism of the embodiment of the present invention configured as described above, the tightening screw 14 is screwed in and rotated with the tip of the tightening screw 14 in contact with the back surface of the panel 5, as shown in FIG. and square nut 1
5 advances toward the screw head 14c, and eventually the screw portion 14
a and enters the unthreaded part 14b, causing the tightening screw 14 to rotate idly, and receiving a predetermined pressing force from the compressed compression coil spring 16, so that the end of the threaded part 14a faces the unthreaded part 14b. The tightening screw 14 is pressed against the back surface of the panel 5 with a predetermined pressing force. Therefore, even if the tightening screw is screwed in and rotated any further, it will only rotate idly, and an excessive pressing force will not be applied to the back surface of the panel 5, and the instrument can be attached and fixed to the panel with an appropriate pressing force. .

Note that the present invention is not limited to the above-mentioned embodiments, and can be implemented with the following modifications.

[a] As shown in FIG. 5, instead of the compression coil spring, a cylindrical insert 21 made of rubber or the like may be used as the compression-resistant elastic member.

[b] As shown in FIG. 6, a protective cap 22 made of a material with low hardness such as plastic and shaped like a cap may be attached to the tip of the tightening screw 14 to prevent damage to the panel.

[c] As shown in FIG. 7, a female threaded hole is provided concentrically from the tip of the threaded portion 23a of the tightening screw 23, and an auxiliary screw 24 is screwed therethrough, and the tightening screw 2
3 may be made variable in length, and the attachment may be adjusted depending on the panel thickness.

[Effect of idea]

As detailed above, according to the present invention, the panel is sandwiched between the front flange of the instrument body and the tightening screw screwed into the fixing bracket attached to the body of the instrument body inserted into the mounting hole of the panel. In the instrument mounting mechanism, in which the instrument body is fixed to the panel by tightening, the U-shaped fixing bracket guides the tightening screw at two points in its axial direction, and the tightening screw has a threaded portion of a predetermined length from the tip. The square nut is screwed into the threaded part of the tightening screw, and its rotation is stopped by the fixing bracket, and the compression coil spring fitted onto the tightening screw is attached to the fixing bracket. The square nut compresses the compression coil spring as the tightening screw is screwed in and rotated with the other end holding the square nut and the tip of the tightening screw in contact with the back of the panel. , the deflection of a given compression coil spring,
In other words, when a predetermined pressing force is applied by the compression coil spring, the square nut comes off the threaded part and enters the unthreaded part, causing the tightening screw to spin idly.This prevents further pressing force from being applied to the tightening screw. The pressing force applied to the panel surface by the mounting screws automatically reaches an appropriate predetermined level, which prevents deformation or damage to the instrument body due to over-tightening of the tightening screws, and prevents the instrument from wobbling due to insufficient tightening. can do.

[Brief explanation of the drawing]

Figure 1 is a diagram showing a conventional example of the instrument mounting mechanism, Figure 2
The figure shows a meter mounting mechanism according to an embodiment of the present invention, FIG. 3 is a partial detailed view of the fixing fitting in FIG. 2, FIG. 4 is an external view of the tightening screw, and FIGS. 7
Each figure shows a different modification of the present invention. 1...Measurement body, 5...Panel, 6...Front flange, 11...Fixing metal fittings, 11a, 11b...
Parallel sides of the fixing bracket, 11c... Side connecting two parallel sides of the fixing bracket, 13... Guide hole, 14...
Tightening screw, 14a... Threaded part, 14b... Unthreaded part, 14c... Screw head, 15... Square nut, 16... Compression coil spring, 21... Insert, 22... Protective crown, 23... ...Tightening screw, 24...
...Auxiliary screw.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A meter body that is inserted through a mounting hole in a panel such as a panel, and whose front flange portion is in contact with the panel surface around the mounting hole, and a body within the panel of this meter body. A fixing metal fitting attached to a pair of side surfaces with two U-shaped parallel sides parallel to the panel and having guide holes concentrically drilled in each of the two parallel sides, and a guide for the fixing metal fitting. The screw is inserted into the hole with the tip of the screw facing toward the back surface of the panel, and has a threaded portion extending a predetermined length from the tip of the screw, and the remaining portion leading to the screw head has an outer diameter smaller than the root diameter of the male thread of the threaded portion. A tightening screw formed in the non-threaded part, and a square nut screwed into the tightening screw and located between two parallel sides of the fixing metal fitting and whose rotation is locked by the side connecting these two sides. , an anti-compression elastic member externally inserted into the unthreaded portion of the tightening screw is provided between the square nut and the side of the screw head side of the fixing fitting, and the tip of the tightening screw is When the tightening screw was turned while it was in contact with the back surface of the panel, the square nut came off the threaded part of the tightening screw and entered the unthreaded part, causing the tightening screw to idle and become compressed. An instrument mounting mechanism characterized in that a predetermined pressing force is applied from the anti-compression elastic member, and the tightening screw is pressed against the back surface of the panel with a predetermined pressing force via a threaded end facing toward a non-threaded portion. (2) The instrument mounting mechanism according to claim 1, wherein the compression-resistant elastic member is a compression coil spring. (3) The instrument mounting mechanism according to claim 1, wherein the compression-resistant elastic member is a cylindrical insert. (4) Claim 1 of the utility model registration claim characterized in that the tightening screw has an auxiliary screw screwed into an internal threaded hole provided at the tip of the threaded portion, and has a structure that allows the overall length to be varied. instrument mounting mechanism.