JPH0741067Y2 - Twist operation switch mounting structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a mounting structure of a rotary operation switch, such as a rotary switch, a selector switch and a cam switch, which is mounted on a panel of an operation panel for use.

[Conventional technology]

First, FIGS. 5 to 7 show a conventional mounting structure in which the above-described twisting operation switch is attached to a panel of an operation panel.
In the figure, 1 is a panel of an operation panel, 2 is a twisting operation switch mounted on the panel 1, 3 is a fastening nut, and the switch 2 is attached to the panel 1 as described below.

That is, the shaft portion 5a of the mounting frame 5 combined with the operation shaft 4 of the switch 2 in the front part of the switch body is inserted into the switch mounting hole 1a drilled at a predetermined position of the panel 1 from the rear side of the panel, and in this state, the panel 1 The nut 3 is screwed from the front of the shaft portion 5a to the shaft portion 5a through the washer 6, and the switch 2 is fastened and fixed to the panel 1. In addition, 7 is an O-ring which is fitted on the shaft of the operation shaft 4 and seals between the shaft part 5a of the mounting frame,
Reference numeral 8 is an O-ring that is mounted on the end surface of the switch mounting frame 5 so as to surround the switch mounting hole 1a on the panel side and seals between the back surface of the panel 1 and the O-ring.

On the other hand, when the switch 2 is fastened and fixed with the nut 3, or when the switch is twisted while the switch 2 is mounted on the panel 1, the switch is rotated around the panel and is displaced from the predetermined mounting position. In order to prevent this, in the conventional structure, a locking detent 6b that projects forward is provided on the peripheral edge of the mounting frame 5, and when the switch 2 is mounted, the panel 1 is provided with a perforation side by side with the mounting hole 1a. The engaging projection 6b is fitted into the locking hole 1b to lock the same.

[Problems to be solved by the device]

By the way, when incorporating the above-mentioned twisting operation switch on the operation panel installed on the site side by side with machine tools, etc., it is especially necessary to prevent water and oil splashing from the machine from entering the operation panel. Measures are needed.

In this regard, in the above-described conventional switch mounting structure, the O-ring 8 mounted around the switch mounting hole 1a of the panel 1 and mounted on the mounting frame 5 side of the switch 2 seals between the rear surface of the panel 1. Therefore, it is possible to prevent water, oil, dust, etc. from entering the operation panel through the switch mounting hole 1a.
Since there is no special waterproof or oilproof seal structure for the locking hole 1b into which 6b is fitted, there is a risk that water, oil, etc. will enter the operation panel from the outside through this locking hole 1b. There is.

It should be noted that it is conceivable to seal the locking hole 1b with some kind of waterproof or oil-proof seal, but in this case, in addition to increasing the number of necessary sealing parts, a switch built into the operation panel There is a problem that the number of man-hours increases.

The present invention has been made in view of the above points, and it is not necessary to form a rotation stop locking hole in addition to the switch mounting hole on the panel side of the operation panel. It is an object of the present invention to provide a mounting structure for a twisting operation switch, which is provided with a waterproof function and an oilproof sealing function in addition to a rotation preventing function.

[Means for Solving the Problems]

In order to solve the above-mentioned problem, in the present invention, a rotation preventing tooth row projecting circumferentially is formed on the end surface of the switch mounting frame facing the back surface of the panel, and it is juxtaposed to the tooth row and arranged on the panel side. A waterproof and oil-proof sealing member surrounding the switch mounting hole drilled in

[Action]

With the above configuration, when the switch is mounted on the operation panel panel and fastened with the nut, the tooth row protruding forward from the end face of the mounting frame is strongly pressed so as to bite into the back surface of the panel, and the tooth row installed together with the tooth row is attached. A seal member such as a ring is also strongly pressed against the back surface of the panel. Therefore, a large frictional force acts between the switch and the back surface of the panel, which reliably prevents the switch from rotating when the nut is tightened or the switch is twisted. Further, water, oil, and the like that enter the operation panel from the outside through the switch mounting holes of the panel are blocked by the sealing member.

In addition, when the above-mentioned tooth row is formed into a sawtooth shape which is opposed to the tightening direction of the nut upon implementation, a higher effect of preventing the switch from rotating can be obtained.

〔Example〕

FIGS. 1 to 4 show a mounting structure of a twisting operation switch according to an embodiment of the present invention, and FIGS.
The same members corresponding to those in the drawings are designated by the same reference numerals.

That is, the structure of the present invention does not have the locking projection 6b (see FIG. 5) in the conventional structure described above, but instead, the end face of the mounting frame 5 of the twisting operation switch 2 is provided with a seal installed in the circumferential groove. A row of teeth 9 is formed on the outer peripheral side of the O-ring 8 as a member so as to protrude forward. Also,
As shown in FIG. 3, the tooth row 9 is formed in a sawtooth shape which is opposed to the tightening direction of the nut 3 shown by the arrow. The tooth row 9 is molded integrally with the mounting frame 5. On the other hand, the panel 1 of the operation panel to which the switch 2 is attached
As shown in FIG. 4, only the switch mounting hole 1a is perforated, and the locking hole 1b as shown in FIG. 7 is not perforated.

With such a configuration, as described with reference to FIG. 5, when the shaft 5a of the mounting frame 5 of the switch 2 is inserted from the rear side of the panel 1 and the nut 3 is screwed into the shaft 5a from the front of the panel 1 and tightened, The tooth row 9 described above is strongly pressed so as to bite into the back surface of the panel 1, and at the same time, the O-ring 8 is also strongly pressed against the panel surface. As a result, a large frictional force acts between the rear surface of the panel 1 and the mounting frame of the switch 2 via the O-ring 8 and the tooth row 9, and when the nut 3 is tightened or the switch is twisted when mounted. Thus, the switch 2 itself is prevented from turning around on the panel. Further, the O-ring 8 reliably blocks water, oil, dust, and the like from entering the operation panel from the outside through the switch mounting hole 1a formed in the panel 1.

[Effect of device]

As described above, in the twisting switch mounting structure according to the present invention, the rotation preventing tooth row protruding circumferentially is formed on the end surface of the switch mounting frame facing the back surface of the panel, and the tooth row is formed. By providing a waterproof and oilproof seal member surrounding the switch mounting holes drilled on the panel side by side, only one switch mounting hole for inserting the shaft part of the switch mounting frame is drilled in one place on the operation panel panel. By simply tightening the nut when mounting the switch or operating the switch after mounting the switch, the switch can be firmly fastened and fixed at a predetermined position on the panel without being rotated together on the panel.
Moreover, water, oil, etc. that try to enter the operation panel from the outside
Dust and the like can be reliably blocked by a sealing member such as an O-ring arranged side by side in the dentition.

[Brief description of drawings]

FIG. 1 is a sectional view showing a mounting structure of an embodiment of the present invention,
2 is a front view of the twisting operation switch in FIG. 1, FIG. 3 is a sectional development view of the tooth row in FIG. 2, and FIG.
FIG. 5 is a front view of the panel in the figure, FIG. 5 is a sectional view showing a structure for mounting a conventional twisting operation switch, FIG. 6 is a front view of the twisting operation switch in FIG. 5, and FIG. It is a front view of a panel. In the figure, 1: Panel of operation panel, 2: Twist operation switch, 3: Fastening nut, 4: Switch operation shaft, 5: Switch mounting frame, 5a:
Shaft, 8: O-ring (seal member), 9: Tooth row.

Claims (1)

[Scope of utility model registration request] 1. A structure for mounting a twisting operation switch mounted on a panel of an operation panel for use, wherein a shaft part of a switch mounting frame is inserted from behind into a switch mounting hole formed on the panel, and the shaft part is fitted to the shaft part. In the case where the switch is fastened and fixed to the panel by screwing the nut from the front of the panel, on the end surface of the switch mounting frame facing the back surface of the panel,
While forming a tooth row for rotation prevention that protrudes on the circumference,
A twisting operation switch mounting structure comprising a waterproof and oil-proof sealing member surrounding a switch mounting hole formed on the panel side in parallel with the tooth row.