JPH0936555A - Control device mounting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly reliable control device mounting device improved into such a structure that even if there is an irregularity in the clamping amounts of fastening screws by clamping the fastening screws screwed into a buried adaptor in a somewhat excessive manner or the like when a control device is mounted to a panel, such as a control panel, the pawls of the adaptor and engaging grooves formed in the side surface of a case for the control device are prevented from falling off and the device can be fixed on the panel with good stability. SOLUTION: A control device mounting device is one of a structure, wherein the wall of a panel 2 is inserted between a front flange part of a control device 1 and a frame-shaped buried adaptor 3 with hook pawls, which is fitted into the outer periphery of a case main body from the back of a case, has the hook pawls formed on the side surface of the case and is made to engage with engaging grooves 1a formed in the side surface of the case, and the points of fastening screws 4 screwed into the peripheral edges of the adaptor 3 are pressed to the rear of the panel 2 to fix the device 1 on the panel. Elastic pads 5 are respectively supported movably on the points of the screws 4 as interference members for absorbing an irregularity in said fastening screw clamping amounts, the irregularity in the clamping amounts of the fastening screws is absorbed by the deflection of the pads 5 and the control device 1 is fixed on the panel with good stability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device mounting device for fixing a control device to a panel surface such as a control panel or a switchboard in an embedded manner.

[0002]

2. Description of the Related Art First, a conventional structure of a control device mounting apparatus to which the present invention is applied will be described with reference to FIGS. 3 and 4, 1 is a control device such as a timer counter, 2 is a panel of a control panel for mounting the control device, 3 is an embedded adapter as a mounting device, and 4 is a fastening screw. Here, the embedded adapter 3 is a frame-shaped frame structure (resin molded product) that is fitted from the back to the outer periphery of the main body case of the control device 1.
The fastening screw 4 is screwed so as to penetrate therethrough at several points on the periphery thereof. Further, the embedded adapter 3 is provided with at least two upper and lower sides of a hook piece 3a having an arm-like claw protruding rearward, and a hook claw 3b having a triangular cross section which is formed so as to protrude to the inner surface side of the hook piece 3a. The wavy locking groove 1a (the groove cross section of which has a triangular shape similar to that of the ratchet tooth row) formed on the side surface of the case is hooked and locked.

In order to mount the control device 1 on the panel 2 of the control panel, first, the control device 1 is inserted from the front into the mounting hole opened on the wall surface of the panel 2, and the front flange portion 1 thereof is attached.
Push it in until b hits the wall surface of panel 2. Next, the embedded adapter 3 is mounted on the outer periphery of the case of the control device 1 from the inside of the board to sandwich the wall of the panel 2 between the front flange portion 1b and the embedded adapter 3, and at the same time, the hook piece 3a.
The hook claw 3b is hooked on the locking groove 1a on the main body case side, and the control device 1 is temporarily fixed in this state. Next, the fastening screw 4 is screwed in and the tip thereof is abutted against the wall surface of the panel 2. As a result, the reaction force due to the tightening of the fastening screw 4 is applied in the direction of pulling the case of the control device 1 rearward through the hook claws of the embedded adapter 3, and the control device 1 of the panel 2 via the front flange portion 1b. Fixed on the surface.

[0004]

By the way, in the mounting device having the above structure, the following problems occur when the control device 1 is mounted on the panel 2. That is, as described above, after the control device 1 is temporarily fixed to the panel 2 via the embedded adapter 3, when the fastening screw 4 is screwed and fixed, the operator tries to firmly fix the control device 1 and the fastening screw is When 4 is excessively tightened more than necessary, the hook piece 3a of the embedded adapter 3 bends due to the reaction force, and the hook claw 3b is disengaged from the locking groove 1a formed on the side surface of the case of the control device 1. In this case, the hook piece 3a may be bent excessively and may be broken.

The present invention has been made in view of the above points, and an object thereof is to solve the above-mentioned problems, and when mounting a control device to a panel, excessively tighten a fastening screw screwed into an embedded adapter. Even if the tightening amount varies,
An object of the present invention is to provide a highly reliable mounting device for a control device, which is improved so that the claw of the adapter and the locking groove of the device case are prevented from coming off and can be fixed stably.

[0006]

In order to achieve the above object, in the mounting device of the present invention, the fastening screw that is screwed into the embedded adapter and abuts against the wall surface of the mounting panel is attached to the tip of the fastening screw. An interference member that absorbs the variation in the tightening amount shall be provided. Here, as the interference member, it is preferable to specifically use a pad made of an elastic material, and the elastic material pad can be loosely fitted and supported on the tip of the fastening screw.

[0007]

According to the above construction, when the control device is mounted on the panel such as the control panel, the embedded adapter is fitted on the outer periphery of the case of the control device and the hook claw of the adapter is formed on the case side of the control device. When the fastening screw is screwed in while locked in the stop groove, the elastic pad as an interference member attached to the tip hits the wall surface of the panel, and when the fastening screw is further tightened from here, the elastic pad bends in the compression direction,
The reaction force pulls the case of the control device rearward through the hook claws of the embedded adapter to fix it in place. In this case, even if there is variation in the tightening amount such as when the worker tightens the fastening screw excessively, the variation in the tightening amount is absorbed by the elastic deformation of the elastic pad. Since no excessive force is applied to the control device, it is possible to stably fix the control device to the panel while avoiding troubles such as disengagement of claws and breakage of hook pieces.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the drawings of the embodiment, the same members corresponding to FIGS. 3 and 4 are denoted by the same reference numerals. That is, in the illustrated embodiment, the elastic pad 5 made of rubber or the like is used as an interference member at the tip of the fastening screw 4 screwed into the embedded adapter 3.
Is loosely fitted and supported.

With this configuration, when the control device 1 is attached to the panel 2 such as a control panel, the elastic pad 5 described above abuts against the wall surface of the panel 2 and is screwed as shown in FIG. Further, in this state, the elastic pad 5 is bent in the compression direction by the tightening force of the fastening screw 4, and the reaction force is applied to the case of the control device 1 via the fastening screw 4 and the hook piece 3a of the embedded adapter 3, The force pulls the control device 1 rearward and fixes it at the mounting position.

As a result, even if the tightening amount of the tightening screw 4 varies due to excessive tightening of the tightening screw 4,
Since the amount of variation is absorbed as the bending deformation of the elastic pad 5, there is no possibility that an excessive force is applied to the hook piece 3a of the embedded adapter 3, and therefore the hook claw 3b is locked by the locking groove 1a.
It is possible to firmly and stably fix the control device to the panel 2 while avoiding a trouble such as disengagement from the hook or the hook piece 3a being broken.

By mounting the elastic pad 5 on the tip of the fastening screw 4 in advance, the mounting work can be facilitated, and the fastening screw 4 can be further pressed while the elastic pad 4 is pressed against the wall surface of the panel 2. It has advantages such as being able to tighten.

[0012]

As described above, according to the configuration of the present invention, the tightening amount varies due to excessive tightening of screws in the screw tightening work when mounting the control device on the panel surface of the control panel or the like. Even if there is, the variation can be absorbed by the bending of the elastic pad serving as the interference member, which avoids the trouble that the embedded adapter and the control device case are disengaged from each other and the control device is moved to the panel. It can be stably fixed, the problems of the conventional device can be solved, and the mounting workability and the reliability can be improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention showing a mounting state of a control device.

2 is a configuration diagram of an embedded adapter in FIG.
(A) is a front view, (b) is a side view of a partial cross section

FIG. 3 is a block diagram of a conventional control device mounting device.

FIG. 4 is an enlarged cross-sectional view of a main part in FIG.

[Explanation of symbols]

 1 Control device 1a Locking groove 1b Front flange part 2 Panel 3 Embedded adapter 3a Hook piece 3b Hook claw 4 Fastening screw 5 Elastic pad (interference member)

Claims (3)

[Claims] 1. A mounting device for fixing a control device to a panel surface of a control panel or the like in an embedded manner. The control device body is fitted into the front flange portion of the control device body and the outer periphery of the body case from behind to form a hook claw on the case surface. The panel wall is sandwiched from the front and back with the frame-shaped hook claw embedded adapter that is engaged with the locking groove, and the tip of the fastening screw that is screwed to the peripheral edge of the embedded adapter is pressed against the back surface of the panel for control. An apparatus for fixing a device, wherein an interference member that absorbs a variation in a tightening amount of the fastening screw is provided at a tip of the fastening screw. 2. The mounting device according to claim 1, wherein the interference member is a pad made of an elastic material. 3. The mounting device according to claim 2, wherein the elastic material pad is loosely fitted and supported on the tip of the fastening screw.