JP2866496B2 - Rail mounting equipment for electrical equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rail mounting device for electrical equipment for mounting electrical equipment on a DIN standard rail.

[0002]

2. Description of the Related Art There are various types of devices for mounting an electric device on a DIN rail. The device is roughly classified into a device having a spring with a coil spring mounted on a lever, and a device having an elastic piece integrally formed with the lever. Some have. FIG. 8 shows a conventional example in which a groove 2 is formed over the entire length of the bottom surface of an electric device main body (hereinafter, referred to as a main body) 1.
Is fitted on a DIN standard rail 3 to attach the main body 1 to the rail 3. The rail 3 has a substantially U-shaped cross section, and has locking pieces 4 formed on both sides over the entire length toward the outside.

[0003] On one side of the groove 2 of the main body 1, an engaging piece 5 for engaging with the locking piece 4 of the rail 3 is formed. On the other side of the groove 2, a lever 6 'is slidably mounted in a direction crossing the groove 2. A coil spring 7 is interposed in the center of the lever 6 ', and the lever 6'
Side is always biased. Engagement claw 10 at the tip of lever 6 '
Has a substantially triangular cross section, an inclined surface 8 is formed on the engaging claw 10, and a hole 9 for inserting the tip of a driver is provided in a base protruding from the main body 1.

In the lever 6 ', when the main body 1 is mounted on the rail 3, one of the locking pieces 4 is fitted on the engaging piece 5 and the main body 1 is pressed against the rail 3 as it is. The stop piece 4 slides on the inclined surface 8 of the engaging claw 10 of the lever 6,
The lever 6 ′ is pushed outward, and then the lever 6 ′ is returned. The engaging claw 10 at the tip of the lever 6 ′ locks the locking piece 4 of the rail 3, and the main body 1 is attached to the rail 3. Can be

In any of the above-mentioned conventional example and the case where the elastic piece integrally formed with another lever has a spring force, when removing the main body 1 from the rail 3, the lever 3 is engaged with the driver D or the like. It is necessary to always apply a force with a driver D and pull the nail 10 to a position where the claw 10 does not engage with the locking piece 4. That is, when a person works, one hand must be attached to the main body 1 and the driver 1 must be removed with the other hand holding the driver D. In this case, FIG.
As shown in (1), in a device having a long body 1 and a plurality of levers 6 ', it is necessary to pull out the levers 6 with a driver D at the same time.

Therefore, when removing the main body from the rail, the lever is once locked at a position where it does not engage with the rail,
Another conventional example has been proposed in which the removal workability is improved, and even when a plurality of levers are provided, one person can work alone. FIG. 6 is a perspective view of another conventional example, in which a concave portion 11 is formed in a portion of the main body 1 on which the lever 6 is mounted, and a side end of the lever 6 is provided beside the concave portion 11. An engagement groove 12 for inserting and locking the stopper 6a (FIG. 7C) is formed. Protrusions 13 project from both sides on the base side of the lever 6, and the protrusions 13 abut the step 14 of the main body 1 to position the lever 6.

A rectangular opening 15 is provided at the center of the lever 6, and an elastic piece 16 having elasticity is formed in a substantially C-shape from a corner on the base side of the opening 15. Also,
A stopper 17 protrudes from the distal end of the opening 15 of the lever 6 so as to be located between the elastic pieces 16. Further, a substantially U-shaped projection 18 is provided so as to project from the bottom surface of the main body 1 in the opening 15.

First, the initial state when the main body 1 is mounted on the rail 3 is as shown in FIG. Body 1
When the rail 3 is fitted into the groove 2 and the body 1 is subjected to a force toward the rail 3, the locking piece 4 on one side of the rail 3 comes into contact with the inclined surface 8 of the engaging claw 10 of the lever 6, as shown in FIG. The lever 6 slides in the direction A shown in the figure, and shifts to the state shown in FIG.

At this time, since the resilient piece 16 has a C-shape, the resilient piece 16 resiliently contacts the projection 18a of the projection 18, and the resilient contact with the projection 18 causes the lever 6 to move through the resilient piece 16.
The elastic piece 16 bends so that a force is applied in the direction B in FIG. Further, when the main body 1 is pushed in, the engagement claws 1 of the lever 6 are pushed.
0 engages with the locking piece 4 of the rail 3, the lever 6 returns to the state shown in FIG. 7A by the spring force of the elastic piece 16, and the main body 1 is fixed to the rail 3.

Here, in the above-mentioned conventional mounting device, only these two states ((a) and (b) of FIG. 7) exist, and when the main body 1 is removed from the rail 3, a screwdriver is required. For example, the lever 6 is pulled to a position where the engaging claw 10 does not engage with the rail 3 and removed. Screwdriver to lever 6
7 (a) (set state) by a spring force.

However, a feature of this conventional example is that, in addition to these, a locked state shown in FIG. 7C is provided. That is, the operation itself of attaching the main body 1 to the rail 3 is the same as that of the related art, but when removing the main body 1, insert a screwdriver or the like into the hole 9 of the lever 6 and move the lever 6 to the A position.
When it is pulled in the direction, the protrusion 16a of the elastic piece 16
When the elastic piece 16 exceeds the protrusion 18a, the force in the direction B by the elastic piece 16 is released (the elastic piece 16 is not bent), and the elastic piece 16 is locked at the position determined by the stopper 17.

That is, as shown in FIG. 7 (c), when the stopper 17 contacts the inner surface of the projection 18, the projection 16a of the elastic piece 16 rides over the projection 18a of the projection 18 and Reference numeral 16 denotes a state where the projection 16 does not elastically contact the projection 18. Accordingly, in this locked state, the elastic piece 16 does not bend, that is, since no stress is applied to the elastic piece 16, even if this state is maintained for a long time, the elastic piece 16 may break or deform. You don't.

Furthermore, when attaching the detached main body 1 to the rail 3, if a force is applied by a finger in the direction B in the drawing, the projection 16a of the elastic piece 16 elastically contacts the projection 18, and this elastic contact causes The elastic piece 16 bends in the spreading direction, and the elastic piece 1
When the protruding portion 16a of FIG. 6 gets over the protruding portion 18a of the projection 18, the lever 6 is slid toward the groove 2 by the spring force of the elastic piece 16, and the state shown in FIG.

The lever 6 may be made of metal or synthetic resin, and the number of elastic pieces 16 may be one.

[0015]

However, in the above conventional example, the elastic piece 16 is formed to project inward from the base of the lever 6 in a direction opposite to the direction in which the lever 6 is pulled out. Problems. That is, when the lever 6 is removed from the rail 3, the lever 6 is pulled out. When the lever 6 is pulled out, that is, as shown in FIG.
When the lever 6 is pulled out from the state shown in FIG.
8, the operation can be performed with a low load.

When the lever 6 is returned, that is, as shown in FIG.
To return from the state of (c) to the state of (a), the elastic piece 16
Since the elastic piece 16 is expanded outward to allow the elastic member 16 to get over the projection 18, a large force is required. However, since the driver is used when pulling the lever 6 off the rail, there is no problem even with a high load. Conversely, when the lever 6 is returned, it is preferable to operate with a low load.

The present invention has been made in view of the above points, and has as its object to provide a rail mounting device for electric equipment, which is capable of mounting a lever on a rail with a low load.

[0018]

The present invention is characterized in that the elastic piece is formed to project in the same direction as the direction in which the lever is pulled out.

[0019]

The elastic piece is formed so as to protrude in the same direction as the direction in which the lever is pulled out, so that it can be operated with a low load when the lever is returned, and can be operated with an appropriate weight when the lever is pulled out. Have improved.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. The present invention is characterized in that the projecting direction of the lever 6 is formed opposite to that of the conventional example, and other components are the same as those of the conventional example, and members having the same functions are denoted by the same reference numerals. Is attached. 1 to 5, an elastic piece 16 having elasticity is integrally formed to project outward from a portion inside the lever 6 in a substantially C shape. That is, the direction in which the elastic piece 16 projects is the same as the direction in which the lever 6 is pulled out. In this embodiment, the engaging claw 10 of the lever 6 is formed at a central portion from the outside unlike the conventional one. The lever 6 is provided on the cover 1a of the electric device body 1.

FIG. 1 shows a state where the lever 6 is pulled out and removed from the rail, and FIG. 2 shows a state where the lever 6 is pushed and returned. In FIG. 1, the elastic piece 16 climbs over the protrusion 18, and the protrusion 16 a of the elastic piece 16 is located outside the protrusion 18 a of the protrusion 18. Here, when the lever 6 is pushed, the projection 16a of the elastic piece 16 gets over the projection 18a of the projection 18, but in this case, the elastic piece 16 pulls out the projection 18 so that a low load can be operated. it can.

When the lever 6 is pulled out from the state shown in FIG. 2, the elastic piece 16 gets over the projection 18. However, the projection 16a of the elastic piece 16 Since the elastic piece 16 is expanded, the lever 6 operates with a higher load than when the lever 6 is returned. However, since the driver is used when pulling the lever 6, there is no problem even with a high load.

[0023]

As described above, the present invention is characterized in that the elastic piece is formed so as to protrude in the same direction as the direction in which the lever is pulled out. Can be operated with an appropriate weight when pulling out, and there is an effect that operability can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a state in which a lever according to an embodiment of the present invention is pulled out.

FIG. 2 is a diagram showing a state where a lever is returned.

FIG. 3 is a bottom view of a cover of the electric device main body.

FIG. 4 is a cutaway front view.

FIG. 5 is a sectional view.

FIG. 6 is a perspective view of a conventional example viewed from a lower surface.

FIG. 7 is an operation explanatory diagram of a conventional example.

FIG. 8 is a perspective view of another conventional example viewed from the lower surface.

FIG. 9 is an operation explanatory diagram of another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric device main body 2 Groove 3 Rail 4 Locking piece 6 Lever 10 Engaging claw 16 Elastic piece 18 Projection

Claims (1)

(57) [Claims] 1. An electric device main body having a groove for fitting a rail having a substantially U-shaped cross section having locking pieces on both sides on one surface of an electric device main body, and engaging an engaging claw on one of the locking pieces of the rail. A rail mounting device for an electric device, wherein a lever for detachably attaching the electric device to the rail is provided on one surface side of the electric device main body so as to be slidable across the groove, and is urged by the rail when the electric device main body is mounted. The lever that slides outward from the electric device body is provided with an elastic piece that resiliently contacts a projection provided on a part of the electric device body and urges the lever inward. Is pulled out and slid,
When the lever engages with the elastic piece while it is located in the groove, the protrusion is located at a position where it does not elastically contact the elastic piece when the lever engages outside the groove. A rail mounting device for electrical equipment, wherein the elastic piece is formed to project in the same direction as the direction in which the lever is pulled out.