JPS6011690Y2 - central control unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the unit structure of a central control device, generally a low pressure control center.

Since this type of unit is generally used by fitting a plurality of units of the same shape into a cabinet, it is desirable that the structure be simple, easy to assemble, and suitable for mass production.

The configuration of a unit suitable for mass production, that is, sharing the main parts of the unit, is a factor that greatly leads to stabilization of quality and cost reduction, but conventional units have few shared parts and use a wide variety of constituent materials. was needed.

For example, each type of electromagnetic switch requires mounting materials for the electromagnetic switch, and the size of the handle that is attached to the unit to pull it out of the cabinet differs depending on the size of the unit. Due to the welding work performed on the construction of the unit itself, it was quite difficult to maintain a consistent quality of the unit.

This will be explained in detail with reference to the drawings as follows.

In Figures 1 to 4, reference numeral 1 denotes a thin steel mounting plate, which is placed against the frame frame 2 and at least its four corners A99 and H2 are welded to obtain strength as a unit. ing.

Reference numerals 3 and 3' denote handles for drawing out the unit, which are made of round steel bars for ease of operation, but since it is difficult to screw both ends of the handles to the mounting plate 1, Welding is also carried out at both end portions of E, H, G, and J.

Furthermore, supports 4a and 4b are attached to the frame frame 2 to serve as guides when the unit is attached and detached, but they must be welded to attach them.

symbol or its welded part.

On the other hand, the shape of the unit depends on the object to be controlled, such as a reversible unit, a control transformer unit, a human-delta starting unit,
Like units for other objects, various types were required, and their shapes differed depending on the purpose.

Figures 1 and 3 illustrate this.

Various types of instruments 5 to 16 are attached to the front side of the steel plate 1, for example, as shown by the dashed lines, and a large number of attachment holes 17 are provided for attaching these instruments. .

As described above, in the conventional type, the size differs from unit to unit, and the number of welded parts is extremely large.

When a lot of welding work is performed on the mounting plate 1 made of a thin steel plate, the steel plate expands and contracts due to the heating and cooling of that part, causing distortion around the welded part, which may cause the original flat plate to become wavy.

If a resin molded part with a flat bottom plate, which will become an instrument, is attached without taking up the welding distortion, excessive force will be applied to the joint between the corrugated surface and the flat surface, which may damage the molded part.

For this reason, it is necessary to reduce the number of welded parts as much as possible.

Furthermore, since welding is performed manually, dimensional accuracy is inevitably reduced.

The present invention eliminates the above-mentioned drawbacks and provides a unit suitable for mass production.

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

In FIGS. 5 to 7, reference numeral 20 denotes a mounting plate made of a thin steel plate, and a plurality of holes 18 are provided on the front surface of the mounting plate.

This is to allow various types of equipment to be attached to one unit board.

The devices include circuit breakers, electromagnetic contactors, current transformers, thermal overcurrent relays, auxiliary relays, etc.
By selecting , you can install it in any location with bolts.

The left side plate 21 and the right side plate 22 are mounted on the mounting plate 20 with respect to the lower plate 23.
The left side plate and the right side plate can be the same.

For this connection, the left side plate 21 is provided with holes A to E on its side edge, and the right side plate 22 is also provided with similar holes A' to E'.

The mounting plate 20 is provided with holes F, G, F', and G', and the lower plate 23 is provided with holes H-J and H'-J', respectively. It is fastened and fixed to the mounting plate and lower plate with screws or rivets.

The lower plate 23 has, at the rear, a plug mounting surface 23a for mounting a plug terminal 24 that supplies power to the entire unit;
It has guide grooves 23b and 23c at the bottom to prevent vertical and horizontal vibration when the unit is pulled out, and is located at the bottom of the entire unit.

Mounting plate 20. Left side plate 21. By fixing them to the respective holes A-J, A' to J' provided in the right side plate 22 and the lower plate 23 with bolts, rivets, etc., a unit having openings generally upward and in the front can be formed.

FIG. 6 is a perspective view of FIG. 5 in an assembled state.

This unit does not have a handle.

Therefore, in order to insert this unit into a cabinet (not shown), the front bent portion 23d of the lower plate 23 is grasped by hand and inserted/removed.

On the other hand, a wiring breaker is first installed as a circuit protector on the mounting plate 20 of the unit, and then fuses, switches, and other equipment are installed. Generally, a unit door is provided on the front side of the unit door, and the circuit breaker is assembled so that the opening/closing operation handle of the wiring breaker protrudes from the front side through a portion of the unit door.

FIG. 7 is a longitudinal sectional view of a conventional configuration. Reference numeral 25 is a circuit breaker, reference numeral 26 is a mounting base, and reference numeral 27 is a unit door.

Since the mounting plate 20 to which various instruments are attached is fixedly provided (see Figures 1 to 4), when this is inserted into the cabinet, the dimension between the unit door 27 and the mounting plate 20 is If the wiring breaker 25 is not attached to A via the mounting base 26, a large gap will be created between the unit door 27 and the mounting plate 20, and dust will enter there.

Further, since various circuit breakers are used depending on the capacity of the load, the value of the X dimension shown in the drawings differs.

Therefore, various types of the seven dimensions of the mounting base 26 must be prepared to match the X dimension for wiring, so there are many types of parts, which is uneconomical from the point of view of standardization.

According to the present invention, in order to overcome the above-mentioned drawbacks, the mounting plate 20 is configured to move and hang in the front direction.

FIG. 8 is a modification of FIG. 6. That is, the mounting plate 20 is moved relative to the left side plate 21 and the right side plate 22, and the mounting plate 20 is fastened and fixed to the side plates 21 and 22 by, for example, taking dimension 8 on the front side and dimension C on the rear side. be.

For this purpose, the side plates 21 and 22 are provided with mounting portions, holes ', L' (K, L) in this embodiment, for moving the mounting plate 20 by an arbitrary dimension in the front-back direction and fastening it. .

As described above, according to the present invention, since the plate materials 20, 21, 22, and 23 of each part that make up the unit are divided into functional units, the lower plate 23, where compatibility when entering and exiting is important, can be shared by all units. Since the structure is simple, it can be easily assembled without welding.

In addition, since everything has a flat configuration, mass production and storage are convenient.

[Brief explanation of the drawing]

1 and 2 are a front view and a side view of a conventional unit, FIGS. 3 and 4 are a front view and a side view of a different conventional unit, and FIG. 5 is an exploded perspective view of a unit of the present invention. 6 is a perspective view of the assembled state shown in FIG. 5, FIG. 7 is a partially sectional side view for explanation, and FIG. 8 is a side view of a different embodiment. 1...Mounting plate, 2...Frame frame, 3
, 3'...Handle, 4a, 4b...Support, 5-16...Equipment to be attached, 17...
Mounting hole, 18...hole, 2o, curved, mounting plate, 21
...Left side board, 22...Right side board, 23.
...Lower plate, 23a...Plug mounting surface, 2
3b, 23c...Guide groove, 24...
Flag terminal, 25... Wiring breaker, 26.
...Mounting base, 27...Unit door.

Claims (1)

[Scope of utility model registration request] A mounting plate with a number of holes arbitrarily selected and used for mounting according to the equipment to be mounted, a left side plate and a right side plate that support both sides of this mounting plate, and the lower sides of these left side and right side plates. and a lower plate having a plug mounting surface at the rear and a guide groove at the bottom, and the plates are connected to each other to form an opening surface generally upward and in front, and the left and right plates are connected to each other, respectively. A unit of a central control device characterized by having a mounting portion for moving the mounting plate by an arbitrary dimension in the front-back direction to an arbitrary position and fastening and fixing the mounting plate.