JP2002218609A - Metal branch for duct for signal line of control panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a duct capable of protecting a control loop when signal lines for transmitting from control units are removed, and of integrating components for a panel. SOLUTION: A transmission control panel is divided into several layers and chambers of the control units. The signal transmission lines from the control units 6 stored in the chambers are assembled and stored in the metal duct 4 for protecting the signal lines for from interference of noise. In the metal duct 4, a board 13 equipped with a connector 14 for branching signals to the control unit 6 is disposed inside the metal duct 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal duct for accommodating a circuit board provided with a connector for protecting a transmission signal line subject to noise interference and a signal branch.

[0002]

2. Description of the Related Art The structure of a conventional control panel is shown in FIGS. In the figure, reference numeral 1 denotes a box of a control panel, in which a control unit 6 is housed in a control unit room divided into several layers by partition walls 7. A metal duct main body 4 for transmission is vertically arranged in the box 1 so as to penetrate each control unit chamber, and is attached to a support base 2 via an insulating support bush 3. The lead wire 8 led out from the control unit 6 housed in the control unit room is housed in the transmission metal duct main body 4, covered with a metal cover 5, and physically protected and electromagnetically shielded. . The metal duct body and the metal cover form a metal duct.
In the figure, 9 is a ground wire electrically connected to the transmission metal duct main body 4, 10 is a ground bar to which the ground wire 9 is connected,
Reference numeral 15 denotes a drop-in port for pulling in a signal line from outside the box 1. In FIG. 5, reference numeral 12 denotes a ground common line.

As shown in FIG. 6, the wiring path of the transmission signal line in such a conventional control panel is
Each control unit 6 is wired in series.
The socket 16 has been drawn out from the outlet of the transmission metal duct body 4.

[0004]

However, in the prior art, when the wiring to one control unit 6 is removed,
Since the control loop breaks, the connector 16 must be connected.

There is another problem that the length of the transmission signal line cannot be unified due to the size of the control unit 6.

The present invention has been made in order to solve such a problem, and provides a duct capable of protecting a control loop when removing a transmission signal line from a control unit and consolidating components for a panel. The purpose is to do.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a control unit room in which a transmission control panel is divided into several layers, and a transmission unit for transmitting data from each control unit housed in the control unit room. In a metal duct that collects and stores signal lines and protects transmission signal lines from noise interference, a board equipped with a connector for signal branching to each control unit is arranged inside this metal duct. And

[0008] By the above means, even if one control unit is taken out, the control loop circuit operates without any problem because the circuit of the connector conducts. In addition, the components for the panel can be integrated.

[0009]

Embodiments of the present invention will be described below.

FIG. 1 is a layout view of a transmission metal duct of the present invention, FIGS. 2 (a), 2 (b) and 2 (c) are partial detailed views of FIG.
FIG. 3 is a transmission signal line path diagram of FIG.

In these figures, 1 is a box, 2 is a base for supporting a metal duct for transmission, 3 is a bush for supporting the metal duct for transmission, and insulates the metal duct main body 4 from the control panel box 1. I support it.

Reference numeral 5 denotes a cover of the transmission metal duct main body 4, which is attached to the transmission metal duct main body 4 with a tapping screw 11. The metal duct main body 4 and the cover 5 form a metal duct.

A control unit room divided into several layers by a partition 7 is provided inside the box 1, and the control unit 6 is housed in the control unit room.

In the present invention, as shown in FIG. 2 (c), a board 13 is attached to the inside of a metal duct composed of a metal duct body 4 and a metal cover 5 by an insulating support bush 3, and a signal line is branched to the board 13. Connector 14 is mounted.

The substrate 13 has the following configuration.
That is, as shown in FIG. 3, the two signal line branching connectors 14, 14 into which the primary socket 14 a and the secondary socket 14 b are inserted are made conductive, and the soldering output terminal 17 to the control unit 6 is Are also conducted. From the soldering output terminal 17 to the control unit 6,
A lead wire 8 is provided, and a socket 16 is arranged at the tip thereof. Therefore, even if the control unit 6 is taken out by removing the socket 16, the control loop can be maintained in an operating state by the board 13 without any problem.

The transmission signal is transmitted through a transmission line to the entrance 1 at the bottom of the panel.
From the transmission metal duct 5 through the inside of the transmission metal duct main body 4, as shown in FIG. 3, the signal is branched by the signal line branching connector 14 of the board 13 and transmitted to the control unit 6 in each control unit room by the lead wire 8.

The noise absorbed by the transmission metal duct main body 4 is grounded from the uppermost transmission metal duct main body 4 to a dedicated third-class grounding bar 10 via a ground wire 9.

[0018]

As described above, according to the present invention, the board provided with the connector for branching the transmission signal line is disposed in the metal duct for each control unit room. Control circuit operates without any problem. As a result, there is an economic effect by protecting the transmission loop when each control unit is separated and by consolidating each panel component.

[Brief description of the drawings]

FIG. 1 is a layout view showing one embodiment of a transmission metal duct mounting structure of the present invention.

FIGS. 2A and 2B are partial detailed views of FIG. 1, wherein FIG. 2A is an enlarged front view, FIG. 2B is an enlarged cross-sectional view of a metal duct portion, and FIG.

FIG. 3 is a transmission signal line path diagram of FIG. 1;

FIG. 4 is a conventional structural view.

FIG. 5 is a conventional structural view.

FIG. 6 is a conventional transmission signal line path diagram.

[Explanation of symbols]

1: Box 2: Transmission metal duct support base 3: Insulation support bush 4: Transmission metal duct main body 5: Cover, 6: Control unit, 7: Partition, 8: Lead wire, 9:
Ground wire, 10: ground bar, 11: tapping screw,
12: ground common line, 13: board, 14: signal line branching connector, 14a: primary side socket, 14b: secondary side socket, 15: drop-in port, 16: socket, 17: soldering output terminal

Claims (1)

[Claims] 1. A control unit room is provided by dividing a transmission control panel into several layers, transmission signal lines from respective control units housed in the control unit room are collectively housed, and the transmission signal lines are noise-free. A metal duct for control line branching of a control panel, wherein a board provided with a connector for signal branching to each control unit is arranged inside the metal duct for protection from obstacles.