JPH03805Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a control bus device, in particular a control bus system in which a plurality of control units are housed in a box in multiple stages, such as a control center which is disposed in the box and controls each of the control units. The present invention relates to a control bus device that serves as a bus for a control circuit common to the units and is provided with a branch connector to each control unit.

[Prior art]

A plurality of control units housed in multiple stages in a box, such as the control center described above, often have a control circuit common to each control unit, such as a control power supply circuit and an alarm circuit. Therefore, a control bus is used to simplify the crossover wiring between each control unit. In this case, the control center generally has a high packaging density, and it is desirable that the control bus bar, including the branch connector to the control unit, be small and require little space. Further, it is preferable that the branch portion be constructed of a plug-in connector that allows easy connection of the branch electric wire.

[Summary of the idea]

The present invention has been devised in view of the above-mentioned conventional problems, and its purpose is to provide a control bus device equipped with a branch connector suitable for a control center.

In order to achieve the above object, the present invention makes it possible to insert the branch connector in the longitudinal direction of the control busbar, that is, along the conductive strip arranged in the insulating case, so that the protrusion of the branch connector from the control busbar is prevented. The overall thickness of the control bus device including the branch part is made thinner, and a locking means that can be easily engaged and detached is provided between the branch connector housing and the insulating case to prevent them from falling off. do.

[Example of idea]

Hereinafter, preferred embodiments of the present invention will be described based on the drawings. FIG. 1 is a wiring diagram of a common control circuit of a control center. Reference numeral 10 denotes a control center, which is generally installed in multiple panels in a row. Each control center 10 is a representative control unit 1
It has a unit section 13, a vertical wiring section 14, a horizontal busbar section 15, and a general terminal block section 16, in which the terminals 2 are housed in multiple stacks. A vertical control bus 20 disposed along the unit section 13 is provided with a branch connector 21 corresponding to the control unit 12, from which a branch current 22 is branched. The vertical control busbars 20 of each control center 10 are connected at their terminal ends 23 with interpanel crossover electric wires 24. Generally, the termination section 23 is constructed identically to the branch connector 21.

2 to 5 are partial views showing an embodiment of the branch connector 21 of the vertical control bus 20. FIG.
The control bus 20 includes a guide 32 and first and second insulating cases 3 that hold a plurality of guides 32 in parallel.
0,31.

Branch tabs 32A are provided on the guide strip 32 at predetermined intervals. The branch tab 32A is formed in parallel with the guide strip by cutting and bending. The first insulating case 30 has a bottom wall 30A on the inner surface of which the guide strip 32 is closely juxtaposed, an end side wall 30B serving as a barrier on the side of the guide strip 32, and an intermediate side wall 30C.

The second insulating case 31 is the first insulating case 30
The upper surface wall 31A serves as a lid, and the inner surface thereof has guide strips 3 along the side walls 30B and 30C of the first insulating case.
Each pair of presser feet 31B has a total of 2 presser feet. An engaging hook 31C is formed at the tip of each presser leg 31B to engage with a groove 30D formed at the bottom of the side wall of the first insulating case.

By fitting with the first and second insulating cases 30 and 31, the guide strip 32 is pressed and fixed between the bottom wall 30A and the presser leg 31B. Further, a cylindrical space 35 with a rectangular cross section is formed between the upper surface of the guide strip 32 and the second insulating case 31 (FIG. 3).

The upper wall 31A of the second insulating case has an insertion hole 3 for a branch connector corresponding to the branch tab 32A of the conductor.
1D is provided.

Further, an engagement hole 31E is provided in front of the insertion hole 31D.
is provided. The branch connector 21 is composed of a housing 40 and contacts 41. The contactor 41 has an elastic piece 41A, and the housing 40
It is housed in the body part 40A of the body part 40A, and is prevented from coming off by a protrusion 40B provided inside the body part 40A. A shoulder portion 40C is formed to protrude from the rear upper part of the body portion 40A, and an engagement hook 4 is provided at the front end of the body portion 40A.
An elastic engagement arm 40D having 0E is formed.

The outer shape of the body portion 40A including the elastic engagement arm 40D is configured to fit within the cylindrical space 35 within the insulating case.

A method of plugging and connecting the branch connector 21 configured as described above will be described below. As shown in FIG. 5, first, the elastic engagement arm 40D is inserted into the upper wall 31A through the insertion hole 31D, and pushed in until the body portion 40A contacts the upper surface of the guide strip 32. At this time, the elastic engagement arm 40D is bent downward, and the branch current 22 connected to the contact 41 is bent at a large angle and extends to the outside of the insulating case 31. Next, the shoulder part 40
C, the housing 40 is moved along the upper surface of the guide strip 32 and connected to the branch tab 32A. As shown in FIG. 4, in the plug-in and connected state, the engagement hook 40E of the elastic engagement arm 40D engages with the engagement hole 31E, and the shoulder 40C abuts against the edge of the insertion hole 31D. Then, branch connector 21
is retained.

The branch connector 21 in the plug-connected state can be pulled out by operating the shoulder portion 40C while releasing the lock of the elastic engagement arm 40D.

[Effect of idea]

The device according to the present invention is constructed as described above, and most of the branch connector 21 in the plug-in connection state is housed within the control bus, with few protruding parts to the outside. Furthermore, since the insertion/connection direction of the branch connector 21 and the pull-out direction of the branch electric wire 22 are arranged in the same direction as the longitudinal direction of the control bus bar 20, the overall thickness is thin and the required space can be reduced. Thus, an easy implementation is obtained, especially along the control unit section 13 of the control center.

[Brief explanation of the drawing]

Fig. 1 is a wiring diagram of a common control circuit in a control center, Fig. 2 is a front view showing an embodiment of a control bus device equipped with a branch connector of the present invention, and Fig. 3 is a cross-section of the - line in Fig. 2. FIG. 4 is a vertical cross-sectional view taken along the line -- in FIG. 2, and FIG. 5 is a vertical cross-sectional view corresponding to FIG. 4 showing the branch connector in the middle of insertion and connection. In the figure, 20 is a control bus bar, 31 is a second insulating case, 31D is an insertion hole, 31E is an engagement hole, 32 is a guide, 32A is a branch tab, 21 is a branch connector, 4
0 is the connector housing, 40A is the body part, 40
C is a shoulder, 40D is an elastic locking arm, and 41 is a contact. Note that in the figures, the same reference numerals indicate the same parts.

Claims (1)

[Scope of utility model registration request] A plurality of conductors are arranged in a cylindrical space formed in the insulating case, and a control bus bar is formed by cutting and raising branch tabs at predetermined intervals in the middle of the conductors, and the upper surface of the insulating case. The wall is provided with an insertion hole for inserting the branch connector corresponding to the branch tab, and an engagement hole in front of the insertion hole, and the housing of the branch connector includes at least a body portion for accommodating the contact, and an engagement hole in front of the insertion hole for inserting the branch connector. It has an elastic engagement arm protruding forward from the body, and when the branch connector is inserted from the insertion hole toward the branch tab, the elastic engagement arm enters the engagement hole from within the cylindrical space. A control bus device equipped with a branch connector that is locked and prevented from coming off.