JPS5835388B2 - I/O unit for sequence controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an input/output crab knit for a sequence controller.

As shown in the block diagram of Figure 1, a sequence controller generally includes an input unit (A) that receives input signals from various external devices, a memory (B1), and a memory (B1) that receives the input signals and performs predetermined calculations based on preset values. computer B
A calculation unit with built-in 2 etc.) B and this calculation unit) B
It is comprised of an output unit C that sends operation signals to external output devices based on calculated values within the unit, and a power supply unit D that supplies operating power to each of these units.

However, in conventional sequence controllers that have these elements, the size and quantity of each unit vary depending on its control ability, etc., and it is impossible to increase or decrease the number of units, and the units themselves lack versatility. Therefore, the inventors of the present invention have developed a new sequence controller that allows the number of units to be increased or decreased, various parts including the units are highly versatile, and has advantages in many aspects such as ease of assembly and manufacturing cost. was developed.

The present invention was developed in conjunction with the development of the above-mentioned sequence controller, and was developed as an element for more effectively realizing the sequence controller, and will be described in detail below with reference to embodiments shown in the drawings.

FIG. 2 is a perspective view showing the assembled state of the sequence controller according to the present invention. A space cover 4 covering a motherboard 3 consisting of a divided base block 2 and a printed circuit board placed on the upper surface of the base block.
, a power supply unit 5 and a calculation unit 6 placed on the base block 2 via the space cover 4, and an input or output unit placed side by side on the base block 2 similarly to each of these units 5 and 6. (In-out crab knit) 7 etc. are the main components.

Among these, the base flock 2 has bent ends 8 on both sides of the frame,
Engagement protrusions 10 are fitted so as to be sandwiched between the frames 8 and 8, and protrude from both end surfaces of the frames.
They are fixed by being engaged with engagement holes 9, 9 drilled in each.

The base block 2 itself has an upper surface at both ends that is a certain dimension higher than the center, and a groove-shaped recess 11 at the intermediate position.
11 is formed, and the mounting protrusions 12 at both ends of each entry/exit crab knit 7 are accommodated therein and are fastened and fixed with screws.

The power supply unit 5 and the arithmetic unit 6 are also fixed onto the base block 2 using the same mounting structure as the input/output crab unit 7, but their width is generally larger than that of the input/output crab unit 7, such as the size of the built-in parts, etc., as shown in the figure. It is widened accordingly.

In this way, the power supply unit 5, the arithmetic unit 6, and the required number of input/output crab units 7 are successively placed on the frame 1 in sequence, and the input/output crab units 7 and the same are attached as shown in the figure. Since the base block 2 is a product of the same shape with a uniform width, it is possible to increase or decrease the number of input and output crab knits 7 according to the required number.

FIG. 3 is an exploded perspective view showing the structure of the input/output crab knit 7.
Reference numeral 13 denotes a planar case formed into a rectangular parallelepiped with a hollow interior. A board 14 on which an input/output circuit (interface circuit) is printed is fixedly housed inside the case 13, and the opening of the case 13 is closed. cover 15 is attached and shaken.

Reference numeral 16 denotes the aforementioned motherboard 3 inserted so as to sandwich the lower connection end 21 of the board 14 housed in the case 13.
A connector insertion hole 17 is formed at the lower end of the case 13 into which the connector 16 is inserted.

18 is a board connector which is similarly inserted into the upper end of the board 14 in the case 13 and connected to the printed circuit at the upper connection end 22 of the board 14. On the top of the board connector, a terminal block 19 is integrally and mutually connected to the circuit. Installed with connections made.

20 is the case 1 in which the board connector 18 is inserted.
3, from which the upper connection end n of the substrate 14 protrudes.

Reference numeral 23 denotes an indicator lamp consisting of a number of light emitting diodes arranged in parallel with the upper connection end 22 at the upper end of the board 14, corresponding to the number of operating circuits, and blinks to indicate whether each circuit is operating normally. This is shown by.

In contrast to the indicator lamp 23, a display board 24 is attached to the upper end surface of the case 13 to receive the flashing light of the indicator lamp 23 and display it on the outside of the case. The same number of sections 25 as the lamps are arranged in parallel.

Reference numeral 26 denotes a lamp case for preventing the light scattering of the indicator lamps 23. The inside of the case is partitioned into multiple partitions by partition walls so as to accommodate all the lamps 23 individually, and the upper end surface thereof has a lamp case corresponding to the number of lamps. A through hole 27 is bored.

The rung case 26 is fixed to the substrate 14 with each display lamp 23 housed therein.

28 is a through hole through which the lamp case 26 faces.

FIG. 4 is a front vertical sectional view showing the internal structure of the input/output crab knit 7 and its assembled state, and the outer shape of the board 14 is formed to match the internal shape of the case 13 as shown in FIG. .

Further, a slit 29 corresponding to the thickness and width of the upper connection end 22 of the board 14 is formed at the bottom of the box-shaped recess 20 into which the board connector 18 is inserted, and the upper end surface of the upper connection end n is inserted into this slit 29 at its deepest point. When fully inserted, the lower connecting end 21 is at almost the same height as the upper surface of the case 13 or slightly lower than it, and at this time, the lower connecting end 21 is also shaped so as not to protrude below the lower surface of the case 13.

Reference numeral 30 indicates a plurality of bosses protruding from appropriate positions on the right side wall of the case, and in addition to functioning as a spacer to determine the space (gap) on the right side when the board 14 is accommodated, they also serve as spacers for determining the space (gap) on the right side when the board 14 is accommodated. Board 1 to this boss 30 through
It also serves as a fixing part when fixing 4.

In this way, the board 14 is naturally positioned vertically and horizontally along the direction of the board 14 while being housed in the case 13 due to the internal shape of the case 13 and its own shape corresponding thereto. As a fixing means to the case 13, it is sufficient to screw only the boss 30a near the center of the lower part.

As shown in FIG. 4, the connector 16 has a structure in which terminal fittings 32 and 32 are embedded so that the board 14, which is inserted from above, is pressed against both sides with a certain elasticity, and the lower end of the terminal fittings 32 and 32 are pressed against the board 14, which is inserted from the top, with a certain elasticity. It is fixed so that it can be connected to printed wiring.

Further, the upper board connector 18 is integrated with the terminal block 19, and the upper connection end 22 of the board 14 is also connected therein as described above.
Terminal fitting 3 that is pressed under a certain elasticity when inserted.
3 is inserted.

As described above, according to the present invention, the upper and lower connection ends 21 and 22 of the board 14 do not protrude from the upper and lower end surfaces of the case, and the connectors are inserted into the case and connected to the printed circuit (metal pattern) of the board 14. Because of the connected structure, the protruding board will not be soiled or damaged by touching the protruding board or other objects while handling the input/output crab knit, and there will be no contact failure due to such contact, and it is also extremely dust-proof. ing.

Therefore, the handling of the board 14 housed in the case 13, such as transportation and inventory management, which has not been done often in the past, is realized or becomes very simple.

The above-described structure has many other effects such as highly accurate positioning of the connector.

[Brief explanation of the drawing]

Figure 1 is an explanatory block diagram showing the basic components and operating system of the sequence controller, Figure 2 is a partially cutaway perspective view showing the assembled structure of the sequence controller, and Figure 3 is the component parts of the input/output crab unit and their FIG. 4 is an exploded perspective view showing the internal structure, and FIG. 4 is a front vertical sectional view showing the assembled state of the input/output crab knit. 1...Frame, 2...Base flock, 3...
Motherboard, 4... Space cover, 5... Power supply unit, 6... Arithmetic unit, 7... Input/output crab knit (input or output unit), 8... Bent end, 9
...Engagement hole, 10...Engagement protrusion, 11...Recessed part,
12... Mounting protrusion, 13... Case, 14...
Board, 15...Cover 16...Connector 17.
... Connector insertion hole, 18 ... Board connector, 1
9...Terminal block, 20...Box-shaped recess, 21...
- Lower connecting end, 22... Upper connecting end, 23... Display lamp, 24... Display board, 25... Display section, 26.
...Lamp case, 27, 28...Through hole, 29...
Slit, 30.30a... Boss, 31... Screw hole, 32.33... Terminal fitting.

Claims (1)

[Claims] 1. A planar case, a printed circuit board housed in the planar case, a cover that closes the opening of the case, and a plug connection to the lower connection end of the board accommodated in the case. It consists of a board connector integrated with a terminal block that is inserted and connected to the upper connection end of the board, similar to the connector that is connected to the board, and the bottom surface of the case is provided with a connector insertion hole that faces the lower connection end of the board and inserts the connector. A box-shaped recess is formed on the top surface of the case to allow the upper connection end to protrude inside and insert the board connector, and the part of the board other than the upper and lower connection ends is adapted to be positioned in contact with the inner circumferential wall of the case. Input/output crab knit for sequence controllers formed into a shape.