JPS584238Y2 - I/O unit for sequence controller - Google Patents

Description

[Detailed description of the invention] This 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 memo (IJB) that receives the input signals, and performs predetermined calculations based on preset values. and an arithmetic unit L-B with a built-in computer B2, etc., an output unit (C) that sends operation signals to external output devices based on the calculated values in this arithmetic unit B, and an operating power supply for each of these units. It consists of a power supply unit) D that supplies

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. For these reasons, the creator of this device developed a new sequence controller that allows the number of units to be increased or decreased, various parts including units are highly versatile, and can be used in many aspects such as ease of assembly and manufacturing cost. developed.

This idea was devised in conjunction with the development of the above-mentioned sequence controller, and was devised as an element to realize it more effectively.In particular, the internal structure that enables the fixation of the printed circuit board inserted into the input/output crab knit and its smooth insertion was devised. The illustrative embodiments are described in detail below.

FIG. 2 is a perspective view showing the assembled state of the sequence controller according to this invention. A divided base block 2 that is engaged and placed side by side, a motherboard 3 and a space cover 4 that are made up of a printed circuit board that is placed on the top 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 in the same way as each of these units 5.6. (In-out crab knit) 7 etc. are the main components.

Among these, the base block 2 has bent ends 8 on both sides of the frame,
A retaining protrusion 10 is fitted so as to be held between the frames 8 and 8 and protrudes from both end faces of the frame.
They are fixed in engagement with engagement holes 9, 9 drilled in each.

The upper surface of both ends of the base block 2 itself is higher by a certain dimension than the center part, and a groove-shaped recess 11 is formed in the middle position.
, 11 are formed, and the mounting protrusions 12 at both ends of each input/output 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.

Figure 3 is an exploded perspective view showing the structure of the popular crab knit 7.
13 is a picture-shaped case formed into a hollow rectangular parallelepiped, and inside it is an input/output circuit (interface circuit).
A printed circuit board 14 is fixedly housed therein, and a cover 15 for closing is attached to the opening of the case 13.

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 22 of the substrate 14 protrudes.

Reference numeral 23 indicates an indicator lamp consisting of a number of light emitting diodes, which are arranged in a row in a number corresponding to the number of operating circuits at the upper end of the board 14 in line with the upper connection end 22, and are used to check whether each circuit is operating normally. This is indicated by blinking.

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, which is partitioned into multiple series by partition walls so as to accommodate all the lamps 23 individually within the case. A through hole 27 is bored.

The lamp 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 longitudinal cross-sectional view showing the internal structure of the handmade crab knit 7 and its assembled state, and the board 14 has an external shape that matches the internal shape of the case 13 as shown in FIG. There is.

Furthermore, 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 22 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 these bosses function as spacers to determine the right side space (gap) when the board 14 is accommodated. It also serves as a fixing part when fixing the board 14 to this boss 30 through screws.

In this way, the board 14 is naturally positioned in the vertical and horizontal directions along the direction of the board 14 at the same time as being housed in the case 13 due to the internal shape of the case 13 and the corresponding shape of itself. As a practical 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 the top, 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. It is fixed to 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.

Next, the method of inserting the board 14 into the case 13 and the internal structure for smoothly inserting the board 14 will be explained. FIG. 5 is a sectional view showing the inserted state of the board 14. It is inserted into the slit 29 at the bottom of the box-shaped recess 20, and then the lower connecting end 21 at the other end of the board 14 is inserted.
While pushing and swinging along the bottom inner surface of the case 13, insert it so as to place or press it on the boss 30.

With this insertion, the end of the lower connection end 21 is in a position that almost coincides with the inner surface of the bottom of the case 13, but even if it is pulled back toward the bottom, the end of the lower connection end 21 is placed in the position of the board 14 so that it does not come out of the connector insertion hole 17. The other circumferential surface of the lower end is shaped to abut against the inner circumferential bottom surface of the case.

FIG. 6 shows that when inserting the board 14 as described above, the insertion work is carried out smoothly and the slit 29 allows the board 14 to be inserted.
FIG. 6 is an enlarged cross-sectional view showing a structure that enables more accurate positioning of the upper connecting end 22 side of 4 in the left-right direction (vertical direction in FIGS. 5 and 6).

As shown in the figure, the minimum width of the slit 29 is the minimum width necessary to insert the upper connection end 22 of the board 14, that is, the minimum width of the slit 29
However, since this alone makes it impossible to insert the substrate 14 in an inclined state by the method shown in FIG. chamfered according to the maximum angle of inclination when inserted.

As described above, according to this invention, the board 14 is connected to the case 13.
When housed in the case 13, its outer circumferential shape and the inner circumferential shape of the case 13 regulate the position along the board surface, and the positioning in the direction perpendicular to the board surface is
At least on the upper end side, the above-mentioned slit allows the insertion to be performed smoothly.

Therefore, as mentioned above, it is sufficient to fix the board 14 in the case with a single screw at the boss 30a near the middle part on the lower end side.

[Brief explanation of drawings]

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 and operation system of the sequence controller. Fig. 4 is a front sectional view showing the assembled state of the input/output crab knit, Fig. 5 is a sectional view showing how to assemble the main parts of the unit, and Fig. 6 A and B are both units. FIG. 3 is an enlarged cross-sectional view of a slit portion showing a structure for smoothly inserting a substrate therein. 1... Frame, 2... Base block, 3... Motherboard, 4... Space cover, 5... Power supply unit, 6... ...
...Arithmetic unit, 7...Input/output crab unit (input or output unit), 8...Bent end, 9.
...Engagement hole, 10...Engagement protrusion, 11.
... recess, 12 ... mounting protrusion, 13.
...Case, 14...Board, 15...
...Cover, 16...Connector, 17...
...Connector insertion hole, 18...Board connector, 19...Terminal block, 20...Box-shaped recess, 21...Bottom connection end, 22...
...Top connection end, 23...Indication lamp, 2
4... Display board, 25... Display section, 26
... Lamp case, 27.28 ... Through hole, 29 ... Slit, 29 a, 29 b
・・・・・・Slit surface, 30, 30 a・・・・・・
Boss, 31... Screw hole, 32.33...
・Terminal fittings.

Claims (1)

[Scope of utility model registration request] A base part has connection ends with connectors on the upper and lower sides and printed wiring is applied thereto, and this base part is housed inside, and a recess for connector insertion is provided at the upper part, and the upper connection end of the board is inserted into the recess. In a structure consisting of a case provided with a slit, the substrate is formed into a shape that fits the inner circumferential surface of the case, the minimum width of the slit in the case matches the thickness of the substrate, and at least one of the top and bottom surfaces of the slit is An entry/exit crab knit for sequence controllers, which has one slit surface chamfered according to the angle of inclination when inserting the board.