JPH0334932Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a unit mounting device for fixing a module unit of a program controller to a base unit.

[Conventional technology]

FIG. 4 is a perspective view of the program controller. In the figure, 1 is the power supply unit, 2 is the CPU
Units 3 are modular units such as input/output units (hereinafter referred to as units 2), and these units 2 are attached to a base unit 4. Conventionally, as a mounting device for this type of unit,
It was as shown in FIGS. 5 and 6. Each unit 2 has a hollow box shape, and a bolt 6 with a thread 5 cut at the tip is inserted through a hole 7 on the top surface of the unit, and then passed through holes 9 and 10 made in the bottom surface of the unit and the seat 8. The unit is screwed into the screw hole of the base unit 4 to fix the unit to the base unit.

In this case, since the length from the bottom surface of the bolt 6's head to the threaded part, that is, the standard dimension T ₀ is shorter than the depth dimension T ₁ of the unit, the threaded part of the bolt 6
The length _T2 includes the tightening allowance _T3 . Therefore,
If the bolt 6 was screwed in to this tightening allowance _T3 , the tightening would become too strong and there was a risk that the unit would be bent and deformed.

Therefore, conventionally, in order to prevent the above-mentioned deflection deformation, in FIG.
In addition, in FIG. 6, a washer 12 is attached to the bolt 6, which is in contact with the top surface of the catch seat when the installation is completed, and this washer 12 is in contact with the top surface of the catch seat. By contacting them, they are prevented from receiving excessive tightening force.

[Problem that the invention attempts to solve]

Since the conventional mounting device is constructed as described above, many parts are required for mounting, and in addition, many parts are required for mounting due to screw fastening.

This invention was made to solve the problems mentioned above, and it requires fewer parts for installation.
Moreover, the object is to provide a unit mounting device that can be mounted with one touch.

[Means for solving problems]

In order to achieve the above object, the present invention provides a protruding locking pawl on one side of the base unit and a perforation on the other side, and also provides a module unit with a protrusion from the side to the bottom and a perforation on the bottom. A fixing metal fitting comprising a recessed part having a hole, a guide having a locking part protruding from the other side of the bottom face, and a through hole having a protruding part, a plate spring part, and a pressing spring part in the recessed part provided in the bottom face. is slidably mounted and the plate spring portion is fixed in a recess provided on the side surface.

[Effect]

Insert the guide of the module unit into the hole made in the base unit and lock the locking part to the edge, then tilt the module unit towards the base unit and attach the protrusion provided on the fixing bracket to the base unit. By engaging the locking claws, the two can be connected with one touch.

〔Example〕

FIG. 1 is a perspective view of an embodiment of the present invention, and FIG. 2 is a cross-sectional view of its main parts, where 2 is a unit and 4 is a base unit. The unit 2 is provided with continuous recesses 21 and 22 from the side surfaces to the bottom surface, and grooves 23 and 23a are formed in parallel from the side surfaces to the bottom surface. Reference numeral 24 denotes a hole penetrated through the recess 22 provided on the bottom surface. Reference numeral 25 denotes a fixing metal fitting, which includes a main body 26 provided with a through hole 27 having a protrusion 28 as shown in FIG. It consists of a pressing spring part 30 extending from
Both edges of the main body 26 are slidably fitted into the grooves 23, 23a of the unit 2, and the leaf spring portion 29 is fixed in the recess 21. At this time, the protrusion 28 of the fixture 25 is located within the hole 24 of the unit 2. Guides 31 and 31a project from the bottom of the unit 2 and are provided with locking portions 32 and 32a. Note that the number of this guide may be one.

In the base unit 4, reference numeral 41 denotes a locking claw protruding outwardly and fixed at the upper side, 42 is a bored hole provided at the lower part, and the guide 3 of the unit 2
1 and 31a.

Next, the order in which the unit 2 is attached to the base unit 4 constructed as described above will be explained.

First, insert the guides 31, 31a of the module 2 into the slots 42 provided at the bottom of the base unit 4, hook the locking parts 32, 32a on their edges, and use the guides 32, 32a as a fulcrum to attach the upper part of the unit 2 to the base unit 4. When it is tilted to the side, the locking pawl 41 enters through the hole 27 of the fixture 25 and automatically engages with the protrusion 25, so that the unit 2 is securely connected to the base unit 4.

To remove the unit 2 from the base unit 4, press down on the leaf spring portion 29 of the fixture 25 with your fingertips and slide the fixture 25 downward. This releases the engagement between the locking pawl 41 and the protrusion 28, so by tilting the unit 2 in the direction away from the base unit 4 and lifting the unit 2 slightly upward, the guides 31, 31a can be removed from the base unit 4. Since it comes off, the unit 2 can be removed from the base unit 4.

[Effect of idea]

In the present invention, the guide of the unit is inserted into the hole provided on one side of the base unit, the locking part is locked to the edge of the hole, the unit is tilted toward the base unit, and the unit is attached to the fixing bracket. Since the protrusion engages with the locking pawl provided on the base unit and the two can be attached and detached with one touch, installation can be done in an extremely short time and there are fewer parts, making it suitable for practical use. The effect is extremely large.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of the present invention, Fig. 2 is a sectional view of its main parts, Fig. 3 is a perspective view of an embodiment of the fixing fitting used in the invention, and Fig. 4 is an example of a program controller. The perspective view, FIGS. 5 and 6 are explanatory diagrams of a conventional unit mounting device. 2: Unit, 4: Base unit, 21,2
2: recess, 25: fixing metal fittings, 28: protrusion, 2
9: Leaf spring part, 31, 31a: Guide, 32, 3
2a: Locking portion, 41: Locking claw, 42: Punch hole.
Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims for Utility Model Registration] A device for attaching a module unit to a base unit, wherein a locking pawl is provided protrudingly on one side of the base unit and a hole is provided on the other side; A recessed portion continuous from the side surface to the bottom surface and having a perforated hole is provided on the bottom surface, and a guide having a locking portion is protruded from the other side of the bottom surface, and a perforated hole having a protruding portion and a plate are provided in the recessed portion provided on the bottom surface. A mounting device for a unit, characterized in that a fixing fitting consisting of a spring part and a pressing spring part is slidably mounted, and the plate spring part is fixed in a recess provided on the side surface.