WO2014132411A1

WO2014132411A1 - Plc unit

Info

Publication number: WO2014132411A1
Application number: PCT/JP2013/055515
Authority: WO
Inventors: 嘉一村田; 貴也谷口; 水谷　寛; 雄大仁木
Original assignee: 三菱電機株式会社
Priority date: 2013-02-28
Filing date: 2013-02-28
Publication date: 2014-09-04
Also published as: JP5774251B2; JPWO2014132411A1

Abstract

Provided is a PLC unit (50) in which a control unit (2) is retained in a base (1). The base comprises: a foundation part (3), further comprising an opposing face (3a) which opposes a lateral face (2a) of the control unit; a retaining part (4) which is formed to extend from one end side of the foundation part to the control unit side; an engaging part (6) which is formed to extend from the other end side of the foundation part to the control unit side; and a standing part (5) which is formed to protrude from the retaining part to the engaging part side. Upon the control unit are formed: an insertion part (12) which is inserted between the standing part and the foundation part, and which makes contact with the standing part and thereby restricts movement of the control unit in a direction separating from the foundation part; and a part for engaging (10) which is engaged with the engaging part and which restricts movement of the control unit in a direction separating from the foundation part. In a state of the control unit being retained by the base, an impeller part (11), which impels in the direction of separating the base and the control unit, is formed upon the opposing face of the foundation part and/or the one lateral face of the control unit.

Description

PLC unit

The present invention relates to a PLC unit in which a control unit is fixed to a base.

Conventionally, as a PLC (programmable logic controller) unit used in a system such as an FA device, for example, there is a PLC unit in which a control unit is fixed to a base (see, for example, Patent Document 1). In such a PLC unit, a connector is provided on the mutually opposing surfaces of the control unit and the base. Then, the control unit side connector and the base side connector are coupled by fixing the control unit to the base.

Japanese Patent Laid-Open No. 2001-22408

The PLC unit as described above has a problem that when the control unit vibrates, the electrical connection between the connector on the control unit side and the connector on the base side cannot be taken, and an error occurs. Therefore, it is possible to more firmly fix the control unit and the base in order to suppress the vibration of the control unit.

For example, after inserting the protrusion formed at the lower end of the control unit into the hole formed in the base, the upper end of the control unit is pushed into the base side, and the control unit is engaged with the base at the upper end portion. May be fixed. In this case, the vibration of the control unit can be suppressed by configuring the protrusion and the hole with a shape and size such that the protrusion of the control unit is press-fitted into the hole formed in the base.

However, in order to press the protrusion into the hole well, the alignment between the protrusion and the hole must be performed with high accuracy. Therefore, there is a problem that it is difficult to fix the control unit smoothly.

The present invention has been made in view of the above, and an object of the present invention is to obtain a PLC unit that can more easily fix a control unit to a base while suppressing vibration of the control unit.

In order to solve the above-described problems and achieve the object, the PLC unit includes a control unit having a unit-side connector and a base having a base-side connector, and the unit-side connector and the base-side connector are connected. The control unit is a PLC unit that is held by a base, the base having a base portion having a facing surface facing one side surface of the control unit, and a holding portion formed so as to extend from one end side of the base portion to the control unit side. And an engaging portion formed so as to extend from the other end side of the base portion to the control unit side, and a standing portion formed so as to protrude from the holding portion toward the engaging portion side. The control unit is inserted between the upright portion and the base portion, and engages with the insertion portion that contacts the upright portion and restricts the movement of the control unit in the direction away from the base portion, and the engaging portion. Combined And an engaged portion that restricts movement in a direction away from the base portion of the unit, and the inserted portion is inserted between the standing portion and the base portion, and the engaged portion side of the control unit is The control unit is held on the base by engaging the engaging portion and the engaged portion by pushing into the base side, and the control unit is provided on at least one of the opposing surface of the base and one side surface of the control unit. The urging portion that urges the base and the control unit in a direction in which the base and the control unit are separated is formed at a position in contact with the other in the final stage of the procedure for holding the control unit on the base. Features.

According to the present invention, it is possible to more easily fix the control unit to the base while suppressing the vibration of the control unit.

FIG. 1 is an external perspective view showing a schematic configuration of the PLC unit according to the first embodiment of the present invention. FIG. 2 is a side view of the base as viewed from the side. FIG. 3 is a plan view of the control unit as viewed from above. 4 is a cross-sectional view taken along line AA shown in FIG. FIG. 5 is a cross-sectional view taken along line BB shown in FIG. FIG. 6A is a diagram for explaining a procedure of fixing the control unit to the base. FIG. 6B is a diagram for explaining the procedure for fixing the control unit to the base. 7 is a cross-sectional view taken along line DD shown in FIG. FIG. 8 is a cross-sectional view taken along the line DD shown in FIG. 5 and shows another example of the shape of the protrusion. FIG. 9 is a cross-sectional view taken along the line DD shown in FIG. 5 and is a diagram showing still another example of the shape of the protrusion. FIG. 10 is a partially enlarged view in which the portion C shown in FIG. 3 is enlarged, and shows a state before the control unit is fixed to the base. FIG. 11 is an enlarged partial view of the portion C shown in FIG. 3 and shows a state after the control unit is fixed to the base. FIG. 12 is a diagram illustrating a modification of the control unit. FIG. 13 is a diagram illustrating another modification of the control unit. FIG. 14 is a diagram showing still another modification of the control unit.

Hereinafter, a PLC unit according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is an external perspective view showing a schematic configuration of a PLC unit 50 according to the first embodiment of the present invention. The PLC unit 50 includes a plurality of control units 2 and a base 1. A plurality of control units 2 are fixed to the base 1 side by side.

In the following description, a direction in which a plurality of control units 2 are arranged is a horizontal direction, a direction from the control unit 2 toward the base 1 is a depth direction, and a direction perpendicular to the horizontal direction and the depth direction is a height direction. Say. Further, the base 1 side with respect to the control unit 2 is referred to as the back side, and the control unit 2 side with respect to the base 1 is also referred to as the near side.

FIG. 2 is a side view of the base 1 as viewed from the side. The base 1 includes a base portion 3, a holding portion 4, a standing portion 5, an engaging portion 6, and a base side connector 7. The base 1 is made of metal, for example, and the base 3, the holding part 4, the standing part 5, and the engaging part 6 are integrally formed.

The base 3 is a plate-like member. One surface of the base 3 is a facing surface 3 a that faces the control unit 2 fixed to the base 1. The holding part 4 is formed so as to extend from one end side of the base part 3 to the control unit 2 side. The engaging portion 6 is formed so as to extend from the other end side of the base portion 3 to the control unit 2 side. In the following description, the holding part 4 side is also referred to as the lower side with respect to the base part 3, and the engaging part 6 side is also referred to as the upper side with respect to the base part 3. The standing portion 5 is erected from the tip of the holding portion 4 toward the upper side (engagement portion 6 side). The tip of the upright portion 5 has an R shape in a side view.

The tip of the engaging portion 6 has a claw-like shape that can hook the control unit 2. The base side connector 7 is provided on the facing surface 3 a of the base 3. A unit-side connector (described later) provided in the control unit 2 is connected to the base-side connector 7.

FIG. 3 is a plan view of the control unit 2 as viewed from above. 4 is a cross-sectional view taken along line AA shown in FIG. FIG. 5 is a cross-sectional view taken along line BB shown in FIG. The control unit 2 has a substantially rectangular parallelepiped shape as a whole.

The one side surface 2 a of the control unit 2 faces the facing surface 3 a while being fixed to the base 1. A unit-side connector 13 is provided on one side surface 2 a of the control unit 2. With the control unit 2 fixed to the base 1, the unit side connector 13 and the base side connector 7 are connected.

A protrusion (biasing portion) 11 that protrudes toward the base 1 is formed on one side surface 2 a of the control unit 2. An insertion portion 12 that protrudes downward is formed on the lower surface of the control unit 2 on the base 1 side. The insertion part 12 is inserted between the standing part 5 and the base part 3 when the control unit 2 is fixed to the base 1.

A recess 8 is formed in the upper part of the control unit 2 and on the base 1 side. When the control unit 2 is fixed to the base 1, the engaging portion 6 of the base 1 is inserted into the recess 8. An engaged portion 10 that is engaged with the inserted engaging portion 6 is formed inside the recess 8. The tip of the engaged portion 10 has a claw-like shape that can be caught by the engaging portion 6. The recess 8 is formed with a fitting projection 9 that abuts the distal end of the inserted engaging portion 6 from the lateral direction to fit the engaging portion 6.

FIGS. 6A and 6B are diagrams for explaining the procedure for fixing the control unit 2 to the base 1. 6A and 6B, the control unit 2 is shown in the cross-sectional view shown in FIG. As shown in FIG. 6A, first, the insertion portion 12 of the control unit 2 is inserted between the base portion 3 and the standing portion 5 of the base 1.

Next, in the state where the insertion portion 12 is inserted and the lower surface of the control unit 2 and the tip of the standing portion 5 are in contact, the upper portion of the control unit 2 is pushed in the direction indicated by the arrow P, that is, the base 3 side. Then, the control unit 2 is rotated. By this procedure, as shown in FIG. 6B, the engaging portion 6 of the base 1 and the engaged portion 10 of the control unit 2 are engaged, and the control unit 2 is fixed to the base 1.

In a state where the control unit 2 is fixed to the base 1, in the lower part of the control unit 2, the insertion portion 12 comes into contact with the standing portion 5, and movement in a direction away from the base portion 3 (front side) is restricted. The Moreover, in the upper part of the control unit 2, the engaging part 6 and the engaged part 10 are engaged, and the movement in the front direction is restricted.

Here, the protrusion height X from the one side surface 2a of the protrusion 11 (see FIG. 4) is the distance Y between the one side surface 2a and the opposing surface 3a when the control unit 2 is fixed to the base 1 (FIG. 6-). 2). This is because the height V (see FIG. 4) from the front side surface of the insertion portion 12 to the back side surface of the protrusion 11 in the control unit 2 is the distance W (from the facing surface 3a to the standing portion 5 in the base 1). It can be said that it is larger than that shown in FIG.

Therefore, when the control unit 2 is fixed, the protrusion 11 is crushed by the facing surface 3a. As a result, the control unit 2 is biased in a direction away from the base portion 3, and the insertion portion 12 is firmly pressed against the standing portion 5 of the base 1. This can be said to be a state in which the control unit 2 is fitted between the base portion 3 and the standing portion 5. Thereby, the vibration of the control unit 2 is suppressed.

The protrusion 11 is crushed when the protrusion 11 abuts against the facing surface 3a, that is, at the final stage of the procedure for fixing the control unit 2. Therefore, in the initial stage of the procedure for fixing the control unit 2, work requiring a large load such as press-fitting or fitting does not occur. Therefore, it is not necessary to perform alignment with accuracy at the initial stage of the fixing procedure, and the control unit 2 can be fixed to the base 1 more easily.

FIG. 7 is a cross-sectional view taken along line DD shown in FIG. The protrusion 11 has an R shape in which a cross-sectional shape viewed from above becomes narrower toward the tip. Therefore, the protrusion 11 is easily crushed as compared with the case where the protrusion is formed with the same thickness toward the tip, and the control unit 2 can be fixed to the base 1 with less force. Further, by providing a plurality of protrusions 11 arranged in the horizontal direction, the urging force in the separation direction can be increased, and a larger vibration can be suppressed.

FIG. 8 is a cross-sectional view taken along the line DD shown in FIG. 5 and shows another example of the shape of the protrusion 11. FIG. 9 is a cross-sectional view taken along the line DD shown in FIG. 5, and is a diagram showing still another example of the shape of the protrusion 11. As a cross-sectional shape of the protrusion 11 whose tip is narrowed, a tapered shape may be used as shown in FIG. 8, or a corner of the tip may be chamfered as shown in FIG.

In the procedure of fixing the control unit 2, the control unit 2 is pushed into the base 3 side and rotated in a state where the tip of the standing portion 5 of the base 1 is in contact with the lower surface of the control unit 2. That is, the control unit 2 is rotated with the contact point between the tip of the standing portion 5 of the base 1 and the lower surface of the control unit 2 as a base point. Here, as described above, since the tip of the standing portion 5 has an R shape in a side view, the contact portion between the tip of the standing portion 5 of the base 1 and the lower surface of the control unit 2 is a base point. The smooth rotation of the control unit 2 can be achieved. Thereby, the load at the time of fixing the control unit 2 can be reduced, and the control unit 2 can be fixed to the base 1 more easily.

FIG. 10 is a partially enlarged view in which the portion C shown in FIG. 3 is enlarged, and shows a state before the control unit 2 is fixed to the base 1. FIG. 11 is a partially enlarged view in which the portion C shown in FIG. 3 is enlarged, and shows a state after the control unit 2 is fixed to the base 1.

As shown in FIG. 10, the fitting protrusions 9 are formed on the left and right sides inside the recess 8. The width P of the fitting protrusion 9 is smaller than the width R of the engaging portion 6 of the base 1. Therefore, when the control unit 2 is fixed to the base 1, the engaging portion 6 inserted in the recess 8 abuts in the lateral direction, so that the fitting projection 9 is crushed and the fitting projection 9 is interposed between the fitting projections 9. The tip of the engaging part 6 is fitted.

The fitting protrusion 9 is formed in the back part of the recessed part 8 so that the front-end | tip of the engaging part 6 may be fitted. Therefore, the fitting protrusion 9 is crushed and the engaging portion 6 is fitted in the final stage of the procedure for fixing the control unit 2 to the base 1. Thereby, similarly to the description of the protrusion 11 described above, in the initial stage of the procedure for fixing the control unit 2, work requiring a large load such as press fitting or fitting does not occur.

Therefore, it is not necessary to perform alignment accurately at the initial stage of the fixing procedure, and the control unit 2 can be fixed to the base 1 more easily. Moreover, since the fitting protrusion 9 contacts and engages with the engaging portion 6 from the lateral direction, vibration of the control unit 2 in the lateral direction can be suppressed. In addition, since the fixation of the control unit 2 becomes stronger by fitting the tip of the engaging portion 6 between the fitting protrusions 9, the direction of vibration to be suppressed is not limited to the horizontal direction, It is also possible to obtain the effect of suppressing the vibration in the direction. Further, since the fitting protrusion 9 is tapered on the inlet side (base 3 side) of the recess 8, the engaging portion 6 can easily enter between the fitting protrusions 9. Thereby, it is possible to further reduce the load when the control unit 2 is fixed.

Further, the engaged portion 10 is provided with a different color portion (engagement state confirmation portion) 15 with a different color from other regions. As shown in FIG. 10, the different color portion 15 is at least partially from above in a state where the control unit 2 is not fixed to the base 1, that is, in a state where the engaging portion 6 is not engaged with the engaged portion 10. 11 in the state where the control unit 2 is fixed to the base 1 as shown in FIG. 11, that is, in the state where the engaging portion 6 is completely engaged with the engaged portion 10, It is provided at a position where it is difficult to visually recognize.

Therefore, in the process of fixing the control unit 2 to the base 1, if the control unit 2 is pushed in until the different color portion 15 becomes invisible, the engaging portion 6 and the engaged portion 10 are completely engaged, It can be confirmed that the control unit 2 is firmly fixed to the base 1. That is, while the different color portion 15 can be visually recognized, it can be easily grasped that the fixing of the control unit 2 is insufficient.

FIG. 12 is a view showing a modification of the control unit 2. As shown in FIG. 12, a plurality of protrusions 11 may be formed side by side in the height direction. Specifically, the protrusions 11 are formed on both upper and lower sides with the unit-side connector 13 interposed therebetween. Thereby, the vibration of the control unit 2 can be further suppressed.

FIG. 13 is a diagram showing another modification of the control unit 2. As shown in FIG. 13, the protrusion 11 may be formed above the unit-side connector 13. The timing at which the protrusion 11 is crushed can be closer to the final stage of the procedure of fixing the control unit 2 to the base 1 as the protrusion 11 is formed on the upper side. Therefore, by forming the protrusion 11 on the upper side of the unit-side connector 13, the work that requires a load of crushing the protrusion 11 can be brought closer to the final stage of the fixing procedure, and the control unit 2 can be more easily connected to the base 1. It becomes possible to fix to.

FIG. 14 is a diagram showing still another modified example of the control unit 2. As shown in FIG. 14, a leaf spring (biasing portion) 14 may be provided as an elastic body on one side surface 2 a of the control unit 2. In this case, the control unit 2 is urged in the direction away from the base 3 of the base 1 by the elastic force of the leaf spring 14, and the vibration of the control unit 2 is suppressed. The elastic body is not limited to a leaf spring, and is provided between the one side surface 2a of the control unit 2 and the base portion 3 of the base 1 so long as it biases the control unit 2 away from the base portion 3. Good.

In the above description, the protrusion 11 and the elastic body have been described by way of examples provided on the control unit 2 side, but are not limited thereto. For example, it may be provided on the facing surface 3 a of the base 1, or may be provided on both the one side surface 2 a of the control unit 2 and the facing surface 3 a of the base 1.

In addition, the description related to the attitude of the PLC unit 50 such as up and down and left and right in the above description is merely an example, and the use of the PLC unit 50 in an attitude different from the above description is not limited. For example, the above description may be reversed. For example, the insertion part 12 may be formed in the upper part of the control unit 2, and the recessed part 8 and the to-be-engaged part 10 may be formed in the lower part. In this case, the base 1 is also used in an upside down posture.

Also, a base board (not shown) on which the base side connector 7 is mounted may be attached to the base 3 of the base 1. When the protrusion 11 of the control unit 2 comes into contact with the substrate, the surface of the substrate that faces one side surface of the control unit 2 functions as the facing surface. In this way, the portion with which the protrusion 11 abuts may function as an opposing surface that crushes the protrusion 11.

As described above, the PLC unit according to the present invention is useful for a PLC unit in which a control unit is fixed to a base.

1 base, 2 control unit, 2a one side, 3 base, 3a facing surface, 4 holding part, 5 standing part, 6 engaging part, 7 base side connector, 8 concave part, 9 mating protrusion, 10 engaged Part, 11 projection (biasing part), 12 plugging part, 13 unit side connector, 14 leaf spring (biasing part), 15 different color part (engagement state confirmation part), 50 PLC unit.

Claims

A PLC unit comprising a control unit having a unit side connector and a base having a base side connector, wherein the control unit is held by the base in a state where the unit side connector and the base side connector are connected,
The base is
A base having a facing surface facing one side of the control unit;
A holding part formed to extend from one end side of the base part to the control unit side;
An engagement portion formed to extend from the other end side of the base portion to the control unit side;
A standing portion formed so as to protrude from the holding portion toward the engagement portion side,
The control unit includes
An insertion part that is inserted between the standing part and the base part and contacts the standing part to restrict movement of the control unit in a direction away from the base part;
An engaged portion that is engaged with the engaging portion and restricts movement of the control unit in a direction away from the base portion;
With the insertion part inserted between the standing part and the base part, the engaging part and the engaged part are pushed by pushing the engaged part side of the control unit into the base part side. Is engaged to hold the control unit on the base,
A biasing force that biases the base unit and the control unit in a direction in which the base unit and the control unit are separated from each other on at least one surface of the opposing surface of the base part and one side surface of the control unit. The PLC unit is formed at a position in contact with the other surface at the final stage of the procedure for holding the control unit on the base.
The PLC unit according to claim 1, wherein the urging portion is a protrusion provided on at least one of a facing surface of the base portion and one side surface of the control unit.
The PLC unit according to claim 2, wherein the protrusion has a tapered shape in which a cross-sectional shape becomes narrower toward a tip.
The PLC unit according to claim 2, wherein the protrusion has an R shape whose cross-sectional shape becomes narrower toward the tip.
The PLC unit according to any one of claims 2 to 4, wherein a plurality of the protrusions are provided side by side in a direction from the holding portion toward the engaging portion.
2. The PLC unit according to claim 1, wherein the urging unit is an elastic body provided on at least one of a facing surface of the base and one side surface of the control unit.
The PLC unit according to claim 6, wherein the elastic body is a leaf spring.
The control unit is formed with a recess into which the engaging portion is inserted,
When the direction from the control unit toward the base is the depth direction, the direction from the holding portion toward the engagement portion is the height direction, and the depth direction and the direction perpendicular to the height direction are the lateral direction In addition, the concave portion is formed with a fitting protrusion that abuts the distal end of the inserted engaging portion in the lateral direction to fit the engaging portion. PLC unit as described in any one of these.
The PLC unit according to claim 8, wherein a taper is formed on a portion of the fitting protrusion on the base side.
10. The PLC unit according to claim 8, further comprising an engagement state confirmation unit that allows confirmation of an engagement state between the engagement unit and the engaged portion.
The engagement state confirmation part is a different color part to which a different color from other regions is given in the engaged part,
The at least part of the different-colored portion can be visually recognized until the engaging portion and the engaged portion are engaged with each other, and can be visually recognized in a state where the engaging portion and the engaged portion are engaged. The PLC unit according to claim 10, wherein the PLC unit is provided in an area in which it is difficult to perform
The PLC unit according to any one of claims 1 to 11, wherein a tip of the standing portion is chamfered.