JP5987649B2 - Unit mounting structure - Google Patents

Description

  The present invention relates to a unit mounting structure.

  Conventionally, for example, when constructing a system with a plurality of industrial machines (for example, a device that has a roller or a pressure part and performs molding of a member, a handling device that moves members into and out of a molding device, etc.) A controller of a control system in which a control system of an industrial machine is integrated in one place is provided. This controller is designed to construct a predetermined control system by attaching a module unit (CPU unit, power supply unit, I / O unit, etc.) having necessary functions to a base plate. Additional module units can be installed according to the scale of the system. As such a unit mounting structure for a controller, for example, a unit mounting structure for a programmable controller in which a connector of a module unit is connected to a connector of a base unit is known (see Patent Document 1 below).

JP-A-1-133109

By the way, conventionally, in order to receive vibration accompanying driving of an industrial machine or the like, the module unit is screwed to the base plate, and a tool such as a screwdriver is required to attach the module unit.
However, the controller is often installed in the control panel, and there is a problem that illumination and work space cannot be secured sufficiently and the module unit cannot be easily attached and detached. Also, under such a working environment, it is difficult to mount the module unit directly facing the connector of the base plate, and the connector or the pin may be damaged by being inclined or contacting.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a unit mounting structure capable of easily mounting a module unit at a normal position.

In order to solve the above problems, the present invention provides a unit mounting structure in which when a module unit is mounted on a base plate, a connector of the base plate and a connector of the module unit are connected, and the module unit includes: The base plate has a hand tightening screw provided so as to protrude from the exterior, and the base plate is formed with a guide groove for guiding the module unit to a connector connection position in cooperation with the hand tightening screw. A configuration is employed in which a sandwiched portion is sandwiched between the exterior by screwing.
By adopting this configuration, in the present invention, the module unit is fixed to the base plate by screwing a hand-tightening screw provided on the exterior of the module unit and sandwiching the held portion. Thus, by using a hand-tightened hand-tightening screw for fixing the module unit, the module unit can be easily attached without requiring a tool for attachment. Further, the module unit is guided to the connector connecting position via the hand tightening screw by the guide groove of the held portion. For this reason, even if it is a case where illumination and working space are not fully securable in a control panel, a module unit can be positioned and attached to a normal position.

Moreover, in this invention, when the said to-be-clamped part is pinched | interposed, the structure that the said exterior is electrically grounded is employ | adopted.
By adopting this configuration, in the present invention, when the clamped portion is sandwiched by tightening the hand tightening screw, the exterior is electrically grounded, so that radiation noise from the electronic components in the module unit It becomes a countermeasure.

Moreover, in this invention, the said module unit employ | adopts the structure that it protrudes rather than the said to-be-held part and is attached and the heat-radiation hole is formed in the said protruding part of the said exterior.
By adopting this configuration, in the present invention, since there is a heat radiating hole in the exterior in the portion protruding from the sandwiched portion, the heat of the electronic component can be efficiently released from the module unit to the outside.

In the present invention, the base plate is provided with a plurality of connectors corresponding to a plurality of types of module units, and the connector provided on the base plate and the guide groove corresponding to the connector The positional relationship is different for each type of module unit.
By adopting this configuration, in the present invention, since the positional relationship between the connector and the guide groove is different for each type of module unit, it is possible to prevent erroneous mounting of a module unit of a type not corresponding to the connector. Can do.

Moreover, in this invention, the said module unit employ | adopts the structure that it has a 2nd hand-tightening screw for screwing in parts other than the said to-be-held part of the said base plate.
By adopting this configuration, in the present invention, since the predetermined fixing strength can be secured by the second hand tightening screw, even when the industrial machine is in the vicinity, the connector connection is not unstable due to vibration or impact. can do.

In the present invention, the base plate is attached with a substrate on which the connector is mounted, and at least a part of both end portions of the base plate in the longitudinal direction of the base plate is bent to the side on which the substrate is attached. Is adopted.
By adopting this configuration, in the present invention, the portions of the base plate that are bent to the side on which the substrate is attached at both ends in the longitudinal direction of the substrate serve as a barrier for radiation noise from the electronic components mounted on the substrate. Therefore, even if it is arranged in the control panel, the surrounding electronic components can be prevented from being affected.

  ADVANTAGE OF THE INVENTION According to this invention, the unit attachment structure which can attach a module unit to a normal position easily is obtained.

It is a front view which shows the structure of the unit attachment structure in embodiment of this invention. It is a bottom side perspective view showing composition of a unit attachment structure in an embodiment of the present invention. It is the rear view, side view, bottom view, and top view which show the structure of the module unit in embodiment of this invention. It is a front view which shows the structure of the baseplate in embodiment of this invention. It is a top view which shows the structure of the baseplate in embodiment of this invention. It is a figure for demonstrating the attachment or detachment operation | work of the module unit of the unit attachment structure in embodiment of this invention. It is a figure for demonstrating the fail safe function of the unit attachment structure in embodiment of this invention. It is the front view and side view of a baseplate in another embodiment of the present invention.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a front view showing a configuration of a unit mounting structure 1 according to an embodiment of the present invention. FIG. 2 is a bottom perspective view showing the configuration of the unit mounting structure 1 according to the embodiment of the present invention. FIG. 3 is a rear view, a side view, a bottom view, and a plan view showing the configuration of the module unit 2 in the embodiment of the present invention. FIG. 4 is a front view showing the configuration of the base plate 3 in the embodiment of the present invention. FIG. 5 is a plan view showing the configuration of the base plate 3 in the embodiment of the present invention.

  The unit mounting structure 1 of this embodiment is applied as hardware for mounting the module unit 2 to the base plate 3 in a control controller that controls a plurality of industrial machines. This unit mounting structure 1 is provided in a control panel (not shown). As shown in FIG. 1, a plurality of module units 2 are attached to the base plate 3. In the present embodiment, as the module unit 2, a CPU unit 2A, a power supply unit 2B, and other expansion units 2C (I / O unit or the like) are attached.

  Each module unit 2 has the same height, but has a different horizontal width for each type (CPU unit 2A, power supply unit 2B, expansion unit 2C). Specifically, the CPU unit 2A has the largest width, the next power supply unit 2B, and the one with the smallest width is the expansion unit 2C. The plurality of module units 2 are detachably fixed by a lower hand tightening screw 4 and an upper hand tightening screw (second hand tightening screw) 5. The hand-tightening screws 4 and 5 are screws having a head portion that can be turned by hand. Since the CPU unit 2A has a horizontal width, two upper hand-tightening screws 5 are provided. The hand-tightening screws 4 and 5 include knurled screws or butterfly bolts.

  As shown in FIG. 4, the base plate 3 is provided with a plurality of connectors 6 (connectors 6 </ b> A, 6 </ b> B, 6 </ b> C) corresponding to a plurality of types of module units 2. The plurality of connectors 6 are mounted on the surface of one substrate 7. An electronic component (not shown) is also mounted on the back surface of the substrate 7. The connector 6 is connected to the connector of the corresponding module unit 2 (for example, the connector 8 shown in FIG. 3A) to electrically connect each of the module units 2, and a predetermined control system can be connected. It comes to form.

  As shown in FIG. 2, the base plate 3 includes a substrate holding portion 10 that holds the substrate 7 and a held portion 20 that is held by the hand-tightening screws 4. The base plate 3 of the present embodiment is bent in an L shape, and the vertical portion is the substrate holding portion 10 and the horizontal portion is the pinched portion 20. The base plate 3 is formed of a metal plate having good workability such as an aluminum plate. The base plate 3 is electrically grounded.

  The substrate holding unit 10 has a groove 11 in a portion where the substrate 7 is attached. The groove 11 is provided so as to extend in the long side direction of the substrate holding part 10 having a rectangular shape when viewed from the front. The groove 11 is formed by pressing the substrate holding unit 10 or the like. The depth of the groove 11 is set to a size that can accommodate an electronic component (not shown) mounted on the back surface of the substrate 7. Further, as shown in FIG. 4, the substrate holding unit 10 has a hole 12 into which the upper hand-tightening screw 5 of the module unit 2 is screwed. The hole 12 is provided in the upper part of the substrate holding part 10 (part other than the sandwiched part 20) so as to penetrate in the thickness direction.

  As shown in FIG. 2, the held portion 20 protrudes horizontally from the lower portion of the substrate holding portion 10 toward the front side of the module unit 2 in the attaching / detaching direction. The protruding length of the held portion 20 is not more than half of the length of the module unit 2 in the attaching / detaching direction. The pinched portion 20 has a guide groove 21 that guides the module unit 2 to the connector connection position (position where the connector connection shown in FIGS. 1 and 2 is possible) in cooperation with the hand tightening screw 4.

  As shown in FIG. 5, the guide groove 21 is linearly formed from the tip of the held portion 20 toward the back side. The starting end portion of the guide groove 21 is increased in diameter toward both sides toward the front side, so that the lower hand-tightening screw 4 on the lower side of the module unit 2 can be easily guided. The guide grooves 21 correspond to the module units 2 on a one-to-one basis, and a plurality of the guide grooves 21 are provided in the held portion 20. The arrangement of the plurality of guide grooves 21 (guide grooves 21A, 21B, 21C) corresponds to the plurality of connectors (connectors 6A, 6B, 6C).

  Specifically, as shown in FIG. 5, a connector 6 (connectors 6A, 6B, 6C) provided on the base plate 3 and a guide groove 21 (guide grooves 21A, 21B, 21C) corresponding to the connector 6 are provided. The positional relationship differs for each type of module unit 2. In the present embodiment, the offset distance m1 of the guide groove 21A with respect to the connector 6A, the offset distance m2 of the guide groove 21B with respect to the connector 6B, and the offset of the guide groove 21C with respect to the connector 6C in the lateral direction (horizontal direction orthogonal to the attaching / detaching direction). The distance m3 is different.

  On the other hand, the module unit 2 (CPU unit 2A) has a box-shaped exterior 9 as shown in FIG. The exterior 9 is a metal housing and accommodates electronic components, boards, and the like corresponding to the unit. Note that the configurations of the power supply unit 2B and the expansion unit 2C other than the internal electronic components are substantially the same as the configuration of the CPU unit 2A shown in FIG. 3, and therefore their description is omitted. As shown in the rear view of FIG. 3A, the module unit 2 has a hand tightening screw 4 that protrudes downward from the bottom surface of the exterior 9. The hand-tightening screw 4 is provided so as to be screwed in the vertical direction with respect to the exterior 9.

  The hand-tightening screw 4 is provided offset from the connector 8 corresponding to the offset distance m1 (refer to FIG. 5 in the case of the CPU unit 2A). Further, as shown in the bottom view of FIG. 3B, the hand tightening screw 4 is provided on the bottom surface of the exterior 9 on the back side in the attaching / detaching direction. A heat radiating hole 30 is formed on the bottom surface of the exterior 9. The heat radiation hole 30 is formed on the bottom surface of the exterior 9 on the front side in the attaching / detaching direction. Specifically, as shown in FIG. 2, when the module unit 2 is mounted so as to protrude from the held portion 20, a heat radiating hole 30 is formed in the bottom surface portion of the protruding exterior 9. .

  Moreover, the module unit 2 has the screw attachment part 31 bent up as shown in the side view of FIG.3 (c). The screw attachment portion 31 is a portion to which the upper hand tightening screw 5 is attached, and is erected vertically on the back side of the exterior 9. A hand tightening screw 5 is attached to the screw attachment portion 31 so as to be screwed toward the back side in the attaching / detaching direction. Moreover, the module unit 2 has the heat radiating hole 32 as shown in the top view of FIG.3 (d). The heat radiation hole 32 is formed on substantially the entire top surface of the exterior 9.

Subsequently, an attaching / detaching operation of the module unit 2 in the unit mounting structure 1 having the above configuration will be described with reference to FIGS. 6 and 7.
FIG. 6 is a diagram for explaining the attaching / detaching operation of the module unit 2 of the unit mounting structure 1 according to the embodiment of the present invention. FIG. 7 is a diagram for explaining the fail-safe function of the unit mounting structure 1 according to the embodiment of the present invention.

  First, the operator grasps the module unit 2 to be connected to the connector 6 of the base plate 3, and manually tightens the lower side provided in the guide groove 21 corresponding to the connector 6 so as to protrude from the exterior 9 of the module unit 2. Fit the screws 4 together. Then, as shown in FIG. 6, the operator places the bottom surface of the exterior 9 on the held portion 20 protruding toward the front side in the horizontal direction, and slides on the held portion 20 so as to slide the module unit 2. Is pushed into the mounting / removing direction. At this time, since the lower hand-tightening screw 4 is in the guide groove 21, the displacement in the lateral direction perpendicular to the attaching / detaching direction is restricted.

  In the present embodiment, as shown in FIG. 5, the positional relationship between the connector 6 and the guide groove 21 is different for each type of the module unit 2, so that the type of module unit 2 not corresponding to the connector 6 is used. Incorrect mounting can be prevented. For example, as shown in FIG. 7, even if a module unit 2 other than the CPU unit 2A (for example, the power supply unit 2B) is mistakenly attached to the connector 6A, the connector 6A and the guide groove 21A have a positional relationship of the offset distance m1. Therefore, when the lower hand tightening screw 4 of the module unit 2 that is not supported is fitted in the guide groove 21A, the connectors (connectors 6A and 8B) should not face each other properly. It is possible to prevent failure due to incorrect mounting.

  On the other hand, when the module unit 2 corresponding to the connector 6 is attached, the module unit 2 is connected to the connector 6 provided on the base plate 3 by the cooperation of the lower hand-tightening screw 4 and the guide groove 21. Guided to the appropriate connector connection position. Accordingly, even when the module unit 2 is attached and detached in a control panel (not shown) as in the present embodiment, the module unit 2 can be brought to a normal position even if sufficient lighting and work space cannot be secured. Can be positioned.

  Once the base plate 3 and the module unit 2 are connected to each other by connectors, the handclamping screw 4 provided on the exterior 9 of the module unit 2 is screwed in, and the sandwiched portion 20 is sandwiched between the module 9 and the module unit 2. The unit 2 is fixed to the base plate 3 (see FIG. 2). Thus, by using the hand-tightened hand-tightening screw 4 for fixing the module unit 2, the module unit 2 can be easily attached to the base plate 3 without requiring a tool for attachment. Therefore, the operator can fix the module unit 2 without holding the tool, and can eliminate the fear of damage to the device due to working with the tool when the lighting and work space are not enough, Work can be done safely.

  Further, in the present embodiment, as shown in FIG. 1, the module unit 2 is screwed onto the upper part of the substrate holding part 10, which is a part other than the held part 20 of the base plate 3, by the upper hand tightening screw 5. Thus, a predetermined fixing strength can be ensured. That is, when the industrial machine is in the vicinity, the connector connection does not become unstable even if the industrial machine is subjected to vibration or impact by fixing the lower hand-tightening screw 4 and the upper hand-tightening screw 5 from two directions. Can be. Moreover, since the upper hand-tightening screw 5 can be screwed in the attaching / detaching direction, the operator can easily turn it.

  Furthermore, since the base plate 3 is electrically grounded, as shown in FIG. 2, when the sandwiched portion 20 is sandwiched, the exterior 9 is electrically grounded. For this reason, it becomes a countermeasure against radiation noise from the electronic components in the module unit 2. Further, in the present embodiment, the module unit 2 is mounted so as to protrude from the held portion 20, and a heat radiating hole 30 is formed in a protruding portion of the exterior 9. As described above, since the heat radiating hole 30 of the exterior 9 is located in a portion protruding from the held portion 20, the guide unit 21 is provided in the held portion 20 to guide the module unit 2. However, the heat radiation hole 30 on the bottom surface side is not blocked, and the heat of the electronic component can be efficiently discharged from the module unit 2 to the outside by the chimney effect of the upper and lower heat radiation holes 30 and 32.

  Thus, according to the above-described embodiment, when the module unit 2 is attached to the base plate 3, the unit mounting structure 1 in which the connector of the base plate 3 and the connector of the module unit 2 are connected, 2 has a hand-tightening screw 4 projecting from the exterior 9, and the base plate 3 is formed with a guide groove 21 for guiding the module unit 2 to the connector connection position in cooperation with the hand-tightening screw 4. A unit mounting structure that allows the module unit 2 to be easily mounted at a normal position by adopting a configuration in which the gripped portion 20 is sandwiched between the exterior 9 by screwing the hand-tightening screw 4 1 is obtained.

  As mentioned above, although preferred embodiment of this invention was described referring drawings, this invention is not limited to the said embodiment. Various shapes, combinations, and the like of the constituent members shown in the above-described embodiments are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

For example, in the above embodiment, it has been described that the groove 11 is formed in the substrate holding portion 10 of the base plate 3 along the longitudinal direction of the substrate 7. However, a configuration as shown in FIG. 8 may be adopted. .
FIG. 8 is a front view and a side view of the base plate 3 in another embodiment of the present invention.

  As shown in FIG. 8, the base plate 3 is a portion corresponding to the groove 11 to which the substrate 7 (not shown in FIG. 8) is to be attached, and at least a part of both ends of the base plate 3 in the longitudinal direction of the substrate 7. However, a bent portion 33 that is bent on the side to which the substrate 7 is attached (the front side in the attaching / detaching direction) is provided. According to this configuration, the bent portions 33 at both ends in the longitudinal direction of the base plate 3 can block the gap (see FIG. 2) between the substrate 7 and the groove 7. Thus, since there is a bent portion 33, it becomes a barrier for radiation noise through the gap from the electronic component mounted on the substrate 7, so even if it is arranged in the control panel, It is possible to prevent the surrounding electronic components from being affected.

  Further, for example, in the above-described embodiment, the configuration in which the module unit 2 is prevented from being erroneously mounted by the offset distance between the connector 6 and the guide groove 21 is described. A configuration in which the groove width of the guide groove 21 is different may be adopted.

  Further, for example, the present invention is not limited to industrial machines, and can be applied to various devices and apparatuses having a control system such as a moving object and a household device.

  DESCRIPTION OF SYMBOLS 1 ... Unit mounting structure, 2 ... Module unit, 3 ... Base plate, 4 ... Hand fastening screw, 5 ... Hand fastening screw (2nd hand fastening screw), 6 ... Connector, 7 ... Board | substrate, 8 ... Connector, 9 ... Exterior , 20 ... Nipped part, 21 ... Guide groove, 30 ... Radiation hole, 33 ... Bent part

Claims (6)

When the module unit is attached to the base plate, a unit mounting structure in which the connector of the base plate and the connector of the module unit are connected,
The module unit has a hand tightening screw provided to protrude from the exterior,
The base plate is formed with a guide groove for guiding the module unit to a connector connection position in cooperation with the hand tightening screw, and is held between the exterior by screwing the hand tightening screw. A unit mounting structure characterized by comprising:   The unit mounting structure according to claim 1, wherein the exterior is electrically grounded when the sandwiched portion is sandwiched. The module unit is attached so as to protrude from the held portion,
The unit mounting structure according to claim 1, wherein a heat radiating hole is formed in the projecting portion of the exterior. The base plate is provided with a plurality of connectors corresponding to a plurality of types of module units,
The positional relationship between the connector provided on the base plate and the guide groove corresponding to the connector is different for each type of the module unit. The unit mounting structure described in 1.   The unit according to any one of claims 1 to 4, wherein the module unit has a second hand-tightening screw for screwing onto a portion of the base plate other than the sandwiched portion. Mounting structure. A substrate on which the connector is mounted is attached to the base plate,
6. The unit mounting structure according to claim 1, wherein at least a part of both end portions of the base plate in a longitudinal direction of the base plate is bent to a side on which the substrate is mounted. .

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