JP4683564B2 - Rail mounting structure - Google Patents

Description

  The present invention relates to a rail mounting structure suitable for stably mounting a box-shaped device made of a resin molded product on, for example, a long support rail conforming to JIS standards.

Equipment such as a circuit breaker provided on the switchboard and a sensor unit that detects information from various sensors and transmits it to the control device is unitized as, for example, a box-shaped resin molded product, and conforms to, for example, JIS standards and DIN standards. It is often used by attaching to a long support rail. Incidentally, the support rail has a structure provided with a pair of engaging pieces (plate-like edges) projecting along the rail body on both sides of a long rail body having a substantially U-shaped cross section. And the said equipment consisting of a box-shaped resin molded product straddles the above-mentioned support rail, by engaging a pair of engaging claws provided on the rail mounting surface side of the equipment main body with each of the engaging pieces, It is attached to the support rail (see, for example, Patent Documents 1 and 2).
JP-A-6-124644 JP 2005-26506 A

  Incidentally, some of the above-described support rails comply with the IEC standard, the DIN standard, and the like, and there is a difference in the thickness of the above-described engagement piece in each of these support rails. For this reason, when the above-described device is replaced with a support rail having a different standard, there is a case where the device cannot be stably mounted due to a backlash between the device and the support rail. In this regard, in Patent Documents 1 and 2, a protrusion is provided on the rail mounting surface side of the device, and the engagement piece of the support rail is sandwiched between the protrusion and the engagement claw while crushing the protrusion. It is disclosed to prevent the above-mentioned play. However, at one end, when the device is mounted on a support rail having a thin engagement piece and the projection is crushed, the device is then remounted on the support rail having a thin engagement piece. Then, there is a problem that play occurs between the support rails.

  The present invention has been made in consideration of such circumstances, and the object thereof is to stably mount a device formed of a resin molded product on the support rail without rattling regardless of the thickness of the support piece in the support rail. Another object is to provide a rail mounting structure with a simple structure.

In order to achieve the above-described object, the rail mounting structure according to the present invention is a box made of a resin molded product on a support rail having a pair of engaging pieces projecting along the rail body on both sides of a long rail body. It is suitable for mounting equipment of the shape, basically
<a> First and second protrusions that protrude from the side of the pair of engaging pieces across the support rail on the rail mounting surface side of the box-shaped device body;
<b> A fixing claw that forms a gap with the device main body and is provided at the first protrusion and engages with the engagement piece inserted into the gap.
<c> The engagement position is provided on the second protrusion so as to be displaceable between an engagement position in which the engagement piece is sandwiched between the device main body and a position retracted from the engagement position. And a movable claw that engages with the engagement piece at
<d> In particular, when the one of the engagement pieces is inserted into the gap between the fixing claw and the device body, the device is supported with the second protrusion side floating from the support rail, When the device main body is pressed against the support rail from this state, the one engagement piece is elastically deformed in a direction to expand the gap by being pushed by the one engagement piece. It is characterized by being configured to sandwich the

  That is, in the rail mounting structure according to the present invention, the box-shaped device is made of a resin molded product, and can be elastically deformed by utilizing the property that the resin has a fixing claw provided integrally on the rail mounting surface of the device body. In addition, when one of the engagement pieces of the support rail is inserted into the gap with the device main body, the side of the device main body on which the movable claw is provided (second protrusion side) is floated from the support rail. The apparatus is configured to support the apparatus. Then, when the device main body is pressed against the support rail from this state, the fixing claw is forcibly pressed by one engaging piece to elastically deform in a direction to widen the gap, thereby The one engaging piece is firmly held between the two.

  By the way, for the fixed claw, for example, between the bottom surface of the device main body and the base end side supported by the first protrusion from the front end side, the plate thickness of the engagement piece of the support rail is larger than the plate thickness. A tapered gap that gradually narrows may be formed and provided. Alternatively, the fixing claw is provided, for example, with a gap corresponding to the thickness of the engagement piece of the support rail formed between the bottom surface of the device main body and the fixed claw inserted into the gap on the bottom surface of the device main body. A protrusion or an elastic member that contacts the engagement piece and separates the second protrusion side of the device from the support rail may be provided.

  According to the rail mounting structure described above, when the fixed claw of the device is engaged with one of a pair of engaging pieces projecting along the rail main body on both sides of the long rail main body, the device is provided with a movable claw. It is temporarily attached to the support rail in a state where the other side is separated from the support rail and floats obliquely. When the device is forcibly pressed to the support rail side from the temporarily mounted state, the fixed claw is pressed by the one engaging piece and elastically deforms in a direction to widen the gap, and the device main body with the elastic return force The one engagement piece is firmly held between the two. In this state, when the movable claw is displaced from the retracted position to the engaged position and engaged with the other engagement piece, the engagement prevents the device from lifting from the support rail, and at the same time, Since the movable claw provided on the second projection side that attempts to float from the support rail by the elastic return force of the fixed claw is strongly pressed against the other engagement piece, the movable claw is loosely attached to the engagement piece. Without frictional engagement.

  As a result, the fixed claw firmly holds one of the engaging pieces between the device main body, and the movable claw is strongly pressed against the other engaging piece and frictionally engages without rattling. It is securely and stably attached to the support rail. In particular, since the fixed claw and the movable claw are brought into pressure contact with the pair of engaging pieces by using the elastic restoring force generated in the fixed claw, the contact friction force with the engaging piece is sufficiently increased, and the device is attached to the support rail. It can be mounted stably, and it is possible to reliably prevent positional deviation of the device on the support rail.

Hereinafter, a rail mounting structure according to an embodiment of the present invention will be described with reference to the drawings.
A box-shaped electronic device 10 made of a synthetic resin molded product includes, for example, a sensor unit that detects signals from various sensors and transmits the signals to a control device or the like, and a relay unit thereof. As shown in FIG. 20 are mounted side by side. The support rail 20 is compliant with, for example, the CIE standard, JIS standard, DIN standard, etc., and is formed by bending a long metal plate having a predetermined thickness in the width direction and having a substantially U-shaped cross section. It has a shape in which a pair of engagement pieces (plate-like edge portions) 22 and 23 projecting along the rail body 21 are provided on both sides of the long rail body 21. In particular, the pair of engaging pieces 22 and 23 are plate-like edges having a predetermined width that extend on both sides of the rail body 21 at the opening end side of the rail body 21 that has a square cross-sectionally shaped ridge. It is formed as a part. The support rail 20 is provided, for example, by fixing the rail body 21 inside a control panel (not shown) or the like that accommodates a plurality of electronic devices 10 and is disposed in the vicinity of the sensing target device.

  On the other hand, as shown in FIG. 2, the box-shaped electronic device 10 has a rail mounting surface (generally, the bottom surface) of the device main body 11 that forms the main portion of the box-shaped electronic device 10 across the support rail 20. First and second protrusions 12 and 13 projecting on both sides are provided. The first protrusion 12 is fixed to engage with the engagement piece 22 (23) of the support rail 20 inserted into the gap by forming a gap with the rail mounting surface of the device body 11. A nail 14 is provided. The second protrusion 13 has an engagement position (advance position) where the engagement piece 22 (23) is sandwiched between the second protrusion 13 and the apparatus main body 11, and a position retracted from the engagement position A (retreat position). Between the engagement piece 22 and the engagement piece 22 positioned at the rail mounting surface of the device main body 11 at the engagement position. A movable claw 15 is provided to engage the.

  The electronic device 10 provided with the fixed claw 14 and the movable claw 15 on the rail mounting surface of the apparatus main body 11 is basically mounted on the support rail 20 as follows. That is, the movable claw 15 is positioned at the retracted position (retracted position) to widely open the first and second protrusions 12 and 13, and in this state, first, the fixed claw 14 and the rail of the apparatus main body 11 are firstly opened. After inserting (inserting) one engagement piece 22 of the support rail 20 into the gap formed between the mounting surface and the mounting surface, the apparatus main body 11 is placed on the support rail 20 as shown in FIG. Thereafter, in this state, the movable claw 15 is slid from the retracted position (retracted position) to the engaged position (advanced position), and the tip of the movable claw 15 is moved to the other locking piece 23 of the support rail 20. It is performed by positioning the movable claw 15 on the back surface side and engaging the locking piece 23.

  The electronic device 10 is removed from the support rail 20 by first sliding the movable claw 15 from the engagement position (advance position) to the retraction position (retraction position) and engaging the distal end of the movable claw 15 with the engagement. After the engagement with the piece 23 is released and the movable claw 15 side of the electronic device 10 is lifted from the support rail 20 in this state, the electronic device 10 is slightly slid to the fixed claw 14 side to lock the fixed claw 14. This is done by releasing the engagement position with the claw 22.

  Basically, in the electronic device 10 including the fixed claw 14 and the movable claw 15 as described above, the rail mounting structure according to the present invention is characterized in that the fixed claw 14 is connected to the fixed claw 14 and the device. When the one engagement piece 22 is inserted into the gap with the main body 11, the electronic device 10 is tilted in a state where the second protrusion 13 side provided with the movable claw 15 is floated from the support rail 20. When the device main body 11 is pressed against the support rail 20 from this state, the device main body 11 is elastically deformed so as to be pushed by the engagement piece 22 and widen the gap. The engagement piece 22 is configured to be clamped.

  Specifically, for example, as shown in FIG. 3 (a), the fixed claw 14 is supported by the first protrusion 12 from the front end side between the bottom surface (rail mounting surface) of the device body 10. A taper-shaped gap that gradually becomes narrower than the plate thickness t of the engagement piece 22 (23) of the support rail 20 is formed toward the base end side. More specifically, the fixed claw 14 has a tapered shape in which the surface facing the rail mounting surface of the device body 10 forms an inclined surface so that the gap gradually widens toward the tip side. Configure to make.

  The angle of the inclined surface is determined by moving the electronic device 10 in the width direction of the support rail 20 without bringing the second protrusion 13 side of the device body 10 provided with the movable claw 15 into contact with the support rail 20. It is set to such an extent that the engagement piece 22 (23) can be attached and detached between the fixed claw 14 and the rail mounting surface of the device body 10. And by setting the gap width w at the back of the gap formed between the fixed claw 14 and the rail mounting surface of the device body 10 to be smaller than the plate thickness t of the engagement piece 22 (23). The front end edge of the engagement piece 22 (23) inserted into the gap is in contact with the fixing claw 14 and the device main body 10 in the middle of the engagement piece 22 (23) to prevent further insertion.

  Thus, according to the electronic device 10 including the fixed claw 14 having such a shape (structure), the electronic device 10 is tilted obliquely (the movable claw 15 side is lifted) and the engagement piece 22 of the support rail 20 is moved. When the electronic device 10 is mounted on the support rail 20 so as to be sandwiched between the fixed claw 14 and the device main body 10, the leading edge of the locking piece 20 is fixed to the fixed claw 14 as shown in FIG. The fixed claw 14 and the device main body 10 are brought into contact with each other at a position in the middle of the gap with the device main body 10. The engaging piece 22 is lightly held between the fixed claw 14 and the device main body 10 so as to slightly widen the gap between the fixed claw 14 and the device main body 10. Then, the electronic device 10 is temporarily attached (temporarily fixed) to the support rail 20 in a state where the attachment posture to the engagement piece 22 is maintained.

  From such a temporarily mounted (temporarily fixed) state of the electronic device 10, the movable claw 15 side of the electronic device 10 is pressed toward the support rail 20, and the movable claw 15 is provided across the support rail 20. When the protrusion 13 of the electronic device 10 is forcibly positioned on the side of the locking piece 23 opposite to the support rail 20, the force due to the reaction tries to separate the fixing claw 14 side of the electronic device 10 from the support rail 20. Join the direction to do. Then, as described above, since one engagement piece 22 is sandwiched between the fixed claw 14 and the device main body 11, the engagement piece 22 is slightly bent as shown in FIG. The fixing claw 14 is elastically deformed so as to widen the gap between the device 14 and the device body 11.

  In other words, the engaging piece 22 sandwiched between the gap between the fixed claw 14 and the device main body 11 causes the elastic device to be slightly bent in accordance with the forced change in the posture of the electronic device 10, and the repulsive force The fixed claw 14 is pressed strongly. In response to this pressing force, the fixed claw 14 is elastically deformed so as to widen the gap with the device main body 11 and strongly presses the engagement piece 22 toward the device main body 11 by its repulsive force. As a result, the engagement piece 22 is firmly sandwiched between the fixed claw 14 and the device main body 11 without rattling.

  At this time, due to the elastic repulsive force of the fixed claw 14 and the engaging piece 22, a force for lifting the device main body 11 from the support rail 20 acts on the movable claw 15 side of the device main body 11. . Therefore, if the movable claw 15 provided on the second protrusion 13 is slid to the locking position (advance position) and positioned on the back surface side of the locking piece 23, the movable claw 15 is locked by the above-described force. The movable claw 15 engages with the locking piece 23 without rattling. As a result, the fixed claw 14 and the movable claw 15 are firmly engaged with the engagement pieces 22 and 23 of the support rail 20 without rattling, and the engagement piece 22 is interposed between the fixed claw 14 and the apparatus main body 11. Since the electronic device 10 is firmly sandwiched, the electronic device 10 is mounted on the support rail 20 in a mechanically stable manner. And it becomes possible to prevent position shift of the electronic device 10 along the support rail 20 reliably.

  By the way, instead of forming the fixing claw 14 in a tapered shape as described above, the support rail 20 is engaged with the bottom surface of the device body 11 as shown in FIGS. 4 (a) and 4 (b), for example. A gap corresponding to the plate thickness t of the joining piece 22 may be formed and provided. In this case, the second protrusion 13 side of the electronic device 10 is brought into contact with the engagement piece 22 inserted in the gap with the fixed claw 14 on the bottom surface of the device body 11 from the support rail 20. Protrusions 16 for separating are provided. Incidentally, the protrusion 16 is formed between the apparatus main body 11 and the fixed claw 14 so that at least an opening width corresponding to the plate thickness t of the engagement piece 22 can be secured between the protrusion 16 and the tip of the fixed claw 14. What is necessary is just to make it provide in the position slightly protruded from the opening part of the gap formed.

  According to the electronic device 10 provided with such a fixed claw 14 and the protrusion 16, the support rail 20 is not obstructed by the protrusion 16 by tilting the electronic device 10 obliquely (lifting the movable claw 15 side). The engagement piece 22 can be inserted between the fixed claw 14 and the device main body 10. Then, as shown in FIG. 4A, the engagement piece 22 is lightly sandwiched between the fixing claw 14 and the projection 16 at the insertion position where the tip edge of the engagement piece 22 contacts the back surface of the apparatus main body 11, and the electronic The device 10 is temporarily fixed (temporarily mounted) in a tilted posture in which the movable claw 15 side is lifted with respect to the support rail 20.

  From such a temporarily mounted (temporarily fixed) state of the electronic device 10, the movable claw 15 side of the electronic device 10 is pressed toward the support rail 20, and the movable claw 15 is provided across the support rail 20. When the protrusion 13 is forcibly positioned on the side of the locking piece 23 on the opposite side of the support rail 20, the force due to the reaction supports the fixed claw 14 side of the electronic device 10 as in the above-described embodiment. It is added in a direction to be separated from the rail 20. Then, as described above, since the engaging piece 22 is positioned in contact with the projection 16, the engaging piece 22 is slightly bent as shown in FIG. The fixing claw 14 is elastically deformed so as to widen the gap. The engaging piece 22 is strongly pressed against the device main body 11 by the repulsive force accompanying the elastic deformation of the fixing claw 14, so that the engaging piece 22 does not rattle between the fixing claw 14 and the protrusion 16. It will be clamped firmly. Therefore, even in this embodiment, the same effect as the previous embodiment can be obtained.

  Further, a leaf spring (elastic member) 17 may be provided on the bottom surface of the device main body 11 as shown in FIG. According to the electronic device 10 including such a leaf spring 17, the leaf spring 17 functions as the protrusion 16 described above, and the elastic force of the leaf spring 17 acts as a force for pressing the engagement piece 22. Therefore, the holding force of the engagement piece 22 by the fixed claw 14 can be further increased, and the attachment of the electronic device 10 to the support rail 20 can be made stronger and mechanically stable.

  The present invention is not limited to the embodiment described above. For example, the arrangement interval of the fixed claw 14 and the movable claw 15 may be set according to the standard of the support rail 20 on which the electronic device 10 is mounted. Further, here, the mounting structure of the electronic device 10 such as the sensor unit or the relay unit to the support rail 20 has been described as an example. However, the same applies to the case where power distribution parts such as a wiring breaker and a relay are attached to the support rail 20. Is possible. Moreover, the structure of the movable claw 15 can employ | adopt suitably other than the slide type mentioned above. In addition, the present invention can be variously modified and implemented without departing from the scope of the invention.

1 is a diagram showing a schematic configuration of a system in which a plurality of electronic devices are mounted on a support rail to which a rail mounting structure according to the present invention is applied. The figure which shows the basic attachment structure of the electronic device to a support rail. The figure which shows the rail attachment structure which concerns on the 1st Embodiment of this invention. The figure which shows the rail attachment structure which concerns on the 2nd Embodiment of this invention. The figure which shows the rail attachment structure which concerns on the 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Electronic device 11 Apparatus main body 12 1st protrusion 13 2nd protrusion 14 Fixed nail | claw 15 Movable nail | claw 16 Protrusion 17 Leaf spring (elastic member)
20 Support rails 22, 23 Engagement pieces (plate-like edges)

Claims (3)

A rail mounting structure for mounting a box-shaped device made of a resin molded product on a support rail having a pair of engaging pieces projecting along the rail body on both sides of a long rail body,
The device has first and second protrusions that protrude from the side of the pair of engaging pieces across the support rail on the rail mounting surface side of the device main body,
A fixing claw that forms a gap with the device main body and is provided at the first protrusion, and engages with the engagement piece inserted into the gap.
The second projecting portion is provided to be displaceable between an engagement position where the engagement piece is sandwiched between the device body and a position retracted from the engagement position. It has a movable claw that engages with the engagement piece,
When one of the engagement pieces is inserted into a gap with the device main body, the fixed claw supports the device with the second protrusion side floating from the support rail. When the device main body is pressed against the support rail, the one engagement piece is sandwiched between the device main body by being elastically deformed so as to be pushed by the one engagement piece to widen the gap. Rail mounting structure characterized by   The fixing claw is gradually narrower than the plate thickness of the engagement piece of the support rail from the front end side to the base end side supported by the first protrusion between the fixing claw and the bottom surface of the device main body. The rail mounting structure according to claim 1, which is provided by forming a tapered gap. The fixed claw is provided with a gap corresponding to the plate thickness of the engagement piece of the support rail between the bottom surface of the device body,
The protrusion of the said apparatus main body is contacted with the said engagement piece inserted in the said clearance gap, and the processus | protrusion or elastic member which separates the said 2nd protrusion part side of the said apparatus from the said support rail is provided in Claim 1. Rail mounting structure as described.

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