JP2005180562A - Mounting structure with vibration control function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mounting structure with a vibration control function, capable of damping/absorbing the vibration generated within a range allowing normal operation, even if it is installed in a place where vibration outside of warranty for use or large vibration such as impact is generated. <P>SOLUTION: This mounting structure with a vibration control function includes: a first metal fitting 11 connected to a vertical wall surface 5 of a control board; a second metal fitting 12 connected to PLC1; and a vibration control member 13 interposed between the first and second metal fittings. The first metal fitting and the second metal fitting respectively include: body plate parts 11a, 12a elongated in the vertical direction; and vibration control member fixing surface parts 11b, 12b bent outward in a 90-degree arc, which are provided on the upper sides of the body plate parts. Further, the vibration control member fixing surface part of the second metal fitting is positioned at a predetermined space above the vibration control member fixing surface part of the first metal fitting, and both ends of the vibration control members are respectively connected to both vibration control member fixing surface parts. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a mounting structure with an anti-vibration function.

  PLC (programmable controller) used in FA (factory automation) inputs ON / OFF information of input devices such as switches and sensors, and performs logical operations according to a sequence program (user program) written in a ladder language. Execute. The PLC performs control by outputting a signal of ON / OFF information to an output device such as a valve or an actuator according to the obtained calculation result.

  The PLC also controls CPU units that execute user programs, I / O units that handle input / output devices and handle ON / OFF signals, communication units that connect to external PCs and external controllers, and analog signals. There are two types: a high-performance unit that controls the temperature and positioning, and other types that are connected to each other, and an integrated type that has the necessary functions mounted in one case in advance.

  When any type of PLC is installed at the production site where the FA is built, it is not placed directly on the floor of the production site, and is usually mounted in a box called a control panel. The control panel is installed at a predetermined position. In order to secure a heat dissipation path, the PLC is attached to the vertical wall on the back side of the control panel because a certain space needs to be provided around the PLC (upper, lower, left, and front).

  By the way, if a large vibration is applied to the PLC, there is a risk of malfunction. For this reason, the control panel is usually installed in a place where the PLC is not subjected to large vibrations. However, when a large vibration is applied to the PLC due to the installation layout or other requirements, it is necessary to take a predetermined anti-vibration measure.

As an anti-vibration measure in such a control panel, there is an invention disclosed in Patent Document 1. In this patent document 1, in the column of the prior art, “when a device that generates vibration in a control panel is attached to a common mounting plate together with other devices, other devices are caused to malfunction by propagation of vibrations. Conventionally, in such a case, a device that generates vibration is attached to a common mounting plate via an anti-vibration rubber or the like, or the common mounting plate itself is made strong to vibrate the common mounting plate itself. Is suppressed, and the propagation of vibration to other devices is reduced. " That is, in the case of using the anti-vibration rubber, the anti-vibration rubber is interposed between the vertical wall surface that is the mounting surface and the PLC.
JP-A-9-250595

  However, in the conventional structure in which the anti-vibration rubber is interposed between the vertical wall surface and the PLC, the vibration applied to the PLC cannot actually be absorbed sufficiently. That is, for example, the device itself mounted on the control panel is a vibration source as the invention disclosed in Patent Document 1 is targeted, and the vibration of the device is prevented from being transmitted to another device in the control panel. If it is of the order, the magnitude of the vibration is not so large and may be suppressed, but for example, vibration generated from a large device such as a press device installed around the control panel is transmitted to the control panel. As a result, a large vibration is applied to the control panel and thus to the PLC. As described above, the vibration related to the PLC cannot be suppressed to the extent that the vibration is not affected by the structure in which the anti-vibration rubber is simply interposed. It was.

  This is because the PLC is going to move downward due to its own weight, so that the position of the surface of the anti-vibration rubber connected to the PLC side is lower than the position of the surface connected to the vertical wall surface (fixed). As a result, the anti-vibration rubber is deformed (stretched) in an inclined state. Therefore, it can be estimated that there is a possibility that the vibration absorbing function inherent to the vibration proof rubber may not be sufficiently exhibited. Furthermore, if the load of the PLC becomes heavy, the elongation rate of the vibration-proof rubber in a steady state (no vibration) increases, and not only the vibration absorption function further decreases, but also the PLC may not be supported in the first place.

  The present invention is a mounting with a vibration isolating function capable of attenuating and absorbing vibration generated in the surroundings where normal operation is possible even if it is installed in a place where large vibrations such as vibrations or impacts that are not guaranteed for use occur. The purpose is to provide a structure.

  In order to achieve the above-described object, a mounting structure with a vibration isolating function according to the present invention is a mounting structure for mounting a device subject to vibration isolation on a mounting surface of a vertical wall such as a control panel, and the mounting surface of the vertical wall. A first fixing bracket to be connected, a second fixing bracket to be connected to the device, and a vibration isolating member interposed between the first and second fixing brackets. The first fixing metal fitting and the second fixing metal fitting have a main body plate portion extending in the vertical direction and a vibration isolating member fixing surface portion extending in the horizontal direction provided on the upper side of the main body plate portion. The anti-vibration member fixing surface portion of the second fixing bracket is positioned above the anti-vibration member fixing surface portion of the first fixing bracket with a predetermined space, and the anti-vibration member of the second anti-vibration member fixing surface portion Both ends were connected to each other.

  According to the present invention, for example, the second fixing brackets are connected to both the left and right side surfaces of the vibration-proof target device such as a programmable controller, and the corresponding first fixing brackets are attached to the vertical wall mounting surfaces ( In the embodiment, it corresponds to the vertical wall surface 5). Then, a vibration isolating member is interposed between the corresponding first and second fixing brackets. As a result, the device is supported in a suspended state by the mounting structure with an anti-vibration function of the present invention, and the suspended position is also above the center of gravity of the device, and is held and supported in a stable state. .

  Furthermore, the mounting surface (vibration isolation member fixing surface portion) of the vibration isolating member in the first and second fixing brackets is located in the horizontal plane, and the second fixing bracket connected to the instrument is directed upward. Due to its own weight, a downward urging force is applied to the vibration isolation member, but since the vibration isolation member fixing surface portion of the first fixing bracket is located below the vibration isolation member, the vibration isolation member in a stationary state has a predetermined amount. The compressed state can be maintained and the anti-vibration function of the anti-vibration member can be sufficiently exhibited.

  And the said vibration-proof member fixing surface part is comprised so that it may be arrange | positioned at the width direction outer side of the said apparatus, and it is good for the said vibration-proof member fixing surface part not to cover the upper direction of the said apparatus in the mounting state. In this case, in the case where the operating device generates heat, the device itself can sufficiently exhibit the heat radiation port without covering the upper portion of the device and hindering heat dissipation.

  Furthermore, an auxiliary vibration isolation member fixing surface portion extending horizontally is provided below the main body plate portion of the first fixing bracket and the second fixing bracket, and above the auxiliary vibration isolation member fixing surface portion of the first fixing bracket, The auxiliary vibration isolation member fixing surface portion of the second fixing bracket is positioned with a predetermined space, and both ends of the vibration isolation member may be connected to both the auxiliary vibration isolation member fixing surface portions. If it does in this way, since the anti-vibration function by an anti-vibration member will be expressed also in the lower part, it becomes more effective.

  Furthermore, two sets of the first and second fixing brackets may be provided, and the two second fixing brackets may be integrated through a connecting member. There are various types of devices to which the present invention is applied. For example, a control device such as a programmable controller or a device constituting a system including a programmable controller can be used.

  The present invention can attenuate and absorb vibrations generated in the surroundings where normal operation is possible even when installed in a place where large vibrations such as vibrations or impacts that are not covered by the warranty are generated. It is possible to prevent malfunctions from occurring.

  1 to 5 show a first embodiment of the present invention. In this Embodiment, it is the attachment structure applied to PLC1 comprised by connecting several units. That is, the PLC 1 is configured by connecting a plurality of units 3 to the base unit 2. The unit 3 to be connected includes various units such as a power supply unit, a CPU unit, and an I / O unit, and data is transmitted / received between the units 3 via a bus mounted in the base unit 2. . Further, power supply from the power supply unit to each unit is also performed via a power supply line mounted in the base unit.

  And conventionally, this base unit 2 is fixed by screwing it to a predetermined position of the vertical wall surface 5 on the back side of the control panel. In this embodiment, the mounting bracket and the vibration isolating member (vibration absorbing material) It attaches via the attachment mechanism 10 with an anti-vibration function which consists of etc.

  This attachment mechanism 10 with a vibration isolating function includes a first fixing bracket (stay) 11 connected to the vertical wall surface 5 serving as a fixing surface, a second fixing bracket (stay) 12 connected to the PLC 1 side, and a first and a first of them. 2 is provided with a vibration isolating member 13 interposed between the fixing brackets 11 and 12. And these 1st, 2nd fixing metal fittings 11 and 12 and the vibration isolator 13 are made into 1 set, and each set is arrange | positioned in the left-right both sides of PLC1 in the isolation | separation state, respectively. By separating each group in this way, the same member can be used for the PLCs 1 having different lengths (lateral widths in the left-right direction).

  The first fixing bracket 11 has a flat plate-like main body plate 11a extending in the vertical direction (longitudinal direction), and 90 degrees toward the inner side (PLC1 side) on the rear side (vertical wall surface 5 side) of the main body plate 11a. The bent mounting surface portion 11b is provided, and the anti-vibration member fixing surface portion 11c is bent 90 degrees outward (on the opposite side to the PLC 1) above the body plate 11a. And the through-hole 11d is provided in the attachment surface part 11b at two places up and down. The interval between the two through holes 11d is made to coincide with the interval between the two upper and lower fixing screw holes 5a provided on the vertical wall surface 5. Further, the vibration-proof member fixing surface portion 11c is provided with a large number of through holes 11e.

  In the present embodiment, the first fixing bracket 11 having the above-described shape is formed by pressing a single metal plate. However, in the present invention, it is not necessarily required to be configured from a single metal plate. There may be used a plurality of metal plates, and the material is not limited to metal, and any material may be used as long as it has strength sufficient to support the PLC 1 or the like.

  And this 1st fixing bracket 11 makes the mounting surface part 11b surface-contact with the vertical wall surface 5, aligns the through-hole 11d and the fixing screw hole 5a, and fastens it using the fixing screw 6 in that state. Thus, the first fixing bracket 11 is fixed to the vertical wall surface 5. In this fixed state, the first fixing bracket 11 is in a state in which the main body plate 11a protrudes forward and is positioned in the vertical plane, and the vibration-proof member fixing surface portion 11c is in the horizontal plane.

  The second fixing bracket 12 is also similar in configuration to the first fixing bracket 11 and has a main body plate 12a on a flat plate extending in the vertical direction (longitudinal direction), and the rear side of the main body plate 12a (the vertical wall surface 5 side). ) Is provided with a mounting surface portion 12b bent 90 degrees toward the inner side (PLC1 side) and a vibration isolator-fixing surface portion 12c bent 90 degrees on the outer side (opposite side of PLC1) above the main body plate 12a. It consists of different shapes.

  And the through-hole 11d is provided in the attachment surface part 12b at two places up and down. The interval between the two through-holes 11d is made to coincide with the interval between the through-holes 2a provided above and below the both side edges of the base unit 2 of the PLC 1. Further, in the present embodiment, the interval is made to coincide with the interval between the upper and lower fixing screw holes 5 a provided on the vertical wall surface 5. Thereby, when attaching PLC1 directly to the vertical wall surface 5 without interposing the mounting mechanism 10 with an anti-vibration function of this invention, screwing while adjusting the through-hole 2a of the base unit 2 of PLC1 to the fixing screw hole 5a. The PLC 1 can be directly fixed to the vertical wall surface 5 by using the base unit 2. That is, the fixing screw hole 5a can be used for both a connection structure with anti-vibration measures and a conventional structure without such measures. That is, the control panel can be shared regardless of the presence or absence of anti-vibration measures without wasted screw holes.

  Further, the vibration-proof member fixing surface portion 12c is provided with a large number of through holes 12e. In the mounted state, the anti-vibration member fixing surface portion 12c of the second fixing bracket 12 is positioned above the anti-vibration member fixing surface portion 11c of the first fixing bracket 11 with a predetermined interval therebetween, and the both anti-vibration member fixing portions are further fixed. The through holes 11e and 12e provided in the surface portions 11c and 12c are opposed to each other.

  And this 2nd fixing metal 12 makes the mounting surface part 12b surface-contact with the both-ends back surface of the base unit 2, and aligns the through-hole 12d of the 2nd fixing metal 12, and the through-hole 2a of the base unit 2, The second fixing bracket 12 is fixed to the PLC 1 by fastening with the fixing screw 7 in the state. In this fixed state, the second fixing metal 12 is in a state in which the main body plate 12a protrudes forward and is positioned in the vertical plane, and the vibration-proof member fixing surface portion 12c is in the horizontal plane. In addition, a certain space is ensured between the main body plate 12a and the side surface of the PLC1.

  In the present embodiment, the second fixing bracket 12 having the above-described shape is formed by pressing a single metal plate. However, in the present invention, the metal plate need not necessarily be formed from a single metal plate. There may be used a plurality of metal plates, and the material is not limited to metal, and any material may be used as long as it has strength sufficient to support the PLC 1 or the like.

  The anti-vibration member 13 has a main body 13a in which a gel-like substance that absorbs vibration is formed in a columnar shape, and bolts 13b attached to the upper and lower sides of the main body 13a. And while inserting the bolt 13b in the through-holes 11e and 12e provided in the vibration-proof member fixing surface part 11c and 12c of the 1st, 2nd fixing metal fittings 11 and 12, the washer 8 is interposed in the bolt 13b from which the front-end | tip protruded. By fastening the nut 9, the bolts 13b are connected to the vibration isolating member fixing surface portions 11c and 12c. Thus, the first and second fixing brackets 11 and 12 are linked via the vibration isolation member 13. In this embodiment, two vibration isolating members 13 are provided on one side, but the number of installation is arbitrarily changed according to the load such as PLC 1, the frequency band to be anti-vibrated, the applied acceleration, and other conditions. it can. And in order to change the installation number easily, many through-holes 11e and 12e are provided.

  For example, a product such as BG-8 or MN-3, which is an insulator manufactured by Geltech Co., Ltd., can be used as the vibration isolation member 13. Of course, other anti-vibration members may be used.

  With this configuration, the vibration isolating member 13 is interposed in a transmission path such as vibration between the PLC 1 that is a protection target from vibration and the control panel (vertical wall surface 5). Therefore, even if there is a vibration generating source around the control panel, and the vibration from the vibration generating source is transmitted to the control panel and thus the vertical wall surface 5, the vibration is transmitted to the first fixing bracket 11 as it is. Since it is absorbed and attenuated by the vibration member 13, the amplitude (peak value) is reduced when it is transmitted to the second fixture 12 (PLC1).

  Further, the vibration isolating member fixing surface portion 11c of the first fixing bracket 11 to which the vibration isolating member 13 is attached and the vibration isolating member fixing surface portion 12c of the second fixing bracket 12 are both positioned in the horizontal plane and face each other. Since the vibration isolating member fixing surface portion 12c of the second fixing metal fitting 12 to which the PLC 1 is connected is positioned upward, the vibration isolating member fixing surface portion 12c of the second fixing metal fitting 12 is also moved downward (vertical direction) by the load (self-weight) of the PLC 1. The main body 12a of the vibration isolator 12 is also compressed in the axial direction (vertical direction). Therefore, the weight of the PLC 1 can be reliably supported even when the weight of the PLC 1 is increased, and the body 12a of the vibration isolation member 12 does not slide sideways on the top and bottom surfaces and is not deformed obliquely. It can be demonstrated.

  For this reason, even if a large vibration is generated around the control panel, the vibration isolating member 13 surely absorbs the vibration sufficiently, and the vibration amplitude (peak) of the PLC 1 is such that the operation of the PLC 1 is not affected. ) Can be transmitted in a reduced or zero state. Therefore, it can be installed even in an environment where vibrations and impacts are generated in which operation guarantee cannot be normally obtained.

  Further, in the present embodiment, since the suspension structure supported on the upper side of the PLC 1 is adopted, the supported position (position of the vibration isolating member 13) is above the center of gravity of the PLC 1. As a result, it can be supported in a stable state, and at least when no vibration is applied, the PLC 1 can be held stationary.

  Furthermore, in the present embodiment, since the vibration isolating member fixing surface portions 11a and 12a are both formed to be bent toward the outside of the PLC 1, the first and second fixing brackets 11 and 12 and the vibration isolating member 13 are connected to the PLC 1. It can be located outside in the width direction. Therefore, it does not exist above or below the PLC 1, and the heat dissipation effect can be made the same as when the conventional anti-vibration measures are not taken (does not disturb heat dissipation). Furthermore, in the present embodiment, since the dimensional shape is adjusted so that a predetermined space is provided between both side surfaces of the PLC 1 and the first and second fixing brackets 11 and 12, the heat dissipation effect is further enhanced.

  6 to 10 show a second embodiment of the present invention. The present embodiment is a mounting structure in which necessary functions are applied to an integrated PLC 1 ′ mounted in one housing (unit). Applicable objects are not limited to PLC1, but are suitable, for example, for timers, temperature controllers, remote IO slaves, sensor terminals, etc. that are relatively small or whose dimensions (especially the size in the lateral direction) are determined to some extent. . Of course, application to a type in which a plurality of units described above are connected is not prevented.

  As a specific configuration, basically, as in the first embodiment, the first fixing bracket 11 connected to the vertical wall surface 5 of the control panel and the second fixing bracket connected to the PLC 1 '. 12 and an anti-vibration member 13 that links these metal fittings 11 and 12 together. As a difference, in the first embodiment, the pair of second fixing brackets 12 are separated and attached to the PLC 1 as separate members. In the present embodiment, the left and right second fixing brackets 12 are It is connected to the connecting plate 15 and has an integrated structure. A screw hole 15 a is provided at a predetermined position of the connecting plate 15, and the PLC 1 ′ is screwed with a fixing screw 7.

  Furthermore, in this example, the two second fixing brackets 12 and the connecting plate 15 are actually formed by pressing one metal plate and are also formed by separate members. Of course, it may be configured by combining.

  Further, as the vibration isolating member 13, the same one as in the first embodiment may be used, or the dimensional shape and weight of the PLC 1 'may be different, and may be varied according to it. In the illustrated example, the main body 13a is described in a truncated cone shape. For example, a product such as θ-B, which is an insulator manufactured by Geltech Co., Ltd., is used. Of course, other anti-vibration members may be used, and further, any shape and structure such as a bush type called a gel bush made by Geltech Co., Ltd. can be used. . Since other configurations and operational effects are the same as those of the first embodiment, corresponding members are denoted by the same reference numerals, and detailed description thereof is omitted.

  11 and 12 show a third embodiment of the present invention. In the present embodiment, the vibration isolating member 13 is also provided on the lower side of the fixing bracket based on the first embodiment. That is, the first fixing bracket 11 has a shape further provided with an auxiliary vibration isolating member fixing surface portion 11f that is bent 90 degrees inward at the lower side of the main body plate 11a. A large number of through holes 11 are provided in the auxiliary vibration isolation member fixing surface portion 11c.

  Similarly, the second fixing bracket 12 is also provided with an auxiliary vibration isolating member fixing surface portion 12f, which is based on the configuration of the first embodiment, and is bent 90 degrees outward (on the opposite side to the PLC 1) below the main body plate 12a. It consists of different shapes. And this through-vibration member fixing surface part 12f is also provided with many through-holes 12g. Further, the auxiliary vibration isolation member fixing surface portion 12f is positioned above the auxiliary vibration isolation member fixing surface portion 11f of the first fixture 11, and the vibration isolation member 13 is interposed between the auxiliary vibration isolation member fixing surface portions 11f and 12f. Let

By adopting such a configuration, vibration is also prevented from the lower side of the PLC 1, so that the vibration isolation effect is further enhanced, and the PLC 1 can be held in a more stable state because it is supported on both the upper and lower sides of the PLC 1. Since other configurations and operational effects are the same as those of the first embodiment, corresponding members are denoted by the same reference numerals, and detailed description thereof is omitted.
Of course, the structure in which the vibration isolating members are arranged above and below as described above can be applied to the structure based on the second embodiment as shown in FIGS.

It is a disassembled perspective view which shows the 1st Embodiment of this invention. It is a front view which shows the 1st Embodiment of this invention. It is a top view which shows the 1st Embodiment of this invention. It is a side view which shows the 1st Embodiment of this invention. It is a perspective view which shows the 1st Embodiment of this invention. It is a disassembled perspective view which shows the 2nd Embodiment of this invention. It is a front view which shows the 2nd Embodiment of this invention. It is a top view which shows the 2nd Embodiment of this invention. It is a side view which shows the 2nd Embodiment of this invention. It is a perspective view which shows the 2nd Embodiment of this invention. It is a front view which shows the 3rd Embodiment of this invention. It is a top view which shows the 3rd Embodiment of this invention. It is a front view which shows the 4th Embodiment of this invention. It is a top view which shows the 4th Embodiment of this invention.

Explanation of symbols

1,1 'PLC
2 Base unit 3 Unit 5 Vertical wall 5a Fixing screw hole 6 Fixing screw 7 Fixing screw 8 Washer 9 Nut 10 Anti-vibration mounting mechanism 11 First fixing bracket 11a Body plate 11b Mounting surface 11c Anti-vibration member fixing surface 11d Through hole 11e Through hole 11f Auxiliary vibration isolation member fixing surface portion 12 Second fixing bracket 12a Main body plate 12b Mounting surface portion 12c Vibration isolation member fixing surface portion 12d Through hole 12e Through hole 12f Auxiliary vibration isolation member fixing surface portion 13 Vibration isolation member 13a Main body 13b Bolt 15 Connecting plate

Claims (5)

A mounting structure for mounting a device subject to vibration isolation on the mounting surface of a vertical wall such as a control panel,
A first fixing fitting connected to the mounting surface of the vertical wall;
A second fixing fitting connected to the device;
A vibration isolating member interposed between the first and second fixing brackets;
The first fixing metal fitting and the second fixing metal fitting have a main body plate portion extending in the vertical direction and a vibration-proof member fixing surface portion extending in the horizontal direction provided on the upper side of the main body plate portion,
The anti-vibration member fixing surface portion of the second fixing bracket is positioned above the anti-vibration member fixing surface portion of the first fixing bracket with a predetermined space, and the anti-vibration member is fixed to both the anti-vibration member fixing surface portions. Mounting structure with anti-vibration function that connects both ends of the member.   The anti-vibration member fixing surface portion is configured to be arranged on the outer side in the width direction of the device, and the anti-vibration member fixing surface portion does not cover the upper portion of the device in a mounted state. Item 2. A mounting structure with an anti-vibration function according to Item 1. An auxiliary vibration isolation member fixing surface portion extending horizontally is provided below the main body plate portion of the first fixing bracket and the second fixing bracket,
Positioning the auxiliary vibration isolating member fixing surface portion of the second fixing bracket above the auxiliary vibration isolating member fixing surface portion of the first fixing bracket with a predetermined space therebetween, The mounting structure with a vibration-proof function according to claim 1 or 2, wherein both ends of the vibration-proof member are connected to each other.   The anti-vibration device according to any one of claims 1 to 3, wherein two sets of the first and second fixing brackets are provided, and the two second fixing brackets are integrated via a connecting member. Mounting structure with function.   5. The mounting structure with an anti-vibration function according to claim 1, wherein the device is a control device such as a programmable controller or a device constituting a system including a programmable controller.

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