JP2008169946A - Vibration isolation stand - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration isolation stand which changes the outer dimension according to the size of placing equipment at relatively low cost, and easily adjusts the position of a fitting bolt even in an equipment fitted state. <P>SOLUTION: Frame members 4, 4 extending in the longitudinal direction of an upper stand 1 are constituted of a square pipe, a slide rail 5 comprising a pair of round pipes 50, 50 are put across the frame members, and a fixing fitting 6 is slidably fitted to a space between the round pipes 50, 50. The fixing fitting 6 is formed by bending a steel plate in a U shape, and positioned so that the upper surface of an upper wall part 60 is made lower than the upper end of the outer peripheral surface of the round pipe 50 by a prescribed dimension. Preferably, the fixing fitting 6 is made attachable and detachable to and from the round pipes 50, 50. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an anti-vibration mount for installing equipment with large vibration, such as a pump unit, and particularly relates to the technical field of the structure of an upper mount for fixing the device with bolts.

  Conventionally, as an anti-vibration mount for a pump unit or the like, generally used is one in which anchor bolts are movably arranged in a plurality of recesses opened on the upper surface of the upper mount, and the position of the anchor bolt is determined by the pump unit. After adjusting according to the mounting holes, concrete or the like is filled in the recesses and fixed (for example, see Patent Document 1).

  Such an anti-vibration stand requires a concrete placing work on site, which is troublesome and has a problem that it is easy to put a load on the environment. Moreover, since the adjustment width of the position of the anchor bolt is relatively narrow, it cannot be applied to all of a wide variety of pump units. Furthermore, since the outer dimensions of the upper base are constant, it is not preferable to set this according to a somewhat large pump unit because a small pump unit occupies a useless installation area.

  Corresponding to such a problem, in the one described in Patent Document 2, a long hole-shaped bolt insertion hole is formed in a member (upper frame) extending along the vertical side which is one side of the rectangular frame-shaped upper frame. The members (horizontal mounts) extending along the horizontal sides are configured to be extendable so that the horizontal width of the entire vibration isolation mount can be adjusted according to the size of the pump unit.

Moreover, in patent document 3, the pump base mounting plate made from a steel plate which covers the whole surface is attached to the upper stand of the vibration isolator for pumps. A long hole-like bolt insertion hole extending obliquely in the width direction is formed in the mounting plate, and the position of the bolt can be adjusted along the insertion hole. Further, a slide adjusting plate that can slide in the longitudinal direction is added to the mounting plate, and a bolt insertion hole similar to the above is also formed in this.
Japanese Utility Model Publication No. 54-22873 Japanese Utility Model Publication No. 54-22873 Utility Model Registration No. 3114135

  However, the anti-vibration mount that adjusts the overall width as in the former conventional example (Patent Document 2) can be reduced in width according to the size of the pump unit. It is very difficult to work with the pump unit mounted on the stand, and it is extremely difficult to align the bolt insertion hole of the upper stand with the mounting hole of the pump unit placed so It is a thing.

  On the other hand, in the case of using a large mounting plate as in the latter conventional example (Patent Document 3), if the pump unit is placed on the plate, the position of the bolt is difficult to understand and there is no space for putting a hand. It is practically impossible to adjust the position of the bolt, and the pump unit must be mounted after the position of the bolt is accurately adjusted in advance.

  Moreover, since the installation area of the anti-vibration base is determined by the size of the mounting plate, there remains a problem of useless installation area in the case of a small pump unit. Note that it is impractical to prepare a plurality of sizes of mounting plates in advance according to the size of the pump unit in view of the cost of a mold for press-molding a steel plate mounting plate.

  In view of these points, the object of the present invention is to change the external dimensions at a relatively low cost in accordance with the size of the equipment to be mounted, and to easily adjust the position of the mounting bolt even when the equipment is mounted. The purpose is to provide an anti-vibration stand.

  In order to achieve the above object, in the vibration isolating frame of the present invention, at least two slide rails made of a pair of round pipes are bridged between a plurality of frame members extending in the vertical direction of the upper frame. A fixing bracket is fitted between the round pipes in such a manner that it can slide even when the device is placed.

  Specifically, the invention of claim 1 includes an upper base on which equipment is placed, and a lower base disposed at a predetermined interval below the upper base, and a plurality of them are provided between them. The present invention is directed to a vibration isolator that is provided with a vibration isolator to reduce transmission of vibration from the device.

  The upper frame includes a plurality of frame members extending in the vertical direction and a slide rail including a pair of round pipes extending in the horizontal direction between the frame members. At least two are spaced apart in the direction, and each end is fixed to the frame member so that the position thereof can be adjusted, and a fixing bracket is slidably fitted between two paired round pipes. Include. The upper surface of the fixture is substantially flat and is positioned below the upper end of the outer peripheral surface of the round pipe by a predetermined dimension, and the insertion hole for the mounting bolt is opened there.

  In the anti-vibration mount having the above-described configuration, an upper mount is configured by spanning a slide rail made of a round pipe such as a gas pipe between a plurality of frame members. The lateral dimension can be changed by simply changing the cutting length. Similarly, if the pipe member is cut and used in the same manner, the vertical dimension can be changed simply by changing the cutting length, and the outer dimensions can be changed at a relatively low cost. is there.

  Further, when the pump unit is installed, it is placed on the slide rail of the gantry, but this slide rail is made of a round pipe, and it is relatively easy to ensure strength and rigidity. Moreover, even when the pump unit is placed on the round pipe (slide rail), there is sufficient space to put a hand below it, and there is a gap between the lower surface of the pump unit and the upper surface of the fixing bracket. Therefore, the fixing fitting can be slid to easily align the bolt insertion hole with the mounting hole of the pump unit.

  In other words, the overall dimensions of the vibration isolator can be changed at a relatively low cost according to the size of the equipment to be installed, and the position of the mounting bolt can be easily adjusted according to the mounting hole of the installed equipment. .

  In addition, a small gap of about 1 mm or less is formed between the upper surface of the fixing bracket and the lower surface of the device placed on the slide rail, that is, the upper end of the round pipe without tightening the mounting bolt. In other words, it is preferable to position the upper surface of the fixing bracket about 0.5 to 1.0 mm below the upper end of the outer peripheral surface of the round pipe.

  In addition, it is preferable that the end portion of the round pipe of the slide rail is fastened to the frame member with a bolt via a bracket, so that the slide rail becomes a fixed end support and secures the support rigidity of the device. It's easy to do. In this case, the fixing position of the end portion of the slide rail can be continuously adjusted by making the bolt insertion hole of the bracket into a long hole shape that is long in the vertical direction of the upper base.

  Furthermore, the fixing bracket is extended between two round pipes that are paired with each other on the slide rail, and a pair of upper and lower extending portions provided at both ends are locked to the outer peripheral surface of each round pipe. And while the upper extension part is brought into contact with the outer peripheral surface of each round pipe from the diagonally upper side of the counterpart round pipe (called the intermediate side), the lower extension part is The circular pipe is brought into contact with the outer peripheral surface of the round pipe from an obliquely lower side (also referred to as an outer side) opposite to the intermediate side or from directly below (Claim 2).

  In this configuration, the upper extending portion at the end of the fixing bracket is in a relatively shallow engagement state in which it extends toward and contacts the outer peripheral surface of the round pipe that gradually recedes toward the upper side. If the size of the projecting portion is appropriately set, the fixing bracket can be extracted downward from between the round pipes or can be fitted in the opposite direction by bending the round pipe itself. On the other hand, the lower extending portion is in a deep locking state where it contacts the lower end of the outer peripheral surface of the round pipe or the outside thereof, thereby positioning the fixing bracket with respect to the round pipe.

  As the configuration of the fixing bracket, it is more preferable that the plate member is bent, and a rectangular upper wall portion whose longitudinal direction is substantially orthogonal to the axis of the round pipe and a side wall portion depending from both sides in the width direction are suspended. And forming a rectangular piece-like upper extension part continuously at both ends in the longitudinal direction of the upper wall part, thereby making the fixing bracket relatively inexpensive Can do.

  In this case, it is preferable that the upper wall portion of the fixing bracket is viewed from either side in the longitudinal direction, and the upper corner portion is positioned at two corner portions respectively positioned at the front left corner and the rear right corner. A notch extending over the extended portion and the side wall portion is formed, and the length of the diagonal direction of the fixing metal fitting connecting the two corner portions is made substantially the same as the interval between the two round pipes forming a pair ( In this way, the fixing bracket can be easily attached to and detached from the two round pipes forming a pair of slide rails.

  That is, for example, when fitting the fixing bracket between the round pipes, first, the longitudinal direction thereof is directed in the axial direction of the round pipe and inserted between the round pipes from below, and then rotated clockwise as viewed from above. Move. Then, since the length of the diagonal direction of the fixing bracket connecting the two corners where the notches are formed is substantially the same as the interval between the two round pipes, the fixing bracket is located between the two round pipes in the longitudinal direction. It rotates until the direction is in the direction in which the round pipes are arranged (a direction substantially orthogonal to the axis), and fits between them.

  At that time, the upper edge of the lower extension of the fixture is in sliding contact with the lower end of the outer peripheral surface of the round pipe, while the upper extension of the upper wall is obliquely above the outer peripheral surface of the round pipe. Since it comes into contact with each other and gradually bends while being slid along this surface, the upper extending portion and the round pipe are not subjected to excessive force, and the operation can be easily performed.

  In addition, the direction in which the fixing bracket is rotated is the direction in which the right screw is tightened, so that the mounting bolt is inserted into the insertion hole of the fixing bracket fitted between the round pipes as described above. When the nut is tightened or when the nut is tightened, a force in the same direction as that for fitting the fixing bracket between the round pipes is applied to the fixing bracket, and there is no possibility of the fixing bracket dropping off.

  More preferably, a protrusion is formed on the lower extension portion of the fixing bracket so as to come into contact with the outer peripheral surface of the round pipe from an obliquely lower side (outside) on the opposite side (outside). 4). In this way, when the fixing bracket is rotated and fitted between the round pipes as described above, the protrusion of the lower extension part moves over the lower end of the round pipe and moves to the outside, and thereafter, the round is started from the outside diagonally below. Since it comes into contact with the outer peripheral surface of the pipe and the rotation of the fixing bracket in the opposite direction is restricted, it is possible to more reliably prevent the fixing fitting once fitted between the round pipes from dropping off.

  By the way, when the upper surface of the fixing bracket is positioned below the upper end of the outer peripheral surface of the round pipe as described above, the lower surface of the pump unit placed on the round pipe is in line contact with the upper end of the outer peripheral surface of the round pipe. Therefore, the weight of the pump unit and the load due to the vibration of the pump unit act on the linear contact portion in a concentrated manner. For this reason, when the lower part of a pump unit is casting, for example, it is easy to generate | occur | produce a crack and we are anxious about the fall of durability.

  Therefore, a metal plate member such as a steel plate or an aluminum plate is placed from the upper surface of the fixture to the outer peripheral surface of the round pipe (Claim 5), and the pump unit is placed thereon. For example, it is possible to avoid the concentration of the load on a part of the lower surface and to prevent the durability problem. In addition to this, for example, an elastic sheet member such as a rubber sheet can be placed on the upper surface of the fixing bracket to reduce the concentration of load on the lower surface of the pump unit.

  In the anti-vibration frame having the above-described configuration, the upper frame may be provided with two or more vertical frame members and two horizontal slide rails. Three or more of at least one of the frame member and the slide rail can be used. If only the number of frame members and slide rails is increased in this way, the cost will not increase much.

  As described above, according to the vibration isolating frame according to the invention of claim 1 of the present application, at least two slide rails including a pair of round pipes are mounted between the plurality of frame members extending in the vertical direction of the upper frame. Since the fixing metal fitting is fitted between the round pipes, the external dimensions can be changed at a relatively low cost by changing the cutting length of the frame member or the round pipe.

  In addition, by positioning the upper surface of the fixing bracket below the upper end of the outer peripheral surface of each round pipe by a predetermined dimension, the fixing bracket can be slid even when the pump unit is placed on the round pipe (slide rail). The bolt insertion hole can be easily aligned with the mounting hole of the pump unit, and the installation work of the equipment becomes easy.

  In particular, if the fixing bracket is configured as in the inventions of claims 2 to 4, it is possible to reliably prevent the fixing bracket from falling off the slide rail while having a simple and inexpensive configuration. Can be easily attached to and detached from the slide rail, and the installation work of the equipment can be further facilitated.

  Further, the invention of claim 5 can avoid the concentration of load on the lower surface of the pump unit to prevent the problem of durability, and the invention of claim 6 causes a significant increase in cost. It can cope with the enlargement of equipment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

  FIG. 1 shows an embodiment of a pump anti-vibration table A to which the anti-vibration frame of the present invention is applied, in which (a) is a plan view, and (b) and (c) are a front view and a right side view, respectively. It is. As shown in the figure, the pump vibration isolator A includes an upper base 1 on which a pump unit P (equipment: only the outer shape is shown in phantom lines in FIG. 1A), which is composed of a pump and an electric pump, and a predetermined unit below the upper base 1 is mounted. The lower pedestal 2 arranged at intervals, and a plurality of isolators 3, 3,... (Vibration isolator) interposed between the upper pedestal 1 and the lower pedestal 2 are provided.

  The upper base 1 has two frames extending in the vertical direction which is the direction of any one side (long side in the example of the figure, but it may be short side) of the pump vibration isolation base A having a rectangular shape in plan view. The members 4 and 4 and two slide rails 5 and 5 bridged in the horizontal direction between them are configured in a ladder shape. The frame member 4 is formed of a rectangular pipe having a rectangular cross section (for example, a square steel pipe for structure), and the slide rail 5 is formed by arranging a pair of round pipes 50 and 50 (for example, gas pipes) in parallel with each other.

  Thus, since the slide rail 5 is constituted by the round pipes 50, 50, it is relatively easy to ensure its strength and rigidity. The ends of the round pipes 50, 50, that is, the ends of the slide rail 5 are fastened by bolts 52 from above through a common bracket 51 in a state where they are superimposed on the upper surface of the frame member 4. As a result, the slide rail 5 serves as a fixed end support, so that the support rigidity of the pump unit P can be easily secured.

  Specifically, as shown in FIG. 2, the bracket 51 is formed by bending a steel plate or the like into a U-shaped cross section, and has a rectangular upper wall portion that is long in the longitudinal direction of the frame member 4, and its width direction. And a pair of side wall portions that respectively hang down from both sides. One of the side wall portions is longer in the vertical direction than the other, and overlaps the inner side surface of the frame member 4 (the surface on the side of another frame member 4 adjacent in the lateral direction). The end portion of the round pipe 50 penetrates the one side wall portion of the bracket 51 to reach the other side wall portion, and is fixed to the both side wall portions by welding.

  In addition, an insertion hole 51a for the bolt 52 is formed in the upper wall portion of the bracket 51 in the shape of a long hole that is long in the vertical direction of the upper frame, and the shaft portion of the bolt 52 that is inserted into the insertion hole 51a is the frame member 4. The bolt 52 is screwed into a bolt hole 4a opened on the upper surface thereof, and the head of the bolt 52 fastens the peripheral edge of the bolt insertion hole 51a via a washer. The fixing position of the bracket 51 can be continuously adjusted in the longitudinal direction of the frame member 4 within a range in which the shaft portion of the bolt 52 moves in the longitudinal direction of the bolt insertion hole 51a.

  As described above, the fixture 6 is fitted between the two round pipes 50, 50 of the slide rail 5 whose ends are fixed to each other so as to be slidable in the longitudinal direction. This fixing bracket 6 is formed by bending a steel plate or the like in the same manner as the bracket 51 described above to have a U-shaped cross section, and when passed between two round pipes 50 and 50 as shown in FIG. A rectangular upper wall portion 60 in which the direction in which the round pipes 50 are arranged (the direction substantially perpendicular to the axis of the round pipe 50 and the longitudinal direction of the upper base 1 and the left-right direction in FIG. 3) is the longitudinal direction; And side wall portions 61 and 61 that respectively hang down from both sides in the width direction.

  As shown in FIG. 4, the upper surface of the upper wall portion 60 of the fixing bracket 6 is substantially flat, and a mounting bolt 62 for mounting the fixing bracket 6 to the lower surface of the pump unit P (see FIG. 1). An insertion hole 60a (shown only in (b)) is opened as a long circular hole in the longitudinal direction of the upper wall portion 60. In addition, rectangular piece-like extending portions 60 b and 60 b (hereinafter referred to as upper extending portions) are formed at both ends in the longitudinal direction of the upper wall portion 60, and the upper surface thereof is substantially the same as the upper surface of the upper wall portion 60. It is said to be on a plane. On the other hand, the side wall portion 61 has an inverted T shape in which extending portions 61a and 61a (hereinafter referred to as lower extending portions) extend from both longitudinal ends of the lower half portion thereof.

  As shown in FIG. 3, the fixing bracket 6 has a lower end edge of the upper extending portion 60 b at each end in the longitudinal direction of the round pipe 50. The upper edge of the lower extension portion 61a is engaged with the lower end of the outer peripheral surface of each of the round pipes 50 from below and is engaged. A pair of upper and lower extending portions 60 b and 61 a are fitted between the two round pipes 50 and 50 in a state where the upper and lower extension parts 60 b and 61 a are respectively engaged with the outer peripheral surface of the round pipe 50.

  Here, as can be seen from FIGS. 3 and 4B, the upper extending portion 60b of the fixing metal upper wall 60 extends toward the outer peripheral surface (arc surface) of the round pipe 50 that gradually recedes toward the upper side. Thus, it is in a relatively shallow locking state in which the lower end of the edge abuts. On the other hand, the lower extending portion 61a extends below the round pipe 50 from the intermediate side to the opposite side (hereinafter also referred to as the outside), and is in a relatively deep locking state in contact with the lower end of the outer peripheral surface. ing. Positioning of the fixing bracket 6 with respect to the round pipe 50 is performed by the contact between the lower extending portion 61 a and the lower end of the outer peripheral surface of the round pipe 50.

  That is, as apparent from the axial center of the round pipe 50 as shown in FIG. 4B, the upper extension 60b (ie, the upper wall 60) extends from the upper edge of the lower extension 61a. The length d in the vertical direction up to the upper surface is smaller than the diameter D of the round pipe 50 (shown in phantom in the figure) by a predetermined dimension α (for example, about 0.5 to 1 mm). The upper surface of the upper wall portion 60 of the fixture 6 is positioned below the upper end of the outer peripheral surface of the round pipe 50 by the predetermined dimension α.

  Therefore, when the pump unit P is mounted on the gantry 1, the lower surface of the pump unit P is mounted on the upper end of the round pipe 50 that is the slide rail 5, and the lower surface of the pump unit P and the upper surface of the fixing bracket 6 are A gap corresponding to the predetermined dimension α is formed in between. Therefore, even when the pump unit P is mounted, the fixing fitting 6 can be slid along the slide rail 5 so that the bolt insertion hole 60a can be easily aligned with the bolt mounting hole of the pump unit P.

  As described above, the gap formed between the lower surface of the pump unit P mounted on the slide rail 5 and the upper surface of the fixing bracket 6 decreases as the mounting bolt 62 is tightened, and the upper wall of the fixing bracket 6 If the part 60 bends greatly, it may contact the lower surface of the pump unit P. Therefore, if the clearance α is too small, the friction force between the lower surface of the pump unit P and the upper end of the outer peripheral surface of the round pipe 50 is insufficient, and the pump unit P is fixed when a large external force is applied due to, for example, an earthquake. The metal fitting 6 may move along the slide rail 5 and the position may be shifted. On the other hand, if the gap α is too large, the upper wall portion 60 may be largely bent (plastic deformation) and may not return, and the dimension α is set to, for example, about 0.5 to 1 mm in consideration of them.

  In this embodiment, as described above, the fixture 6 fitted between the round pipes 50, 50 of the slide rail 5 can be easily attached and detached. That is, as shown in FIG. 3 and FIG. 4 (a), two corners diagonally facing the upper wall portion 60 of the fixing bracket 6 (the left rear corner portion and the right front side of the upper wall portion 60 in FIG. 3). The notches 60c and 60c are formed over the upper extending portions 60b and 60b and the side wall portions 61 and 61, respectively, and the length L in the diagonal direction of the fixture 6 connecting these corners is The distance S between the round pipes 50 and 50 (see FIG. 5) is substantially the same.

  For example, when fitting the fixing bracket 6 between the two round pipes 50, 50, first, the longitudinal direction thereof is inserted in the direction of the axis of the round pipes 50, 50 from below, and then, as shown in FIG. As shown by the arrow, it is rotated clockwise as viewed from above (in the direction of tightening the right screw). At this time, the upper edge of the downwardly extending portion 61a of the fixing bracket 6 is in sliding contact with the lower end of the outer peripheral surface of the round pipe 50, while the upper portion of the upper extending portion 60b of the upper wall portion 60 has a lower end of the round pipe 50. The outer peripheral surface of the slab is contacted obliquely from above, and gradually bends while sliding along this surface.

  When the diagonal direction connecting the two corners of the rotating fixture 6 thus rotated becomes the direction in which the two round pipes 50 and 50 are arranged (a direction substantially perpendicular to the axis thereof), the length in the diagonal direction is increased. Since the length L is substantially the same as the interval S between the round pipes 50, 50, if a certain level of force is applied to the fixing bracket 6, it is further rotated to form the round pipes 50, 50 as shown in FIG. It can be inserted between. Once fitted in this way, the fixture 6 is difficult to drop off even if it is rotated in the opposite direction.

  Furthermore, in this embodiment, as shown in a slightly exaggerated manner in FIG. 4B, a non-rotating projection 61b is formed on the upper edge of the lower extension 61a. As described above, when the fitting 61b is rotated between the two round pipes 50 and 50 by rotating the fixing bracket 6 with a certain level of force as described above, the projection 61b gets over the lower end of the outer peripheral surface of the round pipe 50, and It comes into contact with the outer peripheral surface of the round pipe 50 from the diagonally lower side (the side opposite to the mating round pipe 50). In this state, the protrusion 61b regulates the rotation of the fixing bracket 6 in the opposite direction to the above, and can prevent the fixing bracket 6 from falling off more reliably.

  By the way, when the notches 60c and 60c are formed at the two corners of the fixing metal 6 as described above, in this embodiment, as described above, the left corner and the right front corner of the upper wall 60 in FIG. In other words, the upper wall 60 of the fixture 6 is viewed from one side in the longitudinal direction (left side or right side in FIG. 3 or FIG. Notches 60c and 60c are formed in the right corner, respectively.

  This is for the purpose of turning the fixing bracket 6 when it is fitted between the round pipes 50 and 50 as described above to turn the right-handed screw. The work of fastening to the lower part of the pump unit P is facilitated. That is, when the mounting bolt 62 inserted through the bolt insertion hole 60a of the fixing bracket 6 or the nut screwed to the mounting bolt 62 is tightened, the direction of the rotational force applied to the fixing bracket 6 is determined by the round pipe 50 as described above. This is because there is no fear that the fixing bracket 6 will drop off at this time.

  Furthermore, in this embodiment, only a solid line is shown in FIG. 2, and extends from the upper surface of the fixing metal fitting 6 fitted between the two round pipes 50, 50 as described above to the outer peripheral surfaces of the adjacent round pipes 50, 50. The metal plate member 7 is placed so as to cover them. The plate member 7 includes a rectangular upper wall portion 70 that is long in the longitudinal direction of the fixing bracket 6, and a side wall portion 71 that hangs down from one side in the width direction. Is overlapped with the inner side surface of the side wall portion 61 (the surface on the side of another fixing bracket 6 adjacent in the lateral direction).

  On the other hand, on the other side in the width direction of the upper wall portion 70 of the plate member 7, a bulging portion is formed outward from the middle portion in the longitudinal direction. A hole 70a is opened, and a bolt insertion hole 60a on the upper surface of the fixing bracket 6 faces the circular hole 70a. Further, both end portions in the longitudinal direction of the upper wall portion 70 of the plate member 7 are gently curved along the outer peripheral surfaces of the round pipes 50 and 50, respectively.

  If the plate member 7 is thus placed, the lower portion of the pump unit P can be protected. That is, as described above, in the pump vibration isolator A of this embodiment, the upper surface of the fixing bracket 6 where the insertion hole 60a of the mounting bolt 62 opens is slightly below the upper end of the outer peripheral surface of the round pipe 50 of the slide rail 5. Therefore, the lower surface of the pump unit P is in a line contact state with the upper end of the outer peripheral surface of the round pipe 50, and the load of the pump unit P due to its own weight and vibration acts on the linear contact site. It will be. Therefore, if the lower part of the pump unit P is a casting, cracks are likely to occur, and there is a concern about a decrease in durability.

  On the other hand, if the metal plate member 7 such as a steel plate or an aluminum plate is placed over the outer peripheral surface of the round pipe 50 from the upper surface of the fixture 6 as described above, the pump placed thereon By avoiding the concentration of the load on the lower surface of the unit P, it is possible to prevent the problem of durability. In addition, by placing an elastic sheet member such as a rubber sheet on the upper surface of the fixing bracket 6, the concentration of the load on the lower surface of the pump unit P can be reduced.

  In contrast to the upper gantry 1 configured as described above, the lower gantry 2 arranges frame members 20 and 20 made of the same square pipe as the frame member 4 of the upper gantry 1 in the vertical direction, and connects both ends thereof. As described above, the horizontal connecting members 21 and 21 are bridged to form a rectangular frame. The connecting member 21 can be the same as the round pipe 50 constituting the slide rail 5 of the gantry 1, and a gas pipe having a diameter smaller than that of the round pipe 50 is used in the illustrated example.

  As is clear from FIG. 2, the frame member 20 of the lower frame 2 is longer than the frame member 4 of the upper frame 1, and both end portions thereof extend outward from the end portions of the frame member 4 of the upper frame 1. It protrudes. A mounting bracket 22 to the foundation formed by bending the plate material is fitted to each end of the projecting frame member 20, and the end of the connecting member 21 is made using this mounting bracket 22. It is fixed (fitted).

  Further, an anti-seismic stopper 8 is disposed between each end of the frame member 20 of the lower mount 2 and each end of the frame member 4 of the upper mount 1, that is, at each of the four corners of the pump vibration isolator A. Yes. As shown in an enlarged view in FIG. 6, the earthquake-resistant stopper 8 has stopper bolts 80 arranged so that the shaft portion extends upward at each end of the frame member 20 of the undercarriage 2. The head is located inside the frame member 20 and is fastened to the upper wall of the frame member 20 by nuts 81 and 82 that are screwed into the lower portion of the shaft portion.

  Correspondingly, a vertical wall portion of an upper bracket 83 formed by bending a plate material in an L-shaped cross section is fixed to each end portion of the frame member 4 of the upper base 1 by welding or the like, and is attached to the lower end of the vertical wall portion. The upper side of the shaft portion of the stopper bolt 80 is inserted into a through hole formed in the connecting lateral wall portion in a loosely fitted state. In addition, a hook-shaped anti-sway member 84 is attached to an intermediate portion of the shaft portion of the stopper bolt 80 so as to be separated from the lower surface of the upper bracket 83. On the other hand, an annular rubber bush 85 is disposed on the upper surface of the upper bracket 83, and a nut 86 is screwed onto the upper end of the shaft portion of the stopper bolt 80 above it.

  A plain washer 87 is interposed between the nut 86 and the rubber bush 85, and both are in contact with each other in the figure. However, when used, the position of the nut 86 is adjusted so that it is between the plain washer 87. A gap having an appropriate size (about 2 to 3 mm) is formed. In this way, even if the foundation is shaken due to an earthquake or the like, the displacement of the upper bracket 83 relative to the stopper bolt 80 is limited between the anti-sway member 84 and the nut 86, and the vertical shaking of the upper base 1 is restricted. .

  In this embodiment, a total of four isolators 3, 3,... Are provided between the frame member 4 of the upper frame 1 and the frame member 20 of the lower frame 2 as shown in FIG. However, this may be 6 or more. Further, as the isolator 3, for example, a coil spring and a rubber integrally molded or a weather resistant resin case in which a coil spring is incorporated can be used.

  Therefore, according to the pump anti-vibration table A configured as described above, the upper frame 1 and the lower frame 2 are respectively connected to the frame members 4 and 20 made of square pipe, the slide rail 5 made of round pipe, and the connecting member 21. Since it comprises, only changing the cutting length of those pipes can change an external dimension according to the magnitude | size of the pump unit P at comparatively low cost.

  Further, when installing the pump unit P, first, the pump unit P is mounted after adjusting the approximate positions of the slide rail 5 and the fixing bracket 6 of the gantry 1 according to the bolt mounting holes. Thus, even when the pump unit P is mounted on the gantry 1, there is a sufficient space for putting a hand downward between the round pipes 50, 50 of the slide rail 5. Since the pump unit P is placed on the round pipe 50 and there is a gap between the lower surface thereof and the upper surface of the fixing metal 6, the fixing metal 6 is slid to attach the bolt insertion hole 60a to the pump unit P. Can easily fit into the hole.

  Further, in this embodiment, the structure of the fixing bracket 6 is devised so that it is not easily dropped from between the round pipes 50, 50 of the slide rail 5, and is simply inserted and turned from below as described above. Can be easily fitted, and can be easily removed by following the reverse procedure. This also facilitates the work for installing the pump unit P.

  In addition, this invention is not limited to the structure of the said embodiment, The other various structure is included. That is, in the said embodiment, although the board member 7 for protecting the lower part of the pump unit P is arrange | positioned on the fixed metal fitting 6, this does not need to be.

  Further, the specific structure of the fixing bracket 6 may be different from that of the above-described embodiment. For example, there are various structures for detachably fitting it between the round pipes 50 and 50 of the slide rail 5. Conceivable. Further, the fixing bracket 6 is not necessarily removable from the slide rail 5.

  Furthermore, in the above embodiment, the upper frame 1 is provided with two vertical frame members 4 and two horizontal slide rails 5 respectively. However, the present invention is not limited to this, and when a relatively large pump unit is installed. As shown in FIG. 7, three or more frame members 4 and three slide rails 5 can be used. Even in such a case, only the number of parts is increased and, for example, a separate press die is not required to manufacture the parts, so that the manufacturing cost of the pump vibration isolation table A does not increase significantly.

  Furthermore, the anti-vibration stand according to the present invention is not limited to the pump anti-vibration stand A as in the above embodiment, and can be applied as an anti-vibration stand for various equipment such as air conditioners such as chillers and boilers. It is.

  As described above, the present invention can change the external dimensions at a relatively low cost in accordance with the size of equipment such as a pump unit, and is easy to install such equipment. It is useful as a general-purpose anti-vibration mount.

FIG. 4 is a plan view (a), a front view (b), and a right side view (c) of the pump vibration isolator. It is the perspective view which expanded a part of pump vibration isolator and was seen from the upper diagonally forward. It is a perspective view of the fixing metal fitting inserted between the round pipes of a slide rail. FIG. 3 is a plan view (a) and a side view (b) of the fixing bracket. It is explanatory drawing which shows the procedure which inserts a fixing metal fitting. It is an enlarged view of a seismic stopper. FIG. 2 is a view corresponding to FIG. 1A according to another embodiment in which three frame members and three slide rails are provided on the upper frame.

Explanation of symbols

A Pump anti-vibration table (anti-vibration stand)
P Pump unit (equipment)
1 Upper base 2 Lower base 3 Isolator (anti-vibration body)
4 Frame member 5 Slide rail 50 Round pipe 51 Bracket 51a Bolt insertion hole 6 Fixing bracket 60 Upper wall part 60a Bolt insertion hole 60b Upper extension part 60c Notch 61 Side wall part 61a Lower extension part 61b Protrusion 7 Plate member

Claims (6)

A platform on which equipment is placed;
A lower base disposed at a predetermined interval below the upper base;
A vibration isolator with a plurality of vibration isolator interposed between the upper frame and the lower frame to reduce transmission of vibration from the device,
The upper pedestal includes a plurality of frame members extending in the vertical direction, and a slide rail including a pair of round pipes bridged between them in the horizontal direction.
At least two of the slide rails are spaced apart from each other in the vertical direction of the gantry, and each end is fixed to the frame member so that the position of the slide rail is adjustable, and between the two round pipes paired with each other. Is fitted with a slidable fixing bracket,
The anti-vibration feature is characterized in that the upper surface of the fixing bracket is substantially flat and is positioned below the upper end of the outer peripheral surface of the round pipe by a predetermined dimension, and an insertion hole for a mounting bolt is opened there. Mount. The fixing bracket is passed between two round pipes that make a pair, and a pair of upper and lower extending portions provided at both ends are respectively locked to the outer peripheral surface of the round pipe,
The upper extending portion abuts against the outer peripheral surface of each round pipe from an oblique upper side on the middle side, which is the side of the mating round pipe, while the lower extending portion is connected to each round pipe. The anti-vibration stand according to claim 1, which is in contact with the outer peripheral surface of the base plate from diagonally below or directly below the intermediate side. The fixing bracket is formed by bending a plate material so as to have a rectangular upper wall portion whose longitudinal direction is substantially perpendicular to the axis of the round pipe and side wall portions depending from both sides in the width direction. And
A rectangular piece-like upper extending portion is formed continuously at both ends in the longitudinal direction of the upper wall portion, and
Looking at the upper wall from either side in the longitudinal direction, each of the front left corner and the back right corner is formed with a notch across the upper extension and the side wall, The anti-vibration mount according to claim 2, wherein a length in a diagonal direction connecting the corners is substantially the same as a distance between two paired round pipes.   4. The prevention member according to claim 2, wherein a protrusion is formed on the lower extension portion of the fixing bracket so as to come into contact with the outer peripheral surface of the round pipe from an obliquely lower side opposite to the intermediate side. Shaking table.   The anti-vibration stand according to any one of claims 1 to 4, wherein a metal plate member is placed from the upper surface of the fixture to the outer peripheral surface of the round pipe.   The anti-vibration stand according to any one of claims 1 to 5, wherein the upper stand includes at least one of a frame member and a slide rail.

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