JP2014137094A - Vibration reduction device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration reduction device which is simple and stably exhibits a vibration reduction processing function and a fall-down prevention function of an object to be reduced in vibration against small vibration and a large impact force.SOLUTION: A vibration reduction device comprises: a lower bracket 30 fixed to an installation face G; a mounting board 70 laid between the lower bracket 30 and the installation face G, and blocking a lower face opening 34a of a lower guide part 33; a vibration absorbing material 50 composed of an elastic member which is sandwiched by an upper bracket 20 and the lower bracket 30; a connecting member 40 fixed to the upper bracket 20 and vertically penetrating the vibration absorbing member 50 and the lower guide part 33 arranged at the lower bracket 30; and a lower fixed part 41 arranged at a lower part of the connecting member 40 and accommodated in a space 36. A clearance S12 is formed between an upper face 41e of the lower fixed part 41 and a ceiling 33a of the lower guide part 33 of the lower bracket 30, and a clearance S11 is formed between a lower face 40d of the lower fixed part 41 and the mounting board 70.

Description

  The present invention is interposed between a floor surface of a building or the like and a vibration-reducing object having a weight ranging from 200 kg to 4 tons, such as a molded transformer, and the object to be reduced due to the occurrence of a large earthquake. The present invention relates to a seismic reduction device with improved anti-seismic processing performance to prevent falling.

  Conventional anti-vibration equipment suppresses shock and vibration when an earthquake occurs by interposing an anti-vibration device between the installation surface such as the floor or ground of the building and the object of vibration reduction such as a generator or mold transformer. Like to do. If small vibrations are generated from a small earthquake caused by a small earthquake or a vibration-reducing object itself due to operation, they are absorbed to suppress the transmission of shocks and vibrations, but are set in advance. It was possible to cope only within the range of the processing capacity of the vibration device.

  For this reason, a vibration isolator configured to cope with impacts and vibrations of various sizes is known. For example, it is equipped with a combination of various anti-vibration measures such as anti-vibration rubber, leaf springs, shock absorbers, laminated seismic isolation rubber on the floor and around the cab of a work machine such as a hydraulic excavator that transmits impact force Thus, there has been proposed one that improves riding comfort by preventing vibration and rolling (see, for example, Patent Document 1).

  However, in this case, many kinds of anti-vibration measures are required to reduce the vibration, so that a lot of installation space is required and there is a problem that it becomes a large scale.

JP-A-6-42012

  Therefore, the present invention has an anti-seismic processing performance for performing stable anti-vibration processing against a small vibration and a large impact force and an overturning prevention performance of an object to be reduced, and can be configured simply. The purpose is to provide a vibration damping device.

The invention described in claim 1 (FIG. 3) is a vibration reduction device 10 interposed between the installation surface G and the vibration reduction object M,
An upper bracket 20 fixed to the object to be reduced in vibration M,
A lower bracket 30 that includes a lower guide portion 33 that bulges upward, has a lower surface open, and has a space 36 formed therein, and is fixed to the installation surface G;
A mounting board 70 laid between the lower bracket 30 and the installation surface G and closing the lower surface opening 34a of the lower guide portion 33;
A vibration absorbing member 50 made of an elastic member sandwiched between the upper bracket 20 and the lower bracket 30;
A connecting member 40 fixed to the upper bracket 20 and penetrating in a vertical direction through the vibration absorber 50 and the lower guide portion 33 provided in the lower bracket 30;
A lower fixing portion 41 provided at a lower portion of the connecting member 40 and housed in the space portion 36;
A clearance S12 is provided between the upper surface 41e of the lower fixing portion 41 and the ceiling portion 33a of the lower guide portion 33 of the lower bracket 30, and a clearance is provided between the lower surface 40d of the lower fixing portion 41 and the mounting board 70. S11 is provided.

  The invention described in claim 2 (FIG. 4) is characterized in that, in claim 1, “the elastic shock absorbing member 60a is sandwiched in the gap S12”. Since the shock absorbing member 60a is compressed and deformed when the lower fixing portion 41 is tilted at the time of earthquake input, the shock absorbing member 60a has the same effect as the gap S12 in the deformation range. Therefore, the thickness of the shock absorbing member 60a is represented as the gap S12.

  The invention described in claim 3 (FIG. 5) is that in claim 1, “the hard tilt adjustment member 60 b is sandwiched in the gap S <b> 12 without contact with the ceiling portion 33 a of the lower guide portion 33 of the bracket 30. It is characterized by that. Since the tilt adjusting member 60b is formed of a hard member, when the lower fixing portion 41 tilts at the time of an earthquake input, the end portion of the tilt adjusting member 60b collides with the ceiling portion 33a of the lower guide portion 33 of the lower bracket 30. It will work as a part of the lower fixing portion 41.

  The invention described in claim 4 is characterized in that, in claim 2, "the tilt adjusting member 60b is further sandwiched along the impact absorbing member 60a".

  According to the first aspect of the present invention, the vibration absorbing member 50 can absorb the small vibrations elastically between the upper bracket 20 and the lower bracket 30 so as to absorb the small vibrations, so that a large external force such as an earthquake can be obtained. In contrast, the end portion of the lower surface 40d of the lower fixing portion 41 tilted together with the upper bracket 20 mounted on the vibration reduction object M is pressed against the mounting board 70, and at the same time, the upper surface 41e (or the upper surface 41e of the tilt adjusting member 60b). ) Is pressed against the lower surface of the ceiling portion 33a of the lower guide portion 33 of the lower bracket 30 directly or via the shock absorbing member 60a, and the tilting of a predetermined angle θ or more is restricted. It is possible to prevent the seismic reduction object M rolling within the angle θ from falling.

  Further, since the tilt adjusting member 60b is sandwiched in place of or together with the shock absorbing member 60a, the gaps S11 and S12 can be made variable by adjusting the thickness of the tilt adjusting member 60b. The angle θ can be adjusted.

  In addition, since the vibration absorbing material 50 is interposed between the upper and lower brackets 20 and 30 supported by the connecting member 40 and the lower fixing portion 41 is accommodated in the space portion 36, the installation space is small. The number of parts is small and can be manufactured at low cost.

It is a top view which shows Example 1 of the vibration isolator of this invention. It is a front view of FIG. It is a longitudinal cross-sectional view of FIG. It is a longitudinal cross-sectional view which shows Example 2 of the vibration isolator of this invention. It is a longitudinal cross-sectional view which shows Example 3 of the vibration isolator of this invention. It is a longitudinal cross-sectional view which shows Example 4 of the vibration isolator of this invention. FIG. 6 is a cross-sectional view when the vibration isolator of FIG. 5 is tilted. FIG. 6 is an exploded longitudinal sectional view of the vibration isolator of FIG. 5. It is a side view half sectional view which shows the state which fixed the vibration isolator of FIG. 5 to the vibration reduction target object.

  Hereinafter, the vibration damping device 10 of the present invention will be described with reference to FIGS. 1 to 3 (Example 1). As shown in FIG. 9, the vibration isolator 10 is provided between an installation surface G such as a building or the ground and a vibration reduction object M having a weight of 200 kg to 4 tons, such as a large mold transformer. Is intervened. In addition, the vibration generated by the operation of the seismic reduction object M is normally prevented from being transmitted to the installation surface G, and an external force is transmitted from the installation surface G side to the vibration reduction object M in an emergency such as an earthquake, In order to prevent this from rolling and falling, the upper bracket 20, the lower bracket 30, the mounting board 70, the connecting member 40, the upper fixing portion 42, the vibration absorbing material 50, and the lower fixing portion 41. It is configured with.

  The upper bracket 20 includes a vertical plate 23, a concave horizontal plate 24, and an upper guide portion 25. First, the vertical plate 23 is a horizontally long vertical rectangular plate, and is provided with attachment portions 21 for fixing to the vibration reduction object M on both sides thereof. The attachment portion 21 is formed at an appropriate position on the lower side surface of the vibration reduction object M by inserting a hexagon bolt 21c into which a flat washer 21a and a spring washer 21b are inserted into the long holes 22 opened on both sides of the rectangular plate. It is attached to the side surface of the vibration reduction object M by fastening to a screw hole (not shown).

  The concave horizontal plate 24 extends horizontally in the center of the front surface of the vertical plate 23, and is provided in a concave shape by bending both sides upward in order to increase the strength of the horizontal plate 24. Further, the central portion of the extended horizontal portion is opened, and the upper end of the cylindrical upper guide portion 25 is fixed to the opening portion by, for example, welding. And the internal thread 26 which the external thread 40b of the connection member 40 mentioned later is screwed together is formed in the cylindrical inner peripheral surface. (Of course, the female screw 26 is not engraved, and it may be a simple through hole.) The lower end portion of the upper guide portion 25 formed in a cylindrical shape is provided as the upper movement restricting portion 27 of the connecting member 40 described later. .

  The lower bracket 30 is composed of a flat plate 32 and a lower guide portion 33, and the flat plate 32 is a horizontally long rectangular plate, which will be described later via mounting surface mounting attachment portions 31 formed on both sides thereof. It overlaps with the board 70 and is fixed to the installation surface G. As shown in FIGS. 1 and 2, hexagonal bolts 31c each having a flat washer 31a and a spring washer 31b are inserted into base holes 32a opened at four corners of the flat plate 32. The flat plate 32 of the lower bracket 30 is fixed to the upper surface of the installation surface G via the mounting board 70 by fastening to a screw hole (anchor) (not shown) formed on the upper surface of the installation surface G.

  The lower guide portion 33 is a hollow portion that bulges upward in the center of the flat plate 32 described above. The lower guide portion 33 has a lower surface opening 34 a, a space portion 36 is formed inside, and a ceiling of the space portion 36 is formed. It has an insertion hole 35 which is opened at the center of the portion 33a and allows the above-described upper guide portion 25 to be inserted from above. A lower end portion of the upper guide portion 25 inserted through the insertion hole 35 is the upper movement restricting portion 27, and a circular insertion hole that allows the upper movement restricting portion 27 to face the space portion 36 of the lower guide portion 33. 35 is drilled in the center of the lower guide portion 33. In addition, the lower guide part 33 may be integrally formed by press work etc., and as shown in FIG. 3, the flat plate 32 and the lower guide part 33 may be integrally formed by welding.

  The mounting board 70 described above is a rectangular plate having the same outer shape as the flat plate 32 of the lower guide portion 33, and is configured by opening base holes 32 b corresponding to the base holes 32 a of the flat plate 32 at four corners. It is provided as a cover plate that closes the lower surface opening 34a of the lower guide portion 33 on the upper surface of the central portion, and is fixed to the upper surface of the installation surface G so as to overlap with the lower side of the flat plate 32. Although not shown, since the mounting board 70 is for closing the lower surface opening 34a of the lower guide portion 33, it may be formed with the same diameter as the lower surface opening 34a and screwed.

  The connecting member 40 includes a columnar main body 40a made of metal or the like, and a male screw 40b that is screwed into the female screw 26 described above is formed on the outer peripheral surface of the main body 40a. Further, a locking portion 40c of a metal disk having an outer diameter larger than that of the main body 40a is integrally formed at the lower end portion in the axial direction of the main body 40a by a joining means such as welding. Of course, you may form the latching | locking part 40c in one end at the connection member 40 by a method like swaging. A driver groove 40e is formed on the top of the main body 40a.

  The locking portion 40c provided at the lower portion of the connecting member 40 is inserted into the space portion 36 on the lower bracket 30 side, and a sufficient gap S2 is provided between the inner peripheral surface of the space portion 36 and the outer periphery of the locking portion 40c. It is formed in a size that can be secured. And when this latching | locking part 40c is FIG. 3, it will become the lower fixing | fixed part 41 which makes the tilt control effect mentioned later in the space part 36 by the side of the lower bracket 30. FIG. In FIGS. 5 and 6, the lower fixing portion 41 is formed with a tilt adjustment member 60 b described later.

  In this embodiment, the upper fixing portion 42 is a nut 42c, and the connecting member 40 is screwed into the insertion hole 35 of the lower guide portion 33 and the female screw 26 of the upper guide portion 25 (the female screw 26 is cut into the upper guide portion 25). If it is not provided, simply insert it) and project the upper end of the connecting member 40 above the horizontal plate 24, and insert the flat washer 42 a and the spring washer 42 b into the upper end of the connecting member 40. The nut 42c is screwed and fastened and fixed. Of course, the upper fixing portion 42 is not limited to the nut 42c, and any member that can fix the connecting member 40 to the upper guide portion 25 may be used.

  As shown in FIG. 8, the vibration absorbing member 50 is formed into a cylindrical shape with an outer flange made of an elastic material such as synthetic rubber or low-resilience rubber suitable for vibration absorption, and the outer flange portion is a large diameter portion 50a. The lower cylindrical part is the small diameter part 50b. Then, the inner peripheral surface of the vibration-absorbing material 50 of the tubular body with the outer collar is fitted and attached to the outer peripheral surface of the upper guide portion 25. At this time, the upper large-diameter portion 50 a is interposed between opposing surfaces in the vertical direction between the lower surface of the horizontal plate 24 and the upper surface of the lower guide portion 33. On the other hand, the lower small-diameter portion 50b is interposed between the radially opposing surfaces of the outer peripheral surface of the upper guide portion 25 and the insertion hole 35 having a smaller diameter.

  Next, when the vibration damping device 10 is assembled, the upper guide portion 25 is inserted into the lower bracket 30 from above with the vibration absorbing material 50 fitted on the outer peripheral surface of the upper guide portion 25 on the upper bracket 20 side. Push into hole 35. In this state, the connecting member 40 is screwed into the upper guide portion 25 of the upper bracket 20 from the lower guide portion 33 side of the lower bracket 30 (if the female screw 26 is not engraved in the lower guide portion 33, it is inserted as it is) to connect. The upper part of the member 40 is protruded above the upper bracket 20. Then, a plain washer 42a and a spring washer 42b are fitted and tightened with a nut 42c which is an upper fixing portion 42.

  As a result, the locking portion 40c, which is the lower fixing portion 41, contacts the upper movement restricting portion 27 at the lower end of the upper guide portion 25 of the upper bracket 20, and the upper bracket 20 and the lower bracket 30 are fixed through the connecting member 40. . At this time, a gap S <b> 12 is formed between the locking portion 40 c which is the lower fixing portion 41 and the ceiling surface 36 a of the ceiling portion 33 a of the lower guide portion 34. At the same time, the large diameter portion 50 a of the vibration absorbing material 50 is sandwiched between the lower surface of the horizontal plate 24 of the upper bracket 20 and the upper surface of the ceiling portion 33 a of the lower guide portion 34, and the small diameter portion 50 b extends around the outer periphery of the lower guide portion 34. It surrounds and prevents contact with the lower guide portion 34. The lower end of the small diameter portion 50b may be formed so as to be separated from the upper surface 41e of the locking portion 40c which is the lower fixing portion 41 as shown in FIG. .

  Further, a gap S <b> 11 is formed between the locking portion 40 c and the upper surface 71 of the mounting board 70. It is preferable that the gap S11 and the gap S12 are set to have the same size, because the corner located at the opposite corner of the locking portion 41c collides with the ceiling portion 33a and the mounting board 70 at the same time. If the difference is not large, they may be different. As described above, the locking portion 40c is separated from the inner surface of the lower guide portion 34 and the upper surface 71 of the mounting board 70 by the gaps S11, S12, and S2. When the female screw 26 is engraved on the upper guide portion 25, the connecting member 40 is rotated by inserting a driver into the driver groove 40e and turning it.

  When using the vibration reducing device 10, as shown in FIG. 9, the mounting board 70 is overlaid on the lower side of the lower bracket 30, and the four corners are attached to the installation surface G by the attachment portions 31. Thus, the vibration isolator 10 is fixed to the installation surface G through the lower bracket 30. On the other hand, by attaching the both sides of the vertical plate 23 of the upper bracket 20 to the lower side surface of the vibration reduction object M by the attachment portions 21, the vibration reduction device 10 is fixed to the vibration reduction object M through the upper bracket 20. . This vibration reduction device 10 supports a single vibration reduction object M by attaching a necessary number of vibration reduction objects M around the vibration reduction object M suitable for supporting the vibration reduction object M.

  When the vibration reduction object M is operated, vibration is generated in itself, and the upper bracket 20 vibrates in response to the vibration, but the vibration absorber 50 of the vibration reduction device 10 absorbs the vibration and moves to the installation surface G. Inappropriate vibration transmission can be suppressed. During this time, the locking portion 40 c maintains a separated state with respect to the lower guide portion 33 and the mounting board 70. Even when a small shaking such as a small earthquake occurs, the external force to be transmitted from the lower bracket 30 side to the upper vibration reduction object M is caused by the vibration absorbing action based on the elasticity of the vibration absorbing material 50 to the upper bracket 20 side. It is possible to prevent an adverse effect on the seismic reduction object M from being adversely affected by suppressing the transmission of improper shaking to the object and keeping the separated state slightly rolling the seismic reduction object M.

  When a large earthquake occurs, a large external force is directly transmitted from the installation surface G side to the lower bracket 30, and the seismic reduction object M is shaken in all directions, front and rear, left and right, up and down, and tries to roll greatly. At this time, FIG. 7 (FIG. 7 shows the tilted state of the third embodiment. However, since the tilt adjusting member 60b and the locking portion 40c, which will be described later, work together as the lower fixing portion 41, The upper bracket 20 and the connecting member 40 are tilted together with the vibration-reducing object M that rolls as in the description of the first embodiment, and the vibration absorbing material 50 is repeatedly compressed.

  As a result, part of the seismic energy is converted to heat and attenuated accordingly. Then, the lower surface 40d of one end of the lower fixing portion 41 (the bottom surface at the left end in the figure) is placed on the upper surface 71 of the mounting board 70 on the opposite side of the lower fixing portion 41 when the inclination is about to exceed a certain angle θ. The upper surface (the upper surface at the right end in the figure) collides with the ceiling surface 36a of the ceiling portion 33a of the lower guide portion 33 and stops tilting. The pressing point is indicated by a black circle. The relaxed impact is transmitted from the upper bracket 20 to the vibration reduction object M through the connecting member 40. When rolling, the black circles will be switched left and right at the pressing point. Thereby, although the shock load that has been absorbed by the vibration absorber 50 and weakened to some extent is applied to the seismic object M, the seismic object M due to rolling can be prevented. The horizontal vibration is absorbed and alleviated by the small diameter portion 50 b of the vibration absorbing material 50.

  FIG. 4 shows a second embodiment of the present invention, in which the shock absorbing member 60a is sandwiched between the elastic members such as synthetic rubber and low resilience rubber in the gap S12. In this case, when the nut 42c, which is the upper fixing portion 42, is tightened, the locking portion 40c is raised by pulling up the connecting member 40, and the shock absorbing member 60a is connected to the locking portion 40c and the ceiling portion as in the first embodiment. Sandwich 33a. The point that a gap S11 is formed between the upper surface 71 of the mounting board 70 is the same as in the first embodiment. Since the shock absorbing member 60a is formed of an elastic member as described above, it is deformed to some extent when the seismic object M as described above rolls and the locking portion 40c tilts (or moves up and down). Therefore, it functions substantially equivalent to the gap S12. Therefore, the portion of the impact absorbing member 60a in FIG. 4 is indicated as a gap S12. When the seismic object M rolls and the locking portion 40c tilts, the same action as in FIG. 7 occurs through the impact absorbing member 60a partially compressed. Meanwhile, the shock absorbing member 60a can obtain a vibration energy damping effect corresponding to the compression amount. The other points are the same as in the first embodiment.

  FIG. 5 shows a third embodiment of the present invention, in which a hard tilt adjusting member 60b such as iron or hard resin is sandwiched in the gap S12 without contact with the ceiling portion 33a of the lower guide portion 33 of the bracket 30. . Since the degree of rolling restriction of the vibration reduction object M is determined by the sizes of the gaps S11 and S12, it can be set to optimum or arbitrary sensitivity by adjusting the thickness of the tilt adjustment member 60b.

The tilt adjustment member 60b uses a material that can obtain rigidity. For example, it can be composed of a polymer disk such as a hard resin material or a metal disk such as iron and having rigidity. The tilt adjustment member 60 b has an outer diameter that matches the locking portion 40 c, and an inner diameter that matches the outer diameter of the upper guide portion 25 and is fitted into the upper guide portion 25. Although not shown, the inner diameter of the tilt adjustment member 60b may be made to coincide with the outer diameter of the connecting member 40, and the upper movement restricting portion 27 of the upper guide portion 25 may be in contact with the upper surface of the tilt adjustment member 60b. . The clearance S12 is the same as that of the first embodiment, and the tilt adjustment member 60b is mounted on the locking portion 40c and works as a unit. Therefore, the tilt adjustment member 60b and the locking portion 40c are moved downward. It becomes the fixing part 41. Also in this case, the gap S <b> 11 is formed between the upper surface 71 of the mounting board 70 as in the first embodiment, and the other points are the same as in the first embodiment.

In addition,

  FIG. 6 shows a fourth embodiment of the present invention, in which the tilt adjusting member 60b and the shock absorbing member 60a are sandwiched in the gap S12. The impact absorbing member 60a is provided on the tilt adjusting member 60b, and the upper and lower brackets 20 and 30 are cut at the impact absorbing member 60a. Also in this case, the impact absorbing member 60a functions substantially the same as the gap S12. Also in this case, the gap S <b> 11 is formed between the upper surface 71 of the mounting board 70 as in the first embodiment, and the other points are the same as in the first embodiment.

DESCRIPTION OF SYMBOLS 10 ... Damping device 20 ... Upper bracket 21 ... Mounting part 21a ... Plain washer 21b ... Spring washer 21c ... Hex bolt 22 ... Long hole 23 ... Vertical plate 24 ... Horizontal plate 25 ... Upper guide part 26 ... Female screw 27 ... Upper Movement restricting portion 30 ... Lower bracket 31 ... Mounting portion 31a ... Plain washer 31b ... Spring washer 31c ... Hex bolt 32 ... Flat plate 32a, 32b ... Base hole 33 ... Lower guide portion 33a ... Ceiling portion 34a ... Lower surface opening 35 ... Insertion hole 36 ... Space portion 36a ... Ceiling surface 40 ... Connecting member 40a ... Main body 40b ... Male screw 40c ... Locking portion 40d ... Lower surface 40e ... Driver groove 41 ... Lower fixing portion 41e ... Upper surface 42 ... Upper fixing portion 42a ... Plain washer 42b ... Spring washer 42c ... Nut 50 ... Vibration absorber 50a ... Large diameter part 50b ... Small diameter part 60a ... Shock absorbing member 60b ... Tilt adjusting member 70 ... Tower Board 71 ... mounting plate of the upper surface S11, S12, S2 ... gap G ... mounting surface M ... reduced Shin object theta ... fixed angle

Claims (4)

An upper bracket fixed to the object to be reduced, and
A lower bracket that bulges upward, has a lower guide that is open at the bottom, and has a space formed therein, and is fixed to the installation surface;
A mounting board that is laid between the lower bracket and the installation surface and closes the lower surface opening of the lower guide portion;
A vibration absorber made of an elastic member sandwiched between the upper bracket and the lower bracket;
A connecting member fixed to the upper bracket and penetrating in a vertical direction through a vibration absorbing material and a lower guide portion provided in the lower bracket;
A lower fixing portion provided at a lower portion of the connecting member and housed in the space portion;
A gap is provided between the upper surface of the lower fixing portion and the ceiling portion of the lower guide portion of the lower bracket, and a gap is provided between the lower surface of the lower fixing portion and the mounting board. To reduce vibration.   The vibration-reducing device according to claim 1, wherein an elastic shock absorbing member is sandwiched between the upper surface of the lower fixing portion and the ceiling portion of the lower guide portion of the lower bracket.   The hard tilt adjustment member is sandwiched between the upper surface of the lower fixing portion and the ceiling portion in a non-contact manner with the ceiling portion of the lower guide portion of the bracket. The described vibration reduction device. The vibration reducing device according to claim 3, wherein a tilt adjustment member is further sandwiched along the shock absorbing member.

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