JP2005344811A - Vibration control structure using oval coil spring - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an economic vibration control structure using an oval coil spring for lengthening the service life while smoothly transmitting displacement such as vibration, by using the oval coil spring having the high vibration and sound absorbing damping function in a state of lying on one's side, by increasing a defomation rate to a small load variation. <P>SOLUTION: This vibration control structure is characterized by selectively setting, overlapping and uniting any of upper and lower units of a first unit formed by sandwiching the oval coil spring 1 between upper and lower flanges and a second unit formed by sandwiching a bearing member 2 between the upper and lower flanges. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an anti-vibration structure using an oval coil spring widely used for seismic isolation and anti-vibration of mechanical devices, buildings, and structures.

  In general, flat springs, stacked leaf springs, torsion coil springs, spiral springs, bar torsion springs, cylindrical coil springs, conical coil springs, ring springs, and the like are known as springs, and rubber elastic bodies are used as vibration-proof materials. There are many examples to use.

  As an anti-vibration material used for an anti-vibration device, a material having an excellent function of absorbing and attenuating vibration and sound and a high strength is desired. Anti-vibration rubber, air springs, metal springs, etc. are known. For buildings, transportation and other engines, for example, anti-vibration rubber is attached to vehicles, machines and other equipment to propagate vibration. It is usually used for the purpose of vibration suppression such as prevention.

In addition, “a seismic isolation structure in which a plurality of soft elastic layers and rigid hard layers are alternately laminated, and the soft layer is a rubber material obtained by adding a xylene resin to a base polymer. Has been disclosed (for example, see Patent Document 1).
Japanese Patent Laid-Open No. 9-273592

  However, in the above-described conventional example, when a load is constantly applied to various rubber materials, a chemical reaction indicating elastic deterioration proceeds due to permanent compression strain, and the bridge forming the three-dimensional network structure is destroyed, resulting in functional deterioration. That is, the aging phenomenon occurs early in terms of material, and the life problem, economic problem, and maintenance problem cannot be solved.

  The present invention has been made in view of the above-described circumstances, and uses an oval coil spring having a large deformation rate and a high vibration and sound absorption / damping function for small load fluctuations in a recumbent state, and displacement such as vibration. An object of the present invention is to provide an economical anti-vibration structure using an oval coil spring with a longer life by providing a thrust bearing and a sliding member for smoothly transmitting the vibration.

  The present invention can solve the above problems by providing the following configuration.

  (1) Select one of the upper and lower ones of the first unit in which the oval coil spring is sandwiched between the upper and lower flanges and the second unit in which the bearing member is sandwiched between the upper and lower flanges. A vibration-proof structure using an oval coil spring formed by overlapping and combining.

  (2) The first unit has long grooves on the inner surfaces of the upper and lower flanges facing each other, and an oval coil spring is lying on the side, loosely fitted, and sandwiched between the paired upper and lower flanges. Concave portions are arranged at a predetermined pitch on the lower surface, which is the inner surface of the upper flange, and a long groove is formed on the upper surface, which is the inner surface of the opposed lower flange. The vibration isolation structure using the oval coil spring according to the preceding item (1), wherein the bearing unit is formed.

  (3) Select one of the upper and lower ones of the first unit in which the oval coil spring is sandwiched between the upper and lower flanges and the third unit in which the sliding member is sandwiched between the upper and lower flanges. A vibration-proof structure using an oval coil spring formed by overlapping and combining.

  (4) The first unit has long grooves on the inner surfaces of the upper and lower flanges facing each other, and an oval coil spring is lying on the side, loosely fitted, and sandwiched between the paired upper and lower flanges. The vibration-proof structure using the oval coil spring according to (3) above, wherein a sliding unit is formed by engaging and sliding a sliding member in a predetermined inner surface range between a pair of upper and lower flanges.

  By using an oval coil spring with a large deformation rate and a high vibration / sound absorption / damping function for small load fluctuations in a recumbent state, and by installing a thrust bearing and sliding member to smoothly transmit displacement such as vibration Therefore, it is possible to provide an anti-vibration structure using an oval coil spring that has an extended life and is economical.

  An embodiment of a vibration-proof structure using an oval coil spring according to the present invention will be described.

  1A and 1B are explanatory views showing an example of the configuration of the first embodiment, FIG. 1A is a plan view, FIG. 1B is a side sectional view, FIG. 1C is a partially cutaway perspective view of the main part, and FIG. 2 is an explanatory view showing an example of a configuration in FIG. 2, (a) is a plan view, (b) is a side sectional view, FIG. 3 is a side sectional view showing an example of a configuration in Example 3, and FIG. FIG. 5 is an explanatory view showing an example of the configuration, FIG. 5A is a side sectional view, FIG. 5B is a sectional perspective view of the main part, FIG. 5 is a side sectional view showing an example of the configuration in Example 5, and FIG. It is a sectional side view which shows an example of a structure in.

  In the first embodiment, the overall structure is cylindrical, and the bearing member 2 is a ball bearing using a spherical ball. As shown in FIG. An anti-vibration structure using an oval coil spring in combination with a member 2, wherein the oval coil spring 1 is recumbent, loosely fitted, and sandwiched between a pair of upper and lower flanges 3 and 4 having long grooves 5a and 6a on the inner surface. A concave unit 3a having an arcuate cross section that engages with the spherical surface of the ball, for example, is disposed at a predetermined pitch on the lower surface that is the inner surface of the upper flange 3 (see FIG. 1 shows a case where the inner surface of the upper flange 3 is equally divided into eight along the peripheral edge to provide a recess 3a, and eight balls are engaged and arranged in the recess 3a provided at a constant pitch. ) An annular long groove 4a having an arcuate cross section that engages with the arrangement of the balls is provided on the upper surface serving as the inner surface of the lower flange 4, and a bearing member (ball) 2 that engages with the recess 3a is fitted between the upper and lower flanges so as to be able to rotate. A second unit “B” forming a bearing unit is formed, and the first unit “A” and the second unit “B” are overlapped and combined. As is apparent from FIGS. 1B and 1C, the uppermost upper flange 3 and the lowermost lower flange 6 are disk-shaped, and the lower flange 4 and the upper flange serving as intermediate flanges. 5 shows an annular shape.

  The upper flange 3 at the uppermost part and the lower flange 6 at the lowermost part are both disk-shaped, and a bolt 7 having a male screw for fastening is erected at the center of the lower flange 6 at the lowermost part. A through hole 3b into which the bolt 7 can be loosely inserted is formed in the center of the flange 3, and the upper flange 5 of the first unit "I" and the lower flange 4 of the second unit "B" have the same plane. As shown in FIG. 1B, the flanges are stacked in a predetermined order, and a nut 8 is screwed onto the bolt 7 via a spring 10 and an upper washer 9, so that the vibration-proof structure is elastic. It is set as the structure fastened to.

  Regarding the other reference numerals, 4b and 5b are ring inner peripheral surfaces of the lower flange 4 and the upper flange 5 forming an annular flange. Reference numeral 7 a denotes a tip portion of the bolt 7.

  The operation will be described with reference to the above-described configuration and drawings.

  For example, when an anti-vibration structure using an oval coil spring according to the present invention is attached to a predetermined part of a mechanical device or a building, and an earthquake or other vibration occurs, first, when the uppermost upper flange 3 feels the vibration, The angle of inclination of the oval coil spring 1 lying on its side and being loosely fitted in the long grooves 5a and 6a is deformed in a direction in which the angle increases with respect to the vertical angle in proportion to the magnitude of the vibration. Almost simultaneously with the movement, the upper flange 5 of the first unit “I” and the lower flange 4 of the second unit “B” match the displacement of the oval coil spring 1 around the axis of the bolt 7 along the horizontal plane. In accordance with this movement, the ball-shaped bearing member 2 rotates following the rotation and returns to the initial position by the amount of rotation along the long groove 4a of the lower flange 4. Flange 3 on the top function The slightly moved up and down together with the machinery and buildings are No設 is immediately restored. At this time, the elastic state of the spring 10 incorporated for fastening does not cause an inconvenient state in which the fastening state is maintained and the structure collapses.

  The second embodiment is an example in the case of “* ro”, which is a modification of the second unit “ro” in the first embodiment. As shown in FIGS. This is an example in the case of changing from “thrust ball bearing” to “thrust roller bearing (bearing)”.

  An annular long groove (4-1) a that engages with the arrangement of the frusto-conical rollers and the curved surface of the frusto-conical rollers is provided on the upper surface, which is the inner surface of the lower flange 4-1, and the recess (3-1) a is provided. The bearing member (the frustoconical roller) 2-1 that engages with each other is fitted between the upper and lower flanges so as to be able to rotate, thereby forming a second unit “* ro”.

  Since other configurations and operations are the same as those in the first embodiment, the description thereof is omitted.

  About the code | symbol different from the case of Example 1, the upper flange of the 2nd unit "* ro" is 3-1, the long groove is (3-1) a, the through hole of the central part is (3-1) b, the second The lower flange of the unit “* ro” was 4-1; the annular long groove was (4-1) a; and the ring inner peripheral surface was (4-1) b.

  The third embodiment is an anti-vibration structure using an oval coil spring in which an oval coil spring 1 and a sliding member 12 are combined. The oval coil spring 1 is provided between a pair of upper and lower flanges 5 and 6 having long grooves 5a and 6a on the inner surface. A first unit “I” that forms a coil spring unit by lying down, loosely fitting, and sandwiching, and an inner surface predetermined range (3-2) a between the upper and lower flanges 3-2 and 4-2 as a pair, (4-2) A sliding unit 12 is engaged and extended on a to form a third unit “C” that forms a sliding unit, and the first unit “A” and the third unit “C” are It is characterized by overlapping.

  Fluorine resin or phenol resin is suitable for the sliding member 12, and in this embodiment, the upper flange 5 of the first unit “I” and the lower flange 4-2 of the third unit “C” are in an annular shape. It is a combined annular plate. Moreover, fillers, such as glass fiber and cloth, can be mixed to enhance mechanical properties such as tension and compression.

  As for the operation, the second units “B” and “* B” in the first and second embodiments are bearing members, which rotate to absorb and adjust the displacement. However, in the case of the sliding member of the third embodiment, the bearing Instead of rotating, the sliding function of the resin plate is used. Since other operations are the same as those in the first embodiment, a description thereof will be omitted.

  In addition, about the code | symbol different from the case of Example 1 and 2, the upper flange of 3rd unit "c" is 3-2, the contact surface with the sliding member 12 is (3-2) a, and the through-hole of center part is provided. (3-2) b, the lower flange of the third unit “C” is 4-2, the contact surface with the sliding member 12 is (4-2) a, and the ring inner peripheral surface is (4-2) b, sliding The inner peripheral surface of the ring of the member 12 is 12a.

  The fourth, fifth, and sixth embodiments to be described below are different from the configuration based on the circular arrangement of the first, second, and third embodiments described above in that the arrangement is a linear arrangement.

  The fourth embodiment is different from the circular configuration when viewed from the plane of the first to third embodiments described above, and has a linear arrangement. As shown in FIG. Both the flange 15 and the lowermost lower flange 18 have a square shape, and a bolt 7 having a male screw for fastening is erected in the vicinity of the center of the lowermost lower flange 18. Is formed with a through hole 15b into which the bolt 7 can be loosely inserted, and the upper flange 17 of the first unit “d” and the lower flange 16 of the second unit “e” are thin rectangles having the same plane. As shown in FIG. 4A, the flanges are stacked in a predetermined order, and nuts 8 are screwed onto bolts 7 via springs 10 and upper washers 9 to elastically fasten the vibration-proof structure. As a configuration.

  The concave portion 15a on the lower surface of the upper flange 15 has a shape that engages with the spherical surface, as in the first embodiment, but is arranged on a straight line at a predetermined pitch, and the upper surface of the lower flange 16 engages with the spherical surface. The linear long groove 16a is provided.

  The oval coil spring 13 is also arranged linearly, and the engagement grooves of the upper flange 17 and the lower flange 18 of the first unit “d” are also linear long grooves 17a and 18a.

  As for the other symbols, 16b and 17b are inner surfaces of the lower flange 16 and the upper flange 17 forming a thin rectangular flange, and 15b is formed in the vicinity of the center of the upper flange 15 of the second unit “e”. This is a through hole into which the bolt 7 can be loosely inserted.

  The operation will be described with reference to the above-described configuration and drawings.

  Note that a description of the same parts as those in the above embodiment is omitted.

  For example, when an anti-vibration structure using the oval coil spring according to the present invention is attached to a predetermined part of a machine or building, and an earthquake or other vibration occurs, the upper flange 15 first feels the vibration. The inclination angle of the oval coil spring 13 that is lying on the side and straightly fitted into the linear long grooves 17a and 18a is deformed in a direction in which the angle is increased with respect to the vertical angle in proportion to the magnitude of vibration. The upper flange 17 of the first unit “d” and the lower flange 16 of the second unit “e” move in parallel with the displacement of the oval coil spring 13 along the horizontal plane. In accordance with this movement, the ball-shaped bearing member 14 is rotated by following the parallel movement, and the initial state is the amount corresponding to the parallel movement along the long groove 16a of the lower flange 16. Upper flange 15 functions to the top back to just slightly moved up and down together with the machinery and buildings are No設 is immediately restored. At this time, the elastic state of the spring 10 incorporated for fastening does not cause an inconvenient state in which the fastening state is maintained and the structure collapses.

  This is a case where the bearing member 14 of the fourth embodiment is changed from a ball to a bearing member 14-1 forming a cylindrical roller, and the cylindrical roller is placed on the lower surface of the upper flange 15-1 of the third unit “* e”. Concave portions (15-1) a that engage with the curved surface of the bearing member 14-1 to be formed are provided at a predetermined pitch, and a linear long groove (16 that engages with the curved surface of the cylindrical roller on the upper surface of the lower flange 16-1. -1) a is provided, and the bearing member 14-1 that forms the cylindrical roller along the long groove (16-1) a is rollable.

  The sixth embodiment is a case where the above-described third embodiment is configured linearly, and is a combination of the first unit “d” and the third unit “f”.

  A third unit that forms a sliding unit by engaging and sliding the sliding member 19 in a predetermined inner surface range (15-2) a, (16-2) a between the paired upper and lower flanges 15-2, 16-2. This is a combination of the first unit “d” and the third unit “f”.

  Other configurations are the same as those in the fourth and fifth embodiments, and thus are omitted.

  Although the six embodiments have been described above, as a common matter, the flange that becomes the joint portion between the first unit and the second unit is an integral structure from the beginning, and the number of flanges is the upper flange and the intermediate flange. A combination of three types of lower flanges may be used.

  In addition, the number of the bearing members 2 and 2-1 of the second unit “B” according to the present invention has been described as 8 and 12, respectively, but the number is not limited and the type, degree, and installation of the load are not limited. It can be selected according to factors such as conditions.

  Moreover, it is free to apply a lubricant to each of the first to third units.

Explanatory drawing which shows an example of a structure in Example 1, (a) Top view, (b) Side sectional view, (c) Partial notch perspective view of the principal part Explanatory drawing which shows an example of a structure in Example 2, (a) Top view, (b) Side cross section Sectional side view which shows an example of a structure in Example 3 Explanatory drawing which shows an example of a structure in Example 4, (a) Side sectional view, (b) Main part sectional perspective view Side sectional view showing an example of a configuration in Example 5 Side sectional view showing an example of a configuration in Example 6

Explanation of symbols

1, 13 Oval coil spring 2, 2-1, 14, 14-1 Bearing member 12, 19 Sliding member 3, 5, 3-1, 3-2 Upper flange 4, 6, 4-1, 4-2 Lower flange 7 Bolt 8 Nut 10 Spring 15, 17, 15-1, 15-2 Upper flange 16, 18, 16-1, 16-2 Lower flange

Claims (4)

  A first unit in which an oval coil spring is sandwiched between the upper and lower flanges and a second unit in which a bearing member is sandwiched between the upper and lower flanges are selectively set up and down to overlap. An anti-vibration structure using an oval coil spring, characterized by being combined.   The first unit has long grooves on opposing inner surfaces of the upper and lower flanges, and an oval coil spring is placed between the upper and lower flanges. Recesses are arranged at a predetermined pitch on the lower surface serving as the inner surface, and a long groove is provided on the upper surface serving as the inner surface of the opposed lower flange, and bearing members engaged with the recesses are respectively fitted between the upper and lower flanges so as to be able to rotate. 2. The vibration-proof structure using an oval coil spring according to claim 1, wherein the unit is formed.   The first unit in which the oval coil spring is sandwiched between the upper and lower flanges and the third unit in which the sliding member is sandwiched between the upper and lower flanges are selectively set in either the upper or lower direction. An anti-vibration structure using an oval coil spring, characterized by being combined.   The first unit has long grooves on the inner surfaces of the upper and lower flanges facing each other, and an oval coil spring is placed between the upper and lower flanges. 4. The vibration-proof structure using an oval coil spring according to claim 3, wherein a sliding unit is formed by engaging and sliding a sliding member within a predetermined range of the inner surface between the upper and lower flanges.

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