JP6963479B2 - Isolator - Google Patents

Description

The present invention relates to an isolator.

Conventionally, for example, when an outdoor unit (vibration source) having a compressor is installed on a foundation in an air conditioner, a base frame made of a rectangular frame arranged on the installation surface and the base frame are abbreviated as this base frame. An anti-vibration table is used, which is composed of the same rectangular frame, includes a frame on which the outdoor unit is placed and fixed on the upper surface, and is connected by interposing a plurality of isolators between the two. As shown in Patent Document 1, for example, the above isolator includes a coil spring that supports the load of the outdoor unit, and absorbs vibration and noise of the outdoor unit by elastic deformation of the coil spring, or transmits the vibration and noise of the outdoor unit. It is designed to be suppressed.

Further, the isolator of Patent Document 1 has a coil spring inside a cylindrical spring case (upper and lower case members) divided into upper and lower parts, and a loop of the coil spring in order to prevent natural vibration of the coil spring itself. A ring rubber (surging prevention member) made of an elastic body provided so as to come into contact with the spring from the inside is housed vertically. This prevents the position of the isolator from shifting or its posture from collapsing due to vibration caused by the operation of the compressor, and also absorbs vibration in the high frequency range.

Japanese Patent No. 4355539

By the way, in Patent Document 1, a fixing holder is arranged at the bottom of the lower spring case so as to extend on the diameter from one outer peripheral end to the other outer peripheral end, and this is the upper portion of the base frame. By straddling in the width direction, the isolator is held by the base frame. When assembling this isolator, the fixing holder is inserted from the side of the ring portion of the ring rubber, and the central portion of the fixing holder and the lower end portion of the ring rubber are engaged with each other. Then, this ring rubber is inserted into the coil spring from the lower side of the coil spring, and when the upper end portion of the ring rubber reaches the upper end portion of the coil spring, the upper end portion of the ring rubber is provided in the upper spring case. It is hooked by being sandwiched between the claws to connect the upper spring case and the lower spring case.

As described above, when the ring rubber is inserted into the coil spring, the ring rubber must be gradually inserted from under the coil spring, resulting in poor assembly workability.

Further, since the upper and lower spring cases are connected via the ring rubber by sandwiching the ring rubber between the claws of the upper spring case, the assembly workability is also poor in this respect.

The present invention has been made in view of these points, and an object of the present invention is to improve the assembling workability of an isolator in which a coil spring is housed between a pair of upper and lower case members.

In order to achieve the above object, in the first invention, a lower case member that opens upward and an upper case member that is arranged above the lower case member and opens downward. A coil spring housed between the two case members, a pair of upper and lower annular surging prevention members made of an elastic body, which are arranged so as to be in contact with the upper and lower ends of the coil spring, and an annular elasticity. A slip prevention member that is separate from the surging prevention member, which is made of a body, is provided, and an annular lower extending portion extending upward is formed at the bottom of the lower case member, and the upper case member. An annular upper extension portion extending downward is formed on the ceiling portion of the above, and the upper surging prevention member and the upper end portion of the coil spring are fitted to the upper extension portion to prevent lower surging. The member and the lower end of the coil spring are fitted to the lower extension , and recesses are formed in the circumferential direction on the bottom of the lower case member and the ceiling of the upper case member, respectively, and slip. The prevention member is characterized in that it is embedded in the recess of the lower case member and the recess of the upper case member, respectively.

According to the above configuration, the upper end portion of the upper surging prevention member and the coil spring is fitted to the upper extending portion of the upper case member, and the lower end portion of the lower surging prevention member and the coil spring is the lower case. Since the isolator is fitted to the lower extending portion of the member, the isolator can be assembled by a relatively simple operation of fitting, and the assembling workability of the isolator can be improved.

By the way, when the surging prevention member and the slip prevention member are integrated, it is conceivable to insert the slip prevention member into the through holes provided in the bottom portion of the lower case member and the ceiling portion of the upper case member. In that case, when fitting the surging prevention member to the extension portion, it is necessary to perform the fitting work while confirming the insertion position of the slip prevention member.

Here, according to the configuration of the first invention, slip prevention members made of elastic bodies and separate from the surging prevention member are embedded in the bottom of the lower case member and the ceiling of the upper case member, respectively. Therefore, when the surging prevention member is fitted to the extension portion, the fitting work can be performed independently without checking the embedded position of the slip prevention member, and the assembly work of the isolator is further improved. be able to.

In the second invention, in the first invention, the lower case member is an annular lower peripheral wall portion extending upward from the outer peripheral edge portion of the bottom portion in addition to the bottom portion and the lower extending portion. The lower extending portion is arranged radially inside the lower peripheral wall portion, and the upper case member is, in addition to the ceiling portion and the upper extending portion, the outer peripheral edge of the ceiling portion. It has an annular upper peripheral wall portion extending downward from the portion, the upper extending portion is arranged radially inside the upper peripheral wall portion, and the upper upper peripheral member and the upper end portion of the coil spring are formed. It is characterized in that the lower surging prevention member and the lower end portion of the coil spring are outer-fitted to the lower extension portion in this order, and the lower surging prevention member and the lower end portion of the coil spring are outer-fitted to the lower extension portion in this order.

According to the above configuration, the upper end portion of the upper surging prevention member and the coil spring is externally fitted to the upper extension portion of the upper case member in this order, and the lower end portion of the lower surging prevention member and the coil spring is formed. Since the isolator is externally fitted to the lower extending portion of the lower case member in this order, the isolator can be assembled by a relatively simple operation of outer fitting, and the assembling workability of the isolator can be improved.

In the third invention, in the second invention, a protrusion extending in the circumferential direction is formed on the outer peripheral surface of each of the extending portions, or at least one of the inner peripheral surface and the outer peripheral surface of each surging prevention member. It is characterized by being.

According to the above configuration, a protrusion extending in the circumferential direction is formed on the outer peripheral surface of each extension portion, or at least one of the inner peripheral surface and the outer peripheral surface of each surging prevention member. And when a load applied to the outside of the lower case member in the opposite direction is applied, the movement of the coil spring to the outside in the opposite direction of both case members can be restricted by the protrusion. Therefore, it is possible to prevent the coil spring from coming off from each case member and disassembling the isolator when the isolator is transported or before the isolator is assembled.

In the fourth invention, between the lower case member that opens upward, the upper case member that is arranged above the lower case member and opens downward, and both the case members. The housed coil spring and a pair of upper and lower annular surging prevention members made of an elastic body, which are arranged so as to be in contact with the upper and lower ends of the coil spring, are provided. An annular lower peripheral wall portion extending upward from the outer peripheral edge portion of the bottom portion and an annular lower peripheral extending portion arranged radially inside the lower peripheral wall portion and extending upward from the bottom portion. The upper case member is arranged radially inside the ceiling portion, the annular upper peripheral wall portion extending downward from the outer peripheral edge portion of the ceiling portion, and the upper peripheral wall portion, and downward from the bottom portion. It has an annular upper extending portion extending toward it, and the upper surging prevention member and the upper end portion of the coil spring are externally fitted to the upper extending portion in this order, and the lower surging prevention member and the coil are formed. The lower end portion of the spring is externally fitted to the lower extension portion in this order, and the outer peripheral surface of each of the extension portions or at least one of the inner peripheral surface and the outer peripheral surface of each of the surging prevention members is in the circumferential direction. It is characterized in that a protrusion extending to is formed.

According to the above configuration, the upper end portion of the upper surging prevention member and the coil spring is fitted to the upper extending portion of the upper case member, and the lower end portion of the lower surging prevention member and the coil spring is the lower case member. Since it is fitted to the lower extending portion, the isolator can be assembled by a relatively simple operation of fitting, and the assembling workability of the isolator can be improved.

According to the above configuration, the upper end portion of the upper surging prevention member and the coil spring is externally fitted to the upper extension portion of the upper case member in this order, and the lower end portion of the lower surging prevention member and the coil spring is formed. Since the isolator is externally fitted to the lower extending portion of the lower case member in this order, the isolator can be assembled by a relatively simple operation of outer fitting, and the assembling workability of the isolator can be improved.

According to the above configuration, a protrusion extending in the circumferential direction is formed on the outer peripheral surface of each extension portion, or at least one of the inner peripheral surface and the outer peripheral surface of each surging prevention member. And when a load applied to the outside of the lower case member in the opposite direction is applied, the movement of the coil spring to the outside in the opposite direction of both case members can be restricted by the protrusion. Therefore, it is possible to prevent the coil spring from coming off from each case member and disassembling the isolator when the isolator is transported or before the isolator is assembled.

In the fifth invention, Oite the fourth inventions, the ceiling of the bottom and the upper case member of the lower case member is made of an elastic body, the slip preventing member separately from the above surging prevention member Are each buried.

By the way, when the surging prevention member and the slip prevention member are integrated, it is conceivable to insert the slip prevention member into the through holes provided in the bottom portion of the lower case member and the ceiling portion of the upper case member. In that case, when fitting the surging prevention member to the extension portion, it is necessary to perform the fitting work while confirming the insertion position of the slip prevention member.

Here, according to the configuration of the fifth invention, slip prevention members made of elastic bodies and separate from the surging prevention member are embedded in the bottom of the lower case member and the ceiling of the upper case member, respectively. Therefore, when the surging prevention member is fitted to the extension portion, the fitting work can be performed independently without checking the embedded position of the slip prevention member, and the assembly work of the isolator is further improved. be able to.

In the sixth invention, in any one of the third to fifth inventions, the protrusion is arranged closer to the center of the coil spring in the vertical direction than the portion of the first winding from the end of the coil spring. It is characterized by being.

According to the above configuration, since the protrusion is arranged closer to the center of the coil spring in the vertical direction than the portion of the first winding from the end of the coil spring, at least when the coil spring is externally fitted to the surging prevention member. , The part of the first roll from the end of the coil spring gets over the part corresponding to the protrusion of the surging prevention member, and the feeling when it gets over is transmitted to the operator. Therefore, the operator can recognize that the coil spring is externally fitted to the surging prevention member by the feeling, and the assembly workability of the isolator can be further improved.

A seventh aspect of the invention is characterized in that, in any one of the third to sixth aspects, a plurality of the protrusions are intermittently arranged in the circumferential direction.

According to the above configuration, since a plurality of protrusions are intermittently arranged in the circumferential direction, when the surging prevention member is externally fitted to the extension portion, the protrusions are continuous over the entire circumference in the circumferential direction. It is possible to reduce the resistance received by the operator as compared with the case where it is provided in. Therefore, the surging prevention member can be easily externally fitted to the extension portion, and the assembly workability of the isolator can be further improved.

In the eighth invention, in any one of the third to seventh inventions, the protrusion is formed on the outer peripheral surface of each extending portion, and at least the inner peripheral surface and the outer peripheral surface of each surging prevention member are formed. On one side, protrusions extending in the axial direction are formed, and the protrusions of the respective extension portions and the protrusions of the respective surging prevention members corresponding to the respective extension portions are located at different positions in the circumferential direction. It is characterized by being arranged.

According to the above configuration, the protrusions are formed on the outer peripheral surface of each extension portion, and the protrusions extending in the axial direction are formed on at least one of the inner peripheral surface and the outer peripheral surface of each surging prevention member. Since the protrusion of the extension portion and the protrusion of each surging prevention member corresponding to each extension are arranged at different positions in the circumferential direction, the protrusion of the extension portion of the surging prevention member corresponds to the protrusion. In addition to the part to be used, the protrusion of the surging prevention member itself also comes into contact with the coil spring, and the contact area between the surging prevention member and the coil spring increases compared to the case where the surging prevention member itself has no protrusion, and the surging prevention function is provided. It can be fully exerted.

As described above, according to the present invention, the workability of assembling the isolator can be improved.

It is a front view of the vibration isolation table which attached the isolator which concerns on Embodiment 1 of this invention. It is a top view of the vibration isolation table which attached the isolator. It is a perspective view of an isolator. FIG. 3 is a cross-sectional view taken along the line IV-IV of FIG. It is a cross-sectional view taken along the line VV of FIG. It is an exploded perspective view of an isolator. FIG. 6 is a diagram corresponding to FIG. 6 showing the second embodiment. FIG. 4 is a diagram corresponding to FIG. 4 showing the third embodiment. FIG. 4 is a diagram corresponding to FIG. 4 showing the fourth embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following embodiments are merely exemplary and are not intended to limit the invention, its applications or its uses.

<Embodiment 1>
1 and 2 show a vibration isolator A according to an embodiment of the present invention, and the vibration isolator A is based on, for example, an outdoor unit (not shown) having a built-in compressor in an air conditioner as a vibration source. It is used when installing on the installation surface on the side. The anti-vibration table A is formed by combining approximately four long metal frames 10, 10, ... Into a rectangular frame, and is fixed on the installation surface by a foundation bolt or the like (not shown), and the base 1. A gantry 2 which is composed of a rectangular frame having substantially the same shape as the base 1 and is arranged on the base 1 at a predetermined interval and so as to overlap when viewed from above, and the gantry 2 are separated above the base 1. A plurality of (six in the illustrated example) isolators 5, 5, ... That are elastically supported, and a plurality of (four in the illustrated example) stopper mechanisms 3, 3, that regulate the movement of the gantry 2 upward above a predetermined value. The outdoor unit is mounted on the gantry 2 and is mounted and fixed. The stopper mechanisms 3, 3, ... Are arranged in each corner of the base 1 (frame 2).

Further, the isolators 5, 5, ... Are arranged at predetermined intervals from each other in the circumferential direction of the base 1 and the gantry 2, that is, in the longitudinal direction of the frames 10, 10, ... Of the base 1. As shown in detail in an enlarged manner in FIG. 4, each of the isolators 5 is placed on the frames 10, 10, ... Of the base 1 (for convenience, the upper surface of the frame 10 and the lower surface of the isolator 5 are separated from each other in the vertical direction. ), A substantially cup-shaped lower case member 6 that opens upward, and the lower case member 6 are arranged concentrically apart from each other above the lower case member 6, and open downward and open at the lower end thereof. The inner diameter of the lower portion including the portion is larger than the upper end opening of the lower case member 6, and the upper case member 7 has a substantially cup shape, and the two case members 6 and 7 are arranged concentrically. A surging prevention member 9, 9 composed of a coil spring 8 housed and receiving the load of the outdoor unit, and a pair of upper and lower rubber elastic bodies fitted into the loops 8a, 8a, ... Of the coil spring 8 so as to come into contact with each other from the inside. And have.

The lower case member 6 of the isolator 5 is a resin molded product in this embodiment. The lower case member 6 has a bottomed cylindrical shape having a bottom portion 61 and an annular lower peripheral wall portion 62 extending upward from the outer peripheral edge portion of the bottom portion 61, and a holding portion 12 below the bottom portion 61. Is formed integrally. The holding portion 12 is adapted to hold the upper portions of the frames 10, 10, ... Of the base 1 straddling the width direction (left-right direction in FIG. 4). A through hole 6a having a circular cross section is formed in a substantially central portion of the bottom portion 61 of the lower case member 6, and an annular portion 6b is arranged on the outer side in the radial direction thereof. On the outer side in the radial direction of the annular portion 6b, three arcuate recesses 6c and three through holes 6d are formed alternately in the circumferential direction. The recesses 6c are arranged at equal intervals in the circumferential direction, and through holes 6d are arranged between the recesses 6c and 6c adjacent to each other in the circumferential direction.

A substantially annular anti-slip member 11 made of a rubber elastic body is superposed on the bottom 61 of the lower case member 6 from below, and is fixed to the recess 6c in an internally fitted state. The lower portion of the anti-slip member 11 protrudes from the lower surface of the bottom portion 61 of the lower case member 6, and the upper surface of the base 1 is brought into contact with the lower surface of the lower anti-slip member 11, and the isolator 5 moves on the base 1. I hold it so that it does not.

An annular lower extending portion 65 extending upward from the annular portion 6b is integrally formed on the bottom portion 61 of the lower case member 6. That is, the lower extending portion 65 is arranged concentrically inside the lower peripheral wall portion 62 in the radial direction. On the outer peripheral surface of the lower extending portion 65, three protrusion-shaped protrusions 66, 66, 66 extending at equal intervals in the circumferential direction are arranged. That is, the protrusions 66 are arranged intermittently in the circumferential direction. The protrusion 66 is arranged above the loop 8a of the first winding from the lower end of the coil spring 8 (closer to the center in the vertical direction of the coil spring 8). The protrusion 66 is arranged at substantially the same position as the through hole 6d in the circumferential direction, and the radial and circumferential lengths of the protrusion 66 are smaller than the radial and circumferential lengths of the through hole 6d. There is. By making the size of the protrusion 66 smaller than the size of the through hole 6d in this way, the portion corresponding to the protrusion 66 of the mold for forming the lower case member 6 including the protrusion 66 is formed through the hole 6d. Can be pulled out from.

The upper case member 7 of the isolator 5 is also a resin molded product in this embodiment. The upper case member 7 has a height of about twice that of the lower peripheral wall portion 62 of the lower case member 6, and is an annular shape extending downward from the ceiling portion 71 and the outer peripheral edge portion of the ceiling portion 71. It is a covered cylinder having an upper peripheral wall portion 72. An annular tapered portion 7a formed of a tapered surface gradually expanding downward from the upper end portion is formed on the upper half of the upper peripheral wall portion 72, and an annular tapered portion 7a is formed on the lower substantially half from the lower end portion of the tapered portion 7a. An annular extension portion 7b extending straight downward is integrally formed. At the lower part of the outer peripheral surface of the extension portion 7b, a ridge-shaped protrusion 7c that is continuous over the entire circumference of the extension portion 7b in the circumferential direction is formed.

Further, as shown in FIG. 3, the ceiling portion 71 of the upper case member 7 is formed with a through hole 7d having a circular cross section at a substantially central portion surrounding the vertical axis, and an annular portion 7e is arranged on the outer side in the radial direction thereof. It is installed. On the outer side in the radial direction of the annular portion 7e, three arcuate recesses 7f and three through holes 7g are formed alternately in the circumferential direction. The recesses 7f are arranged at equal intervals in the circumferential direction, and through holes 7g are arranged between the recesses 7f and 7f adjacent to each other in the circumferential direction.

Then, as shown in FIG. 4, a substantially annular slip prevention member 11 made of a rubber elastic body is superposed on the ceiling portion 71 of the upper case member 7 from above, and is fixed to the recess 7f in an internally fitted state. Has been done. The upper part of the anti-slip member 11 protrudes from the upper surface of the ceiling portion 71 of the upper case member 7, and the lower surface of the gantry 2 is brought into contact with the upper surface of the upper anti-slip member 11 to apply the load of the outdoor unit to each isolator 5. It is supposed to receive.

The ceiling portion 71 of the upper case member 7 is integrally formed with an annular upper extending portion 75 extending downward from the outer peripheral edge portion of the annular portion 7e. That is, the upper extending portion 75 is arranged concentrically inside the upper peripheral wall portion 72 in the radial direction. On the outer peripheral surface of the upper extending portion 75, three protrusions 76, 76, 76 extending at equal intervals in the circumferential direction are arranged. That is, the protrusions 76 are arranged intermittently in the circumferential direction. The protrusion 76 is arranged below the loop 8a of the first winding from the upper end of the coil spring 8 (closer to the center in the vertical direction of the coil spring 8). The protrusion 76 is arranged at substantially the same position as the through hole 7g in the circumferential direction, and the radial and circumferential lengths of the protrusion 76 are smaller than the radial and circumferential lengths of the through hole 7g. There is. By making the size of the protrusion 76 smaller than the size of the through hole 7g in this way, the portion corresponding to the protrusion 76 of the mold for forming the upper case member 7 including the protrusion 76 is formed from the through hole 7g. Can be pulled out.

The surging prevention member 9 is for preventing resonance (surging) of the coil spring 8 itself. As shown in FIGS. 4 and 5, the lower surging prevention member 9 has an annular shape, the inner peripheral surface thereof abuts on the outer peripheral surface of the lower extending portion 65 of the lower case member 6, and the lower end surface thereof is in contact with the outer peripheral surface. , It is in contact with the upper surface of the bottom 61 of the lower case member 6. The lower surging prevention member 9 is arranged concentrically with the lower extension portion 65, and the vertical length of the lower surging prevention member 9 is the same as the vertical length of the lower extension portion 65.

As shown in FIG. 6, three protrusions 91 extending in the axial direction are formed on the outer peripheral surface of the lower surging prevention member 9 at equal intervals in the circumferential direction. As shown in FIG. 5, the protrusion 91 of the lower surging prevention member 9 and the protrusion 66 of the lower extension 65 are arranged at different positions in the circumferential direction. Specifically, the protrusion 91 of the lower surging prevention member 9 is between the protrusions 66, 66 of the lower extension 65 adjacent to each other in the circumferential direction, and among these protrusions 66, 66. It is located closer to one side. When the lower surging prevention member 9 is externally fitted to the lower extension portion 65, the portion of the lower surging prevention member 9 corresponding to the protrusion 66 of the lower extension portion 65 bulges. The bulging portion 93 allows the lower surging prevention member 9 to sufficiently contact the coil spring 8. In FIG. 4, the bulging portion 93 is not shown in order to make the figure easier to understand.

The upper surging prevention member 9 is also annular like the lower surging prevention member 9, and as shown in FIG. 4, the inner peripheral surface thereof abuts on the outer peripheral surface of the upper extending portion 75 of the upper case member 7. The upper end surface is in contact with the lower surface of the ceiling portion 71 of the upper case member 7. The upper surging prevention member 9 is arranged concentrically with the upper extending portion 75, and the vertical length of the upper surging prevention member 9 is the same as the vertical length of the upper extending portion 75.

Similar to the lower surging prevention member 9, three ridge-shaped protrusions 91 extending in the axial direction are formed on the outer peripheral surface of the upper surging prevention member 9 at equal intervals in the circumferential direction. The protrusion 91 of the upper surging prevention member 9 and the protrusion 76 of the upper extension 75 are arranged at different positions in the circumferential direction. Specifically, the protrusion 91 of the upper surging prevention member 9 is between the protrusions 76, 76 of the upper extension 75 adjacent to each other in the circumferential direction, and one side of these protrusions 76, 76. It is located close to. When the upper surging prevention member 9 is externally fitted to the upper extending portion 75, the portion of the upper surging prevention member 9 corresponding to the protrusion 76 of the upper extending portion 75 bulges. The bulging portion 93 allows the upper surging prevention member 9 to sufficiently contact the coil spring 8. In FIG. 4, the bulging portion 93 is not shown in order to make the figure easier to understand.

As shown in FIG. 4, the coil spring 8 is housed between the case members 6 and 7, and is arranged so that a pair of upper and lower surging prevention members 9 and 9 come into contact with each other in the loops 8a at both ends thereof from the inside. ing.

In the isolator 5 configured as described above, as shown in FIG. 6, the lower surging prevention member 9 and the lower end portion of the coil spring 8 are externally fitted to the lower extending portion 65 of the lower case member 6 in this order. At the same time, the upper end portion of the upper surging prevention member 9 and the coil spring 8 is externally fitted to the upper extension portion 75 of the upper case member in this order, and the bottom portion 61 of the lower case member 6 and the ceiling portion of the upper case member 7 are formed. It is assembled by embedding the anti-slip member 11 in each of the 71.

-Effect-
From the above, according to the present embodiment, the upper end portion of the upper surging prevention member 9 and the coil spring 8 is externally fitted to the upper extension portion 75 of the upper case member 7 in this order, and the lower surging prevention member 9 is formed. Since the lower end portion of the coil spring 8 is externally fitted to the lower extending portion 65 of the lower case member 6 in this order, the isolator 5 can be assembled by a relatively simple operation of external fitting. The assembly workability of the isolator 5 can be improved.

Further, since the protrusions 66 and 76 extending in the circumferential direction are formed on the outer peripheral surfaces of the extending portions 65 and 75, the load applied to the isolator 5 on the outer side of the case members 6 and 7 in the opposite direction is applied to the isolator 5. When acting, the movement of the coil springs 8 to the outside in the opposite direction of the case members 6 and 7 can be restricted by the protrusions 66 and 76. Therefore, it is possible to prevent the coil spring 8 from coming off from each of the case members 6 and 7 and disassembling the isolator 5 when the isolator 5 is transported or before the isolator 5 is assembled to the vibration isolation table A.

Further, since the protrusions 66 and 76 are arranged closer to the center of the coil spring in the vertical direction than the loop 8a of the first winding from the end of the coil spring 8, when the coil spring 8 is externally fitted to the surging prevention member 9. At least, the loop 8a of the first winding from the end of the coil spring 8 gets over the portions corresponding to the protrusions 66 and 76 of the surging prevention member 9, and the feeling when the loop 8a gets over is transmitted to the operator. Therefore, the operator can recognize that the coil spring 8 is externally fitted to the surging prevention member 9 by the feeling, and the assembly workability of the isolator 5 can be further improved.

Further, since three protrusions 66 and 76 are intermittently arranged in the circumferential direction, when the surging prevention member 9 is externally fitted to the extension portions 65 and 75, the protrusions 66 and 76 are all around in the circumferential direction. The resistance received by the operator can be reduced as compared with the case where the workers are continuously provided over the circumference. Therefore, the surging prevention member 9 can be easily externally fitted to the extending portions 65 and 75, and the assembling workability of the isolator 5 can be further improved.

Further, the protrusions 66 and 76 are formed on the outer peripheral surfaces of the extending portions 65 and 75, and the protruding portions 91, 91 and 91 extending in the axial direction are formed on the outer peripheral surface of each surging prevention member 9. The protrusions 66, 76 of the extension portions 65, 75 and the protrusions 91, 91, 91 of each surging prevention member 9 corresponding to the extension portions 65, 75 are arranged at different positions in the circumferential direction. Therefore, in addition to the portions of the extension portions 65 and 75 of the surging prevention member 9 corresponding to the protrusions 66 and 76, the protrusions 91, 91 and 91 of the surging prevention member 9 itself also come into contact with the coil spring 8 and surging. Compared with the case where the prevention member 9 itself does not have the protrusions 91, 91, 91, the contact area between the surging prevention member 9 and the coil spring 8 is increased, and the surging prevention function can be fully exerted.

By the way, when the surging prevention member 9 and the slip prevention member 11 are integrated, the slip prevention member is formed in the through holes 6d and 7g arranged in the bottom portion 61 of the lower case member 6 and the ceiling portion 71 of the upper case member 7. It is conceivable to insert the eleven, but in that case, when the surging prevention member 9 is externally fitted to the extension portions 65 and 75, it is necessary to perform the outer fitting work while checking the insertion position of the slip prevention member 11. There is.

Here, according to the configuration of the above embodiment, the bottom portion 61 of the lower case member 6 and the ceiling portion 71 of the upper case member 7 are made of an elastic body and are separate from the surging prevention member 9. When the surging prevention member 9 is externally fitted to the extension portions 65 and 75, the outer fitting work is independently performed without confirming the buried position of the slip prevention member 11. This makes it possible to further improve the assembly work of the isolator 5.

Further, since the surging prevention member 9 is not integrated but is separated into upper and lower parts, it is possible to make it difficult to transmit the vibration from the vibration source to the foundation side.

Further, since the upper case member 7 is provided with the protrusion 7c and one opposite side of the holding portion 12 of the lower case member 6 is formed in a bow shape, it rubs against the packing material or the like during transportation of the vibration isolation table A. It is possible to minimize scratches on the outer peripheral surfaces of the lower case member 6 and the upper case member 7.

<Embodiment 2>
FIG. 7 shows the second embodiment of the present invention. In this embodiment, the same parts as those in FIGS. 1 to 6 are designated by the same reference numerals, and detailed description thereof will be omitted.

In the first embodiment, the surging prevention member 9 and the slip prevention member 11 are separate bodies, whereas in the present embodiment, these members are integrally formed. Specifically, three arc-shaped anti-slip members 11 are formed on the lower end surface of the lower surging prevention member 9 at equal intervals in the circumferential direction. At the lower end of each anti-slip member 11, a protruding portion 11a protruding outward in the radial direction is formed. Similarly, the upper surging prevention member 9 is also formed with three anti-slip members 11 at the upper end thereof, and a protruding portion 11a is formed at the upper end of each anti-slip member 11.

In the bottom portion 61 of the lower case member 6 and the ceiling portion 71 of the upper case member 7, a through hole 7h into which the anti-slip member 11 is inserted (only the through hole 7h of the upper case member 7 is shown) is provided in each anti-slip member 11. It is formed so as to correspond to the through hole 7h, and a stopper portion 7i is arranged adjacent to the through hole 7h in the circumferential direction (only the stopper portion 7i of the upper case member 7 is shown).

When the upper anti-slip member 11 is inserted into the through hole 7h of the upper case member 7 and then the upper surging prevention member 9 is rotated in the circumferential direction, the stopper portion 7i and the protruding portion 11a are engaged with each other. This prevents the surging prevention member 9 and the slip prevention member 11 from coming off in the vertical direction. The lower slip prevention member 11 also has the same configuration to prevent the above-mentioned slippage.

Further, in the first embodiment, the protrusions 66 and 76 are formed on the extending portions 65 and 75 arranged on the lower and upper case members 6 and 7, whereas in the present embodiment, the protrusions 66 and 76 are formed. Parts 66 and 76 are not formed. Further, in the first embodiment, the protrusions 91 are formed on the outer peripheral surfaces of the pair of upper and lower surging prevention members 9, whereas in the present embodiment, the protrusions 91 are not formed.

Other configurations are the same as those in the first embodiment. As a result, as in the first embodiment, the pair of upper and lower surging prevention members 9 and the coil springs 8 are externally fitted to the extending portions 65 and 75 of both case members 6 and 7 in this order. The isolator 5 can be assembled with a relatively simple operation of a combination, and the assembling workability of the isolator 5 can be improved.

Further, by integrating the surging prevention member 9 and the slip prevention member 11, the number of component parts can be reduced.

<Embodiment 3>
FIG. 8 shows the third embodiment of the present invention. In this embodiment, the same parts as those in FIGS. 1 to 6 are designated by the same reference numerals, and detailed description thereof will be omitted.

In the first embodiment, the lower end portions of the lower surging prevention member 9 and the coil spring 8 are externally fitted to the lower extension portion 65 in this order, whereas in the present embodiment, the lower surging prevention portion is prevented. The lower end portions of the member 9 and the coil spring 8 are internally fitted to the lower peripheral wall portion 62 in this order. In the present embodiment, the lower peripheral wall portion 62 corresponds to the lower extending portion of the present invention.

Specifically, the lower extending portion 65 formed on the lower case member 6 in the first embodiment is not formed in the third embodiment. On the inner peripheral surface of the lower peripheral wall portion 62, three protrusions 66, 66, 66 having a protruding shape extending at equal intervals in the circumferential direction are arranged. That is, the protrusions 66 are arranged intermittently in the circumferential direction. The protrusion 66 is arranged above the loop 8a of the first winding from the lower end of the coil spring 8 (closer to the center in the vertical direction of the coil spring 8). The protrusion 66 is arranged at substantially the same position as the through hole 6d in the circumferential direction, and the radial and circumferential lengths of the protrusion 66 are smaller than the radial and circumferential lengths of the through hole 6d. There is. By making the size of the protrusion 66 smaller than the size of the through hole 6d in this way, the portion corresponding to the protrusion 66 of the mold for forming the lower case member 6 including the protrusion 66 is formed through the hole 6d. Can be pulled out from.

The inner peripheral surface of the surging prevention member 9 is in contact with the outer peripheral surface of the coil spring 8. On the inner peripheral surface, three protrusions 91 having a ridge shape extending in the axial direction are formed at equal intervals in the circumferential direction. The protrusion 91 of the lower surging prevention member 9 and the protrusion 66 of the lower peripheral wall portion 62 are arranged at different positions in the circumferential direction. Specifically, the protrusion 91 of the lower surging prevention member 9 is between the protrusions 66, 66 of the lower peripheral wall portion 62 adjacent to each other in the circumferential direction, and one of these protrusions 66, 66. It is placed closer to the side. When the lower surging prevention member 9 is internally fitted to the lower peripheral wall portion 62, the portion of the lower surging prevention member 9 corresponding to the protrusion 66 of the lower peripheral wall portion 62 bulges. The bulging portion 93 allows the lower surging prevention member 9 to sufficiently contact the coil spring 8. In FIG. 8, the bulging portion 93 is not shown in order to make the figure easier to understand.

As shown in FIG. 8, the coil spring 8 is housed between the case members 6 and 7, and the surging prevention member 9 from the outside to the lower side is housed in the loop 8a at the lower end thereof in the loop 8a at the upper end thereof. The surging prevention member 9 on the upper side is arranged so as to come into contact with the inner side.

In the isolator 5 configured as described above, the lower surging prevention member 9 and the lower end portion of the coil spring 8 are internally fitted to the lower peripheral wall portion 62 of the lower case member 6 in this order, and the upper side of the upper case member 7 is fitted. The upper surging prevention member 9 and the upper end of the coil spring 8 are externally fitted to the extending portion 75 in this order, and the slip prevention member 11 is attached to the bottom portion 61 of the lower case member 6 and the ceiling portion 71 of the upper case member 7. Each is assembled by burying it.

Other configurations are the same as those in the first embodiment. As a result, as in the first embodiment, the pair of upper and lower surging prevention members 9 and the coil spring 8 are internally fitted into the lower peripheral wall portion 62 of the lower case member 6 in this order, and the upper case member 7 extends upward. By externally fitting to the portion 75, the isolator 5 can be assembled by a relatively simple operation of fitting, and the assembling workability of the isolator 5 can be improved.

<Embodiment 4>
FIG. 9 shows the fourth embodiment of the present invention. In this embodiment, the same parts as those in FIGS. 1 to 6 are designated by the same reference numerals, and detailed description thereof will be omitted.

In the third embodiment, the upper end portions of the upper surging prevention member 9 and the coil spring 8 are externally fitted to the upper extension portion 75 in this order, whereas in the present embodiment, the upper surging prevention member 9 and the upper end portion are fitted to each other. The upper end portion of the coil spring 8 is internally fitted to the upper peripheral wall portion 72 in this order. In the present embodiment, the upper peripheral wall portion 72 corresponds to the lower extending portion of the present invention.

Specifically, the upper extending portion 75 formed on the upper case member 7 in the third embodiment is not formed in the fourth embodiment. On the inner peripheral surface of the upper peripheral wall portion 72, three protrusions 76, 76, 76 having a protruding shape extending at equal intervals in the circumferential direction are arranged. That is, the protrusions 76 are arranged intermittently in the circumferential direction. The protrusion 76 is arranged below the loop 8a of the first winding from the upper end of the coil spring 8 (closer to the center in the vertical direction of the coil spring 8). The protrusion 76 is arranged at substantially the same position as the through hole 7g in the circumferential direction, and the radial and circumferential lengths of the protrusion 76 are smaller than the radial and circumferential lengths of the through hole 7g. There is. By making the size of the protrusion 76 smaller than the size of the through hole 7g in this way, the portion corresponding to the protrusion 76 of the mold for forming the upper case member 7 including the protrusion 76 is formed from the through hole 7g. Can be pulled out.

Further, in the third embodiment, the upper peripheral wall portion 72 of the upper case member 7 is formed by integrally forming the tapered portion 7a and the extension portion 7b, but in the present embodiment, the annular one extending straight downward. Is.

Further, the inner peripheral surface of the surging prevention member 9 is in contact with the outer peripheral surface of the coil spring 8. On the inner peripheral surface, three protrusions 91 having a ridge shape extending in the axial direction are formed at equal intervals in the circumferential direction. The protrusion 91 of the upper surging prevention member 9 and the protrusion 76 of the upper peripheral wall portion 72 are arranged at different positions in the circumferential direction. Specifically, the protrusion 91 of the upper surging prevention member 9 is between the protrusions 76 and 76 of the upper peripheral wall 72 adjacent to each other in the circumferential direction, and is on one side of these protrusions 76 and 76. It is placed close to each other. When the upper surging prevention member 9 is internally fitted to the upper peripheral wall portion 72, the portion of the upper peripheral wall portion 72 corresponding to the protrusion 76 of the upper surging prevention member 9 bulges. The bulging portion 93 allows the upper surging prevention member 9 to sufficiently contact the coil spring 8. In FIG. 9, the bulging portion 93 is not shown in order to make the figure easier to understand.

As shown in FIG. 9, the coil spring 8 is housed between the case members 6 and 7, and is arranged so that a pair of upper and lower surging prevention members 9 and 9 come into contact with the loops 8a at both ends thereof from the outside. There is.

In the isolator 5 configured as described above, the lower peripheral wall portion 62 of the lower case member 6 is internally fitted with the lower surging prevention member 9 and the lower end portion of the coil spring 8 in this order, and the upper peripheral wall of the upper case member is fitted. The upper surging prevention member 9 and the upper end of the coil spring 8 are internally fitted to the portion 72 in this order, and the anti-slip member 11 is embedded in the bottom portion 61 of the lower case member 6 and the ceiling portion 71 of the upper case member 7, respectively. It is assembled by doing.

Other configurations are the same as those in the third embodiment. As a result, as in the third embodiment, the pair of upper and lower surging prevention members 9 and the coil springs 8 are internally fitted to the peripheral wall portions 62 and 72 of both case members 6 and 7 in this order, which is called internal fitting. The isolator 5 can be assembled with a relatively simple operation, and the assembling workability of the isolator 5 can be improved.

<Other Embodiments>
In each of the above embodiments, a plurality of protrusions 66, 76 are intermittently arranged on the extending portions 65, 75 in the circumferential direction, but they may be continuously formed over the entire circumference in the circumferential direction. ..

Further, in each of the above embodiments, the protrusions 66 and 76 are formed on the extending portions 65 and 75 or the peripheral wall portions 62 and 72, but the protrusions 66 and 76 may be formed on at least one of the inner peripheral surface and the outer peripheral surface of the surging prevention member 9. good. With this configuration as well, it is possible to prevent the coil spring 8 from coming off from the case members 6 and 7.

Further, in each of the above embodiments, the protrusion 91 is arranged closer to one side of the protrusions 66, 66; 76, 76, but as long as it is located between the protrusions 66, 66; 76, 76, it is arranged anywhere. It may be arranged in the middle part of the protrusions 66, 66; 76, 76, for example.

Further, in each of the above embodiments, the protrusion 91 is formed on the outer peripheral surface or the inner peripheral surface of the surging prevention member 9, but may be formed on both surfaces thereof. Even with this configuration, the surging prevention function can be fully exerted.

Further, in each of the above embodiments, the ridge-shaped protrusion 91 is formed on the surging prevention member 9, but as long as it is located between the protrusions 66, 66; 76, 76 adjacent to each other in the circumferential direction, the protrusion 91 The circumferential length may be larger than that of the first embodiment.

Further, in the third embodiment, the lower end portion of the lower surging prevention member 9 and the coil spring 8 is internally fitted to the lower peripheral wall portion 62 in this order, and the upper end portion of the upper surging prevention member 9 and the coil spring 8 is fitted. The lower surging prevention member 9 and the lower end of the coil spring 8 were outer-fitted to the upper extension portion 75 in this order, but the lower end portions of the lower surging prevention member 9 and the coil spring 8 were outer-fitted to the lower extension portion 65 in this order, and the upper surging prevention member 9 and the coil were externally fitted. The upper end portion of the spring 8 may be internally fitted to the upper peripheral wall portion 72 in this order.

5 Isolator 6 Lower case member 61 Bottom 62 Lower peripheral wall (lower extension)
65 Lower extension 66 Projection 7 Upper case member 71 Ceiling 72 Upper peripheral wall (upper extension)
75 Upper extension 76 Projection 8 Coil spring 9 Surging prevention member 91 Projection 11 Anti-slip member

Claims (8)

The lower case member that opens upward,
The upper case member, which is arranged above the lower case member and opens downward,
A coil spring housed between the two case members and
A pair of upper and lower annular surging prevention members made of elastic bodies, which are arranged so as to be in contact with the upper and lower ends of the coil spring ,
A slip prevention member that is separate from the surging prevention member and is made of an annular elastic body is provided.
At the bottom of the lower case member, an annular lower extending portion extending upward is formed.
An annular upper extending portion extending downward is formed on the ceiling portion of the upper case member.
The upper surging prevention member and the upper end portion of the coil spring are fitted to the upper extending portion.
The lower surging prevention member and the lower end of the coil spring are fitted to the lower extension .
Recesses are formed in the circumferential direction at the bottom of the lower case member and the ceiling of the upper case member, respectively.
The isolator is characterized in that the anti-slip member is embedded in a recess of the lower case member and a recess of the upper case member, respectively. In claim 1,
The lower case member has, in addition to the bottom portion and the lower extending portion, an annular lower peripheral wall portion extending upward from the outer peripheral edge portion of the bottom portion.
The lower extending portion is arranged inside the lower peripheral wall portion in the radial direction.
The upper case member has, in addition to the ceiling portion and the upper extending portion, an annular upper peripheral wall portion extending downward from the outer peripheral edge portion of the ceiling portion.
The upper extending portion is arranged inside the upper peripheral wall portion in the radial direction.
The upper surging prevention member and the upper end portion of the coil spring are externally fitted to the upper extending portion in this order.
An isolator characterized in that the lower surging prevention member and the lower end portion of the coil spring are externally fitted to the lower extending portion in this order. In claim 2,
An isolator characterized in that a protrusion extending in the circumferential direction is formed on the outer peripheral surface of each of the extending portions, or at least one of the inner peripheral surface and the outer peripheral surface of each surging prevention member. The lower case member that opens upward,
The upper case member, which is arranged above the lower case member and opens downward,
A coil spring housed between the two case members and
A pair of upper and lower annular surging prevention members made of an elastic body are provided so as to be in contact with the upper and lower ends of the coil spring.
The lower case member is arranged radially inside the bottom portion, the annular lower peripheral wall portion extending upward from the outer peripheral edge portion of the bottom portion, and the lower peripheral wall portion, and upward from the bottom portion. Has an extending annular lower extension and
The upper case member is arranged radially inside the ceiling portion, the annular upper peripheral wall portion extending downward from the outer peripheral edge portion of the ceiling portion, and the upper peripheral wall portion, and extends downward from the bottom portion. It has an annular upper extension and
The upper surging prevention member and the upper end portion of the coil spring are externally fitted to the upper extending portion in this order.
The lower surging prevention member and the lower end of the coil spring are externally fitted to the lower extension in this order.
An isolator characterized in that a protrusion extending in the circumferential direction is formed on the outer peripheral surface of each of the extending portions, or at least one of the inner peripheral surface and the outer peripheral surface of each surging prevention member. In claim 4 ,
An isolator characterized in that a slip prevention member, which is made of an elastic body and is separate from the surging prevention member, is embedded in the bottom portion of the lower case member and the ceiling portion of the upper case member. In any one of claims 3 to 5,
The isolator is characterized in that the protrusion is arranged closer to the center in the vertical direction of the coil spring than the portion of the first roll from the end of the coil spring. In any one of claims 3 to 6,
The isolator is characterized in that a plurality of the protrusions are intermittently arranged in the circumferential direction. In any one of claims 3 to 7,
The protrusions are formed on the outer peripheral surface of each extension.
Protrusions extending in the axial direction are formed on at least one of the inner peripheral surface and the outer peripheral surface of each of the surging prevention members.
An isolator characterized in that the protrusions of the extension portions and the protrusions of the surging prevention members corresponding to the extension portions are arranged at different positions in the circumferential direction.

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