JP3569016B2 - Anti-vibration device - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to an improvement in an anti-vibration device that is directly interposed between an upper gantry for mounting a load and a lower gantry for installation on a base, or a base and a load.
[0002]
[Prior art]
A load device (F) which is interposed between an upper mount (A) for loading and a lower mount (B) for installation on a base, and which supports a load device (F) mounted on the upper mount (A), is provided. As a conventional anti-vibration device (C) for absorbing vibration generated from a load device (F) during operation of (F), for example, as shown in FIGS. A telescopic cylinder (D) composed of (d1) and a bottomed cylindrical body (d2) and a compression spring (E) housed in the telescopic cylinder (D) are mainly known. ing.
[0003]
In the above-mentioned telescopic cylinder (D), an inner flange (u) is protruded from the inner periphery of the lower end of the upper bottomed cylinder (d1), and the outer periphery of the upper end of the lower bottomed cylinder (d2). Is provided with an outer flange (v). The compression spring (E) is housed in the telescopic cylinder (D) by applying a preload, and the outer flange (v) and the inner flange (u) engage with each other by the elastic force. As a result, the vibration isolator (C) is integrated, does not come apart, and is easy to handle.
[0004]
However, in such an engagement structure of the outer flange (v) and the inner flange (u), the upper bottomed cylinder (d1) is moved to the lower bottomed cylinder by the movement of the center of gravity of the load device (F) during operation. When it is inclined or displaced with respect to (d2), one of the inner and outer collars (u) and (v) comes into contact with the lower and upper bottomed cylinders (d2) and (d1), and the spring constant sharply increases. And the vibration is transmitted from the contact portion at the same time as the spring property is deteriorated, and there is an insufficient point from the viewpoint of the spring characteristics and vibration prevention.
In addition, it is necessary to compress the compression spring (E) to engage the outer flange (v) and the inner flange (u) for assembly. There was a problem that it took time.
[0005]
[Problems to be solved by the invention]
Therefore, a problem to be solved by the present invention is that the compression spring is integrally fixed to the end member or the closed end of the bottomed telescopic cylinder, so that the transportability, the mounting property and the assembling property are good, and the spring is It is another object of the present invention to provide a vibration damping device with sufficient measures against noise and vibration without deteriorating characteristics.
[0006]
[Means for Solving the Problems]
Thus, according to the vibration isolator (1a) of the first embodiment according to “Claim 1,” “the upper base (A) and the lower base (B) or the base (b) and the load (F) A vibration isolator composed of a compression spring (3) interposed to support the load (F) and absorb vibration, and end members (6) (7) disposed at both ends of the compression spring (3) In the device (1a), the compression spring (3) has an end (31) bent inside the spring body (3a), and protrudes from the end members (6) and (7). The bent end (31) of the compression spring (3) is inserted into and engaged with the insertion hole (5a) of the connecting means (5), and is provided on the end members (6) and (7) . The end (31) of the compression spring (3 ) is embedded in the mold member (8) . "
[0007]
According to this, the bent end portion (31) of the compression spring (3) is inserted into and engaged with the insertion hole (5a) of the connecting means (5) projecting from the end member (6) (7). Since the compression spring (3) and the end members (6) and (7) at both ends are integrated, handling is simple. In addition, assembling these components is very simple because the bent ends (31) are merely inserted into the insertion holes (5a) and engaged, and there is no need to compress the compression springs (3).
Further , since the vibration isolator (1a) of the first embodiment has only the end members (6) and (7) attached to both ends of the compression spring (3), the upper mount (A) and the lower mount (B) or the base (b) and the load (F), there is no flange that degrades the spring characteristics as in the past, so that the compression spring (3) has The anti-vibration action is performed according to the characteristics.
Furthermore, it has bent end of the compression spring (3) (31) is formed by mere bending, bent end with respect to the central axis of the compression spring (3) (31) have a right angle Even when there is no end , all or part of the end (31) of the compression spring (3) is floated and embedded in the mold member (8) provided on the end member (6) , so that compression is possible. The spring (3) can be attached vertically to the end member (6) .
[0008]
Here, the connecting means (5) protruding from the end members (6) and (7) is not limited to these, of course, but the bolt body (51) shown in FIG. It is composed of a molded part (54) and the like.
When the bolt body (51) is used, bolt insertion holes (23a) and (23b) are formed in the center of the end members (6) and (7).
In addition, it is preferable that a sound insulating pad (4) is attached to the outside of the end members (6) and (7). In this case, the bases (A) and (B) or the base of the sound insulating pad (4) are provided. It is more preferable that the side that contacts the load (B) or the load (F) is formed in a wavy shape.
When the sound insulation pad (4) is attached, the pad (4) is also provided with a bolt insertion hole (4a).
[0009]
Each bent end (31) of the compression spring (3) is bent inside the spring body (3a). In this case, the compression spring can be bent in the direction toward the central axis of the spring body (3a) and parallel to the end members (6) and (7) (at right angles to the central axis of the compression spring (3)). This is preferable for mounting (3) vertically on the end members (6) and (7) .
[0010]
When the connecting means (5) is composed of a bolt body (52) and a nut (53), the bolt body (52) is of a so-called bolt-like shape composed of a head and legs with engraved male threads. Alternatively, it may be a simple rod-like shape without a head and having a shape in which a male screw is engraved on the outer periphery. A spring engaging insertion hole (5a) through which each bent end (31) of the compression spring (3) is inserted is inserted into an end of the bolt body (52) inserted into the bottomed telescopic cylinder (2). Drilled.
[0011]
The vibration isolator (1b) according to claim 2 is a vibration isolator (1b) interposed between the upper frame (A) and the lower frame (B) or between the base (b) and the load (F). And a bottomed telescopic cylinder (2) that expands and contracts in the axial direction and has an axial end closed, and supports the load (F) applied to the cylinder (2) that is provided inside the cylinder (2). Compression spring (3) that absorbs vibrations, and connecting means (5) for connecting the compression spring (3) and the bottomed telescopic cylinder (2), and the compression spring (3) is The end (31) is bent inside the spring body (3a), and the connecting means (5) projecting from the closed ends (22a) (22b) of the bottomed telescopic cylinder (2) is inserted. The bent end portion (31) of the compression spring (3) is inserted into and engaged with the hole (5a), and is provided on the closed end surfaces (22a) and (22b) of the bottomed telescopic cylinder (2) . The end (31) of the compression spring (3 ) is embedded in the mold member (8) . "
[0012]
In this case, unlike the first embodiment (1a), the compression spring (3) expands and contracts in the axial direction and is housed in the bottomed telescopic cylinder (2) whose axial end is closed. Also in this case, the closed ends (22a) and (22b) of the bottomed telescopic cylinder (2) are connected to the compression spring (3) through the insertion hole (5a) of the connecting means (5).
As a result, the compression spring (3) and the bottomed telescoping cylinder (2) are integrated, and not only is it easy to handle, but also the outer flange (v) and inner Since there is no such thing as (u), these do not come into contact with the bottomed telescopic cylinder (2), and the spring characteristic of the compression spring (3) is the same as in the first embodiment (1a). The anti-vibration action is performed in accordance with
The bottomed telescoping cylinder (2) is preferably composed of an upper bottomed cylinder (2a) and a lower bottomed cylinder (2b) that are loosely fitted to each other. Outside the closed end faces (22a) (22b) of the bottomed telescopic cylinder (2), it is preferable to attach a sound insulation pad (4) made of, for example, synthetic rubber, as described above. In addition, the connecting means (5), the sound insulating pad (4), the shape and the bending direction of the compression spring (3) and the bent end (31), and the center of the closed end faces (22a) (22b) are drilled. The bolt insertion holes (23a) (23b) are the same as in the first embodiment (1a).
Incidentally, the same manner as described above, and bent end of the compression spring (3) (31) is formed by mere bending, bent end with respect to the central axis of the compression spring (3) (31) is a right angle Even if it is not , all of the end (31) of the compression spring (3) is in the mold member (8) provided on the closed end surface (22a) (22b) of the bottomed telescopic cylinder (2). Alternatively, the compression spring (3) can be vertically attached to the closed end faces (22a) (22b) of the bottomed telescopic cylinder (2) by floating and embedding a part thereof.
[0013]
The third embodiment defines the first and second embodiments (1a) and (1b) in more detail. "The insertion hole for spring locking is provided at the tip of each bent end (31) of the compression spring (3). (5a) is provided with a stopper means (32) for preventing the detachment from coming off.
As the stopper means (32), a resin cap which can be removably inserted into the bent end portion (31), an insertion hole (5a) formed in each bent end portion (31), and this insertion hole (5a) may be a combination with a pin that is removably inserted. Here, the cap (32) is shown as a representative example.
[0015]
[Action]
According to the vibration isolator (1a) (1b) according to claims 1 and 2, the compression spring (3) housed in the end member (6) (7) or the bottomed telescopic cylinder (2) is: Each end (31) is bent inside the spring body (3a), and this bent end (31) is inserted through the spring locking insertion hole (5a) of the connecting means (5). Therefore, the bottomed telescoping cylinder (2) and the compression spring (3) are integrally combined by the connecting means (5), so that they do not break during transportation.
Further, when the vibration isolator (1a) (1b) thus configured is interposed between the upper gantry (A) and the lower gantry (B), or between the base (B) and the load (F). In addition, the connecting means (5) can also function as a means for attaching to each of the frames (A) and (B), the base (b), and the load (F).
In addition , even if the compression spring (3) expands and contracts when the vibration isolator (1a) (1b) receives a load (F) from a device attached to the upper gantry (A) or the end member (6), etc. In the case of the embodiment (1a), there is no bottomed telescopic cylinder (2) itself, and in the case of the second embodiment (1b), the bottomed telescopic cylinder (2) has an engaging portion such as a flange structure. Since there is no such contact, the flange does not come into contact as in the related art, and the vibration can be controlled smoothly.
Furthermore, it has bent end of the compression spring (3) (31) is formed by mere bending, bent end with respect to the central axis of the compression spring (3) (31) have a right angle Even when there is no compression spring (3) , the compression spring (3) can be attached vertically to the end member (6) or the closed end faces (22a) (22b) of the bottomed telescopic cylinder (2) .
[0016]
According to the vibration isolator (1a) (1b) according to the third aspect, since the stopper (32) is detachably attached to each bent end (31) of the compression spring (3), an integral engagement is provided. The engagement can be ensured, and this engagement can be released if necessary.
[0018]
【Example】
Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments, but the present invention is not limited thereto. FIG. 1 is a cross-sectional view when a first embodiment (1a) of a vibration isolator (1) of the present invention is interposed between a window frame serving as a base (b) and a ventilation fan serving as a load (F), FIG. 2 is a longitudinal sectional view when the vibration isolator (1a) is rotated by 90 °, and FIG. 4 is a sectional view of another embodiment of the vibration isolator (1a).
[0019]
As shown in FIG. 2, the first embodiment (1a) of the vibration isolator (1) includes a compression spring (3) and end members (6) disposed at both ends of the compression spring (3). The connection means (5) is composed of a bolt body (52) and a nut (53), and a press forming part in which the connection means (5) is formed by press working as shown in FIG. (54).
In any case, the end (31) of the compression spring (3) is bent inside the spring body (3a). In this case, the compression spring can be bent in the direction toward the central axis of the spring body (3a) and parallel to the end members (6) and (7) (at right angles to the central axis of the compression spring (3)). (3) is preferable for vertically mounting the end members (6) and (7), but is not bent at a right angle to the center axis of the compression spring (3) because bending accuracy is not high. It will be a little off. Therefore, in general, the end of the compression spring is polished so that the end is perpendicular to the center axis of the compression spring. However, in the present invention, the polishing is performed simply by bending. I can't. Therefore, as described above, the bending direction of the bent end portion (31) with respect to the center axis of the compression spring (3) is slightly deviated from a right angle. In this case, when the compression spring (3) is attached to the end members (6) and (7), the entire end of the compression spring (3) does not come into contact with the end members (6) and (7). It is mounted vertically by the means described below.
[0020]
When the connecting means (5) protruding from the end members (6) and (7) is a press-formed part (54) formed by press working, the center of the end members (6) and (7) is Pressing is performed to partially extrude, thereby forming projections as shown in FIG. 4 , that is, press-formed portions (54). An insertion hole (5a) is formed in the press-formed portion (54). The case where the connecting means (5) is composed of the bolt body (52) and the nut (53) is as described above, and the bolt body (52) has a bolt-like shape with an external thread engraved on the outer surface, or A spring-shaped insertion hole (5a), which is a mere rod, into which the bent end (31) of the compression spring (3) is inserted, is bored at the end.
[0021]
The bolt insertion holes (23a) and (23b) are formed in the center of the end members (6) and (7) as described above, and the bent ends (31) of the compression springs (3) are fitted. The elongated hole (9) to be inserted may be formed in accordance with the bolt insertion holes (23a) (23b). Of course, the width of the long hole (9) is narrower than the bolt insertion holes (23a) (23b), so that the bolt insertion holes (23a) (23b) protrude from both sides of the long hole (9).
[0022]
A sound insulating pad (4) is mounted on the outside of the end members (6) and (7), and the frame (A) (B) or the base (b) of the sound insulating pad (4) and the load (F) are provided. The contact side is formed in a wavy shape.
A resin cap serving as a stopper means (32) for preventing the compression spring (3) from coming off from the insertion hole (5a) for locking the spring is attached to the tip of each bent end (31). As a result, the bent end (31) does not fall out of the insertion hole (5a).
[0023]
The compression spring (3) is attached to the end member (6) in this manner. However, as described above, the bending end (31) of the compression spring (3) has low bending accuracy, and generally the end member (6). (6) cannot be set up vertically and it is wobbly, but if the bent end (31) is out of the way, the bent end (31) fits into the elongated hole (9). Then, it is erected vertically and embedded in the mold member (8). Conversely, when the bent end portion (31) is depressed inward, the bent end portion (31) may be erected vertically and embedded in the mold member (8) as it is. At this time, the whole or a part of the end portion (31) of the compression spring (3) may be lifted upright to be erected and embedded in that state. Thus, the end members (6) and (7) can be vertically fixed to the end of the compression spring (3).
[0024]
Example 2
FIG. 5 is a cross-sectional view of a second embodiment (1b) of the vibration isolator (1) of the present invention when it is interposed between an upper gantry (A) and a lower gantry (B), and FIG . FIG . 7 is a longitudinal sectional view of the device (1b) when no load is applied, and FIG. 7 is a sectional view when a load is applied to the vibration isolator (1b).
The second embodiment (1b) is different from the first embodiment (1a) in that a bottomed telescopic cylinder (2) is provided instead of the end members (6) and (7). All are the same. The bottomed telescopic cylinder (2) is composed of an upper bottomed cylinder (2a) and a lower bottomed cylinder (2b) that are loosely fitted to each other. In this example, the upper bottomed cylindrical body (2a) is set to have a larger opening diameter, and the periphery thereof is not provided with a flange unlike the conventional example. The upper and lower bottomed cylinders (2a) and (2b) have substantially the same configuration except that the diameters are different. That is, the cylindrical main bodies (21a) and (21b) that are loosely fitted are resin-molded integrally with the closed ends (22a) and (22b) serving as the closed ends attached to the upper and lower frames (A) and (B). A sound insulation pad (4) is attached to the back surface of each closed end (22a) (22b).
[0025]
Above vibration damping device constructed as (1a) (1b), if a free state in a state in which the compression spring (3) is extended as shown in FIG. 2, 6. In the case of FIG. 2, since the end members (6) and (7) are connected to the upper and lower bent ends (31) of the compression spring (3) by the connecting member (5), they are not separated. They can be transported together.
Similarly, in the case of FIG. 6 , a flange portion that engages with each other as in the related art is formed at an opening edge where the upper bottomed cylindrical body (2a) and the lower bottomed cylindrical body (2b) are loosely fitted to each other. However, since the upper and lower bottomed cylinders (2a) and (2b) are connected to the upper and lower ends (31) of the compression spring (3) by the connecting member (5), they must be similarly disassembled. And can be transported together.
[0026]
Also, as shown in FIGS. 1 and 5, the connecting member is provided between the upper gantry (A) and the lower gantry (B) or directly between the base (b) and the load (F). In the case where the bolt body (51) is used as (5), this functions as an attachment means to the upper and lower mounts (A) and (B), the base (b) and the load (F).
[0027]
The vibration isolator (1a) (1b) mounted in this way is compressed according to the load of the upper gantry (A) or the load (F) on which the device is mounted, and the vibration or load from the load (F) is reduced. Although the vibration to (F) is absorbed, the vibration damping device (1a) of the first embodiment is only the compression spring (3), and the second embodiment (1b) has the upper bottomed cylindrical body (2a). The lower bottomed cylindrical body (2b) is merely loosely fitted, and there is no structure part in contact with each other, so that vibration is not transmitted from the contact part or the spring characteristics are degraded, and effective vibration control is achieved. Will be achieved.
[0028]
【The invention's effect】
According to the anti-vibration device of the present invention, the members constituting the anti-vibration device can be handled as an integral object, so that storage, packing, or transport is very convenient.
In addition, since the connecting means can be used also as an attaching means, it can be easily attached to the gantry, and it is not necessary to bend the compression spring at the time of assembling, so that the assembling is simple.
Also , since the elastic bottomed cylindrical body does not have a structure in which it comes into contact with each other when it expands and contracts, there is no case where vibration is transmitted from the contact portion and there is no case where the spring characteristics are deteriorated.
Furthermore, since all or a part of the end of the compression spring is floated and embedded in the end member or the mold member provided on the closed end surface of the bottomed telescopic cylinder, the compression spring is bent. Even when the end is not perpendicular to the center axis of the compression spring, the compression spring can be mounted perpendicular to the end member or the closed end surface of the bottomed telescopic cylinder.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view when a first embodiment of a vibration isolator according to the present invention is interposed between a base and a load. FIG. FIG. 3 is a partially cutaway perspective view of the vibration isolator of the first embodiment of the present invention in a no-load state. FIG. 4 is a perspective view of another example of the vibration isolator of the first embodiment of the present invention. FIG. 5 is a perspective view when a second embodiment of the vibration isolator of the present invention is interposed between the upper and lower mounts. FIG. 6 is not preloaded on the vibration isolator of FIG. FIG. 7 is a cross-sectional view when the vibration isolator of FIG. 5 is interposed between the upper and lower pedestals. FIG. 8 is a plane cross-sectional view of FIG. 5. FIG. 9 is used as a connecting member in the present invention. Perspective view of a bolt body. FIG. 10 is a vertical cross-sectional view when using a conventional example of a vibration isolator. FIG. 11 is a vertical cross-sectional view illustrating a problem of the conventional example.
(1) Vibration isolator (2) Bottom telescopic cylinder (2a) Upper cylinder with bottom (2b) Lower cylinder with bottom (3) Compression spring (4) Sound insulation pad (5) Bolt body (5a) ... Spring locking insertion holes (21a) (21b) ... Cylindrical body (22a) (22b) ... Closed end (23a) (23b) ... Bolt insertion hole (31) ... Locking End (32) Cap (52) Bolt body (53) Nut

Claims (3)

An anti-vibration device comprising a compression spring interposed between the upper and lower mounts or the base and the load to support the load and absorb vibration, and end members provided at both ends of the compression spring. And
The compression spring has an end bent inside the spring main body, and the bent end of the compression spring is inserted into and engaged with the insertion hole of the connecting means protruding from the end member. Yes,
An end portion of a compression spring is embedded in a mold member provided in the end member . An anti-vibration device interposed between the upper mount and the lower mount or the base and the load,
A bottomed telescopic cylinder that expands and contracts in the axial direction and has an axial end closed, a compression spring that is housed in the cylinder, supports a load on the cylinder, and absorbs vibrations; It comprises connecting means for connecting the bottom telescopic cylinder,
The end of the compression spring is bent inside the spring body, and the bent end of the compression spring is inserted through an insertion hole of a connecting means protruding from a closed end of the bottomed telescopic cylinder. has been engaged Te,
A vibration isolator, wherein an end of a compression spring is embedded in a mold member provided on a closed end face of a bottomed telescopic cylinder . 3. The vibration isolator according to claim 1, wherein a stopper means for preventing the compression spring from falling out of the insertion hole for spring locking is attached to a distal end of the bent end of the compression spring.

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