JP7208422B1 - Anti-vibration device - Google Patents

Abstract

A vibration isolator capable of easily detecting the deflection amount of a coil spring and easily confirming that a suspended device is under a proper load is provided. A vibration isolator (10) for a ceiling-suspended device (50) installed on a slab via a suspension bolt (62) is provided with a coil spring (12) for supporting the load of the ceiling-suspended device (50) applied from a bracket (52) and absorbing vibrations. An upper rubber cap 14A and a lower rubber cap 14B are arranged at both ends of the coil spring 12, and a downward pin 18A serving as a load checking portion is provided at each of the opposed open ends of the upper rubber cap 14A and the lower rubber cap 14B. , and upward pins 18B are arranged to face each other. The downward pin 18A and the upward pin 18B have a length such that their ends contact each other when the weight of the device applied to the coil spring reaches a predetermined upper limit load within the appropriate load range. One thing can be confirmed. [Selection drawing] Fig. 2

Description

The present invention relates to an anti-vibration device that prevents transmission of vibration from a ceiling-suspended device (ceiling-suspended device), such as an air conditioner, that is suspended and fixed to the frame of a building with suspension bolts.

Conventionally, when a device that generates vibration such as an air conditioner is fixed to a support such as a ceiling surface with suspension bolts, the vibration of the suspended device can be suppressed by fixing it using a vibration isolator using a coil spring. It reduces or prevents transmission to the skeleton of the building via the support (Patent Document 1).

Such anti-vibration devices have a predetermined allowable load. Therefore, it is necessary to check that the weight of the suspended equipment does not exceed the allowable load of the anti-vibration device. need to check from time to time.

Conventionally, in order to check the amount of deflection (amount of compression) of the coil spring due to the weight of the suspended equipment, the total axial length of the anti-vibration device was measured with a scale or the like while the suspended equipment was suspended. A separately prepared deflection confirmation gauge is attached to the anti-vibration device during construction to detect the deflection of the coil spring and confirm that the weight of the suspended equipment does not exceed the allowable load.

FIG. 7 is an explanatory view showing an embodiment of a conventional vibration isolator using such a deflection amount confirmation gauge. FIG. FIG. 7B is a front view showing the limit where the weight of the vibration isolator 40 does not exceed the allowable load, and FIG. 7C shows a state where the weight of the vibration isolator 40 exceeds the allowable load. It is a front view showing.

Here, in the description of FIG. 7, the XYZ directions are directions orthogonal to each other. , the Y direction is the up-down direction, and the Z direction is the front-back direction. The +X side in the X direction is the right side, the -X side is the left side, the +Y side in the Y direction is the upper side, the -Y side is the lower side, the +Z side in the Z direction is the front side, and the -Z side is the rear side. This point is the same in the XYZ directions in FIGS. 1 to 6, which are the embodiments of the present invention.

As shown in FIG. 7A, the deflection amount confirmation gauge 44 is inserted between the bracket 52 of the ceiling-suspended device 50 and the anti-vibration device 40 toward the suspension bolt 62 . As shown in FIG. 7B, when the identification ring 42 of the anti-vibration device 40 can be seen through the confirmation slit 44a of the deflection amount confirmation gauge 44, the weight of the ceiling-suspended device 50 is equal to the proper load of the anti-vibration device 40. 7(C), when the identification ring 42 cannot be seen through the confirmation slit 44a and is completely hidden from the deflection amount confirmation gauge 44, the weight of the suspended device 50 exceeds the proper load range of the anti-vibration device 40 .

Japanese Patent Application Laid-Open No. 2008-020170 JP 2011-141013 A JP 2012-127438 A

However, in such a conventional method, in addition to the problem that a deflection amount confirmation gauge is separately required when installing a ceiling-suspended device using a vibration isolator, a deflection amount confirmation gauge separately prepared is required at the time of installation. There is also the problem of an increase in the work process of attaching to the anti-vibration device.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vibration isolator that can easily detect the amount of deflection of a coil spring and easily confirm that a suspended device is under a proper load. for the purpose.

[vibration isolator]
The present invention is a vibration isolator for equipment installed on a support via a suspension bolt,
A coil that is inserted through a suspension bolt and supported by a nut that screws onto the suspension bolt at its lower end, and supports the bracket of the device at its upper end to support the load of the device and absorbs vibrations applied from the device to prevent vibration. a spring;
a pair of cylindrical members arranged separately at both ends of the coil spring, the separation distance of which changes according to the axial displacement of the coil spring according to the load of the device;
When the weight of the device applied to the coil spring reaches a predetermined upper limit load in the proper load range, the coil spring is displaced so that the tips come into contact with each other. a load confirmation pin member protruding in opposition;
characterized by comprising

[Modified example of anti-vibration device]
In addition to the above-described coil spring and a pair of cylindrical holding members, a variation of the vibration isolator according to the present invention is displacement of the coil spring when the weight of the device applied to the coil spring reaches a predetermined upper limit load of the appropriate load range. A load confirmation portion may be provided that protrudes in the axial direction from either one of the opposed open end faces of the pair of cylindrical holding members so that the tips come into contact with each other.

Another modification of the vibration isolator according to the present invention is such that, in addition to the coil spring and the pair of cylindrical holding members described above, instead of the load confirmation pin member, the weight of the device applied to the coil spring is within the proper load range. When the upper limit load of the coil spring is reached, the coil springs are displaced so that the tips of the coil springs are not in contact with each other and are axially adjacent to each other without facing each of the opposed open end faces of the pair of cylindrical holding members. A load confirmation projection with a protruding load confirmation index may be provided.

[Integrated Formation of Cylindrical Holding Member and Load Checking Portion Made of Elastic Material]
The load confirming portion is a cylindrical pin or a rectangular protruding piece, and the cylindrical holding member and the load confirming portion are integrally formed of an elastic material.

[Multiple load confirmation pin members]
The load confirming portions protrude from a plurality of locations on the opposed opening ends of the pair of cylindrical holding members.

[Basic effect]
According to the present invention, the cylindrical holding member integrally formed with the load confirming portion is attached to both ends of the coil spring of the vibration isolator, so that both or either one of the coil springs can be installed when installing the ceiling-suspended device. It is possible to easily check whether or not the suspended equipment is under the proper load, depending on the positional relationship of the load confirmation part.

In addition, by arranging the two load confirmation parts at positions facing each other with the ceiling-suspended equipment installed, the cylindrical holding member facing both load confirmation parts or one load confirmation part faces each other during construction. If there is no contact, it is easy to confirm that the suspended equipment is at the proper load.

In addition, there is no need to prepare a separate gauge or the like for checking the amount of deflection of the coil spring, and an increase in cost due to an increase in the number of parts and man-hours can be suppressed.

[Effect of Integral Formation of Cylindrical Member and Pin Member by Elastic Material]
In addition, the load confirmation part is a cylindrical pin or a rectangular protruding piece, and the cylindrical holding member and the load confirmation part are integrally formed of an elastic material such as rubber, so that the load confirmation part can be easily formed. can be done.

In addition, even if the load confirmation part comes into contact with the suspended device when the load exceeds the proper load, damage can be avoided by elastic deformation.

[Effect of multiple load confirmation pin members]
In addition, the load confirming portions are arranged to protrude in the axial direction at a plurality of locations on the opposed opening end faces of the tubular holding member, so that when the equipment is installed using the vibration isolator, it becomes the surroundings. To easily confirm whether or not a load for suspending a device is within a proper load range from an arbitrary direction from the positional relationship of a load confirmation part.

FIG. 4 is an explanatory view showing a state of use in which the vibration isolator according to the present invention is used to install a ceiling-suspended device; FIG. 2 is an explanatory view showing the anti-vibration device of FIG. 1; FIG. 3 is a cross-sectional view showing the configuration of the anti-vibration device of FIG. 2; FIG. 4 is an illustration showing an embodiment of the holding member of FIG. 3; It is explanatory drawing which shows the construction procedure which installs an apparatus using the vibration isolator by this invention. FIG. 4 is an explanatory diagram showing another embodiment of the anti-vibration device according to the present invention; It is an explanatory view showing an embodiment of a conventional anti-vibration device.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a vibration isolator according to the present invention will be described in detail below with reference to the drawings. In addition, the present invention is not limited by the following embodiments.

[Basic concept of the embodiment]
First, the basic concept of the embodiment will be explained. Embodiments generally relate to a vibration isolator for equipment that is installed on a support via suspension bolts. Here, the "vibration isolator" is a device that reduces or prevents the vibration of equipment from being transmitted to a supporting body such as a building frame via hanging bolts.

The vibration isolator of this embodiment is composed of a coil spring, a pair of cylindrical holding members, and a load checking portion.

Here, the term "coil spring" refers to a cylindrical metal rod that is wound and then heat-treated to have springiness. Including springs is a concept. The "coil spring" of this embodiment is inserted into the suspension bolt and supported by a nut screwed to the suspension bolt at the lower end, and supports the bracket of the device at the upper end to support the load of the device and is applied from the device. It absorbs vibrations and provides vibration isolation, and constitutes the main part of the anti-vibration device.

Also, the "pair of cylindrical holding members" means those that are separately arranged (attached) at both ends of the coil spring, and the separation distance changes according to the axial displacement of the coil spring according to the load of the device. is.

In addition, the "load confirmation part" is a pair of cylindrical holding members that are arranged to contact each other due to displacement of the coil spring when the weight of the device applied to the coil spring reaches a predetermined upper limit load of the appropriate load range. projecting axially opposite each of the opposed open ends of the . Therefore, if the load confirming portions on both sides are not in contact with each other during construction, it can be easily confirmed that the suspended equipment is under the proper load.

In another embodiment of the present invention, the "load confirmation part" is configured so that when the weight of the device applied to the coil spring reaches a predetermined upper limit load in the appropriate load range, the coil spring is displaced so that the tips come into contact with each other. , which protrudes axially from either one of the opposed open ends of the cylindrical holding member. Therefore, if the load confirming portion is not in contact with the opposed cylindrical holding member during construction, it can be easily confirmed that the suspended equipment is under the proper load. In addition, since the load confirming portion is provided only on one side of the cylindrical holding member, there is no need to position the load confirming portions so as to face each other, which facilitates production.

Further, in another embodiment of the present invention, the "load confirmation part" has a non-contact tip due to displacement of the coil spring when the weight of the device applied to the coil spring reaches a predetermined upper limit load of the appropriate load range. A load confirmation part with a load confirmation index protruding axially adjacent to each other without facing each of the opposed open ends of the pair of tubular holding members so as to overshoot each other, and both loads If the load confirmation indicators of the confirmation part do not overshoot each other, it can be easily confirmed that the suspended equipment is properly loaded.

The "load confirmation part" of this embodiment is a cylindrical pin or a rectangular protruding piece, and the "cylindrical holding member and load confirmation part" are integrally formed of an elastic material such as rubber or soft synthetic resin. Therefore, even if the tip of the load confirming portion abuts against it, it can be elastically deformed to avoid damage.

In addition, the "load confirming part" of this embodiment projects from a plurality of places on the open end of the tubular holding member. is within the range of the proper load can be easily confirmed from the positional relationship of the load confirmation part.

Specific embodiments will be described below. In the specific embodiment shown below, the "pair of cylindrical holding members" are the "upper rubber cap and the lower rubber cap", and the "load confirmation member" is the "downward pin" of the upper rubber cap and the lower side. A case of the "upward pin" of the rubber cap will be described.

[Specific contents of the embodiment]
The tunnel disaster prevention system will be explained in more detail. The contents will be described separately as follows.
a. Configuration of anti-vibration device b. Construction procedure of the anti-vibration device c. Other embodiment

[a. Configuration of anti-vibration device]
FIG. 1 is an explanatory diagram showing a usage state in which a ceiling-suspended device is installed using the vibration isolator according to the present invention, FIG. 2 is an explanatory diagram showing the vibration isolator of FIG. 1, and FIG. 3 is the vibration isolator of FIG. FIG. 4 is a sectional view showing the configuration of the device, FIG. 4 is an explanatory diagram showing an embodiment of the rubber cap (holding member) 14 in FIG. 3, and FIG. Front half section and upper and lower planes, and FIG. 4B shows a front half section and upper and lower planes of the lower rubber cap (lower holding member) 14B.

As shown in FIG. 1 , a suspended device 50 is installed on a plurality of, for example, four suspension bolts 62 fixed to a building frame, eg, a slab 60 , using the vibration isolator 10 . In addition, in FIG. 1 , the installed ceiling-suspended equipment 50 is schematically shown, and two suspension bolts 62 and two vibration-isolating devices 10 are shown.

As shown in FIG. 2, the anti-vibration device 10 of this embodiment is inserted into the suspension bolt 62 and supported by nuts 56 and 58 screwed to the suspension bolt 62 at its lower end, and the ceiling-suspended device 50 at its upper end. The coil spring 12 that supports the bracket 52 to support the load of the suspended device 50, and the upper rubber caps 14A that are inserted into the suspension bolts 62 and function as a pair of cylindrical holding members arranged at both ends of the coil spring 12. A lower rubber cap 14B is provided, and a bracket 52 is fixed with a nut 54 via a rubber bush (elastic member) 24. As shown in FIG.

As shown in FIGS. 2 to 4, downward pins 18A and downward pins 18A functioning as load checking portions and upward The pins 18B are arranged so as to face each other in the axial direction, and are spaced apart from each other by a predetermined distance D when no load is applied to the coil spring 12 .

Also, the downward pin 18A and the upward pin 18B are formed integrally with the corresponding upper rubber cap 14A and lower rubber cap 14B using rubber, which is an elastic material. The upper rubber cap 14A and the lower rubber cap 14B having downward pins 18A and upward pins 18B may be made of soft synthetic resin instead of rubber.

Further, as shown in FIGS. 4A and 4B, downward pins 18A and upward pins 18B are provided at, for example, four locations on the peripheral wall end portions 16b of the upper rubber cap 14A and the lower rubber cap 14B. They are arranged separately so that the positional relationship between the downward pin 18A and the upward pin 18B can be confirmed from any direction around the vibration isolator 10. FIG.

The lengths of the downward pin 18A and the upward pin 18 are such that the ends of the coil spring 12 come into contact with each other due to displacement of the coil spring 12 when the load applied to the coil spring 12 reaches a predetermined upper limit load within the proper load range. is set. Therefore, if the downward pin 18A and the upward pin 18 do not come into contact with each other due to the displacement of the coil spring 12, it can be confirmed that the load applied to the coil spring 12 by the weight of the suspended device 50 is within the proper load range. .

In order to prevent deformation or damage to the upper rubber cap 14A and the lower rubber cap 14B, a washer 20 is provided between the upper rubber cap 14A and the coil spring 12, and a washer 20 is provided between the lower rubber cap 14B and the nut 56. A washer 22 is interposed in .

It should be noted that the mounting structure of the upper rubber cap 14A having the downward pin 18A and the upward pin 18 and the coil spring 12 having the coil spring 12 arranged at both ends thereof to the suspension bolt 62 and the bracket 52 is arbitrary. It is not limited.

As shown in FIG. 3, the vibration isolator 10 of this embodiment includes a coil spring 12, an upper rubber cap 14A having a downward pin 18A via a washer 20 at the upper end of the coil spring 12, and a washer 22 at the lower end. is produced as a vibration isolator assembly 10A which is an assembly with a lower rubber cap 14B provided with upward pins 18B arranged with 1 and 2, it is attached to suspension bolts 62 using nuts 54, 56, 68, rubber bushes 24, and brackets 52 to support and fix the suspended equipment 50 in a suspended state. It is.

[b. Construction procedure of the anti-vibration device]
5A and 5B are explanatory diagrams showing a construction procedure for installing a ceiling-suspended device using the anti-vibration device according to the present invention. FIG. (B) shows the process of mounting the suspended equipment 50 on the anti-vibration device 10 and performing level adjustment and confirmation of the appropriate load, and FIG. 5(C) shows the process of assembling all the parts and completing the construction. .

As shown in FIG. 5A, when installing the ceiling-suspended equipment 50 using the anti-vibration device 10, necessary parts are attached to all the suspension bolts 62 in advance. The mounting procedure consists of turning the nut 54 from below the suspension bolt 62, and then the anti-vibration device assembly shown in FIG. 10A is inserted, and nuts 56 and 58 are turned in.

Next, as shown in FIG. 5B, the bracket 52 of the ceiling-suspended device 50 is mounted on the anti-vibration device 10 attached to the suspension bolt 62 . Specifically, for all suspension bolts 62, the slits 52a (see FIG. 7) of the brackets 52 are inserted between the rubber bushes 24 inserted into the suspension bolts 62 and the upper rubber caps 14A.

When the ceiling-suspended device 50 is mounted on the anti-vibration device 10, the coil spring 12 is bent (compressed) by the load of the ceiling-hung device 50, so that a predetermined position of the ceiling-hung device 50, e.g. A nut 56 is turned to adjust the level in the height direction L with reference to the reference.

After that, the gap C between the downward pin 18A and the upward pin 18B is visually confirmed. If there is a gap C, the weight of the ceiling-suspended device 50 does not exceed the allowable load of the vibration isolator 10, that is, the vibration isolator 10 is appropriately selected for the ceiling-suspended device 50. can be confirmed.

If the downward pin 18A and the upward pin 18B are in contact with each other and there is no gap C, it is determined that the weight of the suspended device 50 exceeds the allowable load of the vibration isolator 10. Change to another anti-vibration device with a larger load.

When the gap C is confirmed, the vibration isolator 10 is fixed by tightening the nut 58 as shown in FIG. 5(C). After that, the protrusion of the rubber bush 24 is inserted into the hole of the upper rubber cap 14A through the slit 52a of the bracket 52, and the nut 54 is lightly tightened, for example, in order to prevent the ceiling-suspended device 50 from jumping up due to an earthquake or the like. By tightening by hand, the installation of the ceiling-suspended device 50 using the anti-vibration device 10 is completed.

[c. Other embodiments]
In the above-described embodiment, a cylindrical pin is provided as the load confirmation portion, but it is limited to a cylindrical pin as long as it is formed integrally with the peripheral wall end portion 16b of the upper rubber cap 14A and the lower rubber cap 14B. However, other shapes such as prismatic, conical, or pyramidal pins are also possible.

FIG. 6 is an explanatory diagram showing another embodiment of a vibration isolator according to the present invention, in which a rectangular protruding piece is used for load confirmation instead of the cylindrical upward pin 18A and downward pin 18B shown in FIG. It is characterized by being provided as a part.

FIG. 6(A) shows an embodiment of a vibration isolator 30A in which both the upper rubber cap 14A and the lower rubber cap 14B are provided with downward projecting pieces 26A and upward projecting pieces 26B for load confirmation. When installing the anti-vibration device 30A, a gap C between the downward projecting piece 26A and the upward projecting piece 26B is visually checked. As in FIG. 5B, if there is a gap C, the weight of the ceiling-suspended device 50 does not exceed the allowable load of the vibration isolation device 10, that is, the vibration-isolation device 10 It can be confirmed that it is properly selected.

FIG. 6(B) shows an embodiment of a vibration isolator 30B in which one of the upper rubber cap 14A and the lower rubber cap 14B, for example, the upper rubber cap 14A, is provided with a downward protruding piece 26C for checking the load. In the anti-vibration device 30B, the portion of the peripheral wall end 16b of the lower rubber cap 14B facing the downward projecting piece 26C corresponds to the upward projecting piece. visually check. If there is a gap C, the weight of the ceiling-suspended device 50 does not exceed the allowable load of the vibration isolator 10, that is, the vibration isolator 10 is appropriately selected for the ceiling-suspended device 50. can be confirmed.

FIG. 6(C) shows an embodiment of a vibration isolator 30C in which a load confirming index is provided on the projecting piece for load confirmation. In the antivibration device 30C, the downward protruding piece 26D and the upward protruding piece 26E are arranged adjacent to each other without facing each other. A load confirmation mark 32 is displayed as a load confirmation index on each of the downward projecting piece 26D and the upward projecting piece 26E. In this case, both load confirmation marks 32 are set so that their vertical directions match each other, and the vertical positional relationship between both load confirmation marks 32 allows the weight of the ceiling-suspended device 50 to be within the allowable range of the anti-vibration device 10. It is possible to check whether or not the allowable load of the load is exceeded.

6(B), the downward projecting piece 26C is a downward pin similar to that shown in FIG. 2, and the vibration isolator 30C of FIG. The piece 26D and upward projecting piece 26E may be downward and upward pins similar to those shown in FIG.

This completes the description of the embodiments of the vibration isolator according to the present invention. It is not limited by numerical values, etc. shown in the form.

10, 30A, 30B, 30C, 40: vibration isolator 10A: vibration isolator assembly 12: coil spring 14A: upper rubber cap 14B: lower rubber cap 16: peripheral wall portion 16a: peripheral wall inner portion 16b: peripheral wall end portion 18A: Downward pin 18B: Upward pins 20, 22: Washer 24: Rubber bush (elastic member)
26A, 26C, 26D: Downward projections 26B, 26E: Upward projections 32: Load confirmation mark 50: Ceiling suspension device 52: Brackets 54, 56, 58: Nut 60: Slab 62: Hanging bolt

Claims (5)

A vibration isolator for equipment installed on a support via a suspension bolt,
It is inserted through the suspension bolt and supported by a nut whose lower end is screwed to the suspension bolt, and whose upper end supports the bracket of the device to support the load of the device and absorb and prevent vibrations applied from the device. an oscillating coil spring;
a pair of cylindrical holding members arranged at both ends of the coil spring, the separation distance of which changes according to the axial displacement of the coil spring according to the load of the device;
The open ends of the pair of cylindrical holding members face each other so that the ends contact each other due to displacement of the coil springs when the weight of the device applied to the coil springs reaches a predetermined upper limit load within a proper load range. A load confirmation portion protruding axially facing each of the
An anti-vibration device comprising:
A vibration isolator for equipment installed on a support via a suspension bolt,
It is inserted through the suspension bolt and supported by a nut whose lower end is screwed to the suspension bolt, and whose upper end supports the bracket of the device to support the load of the device and absorb and prevent vibrations applied from the device. an oscillating coil spring;
a pair of cylindrical holding members arranged separately at both ends of the coil spring, the separation distance of which changes according to the axial displacement of the coil spring according to the load of the device;
When the weight of the device applied to the coil spring reaches a predetermined upper limit load within the appropriate load range, the opening ends of the pair of cylindrical holding members are arranged so that the ends contact each other due to the displacement of the coil spring. a load confirmation portion protruding in the axial direction from either one;
An anti-vibration device comprising:
A vibration isolator for equipment installed on a support via a suspension bolt,
It is inserted through the suspension bolt and supported by a nut whose lower end is screwed to the suspension bolt, and whose upper end supports the bracket of the device to support the load of the device and absorb and prevent vibrations applied from the device. an oscillating coil spring;
a pair of cylindrical holding members arranged separately at both ends of the coil spring, the separation distance of which changes according to the axial displacement of the coil spring according to the load of the device;
When the weight of the device applied to the coil spring reaches a predetermined upper limit load within the appropriate load range, the pair of cylindrical holding members are opposed to each other so that the tips of the coil springs are displaced without contact with each other. load confirming portions with load confirming indicia projecting axially adjacent to but not opposite each of the open ends;
An anti-vibration device comprising:
The vibration isolator according to any one of claims 1 to 3,
The vibration damping device according to claim 1, wherein the load confirming portion is a cylindrical pin or a rectangular protruding piece, and the cylindrical holding member and the load confirming portion are integrally formed of an elastic body.
The vibration isolator according to any one of claims 1 to 4,
A vibration isolator according to claim 1, wherein the load confirming portion protrudes from a plurality of locations of the opposed open end portions of the pair of cylindrical holding members.

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