JPS5822240Y2 - Simple soundproof cover - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the structure of a simple soundproof cover for machinery, and its purpose is to provide a soundproof cover that is convenient for transportation and storage and can be easily manufactured.

Soundproof covers that are placed over near compressors and other equipment that emit high noise to prevent leakage to the outside have been known for a long time, but conventional covers are mainly made of hard materials that are molded to fit the outside shape of the equipment before being molded. As a result, manufacturing is inefficient, and a large amount of space is required for transportation and storage, resulting in the disadvantage that the cost cannot be ignored.

This invention solves the above-mentioned drawbacks by using a flexible composite material and molding it into a flat bag.

In this invention, the material used is a flexible composite soundproof sheet in which a sound absorbing layer a and a high specific gravity viscoelastic material layer are layered.

The sound absorbing layer a is a heat resistant and flexible sound absorbing material;
For example, in addition to inorganic striated aggregates such as glass wool mats, asbestos mats, and rock wool mats, organic soft air-containing materials such as felt, felt-like mats made of heat-resistant synthetic fibers, and polyurethane foam can also be suitably used.

The high-density viscoelastic material layer is a high-density powder material contained in a viscoelastic material such as a soft blended rubber material such as natural rubber or synthetic rubber that is commonly blended, or a synthetic resin material such as vinyl chloride that is soft blended. For example, barium sulfate, silica powder, lead oxide, iron oxide, etc. are mixed in a large amount so that the specific gravity is about 1.5 to 2.0 or more. Layered with adhesive or sprayed as a liquid using latex material,
Alternatively, they are layered as molten materials by various molding methods such as extrusion and pressure welding. When using a solvent at this time, it is preferable to take measures to minimize the adhesive area as much as possible.

A flexible composite sound insulating sheet that has both the sound absorbing property of the above-mentioned sound absorbing layer a and the sound insulating property of the high specific gravity viscoelastic material layer, that is, has high sound insulating properties and is flexible and can be bent. The bag-forming pieces 1, 1 are obtained by cutting into a predetermined shape.

The bags 1, 1 are symmetrical to each other, and have a width equal to or more than half of the total length of the outer circumference of the article to be coated, and a width equal to or more than half the diameter of the top surface of the article to be coated (or the length of the long side in the case of a rectangular bag). The height is greater than the sum of 1/2 and the height, and the top side is 1
2, an oblique side 15.15 is provided on the side edges 13, 13 within a height range corresponding to the top diameter of the article to be coated, to prevent unnecessary protrusions generated on the top side of the article to be coated. In order to eliminate this, or both bag body forming pieces 1, 1 are
The two sides or one side 13, 13 may be joined together, and this side may be the fold line 14, thereby reducing the number of two joints, simplifying the process, and reducing sound leakage. .

For products to be coated to which a conduit for de-energizing wiring, supply/discharge of fuel or liquid material, etc. is connected, the conduit fitting hole 31. It is convenient to provide the lead-in strip 32 for the conduit and the opening/closing device 33 for opening and closing the conduit prior to joining 2 o'clock.

The bag-forming pieces 1, 1 are joined 2 at each side except the bottom side 11, 11, that is, the top side 12, and the side sides 13, 13.

It goes without saying that when the top side 12, etc. is the fold line 14, there is no need to rejoin 2, and it is also natural that it is preferable to have the sound absorbing layer aa on the inner surface because it has waterproof and dustproof effects. be.

The joining 2 is performed with the edges aligned, and both bag body forming pieces 1, 1 maintain a flat state.

The joining 2 is done by using an adhesive depending on the material, or by an appropriate means such as sewing or fusing.If necessary, a covering tape may be applied, and the sound absorbing layer a at the edge is cut out. Sometimes they are joined only by a layer of high-density viscoelastic material.

Since the simple soundproof cover of this invention has the above-mentioned structure, it is flat and has a small volume, making it convenient to store and transport.It not only saves costs, but also has flexibility when in use. By covering the article to be coated, it can be easily rolled out, and the pipe etc. can be led out without any trouble through the pipe insertion hole 31, etc., making it easy to handle. The cover absorbs and insulates sound in two stages, consisting of a sound-absorbing layer a and a high-density viscoelastic material layer, which is a sound-insulating layer, all around the circumference, so the sound-insulating properties are not inferior.

Furthermore, this structure has various features such as its simple structure, which allows it to be manufactured efficiently and to be supplied to low-lying locations.

Examples The flexible composite soundproof sheet used in the illustrated examples is made of glass wool bonded with a small amount of synthetic resin binder and has a thickness of 1Q mm.
A sound absorbing layer a consisting of a glass wool mat of The elastic material layer is layered with an epoxy resin adhesive C at regular intervals in the form of a band, from which the connected bag forming pieces 1, 1 are punched out.

In this example, a sheet having a width corresponding to the width of the bag-forming pieces 1, 1 is prepared in advance as a sheet for layering the high-density viscoelastic material, and the sound-absorbing sheet is made narrower by the amount of bonding. Layering mats are stacked, adhesive C is applied in strips at intervals twice the height of the bag forming pieces 1, 1, and layered material is used, cut to a regular length, and the center It is cut out by making V-shaped notches 4.4 from both sides of the position, and the sound absorbing layer is also deeply cut in these notches 4,4.

This cutting can be done by wave processing and does not require any special machinery.

As shown in FIG. 3, the connected bag-forming pieces 1, 1 on the section are joined together at the top sides 12, 12 via the fold line 14, and have an oblique side 15.15. , fold this from the fold line 14 so as to match the sound absorbing layer a,
The simple soundproof cover of this example is obtained by joining 2 under pressure from the oblique side 15.15 to the side sides 13, 13 by a heat fusion method.

However, before joining 2, one of the bags 1 has a conduit fitting hole 31. An introduction strip 32 is bored, and two sets of opening/closing tools 33 and 33 consisting of stop buttons 331, 331 and a knot 332 are attached to both sides of the introduction strip 33.

This example product has the above-mentioned structure, and not only exhibits the effects of the invention described above, but also has the connection 2 reliably performed, and the top sides 12 and 12 sides are integrally connected by the fold line 14. Even if it is bonded only with adhesive C at the lower part, it is strong and has an effect that does not reduce the soundproofing effect.

[Brief explanation of the drawing]

The drawings show an embodiment; FIG. 1 is a plan view thereof, FIG. 2 is a sectional view taken along the line A-A' in FIG. 1, and FIG. 3 is a developed view of the bag. a...Sound absorbing layer, b...High specific gravity viscoelastic material layer, C...Adhesive, 1...Bag body forming piece, 11... ...Base, 12...Top, 1
3...Side edge, 14...Fold line, 15.
... Hypotenuse, 2 ... Joining, 31 ...
・Conduit fitting hole, 32...Introduction strip, 33...
... Opening/closing tool, 331... Stop button, 332...
...Knot string, 4...Notch.

Claims (1)

[Claims for Utility Model Registration] 1. Symmetrical bag-forming pieces 1, 1 made of a flexible composite sound-insulating sheet formed by layering a sound-absorbing layer a and a high-density viscoelastic material layer.
A simple soundproof cover is formed by joining 2 to each other at the top side 12 and side sides 13 degrees 13 excluding the bottom side 11 to form a flat bag body. 2. A simple soundproof cover according to claim 1, in which the sound-absorbing layer a is an inorganic filament aggregate. 3. A practical sound-insulating cover according to claim 1, in which the sound-absorbing layer a is made of an inorganic striated aggregate. 3. The high-density viscoelastic material layer is made of a soft thermoplastic synthetic resin mixed with a high-density powder. Registration of a simple soundproof cover 4 as claimed in claim 1 or 2.Registration of a utility model in which the sound absorbing layer a and the high-density viscoelastic material layer are bonded only on the bottom side 11 of the bag-forming piece 1. A simple soundproof cover according to any one of claims 1 to 3. 5 Utility model registration claims 1 to 5 in which the top sides 12 and 12 are joined by folding lines 14 and both bag body forming pieces 1, 1 are formed by a continuous, integrated flexible composite soundproof sheet. A simple soundproof cover described in any one of Item 4. 6. Oblique sides 15. between the top side 12 and the side sides 13, 13, respectively.
15, and the bag body forming pieces 1, 1 are attached to the corresponding hypotenuse 15.1.
5. The simple soundproof cover according to any one of claims 1 to 5, which is also formed by joining 2. 7 Utility model registration claims 1 to 6, in which a conduit fitting hole 31, its introduction strip 32, and an opening/closing tool 33 for opening and closing the introduction strip are provided at appropriate positions in the bag forming pieces 1, 1 A simple soundproofing cup according to any one of claims 1 to 8, wherein the 8 bag-forming pieces 1, 1 are joined together 2 with a high-density viscoelastic material layer on the outer surface. Simple soundproof cover 9 according to any one of item 7. Scope of the utility model registration claim, in which the bag-forming pieces 1 and 1 are joined together only between the high-density viscoelastic material layers and b. The simple soundproof cover according to any one of items 1 to 8. The high-density viscoelastic material layers made of thermoplastic synthetic resin mixed with IO high-density powder are bonded together by fusion 2.
A simple soundproof cover according to claim 9 of the utility model registration claim