CA2075757A1 - Sound insulating door - Google Patents
Sound insulating doorInfo
- Publication number
- CA2075757A1 CA2075757A1 CA002075757A CA2075757A CA2075757A1 CA 2075757 A1 CA2075757 A1 CA 2075757A1 CA 002075757 A CA002075757 A CA 002075757A CA 2075757 A CA2075757 A CA 2075757A CA 2075757 A1 CA2075757 A1 CA 2075757A1
- Authority
- CA
- Canada
- Prior art keywords
- sound insulating
- fact
- door
- metal plate
- door according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000002184 metal Substances 0.000 claims abstract description 36
- 239000011810 insulating material Substances 0.000 claims abstract description 25
- 238000012360 testing method Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 10
- 230000007246 mechanism Effects 0.000 claims description 7
- 239000010426 asphalt Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims 1
- 238000013016 damping Methods 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 230000002426 anti-panic effect Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 239000011491 glass wool Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 208000002193 Pain Diseases 0.000 description 1
- 241000206607 Porphyra umbilicalis Species 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036407 pain Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
- E06B5/20—Doors, windows, or like closures for special purposes; Border constructions therefor for insulation against noise
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B2001/8423—Tray or frame type panels or blocks, with or without acoustical filling
- E04B2001/8452—Tray or frame type panels or blocks, with or without acoustical filling with peripheral frame members
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
- Special Wing (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The invention relates to a sound insulating door designed, in particular, to close test chambers for noisy apparatus such as jet engines.
According to the invention, the door comprises the following internal structure:
- a rigid inner metal plate (12), - a sound insulating material (13), - an elastically mounted metal plate (14), - a sound insulating material (15), - a rigid outer metal plate (16).
The use of an elastically mounted central metal plate (14) makes it possible to eliminate any phenomena of interference liable to exist between the insulating materials (13 and 15).
The invention is designed for the constructors and users of sound insulating materials.
Figure 2.
The invention relates to a sound insulating door designed, in particular, to close test chambers for noisy apparatus such as jet engines.
According to the invention, the door comprises the following internal structure:
- a rigid inner metal plate (12), - a sound insulating material (13), - an elastically mounted metal plate (14), - a sound insulating material (15), - a rigid outer metal plate (16).
The use of an elastically mounted central metal plate (14) makes it possible to eliminate any phenomena of interference liable to exist between the insulating materials (13 and 15).
The invention is designed for the constructors and users of sound insulating materials.
Figure 2.
Description
, 2~5~7 BACKGROUND OF THE INVENTION
FIELD OF THE INVENTTON
The invention relates to a sound insulating door designed, for example, to close test chambers for nGisy apparatus such as jet engines.
THE PRIOR ART
In many fields of construction and industry, it is frequently necessary to soundproof noisy equipment and, notably, to surround a particularly noisy sound source with a soundproof enclosure. The processes for producing such enclosures are well known; nonetheless, difficulties are encountered with regard to the openings and, in particular, th0 doors.
It proves difficult to produce this type of door as a compromise has to be found between the weight that can be mechanically supported and the noise damping factor. That is why it is a vital element in the construction of a soundproofed enclosure and it is particularly important to take pains in manufacturing the door.
It is known that the use of a high density, and thus heavy, material favours the damping of low frequency noises. However, 20 extensive use of this type of high density material makes the door very heavy and makes it necessary to reinforce it. This is a critical point as the reinforcements are generally produced using metallic sections which, in their turn, create noise backgrounds that are extremely prejudicial to the noise damping factor. The 25 havy doors are also more difficult to manoe w er and necessitate the use of special locking and articulation systems which are particularly conplex.
To cover a relatively broad frequency spectrum, the doors use different types of insulating material, each having a frequency range in which they are more active. To permit their installation, the doors are divided into compartments using rigid intermediate partitions that act as separators. These partitions serve to maintain the insulating materials, which are generally very flexible.
Another delicate point also encountered in the development of
FIELD OF THE INVENTTON
The invention relates to a sound insulating door designed, for example, to close test chambers for nGisy apparatus such as jet engines.
THE PRIOR ART
In many fields of construction and industry, it is frequently necessary to soundproof noisy equipment and, notably, to surround a particularly noisy sound source with a soundproof enclosure. The processes for producing such enclosures are well known; nonetheless, difficulties are encountered with regard to the openings and, in particular, th0 doors.
It proves difficult to produce this type of door as a compromise has to be found between the weight that can be mechanically supported and the noise damping factor. That is why it is a vital element in the construction of a soundproofed enclosure and it is particularly important to take pains in manufacturing the door.
It is known that the use of a high density, and thus heavy, material favours the damping of low frequency noises. However, 20 extensive use of this type of high density material makes the door very heavy and makes it necessary to reinforce it. This is a critical point as the reinforcements are generally produced using metallic sections which, in their turn, create noise backgrounds that are extremely prejudicial to the noise damping factor. The 25 havy doors are also more difficult to manoe w er and necessitate the use of special locking and articulation systems which are particularly conplex.
To cover a relatively broad frequency spectrum, the doors use different types of insulating material, each having a frequency range in which they are more active. To permit their installation, the doors are divided into compartments using rigid intermediate partitions that act as separators. These partitions serve to maintain the insulating materials, which are generally very flexible.
Another delicate point also encountered in the development of
2~ S~
sound insulating doors concerns the tightness of the door. Indeed, the joints must not form pre~erential passages for noises, although, generally, from the construction viewpoint, an interval is left between the door and its frame. At the present time, the man of the s art makes use of peripheral seals that are subjected to considerable compression to ensure tightness. These seals tend to lose their elasticity and thus no longer perform their function.
SUMMARY OF THE INVENTION
The main object of the present invention is to provide a sound 10 insulating door which combines lightness and efficiency. With regard to performance, the example given in the following description permits damping in the order of 50 dB, while, with a more sophisticated design, this can be increased to 60 dB. It should be stressed that these characteristics are obtained with a door weight 15 that is well below the mean, in the order of 1 ton.
The door is efficient over a very extensive frequency spectrum, despite its small overall thickness.
Another object of the present invention is to provide a sound insulating door which also has ant;-fire properties. Also in 20 connection with safety, the sound insulating door according to the present invention is equipped with a quick-opening device actuated by an 'anti-panic' button.
Further objects and advantages of the present invention will emerge in the course of the following description which is provided, 25 however, solely by way of information.
According to the invention, the sound insulating door designed, in particular9 to close test chambers for noisy equipment such as jet engines, which comprises a frame fixed in the walls of the chamber, articulating hinges and a locking mechanism, is 30 characterized by the fact it has the following structure:
- a rigid outer metal plate, - a soundproofing material, - one or more elastically mounted central metal plates, - a soundproofing material, - a rigid outer metal plate.
_3_ 2~ 3~7 The invention will be more readily understood as a result of reading the following description accompanied by the annexed drawings.
THE DRAWIN~S
- figure 1 is a front view of the sound insulating door according to the invention, - figure 2 is a cross-sectional view of the internal structure of the door, - figure 3 is a cross-sectional view of a sound insulating door 10 with enhanced properties, - figure 4 illustrates the locking mechanism.
DESC~IPTION OF THE PREFERRED EMBODIMENT
The present invention relates to a sound insulating door designed, for example, to close test chambers andJor soundproofed 15 enclosures around noisy apparatus.
To permit the operation, or the inspection or testing, of certain items of equipment that are extremely noisy when in operation, it is necessary to make use of entirely soundproofed rooms in order to avoid inconvenience to the environment and the 20 technical personnel. Use is generally made of buildings with solid walls having coatings of absorbent material. The soundproofed enclosures naturally have access doors, which must also be of a sound insulating typa in order to conform to the general soundproofing measures adopted. In this connection, certain 25 technical design difficulties are encountered as, in order to achieve the desired insulation objectives, it is necessary to use an extremely heavy door. The sound frequencies of the noise to be attenuated are extremely wide and varied; now, the absorption characteristics of the insulating materials are a function of 30 frequency, whence the use of several types of insulating material in order to cover a broad spectrum of frequencies to be damped.
At the present time, constructors manufacture doors provided with several compartments separated by rigid partitions and in which are placed the different insulating materials chosen. As a result of 35 this arrangement, there occurs a sort of interference in the form of -4- 2~7;~ 5~
sound bridges between the contiguous insulating materials, which substantially lowers their individual performance.
Furthermore, certain soundproofing shortcomings are noted at the periphery of the door owing to the existence of a slight space between it and the frame. Present tightness-ensuring techniques using compressed peripheral seals have very limited useful lives owing to the crushing of the seal, which very quickly loses its properties.
The sound insulating door accordin~ to the present invention provides a solution to these problems thanks to an improvement in properties, also associated with a reduction in weight.
Figure 1 is a front view of the sound insulating door 1 according to the present invention. This door 1 comprises a frame 2 designed to be fixed to the walls of the test chamber that they surround.
Sound insulating door 1 also comprises articulating hinges 3 which interconnect frame 2 and the leaf, 4, of door 1. In the examp1e chosen, two hinges suffice, given the moderate weight of the des~gn in question.
Sound ~nsulating door 1 a7so comprises a locking mechanism operated by a handle 6.
The details of the internal architecture of door 1 are illustrated in figure 2, which is a cross-section of a preferred form of embodiment of the i m ention. Frame 2 is firstly formed by a bearing section 7 designed to be fixed to the enclosure. This U-shaped section 7 is extremely rigid and enables the door to be fixed to the enclosure. Frame 2 also comprises a supporting peripheral metal plate 8 maintained by two angle irons 9 and 10 on section 7. It is to this plate 8 that hinges 3 are fixed, and the plate will also serve as a supporting plane for the seals to oe described subsequently. Door frame 2 is also composed of a frame 11 formed by an assembly of tubular sections with a square cross-section in the example chosen. This frame 11 will also serve to support the second seal, to be described below.
As regards leaf 4 of door 1, this has the following structure: a rigid outer metal plate 12, a soundproofing material 13, an - . .:
. ., -5~ 757 elastically mounted central metal plate 14, a soundproofing material 15 and~ finally, a rigid outer metal plate 16, such as the one illustrated in figure 2.
In this way, door 1 is divided into compartments owing to the presence of central37et81 plate 1~, which permits the definition of the two compartments ~n which insulating materials 13 and 15 are placed respectively. The flexible mounting of central metal plate 14 makes it possible to preserve the integrity of the insulating properties of each of materials 13 and 15. This is a valuable asset as, unlike prior designs wherein the central metal plate serving to divide the door into compartments was mounted rigidly and there was prejudicial interference between the damping elements, flexible mounting makes it possible to accumulate the soundproofing properties. This makes it possible to cover a broad range of `
attenuated frequencies with a relatively small thickness of insulating material. Practically speaking, use can be made, for example, of a diaphragm to support central metal plate 14 or, more simply, the waddings 13 and 15 of insulating material can themselves be used to ensure that central metal plate 14 is actually held in place.
The value of this technique ~ill be all the more appreciable in that the insulating materials used for compartments 37 and 38 will have different density characteristics. ~or example, use can be made of a glass wool based insulating material the density of which is 70 k/m3 to fill compartment 37, and a glass wool with a density of 100 k/m3 to fill compartment 38 .
- Similarly, the respective volumes of compartments37 and 38 can be different and, ~n the example chosen, the low density insulating material 13 occupies a volume that is twice that of the high density insulating material 15.
The edges of central metal plate 14 can, for example~ be slightly separated from the periphery of the door to prevent any contact, or simply pressed against this periphery without any rigid system of fixing.
The surround of leaf 4 of door 1 is formed by a sheet metal . -:
-6- Z~7S757 section 17 the inside of which is filled with insulating material 18. Tne edges of the door are fo~med by a perforated metal plate 19 the positioning of which in relation to section 17 is adjustable.
This makes it possible to reduce the distance between leaf 4 and frame 2. Thus sound leakage is reduced and, thanks to the holes in perforated metal plate 19, it is also possible to absorb the sounds that transit via the existing interval.
It should be noted that outer edge 20 of door 1, i.e. opposite hinges 3, will preferably be inclined as represented in figure 2.
This bevelled external shape makes it possible to enhance the sound insulation by reducing the interval between edge 20 and metal plate 8, at the same time allowing for the relatively great thickness of the door.
Test have shown that large noise leakages were encountered as a consequence of a lack of tightness between leaf 4 and frame 2. For this purpose, the invention recommends the use of peripheral seals, for example of closed-cell neoprene, the first of which, 21, is placed between rigid outer metal plate 16 and frame section 8, as illustrated in figure 2. The second seal, 22, is placed between the second rigid outer metal plate 12 and frame section 11.
The sound insulating door as described perm1ts up to approximately 51 dB attenuation of noises over a broad frequency band for a door weight of 250 kg to 1 ton, according to dimensions.
Under certain circumstances, it is necessary to achieve up to 60 dB noise reduction. To achieve such a performance, it is necessary to undertake certain modifications to the inner structure of the door, as in figure 3. In this case, leaf 4 of door 1 has the following structure: a rigid outer metal plate 12 identical with the previous one; the same applies to the first compartment 37 filled with insulating material; however, this time, two central metal plates 23 and 24 are interposed, separated by a belt of air 25. The rest of the door remains the same as before, that is to say a second compartment 38 containing insulating material and a rigid outer metal plate 16. Advantageously, all the faces of the walls located lnside leaf 4 of door 1 will be covered by a layer of high density -- ~
. .
2~S7~7 bitumen which very substantially enhances noise attenuation~ Central metal plates 23 and 24 are separated by spacing pieces 27. These central metal plates 23 and 24 are not fixed and are freely mounted inside door 1. It would, of course, be possible to conceive of using several compartments separated by different central metal plates at least some of which are freely mounted.
As to the closing mechanism, this comprises an operating laver 6 articulated about a control pin 28, as represented in figure 3. The rotation of control lever 6 can be obtained directly or via an 'anti-panic' pushbutton 29, the pin of which passes through the door and presses against lever 6.
Figure 4 illustrates locking mechanism 5 properly speaking.
Control pin 28 pivots in a journal 29 fixed to outer metal plate 16 ~ lever 30 fixed to control pin 28 is connected to a chain 31 the end of which is connected to the pin of latch 32. This latch slides freely in a support 33 and is held in extended position via a spring 34. The travel of latch 32 in extended position is limited by a nut 35.
When control pin 28 is operated using lever arm 6, lever 30 is rotated and drives chain 31, pulling on latch 32 to release the locking system. Apart from the action on lever 6, spring 34 ensures the return of latch 32 to locking position. The whole is enclosed by a housing 36.
In the chosen example in figure 1, door 1 is provided with a double locking system 5, which enables it to withstand external pressures in the order of 750 kg/m2. Given the stresses encountered and the weight of the door, it is necessary to make use of a special locking system.
Further embodiments of the present invention within the reach of a man of the art could also be contemplated without thereby departing from the scope thereof.
.
sound insulating doors concerns the tightness of the door. Indeed, the joints must not form pre~erential passages for noises, although, generally, from the construction viewpoint, an interval is left between the door and its frame. At the present time, the man of the s art makes use of peripheral seals that are subjected to considerable compression to ensure tightness. These seals tend to lose their elasticity and thus no longer perform their function.
SUMMARY OF THE INVENTION
The main object of the present invention is to provide a sound 10 insulating door which combines lightness and efficiency. With regard to performance, the example given in the following description permits damping in the order of 50 dB, while, with a more sophisticated design, this can be increased to 60 dB. It should be stressed that these characteristics are obtained with a door weight 15 that is well below the mean, in the order of 1 ton.
The door is efficient over a very extensive frequency spectrum, despite its small overall thickness.
Another object of the present invention is to provide a sound insulating door which also has ant;-fire properties. Also in 20 connection with safety, the sound insulating door according to the present invention is equipped with a quick-opening device actuated by an 'anti-panic' button.
Further objects and advantages of the present invention will emerge in the course of the following description which is provided, 25 however, solely by way of information.
According to the invention, the sound insulating door designed, in particular9 to close test chambers for noisy equipment such as jet engines, which comprises a frame fixed in the walls of the chamber, articulating hinges and a locking mechanism, is 30 characterized by the fact it has the following structure:
- a rigid outer metal plate, - a soundproofing material, - one or more elastically mounted central metal plates, - a soundproofing material, - a rigid outer metal plate.
_3_ 2~ 3~7 The invention will be more readily understood as a result of reading the following description accompanied by the annexed drawings.
THE DRAWIN~S
- figure 1 is a front view of the sound insulating door according to the invention, - figure 2 is a cross-sectional view of the internal structure of the door, - figure 3 is a cross-sectional view of a sound insulating door 10 with enhanced properties, - figure 4 illustrates the locking mechanism.
DESC~IPTION OF THE PREFERRED EMBODIMENT
The present invention relates to a sound insulating door designed, for example, to close test chambers andJor soundproofed 15 enclosures around noisy apparatus.
To permit the operation, or the inspection or testing, of certain items of equipment that are extremely noisy when in operation, it is necessary to make use of entirely soundproofed rooms in order to avoid inconvenience to the environment and the 20 technical personnel. Use is generally made of buildings with solid walls having coatings of absorbent material. The soundproofed enclosures naturally have access doors, which must also be of a sound insulating typa in order to conform to the general soundproofing measures adopted. In this connection, certain 25 technical design difficulties are encountered as, in order to achieve the desired insulation objectives, it is necessary to use an extremely heavy door. The sound frequencies of the noise to be attenuated are extremely wide and varied; now, the absorption characteristics of the insulating materials are a function of 30 frequency, whence the use of several types of insulating material in order to cover a broad spectrum of frequencies to be damped.
At the present time, constructors manufacture doors provided with several compartments separated by rigid partitions and in which are placed the different insulating materials chosen. As a result of 35 this arrangement, there occurs a sort of interference in the form of -4- 2~7;~ 5~
sound bridges between the contiguous insulating materials, which substantially lowers their individual performance.
Furthermore, certain soundproofing shortcomings are noted at the periphery of the door owing to the existence of a slight space between it and the frame. Present tightness-ensuring techniques using compressed peripheral seals have very limited useful lives owing to the crushing of the seal, which very quickly loses its properties.
The sound insulating door accordin~ to the present invention provides a solution to these problems thanks to an improvement in properties, also associated with a reduction in weight.
Figure 1 is a front view of the sound insulating door 1 according to the present invention. This door 1 comprises a frame 2 designed to be fixed to the walls of the test chamber that they surround.
Sound insulating door 1 also comprises articulating hinges 3 which interconnect frame 2 and the leaf, 4, of door 1. In the examp1e chosen, two hinges suffice, given the moderate weight of the des~gn in question.
Sound ~nsulating door 1 a7so comprises a locking mechanism operated by a handle 6.
The details of the internal architecture of door 1 are illustrated in figure 2, which is a cross-section of a preferred form of embodiment of the i m ention. Frame 2 is firstly formed by a bearing section 7 designed to be fixed to the enclosure. This U-shaped section 7 is extremely rigid and enables the door to be fixed to the enclosure. Frame 2 also comprises a supporting peripheral metal plate 8 maintained by two angle irons 9 and 10 on section 7. It is to this plate 8 that hinges 3 are fixed, and the plate will also serve as a supporting plane for the seals to oe described subsequently. Door frame 2 is also composed of a frame 11 formed by an assembly of tubular sections with a square cross-section in the example chosen. This frame 11 will also serve to support the second seal, to be described below.
As regards leaf 4 of door 1, this has the following structure: a rigid outer metal plate 12, a soundproofing material 13, an - . .:
. ., -5~ 757 elastically mounted central metal plate 14, a soundproofing material 15 and~ finally, a rigid outer metal plate 16, such as the one illustrated in figure 2.
In this way, door 1 is divided into compartments owing to the presence of central37et81 plate 1~, which permits the definition of the two compartments ~n which insulating materials 13 and 15 are placed respectively. The flexible mounting of central metal plate 14 makes it possible to preserve the integrity of the insulating properties of each of materials 13 and 15. This is a valuable asset as, unlike prior designs wherein the central metal plate serving to divide the door into compartments was mounted rigidly and there was prejudicial interference between the damping elements, flexible mounting makes it possible to accumulate the soundproofing properties. This makes it possible to cover a broad range of `
attenuated frequencies with a relatively small thickness of insulating material. Practically speaking, use can be made, for example, of a diaphragm to support central metal plate 14 or, more simply, the waddings 13 and 15 of insulating material can themselves be used to ensure that central metal plate 14 is actually held in place.
The value of this technique ~ill be all the more appreciable in that the insulating materials used for compartments 37 and 38 will have different density characteristics. ~or example, use can be made of a glass wool based insulating material the density of which is 70 k/m3 to fill compartment 37, and a glass wool with a density of 100 k/m3 to fill compartment 38 .
- Similarly, the respective volumes of compartments37 and 38 can be different and, ~n the example chosen, the low density insulating material 13 occupies a volume that is twice that of the high density insulating material 15.
The edges of central metal plate 14 can, for example~ be slightly separated from the periphery of the door to prevent any contact, or simply pressed against this periphery without any rigid system of fixing.
The surround of leaf 4 of door 1 is formed by a sheet metal . -:
-6- Z~7S757 section 17 the inside of which is filled with insulating material 18. Tne edges of the door are fo~med by a perforated metal plate 19 the positioning of which in relation to section 17 is adjustable.
This makes it possible to reduce the distance between leaf 4 and frame 2. Thus sound leakage is reduced and, thanks to the holes in perforated metal plate 19, it is also possible to absorb the sounds that transit via the existing interval.
It should be noted that outer edge 20 of door 1, i.e. opposite hinges 3, will preferably be inclined as represented in figure 2.
This bevelled external shape makes it possible to enhance the sound insulation by reducing the interval between edge 20 and metal plate 8, at the same time allowing for the relatively great thickness of the door.
Test have shown that large noise leakages were encountered as a consequence of a lack of tightness between leaf 4 and frame 2. For this purpose, the invention recommends the use of peripheral seals, for example of closed-cell neoprene, the first of which, 21, is placed between rigid outer metal plate 16 and frame section 8, as illustrated in figure 2. The second seal, 22, is placed between the second rigid outer metal plate 12 and frame section 11.
The sound insulating door as described perm1ts up to approximately 51 dB attenuation of noises over a broad frequency band for a door weight of 250 kg to 1 ton, according to dimensions.
Under certain circumstances, it is necessary to achieve up to 60 dB noise reduction. To achieve such a performance, it is necessary to undertake certain modifications to the inner structure of the door, as in figure 3. In this case, leaf 4 of door 1 has the following structure: a rigid outer metal plate 12 identical with the previous one; the same applies to the first compartment 37 filled with insulating material; however, this time, two central metal plates 23 and 24 are interposed, separated by a belt of air 25. The rest of the door remains the same as before, that is to say a second compartment 38 containing insulating material and a rigid outer metal plate 16. Advantageously, all the faces of the walls located lnside leaf 4 of door 1 will be covered by a layer of high density -- ~
. .
2~S7~7 bitumen which very substantially enhances noise attenuation~ Central metal plates 23 and 24 are separated by spacing pieces 27. These central metal plates 23 and 24 are not fixed and are freely mounted inside door 1. It would, of course, be possible to conceive of using several compartments separated by different central metal plates at least some of which are freely mounted.
As to the closing mechanism, this comprises an operating laver 6 articulated about a control pin 28, as represented in figure 3. The rotation of control lever 6 can be obtained directly or via an 'anti-panic' pushbutton 29, the pin of which passes through the door and presses against lever 6.
Figure 4 illustrates locking mechanism 5 properly speaking.
Control pin 28 pivots in a journal 29 fixed to outer metal plate 16 ~ lever 30 fixed to control pin 28 is connected to a chain 31 the end of which is connected to the pin of latch 32. This latch slides freely in a support 33 and is held in extended position via a spring 34. The travel of latch 32 in extended position is limited by a nut 35.
When control pin 28 is operated using lever arm 6, lever 30 is rotated and drives chain 31, pulling on latch 32 to release the locking system. Apart from the action on lever 6, spring 34 ensures the return of latch 32 to locking position. The whole is enclosed by a housing 36.
In the chosen example in figure 1, door 1 is provided with a double locking system 5, which enables it to withstand external pressures in the order of 750 kg/m2. Given the stresses encountered and the weight of the door, it is necessary to make use of a special locking system.
Further embodiments of the present invention within the reach of a man of the art could also be contemplated without thereby departing from the scope thereof.
.
Claims (10)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Sound insulating door designed, in particular, to close test chambers for noisy apparatus such as jet engines, which includes a frame fixed in the walls of the chamber, articulating hinges (3) and a locking mechanism, characterized by the fact that it has the following structure:
- a rigid outer metal plate, - a sound insulating material, - one of more elastically mounted central metal plates, - a sound insulating material, - a rigid outer metal plate.
- a rigid outer metal plate, - a sound insulating material, - one of more elastically mounted central metal plates, - a sound insulating material, - a rigid outer metal plate.
2. Sound insulating door according to claim 1, characterized by the fact that the insulating materials located on either side of the central metal plate have different density characteristics.
3. Sound insulating door according to claim 1, characterized by the fact that the inner walls of the door are covered by a bitumen coating.
4. Sound insulating door according to claim 1, characterized by the fact that the surround of the leaf of the door formed by a solid section and by an external perforated metal plate with an intermediate insulating material.
6. Sound insulating door according to claim 4, characterized by the fact that the perforated metal plate is adjustable to press against the frame.
6. Sound insulating door according to claim 1, characterized by the fact that two closed-cell neoprene seals are located on the surround of the leaf of the door.
7. Sound insulating door according to claim 4, characterized by the fact that the outer edge of the door is inclined.
8. Sound insulating door according to claim 6, characterized by the fact that the seals are intercalated between the outer metal plates and the door frame.
9. Sound insulating door according to claim 2, characterized by the fact that the insulating materials occupy respectively one third of the internal volume, in the case of the high density material, and two thirds of the internal volume, in that of the low density material.
10. Sound insulating door according to claim 1, characterized by the fact that the locking mechanism comprises an articulated lever for driving a control pin which, via a chain, operates the closing latch biased into its support by a spring.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9108501A FR2678674A1 (en) | 1991-07-01 | 1991-07-01 | Sound-insulating (soundproofing) door |
| EP92440095A EP0582015A1 (en) | 1991-07-01 | 1992-08-06 | Sound-insulating door |
| CA002075757A CA2075757A1 (en) | 1991-07-01 | 1992-08-11 | Sound insulating door |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9108501A FR2678674A1 (en) | 1991-07-01 | 1991-07-01 | Sound-insulating (soundproofing) door |
| CA002075757A CA2075757A1 (en) | 1991-07-01 | 1992-08-11 | Sound insulating door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2075757A1 true CA2075757A1 (en) | 1994-02-12 |
Family
ID=25675421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002075757A Abandoned CA2075757A1 (en) | 1991-07-01 | 1992-08-11 | Sound insulating door |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0582015A1 (en) |
| CA (1) | CA2075757A1 (en) |
| FR (1) | FR2678674A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109458113B (en) * | 2018-10-19 | 2020-10-27 | 佛山市南海崇泰防火材料有限公司 | Sound-insulation fireproof gasket and preparation method thereof |
| CN113530413A (en) * | 2021-06-18 | 2021-10-22 | 浙江嘉宝工贸有限公司 | High-strength armored door with sandwich composite layer |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR77763E (en) * | 1960-05-20 | 1962-04-20 | Improvements made to assemblies such as doors, especially metallic | |
| SE396981B (en) * | 1975-10-09 | 1977-10-10 | Ingemanssons Ingenjorsbyra Ab | SOUND INSULATING DOOR CONSTRUCTION |
| FR2426143A1 (en) * | 1978-05-16 | 1979-12-14 | Hekpazo Denis | Sound insulating fire door - has bi-rebated edges with steel lined boards on Z=section frame confining mineral wool with corrugated metal core |
| DE8703702U1 (en) * | 1987-03-12 | 1987-07-23 | Hötger jun., Peter, 4830 Gütersloh | Sound insulation element for installation on sound-permeable building parts |
| DE9006429U1 (en) * | 1990-06-07 | 1990-08-09 | Welter, geb. Freyaldenhoven, Martha, 5000 Köln | Soundproof door |
-
1991
- 1991-07-01 FR FR9108501A patent/FR2678674A1/en active Pending
-
1992
- 1992-08-06 EP EP92440095A patent/EP0582015A1/en not_active Withdrawn
- 1992-08-11 CA CA002075757A patent/CA2075757A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP0582015A1 (en) | 1994-02-09 |
| FR2678674A1 (en) | 1993-01-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 19950211 |