JPH063100B2 - Sound absorbing door - Google Patents

Description

The present invention relates to a sound absorbing door used in an office or the like.

[Prior Art] As a kind of door used in an office or the like, there is known a door formed by joining face plates made of sheet metal to both sides of a surrounding frame.

[Problems to be Solved by the Invention] However, since the face plate of this type of door is formed of a flat metal surface, it has a property of reflecting sound well on the surface. For this reason, there is a problem in that a voice or a sound generated from a so-called OA device is not easily attenuated, which hinders the quietness of an office or the like and promotes noise.

Further, in the door having such a structure, a so-called peking phenomenon or a propeller phenomenon is likely to occur on the face plate. That is, when the central portion of the face plate extends beyond the peripheral portion, the central portion becomes pestle in the thickness direction, and conversely, when the peripheral edge extends beyond the central portion, the entire face plate twists like a propeller. Therefore, there is a problem in that it is difficult to make the surface of the face plate look nice and accurate.

The present invention solves all of these problems at once, is easy to manufacture, has no risk of damaging clothes or the like of people passing by, and is capable of smooth cleaning and opening / closing. An object of the present invention is to provide a sound absorbing door that can effectively prevent the sound absorbing material inside from sliding down due to the impact repeatedly applied for each operation without reducing the sound absorbing effect.

[Means for Solving Problems] The present invention adopts the following configurations in order to achieve the above objects.

That is, the sound-absorbing door according to the present invention is one in which face plates whose longitudinal cross sections are symmetrical are joined to both sides of the peripheral edge, and the peripheral edge portion of each face plate is formed into a flat shape, and at least each of the face plates is formed. In the inner portion excluding the peripheral edge portion, a plurality of bulging portions in which upwardly extending cuts that extend in a substantially horizontal direction are projected to the inner surface side of the face plate, and vent holes are formed between the plurality of flat surface portions that are flush with the peripheral edge portion. The three-dimensional louver formed by opening each of the louvers is integrally formed, and the sound-absorbing material with the cloth attached to the surface is pressed between the double-sided plates with the surface pressed against the tip edge of the upward cut of each louver. It is characterized by being held.

[Operation] With such a structure, when sound is emitted in front of the face plate, the sound is propagated from the ventilation holes of the louver formed in the face plate to the inside of the face plate. It is absorbed by the sound absorbing material arranged in. Therefore, even if the face plate is present facing a space such as an office, it is possible to prevent the sound from being repeatedly reflected on the metal surface, and to reduce the noise level in the room.

In particular, this one has a substantially horizontal upward cut of the louver projecting to the inner surface side of the face plate, and since the cloth material of the sound absorbing material is caught at the tip of the upward cut, a relatively large impact acts on each opening and closing operation. It is possible to prevent the sound absorbing material from sliding down even if it is housed in the door, without adhering the sound absorbing material to the face plate. That is, when the sound absorbing material is sandwiched by the two face plates whose longitudinal cross sections are symmetrical, the sound absorbing material is constricted by the tip edge of the upward cut portion at the same height portion on both surfaces thereof and becomes constricted. Therefore, the sound absorbing material is
The constricted and reduced thickness portion and the enlarging and thickened portion are alternately continuous, which makes it difficult to slide downward. Therefore, the surface of the sound absorbing material is not hardened and deteriorated by the adhesive, and most of the sound absorbing material does not adhere to the face plate and the sound absorbing effect is not diminished.

Further, since the face plate is an integral part of this product, the number of parts can be significantly reduced compared to the case where the peripheral portion and the louver are composed of separate parts, and the man-hour required for production can be significantly reduced. it can. Moreover, the face plate has its peripheral portion flush with the flat part of the louver, and the bulging part of the louver is projected to the inner surface side of the face plate. Can be not smooth. Moreover, since the ventilation hole of the louver is formed between the upward cut of the bulging portion that protrudes inward and the downward cut of the flat surface, the cut even if the face plate is integrally formed by pressing or the like. Does not turn to the outside. Therefore, even if clothes or the like of a person passing by opening the door are brought into sliding contact with the surface of the face plate, the clothes or the like will not be caught on the face plate and damaged. Further, with such a structure, even when the surface dirt of the face plate is wiped off with a cloth or the like, the cloth or the like is not caught and the cleaning operation can be smoothly and quickly performed. Further, if the louver is integrally formed on the face plate as described above, the above-mentioned peco phenomenon and propeller phenomenon can be alleviated. That is, if a three-dimensional louver is formed on the face plate, the rigidity of the face plate increases,
The sticking in the thickness direction is effectively suppressed. Further, since the difference in elongation between the central portion and the peripheral portion of the face plate is absorbed by the opening portion of the louver, the propeller phenomenon is alleviated.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

A door frame 4 is provided on a partition wall 3 provided upright between the floor 1 and the ceiling 2, and a sound absorbing door 5 according to the present invention is openably and closably arranged inside the door frame 4.

The sound absorbing door 5 is formed by joining face plates 8 having louvers 7 to both sides of a surrounding frame 6 and sandwiching a sound absorbing material 9 between the face plates 8.

The surrounding frame 6 includes a structural member 61 having a U-shaped cross section and the opening 6
It is a frame-shaped joint with the 2 side facing inward, and its both sides 6
3 has a flat vertical surface.

The face plate 8 is made of sheet metal having bent portions 81 at upper and lower edges, and the bent portions 81 are adhered to the upper and lower horizontal end surfaces 64 of the surrounding frame 6, and the peripheral edge portion 82 is formed at the peripheral frame 6.
Is adhered to both sides 63 of the. The louver 7 is integrally formed by press working on the inner portion 83 of the face plate 8 excluding the peripheral portion 81. The louver 7 is a three-dimensional one having a horizontally extending upward cut 71 protruding toward the inner surface 84 side of the face plate 8. The louver 7 has an inward bulging portion 72 and a flat surface portion 73 flush with the peripheral edge portion 82. Vent holes 74 facing downward are opened in multiple stages. The double-sided plate 8 has a symmetrical vertical cross section, as shown in FIG.
The upward cuts 71 of the double-sided plate 8 are present at the same height.

The sound absorbing material 9 is mainly composed of glass wool, rock wool or the like formed in a thick sheet shape, and a cloth material such as a gauze cloth (coarse plain woven cloth) 91 is attached to the surface of the sound absorbing material 9 by partial adhesion or sewing. I am setting it up. The thickness W of the sound absorbing material 9 is set to be slightly larger than the distance L between the leading edge 71a of the upward cut 71 of the louver 7 in the double-sided plate 8. Therefore, the sound absorbing material 9 is sandwiched between the double-sided plates 8 with its surface pressed against the upward cut 71 of each louver 7. However, the sound absorbing material 9 wrapped in the cheesecloth 91 and the face plates 8 are not bonded.

Reference numeral 51 is a hinge for attaching the sound absorbing door 5 to the door frame 4, and reference numeral 52 is a handle.

With such a structure, when a sound is emitted in front of the face plate 8, the sound is propagated from the ventilation hole 74 of the louver 7 formed in the face plate 8 to the inside of the face plate 8. , Is absorbed by the sound absorbing material 9 arranged in that portion and converted into heat energy. Therefore, even if the face plate 8 is present facing a space such as an office, it is possible to prevent the sound from being repeatedly reflected on the metal surface, and to effectively reduce the noise level in the room effectively. You can

Moreover, with such a structure, the leading edge 71a of each upward cut 71 of the louver 7 protruding toward the inner surface 84 side of the face plate 8.
Then, the gauze cloth 91 attached to the surface of the sound absorbing material 9 is caught.
Therefore, although the face plate 8 and the sound absorbing material 9 are not adhered by an adhesive or the like, the sound absorbing material 9 does not slide downward. That is, when the sound absorbing material 9 is sandwiched by the two face plates 8 whose longitudinal cross sections are symmetrical, the same height portions on both surfaces of the sound absorbing material 9 are pressed against the upward cut 71 and are constricted. Therefore, in the sound absorbing material 9, a portion where the thickness is reduced and the thickness is reduced and a portion where the thickness is increased and the thickness is increased are alternately continuous, and it is difficult to slide downward.
If the sound absorbing material is adhered to the face plate using an adhesive, the surface of the sound absorbing material is hardened or deteriorated to make it difficult to obtain a sufficient sound absorbing effect. However, as described above, the sound absorbing material 9 is adhered to the face plate 8. If it is not necessary, such an inconvenience is not caused, and not only the assembling work can be simplified, but also the sound absorbing performance can be improved, which is an excellent effect. Since the louver 7 has a three-dimensional structure, a space S communicating with the outside through the ventilation hole 74 is formed above the upward cut 71, and the space S is restrained by the adhesive or the like. The sound-absorbing material 9 which is not yet exposed. Therefore, also from this point, high sound absorbing performance can be expected.

Further, since the face plate 8 is an integrated product, the number of parts can be far reduced as compared with the case where the peripheral portion 82 and the louver 7 are formed by separate parts, and the number of steps required for production is greatly reduced. Can be made. Moreover, the face plate 8 has its peripheral portion 82 and the flat surface portion 73 of the louver 7 flush with each other, and the bulging portion 72 of the louver 7 is projected to the inner surface side of the face plate 8. The surface of can be made smooth without protrusions or ridges. Moreover, since the ventilation hole 74 of the louver 7 is formed between the upward cut 71 of the bulging portion 72 protruding inward and the downward cut 75 of the flat portion 73, the face plate 8 is formed by pressing or the like.
Even if it is integrally molded, the cut end 75 does not face outward. Therefore, even if clothes or the like of a person passing by opening the door are brought into sliding contact with the surface of the face plate 8, the clothes or the like will not be caught on the face plate 8 and damaged. Further, with such a structure, even when the surface dirt of the face plate 8 is wiped off by a cloth or the like, the cloth or the like is not caught and the cleaning operation can be smoothly and quickly performed. Further, if the louver 7 is integrally formed on the face plate 8 as described above, the louver 7 also acts as a rib, and the rigidity of the face plate 8 is improved and it is effective that a peking phenomenon occurs. Can be prevented. Further, when the louver 7 is formed, the materials are separated from each other at the vent hole 74 portion of the louver 7,
Even if there is a difference in the elongation of the material between the peripheral edge portion 82 of the face plate 8 and the inner portion 83 thereof, the difference in the elongation is caused by the ventilation hole 7
Absorbed by the presence of 4. Therefore, the problem that the face plate 8 is deformed like a propeller can be eliminated.

The shape of the louver may be as shown in FIG. That is, the louver 107 further bends the upper end portion 172a of the inwardly bulged portion 172 inward,
The leading edge 171a of the upward cut 171 is sharpened. With this configuration, the cloth material 191 attached to the surface of the sound absorbing material 109 can be more easily caught by the upward cut 171. Therefore, it is possible to more reliably prevent the sound absorbing material 109 from sliding down. .

EFFECTS OF THE INVENTION Since the present invention has the above-mentioned configuration, by providing the louver on the double-sided plate facing the office or other space,
It is possible to effectively absorb the sound emitted in the space, and it is possible to effectively reduce the noise level in the space without difficulty. In particular, the sound absorbing material is held between the face plates so that it cannot slide down without using an adhesive, which simplifies the production and maximizes the performance of the sound absorbing material. A high sound absorbing effect can be obtained.

Further, since the louver is integrally formed on the face plate, the number of parts can be reduced and the number of manufacturing steps can be significantly reduced. Moreover, since the projections and ridges do not project on the surface of the face plate and the cuts of the face plate material do not exist facing outward, it is possible that people or clothes running on the face plate will come into sliding contact. No matter what happens, clothes will not get caught on the face plate and get scratched. Therefore, it is suitable as a door through which a person passes in close proximity. Further, with such a structure, even when the surface dirt of the face plate is wiped off with a cloth or the like, the cloth or the like is not caught, and the cleaning operation can be performed smoothly and quickly. Since there are many opportunities for humans to touch the surface of a door,
It is required to maintain a clean state, and it is also a great effect that the efficiency of cleaning work can be measured.

Further, in the present invention, the upward cut protruding to the inner surface side of the face plate is made substantially horizontal, and the upward cuts of the double-sided plate are located at the same height, and the cloth material is applied to the surface at the tip edges of the upward cut. Since the sound absorbing material attached thereto is sandwiched and held, it is possible to effectively prevent the sound absorbing material from slipping off without using an adhesive that reduces the sound absorbing effect. Therefore, even in a door where a shock is likely to be applied each time it is opened and closed, the position of the sound absorbing material does not shift, and a high sound absorbing effect can be exerted for a long period of time.

Further, by providing the louver on the face plate, it is possible to increase the rigidity of the face plate, reduce the adverse effect due to the difference in the elongation rate of the materials, and provide a sound-absorbing door that does not deform and has a good appearance. .

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, FIG. 1 is a front view, FIG. 2 is an enlarged sectional view taken along the line AA in FIG. 1, and FIG. 3 is FIG. FIG. 4 is an enlarged sectional view taken along the line BB, and FIG. 4 is an enlarged sectional view showing a portion C in FIG. FIG. 5 is an enlarged sectional view corresponding to FIG. 4 showing another embodiment of the present invention. 5 ... Sound absorbing door, 7 ... Louver 8 ... Face plate, 9 ... Sound absorbing material 71 ... Upward cut, 72 ... Swelling part 73 ... Flat part, 74 ... Vent hole 75 ... Downward cut, 82 ... Peripheral part 83 ... Inner part, 91 ... cloth material (brass gauze) 107 ... louver, 109 ... sound absorbing material 171 ... upward cut, 191 ... cloth material

Claims (1)

[Claims] 1. A door in which face plates having a symmetrical longitudinal section are joined to both sides of a peripheral edge, and the peripheral portions of each face plate are formed into a flat shape, and at least the inner peripheral portions of the respective face plates are excluded. A plurality of bulging portions having upwardly extending cuts that extend in a substantially horizontal direction projecting toward the inner surface of the face plate, and vent holes are respectively formed between the plurality of flat portions that are flush with the peripheral edge portion. A three-dimensional louver is integrally formed, and a sound absorbing material with a cloth material attached to the surface is sandwiched between the double-sided plates while the surface is pressed against the tip edge of the upward cut of each louver. Characteristic sound absorbing door.