JP7614654B2 - Soundproof doors and soundproof door devices - Google Patents

Description

The present invention relates to soundproof doors and soundproof door devices.

When sound is generated indoors, that sound can leak outside through the door installed in the room. Therefore, various soundproof doors have been provided to prevent sound generated indoors from leaking outside.

For example, the soundproof door shown in Patent Document 1 comprises a rectangular opening frame, a door panel that is connected to a hinge member attached to the opening frame and is provided inside the opening frame, and a packing that fits tightly against the peripheral edge of the door panel when closed. This soundproof door prevents sound from leaking outside the room through the gap between the door panel and the packing by fitting the peripheral edge of the door panel to the packing when closed.

JP 2001-107662 A

However, the above-mentioned soundproof doors do not take into consideration the transmission of sound to the outside due to the vibration of the interior door panel. In other words, with the above-mentioned soundproof doors, when sound is transmitted to the interior door panel and the interior door panel vibrates, a pressure change occurs in the internal space between the interior door panel and the exterior door panel, and the pressure in the internal space increases. Then, when the increased pressure is transmitted to the exterior door panel and the exterior door panel vibrates, the sound is transmitted to the outside. As a result, the above-mentioned soundproof doors are unable to provide sufficient soundproofing performance to prevent sound from being transmitted to the outside.

Therefore, the present invention was made to solve the above problems, and its main objective is to prevent sound from being transmitted to the outside of the room due to vibration of the door panel on the inside of the room.

That is, the soundproof door according to the present invention comprises a rectangular support frame, a rectangular main plate covering one side of the opening of the support frame and a side wall surrounding the outer peripheral surface of the support frame, an inner panel supported by the support frame, a rectangular main plate covering the other side of the opening of the support frame and a side wall surrounding the outer peripheral surface of the support frame, and an outer panel supported by the support frame, and an elastic member attached to the outer peripheral surface of the support frame and provided in contact with the inner surface of the side wall of the inner panel and the inner surface of the side wall of the outer panel, the side wall of the inner panel and the side wall of the outer panel are arranged apart from each other, and the elastic member has a plurality of communication passages formed therein that communicate the internal space sandwiched between the inner panel and the outer panel and the external space of the inner panel and the outer panel.

In such a soundproof door, the side wall of the inner panel and the side wall of the outer panel are disposed apart from each other, so that vibrations transmitted to the inner panel are not directly transmitted to the side wall of the outer panel via the side wall. In addition, the elastic member is provided in contact with the inner surface of the side wall, so that the vibrations transmitted to the inner panel are absorbed by the elastic member and are not easily transmitted from the side wall of the inner panel to the side wall of the outer panel.
In addition, since the elastic member has a plurality of communication passages that connect the internal space and the external space, when the pressure in the internal space changes, the air flows in and out of the internal space through the communication passages. This reduces the vibration of the air in the internal space caused by the vibration transmitted to the internal panel. As a result, the vibration transmitted to the internal panel is less likely to propagate to the external panel through the air in the internal space.
Here, low-frequency sounds have the tendency to propagate from the inner panel through the internal space to the outer panel. In the present invention, the air in and out of the internal space is reduced in vibration by the air flowing in and out through the communication passage, and therefore the present invention has excellent soundproofing performance against low-frequency sounds.
On the other hand, since high-frequency sound is reflected and attenuated by the inner surface of the communicating passage as it propagates through the air inside the communicating passage, the present invention has excellent soundproofing performance against high-frequency sound.

It is desirable that the soundproof door has a contact surface that contacts the inner surface of the side wall portion, and has a plurality of grooves extending from one side of the opening of the support frame to the other side and formed in the contact surface, and that the plurality of grooves and the inner surface of the side wall portion form a plurality of the communication passages.

With this configuration, multiple grooves extending from one side of the opening of the support frame to the other side are formed on the contact surface that contacts the inner surface of the side wall, so that a communication passage opening is formed between the side wall of the inner panel and the side wall of the outer panel. This allows the opening of the communication passage to be made larger, making it easier for air to flow in and out through the communication passage.

It is preferable that the elastic member is attached around the entire circumference of the outer peripheral surface of the support frame, and that the grooves are formed at predetermined intervals around the entire circumference of the elastic member.

With this configuration, the communication passage is provided around the entire outer peripheral surface of the elastic member. As a result, there are more flow paths for air to flow in and out, further reducing the vibration of the air in the interior space caused by vibrations transmitted to the inner panel.

The groove has a rectangular cross section perpendicular to the direction in which the groove extends, the base of the cross section is preferably 1 mm or more and 3 mm or less, and the side perpendicular to the base of the cross section is preferably 1 mm or more and 1.5 mm or less.

With this configuration, the cross section perpendicular to the direction in which the groove extends is rectangular, so that the area in contact with the contact surface of the elastic member and the inner surface of the side wall can be made smaller than when the cross section is, for example, circular or honeycomb shaped. Also, when the sides constituting the cross section of the groove are within the above-mentioned range, the number of times that the sound is reflected by the groove is particularly large for sounds in the high frequency range of 2500 Hz to 10000 Hz, so that the sound in the high frequency range can be attenuated more.
Here, the cross section of the groove is set to a maximum of 3 mm at the bottom and 1.5 mm at the side perpendicular to the bottom. This is because if the cross section of the groove is large, the number of times the sound is reflected by the groove decreases, making it difficult to attenuate the sound. Also, if the cross section of the groove is large, the contact area between the side wall of the inner panel and the side wall of the outer panel becomes too small, weakening the force of the support frame to support the inner panel and the outer panel.
On the other hand, the cross section of the groove is set to a minimum of 1 mm at the base and 1 mm at the side perpendicular to the base. This is because if the cross section of the groove becomes small, it becomes difficult for sound to pass through the communicating passage due to the viscosity of the air, and pressure cannot be released through the communicating passage.

It is preferable that the angle between the direction in which the groove extends and the main plate portion of the inner panel is between 45 degrees and 90 degrees. If the angle between the direction in which the groove extends and the main plate portion of the inner panel is less than 45 degrees, it becomes difficult for sound to enter the communication passage, and the sound is returned toward the inner panel, making it impossible to achieve the desired sound deadening performance.

A soundproof door device that is attached to a soundproof room to prevent sound from traveling to the outside further includes the soundproof door, a rectangular door frame that surrounds the inner panel and the outer panel in a closed state, a rectangular elastic packing member that is attached to the door frame and that is in close contact with the periphery of the main plate portion of the inner panel in a closed state, and a hinge member that rotatably hinges the inner panel and the outer panel to the door frame, and the hinge member includes a first attachment member that is attached to the side wall portion of the inner panel and the side wall portion of the outer panel in the vertical direction, and a second attachment member that is attached to the door frame in the vertical direction and hinged to the first attachment member.

With such a soundproof door, the first and second mounting members that make up the hinge member are attached to the door frame and the inner and outer panels in the vertical direction, respectively, so the weight of the inner and outer panels can be evenly distributed in the vertical direction of the first and second mounting members. As a result, the durability of the door frame and hinge members can be improved.

The soundproof door device may further include the soundproof door and a rectangular second door that is positioned closer to the soundproof room than the soundproof door.

With this type of soundproof door device, the second door is positioned closer to the soundproof room than the soundproof door, so sound generated within the soundproof room is first absorbed by the second door. As a result, sound transmitted to the inner panel of the soundproof door can be reduced, suppressing vibration of the outer panel and providing high soundproofing performance. In addition, by setting the frequency range of sound absorbed by the second door to a different frequency range from that of the soundproof door, the frequency range absorbed by the soundproof door device can be expanded.

This invention, configured in this way, can prevent sound from being transmitted to the outside of the room due to vibration of the door panel on the inside of the room.

FIG. 1 is a perspective view of a soundproof door device according to an embodiment of the present invention. FIG. 2 is a perspective view of the soundproof door of the embodiment. FIG. 2 is an exploded perspective view of the soundproof door according to the embodiment. FIG. 2 is an enlarged perspective view of the soundproof door according to the embodiment. FIG. 2 is a partially enlarged view of a cross section perpendicular to a main plate portion of the soundproof door according to the embodiment. FIG. 2 is a partially enlarged view of a cross section parallel to a main plate portion of the soundproof door of the embodiment. FIG. 11 is a cross-sectional view of a soundproof door device according to another embodiment.

Below, an embodiment of the soundproof door device according to the present invention will be described with reference to the drawings. Note that in all of the drawings shown below, some parts may be omitted or exaggerated as appropriate for ease of understanding. Identical components will be given the same reference numerals and descriptions thereof will be omitted as appropriate.

<Basic configuration of soundproof door device 100>
The soundproof door device 100 of this embodiment is formed in a soundproof room (not shown) and prevents sound generated inside the soundproof room from transmitting to the outside of the soundproof room.

Specifically, as shown in FIG. 1, the soundproof door device 100 includes a soundproof door 10, a door frame 20 that surrounds the soundproof door 10 when the soundproof door 10 is closed, an elastic packing member 30 that is attached to the door frame 20, and a hinge member 40 that hinges the soundproof door 10 to the door frame 20 so that the soundproof door 10 can rotate.

The soundproof door 10 has a rectangular inner panel 12 and an outer panel 13, and the inner panel 12 is positioned closer to the soundproof room than the outer panel 13. The detailed structure of the soundproof door 10 will be described later.

The door frame 20 surrounds the soundproof door 10 when the soundproof door 10 is closed. Specifically, as shown in FIG. 1, the door frame 20 includes a frame member 21 that surrounds the sides of the inner panel 12 and the outer panel 13 when the door is closed, and a packing attachment member 22 to which the elastic packing member 30 is attached. The packing attachment member 22 has a rectangular frame shape and is disposed perpendicular to the frame member 21.

The elastic packing member 30 is in close contact with the inner panel 12 when the soundproof door 10 is closed. Specifically, the elastic packing member 30 is attached to the packing mounting member 22, and forms a rectangular frame shape that fits along the peripheral edge of the inner panel 12 when the soundproof door 10 is closed.

The hinge member 40 rotatably connects the soundproof door 10 to the door frame 20, allowing the soundproof door 10 to be opened and closed. Specifically, as shown in FIG. 1, the hinge member 40 includes a first mounting member 41 provided across the vertical direction of the side surfaces of the inner panel 12 and the outer panel 13, a second mounting member 42 attached across the vertical direction of the frame member 21 of the door frame 20 and hinged to the first mounting member 41, and a hinge connecting member 43 that hinges the first mounting member 41 and the second mounting member 42.

<Specific configuration of soundproof door 10>
Next, a specific configuration of the soundproof door 10 will be described with reference to FIGS.

As shown in FIG. 2, the soundproof door 10 includes a rectangular support frame 11, an inner panel 12 and an outer panel 13 supported by the support frame 11, and an elastic member 14 attached to the support frame 11.

The support frame 11 supports the inner panel 12 and the outer panel 13. Specifically, as shown in Figures 2 and 3, the support frame 11 has a rectangular frame shape, and an approximately rectangular opening 111 is formed on the inside of the frame. The support frame 11 is made of a metal material, such as stainless steel.

The inner panel 12 has a rectangular flat main plate portion 121 that covers one side of the opening 111 of the support frame 11, and a side wall portion 122 that surrounds the outer peripheral surface 11a of the support frame 11. The material of the inner panel 12 is a metal material such as stainless steel. The main plate portion 121 has a rectangular shape that is larger than the opening 111 of the support frame 11, and is positioned away from the support frame 11. Specifically, the inner surface 121a of the main plate portion 121 is positioned away from the opening 111 of the support frame 11, as shown in FIG. 5, and a space is formed between the inner surface 121a and the opening 111.

The side wall portion 122 of the inner panel 12 is formed along the entire peripheral edge of the main plate portion 121 and surrounds the outer peripheral surface 11a of the support frame 11. Specifically, as shown in Figures 2 to 5, the side wall portion 122 has an inner surface 122a that faces the outer peripheral surface 11a of the support frame 11, and the inner surface 122a is formed parallel to the outer peripheral surface 11a along the entire circumference of the outer peripheral surface 11a. Note that the first mounting member 41 is attached along the vertical direction of one of the side wall portions 122 formed along the vertical direction of the main plate portion 121.

The outer panel 13 has a rectangular flat main plate portion 131 that covers the other side of the opening 111 of the support frame 11, and a side wall portion 132 that surrounds the outer peripheral surface 11a of the support frame 11. The material of the outer panel 13 is a metal material such as stainless steel. The main plate portion 131 is rectangular and larger than the opening 111 of the support frame 11, and is disposed on the opposite side of the support frame 11 to the main plate portion 121 of the inner panel 12. As shown in FIG. 5, the inner surface 131a of the main plate portion 131 is disposed away from the opening 111 of the support frame 11, and a space is formed between the inner surface 131a and the opening 111.

The side wall portion 132 of the outer panel 13 is formed along the entire peripheral portion of the main plate portion 131 and surrounds the outer peripheral surface 11a of the support frame 11. Specifically, as shown in Figures 2 to 5, the side wall portion 132 has an inner surface 132a that faces the outer peripheral surface 11a of the support frame 11, and the inner surface 132a is formed parallel to the outer peripheral surface 11a along the entire circumference of the outer peripheral surface 11a. Note that the first mounting member 41 is attached along the vertical direction of one of the side wall portions 132 formed along the vertical direction of the main plate portion 131.

The elastic member 14 is attached to the outer peripheral surface 11a of the support frame 11 and is provided in contact with the inner surface 122a of the side wall portion 122 of the inner panel 12 and the inner surface 132a of the side wall portion 132 of the outer panel 13. Specifically, as shown in Figures 3 to 5, the elastic member 14 has a rectangular cross section and has a mounting surface 14a attached to the outer peripheral surface 11a of the support frame 11 and a contact surface 14b in contact with the inner surfaces 122a, 132a of the side wall portions 122, 132. In this embodiment, the mounting surface 14a is provided around the entire outer peripheral surface 11a of the support frame 11 as shown in Figure 3. Also, the mounting surface 14a and the contact surface 14b are formed parallel to each other as shown in Figure 5. In this embodiment, the elastic member 14 is, for example, a vibration-proof rubber, but any elastic material may be used.

Thus, the side wall portion 122 of the inner panel 12 and the side wall portion 132 of the outer panel 13 are disposed apart from each other. Specifically, as shown in Figures 2, 4, and 5, the end face 122b of the side wall portion 122 of the inner panel 12 and the end face 132b of the side wall portion 132 of the outer panel 13 are disposed in parallel and separated by a predetermined distance. In this embodiment, a space is formed between the end face 122b of the side wall portion 122 of the inner panel 12 and the end face 132b of the side wall portion 132 of the outer panel 13.

In addition, the elastic member 14 is formed with a plurality of communication passages 141 that connect the internal space sandwiched between the inner panel 12 and the outer panel 13 to the external space of the inner panel 12 and the outer panel 13. As shown in Figures 4 and 5, the communication passages 141 connect the internal space of the inner panel 12 and the outer panel 13 to the space between the end faces 122b, 132b of the side wall portions 122, 132.

Specifically, the elastic member 14 has a plurality of grooves 142 formed therein, which extend from one side of the opening 111 of the support frame 11 to the other side. Specifically, as shown in Figs. 4 and 5, the plurality of grooves 142 are formed linearly on the contact surface 14b from the inner panel 12 side of the opening 111 to the outer panel 13 side. As a result, the space surrounded by the plurality of grooves 142 and the inner surfaces 122a, 132a of the side wall portions 122, 132 constitute a plurality of communication passages 141. In addition, openings of the communication passages 141 are formed between the end faces 122b and 132b.

The multiple grooves 142 are formed at a predetermined interval around the entire circumference of the elastic member 14. Specifically, as shown in Figures 3 to 5, the multiple grooves 142 are formed at a predetermined interval around the entire circumference of the contact surface 14b, and in this embodiment, the interval between adjacent multiple grooves 142 is 2 mm.

As shown in FIG. 6, the groove 142 has a rectangular cross section S perpendicular to the direction in which the groove 142 extends. Of the sides forming the rectangular shape, it is preferable that the base S1 of the cross section S is 1 mm or more and 3 mm or less, and the side S2 perpendicular to the base S1 is 1 mm or more and 1.5 mm or less. In this embodiment, the base S1 is 3 mm, and the side S2 perpendicular to the base S1 is 1.5 mm.

Furthermore, the grooves 142 extend from the main plate portion 121 of the inner panel 12 toward the main plate portion 131 of the outer panel 13. It is preferable that the angle between the direction in which the multiple grooves 142 extend and the main plate portion 121 of the inner panel is 45 degrees or more and 90 degrees or less, and in this embodiment, the angle is 90 degrees, as shown in FIG. 5.

<Soundproofing effect of soundproof door 10>
Next, the soundproofing effect of the soundproof door 10 in this embodiment will be described.

When the soundproof door 10 is closed and sound is generated inside the soundproof room, the sound reaches the main plate portion 121 of the inner panel 12. When the sound vibrates the main plate portion 121 of the inner panel 12, the air in the internal space vibrates. In addition, the vibration of the main plate portion 121 of the inner panel 12 is transmitted to the side wall portion 122 of the inner panel 12.

Because the side walls 122, 132 are separated from each other, vibrations transmitted to the inner panel 12 are not transmitted directly to the side walls 132 of the outer panel 13 via the side walls 122. Furthermore, because the elastic member 14 is provided in contact with the inner surfaces 122a, 132a of the side walls 122, 132, vibrations transmitted to the inner panel 12 are absorbed by the elastic member 14.

In addition, the elastic member 14 has multiple communication passages 141 that connect the internal space to the external space, so that when the pressure in the internal space changes, air flows in and out of the internal space through the communication passages 141. This reduces the vibration of the air in the internal space caused by the vibration transmitted to the inner panel 12.

<Effects of this embodiment>
According to the soundproof door 10 of this embodiment, the side wall portion 122 of the inner panel 12 and the side wall portion 132 of the outer panel 13 are disposed apart from each other, so that vibrations transmitted to the inner panel 12 are not directly transmitted to the side wall portion 132 of the outer panel 13. In addition, since the elastic member 14 is provided in contact with the side wall portions 122, 132, vibrations transmitted to the inner panel 12 are absorbed by the elastic member 14 and are unlikely to propagate from the side wall portion 122 of the inner panel 12 to the side wall portion 132 of the outer panel 13.
In addition, since the elastic member 14 has a plurality of communication passages 141 that communicate the internal space with the external space, when the pressure in the internal space changes, air flows in and out of the internal space through the communication passages 141. This reduces the vibration of the air in the internal space caused by the vibration transmitted to the inner panel 12. As a result, the vibration transmitted to the inner panel 12 is less likely to propagate to the outer panel 13 through the air in the internal space.
Here, low-frequency sounds have a tendency to propagate from the inner panel through the internal space to the outer panel. The soundproof door 10 of this embodiment has excellent soundproofing performance against low-frequency sounds because the air vibration in the internal space is reduced by the air flowing in and out through the communication passage 141. In particular, it has high soundproofing performance against low-frequency sounds such as those around 125 Hz.
On the other hand, since sounds in the high frequency range are reflected and attenuated on the inner surface of the communicating passage 141 as they propagate through the air inside the communicating passage 141, the soundproof door 10 of this embodiment has excellent soundproofing performance against sounds in the high frequency range.

In addition, a plurality of grooves 142 extending from one side of the opening 111 of the support frame 11 to the other side are formed on the contact surface 14b that contacts the inner surfaces 122a, 132a of the side walls 122, 132, so that an opening of the communication passage 141 is formed between the side wall 122 of the inner panel 12 and the side wall 132 of the outer panel 13. Therefore, the opening of the communication passage 141 can be made larger, making it easier for air to flow in and out through the communication passage 141.

In addition, the communication passage 141 is provided around the entire circumference of the contact surface 14b of the elastic member 14. As a result, the number of flow paths through which air can flow in and out is increased, further reducing the vibration of the air in the internal space caused by the vibration transmitted to the inner panel 12.

Furthermore, the soundproof door 10 has a first mounting member 41 and a second mounting member 42 that constitute the hinge member 40, which are attached to the door frame 20 and the inner panel 12 and the outer panel 13 in the vertical direction, respectively, so that the weight of the soundproof door 10 can be uniformly distributed in the vertical direction of the first mounting member 41 and the second mounting member 42. As a result, the durability of the door frame 20 and the hinge member 40 can be improved.

<Other Modified Embodiments>
The present invention is not limited to the above-described embodiment.

In this embodiment, the elastic member 14 has a contact surface 14b along the inner surfaces 122a, 132a of the sidewalls 122, 132, but the surface where the contact surface 14b comes into contact with the sidewalls 122, 132 is not limited to this. For example, the contact surface 14b may come into contact with the inner surfaces 122a, 132a and end surfaces 122b, 132b of the sidewalls 122, 132. The contact surface 14b may also come into contact with a part of the inner surfaces 122a, 132a of the sidewalls 122, 132.

In this embodiment, the groove 142 is formed along the inner surfaces 122a, 132a of the sidewalls 122, 132, but is not limited to this. For example, if the contact surface 14b of the elastic member 14 is in contact with both the inner surfaces 122a, 132a and the end surfaces 122b, 132b of the sidewalls, the groove 142 may be formed along the contact surface.

In this embodiment, the elastic member 14 is provided around the entire circumference of the outer peripheral surface 11a of the support frame 11, but it may be provided on only a part of the outer peripheral surface 11a. In addition, the multiple grooves 142 may be provided around the entire circumference of the elastic member 14, or may be provided on only a part of the circumference.

In this embodiment, the cross section perpendicular to the extension direction of the groove 142 is rectangular, but the cross section is not limited to a rectangular shape. For example, the cross section may be circular or honeycomb.

In this embodiment, the support frame 11 has an opening 111, but the opening 111 may be provided with a sound-absorbing member that absorbs sound transmitted from the inner panel 12. In this case, sound from the inner surface 121a of the inner panel 12 is absorbed by the sound-absorbing member, so that vibrations transmitted to the outer panel 13 can be further prevented.

The soundproof door device 100 may further include a rectangular second door 51 arranged closer to the soundproof room than the soundproof door 10, as shown in FIG. 7. In this case, the soundproof door device 100 may further include a second door frame 52, a second elastic packing member 53, and a second hinge member 54, as in the soundproof door device 100 of this embodiment. The second door 51 is made of a material with high soundproofing performance, such as glass wool. As shown in FIG. 7, doorknobs D are attached to both side surfaces of the second door 51. The second door frame 52 may be formed integrally with the door frame 20 of the soundproof door device 100.

In this case, sound generated within the soundproof room is first transmitted to the second door 51. As a result, the sound transmitted to the inner panel 12 of the soundproof door 10 is reduced, improving the soundproofing performance of the soundproof door device 100. Furthermore, if the second door 51 is made of a material that absorbs sounds in the low frequency range more, the soundproof door 10 will absorb sounds in particular in the high frequency range, and therefore can absorb sounds in different frequency ranges.

It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the invention.

100 ... soundproof door device 10 ... soundproof door 11 ... support frame 111 ... opening 11a ... outer peripheral surface 12 ... inner panel 121 ... main plate portion 122 ... side wall portion 122a ... inner surface 13 of side wall portion of inner panel ... outer panel 131 ... main plate portion 132 ... side wall portion 132a ... inner surface 14 of side wall portion of outer panel ... elastic member 141 ... communication passage 14b ... contact surface 142 ... groove 20 ... door frame body 30 ... elastic packing member 40 ... hinge member 41 ... first mounting member 42 ... second mounting member 51 ... second door

Claims (7)

A rectangular support frame;
an inner panel having a rectangular main plate portion covering one of the openings of the support frame and a side wall portion surrounding an outer peripheral surface of the support frame and supported by the support frame;
an outer panel having a rectangular main plate portion covering the other opening of the support frame and a side wall portion surrounding an outer peripheral surface of the support frame and supported by the support frame;
an elastic member attached to the outer peripheral surface of the support frame and provided in contact with an inner surface of the side wall portion of the inner panel and an inner surface of the side wall portion of the outer panel,
The side wall portion of the inner panel and the side wall portion of the outer panel are spaced apart from each other,
A soundproof door, wherein the elastic member has a plurality of communication passages formed therein, the communication passages connecting an internal space sandwiched between the inner panel and the outer panel and an external space of the inner panel and the outer panel. the elastic member has a contact surface that contacts the inner surface of the side wall portion, and has a plurality of grooves that extend from one side of the opening of the support frame to the other side and are formed on the contact surface,
2. The soundproof door according to claim 1, wherein a plurality of said grooves and said inner surface of said side wall portion form a plurality of said communication passages. The elastic member is attached to the outer peripheral surface of the support frame over an entire circumference thereof,
3. The soundproof door according to claim 2, wherein the plurality of grooves are formed at predetermined intervals around the entire circumference of the elastic member. The groove has a rectangular cross section perpendicular to a direction in which the groove extends,
The base of the cross section is 1 mm or more and 3 mm or less,
3. The soundproof door according to claim 2, wherein a side perpendicular to a base of the cross section is 1 mm or more and 1.5 mm or less. The soundproof door according to claim 4, wherein the angle between the direction in which the groove extends and the main plate portion of the inner panel is between 45 degrees and 90 degrees. A soundproof door device that is installed in a soundproof room to prevent sound from being transmitted to the outside of the room,
A soundproof door according to any one of claims 1 to 5;
a door frame body having a rectangular frame shape that surrounds the inner panel and the outer panel in a closed state;
a rectangular frame-shaped elastic packing member attached to the door frame and in close contact with a peripheral edge of the main plate portion of the inner panel in a closed state;
a hinge member that rotatably hinges the inner panel and the outer panel to the door frame,
The hinge member is
a first mounting member that is attached to the side wall portion of the inner panel and the side wall portion of the outer panel in a vertical direction;
A soundproof door device comprising a second mounting member that is attached across the door frame in the vertical direction and is hingedly connected to the first mounting member. A soundproof door device that is installed in a soundproof room to prevent sound from being transmitted to the outside of the room,
A soundproof door according to any one of claims 1 to 5;
The soundproof door device further comprises a rectangular second door that is arranged closer to the soundproof room than the soundproof door.