JP2021113484A - Ventilation device and manufacturing method of ceiling - Google Patents

Abstract

To provide a ventilation device which does not decrease a sound insulation performance of a soundproof double ceiling, and a manufacturing method of the ceiling.SOLUTION: A ventilation device 1 provided through a first open hole 110 provided at a first ceiling plate 100 and a second open hole 210 provided at a second ceiling plate 200 arranged below the first ceiling plate comprises an air duct 10, and a ventilation member 20 connected with a tip of the air duct. The ventilation member 20 comprises: an attachment part 30 capable of being fitted to the second ceiling plate from downward; a fitting part 50 provided above the attachment part and fitted into the first open hole from below; and energization means 70 energizing the fitting part upward in the state that the attachment part is mounted to the second ceiling plate. The fitting part 50 has an outer peripheral surface 52 formed to be brought into close contact with a rim of the first open hole 110 over the whole periphery.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method of manufacturing a ventilation device and a ceiling.

Advanced soundproofing may be required between the upper and lower floors.

In this case, the ceiling boards are spaced vertically apart to form a double-layered ceiling to improve the sound insulation performance between the upper and lower floors (hereinafter, a double-structured structure for the purpose of soundproofing). The ceiling is called "soundproof double ceiling").

For example, Patent Document 1 describes the ceiling structure of a unit room. That is, as shown in FIG. 6 of Patent Document 1, the ceiling structure of the unit room described in Patent Document 1 includes two high and low ceiling plates (a1) and (a2) arranged at intervals above and below. It is provided with a ventilation device (c) provided on the ceiling (a1).

The ventilation device (c) is connected to a ventilation pipe penetrating the ceiling plate (a1) and a tip portion of the ventilation pipe attached to the ceiling plate (a2) so that gas can be discharged or introduced through the ventilation pipe. It is equipped with a ventilation member.

Jikkenhei 03-125150

When an attempt is to install a ventilation device on a ceiling having such a double structure, the middle part of the ventilation pipe once penetrates the upper ceiling plate and the lower ceiling plate, and the tip portion of the ventilation pipe is lower. It is pulled out below the ceiling board of.

The tip of the ventilation pipe, which is pulled out below the lower ceiling plate, is connected to the ventilation member and then pushed upward together with the ventilation member.

Then, the ventilation device is installed on the ceiling of the double structure in a state where the ventilation member is fixed to the lower ceiling plate and the ventilation pipe penetrates the upper ceiling plate.

When pushing up the ventilation pipe at the time of mounting in this way, the ventilation pipe needs to move upward with respect to the upper ceiling plate. Therefore, the opening area of the through hole formed in the upper ceiling plate for penetrating the ventilation pipe is set to be larger than the cross-sectional area of the ventilation pipe.

That is, in the state where the ventilation device is attached, a gap is formed between the upper ceiling plate and the ventilation pipe passing through the through hole.

Therefore, in the soundproof double ceiling, although the sound insulation performance between the upper floor and the lower floor is required, there is a problem that sound leakage occurs through the gap and the sound insulation performance due to the soundproof double ceiling is lowered. be.

An object of the present invention is to provide a ventilation device and a method for manufacturing a ceiling, which can suppress a decrease in sound insulation performance of a soundproof double ceiling.

The present invention has a first through hole provided in the first ceiling plate and a second through hole provided in a second ceiling plate arranged below the first ceiling plate at intervals. The ventilation device is provided so as to be able to discharge or introduce gas through a ventilation pipe having a portion arranged above the first ceiling plate and the ventilation pipe. The ventilation member is provided with a ventilation member connected to the tip end portion of the ventilation pipe, and the ventilation member is provided on a mounting portion that can be attached to the second ceiling plate from below and an upper portion of the mounting portion. It has a fitting portion that fits into the through hole of 1 from below, and an urging means that urges the fitting portion upward while the mounting portion is mounted on the second ceiling plate. The fitting portion provides a ventilation device having an outer peripheral surface formed so as to be in close contact with the edge of the first through hole over the entire circumference.

According to the ventilation device, the outer peripheral surface of the fitting portion is formed so as to be in close contact with the edge of the first through hole over the entire circumference. Therefore, it is possible to prevent a gap from being formed between the outer peripheral surface and the edge of the first through hole when the fitting portion is pushed up toward the first through hole. Further, since the urging means urges the fitting portion upward in a state where the mounting portion is attached to the second ceiling plate, it is possible to maintain the state without the gap. For this reason, sound leakage is suppressed through the first through hole that is maintained in a state where there is no gap between the fitting portion and the outer peripheral surface, and the sound insulation performance of the soundproof double ceiling is deteriorated. It can be suppressed.

It is preferable that the outer peripheral surface of the fitting portion of the ventilation device gradually shrinks in the radial direction from the lower side to the upper side.

According to the ventilation device, since the outer peripheral surface of the fitting portion is gradually reduced in the radial direction from the lower side to the upper side, a plurality of surfaces that intersect in the vertical direction are formed on the outer peripheral surface, and a plurality of surfaces are formed. Any one of the surfaces that intersect in the vertical direction can come into contact with the lower surface of the first ceiling plate in a planar manner. Therefore, sound leakage can be prevented more effectively than in the case where the outer peripheral surface contacts the first through hole in a point-like or linear manner to prevent sound leakage.

The ventilation device may have a tapered shape in which the outer peripheral surface of the fitting portion contracts in the radial direction from the lower side to the upper side.

According to the ventilation device, since the outer peripheral surface of the fitting portion has a tapered shape that contracts in the radial direction from the lower side to the upper side, the outer peripheral surface has a tapered shape by being urged upward by the urging means. The outer peripheral surface can be brought into close contact with the edge of the first through hole at a position where the contact drag force with the edge of the first through hole and the urging force by the urging means are balanced. As a result, it is possible to prevent sound from leaking through the first through hole, and even if the tolerance in the design of the shape of the first through hole and the shape of the fitting portion is increased, the said. Since the outer peripheral surface can be brought into close contact with the edge of the first through hole by the action of the urging force, the design accuracy of each of the shape of the first through hole and the shape of the fitting portion can be relaxed. can.

The ventilation device preferably has an elastic member whose urging means is provided between the fitting portion and the mounting portion.

According to the ventilation device, the fitting portion, the mounting portion, and the elastic member are separate members, and these can be individually designed according to their roles. Specifically, it is as follows. The elastic member of the urging means can be designed for the purpose of exerting an urging force for urging the fitting portion upward. On the other hand, the fitting portion can be designed by controlling the dimensions for fitting into the first through hole from below. The mounting portion can be designed so that it can be mounted on the second ceiling plate and the fitting portion is pushed up when it is pushed up. That is, since the design of each part can be individually managed, the design management becomes easy.

The ventilation device preferably has a fitting portion support tubular portion formed in a tubular shape so that the mounting portion slidably supports the fitting portion.

According to the ventilation device, when the fitting portion is pushed up toward the first through hole by pushing up the mounting portion, after the fitting portion is fitted into the first through hole, the fitting portion is fitted into the first through hole. The fitting portion support cylinder portion can be slid while supporting the fitting portion to bring the mounting portion into contact with the second ceiling plate.

In the ventilation device, the fitting portion may have elasticity and also serve as the urging means.

According to the ventilation device, the fitting portion can be urged upward by its own elasticity to maintain a state in which the outer peripheral surface is in close contact with the edge of the first through hole over the entire circumference. .. Further, since the fitting portion also serves as the urging means, the number of parts of the entire ventilation device can be reduced.

The present invention relates to a first ceiling plate provided with a first through hole and a second ceiling plate provided with a second through hole arranged below the first ceiling plate at intervals. A step of preparing a work-in-progress structure in which the ventilation member connected to the tip of the ventilation pipe is located below the second ceiling plate, which is a method for manufacturing a ceiling on which the ventilation device is installed. A step of pushing up the fitting portion by pushing up the mounting portion to bring the outer peripheral surface of the fitting portion into close contact with the edge of the first through hole, and the outer peripheral surface of the first through hole. Provided is a method for manufacturing a ceiling, which comprises a step of attaching the mounting portion to the second ceiling plate so that a state of being in close contact with the edge is maintained by the urging means.

According to the method for manufacturing the ceiling, the fitting portion is pushed up by pushing up the mounting portion to be fitted into the first through hole, and the mounting portion is mounted on the second ceiling plate. In, the fitting portion is urged upward by the urging means, and a state in which there is no gap between the outer peripheral surface of the fitting portion and the edge of the first through hole is maintained. It is possible to manufacture a soundproof double ceiling that suppresses sound leakage through the through hole 1 and suppresses deterioration of sound insulation performance.

Specifically, it is as follows. Since the step of pushing up the fitting portion by pushing up the mounting portion to bring the outer peripheral surface of the fitting portion into close contact with the edge of the first through hole, the outer peripheral surface is the first through hole. It can be brought into close contact with the edge of the first through hole, thereby preventing a gap from being formed between the outer peripheral surface and the edge of the first through hole. Then, since the step of attaching the mounting portion to the second ceiling plate is included so that the state in which the outer peripheral surface is in close contact with the edge of the first through hole is maintained by the urging means, the attachment is described. The mounting portion can be mounted on the second ceiling plate while maintaining the close contact state by the force means. Therefore, according to the ceiling manufacturing method, it is possible to manufacture a soundproof double ceiling that suppresses a decrease in sound insulation performance.

Therefore, according to the method for manufacturing the ventilation device and the ceiling according to the present invention, it is possible to suppress the deterioration of the sound insulation performance of the soundproof double ceiling.

It is a vertical sectional view of the ventilation apparatus which concerns on embodiment of this invention. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. It is a vertical cross-sectional view which shows the fitting process of the manufacturing method of the ceiling which concerns on embodiment of this invention. It is a vertical cross-sectional view which shows the modification of the ventilation apparatus which concerns on embodiment of this invention.

Preferred embodiments of the present invention will be described with reference to the drawings. 1 and 2 show a ventilation device 1 according to an embodiment of the present invention.

The soundproof double ceiling includes a first ceiling plate 100, a second ceiling plate 200 arranged below the first ceiling plate 100 at intervals, and a ventilation device 1. The first ceiling plate 100 and the second ceiling plate 200 are ceiling plates installed in a room that requires a high degree of soundproofing measures, and are used to insulate sound between the room and the upper floors of the room. It is a ceiling board for making the ceiling a double structure. The distance between the first ceiling plate 100 and the second ceiling plate 200 is a preset distance, for example, a distance of about 190 mm. The first ceiling plate 100 and the second ceiling plate 200 are each composed of two stacked plate-like members. The plate-shaped member is, for example, gypsum board. The first ceiling plate 100 is formed with a first through hole 110 for passing the ventilation device 1. Similarly, the second ceiling plate 200 is formed with a second through hole 210 for passing the ventilation device 1.

The diameter of the first through hole 110 is larger than the diameter of the ventilation pipe 10 described later. Further, the diameter of the first through hole 110 is smaller than the maximum diameter of the fitting portion 50, which will be described later. The planar shape of the first through hole 110 is a circular shape in the present embodiment. The first through hole 110 is located above the second through hole 210 formed in the second ceiling plate 200 and at a position included in the second through hole 210 in a plan view.

The diameter of the second through hole 210 is larger than the maximum diameter of the fitting portion 50, that is, a diameter larger than the diameter of the first through hole 110. The planar shape of the second through hole 210 is a circular shape in the present embodiment.

The ventilation device 1 is a ventilation device for ventilating a room (not shown) located below the second ceiling plate 200, and is used for 24-hour ventilation of the room, for example. The ventilation device 1 is provided so as to penetrate the first through hole 110 provided in the first ceiling plate 100 and the second through hole 210 provided in the second ceiling plate 200. The ventilation device 1 includes a ventilation pipe 10 and a ventilation member 20.

The ventilation pipe 10 is used to replace (ventilate) the air in the room located below the second ceiling plate 200 with the air outside the room. The tip end portion (unsigned) of the ventilation pipe 10 is arranged in the vicinity of the first through hole 110 of the first ceiling plate 100. The ventilation pipe 10 has a portion arranged above the first ceiling plate 100, and extends to, for example, a ventilation port provided on a wall (not shown).

The ventilation member 20 is a member connected to the tip of the ventilation pipe 10 so that gas can be discharged or introduced through the ventilation pipe 10. The ventilation member 20 is fitted with a mounting portion 30 that can be attached to the second ceiling plate 200 from below, and a fitting portion 50 that is provided above the mounting portion 30 and fits into the first through hole 110 from below. It has an urging means 70 for urging the portion 50 upward.

The fitting portion 50 forms a tubular passage by connecting the ventilation pipe 10, the fitting portion 50, and the mounting portion 30 to each other, and between the ventilation pipe 10 and the first through hole 110 in the radial direction. It is fitted in the first through hole 110 so as to fill the gap between the two. The fitting portion 50 is a hollow member connected to the tip end portion of the ventilation pipe 10. The fitting portion 50 is a member that can be fitted into the first through hole 110 from below.

Specifically, the fitting portion 50 has an outer peripheral surface 52 formed so as to be in close contact with the edge of the first through hole 110 over the entire circumference. As shown in FIG. 1, the outer peripheral surface 52 is formed so as to gradually shrink in the radial direction from the lower side to the upper side. That is, the outer peripheral surface 52 is formed in a stepped shape in which the diameter of the bottom portion is increased and the diameter of the top portion is decreased. Further, the planar shape of the fitting portion 50 is a shape corresponding to the planar shape of the first through hole 110, and in the present embodiment, it is a circular shape.

The outer peripheral surface 52 has a horizontal surface 52h extending in the radial direction and a vertical surface 52v extending vertically from the radial outer edge of the horizontal surface 52h. The plurality of vertical surfaces 52v are in the order from the vertical surface 52v having the diameter of the bottom of the fitting portion 50 to the vertical surface 52v having the diameter of the top of the fitting portion 50, and each diameter decreases in order from the bottom to the top. They are arranged in the order of. Similarly, the plurality of horizontal planes 52h have a horizontal plane 52h in which the diameter of the radial outer edge is the diameter of the bottom of the fitting portion 50 to the horizontal plane 52h in which the diameter of the radial outer edge is the diameter of the top of the fitting portion 50. The diameters are arranged in ascending order from the bottom to the top. Each horizontal plane 52h of the outer peripheral surface 52 has a sufficient area for the posture of the fitting portion 50 to be stable when the horizontal plane 52h comes into surface contact with the lower surface of the first ceiling plate 100. Then, when a specific horizontal plane 52h (in the present embodiment, the third horizontal plane 52h from the top) of the plurality of horizontal planes 52h comes into surface contact with the lower surface of the first ceiling plate 100, as shown in FIG. In addition, the horizontal plane 52h can close the gap between the outer peripheral surface of the ventilation pipe 10 and the edge of the first through hole 110.

The diameter of the top of the fitting portion 50 (the diameter of the upper surface of the fitting portion 50) is smaller than the diameter of the first through hole 110, and is the minimum value of the diameter in the design tolerance of the first through hole 110. Smaller diameter. The diameter of the bottom of the fitting portion 50 (the diameter of the bottom surface of the fitting portion 50) is larger than the diameter of the first through hole 110, and is the maximum value of the diameter in the design tolerance of the first through hole 110. Larger diameter. That is, the fitting portion 50 is formed so that the difference between the diameter of the top portion and the diameter of the bottom portion of the fitting portion 50 exceeds the range of the design tolerance in the radial direction of the first through hole 110.

The mounting portion 30 enables the fitting portion 50 to be mounted on the second ceiling plate 200 from below so that the fitting portion 50 is arranged at a predetermined position and the outer peripheral surface 52 is in close contact with the first through hole 110. Is. The mounting portion 30 is provided below the fitting portion 50. The mounting portion 30 includes a fitting portion support cylinder portion 32, a mounting plate 34, and a cover plate 36.

The fitting portion support cylinder portion 32 is a cylinder for slidably supporting the fitting portion 50 up and down and extending the flow path from the ventilation pipe 10 to the mounting plate 34 and the cover plate 36 described later. The fitting portion support cylinder portion 32 includes a large-diameter portion (unsigned) that surrounds the fitting portion 50 and a small-diameter portion (unsigned) that extends downward from the large-diameter portion and has an inner diameter smaller than the inner diameter of the large-diameter portion. , Have. Then, the urging means 70 described later can be sandwiched between the bottom surface of the fitting portion 50 housed in the large diameter portion 50 and the upper surface of the small diameter portion. The fitting portion support cylinder portion 32 is arranged in a posture extending in the vertical direction inside the second through hole 210 of the second ceiling plate 200. Further, the inner portion of the large-diameter portion of the fitting portion support cylinder portion 32 is formed so as to accommodate the bottom portion of the fitting portion 50 while slidably supporting it in the vertical direction. Further, the top portion of the fitting portion support cylinder portion 32 is formed so that the bottom portion of the fitting portion 50 cannot be detached upward from the inside of the fitting portion support cylinder portion 32. The top of the fitting portion support cylinder portion 32 is formed so as to project inward in the radial direction, for example, and has a shape that allows contact with the vicinity of the bottom portion of the fitting portion 50. The vertical length of the fitting portion support cylinder portion 32 is shorter than the vertical distance between the lower surface of the first ceiling plate 100 and the lower surface of the second ceiling plate 200, and is shorter than the vertical distance. The length is set so that the sum of the height of the fitting portion 50 and the height of the fitting portion 50 is longer than the above interval. When the fitting portion support cylinder portion 32 is pushed upward, the fitting portion 50 is pushed upward through the urging means 70 described later in a state where the bottom portion of the fitting portion 50 is housed inside. Can be done.

The mounting plate 34 is connected to the bottom surface of the fitting portion support cylinder portion 32, and the fitting portion support cylinder portion 32 extends in the vertical direction inside the second through hole 210 of the second ceiling plate 200. It is a plate-shaped member that is fixed in contact with the lower surface of the second ceiling plate 200 so as to be arranged. The mounting plate 34 supports the fitting portion support cylinder portion 32 from below while opening at least a part of the fitting portion support cylinder portion 32 so as to secure the air permeability of the fitting portion support cylinder portion 32. do. As shown in FIG. 1, the mounting plate 34 has a tubular portion (unmarked) fixed to the inner surface of the fitting portion support tubular portion 32 and a horizontal portion (reference numeral) extending horizontally outward from the lower end edge of the tubular portion. None) and. The horizontal portion is connected to the bottom surface of the fitting portion support cylinder portion 32 at the inner portion thereof, and is connected to the lower surface of the second ceiling plate 200 at the outer portion thereof. The horizontal portion is connected to the second ceiling plate 200 by, for example, a screw. The horizontal portion of the mounting plate 34 can function as a handle of the fitting portion support cylinder portion 32 when the fitting portion support cylinder portion 32 connected to the mounting plate 34 is pushed upward.

The cover plate 36 is a plate-shaped member that is connected to the lower surface of the mounting plate 34 and covers the mounting plate 34, the fitting portion support cylinder portion 32, and the ventilation pipe 10 so as not to be seen from below. Like the mounting plate 34, the cover plate 36 is formed and arranged so as to open at least a part of the fitting portion support cylinder portion 32 so as to secure the air permeability of the fitting portion support cylinder portion 32. The cover plate 36 may be provided with a wind direction plate for changing the wind direction of the gas discharged or introduced through the ventilation pipe 10 and the fitting portion support cylinder portion 32. Further, the cover plate 36 may be formed in a mesh shape.

The urging means 70 is a means for urging the fitting portion 50 upward in a state where the mounting plate 34 of the mounting portion 30 is attached to the second ceiling plate 200. The urging means 70 has an elastic member provided between the bottom portion of the fitting portion 50 housed in the inner portion of the fitting portion support cylinder portion 32 and the mounting plate 34 of the mounting portion 30.

The natural length of the elastic member of the urging means 70 is among the plurality of horizontal planes 52h of the fitting portion 50 in a state where the bottom portion of the fitting portion 50 is prevented from coming off at the top of the fitting portion support cylinder portion 32. The vertical length from the horizontal plane 52h for contacting the lower surface of the first ceiling plate 100 to the mounting plate 34 is the vertical length from the lower surface of the first ceiling plate 100 to the lower surface of the second ceiling plate 200. It is set to be larger than the length.

The elastic member included in the urging means 70 may be elastic rubber or a spiral spring. Further, the elastic member included in the urging means 70 may be arranged over the entire circumferential direction of the fitting portion support cylinder portion 32, or may be partially arranged in a certain range in the circumferential direction.

Next, a method of manufacturing the ceiling will be described with reference to FIG.

An object of the ceiling manufacturing method is to suppress deterioration of the sound insulation performance of the soundproof double ceiling. As described above, the soundproof double ceiling has a first ceiling plate 100 provided with the first through hole 110 and a second through hole arranged below the first ceiling plate 100 at a preset interval. A second ceiling plate 200 on which 210 is provided is provided. Through the first through hole 110 and the second through hole 210 formed in the soundproof double ceiling, the above-mentioned ventilation device 1 ventilates a room (not shown) located below the second ceiling plate 200. .. At this time, sound leakage may occur between the upper floor and the room through the gap formed between the ventilation device 1 and the first through hole 110.

The ceiling is manufactured by providing a first ceiling plate 100 having a first through hole 110 and a second ceiling plate having a second through hole 210 arranged below the first ceiling plate 100 at intervals. A method for manufacturing a ceiling in which a ventilation device 1 is installed with respect to 200, which includes a preparation step, a fitting step, and an attachment step.

The preparation step is a step of preparing a work-in-process structure in which the ventilation member 20 connected to the tip end portion of the ventilation pipe 10 is located below the second ceiling plate 200. Specifically, in the preparation step, the tip of the ventilation pipe 10 and the top of the fitting portion 50 are connected in a state where the tip of the ventilation pipe 10 is located below the second ceiling plate 200. ..

In the fitting step, as shown in FIG. 3, the fitting portion 50 is pushed up via the urging means 70 by pushing up the mounting portion 30, and the outer peripheral surface of the fitting portion 50 is brought to the edge of the first through hole 110. This is a step of bringing the 52 into close contact. Specifically, in the fitting step, the urging means 70 is pushed up by pushing up the fitting portion 50 connected to the tip end portion of the ventilation pipe 10 and the mounting plate 34 connected to the fitting portion support cylinder portion 32. Push up through. As a result, the horizontal plane 52h, which is one of the plurality of horizontal planes 52h formed on the outer peripheral surface 52 of the fitting portion 50 and has a diameter larger than the diameter of the first through hole 110, is the first ceiling plate 100. Contact the underside of. As a result, the outer peripheral surface 52 of the fitting portion 50 is brought into close contact with the edge of the first through hole 110, and the fitting portion 50 is fitted into the first through hole 110. By the fitting step, the fitting portion 50 is fitted into the first through hole 110, and a gap is formed between the outer peripheral surface 52 of the fitting portion 50 and the edge of the first through hole 110. Can be prevented.

In the mounting step, the mounting portion 30 is mounted on the second ceiling plate 200 so that the outer peripheral surface 52 of the fitting portion 50 is maintained in close contact with the edge of the first through hole 110 by the urging means 70. It is a process. Specifically, it is as follows. The mounting step is a step performed after the fitting step of FIG. In the mounting step, the mounting plate 34 is further mounted while sandwiching the urging means 70 between the bottom surface of the fitting portion 50 that fits into the first through hole 110 and the upper surface of the small diameter portion of the fitting portion support cylinder portion 32. Push up. Then, the mounting plate 34 comes into contact with the lower surface of the second ceiling plate 200 while the elastic member of the urging means 70 is compressed. Then, the mounting plate 34 in contact with the second ceiling plate 200 is connected to be fixed to the lower surface of the second ceiling plate 200. By the mounting process, the mounting portion 30 is fixed, and a state in which the urging means 70 having an elastic member provided between the fitting portion 50 and the mounting portion 30 urges the fitting portion 50 upward is maintained. NS.

The operation and effect of the ventilation device 1 and the method for manufacturing the ceiling according to the present embodiment will be described.

According to the ventilation device 1, the outer peripheral surface 52 of the fitting portion 50 is formed so as to be in close contact with the edge of the first through hole 110 over the entire circumference. Therefore, it is possible to prevent a gap from being formed between the outer peripheral surface 52 and the edge of the first through hole 110 when the fitting portion 50 is pushed up toward the first through hole 110. Further, since the urging means 70 urges the fitting portion 50 upward while the mounting portion 30 is attached to the second ceiling plate 200, the state without the gap can be maintained. Therefore, sound leakage is suppressed through the first through hole 110 that is maintained in a state where there is no gap between the fitting portion 50 and the outer peripheral surface 52, and the sound insulation performance of the soundproof double ceiling is deteriorated. It can be suppressed.

Further, since the outer peripheral surface 52 of the fitting portion 50 is gradually reduced in the radial direction from the lower side to the upper side, a plurality of surfaces that intersect in the vertical direction are formed on the outer peripheral surface 52 and intersect in the plurality of vertical directions. Any one of such surfaces can come into contact with the lower surface of the first ceiling plate 100 in a planar manner. Therefore, sound leakage can be prevented more effectively than in the case where the outer peripheral surface 52 contacts the first through hole 110 in a point-like or linear manner to prevent sound leakage.

Specifically, since the bottom portion of the fitting portion 50 is accommodated and supported by the inner portion of the through-cylinder portion 32, the fitting portion 50 is pushed upward by pushing up the mounting plate 34 and the cover plate 36. Can be Of the plurality of vertical surfaces 52v and the plurality of horizontal planes 52h formed on the outer peripheral surface 52 of the fitting portion 50 pushed upward, the vertical surface 52v having a diameter smaller than the diameter of the first through hole 110 is the first. It can enter the through hole 110 of 1. On the other hand, the vertical surface 52v having a diameter larger than the diameter of the first through hole 110 does not enter the first through hole 110, and further, a radial inner edge smaller than the diameter of the first through hole 110. 52h, which has a diameter of the horizontal surface and a diameter of the outer edge in the radial direction larger than the diameter of the first through hole 110, comes into contact with each other in such a manner that the horizontal surface 52h is caught on the lower surface of the first ceiling plate 100. As a result, the outer peripheral surface 52 of the fitting portion 50 can be brought into close contact with the edge of the first through hole 110 over the entire circumference.

Further, the fitting portion, the mounting portion, and the elastic member are separate members, and these can be individually designed according to their roles. Specifically, it is as follows. The elastic member of the urging means 70 can be designed for the purpose of exerting an urging force for urging the fitting portion 50 upward. On the other hand, the fitting portion 50 can be designed by controlling the dimensions for fitting into the first through hole 110 from below. Further, the mounting portion 30 can be designed so that it can be mounted on the second ceiling plate 200 and the fitting portion 50 is pushed up at the same time when it is pushed up. That is, since the design of each part can be individually managed, the design management becomes easy.

Further, by pushing up the mounting portion 30, when the fitting portion 50 is pushed up toward the first through hole 110 via the urging means 70, the fitting portion 50 fits into the first through hole 110. After that, the fitting portion support cylinder portion 32 can slide while supporting the fitting portion 50 to bring the mounting portion 30 into contact with the second ceiling plate 200.

Further, according to the method of manufacturing the ceiling, when the mounting portion 30 is pushed up, the fitting portion 50 is pushed up via the urging means 70 to fit into the first through hole 110, and the mounting portion 30 is the first. The fitting portion 50 is urged upward by the urging means 70 in a state of being attached to the ceiling plate 200 of 2, and the fitting portion 50 is urged upward between the outer peripheral surface 52 of the fitting portion 50 and the edge of the first through hole 110. It is possible to manufacture a soundproof double ceiling in which a state without gaps is maintained, sound leakage is suppressed through the first through hole 110, and deterioration of sound insulation performance is suppressed.

Specifically, it is as follows. By pushing up the mounting portion 30, the fitting portion 50 is pushed up via the urging means 70, and the outer peripheral surface 52 of the fitting portion 50 is brought into close contact with the edge of the first through hole 110. The 52 can be brought into close contact with the edge of the first through hole 110, thereby preventing a gap from being formed between the outer peripheral surface 52 and the edge of the first through hole 110. Then, since the step of attaching the mounting portion 30 to the second ceiling plate 200 is included so that the state in which the outer peripheral surface 52 is in close contact with the edge of the first through hole 110 is maintained by the urging means 70, the urging means is urged. The mounting portion 30 can be mounted on the second ceiling plate 200 while maintaining the close contact state by the means 70. Therefore, according to the ceiling manufacturing method, it is possible to manufacture a soundproof double ceiling that suppresses deterioration of sound insulation performance.

The present invention is not limited to the one in which the outer peripheral surface of the fitting portion gradually shrinks in the radial direction from the lower side to the upper side, and the outer peripheral surface is formed so as to be in close contact with the edge of the first through hole over the entire circumference. However, for example, it may have a tapered shape that shrinks in the radial direction from the bottom to the top.

Further, the present invention is not limited to the case where the fitting portion is accommodated and supported in the inner portion of the fitting portion support cylinder portion, and the fitting portion support cylinder portion is communicated with the ventilation pipe via the fitting portion. Anything may be used, for example, the fitting portion support cylinder portion may be inserted inside the fitting portion.

Further, the present invention is not limited to those in which the urging means is housed in the inner portion of the fitting portion support cylinder portion, and the urging means is in a state where the mounting portion is attached to the second ceiling plate. The elastic member of the urging means may be sandwiched between the fitting portion and the mounting plate.

In order to explain this, the ventilation device 1A, which is a modification of the ventilation device 1 according to the above embodiment, will be described with reference to FIG. In the following description, the same components as those according to the above embodiment shall be designated by the same reference numerals to omit or abbreviate the description, and different components shall be mainly described. do.

The ventilation device 1A shown in FIG. 4 includes a ventilation pipe 10 and a ventilation member 20A.

The ventilation member 20A is fitted with a mounting portion 30A that can be attached to the second ceiling plate 200 from below, and a fitting portion 50A that is provided above the mounting portion 30A and is fitted into the first through hole 110 from below. It has an urging means 70A that urges the portion 50A upward.

The fitting portion 50A is for filling the gap between the ventilation pipe 10 and the first through hole 110 in the radial direction while maintaining the state in which the ventilation pipe 10 communicates with the first through hole 110. Is. The fitting portion 50A has an outer peripheral surface 52A formed in a tapered shape that contracts in the radial direction from the lower side to the upper side. Also in this modification, the fitting portion 50A has a length such that the difference between the diameter of the top and the diameter of the bottom of the fitting portion 50A exceeds the range of the design tolerance in the radial direction of the first through hole 110. Is formed. Further, the bottom portion of the fitting portion 50A is formed so that the top portion of the urging means 70A, which will be described later, can come into contact with the bottom portion. The planar shape of the fitting portion 50A is a shape formed corresponding to the planar shape of the first through hole 110.

The mounting portion 30A includes a fitting portion support cylinder portion 32A, a mounting plate 34, and a cover plate 36.

The fitting portion support cylinder portion 32A is a cylinder for slidably supporting the fitting portion 50A and extending the flow path from the ventilation pipe 10 to the mounting plate 34 and the cover plate 36, which will be described later. The fitting portion support cylinder portion 32A is inserted into the inside of the fitting portion 50A while contacting the inner peripheral surface of the fitting portion 50A and sliding on the inner peripheral surface. That is, the fitting portion support cylinder portion 32A is formed in a cylindrical shape, and is formed so that the diameter of the outer peripheral surface of the fitting portion support cylinder portion 32A substantially matches the diameter of the inner peripheral surface of the fitting portion 50A. ing. The outer peripheral surface of the fitting portion support cylinder portion 32A is formed so as to support the urging means 70A described later in the radial direction. The vertical length of the fitting portion support cylinder portion 32A is longer than the sum of the height of the fitting portion 50A and the vertical distance between the first ceiling plate 100 and the second ceiling plate 200. The length.

The urging means 70A is a means for urging the fitting portion 50A upward in a state where the mounting plate 34 of the mounting portion 30A is attached to the second ceiling plate 200. The elastic member of the urging means 70A is between the bottom portion of the fitting portion 50A and the mounting plate 34, and is in contact with the outer peripheral surface of the fitting portion support cylinder portion 32A so that the fitting portion support cylinder portion 32A is in contact with the outer peripheral surface of the fitting portion support cylinder portion 32A. It is located on the outside of.

The action and effect of the ventilation device 1A according to this modification will be described.

According to the ventilator 1A, the outer peripheral surface 52A of the fitting portion 50A has a tapered shape that contracts in the radial direction from the lower side to the upper side. The outer peripheral surface 52A can be brought into close contact with the edge of the first through hole 110 at a position where the contact drag between the 52A and the edge of the first through hole 110 and the urging force by the urging means 70A are balanced. As a result, it is possible to prevent sound from leaking through the first through hole 110, and even if the tolerance in the design of the shape of the first through hole 110 and the shape of the fitting portion 50A is increased, the above-mentioned Since the outer peripheral surface 52A can be brought into close contact with the edge of the first through hole by the action of the urging force, the design accuracy of each of the shape of the first through hole 110 and the shape of the fitting portion 50A can be relaxed. ..

Further, since the fitting portion support cylinder portion 32A is inserted inside the fitting portion 50A, the fitting portion support cylinder portion 32A and the fitting portion 50A are separated from each other in the state before the ventilation device 1A is attached. be able to. Similarly, since the elastic member of the urging means 70A is arranged outside the fitting portion support cylinder portion 32A, the fitting portion support cylinder portion 32A and the urging means 70A are in a state before the ventilation device 1A is attached. Can be separated from the elastic member of the. That is, in the state before the ventilation device 1A is attached, the attachment portion 30A, the fitting portion 50A, and the urging means 70A constituting the fitting portion support cylinder portion 20A can be separated, so that the ventilation device 1A can be separated. It becomes easy to carry, the ventilation device 1A can be assembled at the construction site at the time of installation of the ventilation device 1A, and it becomes easy to disassemble at the time of maintenance.

Further, although not shown, the present invention includes the following modifications.

The present invention is not limited to a material in which the fitting portion has relatively high rigidity, for example, one made of metal or plastic, and the fitting portion may be made of a material having elasticity, for example, rubber.

According to this modification, the outer peripheral surface of the fitting portion can be adapted to the shape of the first through hole and can be brought into close contact with the edge of the first through hole. Therefore, the design accuracy of the shape of the first through hole and the shape of the fitting portion can be relaxed.

Further, in the present invention, the fitting portion may have elasticity and also serve as an urging means. For example, as a modification of the ventilation device 1 according to the above-described embodiment, the fitting portion 50 has elasticity, and the bottom portion of the fitting portion 50 and the top portion of the fitting portion support cylinder portion 32 are connected and fixed to each other. In this case, by pushing up the mounting portion 30, the fitting portion 50 itself is compressed in the vertical direction to generate an urging force, and the outer peripheral surface 52 of the fitting portion 50 is set to the edge of the first through hole 110. It may be configured to be brought into close contact with the first through hole 110.

According to this modification, the fitting portion 50 is urged upward by its own elasticity, and can maintain a state in which the outer peripheral surface 52 is in close contact with the edge of the first through hole 110 over the entire circumference. .. Further, since the fitting portion 50 also serves as the urging means, the separately provided urging means 70 becomes unnecessary, and the number of parts of the entire ventilation device 1 can be reduced.

Further, in the present invention, the fitting portion and the fitting portion to be fitted into the first through hole from below are slidably supported up and down, and the flow path from the ventilation pipe is extended to the mounting plate and the cover plate. The fitting portion and the fitting portion support cylinder portion of the above are integrally formed, and the integrally formed fitting portion and the fitting portion support cylinder portion may have elasticity and also serve as an urging means.

Further, in the present invention, a fitting portion that fits into the first through hole from below and a fitting portion that can be attached to the second ceiling plate from below are integrally formed, and the fitting portion and the integrally formed fitting portion are formed. The mounting portion may have elasticity and also serve as an urging means.

According to this modification, since the fitting portion, the mounting portion, and the urging means constituting the ventilation member of the ventilation device are integrally formed, it is possible to reduce the number of parts of the entire ventilation device and to ventilate. Since the device 1 can be assembled only by the step of connecting the ventilation pipe and the ventilation member at the time of assembling the device 1, the ventilation device 1 can be easily assembled.

In the present invention, not only in the above-described modification, but also in the ventilation device 1 according to the embodiment, the fitting portion, the mounting portion, and the urging means may be detachable.

According to this modification, the ventilation device can be easily transported, the ventilation device can be assembled at the construction site at the time of installation of the ventilation device, and the ventilation device can be easily disassembled at the time of maintenance.

The present invention is not limited to one in which each of the mounting plate and the cover plate of the mounting portion is a single plate-shaped member, and the fitting portion support cylinder portion is lowered while ensuring the air permeability of the fitting portion support cylinder portion. It may be a plurality of members supported from the side.

Further, the present invention is not limited to those in which the mounting plate and the cover plate are separate members, and may be integrally formed members.

The present invention is not limited to the first ceiling plate and the second ceiling plate formed by stacking two plate-like members, respectively, and the first ceiling plate and the second ceiling plate are each one. It may be composed of one or more plate-shaped members.

In the present invention, the shapes of the first through hole and the second through hole are not limited to those having a circular shape in a plan view, and may have other shapes, for example, a rectangular shape. May be good.

In the present invention, the shape of the first through hole is not limited to the shape formed by a vertical surface having no step in a vertical cross-sectional view, and is, for example, a shape that gradually shrinks in the radial direction from the lower side to the upper side. There may be.

According to this modification, when the fitting portion is fitted into the first through hole, for example, a step formed by a horizontal surface 52h and a vertical surface 52v of the outer peripheral surface 52 of the fitting portion 50 according to the above embodiment. The surface can be brought into close contact with the stepped surface formed by the first through hole, more effectively prevent sound leakage through the first through hole, and suppress the deterioration of the sound insulation performance of the soundproof double ceiling. can do.

Further, the present invention is not limited to the shape of the fitting portion having a circular shape in a plan view and a stepped shape or a tapered shape that shrinks in the radial direction from the lower side to the upper side in a vertical cross-sectional view. May be formed corresponding to the shape of the first through hole or may be deformed corresponding to the shape of the first through hole. For example, if the shape of the first through hole in the plan view is rectangular, the shape of the fitting portion in the plan view may also be rectangular. Further, for example, the fitting portion is made of a flexible material, and by pushing the fitting portion into the first through hole, the shape of the fitting portion is deformed corresponding to the shape of the first through hole. , The outer peripheral surface of the fitting portion may be in close contact with the edge of the first through hole over the entire circumference. In this case, the urging means urges the fitting portion upward so that the fitting portion does not come out of the first through hole. Further, in this case, when pushing the fitting portion into the first through hole, the mounting portion may be pushed up and pushed through the urging means, or may be pushed directly by hand. Further, when the fitting portion is pushed into the first through hole by hand, the second through hole formed in the second ceiling plate has a size sufficient for the hand to be inserted. You may.

1, 1A Ventilation device 10 Ventilation pipe 20, 20A Ventilation member 30, 30A Mounting part 32, 32A Fitting part Support cylinder part 34 Mounting plate 36 Cover plate 50, 50A Fitting part 52, 52A Outer peripheral surface 52h Horizontal surface 52v Vertical surface 70 , 70A Biasing means 100 1st ceiling plate 110 1st through hole 200 2nd ceiling plate 210 2nd through hole

Claims (7)

Through the first through hole provided in the first ceiling plate and the second through hole provided in the second ceiling plate arranged below the first ceiling plate at intervals. It is a ventilation device that is installed
The ventilation device is
A ventilation pipe having a portion arranged above the first ceiling plate,
A ventilation member connected to the tip of the ventilation pipe so that gas can be discharged or introduced through the ventilation pipe.
With
The ventilation member is
A mounting portion that can be mounted on the second ceiling plate from below,
A fitting portion provided on the upper part of the mounting portion and fitted into the first through hole from below, and a fitting portion.
An urging means for urging the fitting portion upward while the mounting portion is attached to the second ceiling plate.
Have,
The fitting portion has an outer peripheral surface formed so as to be in close contact with the edge of the first through hole over the entire circumference.
Ventilation system. The outer peripheral surface of the fitting portion gradually shrinks in the radial direction from the bottom to the top.
The ventilation device according to claim 1. The outer peripheral surface of the fitting portion has a tapered shape that shrinks in the radial direction from the bottom to the top.
The ventilation device according to claim 1. The urging means has an elastic member provided between the fitting portion and the mounting portion.
The ventilation device according to any one of claims 1 to 3. The mounting portion has a fitting portion support tubular portion formed in a tubular shape so as to slidably support the fitting portion.
The ventilation device according to claim 4. The fitting portion has elasticity and also serves as the urging means.
The ventilation device according to any one of claims 1 to 3. Claims 1 to 1 to the first ceiling plate provided with the first through hole and the second ceiling plate provided with the second through hole arranged below the first ceiling plate at intervals. A method for manufacturing a ceiling in which the ventilation device according to any one of claims 6 is installed.
A step of preparing a work-in-progress structure in which the ventilation member connected to the tip end portion of the ventilation pipe is located below the second ceiling plate.
A step of pushing up the fitting portion by pushing up the mounting portion to bring the outer peripheral surface of the fitting portion into close contact with the edge of the first through hole.
A step of attaching the mounting portion to the second ceiling plate so that the state in which the outer peripheral surface is in close contact with the edge of the first through hole is maintained by the urging means.
including,
Ceiling manufacturing method.

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