JP6906382B2 - Silencer and how to assemble it - Google Patents

Description

The present invention relates to a muffling device, and more particularly to a muffling device used in ventilation equipment. The present invention also relates to a method of assembling a muffling device.

In ventilation equipment, a muffler may be installed in the air passage to prevent the noise generated by the ventilation fan or the noise inside the building from being radiated to the outside. The silencer is designed according to the air volume handled by the ventilation equipment and the required sound reduction performance. It is possible to provide a single silencer (hereinafter referred to as a silencer unit) designed for each ventilation facility. It is also possible to provide a muffler (in other words, an assembly type muffler) designed by combining a plurality of mufflers.

In the assembled silencer, it is possible to provide a silencer suitable for the air volume to be handled by increasing or decreasing the number of silencer units to be combined. However, when an assembly type silencer is applied to a ventilation facility having a large air volume, for example, installed in a road tunnel, many silencers are required. It takes a lot of time to combine many muffling units and install them in the ventilation system. In addition, a large number of closers are required so that the plurality of silencer units assembled due to the pressure of the airflow passing through the air passage and the influence of the earthquake do not move.

Patent Document 1 describes a method of manufacturing a muffling device including a plurality of muffling cylinders. In Patent Document 1, communication holes are formed in the outer cylinders of two adjacent sound deadening cylinders facing each other, and pin-shaped fixtures are inserted into both through holes. The method of Patent Document 1 requires a large number of fixtures. Further, when a force is applied in a direction in which the pin-shaped fixture can be inserted and removed due to an earthquake or the like, there is a possibility that the position shift between the sound deadening cylinders. In addition, it is difficult to join the outer cylinders of the sound deadening cylinders in close contact with each other, and a gap is likely to occur. If a gap is created between the outer cylinders, sound is generated by the airflow passing through the gap, and the sound reduction performance of the muffling cylinder may deteriorate. In addition, the sound inside the sound deadening cylinder may leak to the outside through the gap, and the sound reduction performance of the sound deadening device may deteriorate.

Patent Document 2 describes a method for manufacturing a honeycomb-shaped sound deadening body using an adhesive. In Patent Document 2, a plurality of composite plates stacked on top of each other are bonded to each other in a staggered manner at predetermined intervals using an adhesive. By widening the unfixed portion between the bonded portions in the width direction, a plurality of honeycomb-shaped air passages are formed. The composite plate is made of a soft, relatively low-strength material such as aluminum foil and maltoprene because it needs to be spread after bonding. Therefore, the silencer is not suitable for ventilation equipment through which high-speed airflow passes.

Japanese Unexamined Patent Publication No. 2001-92466 Japanese Unexamined Patent Publication No. 58-106113

According to one embodiment of the present invention, it is possible to provide a sound deadening device that can be assembled by a simple method and in a short time and has excellent sound reduction performance. Further, according to one embodiment of the present invention, it is possible to provide a sound deadening device that can be assembled by a simple method and in a short time, and has excellent sound reduction performance and strength.

According to one embodiment of the present invention, it is a muffling device including a plurality of muffling units having an airflow flow path inside, and the plurality of muffling units arranged in parallel in the lateral direction with respect to the airflow flow path face each other. A silencer is provided in which a recess is formed in at least one of the two surfaces arranged in the recess and an adhesive is placed in the recess.
According to one embodiment of the present invention, it is a muffling device including a plurality of muffling units having an airflow flow path inside, and the plurality of muffling units arranged in series in the direction of the airflow flow path are arranged so as to face each other. A silencer is provided in which recesses are formed on at least one of the two surfaces and an adhesive is placed in the recesses.

According to one embodiment of the present invention, it is a muffling device including a plurality of muffling units arranged adjacent to each other and a casing accommodating a plurality of muffling units, and the casing and the muffling unit are arranged facing each other. A silencer is provided in which a recess is formed in at least one of the two surfaces and an adhesive is placed in the recess.

According to one embodiment of the present invention, it is a method of assembling a muffling device including a plurality of muffling units, and includes a step of joining two surfaces of adjacent muffling units arranged opposite to each other at least partially. A method is provided in which the joining step includes a step of arranging an adhesive in a recess formed on at least one of the two surfaces and a step of superimposing the two surfaces on each other.

According to one embodiment of the present invention, there is a method of assembling a muffling device including a plurality of muffling units and a casing accommodating a plurality of muffling units, in which two surfaces of the casing and the muffling unit are arranged so as to face each other. A method comprising at least partially joining, the joining step comprising placing an adhesive in a recess formed in at least one of the two surfaces and superimposing the two surfaces on top of each other. Is provided.

It is an external perspective view which shows the muffling unit used for the muffling device of 1st Embodiment of this invention. FIG. 5 is a cross-sectional view taken along the line AA of the muffling unit of FIG. It is a front view of the muffling device of 1st Embodiment. It is a perspective view which shows the joint part of the sound deadening unit used in 1st Embodiment. It is a perspective view which shows another example of the joint part of 1st Embodiment. It is a perspective view which shows another example of the joint part of 1st Embodiment. It is sectional drawing explaining the joining process of 1st Embodiment. It is sectional drawing explaining the joining process of 1st Embodiment. It is sectional drawing which shows the joint part of the muffling unit used in the muffling device of the 2nd Embodiment of this invention. It is sectional drawing explaining the joining process of 2nd Embodiment. It is sectional drawing explaining the joining process of 2nd Embodiment. It is a figure explaining the 1st modification of 2nd Embodiment. It is a figure explaining the 1st modification of 2nd Embodiment. It is a figure explaining the 2nd modification of 2nd Embodiment. It is a figure explaining the 2nd modification of 2nd Embodiment. It is sectional drawing which shows the joint part of the muffling unit used in the muffling device of the 3rd Embodiment of this invention. It is sectional drawing explaining the joining process of 3rd Embodiment. It is sectional drawing explaining the joining process of 3rd Embodiment. It is a perspective view which shows the joint part of the muffling unit used in the muffling device of 4th Embodiment of this invention. It is a side view of FIG. 11A. It is a perspective view which shows the other example of the joint part of 4th Embodiment. It is a side view of FIG. 12A. It is a perspective view which shows the other example of the joint part of 4th Embodiment. It is sectional drawing of the muffling device of 5th Embodiment of this invention, and is the sectional view taken along the line B1-B1 of FIG. 14B. It is a side view of the muffling device of FIG. 14A. It is sectional drawing which shows the other example of 5th Embodiment, and is the sectional view taken along the line B2-B2 of FIG. 15B. It is a side view of the muffling device of FIG. 15A. It is sectional drawing which shows the other example of 5th Embodiment. It is sectional drawing which shows the other example of 5th Embodiment. It is a figure which shows another example of a joint surface. It is external perspective view which shows the other example of the muffling unit used in the muffling device of embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the accompanying drawings, the same or similar elements are designated by the same or similar reference numerals, and duplicate description of the same or similar elements may be omitted in the description of each embodiment. In addition, the features shown in each embodiment can be applied to other embodiments as long as they do not contradict each other. Further, in the following description, terms indicating directions such as "up" and "down" are used with respect to the installation state of the illustrated silencer unless otherwise specified.

[First Embodiment]
Hereinafter, the silencer according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4E. The muffling device includes a plurality of muffling units 100 arranged adjacent to each other. FIG. 1 is an external perspective view showing an example of a muffling unit 100 constituting the muffling device of the first embodiment. FIG. 2 is a cross-sectional view taken along the line AA of the muffling unit 100 of FIG.

The overall outline of the muffling unit 100 will be described with reference to FIGS. 1 and 2. The sound deadening unit 100 of this example has a substantially rectangular parallelepiped outer shape, and has an air flow path P inside. Specifically, the sound deadening unit 100 includes a tubular side plate 101, a perforated plate 102 arranged inside the tubular side plate 101 along the length direction of the side plate 101, and both ends of the side plate 101 in the length direction. It includes a frame body (in other words, a muffling unit main body) including an end plate 103 to be arranged. As shown in FIG. 2, the frame body defines a space S for accommodating the sound absorbing material 104 on the outside of the airflow flow path P. The sound absorbing material 104 is arranged in the space S between the side plate 101 and the perforated plate 102, and the end plate 103 closes the space S at both ends in the length direction of the side plate 101. The perforated plate 102 has a non-shielding portion 102A formed with fine holes for bringing air passing through the air flow path P into contact with the sound absorbing material 104. As an example, the non-shielding portion 102A is a fiber plate obtained by molding punching metal or fibers into a plate shape. The fiber plate is, for example, a metal fiber formed into a plate shape. Around the non-shielding portion 102A, a mounting end portion 102B is provided to enable mounting of the perforated plate 102 to other members. In the following description, the side plate 101 and the end plate 103 may be referred to as an outer plate, and the perforated plate 102 may be referred to as an inner plate. The side plate 101, the mounting end 102B of the perforated plate 102, and the end plate 103 form a shielding portion of the sound deadening unit 100. The shielding portion is a structural portion capable of completely blocking spatial communication, unlike the non-shielding portion 102A of the perforated plate 102. The shielding portion can be formed of a general aluminum plate, a zinc steel plate, or the like. Further, as long as the material itself has a shielding structure, various materials including plastic can be selected. The sound deadening unit 100 of this example is a cell type sound deadening unit in which the entire air flow path P is surrounded by an inner plate and a sound absorbing material 104. However, the muffling unit 100 may be a splitter type muffling unit in which a part of the airflow flow path P is surrounded only by an outer plate (specifically, a side plate 101).

FIG. 1 shows a recess 32 formed on the upper surface of the side plate 101 of the muffling unit 100. As will be described later, the recess 32 is a portion where an adhesive for joining the plurality of sound deadening units 100 to each other is arranged.

FIG. 3 is a front view showing the muffling device 1000 of the first embodiment. In FIG. 3, the muffling units 100 of FIG. 1 are arranged vertically and horizontally (in other words, laterally with respect to the airflow passage P or in a direction crossing the airflow passage P) in a 2x2 arrangement. .. However, the number and arrangement of the muffling units 100 constituting the muffling device 1000 are not limited to those shown in the figure.

In the muffling device 1000 of the first embodiment, a recess is formed on one of two surfaces (in other words, a joint surface) of adjacent muffling units 100 arranged opposite to each other. The two surfaces are joined together via an adhesive placed in the recess. In the illustrated example, the joint surface is the outer surface of the side plate 101 of the muffling unit 100.

As an example, FIG. 4A shows the configuration of a joint portion of adjacent muffling units 100. In the illustrated example, two sound deadening units 100 arranged vertically adjacent to each other are joined to each other. Specifically, the lower surface of the side plate 101 of the muffling unit 100 arranged on the upper side (in other words, the lower surface of the muffling unit 100) and the upper surface of the side plate 101 of the muffling unit 100 arranged on the lower side (in other words). Then, the upper surface of the muffling unit 100) is arranged so as to face each other. A recess 32 is formed in the side plate 101 arranged on the lower side of FIG. 4A. The side plates 101 are joined to each other via an adhesive arranged in the recess 32. The recess 32 in FIG. 4A has a substantially hemispherical shape. As shown in FIG. 4A, the recesses 32 are arranged in dots with respect to the side plate 101 serving as a joint surface.

The hemispherical recess 32 of FIG. 4A has a semicircular cross-sectional shape in the depth direction. However, the cross-sectional shape of the recess 32 is not particularly limited. In consideration of workability, recesses 32 having various cross-sectional shapes such as a rectangular shape and a triangular shape can be formed. The recess 32 can function as an adhesive loading portion that receives the adhesive. Therefore, the internal volume of the recess 32 can be determined according to the amount of adhesive required.

Further, instead of or in addition to the recesses 32 arranged in a dot shape, recesses 132 and 232 in the form of elongated grooves having a certain length are formed as shown in FIGS. 4B to 4C. May be good. FIG. 4B shows an example in which the recess 132 forms a groove extending in a direction crossing the direction of the air flow (that is, the length direction of the side plate 101). FIG. 4C shows an example in which the recess 232 forms a groove extending along the direction of the air flow. However, as another example, a grid-like groove may be formed by combining the groove 132 of FIG. 4B and the groove 232 of FIG. 4C. Further, the point-shaped recesses 32 of FIG. 4A may be combined with the grid-like grooves.

The recess 32 can be formed at a position on the side plate 101 that serves as a joint surface, which is particularly desired to be sealed. When the groove-shaped recess 132 extending in the direction crossing the direction of the air flow is formed as shown in FIG. 4B, it is possible to prevent the air flow and sound waves from leaking through the gap between the sound deadening units 100. Therefore, it is possible to prevent the generation of unwanted airflow noise and the transmission of sound waves, and it is possible to prevent the sound reduction performance of the silencer 1000 from being deteriorated.

Further, as shown in FIGS. 4A to 4C, in the first embodiment, convex portions 35, 133, 233 that can be inserted into the concave portions 32, 132, and 232 are formed on the surface 101 arranged on the lower side of the drawing. ing. Examples of the joining process in this case are shown in FIGS. 4D and 4E. 4D and 4
The two surfaces 30, 31 shown in E correspond to, for example, the surface of the side plate 101 in FIG. 4A. The surfaces 30 and 31 are joined to each other via an adhesive 33 arranged in the recess 32. Specifically, as shown in FIG. 4D, the adhesive 33 is placed in the recess 32 before the stacking process of the surfaces 30 and 31. At this time, the adhesive 33 can be held in the recess 32 without flowing out from the recess 32 due to its surface tension. A sufficient amount of adhesive 33 to leak out of the recess 32 when the two surfaces 30 and 31 are overlapped can be placed in the recess 32. Further, if the amount of the adhesive 33 sufficient to leak from the recess 32 when the two surfaces 30 and 31 are overlapped does not exceed the volume of the recess 32, a liquid adhesive having a low viscosity may be used. can. Next, as shown in FIG. 4E, the surface 31 is superposed on the surface 30 so that the convex portion 35 is inserted into the concave portion 32. As a result, the adhesive 33 in the concave portion 32 is pressed by the convex portion 35. As shown in FIG. 4E, the adhesive 33 leaks out of the recess 32 and is spread between the surfaces 30 and 31. When the adhesive 33 is cured, the surfaces 30 and 31 are fixed to each other. In this way, the surfaces 30 and 31 can be joined in close contact with each other by the adhesive 33. The amount of adhesive 33 may be adjusted to obtain the desired adhesive area. Further, since the adhesive 33 exists between the concave portion 32 and the convex portion 35 after joining, the gap between the concave portion 32 and the convex portion 35 after joining is set according to the amount of the required adhesive 33. You can decide. Further, as the adhesive 33, for example, an adhesive (adhesive in a capsule) contained in a capsule-shaped container made of hard or soft resin or metal can be used.

The combination of the concave portion 32 and the convex portion 35 can function as a mark for positioning the sound deadening unit 100. In the examples of FIGS. 4D and 4E, the surfaces 30 and 31 are overlapped by relative movement in the vertical direction of the figure (that is, a direction substantially perpendicular to the joint surfaces 30 and 31). However, the surfaces 30 and 31 may be overlapped by sliding movement in the direction along the joint surfaces 30 and 31 (horizontal direction in the figure).

When the hemispherical concave portion 32 and the convex portion 35 as shown in FIG. 4A are formed on the upper and lower surfaces of the sound deadening unit 100, the concave portion 32 is formed against an external force in any direction other than the vertical direction (vertical direction in the figure). It can be engaged with the convex 35 portion. Therefore, a high bonding strength can be obtained with respect to an external force in any direction other than the vertical direction. In the case of the groove-shaped concave portion 132 extending in the direction crossing the air flow direction as shown in FIG. 4B, the concave portion 132 can be engaged with the opposing convex portion 133 in the air flow direction. Therefore, a high bonding strength can be obtained with respect to the force applied in the airflow direction. Further, since the sound deadening unit 100 can be moved along the groove-shaped recess 132 until the adhesive is cured, the position of the sound deadening unit 100 can be finely adjusted along the direction of the groove 132. In the case of the groove-shaped concave portion 232 extending in the air flow direction as shown in FIG. 4C, the groove 232 can be engaged with the convex portion 233 in the direction crossing the air flow direction. Therefore, a high bonding strength can be obtained with respect to a force applied in the direction crossing the airflow direction. Further, since the muffling unit 100 can be moved along the groove-shaped recess 232 until the adhesive is cured, the position of the muffling unit 100 can be finely adjusted along the direction of the groove 232. By combining the forms of FIGS. 4B and 4C, high bonding strength can be obtained against any external force in the direction along the bonding surface.

As described above, in the first embodiment, the adjacent sound deadening units 100 can be joined in close contact with each other at a desired position by using the adhesive 33. Since no joining member such as a holding metal or a pin is required, the number of parts of the sound deadening device 1000 can be reduced as compared with the conventional technique. In addition, the man-hours and assembly time for assembling the silencer 1000 can be shortened. Further, since the adhesive 33 loaded in the recesses 32, 132, and 232 can be expanded, the work of applying the adhesive 33 is unnecessary. Further, since the two surfaces 30 and 31 can be joined in close contact with each other, the sound reduction performance is not deteriorated due to sound leakage or generation of airflow sound.

Further, in the first embodiment, a combination with the convex portions 35, 133, and 233 that can be inserted into the concave portions 32, 132, and 232 is used. Recesses 32, 132, 232 and protrusions 35, 133, 2
Since the 33 can function as a mark when aligning the adjacent muffling units 100, the positioning of the muffling unit 100 becomes easy. Further, by engaging the concave portions 32, 132, 232 with the convex portions 35, 133, and 233, it is possible to provide excellent joint strength particularly with respect to an external force in the direction along the joint surfaces 30 and 31.

The shape of the convex portion 35 is not particularly limited as long as the convex portions 35, 133, and 233 can be inserted into the concave portions 32, 132, and 232. For example, conical protrusions 35, 133, and 233 may be formed on the hemispherical recesses 32, 132, and 232. Further, in FIGS. 4B and 4C, the groove-shaped recesses 132 and 232 extend continuously over the entire length direction or width direction of the side plate 101 serving as the joint surface. However, in the first embodiment, the groove-shaped recesses 132 and 232 may extend over a part of the side plate 101 to be the joint surface in the length direction or the width direction, and the position thereof is not particularly limited.

[Second Embodiment]
In the muffling device 1000 of the first embodiment, the recess 32 is formed on one surface 30 of the two surfaces 30 and 31 arranged opposite to each other of the adjacent muffling units 100, and the recess 32 is formed on the other surface 31. A convex portion 35 that can be inserted into is formed. However, in the muffling device of the second embodiment, as shown in FIG. 5, a recess 32 is formed on one surface 30 of the two surfaces 30 and 31 arranged so as to face each other of the adjacent muffling units, and the other. On the surface 31 of the above, the portion arranged facing the recess 32 is flat. In other configurations, the muffling device of the second embodiment is substantially the same as the muffling device 1000 of the first embodiment. Therefore, detailed description of the configuration common to the first embodiment will be omitted. In the second embodiment, the two surfaces 30 and 31 can be joined, for example, in the steps shown in FIGS. 6A and 6B. As shown in FIG. 6A, the adhesive 33 is placed in the recess 32 prior to the stacking step. At this time, the adhesive 33 can be held in the recess 32 without flowing out from the recess 32 due to its surface tension. A sufficient amount of adhesive 33 to leak out of the recess 32 when the two surfaces 30 and 31 are overlapped can be placed in the recess 32. Next, as shown in FIG. 6B, the surface 31 is superposed on the surface 30 so as to cover the recess 32. As a result, the adhesive 33 in the recess 32 is pressed. The adhesive 33 leaks out of the recess 32 and is spread between the surfaces 30 and 31. When the adhesive 33 is cured, the surfaces 30 and 31 are fixed to each other. In this way, the surfaces 30 and 31 can be joined in close contact with each other by the adhesive 33. The amount of adhesive 33 may be adjusted to obtain the desired adhesive area. In the examples of FIGS. 6A and 6B, the surfaces 30 and 31 are overlapped by relative movement in the vertical direction of the figure (that is, a direction substantially perpendicular to the joint surfaces 30 and 31). However, the surfaces 30 and 31 may be overlapped by sliding movement in the direction along the joint surfaces 30 and 31 (horizontal direction in the figure).

Similar to the first embodiment, in the second embodiment, the adhesive 33 can be used to join the adjacent sound deadening units in close contact with each other at a desired position. Since no joining member such as a holding metal or a pin is required, the number of parts of the sound deadening device can be reduced as compared with the conventional technique. In addition, the man-hours for assembling the muffling device and the assembling time can be shortened. Further, since the adhesive 33 loaded in the recess 32 can be spread out, the work of applying the adhesive 33 is unnecessary. Further, since the two surfaces 30 and 31 can be joined in close contact with each other, the sound reduction performance is not deteriorated due to sound leakage or generation of airflow sound.

Further, loading the adhesive 33 in the recess 32 is advantageous in the following points as compared with the case where the adhesive is applied between the flat surfaces. For example, by loading the adhesive 33 into the recess 32 as shown in FIG. 6B, the following 1. ~ 3. The effect of can be obtained.
1. 1. Since the adhesive 33 comes into contact with the surface 30 in the recess 32, the adhesive area between the adhesive 33 and the surfaces 30 and 31 can be increased. Therefore, the adhesive force can be increased.
2. The cross-sectional area of the adhesive 33 when the adhesive 33 is viewed in the thickness direction (for example, the vertical direction in FIG. 6B) can be increased. Therefore, the strength of the joint portion in the direction along the joint surface after the adhesive 33 is cured (that is, the left-right direction in FIG. 6B) can be increased.
3. 3. The adhesive 33 in the recess 32 can act as a stopper in the direction along the joint surface.

[First modification]
7A-7B show a first modification of the second embodiment. In the first modification, the adhesive (capsular adhesive) 33 contained in the capsule-shaped container 40 made of, for example, a hard or soft resin or metal is arranged in the recess 32. As shown in FIG. 7A, a recess 32 is formed on one surface 30 of the surfaces 30 and 31 arranged opposite to each other, and a portion of the other surface 31 arranged facing the recess 32 is formed. It is flat. As shown in FIG. 7A, the container 40 may be formed so as to protrude from the opening of the recess 32 when it is arranged in the recess 32. Thereby, when the two surfaces 30 and 31 are overlapped with each other, the container 40 can be pressed and destroyed between the two surfaces 30 and 31. As shown in FIG. 7B, the adhesive 33 flowing out of the destroyed container 40 fills the recess 32 and is spread between the two surfaces 30, 31. As described above, in the first modification, the adhesive 33 held in the capsule-shaped container 40 is loaded into the recess 32. Therefore, the adhesive 33 does not flow out from the recess 32 before the stacking process. This facilitates the work for superimposing or positioning the surfaces 30 and 31. Further, depending on the desired bonding area, an amount of the adhesive 33 that greatly exceeds the internal volume of the recess 32 can be used.

8A and 8B show a second modification of the second embodiment. In the second modification, in addition to the configuration of the first modification, a protrusion (for example, a needle-shaped portion) 50 configured to press or pierce the container 40 in the recess 32 is formed on the surface 31. .. Therefore, in the stacking step, the container 40 is destroyed by the protrusion 50, the recess 32 is filled with the adhesive 33, and the adhesive 33 leaks from the recess 32. The leaked adhesive 33 is spread between the surfaces 30 and 31. When the adhesive 33 is cured, the surfaces 30 and 31 are joined to each other.

[Third Embodiment]
Next, the sound deadening device of the third embodiment will be described with reference to FIGS. 9 and 10A to 10B. In the muffling device of the third embodiment, as shown in FIG. 9, a recess 72 is formed in one surface 70 of the surfaces 70 and 71 arranged so as to face each other of the adjacent muffling units, and the other surface 71 is formed with a recess 72. A recess 77 is formed. The two surfaces 70, 71 correspond to the surfaces of the side plates of the adjacent muffling units. The recess 72 and the recess 77 are configured such that their respective openings are arranged so that they are at least partially opposed to each other. The two surfaces 70, 71 are joined to each other via an adhesive arranged in the recesses 72 and 77 facing each other. Further, as shown in FIG. 10A, the third embodiment includes an adhesive 73 contained in a capsule-shaped container 80, which is arranged in one of the recesses 72. In other configurations, the muffling device according to the third embodiment is substantially the same as the muffling device 1000 according to the first embodiment. Therefore, detailed description of the configuration common to the first embodiment will be omitted.

The capsule-shaped container 80 can be sized so as to exceed the total dimensions of the recesses 72 and 77 in the depth direction. As a result, the container 80 can be destroyed in the stacking process. As shown in FIG. 10B, when the surfaces 70 and 71 are overlapped, the container 80 is destroyed between the recess 72 and the recess 77. The adhesive 73 flowing out of the destroyed container 80 fills the recess 72 and 77 and is spread between the two surfaces 70, 71. As described above, in the third embodiment, the adhesive 73 held in the capsule-shaped container 80 can be loaded into the recess 72. Therefore, the adhesive 73 does not flow out from the recess 72 before the stacking process. This facilitates the work for superimposing or positioning the surfaces 70 and 71. Further, depending on the desired bonding area, an amount of the adhesive 73 that greatly exceeds the internal volumes of the recess 72 and the recess 77 can be used. However, the adhesive 73 may be placed in the recess 72 without being previously housed in the container 80. Further, the recess 77 may be provided with a protrusion configured so that the container 80 can be pressed or drilled.

Similar to the first embodiment, in the third embodiment, the two surfaces 70 and 71 can be joined in close contact with each other by using the adhesive 73. Since no joining member such as a holding metal or a pin is required, the number of parts of the sound deadening device can be reduced as compared with the conventional technique. In addition, the man-hours for assembling the silencer and the assembling time can be shortened. Further, since the adhesive 73 loaded in the recess 72 can be spread out, the work of applying the adhesive 73 is unnecessary. Further, since the two surfaces 70 and 71 can be joined in close contact with each other, the sound reduction performance is not deteriorated due to sound leakage or generation of airflow sound.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described with reference to FIGS. 11A to 13. FIG. 11A is a perspective view showing a joint portion of adjacent muffling units 100A used in the muffling device of the fourth embodiment. As an example, the joint surface is the outer surface of the side plate 101. 11B is a side view of FIG. 11A. The muffling device of the fourth embodiment is substantially the same as that of the first embodiment except for the configuration of the joint portion shown in the drawing. Therefore, detailed description of the configuration common to the first embodiment will be omitted.

In the sound deadening device of the fourth embodiment, the joint portion is configured so that an adhesive (not shown) can be loaded between the sound deadening units 100A from the outside of the sound deadening unit 100A after the stacking step. For this purpose, in the fourth embodiment, the recess 332 formed in the side plate 101 to be the joint surface has an opening 332a at the end in the length direction of the side plate 101, which opens toward the outside of the sound deadening unit 100A. is doing.

Specifically, as shown in FIG. 11A, a groove-shaped recess 332 is formed in the side plate 101 of the lower muffling unit 100A of the adjacent muffling units 100A, and the recess 332 is provided with an opening 332a. There is. In the illustrated example, the recess 332 substantially extends in the length direction (in other words, the airflow direction) of the side plate 101. The opening 332a is formed so as to open toward the outside of the muffling unit 100A (in the illustrated example, the side on which the end plate 103 is arranged) in a state where the side plates 101 of the adjacent muffling units are overlapped. .. According to this configuration, after the upper and lower side plates 101 are overlapped with each other, the adhesive can be injected or filled into the recess 332 by an appropriate means (not shown) through the opening 332a. Therefore, after the side plates 101 are once overlapped, the position of the sound deadening unit 100A can be finely adjusted before joining with the adhesive. Further, since the adhesive can be loaded after the laminating step, a liquid adhesive having a low viscosity can be used as the adhesive. The groove-shaped recess 332 may extend in the width direction of the side plate 101 (in other words, in the direction across the air flow). Further, the recess 332 does not necessarily have to form a groove such as a dot shape.

12A and 12B show other examples of the joint in the fourth embodiment. In this example, as in FIG. 11A, a groove-shaped recess 332 is formed. However, as shown in FIG. 12A, the recess 332 continuously extends in the length direction and the width direction of the side plate 101. By including a portion extending in the width direction of the side plate 101 (in other words, a direction crossing the airflow direction), the airtightness of this portion can be improved. Therefore, it is possible to prevent the generation of undesired airflow sound and the transmission of sound waves, so that it is possible to prevent the sound reduction performance of the silencer from being deteriorated. In the illustrated example, in addition to the opening 332a in the length direction of the side plate 101, the opening 332a in the width direction of the side plate 101 is also formed. The opening 332a in the width direction is formed so as to open toward the side of the muffling unit 100A in a state where adjacent muffling units 100A are overlapped with each other. However, the opening 332a in the width direction of the side plate 101 does not necessarily have to be formed. Alternatively, according to the procedure for assembling the sound deadening device, only the opening 332a in the width direction of the side plate 101 may be formed, and the opening 332a in the length direction may not be formed.

In the example of FIGS. 11A to 12B, the recess 333 is formed at a position facing the recess 332, and the recess 333 has an opening 333a similar to the opening 332a of the groove 332. However, the recesses 332 and 333 may be formed only on one of the side plates 101 facing each other.

Further, in the examples of FIGS. 11A to 12B, the recesses 332 and 333 are formed on the upper surface or the lower surface of the sound deadening unit 100A. However, the recesses 332 and 333 may be formed on the side surface of the muffling unit 100A. In FIG. 13, the groove-shaped recess 332 extends to the side surface of the muffling unit 100A. As a result, it is possible to prevent the generation of airflow sound and the transmission of sound waves on the side surface of the sound deadening unit 100A, so that it is possible to prevent deterioration of sound reduction performance.

[Fifth Embodiment]
According to the fifth embodiment of the present invention, it is possible to provide a muffling device including a plurality of muffling units arranged adjacent to each other and a casing accommodating them. A recess is formed on at least one of the inner surface of the casing and the outer surface of the muffling unit arranged opposite to the inner surface of the casing. The inner surface of the casing and the outer surface of the sound deadening unit are joined to each other via an adhesive placed in the recess.

14A and 14B are a cross-sectional view and a side view of the silencer 1000A of the fifth embodiment, respectively. The muffling device 1000A includes a plurality of (four in the illustrated example) muffling units 100 and a casing 500. 14A and 14B show an example in which the recess 501 is formed on the inner surface of the casing 500. The portion of the outer surface of the sound deadening unit 100 facing the inner surface of the casing 500 is flat. In the side view of FIG. 14B, the position of the recess 501 is indicated by a broken line. FIG. 14A is a cross-sectional arrow view taken along line B1-B1 of FIG. 14B. In this example, the recess 501 has a hemispherical shape.

As the muffling unit 100 used in the fifth embodiment, the muffling unit of each of the above embodiments or the conventional muffling unit can be appropriately used. In the present embodiment, a plurality of sound deadening units 100 are installed and used together with the casing 500 in the air passage of the ventilation equipment.

15A and 15B are views corresponding to FIGS. 14A and 14B, showing an example in which a groove-shaped recess 1501 extending in the airflow direction is formed on the inner surface of the casing 500 instead of the hemispherical recess 501. be.

In addition to the configurations of FIGS. 15A and 15B, FIG. 16 shows an example in which a recess 232 is formed in a portion of the side plate 101 of the sound deadening unit 100 that is arranged so as to face the recess 1501. The recess 232 has the form of a groove extending in the airflow direction as shown in FIG. 4C. However, both the casing 500 and the side plate 101 may be arranged in dots as shown in FIG. 14B, and recesses facing each other may be formed. In the example shown in FIG. 16, since recesses 232 are formed on each side surface of the sound deadening unit 100, not only the sound deadening unit 100 and the casing 500 but also adjacent sound deadening units 100 can be joined by the adhesive of the recesses 232. can.

In the example shown in FIG. 17, the recess 232 is formed only in the side plate 101 of the sound deadening unit 100. In the example of FIG. 17, recesses 232 are formed on each side surface of the muffling unit 100. Therefore, not only the muffling unit 100 and the casing 500 but also the adjacent muffling units 100 can be joined by the adhesive of the recess 232.

In each cross-sectional view of the fifth embodiment, the sound absorbing material arranged outside the air flow path P is not shown.

The joining method between the muffling units described in the first to fourth embodiments can be appropriately used for joining the muffling unit 100 and the casing 500 of the fifth embodiment. Further, in the fifth embodiment, the recesses 501, 1501 and 232 formed in the casing 500 and / or the muffling unit 100 are directed toward the outside of the muffling device 1000A with the casing 500 and the muffling unit 100 positioned with each other. It can have a communicable opening. Such openings can be formed according to the examples shown in FIGS. 11A-13. Thereby, after positioning the casing 500 and the sound deadening unit 100, the adhesive can be injected or filled into the recess through the opening.

Further, the casing 500 may have a through hole penetrating the wall of the casing 500 so as to open in the recesses 501, 1501 and 232 formed in the casing 500 and / or the sound deadening unit 100.

In each of the above embodiments, an example in which the muffling unit is arranged horizontally (in other words, arranged so that the airflow direction is held horizontally) has been described. However, this does not limit the embodiments of the present invention. Each embodiment of the present invention can also be applied to a muffling device including a muffling unit 400 arranged vertically as shown in FIG. In this case, as shown in FIG. 18, the airflow flow path P of the muffling unit 400 is arranged so as to extend in the vertical direction (in other words, is arranged in series in the direction of the airflow flow path P). The joint surface is the outer surface of the end plate 403 attached to both ends of the side plate 401 in the length direction. For example, a hemispherical recess 432 can be formed in the end plate 403 of the lower muffling unit 400, and a convex portion 433 that can be inserted into the recess 432 can be formed in the end plate 403 of the upper muffling unit 400. Each of the above embodiments in which the joint surface is a side plate can be appropriately applied to the end plate 403.

[others]
In each of the above embodiments, a cell type muffling unit has been described as an example of the muffling unit. However, according to another embodiment of the present invention, the muffling unit may be a splitter type muffling unit. The splitter type muffling unit is a muffling unit in which a part of the air flow path is surrounded only by an outer plate (specifically, a side plate). FIG. 19 shows a conventional splitter type muffling unit 200. FIG. 19 shows that the air flow path P of the muffling unit 200 is surrounded by the side plate 201 and the perforated plate 202. Similar to the sound deadening unit 100 of FIG. 1, a sound absorbing material (not shown) is arranged in the space between the perforated plate 202 and the side plate 201 outside the air flow flow path P, and the space is closed by the end plate 203. A recess can be formed in the side plate 201 or the end plate 203, and the adjacent sound deadening units 200 can be joined with an adhesive arranged in the recess. Further, a recess can be formed on the inner surface of the casing accommodating the plurality of sound deadening units 200 and at least one of the side plates 201 of the sound deadening unit 200, and the casing and the sound deadening unit 200 can be joined by an adhesive arranged in the recess. ..

In each embodiment of the present invention, various adhesives can be used as the adhesive arranged in the recess, but it is particularly preferable to use a heat-resistant and / or high-viscosity adhesive. The heat-resistant adhesive is preferable because it can cope with the case where the temperature of the airflow passing through the sound deadening unit is high or the high heat is transmitted to the sound deadening unit from the outside. For example, in the use of ventilation equipment for road tunnels, it is a condition of use that the muffling unit can withstand the surrounding environment up to 100 ° C. Therefore, an adhesive having a heat resistant temperature of more than 100 ° C., preferably a heat resistant temperature of 150 ° C. or higher, and more preferably 200 ° C. or higher can be used. Examples of the adhesive having such heat resistance include silicone-based adhesives, acrylic-based adhesives, epoxy-based adhesives, and the like. In particular, epoxy-based adhesives and acrylic-based adhesives can be preferably used because they are excellent in adhesiveness between metals.

As the high-viscosity adhesive, an adhesive having a viscosity of preferably about 50 Pa · s or more, more preferably 100 Pa · s or more can be used. Examples of such adhesives include epoxy adhesives, acrylic adhesives, silicone adhesives and the like. When the adhesive is arranged between the recesses as in the third embodiment, the adhesive loaded in the recesses on one surface retains its shape until it contacts the recesses on the other surface. It needs to be held to some extent. Therefore, it is preferable to use an adhesive having a viscosity of 100 Pa · s or more. When the adhesive is arranged between the concave portion and the flat surface, it is preferable to use an adhesive having a viscosity of about 50 Pa · s or more. However, when the adhesive is contained in a capsule container, the adhesive does not necessarily have to be a high viscosity adhesive. The viscosity of the adhesive used in the embodiment of the present invention is a value measured by, for example, a single cylindrical rotational viscometer by the measuring method specified in JIS K 6833-1.

As an adhesive having desired heat resistance and high viscosity, a silicone-based adhesive, an acrylic-based adhesive, an epoxy-based adhesive, or the like can be appropriately blended and used.

In the embodiment of the present invention, it is not necessary that all the joining surfaces of the sound deadening unit are joined with an adhesive. In addition to the bonding by the adhesive, the bonding by other conventional methods may be performed. Further, the adhesive may be applied not only to the concave portion but also to a portion other than the concave portion. In addition, an adhesive having a property of gradually increasing the adhesive strength can be used in order to take a sufficient time to position the joint surfaces.

Further, in each embodiment of the present invention, the surface of each sound deadening unit may be partially anti-slip processed. The anti-slip processing can be performed, for example, by roughening the surface so as to form fine irregularities, using double-sided tape, attaching an anti-slip material with an adhesive, and the like. The non-slip may be applied to the same surface as the surface on which the adhesive is placed (eg, the top surface of the muffling unit) or to a different surface (eg, the side surface of the muffling unit). The sound deadening unit can be firmly fixed by the non-slip, and the construction quality is improved. Further, when there is a position where the concave portion cannot be formed, the fixing can be strengthened by providing a non-slip at such a position.

As described above, according to each embodiment of the present invention, the joint surfaces can be joined in close contact with each other by using the adhesive arranged in the recess. Since no joining member such as a holding metal or a pin is required, the number of parts of the sound deadening device can be reduced as compared with the conventional technique. In addition, the man-hours for assembling the muffling device and the assembling time can be shortened. Further, since the adhesive loaded in the recess can be spread out, the work of applying the adhesive is unnecessary. Further, since the joint surfaces can be joined in a close contact state, the sound reduction performance does not deteriorate due to sound leakage or generation of airflow noise.

Further, in the embodiment in which the convex portion that can be inserted into the concave portion is provided, the concave portion and the convex portion can function as a mark when aligning the joint surface. Therefore, the positioning work becomes easy. Further, since the concave portion and the convex portion can be engaged with each other, it is possible to provide excellent bonding strength particularly with respect to an external force in the direction along the bonding surface.

Further, in the embodiment in which the sound deadening device is provided with an opening that opens to the outside in the assembled state, the adhesive can be loaded into the recess through the opening after assembly, so that the positioning work becomes easy.

Although the embodiments of the present invention have been described above based on some examples, the above-described embodiments of the present invention are for facilitating the understanding of the present invention and do not limit the present invention. .. The present invention can be modified and improved without departing from the spirit thereof, and it goes without saying that the present invention includes an equivalent thereof. In addition, any combination or omission of the claims and the components described in the specification is possible within the range in which at least a part of the above-mentioned problems can be solved, or in the range in which at least a part of the effect is exhibited. Is.

The present invention includes the following embodiments.
1. 1. A muffling device having a plurality of muffling units having an air flow path inside.
A sound deadening device in which a recess is formed on at least one of two surfaces of a plurality of sound deadening units arranged in parallel in the horizontal direction with respect to the air flow path and arranged so as to face each other, and an adhesive is arranged in the recess. ..
2. A muffling device having a plurality of muffling units having an air flow path inside.
A sound deadening device in which a recess is formed on at least one of two surfaces of a plurality of sound deadening units arranged in series in the direction of an air flow path and arranged opposite to each other, and an adhesive is arranged in the recess.
3. 3. The muffling device according to 1 or 2 above, comprising a capsule-like member for accommodating an adhesive, which is configured to be arranged in a recess.
4. A muffling device including a plurality of muffling units arranged adjacent to each other and a casing accommodating a plurality of muffling units, and a recess is formed on at least one of two surfaces of the casing and the muffling unit arranged opposite to each other. A silencer that is casing and has an adhesive placed in the recess.
5. The muffling device according to 1, 2 or 4 above, wherein the recess forms an opening that can be opened toward the outside of the muffling device in a state where the two surfaces are overlapped with each other.
6. 4. The muffling device according to 4 above, wherein the casing includes a through hole that opens in a recess.
7. The sound deadening device according to any one of 1 to 6 above, wherein the two surfaces are a first surface on which a recess is formed and a second surface including a flat portion arranged facing the recess.
8. The muffling device according to any one of 1 to 6 above, wherein the two surfaces are a first surface on which a recess is formed and a second surface on which a convex portion that can be inserted into the recess is formed.
9. The two surfaces are a first surface on which the recess is formed and a second surface on which the recess is formed, and the opening of the recess on the first surface and the opening of the recess on the second surface are at least partial. The muffling device according to any one of 1 to 6 above, which is arranged so as to face each other.
10. The two surfaces are a first surface on which the recess is formed and a second surface that includes a flat portion arranged facing the recess.
The sound deadening device according to 3 above, wherein the flat portion includes a protrusion formed so that the capsule-shaped member can be pressed or perforated in the recess.
11. The muffling device according to any one of 1 to 10 above, wherein the recess has a groove shape.
12. A method of assembling a muffling device including a plurality of muffling units, which comprises at least partially joining two surfaces of adjacent muffling units arranged opposite to each other.
The joining process is
The process of placing the adhesive in the recesses formed on at least one of the two surfaces,
A method comprising the step of superimposing two surfaces on top of each other.
13. The method according to 12 above, wherein the step of arranging the adhesive in the recess includes a step of arranging a capsule-shaped member containing the adhesive in the recess.
14. Convex parts are formed on the other surface of the two surfaces.
13. The method according to 13 above, wherein the overlapping step includes a step of inserting a convex portion into the concave portion.
15. A method of assembling a muffling device including a plurality of muffling units and a casing accommodating a plurality of muffling units, which comprises at least partially joining two surfaces of the casing and the muffling unit arranged opposite to each other.
The joining process is
The process of placing the adhesive in the recesses formed on at least one of the two surfaces,
A method comprising the step of superimposing two surfaces on top of each other.
16. The recess forms an opening that can be opened toward the outside of the silencer in a state where the two surfaces are overlapped with each other.
The method according to 15 above, wherein the step of arranging the adhesive includes a step of injecting the adhesive into the recess through the opening.
17. The casing contains a through hole that opens into the recess
The method according to 15 above, wherein the step of arranging the adhesive includes a step of injecting the adhesive into the recess through the through hole.
18. A recess is formed on the other surface of the two surfaces.
12. The method of any of 12, 13 and 15-17 above, wherein the overlapping step comprises arranging the openings of the recesses on the two surfaces at least partially facing each other.

The present invention can be widely applied to a muffling device including a plurality of muffling units, or a muffling device including a plurality of muffling units and a casing accommodating them.

P Air flow flow path S Space 30, 31, 70, 71 Surface 32, 72, 77 Recess 33 Adhesive 35 Convex 50 Protrusion 40, 80 Capsule container 100, 100A, 200, 400 Silent unit 101, 201, 401 Side plate 102, 202 Perforated plate 102A Non-shielding part 102B Mounting part 103, 203, 403 End plate 104 Sound absorbing material 132, 232, 332 Recessed part 133, 233 Convex part 333 Recessed part 332a, 333a Opening part 432 Recessed part 433 Convex part 500 Casing 501 Recessed part 1000 , 1000A Silent device 1501 Recess

Claims (6)

A muffling device including a plurality of muffling units in which an airflow channel is formed inside each of them and arranged in parallel in the lateral direction with respect to the airflow channel.
Of the plurality of sound deadening units , a recess is formed on at least one of two surfaces of adjacent sound deadening units arranged opposite to each other, and an adhesive is arranged in the recess .
The two surfaces are a sound deadening device , which is a first surface on which the concave portion is formed and a second surface on which a convex portion that can be inserted into the concave portion is formed. Wherein configured to be disposed in the recess, comprises a capsule-like member for accommodating the adhesive, silencer according to claim 1. The sound deadening device according to claim 1 , wherein the recess forms an opening that can be opened toward the outside of the sound deadening device in a state where the two surfaces are overlapped with each other. The sound deadening device according to any one of claims 1 to 3 , wherein the recess has a groove shape. A method of assembling a muffling device including a plurality of muffling units in which an airflow flow path is formed in each of the airflow channels and arranged in parallel in the lateral direction with respect to the airflow flow path, and the adjacent muffling units face each other. Including the step of joining the two surfaces to be arranged at least partially.
The joining step is
A step of arranging the adhesive in a recess formed on at least one of the two surfaces, and
A step of superimposing the two surfaces together, only including,
A convex portion is formed on the other surface of the two surfaces.
The method including the step of inserting the convex portion into the concave portion. The method according to claim 5 , wherein the step of arranging the adhesive in the recess includes a step of arranging a capsule-shaped member containing the adhesive in the recess.

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