JP7204194B2 - Sound absorbing material inserting device and sound absorbing material inserting method - Google Patents

Description

The present invention relates to a sound absorbing material inserting device and a sound absorbing material inserting method. More specifically, the present invention relates to a sound absorbing material inserting device and a sound absorbing material inserting method for inserting a long sound absorbing material into a hollow portion inside a cylindrical object (cylindrical body) such as a vehicle door seal material.

Conventionally, a vehicle door seal material (also referred to as a "vehicle weatherstrip") is attached along the periphery of a vehicle opening of a door as a movable member and/or a vehicle body as a fixed member ( For example, see Patent Document 1). By closing a door with a vehicle door seal (hereinafter simply referred to as "seal") close to the vehicle opening, the seal is sandwiched between the door and the vehicle body. state.

The sealing material is mainly composed of a rubber material that can be elastically deformed against stress, and is generally configured as a cylindrical body having a hollow portion inside. When the sealing material is sandwiched between the door and the vehicle body, the hollow portion is crushed and the cross-sectional shape is deformed. At this time, a restoring force (repulsive force) acts on the sealing member to return it to its original state where no stress is applied, so that a portion of the crushed sealing member faces the door or the vehicle body. Adhere while maintaining airtightness or watertightness. As a result, water or the like is blocked from flowing between the outside of the vehicle and the inside of the vehicle. That is, the inside of the vehicle is sealed from the outside of the vehicle by the sealing material.

Here, the sealing material is formed into a desired shape by using a well-known resin molding technique such as an extrusion molding technique or a die molding technique (injection molding technique) using a resin raw material whose viscosity is adjusted by heating at a predetermined temperature. . As described above, since the sealing material is formed as an elongated cylindrical body having a hollow portion inside, it is often manufactured particularly by an extrusion molding technique. The rubber material (resin material) used as the resin raw material is selected to be elastically deformable against stress. For example, ethylene-propylene-diene rubber (EPDM) and other thermoplastic elastomers are used. often

In this way, the sealing material can prevent high-pressure car wash water from entering the vehicle interior from the outside of the vehicle, and can prevent fine contaminants other than water, such as dust and dirt, from entering the vehicle interior. . In addition to substances such as water and dust, it also has the function of damping vibrations between the door and the vehicle opening. Thereby, the inside of the vehicle can be kept in a comfortable state.

In recent years, in order to make the space inside the vehicle more comfortable, attempts have been made to further improve the functionality of the sealing material. For example, the development of sealing materials with improved functions to suppress noise and wind noise during vehicle travel is expected.

JP 2012-116451 A

However, imparting a further noise suppression function to the sealing material sometimes causes the following difficulties and problems. For example, if the sealing material itself is made of a sound-absorbing material, problems such as difficulty in processing technology and an increase in raw material cost may occur. On the other hand, when a sound-absorbing material is applied to the sealing material and a sound-absorbing layer is provided, processes for coating and drying are required, which necessitates new manufacturing equipment and lengthens the working time due to the added process. there was a problem. Furthermore, there have been problems such as an increase in manufacturing cost due to these factors.

On the other hand, as a conventionally known sound absorbing material, for example, a porous (or sponge-like) material made of urethane resin is known. Therefore, by inserting a sound absorbing material made of these urethane resins into the hollow portion of the sealing material, sound absorbing properties can be imparted to the sealing material relatively easily.

However, the sound absorbing material itself is elongated, and no technique has been established for inserting it into a hollow portion formed inside a similarly elongated sealing material. In particular, the sealing material varies in shape, size, length, etc., depending on the type of vehicle and the location where it is installed. For this reason, there is no technique for facilitating the work of inserting the sound absorbing material into the hollow portion of the sealing material (cylindrical body), and there have been cases where this has to be done manually. As a result, an excessive work load is imposed on the worker.

Therefore, in view of the above circumstances, the present invention provides a sound absorbing material inserting device capable of quickly inserting a long sound absorbing material into a hollow portion formed inside a cylindrical body such as a sealing material, and a sound absorbing material. The object is to provide an insertion method.

According to the present invention, a sound absorbing material inserting device and a sound absorbing material inserting method that solve the above problems are provided.

[1] A first pipeline having an end connection port connectable to one end portion of a tubular body at one end and an air supply port at the other end, and communicating between the end connection port and the air supply port and a sound absorbing material supply port for supplying sound absorbing material at one end, the sound absorbing material supply port side being inclined at a predetermined inclination angle toward the air supply port side a second tubular body having the other end attached to the first tubular body in a state in which a second tubular body is formed therein and communicates with the first tubular body.

[2] The above-mentioned [1], further comprising an airflow generation unit connected to the air supply port and configured to generate an airflow in the first pipeline from the air supply port toward the end connection port at a predetermined air pressure. ] The sound absorbing material inserting device according to the above.

[3] The sound absorbing material inserting device according to [2], wherein the air pressure of the airflow generated by the airflow generating section is in the range of 25 kPa to 75 kPa.

[4] Any one of [1] to [3], wherein the inclination angle between the longitudinal direction of the first tubular body and the longitudinal direction of the second tubular body is in the range of 5° to 30°. sound absorbing material insertion device.

[5] The sound absorbing material inserting device according to any one of [1] to [4], wherein the cylindrical body is a vehicle door seal material.

[6] The sound absorbing material inserting device according to any one of [1] to [5], wherein the sound absorbing material is mainly made of urethane resin.

[7] A sound absorbing material inserting method using the sound absorbing material inserting device according to any one of [1] to [6], comprising: a one end connecting step of connecting the one end to the second tubular body, inserting the tip of the elongated sound absorbing material from the sound absorbing material supply port of the second tubular body of the sound absorbing material inserting device, passes through the second pipeline formed in the second pipeline and the connection part of the first pipeline formed inside the first tubular body, and the tip of the sound absorbing material is the first pipe an airflow generation step of generating an airflow in the first pipe line by an airflow generation unit connected to the air supply port; and the airflow generated by the airflow generation step. a sound absorbing material inserting step of conveying the sound absorbing material located in the first pipeline through the end connection port to a hollow portion formed inside the cylindrical body and inserting the sound absorbing material A sound absorbing material inserting method.

[8] The cylindrical body has a terminal hollow opening indicating a ratio of an opening portion to a cross section of the hollow portion at the other end portion on the other end side opposite to the one end portion connected to the end connection port. The sound absorbing material inserting method according to the above [7], wherein the ratio is in the range of 30% to 100%.

[9] The above-described [7] or [8], wherein the tubular body is provided with air vent holes communicating between the hollow portion formed inside the tubular body and the outside at intervals of at least 100 mm. sound absorbing material insertion method.

[10] A sound absorbing material magnification, which indicates the relationship between the cross-sectional area of the hollow portion of the hollow portion, the open rate of the terminal hollow portion, and the cross-sectional area of the sound absorbing material calculated by the following formula (1), is from 0.8 to The method for inserting a sound absorbing material according to [8 ], wherein the range is 1.8 times.
Formula (1) Sound absorbing material magnification = Hollow section cross-sectional area (mm ² ) x Terminal hollow open rate (%) ÷ 100/Sound absorbing material cross-sectional area (mm ² )

According to the sound absorbing material inserting device and the sound absorbing material inserting method of the present invention, the sound absorbing material is inserted from the sound absorbing material supply port by using the sound absorbing material inserting device configured to have the first tubular body and the second tubular body. A long sound absorbing material can be conveyed through the first pipeline and the second pipeline by the force of air, and finally inserted into the hollow portion formed inside the cylindrical body.

As a result, the sound absorbing material having sound absorbing properties can be inserted into the cylindrical body (vehicle door seal material) in a short time with easy work. In particular, by adjusting the inclination angle between the first tubular body and the second tubular body in the sound absorbing material inserting device, the air pressure range, etc., it is possible to convey the sound absorbing material well, and the vehicle with added or improved sound absorbing performance. It is possible to construct a door seal material for a vehicle.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram schematically showing the general configuration of a sound absorbing material inserting device according to an embodiment of the present invention; FIG. 3 is a cross-sectional view schematically showing a state of connection between the sound absorbing material inserting device of the present embodiment and a sealing material into which the sound absorbing material is to be inserted. FIG. 2 is a cross-sectional view showing a schematic configuration of a vehicle door seal material into which a sound absorbing material is inserted; It is a sectional view showing a schematic structure of a vehicle door seal material. FIG. 4 is an explanatory diagram showing a schematic configuration of a cylindrical body provided with an air vent hole; FIG. 2 is an explanatory diagram showing an example of a portion of a hollow cross-sectional area in a vehicle door seal material; FIG. 3 is an explanatory diagram showing an example of a cross-sectional area of a hollow portion of a vehicle door seal material and a cross-sectional area of a sound absorbing material of a sound absorbing material; FIG. 3 is a cross-sectional view showing another configuration of the vehicle door seal material.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a sound absorbing material inserting device and a sound absorbing material inserting method of the present invention will be described with reference to the drawings. It should be noted that the sound absorbing material inserting device and sound absorbing material inserting method of the present invention are not limited to the following embodiments, and various design changes, modifications, improvements, etc., can be made without departing from the scope of the present invention. It can be added.

1. Sound Absorbing Material Inserting Device A sound absorbing material inserting device 1 of one embodiment of the present invention, as schematically shown in FIGS. A second pipe line 4 is formed inside, and a part of the first pipe body 3 and a second pipe body 5 connected at one end are mainly provided. Here, FIG. 1 is an explanatory diagram schematically showing the general configuration of the sound absorbing material inserting device 1 of the present embodiment, and FIG. 6 is a cross-sectional view schematically showing a state of connection with the sealing member 6; FIG.

Here, in the sound absorbing material inserting device 1 of the present embodiment, the sealing material 6 (vehicle door sealing material) into which the sound absorbing material 8 is inserted corresponds to the tubular body in the present invention. As the sound absorbing material 8, a long sponge-like material made mainly of urethane resin is used. By inserting the sound absorbing material 8 into the hollow portion 7 of the sealing material 6, the sealing material 6 with high sound absorbing performance can be manufactured. In addition, the sound absorbing material 8 is not limited to those having the above urethane resin as a main raw material. acrylate rubber), EPDM/FKM (ethylene propylene diene rubber/fluororubber), PE/EVA (polyethylene/ethylene vinyl acetate), PE/TPS (polyethylene/styrene thermoplastic elastomer), HDPE/LDPE (high density polyethylene/ Various raw materials can be used such as low density polyethylene), and MF (melamine resin).

Furthermore, to explain the specific configuration of the sound absorbing material inserting device 1 of the present embodiment, the first tubular body 3 has an end connection port 9 that can be connected to one end 6a of the sealing material 6 on one end side. An air supply port 10 is provided on the end side. That is, the above-described first pipe line 2 is formed so as to communicate between the end connection port 9 and the air supply port 10 . Also, the end connection port 9 can be connected to the hollow portion 7 opened at one end 6 a of the sealing material 6 . As shown in FIG. 1 and the like, the first tubular body 3 has a substantially straight tubular shape with the first pipeline 2 inside.

Although the tubular shape of the first tubular body 3 and the cross-sectional shape of the first tubular passage 2 are not particularly limited, they can be circular or elliptical, for example. In particular, by making the cross section of the first pipeline 2 circular or the like, the flow of the airflow W generated by the airflow generation unit 11 described later is not disturbed, and the flow of the airflow W passing through the first pipeline 2 is sealed. The movement of the sound absorbing material 8 inserted into the material 6 becomes smooth. Therefore, the possibility that the sound absorbing material 8 stops in the middle of the hollow portion 7 of the first pipe line 2 or the sealing material 6 is less likely to occur.

On the other hand, the second tubular body 5 has a sound absorbing material supply port 12 for supplying the long sound absorbing material 8 at one end side, and the one end side provided with the sound absorbing material supply port 12 is connected to the first pipe body. The second pipe line 4 is attached to the first pipe body 3 at the other end side in a state inclined at a predetermined tilt angle θ toward the air supply port 10 side of 3, and communicates with the first pipe line 2. formed inside. The second tubular body 5 has a substantially straight tubular shape with the second tubular body 5 inside, as shown in FIG. 1 and the like. The pipe shape of the second pipe 5 and the cross-sectional pipe shape of the second pipe 4 are not particularly limited. good.

That is, in the sound absorbing material inserting device of the present embodiment, the substantially straight second tubular body 5 is placed at a substantially intermediate position of the substantially straight first tubular body 3 , obliquely with respect to the longitudinal direction of the first tubular body 3 . It is installed in an inclined state. Therefore, the whole is presenting a substantially Y shape.

Furthermore, the first pipeline 2 inside the first tubular body 3 and the second pipeline 4 inside the second tubular body 5 are connected respectively (see FIG. 2). That is, one end of the second pipeline 4 is connected to a substantially intermediate position of the first pipeline 2 . Here, the materials forming the first tubular body 3 and the second tubular body 5 are not particularly limited, and known materials such as hard plastic, metal, and wood can be used, for example. A lubricant such as a silicone material may be applied to the wall surfaces of the pipes 2 and 4 to reduce the frictional force with the sound absorbing material 8 . This solves the problem that the insertion of the sound absorbing material 8 is hindered by the frictional force between the pipes 2 and 4 when the sound absorbing material 8 is inserted.

The sound absorbing material inserting device of this embodiment is further connected to the air supply port 10 of the first tubular body 3, and the inside of the first pipe line 2 is supplied with a predetermined air pressure from the air supply port 10 toward the end connection port 9. An airflow generator 11 for generating an airflow W (see FIG. 2) is provided in the airflow. A well-known air pump or the like can be used for the airflow generating section 11 as long as it has a function of discharging compressed air at a predetermined air pressure. As a result, the airflow W can be generated in the first conduit 2 by discharging the compressed air from the airflow generating section 11 .

The air pressure of the compressed air when the airflow W is generated by the airflow generator 11 can be in the range of 25 kPa to 75 kPa. When the air pressure is lower than 25 kPa, there is not enough power to convey the sound absorbing material 8 to the hollow portion 7 of the sealing material 6 via the second pipeline 4 and the first pipeline 2, and There is a possibility that troubles such as stopping the insertion of the sound absorbing material 8 may occur.

On the other hand, when the air pressure is higher than 75 kPa, turbulence occurs in the air flow W in the first pipe line 2 and the hollow portion 7, and the sound absorbing material 8 may violently collide with the inner peripheral surfaces of the first pipe line 2 and the hollow portion 7. Therefore, it may be difficult to insert the sound absorbing material 8 quickly. Therefore, by setting the air pressure within the above range, the long sound absorbing material 8 can be stably inserted into the hollow portion 7 .

In the sound absorbing material inserting device 1 of this embodiment, the inclination angle θ between the longitudinal direction of the first tubular body 3 and the longitudinal direction of the second tubular body 5 is set in the range of 5° to 30°. Here, when the inclination angle θ is smaller than 5°, the first tubular body 3 and the second tubular body 5 are attached to each other in a substantially parallel state. The sound absorbing material 8 cannot be sufficiently conveyed to the hollow portion 7 by the airflow W generated toward the sound absorbing member 9 .

On the other hand, when the inclination angle θ exceeds 30°, the flexible sound absorbing material 8 bends greatly at the intersection of the first pipeline 2 and the second pipeline 4 . Therefore, the bending portion of the sound absorbing material 8 hinders the prompt supply of the sound absorbing material 8 and the insertion of the sealing material 6 into the hollow portion 7 . Therefore, the inclination angle θ between the first tubular body 3 and the second tubular body 5 is set within the above range.

As described above, the sound absorbing material inserting device 1 of the present embodiment can be constructed with a relatively simple configuration. Then, the airflow W generated in the first pipe line 2 by the airflow generation unit 11 passes through the first pipe line 2 and flows through the hollow of the sealing material 6 connected to the end connection port 9 of the first pipe body 3 . Part 7 is reached. At this time, part of the elongated sound absorbing material 8 supplied from the sound absorbing material supply port 12 of the second tubular body 5 is inserted up to the first pipe line 2, so that the sealing material 6 is supplied with the airflow W. It is conveyed toward, passes through the end connection port 9 of the first tubular body 3 and one end portion 6a of the sealing member 6, and finally reaches the hollow portion 7 of the sealing member 6 (see FIG. 3). Here, FIG. 3 is a cross-sectional view of the sealing material 6 viewed from the longitudinal direction, showing a schematic configuration of the sealing material 6 into which the sound absorbing material 8 is inserted.

Thus, the sound absorbing material inserting device 1 of the present embodiment can significantly shorten and simplify the time required for the work of inserting the sound absorbing material 8 into the sealing material 6 (cylindrical body). The details of the insertion of the sound absorbing material 8 into the sealing material 6 will be described later in the method of inserting the sound absorbing material, so the description thereof will be omitted here.

2. Sealing material The sealing material 6 into which the sound absorbing material 8 is inserted is not particularly limited, and can be exemplified by a well-known vehicle door sealing material (cylindrical body) installed in a vehicle opening of an automobile or the like. . Here, FIG. 4 is a cross-sectional view showing an example of a schematic configuration of the sealing material 6. As shown in FIG. As shown in FIG. 4, the sealing material 6 into which the sound absorbing material 8 is inserted by the sound absorbing material inserting device 1 of the present embodiment has two hollow portions 7 and 7a of different sizes formed therein, and the seal member 6 has two different sizes. A lip portion 14 projecting outward from a portion of the outer peripheral surface 13 of the member 6 is provided. Here, FIG. 4 is a cross-sectional view of the sealing material 6 as viewed in a direction orthogonal to the longitudinal direction. In addition, in the sound absorbing material inserting device 1 and the sound absorbing material inserting method of the present embodiment, an example in which the sound absorbing material 8 is inserted into the hollow portion 7 located in the upper portion is exemplified.

Furthermore, the sealing material 6 may have a terminal hollow open rate R of 30% to 100% on the side of the other end 6b opposite to the one end 6a connected to the end connection port 9. FIG. Here, the terminal hollow opening rate R indicates the ratio of the openings to the cross section of the hollow section 7 (hollow section cross-sectional area S1: see FIG. 5). That is, when the terminal hollow open rate R is 100%, the other end 6b of the sealing material 6 is completely open, and the airflow generated by the airflow generating part 11 is generated at the other end 6b (see FIG. 4). All of the arriving airflow W is released to the outside. On the other hand, when the terminal hollow opening ratio R is 0%, the other end 6b of the sealing material 6 is completely closed (not shown), and the airflow W cannot proceed from the other end 6b. .

Further, the seal member 6 may be provided with air vent holes 16 at intervals of at least 100 mm for communicating the hollow portion 7 inside the seal member 6 with the outside (see FIG. 6). Since the airflow W that has reached the hollow portion 7 of the sealing member 6 is discharged to the outside through the air vent hole 16, the pressure in the hollow portion 7 does not increase. When the pressure in the hollow portion 7 becomes excessively high, the sound absorbing material 8 may not be quickly inserted. Therefore, by providing the air vent holes 16 at predetermined intervals, it is possible to suppress the occurrence of improper insertion of the sound absorbing material 8 or the like.

Furthermore, the sound absorbing material magnification, which indicates the relationship between the hollow section cross-sectional area S1 of the hollow section 7, the terminal hollow open rate R described above, and the sound absorbing material cross-sectional area S2 of the sound absorbing material 8 (see FIG. 7), is 0.8 to 1.0. It may be in the range of 8 times. Here, the sound absorbing material magnification is calculated by the following formula (1).
Formula (1) Sound-absorbing material magnification = Hollow section cross-sectional area S1 (mm ² ) x Terminal hollow open rate R (%)/100/Sound-absorbing material cross-sectional area S2 (mm ² )

Here, in inserting the sound absorbing material 8 into the hollow part 7, in order to perform good insertion, it is necessary to consider the relationship between the hollow part cross-sectional area S1 of the hollow part 7 and the sound absorbing material cross-sectional area S2 of the sound absorbing material 8. (see FIG. 7). In addition, the value of the above-described terminal hollow open rate R (%) is also a factor for good insertion. When the terminal hollow opening rate R (%) is 100%, that is, when the other end 6b of the sealing material 6 is completely opened, the hollow cross-sectional area S1 and cross-sectional shape of the hollow part 7 If the cross-sectional area S2 and the cross-sectional shape of the sound absorbing material are substantially the same, there is almost no gap between the inner surface (not shown) of the hollow portion 7 and the outer surface (not shown) of the sound absorbing material 8, so the force of the airflow W is sufficient. Therefore, it is not possible to insert the sound absorbing material 8 in such a manner. In addition, the insertion of the sound absorbing material 8 also changes depending on the sound absorbing material magnification, which takes into account the degree of opening of the hollow portion 7 at the other end portion 6b of the sealing material 6 indicated by the terminal hollow open rate R (%).

Therefore, the sound absorbing material magnification is calculated by the above equation (1), and the range in which the sound absorbing material 8 can be inserted into the sealing material 6 can be determined. When the sound absorbing material magnification is included in the specified numerical range, the sound absorbing material 8 can be satisfactorily inserted into the sealing material 6 .

3. Sound Absorbing Material Inserting Method A sound absorbing material inserting method (not shown) according to an embodiment of the present invention uses the sound absorbing material inserting device 1 described above, and the end connection port of the first tubular body 3 of the sound absorbing material inserting device 1 is 9 and one end portion 6a of the sealing material 6 (cylindrical body); Insert the tip part 8a of, pass through the second pipeline 4 formed inside the second tubular body 5, and the first pipeline 2 formed inside the second pipeline 4 and the first tubular body 3 Beyond the connection part 15 of the sound absorbing material setting step of setting the tip part 8a to the first pipe line 2, and the airflow generation part 11 connected to the air supply port 10, the airflow to the first pipe line 2 and the generated airflow W passes through the sound absorbing material 8 (tip 8a of the sound absorbing material 8) located in the first pipe line 2 through the end connection port 9 and into the seal material 6. and a sound absorbing material inserting step of conveying the sound absorbing material 8 to the hollow portion 7 formed in the hollow portion 7 and inserting the sound absorbing material 8 thereinto.

That is, according to the sound absorbing material inserting method of the present embodiment, by using the sound absorbing material inserting device 1 and the sealing material 6 which have already been described, the elongated sealing material 6 can be easily inserted in a short time unlike the conventional method. can do.

The apparatus for inserting a sound absorbing material and the method for inserting a sound absorbing material according to the present invention will be described below based on the following examples, but the manufacturing method of the present invention is not limited to these examples.

In this embodiment, the inclination angle θ between the first tubular body 3 and the second tubular body 5 in the sound absorbing material inserting device 1, the air pressure by the air flow generating part 11, the interval (pitch) of the air vent holes, and the end hollow open rate (%) and a parameter related to the sound absorbing material magnification, an insertion test of the sound absorbing material 8 was performed to confirm whether the sound absorbing material 8 was inserted into the sealing material 6 properly.

(1) Basic Parameters and Types of Seal Materials In the insertion test of the sound absorbing material 8, the following basic parameters were set except the parameters to be evaluated. Furthermore, in the insertion test of the sound absorbing material 8, two types of sealing materials 6 and 6c having different cross-sectional shapes were used. Specifically, the sealing member 6 having the cross-sectional shape shown in FIG. 4 (hereinafter referred to as “sealing material A”) and the sealing member 6c having the cross-sectional shape shown in FIG. ) were used to evaluate the insertability of the sound absorbing material 8 . The sealant A has a larger cross-sectional area S1 of the hollow portion than the sealant B. As shown in FIG.

Here, the details of the basic parameters will be described. The air pressure for generating the airflow W is 50 kPa, the interval P between the air vent holes provided in the sealing member 6 and the hole diameter of the air vent hole 16 are 300 mm and φ3, and the end hollow open ratio is "100%". The length of the sealing material used (sealing material length (not shown)) was set to 2000 mm, and the length of the sound absorbing material to be inserted (sound absorbing material length (not shown)) was set to 2000 mm. Here, as the sound absorbing material 8, an elongated material made of urethane resin, which is a porous material, is used.

(2) Evaluation of insertion of sound absorbing material The method of evaluating the insertion of the sound absorbing material 8 into the sealing material 6 is as follows. On the other hand, the sound absorbing material 8 having the specified sound absorbing material length is inserted into the second pipe 4 or the first pipe 2 of the sound absorbing material inserting device 1 or the hollow part 7 of the sealing material 6. When the front end portion 8a of the sound absorbing material 8 did not reach the other end portion 6b of the sealing material 6 because the sound absorbing material 8 was bent in the hollow portion 7 or the like, it was judged as "C". Furthermore, when the front end portion 8a of the sound absorbing material 8 reaches the other end portion 6b of the sealing material 6, but it takes more time to insert it than in the case of "A" (specifically, when compared with "A", The case where it took about twice as long to complete the process) was judged as "B".

(3) Evaluation of Inclination Angle θ The inclination angle θ between the first tubular body 3 and the second tubular body 5 of the sound absorbing material insertion device 1 was changed from 0° to 45°, An insertion test of the sound absorbing material 8 for B) was performed. In other words, the "insertion angle of the sound absorbing material" was verified. Except for the inclination angle θ, the above basic parameters were set. The results are shown in Table 1 below.

According to this, when the inclination angle .theta. On the other hand, it was confirmed that if the inclination angle θ is 5° or more, the sound absorbing material can be inserted satisfactorily. However, when the inclination angle .theta. In addition, no particular significance was observed due to the difference in the cross-sectional shape of the sealing materials A and B. Therefore, it was shown that the inclination angle θ in the range of 5° to 45°, particularly the inclination angle θ in the range of 5° to 30° is preferable.

(4) Evaluation of air pressure In order to generate an airflow in the first tubular body, the air pressure supplied to the air supply port of the first tubular body by the airflow generating part was changed in the range of 0 kPa to 125 kPa, and the sealing material A was tested. , and B were tested for inserting the sound absorbing material. Except for the air pressure, the above basic parameters were set. The results are shown in Table 2 below.

According to this, it was confirmed that the sound absorbing material can be inserted in the sealing material A when the air pressure is in the range of 15 kPa to 100 kPa. shown. On the other hand, with seal material B, it was confirmed that the sound absorbing material can be inserted when the air pressure is in the range of 5 kPa to 75 kPa. rice field. It was shown that the sealing material A with the large hollow section cross-sectional area S1 needs to be supplied with a higher air pressure. Therefore, it was shown that an air pressure in the range of 15 kPa to 75 kPa, particularly an air pressure in the range of 25 kPa to 75 kPa is suitable.

(5) Evaluation of Air Vent Hole Interval (Pitch) and Evaluation of End Hollow Open Ratio The air vent hole interval P and the end hollow open ratio (%) were also evaluated. The interval P between the air vent holes was evaluated using only the sealing material B. As shown in FIG. Here, the interval between the air vent holes is changed between 10 mm and 2000 mm and under the condition of no air vent hole, while the terminal hollow open rate R (%) is changed in the range of 0% to 100% to absorb sound. A material insertion test was performed. The above basic parameters were set except for the air vent hole interval P and the terminal hollow open rate R (%). Table 3 shows the results. Furthermore, a sound absorbing material insertion test was performed on the sealing materials A and B while changing the end hollow open ratio R (%) in the range of 0% to 50%. Table 4 shows the results.

According to this, it was shown that the sound absorbing material could not be inserted satisfactorily at the terminal hollow open rate R (%) of 0% and 10%. Furthermore, it was shown that the sound absorbing material could not be inserted satisfactorily when the interval P between the air vent holes was 10 mm and 50 mm. That is, it was confirmed that the other end portion of the sealing material had a terminal hollow open rate R (%) of at least 30% or more. When the terminal hollow opening ratio R (%) is less than 30%, the airflow W generated by the airflow generating portion cannot sufficiently escape from the hollow portion of the sealing material toward the outside, which hinders the insertion of the sound absorbing material. it is conceivable that.

On the other hand, when the interval P between the air vent holes is too short, such as 10 mm or 50 mm, an air flow W is emitted from the air vent hole, and sufficient force is applied to convey the tip of the sound absorbing material to the other end of the sealing material. I lose. Therefore, it is necessary that at least the terminal hollow open rate R (%) is 30% or more and the interval between the air vent holes is 100 mm or more, and the terminal hollow open rate R (%) may be 50% or more. more preferred.

As is clear from Table 3 above, it was confirmed that even if the sealing material is not provided with an air vent hole, it is possible to insert a good sound absorbing material if the end hollow open rate is 30% or more. was done. Further, as shown in Table 4, the sealing material A, which has a large hollow cross-sectional area S1, can insert a good sound absorbing material compared to the sealing material B, even if the terminal hollow open rate R (%) is 20%. One thing has been confirmed.

(6) Evaluation of Sound Absorbing Material Magnification By changing the sound absorbing material cross-sectional area of the sound absorbing material to be used, the value of the sound absorbing material magnification calculated by the above formula (1) was changed, and a sound absorbing material insertion test was performed. . Here, the sound absorbing material magnification is calculated based on the hollow part cross-sectional area S1 (mm ² ) of the hollow part, the terminal hollow open rate R (%), and the sound absorbing material cross-sectional area S2 (mm ² ). Table 5 shows the results.

According to this, it was confirmed that the sound absorbing material can be inserted satisfactorily when the sound absorbing material magnification is in the range of 0.8 to 1.8. On the other hand, when it is less than 0.8 and more than 2.0, it was shown that the sound absorbing material could not be inserted satisfactorily. This indicates that there is a correlation between the cross-sectional area S1 of the hollow portion of the sealing material, the terminal hollow open rate R (%), and the cross-sectional area S2 of the sound absorbing material in terms of insertability of the sound absorbing material. rice field.

As described above, according to the sound absorbing material inserting device and the sound absorbing material inserting method of the present embodiment, a long sound absorbing material is inserted into a cylindrical body (sealing material) having a hollow portion along the air flow. It can be inserted quickly. As a result, the work of inserting the sound absorbing material, which has conventionally been difficult, can be made more efficient, and sound absorbing properties can be easily imparted to the sealing material or the like. As a result, by applying it to the manufacture of vehicle door seal materials and the like, it is possible to maintain the comfort of the vehicle interior space during driving.

In addition, each parameter such as the inclination angle θ between the first tubular body and the second tubular body of the sound absorbing material inserting device, air pressure, terminal hollow open rate, air vent hole interval, and sound absorbing material magnification is optimized. Therefore, it is possible to insert the sound absorbing material more satisfactorily.

The apparatus for inserting a sound absorbing material and the method for inserting a sound absorbing material according to the present invention can be applied to cylindrical bodies such as vehicle door seal materials installed on the doors of various vehicles such as passenger cars, industrial vehicles, and agricultural vehicles. It is expected to be used in various industrial technical fields, such as the ability to impart noise suppression functions to vehicle door seal materials and the like.

1: sound absorbing material inserting device, 2: first pipeline, 3: first tubular body, 4: second pipeline, 5: second tubular body, 6, 6c: sealing material (vehicle door sealing material, cylindrical body ), 6a: One end, 6b: Other end, 7, 7a: Hollow part, 8: Sound absorbing material, 8a: Tip part, 9: End connection port, 10: Air supply port, 11: Air flow generation part, 12 : sound absorbing material supply port 13: outer peripheral surface 14: lip portion 15: connecting portion 16: air vent hole P: interval between air vent holes R: terminal hollow opening ratio S1: hollow portion cross-sectional area S2 : cross-sectional area of sound absorbing material, W: airflow, θ: angle of inclination.

Claims (10)

A first conduit having an end connection port connectable to one end portion of the tubular body at one end and an air supply port at the other end and communicating between the end connection port and the air supply port is provided inside. a formed first tubular body;
One end has a sound absorbing material supply port for supplying sound absorbing material, and the sound absorbing material supply port side is inclined at a predetermined angle toward the air supply port side, and the other end is attached to the first tubular body. A sound absorbing material inserting device, comprising: a second tubular body in which a second pipeline communicating with the first pipeline is formed. 2. The sound absorbing device according to claim 1, further comprising an airflow generating part connected to said air supply port and configured to generate an airflow in said first pipeline from said air supply port toward said end connection port at a predetermined air pressure. Material insertion device. The air pressure of the airflow generated by the airflow generation unit is
3. The device for inserting sound absorbing material according to claim 2, wherein the range is from 25 kPa to 75 kPa. The inclination angle between the longitudinal direction of the first tubular body and the longitudinal direction of the second tubular body is
The device for inserting a sound absorbing material according to any one of claims 1 to 3, wherein the range is 5° to 30°. The cylindrical body is
The sound absorbing material inserting device according to any one of claims 1 to 4, which is a vehicle door seal material. The sound absorbing material is
The sound absorbing material inserting device according to any one of claims 1 to 5, which is formed using urethane resin as a main raw material. A sound absorbing material inserting method using the sound absorbing material inserting device according to any one of claims 1 to 6,
a one end connection step of connecting the end connection port of the first tubular body of the sound absorbing material inserting device and one end of the tubular body;
A tip portion of an elongated sound absorbing material is inserted from the sound absorbing material supply port of the second tubular body of the sound absorbing material inserting device, passes through the second pipe line formed inside the second tubular body, and A sound absorbing material setting step of setting a sound absorbing material at a position where the tip of the sound absorbing material reaches the first pipe line beyond the connecting portion of the second pipe line and the first pipe line formed inside the first pipe body;
an airflow generation step of generating an airflow in the first pipeline by an airflow generation unit connected to the air supply port;
The sound absorbing material positioned in the first pipeline is conveyed together with the air flow generated in the air flow generation step through the end connection port to a hollow portion formed inside the cylindrical body, and the sound absorbing material is A sound absorbing material inserting step of inserting the sound absorbing material. The cylindrical body is
A terminal hollow opening ratio indicating a ratio of an opening to a cross section of the hollow portion at the other end on the other end side opposite to the one end connected to the end connection port is 30% to 100%. 8. The sound absorbing material inserting method according to claim 7, wherein the sound absorbing material is a range. The cylindrical body is
9. The method of inserting a sound absorbing material according to claim 7, wherein air vent holes are provided at intervals of at least 100 mm to communicate between the hollow portion formed inside the cylindrical body and the outside. A sound absorbing material magnification, which indicates the relationship between the hollow cross-sectional area of the hollow part, the open end hollow ratio, and the sound absorbing cross-sectional area of the sound absorbing material calculated by the following formula (1), is 0.8 to 1.8. 9. The sound absorbing material inserting method according to claim 8, wherein the range is double.
Formula (1) Sound absorbing material magnification = Hollow section cross-sectional area (mm ² ) x Terminal hollow open rate (%) ÷ 100/Sound absorbing material cross-sectional area (mm ² )

Images