Soundproof member

Abstract

To effectively prevent a possibility of falling of a cover member while attaining excellent insertion workability of a cylindrical member into the cover member.SOLUTION: A soundproof member 1 comprises a cylindrical member 2 covering a part of an object extending in a front-back direction, and a cover member 3 covering an outside of the cylindrical member 2. The cylindrical member 2 is formed from resin foam and has a first insertion hole 4 penetratingly formed in the front-back direction and allowing the object to be inserted thereinto. The cover member 3 is formed from a resin and has a second insertion hole 6 penetrating in the front-back direction and allowing the cylindrical member 2 to be inserted thereinto. In a state that the object is not penetrated into the cylindrical member 2, gaps 10, 10 extending in the front-back direction are formed between the external surface of the cylindrical member 2 and the internal surface of the cover member 3, and in a state that the object is inserted into the cylindrical member 2, the gaps 10, 10 are closed due to contact between the external surface of the cylindrical member 2 and the internal surface of the cover member 3.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a soundproof member used by being externally attached to a vehicle structure or the like.

Background Art

[0002] A cylindrical soundproof member is externally attached to a vehicle structure (for example, a support member of a vibration generation source such as power or a drive source, or a structural member of a vibration transmission path). This soundproof member has a double structure in which a resin cylindrical member covering an object (structure) and a resin cylindrical cover member covering the outer periphery of the cylindrical member are laminated. As such a laminate, for example, Patent Document 1 discloses a cylindrical laminate formed by inserting a resin tubular body formed by blow molding inside a metal tubular body. Here, a gap is formed between the two so that the parting line formed on the outer peripheral surface of the inner tubular body does not contact the inner peripheral surface of the tubular body, thereby improving the ease of inserting the tubular body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Regarding the soundproof member, if a gap is set between the cylindrical member and the cover member as in Patent Document 1, the workability of inserting the cylindrical member into the cover member becomes good. However, if a gap is provided, the integrality between the cylindrical member and the cover member decreases, so there is a risk that the cover member may fall off from the cylindrical member when attached to the object.

[0005] Therefore, an object of the present disclosure is to provide a soundproof member that can effectively prevent the risk of the cover member from falling off while improving the workability of inserting the cylindrical member into the cover member.

Means for Solving the Problem

[0006] In order to achieve the above object, the present disclosure is a soundproof member including a cylindrical member covering at least a part of an object extending in a predetermined first direction and a cover member covering the outside of the cylindrical member, the cylindrical member is formed of a foamed resin and includes a first cylindrical portion having a first insertion hole formed therethrough in the first direction through which the object can be inserted, the cover member is formed of a resin and includes a second cylindrical portion having a second insertion hole formed therethrough in the first direction through which the first cylindrical portion can be inserted, The outer shape of the region of the object inserted into the first cylindrical portion is formed larger than the first insertion hole. when the object is not inserted into the first cylindrical portion, a gap extending in the first direction is formed between the outer surface of the first cylindrical portion and the inner surface of the second cylindrical portion, when the object is inserted into the first cylindrical portion, When the first cylindrical portion is pushed outwards the outer surface of the first cylindrical portion and the inner surface of the second cylindrical portion come into contact with each other to close the gap the first cylindrical portion is in a compressed state, and the object is held in the first cylindrical portion by the compression reaction force of the first cylindrical portion. which is characterized in that. Another aspect of the present disclosure is that, in the above configuration, the gap penetrates in the first direction when the object is not inserted into the first cylindrical portion, which is characterized in that. Another aspect of the present disclosure is that, in the above configuration, the gap is formed in a pair at point-symmetrical positions centered on the object when viewed in a cross section orthogonal to the first direction, which is characterized in that. Another aspect of the present disclosure is that, in the above configuration, an engaging portion is formed on either the first cylindrical portion or the second cylindrical portion, and an engaged portion with which the engaging portion engages in a state where the first cylindrical portion is inserted into the second cylindrical portion is formed on the other, which is characterized in that. Another aspect of the present disclosure is that, in the above configuration, the object has a protruding portion protruding outward in a region where the object is inserted into the first cylindrical portion, the second cylindrical portion has an engaged portion at a position corresponding to the protruding portion in a state where the first cylindrical portion is inserted and the object is inserted into the first insertion hole, The first cylindrical portion is inserted into the second cylindrical portion, and when the object is inserted into the first insertion hole, it is partially elastically deformed outward by the protruding portion and engaged with the engaged portion.

Advantages of the Invention

[0007] According to the present disclosure, while the workability of inserting the cylindrical member into the cover member is improved due to the gap, the gap is closed after the insertion of the cylindrical member. Since the object is held in the first cylindrical portion by the compression reaction force of the first cylindrical portion, the integrality between the object and the cylindrical member is enhanced. Thus, the risk of the cover member falling off can be effectively prevented. Further, when attached to the object, sound leakage is preferably prevented by the cylindrical member that closes the gap. According to another aspect of the present disclosure, in addition to the above effect, since the gap penetrates in the first direction, the workability of inserting the cylindrical member into the cover member is further improved. According to another aspect of the present disclosure, in addition to the above effect, since the gap is formed in a pair at point-symmetrical positions centered on the object when viewed in a cross-section orthogonal to the first direction, the workability of inserting the cylindrical member into the cover member is further improved. According to another aspect of the present disclosure, in addition to the above effect, an engaging portion is formed on either the first cylindrical portion or the second cylindrical portion, and an engaged portion is formed on the other, so that the integrality between the cylindrical member and the cover member is enhanced, and the cover member can be more effectively prevented from falling off the cylindrical member. According to another aspect of the present disclosure, in addition to the above effect, the object has a protruding portion that protrudes outward, the second cylindrical portion has an engaged portion at a position corresponding to the protruding portion, and when the first cylindrical portion is inserted into the second cylindrical portion and the object is inserted into the first insertion hole, the protruding portion is partially elastically deformed outward and engaged with the engaged portion. Therefore, the protruding portion of the object can be used to prevent the cylindrical member and the cover member from coming off without providing an engaging portion such as an engaging projection on the cylindrical member. Further, since the protruding portion elastically deforms and engages with the cylindrical member, the effect of preventing the object from falling off is also enhanced.

Brief Description of the Drawings

[0008]

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[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. [Form 1] FIG. 1 is a perspective view showing an example of the sound insulation member, FIG. 2 is a plan view, and FIG. 3 is an exploded perspective view. For the sake of convenience of explanation, the front-rear, left-right directions are defined with the lower left side of FIG. 1 being the front and the upper right side being the rear. The sound insulation member 1 includes a cylindrical member 2 and a similarly cylindrical cover member 3, and has a double structure in which the cover member 3 is externally mounted on the cylindrical member 2. The cylindrical member 2 is formed of a foamed resin (for example, urethane) and has a rectangular tube shape extending in the front-rear direction in plan view. The front view of the cylindrical member 2 is a rectangular shape that is long in the left-right direction. The cylindrical member 2 is provided with a first insertion hole 4 penetrating in the front-rear direction. The cross-sectional shape of the first insertion hole 4 is also a rectangular shape that is long in the left-right direction. On the upper surface of the cylindrical member 2, an engaging protrusion 5 having a square shape in plan view that protrudes upward is formed.

[0010] The cover member 3 is formed of resin and has a rectangular tubular shape extending in the front-rear direction in plan view. The front-rear length of the cover member 3 is substantially equal to the front-rear length of the cylindrical member 2. The front view of the cover member 3 is also a rectangular shape that is long in the left-right direction. However, the cover member 3 is formed in a tubular shape that is slightly larger than the cylindrical member 2 and is provided with a second insertion hole 6 penetrating in the front-rear direction. The second insertion hole 6 has a size and shape that allows the cylindrical member 2 to be inserted therethrough. However, the left and right side surfaces of the cover member 3 are not flat surfaces defined in the front-rear and up-down directions, but are bulging portions 7, 7 that bulge outward in a curved surface shape from the upper and lower sides toward the center in the up-down direction. Each bulging portion 7 bulges most outward at the center in the up-down direction. Due to these bulging portions 7, 7, an effect of preventing deformation of the cover member 3 is also obtained. On the upper surface of the cover member 3, an engaging hole 8 having a square shape in plan view into which the engaging protrusion 5 of the cylindrical member 2 can be engaged from the inside is formed. At the rear end opening of the cover member 3, as shown in FIG. 4(A), a folded-back portion 9 that is folded back inward over the entire circumference is formed.

[0011] Therefore, when the cylindrical member 2 is inserted into the second insertion hole 6 of the cover member 3 from the front, as shown in FIG. 4(A), the rear end of the cylindrical member 2 abuts against the folded-back portion 9 and the insertion stops. At this time, the engaging protrusion 5 is engaged with the engaging hole 8 from the inside, and the cover member 3 is prevented from coming off in the front-rear direction with respect to the cylindrical member 2. Then, as shown in FIG. 4(B), a pair of gaps 10, 10 penetrating in the front-rear direction are formed between the left and right outer surfaces of the cylindrical member 2 and the left and right inner surfaces of the cover member 3. Due to these gaps 10, 10, the contact area when inserting the cylindrical member 2 into the cover member 3 is reduced, and the insertion resistance is decreased, so that the operation of inserting the cylindrical member 2 into the cover member 3 can be easily performed.

[0012] The sound insulation member 1 configured as described above is mounted in a state of covering a part of the object 20 when the object 20 (for example, a support member of a vibration generation source such as power or a drive source, or a vehicle structure such as a structural member of a vibration transmission path), i.e., a vehicle structure, is inserted into the first insertion hole 4 of the cylindrical member 2 from the front or the rear as shown in FIGS. 5, 6, and 7(A). In the overall shape of the object 20 including the central portion that becomes the region inserted into the cylindrical member 2, the dimension in the left - right direction is slightly larger than the dimension in the left - right direction of the first insertion hole 4. And the left and right side surfaces of the object 20 are side bulging portions 21, 21 that bulge outward in a curved shape from the upper and lower sides toward the center in the vertical direction, similar to the left and right bulging portions 7, 7 of the cover member 3.

[0013] Therefore, when the object 20 is inserted into the first insertion hole 4, the cylindrical member 2 is pushed outward in the left - right direction by the side bulging portions 21, 21. Then, as shown in FIG. 7(B), the left and right outer side surfaces of the cylindrical member 2 come into contact with the left and right inner side surfaces of the cover member 3, and the cylindrical member 2 is compressed, and the gaps 10, 10 are closed. By closing the gaps 10, 10 in this way, the object 20 is held by the cylindrical member 2 by the compression reaction force of the cylindrical member 2. Therefore, the detachment of the object 20 from the sound insulation member 1 is suppressed. Also, even if there are gaps 10, 10 before the insertion of the object 20, since the gaps 10, 10 are closed after the insertion, the sound caused by vibrations etc. generated by the object 20 is absorbed by the cylindrical member 2, and it becomes difficult for the sound to leak outside from the cover member 3.

[0014] As described above, according to the sound insulation member 1 of the above - mentioned embodiment 1, it is composed of a cylindrical member 2 that covers a part of the object 20 extending in the front - rear direction (a predetermined first direction) and a cover member 3 that covers the outside of the cylindrical member 2. The cylindrical member 2 (the first cylindrical portion) is formed of a foamed resin and has a first insertion hole 4 that is formed to penetrate in the front - rear direction and through which the object 20 can be inserted. The cover member 3 (the second cylindrical portion) is formed of a resin and has a second insertion hole 6 that penetrates in the front - rear direction and through which the cylindrical member 2 can be inserted. When the object 20 is not inserted into the cylindrical member 2, gaps 10, 10 penetrating in the front - rear direction are formed between the outer surface of the cylindrical member 2 and the inner surface of the cover member 3. When the object 20 is inserted into the cylindrical member 2, the outer surface of the cylindrical member 2 and the inner surface of the cover member 3 come into contact and the gaps 10, 10 are closed. According to this configuration, the workability of inserting the cylindrical member 2 into the cover member 3 is improved by the gaps 10, 10. On the other hand, after the insertion of the cylindrical member 2, since the gaps 10, 10 are closed, the risk of the cover member 3 falling off can be effectively prevented. Also, when in a state of being attached to the object 20, sound leakage is preferably prevented by the cylindrical member 2 that closes the gaps 10, 10.

[0015] In particular, the gaps 10, 10 are formed in a pair symmetrically about the object 20 (point - symmetric positions) when viewed in a cross - section orthogonal to the front - rear direction. Therefore, the workability of inserting the cylindrical member 2 into the cover member 3 becomes better. The outer shape of the region where the object 20 is inserted into the cylindrical member 2 is formed larger than the first insertion hole 4. When the object 20 is inserted into the cylindrical member 2, the cylindrical member 2 is in a compressed state, and the object 20 is held in the cylindrical member 2 by the compression reaction force of the cylindrical member 2. Therefore, the integrity between the object 20 and the cylindrical member 2 is enhanced, and the detachment of the sound - proof member 1 can be more effectively prevented. An engaging protrusion 5 (engaging portion) is formed on the cylindrical member 2, and an engaging hole 8 (engaged portion) is formed on the cover member 3, into which the engaging protrusion 5 engages when the cylindrical member 2 is inserted through the cover member 3. Therefore, the integrity between the cylindrical member 2 and the cover member 3 is enhanced, and the detachment of the cover member 3 from the cylindrical member 2 can be more effectively prevented.

[0016] In addition, in Form 1, the following changes are possible. The gap is configured to penetrate in the front-rear direction when the object is not inserted into the cylindrical member, but is not limited to this configuration. For example, the front side that serves as the insertion inlet of the object is open, while the opening width is gradually narrowed toward the rear side, so that on the rear side, the cylindrical member and the cover member are in contact without a gap. That is, it may be a gap that extends in one direction in the front-rear direction while a part is blocked and is non-penetrating as a whole. In this case, even when the front cylindrical member protrudes from the cover member in the state where the cylindrical member is inserted into the cover member, when the object is inserted, the cylindrical member is pushed backward by the object and positioned, so that the same sound insulation performance as in Form 1 can be exhibited. The engaging protrusion and the engaging hole are not limited to a single set, and a plurality of sets may be provided. The installation location is not limited to the upper surface, and may be the lower surface or the like. The shapes of both are not limited to a square shape in plan view as long as the cover member can be prevented from coming off in the front-rear direction. For example, it may be a circular shape or a rectangular shape in plan view. The engaged portion is not limited to the engaging hole, and may be a concave portion. In the above-described Form 1, the engaging protrusion is provided on the cylindrical member and the engaging hole is provided on the cover member. Conversely, the engaging protrusion may be provided on the inner surface of the cover member, and a concave portion for engaging the engaging protrusion may be provided on the outer surface of the cylindrical member.

[0017] [Form 2] Next, another form of the present disclosure will be described. However, the same components as those in Form 1 are denoted by the same reference numerals and redundant descriptions are omitted. FIG. 8 is a perspective view of the sound insulation member and the object, and FIG. 9 is a plan view of the sound insulation member. In this sound insulation member 1A, the cylindrical member 2 is not provided with an engaging protrusion on the upper surface as shown in FIG. 10. Here, the engaging hole 8 is provided only in the cover member 3. The central portion of the upper surface of the cover member 3 is provided with an inclination that gradually increases toward the engaging hole 8. On the other hand, in the object 20, a protruding portion 22 having a square shape in plan view that is slightly smaller than the engaging hole 8 in plan view is formed upward at a position corresponding to the engaging hole 8 on the upper surface of the region inserted into the cylindrical member 2. Therefore, in a state where the cylindrical member 2 is inserted into the second insertion hole 6 of the cover member 3, the cylindrical member 2 does not engage with the engagement hole 8. However, similar to the first embodiment, a pair of gaps 10, 10 penetrating in the front-rear direction are formed between the left and right outer surfaces of the cylindrical member 2 and the left and right inner surfaces of the cover member 3 as shown in FIG. 10(B).

[0018] In the soundproof member 1A configured as described above, when the object 20 is inserted into the first insertion hole 4, as shown in FIGS. 11, 12, and 13(A), the protruding portion 22 pushes up the cylindrical member 2 from the inside, causing a part of the upper surface of the cylindrical member 2 to elastically deform upward and protrude to engage with the engagement hole 8. By this engagement, the cover member 3 is prevented from coming off in the front-rear direction with respect to the cylindrical member 2. Further, as shown in FIG. 13(B), when the cylindrical member 2 is compressed to the left and right outer sides and the left and right outer surfaces of the cylindrical member 2 pushed out to the outside come into contact with the left and right inner surfaces of the cover member 3 to close the gaps 10, 10. By closing the gaps 10, 10 in this way, the object 20 is prevented from falling off from the soundproof member 1A. Also, the sound caused by vibrations or the like generated by the object 20 is absorbed by the cylindrical member 2, making it difficult for the sound to leak to the outside from the cover member 3.

[0019] In this way, also in the soundproof member 1A of the above-described second embodiment, the workability of inserting the cylindrical member 2 into the cover member 3 is good, and the possibility of the cover member 3 coming off can be effectively prevented. Also, in a state where the object 20 is attached, the sound leakage is preferably prevented by the cylindrical member 2 that closes the gaps 10, 10. In particular, the object 20 has a protruding portion 22 protruding outward in a region where the object 20 is inserted into the cylindrical member 2, and the cover member 3 has an engagement hole 8 (engaged portion) at a position corresponding to the protruding portion 22 in a state where the cylindrical member 2 is inserted and the object 20 is inserted into the first insertion hole 4. The cylindrical member 2 is partially elastically deformed outward by the protruding portion 22 and engages with the engagement hole 8 in a state where the cylindrical member 2 is inserted into the cover member 3 and the object 20 is inserted into the first insertion hole 4. Therefore, even if an engaging portion such as an engaging protrusion is not provided on the cylindrical member 2, the protruding portion 22 of the object 20 can be used to prevent the cylindrical member 2 and the cover member 3 from coming off in the front-rear direction. Further, since the protruding portion 22 engages with the elastically deformed cylindrical member 2, the effect of preventing the object 20 from falling off is enhanced.

[0020] In addition, in the second embodiment, the position, number, and shape of the engaging holes provided in the cover member are not limited to the above embodiment. The engaging holes can be appropriately changed according to the position and shape of the protruding portion formed on the object, such as being provided on the lower surface of the cover member, providing a plurality of them, or providing them in a circular shape. Also in the second embodiment, similar to the first embodiment, the gap may be configured such that in a state where the object is not inserted into the cylindrical member, a part of the gap is blocked and does not penetrate in the front-rear direction.

[0021] Hereinafter, modification examples common to the first and second embodiments will be described. The cylindrical member is not limited to one having only the first cylindrical portion, and may have a structure in which a non-cylindrical extending portion extending in the front-rear direction is integrally provided on one or both end faces of the first cylindrical portion in the front-rear direction according to the object. The same applies to the cover member. The cover member is not limited to one having only the second cylindrical portion, and may have a structure in which a non-cylindrical extending portion extending in the front-rear direction is integrally provided on one or both end faces of the second member in the front-rear direction according to the object. The cover member may have a shape different from that of the cylindrical member. The cylindrical member is not limited to having the same outer shape in the front-rear direction. According to the object, for example, in a plan view, it may be tapered so that the width becomes wider as it goes in either the front or rear direction, or may have a shape in which the vertical height becomes higher as it goes in either the front or rear direction. The same applies to the cover member.

[0022] The bulging portion of the cover member is not limited to a structure that bulges in a curved surface shape. As long as a gap is formed between the cover member and the cylindrical member, for example, in a front view, it may bulge in a trapezoidal shape, a triangular shape, or the like. The left and right side surfaces may be tapered to partially form a gap on the upper side or the lower side between the cover member and the cylindrical member. The gap does not have to be formed symmetrically left and right. It may be only on either the left or the right side. The position where the gap is formed is not limited to the left and right side surfaces, and may be the upper surface or the lower surface. The gaps may be formed at three or more locations. The soundproof member may not be a part of the object, but may be shaped to cover the entire object.

Explanation of Reference Numerals

[0023] 1, 1A... Soundproof member, 2... Cylindrical member, 3... Cover member, 4... First insertion hole, 5... Engagement protrusion, 6... Second insertion hole, 7... Bulging portion, 8... Engagement hole, 9... Folded-back portion, 10... Gap, 20... Object, 21... Side bulging portion, 22... Protruding portion.

Claims

1. A soundproof member comprising a cylindrical member covering at least a part of an object extending in a predetermined first direction and a cover member covering the outside of the cylindrical member, wherein the cylindrical member is formed of a foamed resin and includes a first cylindrical portion having a first insertion hole formed therethrough in the first direction through which the object can be inserted, the cover member is formed of a resin and includes a second cylindrical portion having a second insertion hole formed therethrough in the first direction through which the first cylindrical portion can be inserted, the outer shape of the region of the object inserted into the first cylindrical portion is formed larger than the first insertion hole, when the object is not inserted into the first cylindrical portion, a gap extending in the first direction is formed between the outer surface of the first cylindrical portion and the inner surface of the second cylindrical portion, when the object is inserted into the first cylindrical portion, the first cylindrical portion is pushed outward so that the outer surface of the first cylindrical portion contacts the inner surface of the second cylindrical portion and the gap is closed, the first cylindrical portion is in a compressed state, and the object is held in the first cylindrical portion by the compression reaction force of the first cylindrical portion. A soundproof member characterized by that.

2. The soundproof member according to claim 1, wherein the gap penetrates in the first direction when the object is not inserted into the first cylindrical portion.

3. The soundproof member according to claim 1 or 2, wherein a pair of the gaps are formed at point-symmetrical positions centered on the object when viewed in a cross-section orthogonal to the first direction.

4. An engaging portion is formed on either one of the first cylindrical portion and the second cylindrical portion, and an engaged portion is formed on the other so that the engaging portion engages in a state where the first cylindrical portion is inserted into the second cylindrical portion. The soundproof member according to any one of claims 1 to 3, characterized in that.

5. The object has a protruding portion protruding outward in the region inserted into the first cylindrical portion, the second cylindrical portion has an engaged portion at a position corresponding to the protruding portion in a state where the first cylindrical portion is inserted and the object is inserted into the first insertion hole, the first cylindrical portion is partially elastically deformed outward by the protruding portion and engages with the engaged portion in a state where the first cylindrical portion is inserted into the second cylindrical portion and the object is inserted into the first insertion hole. The soundproof member according to any one of claims 1 to 3, characterized in that.

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