JP2019105089A - Silencer tube - Google Patents

Abstract

To provide a silencer tube that can reduce weight and cost with a simple structure and can suppress the generation of sound.SOLUTION: A silencer tube used in a vehicle sunshade device and disposed between a winding shaft and a coil spring 90 includes an inner pipe portion 101 and an outer pipe portion 102 disposed outside the inner pipe portion 101 which form a double pipe structure, the inner pipe portion 101 being formed of a member that is elastically deformable and has slidability and wear resistance, the outer pipe portion 102 being formed of a member that is more easily elastically deformed than the inner pipe portion 101, the outer pipe portion being provided with a fin 103 projecting outward along the axial direction of the silencer tube 100.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a silencer tube for use in a vehicle sunshade device including a cylindrical winding shaft, a curtain wound on the winding shaft, and an urging member for urging the curtain in a winding direction. .

  As a silencer tube used for the conventional vehicle sunshade device, there has been one using a synthetic rubber tube having a large thickness and having a buffer function. Then, a heat resistant grease is applied to the spring surface urging the curtain in the winding direction and inserted into the tube to suppress the noise at the time of operation.

  However, because of the large thickness, it is difficult to insert it into the aluminum take-up shaft on which the curtain is wound, and there is also a problem that the weight becomes heavy.

  As a countermeasure, it is easy to insert the tube with a small thickness, but when the tube vibrates, a sound is generated because the inside of the winding shaft is struck. In addition, the rubbing noise may occur due to the unevenness of the grease application of the spring. Furthermore, when the amount of grease used was large, the grease that could not fit in the tube could contaminate the curtain.

  Further, as another silencer tube 200, there is one described in FIG. 6, according to which, a thick straw-shaped tube 201 having heat resistance is used. Then, heat resistant grease is applied to the surface of the spring 190 and inserted, and the thin felt 202 is wound around the outside of the tube 201 in a spiral shape to be a shock absorbing material.

  With such a configuration, the felt 202 elastically deforms and adheres to the inside of the aluminum take-up shaft 160, so that the sound of the tube 201 hitting the inside of the take-up shaft 160 is eliminated. In addition, since the felt 202 is elastically deformed, the insertion to the winding shaft 160 is facilitated. However, the process of attaching the felt 202 is required, which complicates the structure and increases the manufacturing cost. Further, the rubbing noise due to the grease application unevenness of the spring 190 and the staining of the curtain occurred similarly to the thick tube described above.

  In addition, although it does not affect the patentability of the present invention, as a silencer disposed in the space between the winding shaft, the coil spring inserted into the winding shaft, and the space between the winding shaft and the coil spring An invention relating to a roller blind device having a damping profile of

  According to this, the damping profile was disposed such that the outer surface was in contact with the winding shaft inner side and the inner surface was in contact with the coil spring outer side. However, since the above-mentioned damping profile is formed by a single member, it is difficult to cope with both of holding the coil spring to stop the vibration and stopping the frictional noise due to the rotation of the coil spring. The

JP 2008-82158 A

  SUMMARY OF THE INVENTION In view of the above-described circumstances, the present invention has an object to provide a silencer tube that can reduce costs with a simple structure and can suppress the generation of sound.

  In the invention according to claim 1, used in a vehicle sunshade device comprising: a cylindrical winding shaft; a curtain wound around the winding shaft; and a biasing member biasing the curtain in the winding direction. A silencer tube disposed between the winding shaft and the biasing member, comprising: an inner tube portion; and an outer tube portion disposed outside the inner tube portion The inner pipe portion is formed of a member which is elastically deformable and has slidability and wear resistance, and the outer pipe portion is formed of a member which is more easily elastically deformed than the inner pipe portion. An outwardly projecting fin is disposed along the axial direction of the silencer tube.

  According to this, by using a member having slidability and wear resistance for the inner pipe portion, the noise generated when the biasing member and the silencer tube rub against each other is eliminated, and the heat resistant grease for noise reduction is applied to the biasing member. You don't have to paint. In addition, a fin which is elastically deformed more easily than the inner pipe portion is fixed in contact with the inner side of the winding shaft, and the weight of the biasing member vibrates the silencer tube to generate a sound upon hitting the winding shaft. Can be prevented. Furthermore, the use of a material capable of two-material extrusion molding can be made into one part, the number of parts at the time of assembly can be reduced, and this can contribute to the reduction of processing costs and parts costs.

  Further, in the inner peripheral surface of the winding shaft, a recessed groove is formed along the axial direction of the winding shaft, and in the state assembled as the vehicle sunshade device, the fin is in the recessed groove It is possible to arrange.

  According to this, since the fins are arranged in contact with the recessed groove, when the curtain is pulled out, the slip between the winding shaft and the silencer tube is eliminated, and the operation is synchronized, the winding shaft, Since the silencer tube can be made to follow, unnecessary vibration can be suppressed, and fluttering of the biasing member can be suppressed.

  Further, when viewed from the axial direction of the silencer tube, the arc portion and the flat portion are formed in a substantially polygonal cylindrical shape alternately arranged, and the inner surface of the flat portion and the outer surface of the biasing member are formed in contact with each other. It is done.

  According to this, in the arc portion, a gap is generated between it and the biasing member, so that the biasing member can be easily inserted into the silencer tube, and the inner surface of the silencer tube and the outer surface of the biasing member Can be controlled to prevent the silencer tube from vibrating.

  Further, the inner pipe portion and the outer pipe portion are formed of a member having heat resistance.

  According to this, it is possible to reduce deformation and performance deterioration in long-term use, and to be suitable for a vehicle sunshade device.

It is the perspective view seen from the left front side of the shading device for vehicles provided with the silencer tube of one embodiment of the present invention. It is an II-II arrow directional cross-sectional view of FIG. It is the partial disassembled perspective view seen from the left back side of the shading device for vehicles. (A) of a silencer tube is sectional drawing, (b) is the perspective view seen from the left front side. It is explanatory drawing of the function of a silencer tube. (A) is a partial disassembled perspective view seen from the left back side of the conventional vehicle sunshade device provided with a silencer tube, (b) is a perspective view seen from the left front side of the conventional silencer tube.

  One embodiment of a silencer tube used for a vehicle sunshade device of the present invention will be described based on the drawings. In the following description, the arrows in each drawing are F, B, R, L, U, U, and D, respectively.

  As shown in FIGS. 1 to 3, the vehicle shading device 10 includes a case 20, a take-up shaft 60 pivotally supported relative to the case 20, and a curtain 70 wound around the take-up shaft 60. And a coil spring 90 as a biasing member for biasing the curtain 70 in the winding direction.

  As shown in FIGS. 1 to 3, the case 20 is formed of a synthetic resin, and has a main body 21, a front support 22, and a rear support 23. The main body portion 21 has an upper wall 21a and a vertical wall 21b. The vertical wall 21b is formed in a substantially J-shape in cross section, and is allowed to rotate the take-up shaft 60 and take up and deliver the curtain 70.

  As shown in FIG. 1, a front holder 30 made of synthetic resin is attached to the front support portion 22. As shown in FIGS. 1 and 3, the front holder 30 has a mounting portion 31 and a shaft portion 32.

  The front holder 30 is screwed and attached to the front support 22 at the attachment portion 31. In the state of being attached to the case 20, the shaft portion 32 extends in the front-rear direction. A front end portion of a coil spring 90 described later is connected to the shaft portion 32.

  A cylindrical bush 40 is fitted on the outside of the shaft portion 32, and the bush 40 is rotatable relative to the front holder 30. On the outer peripheral surface of the bush 40, along the axial direction (longitudinal direction in the assembled state) of the bush 40, and projecting radially outward at equal intervals when viewed from the axial direction of the bush 40, four substantially semicircular cross sections The rib 41 is disposed.

  A rear holder 50 made of synthetic resin is attached to the rear support portion 23. As shown in FIGS. 1 and 3, the rear holder 50 has a support 51 and a fitting 52. The rear holder 50 is inserted into a support hole 24 provided in the rear support portion 23 along the front-rear direction in the support portion 51, and is formed so as to be rotatable with respect to the case 20.

  The fitting portion 52 has four substantially semicircular cross sections along the axial direction (longitudinal direction in the assembled state) of the rear holder 50 and projecting radially outward at equal intervals when viewed from the axial direction of the rear holder 50 Ribs 53 are provided.

  The winding shaft 60 is cylindrically formed of aluminum as shown in FIGS. On the inner peripheral surface of the winding shaft 60, a plurality of waveform grooves 61 (corresponding to recessed grooves in the claims) which are rotationally symmetrical along the axial direction of the winding shaft 60 are formed. The rib 41 of the bush 40 and the rib 53 of the rear holder 50 are formed in a shape that can be fitted. Further, in a state where the vehicle sunshade device 10 is assembled, the fins 103 described later can be disposed in the corrugated groove 61.

  The winding shaft 60 can be rotated relative to the case 20 by the front end portion of the winding shaft 60 being fitted with the bush 40 and the rear end portion being fitting with the fitting portion 52 of the rear holder 50. Supported by

  As shown in FIG. 1, the curtain 70 is formed of a synthetic resin in a cloth shape, and is wound around the winding shaft 60 via a double-sided adhesive tape (not shown).

  At the upper end portion of the curtain 70, an upper wire cover 71 made of synthetic resin in which an upper wire 73 is incorporated is disposed. At a central portion in the front-rear direction of the upper wire cover 71, a synthetic resin knob 72 for pulling up the curtain 70 is disposed. The upper wire cover 71 is provided with a slit portion 74 which is cut away from the upper end to the lower end and which allows the upper wire 73 to be exposed.

  The curtain 70 is biased in the winding direction by a coil spring as a biasing member described later.

  A slider 80, a coil spring 90, and a silencer tube 100 are disposed inside the winding shaft 60.

  As shown in FIG. 2, the slider 80 is formed of a synthetic resin in a substantially cylindrical shape, and along the axial direction (longitudinal direction in the assembled state) of the slider 80 on the outer peripheral surface and from the axial direction of the slider 80 A fitting portion 81 having a plurality of rotationally symmetrical waved projections that project radially outward as viewed is disposed. The fitting portion 81 is formed to be engageable with the corrugated groove 61, and the rotational movement of the winding shaft 60 can be transmitted to the slider 80.

  The coil spring 90 is made of metal, and as shown in FIGS. 2 and 3, the front end is connected to the shaft 32 of the front holder 30, and the rear end is connected to the front end of the slider 80. In the present embodiment, the outer diameter of the coil spring 90 is about 5.7 mm.

  As shown in FIGS. 2 to 4, the silencer tube 100 has a double tube structure including an inner tube portion 101 and an outer tube portion 102.

  The inner pipe portion 101 is formed in a cylindrical shape by a synthetic resin which is elastically deformable and has slidability, abrasion resistance, chemical resistance, heat resistance, oil resistance, and sound absorbing property.

  In the present embodiment, for the inner pipe portion 101, the trade name Lubber (registered trademark) of Mitsui Chemicals, Inc., and the product number L8100-R2 are used.

  The outer tube portion 102 is a synthetic resin that is elastically deformable and has heat resistance, oil resistance, compression set characteristics, and weather resistance, and is formed in a cylindrical shape in which a plurality of fins 103 described later are disposed outside There is. The outer pipe portion 102 is formed of a member that is more easily elastically deformed than the inner pipe portion 101.

  In the present embodiment, as the outer pipe portion 102, trade name Santoplane (registered trademark) of Exxon Mobil Corporation, product number 101-87 is used.

  The members constituting the inner pipe portion 101 and the outer pipe portion 102 are both materials suitable for extrusion molding, and two-material extrusion molding can be performed relatively easily. Therefore, the number of parts can be reduced, which contributes to the reduction of processing costs and parts costs.

  As shown to Fig.4 (a), the silencer tube 100 is formed in the substantially square cylinder shape in which the circular arc part 100a and the flat part 100b were alternately arrange | positioned seeing from the axial line C direction of the silencer tube 100. As shown in FIG. In the present embodiment, the distance between the opposing flat portions 100b is approximately 5.7 mm.

  At a portion corresponding to the flat portion 100b of the outer pipe portion 102, a fin 103 projecting outward is disposed along the axial direction (longitudinal direction in the assembled state) of the silencer tube 100. In the present embodiment, the protruding length of the fins 103 is about 2.1 mm.

  In this case, “flat” is not only physically “flat” but also “generally flat” in consideration of technical common sense at the time of application such as dimensional tolerance and product variation due to processing accuracy. Shall be included.

  The silencer tube 100 and the coil spring 90 are formed to have the same length. In the present embodiment, the axial length of the silencer tube 100 is about 282 mm.

  As shown in FIG. 2, a silencer tube 100 is disposed between the winding shaft 60 and the coil spring 90. The silencer tube 100 is rotatable relative to the coil spring 90.

  Explaining the function and action of the silencer tube 100, when inserting the cylindrical coil spring 90 into the silencer tube 100, the silencer tube 100 is elastically deformed by the outer circumferential surface of the coil spring 90 as shown in FIG. It can be spread and inserted without difficulty. Once the silencer tube 100 is inserted, as shown in FIG. 4 (a), the inner surface of the silencer tube 100 contacts the maximum four places on the outer surface of the coil spring 90, so that the silencer tube 100 vibrates. Can be suppressed.

  After inserting the coil spring 90 into the silencer tube 100, when the silencer tube 100 is further inserted into the take-up shaft 60, some clearance is provided between the tip of the fin 103 and the corrugated groove 61 of the take-up shaft 60 Otherwise, the friction between the silencer tube 100 and the take-up shaft 60 makes it difficult to insert. Therefore, as shown in FIG. 2, the length of the fins 103 is optimized so that a slight clearance is generated between the fins 103 and the corrugated groove 61 of the winding shaft 60.

  In the present embodiment, the clearance between the winding shaft 60 and the corrugated groove 61 is set to about 0.15 mm. In addition, since there is a clearance, it seems that the vibration during running causes the silencer tube 100 to flutter and generates a sound, but the clearance is slight and the fins 103 are more easily elastically deformed than the inner pipe portion 101. Because it is flexible, it can suppress the generation of sound.

  The usage aspect of the silencer tube 100 arrange | positioned by the shading device 10 for vehicles is demonstrated.

  In the vehicle sunshade device 10 attached to the vehicle, when the curtain 70 is pulled out, the take-up shaft 60 rotates accordingly, and when the take-up shaft 60 rotates, the fitting portion 81 engages with the corrugated groove 61 The slider 80 rotates.

  As the curtain 70 is pulled out, the slider 80 moves rearward as the diameter of the coil spring 90 becomes smaller and extends backward. Thus, a force is applied to bias the curtain 70 in the winding direction.

  The curtain 70 is raised by lifting the knob 72 and locking the upper wire 73 exposed at the two slit portions 74 of the upper wire cover 71 to two locking members (not shown) disposed inside the vehicle. Covers the window of the vehicle.

  When the locking between the locking member disposed inside the vehicle and the upper wire 73 is released, the curtain 70 is wound around the winding shaft 60 by the biasing force of the coil spring 90 in the winding direction.

  During the above operation, since the inner tube portion 101 of the silencer tube 100 has the slidability and the muffling ability, the coil spring 90 and the silencer tube 100 rub against each other even if it is rotated with respect to the coil spring 90 There is no sound generated at the time.

  Further, as shown in FIG. 2, the fins 103 are inserted into and fixed to the corrugated groove 61 of the take-up shaft 60 as shown in FIG. Prevent the sound from hitting. In addition, when the curtain 70 is pulled out, the silencer tube 100 can follow the take-up shaft 60.

  The silencer tube 100 having the above configuration includes a cylindrical take-up shaft 60, a curtain 70 wound around the take-up shaft 60, and a coil spring 90 as an urging member for urging the curtain 70 in the take-up direction. A silencer tube which is used in a sunshade device 10 for a vehicle and which is disposed between a take-up shaft 60 and a coil spring 90, and which is disposed on the inner pipe portion 101 and the outer side of the inner pipe portion 101. And the inner pipe portion 101 is formed of a member which is elastically deformable and has slidability and wear resistance, and the outer pipe portion 102 is formed of the inner pipe portion 101. A fin 103 which is formed of a member which is more easily elastically deformed than the above and which protrudes outward along the axial direction of the silencer tube 100 is disposed.

  According to this, by using a member having slidability and wear resistance for the inner pipe portion 101, there is no sound generated when the coil spring 90 and the silencer tube 100 rub, and the coil spring 90 is used for noise cancellation It is not necessary to apply heat resistant grease. In addition, the fins 103 that are more easily elastically deformed than the inner pipe portion 101 are fixed in contact with the inner side of the winding shaft 60 and the weight of the coil spring 90 vibrates the silencer tube 100 to hit the winding shaft 60. It is possible to prevent the generation of sound. Furthermore, the use of a material capable of two-material extrusion molding can be made into one part, the number of parts at the time of assembly can be reduced, and this can contribute to the reduction of processing costs and parts costs.

  Further, the corrugated groove 61 is formed on the inner peripheral surface of the take-up shaft 60 along the axial direction of the take-up shaft 60, and the fin 103 is in the corrugated groove 61 in a state assembled as the vehicle sunshade device 10. It is possible to arrange it.

  According to this, since the fins 103 are disposed in contact with the corrugated groove 61, the silencer tube 100 can be made to follow the winding shaft 60 when the curtain 70 is pulled out. Since the slip between the silencer tube 60 and the silencer tube 100 is eliminated and the operation is synchronized, unnecessary vibration can be suppressed and flapping of the coil spring 90 can be suppressed.

  Further, when viewed from the axial direction of the silencer tube 100, the arc portion 100a and the flat portion 100b are formed in a substantially square cylindrical shape alternately arranged, and the inner surface of the flat portion 100b and the outer surface of the coil spring 90 can contact It is formed.

  According to this, in the arc portion 100a, a gap is generated between the coil spring 90 and the coil spring 90, so that the coil spring 90 can be easily inserted into the silencer tube 100, and the inner surface of the silencer tube 100 and the coil spring 90. By contacting the outer surface of the silencer tube 100, the vibration of the silencer tube 100 can be suppressed.

  Further, the inner pipe portion 101 and the outer pipe portion 102 are formed of heat resistant members.

  According to this, it is possible to reduce deformation and performance deterioration in long-term use, and to be suitable for a vehicle sunshade device.

  The silencer tube 100 of the present invention is not limited to the above configuration. That is, various design changes can be made without departing from the scope of the present invention.

  For example, the number of fins 103 can be set to a number other than four as long as the fins 103 are disposed so as to be in contact with the corrugated groove 61. And the silencer tube 100 can also be made into a substantially polygonal cylinder shape other than a substantially square cylinder shape seeing from the axial direction of the silencer tube 100 corresponding to the number of fins 103.

  In addition, although the concave groove is a plurality of rotationally symmetric corrugated grooves 61, if the fins 103 can be disposed, they may be grooves having a polygonal shape in cross section.

  Moreover, it is also possible to arrange the fins 103 intermittently along the axial direction.

  In addition, as long as the inner pipe portion 101 has slidability, wear resistance, chemical resistance, heat resistance, oil resistance, and muffling property, other members can be applied.

  Further, as the outer pipe portion 102, other members can be applied as long as they have heat resistance, oil resistance, compression set characteristics, and weather resistance.

DESCRIPTION OF SYMBOLS 10 Vehicle sunshade device 60 Winding shaft 61 Corrugated groove 70 Curtain 90 Coil spring 100 Silencer tube 100a Arc portion 100b Flat portion 101 Inner tube portion 102 Outer tube portion 103 Fin

Claims (4)

It is used for a vehicle sunshade device including a cylindrical winding shaft, a curtain wound around the winding shaft, and an urging member urging the curtain in a winding direction, and the winding shaft and the winding shaft A silencer tube disposed between the biasing member and
An inner pipe portion and an outer pipe portion disposed outside the inner pipe portion to form a double pipe structure,
The inner pipe portion is formed of a member which is elastically deformable and has slidability and wear resistance,
The silencer tube is characterized in that the outer tube portion is formed of a member that is more easily elastically deformed than the inner tube portion, and fins projecting outward are disposed along the axial direction of the silencer tube. A recessed groove is formed on the inner circumferential surface of the winding shaft along the axial direction of the winding shaft.
In a state of being assembled as the vehicle sunshade device,
The silencer tube according to claim 1, wherein the fin is locatable in the recessed groove. As viewed in the axial direction of the silencer tube, the arc portion and the flat portion are formed in a substantially polygonal cylindrical shape alternately arranged.
The silencer tube according to claim 1 or 2, wherein an inner surface of the flat portion and an outer surface of the biasing member are formed in contact with each other. The silencer tube according to any one of claims 1 to 3, wherein the inner pipe portion and the outer pipe portion are formed of heat-resistant members.

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