CN217623001U - Sound-absorbing material pasting device - Google Patents

Abstract

The utility model provides a sound absorbing material pastes device can paste the sound absorbing material at the internal surface of tread portion easily. The sound absorbing material attaching device (1) is used for attaching a sound absorbing material (2) to an inner surface (Tb) of a tread portion (T2) of a pneumatic tire (T). The sound absorbing material attaching device (1) comprises: a bead widening member (3) for widening a gap between bead portions (T3) in the tire axial direction; and an insert (4) for inserting the sound absorbing material (2) from between the bead portions (T3) whose intervals are expanded toward the inner surface (Tb).

Description

Sound-absorbing material pasting device

Technical Field

The utility model relates to a sound absorbing material pastes device.

Background

Patent document 1 listed below describes an attaching device for attaching a band-like sponge to an inner surface of a tread portion of a tire. The applicator is attached to the support device. The support device enables the pasting device to be inserted into or separated from the bead seat hole of the tire.

Patent document 1: japanese patent laid-open publication No. 2018-202765

However, in a low fuel consumption tire and a high flat tire for SUV which are in growing demand in recent years, the distance between bead portions in the tire axial direction tends to be smaller than the current distance. Therefore, in such a tire, it is difficult to put the above attaching device into the tire cavity, and there is a problem that it is difficult to attach the sound absorbing material to the inner surface of the tread portion.

SUMMERY OF THE UTILITY MODEL

The present invention has been made in view of the above problems, and a main object of the present invention is to provide a sound absorbing material attaching apparatus capable of easily attaching a sound absorbing material to an inner surface of a tread portion.

The utility model discloses a sound absorbing material pastes device, it is used for having tread portion and a pair of bead portion pneumatic tire the interior surface paste sound absorbing material of tread portion, its characterized in that, this sound absorbing material pastes device contains: a bead widening member for widening a space in a tire axial direction between the pair of bead portions; and an insert for inserting the sound absorbing material from between the pair of bead portions with the expanded interval toward the inner surface.

The bead widening member may include a plurality of contact portions that are contactable with each of the pair of bead portions.

Each of the contact portions may be rotatable together with the pneumatic tire.

The utility model discloses an acoustic material pastes device can paste acoustic material at the internal surface of tread portion easily through adopting above-mentioned structure.

Drawings

Fig. 1 is a front view showing an embodiment of the sound absorbing material attaching apparatus of the present invention.

Fig. 2 is a side view of the sound absorbing material attaching apparatus holding part of fig. 1.

Fig. 3 is a perspective view for explaining an outline of the upper positioning portion.

Fig. 4 is a front view showing a wound body of the insert.

Fig. 5 is a flowchart showing an example of a processing procedure of the pasting method of the present invention.

Fig. 6 is a front view showing a modified example of the tire by the bead widening member.

Description of the reference symbols

1: a sound absorbing material attaching means; 2: a sound absorbing material; 3: a bead widening; 4: an insert; t: a pneumatic tire; t2: a tread portion; t3: a bead portion; tb: an inner surface.

Detailed Description

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

Fig. 1 is a front view schematically showing an embodiment of a sound absorbing material attaching apparatus (hereinafter, may be simply referred to as "apparatus") 1. Fig. 2 is a side view of the device 1. As shown in fig. 1 and 2, the apparatus 1 of the present embodiment is used for attaching a sound absorbing material 2 to a pneumatic tire (hereinafter, may be simply referred to as "tire") T. As the tire T used in the apparatus 1 of the present invention, for example, a tire for a passenger car such as a low fuel consumption tire or a high flat tire for SUV is preferable. The tire T may be a heavy-load tire for other passenger vehicles.

The tire T includes, for example, a tread portion T2 and a pair of bead portions T3 (shown in fig. 6). The tire T includes, for example, a pair of side portions T4. The tread portion T2 includes an outer surface Ta that comes into contact with a road surface during running and an inner surface Tb that is located on the opposite side of the outer surface Ta in the tire radial direction. The inner surface Tb forms the inner cavity of the tire T. Each sidewall T4 extends inward in the tire radial direction from both ends of the tread T2 in the tire axial direction. The sidewall portion T4 has a tire maximum width position M. Each bead portion T3 is continuous with each sidewall portion T4 and extends inward in the tire radial direction. Each bead portion T3 has a bead toe Tc located on the innermost side in the tire radial direction. The bead toe Tc is an end portion that can be brought into contact with a rim (not shown).

In the present specification, the tire maximum width position M is a position that projects most outward in the tire axial direction in a tire cross-sectional contour shape (not shown) excluding characters, a pattern portion, a rim protector, and the like provided in the sidewall portion T4 in a normal state.

The "normal state" is a state in which the tire T is mounted on a normal rim (not shown) and adjusted to a normal internal pressure without a load.

The "regular Rim" is a Rim for which the specification is determined for each tire in a specification system including the specification under which the tire T is based, and is, for example, "standard Rim" in the case of JATMA, "Design Rim" in the case of TRA, and "Measuring Rim" in the case of ETRTO.

The "normal internal PRESSURE" is an air PRESSURE determined for each TIRE in a specification system including the specification to which the TIRE T is based, and is "the highest air PRESSURE" in case of JATMA, the maximum value described in the table "TIRE LOAD list AT variation color INFLATION PRESSURES" in case of TRA, and the maximum value "INFLATION PRESSURE" in case of ETRTO.

Examples of the sound absorbing material 2 include sponge, polyester nonwoven fabric, and polystyrene nonwoven fabric. Although not particularly limited, the sound absorbing material 2 is preferably a sponge having a specific gravity of 0.06 to 0.08. In the present embodiment, the sound absorbing material 2 is formed of a long strip-like body (shown in fig. 4). One surface 2e of the sound absorbing material 2 is coated with a known adhesive and bonded to the inner surface Tb.

The device 1 of the present embodiment comprises a bead widening element 3 and an insert 4. The device 1 for example also comprises a holder 5. The bead widening member 3 has a function of widening a gap La (shown in fig. 6) between the pair of bead portions T3 in the tire axial direction. The insert 4 has a function of inserting the sound absorbing material 2 from between the pair of bead portions T3 whose interval La is enlarged toward the inner surface Tb. The holder 5 has a function of holding the tire T rotatably. In the present specification, "tire axial direction", "tire radial direction" and "tire circumferential direction" in the device 1 mean each direction in a state where the tire T is mounted on the device 1.

The holder 5 of the present embodiment includes a frame 7 and a driving unit 8.

The frame 7 includes a pair of side frames 7L, 7R disposed on both sides of the tire T in the tire axial direction, and a lateral connecting frame piece 7C joined between the side frames 7L, 7R. The connection frame piece 7C is formed of a plurality of pieces separated in the vertical direction (vertical direction), for example.

The drive section 8 has a function of rotating the tire T about the tire rotation axis. The driving unit 8 of the present embodiment is attached to the frame 7. In the present embodiment, the driving unit 8 includes a tire support member 11, a positioning member 12, and a pressing member 13.

The tire support member 11 holds the tire T in an upright state. The tire support member 11 of the present embodiment includes a pair of support rollers 11a and 11b. The pair of support rollers 11a and 11b are arranged in parallel with each other at a distance in the tire circumferential direction. The support rollers 11a and 11b of the present embodiment can be in contact with the outer surface Ta of the tread portion T2, and are horizontally disposed extending in the tire axial direction. Both ends of the pair of support rollers 11a and 11b are rotatably supported by the frame 7. One of the support rollers 11a is rotationally driven by a motor (not shown) of a known structure.

The positioning member 12 has a function of holding the position of the tire T in the tire axial direction placed on the pair of support rollers 11a and 11b. The positioning member 12 can hold the tire T rotatably while sandwiching the tire T from both sides of the sidewall portion T4, for example. The positioning member 12 includes, for example: an upper positioning portion 12A for positioning an upper portion of the tire T in a standing state; and a lower positioning portion 12B for positioning a lower portion of the tire T in the standing state.

Each of the upper positioning portion 12A and the lower positioning portion 12B includes a side support 15 held in contact with the sidewall portion T4. The side support 15 includes, for example, a roller 16 and a roller holding portion 17 that rotatably holds the roller 16. The roller 16 of the present embodiment is disposed such that the axial center 16c thereof faces, for example, the rotation axis of the tire T. The side support bodies 15 are formed of a pair arranged on both sides in the tire axial direction. The pair of side support bodies 15 sandwich the tire T from both sides in the tire axial direction.

Fig. 3 is a perspective view of the upper positioning portion 12A. As shown in fig. 3, the upper positioning portion 12A includes, for example, a plurality of side support bodies 15 and a 1 st moving member 18 for moving each side support body 15. The upper positioning portion 12A of the present embodiment has 4 side support bodies 15, and 2 side support bodies are arranged on each of both sides of the tire T in the tire axial direction. The 2 side support bodies 15 disposed on both sides in the tire axial direction are separated in the tire circumferential direction. The 1 st moving member 18 includes: a double-forked support portion 18a that supports the roller holding portion 17 separated in the tire circumferential direction; and a base portion 18b that enables the support portion 18a to move in the tire axial direction. The support portion 18a holds each side support 15 so as not to move relative to each other, for example. The base portion 18b has a known structure such as a ball screw mechanism or a cylinder mechanism.

As shown in fig. 1, the lower positioning portion 12B includes a side support 15 and a 2 nd moving member 19 for moving the side support 15. The lower positioning portion 12B of the present embodiment has 4 side support bodies 15, and 2 side support bodies are arranged on each of both sides of the tire T in the tire axial direction. The 2 side support bodies 15 disposed on both sides in the tire axial direction are separated in the tire circumferential direction. In the present embodiment, the 2 nd moving member 19 is connected to each roller holding portion 17. The 2 nd moving member 19 can move the roller holding portion 17 in the tire axial direction or the vertical direction. The 2 nd moving member 19 is formed of a known structure such as a cylinder mechanism.

The pressing member 13 of the present embodiment includes a pressing roller 20 and an air cylinder 21 for moving the pressing roller 20 in the vertical direction. The pressing roller 20 of the present embodiment is formed of a pair of rollers 20a (shown in fig. 3) separated in the tire circumferential direction. The pair of rollers 20a are rotatably held by the base 18b, respectively, for example. The cylinder 21 is supported at the upper end of the connection frame piece 7C, for example. In the present embodiment, the lower end of the rod of the cylinder 21 is connected to the base 18b. The pressing member 13 can move the pressing roller 20 in the vertical direction together with the base 18b by the extending operation of the air cylinder 21. Thus, the pressing member 13 can apply a pressing force to the tire T between the pair of support rollers 11a and 11b and the pressing roller 20, and stabilize the rotation of the tire T by the support roller 11 a.

The bead widening part 3 includes, for example, a bead widening part 30 that moves the bead portion T3 outward in the tire axial direction. The bead widening 30 includes: a 1 st bead widening portion 30A (shown in fig. 6) disposed on one side in the tire axial direction; and a 2 nd bead widening portion 30B (shown in fig. 6) disposed on the other side in the tire axial direction. The 1 st bead widening section 30A and the 2 nd bead widening section 30B may be provided, for example, 1 each, or may be provided in plural at intervals in the tire circumferential direction. In the present embodiment, the 1 st bead widening section 30A and the 2 nd bead widening section 30B are provided in 4 numbers, respectively.

The bead widening section 30 includes a contact section 31 and a moving section (not shown) capable of moving the contact section 31 in the tire axial direction and the tire radius, respectively. The moving unit is configured by a known structure such as a ball screw mechanism or a cylinder mechanism.

The contact portion 31 of the present embodiment includes a guide roller portion 35 and a roller holder 36 that rotatably supports the guide roller portion 35. The contact portion 31 is formed in an L shape in which the guide roller portion 35 and the roller holder 36 are connected in a vertical direction, for example.

The guide roller portion 35 is formed in a cylindrical shape. The guide roller portion 35 of the present embodiment can be in contact with the tire T so that the longitudinal direction thereof is oriented in the tire radial direction. The roller holder 36 includes a base 37 and a support shaft 38 extending in a direction perpendicular to the base 37. The base 37 extends, for example, in the tire axial direction. The support shaft 38 rotatably supports the guide roller portion 35 via a bearing (not shown), for example. Thereby, the guide roller portion 35 rotates following the tire T by contacting the bead portion T3 of the rotating tire T.

As shown in fig. 1, the insert 4 of the present embodiment includes: a winding body 41 wound with the sound absorbing material 2; and a support 42 that supports the wound body 41.

Fig. 4 is a front view of the roll body 41. As shown in fig. 4, the roll body 41 includes a frame 43, a holding frame 44, a base paper collecting section 45, and a pasting roller 46.

The frame 43 is formed in a plate shape for supporting the holding frame 44, the base paper collecting section 45, and the pasting roller 46, for example. A guide roller 47 for guiding the sound absorbing material 2 to the pasting roller 46 is rotatably disposed on the frame 43 of the present embodiment.

The holding frame 44 holds the sound absorbing material 2A with the backing paper wound in a spiral shape. The sound absorbing material 2A with the lining paper is formed by sticking the lining paper P to one surface 2e of the sound absorbing material 2. At this time, the mount P faces, for example, the outer side in the radial direction of the scroll. The holding frame 44 of the present embodiment includes: an annular peripheral frame portion 48 surrounding the outer periphery of the vortex-shaped sound absorbing material 2; and a take-out port 49 connected to the peripheral frame portion 48 and taking out the sound absorbing material 2 by winding it back.

The lining paper collection unit 45 includes: a peeling roller 50 for peeling the backing paper P from the sound-absorbing material 2 taken out through the take-out opening 49; and a winding roller 51 that winds and collects the peeled interleaving paper P. The sound absorbing material 2 from which the interleaving paper P is peeled is guided by the guide roller 47.

The pasting roller 46 presses the sound absorbing material 2 from which the mount paper P is peeled against the inner surface Tb and pastes the sound absorbing material on the inner surface Tb. The pasting roller 46 is rotatably held at the rod lower end of an air cylinder 53 fixed to the frame 43 via a roller holder of a known structure.

As shown in fig. 1, the support body 42 includes, for example, at least a traverse section 54, a vertical movement section 55, and a tire size adjustment section 56. The traverse section 54 moves the wound body 41 in the tire axial direction and inserts the wound body into the inner cavity of the tire T from the opening of the bead section T3. The vertical movement portion 55 moves the wound body 41 inserted into the cavity of the tire T outward in the tire radial direction (downward in the present embodiment), and the sound absorbing material 2 is thereby stuck to the inner surface Tb. The tire size adjusting section 56 moves the traverse section 54 and the vertical movement section 55 up and down in accordance with the size (diameter) of the tire T. This allows the sound absorbing material 2 to be attached to the inner surface Tb of the tire T of various sizes.

Next, a method of attaching the sound absorbing material 2 using the device 1 of the present embodiment will be described. Fig. 5 is a flowchart showing an example of a processing procedure of the pasting method according to the present embodiment. As shown in fig. 5, the attaching method of the present embodiment includes the steps of: a widening step S2 of widening a gap La (shown in fig. 6) between the pair of bead portions T3 in the tire axial direction; and an insertion step S3 of inserting the sound absorbing material 2 from between the bead portions T3 with the expanded space toward the inner surface Tb. The attaching method of the present embodiment includes a fixing step S1 of fixing the tire T.

First, the fixing step S1 is performed. As shown in fig. 1 and 2, in the fixing step S1, the tire T is put into the holder 5. At this time, the insert 4 and the bead stretcher 3 stand by outside the tire T (not shown).

In the fixing step S1, the tire T is placed on the pair of support rollers 11a and 11b of the driving unit 8. Thereby, the tire T is set in a standing state. Next, in the fixing step S1, the side support bodies 15 of the positioning portions 12A and 12B are moved to predetermined positions of the sidewall portion T4 of the tire T by the 1 st moving member 18 and the 2 nd moving member 19. In the present embodiment, each side support body 15 is disposed at a position outside the tire maximum width position M in the tire axial direction.

In the fixing step S1, the cylinder 21 of the pressing member 13 extends downward. Thereby, the tire T is sandwiched between the pressing roller 20 and the tire support member 11. Thus, in the fixing step S1, the tire T is positioned in the tire axial direction and the vertical direction.

Next, the widening step S2 is performed. Fig. 6 is a front view showing a modification of the tire T by the bead widening member 3. As shown in fig. 6, in the widening step S2 of the present embodiment, first, the contact portion 31 of the bead widening member 3 is disposed on the inner side of the bead portion T3 of the tire T in the tire axial direction. Specifically, the moving portion, not shown, is driven to dispose each guide roller portion 35 in the cavity of the tire T.

Next, in the widening step S2, the guide roller portion 35 abuts on a predetermined position of the bead portion T3 and moves outward in the tire axial direction. Thereby, the tire axial direction interval La of the bead portion T3 is enlarged. The guide roller portion 35 is positioned, for example, so as to contact the bead toe Tc. Further, since the side surface support bodies 15 of the positioning members 12 are disposed at the above-described positions, even when the widening step S2 of the present embodiment is performed, for example, the inner surface Tb of the tread portion T2 can be suppressed from protruding inward in the tire radius direction.

Subsequently, an inserting step S3 is performed. In the insertion step S3 of the present embodiment, the wound body 41 waiting outside the tire T is disposed at a predetermined position in the inner cavity of the tire T via the support body 42. Next, the support roller 11a is rotated and the tire T is rotated. Next, the sound absorbing material 2 is attached to the inner surface Tb of the tire T by the wound body 41. In this way, in the device 1 of the present embodiment, since the contact between the insert 4 and the bead portion T3 is suppressed, the sound absorbing material 2 can be attached with high accuracy.

While the above description has been made of the particularly preferred embodiment of the present invention, the present invention is not limited to the illustrated embodiment, and can be modified into various forms.

[ accompanying notes ]

The present disclosure includes the following means.

[ disclosure 1]

A sound absorbing material attaching apparatus for attaching a sound absorbing material to an inner surface of a tread portion of a pneumatic tire having the tread portion and a pair of bead portions,

this sound absorbing material sticking apparatus includes:

a bead widening member for widening a gap in a tire axial direction between the pair of bead portions; and

and an insert for inserting the sound absorbing material from between the pair of bead portions with the expanded interval toward the inner surface.

[ disclosure 2]

The sound-absorbing material attaching apparatus according to the present disclosure 1, wherein,

the bead widening member includes a plurality of contact portions contactable with each of the pair of bead portions.

[ disclosure 3]

The sound-absorbing material attaching apparatus according to the present disclosure 2, wherein,

each of the contact portions is rotatable together with the pneumatic tire.

[ disclosure 4]

A sound absorbing material attaching method for attaching a sound absorbing material to an inner surface of a tread portion of a pneumatic tire having the tread portion and a pair of bead portions,

the method for attaching the sound absorbing material includes the steps of:

expanding a tire axial direction interval between the pair of bead portions; and

inserting the sound absorbing material from between the pair of bead portions with the expanded interval toward the inner surface.

[ disclosure 5]

The method for attaching a sound-absorbing material according to the present disclosure 4,

in the step of enlarging the gap, the contact portion that contacts each of the bead portions is moved outward in the tire axial direction.

[ present disclosure 6]

A method for manufacturing a pneumatic tire, comprising the method for attaching a sound absorbing material according to claim 4 or 5.

Claims (3)

1. A sound absorbing material attaching apparatus for attaching a sound absorbing material to an inner surface of a tread portion of a pneumatic tire having the tread portion and a pair of bead portions,

this sound absorbing material sticking apparatus includes:

a bead widening member for widening a space in a tire axial direction between the pair of bead portions; and

an insert for inserting the sound absorbing material from between the pair of bead portions with the expanded interval toward the inner surface.

2. The sound-absorbing material attaching apparatus according to claim 1,

the bead widening member includes a plurality of contact portions contactable with each of the pair of bead portions.

3. The sound-absorbing material attaching apparatus according to claim 2,

each of the contact portions is rotatable together with the pneumatic tire.

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