JP2011025759A - Device and method for manufacturing non-pneumatic tire, and non-pneumatic tire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately and efficiently form a non-pneumatic tire. <P>SOLUTION: A device for manufacturing the non-pneumatic tire is provided. The non-pneumatic tire includes a disk-shaped inner supporting body 42 having an outer peripheral surface part 41 supporting a ring-shaped body 12 from its inner peripheral surface 12b side. In the inner supporting body, a storage hole 47, arranged coaxially with the inner supporting body and having an inner peripheral surface part 46 supporting a mounting body 11 from its outer peripheral surface side, is formed. An outer peripheral surface part of the inner supporting body is configured to support a part in a tire width direction H positioned another side from the position of a first fixing part 12A in the ring-shaped body to expose the first fixing part 12A. The inner peripheral surface part of the storage hole is configured to support a part in the tire width direction positioned another side from the first fixing part 11A to expose the first fixing part 11A. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a non-pneumatic tire manufacturing apparatus, a non-pneumatic tire manufacturing method, and a non-pneumatic tire that form a non-pneumatic tire that does not need to be filled with pressurized air when used.

In a conventional pneumatic tire that is used while being filled with pressurized air, the occurrence of puncture is an unavoidable problem in structure. Therefore, as a non-pneumatic tire that can prevent the occurrence of puncture, a so-called solid tire having a solid structure filled with a rubber material has been proposed.
However, this type of non-pneumatic tire is heavier than pneumatic tires, and also has increased hardness and rolling resistance, which greatly reduces ride comfort and maneuverability, making it difficult to apply to ordinary vehicles. The scope of its application was limited.
In order to solve such problems, for example, as shown in Patent Documents 1 and 2 below, an attachment body attached to an axle, a ring-like body surrounding the attachment body from the outside in the tire radial direction, and a tire There has been proposed a non-pneumatic tire including a plurality of connecting members that are provided along the circumferential direction and connect the attachment body and the ring-shaped body.
In this type of non-pneumatic tire, for example, when a load is input from a road surface or the like, the connecting member is elastically deformed so that the non-pneumatic tire can be provided with flexibility, so that a good riding comfort can be achieved. Sex can be secured.

JP 2009-61861 A US Pat. No. 6,170,544

However, conventionally, it has been difficult to form a non-pneumatic tire by making the axes of the attachment body and the ring-like body substantially coincide with each other and making the deformation states of the plurality of connecting members substantially uniform over the entire circumference in the tire circumferential direction. There was a problem that there was.
Note that if the axes of the attachment body and the ring-shaped body are displaced from each other and the deformation states of the plurality of connecting members differ depending on the positions in the tire circumferential direction, for example, the uniformity and the ride comfort may be deteriorated. In addition, in the final stage in the process of sequentially connecting the attachment body and the ring-shaped body by the plurality of connection members, it is difficult to connect the attachment body and the ring-shaped body by the connection member, for example, the connection member must be greatly deformed. It may become.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a non-pneumatic tire manufacturing apparatus and a non-pneumatic tire capable of forming a non-pneumatic tire with high accuracy and high efficiency. It is to provide a manufacturing method and a non-pneumatic tire.

In order to solve the above problems, the present invention proposes the following means.
An apparatus for manufacturing a non-pneumatic tire according to the present invention includes an attachment body attached to an axle, a ring-like body surrounding the attachment body from the outside in the tire radial direction, and a plurality of attachment bodies provided along the tire circumferential direction. And a connecting member that connects the ring-shaped body, and the connecting member has first ends connected to the first fixing portions of the attachment body and the ring-shaped body, respectively. A non-pneumatic tire manufacturing apparatus for manufacturing a non-pneumatic tire comprising: a disk-shaped inner support body whose outer peripheral surface portion supports the ring-shaped body from its inner peripheral surface side; Is disposed coaxially with the inner support body, and an inner peripheral surface portion is formed with a storage hole for supporting the attachment body from the outer peripheral surface side, and the outer peripheral surface portion of the inner support body is formed on the ring-shaped body. It is comprised so that the part located in the one side of a tire width direction may be supported rather than 1 fixing | fixed part, and this 1st fixing | fixed part may be exposed, The inner peripheral surface part of the said storage hole is a said 1st fixing | fixed part in the said attachment body. Further, it is configured to support a portion located on one side in the tire width direction to expose the first fixing portion.

  A non-pneumatic tire manufacturing method according to the present invention is a non-pneumatic tire manufacturing method using the non-pneumatic tire manufacturing apparatus according to the present invention, wherein the non-pneumatic tire manufacturing method includes the outer peripheral surface portion of the inner support. A ring-shaped body supporting step for supporting the ring-shaped body from the inner peripheral surface side, a mounting body supporting step for supporting the mounting body from the outer peripheral surface side by the inner peripheral surface portion of the storage hole, the ring-shaped body and the A first connecting step of fixing both ends of the first connecting plate to the first fixing portion of each of the mounting bodies, and connecting the ring-shaped body and the mounting body with the first connecting plate. And

  The non-pneumatic tire according to the present invention is manufactured by the method for manufacturing a non-pneumatic tire.

In these inventions, the inner support body is formed with the storage hole arranged coaxially with the inner support body, so that the outer peripheral surface portion of the inner support body supports the ring-shaped body from the inner peripheral surface side. In addition, the inner peripheral surface portion of the storage hole supports the attachment body from the outer peripheral surface side, so that the axial lines of the ring-shaped body and the attachment body can be fixed in a matched state.
In addition, the outer peripheral surface portion of the inner support body is configured to support a portion of the ring-shaped body located on one side in the tire width direction with respect to the first fixing portion and to expose the first fixing portion. Since the inner peripheral surface portion is configured to support a portion located on one side in the tire width direction with respect to the first fixing portion in the mounting body and expose the first fixing portion, the first connecting plate Both end portions can be easily fixed to the ring-shaped body and the mounting body which are fixed in a state where the respective axes coincide with each other.
From the above, it is possible to form the non-pneumatic tire by making the axes of the attachment body and the ring-shaped body coincide with each other, and making the deformation states of the plurality of first connection plates uniform over the entire circumference in the tire circumferential direction. Uniformity and ride comfort can be improved, and the connection of the attachment body and the ring-shaped body in the manufacturing process by the first connection plate can be easily performed for all the first connection plates. Therefore, a non-pneumatic tire can be formed with high accuracy and high efficiency.

  When the first connecting plate of the non-pneumatic tire is curved so as to be convex toward the tire circumferential direction in a side view of the non-pneumatic tire viewed from the outside in the tire width direction, Since the deformation states of the plurality of first connecting plates are likely to vary greatly in the tire circumferential direction, the above-described effects are remarkably achieved.

  Further, in the non-pneumatic tire manufacturing apparatus according to the present invention, a plurality of ring divided bodies obtained by dividing the ring-shaped body along the tire circumferential direction are supported on the outer peripheral surface portion of the inner support. A plurality of positioning grooves for positioning each around the axis of the body may be formed around the axis so as to be spaced apart from each other.

  In this case, since the positioning groove is formed on the outer peripheral surface portion of the inner support body at a distance from each other around the axis, the ring-shaped body is formed of a plurality of ring divided bodies. Thus, the above-described effects are remarkably achieved.

  In the non-pneumatic tire manufacturing apparatus according to the present invention, both ends of the connecting member are positioned on one side in the tire width direction with respect to the first fixed portion in each of the attachment body and the ring-shaped body. A second connecting plate separately fixed to the second fixing portion, and an inner peripheral surface portion supporting a ring-shaped body connected to the attachment body by a plurality of the first connecting plates from the outer peripheral surface side. An outer support may be provided.

  The non-pneumatic tire manufacturing method according to the present invention is a non-pneumatic tire manufacturing method using the non-pneumatic tire manufacturing apparatus according to the present invention, wherein the non-pneumatic tire manufacturing method includes the outer peripheral surface portion of the inner support. A ring-shaped body supporting step for supporting the ring-shaped body from the inner peripheral surface side, a mounting body supporting step for supporting the mounting body from the outer peripheral surface side by the inner peripheral surface portion of the storage hole, the ring-shaped body and the A first connecting step of fixing both ends of the first connecting plate to the first fixing portion of each of the mounting bodies, and connecting the ring-shaped body and the mounting body with the first connecting plate to form an intermediate member; A support releasing step of releasing the support of the ring-shaped body in the intermediate member by the outer peripheral surface portion of the support body, and the support of the attachment body in the intermediate member by the inner peripheral surface portion of the storage hole; and the outer support An intermediate member supporting step of supporting the ring-shaped body in the intermediate member from the outer peripheral surface side by the inner peripheral surface portion of the body, and both ends of the second connecting plate on the second fixing portion of each of the ring-shaped body and the mounting body in the intermediate member A second connection step of fixing the parts separately and connecting the ring-shaped body and the attachment body with a second connection plate.

  In these cases, since the outer support is provided, after the ring-shaped body and the attachment body are connected by the first connecting plate, the ring-shaped body is supported by the outer peripheral surface of the inner support, and the inner peripheral surface of the storage hole. In addition to releasing the support of the mounting body by the outer support body and supporting the ring-shaped body from the outer peripheral surface side by the outer support body, this is coupled with the fact that the ring-shaped body and the mounting body are connected by the first connecting plate. Thus, it is possible to connect the ring-shaped body and the mounting body by the second connecting plate while reliably maintaining the state in which the respective axes of the ring-shaped body and the mounting body are matched. Therefore, even when the connecting member includes the first connecting plate and the second connecting plate, the non-pneumatic tire can be formed with high accuracy.

  In the non-pneumatic tire manufacturing apparatus according to the present invention, the inner peripheral surface portion of the outer support supports a portion of the ring-shaped body that is located on the other side in the tire width direction with respect to the second fixing portion. The second fixing portion may be exposed.

  In this case, the inner peripheral surface portion of the outer support is configured to support a portion of the ring-shaped body located on the other side in the tire width direction with respect to the second fixing portion and expose the second fixing portion. Therefore, for example, the ring-shaped body side end portion of the second connecting plate of the non-pneumatic tire is inserted into the insertion hole formed in the second fixing portion of the ring-shaped body from the outside in the tire radial direction. Even when the configuration of fixing to the inner peripheral surface side of the ring-shaped member is adopted, the end of the ring-shaped member side is fixed to the ring-shaped member while the ring-shaped member is supported from the outer peripheral surface side by the outer support member. be able to. Therefore, it is possible to easily fix the end of the second connecting plate on the ring-shaped body side and the second fixing portion of the ring-shaped body after forming the non-pneumatic tire with high accuracy. The cost increase of the entering tire can be suppressed.

  According to the present invention, a non-pneumatic tire can be formed with high accuracy and high efficiency.

In one Embodiment which concerns on this invention, it is the schematic perspective view which decomposed | disassembled some non-pneumatic tires. It is a schematic perspective view which shows a part of non-pneumatic tire of FIG. It is the front view which looked at some non-pneumatic tires shown in Drawing 1 and Drawing 2 from the tire width direction. FIG. 4 is a side view of a part of the non-pneumatic tire shown in FIG. 3. It is an expanded sectional view of the X section of the non-pneumatic tire shown in FIG. It is a perspective view which shows the inner side support body with which the manufacturing apparatus of the non-pneumatic tire which manufactures the non-pneumatic tire shown in FIGS. 1-5 was equipped. It is a perspective view which shows the outer side support body with which the manufacturing apparatus of the non-pneumatic tire which manufactures the non-pneumatic tire shown in FIGS. 1-5 is equipped. FIG. 8 is a process diagram illustrating a method for manufacturing a non-pneumatic tire using the non-pneumatic tire manufacturing apparatus shown in FIGS. 6 and 7. FIG. 8 is a process diagram illustrating a method for manufacturing a non-pneumatic tire using the non-pneumatic tire manufacturing apparatus shown in FIGS. 6 and 7. FIG. 8 is a process diagram illustrating a method for manufacturing a non-pneumatic tire using the non-pneumatic tire manufacturing apparatus shown in FIGS. 6 and 7. FIG. 8 is a process diagram illustrating a method for manufacturing a non-pneumatic tire using the non-pneumatic tire manufacturing apparatus shown in FIGS. 6 and 7. It is a perspective view which shows the modification of the manufacturing apparatus of the non-pneumatic tire based on this invention. It is one process figure explaining the manufacturing method of the non-pneumatic tire using the manufacturing apparatus of the non-pneumatic tire shown in FIG.

Hereinafter, an embodiment of a non-pneumatic tire according to the present invention will be described with reference to FIGS. 1 to 5.
The non-pneumatic tire 1 includes a mounting body 11 attached to an axle (not shown), a ring-shaped body 12 surrounding the mounting body 11 from the outside in the tire radial direction, and a plurality of mounting bodies 11 provided along the tire circumferential direction. A connecting member 13 that connects the outer peripheral surface side and the inner peripheral surface 12b side of the ring-shaped body 12, a tread member 14 disposed on the outer peripheral surface 12c side of the ring-shaped body 12 over the entire circumference, and the ring-shaped body 12 And a reinforcing layer 15 disposed between the tread member 14 and the tread member 14.
The attachment body 11, the ring-shaped body 12, the tread member 14, and the reinforcing layer 15 are each formed with the same size in the tire width direction H and are coaxial with the axis O in the tire width direction H. The central portions are arranged to coincide with each other. Hereinafter, a direction along the axis O is referred to as a tire width direction H, a direction orthogonal to the axis O is referred to as a tire radial direction, and a direction around the axis O is referred to as a tire circumferential direction.

  The attachment body 11 is formed in a cylindrical shape, and a plurality of ribs 11 a extending along the tire radial direction and having both ends connected to the inner peripheral surface of the attachment body 11 are provided inside the attachment body 11. These ribs 11a are arranged point-symmetrically with respect to the axis O. A mounting hole 11b into which the front end of the axle is fitted is formed at the center in the tire radial direction where the plurality of ribs 11a intersect inside the mounting body 11. The attachment body 11 and the rib 11a are integrally formed of a metal material such as an aluminum alloy.

The tread member 14 is formed in a cylindrical shape, and integrally covers the outer peripheral surface 12c side of the ring-shaped body 12 over the entire region. The tread member 14 is made of, for example, vulcanized rubber obtained by vulcanizing natural rubber and / or a rubber composition, or a thermoplastic material. Examples of the thermoplastic material include a thermoplastic elastomer or a thermoplastic resin. Examples of the thermoplastic elastomer include amide-based thermoplastic elastomer (TPA), ester-based thermoplastic elastomer (TPC), olefin-based thermoplastic elastomer (TPO), styrene-based thermoplastic elastomer (TPS), and urethane as defined in JIS K6418. Examples thereof include a thermoplastic elastomer (TPU), a crosslinked thermoplastic rubber (TPV), and other thermoplastic elastomers (TPZ). Examples of the thermoplastic resin include urethane resin, olefin resin, vinyl chloride resin, and polyamide resin. In addition, it is preferable to form the tread member 14 with vulcanized rubber from the viewpoint of wear resistance.
The reinforcing layer 15 includes a rubber sheet formed in a cylindrical shape, and a steel cord embedded in a plurality of rows in the rubber sheet. The reinforcing layer 15 is in close contact with the inner peripheral surface of the tread member 14 and the outer peripheral surface 12c of the ring-shaped body 12 by elastic restoring forces of both connecting plates 21 and 22 described later. The reinforcing layer 15 may be formed integrally with the tread member 14, and an organic fiber may be embedded in the rubber sheet instead of the steel cord.

  The connecting member 13 includes a first connecting plate 21 that is curved so as to protrude toward one side in the tire circumferential direction when the non-pneumatic tire 1 is viewed from the outside in the tire width direction H, and the other side. And a second connecting plate 22 that is curved so as to protrude toward the side. Each of the first connection plate 21 and the second connection plate 22 is formed of, for example, a metal material or a resin material that has almost no hysteresis loss. One end portions 21 a and 22 a of both the connecting plates 21 and 22 are fixed to the inner peripheral surface 12 b side of the ring-shaped body 12, and the other end portions 21 b and 22 b are fixed to the attachment body 11.

In each of the connecting plates 21 and 22, the intermediate portion positioned between the one end portion 21a and 22a and the other end portion 21b and 22b is curved so as to be convex in the tire circumferential direction as described above.
In this intermediate portion, the one end side portion located on the one end portion 21a, 22a side has a larger radius of curvature in the tire side view than the other end side portion located on the other end portion 21b, 22b side, and is longer. Is getting longer. The one end portions 21a and 22a of the connecting plates 21 and 22 are connected to the intermediate portion via a bent portion, and extend toward the opposite side of the tire circumferential direction in which the intermediate portion is curved and convex. is doing. The other end portions 21b, 22b of both the connecting plates 21, 22 are smoothly connected to the intermediate portion and extend in a direction substantially orthogonal to the one end portions 21a, 22a. In addition, the one end parts 21a and 22a and the other end parts 21b and 22b in both the connecting plates 21 and 22 are each formed in a flat or single arc shape.

The one end portions 21 a and 22 a of both the connecting plates 21 and 22 are fixed at the same position in the tire circumferential direction on the inner peripheral surface 12 b side of the ring-shaped body 12.
The shape of each connecting member 13 in the side view of the tire is line-symmetric with respect to an imaginary line L that extends through the tire circumferential direction center portion of the connecting member 13 along the tire radial direction, as shown in FIG. It has become. The imaginary line L passes through the one end portions 21a and 22a of the connecting plates 21 and 22 and the axis O.
That is, the lengths of both the connecting plates 21 and 22 are equal to each other, and the other end portions 21b and 22b of the both connecting plates 21 and 22 are arranged on the outer peripheral surface of the mounting body 11 in the tire side view. Each position is spaced apart from each end 21a, 22a in the tire radial direction by the same angle (for example, 20 ° to 135 °) on one side and the other side in the tire circumferential direction around the axis O. It is fixed separately. When this angle is set to 20 ° or more and 90 ° or less, for example, both the connecting plates adjacent to each other in the tire circumferential direction can be reduced while reducing the weight of the non-pneumatic tire 1 while securing a large number of connecting members 13. It is possible to prevent interference between the two 21 and 22.

The plurality of connecting members 13 are separately arranged between the attachment body 11 and the ring-shaped body 12 at positions that are point-symmetric with respect to the axis O.
Furthermore, the connecting member 13 includes a plurality of first connecting plates 21 arranged along the tire circumferential direction at a position in one tire width direction H, and the second connecting plate 22 is positioned more than the position in the one tire width direction H. A plurality (60 in the illustrated example) are provided along the tire circumferential direction so that a plurality are arranged along the tire circumferential direction at positions separated on one side in the tire width direction H. In the present embodiment, a plurality of second connection plates 22 are arranged at one end in the tire width direction H of the non-pneumatic tire 1, and the first connection plate 21 is a tire width direction H of the non-pneumatic tire 1. A plurality of them are arranged at the other end of the.

  Then, both end portions 21a and 21b of the first connecting plate 21 are fixed separately to the first end portions (first fixing portions) 11A and 12A on the other side in the tire width direction H of the ring-shaped body 12 and the attachment body 11, respectively. The both end portions 22a and 22b of the second connecting plate 22 are portions located on one side in the tire width direction H from the first end portions 11A and 12A in the ring-shaped body 12 and the attachment body 11, respectively. The second ends (second fixing portions) 11B and 12B on one side of H are fixed separately.

Further, the first connecting plates 21 adjacent in the tire circumferential direction are substantially parallel to each other and opposed in the tire circumferential direction, and the second connecting plates 22 adjacent in the tire circumferential direction are also substantially parallel to each other. Opposing in the circumferential direction. Furthermore, all the connecting members 13 have the same shape and size.
The sizes of the first connecting plate 21 and the second connecting plate 22 in the tire width direction H (the direction of the axis O), that is, the widths thereof are equal to each other. The thicknesses of the first connecting plate 21 and the second connecting plate 22 are also equal to each other. Furthermore, in each of these connection plates 21 and 22, the widths of the one end portions 21a and 22a and the other end portions 21b and 22b are larger than the intermediate portions located between them.

  The ring-shaped body 12 is divided into a large number of ring divided bodies 12a along the tire circumferential direction. The ring divided body 12a is formed of a metal material, and its size in the tire radial direction, that is, its thickness is larger than the thickness of both the connecting plates 21 and 22. Further, both end portions 12A and 12B in the tire width direction H on the back surface of the ring divided body 12a constituting the inner peripheral surface 12b of the ring-shaped body 12 are recessed. Further, a gap in the tire circumferential direction is provided between the ring divided bodies 12a adjacent in the tire circumferential direction. Further, the one end portions 21a and 22a of both the connecting plates 21 and 22 in one connecting member 13 are respectively fixed to both end portions 12A and 12B in the tire width direction H on the back surface of one ring divided body 12a.

Here, in the present embodiment, the one end portions 21a and 22a of the connecting plates 21 and 22 are ring-shaped by bolts 31 inserted from the outside in the tire radial direction into the insertion holes 33 formed in the ring-shaped body 12. The body 12 is fixed to the inner peripheral surface 12b side.
In the example shown in the drawing, a female screw member 32 having a female screw is disposed on each of the one end portions 21a and 22a of the connecting plates 21 and 22, and a first through hole is formed. Then, the bolt 31 inserted into the insertion hole 33 as described above is screwed into the female screw of the female screw member 32 through the first through hole, whereby each of the one end portions 21a of both the connecting plates 21 and 22; 22 a is sandwiched between the female screw member 32 and the ring-shaped body 12 in the tire radial direction and is fixed to the inner peripheral surface 12 b side of the ring-shaped body 12.

The outer portion of the insertion hole 33 located outside in the tire radial direction is a counterbore hole 33a, and the head of the bolt 31 is accommodated in the counterbore hole 33a. That is, the counterbore hole 33 a is a recess that houses the head of the bolt 31. In the illustrated example, the counterbore hole 33a is gradually reduced in diameter toward the inner side in the tire radial direction, and the head of the bolt 31 is a countersunk bolt formed in an inverted truncated cone shape.
The female screw member 32 is a plate body on which a plurality of female screws are formed, and a plurality of bolts 31 are provided. In the illustrated example, the female screw member 32 is formed in a rectangular shape in plan view that is long in the tire width direction H, and two female screws are formed at intervals in the tire width direction H. Note that two first through holes are formed at one end portions 21a and 22a of the connecting plates 21 and 22 at intervals in the tire width direction H, respectively.

Further, in the illustrated example, a bolt (not shown) that fixes the tread member 14, the reinforcing layer 15, and the ring-shaped body 12 to each other is inserted in an intermediate portion of the ring-shaped body 12, the tread member 14, and the reinforcing layer 15 in the tire width direction H. The first bolt insertion hole 12d, the second bolt insertion hole 14a, and the third bolt insertion hole 15a are formed separately.
In the example shown in the drawing, the first bolt insertion holes 12d penetrate through each ring divided body 12a in the tire radial direction and are formed in each ring divided body 12a at intervals in the tire width direction H. A female screw is formed on the inner peripheral surface of the first bolt insertion hole 12d.
Further, a plurality of second bolt insertion holes 14a are formed penetrating the tread member 14 in the tire radial direction, and are disposed separately at positions on the tread member 14 that are coaxial with the first bolt insertion holes 12d. Furthermore, a plurality of third bolt insertion holes 15a are formed so as to penetrate the reinforcing layer 15 in the tire radial direction, and are arranged separately at positions in the reinforcing layer 15 that are coaxial with the first bolt insertion holes 12d.

In the ring-shaped body 12, there is provided an elastic member 16 that extends over the entire circumference along the tire circumferential direction and connects a large number of ring divided bodies 12a in the tire circumferential direction. The elastic member 16 is made of, for example, a metal material, natural rubber or / and vulcanized rubber obtained by vulcanizing a rubber composition, or a thermoplastic material. Examples of the metal material include aluminum and stainless steel. Examples of the thermoplastic material include the aforementioned thermoplastic elastomers or thermoplastic resins.
In the example shown in the drawing, the elastic members 16 are disposed separately at both ends 12 </ b> A and 12 </ b> B in the tire width direction H in the ring-shaped body 12. Further, a gap in the tire radial direction is provided between a portion of the elastic member 16 located between the ring divided bodies 12 a adjacent in the tire circumferential direction and the inner peripheral surface of the reinforcing layer 15.

  The elastic member 16 is divided into a large number of elastic divided bodies 16a along the tire circumferential direction, and each elastic divided body 16a is a plate body having a rectangular shape in plan view long in the tire circumferential direction, as shown in FIG. Thus, one elastic division body 16a has connected two ring division bodies 12a in the tire peripheral direction. Further, by connecting the two elastic divided bodies 16a to one ring divided body 12a, the elastic member 16 extends over the entire circumference in the tire circumferential direction, and a large number of ring divided bodies 12a are connected to the entire tire circumferential direction. It is connected over the circumference. In addition, two second through holes are formed at both ends in the tire circumferential direction of the elastic divided body 16a at intervals in the tire width direction H. The bolt 31 inserted into the insertion hole 33 as described above is screwed into the female screw of the female screw member 32 through the first through hole and the second through hole.

In the present embodiment, a plurality of storage grooves 34 are formed on the outer peripheral surface of the attachment body 11 at intervals in the tire circumferential direction, and the other end portions 21b and 22b of both the connecting plates 21 and 22 are stored. By being arranged in the groove 34, it is fixed to the attachment body 11.
The storage groove 34 is formed separately at both end portions 11 </ b> A and 11 </ b> B in the tire width direction H on the outer peripheral surface of the attachment body 11 and opens toward the outside in the tire width direction H. The other end portions 21b and 22b of the connecting plates 21 and 22 face or contact the inner wall surface facing the outer side in the tire width direction H from the outer side in the tire width direction H among the wall surfaces defining the storage groove 34. In the state of contact, the attachment body 11 is fixed separately to both end portions 11A and 11B in the tire width direction H.

  Further, the storage groove 34 is non-penetrating forward in the cutting direction of cutting from the outer peripheral surface of the attachment body 11 toward the inside thereof. The cutting direction is substantially the same as the direction from the other end toward the one end 21a, 22a side in each of the other end 21b, 22b of each of the connecting plates 21, 22 among the directions inclined with respect to the tire radial direction. Match. Further, on the outer peripheral surface of the attachment body 11, the storage groove 34 positioned at the first end portion 11A in the tire width direction H and the storage groove 34 positioned at the second end portion 11B in the tire width direction H The formation positions along the direction are different from each other.

  Furthermore, in this embodiment, the female thread part 11c opened in the accommodation groove | channel 34 is formed in the attachment body 11, and each other end part 21b, 22b of both the connection plates 21 and 22 was screwed by this female thread part 11c. The fixing bolt 35 is pressed against the wall surface defining the storage groove 34 and fixed. The female screw portion 11c extends in a direction intersecting (preferably orthogonal) to the cutting direction and the surfaces of the other end portions 21b and 22b of the connecting plates 21 and 22, and the tire width with respect to one storage groove 34 Two are arranged in the direction H at intervals.

Next, the manufacturing apparatus 40 for manufacturing the non-pneumatic tire 1 configured as described above will be described with reference to FIGS. 6 and 7.
In the non-pneumatic tire manufacturing apparatus 40, the outer peripheral surface portion 41 supports the ring-shaped body 12 from the inner peripheral surface 12b side, and the inner peripheral surface portion 43 includes a plurality of first connecting plates. 21 and an annular outer support 44 that supports the ring-shaped body 12 connected to the attachment body 11 from the outer peripheral surface 12c side. In the following, the axis of the inner support 42 is referred to as a first axis O1, and the axis of the outer support 44 is referred to as a second axis O2.

As shown in FIG. 6, the size of the inner support 42 along the first axis O <b> 1 direction is smaller than the size along the tire width direction H of each of the attachment body 11 and the ring-shaped body 12. In the following, in the inner support body 42, a direction orthogonal to the first axis O1 is referred to as a first radial direction.
On the outer peripheral surface portion 41 of the inner support body 42, a large number of positioning grooves 45 for positioning the plurality of ring division bodies 12a around the first axis O1 are formed at intervals around the first axis O1. ing.

In this embodiment, each positioning groove 45 opens on both sides in the first axis O1 direction, and the size of each positioning groove 45 around the first axis O1 is equal to the size of the ring divided body 12a in the tire circumferential direction. Are equal. Further, the interval between the positioning grooves 45 adjacent to each other around the first axis O1 is equal to the size of the gap provided between the ring divided bodies 12a adjacent to each other in the tire circumferential direction in the ring-shaped body 12. Yes. Further, the distance along the first radial direction from the first axis O1 to the bottom surface 45a of each positioning groove 45 is equal to the inner diameter of the ring-shaped body 12.
In the illustrated example, the bottom surface 45a of each positioning groove 45 is located on one side in the first axis O1 direction, on the other side in the first axis O1 direction, and more than the inner bottom surface 45b. And an outer bottom surface 45c projecting outward in the first radial direction.

The inner support 42 is formed with a housing hole 47 that is arranged coaxially with the inner support 42 and that the inner peripheral surface portion 46 supports the attachment body 11 from the outer peripheral surface side. The storage hole 47 has a circular shape when viewed from the direction of the first axis O <b> 1 and has an inner diameter equal to the outer diameter of the attachment body 11.
In the illustrated example, an internal thread portion 48 is formed on the outer peripheral surface portion 41 of the inner support 42. Two female screw portions 48 are formed on the outer bottom surface 45c of each positioning groove 45 with a space in the direction of the first axis O1. Further, in a portion of the inner support 42 that is located between the storage hole 47 and the outer peripheral surface portion 41, a thinned portion that penetrates the inner support 42 in the first axis O1 direction is provided around the first axis O1. A plurality are formed at intervals.

As shown in FIG. 7, the outer support body 44 is formed in an annular shape, and the size of the outer support body 44 along the second axis O2 direction is the tire width direction H of the intermediate portion of the ring-shaped body 12. It is equal to the size along. In the following, in the outer support 44, the direction orthogonal to the second axis O2 is referred to as a second radial direction.
On the inner peripheral surface portion 43 of the outer support body 44, relative positioning in the tire circumferential direction of the outer support body 44 and the ring-shaped body 12 connected to the mounting body 11 by the plurality of first connecting plates 21 is performed. A positioning portion 49 is formed. In the present embodiment, the positioning portion 49 is a concave groove formed in the inner peripheral surface portion 43 of the outer support 44 with a large number of intervals around the second axis O2.

  In the illustrated example, each positioning portion 49 opens on both sides in the second axis O2 direction, and the size of each positioning portion 49 around the second axis O2 is equal to the size of the ring divided body 12a in the tire circumferential direction. ing. Further, the interval between the positioning portions 49 adjacent to each other around the second axis O2 is equal to the size of the gap provided between the ring divided bodies 12a adjacent in the tire circumferential direction in the ring-shaped body 12. . Furthermore, the distance along the second radial direction from the second axis O2 to the bottom surface 49b of each positioning portion 49 is equal to the outer diameter of the ring-shaped body 12.

Further, in the illustrated example, the outer support body 44 is formed with fourth bolt insertion holes 50 that penetrate the outer support body 44 in the second radial direction and open individually to the bottom surfaces 49b of the positioning portions 49. ing. Two fourth bolt insertion holes 50 are formed at intervals in the second axis O2 direction on each bottom surface 49b.
Furthermore, the outer side support body 44 is formed so as to be divided into a plurality of (four in the illustrated example) divided support bodies 44a along the tire circumferential direction.

  Next, a method for manufacturing the non-pneumatic tire 1 using the non-pneumatic tire manufacturing apparatus 40 configured as described above will be described with reference to FIGS. 8 to 11. In addition, below, the process after forming the attachment body 11, the ring-shaped body 12, the connection member 13, the tread member 14, the reinforcement layer 15, and the elastic member 16 is demonstrated.

First, as shown in FIGS. 8 and 9, a ring-shaped body support process is performed in which the ring-shaped body 12 is supported from the inner peripheral surface 12 b side by the outer peripheral surface portion 41 of the inner support 42.
In this step, first, the ring divided body 12 a is disposed in the positioning groove 45. Here, in the present embodiment, the outer peripheral surface portion 41 of the inner support 42 supports a portion located on the second end 12B side (one side in the tire width direction H) of the ring-shaped body 12 relative to the first end 12A. Thus, the first end 12A is exposed. As shown in FIG. 9, in the illustrated example, when the ring divided body 12 a is disposed in the positioning groove 45, the back surface of the second end 12 </ b> B of the ring divided body 12 a is the outer bottom surface 45 c of the positioning groove 45. And the rear surface of the intermediate portion of the ring divided body 12a is disposed so as to contact the inner bottom surface 45b of the positioning groove 45 so that the first end 12A of the ring divided body 12a is exposed. It has become. At this time, the insertion hole 33 formed in the second end portion 12B of the ring divided body 12a and the female screw portion 48 formed in the outer peripheral surface portion 41 of the inner support 42 are arranged coaxially with each other. It has become.

  Here, the ring divided body 12a disposed in the positioning groove 45 is an inner support bolt inserted into the outer peripheral surface portion 41 of the inner support 42 into the insertion hole 33 formed in the ring divided body 12a. 51 is fixed. In the illustrated example, the inner support bolt 51 is inserted into the insertion hole 33 from the outside in the first radial direction and screwed into the female screw portion 48, and the inner support 42 and the head of the inner support bolt 51 are ringed. The ring divided body 12a is fixed to the outer peripheral surface portion 41 of the inner support 42 by sandwiching the divided body 12a in the first radial direction.

Then, by arranging and fixing the ring divided bodies 12a in the same manner in each ring divided body 12a, the inner support 42 and the ring-shaped body 12 are arranged coaxially, and the inner support 42 The ring-shaped body 12 can be supported by the outer peripheral surface portion 41 from the inner peripheral surface 12b side.
The ring-shaped body support process is thus completed.

Moreover, the attachment body support process which supports the attachment body 11 from the outer peripheral surface side by the inner peripheral surface part 46 of the accommodation hole 47 is performed.
In this step, for example, the inner support 42 is placed on a work table (not shown) so that the inner bottom surface 45b of the positioning groove 45 is located above the outer bottom surface 45c, and the attachment body 11 and the inner support body The attachment body 11 is accommodated in the accommodation hole 47 while being aligned with the coaxial 42. Here, in the present embodiment, the inner peripheral surface portion 46 of the storage hole 47 supports a portion of the attachment body 11 that is located on the second end portion 11B side with respect to the first end portion 11A, and exposes the first end portion 11A. It is configured to let you. In the illustrated example, the size of the inner support body 42 along the first axis O1 direction is smaller than the size of the attachment body 11 along the tire width direction H. When the end portion 11B enters the storage hole 47 until it abuts on the work table, the portion of the mounting body 11 that is located on the second end portion 11B side of the first end portion 11A is the inner peripheral surface portion 46 of the storage hole 47. Then, the first end portion 11A of the attachment body 11 is exposed.

  Here, since the accommodation hole 47 is positioned coaxially with the inner support 42, the axis O of each of the ring-shaped body 12 and the mounting body 11 is obtained by performing the ring-shaped body supporting step and the mounting body supporting step. Both can be fixed in a state of matching. Thus, the first axis O1 direction and the tire width direction H, the first radial direction and the tire radial direction, the first axis O1 and the tire circumferential direction coincide with each other.

And after these ring-shaped body support processes and attachment body support processes, both ends 21a and 21b of the first connecting plate 21 are fixed to the first ends 11A and 12A of the ring-shaped body 12 and the mounting body 11, respectively. And the 1st connection process which connects the ring-shaped body 12 and the attachment body 11 with the 1st connection board 21 is performed.
In this step, when the one end portion 21a of the first connecting plate 21 is fixed to the first end portion 12A of the ring-shaped body 12, the first end portion 12A in the tire width direction H within the ring-shaped body 12 is elastic. The divided body 16a, the one end 21a of the first connecting plate 21 and the female screw member 32 are arranged in this order from the outer side to the inner side in the tire radial direction, and then the insertion hole 33 formed in the ring-shaped body 12 and the elastic divided body A bolt 31 is inserted into the second through hole formed in 16 a and the first through hole formed in one end 21 a of the first connecting plate 21, and then screwed into the female screw of the female screw member 32 to be fixed.

Further, in this step, when the other end portion 21b of the first connecting plate 21 is fixed to the first end portion 11A of the attachment body 11, the other end portion 21b is disposed in the storage groove 34 and then attached to the attachment body 11. A fixing bolt 35 is screwed onto the formed female screw portion 11c, and the other end portion 21b is pressed against and fixed to the wall surface defining the storage groove 34.
As described above, the ring-shaped body 12 and the attachment body 11 are coupled by the first coupling plate 21. And the intermediate member 52 by which the ring-shaped body 12 and the attachment body 11 are connected by the some 1st connection board 21 is formed by performing connection by this 1st connection board 21 over the perimeter of a tire peripheral direction. The first connecting step is finished.

Next, a support releasing step of releasing the support of the ring-shaped body 12 by the outer peripheral surface portion 41 of the inner support 42 and the support of the attachment body 11 by the inner peripheral surface portion 46 of the storage hole 47 is performed.
In this step, first, the inner support bolt 51 is removed from the female thread portion 48 formed on the outer peripheral surface portion 41 of the inner support member 42 to release the ring-shaped member 12 from being fixed to the outer peripheral surface portion 41. Then, the inner support 42 is directed toward one side in the tire width direction H with respect to the intermediate member 52 so that the inner support 42 is extracted from the ring-shaped body 12 and the second end portions 11B and 12B side of the attachment body 11. By moving relatively, the support of the ring-shaped body 12 by the outer peripheral surface portion 41 of the inner support 42 and the support of the attachment body 11 by the inner peripheral surface portion 46 of the storage hole 47 are released.

Next, as shown in FIGS. 10 and 11, an intermediate member supporting step is performed in which the ring-shaped body 12 in the intermediate member 52 is supported from the outer peripheral surface 12 c side by the inner peripheral surface portion 43 of the outer support 44.
In this step, first, the divided support body 44a is attached to the intermediate member 52 so that the plurality of ring divided bodies 12a are separately arranged in the plurality of positioning portions 49 formed on the inner peripheral surface portion 43 of the divided support body 44a. In contrast, it is positioned and arranged in the tire circumferential direction. Here, in the present embodiment, the inner peripheral surface portion 43 of the outer support 44 is a portion located on the first end 12A side (the other side in the tire width direction H) of the ring-shaped body 12 with respect to the second end 12B. The second end 12B is supported and exposed. In the illustrated example, the size of the split support body 44a along the second axis O2 direction is equal to the size of the intermediate portion of the ring-shaped body 12 along the tire width direction H, so the split support body 44a. By aligning the position in the tire width direction H with the intermediate portion of the ring-shaped body 12, the second end portion 12B of the ring-shaped body 12 is exposed. At this time, the first bolt insertion hole 12d formed in the ring-shaped body 12 and the fourth bolt insertion hole 50 formed in the divided support body 44a are arranged coaxially with each other.

Here, as shown in FIG. 11, the ring-shaped body 12 has an outer support inserted into the first bolt insertion hole 12 d formed in the ring-shaped body 12 on the inner peripheral surface portion 43 of the divided support body 44 a. It is fixed by body bolts 53. In the illustrated example, the outer support bolt 53 is inserted into the fourth bolt insertion hole 50 formed in the divided support body 44a from the outside in the second radial direction, and is screwed into the first bolt insertion hole 12d. The ring-shaped body 12 is fixed to the inner peripheral surface portion 43 of the divided support body 44a by pressing the divided support body 44a against the ring-shaped body 12 from the outside in the second radial direction with the head of the bolt 53.
At this time, for example, when an internal thread is not formed on the inner peripheral surface of the first bolt insertion hole 12d, the split support 44a and the ring-shaped body are used by using the outer support bolt 53 and a nut (not shown). The ring-shaped body 12 may be fixed to the inner peripheral surface portion 43 of the divided support body 44a by sandwiching 12 in the second radial direction with the head of the outer support body bolt 53 and the nut.

Then, by arranging and fixing the divided support bodies 44a for each of the plurality of divided support bodies 44a, the outer support body 44 and the ring-shaped body 12 are arranged coaxially, and the outer support body 44 is fixed. The ring-shaped body 12 of the intermediate member 52 can be supported from the outer peripheral surface 12c side by the inner peripheral surface portion 43. Accordingly, the second axis O2 direction and the tire width direction H, the second radial direction and the tire radial direction, and the second axis O2 and the tire circumferential direction coincide with each other.
The intermediate member supporting process is thus completed.

Next, both end portions 22a and 22b of the second connecting plate 22 are separately fixed to the second ends 11B and 12B of the ring-shaped body 12 and the mounting body 11 in the intermediate member 52, respectively, and the ring-shaped body 12 and the mounting body 11 are fixed. A second connecting step of connecting with the second connecting plate 22 is performed.
In this step, first, the intermediate member 52 is operated so that the second end portions 11B and 12B of the ring-shaped body 12 and the attachment body 11 of the intermediate member 52 are positioned above the first end portions 11A and 12A, respectively. Place on the table.

  In this step, when the one end 22a of the second connecting plate 22 is fixed to the second end 12B of the ring-shaped body 12, the second end 12B in the tire width direction H in the ring-shaped body 12 is The elastic divided body 16a, the one end portion 22a of the second connecting plate 22 and the female screw member 32 are arranged in this order from the outer side to the inner side in the tire radial direction, and then the insertion hole 33 formed in the ring-shaped body 12 and the elastic division Bolts 31 are inserted into the second through holes formed in the body 16 a and the first through holes formed in the one end 22 a of the second connecting plate 22, and then screwed into the female screw of the female screw member 32 to be fixed.

In this step, when the other end portion 22b of the second connecting plate 22 is fixed to the second end portion 11B of the attachment body 11, the other end portion 22b is disposed in the storage groove 34 and then attached to the attachment body 11. A fixing bolt is screwed onto the formed female screw portion 11c, and the other end portion 22b is pressed against the wall surface defining the storage groove 34 and fixed.
As described above, the ring-shaped body 12 and the attachment body 11 are coupled by the second coupling plate 22. And a 2nd connection process is complete | finished by performing the connection by this 2nd connection board 22 over the perimeter of a tire peripheral direction.

Next, an outer support release step for releasing the support of the ring-shaped body 12 by the inner peripheral surface portion 43 of the outer support 44 is performed. In this step, the fixing of the ring-shaped body 12 to the inner peripheral surface portion 43 of the outer support 44 is released by removing the outer support bolt 53 from the first bolt insertion hole 12d formed in the ring-shaped body 12. Thereafter, each divided support body 44 a is detached from the ring-shaped body 12, and the support of the ring-shaped body 12 by the inner peripheral surface portion 43 of the outer support body 44 is released.
And after that, while arrange | positioning the tread member 14 in the outer peripheral surface 12c side of the ring-shaped body 12 over the perimeter, and arrange | positioning the reinforcement layer 15 between the ring-shaped body 12 and the tread member 14, A non-pneumatic tire 1 can be formed.

As described above, according to the non-pneumatic tire manufacturing apparatus 40 according to this embodiment, the inner support 42 is formed with the storage hole 47 arranged coaxially with the inner support 42. Therefore, the outer peripheral surface portion 41 of the inner support 42 supports the ring-shaped body 12 from the inner peripheral surface 12b side, and the inner peripheral surface portion 46 of the storage hole 47 supports the attachment body 11 from the outer peripheral surface side. Both can be fixed in a state in which the axis O of each of the ring-shaped body 12 and the attachment body 11 is matched.
In addition, the outer peripheral surface portion 41 of the inner support 42 is configured to support a portion of the ring-shaped body 12 that is located closer to the second end 12B than the first end 12A to expose the first end 12A. The inner peripheral surface portion 46 of the storage hole 47 is configured to support a portion of the attachment body 11 located on the second end portion 11B side with respect to the first end portion 11A and expose the first end portion 11A. Therefore, both end portions 21a and 21b of the first connecting plate 21 can be easily fixed to the ring-shaped body 12 and the mounting body 11 which are fixed in a state where the respective axes O coincide with each other.
As described above, the non-pneumatic tire 1 is formed by making the axial lines O of the attachment body 11 and the ring-shaped body 12 coincide with each other and the deformation states of the plurality of first connecting plates 21 are made uniform over the entire circumference in the tire circumferential direction. It is possible to improve uniformity and ride comfort, and it is easy to connect the attachment body 11 and the ring-shaped body 12 by the first connection plate 21 in the manufacturing process for all the first connection plates 21. Can be done. Therefore, the non-pneumatic tire 1 can be formed with high accuracy and high efficiency.

  Further, like the non-pneumatic tire 1 shown in the present embodiment, when the first connecting plate 21 is curved so as to be convex toward the tire circumferential direction in the tire side view, a plurality of Since each deformation state of the first connecting plate 21 is likely to vary greatly in the tire circumferential direction, the above-described effects are remarkably achieved.

  In addition, since the positioning groove 45 is formed in the outer peripheral surface portion 41 of the inner support body 42 at a distance from each other around the axis O, as in the non-pneumatic tire 1 shown in the present embodiment, Even in the case where the ring-shaped body 12 is composed of a large number of ring-divided bodies 12a, the above-described effects are remarkably achieved.

  Further, since the outer support 44 is provided, the ring-shaped body 12 and the attachment body 11 are connected by the first connecting plate 21, and then the ring-shaped body 12 is supported and stored by the outer peripheral surface portion 41 of the inner support 42. The support of the attachment body 11 by the inner peripheral surface portion 46 of the hole 47 is released, and the ring-shaped body 12 and the attachment body 11 are first supported by the outer support body 44 supporting the ring-shaped body 12 from the outer peripheral surface 12c side. Combined with being connected by the one connecting plate 21, the ring-shaped body 12 and the attachment are attached by the second connecting plate 22 while maintaining the state where the axis O of each of the ring-like body 12 and the attaching body 11 coincides. The bodies 11 can be connected. Therefore, even when the connecting member 13 includes the first connecting plate 21 and the second connecting plate 22 as in the non-pneumatic tire 1 shown in the present embodiment, the non-pneumatic tire 1 can be formed with high accuracy. it can.

  Further, the inner peripheral surface portion 43 of the outer support 44 supports a portion of the ring-shaped body 12 that is located closer to the first end portion 12A than the second end portion 12B so that the second end portion 12B is exposed. Since it is configured, for example, like the non-pneumatic tire 1 shown in the present embodiment, the one end portion 22a of the second connecting plate 22 is inserted into the insertion hole 33 formed in the second end portion 12B of the ring-shaped body 12. Even when a configuration is adopted in which the bolt 31 inserted from the outside in the tire radial direction is fixed to the inner peripheral surface 12b side of the ring-shaped body 12, the ring-shaped body 12 is connected to the outer peripheral surface 12c side by the outer support 44. The one end 22a can be fixed to the ring-shaped body 12 in a state where it is supported from above. Therefore, after forming the non-pneumatic tire 1 with high accuracy, the one end 22a of the second connecting plate 22 and the second end 12B of the ring-shaped body 12 can be easily fixed. The increase in cost of the pneumatic tire 1 can be suppressed.

  In addition, according to the non-pneumatic tire 1 by this embodiment, the attachment body 11 and the ring-shaped body 12 are comprised by the connection member 13 provided with two or more along the tire circumferential direction, and an inside is a rubber material. Since the solid structure is not filled, the occurrence of puncture can be prevented while suppressing the increase in weight, hardness and rolling resistance and ensuring good riding comfort and maneuverability.

  In addition, the connecting member 13 is a first connecting plate 21 that is curved so as to be convex toward one side in the tire circumferential direction and a second that is curved so as to be convex toward the other side in the tire side view. Since the connecting plate 22 is provided, external force acts on the non-pneumatic tire 1 so that the attachment body 11 and the ring-shaped body 12 are relatively in the tire radial direction, the tire circumferential direction, or the tire width direction H. When displaced, the first connecting plate 21 and the second connecting plate 22 can be easily elastically deformed in accordance with the displacement, and the non-pneumatic tire 1 can be provided with flexibility. The transmission of vibration to the vehicle can be suppressed, and good ride comfort can be ensured.

  Furthermore, since each connecting member 13 is axisymmetric with respect to the virtual line L in the side view of the tire, the spring constant along one side in the tire circumferential direction and the other side of the non-pneumatic tire 1 are along. It is possible to suppress a difference between the spring constant and the spring constant. Therefore, in a state where the non-pneumatic tire 1 is grounded, the difference between the spring constant along the traveling direction and the spring constant along the braking direction in the grounded portion of the tire 1 can be suppressed, and good maneuverability is achieved. Can be ensured.

  Furthermore, since the ring-shaped body 12 is divided into a large number of ring divided bodies 12 a along the tire circumferential direction, the flexibility of the ring-shaped body 12 is enhanced and the external force acting on the non-pneumatic tire 1 is increased. Accordingly, not only the first connecting plate 21 and the second connecting plate 22 but also the ring-shaped body 12 can be easily deformed. Therefore, it is possible to suppress the variation in the contact pressure within the contact surface, and it is possible to more reliably ensure good riding comfort and to prevent uneven wear on the tread member 14. .

  Furthermore, since the ring-shaped body 12 is divided into a large number of ring divided bodies 12a along the tire circumferential direction as described above, the non-pneumatic tire 1 can be easily formed. When a part of the ring-shaped body 12 is damaged, it is sufficient to replace only the damaged portion without replacing the entire ring-shaped body 12, and it is possible to improve maintainability.

In addition, since the elastic member 16 that extends along the tire circumferential direction and connects a large number of ring divided bodies 12a in the tire circumferential direction is provided in the ring-shaped body 12, the deformation of the ring-shaped body 12 It becomes possible to regulate the amount, and by dividing the ring-shaped body 12 into a large number of ring divided bodies 12a, it is possible to suppress the flexibility of the ring-shaped body 12 from becoming excessively high.
Therefore, the variation in the contact pressure within the contact surface can be reliably suppressed, and the ring-shaped body 12 is divided into a large number of ring divided bodies 12a, thereby increasing the rolling resistance of the non-pneumatic tire 1. Or it can suppress that the load concerning both the connection plates 21 and 22 becomes high.

  Among these, since it becomes possible to suppress that the load concerning both the connection plates 21 and 22 becomes high, in order to divide the ring-shaped body 12 into many ring division bodies 12a, both connection plates 21, It is not necessary to increase the bending rigidity of 22 and improve its durability, and it is possible to suppress an increase in the weight of these connecting plates 21 and 22. Therefore, it is possible to prevent the weight of the non-pneumatic tire 1 from increasing as the ring-shaped body 12 is divided into a large number of ring divided bodies 12a.

  Furthermore, since a large number of ring divided bodies 12a are connected in the tire circumferential direction by elastic members 16 instead of rigid bodies, it is possible to prevent the ground contact area from being greatly reduced, and the load received from the road surface Is distributed over a wide range of the non-pneumatic tire 1 through the elastic member 16, so that it is possible to prevent a portion where a large load is locally applied, and durability can be improved.

  Furthermore, since the first connecting plate 21 and the second connecting plate 22 are each formed of a metal material or a resin material, it is possible to substantially eliminate the occurrence of hysteresis loss, and to further reduce the rolling resistance. it can.

  Moreover, in this embodiment, since each other end part 21b, 22b of the 1st connection board 21 and the 2nd connection board 22 is being fixed to the attachment body 11 by arrange | positioning in the storage groove 34, for example, joining or Compared with the case where the other end portions 21b, 22b of both connecting plates 21, 22 are fixed to the outer peripheral surface of the attachment body 11 by bonding or the like, the other end portions 21b, 22b of both connection plates 21, 22 are attached to the attachment body 11. Can be attached with high accuracy and can be easily attached and detached.

  Furthermore, since the other end portions 21b and 22b of both the connecting plates 21 and 22 are arranged in the storage groove 34 and fixed to the attachment body 11 in this way, for example, both connecting plates 21 and Compared with the case where the other end portions 21b and 22b of the fixing body 11 are fixed to the outer peripheral surface of the mounting body 11, the mounting allowance of the other end portions 21b and 22b of the connecting plates 21 and 22 occupying the outer peripheral surface of the mounting body 11 is reduced. It becomes possible to keep it narrow. Therefore, while maintaining the number of connecting members 13 and the outer diameter of the attachment body 11, the attachment allowance is widened to improve the fixing strength between the other end portions 21 b and 22 b of both the connection plates 21 and 22 and the attachment body 11. It can be easily realized.

  Furthermore, since the storage groove 34 is non-penetrating forward in the cutting direction, an external force such as the weight of the vehicle body acts on the non-pneumatic tire 1 to cause the attachment body 11 and the ring-shaped body 12 to move relative to each other. In other words, the other end portions 21b and 22b of the connecting plates 21 and 22 are brought into contact with the front end surface in the cutting direction among the wall surfaces that define the storage groove 34 when moving closer to the tire radial direction. It becomes possible. Therefore, compared with the case where each other end 21b, 22b of both connecting plates 21, 22 is fixed to the outer peripheral surface of the attachment body 11 by, for example, bonding or adhesion, each other end 21b of both connecting plates 21, 22; The durability and strength of the fixing portion between 22b and the attachment body 11 can be improved.

  Further, the storage groove 34 is directed from the outer peripheral surface of the mounting body 11 to the inside along the direction from the other end toward the one end 21a, 22a side at each of the other end 21b, 22b of each of the connecting plates 21, 22. Therefore, the other end portions 21b and 22b of both the connecting plates 21 and 22 can be easily entered into the storage groove 34, and the cost increase of the non-pneumatic tire 1 can be suppressed. it can. Furthermore, since the other end portions 21b and 22b of both the connecting plates 21 and 22 are formed in a flat or single arc shape, both the connecting plates 21 and 22 can be easily formed, and non-air The cost increase of the entering tire 1 can be reliably suppressed.

Further, in the present embodiment, the other end portions 21 b and 22 b of both the connecting plates 21 and 22 are formed on the wall surface defining the storage groove 34 by the fixing bolt 35 screwed to the female screw portion 11 c formed on the attachment body 11. Since it is pressed and fixed, it can suppress reliably that each other end part 21b and 22b of both these connection plates 21 and 22 remove | deviates from the accommodation groove | channel 34. FIG.
Furthermore, in the present embodiment, an external force acts on the non-pneumatic tire 1 and the attachment body 11 and the ring-shaped body 12 are relatively displaced relatively in the tire width direction, and the other of the connecting plates 21 and 22 is the other. Even if the end portions 21b and 22b are displaced from the storage groove 34 toward the outside in the tire width direction H, the other end portions 22b and 21b come into contact with the inner wall surface of the storage groove 34. The one other end 21b, 22b can be prevented from being detached from the storage groove 34.

Moreover, in this embodiment, since the clearance of the tire circumferential direction is provided between the ring division bodies 12a adjacent in a tire circumferential direction, it becomes possible to improve the softness | flexibility of the non-pneumatic tire 1 reliably. Further, since a gap in the tire radial direction is provided between a portion of the elastic member 16 located between the ring divided bodies 12a adjacent to each other in the tire circumferential direction and the inner circumferential surface of the reinforcing layer 15, the road surface It is possible to reliably transmit the load received from both the connecting plates 21 and 22, and the above-described effects can be reliably achieved, and the tread member 14 and the reinforcing layer 15 are provided on the outer peripheral surface 12 c side of the ring-shaped body 12. Can be easily mounted.
Furthermore, in this embodiment, since the elastic member 16 is divided into a large number of elastic divided bodies 16a along the tire circumferential direction, the elastic member 16 having the above-described effects can be easily formed, It can be easily installed.
Furthermore, in this embodiment, since the tread member 14 is disposed on the outer peripheral surface side of the ring-shaped body 12 over the entire circumference, the ride comfort, grip performance, and durability of the non-pneumatic tire 1 are improved. It can certainly be improved.

Moreover, in this embodiment, each end part 21a, 22a of both the connection plates 21 and 22 is ring-shaped body 12 with the bolt 31 inserted from the outer side of the tire radial direction in the insertion hole 33 formed in the ring-shaped body 12. Since it is being fixed to the inner peripheral surface 12b side, it is possible to easily fix and release the one end portions 21a, 22a of the connecting plates 21, 22 and the inner peripheral surface 12b side of the ring-shaped body 12 from each other. Thus, the cost increase of the non-pneumatic tire 1 can be suppressed.
Furthermore, since the head portion of the bolt 31 is accommodated in the counterbore hole 33a of the insertion hole 33, it is possible to prevent the head portion of the bolt 31 from protruding from the outer peripheral surface 12c of the ring-shaped body 12. Interference between the head of the bolt 31 and the inner peripheral surface of the reinforcing layer 15 can be prevented.

Further, when the bolt 31 is screwed into the female screw of the female screw member 32, the one end portions 21 a and 22 a of both the connecting plates 21 and 22 are sandwiched between the female screw member 32 and the ring-shaped body 12 in the tire radial direction and are ring-shaped. Since it is being fixed to the inner peripheral surface 12b side of the body 12, each end part 21a, 22a of both the connection plates 21 and 22 can be firmly fixed to the inner peripheral surface 12b side of the ring-shaped body 12.
Furthermore, since the female screw member 32 is a plate body on which a plurality of female screws are formed and a plurality of bolts 31 are provided, the one end portions 21a and 22a of both the connecting plates 21 and 22 and the ring-shaped body 12 are provided. It is possible to prevent an increase in the number of female screw members 32 due to the use of a plurality of bolts 31 in order to increase the fixing strength on the inner peripheral surface 12b side.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the non-pneumatic tire manufacturing apparatus 40 includes the inner support 42 and the outer support 44, but is not limited thereto, and includes only the inner support 42. There may be. In the non-pneumatic tire manufacturing method using such a non-pneumatic tire manufacturing apparatus, the intermediate member supporting step and the outer support releasing step are not performed, and the second connecting step is a ring-like shape in the intermediate member 52. This is performed in a state where the body 12 is not supported by the inner peripheral surface portion 43 of the outer support 44.

In addition, the ring-shaped body 12 is fixed to the outer peripheral surface portion 41 of the inner support 42 by the inner support bolt 51 inserted in the insertion hole 33 formed in the ring-shaped body 12. The body 12 may not be fixed to the outer peripheral surface portion 41 of the inner support 42. In this case, for example, the ring-shaped body 12 may be externally fitted to the outer peripheral surface portion 41 of the inner support 42.
Further, the ring-shaped body 12 of the intermediate member 52 is fixed to the inner peripheral surface portion 43 of the outer support body 44 by the outer support bolt 53 inserted into the first bolt insertion hole 12 d formed in the ring-shaped body 12. However, the ring-shaped body 12 may not be fixed to the inner peripheral surface portion 43 of the outer support 44. In this case, for example, the outer support body 44 may be formed non-divided around the second axis O <b> 2, and the ring-shaped body 12 may be fitted into the inner peripheral surface portion 43 of the outer support body 44.

Moreover, in the said embodiment, although the internal peripheral surface part 43 of the outer side support body 44 shall support the part located in the 1st end part 12A side rather than the 2nd end part 12B in the ring-shaped body 12, to this, For example, the second end 12B may be supported.
Moreover, in the said embodiment, the 1st fixing | fixed part to which both ends 21a and 21b of the 1st connection board 21 are fixed is made into 1st end part 11A, 12A in the ring-shaped body 12 and the attachment body 11, respectively, and 2nd The second fixing portions to which the both end portions 22a and 22b of the connecting plate 22 are fixed are the second end portions 11B and 12B in the ring-shaped body 12 and the attachment body 11, respectively. If it is located in the one side of the tire width direction H rather than the said 1st fixing | fixed part, it will not be restricted to this. For example, the first fixing portion may be a central portion in the tire width direction H in each of the ring-shaped body 12 and the attachment body 11.

Furthermore, in the said embodiment, although the 1st connection plate 21 and the 2nd connection plate 22 shall be curved so that it may become convex toward a tire circumferential direction in the said tire side view, it is restricted to this. It does not have to be convex in the tire circumferential direction.
Furthermore, the material which forms the 1st connection board 21 and the 2nd connection board 22 is not restricted to the said embodiment, You may change suitably.

  Moreover, in the said embodiment, although the structure provided with the 1st connection board 21 and the 2nd connection board 22 each as the connection member 13 was shown, it is not restricted to this. For example, the connecting member 13 may not include the second connecting plate 22. Furthermore, a configuration in which a plurality of first connecting plates 21 and a plurality of second connecting plates 22 are provided in one connecting member 13 with different positions in the tire width direction H may be employed.

  Further, the other end portions 21b and 22b of the first connecting plate 21 and the second connecting plate 22 are opposite to each other, for example, on the outer peripheral surface of the mounting body 11 with the axis O in the tire radial direction instead of the embodiment. May be fixed separately at each position, or on the outer peripheral surface of the attachment body 11, the positions facing the one end portions 21a, 22a of the first connecting plate 21 and the second connecting plate 22 in the tire radial direction. You may fix to etc.

Furthermore, in the said embodiment, although each end part 21a, 22a of both the connection plates 21 and 22 in the one connection member 13 was fixed to one ring division body 12a, several ring adjacent to each other in the tire circumferential direction You may fix over the division body 12a.
Further, instead of the above-described embodiment, the one end portions 21a and 22a of both the connecting plates 21 and 22 may be fixed to the inner peripheral surface 12b side of the ring-shaped body 12 at different positions in the tire circumferential direction.

Moreover, it replaces with the elastic member 16 shown in the said embodiment, for example, is formed with steel etc., and is extended along the tire circumferential direction with the bundle wire, the single wire or the stranded wire extended along the tire circumferential direction. A coil spring may be used.
Moreover, if the arrangement | positioning position of the elastic member 16 shown in the said embodiment is a position which can connect many ring division bodies 12a in the tire circumferential direction in the ring-shaped body 12, for example, a ring-shaped body The inner peripheral surface 12b of the twelve inner peripheral surface 12b may be changed as appropriate, for example, in the center portion in the tire width direction H.
The elastic member 16 may be continuously extended over the entire circumference along the tire circumferential direction.
Furthermore, in place of the embodiment, the reinforcing layer 15 is bonded to the outer peripheral surface 12c of the ring-shaped body 12 with an adhesive or the like, and the outer peripheral surface is bonded to the inner peripheral surface of the tread member 14 with an adhesive or the like. May be fixed. Further, the reinforcing layer 15 may not be provided.

Furthermore, in the said embodiment, each end part 21a, 22a of both the connection plates 21 and 22 is ring-shaped with the bolt 31 inserted from the outer side of the tire radial direction in the insertion hole 33 formed in the ring-shaped body 12. 12 is fixed to the inner peripheral surface 12b side, but instead may be fixed to the inner peripheral surface 12b side of the ring-shaped body 12 by, for example, bonding or adhesion. Further, a female screw is formed in the ring-shaped body 12 instead of the insertion hole 33, and the bolts 31 are screwed into the female screw from the inner side in the tire radial direction, so that the one end portions 21a, 22a of both the connecting plates 21, 22 are ring-shaped. You may fix to the inner peripheral surface 12b side of the shape body 12. FIG.
Moreover, the insertion hole 33 which does not have the counterbore hole 33a may be employ | adopted, and the volt | bolt 31 may be selected suitably not only in a flat head bolt.
Further, the female screw member 32 is not limited to the above embodiment, and may be appropriately selected, for example, a nut. Further, without providing the female screw member 32, a female screw is formed at each one end portion 21a, 22a of both the connecting plates 21, 22, and a bolt 31 is screwed into this female screw, so that each one end portion 21a, You may fix 22a to the inner peripheral surface 12b side of the ring-shaped body 12. FIG.

Furthermore, in the above-described embodiment, the storage groove 34 is formed on the outer peripheral surface of the mounting body 11. However, without forming the storage groove 34, the other end portions 21 b and 22 b of both the connecting plates 21 and 22 are joined, for example, You may fix to the outer peripheral surface of the attachment body 11 by adhesion | attachment etc.
Moreover, in the said embodiment, although the internal thread part 11c was formed in the attachment body 11, and the fixing bolt 35 was screwed by this internal thread part 11c, the structure which does not have the internal thread part 11c and the fixing bolt 35 may be employ | adopted.
Moreover, in the said embodiment, although the storage groove 34 was not penetrated ahead in the said cutting direction, you may penetrate. Further, although the storage groove 34 is opened toward the outside in the tire width direction H, it may be closed. If the storage groove 34 is an outer peripheral surface of the attachment body 11, both end portions 11A and 11B in the tire width direction H are used. However, the formation position may be changed as appropriate.

Furthermore, the ring-shaped body 12 and the elastic member 16 need not be divided into a large number along the tire circumferential direction.
As shown in FIGS. 12 and 13, in the non-pneumatic tire manufacturing apparatus 60 that manufactures a non-pneumatic tire including a ring-shaped body 63 that is not divided along the tire circumferential direction, an inner support body is provided. The positioning groove may not be formed in the outer peripheral surface portion 62 of 61. In the illustrated example, the outer diameter of the inner support body 61 is equal to the inner diameter of the ring-shaped body 63.

Moreover, in the said embodiment, although the clearance of the tire circumferential direction was provided between the ring division bodies 12a adjacent in the tire circumferential direction, the circumferential edge of the ring division bodies 12a adjacent in the tire circumferential direction is mutually adjacent, or You may contact | abut.
Further, the tread member 14 may not be provided on the outer peripheral surface 12c side of the ring-shaped body 12.
Further, the shape of the connecting member 13 in the side view of the tire may be asymmetric with respect to the virtual line L.

  In addition, it is possible to appropriately replace the constituent elements in the embodiment with known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

Next, the verification test about the effect demonstrated above was implemented.
As Example 1, a non-pneumatic tire manufactured by a non-pneumatic tire manufacturing method using a non-pneumatic tire manufacturing apparatus 40 including an inner support 42 and an outer support 44 is employed. A non-pneumatic tire manufactured by a non-pneumatic tire manufacturing method using a non-pneumatic tire manufacturing apparatus including only the inner support 42 is employed, and as a comparative example, without using a non-pneumatic tire manufacturing apparatus. The manufactured non-pneumatic tire was adopted. The tires of Examples 1 and 2 and the comparative example all have a tire width of 145 mm and a tire outer diameter of 562 mm.

And RFV and LFV were measured about each non-pneumatic tire of a comparative example and Example 1, 2, and based on the measurement result of these RFV and LFV, a comparative example was used as evaluation criteria (100), Example 1, 2 Each non-pneumatic tire was evaluated by an index.
The results are shown in Table 1.
In this table, RFV and LFV indicate that the smaller the numerical value, the better.

  As a result, it was confirmed that the non-pneumatic tires of Examples 1 and 2 can improve the RFV and LFV compared to the non-pneumatic tire of the comparative example.

DESCRIPTION OF SYMBOLS 1 Non-pneumatic tire 11 Attachment body 11A 1st edge part of attachment body (1st fixing | fixed part of an attachment body)
11B 2nd end part of attachment body (2nd fixing | fixed part of attachment body)
12, 63 Ring-shaped body 12A First end of ring-shaped body (first fixing portion of ring-shaped body)
12B Second end of ring-shaped body (second fixing section of ring-shaped body)
12a Ring division body 12b Inner circumferential surface of ring-shaped body 12c Outer circumferential surface of ring-shaped body 13 Connection member 21 First connection plate 22 Second connection plate 21a, 21b End portions 22a, 22b of first connection plate End portions 40, 60 Non-pneumatic tire manufacturing apparatus 41, 62 Inner support outer peripheral surface portion 42, 61 Inner support member 43 Outer support inner peripheral surface portion 44 Outer support member 45 Positioning groove 46 Inner peripheral surface portion of storage hole 47 storage hole 52 intermediate member H tire width direction O1 first axis (axis of inner support)

Claims (7)

An attachment attached to the axle;
A ring-shaped body surrounding the mounting body from the outside in the tire radial direction;
A plurality of connecting members that are provided along the tire circumferential direction and connect the attachment body and the ring-shaped body;
The connecting member is a non-pneumatic tire manufacturing apparatus that manufactures a non-pneumatic tire that includes first connecting plates whose both ends are separately fixed to the first fixing portions of the attachment body and the ring-shaped body, respectively. There,
The outer peripheral surface portion includes a disk-shaped inner support body that supports the ring-shaped body from the inner peripheral surface side thereof,
The inner support is formed coaxially with the inner support, and an inner peripheral surface portion is formed with a storage hole for supporting the attachment body from the outer peripheral surface side.
The outer peripheral surface portion of the inner support body is configured to support a portion located on one side in the tire width direction with respect to the first fixing portion in the ring-shaped body and expose the first fixing portion,
The inner peripheral surface portion of the storage hole is configured to support a portion located on one side in the tire width direction with respect to the first fixing portion in the attachment body so as to expose the first fixing portion. A non-pneumatic tire manufacturing apparatus. It is a manufacturing apparatus of the non-pneumatic tire according to claim 1,
In the outer peripheral surface portion of the inner support, positioning grooves for positioning a plurality of ring divided bodies obtained by dividing the ring-shaped body along the tire circumferential direction are individually arranged around the axis of the inner support, A large number of non-pneumatic tire manufacturing apparatuses, wherein a large number of them are formed around an axis at intervals. The apparatus for producing a non-pneumatic tire according to claim 1 or 2,
The connecting member includes a second connecting plate having both ends fixed separately to a second fixing portion positioned on one side in the tire width direction with respect to the first fixing portion in each of the attachment body and the ring-shaped body. Prepared,
A non-pneumatic tire characterized in that an inner peripheral surface portion includes an annular outer support that supports a ring-shaped member connected to the attachment body by a plurality of the first connecting plates from the outer peripheral surface side. Manufacturing equipment. It is a manufacturing apparatus of the non-pneumatic tire according to claim 3,
The inner peripheral surface portion of the outer support is configured to support a portion of the ring-shaped body that is located on the other side in the tire width direction with respect to the second fixing portion and expose the second fixing portion. An apparatus for producing a non-pneumatic tire, characterized in that: A non-pneumatic tire manufacturing method using the non-pneumatic tire manufacturing apparatus according to claim 1,
A ring-shaped body support step of supporting the ring-shaped body from the inner peripheral surface side by the outer peripheral surface portion of the inner support body;
An attachment body supporting step of supporting the attachment body from the outer peripheral surface side by the inner peripheral surface portion of the storage hole;
A first connecting step of fixing both ends of the first connecting plate to the first fixing portions of the ring-shaped body and the mounting body, respectively, and connecting the ring-shaped body and the mounting body with the first connecting plate; A method for producing a non-pneumatic tire, comprising: A non-pneumatic tire manufacturing method using the non-pneumatic tire manufacturing apparatus according to claim 3 or 4,
A ring-shaped body support step of supporting the ring-shaped body from the inner peripheral surface side by the outer peripheral surface portion of the inner support body;
An attachment body supporting step of supporting the attachment body from the outer peripheral surface side by the inner peripheral surface portion of the storage hole;
First ends for fixing the both ends of the first connecting plate to the first fixing portions of the ring-shaped body and the mounting body, respectively, and connecting the ring-shaped body and the mounting body with the first connecting plate to form an intermediate member. A connecting step;
A support releasing step of releasing the support of the ring-shaped body in the intermediate member by the outer peripheral surface portion of the inner support and the support of the attachment body in the intermediate member by the inner peripheral surface portion of the storage hole;
An intermediate member supporting step of supporting the ring-shaped body in the intermediate member from the outer peripheral surface side by the inner peripheral surface portion of the outer support;
A second connecting step of fixing both ends of the second connecting plate to the second fixing portions of the ring-shaped body and the mounting body of the intermediate member, respectively, and connecting the ring-shaped body and the mounting body with the second connecting plate; The manufacturing method of the non-pneumatic tire characterized by including these.   A non-pneumatic tire manufactured by the method for manufacturing a non-pneumatic tire according to claim 5 or 6.

Images