JP5624736B2 - Non pneumatic tire - Google Patents

Description

  The present invention relates to 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. Further, the connecting member of the non-pneumatic tire shown in Patent Document 1 below is a first member that is curved so as to be convex toward one side in the tire circumferential direction when the tire is viewed from the outside in the tire width direction. A connecting plate and a second connecting plate that is curved to be convex toward the other side.
In this type of non-pneumatic tire, for example, when a load is input from a road surface or the like, the connecting plate 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, in the conventional non-pneumatic tire, when the load is input, the deformation of both the fixed end portions separately fixed to the ring-shaped body and the attachment body in each of the both connecting plates is restricted. The intermediate portion located between the two fixed end portions is bent and deformed so as to reduce the curvature of curvature so as to be the convex. Thereby, the connection part of both the fixed end parts and the intermediate part is deformed so that the curvature changes greatly. Therefore, in each of the connecting plates, there is a possibility that a large load is locally generated on one end side portion on the ring-shaped body side and on the other end side portion on the attachment body side.

  The present invention has been made in view of the above-described circumstances, and the object thereof is to suppress the increase in weight and suppress the occurrence of a large load locally on both connecting plates to improve the strength. It is to provide a non-pneumatic tire that can.

In order to solve the above problems, the present invention proposes the following means.
The non-pneumatic tire according to the present invention includes a mounting body attached to an axle, a ring-shaped body surrounding the mounting body from the outside in the tire radial direction, and a plurality of the mounting body and the ring provided along a tire circumferential direction. A non-pneumatic tire provided with a connecting member that connects the body, and the connecting member is directed toward one side in the tire circumferential direction when the tire is viewed from the outside in the tire width direction. A first connecting plate curved to be convex and a second connecting plate curved to be convex toward the other side, and in each of these both connecting plates, one end side on the ring-shaped body side portion and at least one of the other end portion of the mounting side is the plate width is the size along the tire width direction, plate width positioned between these end side portion and the other end portion Is full length Greater than the plate width of the intermediate portion has a constant standing, and length, have been formed to be equal to or less than 0.30 times 0.14 times the length of said connecting plate, said two joining plates The inner edge in the tire width direction in each extends linearly over the entire length in plan view, and the width of at least one of the one end portion and the other end portion of each of the connecting plates is It is limited and larger toward the outer side in the tire width direction than the plate width of the intermediate portion.

  In this invention, in each of the connecting plates, at least one of the one end side portion and the other end side portion has a plate width larger than the plate width of the intermediate portion. It is possible to suppress the deformation of at least one of the non-pneumatic tires from being excessively large when a load is input from the road surface, for example. Therefore, it is possible to suppress the occurrence of a large load locally on the at least one side, and the strength of both the connecting plates can be improved.

In each of the connecting plates, the length of at least one of the one end side portion and the other end side portion is not less than 0.14 times and not more than 0.30 times the length of the connecting plate. While suppressing an increase in the weight of the non-pneumatic tire, it is possible to reliably increase the rigidity of at least one of the above and ensure good riding comfort.
That is, if the length of at least one is smaller than 0.14 times the length of the connecting plate, it may be difficult to sufficiently increase the rigidity compared to the intermediate portion. Further, if the length of at least one is greater than 0.30 times the length of the connecting plate, it may be difficult to suppress an increase in the weight of the non-pneumatic tire. The rigidity of the tire becomes too high, making it difficult to provide flexibility to the non-pneumatic tire, which may reduce ride comfort.

  Further, in at least one of the one end side portion and the other end side portion of each of the connecting plates, the connecting portion connected from the intermediate portion side to the fixed end portion fixed to the ring-shaped body or the attachment body is an intermediate portion. It may be formed so that the plate width gradually increases from the partial side toward the fixed end side.

  In this case, since the connection portion is formed so that the plate width gradually increases from the intermediate portion side toward the fixed end portion side, the rigidity of the connection portion is increased from the intermediate portion side to the fixed end portion side. It becomes possible to increase gradually as it goes to, and the strength of both connecting plates can be effectively improved.

  Further, the plate width of the intermediate portion of each of the connecting plates is not less than 0.33 times and not more than 0.80 times the plate width of the portion having the largest plate width at the one end side portion and the other end side portion of the connecting plate. May be.

In this case, the above-described effects can be reliably achieved and good maneuverability can be achieved.
That is, when the plate width of the intermediate portion of each of the connecting plates is larger than 0.80 times the plate width of the portion having the largest plate width at the one end side portion and the other end side portion of the connecting plate, the rigidity of the intermediate portion is set. On the other hand, the rigidity of the one end side portion and the other end side portion of the connecting plate may not be sufficiently increased. On the other hand, if the plate width of the intermediate portion of each of the connecting plates is smaller than 0.33 times the plate width of the largest portion of the connecting plate at one end portion and the other end portion, the rigidity of the intermediate portion May become too small to provide good maneuverability.

  According to the non-pneumatic tire according to the present invention, the strength can be improved by suppressing the occurrence of a large load locally on both the connecting plates while suppressing an increase in weight.

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) a side view showing the 1st connecting plate of the connecting member with which the non-pneumatic tire shown in Drawing 1-Drawing 5 was equipped, and (b) is a front view. It is a figure which shows the state which the 1st connection board deform | transformed when the load was input into the non-pneumatic tire shown in FIGS. 1-6 from the outer side of a tire radial direction.

Hereinafter, an embodiment of a non-pneumatic tire according to the present invention will be described with reference to FIGS. 1 to 7.
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 (fixed end portions) 21a and 22a of both the connecting plates 21 and 22 are fixed to the inner peripheral surface 12b side of the ring-shaped body 12, and the other end portions (fixed end portions) 21b and 22b. Is fixed to the attachment body 11.

  In the illustrated example, one end 21a, 22a of each of the connecting plates 21, 22 extends toward the opposite side of the tire circumferential direction in which the connecting plates 21, 22 are curved and convex. Yes. Furthermore, the other end portions 21b and 22b of the connecting plates 21 and 22 extend in a direction substantially orthogonal to the direction in which the one end portions 21a and 22a of the connecting plates 21 and 22 extend. Further, the one end portions 21a and 22a and the other end portions 21b and 22b of the connecting plates 21 and 22 are respectively formed in a flat or single arc shape. Furthermore, the plate thickness of both the connecting plates 21 and 22 is substantially constant over the entire length, for example, about 1.2 mm.

  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. These one end portions 21a and 22a are fixed to the inner peripheral surface 12b side of the ring-shaped body 12 with their positions in the tire width direction H being different from each other. In the illustrated example, the one end portions 21 a and 22 a of both the connecting plates 21 and 22 are separately fixed to both end portions in the tire width direction H 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. Further, the other end portions 21 b and 22 b of both the connecting plates 21 and 22 are respectively fixed to both end portions in the tire width direction H on the outer peripheral surface of the attachment body 11.

  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. Further, 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 a 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 of different tire width directions H are arranged along the tire circumferential direction. Furthermore, all the connecting members 13 have the same shape and size.

  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. Further, a plurality of first connection plates 21 are disposed at one end in the tire width direction H of the non-pneumatic tire 1, and the second connection plate 22 is the other end of the non-pneumatic tire 1 in the tire width direction H. A plurality are arranged in the section.

6 (a) and 6 (b), in the present embodiment, in each of the connecting plates 21 and 22, one end side portions 21c and 22c on the ring-shaped body 12 side and the attachment body 11 side are provided. At least one of the other end portions 21d and 22d has a plate width which is a size along the tire width direction H, and is positioned between the one end portions 21c and 22c and the other end portions 21d and 22d. The intermediate portions 21e, 22e are larger than the plate width, and the lengths L2, L3 are formed so as to be not less than 0.14 times and not more than 0.30 times the length L1 of the connecting plates 21, 22. .
In the illustrated example, both the one end side portions 21c and 22c and the other end side portions 21d and 22d have a plate width larger than the plate width of the intermediate portions 21e and 22e, and the lengths L2 and L3 are the connection plates. The length L1 of 21 and 22 is formed to be 0.14 times or more and 0.30 times or less.

The plate widths of the one end side portions 21c and 22c and the other end side portions 21d and 22d are larger than the plate widths of the intermediate portions 21e and 22e over the entire length.
The length L1 of each of the connecting plates 21 and 22 is, for example, about 235.5 mm, the length L2 of the one end side portions 21c and 22c is, for example, about 58 mm, and the length of the other end side portions 21d and 22d. The length L3 is about 55 mm, for example.
Further, in the one end side portions 21c and 22c, the ratio of the length of the one end connection portions 21f and 22f connected to the one end portions 21a and 22a from the intermediate portions 21e and 22e side to the length of the one end portions 21a and 22a is, for example, about 3: 1. In the other end portions 21d and 22d, the ratio of the length of the other end connection portions 21g and 22g connected to the other end portions 21b and 22b from the intermediate portions 21e and 22e side to the length of the other end portions 21b and 22b is For example, it is about 3: 1.

Further, the plate widths of the intermediate portions 21e and 22e are 0.33 times or more and 0.80 times or less of the plate width of the largest plate width in the one end side portions 21c and 22c and the other end side portions 21d and 22d, preferably It is 0.33 times or more and 0.67 times or less.
In the illustrated example, the plate widths of the intermediate portions 21e and 22e are constant over the entire length. Further, the plate widths of the one end portions 21a and 22a and the other end portions 21b and 22b are constant over the entire length. The plate widths of the one end connecting portions 21f and 22f gradually increase from the intermediate portions 21e and 22e toward the one end 21a and 22a. Further, the plate widths of the other end connection portions 21g and 22g are gradually increased from the intermediate portions 21e and 22e toward the other end portions 21b and 22b. In addition, as shown in FIG. 6B, the inner edge in the tire width direction H of each of the connecting plates 21 and 22 extends linearly over the entire length in a plan view.

  In the one end side portions 21c and 22c of each of the connecting plates 21 and 22 formed in this way, the portion having the largest plate width is the one end portion 21a and 22a, and the other end side portions 21d and the respective connecting plates 21 and 22 are respectively The portion with the largest plate width in 22d is the other end portions 21b and 22b. In the illustrated example, in each of the connecting plates 21 and 22, the plate width L5 of the one end portions 21a and 22a and the plate width L6 of the other end portions 21b and 22b are equal to each other. For example, in each of the connecting plates 21 and 22, the plate width L4 of the intermediate portions 21e and 22e is about 15 mm, the plate width L5 of the one end portions 21a and 22a is about 30 mm, and the plate width of the other end portions 21b and 22b. L6 is about 30 mm.

  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. Moreover, the both ends of the tire width direction H in the back surface of the ring division body 12a which comprises the internal peripheral surface 12b of the ring-shaped body 12 are depressed. Further, a gap in the tire circumferential direction is provided between the ring divided bodies 12a adjacent in the tire circumferential direction. Furthermore, each one end part 21a, 22a of both the connection plates 21 and 22 in one connection member 13 is separately fixed to the both ends of the tire width direction H in the back surface of one ring division 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.

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 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 grooves 34 are formed separately at both ends in the tire width direction H on the outer peripheral surface of the attachment body 11 and open 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 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, in the outer circumferential surface of the attachment body 11, the storage groove 34 located at one end in the tire width direction H and the storage groove 34 located at the other end in the tire width direction H are arranged in the tire circumferential direction. The formation positions along 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.

  As described above, according to the non-pneumatic tire 1 according to the present embodiment, the width of at least one of the one end side portions 21c and 22c and the other end side portions 21d and 22d in each of the connecting plates 21 and 22 is determined. However, since it is larger than the plate width of the intermediate portions 21e, 22e, it is possible to increase the rigidity of at least one of the intermediate portions 21e, 22e, and load the non-pneumatic tire 1 from, for example, the road surface. It is possible to prevent the at least one from being deformed excessively when the is input. Therefore, it is possible to suppress the occurrence of a large load locally on the at least one side, and the strength of both the connecting plates 21 and 22 can be improved.

Further, in each of the connecting plates 21 and 22, the length of at least one of the one end side portions 21c and 22c and the other end side portions 21d and 22d is not less than 0.14 times the length of the connecting plates 21 and 22. Since it is 0.30 times or less, while suppressing the increase in the weight of the non-pneumatic tire 1, it is possible to reliably increase the rigidity of at least one of the above and ensure good riding comfort.
That is, if the length of at least one of the connecting plates 21 and 22 is smaller than 0.14 times the length of the connecting plates 21 and 22, it may be difficult to sufficiently increase the rigidity of the intermediate plates 21e and 22e. . Moreover, when the length of the at least one is greater than 0.30 times the length of the connecting plates 21 and 22, it may be difficult to suppress an increase in the weight of the non-pneumatic tire 1, Since the rigidity of each of the connecting plates 21 and 22 becomes too high, it becomes difficult to provide the non-pneumatic tire 1 with flexibility, and ride comfort may be reduced.

  Further, in the present embodiment, in each of the connecting plates 21 and 22, both the one end side portions 21c and 22c and the other end side portions 21d and 22d have plate widths and intermediate portions 21e and 22e of the connecting plates 21 and 22, respectively. And the lengths L2 and L3 are formed to be not less than 0.14 times and not more than 0.30 times the length L1 of the connecting plates 21 and 22. Can be made to succeed.

  Further, in each of the connecting plates 21 and 22, the one end connection portions 21f and 22f are formed so that the plate width gradually increases from the intermediate portions 21e and 22e toward the one end portions 21a and 22a. Since the end connecting portions 21g and 22g are formed so that the plate width gradually increases from the intermediate portions 21e and 22e toward the other end 21b and 22b, the connecting portions 21f, 22f and 21g are formed. , 22g can be gradually increased from the intermediate portion 21e, 22e side toward the one end portion 21a, 22a side or the other end portion 21b, 22b side, and the strength of both connecting plates 21, 22 is effectively increased. Can be improved.

Further, the plate widths of the intermediate portions 21e and 22e of the connection plates 21 and 22 are the largest in the one end side portions 21c and 22c and the other end side portions 21d and 22d of the connection plates 21 and 22, respectively. Since the width is 0.33 times or more and 0.80 times or less, the above-described effects can be surely achieved and good maneuverability can be provided.
That is, the plate widths of the intermediate portions 21e and 22e of the connecting plates 21 and 22 are the largest in the one end side portions 21c and 22c and the other end side portions 21d and 22d of the connecting plates 21 and 22, respectively. If it is larger than 0.80 times the width, the rigidity of the one end side portions 21c, 22c and the other end side portions 21d, 22d may not be sufficiently increased with respect to the rigidity of the intermediate portions 21e, 22e. On the other hand, the plate widths of the intermediate portions 21e and 22e of the connecting plates 21 and 22 are the largest in the one end side portions 21c and 22c and the other end side portions 21d and 22d of the connecting plates 21 and 22, respectively. If it is smaller than 0.33 times the width, the rigidity of the intermediate portions 21e, 22e becomes too small, and there is a possibility that good maneuverability cannot be provided.

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.

  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 connection plates 21 and 22 and the attachment body 11. It can be easily realized.

  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 are fixed to the mounting body 11 in this way, for example, both connecting plates 21 and 22 by links or the like. Compared with the case where each other end part 21b, 22b of this is connected with the outer peripheral surface of the attachment body 11, the increase in a weight can be suppressed more reliably.

  Further, 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 so that the attachment body 11 and the ring-shaped body 12 are relative to each other. And the other end portions 21b and 22b of both the connecting plates 21 and 22 are brought into contact with the front end surface in the cutting direction among the wall surfaces defining the storage groove 34 when moving in the tire radial direction. Is 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.

  Further, the one end portions 21a and 22a of the connecting plates 21 and 22 are fixed to each other at different positions in the tire width direction H at the same position in the tire circumferential direction on the inner peripheral surface 12b side of the ring-shaped body 12. Then, a plurality of the connecting members 13 are arranged in the tire circumferential direction at the position where the first connecting plate 21 is one tire width direction, and the second connecting plate 22 is located at the other tire width direction position along the tire circumferential direction. Are provided along the tire circumferential direction so that interference between adjacent connecting members 13 in the tire circumferential direction can be suppressed, and the number of arrangements is limited. In addition, the contact pressure acting on the tread member 14 can be easily dispersed in the tire width direction H, and uneven wear can be prevented from occurring in the tread member 14.

  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 variations in the contact pressure within the contact surface, and it is possible to more reliably ensure good riding comfort and more reliably prevent uneven wear on the tread member 14. Can do.

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.

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.

  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, instead of the elastic member 16 shown in the embodiment, for example, a bundle wire, a single wire or a stranded wire formed of steel or the like and extended along the tire circumferential direction, or 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, at the center in the tire width direction H.
The elastic member 16 may be continuously extended over the entire circumference along the tire circumferential direction.

Moreover, in the said embodiment, although the structure provided with the 1st connection plate 21 and the 2nd connection plate 22 respectively as the connection member 13 was shown, it replaces with this and the 1st connection plate is provided in one connection member 13. You may employ | adopt the structure with which 21 and the 2nd connection board 22 were respectively provided with the position of the mutual tire width direction H differing.
A plurality of connecting members 13 may be provided along the tire width direction H between the attachment body 11 and the ring-shaped body 12.

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.
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 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, 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.

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. Furthermore, although the storage groove 34 is opened toward the outside in the tire width direction H, it may be closed. The storage groove 34 is not limited to both ends in the tire width direction H as long as it is the outer peripheral surface of the attachment body 11. 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.
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 the embodiment, in each of the connecting plates 21 and 22, both the one end side portions 21c and 22c and the other end side portions 21d and 22d have a plate width larger than the plate widths of the intermediate portions 21e and 22e. In addition, although the lengths L2 and L3 are formed so as to be 0.14 times or more and 0.30 times or less of the length L1 of the connection plates 21 and 22, the length is not limited thereto. In each of the connecting plates 21 and 22, at least one of the one end side portions 21c and 22c and the other end side portions 21d and 22d has a plate width larger than the plate widths of the intermediate portions 21e and 22e and has a length. The connecting plates 21 and 22 may be formed so as to be 0.14 times to 0.30 times the length of the connecting plates 21 and 22.

  Moreover, in the said embodiment, the board width of the intermediate parts 21e and 22e is 0 of the board width of the largest board width in the one end side parts 21c and 22c and the other end side parts 21d and 22d of the said connection plates 21 and 22. However, the present invention is not limited to this, and may be smaller than 0.33 times or larger than 0.80 times.

Moreover, in the said embodiment, although the board width of intermediate part 21e, 22e is made constant over a full length, in the reference example of this invention, it is not restricted to this. For example, the plate widths of the intermediate portions 21e and 22e may differ depending on the positions in the length direction of the connecting plates 21 and 22, and both side edges in the tire width direction H may be curved in a side view. . In this case, the plate width of the intermediate portions 21e and 22e is the average value (average plate width) of the plate widths in the intermediate portions 21e and 22e.

  Furthermore, in the said embodiment, although the plate width of each of the one end side portions 21c and 22c and the other end side portions 21d and 22d is greater than the plate width of the intermediate portions 21e and 22e over the entire length, If the average value (average plate width) of each of the portions 21c and 22c and the other end portions 21d and 22d is larger than the plate width of the intermediate portions 21e and 22e, the present invention is not limited to this. For example, at least one of the one end side portions 21c and 22c and the other end side portions 21d and 22d in each of the connecting plates 21 and 22 is a fixed end portion (one end portion 21a) fixed to the ring-shaped body 12 or the attachment body 11. , 22a, the other end 21b, 22b) or a connecting portion (one end connecting portion 21f, 22f, the other end connecting portion 21g, 22g) connected to the fixed end portion from the intermediate portion 21e, 22e side is intermediate It may be larger than the plate width of the portions 21e and 22e. In addition, at least one of the one end side portions 21c and 22c and the other end side portions 21d and 22d in each of the connecting plates 21 and 22, the plate width of the connecting portion is larger than the plate width of the intermediate portions 21e and 22e. May be. In addition, it is preferable that the board width of both the connection plates 21 and 22 is at least equivalent to the board width of the intermediate parts 21e and 22e over the full length.

  In the above-described embodiment, the one end connection portions 21f and 22f are formed so that the plate width gradually increases from the intermediate portions 21e and 22e toward the one end 21a and 22a. However, it is not limited to this. Furthermore, in the said embodiment, the other end connection parts 21g and 22g are formed so that plate | board width may become large gradually as it goes to the other end part 21b and 22b side from the intermediate part 21e and 22e side. However, it is not limited to this.

Moreover, in the said embodiment, although each end part 21a, 22a and other end part 21b, 22b shall be formed so that plate | board width may become constant over the full length, it is not restricted to this.
Moreover, in the said embodiment, the part with the largest board width in the one end part 21c, 22c becomes one end part 21a, 22a, and the part with the largest board width in the other end part 21d, 22d, the other end part 21b, However, the present invention is not limited to this. For example, the plate widths of the one end connection portions 21f and 22f may be the largest in the one end side portions 21c and 22c, and the plate widths of the other end connection portions 21g and 22g may be the largest in the other end side portions 21d and 22d. good.

Moreover, in the said embodiment, although the inner edge of the tire width direction H in each of both the connection plates 21 and 22 shall extend linearly over the full length by the planar view, in the reference example of this invention , the present invention is not limited to this.
Moreover, in the said embodiment, although the plate | board thickness of both the connection plates 21 and 22 shall be substantially constant over the full length, it is not restricted to this, For example, the length direction of both the connection plates 21 and 22 It may be different depending on the position.

  In addition, it is possible to appropriately replace the constituent elements in the above-described embodiments with well-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, in the non-pneumatic tire 1 shown in FIGS. 1 to 6, the lengths L2 and L3 of the one end side portions 21c and 22c and the other end side portions 21d and 22d of the connecting plates 21 and 22 are A configuration in which the length L1 of the coupling plates 21 and 22 is 0.25 times is adopted, and as Example 2, the length of the one end side portions 21c and 22c and the other end side portions 21d and 22d in the non-pneumatic tire 1 A configuration in which the lengths L2 and L3 are 0.14 times the length L1 of the connecting plates 21 and 22 is employed. Further, as Comparative Example 1, a configuration is adopted in which the width of each of the connecting plates 21 and 22 is made constant over the entire length in the non-pneumatic tire 1, and as Comparative Example 2, one end in the non-pneumatic tire 1 is used. A configuration was adopted in which the lengths L2, L3 of the side portions 21c, 22c and the other end side portions 21d, 22d were set to 0.12 times the length L1 of the connecting plates 21, 22.
In each of Examples 1 and 2 and Comparative Example 2, the plate width L4 of the intermediate portions 21e and 22e is 0.5 times the plate widths L5 and L6 of the one end portions 21a and 22a and the other end portions 21b and 22b. did. In all of the tires of Examples 1 and 2 and Comparative Examples 1 and 2, the tire width was 145 mm and the tire outer diameter was 562 mm.

Then, using Comparative Example 1 as an evaluation criterion (100), the displacement in the tire radial direction of both coupling plates 21 and 22 with respect to the weight and the load in the tire radial direction for each of the non-pneumatic tires of Examples 1, 2 and Comparative Example 2 The amount (hereinafter referred to as the amount of displacement with respect to the load) and the maximum stress value applied to both connecting plates 21 and 22 were evaluated by an index.
The displacement amount and the maximum stress value with respect to the load are numerical values on the assumption that a load of 2.5 kN is applied to the non-pneumatic tires of Examples 1 and 2 and Comparative Examples 1 and 2 from the outside in the tire radial direction. Calculated by analysis.

The results are shown in Table 1.
In this table, the smaller the numerical value, the better the weight, and the smaller the difference from the comparative example 1, the better the riding comfort, and the smaller the maximum stress value, the smaller the numerical value. It shows that it is so good.

As a result, in the non-pneumatic tire 1 of Examples 1 and 2, it was confirmed that the maximum stress value can be reduced while suppressing an increase in weight compared to the non-pneumatic tire of Comparative Example 2, It was confirmed that the generation of a large load on 22 can be suppressed.
Moreover, in the non-pneumatic tires 1 of Examples 1 and 2, it was confirmed that the difference from the displacement amount with respect to the load of Comparative Example 1 can be kept small, and good riding comfort can be secured.

DESCRIPTION OF SYMBOLS 1 Non-pneumatic tire 11 Attachment body 12 Ring-shaped body 13 Connection member 21 1st connection plate 22 2nd connection plate 21a, 22a One end part (fixed end part)
21b, 22b The other end (fixed end)
21c, 22c One end side portion 21d, 22d The other end side portion 21e, 22e Intermediate portion 21f, 22f One end connection portion (connection portion)
21g, 22g The other end connection part (connection part)
H Tire width direction

Claims (3)

An attachment attached to the axle;
A ring-shaped body surrounding the mounting body from the outside in the tire radial direction;
A non-pneumatic tire provided with 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 has a first connecting plate that is curved so as to be convex toward one side in the tire circumferential direction and a convex toward the other side when the tire is viewed from the outside in the tire width direction. A second connecting plate curved like
In each of these connecting plates, at least one of the one end side portion on the ring-shaped body side and the other end side portion on the attachment body side has a plate width that is a size along the tire width direction. The plate width is larger than the plate width of the intermediate portion located between the portion and the other end side portion, and the plate width is constant over the entire length , and the length is 0.14 times the length of the connecting plate or more. It is formed to be 30 times or less,
The inner edge in the tire width direction of each of the two connecting plates extends linearly over the entire length in plan view, and at least one of the one end side portion and the other end side portion of each of the two connecting plates. The non-pneumatic tire is characterized in that the plate width is limited and larger toward the outside in the tire width direction than the plate width of the intermediate portion. The non-pneumatic tire according to claim 1,
In at least one of the one end side portion and the other end side portion of each of the connecting plates, the connecting portion connected from the intermediate portion side to the fixed end portion fixed to the ring-shaped body or the attachment body is the intermediate portion side. A non-pneumatic tire characterized by being formed so that the plate width gradually increases from the end toward the fixed end. The non-pneumatic tire according to claim 1 or 2,
The plate width of the intermediate portion of each of the connecting plates is 0.33 to 0.80 times the plate width of the largest portion of the connecting plate at one end side portion and the other end side portion. A non-pneumatic tire characterized by that.

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