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Pneumatic tire

A technology of pneumatic tires and beads, applied to tire parts, tire sidewalls, transportation and packaging, etc., can solve the problems that hinder the long life of tires, and achieve the concentrated effect of excellent durability and suppression of deformation

Pending Publication Date: 2022-04-22
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This damage hinders the long life of the tire

Method used

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  • Pneumatic tire
  • Pneumatic tire
  • Pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0117] made Figure 1 ~ Figure 3 Forklift tires shown. The size of this tire is "7.00-1212PR". The carcass of this tire has a first cord, a second cord, a third cord, and a fourth cord. The first cord has a first folded end, the second cord has a second folded end, the third cord has a third folded end, and the fourth cord has a fourth folded end. The first folded end, the second folded end, and the third folded end are located radially outward from the outer end of the filler. The fourth turned-back end is located on the outside of the bead in the axial direction. The side profile has a point of inflection. The position of the bending point substantially coincides with the position of the outer end of the packing in the radial direction.

Embodiment 2-9 and comparative example 1-2

[0119] Tires of Examples 2 to 9 and Comparative Examples 1 and 2 were obtained in the same manner as in Example 1 except that the number and positions of inflection points were as shown in Tables 1 to 3 below.

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PUM

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Abstract

Provided is a pneumatic tire (2) having excellent durability. A tire (2) is provided with a tread (4), side walls (6), beads (8), and a carcass (10). The bead (8) has a core (18) and a filler (20). The carcass (10) has four plies (22, 24, 26, 28). The carcass (10) has a diagonal configuration. The side profile of the tire (2) includes a bending point (PB) protruding outward in the axial direction. The radial position of the bending point (PB) substantially coincides with the radial position of the outer end (EF) of the filler (20). The side profile may also have two or more bending points.

Description

technical field [0001] The present invention relates to pneumatic tires. In particular, the invention relates to the improvement of the side profile of tires. Background technique [0002] Pneumatic tires used for industrial vehicles such as forklifts require durability and low cost. Industrial vehicles travel at low speeds, so high performance at high speeds is not required of the tire. Under such circumstances, so-called bias tires are used as tires for industrial vehicles. Bias tires suitable for industrial vehicles are disclosed in JP-A-2018-99926. The bias tire has a reinforcing layer. This reinforcing layer can contribute to the durability of the tire. [0003] Patent Document 1: Japanese Patent Application Laid-Open No. 2018-99926 [0004] Industrial vehicles are used for transporting heavy objects, etc. Therefore, a large load is applied to tires for industrial vehicles. And the addition and removal of the load are repeated. In this tire, large compression s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C13/02
CPCB60C13/02
Inventor 三轮琢也
Owner SUMITOMO RUBBER IND LTD