JP2015101117A - Tire protection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tire protection device which is light, prevents bulkiness, and can be mounted to a tire easily.SOLUTION: A tire protection device comprises: an elastic sheet 3 disposed on an inner peripheral side of a tire 8 in a circumferential direction; and a pair of pressing rings 4 for pressing both edge parts of the elastic sheet 3 in a shaft direction onto a bead part 9 of the tire 8 respectively. The pressing ring 4 comprises an engaging annular part 13 engaging with the bead part 9 of the tire 8 from the outside in the shaft direction and a pressing cylindrical part 14 in a cylindrical shape extending inward in the shaft direction of the tire 8 from an inner end part of the engaging annular part 13 in an L-shaped cross-section. Both edge parts of the elastic sheet 3 in the shaft direction are bent along the bead part 9 by elastic deformation, and the elastic sheet 3 forms a cylindrical body A which blocks a tire opening 10 over the entire circumference, and is a bead covering part 19 in which both edge parts of the elastic sheet 3 in the tire 8 shaft direction are disposed on an outer circumferential surface of the pressing cylindrical part 14.

Description

  The present invention relates to a tire protection device that prevents rainwater and the like from entering a tire.

The tire protection device blocks the tire opening between the bead parts corresponding to the axial direction of the tire over the entire circumference to prevent rainwater from entering the inside of the tire and intrusion of dust and dust. There is something like that.
A conventional tire protection device of this type includes a pair of shielding members having a conical portion and a cylindrical portion projecting on the small diameter side of the conical portion, and the cylindrical portion side of the shielding member is connected to the inside of the tire from both sides in the axial direction of the tire. The cylindrical portions are connected and fixed together by screwing or the like, and the outer surface of the conical portion of each shielding member is pressed against the bead portion (tire opening edge portion) of the tire over the entire circumference, so that the tire There is one that closes the opening (for example, Patent Document 1).

  Another conventional tire protection device includes a flexible annular body that extends in an annular shape along the circumferential direction of the tire, and the annular body is inserted outwardly into the tire cavity. Then, there is one in which the outer surface of the annular body is pressed against the beat portion (tire opening edge) of the tire over the entire circumference so as to close the tire opening (for example, Patent Document 2).

JP 2007-320387 A JP 2009-274621 A

  However, in the conventional case, the tire protection device is a large tire having a large shielding member and an annular body, especially a weight of 6 to 7 tons, compared to the size of the tire opening between the bead portions corresponding to the axial direction of the tire. In the tire protection device to be mounted, the shielding member and the annular body of the tire protection device are very large and heavy, and the tire protection device becomes bulky when being mounted on the tire or when being removed from the tire. In addition, when attaching the tire protection device to the tire, it is difficult to insert the annular body into the cavity of the tire, or to fit the pair of shielding members into the tire and connect them in the tire. It was very troublesome to attach the protective device to the tire.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a tire protection device that can be prevented from being light and bulky and can be easily mounted on a tire.

Specific means for solving the problems in the present invention are as follows.
The technical means of the present invention that solves this technical problem is an elastic sheet that is arranged circumferentially on the inner peripheral side of the tire 8 so as to close the tire opening 10 between the bead portions 9 corresponding to the axial direction of the tire 8. 3 and a pair of pressing rings 4 that press both ends of the elastic sheet 3 in the axial direction against the bead portions 9 of the tire 8, respectively.
The holding ring 4 includes an engagement annular portion 13 that engages with the bead portion 9 of the tire 8 from the outside in the axial direction, and a cylindrical shape that extends inward in the axial direction of the tire 8 from the inner end portion of the engagement annular portion 13. The holding cylinder portion 14 is provided in an L-shaped cross section,
The elastic sheet 3 is curved by elastic deformation so that both axial ends thereof are along the bead portion 9 to form a cylindrical body A that covers the tire opening 10 over the entire circumference. The two end portions are bead covering portions 19 arranged on the outer peripheral surface of the pressing cylinder portion 14.

Further, according to another technical means of the present invention, a plurality of the elastic sheets 3 are provided in the circumferential direction of the tire 8, and the plurality of elastic sheets 3 are arranged such that both axial end portions thereof are along the bead portions 9. While being curved by elastic deformation, the end portions in the circumferential direction of the adjacent elastic sheets 3 are superposed and fixed to each other to form a cylindrical body A that covers the tire opening 10 over the entire circumference.
According to another technical means of the present invention, one elastic sheet 3 is provided in the circumferential direction of the tire 8, and the elastic sheet 3 has both axial end portions thereof along the bead portions 9. In addition to being curved by elastic deformation, the end portions in the circumferential direction of the elastic sheet 3 are superposed and fixed to each other to form a cylindrical body A that covers the tire opening 10 over the entire circumference.

Another technical means of the present invention is that the shaft of the elastic sheet 3 is controlled so as to restrict the movement of the elastic sheet 3 in the axial direction by contacting the bead portion 9 of the tire 8 from the inside in the axial direction. The restriction bodies 21 projecting outward on both sides in the direction are provided in the circumferential direction.
Another technical means of the present invention is that the regulating body 21 is formed integrally with the elastic sheet 3 and is regulated so that the circumferential ends of the curved elastic sheet 3 are superposed and fixed to each other. One end and the other end of the body 21 are fitted to each other.

Another technical means of the present invention is that a sealing means 29 for contacting the bead portion 9 of the tire 8 is provided on the outer surface of the bead covering portion 19.
Another technical means of the present invention is that a plurality of connecting bands 5 for connecting the pair of holding rings 4 so as to approach each other in the axial direction at a plurality of locations in the circumferential direction are provided. .

  According to the present invention, the tire protection device includes: an elastic sheet disposed circumferentially on the inner circumferential side of the tire so as to close a tire opening between bead portions corresponding to the axial direction of the tire; and both axial ends of the elastic sheet The tire opening can be closed over the entire circumference with a pair of holding rings that hold the parts against the bead part of the tire, so the components of the tire protection device need to be the minimum necessary for the tire opening. And since the elastic sheet which closes a tire opening is a thin sheet | seat material, even if a tire is large sized, the whole tire protection apparatus can be made lightweight. In addition, as described above, since the constituent members of the tire protection device need only be the minimum necessary to correspond to the tire opening, the elastic sheet and the holding ring do not protrude greatly outward from the tire when attached to the tire, When storing the tire protection device, it is possible to store the tire protection device in a compact manner by overlapping the elastic sheets, so that the tire protection device is not bulky.

  In addition, when mounting a tire protection device on a tire, the elastic sheet is curved by elastic deformation so that both end portions in the axial direction are along the bead portion, forming a cylindrical body that covers the tire opening over the entire circumference. In addition, a pair of pressing rings may be fitted into the bead portions at both ends in the axial direction of the tire, and both ends of the elastic sheet may be pressed against the bead portions with the pair of pressing rings, and the elastic sheet may be lightweight. Together, the tire protection device can be attached to the tire very easily.

It is side surface sectional drawing of the principal part of the tire protection apparatus which shows 1st Embodiment of this invention. It is side surface sectional drawing of the tire protection apparatus with which the tire was mounted | worn. It is a side view of the elastic sheet with which the tire was equipped. It is the sectional view on the AA line of the same FIG. It is an expanded view of the elastic sheet. It is a side view of the tire protection device with which the tire was equipped. It is a perspective view of the hook member and a locking groove. It is a side view of the elastic sheet with which the tire which shows a 2nd embodiment was equipped. It is an expanded view of the elastic sheet. It is side surface sectional drawing of the principal part of the tire protection apparatus which shows 3rd Embodiment. It is side surface sectional drawing of the tire protection apparatus with which the tire was mounted | worn. It is the BB sectional view taken on the line of FIG. It is a side view of the elastic sheet with which the tire was equipped. It is an expanded view of the elastic sheet.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 7 show a first embodiment of the present invention. 1 to 7, the tire protection device 1 includes a pair of elastic sheets 3 (an upper elastic sheet 3 a and a lower elastic sheet 3 b), a pair of pressing rings 4, and a plurality of connecting bands 5. Is curved in an arc shape along the inner peripheral surface of the tire 8 to block the tire opening 10 over the entire circumference, and the pair of pressing rings 4 are the bead portions of the tire 8 at both axial ends of the pair of elastic sheets 3. 9 to each. The plurality of connection bands 5 connect the pair of pressing rings 4 so as to approach each other inward in the axial direction.

Here, the tire 8 to which the tire protection device 1 according to the present embodiment is attached has, for example, a weight of about 6 to 7 tons, an outer diameter of about 3 m to 5 m, an inner diameter of about 1 m to 2 m, and a width of about 8. It is a large tire that is about 1 m to 2 m.
The pair of retaining rings 4 includes an engagement annular portion 13 that engages with the bead portion 9 of the tire 8 from the outside in the axial direction, and a cylinder that extends inward in the axial direction of the tire 8 from the inner end portion of the engagement annular portion 13. The holding cylinder part 14 is provided with a cross-sectional L shape.

The holding ring 4 is formed by extruding a hard synthetic resin such as polyethylene resin so as to integrally form the engaging annular portion 13 and the holding cylinder portion 14, and both ends of the extruded molding resin are heat-sealed 15. Connected and formed into a cylindrical shape.
The diameter of the pressing cylinder portion 14 of the pressing ring 4 is set to be slightly larger than the diameter of the inner end face of the bead portion 9 of the tire 8 (inner diameter of the tire 8). The pressing cylinder portion 14 includes the tire 8 and the pressing ring. 4 is forcibly fitted into the bead portion 9 of the tire 8 using the elasticity of 4.

  The pair of elastic sheets 3 is formed of a transparent and elastic rectangular thin plate made of synthetic resin such as acrylic, polyethylene, polypropylene (PP), pet (PET), polycarbonate, and vinyl chloride, and has both ends in the width direction. Portions (both ends in the axial direction of the tire 8) are curved in an arc shape by elastic deformation so as to be along the bead portions 9, and the end portions in the circumferential direction of the other adjacent elastic sheet 3 are superposed and fixed to each other. A cylindrical body A that covers the tire opening 10 over the entire circumference is formed, and both end portions in the tire axial direction of the elastic sheet 3 are bead covering portions 19 disposed on the outer peripheral surface of the pressing cylinder portion 14.

  The pair of elastic sheets 3 includes an upper elastic sheet 3a and a lower elastic sheet 3b, and the upper elastic sheet 3a is arranged along the bead portion 9 on the upper portion of the tire 8 that is curved and raised in an arc shape. Thus, the tire opening 10 between the bead portions 9 at the top of the tire 8 is closed. The lower elastic sheet 3 b is disposed along the bead portion 9 at the lower portion of the tire 8 which is curved and raised in an arc shape, and closes the tire opening 10 between the bead portions 9 below the tire 8.

  A pair of restricting bodies 21 having elasticity are fixed in the circumferential direction on the outer surfaces on both axial sides of the upper elastic sheet 3a and the lower elastic sheet 3b. The regulating body 21 has an inner flange 22 having a U-shaped cross section and an outer collar 23 having a U-shaped cross section that is fitted and fixed to the inner collar 22, and the inner collar 22 is formed on the outer surface of the elastic sheet 3 by an adhesive or the like. The restricting body 21 retains the elastic sheet 3 so that the elastic sheet 3 does not bend or bend locally, and contacts the bead portion 9 of the tire 8 from the inside in the axial direction. Thus, the movement of the elastic sheet 3 in the axial direction is restricted so that the bead covering portion 19 is not detached from the bead portion 9.

A projecting piece 25 projecting outward in the circumferential direction is provided at the center of both end portions in the circumferential direction of the lower elastic sheet 3b, and the width of the projecting piece 25 in the tire axial direction is the separation width of the pair of regulating bodies 21 of the upper elastic sheet 3a It corresponds. Double-sided adhesive tape 27 or an adhesive is provided at both ends in the circumferential direction of the lower elastic sheet 3 b and on the inner surface in the circumferential direction from the protruding piece 25 and the inner surface of the distal end portion of the protruding piece 25.
Thus, both ends in the circumferential direction of the lower elastic sheet 3b are polymerized from the outside (tire radial direction) with respect to both ends in the circumferential direction of the upper elastic sheet 3a, and the protruding pieces 25 are paired with the pair of upper elastic sheets 3a. It fits between the regulation bodies 21, and the edge part and the protrusion piece 25 of the circumferential direction of the lower elastic sheet 3b are superposed and bonded via the double-sided adhesive tape 27 or an adhesive. Thereby, the upper elastic sheet 3a and the lower elastic sheet 3b block the tire opening 10 of the tire 8 over the entire circumference.

Seal means 29 that contacts the bead portion 9 of the tire 8 is attached to the outer surface of the bead covering portion 19 of the upper elastic sheet 3a and the lower elastic sheet 3b. The sealing means 29 is formed in a thin plate shape with a rubber material or a flexible synthetic resin. The bead covering portions 19 of the upper elastic sheet 3 a and the lower elastic sheet 3 b are pressed against the bead portion 9 of the tire 8 through the sealing means 29 by the pressing cylinder portion 14 of the pressing ring 4.

The connecting band 5 includes a band member 31 disposed in the tire axial direction along the inner surface of the pressing cylinder portion 14 and the elastic sheet 3 of the pressing ring 4, and a pair of hook members 32 connected to both ends of the band member 31. have.
The band member 31 has a non-stretchable band main body 34 constituted by a fiber band or the like on one end side thereof, and an elastic band portion 35 that is extensible in the longitudinal direction constituted by a rubber band or the like on the other end side. The band body 34 and the elastic band portion 35 are connected by sewing or the like.

Each hook member 32 is formed by bending a metal wire, and a pair of width-wise hook portions 37 bent in a bowl shape, a connecting collar portion 38 for connecting tip portions of the pair of hook portions 37, and a pair of hook portions 37. And a coupling portion 39 that couples the base side of each.
A pair of locking grooves 41 (a total of 12 locking grooves 41 in the illustrated example) at a plurality of locations (six in the illustrated example) spaced equally in the circumferential direction of the engagement annular portion 13 of the pair of pressing rings 4. Is formed.

  As shown in FIG. 7, each locking groove 41 is formed in the engagement annular portion 13 so as to be immersed inward in the radial direction from the outer peripheral end thereof, and each locking groove 41 is provided in the inner portion in the radial direction. And a pair of retaining projections 43 provided radially outward of the retaining recess 42, and the pair of retaining projections 43 extends from the retaining recess 42 to the hook member 32. It protrudes in the direction facing each other so as to close the passage for the detachment.

  Thus, a pair of locking grooves 41 are arranged with respect to one hook member 32 of the connecting band 5, and a pair of hook portions 37 in the width direction of the hook member 32 are respectively engaged with the pair of locking grooves 41. It is designed to be releasably engaged. Each of the connecting bands 5 has the pair of hook members 32 engaged with the pair of locking grooves 41 in a state where the elastic band portion 35 is extended in the longitudinal direction. It connects so that it may approach.

  According to the first embodiment, when the tire protection device 1 is mounted on the tire 8, for example, along the bead portion 9 at the lower part of the tire 8 that is raised by curving the lower elastic sheet 3 b into an arc shape by elastic deformation. The upper elastic sheet 3a is arranged along the bead portion 9 on the upper part of the tire 8 that is bent and curved in an arc shape by elastic deformation, and both end portions in the circumferential direction of the upper elastic sheet 3a are Double-sided adhesive tape is formed by polymerizing both ends in the circumferential direction of the lower elastic sheet 3b from the inside, and fitting the protruding pieces 25 at both ends in the circumferential direction of the lower elastic sheet 3b between the pair of regulating bodies 21 of the upper elastic sheet 3a. 27 or both ends of the lower elastic sheet 3b in the circumferential direction are polymerized and fixed to both ends in the circumferential direction of the upper elastic sheet 3a via an adhesive 27 or adhesive.

  Next, a pair of pressing rings are inserted into the bead portions 9 at both ends in the axial direction of the tire 8 by inserting the pair of pressing rings 4 so as to be fitted into both ends in the axial direction of the upper elastic sheet 3a and the lower elastic sheet 3b. The presser cylinder part 14 of 4 is fitted inside via the bead coating | coated part 19 of the elastic sheet 3, and the engagement annular part 13 of a pair of presser ring 4 is contact | abutted to the bead part 9 of the tire 8 from the axial direction outer side. Engage. As a result, the bead covering portions 19 of the upper elastic sheet 3 a and the lower elastic sheet 3 b are attached to the outer peripheral surface of the pressing cylinder portion 14.

Finally, the pair of hook members 32 are respectively engaged with the pair of locking grooves 41 while the elastic band portions 35 of the plurality of connection bands 5 are extended in the longitudinal direction, and the pair of holding rings 5 What is necessary is just to connect 4 so that it may mutually approach inward in an axial direction in several places of the circumferential direction.
Therefore, after the tire protection device 1 is mounted on the tire 8, the upper elastic sheet 3a and the lower elastic sheet 3b cover the tire opening 10 between the bead portions 9 corresponding to the axial direction of the tire 8 over the entire circumference, It is possible to reliably prevent rainwater from entering the inside of the tire 8 and intrusion of dust and dirt.

Further, rainwater adhering to the inner surface of the upper elastic sheet 3a flows down from the upper elastic sheet 3a to the lower elastic sheet 3b, but both ends in the circumferential direction of the upper elastic sheet 3a are on the inner sides of both ends of the lower elastic sheet 3b. Therefore, the rainwater can be prevented from entering the inside of the tire 8 from between the end portion of the upper elastic sheet 3a and the end portion of the lower elastic sheet 3b.
Further, an upper elastic sheet 3 a and a lower elastic sheet 3 b corresponding to the tire opening 10 between the bead portions 9 corresponding to the axial direction of the tire 8, and a pair of pressing rings 4 corresponding to both axial ends of the elastic sheet 3. In addition, since the tire opening 10 can be reliably closed over the entire circumference, the constituent members of the tire protection device 1 can be the minimum necessary for the tire opening 10, and the upper elastic sheet 3a that closes the tire opening 10 can be used. Since the lower elastic sheet 3b is a thin sheet material, the entire tire protection device 1 can be made light even if the tire 8 is large. Further, as described above, since the constituent members of the tire protection device 1 need only be the minimum necessary for the tire opening 10, when the tire is mounted on the tire 8, the upper elastic sheet 3a, the lower elastic sheet 3b and the pressing ring from the tire 8 are used. 4 does not protrude greatly outward, and when the tire protection device 1 is stored, the upper elastic sheet 3a and the lower elastic sheet 3b can be stacked and stored, and the tire protection device 1 is not bulky. It will end.

  Further, when the tire protection device 1 is mounted on the tire 8, the upper elastic sheet 3 a and the lower elastic sheet 3 b are curved so as to be along the inner peripheral surface of the tire 8, and the bead portions 9 at both axial ends of the tire 8. A pair of presser rings 4 are respectively fitted inside, and both ends of the upper elastic sheet 3a and the lower elastic sheet 3b may be pressed against the bead part 9 with the pair of presser rings 4, and the upper elastic sheet 3a and the lower elastic sheet 3b In combination with the light weight, the tire protection device 1 can be attached to the tire 8 very easily.

  In addition, since the plurality of connection bands 5 that connect the pair of pressing rings 4 so as to approach each other in the axial direction at a plurality of locations in the circumferential direction are provided, 4 are made to approach each other inward in the axial direction, and the engaging annular portion 13 of each pressing ring 4 is pressed against the bead portion 9 of the tire 8 from the outside, and the pressing cylinder portion 14 is deeply inserted into the bead portion 9 of the tire 8. The presser ring 4 can be fitted and held firmly so that the pressing ring 4 is not accidentally pulled out from the tire 8 and does not rattle.

Further, since the upper elastic sheet 3a and the lower elastic sheet 3b are transparent, whether rain water, dust, or dust has entered the tire 8 through the upper elastic sheet 3a and the lower elastic sheet 3b without removing the tire protection device 1. This is convenient because it can be confirmed visually.
The pair of pressing rings 4 are formed by extruding a synthetic resin such as polyethylene resin so that the engagement annular portion 13 and the pressing cylinder portion 14 are integrally formed, and both ends that are formed by extrusion are connected by thermal welding 15. Since the tire 8 to which the tire protection device 1 is mounted is large in size, even if the diameter of the pressing ring 4 is increased to about 3 m to 5 m, a small and simple extrusion metal is used. The press ring 4 can be manufactured inexpensively and easily by the mold.

  Further, since the sealing means 29 that contacts the bead portion 9 of the tire 8 is attached to the outer surface of the bead covering portion 19, the bead covering portion 19 of the elastic sheet 3 attaches the sealing means 29 to the bead portion 9 of the tire 8. It is possible to close the tire opening 10 with the elastic sheet 3 more securely, so that rainwater enters the inside of the tire 8 or dust or dust enters. It can be effectively prevented.

  7 and 8 show a second embodiment, in which the protruding piece 25 of the lower elastic sheet 3b is omitted, and the upper elastic sheet 3a and the lower elastic sheet 3b are formed in a rectangular plate shape having substantially the same shape. Further, as in the case of the first embodiment, a pair of elastic regulating bodies 21 are fixed to the outer surfaces on both axial sides of the upper elastic sheet 3a and the lower elastic sheet 3b in the circumferential direction, and the upper elastic sheet 3a and the lower elastic sheet 3a A plurality of (three in the illustrated example) connecting rods 45 are fixed to the outer surface of the elastic sheet 3b so as to connect the pair of regulating bodies 21. Accordingly, the elastic sheet 3 can be held by the pair of restrictors 21 and the elastic sheet 3 can be held by the plurality of connecting rods 45 so that the elastic sheet 3 is not locally bent or bent. The other points are the same as those in the first embodiment.

10 to 14 show a third embodiment, and only one elastic sheet 3 is provided in the circumferential direction of the tire 8. The elastic sheet 3 is curved by elastic deformation so that both end portions in the axial direction thereof are along the bead portions 9, and the end portions a in the circumferential direction of the elastic sheet 3 are superposed and fixed to each other, so that the tire opening 10 is formed. A cylindrical body A that covers the entire circumference is formed. The sealing means 29 provided in the bead covering part 19 of the elastic sheet 3 in the first embodiment is omitted.

The restricting body 21 is formed integrally with the elastic sheet 3 and extends over the entire length of the elastic sheet 3 in the circumferential direction. The restricting body 21 protrudes outward in the thickness direction from the elastic sheet 3 in a U shape, and the base end (inner end) of the restricting body 21 is open.
That is, as shown in FIG. 10, the regulation body 21 includes a pair of side wall portions 21 a facing in the tire 8 axial direction (width direction of the elastic sheet 3) and a connecting wall 21 b that connects between the protruding end portions of the side wall portions 21 a. And an opening 47 is provided on the inner end side of the regulating body 21. Therefore, similarly to the case of the first embodiment, the restricting body 21 retains the elastic sheet 3 so that the elastic sheet 3 does not bend or bend locally, and the shaft 21 is attached to the bead portion 9 of the tire 8. The movement of the elastic sheet 3 in the axial direction is restricted so that the bead covering portion 19 does not come off the bead portion 9 by contacting from the inside of the direction.

And as shown in FIG. 12, the one end part and other end part of the regulation body 21 are superposed | bonded so that the edge parts a of the circumferential direction of the elastic sheet 3 curved so that the bead part 9 of the tire 8 may be followed may overlap. Are fitted and fixed to each other. The other points are the same as those in the first embodiment.
According to the third embodiment, when the tire protection device 1 is mounted on the tire 8, for example, the elastic sheet 3 is arranged along the bead portion 9 of the tire 8 that is bent and curved in an arc shape by elastic deformation. Then, one end portion and the other end portion of the regulating body 21 may be fitted and fixed to each other, and both end portions a in the circumferential direction of the elastic sheet 3 may be superposed and fixed, and the elastic sheet 3 can be easily attached to the tire 8. Can do.

Thereafter, as in the case of the first embodiment, a pair of pressing rings 4 are fitted into the bead portions 9 at both ends in the axial direction of the tire 8, and both ends of the elastic sheet 3 are paired with the pair of pressing rings 4. The tire protection device 1 can be attached to the tire 8 very easily in combination with the fact that the elastic sheet 3 is lightweight.
Further, in the case of the third embodiment, the elastic sheet 3 can be easily and inexpensively manufactured by integrally molding the elastic sheet 3 together with a pair of regulating bodies 21 with a synthetic resin having elasticity.

In the case of the third embodiment, both ends a in the circumferential direction of the elastic sheet 3 may be polymerized and bonded using an adhesive or a double-sided adhesive tape.
Further, in the case of the third embodiment, the shape of the restricting body 21 is not limited to the U-shaped cross section, and may be a U-shaped cross section or other shapes. You may make it a mutually different shape so that a part side may be unevenly fitted.

  In the embodiment described above, the elastic sheet 3 that closes the tire opening 10 is provided with a pair of the upper elastic sheet 3a and the lower elastic sheet 3b or only one, but instead of this, the elastic sheet 3 Three or more may be provided in the circumferential direction of the tire 8. Even when a plurality of elastic sheets 3 for closing the tire openings 10 are provided, the regulating body 21 may be formed integrally with the elastic sheet 3 as in the case of the third embodiment.

Moreover, in the said embodiment, although the elastic sheet 3 which plugs the tire opening 10 is transparent, it may replace with this and the elastic sheet 3 may be formed in the translucent which has permeability | transmittance, and may be opaque Good.
Moreover, in the said embodiment, although the tire 8 with which the tire protection apparatus 1 is mounted | worn is a big tire 8 with a weight of about 6 to 7 tons, it replaces with this and the tire 8 with which the tire protection apparatus 1 is mounted | worn is normal. The tire outer diameter used for a passenger car etc. may be a comparatively small tire of about 500 mm to 1000 mm, and the size of the elastic sheet 3 and the holding ring 4 of the tire protection device 1 corresponds to the size of the tire 8. It is changed appropriately.

  Further, the plurality of connection bands 5 that connect the pair of holding rings 4 so as to approach each other in the axial direction at a plurality of locations in the circumferential direction are not limited to those having the structure shown in the above embodiment. The member may be wound between a pair of pressing rings 4 and tightened.

DESCRIPTION OF SYMBOLS 1 Tire protective device 3 Elastic sheet 4 Holding ring 5 Connection band 8 Tire 9 Bead part 10 Tire opening 13 Engagement annular part 14 Pressing cylinder part 21 Control body 29 Sealing means A Cylindrical body

Claims (7)

An elastic sheet (3) arranged in the circumferential direction on the inner peripheral side of the tire (8) so as to close the tire opening (10) between the bead portions (9) corresponding to the axial direction of the tire (8), and an elastic sheet A pair of pressing rings (4) for pressing both axial ends of (3) to the bead portions (9) of the tire (8),
The retaining ring (4) includes an engagement annular portion (13) that engages with the bead portion (9) of the tire (8) from the outside in the axial direction, and an inner end portion of the engagement annular portion (13) from the tire (8 And a cylindrical presser tube portion (14) extending inward in the axial direction in an L-shaped section,
The elastic sheet (3) is curved by elastic deformation so that both axial end portions thereof are along the bead portion (9) to form a cylindrical body (A) that closes the tire opening (10) over the entire circumference, A tire protection device characterized in that both end portions of the elastic sheet (3) in the axial direction of the tire (8) are bead covering portions (19) disposed on the outer peripheral surface of the pressing cylinder portion (14).   A plurality of the elastic sheets (3) are provided in the circumferential direction of the tire (8), and the plurality of elastic sheets (3) are curved by elastic deformation so that both axial ends thereof are along the bead portions (9), respectively. In addition, the end portions in the circumferential direction of the adjacent elastic sheets (3) are superposed on each other to form a cylindrical body (A) that closes the tire opening (10) over the entire circumference. The tire protection device according to claim 1.   One elastic sheet (3) is provided in the circumferential direction of the tire (8), and this elastic sheet (3) is curved by elastic deformation so that both axial ends thereof are along the bead portions (9). In addition, the end portions in the circumferential direction of the elastic sheet (3) are superposed and fixed to each other to form a cylindrical body (A) that closes the tire opening (10) over the entire circumference. The tire protection device according to claim 1.   The elastic sheet (3) is placed on both sides in the axial direction so as to be in contact with the bead portion (9) of the tire (8) from the inside in the axial direction and to restrict the movement of the elastic sheet (3) in the axial direction. The tire protection device according to any one of claims 1 to 3, wherein a regulating body (21) projecting in the direction is provided in a circumferential direction.   The restricting body (21) is formed integrally with the elastic sheet (3), and one end of the restricting body (21) is attached so that the circumferential ends of the curved elastic sheet (3) are superposed and fixed. The tire protection device according to claim 4, wherein the portion and the other end are fitted to each other.   The tire according to any one of claims 1 to 5, wherein sealing means (29) is provided on the outer surface of the bead covering part (19) so as to contact the bead part (9) of the tire (8). Protective device.   The plurality of connecting bands (5) for connecting the pair of pressing rings (4) so as to approach each other in the axial direction at a plurality of locations in the circumferential direction are provided. The tire protection device according to any one of the above.

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