Abstract: A device for mounting snow chains on a vehicle tire has a base adapted to be placed on the ground, downwardly and outwardly inclined terminal portions providing runways for a vehicle wheel and a transversely concave intermediate mounting surface for supporting the vehicle tire. The top of the device has laterally-extending grooves allowing each chain cross-over to rest freely therein with ample room to properly fit the chain. A lobe is located in the center for the vehicle tire to rest upon. The outer edges of the device extend upwardly to center the vehicle tire and prevent it from slipping off the sides of the device. The bottom has saw-toothed lateral members to hold the device from slipping on the road surface and to distribute the weight of the vehicle evenly upon the road surface.

Abstract: A self-tensioning device for snow chains (2) for vehicles includes an outer element (3) closable in a ring, suitable to be placed on the outer side of the wheel (1), an inner element closable in a ring, suitable to be placed on the inner side of the wheel (1), inner and outer elements being joined by variously composed elements (10) creating the traction on the tread, the outer element having a terminal portion (7) passing through a non-return device (5) which makes it slide only in the chain tensioning direction and not in the opposite slackening direction, a storage block (20) containing an elastic element (21) able to hook, tension and retain the terminal portion (7) being provided on the outer ring.

Abstract: A device for mounting 3-railer snow chains having three runners on a set of double truck tires which are mounted on an outside wheel and an inside wheel. The device includes a non-elastic strap, a first wheel hook connected to a first end of the non-elastic strap for hooking the device to the inside wheel rim of the inside wheel, and a second wheel hook connected to a second end of the non-elastic strap for hooking the device to the outside wheel rim of the outside wheel. The device also includes a tightening mechanism such as a ratchet device for tightening the strap on the tires, and three chain hooks connected along the length of the strap. Each of the three chain hooks are positioned to engage one of the runners of the 3-railer snow chains. By driving forward or otherwise rotating the tire, the snow chains are tightly wrapped around the tire.

Abstract: A tire slip preventing system for a vehicle includes a right tire anti-slip body, with a right tire fastening device cooperating therewith. A left tire anti-slip body is provided, with a left tire fastening device cooperating therewith. Each fastening device includes a fastening band and a fastening buckle, with the fastening buckle having hooks and engagement part, and a pivotably disposed cleat. The fastening band includes a first folded portion at a first end, with the fastening band engaging and passing over the cleat and looping in a reverse direction so that the fastening band forms an outer circumferential loop and an inner circumferential loop such that the fastening device has a non-reversible self-lock mechanism in which the cleat is pivoted to clamp the fastening band around the cleat by a tension of the inner circumferential loop. The buckle engages the respective anti-slip body with the pair of hooks.

Abstract: A tire chain wrapper for a dual wheel and the method of mounting a tire chain on a dual wheel. The wrapper includes a securing bar for securing an end of the tire chain to the dual wheel, a connecting rope pivotally attached at one end to the midpoint of the securing bar, the rope being adapted to extend between the tires of the dual wheel and a rigid plastic retaining disk attached to another end of the connecting rod and being adapted to engage the wheel rims and thereby retain the securing bar over the tire chain. After installation of the wrapper, the vehicle is driven forward to wrap the chain around the tire. The ends of the chain are hooked together, and the tire chain wrapper is removed from the tire.

Abstract: A tire anti-skid apparatus including a plurality of non-metallic anti-skid members which are coupled at their side edges to an outer tightening member and to an inner tightening member via joints, the inner tightening member being in a form of a string comprised of stranded wires, and at least one of the anti-skid members being movable substantially parallel to the inner tightening member.

Abstract: A removable traction device (10) for a tire (14) on a vehicle comprises an elongated member (12) for fitting around the tire (14) along the ground-engaging tread of the tire. The elongate member (12) has an inner surface for contact with the ground-engaging tread of the tire (14) and an outer surface which is provided with traction assistance means thereon. In one embodiment, the elongate member is elastic or stretchable in its longitudinal direction. According to another specific embodiment, the elongated member is in the form of an endless belt and is provided with a circumferentially extending rib (18) on its inner surface for forming a stretch fit around the tire (14). In another embodiment, the member (12) is provided with a plurality of openings (22) between its inner and its outer surfaces.

Abstract: A traction enhancement device for vehicle wheels for use in the event of an emergency. The traction enhancement device includes a traction member for being placed across the periphery of the tire of a drive wheel. A first strap is connected with one end of the traction member and is provided with a series of closely spaced ramped serrations. A second strap is connected with the other end of the traction member and is provided with a sleeve for receiving therethrough the ramped serrations portion of the first strap, wherein a detent engages the ramped serrations in a ratchet-type manner so as to permit the first strap to slide in the sleeve in only one direction. The traction member may be provided with an engagement surface having an irregular contour to thereby enhance traction of the tire with respect to the surface in question.

Abstract: A tire chain ramp member in cooperation with a tire chain assembly is arranged to receive the cross link portion of the tire chain within a groove directed into the top wall of the ramp structure. The ramp top wall accommodates a tire member thereon to permit case of mounting of the tire chain assembly relative to the vehicle tire, wherein subsequently the vehicle is driven from the ramp.

Abstract: An antiskid device for vehicle wheels, having a retaining device which is coaxially attached on one side of the wheel rim or the wheel disc and which via arms disposed transversely of the running direction and engaging over the wheel running surface retains an antiskid chain bearing against the wheel running surface, the arms being pivotably attached to the retaining device via joints whose pivots are at right angles to the wheel axle and to the wheel radius extending through the joint, while via the joint the arms can also be pivoted around an axis parallel to the wheel axle, the arm ends attached in the joint being located in a recess in the retaining device which opens in the direction of the wheel side and has inclined lateral surfaces which return the arm end from an inclined position to a radial position.

Abstract: A tire chain has an inside annular body, and a contractile connector including an elastic body connected and fixed to the inside annular body, a first connecting member and a second connecting member which are movable along the elastic body and are connectable, and a connecting and fixing tool which maintains a connected state of the connecting members. The first and the second connecting members are also connected to ends of the inside annular body. As the connecting members are moved along the elastic body, the effective length of the inside annular body changes due to the elastic body and thus, both ends of the inside annular body can be connected easily.

Abstract: A tire anti-skid device comprises a mounting member removably mounted on a side surface of a wheel of an automobile in such a manner as to be coaxial with the wheel; a plurality of arms made of elastic bodies, which radially extend from the mounting member; ground-contact portions each being formed by bending the leading edge of each of the arms, which are intended to be brought in contact with a tire tread surface; a ground-contact ring for connecting the adjacent ground-contact portions with each other, which is intended to be brought in contact with the tire tread surface; and reverse portions each being formed at a junction portion between the arm and the ground-contact portion, which are intended to reverse the ground-contact portions in such a manner that the inner surfaces in contact with the tire tread surface becomes the outer peripheral surfaces.

Abstract: The invention is a sloped apparatus for holding auto tires for the placement of chains around the tires. The apparatus has a pair of sloped surfaces each of which has a notch running across its width. At the top of the apparatus is a cup shaped surface for holding the tire once the auto is driven onto the sloped surfaces. Guides in connection with the sloped surfaces on either side fold back onto the device when not in use and provide for folding up of the apparatus when not in use. The underside of the apparatus contains storage compartments for the tire chain when not in use.

Abstract: A stackable, non-skid snow chain ramp is disclosed for use in the installation of tire chains on both snowy and icy surfaces. The tire ramp is designed with a grooved top and bottom surface and is operated by laying a pair of the ramps in parallel, spaced the distance equal to the separation of the automobile wheels. Tire chains are then laid over the spaced ramps with the cross links of the chains inserted into spaced chain grooves. The tire is then driven up onto the ramp and brought to rest against a tire block and positioned within a wheel well constructed in the ramp. The chains are then wrapped around the tires and connected in a traditional manner. The bottom surface of the ramps contain a combination of grooves and replaceable spikes for use in both snow and icy surface conditions. The disclosed ramps are designed to permit symmetrical stacking for easy storage and conveyance.

Abstract: A device for installing tire chains consists of a container for storing the tire chains when not in use and a removable lid which serves as a closure for the container and as an aid for installation. The lid is adapted for supporting the wheel of the vehicle during the chain installation process. The device further includes latch means for removably securing the lid over the open top of the container for the storage of tire chainsOne surface of the lid is provided with a raised platform on which the vehicle wheel rests during the chain installation process. The raised platform extends longitudinally on the upper face of the lid and is provided with a pair of channels which are open at the top and at their ends and which extend normally to the longitudinal axis of the lid for receiving lateral members of the tire chain being installed.

Abstract: A snow chain traction kit for the drive wheels of a wheelchair, the kit including a number of pairs of attachment strips for each wheel and a traction strap for each pair of strips, each of the straps having a plurality of chains for providing traction on ice or snow and each pair of strips being mounted on opposite sides of the wheels, with the straps wrapped around the tire and being attached to one pair of strips.

Abstract: A tire chain tensioning device utilizing a first element which may be a hollow body. The first element engages a second element which is a hollow body having a chamber for accepting the first element. A spring is fixed to the first and second elements and lies within the first and the second elements while urging the first and second elements toward one another. A pair of catches connected to the first and second elements, respectively, are capable of engaging selective links of a tire chain loosely placed over a tire.

Abstract: The anti-skid device includes a housing capable of being removably fastened on an outer side of a vehicle wheel. An anti-skid travel path, formed of chains, is connected to a plurality of radial arms of the housing. The chains are automatically positioned on the wheel of the vehicle upon advancement of the vehicle, when an elastic member extending through the housing pulls the housing in a direction towards the wheel. A lever is provided between the housing and the wheel and includes an extension which extends through a radial passage of a fastening device connected to a nut of the wheel.

Abstract: An anti-skid net body for a tire includes a plurality of cords having crossing portions and open portions, with the crossing portions having a flat shape. At least one rope is fixed to an inside portion of the net body. An actional band and a setting band are detachably connected to an outside portion of the net body, wherein the setting band is connected prior to connecting the actional band, thereby tightly fastening the anti-skid net body to a tire.

Abstract: A device is disclosed herein for releasably retaining a length of chain on a vehicle tire which includes at least one substantially U-shaped strap in end view having an inwardly projecting adjustable extension terminating in an open socket adapted to insertably receive a lug nut carried on the wheel stud of the vehicle. The strap has holes for detachably receiving the opposite ends of the chain so that the length of chain is extended about the periphery of the vehicle tire. Multiple straps may be employed with a flexible retaining band to bias the straps together to hold the chain taut.

Abstract: A tire chain support includes a first top wall canted relative to a second top wall defining an obtuse angle therebetween, wherein the second top wall extends from a forward distal end of side walls of the support to define an upwardly extending ramp directed to the top wall. Spaced parallel ribs define spaced slots therebetween to receive the tire chain mesh in an array aligning the array relative to the tire permitting proper alignment and positioning of the tire chain for securement relative to the tire. A modification of the invention includes an audible alarm arranged for actuation upon proper orientation of the tire relative to the support and to further include an alignment telescoping leg structure for properly orientating the vehicle relative to the support structure.

Abstract: Disclosed is a mounting apparatus for installing either a tire chain or a tire cable onto a tire of a vehicle. Included is a ramped platform having an angled incline with an upper surface transitioning into an elongated top surface. Associated with the top surface are supporting members serving the dual role of supporting the vehicle tire above the top surface and for aligning adjustably in receiving grooves, produced by the supporting members, either the tire chain or the tire cable beneath the supported vehicle tire to facilitate the installation process.

Abstract: An anti-skid device for automobie tires having a plurality of members joined together with hooks wherein mutually spaced tightening end portions of the anti-skid device body which extend radially inward along the side surfaces of a tire when the device body is set on the tire are connected to each other by a length-variable fastener consisting of hooks connected at one ends thereof to the opposed tightening end portions, and a plate having holes in its base portion and pivotably supporting the other ends of the hooks in different holes therein. A length of separation between the opposite tightening end portions can be set smaller than the free length thereof by rotating the plate.

Abstract: A traction system for the tire of a wheel of a motor vehicle for use in snow and ice conditions. A pair of diametrically opposed supports are positioned over the rim of the tire and radially extend over the outer side of the wheel. Traction cables are connected to the pair of opposed supports at the rim of the tire. A resilient bag member is positioned at the axial area of the outer side of the wheel and is connected to the pair of supports. The bag member can be inflated or deflated. When deflated, the bag member draws the pair of supports into a mutal tensile relationship and a mounted gripping relationship with the tire and the wheel. When inflated the bag member eliminates the mutual tensile relationship between the pair of supports and thus degrips the pair of supports from the wheel and the tire. One, two, or more pairs of supports can be connected to the bag member.

Abstract: A tire chain having a tread portion that connects an inner portion with an outer portion. The inner portion is provided with a closure, one closure member of which, from a starting position, can be connectable and releasable from the other closure member via a twisting movement. In the twisted position, a return force is operative that acts in the direction toward the starting position. The torsional movement of this one closure member can be easily undertaken. The return force that is operative in the twisted position automatically returns the closure member, after its release, into its starting position, whereupon the closure is properly closed.

Abstract: The present invention relates to a snow chain for vehicle wheels, whereby the snow chain comprises two chain members adapted to extend along the peripheral tread surface of the vehicle wheel when the snow chain is mounted on said wheel. The snow chain comprises tie bars connecting the chain members to each other and adapted to extend transversely to the tread surface when the snow chain is mounted on the vehicle wheel. The snow chain preferably is mounted on arms which are foldable relative to each other and retractable to a position adjacent an end side of the vehicle wheel by means of a retraction device.

Abstract: An inventive tire chain mounting device includes a pair of spacedly opposite arms, each arm having a lug and a clamping surface, the lug capable of engaging a tire chain and the clamping surface being provided on one end of the arm and capable of being contact with a side of a tire; a plurality of resilient bars connecting the arms, the bars sliding along one another so as to adjust a spacing between the clamping surface and exerting a resilient force reducing the spacing; and a member preventing the bars from sliding along one another. A method for mounting the inventive tire chain mounting device onto a tire is disclosed. The tire chain mounting device can quickly mount tire chains onto an automotive tire.

Abstract: A traction enhancing device for use with a tire on a vehicle to increase traction of the tire during inclement weather is provided. A first traction enhancing member has a predetermined length for mounting around a tire of a vehicle in a position offset from a central axis of the tire. A second traction enhancing member has a predetermined length for mounting around a tire of a vehicle in a position offset from a central axis of the tire and being spaced apart and substantially parallel to the first traction enhancing member. A first connecting member has a first end affixed to said first traction enhancing member and a second end affixed to said second traction enhancing member for securing said first and second traction enhancing members together. The first connecting member is substantially orthogonally positioned relative to the first and second traction enhancing members and is disposed on a first side of the tire.

Abstract: An adjustable U-shaped wire tire chain installer is disclosed comprising an adjustable width, locking base sections and cradles at the ends of the U-shaped legs which permit easy mounting and removal of tire chains, but prevent accidental removal during use. Alternatively adjustable height legs are incorporated.

Abstract: A traction device for use in extracting mired dual wheeled vehicles from a mired condition comprising a block assembly having a plurality of tower members for attachment to and between the wheels of the mired vehicle and a plate assembly for operative engagement by a rotating block assembly to move the mired vehicle to a freed location. The tower assemblies can be quickly dismantled to a transportable size, and readily assembled and installed for needed operation.

Abstract: A gripping device for motor vehicle tires is provided and consists of a band of flexible material that has a plurality of ground gripping outward deformations and a worm-gear hose clamp type drive assembly for securing the band in place across the tread of the tire.

Abstract: A tire chain container apparatus which is comprised of a bottom casing or bottom having an internal storage area for receiving tire chains and which is designed so that it can stand in an upright position. A cover for the casing is formed substantially of a molded plastic material and is adapted to be used as a mounting member for installing a tire chain around a vehicle wheel tire. The container cover is provided with a pair of ramps leading to a somewhat dished or concave upward surface and is provided with a recess in the upper surface to receive a portion of the tire chain. The cover is formed so that it is not only light in weight, but includes internal ribs in order to reinforce the same and structurally accommodate the weight of the vehicle carried by that wheel and tire and supported by the cover. Carrying handles are mounted on the casing for carrying the apparatus and which handles are adapted to hold the cover in place and displaceable to permit removal of the cover.

Abstract: A non-skid device made of side link sleeve and pin chain for the spoked wheels of wheelchairs, bicycles and the like. The chain includes a removable pin to enable assembly of the chain onto the wheel with a spoke of the wheel captured between the free ends of a pair of spaced side links thereof. A slotted plate having major surfaces of larger dimensions than the transverse dimensions of the chain is rigidly fixed to the chain with its slot extending from between the free ends of such pair of spaced side links to the adjacent edge of the plate to pass the spoke upon assembly and removal. One embodiment includes a resilient shoe member. Alternate removable pin structures are described.

Abstract: In tire chains, closures are required to lock tension-chain lines (10) in the tensioned position. A proposed closure is provided with a pull-through orifice (2) for the tension-chain line (10) and with a locking slot (3) adjacent to the pull-through orifice (2). To prevent the particular chain link (9) suspended in the locking slot (3) from working loose, the pull-through orifice (2) is equipped with an elastic insert (11) which forms at least one engagement cam projecting into the locking slot (3).

Abstract: A single tire chain adapted to be placed on an automobile tire and be anchored at its ends in front of and through an opening in the wheel.

Abstract: The present invention relates to a skid protections device (3) for wheels preferably snow chains for vehicle wheels. In order to permit quick and simple assembly of snow chains on vehicle wheels the device according to the invention comprises a power aggregate attached to a wheel, coupled to a bracket thereon. The bracket with skid protection means may be mounted at the wheel with the skid protection means extending in working position around the wheel except a part thereof which is prevented from attaching a working position by the wheel engaging a ground. The power aggregate, in coupled condition, moves the blocked part of the skid protection means to the working position when it is released by rotation of the wheel, the skid protection means in working position is movable in peripheral direction relative to the wheel during rotation.

Abstract: A motor vehicle tire chain system including a plate positioned between a tire rim and a wheel hub, extending outwardly past the tire rim and having a plurality of spaced-apart holes around an external circumference for attaching chain sections. A plurality of individual chain sections, each having a pair of ends adapted to hook in the holes in the plate, position the chain section across the tire tread, traverse the outside of the tire, recross the tire tread and are hooked in the holes on the inside of the tire at a position on the plate opposite the first attaching position. Each chain section is provided with a tensioning device which both tightens the chain and allows it to be easily installed and removed. The chain sections, after mounting on the wheel, are fastened together at their point of common intersection to hold the sections in their positions about the tire tread.

Abstract: This invention is a traction device for a vehicle wheel. It comprises a shoe member adapted to seat onto the tread of a tire. One side of the shoe has upstanding bars for supporting an inwardly extending curvilinear member for bracing against the side wall of the tire adjacent the rim of the wheel. The other side of the shoe is provided with upstanding bars which support a rectangular frame to which is pivotally hinged a base on which is mounted a laterally movable curvilinear member which is clamped against the outside wall of the tire adjacent the rim of the wheel. The clamping device includes a screw means having a head keyed to be rotated by a releasable crank. The clamp device of this invention incorporates screw means which moves to tighten and loosen the clamp member in small increments as well as hinge or pivot means which radially moves a substantial distance to position the clamp member adjacent the tire side wall.

Abstract: An automatic tire chain for driver operated vehicles includes a chain device that is moved to the road contact surface of a tire from a position adjacent thereto by means of a spring mechanism placed under tension when the chain is held away from the road contact surface of the tire. A pair of rings, one being fixed to the wheel and the other being slideably mounted thereon are provided with indexing slots. The slideable ring has a chain affixed thereon and is moved relative to the fixed ring by an operator activated engaging mechanism mounted on the vehicle. The engaging means engages the indexing slots and moves the slideable ring relative to the fixed ring while the vehicle moves along the road at a speed less than 10 miles per hour placing the chain adjacent to the road contact surface of the tire.

Abstract: A motor vehicle tire chain system including a plate positioned between a tire rim and a wheel hub, extending outwardly past the tire rim and having a plurality of spaced-apart holes around an external circumference for attaching chain sections. A plurality of individual chain sections, each having a pair of ends adapted to hook in the holes in the hub, position the chain section across the tire tread, traverse the outside of the tire, recross the tire tread and be hooked in the holes on the inside of the tire at a position on the plate opposite the first attaching position. Each chain section is provided with a tensioning device which both tightens the chain and allows it to be easily installed and removed.

Abstract: The clamping means of the anti-slip device includes a pair of locking members for selectively clamping the overlapping wire ends of the wire in a manner so as to only permit movement in a sense of a shortening of the effective length of the wire. A pair of release members are actuated simultaneously by a frame so as to move the locking members from an inclined position in which the wires are clamped to an upright position in which the wires are free to move through the locking members. The clamping wire is secured within the helical spring forming the resilient pull element at a point diametrically opposite the clamping means. With the anti-slip device fitted onto a wheel and with the release members in a locking position, the locking members allow the clamping means to move relative to the wire ends only in the sense of a shortening of the effective length of the wire.

Abstract: A device for securing the ends of a snow chain together which includes a plate with an aperture near one end thereof for engagement by a hook on one end of the chain, and a threaded hole near the other end thereof into which is threaded a bolt with a manipulating head and a shoulder to engage a link at the other end of the snow chain.

Abstract: A traction enhancing apparatus for attachment to vehicular tires having both circumferential and cross chain members engaging the tread of the tire and further including one or two semi-rigid "U-shaped" bridle members for gripping the tire sidewalls during installation while rotating away from the gripping position so as to be a part of the closure structure after installation of the apparatus on the tire.

Abstract: A snow anti-skid device a plurality of which are to be fitted at intervals around a motor vehicle wheel. Each device is in the form of a horseshoe-shaped strip-form yoke or stirrup comprised of a thickened central yoke section with curved limbs (20) for embracing the tire (15) extending away from opposite sides thereof. The free ends of the limbs are in the form of claws provided with magnets which engage under and adhere to the shoulders of the wheel rim. The thickened central region of the yoke may be provided with a coating of a resilient material, which can be molded on so as to extend through openings in the strip and provide a non-slip surface abutting the tread of the tire and a studded surface for engaging the ground. One or both limbs of the yoke or stirrup may be resiliently longitudinally extensible, or may be adapted for positive adjustment of its length.

Abstract: A tire-chain assembly for a vehicle-mounted wheel basically comprises annular inner and outer holders respectively engaging the inner and outer faces of the wheel. At least one traction chain crisscrosses over the road-engaging surface of the wheel between the two holders. The inner holder is provided with a flexible element that tightens the chain on the road-engaging surface. The outer end of the flexible element, which may be a chain, a rope or the like, is then secured to the holder on one of the surfaces of the wheel. There is provided a tightening mechanism so as to ensure self-locking of the tire-chain assembly on the wheel.

Abstract: A wooden block, upon which an automobile wheel can climb, to facilitate tire chain installation, the block including an inclined ramp at one end, and a pair of transverse grooves across its top for receiving the chain; and the block, in a modified design, including a warning bell, so a wheel does not roll off the opposite end of the block.

Abstract: A tire-chain assembly for a vehicle-mounted wheel basically comprises annular inner and outer holders respectively engaging the inner and outer faces of the wheel. At least one traction chain crisscrosses over the road-engaging surface of the wheel between the two holders. The inner holder is of variable diameter, so that it can be fitted over the tire and then have its diameter decreased to allow the traction chain to be tightened on the wheel. Mechanism on this inner holder is connected via a flexible element that passes over the road-engaging surface of the wheel to the outer face of the wheel so that a pull on this mechanism will reduce the diameter of the inner holder and tighten the chain assembly on the wheel. The outer end of this flexible element, which may be a chain, is then secured to the holder on the outer surface of the wheel.

Abstract: A clip made of a single flat spring strip with a hook portion at one end insertable between the rim and the exposed wall of the tire adjacent the rim, and a cylindrical loop formed from its other end opposite to said hook so that free edge of the loop is substantially at the same level as the top of the hook and is spaced therefrom to a distance narrower than the thickness of a link or hook at the end of a snow chain thereby to prevent accidental disengagement of the chain link.

Abstract: A vehicle traction device for rubber tired vehicular wheels, comprising a traction unit in the form of, for instance, a wire netting or chain equipped with a tightening mechanism for the traction unit and effective at least at one side of the wheel in the circumferential direction in the mounted condition of the vehicle traction device. This tightening mechanism comprises a tensioning element extending in the circumferential direction of the wheel and elastically constructed at least over a part of its extent and a tightening or tensioning wire which likewise extends in the circumferential direction. One end of the tightening wire is fastened to a body member of a tightening lock of the tightening mechanism and the other end is guided through a blocking element arranged in the tightening lock. When the vehicle traction device is mounted, the blocking element allows displacement of the tightening lock relative to the tightening wire only in the sense of shortening the effective length of the tightening wire.

Abstract: An apparatus for setting a non-skid chain on a car tire comprises a bed adapted to be placed on the ground and having a mounting surface for placing the car tire thereon, the mounting surface having a plurality of grooves for putting the chain therein. The bed consists of first and second bed sections, the first and second bed sections respectively having a substantially flat and inclined surfaces for cooperating to form the mounting surface of the bed, the first and second bed sections having adjacent lower edges. A hinge is disposed between the adjacent lower edges of the two bed sections connecting the two bed sections for allowing the bed to be folded. Preferably, the two bed sections have lower surfaces respectively having recesses therein for cooperating to form an internal space which can accommodate car tools, such as the chain when the bed is folded.