Tire chain attachment tool

Abstract

To provide a tire chain attachment tool capable of easily attaching tire chains to large tires. [Solution] A U-shaped metal fitting 32R to which one end of the right side chain can be connected is provided on the right side of the attachment device main body 2, and a U-shaped metal fitting 32L to which one end of the left side chain can be connected is provided on the left side of the attachment device main body 2, and a U-shaped metal fitting 31 to which a chain block can be connected is provided on the center side in the left-right direction of the attachment device main body 2. As a result, one ends of the right and left side chains are connected to the U-shaped metal fittings 32R, 32L of the attachment device main body 2, and the chain of the chain block is connected to the U-shaped metal fitting 31. By pulling the attachment device main body 2 in the direction to attach the tire chains with the chain block, the left and right side chains are pulled by the attachment device main body 2 and wound around the tire, allowing the tire chain to be wound around the tire.

Description

[Technical Field]

[0001] This invention relates to a mounting tool for mounting tire chains on tires. [Background technology]

[0002] Conventionally, there has been a chain hanger (corresponding to an attachment device) for attaching tire chains, which is used by placing a wheel on a chain laid on the road surface. This chain hanger is made of a roughly semicircular rigid body equipped with a gripping portion, and hooks are fixed at both ends of at least the semicircular portion of the chain hanger. A method has been proposed (for example, Patent Document 1) for winding a chain around a wheel in such a way that the end of the chain or a portion near it is engaged with the hook, and the chain hanger is moved along the outer circumference of the wheel to release the engagement. In addition, a tire chain attachment device has been proposed (for example, Patent Document 2), which is a support consisting of a locking rod that can be straddled by a vehicle tire, a storage tube that can store this locking rod, and a gripping portion provided on the storage tube, and which is configured to lock and lift the side chain of a tire chain using the tip of the locking rod of the support and a pair of hooks provided on the tip of the storage tube of the support, and then wrap the locked and lifted tire chain around the tire by manually supporting the gripping portion.By using these chain attachment devices, it is possible to improve the efficiency of chain attachment work, which was previously done manually.

[0003] However, for large vehicles such as snowplows, the tire chains to be attached are large and heavy, making it difficult to manually lift the attachment device that holds the end of the chain and wrap the chain around the outer circumference of the tire. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Unexamined Patent Publication No. 47-30005 [Patent Document 2] Patent No. 2914910 Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, the present invention is intended to solve the above problems, and has as its object to provide a tire chain attaching tool that can easily attach tire chains to large tires. [Means for solving the problem]

[0006] The invention of claim 1 is a tire chain attachment device that attaches a tire chain, which has a pair of right and left side chains and a cross chain between the right and left side chains, to the tire by pulling it along the outer circumference of the tire using the attachment device main body, characterized in that a right connection receiving part to which one end of the right side chain can be connected is provided on the right side of the attachment device main body, a left connection receiving part to which one end of the left side chain can be connected is provided on the left side of the attachment device main body, and a tensioning means connection receiving part to which a tensioning means can be connected is provided on the center of the left and right direction of the attachment device main body.

[0007] The invention of claim 2 is characterized in that the direction intersecting the left-right direction of the mounting device main body is the front-rear direction, the tension means connection receiving portion is provided on the front side of the mounting device main body, and the right side connection receiving portion and the left side connection receiving portion are provided on the rear side of the mounting device main body, and the mounting device main body is provided with a rear side rolling member in the left-right direction between the right side connection receiving portion and the left side connection receiving portion that rolls on the outer periphery of the tire.

[0008] The device of claim 3 is such that the attachment main body comprises left and right vertical rods arranged on the left and right sides in the front-rear direction, the front horizontal rod in the left and right direction connecting the front sides of the left and right vertical rods, and the rear horizontal rod in the left and right direction provided on the rear side between the left and right vertical rods, and the rear horizontal rod comprises a rear vertical rod left part and a rear horizontal rod right part whose base ends are fixed to the left and right vertical rods, and the cylindrical rear rolling members whose tips of the rear vertical rod left part and the rear horizontal rod right part are rotatably inserted into the left and right end parts, and the tension means connection receiving part is provided to protrude forward from the center side in the left and right direction of the front horizontal rod, and the right connection receiving part and the left connection receiving part are provided to protrude rearward from the right rear horizontal rod part and the left rear horizontal rod part, and the right connection receiving part and the left connection receiving part the spacing between the front and rear horizontal rods is wider than the width of the tire, a central rolling member in the left-right direction that rolls on the outer periphery of the tire is provided between the front horizontal rod and the rear horizontal rod, the outer peripheries of the front horizontal rod, the central rolling member and the rear rolling member are cylindrical, the central rolling member is provided between the left and right vertical rods so as to be rotatable around the central axis in the left-right direction, the rear rolling member is provided between the right connection receiving portion and the left connection receiving portion so as to be rotatable around the central axis in the left-right direction, and the left-right position of the rear rolling member is restricted by the right connection receiving portion and the left connection receiving portion, and the outer diameter of the rear rolling member is larger than the outer diameter of the central rolling member.

[0009] The invention of claim 4 is characterized in that the mounting device main body comprises left and right vertical rods arranged on the left and right in the front-to-rear direction, the front horizontal rod in the left and right direction connecting the front sides of these left and right vertical rods, and the rear horizontal rod in the left and right direction provided on the rear side between the left and right vertical rods, the tension means connection receiving portion protruding forward from the center in the left and right direction of the front horizontal rod, the right connection receiving portion and the left connection receiving portion protruding rearward from the right and left side of the rear horizontal rod, and the rear ends of the right connection receiving portion and the left connection receiving portion are located forward of the rear ends of the left and right vertical rods, and left and right vertical rod leg portions protruding rearward from the position of the rear horizontal rod are provided on the rear sides of the left and right vertical rods, the inner spacing between these left and right vertical rod leg portions is wider than the width of the tire, and the rear sides of the left and right vertical rod leg portions are provided with bent portions whose mutual lateral spacing widens toward the rear ends.

[0010] The invention of claim 5 is characterized in that the pulling means is a chain block, and the hoisting chain of this chain block can be connected to and disconnected from the pulling means connection receiving portion.

[0011] The invention of claim 6 is characterized in that, in the tire chain mounting device described in any one of claims 2 to 5, it is provided with a covering member, the covering member having elasticity and comprising a strip-shaped body that is wrapped around the outer circumference of the tire, and a connecting member that connects one end and the other end of the strip-shaped body wrapped around the outer circumference of the tire.

[0012] The invention of claim 7 is characterized in that the connecting member comprises a connecting plate made of a hard material and arranged on the outer surface of the strip, spanning one end and the other end of the strip; a one-end bolt inserted into an outer through hole drilled on one end of the connecting plate and an inner through hole drilled at one end of the strip; an other-end bolt inserted into an outer through hole drilled on the other end of the connecting plate and an inner through hole drilled at the other end of the strip; and a one-end nut and an other-end nut threaded onto the tip of the one-end bolt and the tip of the other-end bolt inserted into the inner through hole and the outer through hole from the inner surface side of the strip. [Effects of the Invention]

[0013] According to the configuration of claim 1, one end of the right side chain and one end of the left side chain are connected to the right and left connection receiving portions of the attachment body, and a pulling means is connected to the pulling means connection receiving portion.By using the pulling means to pull the attachment body along the outer circumference of the tire in the direction of attaching the tire chain, the left and right side chains are pulled by the attachment body and wrapped around the tire, and the tire chain can be wrapped around the tire.

[0014] According to the configuration of claim 2, the mounting device main body is disposed at the bottom of one side in the front-rear direction of the tire, and when the mounting device main body is pulled up to the other side in the front-rear direction by the pulling means, the rear rolling member rolls on the outer periphery of the tire, allowing the mounting device main body to be pulled smoothly along the outer periphery of the tire. In this case, since one end of the side chain is connected to the rear side of the mounting device main body, the weight of the tire chain makes it easy for the rear side of the mounting device main body to come into contact with the outer periphery of the tire, and by disposing the rear rolling member, the mounting device main body can be pulled smoothly.

[0015] According to the configuration of claim 3, with one end of each side chain connected to the rear right and left connection receiving portions, a tensioning means is connected to the front central tensioning member connection receiving portion in the left-right direction, allowing the attachment body to be pulled in a balanced state in the left-right direction. Furthermore, when the attachment body is positioned so that the right and left connection receiving portions sandwich the tire in the width direction, and the attachment body is pulled, the central and rear rolling members come into contact with the tire's outer periphery, causing these rolling members to rotate. Even if the front cross rod comes into contact with the tire's outer periphery, the cylindrical outer periphery allows the attachment body to move smoothly along the tire's outer periphery. Furthermore, because the rear rolling member, which is likely to come into contact with the tire's outer periphery, has a large diameter, the attachment body can be pulled smoothly. Furthermore, because the attachment body is pulled while sandwiching the tire between the right and left connection receiving portions, the side chains can be guided to the left and right side surfaces of the tire. Furthermore, by rotatably inserting the tips of the left part of the rear vertical rod and the right part of the rear horizontal rod into the left and right ends of the cylindrical rear rolling member, the rear rolling member can be rotatably arranged between the right part of the rear horizontal rod, which has a right-side connecting receiving portion, and the left part of the rear vertical rod, which has a left-side connecting receiving portion.

[0016] According to the configuration of claim 4, when the mounting device main body moves along the outer circumference of the tire, even if the mounting device main body becomes oblique to the front-to-rear direction and the rear end of the vertical rod leg portion is about to come into contact with the outer surface of the tire, the bent portion comes into contact with the outer surface of the tire, thereby preventing damage to the tire.

[0017] According to the configuration of claim 5, the attachment body can be easily pulled using a chain block.

[0018] According to the configuration of claim 6, when the band-shaped body is wrapped around the tire and one end is connected to the other end with a connecting member to attach the band-shaped body to the tire, when the tire chain is pulled and wrapped around the attachment body, the band-shaped body hides the grooves on the outer circumference of the tire, eliminating unevenness, making it easier to move the attachment body along the outer circumference of the tire. Also, because the band-shaped body covers the unevenness of the tire grooves, it is less likely to damage the road surface, and because the tire chain does not come into direct contact with the outer circumference of the tire, it is less likely to damage the tire even when driving with tire chains attached.

[0019] According to the configuration of claim 7, the connecting plate can ensure the connecting strength between one end and the other end of the elastic strip, and the one end and the other end can be easily connected using bolts and nuts. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a front view of a wearing device main body according to a first embodiment of the present invention; [Figure 2] FIG. [Figure 3] 10 is a development view of the tire chain. [Figure 4] FIG. [Figure 5] FIG. 10 is a side view of the same in a state where the mounting device main body has been moved to the top of the tire. [Figure 6] FIG. 10 is a side view of the same in a state where the mounting device main body has been moved to the front lower side of the tire. [Figure 7] FIG. 10 is a side view of the same with the mounting device body removed from the tire chain. [Figure 8] FIG. 4 is a side view of a tire chain mounting tool according to a second embodiment of the present invention. [Figure 9] FIG. 10 is a side view illustrating the attachment of a band-shaped body to a tire according to a third embodiment of the present invention. [Figure 10]FIG. [Figure 11] FIG. 10 is a cross-sectional view of the connecting member of the covering member. DETAILED DESCRIPTION OF THE INVENTION

[0021] Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that the embodiments described below do not limit the content of the present invention described in the scope of the utility model registration. Furthermore, not all of the configurations described below are necessarily essential requirements for the present invention. [Example]

[0022] 1 to 7 show a first embodiment of the present invention. As shown in the figures, the tire chain attachment device 1 comprises a metal attachment device main body 2 and a chain block 5 serving as a pulling means for attaching a tire chain 3 to a tire 4 by pulling the attachment device main body 2. The tire 4 is exemplified by a large tire such as that of a snowplow (not shown). The attachment device main body 2 is plated.

[0023] As shown in Figure 3, the tire chain 3 comprises a pair of right and left side chains 7R and 7L arranged parallel to each other with a gap in the left-right direction, a left-right cross chain 8 provided between the right and left side chains 7R and 7L to connect the right and left side chains 7R and 7L, and a diagonal cross chain 8A.

[0024] As shown in FIG. 1, the attachment body 2 is made of a metal pipe bent into a roughly U-shape and integrally comprises left and right vertical rods 11L, 11R arranged on the left and right in the front-to-rear direction, and a front horizontal rod 14 connected to the left and right vertical rods 11L, 11R by bent portions 13, 13, and the front horizontal rod 14 is formed longer than the left and right vertical rods 11L, 11R.

[0025] The mounting device main body 2 also includes a left-right rear horizontal rod 15 provided on the rear side between the left and right vertical rods 11L, 11R. This rear horizontal rod 15 includes a left rear horizontal rod portion 15L on the left side, a right rear horizontal rod portion 15R on the right side, and a rear rolling member 18 in the left-right center. The right rear horizontal rod portion 15R and the left rear horizontal rod portion 15L are made of the same metal pipe as the front horizontal rod 14, and their outer base ends in the left-right direction are fixed to the inside of the mounting device main body 2 on the outer circumferential surfaces of the left and right vertical rods 11L, 11R by welds 15Y, 15Y, and the tips 15S, 15S of the right rear horizontal rod portion 15R and the left rear horizontal rod portion 15L are spaced apart.

[0026] In addition, the rear rolling member 18 is made of a metal pipe having a larger diameter than the rear left horizontal rod portion 15L and the rear right horizontal rod portion 15R, and by rotatably inserting the tips 15S, 15S of the rear left horizontal rod portion 15L and the rear right horizontal rod portion 15R into the left and right ends of the rear rolling member 18, the rear rolling member 18 is rotatably mounted on the rear left horizontal rod portion 15L and the rear right horizontal rod portion 15R around a central axis in the left-right direction.

[0027] In addition, the portions of the left and right vertical rods 11L, 11R rearward of the position of the welded portions 15Y, 15Y form vertical rod leg portions 16, 16, and the rear ends of these vertical rod leg portions 16, 16 are formed at an outward angle toward the rear by a curved bend portion 17, so that the spacing on the rear end side of the vertical rod leg portions 16, 16 widens toward the rear end.

[0028] The left and right vertical rods 11L, 11R in the front-rear direction are substantially parallel to each other, and the front horizontal rod 14 and the rear horizontal rod 15 in the left-right direction are parallel to each other. A central rolling member 21 in the left-right direction is disposed between the front horizontal rod 14 and the rear horizontal rod 15 and is parallel to them. In this way, the mounting device main body 2 is provided with a plurality of rolling members 21, 18 spaced apart from each other in the front-rear direction and lined up in the front-rear direction.

[0029] The rolling member 21 is made of a metal pipe and is rotatably mounted between the left and right vertical rods 11L, 11R by means of mounting means 22. As an example, the mounting means 22 includes a metal rod 23 serving as a rotation center shaft, which is inserted into left and right through holes 24, 24 formed in the left and right vertical rods 11L, 11R and loosely inserted into the rolling member 21, and nuts 25, 25 are screwed onto both ends of the rod 23, thereby mounting the central rolling member 21 in a rotatable manner.

[0030] The central axes of the front cross rod 14, the rear cross rod 15, and the central rolling member 21 are arranged in parallel, and as shown in Figure 2, the central axes of the front cross rod 14, the rear cross rod 15, and the central rolling member 21 are located on the same plane, and the outer diameter of the central rolling member 21 is formed larger than the outer diameters of the front cross rod 14 and the rear cross rod 15.

[0031] The left and right vertical rods 11L, 11R, the front horizontal rod 14, and the rear horizontal rod 15 have the same diameter, and the central axes of the left and right vertical rods 11L, 11R, the front horizontal rod 14, and the rear horizontal rod 15 are located on the same plane.

[0032] A U-shaped metal fitting 31, which serves as a connection receiving part for the tensioning means, is provided on the front side of the center of the front horizontal rod 14 in the left-right direction.This U-shaped metal fitting 31 is made by bending a metal bar into a U shape, and both end portions 31T, 31T are welded and fixed to the front side of the outer peripheral surface of the front horizontal rod 14, and it protrudes forward from the front side of the front horizontal rod 14.

[0033] In addition, on the rear side of the right and left sides of the rear cross rod 15, the right rear cross rod part 15R and the left rear cross rod part 15L, there are provided U-shaped fittings 32R, which are the right connecting receptacles, and U-shaped fittings 32L, which are the left connecting receptacles, and both end parts 32T, 32T of these U-shaped fittings 32R, 32L are welded and fixed to the rear side of the outer peripheral surface of the rear cross rod 15, and these U-shaped fittings 32R, 32L protrude rearward from the rear side of the rear cross rod 15.

[0034] The inner distance W1 between the right and left U-shaped metal fittings 32R, 32L is wider than the width of the tire 4, and the inner distance W between the left and right vertical rod leg portions 16, 16 is wider than the width of the tire 4. The rear ends of the U-shaped metal fittings 32R, 32L are located forward of the rear end positions of the left and right vertical rod leg portions 16, 16.

[0035] Furthermore, the rear rolling member 18 is shorter than the inner spacing W1, and the ends of the rear rolling member 18 come into contact with the U-shaped metal fittings 32R, 32L, thereby restricting the left-right position of the rear rolling member 18 by the U-shaped metal fittings 32R, 32L.

[0036] The wearing tool body 2 provided with the U-shaped metal fittings 31, 32R, 32L has a symmetrical shape and can be used without worrying about the front and back orientation.

[0037] As shown in Figure 4, the chain block 5, which is the pulling means, has a rotating handle 42 on a main body 41, and by operating this handle 42, a chain 43 is wound up. The main body 41 is provided with a hook 44 for connecting to the main body, and a hook 45 is provided at the end of the chain 43, which can be connected to and disconnected from the U-shaped metal fitting 31.

[0038] In addition, by operating a switching operation unit (not shown) provided on the main body 41, the chain block 5 can be switched between a winding-up operation in which the chain 43 is wound up in a direction in which the hook 45 approaches the main body 41, and a winding-down operation in which the chain 43 is wound down in a direction in which the hook 45 moves away from the main body 41.

[0039] As shown in Figure 2, a shackle 51, which is a cable connector, comprises a U-shaped shackle body 52 and a shackle shaft 53 that opens and closes the opening between both ends of the shackle body 52. In this example, one end of the shackle body 52 has an insertion hole 54 through which the shackle shaft 53 is inserted, and the other end of the shackle body 52 has a female screw portion 55 that screws into a male screw portion 53N provided at the tip of the shackle shaft 53.

[0040] Next, an example of a method for attaching tire chains 3 using the attachment device main body 2 will be described. First, the tire 4 to which the tire chains 3 will be attached is jacked up. In this case, by jacking up the left and right tires 4, 4, the left and right tires 4, 4 can be rotated together. Note that Figures 4 to 7 show the front tires 4 of a snowplow.

[0041] One end of the right side chain 7R and one end of the left side chain 7L are connected to the U-shaped bracket 32R, which is the right connection receiving portion, and the U-shaped bracket 32L, which is the left connection receiving portion. In this case, for example, as shown in FIG. 4, the attachment device main body 2 is placed upright at the rear lower part of the tire 4, and in this state, the hook 44 of the chain block 5 is connected to the connection receiving portion 63 of the front fixing part 62 of the tire 4, and the hook 45 of the chain block 5 is connected to the U-shaped bracket 31, which is the connection receiving portion for the tension member. Alternatively, the chain 43 of the chain block 5 may be placed upright so as to be hung on the upper outer periphery of the tire 4. Furthermore, the hook 45 may be connected to the U-shaped bracket 31 with a shackle 51, or the chain 43 may be connected to the U-shaped bracket 31 with the shackle 51 without providing the hook 45.

[0042] 4, the tire chain 3 is laid in the front-to-rear direction on the ground 61 behind the tire 4, and one end of the right and left side chains 7R, 7L is connected to the U-shaped metal fittings 32R, 32L. In this case, as shown in FIG. 4, when the left and right vertical rod legs 16, 16 are grounded and the attachment device main body 2 is leaned against the tire 4, the U-shaped metal fittings 32R, 32L are positioned away from the ground 61, and one end of the side chains 7R, 7L can be easily connected to the U-shaped metal fittings 32R, 32L. Of course, the attachment device main body 2 may be laid flat on the ground 61, and the side chains 7R, 7L may then be connected, and the attachment device main body 2 may then be positioned upright below the rear of the tire 4 as shown in FIG. 4.

[0043] The shackle 51 is used to connect the side chains 7R, 7L, and with the shackle body 52 hanging from the U-shaped metal fittings 32R, 32L, the tip of the shackle shaft 53 is inserted into the insertion hole 54, and the tip of the shackle shaft 53 is inserted into the ring on one end of the side chains 7R, 7L between both ends of the shackle body 52, and the shackle shaft 53 is screwed into the female screw portion 55, thereby connecting one end of the side chains 7R, 7L to the U-shaped metal fittings 32R, 32L using the shackle 51.

[0044] In this way, one end of the right and left side chains 7R, 7L is connected to the attachment body 2, the hook 45 of the chain block 5 is connected to the U-shaped metal fitting 31 which serves as the connection receiving part for the front pulling means, the chain 43 is placed on the front side along the outer periphery of the tire 4, and the body 41 of the chain block 5 is connected to the fixing part 62.

[0045] The main body 41 is positioned below the center of the tire 4, and the chain 43 between the main body 41 and the upper part of the tire 4 is arranged diagonally so that it lowers toward the front, as shown in FIG. 4. Then, the handle 42 is operated to pull the chain 43 downward toward the front. Initially, the attachment main body 2 is pulled upward, and when it exceeds the height of the center of the tire 4, the front side tilts forward (FIG. 5). In this case, the rear rolling member 18 and the central rolling member 21 roll on the outer circumferential surface of the tire 4, allowing for smooth pulling. In this way, the central rolling member 21 is provided in front of the rear rolling member 18.

[0046] In particular, since one end of the side chains 7R, 7L is connected to the rear side of the mounting device main body 2, the weight of the tire chain 3 makes it easy for the rear side of the mounting device main body 2 to come into contact with the outer periphery of the tire 4, and by arranging a rear rolling member 18 with a large diameter on the rear side, the mounting device main body 2 can be pulled smoothly.

[0047] The rotation of the left and right tires 4, 4 of the jacked-up vehicle is not locked and they can rotate, but because the tires 4 are large, the tires 4 will not rotate even if the attachment body 2 is pulled by the chain block 5.

[0048] After using the chain block 5 to pull the attachment device main body 2 above the tire 4, for example, to the position shown in Figure 5, the other ends of the side chains 7R, 7L are moved to the front lower part as shown in Figure 6, and the tire chain 3 is placed under the tire 4. Then, the tire 4 is turned so that the attachment device main body 2 moves downward by human power or the like from the position shown in Figure 5 to the position shown in Figure 6. After this, as shown in Figure 7, one end of the side chains 7R, 7L is detached from the attachment device main body 2, the attachment device main body 2 is removed, and one end of the side chains 7R, 7L is connected to the other end, allowing the tire chain 3 to be attached to the tire 4.

[0049] Since the attachment device main body 2 is connected to the chain block 5 in the position shown in Figure 5, the tire 4 does not rotate clockwise. Alternatively, the attachment device main body 2 may be pulled by the chain block 5 from the position shown in Figure 5 to near the position shown in Figure 6, or the tire 4 may be rotated using a combination of the chain block 5 and human power until the attachment device main body 2 reaches the position shown in Figure 6 or below.

[0050] Thus, in this embodiment, corresponding to claim 1, a tire chain 3 comprising a pair of right and left side chains 7R and 7L and a cross chain 8, 8A provided between the right and left side chains 7R, 7L is attached to a tire 4 by pulling the tire chain 3 along the outer periphery of the tire 4 using the attachment body 2. On the right side of the attachment body 2, a U-shaped metal fitting 32R is provided as a right-side connecting receptacle to which one end of the right side chain 7R can be connected, and on the left side of the attachment body 2, a U-shaped metal fitting 32L is provided as a left-side connecting receptacle to which one end of the left side chain 7L can be connected. A U-shaped metal fitting 31 serving as a connection receiver for the pulling means, to which the chain block 5 serving as the pulling means can be connected, is provided on the left-right center side of the attachment device main body 2. Therefore, by connecting one end of the right side chain 7R and one end of the left side chain 7L to the U-shaped metal fittings 32R, 32L of the attachment device main body 2 and connecting the chain 43 of the chain block 5 to the U-shaped metal fitting 31 and using the chain block 5 to pull the attachment device main body 2 along the outer periphery of the tire 4 in the direction in which the tire chain 3 is attached, the left and right side chains 7L, 7R are pulled by the attachment device main body 2 and wound around the tire 4, and the tire chain 3 can be wound around the tire 4.

[0051] As described above, in this embodiment, in accordance with claim 2, the direction of the mounting device main body 2 that intersects with the left-right direction is the front-rear direction, the U-shaped metal fitting 31 serving as the connection receiver for the pulling means is provided on the front side of the mounting device main body 2, the U-shaped metal fitting 32R serving as the right-side connection receiver and the U-shaped metal fitting 32L serving as the left-side connection receiver are provided on the rear side of the mounting device main body 2, and the mounting device main body 2 is provided with a rear rolling member 18 in the left-right direction that rolls on the outer periphery of the tire 4 between the U-shaped metal fitting 32R serving as the right-side connection receiver and the U-shaped metal fitting 32L serving as the left-side connection receiver. Therefore, when the mounting device main body 2 is placed under one side of the tire 4 in the front-rear direction and the mounting device main body 2 is pulled up to the other side in the front-rear direction by the chain block 5, the rear rolling member 18 rolls on the outer periphery of the tire 4, and the mounting device main body 2 can be pulled smoothly along the outer periphery of the tire 4. In this case, one end of the side chains 7R, 7L is connected to the rear side of the mounting device main body 2, so the weight of the tire chain 3 makes it easy for the rear side of the mounting device main body 2 to come into contact with the outer periphery of the tire 4, and by arranging the rear rolling member 18, the mounting device main body 2 can be pulled smoothly.

[0052] As described above, in this embodiment, corresponding to claim 3, the wearing device main body 2 includes left and right vertical rods 11L, 11R arranged on the left and right in the front-rear direction, a left and right front horizontal rod 14 connecting the front sides of these left and right vertical rods 11L, 11R, and a left and right rear horizontal rod 15 provided on the rear side between the left and right vertical rods 11L, 11R, and the rear horizontal rod 15 includes a left rear horizontal rod portion 15L and a right rear horizontal rod portion 15R whose base ends are fixed to the left and right vertical rods 11L, 11R, and a cylindrical rear rolling member 18 into which the tips 15S, 15S of the right rear cross rod portion 15R are rotatably inserted at the left and right ends thereof, a U-shaped metal fitting 31 serving as a connecting receiving portion for a pulling means is protruded forward from the center of the front cross rod 14 in the left-right direction, a U-shaped metal fitting 32R serving as a right connecting receiving portion and a U-shaped metal fitting 32L serving as a left connecting receiving portion are protruded rearward from the right rear cross rod portion 15R and the left rear cross rod portion 15L, and an inner distance W1 between the U-shaped metal fittings 32R and 32L is wider than the width of the tire 4, Between the front horizontal rod 14 and the rear horizontal rod 15, a central rolling member 21 is provided in the left-right direction, which rolls on the outer periphery of the tire 4. The outer peripheries of the front horizontal rod 14, the central rolling member 21, and the rear rolling member 18 are cylindrical. The central rolling member 21 is provided between the left and right vertical rods 11L, 11R so as to be rotatable about a central axis in the left-right direction. The rear rolling member 18 is provided between the U-shaped metal fittings 32R and 32L so as to be rotatable about a central axis in the left-right direction. The left-right position of the side rolling member 18 is restricted by the U-shaped metal fittings 32R and 32L, and because the outer diameter of the rear rolling member 18 is larger than the outer diameter of the central rolling member 21, with one end of the left and right side chains 7R, 7L connected to the rear U-shaped metal fittings 32R and 32L, the chain block 5 serving as the pulling means can be connected to the front U-shaped metal fitting 31 on the central side in the left-right direction, and the attachment body 2 can be pulled in a state of balance in the left-right direction. Furthermore, when the attachment body 2 is positioned so that the tire 4 is sandwiched between the U-shaped metal fittings 32R and 32L in the width direction and the attachment body 2 is pulled, the central rolling member 21 and the rear rolling member 18 come into contact with the outer periphery of the tire 4, causing these rolling members 21, 18 to rotate, and even when the front cross rod 14 comes into contact with the outer periphery of the tire 4, the outer periphery is cylindrical, so the attachment body 2 can be moved smoothly along the outer periphery of the tire 4.Furthermore, because the rear rolling member 18, which is likely to come into contact with the outer periphery of the tire 4, has a large diameter, the attachment body 2 can be pulled smoothly. Also, because the attachment body 2 is pulled with the tire 4 sandwiched between the U-shaped metal fittings 32R and 32L, the side chains 7R, 7L can be guided to the left and right side surfaces of the tire 4. Also, by rotatably inserting the tips 15S, 15S of the left rear cross rod portion 15L and the right rear cross rod portion 15R into the left and right ends of the cylindrical rear rolling member 18, the rear rolling member 18 can be rotatably provided between the right rear cross rod portion 15R on which the U-shaped metal fitting 32R is provided and the left rear cross rod portion 15L on which the U-shaped metal fitting 32L is provided.

[0053] As described above, in this embodiment, corresponding to claim 4, the attachment main body 2 comprises left and right vertical rods 11L, 11R arranged on the left and right in the front-rear direction, a left and right front horizontal rod 14 connecting the front sides of these left and right vertical rods 11L, 11R, and a left and right rear horizontal rod 15 provided on the rear side between the left and right vertical rods 11L, 11R, and a U-shaped metal fitting 31 serving as a connection receiving portion for a pulling means is provided to protrude forward from the center of the left and right direction of the front horizontal rod 14, and a U-shaped metal fitting 32R serving as a right connection receiving portion and a U-shaped metal fitting 32L serving as a left connection receiving portion are provided to protrude rearward from the right and left sides of the rear horizontal rod 15, and the rear ends of the U-shaped metal fittings 32R, 32L are located further away from the rear ends of the left and right vertical rods 11L, 11R. Located at the front, left and right vertical rod leg portions 16, 16 are provided on the rear sides of the left and right vertical rods 11L, 11R, protruding rearward from the position of the rear horizontal rod 15, and the inner spacing W between these left and right vertical rod leg portions 16, 16 is wider than the width of the tire 4, and at the rear sides of the left and right vertical rod leg portions 16, 16, bent portions 17, 17 are provided so that the left and right spacing between them widens toward the rear ends.Therefore, when the mounting device main body 2 moves along the outer periphery of the tire 4, even if the mounting device main body 2 is oblique to the front-to-rear direction and the rear ends of the vertical rod leg portions 16, 16 are about to come into contact with the outer surface of the tire 4, the bent portions 17 will come into contact with the outer surface of the tire 4, thereby preventing damage to the tire 4.

[0054] As described above, in this embodiment, in accordance with claim 5, the pulling means is the chain block 5, and the hoisting chain 43 of this chain block 5 can be connected to and disconnected from the U-shaped metal fitting 31, which serves as the connection receiving portion for the pulling means, so that the attachment body 2 can be easily pulled using the chain block 5. [Example]

[0055] FIG. 8 shows a second embodiment of the present invention, in which the same parts as those in the first embodiment are given the same reference numerals, and their explanation will be omitted.

[0056] In this example, when the hoisting length of the chain 43 of the chain block 5 is insufficient due to the size of the tire 4A or the like, a wire rope 66 is used as an extension member, one end of which is connected to the U-shaped metal fitting 31 of the attachment body 2 by a shackle 51, and the other end of which is connected to the hook 45 of the chain block 5. Note that both ends of the wire rope 66 are provided with connecting loops (not shown).

[0057] 8 is a rear wheel of a snowplow or the like, and a cover 71 is attached to the upper part of the tire 4A as a cover fixed to the vehicle body. As in the first embodiment, the left and right tires 4A are jacked up to allow the left and right tires 4A to rotate, and in this state, the tire chains 3 are attached as in the first embodiment.

[0058] In this way, this embodiment provides the same functions and effects as the above-mentioned embodiment 1 in accordance with the respective claims, and further, in claim 3, if the length of the hoisting chain 43 is insufficient, a loop portion at one end of a wire rope 66 or the like serving as an extension member can be connected to the hook 45 of the hoisting chain 43, and the loop portion at the other end of this wire rope 66 can be configured to be connectable to and disconnectable from the U-shaped metal fitting 31 serving as the tension connection receiving portion by a shackle 51 or the like.

[0059] 4 or 8, the chain 43 of the chain block 5 or the wire rope 66 serving as a linear tensile member connected to the chain 43 is pulled diagonally downward, so the attachment body 2 can be used even on vehicles that have a cover 71 above the tire 4. In addition, although the angle θ of the chain 43 serving as a linear tensile member with respect to the horizontal is 45 degrees in FIG. 8, it is preferable to set this angle θ to 30 degrees or more, or even 45 degrees or more, since the cover 71 is less likely to get in the way. [Example]

[0060] 9 and 11 show a third embodiment of the present invention, in which the same parts as those in the above-described embodiments are given the same reference numerals, and their explanation will be omitted.

[0061] The tire chain attachment device 1 of this example includes a covering member 80 having a band-shaped body 81 that covers the outer periphery 4G of the tire 4. The width of the belt-shaped body 81 is approximately the same as the width of the tire 4 or, as shown in FIG. 10, slightly narrower than the width of the tire 4, and the length of the belt-shaped body 81 is approximately equal to the outer periphery of the tire 4. The belt-shaped body 81 is made of a rubber belt or the like that is reinforced with elastic and tough fibers, and has a thickness of, for example, about 3 mm.

[0062] 11, one end 82 and the other end 82T of the band-shaped body 81 are connected by a connecting member 84 with their end faces butted together. The connecting member 84 in this example includes left and right connecting plates 85, 85 made of a hard material such as metal, which are overlapped on the left and right sides of the outer surface of the band-shaped body 81 and straddle the one end 82 and the other end 82T. Note that although the connecting plate 85 is shown in FIG. 11 to be thinner than the band-shaped body 81, it may be about 3 mm thick and about 30 mm in front-to-back and left-to-right width, like the band-shaped body 81. Note that the one end 82 and the other end 82T of the band-shaped body 81 may be connected by the connecting member 84 with their end faces close to each other, or the one end 82 and the other end 82T of the band-shaped body 81 may be connected by the connecting member 84 with their ends overlapping each other.

[0063] In addition, outer through holes 87, 87 for inserting stainless steel one-end bolts 86 and other-end bolts 86T are drilled at one end and the other end of the connecting plate 85, and inner through holes 87A, 87A are drilled at one end 82 and the other end 82T of the strip 81 corresponding to these outer through holes 87, 87.

[0064] Then, one strip 81 is wound around the outer periphery 4G of the tire 4, and one end bolt 86 and another end bolt 86T are inserted from the inner surface through-holes 87A of one end 82 and another end 82T of the strip 81, respectively, so that the end faces of the one end 82 and another end 82T are butted together. A connecting plate 85 is then placed over the outer surfaces of the one end 82 and another end 82T, spanning these surfaces. At this time, bolts 86, 86 are inserted through the outer through-holes 87, 87, and one end nut 88 and another end nut 8T are screwed onto the tip of the one end bolt 86 and the tip of the other end bolt 86T protruding from the connecting plate 85, thereby connecting the one end 82 and another end 82T of the strip 81. The connecting member 84 is thus composed of the connecting plate 85, the bolts 86, 86T, and the nuts 88, 88T.

[0065] With the band-shaped body 81 of the covering member 80 wrapped around the tire 4 in this manner, when the tire chain 3 is pulled by the mounting device main body 2 and wound around the tire 4 as described above, the grooves on the outer periphery 4G of the tire 4 are hidden by the band-shaped body 81, eliminating any unevenness, making it easier to move the mounting device main body 2 along the outer periphery of the tire 4, and in combination with the action of the rolling members 21, 18, the mounting device main body 2 can be pulled smoothly.

[0066] Furthermore, since the band-shaped body 81 is attached to the 4G of the tire 4 by the tire chain 3, after the tire chain 3 is attached, the connecting member 84 may be removed and the snowplow may be driven, or the connecting member 84 may be left attached and the snowplow may be driven.

[0067] In addition, since the band-shaped body 81 covers the unevenness of the outer circumference 4G of the tire 4, the road surface is less likely to be damaged, and since the tire chain 3 does not directly contact the 4G of the tire 4, the tire 4 is less likely to be damaged even when driving with the tire chain 3 attached.

[0068] In this way, this embodiment corresponds to each claim and provides the same functions and effects as the above-described embodiments.

[0069] Thus, in this embodiment, corresponding to claim 6, the tire chain mounting device 1 described in any one of claims 2 to 5 is provided with a covering member 80, which is elastic and includes a band-shaped body 81 that is wrapped around the outer circumference 4G of the tire 4, and a connecting member 84 that connects one end 82 and the other end 82T of the band-shaped body 81 wrapped around the outer circumference 4G of the tire 4.Therefore, when the band-shaped body 81 is wrapped around the tire 4 and the one end 82 and the other end 82T are connected by the connecting member 84 to attach the band-shaped body 81 to the tire 4, when the mounting device main body 2 pulls and wraps the tire chain 3, the grooves on the outer circumference 4G of the tire 4 are hidden by the band-shaped body 81, eliminating any unevenness, making it easier to move the mounting device main body 2 along the outer circumference of the tire 4. In addition, since the band-shaped body 81 covers the unevenness of the grooves of the tire 4, the road surface is less likely to be damaged, and since the tire chain 3 does not directly contact the outer periphery 4G of the tire 4, the tire 4 is less likely to be damaged even when driving with the tire chain 3 attached.

[0070] In this embodiment, the connecting member 84 is arranged on the outer surface of the band-shaped body 81 across one end 82 and the other end 82T of the band-shaped body 81, and includes a connecting plate 85 made of a hard material, a one-end bolt 86 inserted through an outer through-hole 87 drilled on one end of the connecting plate 85 and an inner through-hole 87A drilled in one end 82 of the band-shaped body 81, and a other-end bolt 86 inserted through an outer through-hole 87 drilled on the other end of the connecting plate 85 and an inner through-hole 87A drilled in the other end 87T of the band-shaped body 81. The connecting plate 85 is provided with a bolt 86T, a one-end nut 88 that is threaded onto the tip of the one-end bolt 86 and the tip of the other-end bolt 86T that are inserted into the inner through hole 87A and the outer through hole 87 from the inside of the band-shaped body 81, and the connecting strength between the one end 82 and the other end 82A of the elastic band-shaped body 81 can be ensured, and the one end 82 and the other end 82A can be easily connected using the bolts 86, 86T and the nuts 88, 88T.

[0071] The present invention is not limited to the present embodiment, and various modifications are possible within the scope of the present invention. For example, while a chain block is used as the pulling means in the embodiment, other pulling means such as a winch can be used in the embodiments other than claim 3. Furthermore, bearings may be provided on both the left and right sides of the rolling member, and the rolling member may be rotatably mounted between the left and right vertical rods using these left and right bearings. Furthermore, bearings may be provided at the distal ends of the left and right rear horizontal rods, respectively, and the rear rolling member may be rotatably mounted using these bearings. The connecting receiving portion may be other than the U-shaped one shown in the embodiment, and may be hook-shaped, for example. Furthermore, in claim 6, various connecting members may be used as long as they can connect one end and the other end of the cover. For example, a connecting member having a structure in which one end and the other end are partially overlapped, a bolt is inserted into the overlapping portion, and a nut is screwed onto the bolt may be used. [Explanation of symbols]

[0072] 1 Tire chain attachment tool 2. Attachment body 3 Tire chains 4,4A tires 4G outer circumference 5 Chain block (tensioning means) 7R Right Side Chain 7L Left Side Chain 8,8A Cross Chain 11L left vertical rod 11R Right vertical rod 14 Front transverse rod 15 Posterior transverse rod 15L Rear horizontal rod left 15R Rear side rod right side 15S tip 16 Vertical rod leg 17 Bend 18 Rear rolling member 21 Central rolling member 31 U-shaped metal fitting (connection receiving part for tension means) 32R U-shaped bracket (right side connection receiving part) 32L U-shaped bracket (left side connection receiver) 43 Hoisting chain 51 Shackle (cable connector) 80 Covering member 81 Band 82 One end 82T other end 84 Connecting member 85 Connecting plate 86 One end bolt 86T Other end bolt 87 Outer hole 87A Inner through hole 88 One end nut 88T Other end nut W1 Inner spacing W Inner spacing

Claims

1. A tire chain attaching tool attaches a tire chain to a tire by pulling the tire chain, which includes a pair of right and left side chains and a cross chain provided between the right and left side chains, along the outer circumference of the tire with the attaching tool body. A tire chain mounting device characterized by having a right-side connection receiving portion on the right side of the mounting device main body to which one end of the right side chain can be connected, a left-side connection receiving portion on the left side of the mounting device main body to which one end of the left side chain can be connected, and a tensioning means connection receiving portion on the left-right center of the mounting device main body to which a tensioning means can be connected.

2. The direction intersecting the left-right direction of the wearing device main body is the front-rear direction, the tension means connection receiving portion is provided on the front side of the mounting device main body, and the right connection receiving portion and the left connection receiving portion are provided on the rear side of the mounting device main body, 2. The tire chain mounting device according to claim 1, wherein the mounting device main body is provided with a rear rolling member in the left-right direction between the right connecting receiving portion and the left connecting receiving portion, the rear rolling member rolling on the outer circumference of the tire.

3. The wearing device main body includes left and right vertical rods arranged on the left and right in the front-rear direction, a front horizontal rod in the left-right direction connecting the front sides of the left and right vertical rods; a rear horizontal rod in the left-right direction provided on the rear side between the left and right vertical rods; Equipped with The rear horizontal rod includes a rear horizontal rod left portion and a rear horizontal rod right portion whose base ends are fixed to the left and right vertical rods, and the cylindrical rear rolling member whose tip ends are rotatably inserted into the left and right ends of the rear horizontal rod left portion and the rear horizontal rod right portion, The tension means connection receiving portion is provided to protrude forward from the center of the front horizontal rod in the left-right direction, The right and left connection receiving portions are provided on the right and left rear horizontal rod portions, respectively, so as to protrude rearward; an inner distance between the right connecting receiving portion and the left connecting receiving portion is wider than a width of the tire; a central rolling member in the left-right direction that rolls on an outer periphery of the tire is provided between the front lateral rod and the rear lateral rod, the outer peripheries of the front cross rod, the central rolling member, and the rear rolling member are cylindrical; the central rolling member is provided between the left and right vertical rods so as to be rotatable about the central axis in the left-right direction, the rear rolling member is provided between the right connection receiving portion and the left connection receiving portion so as to be rotatable about the central axis in the left-right direction, and the position of the rear rolling member in the left-right direction is restricted by the right connection receiving portion and the left connection receiving portion, 3. The tire chain mounting tool according to claim 2, wherein the outer diameter of the rear rolling member is larger than the outer diameter of the central rolling member.

4. The wearing device main body includes left and right vertical rods arranged on the left and right in the front-rear direction, a front horizontal rod in the left-right direction connecting the front sides of the left and right vertical rods; a rear horizontal rod in the left-right direction provided on the rear side between the left and right vertical rods; Equipped with The tension means connection receiving portion is provided to protrude forward from the center of the front horizontal rod in the left-right direction, The right and left connection receiving portions are provided on the right and left sides of the rear horizontal rod so as to protrude rearward, and rear ends of the right and left connection receiving portions are located forward of rear ends of the left and right vertical rods, Left and right vertical rod leg portions are provided on the rear sides of the left and right vertical rods, protruding rearward from the position of the rear horizontal rod, and the inner distance between these left and right vertical rod leg portions is wider than the width of the tire, 3. The tire chain mounting tool according to claim 2, wherein the left and right vertical rod legs are provided at their rear sides with bent portions that widen the left-right spacing toward their rear ends.

5. 3. The tire chain mounting tool according to claim 2, wherein the tensioning means is a chain block, and a hoisting chain of the chain block can be connected to and disconnected from the tensioning means connection receiving portion.

6. The tire chain mounting tool according to any one of claims 2 to 5, A covering member is provided, The covering member is an elastic band-shaped member that is wound around the outer periphery of the tire; a connecting member that connects one end and the other end of the band-shaped body wound around the outer periphery of the tire; A tire chain attachment device comprising:

7. The connecting member is a connecting plate made of a hard material and arranged on the outer surface side of the band-shaped body, spanning one end and the other end of the band-shaped body; a first end bolt inserted through an outer through hole formed on one end side of the connecting plate and an inner through hole formed on the first end of the band-shaped body; an outer through-hole formed on the other end side of the connecting plate and an inner through-hole formed on the other end of the band-shaped body; and a first end nut and an second end nut threadedly engaged with the tip of the first end bolt and the tip of the second end bolt inserted from the inner surface side of the band-shaped body into the inner through hole and the outer through hole; 7. The tire chain mounting tool according to claim 6, further comprising:

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