JP2011152821A - Tire exchange device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tire exchange device for stably exchanging a wheel, without pushing up highly a hub of a vehicle. <P>SOLUTION: A column 4 is vertically erected on a base 1 for installing a plurality of casters 6, 6..., and a jack 3 is installed in the vicinity of the column 4, and a lifting base 2 is installed for liftably moving along the column 4. A plurality of rollers 14, 14... rotatable by placing a tire 5 are rotatably installed on a bottom plate 12 of the lifting base 2, and when lowering the lifting base 2, the bottom plate 12 is fitted to a space 9 formed on the base 1, and can approach a floor surface. For further pushing up the lifting base 2, this device is engaged with the jack 3. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a tire changing device for easily exchanging a wheel fitted with a normal tire and a wheel fitted with a snow tire.

  In Kyushu, Okinawa, and the Pacific side where there is little snow, it is possible to drive a car with normal tires installed throughout the year. However, in the Sea of Japan area, Hokkaido area, and Tohoku area, it snows in winter, so it is necessary to change from a normal tire to a snow tire that can run even in a snowy state in winter. For this reason, each household keeps wheels equipped with snow tires and replaces them with snow tires when snow falls.

  When changing from a wheel fitted with a normal tire to a wheel fitted with a snow tire, the tire is replaced while the vehicle is lifted with a jack, but this is a heavy labor. It is relatively easy if it is a small tire, such as a light vehicle, but if it is a large vehicle, especially a four-wheel drive vehicle that has been frequently used in recent years, a large tire is attached to a large wheel. Is very heavy and not easy to lift by hand.

  Such wheel replacement needs to be performed twice a year. In other words, before the snow falls, the wheels with normal tires must be replaced with the wheels with snow tires. Don't be. In addition, the replacement of the wheel is performed not only at the vehicle repair shop but also at the gas station, but there is a certain cost.

  And when it begins to snow, it often overlaps with other people and waits for a long time. For this reason, it is often the case that one's own vehicle is replaced by oneself, but it is a difficult task to lift the large and heavy wheels by hand and align the wheel bolt holes with the hub bolts protruding from the vehicle hub. Become. In this case, the vehicle is raised to a predetermined height by the jack, but the newly attached wheel needs to be lifted by hand and rotated to be aligned with the hub bolt.

  In the case of a Japanese vehicle, a hub bolt protruding from the hub extends, but in the case of a European vehicle, there is no hub bolt, and the hub is merely provided with a bolt hole. For this purpose, it is necessary to lift up a heavy wheel with a large tire by hand and insert a bolt into the bolt hole of the hub, which is a more difficult work. If you are a general amateur, it takes a long time to replace the wheels. In addition, many people hurt their backs because of the burden on their backs because they work from the middle back.

Therefore, various tire change devices (tire changers) have been developed so that such work can be easily performed.
A “tire replacement jack” according to Japanese Patent Application Laid-Open No. 2008-162570 is a tire replacement jack that can be easily replaced by anyone with simple operations and that can be obtained by consumers at a low price. Therefore, rollers are attached to both ends of the roller support plate, and the link of the pantograph jack is separated to the left and right. The pantograph jack is attached between the roller support plate and the base.

Japanese Patent Laid-Open No. 2007-1557 “Tire Replacement Auxiliary Stand” works when an operator holds a tire / wheel assembly, which is a heavy load, for a long time when replacing a tire by aligning a vehicle body bolt and a tire wheel hole. This is to avoid this.
Therefore, two parallel pipes that rotate with the tire mounted on the base plate with casters are installed. When replacing the tire, the tire wheel assembly is placed on the pipe, and the tire body is rotated with the jack while the tire wheel assembly is rotated. Adjust the height, align the wheel holes and bolts, and if they match, push the tire wheel assembly into the car body and insert the bolts through the wheel holes.

A “tire lifting jack device” according to Japanese Utility Model Laid-Open No. 7-995 is a simple mounting device for replacing a spare tire which is a heavy object such as a truck. That is, a lifting part using a simple jack and a set part of a tire are provided on a sliding frame, and the tire can be placed on this set part and easily lifted up and attached to the wheel disk of the truck. .
"Tire replacement jack" according to Japanese Patent Application Laid-Open No. 2008-162570 “Tire Replacement Auxiliary Stand” according to JP 2007-1557 A "Tire lifting jack device" according to Japanese Utility Model Laid-Open No. 7-995

  As described above, various forms are known for the tire change device, and the wheel is lifted to the height of the hub of the vehicle to which the wheel is attached, and the wheel is rotated at the height position to be aligned with the bolt. Can do. However, there is a risk that the wheels may fall when they are lifted or rotated and aligned. On the other hand, in the case of the conventional tire changing device, the height of the wheel to be placed becomes high, and as a result, it is necessary to raise the vehicle high with a jack. The jack provided as an accessory in the vehicle is generally small, and it is dangerous to lift the vehicle high using the small jack. The problem to be solved by the present invention is this problem, and the wheel moves from a predetermined place without falling down, and can be safely mounted on the hub of the vehicle raised to the minimum without falling down. A tire changing device is provided.

  The tire changing device according to the present invention has a substantially U-shaped or quadrangular base to which a plurality of casters can be attached and moved, a jack is attached to the base, and a column is mounted from the base. Stands vertically. A lifting platform is attached along the column so as to be movable up and down, and the lifting platform is connected so that it can be moved up and down by operating the jack.

A plurality of rollers are rotatably attached to the bottom plate of the lifting platform. These rollers can be mounted and rotated so that the outer circumference of the tire does not come into contact with the bottom plate of the lifting platform even when tires of any size are placed. Installed. That is, if the distance between the rollers is increased, the mounted tire rotates stably. However, if the distance is too large, the outer periphery of the tire hits the bottom plate in the case of a small tire.

  On the other hand, the upper arm slide bar is attached to the column so as to be movable up and down. The upper arm can hit the upper end of the tire supported on the roller of the bottom plate, and a locking piece extending downward can be formed at the tip of the arm as required. In some cases, a set screw for fixing the slide bar at a predetermined position is attached to the column. In the present invention, when the elevator is lowered, a space for fitting the bottom plate is formed on the base so that the bottom plate on which the tire is placed is close to the floor surface. That is, it is not the structure which has arrange | positioned the baseplate on the base.

  In the tire changing device according to the present invention, if the tire is placed on a roller provided on the bottom plate of the lifting platform and the jack is operated in this state, the wheel can be lifted together with the lifting platform. The wheel mounted on the roller can rotate at this height in accordance with the height of the vehicle's hub that is raised by another jack. When the wheel bolt hole matches the hub bolt, the wheel can be attached to the hub if the base is pushed to the hub side, and then the nut can be tightened to fix it to the hub.

  By the way, the base of the tire changing device of the present invention has a U-shaped or quadrangular frame, and a space of a predetermined size is formed inside, and a bottom plate is fitted in this space. Therefore, if the lifting platform is lowered, the bottom plate can be lowered to a position close to the floor surface, and the height of the wheel placed on the roller of the bottom plate is lowered. Therefore, when attaching the wheel to the hub, it is not necessary to raise the vehicle high, and a minimum height is sufficient. That is, the position may be slightly higher than the wheel attached to another hub and in contact with the ground.

  On the other hand, the upper arm is attached to the support column, and the wheel supported on the bottom plate roller of the lifting platform is stabilized without falling by hitting the upper end of the outer periphery of the tire. Moreover, it does not get in the way when rotating the wheel. And it can also carry to the vicinity of a vehicle hub, without putting a wheel on a lifting platform in another place, and falling down. Since the bottom plate fits into the base space and is in a position close to the floor surface, the height of the wheel mounted on the roller is low and the stability is good.

The front view of the tire exchange apparatus which concerns on this invention. The rear view of the tire exchange device concerning the present invention. The side view of the tire replacement apparatus which concerns on this invention. The top view of the base which comprises the tire replacement apparatus of this invention.

  1, 2, and 3 show an embodiment of a tire changing apparatus according to the present invention. FIG. 1 is a front view, FIG. 2 is a rear view, and FIG. 3 is a side view. In the figure, 1 is a base, 2 is a lifting platform, 3 is a jack, 4 is a support column, and 5 is a wheel (a tire mounted on a wheel). As shown in the plan view of FIG. 4, the base 1 has a substantially U-shaped shape, and casters 6, 6... Are attached to the bottom surface, so that the base 1 is movable. .

  As is apparent from the plan view of FIG. 4, the base 1 has a U-shape having a base 7 and both side portions 8, 8, and a space 9 is formed between both side portions 8, 8. The casters 6, 6... Are attached to the front ends of the side portions 8, 8 and the center of the base portion 7, and can move the base 1 in a free direction. A support column 4 stands vertically on the base 7 of the base 1, and the support column 4 is formed of a pipe. A slide bar 10 is fitted into the pipe support column 4. The slide bar 10 can slide in the vertical direction, and the height of the upper arm 11 provided on the upper part of the slide bar 10 is adjusted.

  On the other hand, the lifting platform 2 is substantially L-shaped and has a bottom plate 12 and a vertical plate 13, and rollers 14, 14... Are rotatably attached to corner portions of the rectangular bottom plate 12. .. Are fixed to the bottom plate 12, and the rollers 14, 14,... Are pivotally supported by the supports 15, 15,. Of course, these rollers 14, 14... Are arranged in the same direction, and the wheel 5 is placed on the rollers 14, 14.

  As shown in FIGS. 2 and 3, the distance between the left and right rollers 14, 14 is not excessively large so that the wheels 5 mounted on the rollers 14, 14. It is set as the distance which does not touch. However, if the distance is too small, the wheel 5 to be placed will not be stable, so the minimum distance must be set.

  As shown in FIGS. 2 and 3, the wheel 5 is rotatably supported by four rollers 14, 14... Attached to the bottom plate 12 of the lifting platform 2, but the wheel 5 has a small size and a small width. At the same time, the wheel 5 is supported only by the two left and right rollers 14 and 14. For this reason, there is a risk of falling to the front side, and in the tire changing device of the present invention, the upper arm 11 is attached to prevent the wheels 5 from falling. That is, the upper arm 11 can be pressed against the upper end of the outer periphery of the tire of the wheel 5, so that the wheel 5 supported on the two left and right rollers 14 and 14 does not fall down.

  A slide bar 10 extending downward is provided at the base of the upper arm 11, and the slide bar 10 is inserted into the pipe support 4 and moves up and down. Therefore, the weights of the upper arm 11 and the slide rod 10 act on the upper end of the tire of the wheel 5. Of course, when the width of the wheel 5 is large, it is supported by four rollers 14, 14,..., But in this case as well, the upper arm 11 is more stable by placing it on the tire upper end as shown in FIG. To do.

  By the way, the lifting platform 2 is configured to be able to ascend, and a guide 16 is attached to the back side of the vertical plate 13, and the guide 16 is fitted to the column 4 and guided. An L-shaped receiving portion 17 is fixed to the guide 16 and is pushed up by the jack 3 attached to the base portion 7. That is, the upper end of the jack 3 hits the receiving portion 17, and when the height of the jack 3 increases by operating the jack 3, the guide 16 is pushed up, and the lifting platform 2 is raised at the same time.

  Here, the specific form and structure of the jack 3 are not limited, and commercially available ones may be employed. The jack 3 used in this embodiment forms a rhombus shape by four links 18a, 18b, 18c, 18d, and the connecting portion of the links 18c, 19d is fixed to the base 7 as a base 19, and the links 18a, 18b The connecting portion is a push-up portion 20. And the volt | bolt 23 which connects the screw hole formed in the connection part 21 of link 18a, 18c and the connection part 22 of link 18b, 18d is provided. Therefore, if the bolt 23 is rotated, the crossing angle of each link 18a, 18b, 18c, 18d is changed and the push-up portion 20 can move up and down.

  The wheel 5 mounted on the lifting platform 2 is raised by operating the jack 3 to an appropriate height, that is, a height attached to the hub of the vehicle. Bolts protrude from the hub, and the wheel 5 is rotated so that the bolts fit into the bolt holes of the wheel. Since the wheel 5 is mounted on the rollers 14, 14..., The wheel 5 can be freely rotated if the base 1 is moved forward when the bolt hole is aligned with the hub bolt. Mounted.

  When the wheels 5 are exchanged, the vehicle 5 must be pushed up and removed from the wheel 5 in advance. In this case, the vehicle may be pushed up to the minimum necessary height. In the tire changing device of the present invention, the bottom plate 12 of the lifting platform 2 is fitted in the space 9 of the U-shaped base 1. Therefore, if the lifting platform 2 is lowered, the bottom plate 12 can come into contact with the floor surface. For this reason, the height of the wheel 5 mounted on the rollers 14, 14... Attached to the bottom plate 12 is relatively low. Held in position.

  Of course, the outer diameters of the casters 6, 6... Of the base 1 may be increased so as to be easily moved, but the outer diameters of the rollers 14, 14. The base 1 is not limited to the U-shape, and may be configured by a rectangular frame, and the bottom plate 12 may be fitted in the internal space. However, the base plate 12 is positioned on the base 1. Therefore, the height of the wheel 5 mounted on the rollers 14, 14... Is increased, and therefore the hub of the vehicle needs to be pushed up high.

  However, the jack provided as a vehicle accessory is small and it is dangerous to push the hub high. At the same time, the conventional structure in which the wheel 5 is placed at a high position also impairs the stability of the tire changing device itself. The tire changing device of the present invention is characterized not only by improving workability but also by taking into account safety.

DESCRIPTION OF SYMBOLS 1 Base 2 Lifting base 3 Jack 4 Support | pillar 5 Wheel 6 Caster 7 Base 8 Side 9 Space
10 Slide bar
11 Upper arm
12 Bottom plate
13 Vertical plate
14 Laura
15 Support
16 Guide
17 Receiver
18 links
19 units
20 Push-up part
21 Connecting part
22 Connecting part
23 volts

Claims (3)

In a tire changing device used when attaching another wheel to a vehicle hub from which a wheel has been removed, a support is vertically erected on a base on which a plurality of casters are attached, and a jack is attached in the vicinity of the support, and A lifting platform that moves up and down along the column is mounted, and a plurality of rollers that can rotate with tires mounted on the bottom plate of the lifting platform are rotatably mounted. When the lifting platform is lowered, it is formed on the base A tire exchanging device characterized in that a bottom plate can be fitted into the space and can be brought close to the floor surface, and further engaged with the jack to push up the elevator. 2. The tire changer according to claim 1, wherein a slide bar is attached to the support column so as to be movable up and down, and an upper arm that is in contact with an upper end of the tire outer periphery is attached to an upper portion of the slide bar. The above-mentioned lifting platform is an L-shape having a bottom plate and a vertical plate, and a guide that moves up and down along the column is provided on the vertical plate, and a receiving portion that is pushed up by a jack is attached to the guide. 2. The tire change device according to 2.

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