JP4690493B1 - Tire change assist device - Google Patents

Abstract

[PROBLEMS] To perform tire replacement work (especially mounting work) that needs to be performed regularly every year easily, surely, safely, and in a short time without lifting a tire in a middle waist posture even by a weak person. An auxiliary exchange device is provided.
A base having a wheel projecting above a frame at the four corners of a rectangular frame formed by a connecting member that connects the groove member and the groove member, and a bar-shaped member. A mounting table with wheels protruding above the frame body at the four corners of the rectangular frame and outward of the long side of the frame, and a space adjusting means for supporting the tire on the mounting table. A pair of rotatable rollers, which can be separated and arranged in parallel, are installed, and a wheel installed on the mounting table rolls in a groove portion of the groove member of the base, so that the mounting table moves inside the base. It is characterized by being installed movably.
[Selection] Figure 1

Description

  The present invention relates to a tire replacement assisting device for assisting tire replacement work (particularly, tire mounting work) of an automobile or the like.

  In the conventional tire replacement method, a jack is placed under the vehicle body, the jack is operated to raise the vehicle body to a required height, the wheel nut is removed from the hub bolt, and the tire is removed from the vehicle body. Then, lift the replacement tire by hand, pass the hub bolt on the axle side through the bolt insertion hole of the tire wheel, temporarily tighten the wheel nut, operate the jack to lower the vehicle body, tighten the wheel nut, and finish the tire replacement work .

  To install the replacement tire, manually lift the tire from the center of the tire to the center of the tire mounting part of the car body, rotate the tire so that the bolt insertion hole of the tire wheel matches the hub bolt, and maintain the aligned state. It is necessary to move the tire in the direction of the tire mounting portion of the vehicle body.

  When a car becomes a class such as a medium-sized car, a wagon car, or an RV car, the size of the tire becomes larger and heavier, and in recent years, wide tires have become widespread and become heavier. It became work.

  In snowy countries such as Hokkaido, Tohoku, and Hokuriku, it is essential to change tires from normal tires to snow tires before entering the winter season, and from the tires to normal tires after the winter season.

  As described above, it is difficult for a powerless person with a low back posture, and it is difficult to perform tire replacement work (especially mounting work) that must be performed regularly every year without lifting the tire by hand, even for powerless persons. Various tire replacement assistance devices for performing in a short time are disclosed.

  In general, a tire replacement auxiliary device as a conventional example has wheels installed on the lower surface of a base, and a pair of rotatable rollers arranged in parallel on the upper surface of the base. It can be approached and separated. The tire replacement operation (mounting operation) is to support the tire vertically on the roller of the tire replacement assisting device, move the tire replacement assisting device so as to coincide with the tire mounting position parallel to the side surface of the vehicle body, and to the hub bolt by the distance adjusting means Raise and lower the tire so that the bolt insertion holes on the tire wheel match, and rotate the tire so that the rotation position of the hub bolt and the bolt insertion hole on the tire wheel match. The tire wheel is fitted with a bolt insertion hole, a wheel nut is fastened to the hub bolt, and the tire is attached to the vehicle body.

  The tire attachment / detachment assisting device of Patent Document 1 is different from the general conventional example in that it has a U-shape in which two rollers are coupled by only one connecting screw, and the connecting screw is removed. Is divided into two parts to form an L-shaped structure, which is further folded into a rod shape for easy storage.

  Further, the tire changer of Patent Document 2 is different from the general conventional example in that the tires are vertically moved up and down by moving the two rollers closer to and away from each other at the same time by the distance adjusting means.

  Further, the portable tire replacement assisting device of Patent Document 3 is different from the general conventional example in that the main body divided into left and right is divided into one of a plurality of frames whose interior is fixed to the main body. It is inserted into the other frame and the two main bodies are joined together.

  The tire replacement auxiliary device as a general conventional example is unstable because the wheel is installed on the lower surface of the base and the jack-up height of the vehicle body is increased, thereby increasing the inclination of the vehicle body. Further, the movement of the tire to the tire mounting position parallel to the side surface of the vehicle body also moves the entire tire replacement assisting device, and fine adjustment is difficult.

  Further, in Patent Document 1, in addition to the drawbacks of the general prior art, in order to raise a large tire by using a U-shaped shape in which two rollers are connected by only one connecting screw, In order to perform the separation and separation of the roller spacing only in the case, the strength is weak and there is a high possibility of causing trouble.

  Further, Patent Document 2 has the same drawbacks as the general conventional example.

  Further, in Patent Document 3, in addition to the drawbacks of the general prior art, a structure in which one frame is inserted into the other frame, a smooth operation cannot be stably expected due to deterioration over time.

Noto 3097976 Noto 311528 publication Japanese Utility Model Publication No. 7-33706

  This tire replacement auxiliary device allows tireless people to perform tire replacement work (especially tire installation work) without lifting the tire by hand, and by reducing the jack-up height of the vehicle body for tire replacement work. By suppressing the inclination of the vehicle body to a small degree, the stability of the vehicle body is increased and safe work can be realized. Further, the tire is lifted up and down (adjustment of the vertical position of the tire) so that the bolt insertion hole of the tire wheel coincides with the vehicle body hub bolt, and moved so as to coincide with the tire mounting position parallel to the vehicle body side (adjustment of the horizontal position of the tire) A tire replacement auxiliary device with a strong structure that can easily adjust the rotation position of the bolt insertion hole of the tire wheel (adjusting the tire angle) and finely adjust it, and can handle large tires. Is intended to provide.

In order to achieve the above object, at the four corners of a frame formed in a rectangular shape by opposing groove members having concave grooves formed on a bar-shaped upper surface and a connecting member connecting the opposed groove members, the frame is moved upward. And, the wheel installation member protrudes outward of the frame body, the base on which the wheel is installed on the lower surface of the wheel installation member, and above the frame body at the four corners of the frame body formed into a rectangular shape by the rod-shaped member, And a wheel installation frame protrudes outward from the long side portion of the frame body, and a pair of wheels on which the wheel is installed in the wheel installation frame, and a pair of tire tread surfaces supported between the long side portions of the mounting table The rotatable rollers are provided in parallel, and one of the pair of rollers is installed so as to be close to and away from the other roller by the distance adjusting means, and the groove of the groove member of the base is mounted on the mounting table. The frame that constitutes the mounting table within the frame that constitutes the base so that the wheels installed on the base roll. By installing, in a state where the table can move in the base which is formed by a frame body, and further established a mounting table on the base, the upper surface of the two frames forming the base and the mounting table It is characterized by the same height from the ground surface .

Further, one of a pair of parallelly arranged rollers that support the tread surface of the tire on the mounting table can be detachably installed at a plurality of predetermined positions on the long side portion of the frame constituting the mounting table. What was featured.

  Since it is not necessary to support the tire replacement work with both hands while leaning forward, it has become possible for less powerful people to perform in a short time. In addition, the height of the frame body can be reduced by installing the moving wheels above and outside the frame body constituting the base and the mounting table, and the vehicle body for tire replacement can be reduced. By reducing the jack-up height and reducing the tilt of the vehicle body, the stability of the vehicle body can be increased, safe tire replacement work can be performed, and the wheel diameter of the wheel installed on the base can be increased. The tire replacement auxiliary device can move with extremely light force.

  In addition, since the mounting table can roll on the base, an operation for adjusting the tire mounting position parallel to the side surface of the vehicle body (adjustment of the horizontal position of the tire) can be easily performed with a light force capable of fine adjustment. As with the conventional example, the tire is lifted and lowered (adjustment of the vertical position of the tire) and the rotation position of the bolt insertion hole of the tire bolt and the tire wheel is adjusted so that the bolt insertion hole of the tire wheel coincides with the vehicle body hub bolt. Easy to do.

  Furthermore, since one of the rollers can be movably moved so as to be adapted to each size of the tire, the amount of operation for lifting and lowering the tire can be reduced, thereby shortening the working time.

  Moreover, since the structure is a solid frame formed in a rectangular shape, there is no occurrence of rattling, distortion, etc., and it can be used stably for a long period of time without causing any trouble in large tires.

It is a perspective view showing the tire exchange auxiliary device of a 1st embodiment. It is a perspective view which shows the tire replacement assistance apparatus of 2nd Embodiment. It is a perspective view which shows the structure of the principal part of the tire replacement auxiliary device of 1st Embodiment. It is AA sectional drawing of the tire exchange auxiliary device of a 1st embodiment. It is a BB sectional view of the tire exchange auxiliary device of a 1st embodiment. It is a front view of the tire exchange auxiliary device of a 1st embodiment showing the state where the tire was laid.

  Embodiments of the present invention will be described in detail with reference to the drawings. For replacing the front wheel tire on the driver's seat using the tire replacement assist device, the tire replacement assist device has an adjustment roller and a roller adjustment mechanism on the right side, and a fixed roller on the left side. In a state of being installed in parallel with each other, a frame body portion parallel to the vehicle body side surface of the base and the mounting table is a long side portion, and a portion perpendicular to the vehicle body side surface is a short side portion. Further, the vehicle body side of the long side portion is a rear portion, and the opposing worker side is a front portion. The tire replacement auxiliary device has a front-rear symmetrical structure.

  As shown in FIG. 3, the tire replacement auxiliary device includes a base 1, a mounting table 2, an adjustment roller 3, a roller adjustment mechanism 4, and a fixed roller 5.

The tire replacement auxiliary device of the first embodiment will be described in detail with reference to FIGS. A frame body is formed in a rectangular shape by an opposing groove member 11 in which a concave groove portion 12 is formed on a square bar-like upper surface and a square bar-like connecting member 13 that connects the opposing groove members 11. The frame body has a long side portion on the groove member 11 side and a short side portion on the connecting member 13 side. At the four corners of the frame body, an inverted L-shaped wheel installation member 14 protrudes upward from the frame body and outward from the long side portion of the frame body, and the direction can be freely changed on the lower surface of the wheel installation member 14. A possible caster 15 is installed, and a handle 16 for moving the base 1 is installed on the outer surface of the groove member 11 to form the base 1.

A rectangular frame is formed by the opposing mounting member 21 in the form of a square bar and the mounting connection member 22 in the form of a square bar that connects the opposing mounting member 21. At the four corners of the frame body, a gate-type wheel installation frame 23 protrudes above the frame body and outward of the long side of the frame body, and the wheels 24 are installed in the frame of the wheel installation frame 23 and mounted. The mounting table 2 is formed.

The mounting table 2 is installed in the base 1 by appropriately shortening the long side of the mounting table 2 compared to the long side of the base 1, and the groove 12 of the groove member 11 of the base 1 is mounted on the mounting table 2. As the wheel 24 rolls, the mounting table 2 can move right and left lightly on the long side portion of the base 1.

Due to the installation structure of the universal caster 15 of the base 1 and the wheel 24 of the mounting table 2, the height of the upper surface of the groove member 11 of the base 1 and the mounting member 21 of the mounting table 2 from the ground is extremely reduced. It becomes possible. Moreover, since the wheel diameter of the universal caster 15 can be increased, the movement of the tire replacement auxiliary device on the ground surface can be easily performed with a light force.
It is assumed that the height of the upper surface of the groove member 11 of the base 1 and the mounting member 21 of the mounting table 2 from the ground is the same.

A pair of rotatable rollers that support the tread surface of the tire 6 are disposed in parallel on the mounting members 21 and 21 of the mounting table 2. One roller is loosely fitted to a rod-like fixed roller shaft 51 so that the columnar fixed roller 5 is rotatable and slidable in the axial direction of the fixed roller shaft 51, and both ends of the fixed roller shaft 51 are square. A plate-like object is provided in a columnar shape on the left side, and is supported by a fixed roller bearing 52 in which a fixing bolt 53 is loosely fitted in the center of the plate-like object (see FIGS. 5 and 6).

The fixed roller bearing 52 is fitted into a plurality of fixed roller mounting recesses 25 formed in the upper surface on the left side of the mounting member 21 of the mounting table 2, and is further screwed into the screw hole 26 by a fixing bolt 53. The fixed roller 5 installed as described above can easily move the installation position.

The other roller paired with the fixed roller 5 is loosely fitted to a rod-shaped adjustment roller shaft 31 similar to the fixed roller 5 so that the columnar adjustment roller 3 can rotate and slide in the axial direction of the adjustment roller shaft 31. Further, both ends of the adjustment roller shaft 31 are formed in a quadrangular prism shape, and the lower portion slidably holds the mounting member 21, and the feed screw shaft 43 is formed in a cylindrical shape on the right side and formed with a thread groove. The end is pivotally supported by an adjustment roller bearing 32 having a fixed end. The adjustment roller bearing 32 has a quadrangular shape and the lower portion slidably holds the mounting member 21, so that the adjustment roller bearing can be used even when an impact is applied when the tire 6 is placed on the adjustment roller 3. 32 does not come off the mounting member 21 (see FIG. 4).

By making the lengths of the adjustment roller 3 and the fixed roller 5 shorter than those of the adjustment roller shaft 31 and the fixed roller shaft 51, the adjustment roller 3 and the fixed roller 5 move back and forth on the adjustment roller shaft 31 and the fixed roller shaft 51. It becomes possible.

In the roller adjustment mechanism 4, an operation handle 45 protrudes from the right side of the gear mechanism 42 installed at the center of the right mounting coupling member 22, and the rotation of the operation handle 45 is performed by the gear mechanism 42. , 44 and further to the feed screw shafts 43, 43 by the gear mechanisms 41, 41. The feed screw shaft 43 penetrates the gear mechanism 41 and extends to the right side of the gear mechanism 41, and meshes with the gear of the gear mechanism 41.

The feed screw shafts 43, 43 are fixed by rotating the operation handle 45 of the roller adjusting mechanism 4, and the ends of the feed screw shafts 43, 43 are fixed by the advancement and retraction of the right extension portion of the gear mechanisms 41, 41. The adjustment roller bearings 32 and 32 slide on the mounting members 21 and 21. By the sliding of the adjusting roller bearings 32, 32, the distance between the fixed roller 5 and the adjusting roller 3 can be arbitrarily changed. Furthermore, since the roller adjustment mechanism 4 slides simultaneously at the same distance on both ends of the adjustment roller shaft 31, the adjustment roller 3 can smoothly slide in parallel with the fixed roller 5 without rattling. The gear mechanisms 41 and 42 are not particularly limited as long as they have the above functions.

Next, a tire changing method using the tire changing auxiliary device of the first embodiment will be described. Tire replacement work includes tire removal work and tire attachment work, but it is not necessary to lift the tire for tire removal work, so there is no need to use equipment such as a tire replacement auxiliary device even for large tires. As for the transportation and movement of the tire, the tire can be moved easily by standing vertically with the tread surface of the tire in contact with the ground surface and rolling the tire. As described above, only the tire mounting operation is described in the present apparatus. The tire can be removed and transported using this device.

When the tire 6 is attached using this apparatus, the operation of moving the central axis of the attached tire 6 up and down is adjusted for the vertical position of the tire, and the operation of moving the attached tire 6 is adjusted for the horizontal position of the tire. The operation for adjusting the rotational position of the hub bolt and the wheel bolt insertion hole 61 is referred to as the tire angle adjustment, and the operation for pushing the tire 6 into the vehicle body is referred to as the tire insertion operation.

An example of tire replacement (mounting) on the front wheel on the driver's side will be described. First, the vehicle body is jacked up at a predetermined position behind the front wheels, the wheel nuts are removed from the hub bolts, and the tire 6 is removed, and then on the adjustment roller 3 and the fixed roller 5 of the tire replacement auxiliary device in the vicinity of the tire replacement position. The tire 6 is placed vertically so that the tread surface of the tire 6 is in contact, and the handle 16 is operated to move the tire replacement assisting device to a rough position parallel to the tire mounting position on the side surface of the vehicle body. At this time, by increasing the ring diameter of the ground caster 15 which is grounded to the base 1, it can be easily moved with a light force, and the direction can be easily changed by using the free caster. Thereafter, since the wheel 24 of the mounting table 2 is mounted on the groove portion 12 of the groove member 11 of the base 1, the mounting table 2 is moved to the left and right to align the tire 6 with the mounting position of the tire (the level of the tire). Positioning). At this time, the wheel 24 of the mounting table 2 can be easily adjusted with a light force by rolling the groove portion 12 of the base 1 to the left and right, so that fine adjustment is possible.

Next, when the operating handle 45 of the roller adjusting mechanism 4 is operated (rotated), the adjusting roller 3 slides on the mounting member 21, and the adjusting roller 3 and the fixed roller 5 approach and separate from each other. 4 is raised and lowered. Thereby, the vertical position adjustment of the tire 6 can be performed freely. In order to pull out the tire replacement assisting device from the vehicle body after the tire replacement operation, the tire 6 needs to be raised higher than the upper surfaces of the long sides of the frame bodies of the base 1 and the mounting table 2. By reducing the height of the jack, the jack-up height can be kept low. Further, since the position of the operation handle 45 is the front wheel front side opposite to the position where the vehicle body is jacked up, there is a sufficient space for operation and the operation handle 45 can be operated with a margin. Although the jack-up position of the vehicle body changes depending on the position of the tire to be replaced, the tire replacement auxiliary device has a symmetrical shape in the front-rear part, so that the operation handle 45 can be operated with sufficient margin even if it is reversed and used. Is possible.

Next, since the adjustment roller 3 and the fixed roller 5 are rotated, the tire angle is adjusted while aligning the rotation positions of the hub bolt and the tire wheel bolt insertion hole 61 while turning the tire 6 lightly by hand.

When the tire horizontal position adjustment, the tire vertical position adjustment, and the tire angle adjustment are repeated, the tire 6 is pushed into the vehicle body with the hub bolts and the bolt insertion holes 61 of the tire wheels being completely aligned ( The rollers 3 and 5 are previously brought into contact with the groove member 11 on the front side of the base 1), the rollers 3 and 5 are moved from the front side to the rear side of the tire replacement auxiliary device, and the tire Hub bolts are fitted into the wheel bolt insertion holes 61 (tire insertion operation). Then attach the wheel nut to the hub bolt and tighten it temporarily.

Then, the operation handle 45 is rotated in a direction in which the adjustment roller 3 and the fixed roller 5 are separated from each other to widen the interval, thereby disconnecting the tire 6 from the adjustment roller 3 and the fixed roller 5, and pulling out the base 1 from under the vehicle body. Thereafter, the jack is lowered and the wheel nut is fully tightened to complete the tire replacement work.

Further, since the fixed roller 5 can be easily movably installed at an appropriate position of the plurality of fixed roller mounting recesses 25 of the mounting member 21, the distance between the fixed roller 5 and the adjustment roller 3 that is optimal for the size of the tire to be replaced can be obtained. By being able to select, the amount of operation of the operation handle 45 of the roller adjustment mechanism 4 can be reduced, and the working time can be shortened.

  FIG. 2 shows a tire replacement auxiliary device according to the second embodiment. The difference from the tire replacement auxiliary device of the first embodiment is that the installation position of the universal caster 18 installed on the base 1 is installed outside the short side and the operation handle of the roller adjustment mechanism 4. 47 and 47 are respectively installed on the front and rear side of the mounting table 2.

  The tire replacement auxiliary device of the second embodiment is longer on the long side portion and shorter on the short side portion than the tire replacement auxiliary device of the first embodiment. Depending on the vehicle type, it can be selected whether the tire replacement assistance device of the first embodiment is good or the tire replacement assistance device of the second embodiment is good. Further, since the operation handles 47, 47 of the tire replacement assistance device of the second embodiment are installed at the front and rear portions, all the operations of the tire replacement assistance device can be performed on the front side.

Tire replacement work (especially tire mounting) using this tire replacement auxiliary device can be performed easily even by a powerless person without the heavy load work of lifting the tire by hand. Since the jack-up height can be lowered, the leaning of the vehicle body can be reduced, and the stability of the vehicle body during work can be increased and safe work can be performed. Furthermore, the positioning of the hub bolt and the tire wheel bolt insertion hole can be finely adjusted for the horizontal position adjustment of the tire, the vertical position adjustment of the tire and the angle adjustment of the tire, respectively, so that the tire can be easily replaced in a short time. .

Further, the tire replacement auxiliary device has a simple structure, has a small number of components, is small and light, and can be manufactured into a strong structure, so that it can operate stably and reliably over a long period of time.

DESCRIPTION OF SYMBOLS 1 Base 2 Mounting base 3 Adjustment roller 4 Roller adjustment mechanism 5 Fixed roller 6 Tire 11 Groove member 12 Groove part 13 Connection member 15, 18 Swivel caster 21 Mounting member 22 Mounting connection member 24 Wheel 25 Fixed roller attachment recessed part 31 Adjustment roller Shaft 32 Adjustment roller bearing 41, 42 Gear mechanism 43 Feed screw shaft 45, 47 Operation handle 51 Fixed roller shaft 52 Fixed roller bearing

Claims (2)

At the four corners of a rectangular frame formed by opposing groove members having concave grooves formed on a bar-shaped upper surface and a connecting member that connects the opposed groove members, the frame body is moved upward and outward from the frame body. Protruding a wheel installation member, a base on which the wheel is installed on the lower surface of the wheel installation member, and above the frame at the four corners of the frame formed in a rectangular shape by a rod-shaped member, and the long side of the frame A wheel mounting frame protrudes outward, and a mounting table in which the wheel is installed in the wheel mounting frame and a pair of rotatable rollers that support the tread surface of the tire between the long sides of the mounting table are parallel to each other. One of the pair of rollers is installed so that it can be moved toward and away from the other roller by the distance adjusting means, and the wheel installed on the mounting table rolls the groove of the groove member of the base. By installing the frame constituting the mounting table in the frame constituting the base, The platform can be moved in the base formed by the frame, in yet installed state the mounting table to the base, the height of from the ground plane of the upper surface of the two frames forming the base and the mounting table A tire replacement assisting device characterized by the fact that they are the same. One of a pair of parallelly arranged rollers that support the tread surface of the tire on the mounting table can be detachably installed at a plurality of predetermined positions on the long side portion of the frame constituting the mounting table. The tire replacement auxiliary device according to claim 1.