JP6357446B2 - Tire attachment / detachment method - Google Patents

Description

  The present invention relates to a tire attaching / detaching method using a tire attaching / detaching device having a function capable of automatically changing the position and orientation of a tool that directly engages a tire.

  Various types of tire attaching / detaching devices are known, but basically, the wheel is attached to the main shaft and the bead roller can be pressed against the tire side surface and the bead surface while rotating. FIG. 5 shows a specific example of a conventional tire attaching / detaching device. A moving body (B) is attached to a base (A), and a chuck (C) for attaching a wheel to the moving body (B) is vertically oriented. It is attached to the tip of the arm (d) that swings.

In addition, two guide rails (e) and (e) are provided in parallel on the base (a), and a moving platform (f) is fed to the guide rails (e) and (e). And a tool (g) at the tip of the arm on the moving table.
A wheel is fixed to the chuck (c), and the tire mounted on the wheel is pressed from the side by pressing the dish-shaped disc (h) constituting the tool (g) from the side while rotating the tire. Can be removed. Further, the tool (g) has a tire claw (nu) in a pair with a dish-shaped disk (h).

  The dish-shaped disc (h) is arranged at a position close to the flange of the wheel and presses the side surface of the tire. That is, since the tire bead is fixed to the bead portion of the wheel, the tire bead is detached from the wheel by pressing the side surface while rotating the tire, leaving a gap that does not contact the flange. If the tire claw (nu) is locked to the tire bead and the tire rotates, the tire bead is removed from the wheel.

  However, when removing the tire mounted on the wheel, there is a case where it does not come off even when the tire rotating only from one side surface is pressed by the dish-shaped disc (H). That is, it is impossible in a state where the tire beads are fixed to the bead portion of the wheel, and therefore, it is necessary to release the tire beads on both sides from the fixed state. For this purpose, the tire bead must be released by moving the tire tool to the opposite side of the tire.

  FIG. 6 shows a case where the tool (nu) moves over the tire (le) to the opposite side and its direction is reversed. A wheel (e) fitted with a tire (le) is fixed to the chuck (c), and the left bead of the rotating tire (le) in this state is pressed by a dish-shaped disc (chi) of the tool (n). By doing so, the tire bead is released from the wheel bead portion. Then, as shown in (b), the tool (nu) is moved to move to the opposite side of the tire (le), and if the right tire bead is pressed again, it is released.

When both the beads are released from the wheel bead in this way, the tire (le) is removed from the wheel (e) if the dish-shaped disc (h) is pressed against the side of the tire.
By the way, when the tool (nu) is moved from the state shown in FIG. 6 (a) as shown in (b), the moving base (f) on which the tool (nu) is mounted becomes the guide rail (e), (e ) Slide along.

When sliding the moving table (f), care must be taken so that the tool (n) does not collide with the tire (le). And, when moving to the right side of the tire (le), the direction of the tool (nu) must be reversed, which is troublesome.
Incidentally, the “tire attaching / detaching device” according to Japanese Patent Laid-Open No. 2005-53281 and the “tire attaching / detaching device” according to Japanese Patent Laid-Open No. 9-123717 are conventional devices, and various tire attaching / detaching devices are known. And the tool of each of these apparatuses is comprised so that it can move along a guide rail.
"Tire attaching / detaching device" according to JP-A-2005-53281 "Tire attaching / detaching device" according to JP-A-9-123717

  As described above, the conventional tire attaching / detaching device attaches the tool to the moving table that moves along the guide rail, and when attaching / detaching the tire, the tool must be moved to the respective sides with the tire interposed therebetween. Must not. There is a problem that the tool collides with the tire during this movement. The problem to be solved by the present invention is this problem, and a tire attaching / detaching device equipped with a tool reversing mechanism that automatically moves so that the tool does not hit the tire and can change the direction of the tool. A method for attaching and detaching a tire using a tire is provided.

  The tire attaching / detaching device used in the present invention is provided with a moving base in which a chuck for fixing a wheel is attached to an arm tip attached to a moving body, and a tool is attached to the tip of a tool arm that can be expanded and contracted. The base has a guide rail, and the moving body can move on the guide rail, and the moving base can also move on the guide rail provided on the base. Therefore, the basic appearance structure is common to the conventional tire attaching / detaching device.

  The tool is attached to the tip of a tool arm that expands and contracts, and the tool arm can turn upward about a base shaft provided at a base. Therefore, a cylinder is attached to the moving base so that the tool arm turns about the base axis, and the tip of the piston rod of the cylinder is connected to the tool arm. If the piston rod extends, the tool arm falls down and faces the center of the tire, and if the piston rod contracts, the tool arm can turn and rise upward.

  In addition, a sensor is attached to the moving table, and the position of the tire can be detected by a laser beam emitted from the sensor. That is, if the moving platform moves along the guide rail and the tool approaches the tire, the arm turns and rises, and when it moves beyond the tire, it can fall back to its original position. Of course, the sensor also detects that the tire has been crossed. And if it moves to a predetermined position, it is comprised so that the direction of a tool may reverse.

  Here, the sensor is not limited to the case where it is mounted on the moving table side, but can be mounted on the moving body side where the tire is mounted. The first purpose of the sensor is to detect that the tool does not collide with the tire due to the movement of the moving table. The movement of the moving table, the turning of the tool arm upward, the reverse movement of the tool, and the lower of the tool arm. There are no particular restrictions on the procedure for the turning operation.

In the tire attaching / detaching device targeted by the present invention, when a tool is moved along a guide rail, a sensor is provided on a moving table to which the tool is attached, and an area where a tire exists is detected by the sensor. In addition, the tool does not hit the tire.
That is, when the moving table moves and the tool approaches the tire, the arm automatically turns and rises, and the tool can move while avoiding the tire. There is no need for the operator to lift the tool by hand and avoid the tire as in the past.

  Of course, it is also possible to operate the tool arm so that it rises before the moving base starts moving. Then, the tool moved to a predetermined position reverses its direction, the tool arm turns downward and falls down, and the tire can be immediately attached / detached, and the substantial work efficiency is improved.

The top view which shows the tire attachment / detachment apparatus provided with the inversion movement mechanism of the tool which comprises the tire attachment / detachment method which concerns on this invention. The side view which shows the tire attachment / detachment apparatus provided with the inversion movement mechanism of the tool which comprises the tire attachment / detachment method which concerns on this invention. The example which shows the inversion mechanism of a tool. The example which shows operation | movement of a tool and a tool arm. FIG. 2 is a plan view, a front view, and a side view of a general tire attaching / detaching device. When the tool moves to the opposite side of the tire.

  1 and 2 show an embodiment of a tire attaching / detaching device constituting a tire attaching / detaching method according to the present invention, and the basic structure is common to the device shown in FIG. In the figure, 1 is a base, 2 is a tool, 3 is a chuck, 4 is a tool arm, and 5 is a chuck arm. A movable body 6 is placed on the two guide rails 7 and 7 provided on the base 1, and the movable body 6 can move along the guide rails 7 and 7.

  Here, a cylinder that is hydraulically operated is generally used as the moving means. The chuck arm 5 is attached to the moving body 6 and can swing up and down via a shaft 8. The chuck 3 is attached to the tip of the chuck arm 5, and the chuck 3 can be rotated by a motor (not shown).

  On the other hand, the tool 2 is attached to the tip of the tool arm 4. The tool arm 4 is attached to the movable table 9, and is configured to be able to turn in the vertical direction about the shaft 10 of the bracket 12 attached to the movable table 9. Here, a hydraulically operated cylinder 11 is used as a swiveling means of the tool arm 4, the cylinder 11 is attached to a bracket 12, and the tip of the piston rod is connected to the tool arm 4.

  Therefore, if the piston rod of the cylinder 11 extends, the tool arm 4 falls and faces toward the center of the tire, and if the piston rod contracts, the tool arm 4 turns upward and stands as shown in FIG. The moving base 9 to which the tool arm 4 is attached rests on the two guide rails 13 and 13 provided on the base 1 and can move along the guide rails 13 and 13. Here, a cylinder (not shown) is generally used as the moving means of the moving table 9.

  The tool 2 has a disk-shaped dish-shaped disk 14 and a tire claw 15, and the dish-shaped disk 14 is rotatably mounted so that the tire can be removed from the wheel by pressing the side surface of the tire and the vicinity of the bead. And the tire nail | claw 15 latches to a tire bead, and a bead is removed from a wheel because a tire rotates. However, in the present invention, the form of the tool is not particularly limited, and a cylindrical bead roller can be attached to the tip of the tool arm 4.

  A wheel 17 fitted with a tire 16 is attached to the chuck 3 and is fixed by engaging the chuck 3 with a central hole of the wheel 17. The chuck 3 has a structure in which a plurality of links are combined. Therefore, the chuck 3 can be engaged and attached regardless of the inner diameter of the central hole of the wheel 17. However, the chuck 3 is only one means for attaching the wheel 17 and can be constituted by using other attachment means.

In the tire attaching / detaching device of the present invention, the tool 2 at the tip of the tool arm that is in a collapsed state does not collide with the tire 16 when the moving table moves along the guide rail. That is, if the tool 2 moves and approaches the tire 16, the tool arm 4 can turn up and stand up. You can move beyond. Of course, it is also possible to control the tool arm 4 so that the tool arm 4 is swung upward when the movable table 9 starts moving.
If it moves beyond the tire 16, the tool arm 4 falls down and returns to its original position (orientation).

Incidentally, a sensor 18 that emits laser light is attached to the movable table 9. It is detected that the moving table 9 for irradiating the laser beam has moved and the tool 2 has approached the tire 16, and the tool arm 4 turns upward to stand. Then, when it is detected that the tire 16 has been exceeded, the tool arm 4 turns downward and falls. A signal from the sensor 18 is transmitted to the electromagnetic valve, and the cylinder 11 can be operated to expand and contract the piston rod.
In a state where the tool 2 stands up to cross the tire 16, the tool 2 reverses its direction. Of course, the operation of reversing the direction of the tool 2 can also be performed at the stage of moving and exceeding the tire 16.

  FIG. 3 is a specific example showing a tool reversing mechanism. The tool arm 4 is attached to a bracket 12 fixed to a movable table 9. A rack 19 is attached to the bracket 12, and the rack 19 can be slid by the operation of a cylinder 20. . A pinion 21 is provided at the base of the tool arm 4, and the pinion 21 meshes with the rack 19.

Therefore, if the cylinder 20 is actuated and the rack 19 slides, the pinion 21 rotates and the direction of the tool 2 attached to the tip of the tool arm 4 can be changed.
FIG. 3A shows a state where the piston rod of the cylinder 20 is extended and the rack 19 is moved rightward. In this case, the dish-shaped disk 14 of the tool 2 is located on the left side. On the other hand, FIG. 3B shows a state in which the piston rod of the cylinder 20 contracts and the rack 19 moves to the left. In this case, the dish-shaped disk 14 of the tool 2 is located on the right side. That is, the tool 2 is rotated 180 ° and its direction is reversed.

4A to 4I show one specific example of the movement and reversal operation of the tool. FIG. 4A shows the case where the tool 2 is located on the left side (front side) of the tire 16.
(B) is a case where the tool arm 4 with the tool 2 attached to the tip is pivoted upward.
(C) is a case where the tool arm 4 is turned up and stood up.
(D) is a case where the tool 2 is rotated 180 ° to reverse the direction.
(E) is a case where the moving table 9 starts moving in the right direction (back side direction). At this time, laser light is emitted from the sensor 18.
(F) is a case where the moving table 9 moves and the laser light from the sensor 18 hits the tire 16 to detect the presence of the tire 16.
(G) is a case where it is detected that the moving base 9 has further moved and passed through the tire 16 by laser light.
(H) is a case where the moving base 9 further moves to the right side (back side) to a predetermined position.
(I) is the case where the tool arm 4 to which the moving base 9 is attached at a predetermined position and the tool arm 4 is turned downward and falls and returns to the original position.

Here, the operation of the tool 2 and the tool arm 4 shown in FIGS. 4A to 4I is only one specific example, and the order of some operations can be changed. The tool 2 may be controlled to move from the right side (back side) of the tire to the left side (front side).
The reversing mechanism of the tool 2 is not limited to a mechanism using a rack-pinion as shown in FIG.

1 Base 2 Tool 3 Chuck 4 Tool Arm 5 Chuck Arm 6 Moving Body 7 Guide Rail 8 Axis 9 Moving Table
10 axes
11 cylinders
12 Bracket
13 Guide rail
14 Disc
15 Tire claw
16 tires
17 wheel
18 sensors
19 racks
20 cylinders
21 Pinion

Claims (1)

The swinging arm is attached to a moving body that moves along the guide rail, and the tip of the arm is provided with a mounting portion such as a chuck for rotating by attaching a wheel, and is directly engaged with the rotating tire. In order to release the tire beads on both sides from the fixed state in a method of attaching and detaching a tire using a tire attaching and detaching device which is attached to the tip of a tool arm extending from a moving table moving along a guide rail and is movable. In order to avoid collision with the tire when moving the tool from one side of the tire to the other side, the presence of the tire is detected by a laser beam emitted from a sensor attached to the moving table, and the approach to the tire is detected to detect the above. reoriented by 180 ° rotation while standing turning tool arm upward, and test that the tire tool passes Tire method of detachably, characterized in that the operative tool arm to fall to the original position and pivoted downwardly.

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