JPH0616023A - Tire mounter - Google Patents

Abstract

PURPOSE:To provide such a tire mounter that prevents deformation of an upper bead part and eliminates poor fitting. CONSTITUTION:Pressing an upper bead part 16 downward a bead presser roller 6 rotates about the shaft center 0 of rim 10 so as to force the upper bead part 16 into the rim well. During rotation of the bead presser roller 6, the bead presser roller 6 is elevated gradually by a vertical motion mechanism M.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a tire mounter.

[0002]

Tire mounters are commonly used in automatic rim assembly lines in automobile manufacturing.

Generally, a tire mounter includes a bead expansion rod and a bead pressing roller.

In order to assemble the rim using the tire mounter, first, the bead extension rod that rotates around the rim axis is used to drop the bead portion below the tire into the rim well.

Next, the upper bead portion, which is locked to the upper surface of the rim, is expanded into a bead pressing roller that rotates around the rim axis center while expanding the upper bead portion by a bead expansion rod that rotates around the rim axis center. Press the upper bead part downward,
The upper bead portion was dropped into the rim well.

That is, when engaging with the rim flange of the upper bead portion, after dropping a part of the upper bead portion into the rim well by the bead pressing roller, the bead pressing roller is rotated around the rim axis. .

[0007]

Therefore, in the conventional tire mounter, since the lower end of the bead pressing roller is lowered to at least the rim well position and the bead pressing roller is rotated in that state, the upper bead portion has a rim flange. At the contact position with the bead wire, there is a risk that the bead wire will be greatly deformed, causing permanent deformation and being distorted.

If it is distorted, a fitting failure will occur and the tire cannot be reliably mounted on the rim.

Therefore, an object of the present invention is to provide a tire mounter which prevents deformation of the bead portion and prevents fitting failure.

[0010]

In order to achieve the above object, a tire mounter according to the present invention is provided with a bead pressing roller which rotates around an axis of a rim while pressing an upper bead portion downward. A tire mounter in which a bead portion is dropped into a rim well, and is provided with a vertical movement mechanism that gradually raises the bead pressing roller as it rotates around the axis.

At this time, it is preferable that the ascending range of the bead pressing roller by the vertical movement mechanism is from a position where the upper bead portion can be dropped into the rim well to a position where the bead portion can be locked to the rim flange.

[0012]

Since the bead pressing roller gradually rises with the rotation around the shaft center, the deformation of the bead wire is small, and the deformation recovers after the rim is assembled, and permanent deformation does not occur.

[0013]

The present invention will be described in detail below with reference to the drawings illustrating the embodiments.

FIG. 2 shows a tire mounter according to the present invention. The tire mounter includes a central shaft 1, a rim retainer 2 connected to the lower end of the central shaft 1, and first and first rotatably mounted to the central shaft 1. 2 arms 3 and 4, bead expansion rod 5 and bead pressing roller 6 attached to each arm 3 and 4.
And

Therefore, the arms 3 and 4 are provided with the cylinder 7 constituting the vertical movement mechanism M, and the roller holding member 8 is attached to the piston rod 7a protruding to the lower surface side of the arms 3 and 4.
The bead pressing roller 6 that rotates about a horizontal axis is attached to the roller holder 8.

Therefore, when the piston rod 7a expands and contracts, the roller holder 8 and the bead pressing roller 6 move vertically.

The bead expansion rods 5, 5 are composed of a large diameter portion 5a at the base end and a large diameter portion 5b at the distal end, and each arm 3, 4 is provided.
Have been hung from.

Reference numerals 9 and 9 denote the first and second arms 3 and 4, respectively.
The guide rod is attached to the roller holding body 8 and thereby the bead pressing roller 6 is surely moved up and down.

As shown in FIG. 2, the first and second arms 3 and 4 have their pivotal support portions 3a and 4a pivotally attached to the central shaft 1 while being vertically displaced, as shown in FIG. , Rotates in the horizontal plane about the central axis 1 as shown by arrows A and B.

At the lower position of the rim retainer 2, the rim is
A rim holding base (not shown) for holding the rim 10 is provided, and the rim 10 is fixed on the rim holding base.

In this case, the axis O of the rim 10 and the rim retainer 2
And the axis of the central axis 1 are arranged on the same vertical axis.

Next, a method of mounting the tire 11 on the rim 10 using the tire mounter constructed as described above will be described.

First, the rim 10 is placed on a rim holding table (not shown).
Place and fix.

In this case, the rim holder is separated from the rim retainer 2 by a large distance, and the axis O of the rim 10 and the axes of the rim retainer 2 and the center axis 1 are arranged on the same vertical axis. It

The tire 11 is mounted on the rim 10. In this case, as shown in FIG. 4, a part of the lower bead portion 12 of the tire 11 is dropped into the rim well 13 of the rim 10. Further, the other part of the lower bead portion 12 is locked to the upper end edge portion of the rim flange 14 above the rim 10.

Next, the rim holder is raised, the rim retainer 2 is fitted into the wheel center hole 15 as shown in FIG. 1, and the rim 10 is centered and positioned.

At this time, the pair of bead expansion rods 5 and 5 are located on the side where the lower bead portion 12 is dropped into the rim well 13.

From this state (that is, the state shown in FIG. 3), the arms 3 and 4 are rotated about the central axis 1.

By this rotation, the lower bead portion 12 is moved to the position shown in FIG.
Fall into the rimwell 13 as shown in.

By the way, the lower bead portion 12 is attached to the rim well 13
The bead pressing roller 6 is kept in the raised state until it is dropped into the lower bead portion 12, and does not participate in the dropping operation of the lower bead portion 12.

Next, the cylinder 7 of the vertical movement mechanism M is driven to lower the bead pressing roller 6, and the upper bead portion 16
6 is dropped into the rim well 13 as shown in FIG.

After that, the arms 3 and 4 are rotated. Therefore, the upper bead portion 16 is expanded by the bead expansion rod 5, pressed downward by the bead pressing roller 6, and dropped into the rim well 13.

However, during this rotation, the bead pressing roller 6 gradually rises as shown in FIG.

That is, the rising range of the bead pressing roller 6 is
From a position where the upper bead portion 16 can be dropped into the rim well 13 to a position where the upper bead portion 16 can be locked to the upper rim flange 14.

Therefore, the upper bead portion 16 does not bend sharply, and the deformation of the bead wire in the upper bead portion 16 is small.

That is, after the rim is assembled, its deformation is recovered and permanent deformation does not occur.

By the way, as a position where the bead pressing roller 6 can be dropped, the lower end of the roller is 40 from the rim flange 14.
It is a position lower by about 30 mm, and the position where the bead pressing roller 6 can be locked to the rim flange 14 is a position where the lower end of the roller is lower than the rim flange 14 by about 10 to 20 mm.

If the lower end of the roller is a position higher than the rim flange 14 by 30 mm or more, the upper bead portion 16 is unlikely to fall into the rim well 13, and the lower end of the roller is lower than the rim flange 14 by 40 mm or less. When set in the position, the upper bead portion 16 is deformed unreasonably.

If the lower end of the roller is higher than the rim flange 14 by 10 mm or more as a lockable position, the certainty of the upper bead portion 16 being locked to the rim flange 14 is lowered, and conversely, the lower end of the roller is If the position is lower than the rim flange 14 by 20 mm or less, the upper bead portion 16 may be permanently deformed.

The upper and lower bead portions 16 and 12 are rim wells 13.
After injecting high pressure air into the tire 11, the upper bead part 16 is locked to the upper rim flange 14, and the lower bead part 12 is locked to the lower rim flange 17 when assembled. The work is finished.

The present invention is not limited to the above-described embodiments, and the design can be freely changed without departing from the gist of the present invention. For example, instead of the cylinder 7 as the vertical movement mechanism M, a screw shaft and the screw shaft are used. It is also free to use the one provided with a nut member that is screwed into and out of the.

[0042]

Since the present invention is configured as described above, it has the following effects.

Since the bead pressing roller 6 gradually rises with rotation, the deformation of the bead wire of the upper bead portion 16 is small, and after the rim assembly (tire mounting), the small deformation is recovered and the tire 11 is permanently deformed. It won't happen. Therefore, the tire 11 is securely fitted to the rim 10 and no fitting failure occurs.

[Brief description of drawings]

FIG. 1 is an operation explanatory view of an embodiment of a tire mounter according to the present invention.

FIG. 2 is a front view of a main part of a tire mounter.

FIG. 3 is a schematic plan view of a main part.

FIG. 4 is a simplified cross-sectional view showing a rim assembly process.

FIG. 5 is a simplified cross-sectional view showing a rim assembling process.

FIG. 6 is a simplified cross-sectional view showing a rim assembly process.

[Explanation of symbols]

 6 Bead presser roller 10 Rim 13 Rim well 14 Rim flange 16 Upper bead part M Vertical movement mechanism O Shaft center

Claims (2)

[Claims] 1. A tire mounter in which a bead pressing roller 6 rotates around an axis O of the rim 10 while pressing the upper bead portion 16 downward, and the upper bead portion 16 is dropped into the rim well 13. A tire mounter comprising a vertical movement mechanism M that gradually raises the bead pressing roller 6 with the rotation around the axis O. 2. A bead pressing roller 6 by a vertically moving mechanism M.
2. The tire mounter according to claim 1, wherein the rising range is from a position where the upper bead portion 16 can be dropped into the rim well 13 to a position where the bead portion 16 can be locked into the rim flange 14.