JPH07125513A - Annular body automatically attaching method and device - Google Patents

Abstract

PURPOSE:To attempt automation for easy processing and measurement of an annular body by positioning and aligning the annular body on the basis of the relative distance difference between the lowest and the highest positions of the annular body and respective reference positions, and horizontally moving and supporting a supporting disc plate. CONSTITUTION:A tire 1 is vertically erected on the long roll 4 of an elevating stand 2, and the center in the front and back directions of a supporting plate 6 and the center of a circle in the tire 1 are matched to each other, and the attaching positions of light emitting parts 7, 8 and light receiving parts 7', 8' for detecting the position of bead bases 10 on the upper and lower sides of the tire 1 are taken as first and second reference positions. And both bead bases 10 are moved to the first and second reference positions by the elevating stand 2, and moving amount signals by an encoder 11 are input into the storage device 14 of a controller 13, thereby the elevating stand 2 is raised, lowered and aligned by the distance of 1/2 of the difference between both signal amounts and a liquid pressure cylinder 3. Next, a bead seat 9 is pressed and fitted into the tire 1 by horizontally moving the supporting disc plate 6. Accordingly, processing and measuring can be accurately performed by accurate aligning of the tire 1 to the supporting disc plate 6, and also automation can be easily performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention particularly relates to a method and apparatus used when a vehicle tire is mounted on a rim disk to perform tire processing, repair, or various measurements such as tire dimension and uniformity. It is about.

[0002]

2. Description of the Related Art When a tire is mounted on a tire supporting rim composed of a pair of left and right supporting disc plates vertically mounted on a tire processing or measuring apparatus, in a conventionally used apparatus, first, the tire is lifted and lowered. On the table. At this time, the table is divided into positions equidistant from the position directly below the center point of the supporting disk plate in the front-rear direction (direction parallel to the disk plate). 2 vertical rolls are attached horizontally, and the tire tread is placed on the rolls to vertically position the tire, and the center of the tire support disk plate is aligned in the front-rear direction. To do. Next, the elevator is raised by a predetermined amount from the representative values (for example, standard values) of the outer diameter and the rim diameter of each size tire to raise the tire to almost the same height as the supporting disk plate, and the pair of left and right supports An operator places his or her hand on the upper side of the bead seat of one of the disc plates to lean the tire and place one side of the bead portion. Next, a method of lowering the table of the elevator to return the inclination of the tire to vertical, moving the other disc plate horizontally and pushing it into the tire bead part to finish the mounting of the tire on the rim, and a device suitable for it. Was used.

[0003]

When the tires are mounted by the conventional method and apparatus as described above, the centering is performed only in the front-back direction of the apparatus, and the outer diameter value of each tire is also increased. The lift amount of the elevator does not correspond to the variation of the outer diameter of each tire due to the fluctuation (variation) in the tire, and the tire riding on the upper side of the bead seat of the disc plate extends downward due to its own weight. Due to the deformation, a bead seat (hereinafter referred to as a rim base) on the lower side of the disc plate and a bead of the tire are formed.
A gap is formed between the dove (the bottom of the tire bead portion that comes into contact with the rim base), and a tire that is eccentric by that amount is set on the disc plate. Therefore, for example, in the production of retreaded tires, when the tire buffing device is used to buff the tire tread portion, the tire is mounted on the tire supporting device (disk plate) in the above-described eccentric state in the conventional method and device, The tire is eccentrically rotated, the tread surface thereof hits the buff cutting blade, and is unevenly cut on the tire circumference, resulting in a so-called poor uniformity. Further, since the work is carried out with the help of an operator to put the tire on the rim base, the workability is poor, and this point becomes a bottleneck in fully automating the tire processing or the measuring device. In particular, for tires such as tubeless tires where the bead base of the tire has a large taper angle, the tire bead base is placed on the bead seat of the supporting disc plate.
Since it is difficult to place a load on the operator, a great amount of labor is imposed on the worker, and the work efficiency is significantly reduced.

According to the present invention, there is provided a pair of left and right support disk plates for supporting the center of the inner circle of a torus represented by an automobile tire and the inner circumference of the torus so as to vertically hold the torus. Provided are a method and an apparatus for automatically mounting the torus on the supporting disk plate by accurately aligning the center with the center, thereby facilitating automation of an apparatus for processing or measuring the torus such as a tire and the like. The purpose is to enable uniform and accurate measurement of workpiece quality.

[0005]

In order to solve the above-mentioned object, according to the present invention, as described in claim 1, the center of the inner circle of an annular body which is erected vertically on the lifting table and the annular body. A method for automatically mounting the torus on the supporting disc plate by aligning the centers of a pair of left and right supporting disc plates that support the inner circumference of the torus and vertically hold the torus. A step of moving the table in the vertical direction to measure the relative distance (1) between the lowest position on the inner circumference of the torus placed on the table and the first reference position; The step of measuring the relative distance (2) between the highest position on the inner circumference and the second reference position is equivalent to 1/2 of the relative difference between the relative distance (1) and the relative distance (2). The step of vertically moving the lifting platform by the distance to be positioned, and the pair of left and right disks with the torus being mounted on the positioned lifting platform. It is set to automatic mounting process of the annular body and a step for supporting the inner circumference of the annular body by moving the click plate in the horizontal direction. Further, as the apparatus of the present invention, as described in claim 3, an elevating table for vertically mounting and vertically elevating a torus and a torus which supports an inner circumference of the torus. A pair of horizontally movable support disc plates that hold the body vertically, a first detector that detects the lowest position on the inner circumference of the torus, and a second detector that detects the highest position. A moving amount detecting means for detecting a moving amount of the lift which has moved to detect a position on the inner circumference of the torus; and a center position of the inner circle of the torus calculated from the moving amount. Is an automatic mounting device for a torus, which comprises a control device for instructing the amount of vertical movement of the lift table until it is aligned with the center position of the support disk plate.

[0006]

According to the present invention, the center position of the inner circle of the torus is accurately calculated in a state where the torus is vertically mounted on the lifting table or on a long roll on the table. Move until the center position of the inner circle coincides with the center position of the supporting disc plate, and horizontally position the pair of left and right supporting disc plates with the torus on the lifting platform or on the long roll on the platform. And the inner ring of the torus is fitted onto the bead seat of the supporting disc plate to mount the torus on the supporting disc plate. The lower cross section of is deformed by its own weight,
The center position of the inner circle can be accurately determined even when the outer diameter of each annular body, for example, the outer diameter of the tire varies. Further, as in the case of the conventional method device, a flexible annular member such as a tire is placed on the bead seat on the upper side of one of the disks, and the elevator is lowered to suspend the annular member. The eccentricity due to the distortion of the circular shape of the annular body due to the self-weight of the annular body does not occur.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A detailed description will be given below of a case where the present invention is applied to a tread buff cutting device for a retreaded tire as an embodiment of the present invention. FIG. 1 shows an automatic tire mounting apparatus according to the present invention. In order to avoid complicating the description, the device for buffing the tread surface of the retreaded tire is omitted from this figure.
(2) is an elevating table on which the tire (1) is vertically erected and placed, and can be vertically moved up and down by a fluid pressure cylinder (3). On the elevating table, a support disk plate (6) is formed in order to align the front-back direction (perpendicular to the paper surface in the figure).
A pair of rotatable long rolls (4), which are distributed equidistantly in the front-rear direction from immediately below the center of (6 ') and placed horizontally at right angles to the front-rear direction, are attached. Tires are long
When placed on the base, the center of the support disk plate in the front-rear direction and the center of the tire inner circle are automatically aligned. In order to hold the tire vertically, a pair of left and right tires (5) and (5 ') for preventing the tilt and fall of the tire are mounted on the lifting table so as to be movable in the left-right direction, and the roll of the tire is attached. It is also possible to bring the tires into contact with both side surfaces to suppress the fluctuation of the tire to the left and right. (7) and (7 ') are the light emitting part and the light receiving part of the lower detector for detecting the position of the bead base (10) under the tire, which are installed outside the outer circumference of the supporting disk plate. Is the first reference position. (8) and (8 ') are the light emitting part and the light receiving part of the upper detector for detecting the position of the bead base on the upper side of the tire, which are installed outside the outer circumference of the supporting disk plate. Use as the reference position. The distance from the center of the support disk to the first and second reference positions is equal. In order to detect the amount of movement of the lift table that moves the tire bead base to the first and second reference positions, an encoder (11) attached to the lift table has a frame (12) of an automatic tire mounting device. ) Rolls on the surface. A signal from the encoder that detects the amount of movement of the lift is input to the storage device (14) of the control device (13). After the lift is raised and the amount of movement until the lower bead base reaches the first reference position is detected and stored, further movement of the lift causes the upper bead base to move to the second reference position. The signal of the movement amount when reaching the
When it is input to, the arithmetic unit (15) calculates the relative distance (1) and the relative distance (2) and calculates the relative difference between them. A movement command for a distance corresponding to ½ of the calculated relative difference is transmitted to the hydraulic cylinder as a signal. The hydraulic cylinder operates in accordance with the movement command to raise the lift table by the predetermined amount, and the tire is placed at a position where the center of the inner circle of the tire coincides with the center of the supporting disk plate. Support disc plate (6),
(6 ') is provided with a bead seat (9) on the outer peripheral portion, on which a bead base of a tire can be placed.
Further, the support disc plate can move horizontally to the left and right, and when the tire is mounted, the disc plates approach each other and the bead seats of the disc plate are pushed in and fitted under the tire bead base to fit the fitting portion. -Seal. In this state, the tire is filled with a predetermined internal pressure to buff the tire. After the tire is subjected to the predetermined processing, the air is discharged, the space between both disc plates is expanded, and the tire is placed on the lift table which is lifted and waiting in advance and taken out of the machine.

Next, the operation according to the method of the present invention using the apparatus of the present invention will be described. First, the centering operation for aligning the center of the inner circle of the tire with the center of the supporting disk plate will be described. A tire to be processed or measured (for example, inspection of a defective portion of the tire or measurement of various dimensions of the tire) is vertically mounted on a lift at the lowest point position. At this time, the pair of long rolls are installed on the upper surface of the lifting table, and the tire is placed on the long rolls and the centering in the front-rear direction is automatically taken. Next, the lift table is raised, and the rising distance is detected by the encoder and stored in the storage device of the control device. When the elevating platform continues to rise and the bead base reaches the first reference position, that is, the lowest point of the inner circle of the tire
When the substrate reaches the position where it blocks the light beam from the light emitting portion of the lower detector, the signal from the light receiving portion enters the storage device of the control device. The elevating table further rises, and the encoder continuously sends the amount of rise to the storage device. When this rise causes the bead base to reach the second reference position, that is, the bead base at the uppermost point of the tire inner circle exceeds the light beam from the light emitting part of the upper detector and emits light to the light receiving part. When it is passed in the direction, a signal is sent from the light receiving unit to the storage device. At this point, the arithmetic unit of the control device is encod-
The amount of electric signal from the datum is taken out, and the amount obtained from the calculation of the following formula is used as the positioning movement amount of the lifting table for centering, and the hydraulic cylinder is operated to finally move the lifting table. X = (X _BH −X _BL ) / 2, where X is the amount of positioning movement of the lifting table for centering. X _BL : Lifting distance of the lift from the position of the bottom of the lift to the position where the bead base at the bottom of the inner circle of the tire blocks the light beam of the lower detector. X _BH : Lifting distance of the lift from the position of the lowest point of the lift to the position where the bead base at the top of the inner circle of the tire passes the light beam of the upper detector. Thus, when the lift table is positioned and stopped, the center of the inner circle of the tire and the center of the support disk plate are in the centered state, and the centering operation is completed.

When the centering operation is completed as described above, the position of the lift table is then held in this state, and
Both support disc plates are moved horizontally to narrow the gap between the two support disc plates and the rim base is attached to the tire bead base.
Push down underneath to fit and air at the bead base
And mount the tire on the supporting disc plate. In this embodiment, since the support disk plate and the tire are accurately aligned in this way, the buff cutting of the tire can be performed uniformly without eccentricity.

In the above example, the upper and lower detectors are installed outside the outer circumference of the supporting disk plate, but the upper and lower detectors may be installed inside the supporting disk plate if necessary. In this case, X _BH is the moving distance of the elevator from the lowest point of the elevator until the bead base at the highest point reaches the position where it blocks the light beam of the upper detector.

When the torus is mounted on the supporting disk plate by the method and apparatus of the present invention, there may be variations in the outer diameter of the torus, or if the torus is mounted on a lift table. Accurately machine or measure the torus because the inner circle of the torus and the center of the support disk plate are accurately aligned even if the grounded part of the rigid torus is compressed and bent by its own weight. You can Further, even if the shape of the bead base such as a tubeless tire is difficult to fit to the support disk plate, the operator's hand is not troubled at the time of mounting, so that the mounting work efficiency can be improved. Further, the main part of the components of the apparatus of the present invention is an encoder for detecting the amount of movement of the upper and lower detectors and the lift.
Since it is a relatively simple control device, it can easily be fully automated to attach to various existing torus measuring and measuring devices.

[Brief description of drawings]

FIG. 1 is a front view of an automatic tire mounting device according to the present invention.

FIG. 2 is a schematic side view of an automatic tire mounting device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tire 2 Lifting table 3 Hydraulic cylinder-4 Long roll 5, 5'Tilt tilt prevention roll 6, 6'Support disc plate 7 Light emitting part of lower detector 7'Light receiving part of lower detector 8 Light emitting part of upper detector 8'Light receiving part of upper detector 9 Bead seat (rim base) 10 Bead base 11 Encoder 12 Frame 13 Control device 14 Storage device 15 Computing device

Claims (4)

[Claims] 1. A pair of left and right support disk plates for vertically supporting the center of an inner circle of an annular body and an inner circumference of the annular body which are erected vertically on a lift table. A method for automatically mounting the torus on the supporting disk plate by aligning the center with the center, wherein the lifting platform is moved in the vertical direction to position the torus on the inner circumference of the torus. Measuring the relative distance (1) between the lowest position of the second reference position and the first reference position, and measuring the relative distance (2) between the highest position on the inner circumference of the torus and the second reference position. A step of vertically moving and positioning the lifting table by a distance corresponding to 1/2 of the relative difference between the relative distance (1) and the relative distance (2), and a ring on the positioned lifting table. The process of automatically moving the pair of left and right disk plates horizontally while supporting the inner circumference of the torus How to wear. 2. The tire automatic mounting method according to claim 1, wherein the torus is a tire. 3. A pair of left and right support disk plates for vertically supporting the center of an inner circle of an annular body and an inner circumference of the annular body which are erected vertically on a lift table. A device for automatically mounting the torus on the support disk plate by aligning the center with the center, and comprising an elevating table for vertically mounting the torus and vertically moving the torus, and a horizontally movable device. A pair of support disk plates, a first detector for detecting the lowest position on the inner circumference of the torus, a second detector for detecting the highest position, and a position on the inner circumference of the torus. A moving amount detecting means for detecting the moving amount of the lift moved for detection, and a control device for computing the center position of the inner circle of the torus from the moving amount and instructing the vertical moving amount of the lift. Automatic mounting device for torus. 4. The tire automatic mounting device according to claim 3, wherein the torus is a tire.