JPH03231834A - Rim exchanging device of tire uniformity machine - Google Patents

Abstract

PURPOSE:To make the exchanging of rim possible without exchanging a lower spindle assembly by a method wherein a lower spindle and a lower rim holder is made attachable and detachable through a locking means equipped with a lock shaft, which can rotate about its axis center concentric to the axis center of a tire. CONSTITUTION:The lower rim holder 23 of a lower rim assembly 9 and the lower spindle 12 of a lower spindle assembly 5 are engaged with or disengaged from each other through a locking means 28 equipped with a lock shaft 41, which can rotate about its axis center concentric to the axis center of a tire. Accordingly, the lower spindle assembly 5 separates from the lower rim assembly 9 in the exchange of rim, resulting in allowing to exchange only an upper rim assembly 7 and the lower rim assembly 9.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rim changing device for a tire uniformity machine.

(Prior Art) Conventionally, a tire is provided with an upper rim and a lower rim that are fitted into the bead portion of a tire, and an elevating means for lifting the tire on the tire conveying means so as to sandwich it from above and below between the upper rim and the lower rim, An assembly workbench having a plurality of holding holes is provided below the tire conveyance means, the upper rim is detachably attached to the upper spindle via an upper rim holder, the lower rim is attached to the lower rim holder, and the upper A tire uniformity machine in which a tire sandwiched between a rim and a lower rim is rotated around the axes of an upper spindle and a lower spindle located on this axis is known, for example, from Japanese Patent Publication No. 63-48699. ing.

This prior art rim assembly is constructed as shown in FIG.

That is, in FIG. 8, 51 is an upper rim assembly;
It consists of an upper rim 52, an upper rim holder 55 having a tapered cone part 53 consisting of a tapered male part and a tapered female part, and a chucked part 54, and is rotatable concentrically with an upper spindle (not shown). It is attached removably. A lower rim 56 is attached to a lower spindle 58 having a tapered centering part 57 that is fitted into the tapered female part, and the spindle 58 is rotatably supported by a spindle case 60 via a tapered roller bearing 59 or the like. ing. At the lower part of the spindle case 60, there is a housing part 63 into which the head 62 of the lifting cylinder 61 is fitted.
is provided, and a means 64 for engaging and disengaging the handle 2 fitted into the housing portion 63 is provided.

Reference numeral 65 denotes an assembly workbench, which has a plurality of holding holes 66, and has a plurality of holding holes 66, which can be switched on the axis of the lifting cylinder 61, that is, on the extension of the axis of the spindle 58 (it is movable with a turntable, etc.). , located below the tire conveyance means.

In the above-mentioned prior art, mounting and replacement of the rim are performed as follows. That is, the upper rim assembly 51, the lower rim 56, and the lower spindle 58 according to the size of the tire T are assembled in advance into the holding hole 66 of the assembly workbench 65 provided below the tire conveyance means before the tire is mounted. The upper rim assembly 51 is assembled and held by an elevating cylinder 61 that passes through a holding hole 66 of an assembly workbench 65 and moves up and down on the axial extension line of the lower spindle 58.
The lower rim 56 and the lower spindle 58 are raised in the assembled state, and the upper rim assembly 51 is moved to the chucked portion 54.
etc. to the upper spindle (not shown). after that,
Attaching the upper rim assembly 51 to the upper spindle 1
Both the lower rim 56 and the lower spindle 58 are lowered below the tire conveying means by lowering the lifting cylinder 61. Next, the lower rim 56 is fitted into one bead part B of the tire T carried directly under the spindle by the tire conveyance means, and the tire T is lifted by the lifting cylinder 61 together with the lower spindle 58, and the other bead part B is lifted up together with the lower spindle 58. The tire T was mounted by fitting the portion B2 into the upper rim 52 from below and sandwiching the tire T between the upper rim 52 and the lower rim 56 from above and below.

When replacing the rim, the lower rim 56, lower spindle 58, etc. are raised by the lifting cylinder 61, and after the upper rim holder 55 and lower spindle 55 are fitted, the upper spindle (not shown) and the upper rim holder 55 are fitted. By releasing the attachment and lowering the lifting cylinder 61, the rim assembly including the upper and lower rims 52 and 56 is transferred and held in the holding hole 66 of the assembly workbench 65. Then, after moving the assembly workbench 65 in the horizontal direction and positioning the rim assembly to be replaced on the axis of the lower spindle 58, the rim assembly is raised again by the lifting cylinder 61 and the upper part is moved as described above. The rim holder 55 is fitted and locked to the upper spindle, and the lower rim 56 and the like are lowered to wait for the tire T to be carried in.

(Problems to be Solved by the Invention) By the way, in the above-mentioned prior art, when replacing the upper rim 52, lower rim 56, etc. for each tire size, the lower spindle 5B is integrally replaced with the upper and lower rims 52 and 56. For example, when there are several types of rims, it is necessary to prepare the same type of lower spindle 58 assemblies.

However, as shown in FIG. 8, the assembly of the lower spindle 58 includes a bearing 59, a spindle case 60, etc.
Moreover, it was expensive because it required high-precision machining.

The present invention was made in view of the above-mentioned circumstances, and
The object is to provide an inexpensive rim changing device for a tire uniformity machine that can fit one type of lower spindle assembly to various types of rim assemblies when changing the rim.

(Means for Solving the Problems) In the present invention, the following technical measures were taken in order to achieve the above object.

That is, the present invention provides an upper spindle 4 that rotates coaxially with the tire axis, an upper rim holder 18 and an upper rim 1 that are removably provided at the lower part of the upper spindle 4.
0, a lifting means 8, a lower spindle assembly 5 provided on the lifting means 8, a lower rim holder 23 and a lower rim 11 provided on the upper part of the rotatable lower spindle 12. an upper rim holder 18, and a transport means 3 for supporting and supplying and discharging the tire T and the upper and lower rim assemblies 7, 9;
In a tire uniformity machine in which a lower rim holder 23 is detachable, the lower spindle 12 and the lower rim holder 23 are provided with a lock shaft 41 that is coaxial with the tire axis and rotatable around the tire axis. It is characterized in that it can be freely engaged and detached via a locking means 28.

(Function) According to the present invention, the lower rim holder 23 of the lower rim assembly 9 and the lower spindle 12 of the lower spindle assembly 5
can be engaged or disengaged by a locking means 28 having a locking shaft 41 that is coaxial with the tire axis and rotatable around the axis. Therefore, when replacing the rim, the lower spindle assembly 5 can be Separated from the lower rim assembly 9, only the upper and lower rim assemblies 7.9 can be replaced.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 7 shows a schematic front view of the entire tire uniformity machine, in which the main frame 2 is provided with a roller conveyor device 3 as a means for transporting tires T, and an upper spindle is disposed perpendicularly thereto. 4. A lower spindle assembly 5 is disposed concentrically with the tire axis in a vertically corresponding manner, the upper spindle 4 is rotatable by a rotary drive device 6, and an upper rim assembly 7 is held at the lower end of the upper spindle 4. has been done. On the other hand, the lower spindle assembly 5 is supported by a piston rod 8a of an elevating means 8 such as a hydraulic cylinder, and a lower rim assembly 9 is detachably held at the upper end of the lower spindle assembly 5. A tire T is attached to the rim 10.11 in a pinched manner, and an upper spindle 4 and a lower spindle 12, which will be described later, are rotatable together. In addition, 13 is a load loading device,
14 is a load detection device.

As shown in FIG. 1, an assembly workbench 15 having a plurality of through holes 15a is provided below the conveyance means 3, and this assembly workbench 15 can be configured, for example, by a turntable, etc. The position can be changed freely so that the hole center of the upper spindle 4 coincides with the axial extension line of the upper spindle 4.

The conveyance means 3 has an opening (not shown) through which the upper rim assembly 7 and the lower rim assembly 9 can pass, at a position corresponding to the upper spindle 4, which is the rim attachment or replacement position, and , is equipped with a centering mechanism for the transported tires T.

A chuck means 16 is provided in the upper spindle 4, and a tapered fitting hole 17 is provided at the lower end so that the upper rim assembly 7 can be detachably held therein.

The upper rim assembly 7 consists of the upper rim 10 and an upper rim holder 18, which are connected by bolts or the like. The upper rim holder 18 has a tapered cone section 21 in the center thereof consisting of a male taper 19 and a female taper 20, and is held in the tapered cone section 21 by the chuck means 16 of the upper spindle 4. A locking projection 22 is provided, and the locking projection 22 is locked to the chuck means 16 when the male taper 19 is fitted into the fitting hole 17 of the upper spindle 4.

The lower rim assembly 9 consists of the lower rim 11 and a lower rim holder 23, both of which are connected by a port 24. This lower rim holder 23 has female tapered cone portions 2526 protruding from above and below the center thereof.
The upper female taper cone portion 25 can be fitted into the female taper 20 of the upper rim holder 18, and when the upper and lower rim holders 18.23 are in the fitted state, it is held between the upper and lower rims 10.11 from above and below. tire T
A hole 27 for introducing air or the like is provided in the hole 27 . Also,
Lower conical tapered cone portion 26 of lower rim holder 23
is provided with a lock hole 29 in the center of which the locking means 28 can be inserted and removed from below, and the female tapered cone portion 26
is adapted to be removably fitted into the lower spindle 12.

The lower spindle assembly 5 includes the lower spindle 1
2 and upper and lower tapered roller bearings 30.31
It consists of a spindle case 32, a bearing retainer 33 and its tightening nut 34, and a casing 36 that connects the spindle case 32 to the upper end of the piston rod 8a and houses the drive device 35 of the locking means 28. The spindle case 32 is fixed with bolts 38 via a spherical seat 37.

The lower spindle I2 is hollow, and has a flange portion 12a formed on the outer periphery of the upper end, and a lower rim holder fitting portion 39 made of a female taper is provided at the center, as well as a ball holder accommodating recess 40, which will be described later. It is being

The locking means 28 includes a lock shaft 41 that is fitted into the hollow part of the lower spindle 12 and is rotatable about the tire axis on the same axis as the tire axis;
The drive device 35 , for example, a row actuator, is connected to the lower end of the lock shaft 41 and is attached to the lower end of the lower spindle 12 within the casing 36 via a metal fitting 42 . It consists of a cylindrical ball holder 43 and a lock ball 44 which are fixed in the recess 40 of.

As shown in FIGS. 4 and 5, a recess 45 for releasing the lock ball is provided on the outer periphery of the upper end of the lock shaft 41.
are placed at equal pitches in three locations.

Further, the ball holder 43 is provided with three ball fitting holes 46 penetrating in the radial direction corresponding to the recesses 45 of the lock shaft 41, and lock balls 44 are inserted into the holes 46.
is fitted so as to be movable in the radial direction.

A ball holder 43 is removably fitted into the lock hole 29 of the lower rim holder 23, and an annular lock groove 47 is formed on the inner peripheral surface of the lock hole 29 in correspondence with the lock ball 44. As shown in FIG. 5, the lock ball 44 is pushed into the lock groove 47 by the outer diameter portion of the lock shaft 41, so that the lower rim holder 23 is locked to the lower spindle 12.

Reference numeral 48 denotes a working air supply pipe to the drive device 35, such as a rotary actuator, which is connected via a rotary joint 49, so that the drive device 35 can freely rotate together with the lower spindle 12.

Next, the operation of the above embodiment will be explained.

The upper and lower rim assemblies 7 and 9, which are rim-assembled concentrically with the through hole 15a of the assembly workbench 15, are attached to the lower rim holder of the lower spindle 12, which is raised through the through hole 15a by the lifting movement of the lifting means 8. The female tapered cone portion 26 of the lower rim holder 23 is fitted into the fitting portion 39, and the ball holder 43 and lock ball 44 of the locking means 28 are fitted into the lock hole 29. At this time,
As shown in FIG. 6, the lock shaft 41 has a recess 45 at a position corresponding to the lock ball 44, and the lock ball 44 in the ball fitting hole 46 is in contact with the recess 45, so that the ball holder 43 Easily lock hole 2
Insert into 9. Therefore, when the drive device 35 is driven to rotate the lock shaft 41 by 60 degrees, the lock ball 44 is pushed radially outward by the outer diameter portion of the lock shaft 41 and fitted into the lock groove 47 of the lock hole 29. Then, the lower spindle 12 and the lower rim holder 23 are locked through the locking means 28.

Furthermore, the upper and lower rim assemblies 7 and 9 are lifted up, and the locking protrusion 22 and tapered cone portion 21 of the upper rim holder 18 are fitted into the fitting hole 17 of the upper spindle 4, and the locking protrusion 22 is moved by the chuck means 16. be grabbed and held.

Therefore, when the elevating means 8 is switched to the lowering motion, the lower rim assembly 9 is separated from the upper rim assembly 7 and lowered, and is stopped at a position below the tire conveying means 3.

When the tire T is transported by the tire transport means 3, the elevating means 8 is raised again, and the bead portion B1 of the tire T is lifted.
is fitted to the lower rim 11, and while aligning the upper rim 10 and the lower rim 11 via the tapered cone parts 21.25, the bead part B2 is fitted to the upper rim 10, and as shown in FIG. As shown, the tire T is sandwiched between the upper and lower rims 10.11.

In the tire clamping state shown in FIG. 1, air is supplied to the tire T, the upper spindle 4 is driven to rotate, and necessary tests are performed while the tire T is being rotated.

When this test is completed, the air inside the tire is exhausted and the upper rim 10 is chucked to the upper spindle 4.
When the lifting means 8 is moved downward, the tire T is lowered while being supported by the lower rim 11.

In this case, even if the female taper 20 of the upper rim holder 18 and the male taper cone portion 25 of the lower rim holder 23 come into close contact, the lower rim assembly 9 is forcibly pulled down by the lowering of the lifting means 8 by the locking means 28, and the upper Rim holder 18
The lower rim holder 23 is reliably separated from the rim.

As the elevating means 8 moves downward, the tire T is transferred onto the conveying means 3 and carried out from directly below the spindle 4.

When replacing the rim after transporting the tire T, the elevating means 8 is raised again, the lower rim assembly 9 is aligned with the upper rim assembly 7, and then the locking protrusion 22 is chucked by the chuck means 16. Upon release and then downward movement of the lifting means 8, the upper rim assembly 7 is separated from the upper spindle 4 and mated onto the lower rim assembly 9, as shown in FIG. Further, while lowering the elevating means 8, the drive device 35 is operated to move the lock shirt 41 to 60.
When the upper and lower rim assemblies 7.9 are both transferred onto the assembly workbench 15, the locking means 28 escapes from the locking hole 29 and the lower spindle assembly 5 is assembled. From the workbench 15 downwards, the third
The state shown in the figure will be reached.

Therefore, the upper and lower rim assemblies 7.9 corresponding to the tire size to be replaced are positioned directly above the lower spindle 12 of the assembly workbench 15, and are moved to the lower rim assembly 9 by the upward movement of the elevating means 8 as described above. The lower spindle 12 is fitted and locked, raised to fit the upper rim assembly 7 onto the upper spindle 4, and the rim replacement is completed by the same procedure as described above.

The present invention is not limited to the above-mentioned embodiments. For example, the locking means 28 can be constructed by using the lower female tapered cone portion 26 of the lower rim holder 23 as a ball holder and fitting a lock ball therein. .

(Effects of the Invention) As described above, the rim changing device for a tire uniformity machine according to the present invention has a lock that allows the lower spindle 12 and the lower rim holder 23 to rotate around the tire axis on the same axis as the tire axis. Locking means 28 with shaft 41
Since it can be freely engaged and detached through the rim, when replacing the rim, there is no need to replace the lower spindle assembly 5.
Since only the upper and lower rim assemblies 7.9 need to be replaced, there is no need to prepare expensive lower spindle assemblies for each rim assembly for each type of tire size, thereby increasing economic efficiency.

In addition, even when assembling the rim on the assembly workbench, there is no need to assemble the lower spindle assembly, improving work efficiency.
The weight of the rim assembly on the assembly workbench is reduced, the assembly workbench can be easily moved horizontally, and the space below the assembly workbench can be designed to be small.

[Brief explanation of drawings]

Fig. 1 is a central joint sectional view showing the main parts of the embodiment of the present invention when the tire is mounted, Fig. 2 is a center vertical sectional view showing the main parts of the embodiment of the invention while the rim assembly is being raised and lowered, and Fig. 3 is the rim. A central longitudinal cross-sectional view of the main parts of the same, showing the state immediately before holding or lifting the assembly;
FIG. 4 is an enlarged cross-sectional view of the main part of the locking means, FIG. 5 is an enlarged cross-sectional view taken along the line A-A in FIG. 4, and FIG. FIG. 7 is a front view of a tire uniformity machine to which the present invention is applied, and FIG. 8 is a longitudinal cross-sectional view of the main part of the conventional example. 3... Conveyance means, 4... Upper spindle, 5...
Lower spindle assembly, 7... Upper rim assembly, 8.
... Lifting means, 9... Lower rim assembly, 10... Upper rim, 11... Lower rim, 12... Lower spindle, 18... Upper rim holder, 23... Lower rim holder , 28... Lock means, 41... Lock shaft, T... Tire.

Claims (1)

[Claims] (1) An upper spindle (4) that rotates coaxially with the tire axis, an upper rim holder (18) and an upper rim (1) that are removably provided at the bottom of the upper spindle (4).
an upper rim assembly (7) consisting of 0) and a lifting means (8);
, a lower spindle assembly (5) provided on the lifting means (8), a lower rim holder (23) and a lower rim (11) provided on the upper part of the rotatable lower spindle (12). Rim assembly (9) and tire (T
) and a conveying means (3) for supporting and supplying and discharging the upper and lower rim assemblies (7) and (9), and the upper rim holder (18
), in which the lower rim holder (23) is removably attached to the lower spindle (12) and the lower rim holder (23).
) is a rim of a tire uniformity machine, characterized in that the rim can be freely engaged and detached via a locking means (28) having a lock shaft (41) coaxial with the tire axis and rotatable around the axis. Exchange device.