JPH03150142A - Rim mounting device for tire uniformity machine - Google Patents

Abstract

PURPOSE:To control the overall height of a machine by mounting a lever driving device for lifting up and lowering a rod on the side of the rod, connecting one end side of a lever arm with the upper section of the rod and making the arm length of a cylindrical body and a lever fulcrum longer than the arm length of the lever fulcrum and rod side. CONSTITUTION:A lever driving device 38 consists of a mounting component 40 having a lever fulcrum 39 provided on a ceiling section 2A of a main frame on the fixed side, a lever arm 41 supported by the lever fulcrum 39 of the mounting component 40 and a cylinder 42 operating the lever arm 41 at the fulcrum 39. One end side of the lever arm 41 is connected with the upper section of a rod 29 through a tapered roller bearing 43 of double-row type, and the cylinder 42 is provided on the other end side of the lever arm 41. The arm length L1 of the cylinder 42 and the lever fulcrum 39 is made longer than the arm length L2 of the fulcrum 39 and the rod 29 side. AS the rod movement for mounting and removing rims is carried out by the lever driving device, the overall height of a machine can be controlled.

Description

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

(Prior art) The tire includes an upper rim on the upper spindle side and a lower rim on the lower spindle side that fit into the bead of the tire, and the tire lifted from above the tire conveying means is held between the upper rim and the lower rim from above and below, As a rim mounting device for a tire uniformity machine in which a tire is rotated about its axis by rotation of an upper spindle about its axis, there is, for example, a technique disclosed in Japanese Patent Publication No. 63-48698.

(Problems to be Solved by the Invention) By the way, in the above-mentioned prior art, a rond having a chuck at the lower end is inserted and slidably in the axial direction into the upper spindle, and the protrusion to be chucked is held by the chuck. In order to make the grip and release freely possible, a rondo pulling-up device is provided around the upper part of the rondo for pressing and fixing the tapered insertion part to the tapered insertion part through the chuck, and an unlock cylinder is further provided for releasing the chuck. It was designed to overcome the elastic force of the bullet and pull down the rondo.

Therefore, in this prior art, there was a problem in that the overall height of the machine became extremely high because the bullet and the unlock cylinder were arranged in series at the upper part of the rond. In particular, in order to ensure sufficient elasticity of the bullet, the total height of the machine becomes high, and the fact that the cylinder needs power to overcome the bullet is a factor in increasing the total height of the h-additional machine.

As described above, the increase in the total height of the machine means that due to the height restrictions of the building, it may be necessary to disassemble the machine during transportation and to hold the bit during installation.

An object of the present invention is to provide a rim mounting device for a tire uniformity machine that can reduce the overall height of the machine as much as possible.

(Means for Solving the Problems) The present invention includes an upper rim 9 on the lower spindle 7 side and a lower rim 8 on the lower spindle 7 side that fit into the bead portion T1 of the tire T, and The lifted tire T is held between the upper rim 9 and the lower rim 8 from above and below,
The tire uniformity machine is configured such that the tire is rotated around the axis of the upper spindle 10 by rotation around the axis of the upper spindle 10, and a tapered fitting part 16 is formed in the lower part of the upper spindle 10. The tapered insertion part 19 that is inserted into and removed from the upper rim mounting plate 17 from below is connected to the upper rim mounting plate 17.
A chucked portion 20 is provided in the upper center of the tapered insertion portion 19 in an upwardly projecting manner, and a rod 29 having a chuck 30 at the lower end is inserted into the upper spindle 10 so as to be slidable in the axial direction. The part to be chucked 20 with the chuck 30
In order to achieve the above-mentioned object, the following technical measures have been taken in the rim mounting device that can grip and release the rim.

That is, in the present invention, a lever drive device 38 is provided on the side of the rod 29 to pull up and pull down the rod 29, and the lever drive device W38 is attached to a mounting body 40 having a lever fulcrum 39 provided on the fixed side. , a lever arm 41 supported by a lever fulcrum 39 of the mounting body 40 , and a cylinder body 42 that operates the lever arm 41 at the lever fulcrum 39 , one end of the lever arm 41 being connected to the upper part of the rod 29 . is connected to via a tapered roller bearing 43,
The cylinder body 42 is provided on the other end side of the lever arm 41, and the arm length L between the cylinder body 42 and the lever fulcrum 39 is
This is characterized in that l is longer than the arm length L2 between the lever fulcrum 39 and the rod 29 side.

(Sakukawa) When the cylinder body 42 is extended, the lever arm 41 uses the lever fulcrum 39 as a fulcrum to lower the rond 29 and lower the rond 29.
Since the chuck 30 provided at the lower end of the chuck 9 also descends, it expands into the enlarged diameter inner hole 10C by its own elasticity and becomes free, as shown by the imaginary line in FIG.

Next, when both the upper and lower rims 9, 80 are assembled from below and are pushed up through the rise of the lower spindle, the chucked part 20 rises to a position where its constricted part 26 can be secured. Become.

Therefore, when the cylinder body 42 is reduced, the rod 29
is pulled up via the lever arm 41, and the chuck 30 engages with the constricted portion 26 as shown by the solid line in FIG. The tapered fitting portion 16 and the tapered fitting portion 19 of the plate 17 are reliably tightly fitted, the upper rim 9 and the upper spindle 10 are integrated, and the tire T is supported by the upper and lower rims 9°8.

Therefore, when the upper spindle 10 is rotated, the tire T is also rotated and a predetermined inspection is performed.

Here, as the upper spindle 10 rotates, the rod 29 also rotates, but since the upper part of the rod 29 is supported by the tapered roller bearing 43, the rotation prevents the rod 29 from misaligning or lateral vibration. .

(Example) Embodiments of the present invention will be described in detail below with reference to the drawings.

In FIG. 4, l is a tire uniformity machine, and a tire conveying means 3 shown as a roller conveyor for horizontally conveying tires T is housed within a framed main frame 2.
It is equipped with

Reference numeral 4 denotes a lifting device, which is composed of a cylinder 5, a piston rod 6, etc., and is arranged vertically at the bottom of the main frame 2 on the vertical axis, and is connected to a lower spindle 7, a lower rim 8, and a lower rim 8 and an upper rim 9 to lift a tire. It is designed to be lifted when assembled with the T in between.

For this reason, although not shown in the drawings, the tire conveying means 3 is provided with a vertically penetrating window hole for mounting.

Reference numeral 10 denotes an upper spindle, which is inserted into a holder 11 attached to the top of the main frame 2 so as to be rotatable about its axis, and rotated about its axis by a winding drive device 12 provided at the upper part.

Reference numeral 13 denotes a load adding body, which is a so-called substitute road surface, and is attached to the upper rim 9.
The tread of the tire T, which is sandwiched from above and below by the lower rim 8, can be moved toward and away from the tread of the tire T, and when the tire T is rotating around its axis, a load is applied to the tread, and a load detector is detected. It is designed to be measured at 14.

Referring to FIG. 1, the upper spindle 10 has a hollow shaft structure, is supported by a holder 11 with a tapered roller bearing 15, and has a tapered fitting portion 16 formed at its lower end.

Reference numeral 17 denotes an upper rim mounting plate, and the upper rim 9 is attached to this mounting plate 17 with bolts 18. A central portion of the upper rim mounting plate 17 has a plate that can be inserted into and removed from the tapered fitting portion 16 from below. A tapered fitting part 19 is formed, and a protrusion to be chucked 20 is formed at the center of the upper part of the tapered fitting part 19.
is provided in an upwardly projecting shape, and a through hole 21 is formed inside the chucked protrusion 20 .

Furthermore, a female taper fitting part 22 is formed on the upper rim mounting plate 17, and a male taper fitting part 23 is formed on the lower spindle, which can be inserted into and removed from the female taper fitting part 22 from below.
An air passage 24 is formed in the male tapered fitting portion 23 .

The protrusion 20 to be chucked is screwed, and as shown in FIG. , the outer peripheral surface of the head 27 is a tapered insertion portion 28.

Reference numeral 29 denotes a rod having a collet-shaped chuck 30 at its lower end, and is inserted into the upper spindle 10 so as to be slidable in the axial direction.The rod 29 has a passage 31 for supplying air to the tire T in the axial direction. It is formed.

Reference numeral 32 denotes a chuck holder, which screws the upper part of the chuck 30 and also connects the inner hole 10 of the upper spindle 10.
It has a spindle 34 with a seal 33 sliding on it.

The chuck 30 has slits 35 formed in its cylindrical barrel in a radial arrangement upward from the lower end to form a chuck piece 36 to which an elastic force is applied outward in the radial direction.
A chuck portion 37 is formed at the lower end of each chuck piece 36.

Here, as shown in FIGS. 2 and 3, the chuck portion 37 has a tapered surface 37^ for diameter reduction on the upper surface of the outer periphery, a tapered surface 37B for insertion on the lower surface of the inner periphery, and a tapered surface 37B for insertion on the lower surface of the inner periphery. It has a tapered surface 37C that engages with the head 27 via the constricted portion 26.

The inner hole 10^ has a diameter that allows the tapered surface 37C of the reduced diameter collet chuck 30 to irremovably engage the head 27 upward in the axial direction.
A second inner hole 10C, which is slightly larger than the inner hole 10^, is formed through B, and this second inner hole 10c receives the chuck portion 37 of the chuck piece 36, which has been expanded in diameter by its own elasticity, and is used for insertion. The diameter is such that the head 27 of the protrusion to be chucked 20 is received using the tapered surface 37B as a guide, and the stepped portion 10B is configured to reduce the diameter of the chuck piece 36 pulled up via the tapered surface 37^. is being used.

A lever drive device 38 is installed on the side of the rod 29, and is used to pull up and lower the rod 29.

The lever drive device 38 includes a mounting body 40 having a lever fulcrum 39 provided on the ceiling 2^ of the main frame 2, which is a fixed side, a lever arm 41 supported by the lever fulcrum 39 of the mounting body 40, and the lever arm. 41 and a cylinder body 42 that operates at a lever fulcrum 39.
One end side of the lever arm 41 is connected to the upper part of the iron 29 via a double-row tapered roller bearing 43, and the other end side of the lever arm 41 is provided with the cylinder body 42, and the cylinder body 42 and the lever fulcrum 39 are connected to each other. The arm length tt is longer than the arm length 2 between the lever fulcrum 39 and the rod 29 side.

The cylinder body 42 has a cylinder tube pivotally connected to the mounting body 40 via a bracket 44, and the lever arm 41 swings about the lever fulcrum 39 when the cylinder body 42 expands and contracts. The pivot portion 45 with respect to the rod 29 side is constituted by a long hole 46 and a pin 47, and even when the lever arm 41 is swung, the rod 29
can be slid reliably in the axial direction.

48 is a rotary joint, which has an air supply port 48A, to which a flexible air supply pipe 49 shown in FIG. Internal pressure (air) is supplied into the tire T which is sandwiched from above and below via the rotary joint 48. Therefore, the rotary joint 48 is provided at the upper end of the rond 29.

In FIG. 1, reference numeral 49 denotes a pulley, which is fixed to the upper spindle 10 and constitutes the winding drive device 12 by hanging a bell 51 between it and the driving pulley 50. (see figure).

Next, the engagement and disengagement operations of the upper rim 9 with respect to the upper spindle 10 in the above embodiment will be explained.

When the cylinder body 42 is extended, the lever arm 41 slides about the lever fulcrum 39 in the direction of arrow A in FIG. The first inner bore 10 with the piston 34
Since it is guided by A and descends, the chuck portion 37 expands into the second inner hole 10c whose diameter has been enlarged as shown by the imaginary line in FIG. 2, and becomes free.

Next, the upper rim 8 inserted into the bead portion T1 of the tire T
．． 9 are assembled, the lower spindle is raised, that is, the elevating device W4 is lifted, and the protrusion to be chucked 20 is pushed up so that the insertion portion 28 is pushed up to the entire surface 3 of the taper.
7B, it rises to a position where the fin 26 can be held.

When the cylinder body 42 is retracted in this state, the lever arm 41 swings about the lever fulcrum 39 in the direction of arrow B in FIG. 1, and the iron 29 is pulled up.

As a result, the chuck part 37 of the collet chuck 30 engages with the fin part 26 and the head part 27 as shown by the solid line in FIG. The tapered fitting part 19 of the mounting plate 17 is fitted into the tapered fitting part 16 of the spindle 10, and the two are surely tightly fitted, so that the upper rim 9 and the upper spindle 10 are automatically integrated.

Therefore, with air internal pressure being supplied to the tire T and the load adding body 13 being pressed against the tread, the upper spindle 1G is driven to rotate around the axis by starting the winding drive body 12, and the tire A uniformity test of T is performed.

During this test, the tapered roller bearing 43 prevents the rod 29 from misaligning, lateral wobbling, etc.

Note that the cylinder body 42 is
A so-called lock-up cylinder that prevents the flow of working fluid (air, etc.) is used to prevent unexpected malfunctions. Further, the capacity (power) of the cylinder body 42 is set according to the lever ratio.

Furthermore, as shown in FIG. 5, the cylinder body 42 has a rod 29 between it and the piston fitted into the cylinder tube.
The chuck may be provided with a spring 42^ that biases the chuck in the pulling direction.Furthermore, the chuck may be of a type other than a collet type.

Further, instead of the chuck, a bottle lock 30 system as shown in FIG. 6 may be used.

(Effects of the Invention) The present invention is as described above, and the movement for attaching and detaching the rim is performed linearly and slowly from beginning to end along the center axes of the upper and lower spindles, which are the tire axes. Since the tapered fitting part of the rim mounting plate can be inserted and removed from below into the tapered fitting part of the spindle, there is no risk of misalignment or misalignment, and the maintenance and improvement of centering accuracy is extremely ensured. be.

In addition, since the pulling rod is slidably inserted into the upper spindle in the axial direction, the whole is arranged concentrically with the axis of the upper spindle, and the chuck and the protrusion to be chucked are hidden inside the spindle. The mechanism can be made compact and the required movement can be simplified.

In addition to the basic functions and effects, there are the following advantages.

■: The movement of the rondo for attaching and removing the rim is performed by a lever drive device installed on the side of the rim, so the overall height of the machine can be kept as low as possible.

■: By using the lever principle, the diameter of the cylinder body can be made smaller, and the stroke of the cylinder body can be made longer, making it easier to obtain electrical signals for the timing of limit switches, etc. etc. can be easily adjusted.

■2 Furthermore, even if the rond is pushed and pulled by a lever drive device, the upper part of the rond is supported by a tapered roller bearing, so while pushing and pulling is ensured, there is no misalignment of the rod.
Can prevent sideways play, etc.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is an elevational sectional view of the main part, Fig. 2 is a detailed elevational sectional view of the chuck part, Fig. 3 is a cross-sectional view of the chuck part, and Fig. 4 is a tire. FIG. 5 is an explanatory view showing another example of a cylinder body, and FIG. 6 is a sectional view of a bottle-type chuck. l... Machine, 2... Main frame, 3... Tire conveyance means, 7... Lower spindle, 8... Lower rim, 9... Upper rim, 10... Upper spindle,
1 port--Tapered insertion part, 19--Tapered insertion part, 20-Target inner lid part, 29--Rod, 30-
- Chuck, 38... Lever drive device, 39... Lever fulcrum, 40... Mounting body, 41-... Lever arm, 4
2...Cylinder body, 43...-Taper roller bearing.

Claims (1)

[Claims] (1) Comprising an upper rim (9) on the upper spindle (10) side and a lower rim (8) on the lower spindle (7) side that fit into the bead portion (T_1) of the tire (T), the tire conveying means (3 ) The tire (T) lifted from above is placed on the upper rim (
9) and a lower rim (8) from above and below, and the tire (T) is rotated around the axis of the upper spindle (10) by rotation around the axis of the upper spindle (10). A tapered fitting part (16) is formed in the lower part of the spindle (10), and the tapered fitting part (16)
) is provided on the upper rim mounting plate (17) with a tapered fitting part (19) that is inserted and removed from below, and a chucked part (20) is provided in the upper center of the tapered fitting part (19) in an upwardly projecting shape. , in the upper spindle (10) and at the lower end the chuck (30
) is provided by inserting a rod (29) slidably in the axial direction so that a chuck (30) can grip and release a chucked portion (20), comprising: is provided with a lever drive device (38) that pulls up and pulls down the rod (29), and the lever drive device (38) is connected to a lever fulcrum (38) provided on the fixed side.
39), and a lever arm (41) supported by a lever fulcrum (39) of the mounting body (40).
and a cylinder body (42) that operates the lever arm (41) at the lever fulcrum (39), and one end of the lever arm (41) is mounted on the upper part of the rod (29) with a tapered roller bearing (43). ), and the cylinder body (42) is provided on the other end side of the lever arm 41, and the arm length (L1) between the cylinder body (42) and the lever fulcrum (39) is longer than the lever fulcrum (39). ) and rod (29
) A rim mounting device for a tire uniformity machine, characterized in that the arm length (L2) is longer than the arm length (L2) between the rim and the rim.