JPH0518865A - Tire chucking device of tire measuring apparatus - Google Patents

Abstract

PURPOSE:To easily alter different rim widths within a short time by reducing the set number of upper and lower rims. CONSTITUTION:A tire 1 is held between the lower rim 3 on the side of the lower mount 11 externally fitted to a post 8 in a freely rotatable manner and the upper rim 2 on the side of a freely rising and falling advance or retreat shaft 6. The lower rim 3 is externally fitted to the lower mount 11 in a freely rising and falling state and two spacer rings 27, 28 are externally fitted to the outer periphery of the lower mount 11 between the lower end part of the lower mount 11 and the lower rim 3 in a freely revolvable and vertically movable manner. Upper protrusions 20, 31 capable of coming into contact with lower protrusions 29, 26 and capable of being inserted in the gaps between the lower protrusions 29, 26 are provided to the spacer rings 27, 28. The chuck means 40 grasping the spacer rings 27, 28 to allow them to rise and fall is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire chucking device for a tire measuring device.

[0002]

2. Description of the Related Art When measuring a tire uniformity ratio of an automobile or the like with a tire measuring device, the tire is clamped from above and below by the upper and lower rims of a tire chucking device, and the tire is rotated about its vertical axis in the clamped state. Let's do it. The tire chucking device used for this type of tire measuring device is
As disclosed in Japanese Patent Publication No. 55-44194, a tire is sandwiched from above and below by a lower rim on a lower mount side that is rotatably fitted on a fixed post on a pedestal and an upper rim on a forward / backward shaft side that can be raised and lowered. It is supposed to do.

There are various sizes of large tires for trucks and buses. Depending on the tire size, the rim size,
The bead diameter and rim width of the rim are defined by standards. Therefore, when measuring tires of different sizes, it is necessary to replace the upper and lower rims as one set. This set of upper and lower rims for trucks and buses weighs 130 to 200 kg and cannot be replaced manually. Therefore, in the case of large tires for trucks and buses, an exchange assisting device is used, and this exchange assisting device is used to mount the upper and lower rims while carrying in and out.
The method of replacing the lower rim is adopted.

[0004]

When using the conventional replacement assisting device, it is necessary to prepare several sets of upper and lower rims, and the replacement cycle becomes long. The present invention has been made in view of the above problems, and an object thereof is to provide a tire chucking device capable of reducing the number of sets of upper and lower rims and shortening a replacement cycle.

[0005]

According to the present invention, a lower rim 3 on a lower mount 11 side rotatably fitted on a post 8 and
In a tire chucking device of a tire measuring device in which a tire 1 is clamped by an upper rim 2 on the side of a shaft 6 that can be raised and lowered, a lower rim 3 is fitted onto a lower mount 11 so that the tire can be moved up and down. At least one spacer ring 27, 28 is rotatably and vertically movable around the outer periphery of the lower mount 11 between the lower end of the lower ring 11 and the lower rim 3, and the spacer ring 27, 28 is attached to the lower ring. Lower protrusion 29,2
6 is provided with upper projections 30 and 31 which can be abutted on the upper surface and which can be fitted between the lower projections 29 and 26, and chuck means 40 for gripping and moving up and down the spacer rings 27 and 28.

[0006]

[Operation] Between the lower rim 3 and the lower end of the lower mount 11, the upper protrusions 30, 31 on the side of at least one spacer ring 27, 28 fitted on the lower mount 11 are the lower protrusions 2 on the lower side.
The upper and lower positions of the spacer rings 27, 28 change depending on whether they are in contact with each other on the upper surface of the lower protrusions 29 or 26 or between the lower protrusions 29 and 26, that is, the rim width, that is, the rim width. Can be changed. Therefore, if the rim diameter is the same, the upper and lower rims
2,3 can be used as it is, only when the rim diameter is different,
By replacing the upper and lower rims 2 and 3 with another one, the number of sets of the upper and lower rims 2 and 3 can be reduced.

When changing the rim width, the chuck means 40 is used.
After gripping the spacer rings 27, 28 with the lower rim 3 and lifting them, the lower mount 11 side is rotated to an angle at which the upper and lower protrusions 30, 31, 29, 26 abut or fit, and then the chuck means. 40 with spacer rings 27, 28 and lower rim
3 should be lowered. Therefore, it is easy to change the rim width and the conversion cycle becomes short.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. In FIGS. 1 to 3, reference numeral 1 denotes a tire to be measured, which is sandwiched between an upper rim 2 and a lower rim 3 from above and below. Moreover, it is rotationally driven around the vertical axis center by the power from the lower rim 3 side. The upper rim 2 has an engaging edge 4 which engages with the inner peripheral edge of the upper side of the tire 1, and is detachably fitted and fixed to the outer periphery of the lower end portion of the upper mount 5. Top mount
5 is attached to the lower end of the forward / backward moving shaft 6.

Reference numeral 7 is a fixed base, 8 is a hollow post fixed on the base 7, and a lower mount 11 is rotatably fitted on the post 8 via a pair of upper and lower roller bearings 9 and 10. There is. A chuck body 12 is attached to the upper end of the lower mount 11, and an engaging claw 13 that can freely move in and out in the radial direction and a conical wedge for moving the engaging claw 13 up and down by vertical movement are attached to the chuck body 12. 14 and are incorporated.

The wedge 14 is fixed to the upper end of the spindle shaft 15, and the spindle shaft 15 has a spline portion which is spline-coupled to the chuck body 12 so as to be vertically movable. The wedge shaft 14 projects to the lower end side of the mount 7 through the post 8. It is set up. The spindle shaft 15 is interlockingly connected to a rotary drive motor 19 via a timing pulley 16, a timing belt 17, and a timing pulley 18 at the lower end of the spindle shaft 15, and is rotationally driven by the motor 19. The motor 19 is provided with a rotary encoder 20 for detecting the rotation angle.

When the advancing / retreating shaft 6 descends, the chuck body 12 is fitted into the fitting hole 21 of the upper mount 5 so as to be freely removable from the lower side.
Fitting hole 21 of lower mount 11 when fitted to 11
Can be engaged with the stepped portion 22 formed on the. Chuck body 12
At the upper end of the stopper 23 that restricts the upper limit of the wedge 14
Are attached via a lid plate 24.

The lower rim 3 has an engaging edge 25 that engages with the lower inner peripheral edge of the tire 1, and is fitted onto the outer periphery of the lower mount 11 so as to be rotatable and vertically movable. On the outer periphery of the lower end of the lower mount 11, as shown in FIGS. 4, 5, and 7,
Four lower protrusions 26 are formed in the circumferential direction, and two upper and lower spacer rings 27 and 28 are vertically rotated around the outer periphery of the lower mount 11 between the lower protrusion 26 and the lower rim 3. It is fitted freely.

As shown in FIGS. 4 and 7, four lower projections 29 are formed on the upper portion of the lower spacer ring 28 so as to project upward in the circumferential direction. Upper / lower spacer ring
Four upper protrusions 30 and 31 are formed in the lower part of 27 and 28 so as to project downward in the circumferential direction. Lower protrusion 26,29,
The upper protrusions 30 and 31 are divided into eight equal parts in the circumferential direction and are provided at equal intervals so as to cover the range of 45 degrees. Therefore, the upper protrusions 30 and 31 of each spacer ring 27 and 28 can abut on the lower protrusions 29 and 26, and can be fitted between each pair of adjacent lower protrusions 29 and 26.

As shown in FIG. 4, the upper spacer ring 27 is provided with circumferential ridges 32 and 33 at both upper and lower ends thereof, and the lower spacer ring 28 is provided with a circumferential ridge 34 at its upper and lower intermediate portions.
Are formed. In addition, each protrusion of the lower spacer ring 28
Round bar-shaped engaging parts 35 and 36 are provided in the radial direction at 29 and 31,
On the other hand, the lower protrusion 26 of the lower mount 11 and the upper spacer ring
In the upper protrusion 30 of 27 and the concave portion between them, the engaging portions 35, 36
Engaging recesses 37, 38, 39 that can be engaged and disengaged are formed.

Reference numeral 40 denotes a chucking means for gripping the upper and lower spacer rings 27, 28, which is provided with a pair of chucking members 41 formed in a split shape as shown in FIG.
In the upper and lower spacer rings 27, 28, three fitting grooves 42 are formed vertically so that they can be fitted into and removed from the projections 32, 33, 34 of the upper and lower spacer rings 27, 28.
It is slidably supported in the radial direction on each chuck mounting base 43 via a support plate 44 and the like, and can be opened and closed by an opening / closing cylinder 46 mounted on a bracket 45 on the chuck mounting base 43.

A hole 47 into which the lower mount 11 and the like are loosely fitted is formed in the center of the chuck mounting base 43, and screw chucks 48 arranged at four corners and two guide rods 49 move up and down on the loading base 7. It is supported freely. The screw jack 48 has a guide cylinder 51 attached to the gantry 7 via a gear case 50, and a screw shaft 52 which is vertically movably inserted into the guide cylinder 51 and whose upper end is connected to the chuck mounting base 43. A worm mechanism driven by the transmission shaft 53 is engaged with the screw shaft 52 in the gear case 50.
The transmission shaft 53 is provided so as to extend over the two sets of gear cases 50, and one end of the transmission shaft 53 is interlocked with the lifting motor 53 via the gear case 51 on the frame, the interlocking shaft 52, and the like.

According to the above configuration, since the upper and lower spacer rings 27, 28 are provided between the lower rim 3 and the lower protrusion 26 at the lower end of the lower mount 11, the spacer rings 27, 2 are provided.
By selecting the contact state in which the upper protrusions 30 and 31 of 8 contact the lower lower protrusions 29 and 26 and the fitted state in which the upper protrusions 30 and 31 are fitted between the lower protrusions 29 and 26, The position changes, and the vertical position of the lower rim 3 changes in four steps. Therefore, the vertical position of the lower rim 3 can be adjusted in four steps, and when the rim diameter is the same, the interval between the upper and lower rims 2, 3, that is, the rim width can be changed in four steps.

For example, as shown in FIG. 7A, each upper protrusion
When 30 and 31 are brought into contact with the lower protrusions 29 and 26, the lower rim 3 is located at the uppermost position as shown by the solid line on the left side of Fig. 1, and the distance between the upper and lower rims 2 and 3 is the minimum. It becomes a. See also FIG.
As shown in B of Fig. 1, when the upper and lower protrusions 31 and 26 are brought into contact with each other vertically and the upper and lower protrusions 30 and 29 are fitted, the lower rim 3 is located at the intermediate position as shown by the chain double-dashed line on the right side of FIG. Next, above
The space between the lower rims 2, 3 has an intermediate rim width b.

Further, as shown in FIG. 7C, upper and lower protrusions
If 30, 31, 29, and 26 are fitted together, the lower rim 3 is located at the lowest position as shown by the solid line on the right side of FIG. 1, and the upper and lower rims 2,
The distance between 3 is the maximum rim width C. To change the rim width, proceed as follows. For example, when changing from the state shown in FIG. 7A to the state shown in FIG. 7B,
First, operate the screw jack 48 to move the chuck mount.
Raise 43. Then, when the chuck mounting base 43 rises to a position where the chuck member 41 corresponds to the upper spacer ring 27, the chuck member 41 is then operated in the closing direction by the opening / closing cylinder 46, and the upper spacer ring 27 is inserted into the fitting groove 42. Of 2
The projections 32, 33 of the book are fitted together, and the upper spacer ring 27 is gripped by the pair of chuck members 41.

Subsequently, the chuck mounting base 43 is raised by the screw jack 48, the upper spacer ring 27 and the lower rim 3 are raised, and the timing gears 16, 1 are driven by the motor 19.
8. The spindle shaft 15 is rotated by 45 degrees via the timing belt 17. Then, the lower mount 11 and the lower spacer ring 28 rotate 45 degrees around the post 8 via the spindle shaft 15 and the chuck mounting base 43.After that, the chuck mounting base 43 is lowered by the screw jack 48 and the upper spacer ring 27 upper part is rotated. The projection 30 is fitted between the lower projections 29 of the lower spacer ring 28, and the chuck member 41 is opened by the opening / closing cylinder 46 to release the grip of the upper spacer ring 27. As a result, the state shown in FIG. 7B can be changed.

FIG. 8 shows another embodiment of the present invention, and illustrates the case where the chuck means 40 of the air bag type is used. The air bag 54 is provided inside the annular frame 55 on the chuck mount 43 and is arranged between the upper and lower ring plates 56, 57 of the frame 55. The air bag 54 has an elastic belt 58 inside, and when the air is put inside, the air bag 54 can hold the spacer rings 27, 28 via the belt 58. In addition, the chuck mounting base 43 is mounted on the base 7 with a guide rod 60 fixed by a bracket 59 and a guide cylinder 61.
It is supported so that it can move up and down. Even in this case, the spacer rings 27 and 28 can be gripped by the chucking means 40 as described above.

[0022]

According to the present invention, the lower rim 3 is fitted onto the lower mount 11 so as to be lifted and lowered.
At least one spacer ring 27, 28 is rotatably and vertically movable around the outer periphery of the lower mount 11 between the lower end of the lower ring 11 and the lower rim 3, and the spacer ring 27, 28 is attached to the lower ring. Provide the upper protrusions 30 and 31 that can be abutted on the lower protrusions 29 and 26 and can be fitted between the lower protrusions 29 and 26, and
Since the chuck means 40 for gripping and ascending and descending the 7,28 is provided, there is an advantage that the number of sets of the upper and lower rims 2 and 3 can be reduced and the replacement cycle can be shortened.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a cutaway side view of the same portion.

FIG. 3 is a plan view of a fractured surface of the same portion.

FIG. 4 is a perspective view of the spacer ring portion.

FIG. 5 is a cross-sectional plan view of the lower mount.

FIG. 6 is a plan view of the chuck means.

FIG. 7 is an explanatory diagram of the same operation.

FIG. 8 is a sectional side view of the same portion.

[Explanation of symbols]

 1 Tire 2 Upper rim 3 Lower rim 6 Advance / retreat shaft 8 Post 11 Lower mount 12 Chuck body 26 Lower protrusion 27 Spacer ring 28 Spacer ring 29 Lower protrusion 30 Upper protrusion 31 Upper protrusion 40 Chuck means 41 Chuck member 46 Open / close cylinder 48 Screw jack 54 Air bag

Claims (1)

Claims: 1. A lower rim (3) on the lower mount (11) side rotatably fitted on a post (8) and a forward / backward movable shaft.
In the tire chucking device of the tire measuring device in which the tire (1) is sandwiched by the upper rim (2) on the (6) side, the lower rim (3) is vertically fitted onto the lower mount (11). Along with the lower end of the lower mount (11) and the lower rim (3), at least one spacer ring (27) (28) is rotatably and vertically movable around the lower mount (11).
Fit the spacer ring (27) (28) to the lower protrusion.
Upper protrusions (30) and (31) that can be abutted on (29) and (26) and can be fitted between lower protrusions (29) and (26) are provided, and spacer rings (27)
A tire chucking device for a tire measuring device, which is provided with a chuck means (40) for gripping and ascending / descending 8).