JPS6071237A - Clamper for tire - Google Patents

Abstract

PURPOSE:To reduce exchange time of rims in the size alteration of a tire by interposing a member deformable in expansion and shrinkage by an air pressure between the rotating shaft and upper and lower rims clamping the tire to facilitate the loading and unloading of both rims. CONSTITUTION:When the size of a tire T is altered, first, working screws 36 and 42 are loosened and plunger sections 45 and 46 of the working screws 36 and 42 are retracted to increase the capacity of pressure paths 35 and 41. The pressure in the pressure paths 35 and 41 lowers to reduce deformable shells 34 and 38 radially inward. As a result, the force pressing the shells 34 and 38 against the upper and lower rims 24 and 26 disappears and allow the upper and lower rims 24 and 26 to be removed from upper and lower rotating shafts 21 and 22. Then, the upper and lower rims 24 and 26 of a suitable size are fitted into rotating shafts 21 and 22 and the plunger sections 45 and 46 of the working screw 36 and 42 are advanced to raise the pressure in the pressure paths 35 and 41 so that the deformable shells 34 and 38 are expanded for mounting.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention provides a method for temporarily storing tires, for example for testing purposes.
The present invention relates to a gripping device.

Conventionally, rotating pairs located on the same axis are brought closer to each other,
As a tire gripping device that grips both bead portions of a tire by a pair of rims that are detachably attached to the rotating shaft, for example,
The one described in Japanese Patent No. 922 is known. This is applied to tire uniformity machines.The rim is attached to the rotating shaft using bolts, and the concentricity and perpendicularity of the rim to the rotating shaft are determined by the outer circumference of the rotating shaft and the inner circumference of the rim. This is ensured by forming conical surfaces that fit together. However, simply fitting these conical surfaces together and tightening the bolts requires high precision and perpendicularity, which greatly exceeds the limit error of the tire uniformity machine, and test measurement is impossible if it is not done as it is. It's not @ to do it. For this reason, after loosening the bolts, the bolts are repeatedly tightened while slightly displacing the rim position, so that the rim and rotating shaft are in the same position.
+a and orthogonality were adjusted until they reached a predetermined accuracy. This type of adjustment requires a great deal of effort and time, and must be performed every time the rim is replaced when changing tire speed, which significantly reduces work efficiency. There was a problem. In addition, in the case of tire uniformity manning, since high pressure air is fully injected into the tire after gripping the tire, an O-ring is required between the rotating shaft and the rim to seal this air. There is also a problem in that the above-mentioned adjustment work is required due to variations in the OIJ song collapse margin.

This invention was made by focusing on the above-mentioned problems.
In addition to reducing the time needed to replace rims due to tire size changes and improving work efficiency, this also eliminates the need for O-rings to seal the air in products that inject air into the gripped tires. The purpose is

This purpose is to create a tire in which a pair of rotating shafts located on the same axis are brought close to each other, and both bead portions of the tire are gripped by a pair of rims that are removably attached to each of these rotating shafts. In the gripping device, each of the rotating shafts has a bulge portion on the outer circumferential surface of which bulges uniformly outward in the radial direction due to fluid pressure, and at least one of the rotating shafts has a bulging portion that bulges radially outward uniformly due to fluid pressure, and at least one of the rotating shafts has a bulge that bulges the rim relative to the rotating shaft when the rim comes into contact with the rotating shaft. This can be achieved by having a holding surface that holds the rim on a vertical plane, and attaching the rim to the rotating shaft by fully expanding the bulge and pressing against the inner surface of the rim.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In Fig. 1, (1) is a lower main shaft whose axis of rotation is vertical, and this lower main shaft (1) is rotatably supported by a frame (not shown) of a testing and inspection machine such as a uniformity machine. ,ing. A lower main shaft (2) is provided below the lower main shaft (1) and coaxially with the lower main shaft (1), and the lower main shaft (2) is rotatably and movably supported by the frame. There is. An air passage m (31) is formed on the rotational axis of the lower main shaft (1). One end of this air passage (3) is connected to a high-pressure air source (not shown), and the other end is connected to a high-pressure air source (not shown). A holder (4) coaxial with the lower main shaft (1) is attached to the lower end of the lower main shaft (1) with a plurality of bolts (5). is a through hole (6) communicating with the air passage (3).
) is formed. This through hole (6) has a conical surface (7) that widens downward at the bottom of the sentence.

(8) is an upper ring plate fitted into the holder (4) and secured by bolts (9), and this upper ring plate (8) is in contact with the stepped surface α0) of the holder i (4). are in contact with each other. On the other hand, the lower main shaft (2) has an insertion part α1) in its upper part that is inserted into the through hole (6), and this insertion part (
Ll) outer periphery is the conical surface (12
) and 7. As a result, when the lower main shaft (2) rises and the insertion part Ql) is inserted into the through hole (6), the upper and lower main shafts (1) (2
) are accurately and easily coaxial. The insertion part (11)
has a blind hole (I3) whose upper end opens on the upper surface of the insertion portion (Ll).
) is formed, and an annular ring (14) is formed on the outer periphery of the insertion portion (1), that is, on the conical surface (12). The central portion of the blind hole (I3) and the annular groove σ4) communicate with each other through a plurality of communication holes (I5). A plurality of guide holes (I6) extending approximately in the radial direction are formed at the lower end of the halter (4), and the inner ends of these guide holes (10) are formed in an annular groove (14).
It opens in a conical surface (7) opposite to, and the outer end is described later.
The holder (4) is opened on the outer surface so as to communicate with the space between the lower rims. As a result, the insertion part
When inserted into the air passage (3), the air is supplied to the air passage (3) through the through hole (6), the blind hole (13), the communication hole←5), the annular groove (I4), and the guide hole (I6). Send it to the space between the upper and lower rims. A lower ring plate θ7) is fitted into the center of the lower main shaft (2), and this -F ring plate) (
+71 is attached to the lower main shaft (2) with a plurality of bolts (18) in contact with the step surface 99) of the lower stop (2). This lower ring plate α7) has a flat holding surface G? 0) k, this holding surface Do) is located on a vertical plane (P) perpendicular to the 0 rotation axis of the lower main shaft (2). As mentioned above, the main shaft (1), holder (4), and upper ring plate (8) as a whole form an upper rotating shaft! 21
+ Complete configuration, and the aforementioned lower spindle (2) and lower ring play) (17) are as a whole - (lower rotation axis C→f
lff1, and these upper and lower rotation axes C21) (E are located on the same axis and form a pair with each other.
The conical surfaces (7) (12) are the upper and lower rotation axes Ql)
A shaft alignment means e for aligning the shafts of Ba is constructed. B
Reference numeral 41 denotes an upper rim having a sleeve (C) at its inner end, and this upper rim (C) is fitted into and detachably attached to the holder (4) directly below the upper ring plate (8). on the other hand,
(26) is a lower rim having a sleeve Cη at the inner end;
This lower rim is fitted and removably attached to the lower main shaft (2) with its lower surface abutting the lower ring plate (17). At this time, the flat lower surface of the lower rim (26) is in full contact with the holding surface of the lower ring plate ([7), thereby holding the lower rim (26) on the vertical plane fPl. As shown in detail in FIG. 2, a stepped annular groove 01) is formed on the outer periphery of the holder (4) facing the sleeve 4 of the upper rim (24), and this annular groove 01) extends outward. The positioning groove (3 grooves and the narrow groove (33) located on the inner side)
It is composed of and. A metal cylindrical shell (34I) is housed and fixed in the groove 0';4, and this shell (34I is the narrow groove (33)'e) is closed to form a sealed space.(35) is a pressure passage formed in the holder (4), and one end of this pressure passage (35) is a narrow groove 03).
The other end is opened at the upper outer surface of the holder (4). The pressure passage (35) is filled with a pressure fluid such as oil, and an operating screw (36) is screwed into the other end. And this operating screw (36)? By screwing, the fluid pressure in the pressure passage (35) increases,
As a result, the outer circumferential surface of the shell (3) uniformly bulges outward in the radial direction. Therefore, in this embodiment, the shell (3) corresponds to the bulging part. When expanded outward, the outer circumferential surface of the shell 04) comes into pressure contact with the inner surface of the sleeve (c) of the upper rim 04). On the other hand, the sleeve of the lower rim 06)? As shown in Fig. 1, the lower main shaft (2) facing the force is also formed with a step +1 annular groove. and a narrow groove 6 as a closed space closed by the shell (to).
0). The pressure passage Uυ whose one end is open in this narrow groove 60) has its other end opened at the bottom of the blind hole (I3), and the operating screw ←no is screwed into the bottom of the blind hole α3). ing. Then, the pressure passage tll) is filled with a pressure fluid such as oil, and as the operating screw ←4 is screwed in, the outer peripheral surface of the shell 0 bulges outward in the radial direction, causing the sleeve (c) of the lower rim (c) to expand. C) Pressure-contact with the inner surface - At the positions facing each other on the lower surface of the upper rim (C) and the upper surface of the lower rim (261), rings whose bottom surfaces are parallel to the holding surface (20), are coaxial and have the same radius. shaped groove 63) H is the force,
Each is formed.

Next, the operation of one embodiment of the present invention will be described and explained.

First, when testing and inspecting tires of the same size, the lower rotating shaft located at the bottom dead center (lower rim 06) should be fully raised, that is, approaching the upper rotating shaft (21), and then rotated upward and downward. The lower rim Ω6) receives the tire α゛, which has already been carried horizontally between the shaft (21+(2)). When the lower rotating shaft and lower rim (26) further rise in this state, the insertion part 0.1) is inserted into the through hole (6), and the conical surface (7)
Due to the permanent stone action of (I2), both rotating shafts A become coaxial.

At this time, both bead parts (Bl (B+ is upper and lower rim planes) of the tire (T+) are gripped as shown by the imaginary lines in Fig. ) and (c) form a sealed space.Next, the air supplied from the high-pressure air source to the air passage (3) flows through the through hole (
6), blind hole (I3), communication hole 11, annular groove σ4), guiding hole (16) into the space 7, tire (T)
Adjust the internal pressure to the specified pressure.

In this state, tests and inspections are performed while rotating the tire (T1k), and when the tests and inspections are completed, the tire (T+) is removed by the reverse operation to that described above.

Next, when the size of the tire ('r) is changed, the rim is replaced with a rim corresponding to the changed tire size. In this case, first loosen the operating screw (36).
Plunger part fi5 of these operating screws (36+02)
) 66) to increase the volume of the pressure passage (35+61+).As a result, the pressure in the pressure passage (35) 61) decreases, and the deformable shell (34) (31) contracts in the radial direction. do.

As a result, the pressing force of the shell (341 (38)) against the upper and lower rims (24) and (26) is reduced, and the upper and lower rims 42
41 Ki) are removed from the upper and lower rotating shafts (21+ Ka).Then, these upper and lower rims (24) (26
) is an annular boxwood (17) formed on the lower surface of the lower rim 06).
)'t Grasp it with a U-shaped arm, etc. and carry it out. Next, fit the corresponding size lower rim (26)k onto the lower rotating shaft that has risen to the intermediate position, and place its lower surface on the lower ring plate 7.
) in contact with the holding surface (20). As a result, the lower rim 96) is rotated by the lower rotation axis (two rotations S + the vertical plane to the cliff (
P) is held on top, resulting in a high degree of orthogonality to the axis of rotation of the lower rim example. Next, after inserting the lower part of the ring-shaped jig 18) into the ring-shaped groove tL44) of the lower rim 06), the upper rim 06) is carried in to just above the lower rim (a6). Next, the upper rim (24) is lowered to insert the upper part of the jig into the ring-shaped groove 03 of the rim (24).

This ensures highly accurate parallelism between the lower rim (G) and the upper rim (24), in other words, the upper rim (C) and the upper rotating shaft (21).
) can be obtained with high precision orthogonality with the axis of rotation. Next, the lower rotating shaft ba, the upper and lower rims Q→, and the jig are raised together, that is, brought closer to the upper rotating shaft Kl), and the upper surface of the upper rim (upper rim) is brought into contact with the upper ring plate ( 8) Press against the bottom surface. Next, screw in the operating screw 06) and plunger part (1
5)' to reduce the volume of the pressure passage (35). As a result, the internal pressure of the pressure passage (35) increases, and the deformable shell (3) uniformly bulges outward in the radial direction as shown by the imaginary line in FIG. When the outer circumferential surface of ) comes into pressure contact with the circular surface of the sleeve portion of the upper rim (C), the upper rim (C) is gradually removably attached to the upper rotating shaft (21) only by frictional force. At this time, the upper rim () is made of aluminum and is lightweight, so it will not fall, and the shell (b) and sleeve (c) are in surface contact under high pressure, so a reliable seal is achieved. In addition, at this time, the outer circumferential surface of the shell (3 barrels) bulges out by the same amount at any point in the circumferential direction from the rotational axis of the upper rotating shaft (21) due to Pascal's principle. is attached to the upper rotating shaft (21) with high concentricity.Next,
The lower rotating shaft (c), lower rim (26), and jig 18Hr are lowered together to the bottom dead center. Next, when i'Af is screwed in properly, the shell bulges out evenly in the radial direction due to the same operation as described above, and the lower rim e (2) is aligned with the lower rotation axis with high precision concentricity. -Let me ask you about it. Next, jig 0
8) Remove it from the lower rim e6). In this way, the rim can be positioned with high concentricity around the rotating shaft simply by bulging outward in the radial direction of the shell.

In addition, in the above-mentioned embodiment, the lower rim (
26), jig-, and upper rim (24+?) have been set one after another, but in this invention, the lower rim (24+?
C), jig, upper rim) may all be set in advance and these may be fitted to the lower rotating shaft Ω4 all at once.

Also, in order to bulge the shell 0 → (g), the operating screw (
36) Although a decoy is used, a cylinder using a spring or the like may also be used. In addition, in the above-mentioned embodiment, the plunger portion 65) (4 parts) are advanced and the pressure passage (3) is moved forward.
The internal pressure of the pressure passage (11) was raised, but on the contrary, the plunger part was moved back by the spring and the pressure passage (35) was raised.
111) may be increased. In this case, when the operating screw is advanced, the shell (34) (g) is retracted.

As explained above, according to the present invention, it is possible to improve work efficiency by shortening the time required for replacing rims due to tire size changes, and it is also possible to improve work efficiency when all air is injected into the gripped tire. This eliminates the need for an O-ring for air sealing.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of the vicinity of the bulge. -...Holding surface However, rotation axis (c) e61... rim (b) (f)... bulge ('r)...・・・Tire (B)・・・・・・・・・
・Procedural amendment for the bead part (voluntary) l Indication of the case Patent Application No. 179776/1982 Name of the invention Tire gripping device 3 Person making the amendment Relationship to the case Patent applicant address 1-10 Kyobashi, Chuo-ku, Tokyo No. 1 name (52
7) Brideston Tire Co., Ltd. 4 Agent 160 Address: 7-13-5 Nishi-Shinjuku, Shinjuku-ku, Tokyo" is corrected to read "screw (36), screw." (2) From line 17 on page 11 to line 1 on page 12, it is written that ``When pressed, the shell (34) J.'' Sufficient gripping force is generated, and the upper rim (24) is attached to the upper rotating shaft (21).
It can be detachably attached to. At this time, the shell (34
) J. that's all

Claims (1)

[Claims] Knead by bringing the pair of rotating shafts located on the same axis close to each other,
In a tire gripping device in which both bead portions of a tire are gripped by a pair of rims that are removably attached to a rotating shaft, the outer peripheral surface of each rotating shaft is moved radially outward by fluid pressure. At least one of the rotating shafts has a holding surface that holds the rim on a plane perpendicular to the rotating shaft when the rim comes into contact with the rim, and the bulging part is bulged out. A tire gripping device characterized in that the rim is brought into pressure contact with the inner surface of the rim so that the rim can be picked up on the rotating shaft.