JP3221736B2 - Tire vulcanizing press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire vulcanizing press for vertically moving an upper mold mounting member to which an upper mold is fixed with respect to a lower mold mounting member to which a lower mold is fixed. The present invention relates to a device that can adjust a gap amount with a member in a stepless manner and can reliably maintain a state after the adjustment.

[0002]

2. Description of the Related Art In a tire vulcanizing press of the type in which an upper mold mounting member to which an upper mold is fixed is vertically moved with respect to a lower mold mounting member to which a lower mold is fixed, the upper mold mounting member is provided on a side portion of the upper mold mounting member. The upper roller is vertically moved up and down by the rollers running in contact with the track member attached to the side frame. In this case, if the amount of clearance between the roller and the track member is not appropriate, the elevation accuracy of the upper mold mounting member cannot be maintained, which causes a defective tire. Therefore, conventionally, the roller is attached to a cylindrical member having an axis eccentric to the axis of the roller, and the cylindrical member is rotated in a cylindrical hole provided on a side portion of the upper mold mounting member, so that the roller is eccentric. The roller is moved toward the track member by a dimension determined by the amount and the rotation angle, so that the gap between the roller and the track member can be adjusted. After the adjustment is completed, the cylindrical member is fixed by, for example, pressing a stopper plate provided on the side of the cylindrical member opposite to the roller against the side of the upper mold mounting member.

[0003]

In the tire vulcanizing press described in the prior art, after the cylindrical member is rotated to adjust the gap between the roller and the track member, the stopper plate is moved to the side of the upper mold mounting member. However, when the cylindrical member is fixed by pressing, the cylindrical member is rotated by an external force because the fixing force is insufficient, and the axial center of the roller is shifted. Sometimes. Therefore, a plurality of holes are provided on the side of the upper mold mounting member that abuts against the stopper plate, and the holes are communicated with the through holes provided in the stopper plate, and a pin is inserted into the communicating hole. In order to prevent the rotation of the cylindrical member by inserting the pin, the amount of clearance between the roller and the track member is adjusted stepwise, and the adjustment is performed steplessly. There is a problem that can not be.

The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to adjust the amount of clearance between a roller and a track member steplessly, and It is an object of the present invention to provide a tire vulcanizing press capable of reliably maintaining the adjusted state.

[0005]

In order to solve the above-mentioned object, a tire vulcanizing press of the present invention has a guide device provided between a side portion of an upper mold mounting member to which an upper mold is fixed and a side frame. In the tire vulcanizing press in which the upper mold mounting member is vertically movable up and down with respect to the lower mold mounting member to which the lower mold is fixed by running the guide device, the guide device includes a track attached to a side frame. Components,
A moving member attached to a side of the upper mold mounting member, wherein the moving member includes a tapered shaft fitted into a tapered hole provided in a side of the upper mold mounting member, and an axis of the tapered shaft. Is provided with a roller having an eccentric shaft center and running in contact with the track member, and a tightening portion for tightening the tapered shaft portion into the tapered hole.

[0006]

The taper shaft is freely rotatable in the tapered hole in a stepless manner. By tightening the tightening portion at each position, the tapered shaft and the tapered hole are tapered into each other, and the tapered shaft is securely inserted into the tapered hole. , The gap between the roller and the track member having an axis decentered from the axis of the tapered shaft can be adjusted steplessly, and the adjusted state can be reliably maintained. .

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a tire vulcanizing press of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG.

Referring to FIG. 1, the press frame of the tire vulcanizing press comprises an upper frame 1, a lower frame 2 and a side frame 3, and the lower frame 2 is connected to a lower mold 5 via a lower mold mounting member 4. Has been fixed. An upper mold 6 that can be opened and closed by the lower mold 5 is fixed to an upper mold mounting member 7. The upper mold mounting member 7 includes a piston rod of an elevating cylinder 8 provided on the side of the upper frame 1. The end of 9 is fixed. A pressure transmission rod 12 is erected on the upper mold mounting member 7, and an upper portion of the pressure transmission rod 12 is inserted into a hollow pressure cylinder 13 fixed to the upper frame 1. .

Then, the side portion 7a of the upper mold mounting member 7
A guide device 21 is provided between the side frame 3 and the side frame 3. The guide device 21 includes a track member 22 attached to the side frame 3 as shown in FIGS.
The moving member 23 is attached to the side 7a of the upper mold mounting member 7 so as to surround the track member 22 from three directions. The moving member 23 includes a shaft 31, a nut 32, and a roller 33. It is configured.

The shaft 31 has a cylindrical shaft portion 35, a tapered shaft portion 36, a screw shaft portion 37, a square shaft portion 38, and a roller shaft portion 39. The cylindrical shaft portion 35, the tapered shaft portion 36, and the screw shaft portion 37 are provided. And the shaft 38 is concentric with the shaft 31, but the shaft 42 of the roller shaft 39 is eccentric from the shaft 41 of the shaft 31 by t. The cylindrical shaft portion 35 and the tapered shaft portion 36 of the shaft 31 are fitted into a through hole 47 formed by a cylindrical hole 45 and a tapered hole 46 provided in the side portion 7a of the upper mold mounting member 7, and the screw shaft portion 37 is provided. Has a screw portion 37a that meshes with the screw portion 32a of the nut 32. The roller 3 is provided with a bolt 51 and a plate 52 on the roller shaft 39.
The upper mold mounting member 7 is vertically movable with respect to the lower mold mounting member 4 by the rollers 33 abutting and running on the track member 22. The square shaft 38 has a prismatic shape.
Is rotated with a spanner or the like, the shaft 31 also rotates. At this time, since the axis 42 of the roller shaft 39 is eccentric with the axis 41 of the shaft 31, the roller shaft 3
The axis 42 of the shaft 9 rotates about the axis 41 of the shaft 31, and the gap ε between the roller 33 and the track member 22 varies. When the nut 32 is tightened at an arbitrary position where the shaft 31 rotates, the taper shaft portion 36
The shaft 31 is fixed in the through hole 47 by the taper fitting between the shaft 31 and the tapered hole 46. The nut 32 is a double nut, so that the shaft 31 can be securely fixed.

Next, the operation of the above tire vulcanizing press will be described. First, the vulcanization operation will be described. The upper mold mounting member 7 is raised by reducing the piston rod 9 of the lifting cylinder 8, and the upper mold 6 is raised. Then, the green tire is charged and set in the lower mold 5. Then, the upper mold mounting member 7 is lowered by extending the piston rod 9 of the elevating cylinder 8, and the upper mold 6 is lowered to close the two molds 5, 6. Then, by operating the hollow pressure cylinder 13, the pressing force is transmitted to the pressure transmission rod 12 to perform mold clamping pressure. When the mold clamping pressure is completed, the piston rod 9 of the lifting cylinder 8
Is reduced to raise the upper mold mounting member 7. Then, the vulcanizing operation is completed by discharging the vulcanized tire outside the machine, and a new green tire is placed in the lower mold 5.
Then, the next vulcanization operation is started, and the upper mold mounting member 7 in this vulcanization operation is moved up and down by the rollers 33 abutting and running on the track member 22.

The operation of adjusting the clearance between the roller and the track member will be described. The nut 32 is loosened to release the engagement between the tapered shaft portion 36 and the tapered hole 46. When the shaft 31 is rotated by rotating the square shaft 38 with a wrench or the like, the center of rotation is maintained because the cylindrical shaft 35 rotates in the cylindrical hole 45, but the axis 42 of the roller shaft 39 is Since it is eccentric with the axis 41 of the shaft 31, the axis 4 of the roller shaft 39
2 rotates about the axis 41 of the shaft 31 as a center, and the roller 33 is a track member having a dimension determined by the amount of eccentricity t of the axis 42 of the roller shaft 39 with respect to the axis 41 of the shaft 31 and the rotation angle of the roller shaft 39. 3 (when the roller 33 is in the upper right state in FIG. 3, when the shaft 31 is rotated in the direction C, the roller 33 approaches the track member 22, and when the shaft 33 is rotated in the direction D, the roller 33 Away from the member 22). When the clearance ε between the roller 33 and the track member 22 becomes appropriate, the nut 32 is tightened at that position. Thereby, the tapered shaft portion 36 and the tapered hole 4
By the taper fitting with 6, the shaft 31 is securely fixed in the through hole 47, and the adjustment operation ends.

As described above, the tapered shaft portion 36 has the tapered hole 4
The tapered shaft portion 36 and the tapered hole 46 are taperedly fitted by tightening the nut 32 at each position, so that the tapered shaft portion 36 is securely fixed in the tapered hole 46. Is done. For this reason, the shaft 3
A roller 33 having an eccentric shaft 42 with respect to one shaft 41
Adjustment of the gap ε between the roller 33 and the track member 22 can be performed in a stepless manner, and the axial position of the roller 33 after this adjustment can be prevented from slipping due to external force or the like. . As a result, the gap amount ε between the roller 33 and the track member 22 is set to an appropriate value, and the gap amount ε can be reliably maintained, so that the elevation accuracy of the upper mold mounting member 7 can be maintained, and Quality vulcanization results can be obtained.

In the above-described embodiment, the rotation center of the shaft is maintained by rotating the cylindrical shaft in the cylindrical hole. However, the rotation of the tapered shaft in the tapered hole is changed by the rotation of the shaft. If the center can be reliably maintained, the cylindrical shaft portion and the cylindrical hole become unnecessary. Also,
In the above embodiment, a tire vulcanizing press of a type in which one vulcanizing mold is installed on a press frame has been described.
The present invention can be similarly applied to a type in which a plurality of vulcanizing dies are installed on a press frame, and has the same effects as those of the above embodiment. If the taper angle is made smaller,
Although the effect of preventing loosening due to external force is great, a large axial force is required to disengage the taper when adjusting the gap between the rail and the roller. Therefore, it is preferable to use No. 40, No. 50 and No. 60 of the national taper used for the tool holder of the machine tool.

In the above embodiment, the tire vulcanizing press of the type in which the upper die is vertically moved up and down with respect to the lower die, the pressure transmitting rod erected on the upper mold mounting member and the upper frame are mounted on the upper frame. The tire vulcanizing press that transmits the pressing force by the fixed hollow pressurizing cylinder and performs the clamping press of the upper and lower dies has been described, but the pressure transmitting rod that can advance and retreat on the upper mold mounting member A dome that presses the upper and lower molds by pressing the upper and lower molds by transmitting the pressing force by a solid pressurizing cylinder fixed to the frame, and a dome that presses the upper and lower molds within the openable upper and lower dome. The same applies to the case of the lock type, and the same effects as in the above embodiment can be obtained.

[0016]

The present invention is configured as described above, and has the following effects. The tapered shaft can be freely rotated in the tapered hole in a stepless manner. By tightening the tightening part at each position, the tapered shaft and the tapered hole are tapered, so the tapered shaft can be securely inserted into the tapered hole. Fixed to Therefore, the gap between the roller having the eccentric axis and the track member with respect to the axis of the tapered shaft portion can be adjusted steplessly, and the axial position of the roller after the adjustment can be adjusted. Can be prevented from slipping due to external force or the like. As a result, the gap amount between the roller and the raceway member is made appropriate, and the gap amount can be reliably maintained, so that it is possible to maintain the elevation accuracy of the upper mold mounting member, and obtain a high-quality vulcanization result. Can be obtained.

[Brief description of the drawings]

FIG. 1 is a view showing a tire vulcanizing press of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a view as seen in the direction of arrow B in FIG. 2;

[Explanation of symbols]

 Reference Signs List 3 side frame 4 lower mold attachment member 5 lower mold 6 upper mold 7 upper mold attachment member 7a side portion of upper mold attachment member 21 guide device 22 track member 23 moving member 31 shaft 32 nut (tightening portion) 33 roller 35 Cylindrical shaft part 36 Tapered shaft part 37 Screw shaft part (tightening part) 45 Cylindrical hole 46 Tapered hole

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B29C 33/02 B29C 33/22 B29C 35/02

Claims (1)

(57) [Claims] 1. A lower mold in which a guide device is arranged between a side portion of an upper mold mounting member to which an upper mold is fixed and a side frame, and the upper mold mounting member is fixed to a lower mold by running of the guide device. In a tire vulcanizing press capable of vertically moving vertically with respect to the mounting member, the guide device includes a track member mounted on a side frame, and a moving member mounted on a side of the upper mold mounting member, The moving member has a tapered shaft portion fitted into a tapered hole provided on a side portion of the upper mold mounting member, and has a shaft center decentered from the taper shaft portion and travels on the track member in contact. A tire vulcanizing press comprising: a roller; and a tightening portion for tightening a tapered shaft portion into a tapered hole.