JP2013220558A - Rotary driving device for molding drum - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary driving device for a molding drum, allowing assembly work to be performed accurately in a short time.SOLUTION: A rotary driving device 1 for a molding drum includes a driving shaft part 2 coupled with a rotation shaft of the molding drum, a driving part 3 for driving to rotate the driving shaft part 2, a pair of bearing parts 4 and 5 disposed on both sides of the driving shaft part 2 for rotatably pivoting the driving shaft 2, and a mounting frame 10 for supporting the bearing parts 4 and 5. The mounting frame 10 has a bottom plate part 11, a support plate part 12 for supporting the bearing part 4, a support plate part 13 for supporting the bearing part 5, as well as a pair of reinforcing plate parts 14 and 15 placed between the support plate parts 12 and 13, which are integrally formed.

Description

    The present invention relates to a rotational drive device such as a molding drum in a tire molding machine.

  In the tire molding machine, a process is performed in which a tire constituent member is wound around a forming drum and the tire constituent members thus wound are pressure-bonded to form a tire. The molding drum is driven to rotate by a rotation drive device such as a motor. In order to wind the tire constituent member with high accuracy, it is necessary to perform rotation control such as rotation start and stop of the molding drum with high accuracy. . Therefore, in Patent Document 1, rotation control is performed with high accuracy by using a direct drive motor for the rotation drive device.

  FIG. 5 is an external perspective view of such a rotary drive device. The forming drum 100 is connected to a drive shaft portion 101 of a rotation drive device 102, and the rotation drive device 102 includes a drive motor 103 that is a direct drive type motor. A drive shaft 101 penetrates inside the drive motor 103, and the penetrated drive shaft 101 is pivotally supported by bearings 104 and 105 on both sides of the drive motor 103. The drive motor 103 and the bearing portions 104 and 105 are placed on the upper surface of the support base 106. The drive motor 103 is positioned and fixed by bolts 107, and the bearing portions 104 and 105 are positioned and fixed by bolts 108 and 109, respectively. In the molding drum 100, the rotation of the drive motor 103 is transmitted by connecting a flange 110 attached to the tip of the rotation shaft and a flange 111 attached to the tip of the drive shaft 101 with a bolt or the like.

  When maintaining the rotary drive device configured as described above, the flanges 110 and 111 are disconnected, and the drive motor 103 and the bearing portions 104 and 105 are removed from the support base 106. Then, by removing the drive shaft portion 101 from the bearing portions 104 and 105 and disassembling, maintenance work such as component replacement is performed. Although the assembly work is performed after the maintenance work is completed, the drive motor 103 and the bearings 104 and 105 are separately attached and fixed to the support base 106, so that the drive shaft 101 and the rotating shaft of the forming drum 100 are fixed. The centering operation for connecting the shafts must be adjusted separately for the bearing portions 104 and 105 that support the drive shaft 101, and requires skill to perform the centering operation with high accuracy.

  Further, it is necessary to adjust the position of the molding drum 100 so as to coincide with the height of the conveyor that conveys the tire constituent members. Therefore, if the position of the drive shaft 101 connected to the molding drum 100 is adjusted, the bearing The parts 104 and 105 had to be adjusted separately, and it took a long time to assemble the rotary drive device, resulting in a decrease in productivity.

JP-A-8-323888

  Accordingly, an object of the present invention is to provide a rotation driving device for a forming drum capable of performing assembly work with high accuracy in a short time.

  A molding drum rotation drive device according to the present invention is disposed on a drive shaft portion coupled to a rotation shaft of a molding drum, a drive portion that rotationally drives the drive shaft portion, and both axial sides of the drive shaft portion. And a pair of bearing portions that rotatably support the drive shaft portion, and a mounting frame integrally formed with a pair of support portions that respectively support the bearing portions.

  Since the present invention has the above-described configuration, the assembling work can be accurately performed in a short time.

It is an external appearance perspective view regarding embodiment which concerns on this invention. It is an external appearance perspective view which shows the state which removed the drive motor and deceleration mechanism of the drive part. It is AA sectional drawing cut | disconnected in the horizontal direction along the central axis of the drive-shaft part shown in FIG. FIG. 3 is a cross-sectional view taken along the line B-B cut in the vertical direction along the central axis of the drive shaft portion shown in FIG. 2. It is an external appearance perspective view regarding the rotational drive apparatus of the conventional molding drum.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an external perspective view of an embodiment according to the present invention. The rotational drive device 1 includes a drive unit 3 that rotationally drives the drive shaft unit 2, and the drive shaft unit 2 is supported by attachment frames 10 on both sides in the axial direction. The drive unit 3 includes a drive motor 3a, a speed reduction mechanism 3b connected to the drive motor 3a, and a rotor 3c connected to the speed reduction mechanism 3b. As will be described later, the speed reduction mechanism 3b is fixed to the mounting frame 10 side, and the drive motor 3a is supported by the speed reduction mechanism 3b. The rotor 3c has the drive shaft portion 2 penetrating inside, and is fastened and fixed around the drive shaft portion 2. Therefore, when the drive motor 3a is rotationally driven, the roller 3c is rotated via the speed reduction mechanism 3b, whereby the drive shaft portion 2 is rotated, and a molding drum (not shown) connected thereto is rotated.

  FIG. 2 is an external perspective view showing a state where the drive motor 3a and the speed reduction mechanism 3b of the drive unit 3 are removed. 3 is a cross-sectional view taken along the line AA in the horizontal direction along the central axis O of the drive shaft portion 2 shown in FIG. 2, and FIG. 4 shows the central axis O of the drive shaft portion 2 shown in FIG. It is BB sectional drawing cut | disconnected in the perpendicular direction along. Both sides in the axial direction of the drive shaft 2 are supported by bearings 4 and 5, and a flange 6 is attached to the end of the drive shaft 2 on the bearing 4 side. A fitting convex portion 7 is formed at the center portion of the flange 6, and the flange 6 and the fitting convex portion 7 are overlapped with a flange and a fitting concave portion provided on a rotating shaft of a molding drum (not shown). The drive shaft 2 and the rotating shaft of the forming drum are connected by being fixed by, for example. The bearing portion 5 is provided with a cylindrical outer cylinder portion 8, and the drive shaft portion 2 penetrates the outer cylinder portion 8 in a freely rotatable manner. The speed reduction mechanism 3b of the drive unit 3 is fixed to the outer periphery of the outer cylinder portion 8 to be a fixed side, and the rotor 3c of the drive unit 3 is fastened to the drive shaft portion 2 to be a rotation side.

  In FIG. 3, the mounting frame 10 includes a bottom plate portion 11, a pair of support plate portions 12 and 13 that are support portions of the bearing portions 4 and 5, and a pair of reinforcing plate portions ( (Or side frames) 14 and 15, and each part is integrally formed. Here, “integral formation” means that the mounting frame 10 is integrated so that there is no displacement even when a load is applied. For example, the entire mounting frame 10 is resin-processed. An integrally formed mounting frame can be obtained by integral molding. The bottom plate portion 11 is formed in a substantially rectangular shape in plan view, and the support plate portions (or front and rear frames) 12 and 13 are erected on the upper surface of the bottom plate portion 11 with a predetermined interval in the direction of the central axis O. Yes. A pair of fixing parts 11a and 11b are provided at positions symmetrical to the central axis O on the side part of the bottom plate part 11 on the support plate part 12 side, and the fixing parts 11a and 11b are in the direction of the central axis O. Protruding.

  A pair of fixing portions 11c and 11d are provided at positions symmetrical with respect to the central axis O on the side portion on the support plate portion 13 side, and the fixing portions 11c and 11d protrude in a direction orthogonal to the central axis O. ing. Each of the fixing portions 11a to 11d is formed with a screw hole for positioning, and the mounting frame 10 is fixed by mounting the bottom plate portion 11 on a base (not shown) and fixing the fixing portions 11a to 11d with screws. Positioned and fixed to the base.

  The support plate portions 12 and 13 are arranged so as to be parallel to each other in a direction orthogonal to the central axis O. A mounting hole for mounting and fixing the bearing portion 4 is formed in the support plate portion 12, and a mounting hole for mounting and fixing the bearing portion 5 is formed in the support plate portion 13. After the bearing portion 4 is fitted in the mounting hole of the support plate portion 12, the pair of ring-shaped fixing plates 9 are brought into contact with both sides and fixed to the support plate portion 12 by screws. The bearing portions 4 and 5 that support the drive shaft portion 2 are supported by support plate portions 12 and 13, and the support plate portions 12 and 13 are integrally formed with the mounting frame 10. The position adjustment such as centering can be performed by adjusting the position of the mounting frame 10. For this reason, conventionally, in the rotary drive device, it has been necessary to separately adjust the positions of the two bearing portions that support the drive shaft portion. However, in this embodiment, the position of the drive shaft portion 2 is adjusted by adjusting the position of the mounting frame 10. Adjustment can be performed, position adjustment work is simplified, and positioning accuracy can be improved.

Reinforcing plate portions 14 and 15 are integrally formed on both side surfaces of the support plate portions 12 and 13, respectively. The reinforcing plate portions 14 and 15 are integrally formed on the upper surface of the bottom plate portion 11 and are erected between the support plate portions 12 and 13. By providing the reinforcing plate portions 14 and 15, the interval between the support plate portions 12 and 13 can be set with high accuracy, and the accuracy set with almost no deformation even when the drive shaft portion 2 and the drive portion 3 are supported. Can be maintained. Therefore, if the mounting holes of the support plate portions 12 and 13 are machined with high accuracy, the bearing portions 4 and 5 can be accurately positioned, and the drive shaft portion 2 is attached to the bearing portions 4 and 5 to drive. The shaft portion 2 can be accurately positioned with respect to the mounting frame 10.
Therefore, even when the drive shaft portion 2 and the bearing portions 4 and 5 are removed from the mounting frame 10 during the maintenance work, the bearing portions 4 and 5 are attached and fixed to the support plate portions 12 and 13 respectively, thereby the bearing portion. The drive shaft portions 2 attached to 4 and 5 can be accurately positioned, and the efficiency of maintenance work can be improved.

  Further, when the drive shaft 2 and the rotating shaft of the forming drum are connected in a state where the drive shaft 2 is attached to the attachment frame 10, the surface opening and misalignment of the flanges provided at the front ends of both are eliminated. Although it is necessary to perform the centering work, the centering work may be performed by adjusting the positions of the four fixing portions 11a to 11d that fix the mounting frame 10 to the base, and the efficiency of the centering work can be improved. . In this case, since the fixing portions 11a and 11b and the fixing portions 11c and 11d are set to positions that are symmetric with respect to the central axis O, adjustment work can be easily performed. In addition, even when the molding drum is aligned with the conveyance conveyor that conveys the tire constituent member, the position can be easily adjusted by adjusting the positions of the four fixing portions 11 a to 11 d of the mounting frame 10.

  As described above, the assembly work and adjustment work of the rotary drive device can be simplified, so the work time when the two bearing parts are separately assembled and adjusted as in the past (about 8 hours) Can be reduced to less than half (about 3 hours). Therefore, the maintenance work time can be shortened, and it is possible to increase the time for performing the tire forming work by operating the rotation driving device, and the productivity can be significantly improved.

  DESCRIPTION OF SYMBOLS 1 ... Rotation drive device, 2 ... Drive shaft part, 3 ... Drive part, 4 ... Bearing part, 5 ... Bearing part, 6 ... Flange, 7 ... Fitting convexity Parts 10, mounting frame 11, bottom plate 12, support plate 13, support plate 14, reinforcing plate 15, reinforcing plate

Claims (4)

  A drive shaft connected to the rotation shaft of the forming drum, a drive portion for rotating the drive shaft portion, and disposed on both sides in the axial direction of the drive shaft portion, and rotatably supports the drive shaft portion. A rotation driving device for a forming drum, comprising: a pair of bearing portions; and an attachment frame integrally formed with a pair of support portions that respectively support the bearing portions.   The support portion includes a support plate portion arranged in parallel to a direction orthogonal to the central axis of the drive shaft portion, and a pair of reinforcing plate portions are formed integrally with the support plate portion between the support plate portions. The rotational drive apparatus of the molding drum of Claim 1 currently performed.   The rotation driving device for a forming drum according to claim 2, wherein a pair of fixing portions project from both sides of the support plate portion in a direction perpendicular to the central axis, and the mounting frame is fixed by the fixing portions. .   The said drive part is a rotational drive apparatus of the forming drum in any one of Claim 1 to 3 provided in the said drive shaft part between the said bearing parts.

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