JPS644509Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a cylindrical product that can be applied to a tire and tire component conveying device of a tire molding machine, a raw tire loading and mounting device of a tire vulcanizing machine, a vulcanized tire take-out device of a tire vulcanizing machine, etc. The present invention relates to a gripping device.

FIG. 1 shows a conventionally proposed conveyance device for a tire molding machine (Japanese Unexamined Patent Publication No. 174236/1983). The device shown in the drawings includes a pair of discs 1 mounted on a moving device that can move in the axial direction of the drum, and a plurality of rotatable shafts 2 located concentrically at equal intervals around the circumference.
A lever 4 having a gripping member for a raw tire or an intermediate assembly 3 for raw tires and a triangular lever 5 are attached to these shafts 2, and the triangular levers 5 are connected to each other by a link member 6 connected with a pin. , constitutes a large number of mutually interlocking parallelogram link mechanisms, and
It is provided with at least one drive device 7 for swinging the triangular lever 5.

However, in the device shown in FIG.
and links 6 are connected sequentially, the clearance (or backlash) of each connection part accumulates, making it difficult to drive all the gripping members in synchrony, resulting in off-center (misalignment) of the gripped member. There was a simple flaw.

The present invention was proposed in order to eliminate the above-mentioned drawbacks of the conventional technology. A support, a swing lever that swings in a plane parallel to the base and is arranged at equal intervals on the same circumference of the base, and connects one end of the swing lever to the rotation ring. link mechanism,
It is an object of the present invention to provide a gripping device for a cylindrical object, which has a configuration consisting of a segment attached to the other end of the swing lever, has high centering accuracy, and has little deformation of the cylindrical object.

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 2 to 4 show an example in which the apparatus according to the embodiment of the present invention is adopted as a green tire loading/unloading device of a tire vulcanizer. In the figure, 8 is a mounting bracket to which a fixing ring 9 is fixed. 10 is a rotating ring, and a guide roller 1 is attached to a fixed ring 9.
1 and is arranged so as to be rotatable relative to the fixed ring 9. A driving cylinder 12 is attached to the fixed ring 9 via a bracket 13, and the rod end of the cylinder 12 is connected to the rotating ring 10 via a bracket 14.

Reference numeral 15 denotes a segment, which is swingably attached to one end of a swinging lever 16 that is swingably mounted to the fixed ring 9, and the other end of the swinging lever 16 is connected to a link 17, an adjustment nut 18, and a link. It is connected to the rotating ring 9 via 19. Link 17
The threaded portions of the link 19 and the link 19 are each reversely threaded. Furthermore, a rubber band 20 is disposed around the outer periphery of each segment 15 as shown. Note that instead of a rubber band, a spring may be used to connect adjacent segments.

Next, the action will be explained. When the rotary ring 10 is rotated relative to the fixed ring 9 by driving the cylinder 12, the lever 16 swings via the link 19, the adjustment nut 18, and the link 17, and the segment 15 becomes It moves to the position shown by 15a and is expanded or contracted in the radial direction. The expansion and contraction of the segments 15 grips and releases the tire. Further, the rubber band 20 is connected to a plurality of levers 1.
Each segment 15 is swingably attached to 6.
However, tension is applied so that they are always aligned centripetally.

As explained in detail above, according to the present invention, each segment is connected to the rotating ring via its respective swing lever and link mechanism, so that the expansion and contraction operations of each segment swing in complete synchronization, and the Depending on the outer diameter of the gripping member, displacement in the circumferential direction occurs when the diameter is reduced for gripping. Conventionally, a transfer device for a belt/tread assembly with segments was developed by JP-A-Sho.
Although proposed in Japanese Patent No. 58-28363, this segment moves directly in the radial direction, and theoretically there is no displacement in the circumferential direction. By moving the segments directly in the radial direction in this way, the segment guide cannot be omitted, and the guide rod comes out radially outward by the stroke of the segment when the diameter expands, so the segment can swing. The gripping device requires more space (in the radial direction) than the present invention. Particularly in the case of a tire molding machine where the part to be gripped is a tire, a large number of tire parts are wound around the drum at one location, so a large amount of space is required in the radial direction due to the arrangement of the tire part supply device. There are drawbacks such as: Therefore, the structure in which the segments move linearly in the radial direction as described above has a problem that the structure is more complicated and the cost is higher than that of the present invention. Since the present invention is constructed as described above, even if the member to be gripped is a cylindrical object such as a tire, the centering accuracy, especially in the radial direction, is high, and the device can be made compact. It has excellent effects.

Note that if an elastic body such as a rubber band is used, each segment can be aligned centripetally at all times, increasing the centering accuracy of the gripped member, and also ensuring that the gripped member and segments are aligned when gripping the gripped member. Since the clearance with the inner surface of the device can be reduced, the device can be made smaller. Moreover, if the segments are configured in a fan shape, the contact area with the cylindrical object to be gripped, such as a tire, becomes large, and a reliable gripping device with little deformation can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a conventional conveying device for a tire molding machine, FIG. 2 is a plan view of a cylindrical object gripping device showing an embodiment of the present invention, and FIG. 3 is a sectional view taken from A to A in FIG. FIG. 4 is a sectional view taken along line B-B in FIG. 2. Explanation of the main parts of the figure, 9... Fixed ring (base), 10... Rotating ring, 11... Guide roller, 12... Drive cylinder (drive device), 15...
... Segment, 16... Swing lever, 17, 19
... Link (link mechanism) 18 ... Adjustment nut.

Claims (1)

[Scope of utility model registration request] a base, a rotating ring that is rotatably held parallel to the base, a drive device that rotates the rotating ring;
A swinging lever that is pivotally supported by the base, swings in a plane parallel to the base, and is arranged at equal intervals on the same circumference of the base, one end of the swinging lever and the rotation. A cylindrical object gripping device comprising a link mechanism connecting the ring to the ring, and a segment attached to the other end of the swing lever.