JPS5921778B2 - End surface joining device for rubber-like materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for joining end faces of rubber-like materials, and more particularly to an end-face joining apparatus for rubber-like materials that seams and joins end faces of sheet-like rubber-like materials reinforced with fibers or steel wires.

Generally, in the manufacturing process of rubber products reinforced with fibers or steel wires, such as tires and belts, it is often necessary to join sheet-like rubber materials reinforced with fibers or steel wires at the edges. .

For example, in a tire manufacturing process, a cord is coated with rubber using a calendar roll, then cut using a cutter, and wound up. A predetermined length of the wound rubber material is taken out onto a molding drum or the like, and its edges are joined together to form a cylindrical tire, which is then used to form a green tire. It is important to quickly and reliably perform such seaming, especially seaming on the forming drum, because it directly affects tire productivity and quality. Traditionally, rubber-like materials are joined manually on a forming drum, and this manual joining has the drawbacks of low work efficiency and a high incidence of joint defects. was.

Furthermore, as an apparatus that does not require such manual work, Japanese Patent Publication No. 52-35709 describes an apparatus including a pair of truncated conical pressing rollers and a receiving member facing the pressing rollers. However, since this device brings together the edges of opposing rubber-like materials and presses them together to join them, the bonding force of this joining part is insufficient, especially when joining on a forming drum. It cannot be used when reliable seaming is required, and it also has the disadvantage that the edge of the rubber-like material shifts in the direction of the seam due to the rotational force of the pair of presser rollers. Furthermore, such a conventional device is described in Japanese Patent Application Laid-Open No. 52-123472, in which a pair of joining members that are alternately overlapped are each formed integrally. However, this device has a drawback in that the end faces of the rubber-like material having irregularities, such as steps, cannot be joined together at the concave portions. The present invention was made in view of the above-mentioned drawbacks, and is a device for joining rubber-like materials whose end surfaces are arranged substantially parallel to each other. , a first joining pawl mechanism in which each pawl independently swings around the same axis, and a plurality of pawls with unevenness formed on the male surface of the tip, each pawl portion being independent. a second connecting claw mechanism that swings around an axis parallel to the axis of the first connecting claw mechanism; and a claw portion located inwardly of the first connecting claw mechanism and the second connecting claw mechanism. and a biasing mechanism that urges the first connecting claw mechanism and the second connecting claw mechanism in the expansion direction, the tips of the claws of the first connecting claw mechanism and the second connecting claw mechanism being arranged alternately in the axial direction and substantially parallel to each other. The claws of each joining claw mechanism are pressed against the end of the rubber-like material adjacent to the rubber-like material, and each claw swings independently according to the shape of the rubber-like material, thereby reducing the unevenness of the claws. It is an object of the present invention to solve the above-mentioned drawbacks by providing an end face joining device of a rubber-like material that presses the adjacent ends while holding the entire length of the adjacent ends in the longitudinal direction.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic front view showing an embodiment of the rubber-like material end surface joining device according to the present invention, and 1 and 1'' are a pair of frames erected at a predetermined distance apart. The space between frame 1.1'' is not shown. A positioning mechanism (not shown) is provided for positioning the two rubber-like materials M and MI conveyed by the conveyor, and a positioning mechanism (not shown) is provided near this positioning mechanism, and the positioning mechanism positions the two rubber-like materials M and MI so that their end surfaces face each other. Two rubber-like materials M, M
A joining mechanism 2 for joining the parts 1 and 2 is installed.

Reference numeral 3 denotes a screw shaft that is stretched between the frames 1 and 1'' above the joining mechanism 2, and a cylinder 4 can move forward and backward in the axial direction of the screw shaft 3 via a bracket (not shown) on the screw shaft 3. is supported by

A pressing member 6 is rotatably supported at the tip of the piston rod 5 of the cylinder 4. FIG. 2 is an exploded perspective view showing the joining mechanism 2. Reference numeral 7 denotes a supporting member having a U-shaped cross section and provided parallel to and below the joint of the rubber-like materials M, M. The upper surface of the support member T has a long groove 8 extending in its length direction, and a first protrusion 9 and a second protrusion 10 formed on both sides of the long groove 8. 11 is a plurality of protruding pieces formed to protrude from the soil surface of the first protruding part 9 and extending in the width direction thereof;
These protruding pieces 11 are provided at a predetermined distance from each other.

Reference numeral 12 denotes a plurality of protruding pieces extending in the width direction of the second protruding part 10, which are formed to protrude from the upper surface of the second protruding part 10, and these protruding pieces 12 are spaced apart from each other by a predetermined distance from the protruding pieces 11.
are arranged alternately.

Each of the protruding pieces 11 and 12 has a hole 13 parallel to the long groove 8.
are respectively formed, and a first swing shaft 14 is inserted and fixed in the hole 13 of the protrusion piece 11, and a second swing shaft 15 is inserted and fixed in the hole 13 of the protrusion piece 12, respectively. Reference numeral 16 denotes a plurality of first connecting claws arranged in parallel between each of the protruding pieces 11, the base ends of these first connecting claws 16 are swingably supported by the first swing shaft 14, and A large number of parallel grooves, that is, irregularities, are formed on the outer surface of the tip.

Reference numeral 11 denotes a plurality of second connecting claws arranged in parallel between each of the protruding pieces 12. The proximal ends of these second connecting claws 1T are swingably supported by the second swing shaft 15, and a large number of parallel grooves, that is, irregularities are formed on the cutout surface of the distal end thereof.

Further, the tips of the first connecting claws 16 and the second connecting claws 1T are arranged so as to alternately overlap with each other. Therefore, the first connecting claw 16 and the second connecting claw 1r each have a coaxial rocking center at their base end, and have unevenness formed on the male surface of their tip end, and each of them is independent. It is supported by the first and second swing shafts 14 and 15, respectively, so as to be able to swing freely. Reference numeral 18 denotes a bladder as a biasing mechanism provided in the long groove 8, and air is supplied and discharged to and from the bladder 18 via an air pipe (not shown).

That is, the bladder 18 is provided inside the first connecting claw 16 and the second connecting claw 1r so as to urge them in the expanding direction. 5 is a schematic side view of a joint roller (hereinafter referred to as joint roller) as the pressing member 6, and FIG. 6 is a view taken in the direction of the - arrow in FIG. Bracket 2
A pair of bosses 21 and 22 are fixed to the shaft 19 at a predetermined distance apart from each other in the length direction. These bosses 21,
22 has a bracket 23 having a U-shaped cross section in the circumferential direction.
, 24 are arranged at equal intervals, and these brackets 23, 24 are open to face each other. Reference numeral 25 indicates a plurality of segments, and the base end of each segment 25 is swingably supported by the bracket 23 via a pin 26, and the distal end thereof is bent toward the boss 22. .

Further, as shown in FIG. T, a plurality of claw-like projections 2T are formed on the male end of the segment 25. 28 is a plurality of segments provided to face the segment 25, and the base end of each segment 28 is connected to the pin 2.
It is swingably supported by the bracket 24 via the bracket 91, and its tip is bent toward the boss 21, and a plurality of claw-like protrusions 30 are formed on the outer surface of the tip. .

Further, the tips of the segments 25 and 28 are provided so as to alternately overlap each other, and the corresponding pair of segments 2
A compression spring 33 is inserted between brackets 5 and 28 via brackets 31 and 32, respectively. That is, the tips of each segment 25, 28 are disposed in the circumferential direction, are urged in the expanding direction by the compression spring 33, and abut against the back surface of the brackets 23, 24. The shape as a whole is a superimposed truncated cone. The shaft 19 and bosses 21 and 2 mentioned above
2 and the segments 25, 28 as a whole constitute the joint roller 6, which is movable toward the tips of the first and second joining claws 16, 17 in parallel to their swing center axes. It is provided. Also,
These first and second joining claws 16, 17 and joint roller 6 work together to join the end surfaces of the two rubber-like materials M, M''.Next, the operation will be explained. .

Now, the two rubber-like materials M, M'' are placed in predetermined positions by the positioning mechanism, that is, the ends of the rubber-like materials M, M'' are connected to the first and second joining claws 16, 1T of the joining mechanism 2. It is positioned and placed on top.

At this time, the piston rod 5 of the cylinder 4 is retracted, and the joint roller 6, ie the pressing member 6, is located above the rubber-like materials M, M'. At this time, as shown in FIG. 3, air is supplied to the bladder 18 via an air pipe, and the inside of the bladder 18 is maintained at a predetermined pressure. In this state, first, the cylinder 4 is operated to cause its piston rod 5 to protrude.

As a result, the joint roller 6 moves downward, and the tips of its segments 25, 28 are exposed to the rubber-like materials M, IV.
comes into contact with. Furthermore, as a result, the protrusions 2r and 30 formed on the outer surfaces of the tips of the segments 25 and 28 are made of rubber-like material M.
, grips the end surface of M. Next, the piston rod 5 of the cylinder 4 is further projected, and a drive mechanism (not shown) is driven to rotate the screw shaft 3.
As a result, the joint roller 6 is moved by the rubber-like materials M, M.
While pressing the end of the ``, move in the direction of the seam.
That is, each segment 25,
28 grips the ends of the rubber-like materials M and M' with its raised parts 2r and 30, and as shown in FIG. swing in the direction. At this time, the first and second connecting claws 16 and 11 also
As shown in FIGS. 2 and 4, the ends of the rubber-like materials M, M' are compressed against the bladder 18 while being pressed by the segments 25, 28 of the joint roller 6 and gripping the ends of the rubber-like materials M, M' from below. It swings in the opening direction about the first and second swing shafts 14 and 15, respectively. As a result, the rubbery material M
, M'' are elastically deformed and joined so that the front and back surfaces become integral and engage with each other. That is, the first and second joining claws 16, 17 and the joint roller 6
They work together to join the end surfaces of the two rubber-like materials M and M'. In other words, the claws at the tips of the first and second connecting claws 16 and 17 are coated with rubber-like materials M and M'' by the roller 6.
into the shape of the rubber-like material M, M'' (
By swinging each of the claws independently according to the thickness), the unevenness of the claws presses the adjacent ends while holding the entire length in the longitudinal direction. In the above-described embodiment, the joint roller 6 having a plurality of segments 25 and 28 overlapping with each other was used as the pressing member 6, but in the present invention, a cylindrical roller or the like may also be used. Alternatively, another mechanism having the same structure as the joining mechanism 2 may be placed above the joining mechanism 2 in parallel and facing each other, and this mechanism may be pressed against the joining mechanism 2 via the rubber-like materials M, M''. The end faces of these rubber-like materials M.M may be joined to each other by a method.

As described above, according to the present invention, there is provided a device for joining rubber-like materials whose end surfaces are arranged substantially parallel to each other, and which includes a plurality of claw portions each having an unevenness formed on the tip force surface. , a first joining pawl mechanism in which each pawl independently swings around the same axis, and a plurality of pawls with unevenness formed on the male surface of the tip, so that the pawls in the valleys are A second connecting claw mechanism that independently swings around an axis parallel to the axis of the first connecting claw mechanism.
a connecting claw mechanism; and a biasing mechanism that urges the claw portions of the first connecting claw mechanism and the second connecting claw mechanism inwardly in the expanding direction. The tips of the claws of the joint claw mechanisms are arranged alternately in the axial direction, and the claws of each joint claw mechanism are pressed against the ends of the rubber-like materials that are adjacent to each other in parallel to each other, thereby changing the shape of the rubber-like materials. The end face joining device is made of a rubber-like material in which each of the claws swings independently in response to the pressure, and the unevenness of the claws holds the entire length of the adjacent ends and presses them together. A rubber-like material that increases the bonding strength of parts, prevents the ends of the rubber-like material from shifting in the direction of the seam, and ensures reliable joining, and has unevenness such as steps formed on the surface. However, it can be reliably joined.

[Brief explanation of the drawing]

The attached drawings show an embodiment of the rubber-like material end face joining device according to the present invention, in which FIG. 1 is a schematic front view thereof, FIG. 2 is an exploded perspective view thereof, and FIG. 3 is a view similar to that shown in FIG. 4 is a view in the direction of the − arrow in FIG. 2, FIG. 5 is a side view of the joint roller, FIG. 6 is a view in the direction of the − arrow in FIG. The side view shown in FIG. 8 is a view taken along the - arrow in FIG. 16...First joining claw, 11...Second joining claw, 18...Bladder (biasing mechanism), 6...
...Press member, M, M''...Rubber-like material.

Claims (1)

[Claims] 1 A device for joining rubber-like materials whose end surfaces are arranged substantially parallel, which includes a plurality of claws with unevenness formed on the outer surface of the tip, and each claw independently connects to the same axis. It includes a first connecting claw mechanism that swings as a center of rotation, and a plurality of claw parts each having an uneven surface on the outer surface of its tip, each claw independently having an axis parallel to the axis of the first connecting claw mechanism. a second joint claw mechanism that swings with the center as a swing center; and a biasing mechanism that urges the claws of the first joint claw mechanism and the second joint claw mechanism inwardly in the expansion direction. The claw portions of the first joint claw mechanism and the second joint claw mechanism are arranged such that their tips are alternately arranged in the axial direction, and the respective joint claws are attached to ends of adjacent rubber-like materials in substantially parallel manner. The claws of the mechanism are pressed and each of the claws swings independently according to the shape of the rubber-like material, so that the unevenness of the claws is crimped while holding the entire length of the adjacent ends in the longitudinal direction. An end face joining device for rubber-like materials, characterized by: