JPH085067B2 - Endless rubber belt vulcanizer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotopress type vulcanizer for continuously vulcanizing endless rubber belts such as flat belts and V-belts. And a positioning device for a pair of guide rolls.

[0002]

2. Description of the Related Art A vulcanizer of this type is disclosed in, for example, Japanese Patent Laid-Open No.
There is a device described in Japanese Patent Publication No. 9-68222. In this device, as shown in FIG. 9, an endless rubber belt molded body A is bridged between a mold 32 and an extension pulley 30 which are arranged at a constant interval, and the mold 32 is arranged so as to sandwich the mold 32. An endless pressure band 40 is stretched over a pair of guide rolls 33 provided and a tension roll 36 arranged on an axis passing through the middle of these rolls 33, and the tension roll 36 is pulled via a cylinder 39. A force is applied to press the rubber belt molded body A on the peripheral surface of the mold 32 with the pressure band 40, and the mold 32 is rotated while the peripheral surface is heated by the internal heat source of the mold 32.

However, in the above-described rotopress type vulcanizing apparatus, the endless rubber belt molded body A is hung over or removed from the mold 32 and the extension pulley 30 which are respectively supported by a shaft, so that the work is complicated. Since the pressing force applied by the pressure band 40 from only one direction acts on the mold 32, the supporting device for axially supporting the mold 32 is increased in size so as to withstand a large axial load. There is an inconvenient aspect such as need.

Therefore, the present applicant has developed a device shown in FIG. 6 as a vulcanizing device that solves the above-mentioned problems of the vulcanizing device. This vulcanizing apparatus 1 ′ is detachably and rotatably supported on a conveying mechanism, and is opposed to a cylindrical mold 2 for winding and molding an unvulcanized rubber belt material, and the mold 2 as a center. A pair of endless pressure bands 1 which are arranged in a circular shape and can be pressed by surrounding opposite portions of their peripheral surfaces in an arc shape.
0, the peripheral surface of the mold 2 is heated from the inside, and the respective pressure bands 10 are pressed against the mold 2 so as to face each other, and the respective pressure bands 10 are synchronized with each other to a predetermined value. By rotating the mold 2 in the direction, the mold 2 rotates to continuously vulcanize the unvulcanized rubber belt molded body A. In the figure, reference numeral 4 is a guide roll, 5 is a pressure roll, and 6 is a tension roll.

By the way, in the vulcanizing apparatus of FIG. 6, the pair of guide rolls 4 and 4 are retracted from the mold 2 in an unvulcanized state (FIG. 7B), and the pair of guide rolls 4 and 4 are metalized. The guide rolls 4 and 4 are advanced and retracted in a vulcanized state (FIG. 7 (a)) in which the pressure band 10 is moved forward around the mold 2 and pressed against the peripheral surface of the mold 2 in an arc shape. , Mold 2
It is necessary to open and close the guide rolls 4 in accordance with the outer diameter of the and to position them. Such a guide roll 4.4
8A, 8B, and 8C are conceivable as the positioning device of FIG. That is, (a) a device in which the feed screw 52 is rotated by the drive motor 51 to move each of the guide rolls 4 and 4 with respect to the mold 2 along a constant inclination axis. (b) A device for advancing and retracting each of the guide rolls 4 and 4 by the expansion and contraction operation of the cylinder device 53 which is arranged oppositely. (c) Attach the guide rolls 4 and 4 to the mold 2 with the arm 54
A device that is arranged so as to be openable and closable via a worm gear 57 and a worm wheel 57 that rotates the arm 54 by a drive motor 55.

[0006]

However, each of the guide roll positioning devices described above has room for improvement in the following points.

A) Since it is necessary to individually move and position each guide roll according to the outer diameter of the mold detected by a sensor or the like, it is difficult to control the guide roll.

B) Since it is necessary to provide an independent positioning (moving) device for each guide roll, the structure becomes complicated, the device becomes large in size, and the manufacturing cost becomes considerably high.

The present invention has been made in view of the above points, and an object thereof is to provide a vulcanizing apparatus having a guide roll positioning device which has a simple structure, can be downsized, and can be easily controlled.

[0010]

In order to achieve the above object, the vulcanizing apparatus of the present invention comprises: a) a cylindrical metal mold having an unvulcanized rubber belt molding formed on its peripheral surface. A pair of guide rolls, which are arranged in the front part so as to be sandwiched, and which can be moved forward and backward, and an endless add-on looped over a tension roll arranged at the rear end facing the mold on the axis passing through the middle of these rolls. A vulcanizing apparatus for vulcanizing a rubber belt molded body by surrounding and pressing a pressure band in an arc shape, and rotating the pressure band while heating the peripheral surface of the mold to rotate the mold and b) Each guide roll is rotatably attached to the tip of the dogleg-shaped link member, and the bent portion of the link member is symmetrically supported by the main body of the apparatus with the central axis of the pair of guide rolls interposed therebetween, and c). Connect the base end of each link member to the The roll is slidably engaged with a guide member for positioning the die with various outer diameters so as to maintain a constant gap, and d) the guide member is formed on the apparatus body together with the tension roll into a die. It is configured to be able to move forward and backward.

Further, as described in claim 2, e) the guide member may be constituted by a guide groove formed in a plate body, and the plate body may be attached to the apparatus main body in a replaceable manner.

[0012]

According to the vulcanizing apparatus of the present invention having the above-described structure, when the rubber belt molded body formed on the peripheral surface of the large-diameter mold is vulcanized, as shown in FIG. By advancing the apparatus main body, the pressure band between the guide rolls is wrapped around the peripheral surface of the mold in an arc shape and pressed. In this state, the base end of the doglegged link member is located near the rear end of the guide member, and the gap (distance) between the guide rolls at the tip is widened, and the gap C between each guide roll and the peripheral surface of the mold is increased. Is constant.

During vulcanization of the rubber belt molded body formed on the peripheral surface of the small-diameter mold, the apparatus main body is advanced with respect to the mold as in the case of the large-diameter mold so that the space between the guide rolls is increased. The pressure band is brought into contact with the peripheral surface of the mold. Next, as shown in FIG. 3B, the tension rolls are retracted together with the guide members on the apparatus main body to widen the distance between the guide rolls and the tension rolls. In this state, the pressure band between the guide roll and the tension roll is stretched in a tensioned state to form a straight line. As the guide member retracts, the base end of the doglegged link member is located near the front end of the guide member, and the distance between the guide rolls at the tip is shortened, so that each guide roll and the peripheral surface of the mold are The gap C becomes constant.

In this way, by retracting the tension roll on the main body of the apparatus according to the outer diameter of the mold, the guide member also retracts according to the outer diameter of the mold, and the base of the dogleg shaped link member. The end is opened along the guide member, and the interval between the guide rolls at the tip of the link member is reduced so that the gap C between each guide roll and the mold is always constant.

According to the vulcanizing apparatus of the second aspect, the opening / closing position of the guide roll can be easily changed by exchanging the shape of the guide groove together with the plate body.

[0016]

Embodiments of the vulcanizing apparatus according to the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of the vulcanizing apparatus of this embodiment with a part thereof omitted, and FIG. 2 is a front view of the vulcanizing apparatus of FIG. 1 with a part thereof omitted. 3 (a) and 3 (b) are plan views of the vulcanizer, respectively, and FIG. 3 (a) shows the case of a large-diameter mold, FIG. 3 (b).
Indicates the case of a small-diameter mold.

First, the overall structure of the vulcanizing apparatus 1 will be described. As shown in FIGS. 1 and 2, the chain 1b conveys along a number of paired guide portions 1a with the center line of the apparatus 1 as a boundary. The mold 2 is placed on the carriage 1c to be carried in. 1d in FIG. 1 is a drive motor for the chain 1b. A pair of apparatus main bodies 3 facing each other as shown in FIG. 2 are disposed on the left and right sides of the mold 2 so that they can approach and separate from the mold 2 via a cylinder device 3a.

A pair of guide rolls 4 and 4 are arranged in each apparatus main body 3 so as to sandwich the mold 2, and the pressure roll 5 and the tension from the mold 2 side on the central axis of the guide rolls 4 and 4. The rolls 6 are sequentially arranged so as to face each other. The rolls 4 to 6 are bearings (not shown).
It is rotatably supported via.

As shown in FIG. 1, each of the guide rolls 4 is rotatably attached to the tip of a dogleg-shaped link member 7 rotatably supported on the apparatus main body 3 at a substantially central bent portion. It is pivotally supported. The link member 7 has links vertically on the tip side of the pivot shaft 7a, but has a link only on the bottom side of the pivot shaft 7a. The position of the pivot shaft 7a on the apparatus body 1 is inside the pressure band 10 described later. The pressure band 1 has such a structure.
This is because it is easy to exchange 0.

A slide base 8 is arranged at the rear of the apparatus main body 3 so as to be movable back and forth with respect to the mold 2. The tension roll 6 is rotatably arranged on the slide base 8 to drive the rear end. It is rotated by a transmission belt 8n by a motor 8m. Further, on the slide base 8, a pair of guide grooves 9 for positioning the guide roll 4 at the tip of the link member 7 are provided in a "C" shape. In order to easily change the shape of these guide grooves 9, they are opened on a plate body 9a which is separate from the slide base 8 and are mounted on the slide base 8 in a replaceable manner. The base end of each link member 7 is engaged with the guide groove 9 via a bearing 9b. The guide groove 9 may be directly formed in the slide base 8 as shown in FIG. 3, and the guide groove 9 may be replaced by a projecting guide member that can be engaged with the bearing 9b.

An example of how to set the shape of the guide groove 9 will be described below. As shown in FIG.
The outer diameter of the pressure roll 10 is the largest and the outer diameter of the mold 2 is the smallest as shown in FIG. 3 (b). And the position of the base end of the link member 7 is determined so that the gap C between the mold 2 and each guide roll 4 becomes constant. And
While gradually changing the outer diameter of the mold 2 between the maximum diameter and the minimum diameter, the locus of the base end of the link member 7 in each diameter (y direction)
In addition to the above, it is possible to obtain the amount of retreat of the tension roll 6 (x direction) accompanying the reduction of the diameter of the mold 2, and to set the shape of the guide groove 9 based on these loci (x direction and y direction).

The pressure roll 5 is rotatable on the front portion of the apparatus main body 3 and is in a cylinder device 5a (FIG. 2) with respect to the mold 2.
It is arranged so that it can be moved back and forth through.

An endless pressure band 10 is serially stretched over the pair of guide rolls 4 and 4 and the tension rolls 6 on both sides. As the pressure band 10, a flat rubber band, a steel band, or the like is used.

As shown in FIG. 2, struts 11 and 11 are erected on both sides of the mold 2 of the vulcanizing apparatus 1, and at the center of a support member 12 provided between the upper ends of the struts 11. A vapor introducing nozzle 13 is arranged downward via a cylinder device 14 and guides 15 and 15 so that it can be moved up and down. Further, a steam discharge nozzle 16 is arranged at the center of the lower end of the vulcanizer 1 facing the steam introduction nozzle 13 so as to be able to move up and down via a cylinder device 17. The mold 2 is composed of a cylindrical body having openings 2a and 2b at the upper and lower ends, and at the time of vulcanization, a steam discharge nozzle 16 is provided at the lower end opening 2b of the mold 2 and a steam introduction nozzle 13 is provided at the upper end opening 2a. They are connected to each other, and the rubber belt molded product A on the peripheral surface thereof is heated from the inside of the mold 2. Further, the cotters 18 and 19 that engage with the apparatus main body 3 in a state where the apparatus main body 3 is advanced with respect to the mold 2 are provided on both the upper center and the lower lower side of the column 11.
Is rotatably arranged in the vertical direction via the cylinder devices 18a and 19a.

4 and 5 show a vulcanizing apparatus according to another embodiment, in which a slack eliminating mechanism 21 is arranged at the rear end of the slide base 8 just behind the tension roll 6. This slack eliminating mechanism 21 is shown in FIGS.
As shown in (b), a pair of gears 23, 23 are meshed with each other and rotatably pivotally supported on the upper end of the support member 22 provided upright on the slide base 8 (FIG. 1). Rotation axis 2
The base ends of arms 24 of equal length are attached to gears 23 so as to rotate integrally with gears 23, respectively. Then, as shown in FIG. 3, the auxiliary arm 25 is extended from the base end of the one arm 24 in a dogleg shape.

Further, a support metal fitting 27 is fixedly attached to the tip of a support plate 26 extending laterally from the upper end of the support member 22,
A coil spring (pull spring) 28 is stretched between the support fitting 27 and the tip of the auxiliary arm 25 to urge the arm 24 outward (opening direction). The arm 2
The upper end of the slack eliminating roll 29 is rotatably suspended at the tip of the slab 4, and the slack eliminating roll 29 is pressed against the inside of the pressure band 10 as shown in FIG. Since the other configurations are common to the vulcanizing apparatus of the first embodiment, common members are designated by the same reference numerals as those in FIGS. 1 and 2, and description thereof is omitted.

Next, the operation of the vulcanizing apparatus of the embodiment having the above structure will be described with reference to FIGS. 4 and 5. 4 and 5 show a case where a rubber belt molding formed on the peripheral surface of a mold 2 having a small outer diameter is vulcanized.
When carrying in (carrying out), as shown in FIG. 4A, the device main bodies 3 on both left and right sides are retracted, and the slide base 8 is at the foremost position. Therefore, the bearing 9b at the base end of the link member 7 is located at the rear end of the guide groove 9, and the guide rolls 4, 4 at the tip of the pair of link members 7 are open. Further, the arms 24 on both sides of the tension roll 6 are opened outward by the urging force of the coil springs 28, and hold the pressure band 10 in a tension state over the entire length.

When the mold 2 is carried into the central portion of the apparatus 1, the apparatus main bodies 3 on both sides move forward as shown in FIG. 4 (b), and the pressure band 10 between the guide rolls 4 and 4. The mold 2 is pressed by contacting the mold 2. As a result, the pressure band 10 between the guide rolls 4 is pulled, and the arms 24 on both sides are slightly closed inward against the coil springs 28.

Then, as the slide base 8 is retracted with respect to the apparatus main body 3, the base ends of the link members 7 on both sides spread along the guide groove 9 as shown in FIG. The rolls 4 and 4 are closed, and the mold 2 is pressed by the pressure band
0 surrounds in an arc shape. As a result, the pressure band 10 between the guide roll 4 and the tension roll 6 becomes linear, and the arms 24 on both sides close further inward against the coil spring 28.

Next, the pressure roll 5 advances to press the pressure band 10 on the mold 2 as shown in FIG. 5 (b).

In this state, the steam discharge nozzle 16 is provided at the lower end opening 2b of the mold 2 and the steam introducing nozzle 13 is provided at the upper end opening 2a.
Are connected to each other to introduce steam into the mold 2 to heat the rubber belt molded body A. At the same time, pressure bands 10 on both sides
Slowly rotate in sync with each clockwise. As a result, the rubber belt molded body A around the mold 2 is
It rotates with the mold 2 and is completely vulcanized while the mold 2 makes at least one revolution. The rubber belt molding A on the mold 2 is pressed by the pressure band 10 and then the pressure band 1
The pressure roll 5 applies linear pressure even from above 0.

By the way, in the vulcanizing apparatus 1 of the above embodiment,
Since the toothed belt is vulcanized and molded, pressure rolls 5 are arranged opposite to each other in order to increase the pressure and ensure the formation of teeth, but a flat belt or V-belt without teeth is provided. The pressure roll 5 can be omitted in the case of manufacturing. Further, the vulcanizing apparatus shown in FIGS. 4 and 5 includes the slack eliminating mechanism 21 for the pressure band 10, but the vulcanizing apparatus can be similarly implemented even when the slack eliminating mechanism 21 is not provided. Further, since the vulcanizing apparatus 1 of the above-described embodiment has a structure in which the mold 2 is surrounded and pressed by the pressure bands 10 in an arc shape from both sides thereof, the positioning mechanism is provided on each of the guide rolls 4 on both sides. However, it goes without saying that the present invention can be similarly applied to a known rotopress type vulcanizing device in which the pressure band 10 is pressed from only one side of the mold 2.

[0034]

As is apparent from the above description,
The vulcanizer of the present invention has the following effects.

(1) The structure is simpler and the size can be reduced as compared with the conventional positioning device for individually positioning the pair of guide rolls.

(2) Since the guide roll is positioned in conjunction with the forward / backward movement of the tension roll, the positioning control is easy. Further, since the guide roll is positioned, a special driving device is not required, and the installation space is small.

(3) In addition to the effect (1), the apparatus according to claim 2 has an effect that the positioning of the guide roll can be easily changed by exchanging the shape of the guide groove together with the plate body. .

[Brief description of drawings]

FIG. 1 is a plan view in which a part (left half) showing a vulcanizing apparatus according to an embodiment of the present invention is omitted or represented by an outline.

FIG. 2 is a front view in which a part (left half) of the vulcanizing apparatus of FIG. 1 is omitted or represented by an outline.

3 (a) and 3 (b) are plan views of the vulcanizing apparatus, FIG. 3 (a) shows a case of a large-diameter mold, and FIG. 3 (b) shows a case of a small-diameter mold. Indicates.

4 (a) and 4 (b) are plan views showing a vulcanizing apparatus according to another embodiment, and FIG. 4 (a) to FIG.
(b) represents sequentially from the state before vulcanization to the vulcanization state.

5 (a) and 5 (b) are plan views showing a vulcanizing apparatus according to another embodiment, respectively, sequentially showing the state from FIG. 4 (b) to the vulcanized state.

FIG. 6 is a perspective view showing an outline of a vulcanizing apparatus previously developed by the applicant.

7 is a plan view of the vulcanizing apparatus of FIG. 6, FIG. 7 (a) shows a vulcanizing work state, and FIG. 7 (b) shows a non-vulcanizing work state.

FIG. 8A to FIG. 8C are plan views showing a vulcanizing device equipped with a general guide roll positioning device.

FIG. 9 is a plan view showing an outline of a conventional rotopress type vulcanizing apparatus.

[Explanation of symbols]

 1 Vulcanizing Device 2 Mold 3 Device Main Body 4 Guide Roll 5 Pressure Roll 6 Tension Roll 7 Link Member 8 Slide Base 9 Guide Groove (Guide Member) 9a Plate 10 Pressure Band A Rubber Belt Molded Body

Claims (2)

[Claims] 1. A pair of guide rolls, which are arranged in the front part of the cylindrical mold having an unvulcanized rubber belt molded body formed on its peripheral surface and are sandwiched between the molds, and which can move forward and backward, and an intermediate of these rolls. The endless pressure band, which is wound around a tension roll arranged at the rear end facing the mold on an axis passing through, is wound in an arc shape and pressed, and the peripheral surface of the mold is heated and heated. In a vulcanizing device for vulcanizing a rubber belt molded body by rotating a mold by rotating a pressure band, each of the guide rolls is rotatably attached to the tip of a dogleg-shaped link member, The bent part is symmetrically supported by the main body of the device with the central axis of the pair of guide rolls sandwiched between them, and the base end of each link member has a fixed gap between the guide roll at the tip and the mold of various outer diameters. Positioning guide to keep Slidably engaged in wood, the guide member,
A vulcanizing device for an endless rubber belt, characterized in that it is configured such that it can move forward and backward with respect to a mold together with the tension roll on the main body of the device. 2. The vulcanizing device for an endless rubber belt according to claim 1, wherein the guide member is formed of a guide groove formed in a plate body, and the plate body is replaceably attached to the apparatus body.