JPH054901B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a drum device in a tire molding machine, and more specifically, to easily adjust the width of a drum body according to the width of a molded green tire. This invention relates to an improvement of a drum device in a tire molding machine that can perform the following steps.

[Prior art]

Conventionally, a drum for a tire molding machine is generally used by replacing it with a drum flange having a predetermined width corresponding to the width of a molded green tire. For this reason, replacing the drum flange requires a great deal of effort and time, and the tire molding machine must be stopped during that time, making it impossible to efficiently produce tires and improving productivity. I was unable to aim for this. Furthermore, in the case of the conventional device, it was necessary to manufacture many types of drum flanges depending on the width of the green tire, which caused a problem in that it was a heavy economic burden.

[Purpose of the invention]

This invention was devised by focusing on the conventional problems, and its purpose is to easily adjust the width of the drum body in accordance with the width of the molded green tire. As a result, it is possible to reduce labor and improve productivity, and there is no need to manufacture many types of drum flanges with different widths, so the economic burden can be reduced. The present invention provides a drum device.

[Structure of the invention]

In order to achieve the above-mentioned object, the present invention provides a drum device for a tire molding machine which is comprised of a pair of left and right drum units that are expandable and contractible with respect to a drum mounting shaft and are rotatable. is configured to be adjustable in horizontal movement along the drum mounting axis according to the width of the molded green tire, and between these drum units, the drum unit follows the expansion and contraction of the drum body, and the seam of the tire constituent materials of the molded green tire. The gist is that a supportable plate is provided correspondingly.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a side view of a tire molding machine embodying the present invention, and FIG. 2 shows a front view thereof. It is comprised of a first stitcher device 100 installed at the bottom and press-fitting the seam of the tire constituent material W1, and a second stitcher device 200 (winding stitcher device 200) installed at the side of the drum device 1.

In the drum device 1, a drum mounting shaft 2 supporting a drum body 50 is rotatably supported by a bearing unit 4 held by a support frame 3.

The drum mounting shaft 2 is rotationally driven by a drive device 6 such as a geared motor through a transmission part 5 such as a toothed belt or a toothed belt pulley, and this drive device 6 is connected to the frame 8 by a metal fitting 7.
installed on.

Further, the lower surface of the frame 8 is attached to be movable on a slide rail 10 via a plurality of slide bearings 9. The slide rail 10
is attached to the overall frame 11, and an air cylinder 12 for moving the drum device 1 forward and backward is attached to the overall frame 11 by a bracket 13.

On the other hand, since the output shaft 12a of the air cylinder 12 is connected to the frame 8, the entire frame 3 including the drum device 1 can be moved by the expansion and contraction of the air cylinder 12.

A first stitcher wheel 101 is installed on the frame 11 below the drum device 1.
In the stitcher device 100, the center line of the axis of the drum device 1 and the center of the stitcher wheel 101 are aligned.

The stitcher wheel 101 has a pin 10
It is held on the bracket 103 via 2.
A guide shaft 104 is attached to this bracket 103 via a flange 103a so as to face vertically downward, and an air cylinder 106 is attached to a part of the bracket 103 via a metal fitting 105.

The block 107 for guiding the guide shaft 103 is provided with guide parts such as a slide bearing rig and metal inside, and the base 10
8 and the cylinder 10
6 is also attached to this base 108. A slide bearing 1 is provided on the back surface of the base 108.
09 (see FIG. 2) and a nut block 111 that meshes with the feed screw shaft 110 is attached.

Furthermore, the slide bearing 109 is connected to the frame 1.
It moves on a slide rail 112 that is fixed to 1.

The feed screw shaft 110 is rotatably held by a bearing unit 113 attached to the frame 11, and one end thereof is connected to a drive device 115 such as a geared motor via a transmission component 114 such as a toothed belt pulley or a toothed belt. are connected, and thereby the feed screw shaft 110 is rotationally driven. With these configurations, the entire first stitcher device 100 including the base 108 is connected to the drive device 11.
5, it is configured to be able to reciprocate at a stable feed rate.

Next, the stitcher wheel 101 for crimping the splice portion (seam) of the tire constituent material W1 will be described in more detail with reference to FIGS. 3 to 5.

In FIG. 3, 103 indicates a part of the bracket in FIG. 1, which fixes the pin 102. The stitcher wheel 101 has two side plates 120 fixed to the pin 102.
a, 120b, and this side plate 120a,
It is composed of a plurality of pressure bonding wheel plates 122 (six in this embodiment) rotatably held between the pressure bonding wheels 120b via a thrust bearing 121.

A thrust bearing 121 built into the inner side surface of the side plates 120a and 120b.
is assembled at a depth that is half the thickness of the thrust bearing 121 or at a depth sufficient to prevent the needle unit including the retainer from being attached or detached.

Further, the plurality of crimp wheel plates 122 are each rotatably assembled onto the pin 102 via a disc-shaped boss 127 incorporating a collar 124, a radial bearing 125, and a compression spring 126.

The radial bearing 125 is connected to the collar 12.
4 so that they can each rotate independently relative to the pin 102, and the radial bearing 12
As shown in FIGS. 4 and 5, a plurality of guide holes 129 are formed in each boss 127 fixed on the top of the pin hole 102a and are equally divided. The compression springs 126 each having a certain elastic force are installed inside the holes 129.

Furthermore, a groove 130 is formed on the inner wall surface of each crimp wheel plate 122 to prevent the tip of the compression spring 126 from coming off.

The stitcher wheel 101 has the above-mentioned configuration, and the crimp wheel plates 122 are independently rotatable and are positioned opposite the boss 127 on the radial bearing 125 via the compression spring 126. By providing a space therebetween, it is possible to move the center of rotation on the same plane as the boss 127.

That is, even if there are irregularities on the crimp surface P as shown in FIG. 8, each crimp wheel plate 122 can follow the irregularities and crimp them by the elastic force of the compression spring 126.

For example, in the state shown in FIG. 8, the tire constituent material W1
The two crimp wheel plates 122 on the center side with respect to the crimp surface P at the joint are pressed inward against the elastic force of the compression spring 126, and the crimp wheel plates 122 located on the outside protrude outward. The periphery of the crimping surface P is crimped.

Furthermore, the crimping wheel plate 122 is restricted by the side plates 120a and 120b so that it cannot move laterally via the thrust bearing 121, so if the crimping wheel plate 122 has unevenness on the crimping surface as shown in FIG. The crimp wheel plate 122 is attached to the pin 10
It will not run away in a direction parallel to 2. In addition, unlike a deep groove thrust ball bearing, the thrust bearing 121 has a crimp wheel plate 12 on the side of its structure.
2, all the crimp wheel plates 122 located in the center function effectively.

Further, the crimping surface P of the crimping wheel plate 122 has a profile that forms an approximation R1 along the outer diameter of the green tire W to be crimped, thereby determining the position of the tire constituent material W1 to be crimped. Even if the stitcher wheel 101 is shifted from the center, it can be crimped correctly.

In the above embodiment, a plurality of compression springs 126 are used as elastic members between the boss 127 and the plurality of crimp wheel plates 122, but the present invention is not limited to this embodiment, and FIGS. As shown in FIG. 7, a structure may be employed in which a suitable elastic member such as urethane rubber 140 is lined between the boss 127 and the crimp wheel plate 122.

In addition, the stitcher wheel 101 described above
The lamination wheel functions as a so-called lamination wheel roller, but since each wheel of this kind of conventional wheels depends on the wheel's own weight, the diameter becomes large when pressing strongly, or it is difficult to use the own weight. Therefore, crimping can only be done from above, but
In the case of this embodiment, the crimping direction can be set arbitrarily, and the crimping force can be freely changed by selecting the output of the compression spring 126. In addition, the entire device can be downsized, and each crimping wheel plate 122 can be The ability to follow unevenness is also improved, and the degree of freedom in mechanical design can be increased.

Next, FIGS. 2 and 9 show a second stitcher device 202 (wrapping stitcher 200),
This second stitcher device 200 is installed on a plate 225 provided on a part of the overall frame 11.

230a and 230b shown in FIGS. 2 and 9 of the second stitcher device 200 are so-called rotary cylinders that rotate the crimping wheel 231.
The cylinder b has a piston, rack and pinion gear inside, and has a speed control device 232 using oil or the like at one end of the cylinder body. By controlling the moving speed of the piston with this device, stable rotational output can be obtained at low speeds.

The rotary cylinders 230a, 230b
The metal fittings 234 are attached to the moving bases 233a and 233b.
has been fixed through. Also, the moving base 233
A and 233b each have a boss 235, and a rotatable drum mounting shaft 236 is attached to each of the bosses 235. Frames 237a and 237b are attached to the upper end of this rotating drum attachment shaft 236.
The lower end is rotary cylinder 230a, 230b
is connected to. The frames 237a, 23
There are cylinders 238 in each of the cylinders 7b, which are connected to the crimp arms 240 via fittings 239.

The crimp arm 240 includes a frame 237a,
237b via a pin 241 (see FIG. 2) so as to be swingable. Rotatable crimping wheels 231 are attached to the upper ends of the crimping arms 240, respectively. Further, the moving base 233a,
233b is fixed by a fixed handle 251 through elongated holes provided in plates 250a and 250b. In addition, the moving bases 233a, 233
A key groove is provided between each of the plates 250 and 250b, and a key 252 is fixed to one side.
The key 252 can be moved only in the longitudinal direction via the key 252.

The plates 250a, 250b are fixed on the moving block diagrams 253a, 253b,
The moving blocks 253a, 253b are movably mounted on the guide rods 254a, 254b.

Further, the guide rods 254a and 254b are fixed on the base plate 225 via a bracket 255. Handles 256a and 256b are respectively attached to the bracket 255, and the positions of 253a and 253b can be adjusted by rotating the handles using the handles 256a and 256b and a feed screw mechanism (shown in the figure). I can do it.

In other words, the rotation centers A and B of the crimping wheel 231
The position can be adjusted to match the green tires.

Next, FIGS. 10 to 12 show detailed views of the drum device 1, in which the drum body 50 is made up of a pair of left and right drum units that can be expanded and contracted with respect to the drum mounting shaft 2 and is rotatable. The drum mounting shaft 2 that supports this drum unit is hollow inside and is provided with a long groove 60 passing through it, and key grooves 61 are provided in other parts.

The base block 62 is slidably assembled onto the drum mounting shaft 2 via a sliding key 82 incorporated in the long keyway 61.

In other words, the relative rotation of the base block 62 and the drum mounting shaft 2 is restricted, but they are movable in the longitudinal direction of the shaft.

A base block 62 is provided on the outer periphery of the drum mounting shaft 2, and the base block 62
Above, the air cylinder 63 is a green tire W
Divide into multiple pieces according to the location where splices should be crimped (in this example, divide into 6 pieces (60 pitches))
installed on. Further, a base block 64 is attached to the output shaft end 63a of the air cylinder 63. The base block 64 has a first
As shown in the center of FIG. 1, a groove 65 is provided at the center. A plate 66 is inserted into the groove 65 to support the green tire W from the inside when the green tire W is pushed by the stitcher wheel 101 in order to press-fit the material connection part P of the green tire W.

The surface of the plate 66 may simply be a flat surface, but more accurately, the surface of the plate 66 is formed so that the base block 64 forms a circle when the drum is open when viewed from the direction of the drum mounting shaft 2. arc R
has a profile matching 2. At the center of this plate 66, as shown in FIG. 10, there is a guide rod 67, which is slidably held by a slide guide 69 built into a drum center boss 68.

The center boss 68 is fixed to the drum mounting shaft 2 via a long key 82a, and as a result, the plate 66 can move toward and away from the drum mounting shaft 2.
It is designed so that it cannot be moved in the longitudinal direction of the shaft. A cover plate 70 is attached to the base block 64.
are attached to each drum, and a slope 71 is formed on the side closer to the center of each drum (the guide rod 67 side), so that the stitcher wheel 101 can move smoothly when compressing the green tire W. There is.

From this point, the plate 66 is connected to the base block 64.
into the groove 65 of the cover plate 7
0, the base block 64
is moved by the cylinder 63, it will move accordingly, and the base block 6
4 are in opposite positions, the plate 66 does not rotate about the guide rod 67, and the base block 64 itself also does not rotate.

Arc-shaped plates 72 are attached to both outer surfaces of the base block 64, and the green tire W bead portion Wb is wrapped around the crimping wheel 231.
This is to support the inside of the drum when it is pushed from the side toward the center of the drum.

An opening/closing shaft 75 having a right-handed threaded portion 73 and a left-handed threaded portion 74 is inserted into the drum mounting shaft 2, and one end of the opening/closing shaft 75 has a protruding portion for gripping and rotating with a tool or the like. 76 are provided. The opening/closing shaft 75 is rotatably incorporated into the drum mounting shaft 2 via a sleeve 77 and a bearing 78. Also right screw 73
The left-hand threaded portion 74 is provided with nut blocks 79 and 80 that engage with the threaded portions, respectively, and are connected to the base block 62 via a pin 81.

As a result, the base block 62 of the drum device 1
By rotating the opening/closing shaft 75, the drum width L can be easily and correctly changed by moving the drum width L by the same amount in the left and right directions around the center boss 68.

Further, in FIG. 12, the drum main body 50 is seen from arrow A in FIG. 10, and it can be seen that the width of the plate 66 is narrower than that of the cover plate 70.

The width of the plate 66 may be narrow if the line to be crimped by the stitcher wheel 101 is parallel to the drum mounting shaft 2, but if the line is not parallel but diagonal, the width should be adjusted accordingly. If the amount of movement of the stitcher wheel 101 and the rotation of the drum device 1 are synchronized, crimping can be performed.

Note that in the above embodiment, the left and right threaded portions 73, 7
Although the case where the base block 62 is moved by the same amount on the left and right sides using the opening/closing shaft 75 having a
These mechanisms have been abolished and the guide rod 6 has been added.
7. The center boss 68 and slide guide 69 are also abolished, and the plate 66 is made slidable relative to at least one base block 64, so that the left and right base blocks 62 can be adjusted in position independently, and then fixed by appropriate means. The drum width L may be changed.

Next, the effect will be explained.

First, FIGS. 13a to 13d show the bead portion Wb of the green tire W depending on the pressure bonding wheel 231.
This shows how the bead reinforcing material Wb affixed to is wrapped and crimped.

That is, when the green tire W is correctly mounted on the drum device 1, the green tire W is rotated by the geared motor 6, and then the compression wheel 2 is rotated.
31 is pressed by a cylinder 238, rotated by rotary cylinders 230a and 230b, and operates in the order of FIG. 13a, FIG. 13b, FIG. 13c, and FIG. 13d.

At this time, the rotary cylinders 230a, 230
Speed control device 232 incorporated in b
Since the wheel 231 rotates at a more stable speed, it is possible to wind it up correctly.

Further, as shown in FIG. 13a, since there is a gap α between the plates 72, the plates 72 and the wheel 231 do not come into contact with each other, so that mutual wear and damage can be prevented.

In addition, in the states shown in FIGS. 13b and 13c, there is a risk that the bead portion will be deformed by the crimping wheel 231 and cannot be rolled in properly. However, the gap α is minute and the rigidity of the bead portion itself It is possible to involve it better by having it.

Next, the overall operation of the present invention will be explained with reference to FIGS. 14a to 14h.

First, a green tire W molded by another molding machine is prepared by a suitable conveying and gripping device 400, and the drum device 1 enters into the green tire W as shown in FIG. 14b, and as shown in FIG. 14c. The drum opens and grips the green tire W correctly from the inside. Thereafter, the conveying and gripping device 400 is opened and then returned to the position shown in FIG. 14d. After that, the above-mentioned Figure 13a
- Perform the winding stitcher operation as explained in FIG.

At this time, as shown in FIG. 14a, the position of the part to be crimped is aligned with the plate 66 in FIG. Then, by rotating the feed screw shaft 110 by the geared motor 115, the stitcher wheel 101 is moved in a direction parallel to the drum mounting shaft 2.

If there are multiple parts to be crimped, rotate the drum body 50, bring the next part to be crimped downward, and repeat this operation.

In the above embodiment, the first stitcher device 100 is operated after the second stitcher device 200 (winding stitcher 200) is operated, but the second stitcher device 200 and the first stitcher device 200 are operated.
There is no problem even if the order of operation with the stitcher device 100 is reversed.

After the above operations, as shown in FIG. 14 f, the green tire W is sent out, and as shown in FIG. It ends with a retreat.

The above series of operations is an explanation of the operation according to the present invention.

〔Effect of the invention〕

As described above, the present invention provides a drum device for a tire molding machine that is comprised of a pair of left and right drum units that can be expanded and contracted with respect to a drum mounting shaft and that can be freely rotated. The drum unit is configured to be adjustable in horizontal movement along the drum mounting axis according to the width of the green tire, and the drum unit has a structure that follows the expansion and contraction of the drum body and corresponds to the joints of the tire constituent materials of the molded green tire. Since a plate that can be supported is provided, the following excellent effects can be achieved.

(1) The width of the drum body can be easily adjusted to correspond to the width of the molded green tire, eliminating the need to replace the drum flange as in the past, resulting in reduced labor and improvements in tire molding machines. The operating rate can be improved.

(2) It is also easy to press the tire constituent materials of green tires.

(3) Furthermore, since there is no need to manufacture many types of drum flanges with different widths, the economic burden can be reduced.

(4) Furthermore, since the configuration is simple, maintenance is also easy.

[Brief explanation of the drawing]

Fig. 1 is a side view of a tire molding machine embodying the present invention, Fig. 2 is a front view of Fig. 1, Fig. 3 is a partially vertical front view of a stitcher wheel, and Fig. 4 is a configuration of the stitcher wheel. A plan view of the boss, FIG. 5 is a front view of FIG. 4, FIG. 6 is a sectional view showing another embodiment of the crimp wheel plate constituting the stitcher wheel, and FIG. 7 is a half side view of FIG. 6. , Figure 8 is an explanatory diagram of the stitcher wheel operation, and Figure 9 is the second
FIG. 10 is a detailed sectional view of the drum body in which the present invention is implemented, FIG. 11 is a front view of the drum body in FIG. 10, and FIG. 12 is a diagram of the drum body. Partial views, Figures 13a to 13d are explanatory diagrams of the winding operation by the winding stitcher device, Figures 14a to 1
FIG. 4h is an explanatory diagram of the operation of the embodiment of this invention. 1...Drum device, 2...Drum mounting shaft, 50
...Drum body, 66...Plate, W...Green tire, Wb...Bead.

Claims (1)

[Claims] 1. In a drum device in a tire molding machine, which consists of a pair of left and right drum units that can be expanded and contracted with respect to the drum mounting shaft and are rotatable, the pair of drum units can be adjusted according to the width of the molded green tire. The drum unit is configured to be movable and adjustable in the horizontal direction along the drum mounting axis, and a plate is provided between the drum units that can follow the expansion and contraction of the drum body and support the joints of the tire constituent materials of the molded green tire. A drum device for a tire molding machine characterized by: