JPS6113979B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tread supply device for automatically supplying forming former treads of a tire building machine.

As shown in Figure 1, the conventional method for supplying treads in tire molding is to extrude them into a desired cross-sectional shape in an extrusion process, then cut them into appropriate lengths, and coat the cut surfaces with rubber glue. A worker picks up the pieces 1' one by one, places them on the leaf tray car 2, and stores them near the tire molding machine 3. After pasting and forming the carcass on the forming former 4, the worker puts the carcass on the leaf tray car 2. car 2
Lift the leaf tray and take out the tored pieces 1' one by one and attach them to the carcass on the molded former 4, or the leaf tray car 2.
The treaded pieces 1' are taken out one by one from the treaded pan 5 and placed on the treaded pan 5. The treaded pan 5 is installed in the servicer 6 in advance, and after forming the carcass on the forming former 4, the treaded pieces 1' are taken out from the treaded pan 5 and placed on the carcass. A pasting method is commonly used, and this conventional method has the following problems.

(a) Supplying the tread to the molding former requires manual labor at all stages, resulting in low productivity.

(b) After cutting the tread in the extrusion process, a long time passes before it is used, so the length of the tread changes slightly.
Therefore, when pasting the treads, it is necessary for the operator to adjust the length of the treads so that they are not too long or too short, which requires time and skill and also causes unstable quality.

(c) After cutting the tread in the extrusion process, it takes a long time before it can be used, so in order to prevent poor adhesion, it is necessary to apply rubber glue to the cut surface of the tread, which requires time and material costs for application.

(e) Since the treads are pre-cut one by one and stored, the treads have to be taken out from the stock location every cycle of tire molding, resulting in poor productivity.

(d) Since the treads are cut one by one in the extrusion process, it is necessary for the worker to pick up each one from the conveyor in the extrusion process and place them on the leaf tray car, which is bad for productivity.

(f) Since the tread is stored as a cut piece for a long time, the degree of deformation is different between both cut ends and the middle part, resulting in unstable quality.

(g) The leaf tray cars that store the tored pieces have poor volumetric efficiency, so they require a large storage space, and they are bulky, so they require wide aisles for the tray cars to pass through.

The present invention was proposed for the purpose of providing a new tread feeding device capable of solving the problems of the conventional method described above, and includes a reel support mechanism for a stock reel, a tread transfer mechanism, a tread pull-out roll, and a tread supply device. It is equipped with a sagging prevention mechanism, a liner winding mechanism, a preheating mechanism for the tip of the tread, a tread cutting mechanism, a discharge mechanism for feeding the tread piece onto the molding former, and a tread piece pasting and pressing mechanism. This contributes to the full automation of

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

(1) Stock reel and its support mechanism In FIG. 2, a series of strip-shaped treads 1 are wound onto a stock reel 8 via a liner 7, and the stock reel 8 rolls its reel boss 9 on a reel set rail 10. The reel receiving roll 11 is mounted removably and rotatably on a pair of reel receiving rolls 11. The stock reel 8 itself does not have a driving source, but is rotated by the tension of the liner 7 as the tread 1 is pulled out by the take-out roll 18. The reel receiving roll 11 is attached to the upper part of the frame 12 by a support,
It is rotated as the stock reel 8 rotates.

Further, this reel receiving roll 11 has a stepped structure that matches the end surface of the reel boss 9 in order to prevent the stock reel 8 from wobbling during rotation.

(2) Pull-out roll In FIGS. 2 and 3, a rubber pull-out roll 18 is supported at the front of the frame 12 to take out a series of strip-shaped treads 1 together with the liner 7 from the stock reel 8. It is connected to the drive motor 28 by a chain.

(3) Mechanism for preventing sag of the tread In FIG. 3, a brake shaft 14 is supported on one side of the frame 12 so as to be slidable coaxially with the reel boss 9, and a brake 13 is supported on one end of the brake shaft 14. ing. Brake 1
3, the brake wheel 19 is moved to the brake shaft 14 by the key 20.
Fixed. A clamp 22 surrounds the brake wheel 19, to which a lining 21 is glued. The fastener 22 is supported at one end by a pin 23 on the brake wheel 19 so as to be openable and closable.
A bolt 2 is installed at the other end of the lining 21 to adjust the frictional force between the lining 21 and the brake wheel 19.
4. A nut 25, an inner spring 26 and an outer spring 27 are provided, and the frictional force increases when the nut 25 is tightened and decreases when loosened. In Figure 3, brake shaft 1
A clutch 15 is attached to the other end of 4. This clutch 15 moves around the support pin 17 by operating an operating lever 16 pivotally connected to the frame 12 by a support pin 17, and when connected to the reel boss 9, a brake is applied to the stock reel 8 and the clutch reel 8 is separated from the reel boss 9. The brake is now coming off.
By using the clutch 15 in a state connected to the reel boss 9 and by constantly applying the brake 13 so that the rotation of the stock reel 8 also stops as soon as the rotation of the pull-out roll 18 stops.
The tread 1 taken out from the stock reel 8 can be prevented from hanging down between the stock reel 8 and the take-out roll.

(4) Liner Winding Mechanism In FIGS. 2 and 3, a rubber grip roller 29 and a liner winding shaft 30 are supported at the front of the frame 12 in close proximity to the pull-out roll 18. A friction clutch 31 mounted coaxially with the liner take-up shaft 30 is connected to the geared motor 28 by a chain. The liner 7 peeled off from the tread 1 on the pull-out roll 18 passes through the grip roll 29 to the pull-out roll 1.
The liner is wound onto a box pivotally connected to a liner winding shaft 30 which rotates in the opposite direction to the liner winding shaft 30.
The pull-out roll 18 and the liner take-up shaft 30 are driven by the same geared motor 28, so the rotation speed is the same, but the diameter of the box attached to the liner take-up shaft is set to be equal to or larger than the diameter of the take-out roll. Moreover, since the liner winding diameter increases as the liner is wound, the liner winding speed always exceeds the tread and liner take-out speeds. Therefore, if a torque above a certain level is applied to the liner winding shaft 30, the friction clutch 31 The liner is always wound under tension by interrupting the rotation of the liner winding shaft and absorbing the difference between the liner winding speed and the tread and liner withdrawal speeds. Glytuprol 29
The draw-out roll 18 is pressed or released by the operation of the cylinder 32, and when the liner 7 is first wound around the liner winding shaft 30, the stock reel 8 is pressed against the reel receiving roll 11.
Normally, it is crimped onto the pull-out roll 18, except when it is not set on top.

(5) Centering mechanism In Figures 2 and 3, the drawer conveyor 3
EPC (line follower type terminal position control device consisting of phototube, logic circuit and cylinder drive device) is installed on the center line at the rear of 3.
34 is supported independently of the frame 12, while a centering cylinder 35 is directly connected to the frame 12 by a link mechanism, and the frame 12 is connected to a pair of centering cylinders disposed on the floor via wheels 36 at the bottom. It is mounted on rails 37. When the EPC 34 detects a deviation between the center line of the tread 1 taken out at a constant speed by the pull-out roll 18 and the center line of the draw-out conveyor 33, the centering cylinder 35 is actuated to move the entire tread drop-off section at an appropriate speed. The tread 1 is moved in a direction perpendicular to the traveling direction of the tread 1, and is centered before the tread 1 is transferred to the drawer conveyor 33. One tread support roll 38 fixed to the frame is arranged at the front and rear of the EPC 34, and supports the taken out tread 1 so that it does not come into contact with the EPC 34, and moves together with the let-off part during centering to perform centering and draw-out conveyor 33. Facilitate the transfer to The let-off section includes the stock reel 8, the frame 12 that supports the stock reel 8, and the brake 1 of the stock reel 8.
3. Drawer roll 18, Gritspro roll 2
9. It consists of a geared motor 28 and a tread support roller 38 for driving the liner winding shaft 30, the runner winding shaft 30, and the pull-out roll 18.

(6) Transfer mechanism In FIG. 5, the pull-out conveyor 33 and the feed-out conveyor 39, which function to further pull out the centered tread 1 taken out from the stock reel 8 and transfer it toward the forming former 56, are driven by the same motor (not shown). ) is driven synchronously by Furthermore, since the pull-out conveyor 33 is connected to the motor via an electromagnetic clutch, it is also possible to drive only the feed-out conveyor 39 independently if necessary. Note that special belts with a V-guide structure are used for both conveyors 33 and 39 in order to prevent the belts from meandering. A receiving plate 40 is fitted in the gap between the drawer conveyor 33 and the delivery conveyor 39 in order to smoothly transfer the tread 1. This receiving plate 40
As will be described later, it also functions to receive the cutting edge of the tread cutter so that it does not hit the receiving plate 40. It goes without saying that the pulleys of each conveyor 33, 39 and the pull-out roll 18 are arranged horizontally and parallel to each other in order to convey the tread 1 straight in the former direction.

(7) Preheating mechanism In Figures 5 and 6, the roller conveyor 42
A phototube 41 for detecting the preheating position of the tread is fixed to the frame 43 of the tread 1 and is located near the delivery conveyor 39 and on the center line of the roller conveyor 42 so as not to be influenced by the shape of the tread 1. The Soroban roller 45, which is disposed below the phototube 41 and supports the tip of the tread 1, has a structure in which a plurality of disks are arranged coaxially and widely spaced from each other so as not to block the heat radiation from the preheating heater 44. It's summery. A tread preheating heater 44 is disposed below and adjacent to the Soloban roller 45, and is kept in an ON state at all times during the tread supply. The heat source of the heater 44 is preferably infrared rays, for example. For the diagonal cut surface of the tip of Toledo 1, press Soroban Roller 45 for about 30 to 60 seconds.
Stop on top and preheat to about 50-100℃. 100℃
If the temperature exceeds 50°C, the rubber will become burnt, and if the temperature exceeds 50°C.
If it is less than this, it is not preferable because it may cause poor adhesion when the treads are bonded together on the molded former 56.

(8) In FIGS. 5 to 7, the phototube 46 for detecting the tread preheating position is movably supported by the frame 43 of the roller conveyor 42, and the phototube 46 for detecting the tread preheating position is placed on the center line of the roller conveyor 42. is also positioned closer to the molding former 56. Therefore, the sizing detection phototube 46 can move along the frame 43 without being hindered by the preheating position detection phototube 41. The frame 43 is provided with a scale (not shown) that indicates the distance from the cutting position of the tread cutter 47, and by setting the phototube 46 to the desired distance scale, the tread piece 1 can be cut to a desired fixed size. ′ can be cut. The fixed size refers to the length of the pasting of the tread on the former. The cutter 47 has a sharp plate-like cutting edge with a width exceeding the tread width, has a built-in heater 48, and is equipped with a cylinder 49, so that the cutting edge of the cutter 47 is fed out at an appropriate angle, for example, 30 degrees, with respect to a receiving plate 40 (described later). It is supported by a frame (not shown) of the conveyor 39 so that its angle can be adjusted. By giving an angle to the cut surface of the tread in this manner, it is helpful to improve adhesion when both cut surfaces of the tread piece 1' are bonded together on the former 56. The cutter 47 is always preheated to a predetermined temperature by a heater 48,
To make the cutting smooth when pressing the tread 1 diagonally from the top to the bottom across its entire width, and to preheat the cut surface at the same time, both cut surfaces of the tread are pasted on the former 56 immediately after cutting. Helps ensure good adhesion when joining. That is, when the tread pieces 1' are bonded together on a former immediately after being cut, it is only necessary to preheat one of the cut end faces. A receiving plate 40 is supported by the frame (not shown) of the delivery conveyor 39 so as to fill the gap between the drawer conveyor 33 and the delivery conveyor 39 below near the cutting edge of the cutter 47. is carved over the entire width, and the cutting edge of the cutter 47 operated by the cylinder 49 pushes through the tread 1 and enters the notch 50, completing the complete cutting of the tread piece 1'. At this time, the cutting edge that has entered the notch 50 is prevented from hitting the receiving plate 40 by a stopper in the cylinder portion. The peel-off plate 51 constitutes a part of the receiving plate 40 , is pivotally attached to the receiving plate 40 with a pin 52 , and is connected to a cylinder 54 via a connector 53 . After the tread piece 1' is cut and the cylinder 49 is operated in the opposite direction to return the cutter 47 to its original position, the cylinder 54 is operated and the peeling plate 51 is rotated in the direction of the arrow about the pin 52 as a fulcrum. According to
The cut end of the series of strip-like treads 1 is connected to the receiving plate 40.
The treads can be peeled off from the surface of the tread to facilitate subsequent transfer to the delivery conveyor 39. After peeling off, the cylinder 54 operates in the opposite direction and the peeling plate 51 returns to its original position.

Note that instead of the mechanism of the peeling plate 51, an anti-sticking plate (not shown) made of a polyethylene fiber material, for example, can be attached and detached from the upper surface of the receiving plate 40, covering almost the entire width of the part corresponding to the cutting edge of the cutter 47. The transfer surface of the tread 1 can also serve as a part of the transfer surface.

(9) Discharge mechanism and pasting mechanism In Figures 5 and 6, the delivery conveyor 3
A roller conveyor 4 in which a plurality of free rollers 55 and one solo van roller 45 are arranged parallel to each other and on the same horizontal plane as the delivery conveyor 42 and the like between the roller conveyor 9 and the former.
2 is located, and although it does not have a driving source itself, the tread piece 1' is connected to the delivery conveyor 3.
Since the conveyor 39 is mounted astride the roller conveyor 42, the cut and separated tread pieces 1' are sent out in the direction of the former 56 by driving the delivery conveyor 39 independently.
It is discharged from the roller conveyor 42. Since the circumferential speed of the delivery conveyor 39 is set to be the same as the circumferential speed of the former, it is possible to discharge the tread piece 1' onto the former at the same speed as the circumferential speed of the former, thereby completing the process of pasting the tread on the former. Contribute to automating.

The roller conveyor 42 has a cylinder 6
0, the presser roller 62 at the tip is swung up and down about the pivot point 61, and the ejected tread piece 1'
is pressed against the former 56 to perform automatic pasting. Note that 63 is a crimping device with a built-in heater supported by a cylinder 64, which crimps the joint portion of the tread piece 1'.

The final press-bonding of the tread piece 1' to the former 56 is performed by a stitcher roll 66 that is moved forward and backward by a cylinder 65.

Next, the sequence of operating steps of this device will be explained.

First, as a preparatory operation before starting the operation, the stock reel 8 on which the series of band-shaped treads 1 have been wound together with the liner 7 is moved to the reel receiving roll 1 of the frame 12.
1, take out the leader part of liner 7, pull out roll 18, and grip roll 29.
The cylinder 32 is manually actuated to force the grip roll 29 onto the pull-out roll 18 via the liner 7, and then the lever 16 is operated to close the clutch 15. After connecting the reel box to the reel box, the geared motor 28 and the motors (not shown) for driving the drawer conveyor 33 and delivery conveyor 39 are simultaneously driven, and the liner 7 is peeled off and wound up while the tread 1 is pulled out from the stock reel 8. EPC3 to a position slightly past the cutting position of cutter 47.
4, the drive source is stopped, the cylinder 49 is operated manually, the cutter 47 cuts the tread, the cut and separated tread scrap pieces are removed, and the cylinder 54 is manually operated. Activation causes the peeling plate 51 to rotate and peel off the cut ends of the series of band-like treads 1 from the receiving plate 40. At this time, all drive sources are stopped, but the clutch 15 is connected to the reel boss 9, and the grip roll 29 is connected to the pull-out roll 18.
and the heater 48 of the cutter 47.
and preheating heater 44 are both turned on. After completing the above preparation operations and pressing the push button to turn on the automatic operation circuit, the drawer roll 1
8, liner winding shaft 30, drawer conveyor 33, and delivery conveyor 39
start synchronous driving by different driving sources. In the preparation stage, the tread 1 whose tip has already been pulled out to the cutting position of the cutter 47 is further transferred in the direction of the former 56.
At this time, the liner is peeled off from the tread and wound up at the let-off section, and the taken-out tread is constantly centered by the EPC 34 before the draw-out conveyor 33. The tip of the tread is the delivery conveyor 39
When it passes through and moves onto the roller conveyor 42,
The phototube 41 detects this and simultaneously stops the pull-out roll 18, take-up shaft 30, pull-out conveyor 33, and delivery conveyor 39. The tip of the stopped tread 1 is positioned on the Soroban roller 45 of the roller conveyor 55, and its cut surface is heated to a predetermined temperature by the preheating heater 44 for a predetermined time. After the heating is completed, the pull-out roll 18 and the winding shaft 3 are activated by the feed-out signal.
0, the pull-out conveyor 33 and the delivery conveyor 39 are driven simultaneously again to transport the tread 1 further toward the former 56. When the phototube 46 detects the tip of the tread 1 that has been transferred, the pull-out roll 18, take-up shaft 30, pull-out conveyor 33, and delivery conveyor 39
stops at the same time, the cylinder 49 operates, the preheated cutter 47 descends and cuts the tread 1, and after the cutting edge enters the notch 50 of the receiving plate 40 to complete the cutting, the cylinder 49 operates again. Then, the cutter 47 rises and returns to its original position.
Subsequently, the cylinder 54 is actuated to rotate the peeling plate 51 to peel off the tip of a strip tread 1 located in front of the cutting position from the receiving plate 40, and then the cylinder 54 is actuated again to rotate the peeling plate 51 and peel it off from the receiving plate 40. 40 returns to its original position. At the same time, the electromagnetic clutch of the drive section of the drawer conveyor 33 is disconnected, and only the feed conveyor 39 is driven, and the cut and separated tread pieces 1', which are riding on the feed conveyor 39 and the roller conveyor 42, are moved toward the former 56. and discharged from the roller conveyor 42,
As the roller conveyor 42 swings, the tread piece 1' is automatically attached to the former 56 by the presser roller 62, and is finished crimped by the stitcher roll 66, and then the joint portion is crimped by the crimper 63. When the discharge is completed, the delivery conveyor 3
9 is stopped, completing one cycle of tread supply.

As described above, in the present invention, a series of band-shaped treads are pulled out from a stock reel mounted on a reel support mechanism, the liner is peeled off by a liner winding mechanism, and the leading end is preheated by a preheating mechanism while the liner is being transferred on a transfer mechanism. Then, the cutter is cut to a fixed size by the cutting mechanism, and the cut and separated toread pieces are discharged onto the former and pasted.
Since the cycle can be performed automatically and continuously, it has the following extremely excellent advantages.

(a) Since the tread is fully automatically supplied to the former, so-called setup work in the tire molding process becomes easier and productivity is improved.

(b) Since the treads are cut to a fixed size by the cutting mechanism and then immediately pasted together on the former, there is no change in the length of the treads before pasting, and therefore there is no need to make adjustments when pasting them together, reducing the burden on the operator. This reduces the amount of stress, requires no skill, improves productivity, and stabilizes quality.

(c) Since the treads are cut to a fixed size by the cutting mechanism and then immediately pasted together on the former, there is no need to apply rubber glue to the cut surfaces during the extrusion process, which simplifies the extrusion process and reduces material costs. Savings are possible.

(d) After extrusion, the tread is rolled up as a series of strips onto the stock reel, so there is no need to pick up the cut tread pieces one by one and load them onto the leaf tray car as in the conventional method, and the production in the extrusion process is improved. Improves sex.

(e) Since the tread can be automatically and continuously supplied onto the former, there is no need to take out the tread pieces one by one from the stock location for each cycle of the tire molding process, improving the productivity of the tire molding process.

(F) Since the tread is not stored for a long time after being cut to a fixed size by the cutting mechanism, there is no problem of different degrees of change occurring at both cut ends and the middle part, and the quality is therefore stable. .

(G) Since a volume-efficient stock reel is used instead of a leaf tray truck for storing the tread pieces, the space required for storing and transporting the tread pieces is reduced, making it economical.

(H) Contribute to full automation of the tire molding process.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of a conventional tread supply device, Fig. 2 is a partial side view of the let-off section, Fig. 3 is a partial plan view of the let-off section, Fig. 4 is a partial sectional view of the stock reel brake mechanism, and Fig. 5 is a partial sectional view of the stock reel brake mechanism. 6 is a partial plan view of the ejection mechanism, and FIG. 7 is a partial sectional view of the cutting mechanism and peeling mechanism. 1...Band-like tread, 1'...Tread piece, 8
...Stock reel, 13...Brake, 18...
...Drawer roll, 29... Grip roller,
30... Winding shaft, 33... Drawer conveyor, 34... EPC, 38... Support roll, 39... Delivery conveyor, 41... Phototube, 42... Roller conveyor, 44... Preheating heater, 45... Soroban Roller, 46...
Photocell, 47... Cutter, 51... Peeling plate, 55... Free roller, 56... Molding former, 62... Presser roller, 63... Crimping device.

Claims (1)

[Claims] 1. A reel support mechanism that rotatably mounts a stock reel on which a band-shaped tread is wound through a liner, and a transfer mechanism that extends between the reel support mechanism and the molding former and transports the tread in the direction of the molding former. a drawer roll that pulls out the tread along with the liner from the stock reel; a tread sag prevention mechanism that applies a brake to the stock reel to prevent the tread from sagging while the tread is being pulled out by the drawer roll; A liner winding mechanism that peels and winds the liner from the tread, a preheating mechanism that preheats the tip of the drawn tread, and a cutting mechanism that cuts the rear side of the tread at a predetermined distance from the tip in the width direction. , a discharge mechanism that sends out the cut tread pieces downwardly at the same speed as the circumferential speed of the mold former, and a pasting and crimping mechanism that oscillates the discharge mechanism and affixes and presses the sent-out tread pieces to the mold former. A tread feeding device characterized by comprising: