JPH1024498A - Splicing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate loss at the change of arrangements and development of a roughened cut section by a method wherein a front truck and a rear truck, which are respectively movable to the widthwise direction and to the longitudinal direction of a green rubber sheet, a sheet delivering, a length detecting, a size cutting and a sheet preheating means and a pressure joining device of both ends of the sheet are equipped. SOLUTION: A green rubber sheet 1 wound in a roll is journaled on the front truck 11 or the rear truck 12 of a sheet delivering means 52 and prepared and changed for each other in response to the kind of product. The rubber sheet 1 delivering during its running towards the X-direction is carried to a cutting device 56 so as to measure its moving length with a length detecting means 57 and then cut widthwise with a size cutting means 51. A roller controller 42 supports the resultant sheet movably so as to hold its end parts above a preheating means 53 for the predetermined period of time for heating. The above-mentioned actions are performed by means of a control system 36 equipped with magnetic cards. Next, under the condition that the tip part and the tail part of the sheet is butted against each other so as to be pressure-welded to each other with a sheet joining device 55 in order to form a cylindrical rubber sheet 46.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a relatively thick unvulcanized rubber sheet, for example, an unvulcanized rubber sheet for a bottom rubber, which is a constituent material of the power transmission belt in a manufacturing process of the power transmission belt. The present invention relates to a device (referred to as a splice device) used in a step of cutting a material prepared in a scale into a predetermined length, joining ends thereof, and forming a cylindrical rubber sheet (referred to as a slab).

[0002]

2. Description of the Related Art FIG. 1 is a perspective view showing an outline of a splicing apparatus according to the present invention.
A conventional splicing device will be described with reference to FIG.
Sheet feeding means (front bogie 1 in the conventional splicing apparatus)
1), a cutting device, and a joint device in this order. The sheet feeding means has the same structure as the front bogie 11 shown in a part of FIG. 2 (FIG. 2 shows a side view of the sheet feeding means of the splicing device of the present invention).
That is, a shaft support 70 for supporting a roll 1 ′ on which a rubber sheet is wound around a bogie frame 21 with a liner interposed therebetween, and the rubber sheet 1 unreeled from the roll 1 ′.
Rolls 24 and 25 for guiding the guide and guide roll 2
Liner winding means 23 (box shaft driven by a motor) for separating and winding liner 13 'in 4
And Usually, two sheet feeding means (also referred to as a feeding cart) are prepared so as to be movable in the width direction of the rubber sheet 1. This is because they are used alternately in the case of the setup change described later. In addition, the shaft support 70 inserts the lifting prevention pin 116 shown in FIG. 7 into a through hole (not shown) of the shaft receiving bracket 117, and the box shaft 1 supported by the bearing 115.
14 is prevented from rising. The unvulcanized rubber sheet used here usually has a thickness of 2 to 8 mm and a width of 200 to 10
It is 00 mm, wound around a box shaft with a liner interposed, and prepared as a roll 1 ′.

[0003] The feeding operation of the rubber sheet 1 by this feeding cart is performed by supplying a predetermined amount of rubber sheet from one feeding cart and then checking the type of rubber sheet (rubber type, size, etc.) in a state where the rubber sheet has a remaining amount. ) Is required to be changed (called setup change), a portion of the rubber sheet remaining from the delivery cart to the cutting portion and having a sagging dancer function by its own weight (referred to as a sheet lead portion L)
Is unwound or folded and removed from the delivery cart, and then replaced with a delivery cart carrying a rubber sheet to be used next.

The cutting device 56 is provided near the downstream side of the sheet feeding device (only the front bogie 11), and is provided with the rubber sheet feeding conveyor 18, the measuring means 57 and the fixed size cutting means 5.
1 is provided. The rubber sheet feeding conveyor 18 is a conveyor belt, and has, on its upper surface, sheet pressing means 17 for holding the rubber sheet 1 and a length for measuring the length of the rubber sheet 1 pulled out in synchronization with the rubber sheet feeding conveyor 18. And a measuring device 19. The rubber sheet 1 is pulled out while its length is measured, passed through a fixed-size cutting means 51, and is clamped by a front end clamp device 54 to a sheet joint device 5.
5 (see FIG. 1).

As shown in a partially enlarged view of FIG. 6, the conventional measuring means comprises a rotary encoder as a length measuring device 19 'and a roll body 99 rotatably set across the rubber sheet 1. Prepare. The roll body 99 presses the rubber sheet 1 against the rubber sheet feed conveyor 18 so that the rubber sheet 1 can be conveyed. One end of the roll body 99 is attached to a frame of the rubber sheet feeding conveyor 18 (not shown) via a hinge 98, and can be turned up and down (in the direction of arrow V) by a handle 100 (in a state where the imaginary line has moved upward). Shown). This is because the roll main body 99 is separated from the rubber sheet feeding conveyor 18 when the type of the rubber sheet 1 is exchanged (setup change).

As shown in FIGS. 4 (a) and 4 (b), the conventional slicing means supports the rubber sheet 1 guided by the rubber sheet feeding conveyor 18 from below and supports the rubber sheet 1 by the rubber sheet 1. It has a slit plate 5 having a linear slit 30 'in the width direction, a vertical lower pressing plate 3' for pressing the upper surface of the rubber sheet, and an oblique pressing plate 2 'having a similarly flat lower surface. The vertical holding plate 3 ′ and the oblique holding plate 2 ′ are attached to a frame (not shown) by forming a linear slit 31 ′ having a predetermined width at a position corresponding to the slit 30 ′ of the slit plate 5.
The straight blade 4 supported by the holder 28 through 1 '
The rubber sheet 1 is attached to a frame (not shown) so as to run in the width direction. The slit plate 5, the vertical pressing plate 3 'and the oblique pressing plate 2' are heated to a predetermined temperature by a heating means (electricity, steam, etc.). This is because the rubber sheet 1 is heated and softened to facilitate cutting by the straight blades 4 and to facilitate adhesion of the rubber sheet in a continuous joint operation. The straight blade 4 cuts the rubber sheet 1 at a predetermined position in response to an instruction from control means (not shown).

[0007] The rubber sheet cut to a predetermined length in this manner is clamped at the distal end by a distal end clamp and transferred to the joint device which is the next step. Seat joint device 5
5 (FIG. 1) raises and lowers the upper press platen 43 with an air cylinder or the like (not shown in detail), and presses the joint portion of the cylindrical rubber sheet 46 hung on the lower press platen 44.

[0008]

However, the following problems remain in the above-mentioned conventional apparatus. That is, as described above, the type of the rubber sheet (rubber type, size, etc.) is changed as described above. Until (Seat lead part)
Must be rewound on the delivery cart or folded to remove it. In the former case, it is necessary to prepare a motor for rewinding and a power supply for each unwinding carriage,
There is a problem that the structure of the delivery cart becomes complicated and expensive.
In the latter case, a fold mark remains on the rubber sheet while the rubber sheet is folded and stored.
When guiding the fixed size cutting means of the cutting device, problems such as wrinkling and clogging occur, and the measuring instrument also jumps due to unevenness in the measuring scale to increase the length error.

Conventionally, a shaft supporting member of a bogie uses a pin for preventing the shaft from being lifted. However, there is a large allowance for the shaft, and the pin may fall off or bend. The lifting of the shaft means that when the rubber sheet is rewound, the rubber sheet (specifically, the liner between the rubber sheets) is tensioned and pulled out, so that the shaft rises from the shaft support and is likely to come off. Say.

In the above-described sheet lead portion, since the rubber sheet hangs down by its own weight, the sheet may be swayed and meandered due to vibration during work, and wrinkles may be generated at the position of the holding roll.

In the slicing means, as described above, the vertical pressing plate and the oblique pressing plate form a slit having a predetermined width at a position corresponding to the slit of the slit plate to press the rubber sheet. Further, the slit plate, the vertical pressing plate, and the oblique pressing plate are heated to a predetermined temperature by a heating means to facilitate cutting. The rubber sheet is heated and softened, and is held by the holding plate so that there is no escape.When the straight blade is run and cut, the frictional resistance between the rubber and the straight blade is large, The rubber adheres and proceeds while tearing apart a part of the rubber, and the torn unevenness (also referred to as crushing) is left. In the part where the irregularities are generated, there is a problem in that a variation in the joining force becomes large in a later joint work, and a variation occurs in the dimension of the slab.

Further, the slit formed by the vertical holding plate and the oblique holding plate is designed to be as narrow as possible in order to stabilize the cutting length (the lower surface of the vertical holding plate is pressed on the entire surface). When the rubber sheet is rich in elasticity at room temperature, the rubber can be deformed and restored and cut without any problems.
When the above-mentioned heating conditions are added, the rubber is softened when pressed by the straight blade and is torn before being deformed, thereby increasing the above-mentioned crushing phenomenon.

[0013] When an air cylinder is used, the seat joint device needs to prepare an air source, so that the size of the device increases, and there is a problem that the causes of failure increase.

The present invention has been made in view of the above points, and eliminates loss due to unwinding and folding of a rubber sheet when performing setup change in a splicing process.
It is an object of the present invention to provide an unvulcanized rubber sheet splicing device for solving other problems such as roughening or crushing of a surface of a cutting section in a fixed size cutting means.

[0015]

The splicing apparatus according to the present invention is a splicing apparatus that cuts a long rubber sheet into a predetermined length and joins the rubber sheet into a cylindrical shape. A front bogie movable in the width direction of the sheet, a rear bogie movable along the length of the rubber sheet, and a sheet feeding means having a rubber sheet transporting platform, c) measuring means,
The cutting device includes a cutting device having a fixed size cutting device and a sheet preheating device, and d) a sheet joint device for pressing both ends of the cut rubber sheet.

The sheet feeding means is a device for feeding a long rubber sheet prepared in a roll shape to a step of using a cutting device (referred to as a cutting step). ) Is intended to be easy. The front bogie is movable in the width direction of the rubber sheet similarly to the conventional feeding bogie, and two front bogies are prepared and alternately moved for use. The present invention further prepares a rear bogie and 3
The purpose of the present invention is to prepare three types of rubber sheets on three feeding carts to facilitate setup change even in high-mix low-volume production. The changeover of the front bogie is performed by rewinding or folding the seat lead portion as before. While using the rubber sheet of the rear bogie described later, move in the horizontal direction to prepare the next rubber sheet to be used, and if you do not change the type of rubber sheet, rewind the sheet lead part Save as is. By providing the liner winding means, the liner wound between the rubber sheets can be wound and unwound without applying tension to the rubber sheet. This is because the unvulcanized rubber sheet is easily deformed and prevents elongation.

The rear bogie has a rubber sheet conveying platform that can support and convey the rubber sheet beyond the front bogie, in addition to the same structure as the front bogie (also referred to as a rubber sheet feeding mechanism). This rubber sheet conveying platform has a drive roll at the tip and a roller conveyor or belt conveyor at other portions, and has a length and height exceeding that of the front bogie. In addition, this rubber sheet conveying platform may be directly attached to the rubber sheet feeding mechanism of the rear bogie, or may be attached to an independent support. In any case, a gap is provided between the rubber sheet conveying platform and the rubber sheet feeding mechanism of the rear bogie so that the rubber sheet can be hung down. In this way, when changing the setup, the already rolled-out sheet lead portion is pulled back by reversing the drive roll, and the rubber sheet is stored in a hanging state between the rubber sheet transport stand and the rubber sheet feeding mechanism. Can be. As a result, even when the rubber sheet of the front bogie and the rubber sheet of the rear bogie are used alternately, loss of rewinding or folding the sheet lead portion into a roll is eliminated. Since the rubber sheet is led (overhanged) over the front bogie, even when the rubber sheet of the rear bogie is in use, the front bogie can be changed underneath.

The measuring means of the cutting device measures the length of the rubber sheet corresponding to the size (outer periphery) of the target cylindrical rubber sheet (also referred to as slab), and measures the length of the rubber sheet feeding conveyor. It is provided with a sheet pressing means for synchronizing the drawing of the rubber sheet and a length measuring device (for example, a rotary encoder) for measuring a required length while conveying the rubber sheet.

The fixed size cutting means of the cutting device measures a predetermined length previously input to the magnetic card control system by a length measuring device, and receives the information to form a long rubber sheet into a predetermined length. Then cut it. The slicing means includes a slit of a slit plate that supports the rubber sheet from below, a pair of pressing plates that form a slit at a position corresponding to the slit, and a straight blade that passes through the slit and travels according to the slit. ing. The cut surface is a flat surface having no linearity so that it can be easily joined in a joint process that is a subsequent process, and a flat surface inclined with respect to the upper surface of the rubber sheet to increase a joint area. Required. In order to obtain such a cut surface, the cutting angle of the straight blade is designed to be inclined. The rubber sheet is sandwiched between the slit plate and a pair of holding plates on the upper surface to ensure linearity of the cut surface.

The sheet preheating means of the cutting device is provided at the downstream end of the cutting device over the entire width of the rubber sheet in the width direction, and is heated to a predetermined temperature by steam or electric heat. This is because the joint portion of the unvulcanized rubber sheet is preheated to a predetermined temperature so as to facilitate joining in the joint process.

The rubber sheet is pulled out to a predetermined length while supporting the front end of the rubber sheet by the front end clamping device, cut, and the preheated front end portion (joint portion) and the rear end portion are joined to form a joint portion. With that part facing up, it is hung on the lower crimping machine of the sheet joint device. The sheet joint device has a length equal to or greater than the length of the cylindrical rubber sheet (width of the long rubber sheet), and has an upper crimping machine and a lower crimping machine forming a pair, and is suspended between them. The joint of the cylindrical rubber sheet is pressed.

According to a second aspect of the present invention, in the splicing device, the sheet preheating means is provided at the downstream end of the cutting device in the flow direction of the rubber sheet so as to contact the lower end of the cut rubber sheet (the portion to be jointed). Provided. As a result, only the joint portion can be heated to the required temperature, so that the other portions are not heated, the rigidity of the rubber sheet as a whole is maintained, and the joint work is facilitated, and the predetermined temperature is maintained. There is no "burn". Further, even if the heating in the fixed-size cutting means is stopped in order to improve the collapse of the cut surface, the necessary heating of the rubber sheet joint can be performed.

According to a third aspect of the present invention, there is provided a splicing apparatus, comprising: a) a slit plate having a slit in a width direction of the rubber sheet to support the rubber sheet from below, and b) a slit plate above the slit plate. And a vertical pressing plate having a substantially T-shaped cross-section for holding the rubber sheet, and c) a pressing portion forming a slit corresponding to the slit of the slit plate in pair with the vertical pressing plate. It has an oblique pressing plate having a wedge-shaped cross-section and d) a straight blade that runs along the slit in the width direction of the rubber sheet. Since the vertical holding plate has a T-shaped cross section, even when the portion in contact with the rubber sheet is designed to be narrow, bending is prevented by applying pressure to the upper wide portion by providing rigidity. Since the oblique pressing plate has a wedge-shaped pressing portion, the straight blade can be made to travel while approaching the pressing portion and tilting. Further, for this purpose, the clearance of the rubber sheet can be adjusted when making a cut with a straight blade, thereby improving the cutting position accuracy and improving the surface shape of a cut section described later.

In the splicing device according to the fourth aspect, the width of the slit between the oblique holding plate and the vertical holding plate is formed such that both ends are narrow and the center is wide. That is, the concave portion is formed at the center of the ridge line facing the running path of the straight blade in the holding portion of the oblique holding plate. When the rubber sheet is sandwiched by the holding plate and the straight blade is cut into the cut end of the rubber sheet, the narrow slit is designed to prevent the rubber from escaping and stabilize the cutting position. When the straight blade travels a certain distance, the rubber has no escape area, the frictional force between the straight blade and the rubber increases, and the cutting surface may be roughened,
A concave portion is provided in the pressing portion of the oblique pressing plate, that is, the slit is widened to create a rubber escape area and reduce the frictional force. Even at the end of the straight blade travel, the rubber easily escapes outward (in the width direction). Therefore, the width of the pressing portion is increased again and the slit is narrowed to prevent the rubber from escaping. The rubber sheet pressed by such a pressing plate can be stably cut without any escape at the incision and the end point, and the rubber is appropriately released in the central portion to stabilize the running of the straight blade.

According to a fifth aspect of the present invention, the truck of the splice device is horizontally mounted on one or both of the shaft supports provided on the upper portion thereof so as to be pivotable upward with the upper end of the shaft receiving bracket as a fulcrum. A holding arm and a handle rotatable downward with the tip of the arm as a fulcrum and having a lock block at an end are attached. The holding arm is pivoted upward to mount the shaft, and then the holding arm is depressed to support the shaft rotatably and prevent it from jumping out. Further, a downwardly pivotable handle attached to the other end of the holding arm is provided with a lock block, and when the holding arm is depressed, the handle is locked by its own weight to the lock block attached to the shaft receiving bracket. When the handle is removed, the lock is released naturally by raising the handle, and the holding arm can be pivoted upward.

According to a sixth aspect of the present invention, there is provided a splicing device which is provided between the sheet feeding means and the measuring means, close to a position where the side end of the rubber sheet should pass, and which is parallel to and perpendicular to the flow direction of the rubber sheet. A meandering prevention means having a meandering prevention plate is provided. Since the meandering prevention plate is adjusted and attached to the position where the end of the rubber sheet should pass, the position of the side end of the freely hanging rubber sheet is adjusted to prevent the meandering. The meandering prevention plate is attached to one or both sides of the rubber sheet, and can be adjusted in position according to the width of the rubber sheet.

According to a seventh aspect of the present invention, there is provided a splice device, wherein the sheet pressing means of the measuring means is mounted so as to be able to turn horizontally about the upper portion of the frame of the rubber sheet feeding conveyor as a fulcrum, and a slide shaft is attached to the turning bracket. A weight roller supported at both ends so as to be able to ascend and descend through and rotate freely, and a roll hook for lifting or releasing the weight roller from the turning bracket. By locking the weight roller to the lifting roll hook by the handle, it can be separated from the rubber sheet below it to avoid turning, and by opening the roll hook, the weight roller presses the rubber sheet and presses the roll. Function as The swing bracket swings between the position crossing the rubber sheet and the outside of the side end of the rubber sheet,
Move the weight roller to a predetermined position. This makes it possible to safely and easily avoid the weight roller when replacing the rubber sheet.

According to another aspect of the present invention, there is provided a sheet joint apparatus for a splice apparatus, comprising: a lower crimping machine horizontally supported by a main frame; and an upper crimping machine parallel to the lower crimping machine and supported so as to be able to move up and down. It includes a board and an elevating cam for raising and lowering the upper crimping board, an upper crimping board elevating means having a pressurized upper plate, a pressurized lower plate and a slide shaft. The sheet joint device is a device for crimping an end portion (cut at an angle) of a rubber sheet cut to a predetermined size,
The end of the rubber sheet is abutted between the lower crimping machine and the upper crimping machine, and the upper crimping machine is lowered to perform crimping. The lifting / lowering cam rotates by supporting its axis at a predetermined height, thereby lifting and lowering a pressure upper plate and a pressure lower plate abutted on the upper or lower portion thereof so as to be vertically movable. The upper press platen is raised and lowered via a slide shaft interlocking with the upper plate and the lower press plate, and when it is located below, the upper press platen is pressed downward to press the rubber sheet into pressure.

[0029]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view schematically showing the overall configuration of the splicing apparatus of the present invention, and FIG. 2 is a side view of a sheet feeding means 52 in the present embodiment. FIG.
(A) is a side view of the fixed-size cutting means 51 according to the present invention, and FIG. 3 (b) is a plan view thereof.

As shown in FIG. 1, a rubber sheet 1 (in this embodiment, an unvulcanized rubber sheet having a thickness of 4 mm and a width of 280 mm) is wound into a roll with a liner interposed therebetween, and is fed out by a sheet feeding means. It is prepared by being mounted on a front bogie 11 or a rear bogie 52 at 52 and processed while moving in the direction of arrow X. In the configuration of FIG. 1, two front bogies 11 are prepared, and the rubber sheet 1 'prepared for one of them is used. Another front bogie 11 is waiting for another kind of rubber sheet. These front bogies 11 are rail 3
9 and is movable in the width direction (arrow Y direction), and is moved and replaced depending on the type of rubber sheet prepared according to the product. In addition, a rubber sheet 1 ″ wound in a roll shape is supported on the rear bogie 12, and is unreeled, and the rubber sheet 1 is extended to the tip of the rubber sheet transporting stand 14, and is in a hand waiting state. Is movable on the rail 40 in the length direction (arrow Z direction) of the rubber sheet 1 and is moved at the time of setup change.

The rubber sheet 1 fed by the sheet feeding means 52 is sent to a cutting device 56. The cutting device 56 is provided on the upper portion of the frame 35 with the rubber sheet feeding conveyor 18,
The fixed size cutting means 51, the roller controller 42 and the sheet preheating means 53 are mounted in this order. The rubber sheet feed conveyor 18 is a belt conveyor driven by a conveyor drive motor 38, supports the rubber sheet 1 on its upper part, and conveys it in the flow direction (the direction of arrow X). The moving length of the rubber sheet 1 is measured by providing the sheet pressing means 17 and the length measuring device 19 as the measuring means 57 on the upper surface of the rubber sheet 1. The sizing means 51 is a frame 35
And cut the rubber sheet 1 at a predetermined position in the width direction thereof. The roller controller 42 movably supports the cut rubber sheet 1, and has a sheet preheating means 53 at the tip end thereof. The cut end of the rubber sheet 1 is held above the sheet preheating means 53 for a predetermined time and heated to a predetermined temperature. The sheet preheating means 53 is provided as shown in FIG.
As shown in a partially enlarged perspective view, a heater plate 41 heated to 50 to 70 ° C. is provided, and the tip of the rubber sheet 1 is heated to a temperature suitable for a splicing operation. In addition, a control system 36 using a magnetic card in which predetermined items (designed cutting length and the like) are input in order to centrally control the operation related to the cutting is provided. To operate the rubber sheet feeding conveyor 1
8. The rubber sheet 1 is cut to a predetermined length by operating the fixed size cutting means 51 and the like.

The tip clamping device 54 and the sheet joint device 55 are operable by supporting means (not shown) so that the height for holding the rubber sheet 1 is substantially the same as the position of the sheet preheating means 53. Supported. The distal end portion (joint portion) of the rubber sheet 1 is clamped by the distal end clamping device 54, a predetermined length is drawn out, and the rubber sheet 1 is cut into a predetermined length by the fixed size cutting means 51. The upper crimping plate 43 of the sheet joint device 55 is moved upward by operating the lifting means by a foot switch (not shown), is separated from the lower crimping plate 44, and guides the leading end of the rubber sheet 1 to the gap. , Temporarily fixed, and further, the rear end portion of the rubber sheet 1 is abutted against the front end portion of the rubber sheet 1, and the upper press platen 43 is lowered, and these (the front end portion and the rear end portion) are pressed against each other, and the cylindrical rubber sheet 46 is pressed. Form.

The sheet feeding means 52 of the present embodiment, shown in a side view in FIG. 2, includes a front bogie 11 (only one is shown), a rear bogie 12 and a rubber sheet conveying hook 14, and a rubber It is provided close to the upstream side of the sheet feed conveyor 18. The front bogie 11 is, like the above-described conventional rubber sheet feeding bogie, axle-supported by a shaft support 70 (described later in detail) of the bogie frame 21, and is provided with a rubber sheet 1 from a roll 1 'wound around a liner 13'. The rubber sheet 1 is separated from the liner 13 ′ by the guide roll 24 and is supplied to the rubber sheet feed conveyor 18 of the cutting device 56 via the guide roll 25.
The liner 13 'is wound by the liner winding means 23. The front bogie 11 shown in FIG. 2 represents a state where use is interrupted, and in this state, the front bogie 11 can be moved in the width direction of the rubber sheet 1 and during the time when the rubber sheet 1 prepared on the rear bogie 12 is used. Changeover is possible.

The rear bogie 12 is located upstream of the front bogie 11
The rubber sheet is provided so as to be movable in the length direction. The rubber sheet transport platform 14 includes a drive roll 171 driven by a drive source (not shown) and a roller controller 65 at a downstream end thereof, and is mounted by a support (not shown) so as to bridge above the front bogie 11. I have. The support may be supported by an independent base, or may be supported by the frame 61 of the rear bogie 12. In the latter case, since the rubber sheet transporting platform 14 can be avoided on the upstream side together with the rear bogie 12, there is an advantage that the operation of the front bogie 11 is easy and the rubber sheet 1 can be moved with the rubber sheet 1 hanging down. The rear bogie 12 is provided with guide rolls 62 and 63 and a liner winding means 66 on which a rubber sheet 1 ″ wound in a roll shape around a frame 61 is provided. 14, a space is provided to provide a predetermined gap between the rubber sheet 1 and the guide roll 6.
4 and a first photoelectric sensor 15. Unwind the rubber sheet according to the progress of the rubber sheet processing on the downstream side,
Further, as described above, the pool of the rubber sheet 1 can be left when the setup is changed. It should be noted that the rubber sheet conveying platform 1
A space where the rubber sheet 1 hangs is also provided between the drive roll 171 of No. 4 and the rubber sheet feeding conveyor 18 of the cutting device 56, and a photoelectric sensor 16 for detecting the hanging rubber sheet 1 is provided. This is for adjusting the feeding amount of the rubber sheet 1 when the rubber sheet 1 is supplied from the front bogie 11. Further, a meandering prevention plate a (see FIGS. 1 and 9) described later can be attached to this space.

FIG. 2 shows a state in which the rubber sheet 1 "which is mounted on the carriage 12 is actually used, and the rubber sheet 1 is indicated by a thick solid line.
4, the rubber sheet 1 is hanging down by an appropriate amount between the rubber sheet feeding conveyor 18 and the driving roll 171. The latter drooping situation is the second
It is checked by the photoelectric sensor 16, the driving roll 171 is started when the rubber sheet 1 comes to the position shown by the broken line, and stopped when the second photoelectric sensor 16 is blocked, so that the play amount of the rubber sheet 1 is appropriately adjusted. The amount has been adjusted. The amount of the rubber sheet 1 between the former, that is, the rubber sheet transporting pedestal 14 and the rear carriage 12 can be adjusted by driving the liner winding means 66 and winding the liner 13 when the first photoelectric sensor 15 is not shut off. When the sheet 1 is fed out and cut off, the liner winding means 66 is stopped.

In FIG. 2, a thick dotted line between the rubber sheet conveying rack 14 and the guide roll 63 indicates a sheet lead portion L (the fixed-size cutting means 51 and the driving roll 17 at the time of setup change).
1) and the driving roll 1
Reference numeral 71 denotes a state in which the pullback is performed. When switching the type of the rubber sheet 1, it is necessary to pull back the sheet lead portion L to the position of the drive roll 171. The rubber sheet 1 having a length corresponding to the sheet lead portion L is hung down to a position shown by a thick dotted line. store. Even if the roll 1 ″ on which the rubber sheet prepared on the rear bogie 12 is wound in this way is in use, the rubber sheet 1 is led beyond the front bogie 11 by the rubber sheet conveying platform 14, so that
Preparation work of the front bogie 11 can be performed below. The rubber sheet 1 placed on the rubber sheet feed conveyor 18 is
It is pressed by a pressing roll 17 (described later in detail), moves in synchronism with the rubber sheet feeding conveyor 18, moves while its length is measured by the length measuring device 19, passes through the fixed size cutting means 51, and is clamped by a tip clamp. It is sent to a sheet joint machine (see FIG. 1).

The slicing means 51 (FIG. 1) corresponds to FIG.
As shown in the side view (partial cross section), a slit plate 5 that has a slit 30 in the width direction of the rubber sheet 1 and supports the rubber sheet 1 from below, and the rubber sheet 1 is A vertical holding plate 3 having a substantially T-shaped cross section and a slanting holding plate 2 having a wedge-shaped cross section and a pair of slits 31 formed along the slits 30 and 31. And a straight blade 4 running in the width direction. As shown in the plan view of FIG. 3B, the pressing portion 68 of the oblique pressing plate 2 forms the concave portion 6 in the center portion and the slit 31 between the pressing portion 67 of the vertical pressing plate 3 and the pressing portion 67. The width is designed to be narrow at both ends and wide at the center. Further, the lengths of the oblique holding plate 2 and the vertical holding plate 3 are designed according to the width of the rubber sheet 1,
In the present embodiment, the width of the target unvulcanized rubber sheet is 280 mm, the thickness is 5 mm, and the dimensions of the oblique holding plate 2 are 380 mm in total length, and the lengths of the wide portions at both ends are respectively The length was 100 mm (the length in contact with the rubber sheet was 50 mm each), and the step of the central concave portion 6 was 2 mm.

FIG. 3A shows the state of the rubber sheet 1 at the start of cutting.
The straight blade 4, which is sandwiched between the vertical pressing plate 3 and the oblique pressing plate 2 and supported by the holder 28, approaches the side end of the rubber sheet 1. The straight blade 4 is attached at an angle θ with respect to the upper surface of the rubber sheet 1. When the straight blade 4 is run, the tip of the rubber sheet 1 is cut into a wedge shape. This is for increasing the joint area by increasing the joint area. When the straight blade 4 travels, the slit 31 is narrow at the running start portion and the escape of the rubber is suppressed, and at the center portion, the concave portion 6 is formed in the pressing portion 68 of the oblique pressing plate 2 so that the rubber easily escapes, and friction is caused by friction. The roughening of the rubber cutting section is prevented. At the end, the slit 31 is narrowed to prevent the rubber from escaping. When the cutting is completed, the vertical pressing plate 3 and the oblique pressing plate 2 move to the upper and lower dashed line positions respectively, the straight blade 4 is returned to the starting position, and the rubber sheet 1 is fed by one pitch. The oblique holding plate 2 and the vertical holding plate 3 are lowered to hold the rubber sheet 1, and one cycle of the cutting operation is completed. The crushed length of the cross section of the rubber sheet cut under these conditions (the length in which the rubber of the rubber cross section was roughened and scraped off) was 5 mm (about 20 mm when cut with a conventional pressing plate). The linearity of the rubber cut section was improved by reducing the crush length.

As shown in FIG. 1, the sheet preheating means 53 has a heater plate 41 attached to the downstream end of the cutting device 56 and is heated by electric heating or steam. FIG.
As shown in the partially enlarged perspective view of FIG. 2, the tip of the cut rubber sheet 1 has a wedge shape with a flat lower surface, and is held at a predetermined temperature (60 ° C.) by holding the tip along the upper portion of the heater plate 41. 〜65 ° C.). In addition, since the rubber sheet 1 (thickness: 2 to 8 mm in the present embodiment) is heated only from the lower surface, the heating time is longer, but the heating time is designed in accordance with the cycle time (about 18 minutes in the present embodiment) and slowly uniform. Heating is effective, so that the joint strength of the joint is stabilized. Therefore, cracking of the joint portion of the completed slab does not occur.

FIG. 8A shows a side view of the shaft support 70 of the front bogie 11 and the rear bogie 12 of the present invention, and FIG.
2 shows a front view of the shaft support 70 of the front bogie 11 shown in FIG. The shaft support 70 is
A portion for supporting the shaft end of the bogie frame 21. The box shaft 114 is supported on two bearings 115 by a shaft receiving bracket 110 attached to the bogie frame 21. At one end, a holding arm 111 supported by a hinge 119 is attached to a shaft receiving bracket 110. At the other end of the holding arm 111,
A handle 112 having a lock block 113 at the bottom,
It is pivotally mounted by a hinge 120. In addition, the lock block 113 is the shaft receiving bracket 1.
The holding arm 111 is fixed by fitting with a lock block 113 ′ attached to 10. When opening the box shaft, the lock block 113 is opened by lifting the handle 112 upward, and the holding arm 1 is opened.
11 can be opened upward. A cushioning material 118 such as a gunmetal is attached to the holding arm 111 to reduce the play of the box shaft 114.

FIG. 9 is a plan view of the meandering preventing means 121. The meandering preventing means 121 is located between the sheet feeding means 52 and the scale measuring means 57 shown in FIG. 1 and is provided at a position a indicated by a square dotted line. Is preferred. The meandering preventing means 121 has a meandering preventing plate 122 which is attached near the position where the side end 126 of the rubber sheet 1 should pass, and which is parallel to and perpendicular to the flow direction of the rubber sheet 1. More specifically, a shaft 127 rotatably supported by a pair of brackets 125 horizontally mounted on the frame 35 (see FIG. 1), and a guide roll 123 (rubber sheet 1) mounted substantially at the center of the shaft 127. ), And meandering prevention plates 122 and 122 ′ attached to both sides of the guide roll 123. Since the meandering prevention plate 122 is adjusted and attached to a position where the side end 126 of the rubber sheet 1 should pass, the side end 126 of the rubber sheet 1 which is hung down can be adjusted to a predetermined position. Prevent its meandering.

FIG. 10 is a side view of the sheet pressing means 17 of the splicing apparatus according to the present invention, and FIG. 11 is a plan view thereof. The sheet holding means 17 includes the swing bracket 13
0, a weight roller 99, a roll hook 140, and a locking means 142.

The turning bracket 130 is mounted on the frame 35.
(See FIG. 1) With the support shaft 138 vertically attached above the fulcrum, it is horizontally (in the direction of arrow R) pivotably mounted (see FIG. 11), the position crossing the rubber sheet 1 and the position of the rubber sheet. Swivel between the outside of the side end. A roll mounting bracket 141 is attached to the turning bracket 130, and the roll mounting bracket 141
In addition, a handle 132 is provided at the upper part, and the weight roller 9
A pair of slide shafts 131 supporting a roll support frame 145 on which the rotatable member 9 is rotatably mounted is held so as to be able to move up and down. The roll hook 140 includes a hook 138,
It has a hook bar 139 and a roll lowering lever.

FIG. 10 shows a state in which the weight roller 99 is released and the rubber sheet 1 is pressed. When the weight roller 99 is lifted by manually pulling the handle 132 upward, the hook bar 139 rises while pushing and expanding the hook claw 138, and when reaching the upper side thereof, the hook claw 13.
(The other end of the hooking claw 138 is urged in the opposite direction of the arrow P by a spring 143 with a fulcrum (not shown) interposed therebetween). In this way, the weight roller 99
The swinging bracket 130 is swung in a state in which the rubber sheet 1
When replacing the weight roller 9 safely and easily
9 can be avoided. After replacing the rubber sheet 1, the swing roller 130 is moved to a predetermined position crossing the rubber sheet 1, and the roll lowering lever 133 is pushed in the direction of arrow P to release the hook bar 139, whereby the weight roller 99 is lowered. Press down the rubber sheet 1.

As the lock means 142, a stopper 136 and an upper lock jig 134 mounted on the upper part of the frame 35, a lower lock jig 135 mounted on the turning bracket 130, and a lock release lever 137 supported by the roll support frame 145. Having. FIG. 10 shows a state in which the turning bracket 130 is locked to the frame 35. The turning bracket 130 contacts the stopper 136, and the upper lock jig 134, which can turn up and down (in the direction of arrow Q) with the pin 144 as a fulcrum, moves downward. It is fitted to the lock jig 135. To release, the lock release lever 137 moves upward by pulling the handle 132 upward, and simultaneously lifts the upper lock jig 134 to release the engagement with the lower lock jig 13.

The seat joint device 55 used in the splicing device of the present invention shown in FIG.
, A lower press platen 44 supported horizontally horizontally, an upper press platen 43 parallel to the lower press platen 44 and supported so as to be able to move up and down, and an elevating cam 86 for moving the upper press platen 43 up and down. , An upper pressing machine 87 having a pressing upper plate 87, a pressing lower plate 88 and a slide shaft 85.

The sheet joint device 55 is a device for crimping an end portion (cut in an inclined manner) of a rubber sheet (not shown) cut to a predetermined size, and includes a lower press platen 4 and an upper press plate. 43, the end of the rubber sheet is abutted, and the upper pressing plate 43 is lowered to be pressed. The lifting cam 86 is supported by its axis (cam center shaft 91) at a predetermined height and rotates, so that the lifting and lowering cam 86 abuts on the upper and lower sides thereof and is mounted so as to be vertically movable and connected by a pair of slide shafts 85. The upper plate 87 and the lower press plate 88 are moved up and down, and the upper press platen 43 interlocked with the upper plate 87 is moved up and down. When the upper press platen 43 is located below, the rubber sheet placed on the lower press platen 44 is pressed. The open ends of the cam support frame 92 and the lower crimping plate 44 are connected or opened by an extendable lock handle 94 between the handle support plate 93 and the lock pin 95. The rubber sheets are connected when they are pressed together to prevent distortion of the lower press platen 44 and the like, and are opened when the pressed rubber sheet is removed. A compression spring 84 connected to the lower part of the slide shaft 85 is provided between the lower press plate 88 and the upper press platen 43, and the thickness and type of the rubber sheet are adjusted by adjusting the position of the height adjustment nut 150. Adjust the change in the crimping force due to the pressure. An upper cam follower 89 and a lower cam follower 90 are attached to the contact points between the lifting cam 86 and the pressing upper plate 87 and the pressing lower plate 88, respectively. This is to reduce the lateral force caused by the rotation of the lifting cam 86.

[0048]

As is apparent from the above description,
The splicing device of the present invention has an excellent effect such as scraping.

The splicing apparatus according to the present invention has the effect of reducing the loss of material and working time when setting up a rubber sheet to be processed, and reducing the roughness of the cut surface of the rubber sheet. . In detail, by providing a rear bogie and a rubber sheet transport platform, the loss of material, work time, etc. due to rewinding or folding of the rubber sheet at the sheet lead part, which was necessary in conventional setup change, is greatly reduced This is particularly effective when a splicing operation is performed while replacing many types of rubber sheets many times.

The sheet preheating means of the splicing device according to the second aspect heats the rubber sheet to a predetermined temperature during the waiting time by guiding the tip of the cut rubber sheet onto the heater plate. be able to. In addition, even if heating by the sizing and cutting means becomes unnecessary due to the improvement of the sizing and cutting means, the end of the rubber sheet can be heated. And the joint effect (joining force) can be stabilized.

According to a third aspect of the present invention, in the splicing device, the oblique holding plate has a wedge-shaped cross section.
Even if the cut end portion of the rubber sheet is tapered and cut, it can be held down to near the front end of the rubber sheet. By making the cross section of the vertical pressing plate a T-shape, the bending effect (insufficient pressing force at the center) in the width direction of the rubber sheet is reduced in the upper wide portion. By using both, it is easy to adjust the slit width between them.

According to the fourth aspect of the present invention, the fixed size cutting means of the splicing device has the concave portion provided at the center of the pressing portion of the oblique pressing plate, so that the rubber pressed by the straight blade at the time of cutting can easily escape (the straight blade). The thickness of the rubber sheet needs to escape). As a result, the problem of roughening or crushing of the cut surface caused by the conventional cutting means has been solved.

The shaft support of the splicing device according to the fifth aspect holds the shaft set on the carriage in a rotatable manner, can be opened and closed with one touch, and is set securely, so that the shaft can be securely mounted during operation. There is no risk of the shaft coming off.

According to the meandering prevention plate attached to the splicing device according to the sixth aspect, the rubber sheet hanging down for adjusting the feed amount does not sway, and troubles such as wrinkling of the rubber sheet due to the swaying are prevented. Disappears.

In the splicing apparatus having the sheet pressing means according to the seventh aspect, when changing over the rubber sheet, the weight roller can be easily and safely avoided without greatly lifting the weight roller upward.

In the sheet joint device of the splicing device according to the present invention, a stable pressing force is applied irrespective of a change in the thickness and the type of the rubber sheet by the upper pressing device using a rotating lifting cam. be able to. Also, the device is simplified.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an overall outline of a splicing device of the present invention.

FIG. 2 is a side view of the sheet feeding means according to the embodiment of the present invention.

FIG. 3 (a) is a side view of the slicing means according to the present invention, and FIG. 3 (b) is a plan view thereof.

FIG. 4 (a) is a side view of a fixed-size cutting means used in a conventional splicing apparatus, and FIG. 4 (b) is a plan view thereof.

FIG. 5 shows a perspective view of a sheet preheating means of the splicing device of the present invention.

FIG. 6 is a perspective view of a sheet pressing means of a conventional splicing device.

FIG. 7 shows a side view of a shaft support of a conventional splicing device.

FIG. 8 (a) is a side view of a shaft support of the splice device of the present invention, and FIG. 8 (b) is a front view of the shaft support of the splice device of the present invention.

FIG. 9 is a plan view of meandering preventing means of the splicing device of the present invention.

FIG. 10 shows a side view of a sheet pressing means of the splicing device of the present invention.

FIG. 11 shows a plan view of a sheet pressing means of the splicing device of the present invention.

FIG. 12 shows a perspective view of a seat joint device of the splicing device of the present invention.

[Explanation of symbols]

 1: Rubber sheet 2: Diagonal holding plate 3: Vertical holding plate 4: Straight blade 5: Slit plate 6: Concave 11: Front bogie 12: Rear bogie 13: Liner 14: Rubber sheet transport hook 17: Drive roll 18: Rubber Sheet feed conveyor 19: Length measuring device 21: Frame 23: Liner winding motor 24, 25: Guide roll 30: Lower slit 31: Upper slit 35: Frame 36: Control system 37: Operation panel 41: Heater plate 44: Lower Side crimping machine 51: fixed size cutting means 52: sheet feeding means 53: sheet preheating means 54: tip clamping device 55: sheet joint device 56: cutting device 57: measuring device 70: shaft support 86: elevating cam 99: weight Roller 112: Holding arm 122: Meandering prevention plate 130: Swivel Racket

Claims (8)

[Claims] 1. A splicing device for cutting a long rubber sheet into a predetermined length and joining it in a cylindrical shape, wherein the front bogie is movable in a width direction of the rubber sheet, and a length of the rubber sheet. A sheet feeding means having a rear carriage and a rubber sheet transporting stand movable in a direction, a measuring device having a measuring means, a fixed-size cutting means, and a sheet preheating means, and crimping both ends of the cut rubber sheet. A splice device comprising a seat joint device. 2. The cutting device according to claim 1, wherein the sheet preheating means is provided at a downstream end of the cutting device in a flow direction of the rubber sheet and is in contact with a lower end of the cut rubber sheet. The splicing device as described. 3. The slitting means has a slit in a width direction of the rubber sheet and supports the rubber sheet from below, and holds the rubber sheet above the slit plate. A vertical holding plate having a substantially T-shaped cross-section; and an oblique holding plate having a wedge-shaped cross-section of a holding portion forming a slit corresponding to the slit of the slit plate in pair with the vertical holding plate. The splice device according to claim 1, further comprising a straight blade that travels in a width direction of the rubber sheet along the slit. 4. The splicing device according to claim 1, wherein a width of the slit between the oblique pressing plate and the vertical pressing plate is formed such that both end portions are narrow and a central portion is wide. 5. A holding arm which can be turned around an upper end portion of a shaft receiving bracket as a fulcrum, and is turned downward about a tip of the holding arm as a fulcrum in any one of the shaft supports provided on the upper part of the front bogie and the rear bogie. A splice device according to any of the preceding claims, wherein the splice device is provided with a handle which is possible and has a lock block at the end. 6. A meandering prevention device which is provided between the sheet feeding means and the measuring means, and which is close to a position where a side end of a rubber sheet should pass, and which is attached vertically and parallel to a flow direction of the rubber sheet. The splicing device according to any one of claims 1 to 5, further comprising a meandering preventing means provided with a plate. 7. A sheet holding means of said measuring means, wherein said sheet holding means is pivotally mounted horizontally on an upper part of a frame of a rubber sheet feeding conveyor as a fulcrum, and said sheet holding means is vertically movable through said sliding bracket via a slide shaft. The splicing device according to any one of claims 1 to 6, further comprising: a weight roller rotatably supported at both ends; and a roll hook for lifting or releasing the weight roller from the swing bracket. 8. A lower crimping machine horizontally supported by a main frame and an upper crimping machine parallel to the lower crimping machine and capable of ascending and descending above the lower crimping machine. The splicing apparatus according to any one of claims 1 to 7, further comprising: an elevating cam for elevating and lowering the upper crimping plate, an upper crimping plate raising / lowering means having a pressurized upper plate, a pressurized lower plate, and a slide shaft.