JPS61164797A - Cutter for raw rubber sheet containing cord - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for cutting corded raw rubber sheets for tires.

(Conventional technology 1 problem) Many proposals have already been made regarding a cutting device for corded raw rubber sheets for tires, and furthermore, a device for wrapping the raw rubber sheet after cutting into one roll to be supplied to a forming drum. In the case of radial tire molding, which requires particularly high cutting precision when automatically wrapping the raw rubber sheet around the ram, (
α) When cutting the corded rubber sheet, the cut portion is deformed and a straight line at the cut end cannot be obtained. (A) In the case of a raw rubber sheet with steel cords, the cutter may get caught on the steel cords, resulting in poor cutting. (01
In the case of Textile Coat 9 raw rubber sheet, the sheet has a weak stiffness, and in the case of steel cord belt (or breaker) material, due to the quirks of Coat 9 before rubberization (because it is wound on a reel), etc., it is difficult to cut it straight. However, the cut portion is likely to be deformed (particularly the acute angle S) during the hand cylinder onto the forming R ram, forcing the forming operator to rework the splice portion. There are other problems.

(Objective of the Invention, Means for Solving the Problems) The present invention was developed in order to deal with the above-mentioned problems in the conventional corded rubber sheet cutting devices, and the present invention was developed in order to solve the above-mentioned problems in the conventional corded rubber sheet cutting devices. a cutting mechanism consisting of a pair of cutters having rounded tips that are integrally stuck into the cutting center of the raw rubber sheet with a cord inserted therein and separated to cut the raw rubber sheet; and a cutting mechanism that presses the raw rubber sheet onto the table. The structure is characterized by a clamp transport mechanism that clamps the cut end of the raw rubber sheet and transports the cut end of the raw rubber sheet onto the output roller. By providing a rounded shape and piercing the raw rubber sheet with the cord, the cutter can be inserted securely between the coats 9, and the clamp conveyance mechanism presses and clamps the raw rubber sheet of the coat 9 on the table during cutting, and the pair of cutters By cutting at a distance from each other, a straight line of the cutting line is ensured, and by conveying the cut end of the raw rubber sheet onto the exit conveyor using the ramp conveyance mechanism, deformation of the cut end is prevented and conveyance accuracy is increased. Therefore, it is an object of the present invention to provide a cutting device for corded raw rubber sheets, which has significantly improved cutting accuracy, performance, and reliability, and eliminates the above-mentioned problems.

(Embodiment of the invention) An embodiment of the present invention is shown in FIGS. 1 to 7,
In Fig. 1, the container is a forming drum, (Bl is an exit conveyor, (O is a cutting mechanism, (D) is an entrance conveyor, (6) is a corded raw rubber sheet, and (G) is a plylet off. A drive device, a control device, etc., which are not shown, are attached.

Furthermore, to explain in detail the exit conveyor (), as shown in FIG. B)
1) The conveyor belt Qυ is driven to run by a variable speed motor such as a pulse motor (not shown), and a guide is mounted on the rail ae fixed on the common base (5).
A moving table is slidably placed on the moving table a through the pin (17), one end of the moving table a is connected to the conveyor frame α9 by a pin (11), and the other end of the moving table a8 is , its bracket) (18α) and the conveyor frame (
Is is connected to the fluid pressure cylinder (211 by the pin (a), and the common base (5) and the moving table a8
between the bracket (18α) and the fluid pressure cylinder (c).
are connected to each other, and the moving platform is moved on the rail ae by a hydraulic cylinder (to), and the exit conveyor (B) is moved along with it.
) to the forming drum and the tail roll Qz side of the cutting mechanism (which can move forward and backward (left and right as shown) to the Q side and is on the exit conveyor by the fluid pressure cylinder c! The sheet (G) is fed into the forming drum (A) and wound thereon.

In addition, a photoelectric switch (■) facing the conveyor belt aD and a raw rubber sheet length detector (to) are installed on the bracket C241 erected from the conveyor frame α9. The detector (c) is configured to detect the length of the coat 9 raw rubber sheet (g).

In detail, the entrance conveyor (D>) includes a conveyor frame (2) fixedly mounted on a common base (5) by a bracket (to), a conveyor belt with a four-way belt, and a pulse motor (not shown). The conveyor belt 4 is driven and driven by a variable speed motor.

Furthermore, to explain the cutting mechanism (C) in detail,
In particular, as shown in Figures 2 to 7, the U-shaped frame (2
) is rotatably fitted into the pin 0υ of the beam (5a) of the common base (5), and
Slide the slide plate (G) fixed to the bottom surface of the mold frame (T) on the top surface of the common base (5) and
The U-shaped frame O3 is rotated in a horizontal plane around a pin c31) by an appropriate drive machine (not shown).

A pair of semi-circular hollow tables (see especially Figures 2 and 7) are mounted on the upper surface of the pedestal fixed on the U-shaped frame (34α) via a plurality of legs (34α). ) are fixed with bolts etc., a gap is provided between the tables CLDaSJ, and a large number of air discharge holes (not shown) are provided on the upper plate side of the table can, and the gaps will be described later. It is configured with a cutter passage groove.

In particular, as shown in Figure 3, both branch offices of the U-shaped frame 03 (
32C) (32C) tlc fixed sale = v-le G
An elevating frame G9 is engaged and arranged via the elevating frame G9, and the elevating frame G9 has a support column (32e).
Bracket C32CL) (see Figure 1) The fluid pressure cylinder (4CI lot 9) is connected to the
The elevating frame (to) is lifted and lowered by the fluid pressure cylinder (4G).

In particular, as shown in Figures 2 and 3, a pair of cutter stands (43) are placed on the rails (4D) fixed to the sides of the elevating frame (ELL) via guide holes, and A pulley Q) is attached to a pair of shafts (C) which are rotatably mounted on the upper part of the shaft (C) by bearings (C) (see Figure 3).
(4D is fixed and the cable (41) of the air cylinder (c) for cable operation is fixed on the lifting frame
After the hook is passed to the pulley un (4n), the cutter table (
The cutter table (43t44) is connected to the bracket 6υ of 43 (Incorporated), and the cutter table (43t44) is guided to the rail I and moved away from or approached via an air cylinder (41 is a cable decoy, bracket 606).

A cutter (foundation) is attached to the old cutter table via a spring 52.
) is bolted (g), and the heater (5e6?) is attached.
is attached, and the tip of the cutter is the fourth
As shown in the figure, it is asymmetrical, and the cutta (ro) egg is
It has a cutting part (54α) (55α) of the corded raw rubber sheet and is finished sharply as shown in Figure 5, but the tip on the side of the cutter 5 is long and has a sharp finish as shown in Figures 4 and 6. A rounded part (54k) is provided, and as shown in FIG.
54b) sticks into the cut center of the corded raw rubber sheet (G), and then the cutter (G) moves in a direction to separate from each other and cuts the sheet (G) with the cutting parts (54α) and (55α). At the same time, the rounded part (
The radius of curvature of 54A) is larger than the diameter of the wire or stranded wire constituting the cord.

Furthermore, similarly to the U-shaped frame C33, as shown in FIG.
The boss part (61
The guide beams are swingably connected, and the boss (61b) provided at the other end of the guide beam swings to the bracket 14 fixed to the U-shaped frame G3 and frame 04 via a pin connection. Freely connected, U type 7V-AC321
Side peer c31), said Hifu 61G I I6I#I
The dimensions are such that each center of +631 forms a parallelogram, and the link 51 also swings as the U-shaped frame O3 swings, but the pair of guide beams 6υ always remain parallel. It has a structure.

In addition, the guide is attached to the rail fixed on the guide beam.
The movable architrave is movably arranged via the guide rod Ii?, which is erected on the movable architrave. )! ? ), both ends (68tz) of the transport beam are slidably attached, and the transport beam is floated and biased by springs interposed between the moving platform and both ends (68t0L) of the transport beam. A fluid pressure cylinder (158) is installed at the top of the U-shaped frame 03.
When the conveying beam branch is positioned below the conveying beam branch, the conveying beam trowel is lowered by the rod of the hydraulic cylinder (158) against the spring b field.

In addition, by simultaneously driving a pair of threaded rods συaυ screwed together with female screws CIz provided on the moving table by a variable motor such as a Notaka Lus motor, the conveyor beam branch can be connected to the cutter mechanism (Q side or exit conveyor (Bl side) At the same time, a crank rod σO is fixedly installed on the conveyor beam, which incorporates suction means such as an electromagnet and a vacuum cup (known technology), and the cord is reciprocated onto the table. The sheet (E) is pressed by a clamp mechanism and a clamp transport mechanism that grips the cut raw rubber sheet (G) and transports it onto the exit conveyor (Bl).

(Function) The embodiment of the present invention has the above-mentioned structure, and to explain its function, as shown in FIG. (
If the U-shaped frame C33 is oscillated and adjusted in advance so that the running line (Ei) f: for example (A'-A') corresponds to the code direction in G), that is, the court 9 angle, then the configuration As is clear from the explanation, the reference line (lower) of crank rod 4 is synchronized and the running line (A'-I'
) is parallel to (mouth'-mouth').

The corded raw rubber sheet (G) sent from the plylet off (G) side is the inlet conveyor and the outlet conveyor CB.
), the tip of the coproduced rubber sheet (g) is detected by the photoelectric switch (2), and upon this detection, the detector@bt starts measuring the length, and when the measured length reaches a predetermined value, the inlet , the exit conveyor (to) (B) is decelerated, while the crank rod ffe moves along the reference line (mouth'-mouth'
) is moved to a position that almost coincides with the cutting line (A'-A'), and when the )@ of the conveyor stops, the rod of the hydraulic cylinder (158) is lowered and the cylinder head is moved. When activated, the elevating frame (to) descends, and is pushed by the rod of the fluid pressure cylinder (158) to clamp the clamp rod C.
I (lI) descends and presses and clamps the raw rubber sheet (5) on the table (g).

When the clamping is performed, the pressing is performed by the hydraulic cylinder (i
The rod of ss) is pushed back, and the °C lifting frame (to) further lowers, and as shown in Fig. 4, the cutters (b) and (g), which are closely integrated, cut the cord-filled rubber sheet (6).
It pierces approximately the center of the planned cutting line.

Since a rounded part (54A) is provided at the tip of the cutter 15, the raw rubber sheet part)
Even if it comes into contact with the inner cord, the rounded part (5
4, 6) escapes (by spring 52) between the cords and the cutter 6
4) CSI is inserted.

When the cutter 1546!9 is inserted into the raw rubber sheet (G) and the lowering of the lifting claim C31 is stopped, the cutter base 1, that is, the cutter 64 is operated by the air cylinder (C).
1651 moves in the opposite direction, that is, moves apart, and the cutting portions (s4a) (55α) of the cutters (B) and (G) cut the raw rubber sheet along the traveling M (A'-A'), that is, along the cord. do. When the cutting is completed, the exit conveyor (Bl) is restarted and the cut coated rubber sheet stamp on the same conveyor (B) is conveyed, and the tip of the stamp approaches the tail roll 0 and stops, and the stitcher, etc. If there is no interference with the device (not shown), the fluid pressure cylinder (
c) is activated, the exit conveyor (B) is moved, and its tip is at the dotted line position shown in Figure 1. During this time, the air cylinder (c) is activated in reverse, and the cutter (541 The hydraulic cylinder @O is also reversely operated to raise the elevating frame (T), and the crank rod a1 grips the cut end of the raw rubber sheet (T) by the spring lock and moves up.

The tip of the exit conveyor (B) reaches the bottom of the forming drum as shown by the dotted line in Figure 1, and the tip of the raw rubber sheet (G) on the conveyor (B) is near the top of the tail roll mill. When the conveyor reaches the point where the raw rubber sheet (5 ) is the forming drum (3
), the conveyor bell (11) of the exit conveyor (B) and the surface velocity b in the forming drum are driven in synchronism so that the cut coat 9 raw rubber sheet (T) By means such as providing a large number of small protrusions on the surface of the forming drum (conveyor bell) (19), side slipping of the corded raw rubber sheet (T) on the belt is prevented, and the conveyor belt is wound onto the forming drum. The system allows the winding to be carried out accurately, and the detachment from the belt during winding is enhanced.
A means to prevent the belt from meandering is provided, and the entrance conveyor (D)
A center line ymmtzt of a raw rubber sheet (g) can be provided at the entrance of the tube.

When the winding of the cut corded raw rubber sheet onto the forming drum is completed, the tail roll (
13 side is lowered, the traveling of the conveyor bell Hυ is stopped, and by the reverse operation of the fluid pressure cylinder (2), the output roller conveyor (G) is returned to the cutting mechanism (Q side and stopped).

After that, when continuing the next cutting (when forming the next tire), the threaded rod σBb is cut using Tanabata (not shown).
= The crank rod σe, which is driven and gripped at the cut end of the cord-filled raw rubber sheet (T), starts moving toward the forming column 9, and the inlet and outlet conveyors (Bl (D) are synchronized (same speed)). The cut end is conveyed moderately onto the clamp rod (grasped by ill and exit conveyor CB), the clamp rod σ [, the conveyor (Bl (D)) stops, and then the clamp rod decoy is The cut end of the corded raw rubber sheet (g): Release, and the lamp rod ffl is
Returning to the starting position (mouth'-mouth'), each of the above operations is repeated in sequence.

(Effects of the Invention) As described above, in the present invention, a pair of cutters are integrally thrust into the cut center of the corded raw rubber sheet clamped on the table, and then separated and cut into the raw rubber sheet. Since the tips of the pair of rod-shaped cuts are rounded, the cutter accurately pierces between the coats 1 and 9 of the raw rubber sheet with the coat 9 inserted, and the pressing is easy. The clamped cord-filled rubber sheet is cut by separating the pair of cutters, and the cutting line becomes straight, thereby significantly improving cutting efficiency and cutting accuracy.

Furthermore, the corded rubber sheet is pressed and clamped on the table by the clamp conveyance mechanism, and
In order to grasp the cut end and convey it onto the exit conveyor,
By preventing deformation of the cut ends, positioning the cut raw rubber sheet on the exit conveyor, and furthermore, transporting it and wrapping it around a forming drum, etc., the transport performance and reliability are significantly improved.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments, and that various design modifications can be made without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

FIG. 1 is an overall side view showing one embodiment of the present invention;
is a cross-sectional view taken along the ■-■ arrow in Figure 1, and Figure 3 is a cross-sectional view taken along the arrow 1-■ in Figure 2.
1 is a cross-sectional view taken from arrow 1. Figure 4 is an enlarged view of part ■ in Figure 2.
The figure is a cross-sectional view of the v-■ section in Figure 4, and Figure 6 is a cross-sectional view of the section v-■ in Figure 4.
7 is a cross-sectional view of the section ■-■ in FIG. 2. B: Exit conveyor C: Cutting mechanism D: Entrance conveyor E: Co-F raw rubber sheet 3
5: Table 54.55: Katsuta 54α, 5
5α: Cutting part 54b: Roundness (roundness part) 70: Clamp conveyance mechanism (crank rod) Sub-agent Two patent attorneys and non-Kaimoto important researchers Figure 7 A

Claims (1)

[Claims] a cutting mechanism consisting of a pair of cutters having rounded ends that are integrally stuck into the cutting center of a corded raw rubber sheet pressed and clamped on a table and separated to cut the raw rubber sheet; and the raw rubber sheet. A corded raw rubber sheet cutting apparatus comprising: a clamp conveyance mechanism that presses and clamps the raw rubber sheet onto the table, grasps the cut end of the raw rubber sheet, and conveys the raw rubber sheet onto an exit conveyor.