JP2000301626A - Conveying and perforating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the snapping or bending of a needle while reduction of the diameter and elongation of the length of the needle are contrived and upgrade the holing-through accuracy of a through hole and the appearance quality thereof. SOLUTION: This conveying and perforating device is equipped with a conveying means 2 for conveying a tire rubber member G intermittently and a perforating means 3 for forming a through hole H in the tire rubber member G. The perforating means 3 has a receiving plate 4 for receiving the lower face of the tire rubber member G and a perforator 5. The perforator 5 comprises a pressing plate 23 which presses the tire rubber member G to the receiving plate 4 during descending and a plurality of needles 19 for forming holes running through the tire rubber member G in the descent, mounted on a lift table 22. In addition, dimplelike recessed parts 36 for anti-pressure sensitive adhesion are formed on the receiving face 4S of the receiving plate 4 and the pressing face 23S of the pressing plate 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transport punching device for forming a through hole for venting air in a tire rubber portion in order to exhaust air pockets that are likely to be generated between tire rubber members in a green tire molding process.

[0002]

2. Description of the Related Art In a green tire molding process, a belt-shaped tire rubber member such as an inner liner rubber, a carcass, a bead rubber, a side wall rubber, a breaker, a tread rubber, or the like is formed by laminating and sticking.
Therefore, an air pocket is easily generated between the tire rubber members overlapping inside and outside, which causes a decrease in durability and uniformity of the finished tire.

Therefore, as shown in FIG. 10, a large-diameter tire rubber member G such as a carcass, a side wall rubber, a tread rubber or the like, in which air accumulation is particularly likely to occur, is generally provided with a through hole H for air release. are doing.

Conventionally, as shown in FIG. 11, the through hole H is formed by using a rotary needle a having a plurality of needles a1 implanted around the tire rubber member G which is continuously conveyed. The rotation of the rotary needle a causes the tire rubber member G to rotate.
, Through holes H are sequentially formed.

[0005]

However, in such a rotary needle a, since the needle a1 does not enter the right angle, the needle a1 is apt to be bent or bent, and the length of the needle a1 is limited. Is difficult to completely penetrate. If the needle body a1 is set thick to prevent breakage or the like, the through-hole H expands in an elliptical shape due to the rotation, so that the appearance quality is deteriorated, such as leaving marks as bears on the outer surface of the tire. Further, since the rotating needle a becomes a resistance of conveyance,
The tire rubber member G is liable to coast or diagonally feed, and is likely to cause the tire rubber member G to be transported and clogged.

Accordingly, the present invention provides a method of intermittently transporting a tire rubber member, and lowering the needle while pressing the tire rubber member between a receiving plate and a holding plate while the transportation is stopped, thereby removing the tire rubber member. While trying to reduce the diameter and length of the needle body based on making it penetrate at a right angle,
An object of the present invention is to provide a transport punching device that can suppress breakage or bending of a needle body, improve penetration accuracy and appearance quality of a through-hole, and prevent occurrence of transport jamming and oblique feeding.

[0007]

In order to achieve the above-mentioned object, the invention of claim 1 of the present application is a transport drilling device for transporting an unvulcanized belt-shaped tire rubber member and forming a through hole for venting air. And a piercing means for intermittently transporting the tire rubber member, the piercing means comprising a receiving plate having a receiving surface for receiving a lower surface of the tire rubber member, and a lifting table held movably up and down. A pressing plate having a pressing surface which comes into contact with the surface of the tire rubber member when the elevator is lowered while the transport means is stopped, and presses the tire rubber member against the receiving plate; A drilling tool provided with a plurality of needles for drilling that also project downward and penetrate the tire rubber member, and a receiving surface of the receiving plate, The pressing surfaces of the fine the pressing plate, is characterized by the formation of the dimple-like plurality of recesses to prevent sticking and tire rubber member.

Further, in the invention of the transport hole punching device according to claim 2, the concave portion has a spherical shape and a radius of 2 to 10 m.
m, the depth of the recess is 1.0 mm or more.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing an embodiment of a transport punching apparatus according to the present invention, and FIG. 2 is a perspective view of a main part thereof.

In FIG. 1, a conveying drilling device 1 includes a conveying means 2 for intermittently conveying a tire rubber member G and a needle body 1 for forming a through hole H for air release in the tire rubber member G.
9, a drilling means 3 having a receiving plate 4 and a drilling tool 5.

As shown in FIG. 10, the tire rubber member G is an unvulcanized and belt-shaped rubber member for forming a green tire such as a carcass, a side wall rubber, a tread rubber, and the like. The case where the device 1 forms the through hole H in the sidewall rubber is illustrated.

In the present embodiment, the conveying means 2 intermittently pulls out the tire rubber member G from the roll body 6 which rewinds the tire rubber member G via a peeling liner and intermittently feeds the tire rubber member G to the piercing means 3. And a carry-out section 2B for carrying out the tire rubber member G from the drilling means 3 intermittently. In this example, the unloading section 2B is a conveyor, and continuously supplies the raw tire to a former (not shown) through a well-known festoon 7, for example. Reference numeral 9 in the figure is a guide roll, and reference numeral 1
0 is a liner winding roll.

Next, in the present embodiment, the piercing means 3 is provided as shown in FIG.
A fixed frame 11 having left and right side frames 11L and 11R, and a lateral movement adjustment frame supported by lateral movement adjusting means 12 attached to the fixed frame 11 and capable of laterally moving in the width direction F of the tire rubber member G. 13 and so on.

The lateral movement adjusting means 12 includes a pair of lateral guide shafts 14 spanned between the side frames 11L and 11R, and is supported by one side frame 11R and parallel to the lateral guide shafts 14. And a handle shaft 15 extending therethrough. The handle shaft 15 has a screw portion 15A screwed to the lateral movement adjusting frame 13 on the inner end side, and a manually operable handle portion 15B on the outer end side.
The lateral movement adjusting frame 13 has a frame shape in which the side plates 16 and 16 are connected by upper, middle and lower support members 17A, 17B and 17C, and guides the lateral guide 14 to each side plate 16. A guide hole through which the handle shaft 15 is screwed is provided in one side plate 16.

Therefore, the lateral movement adjusting frame 13 is
By operating the handle on the handle shaft 15, the handle shaft 15 can be freely moved laterally along the lateral guide shaft 14.

The lateral movement adjusting frame 13 is provided with the receiving plate 4 and the drill 5 having the needle 19.

The receiving plate 4 is a tire rubber member G
In this example, the lower support member 17C is attached to the lateral movement adjustment frame 13 as the lower support member 17C. The receiving plate 4 has a plurality of escape holes 20... For avoiding collision with the needle body 19.

Here, in the present embodiment, the carry-in portion 2A is provided with a guide roll 9A pivotally attached to the lateral movement adjustment frame 13 and having a carry-in surface (outer peripheral surface) having the same height as the receiving surface 4S. Including. The unloading section 2B is pivotally attached to the lateral movement adjusting frame 13 and presses the tire rubber member G against the unloading surface having the same height as the receiving surface 4S.
It is comprised including.

As described above, by attaching the guide roll 9A and the pressing roller 34 integrally to the lateral movement adjusting frame 13, it is possible to replace the tire rubber member G and maintain and inspect the device while maintaining high accuracy. It can be performed efficiently.

In the present embodiment, the drilling tool 5 is provided with a holding plate 23 and a needle body 19 on a lifting table 22 which is held by a lifting means 21 so as to be vertically movable.

The elevating means 21 is provided with the upper support member 1.
A reciprocating moving tool 24 which is, for example, a cylinder, having the lifting platform 22 attached to a rod end supported by 7A and extending downward.
And a pair of vertical guide shafts 25 which stand up from the elevator 22 and extend upward through guide holes of the support member 17B therein. Further, in this example, the reciprocating movement tool 24 is configured by connecting the upper and lower cylinders 24A and 24B in a series, and normally the lowering cylinder 24B lowers the elevating table 22 to the ascending position Y1 (FIG. 3). The through hole H is formed in the tire rubber member G by moving up and down between the position Y2 (FIG. 4). The upper cylinder 24A
Is reduced by, for example, a manual valve operation only in an unusual state such as when the tire rubber member G is replaced, for example, and the elevating table 22 is raised to a further maintenance position (not shown).

In the present embodiment, the holding plate 23 is
3 and 4, it is fixed to the lower end of a slide pin 26 that passes through a guide hole 23A provided in the lift table 22. At the upper end of the slide pin 26, a head 26 for retaining
A is formed.

Therefore, the holding plate 23 can change the distance L between the holding plate 23 and the lifting table 22, that is, the lifting plate 22.
Is supported to be able to move up and down. In addition, between the holding plate 23 and the lift 22,
Is urged downward, for example, a spring means 27 such as a coil spring is provided.

Therefore, when the elevator 22 descends,
A pressing surface 23S which is a lower surface of the holding plate 23.
Once comes into contact with the surface of the tire rubber member G. Then, the distance L decreases as the elevator 22 subsequently descends to the descending position Y2, and the distance L
The pressing plate 23 can press the tire rubber member G against the receiving plate 4 by the force of the spring means 27 accompanying the decrease in the pressure. In this example, the slide pin 26
Is loosely inserted into the guide hole 23A, the pressing plate 23 follows the contour shape of the surface of the tire rubber member G,
It can also be inclined to some extent.

In the present embodiment, the needle body 19 is formed as a single needle unit 29, as shown in FIG. 5, and this needle unit 29 is composed of a plurality of needle bodies 19 arranged in substantially one row.
And a pair of separable block-shaped mounting brackets 30, 30 which hold and sandwich the needles 19 between the inwardly facing surfaces 30S, 30S.

The needle body 19 has a locking bent portion 19B at the upper end of the needle main portion 19A with the needle tip portion 19A1 facing downward.
Are formed in an L-shape. The needle body 19 has a thickness (diameter) of 2.0 to 4.0 in order to reliably exhaust air and to prevent a mark from remaining on the tire surface after vulcanization.
mm.

Each mounting bracket 30 has a holding groove 31 having a semicircular cross section surrounding the needle main portion 19A on each inward surface 30S, and one inward surface 30S.
The needle body 1 by inserting the bent portion 19B.
9 is provided with a locking hole 32 for locking. Each of the mounting brackets 30 is connected to each other by bolts with the inward faces 30S facing each other, and at least one of the mounting brackets 30
The needle unit 29 is fixed to the lower surface of the elevating table 22 by bolting the needle unit 29 to the elevating table 22. Thereby, replacement of the needle body 19 or replacement of the needle unit 29 is facilitated.

An escape hole 33 is formed in the holding plate 23 to avoid collision with the needle body 19. In this example, the escape hole 33 is formed in a rectangular hole shape through which all the needles 19 are inserted, but may be formed in a plurality of small holes corresponding to the needles 19.

Therefore, when the elevating table 22 is lowered, the tire rubber member G is pressed against the receiving plate 4 and held firmly, and then the needle body 19 is further lowered, and the needle tip 1
9A1 projects below the receiving surface 4S and penetrates the tire rubber member G, whereby the through hole H can be formed. Until the needle 19 is securely removed from the tire rubber member G, the tire rubber member G is held between the holding plate 23 and the receiving plate 4, whereby the needle 19 can be pulled out smoothly.

Here, the receiving surface 4 of the receiving plate 4
In addition, it is indispensable that the pressing surface 23S of the pressing plate 23 does not adhere to the tire rubber member G in order for the transport drilling device 1 to operate smoothly and reliably. That is, when the tire rubber member G adheres to the receiving surface 4, it becomes difficult to transport the tire rubber member G. Further, when the tire rubber member G adheres to the pressing surface 23S, the tire rubber member G adheres to the drilling tool 5 and floats once, which causes a displacement or a deformation of the through hole or the tire rubber member G itself.

For this purpose, in this embodiment, as shown in FIGS. 6 to 8, a plurality of dimple-shaped concave portions 36 are formed on the receiving surface 4 and the pressing surface 23S, respectively, over substantially the entire surface. Thereby, the contact area with the tire rubber member G is reduced to about 65 to 85% (about 73% in FIGS. 6 and 7), and the adhesion is prevented.

The recess 36 has a spherical shape, a radius R of 2.0 to 10.0 mm, and a depth h of 1.0 mm.
The above is preferable from the viewpoint of exhibiting the anti-adhesion effect. If the radius R exceeds 10.0 mm, the tire rubber member G easily enters the concave portion 36 to easily deform or damage the tire rubber member G, and the transport resistance increases, making smooth feeding difficult. When the depth h is less than 1.0 mm, the inner surface of the recess 36 may come into contact with the tire rubber member G. When the radius R is less than 2.0 mm, the number of the recesses 36 formed to reduce the contact area may be reduced. In any case, the transport resistance increases, for example, the edge component becomes excessive and the edge component increases.

In this embodiment, in order to further prevent the adhesion to the tire rubber member G, the receiving surface 4 and the pressing surface 23
S has been subjected to a non-adhesive surface treatment such as an adlon treatment or a Teflon coating treatment.

9A to 9C show the operation of the transport hole making apparatus 1. FIG. As shown in FIG. 9A, while the elevator 22, that is, the drilling tool 5 is waiting at the ascending position Y <b> 1, the conveying means 2 intermittently feeds and supplies the tire rubber member G onto the receiving plate 4.

While the transporting means 2 is stopped, FIG.
As shown in (B), the lift 22 is lowered from the raised position Y1 to the lowered position Y2 by the operation of the lower cylinder 24B. At this time, as shown in FIG. 4, in a state where the tire rubber member G is sandwiched and held between the receiving plate 4 and the pressing plate 23, the needle body 19 is lowered to form the through hole H in the tire rubber member G. The holding is maintained until the needle body 19 comes out completely by ascending.

Accordingly, the needle body 19 does not bend or bend, and the needle body 19 can be smoothly penetrated or pulled out, so that a thin and long needle body 19 can be used. As a result, it is possible to reliably penetrate the tire rubber members G having different thicknesses, and furthermore, it is possible to minimize the traces of the through holes H and suppress the deterioration of the appearance quality. Further, since a large number of through holes H, for example, 10 or more can be formed at a time, the formation efficiency is excellent, and the air accumulation can be more effectively prevented for the wide tire rubber member G. In addition, since the piercing is performed while the conveyance is stopped, it is possible to prevent the conveyance from being jammed or the slant feeding.

As shown in FIG. 9 (C), after the through hole H is formed and the elevator 22 returns between the ascending positions Y1, the conveying means 2 operates to intermittently feed the tire rubber member G.
At this time, the tire rubber member G moves while sliding on the receiving plate 4. However, since the receiving surface 4S is provided with the concave portion 36 for preventing adhesion, smooth movement (conveyance) is ensured.

[0038]

EXAMPLE Using the apparatus shown in FIG. 1, a through hole was formed in the side wall rubber, and the occurrence rate of defective products at that time was determined as shown in FIG.
And the occurrence rate of defective products when using the conventional apparatus shown in FIG. Conventional defect rate is 198, 3
In contrast to the ratio of 1.23% with respect to 83 pieces, in the apparatus of the embodiment, it can be confirmed that the occurrence rate of defective products with respect to the number of produced 230 and 454 pieces is significantly reduced to 0.42. Was.

[0039]

As described above, the present invention intermittently conveys the tire rubber member, and presses the needle while pressing the tire rubber member between the receiving plate and the holding plate while the conveyance is stopped. The tire rubber member is lowered and penetrated at right angles. Therefore, while reducing the diameter and length of the needle body, the needle body can be prevented from being bent or bent, and the penetration accuracy and appearance quality of the through-hole can be improved, and the occurrence of jamming and oblique feeding of the conveyance can be prevented. sell. In addition, since the receiving surface and the pressing surface are formed with a concave portion for preventing adhesion to the tire rubber member, the tire rubber member can be transported reliably.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a transport punching device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a drilling means.

FIG. 3 is a cross-sectional view showing the drilling tool at a raised position.

FIG. 4 is a sectional view showing the drilling tool in a lowered position.

FIG. 5 is an exploded perspective view illustrating an attached state of the needle body.

FIG. 6 is a bottom view showing a pressing surface.

FIG. 7 is a bottom view showing a receiving surface.

FIG. 8 is a sectional view showing a concave portion.

FIGS. 9A to 9C are diagrams illustrating the operation of the apparatus.

FIG. 10 is a perspective view showing an example of a tire rubber member.

FIG. 11 is a cross-sectional view illustrating a conventional technique.

[Explanation of symbols]

 2 Conveying Means 3 Drilling Means 4 Receiving Plate 4S Receiving Surface 5 Drilling Tool 19 Needle 19A1 Needle Tip 22 Elevating Stand 23 Holding Plate 23S Pressing Surface 36 Concave G Tire Rubber Member H Through Hole

Claims (2)

[Claims] 1. A transport drilling device for transporting an unvulcanized belt-shaped tire rubber member and forming a through hole for air release, comprising a transport means for intermittently transporting the tire rubber member, and a drilling means. The perforating means includes a receiving plate having a receiving surface for receiving a lower surface of the tire rubber member, and an elevating platform held movably up and down. And a pressing plate having a pressing surface for abutting the tire rubber member against the receiving plate, and a plurality of needle bodies for drilling in which the needle tip protrudes downward from the receiving surface during the lowering and penetrates the tire rubber member. The receiving surface of the receiving plate and the pressing surface of the pressing plate have an adhesive with the tire rubber member. Conveying drilling apparatus characterized by the formation of the dimple-like plurality of recesses for locking. 2. The concave portion has a spherical shape and a radius of 2 to 2.
2. The apparatus according to claim 1, wherein the depth of the recess is 10 mm or more.