JPH0575657B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a butt joint device for rubber sheets used for bottom rubber of low edge belts, etc.

(Prior art) Conventionally, the rubber sheet (e.g. 0.6 mm) that serves as the bottom rubber of a low edge belt is produced using a hand roller.
The lap joint is done by hand.

(Problem to be Solved by the Invention) Therefore, while forming a belt, the wrap joint portions of the canvas or the bottom rubber sheet may overlap, resulting in that portion becoming thicker than necessary, resulting in poor thickness.

In particular, the rubber sheet forming the bottom rubber has a thickness of, for example, 0.8 mm, and as the thickness of the bottom rubber increases, more rubber sheets must be laminated, the joint part increases, and such thickness increases. Defects become a big problem because when the belt is bent, stress concentrates in that part, causing peeling and cracking.

The present invention has been made in view of this problem, and provides a rubber sheet butt joint device that does not increase the thickness of the joint portion.

(Means for Solving the Problems) In order to achieve the above object, the present invention is a butt joint device for rubber sheets used for the bottom rubber of a row edge belt, etc. The first and second unvulcanized rubber sheets hanging vertically by the cutter are overlapped and cut in the horizontal direction. A cutting means, a gripping part that grips the cut remaining portions of the first and second unvulcanized rubber sheets cut by the cutting means by the operation of a gripping cylinder, and a tension cylinder that pulls the gripping part downward. a cut residue removal means which grips the cut residue adhering to the blade receiving plate in the grip part and pulls it off by the operation of a tension cylinder; and a winding means for bringing the cut end surfaces of both rubber sheets into a butt state.

(Operation) When the ends of the pair of stacked unvulcanized rubber sheets are cut by the cutting means, the cut remaining portions of the unvulcanized rubber sheets are removed by the remainder removing means. Then, when the unvulcanized rubber sheet whose ends have been cut is wound up by the winding means, only one side edge of the cut end face is joined.
The entire cut end surfaces of both the rubber sheets come into contact with each other, and are joined due to the adhesiveness of the unvulcanized rubber.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

In FIGS. 1 and 2 showing the overall configuration of a butt joint device for rubber sheets used for the bottom rubber of a row edge belt, etc., 1 and 2 are first and second unvulcanized rubber sheets (for example, 0.8 mm)
The short fibers are arranged in the width direction, and the first unvulcanized rubber sheet 1 is supplied from a supply roller (not shown), while the second unvulcanized rubber sheet 2 is supplied as a winding means. It is adapted to be wound up on a winding roller 3.

The first unvulcanized rubber sheet 1 has a leading edge 1a
hangs down from the roller 5 part,
The rear edge 2a of the second unvulcanized rubber sheet 2 hangs down from the other roller 6.

On the side of the first unvulcanized rubber sheet 1, an air cylinder 10 is disposed approximately at the center in the width direction, and a piston rod 11 of the air cylinder 10 has a length approximately equal to the length of the rubber sheet at the tip end. Sano Katsuta 1
2 is attached so that the cutter 12 can move forward and backward in the horizontal direction. A guide rod 13 is attached to the side of the cutter 12, and is slidably inserted into a guide member 15 fixed to the frame 14.

On the other hand, on the winding side frame 16, a blade receiver 17 is disposed via a mounting member 18, facing the cutter 12.

In this way, the cutter 12 and the blade receiver 17 constitute a cutting means.

On the lower side of the blade receiver 17, there is provided a means for removing the cut remaining parts of the first and second unvulcanized rubber sheets 1 and 2 adhering to the cut rear knife receiver 17 by pulling them downward. , a gripping mechanism 21 is provided.

As shown in detail in FIG. 3 and FIG.
2a is pivotally supported;
The second arm 23 has a substantially arch-shaped second arm 23 whose base end 23a is rotatably supported about another rotation axis 28 perpendicular to the second rotation axis 27.

A gripping cylinder 24 is interposed between the first and second arms 22 and 23 and near both base ends 22a and 23a, and the gripping cylinder 24
Open and close both arms 22 and 23 at
The cut remaining portions A of the rubber sheets 1 and 2 are gripped by the gripping portions 22b and 23b at the tips of the rubber sheets 2 and 23.

Further, a tension cylinder 26 is interposed between the floor surface 25 and a portion of the first arm 22 further toward the tip side than the connecting portion with the gripping cylinder 24,
The first arm 22 can be rotated downward together with the second arm 23.

Note that the gripping cylinder 24 has both arms 22 and 23.
In contrast, the tension cylinder 26 is connected to the second arm 23
and are rotatably connected to the floor surface 25, respectively.

Therefore, when the rubber sheets 1 and 2 are butted and jointed, the rubber sheet 1 is moved by a predetermined amount and hangs down from the roller 5 by a predetermined length. On the other hand, the rubber sheet 2 is also allowed to hang down from the roller 6 by a predetermined length.

Then, the air cylinder 10 is operated to cut the end edges of both the rubber sheets 1 and 2 with the cutter 12 (see FIG. 5).

During this cutting, the cut remaining portions A of the rubber sheets 1 and 2 adhere to the blade receiver 17, so the first and second arms 22 of the gripping mechanism 21,
The remaining cut portion A is gripped by the gripping portions 22a and 23a of 23 by the operation of the gripping cylinder 24, and then pulled off from the blade receiver 16 by the operation of the tension cylinder 26.

Thereafter, the cutter 12 is moved backward by the operation of the air cylinder 10, and the rubber sheet is wound around the winding roller 3.

During this winding, only one side edge of the cut surfaces 1b and 2b (the inner lower edge where the rubber sheets 1 and 2 are in contact with each other) is adhesively bonded by the cut (see Fig. 6). , both the above rubber sheets 1,
The two cut surfaces 1b, 2b are brought into an abutting state in which they are in full contact (see FIG. 7), and a butt joint is formed due to the adhesiveness of the unvulcanized rubber.

(Effects of the Invention) As described above, the present invention utilizes the adhesiveness of unvulcanized rubber to perform butt joints, so it is possible to easily butt joint comb sheets with a simple structure. When the bottom rubber sheet of a low edge belt is formed using this method, thickness defects will not occur.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a front view of a rubber sheet butt joint device, FIG. 2 is a plan view thereof, and FIGS. 3 and 4 are a plan view and a side view of a gripping mechanism, FIGS. 5 to 7 are explanatory diagrams of the jointing process of the rubber sheet. 1, 2...Rubber sheet, 1b, 2b...Cut surface, 3...Take-up roller, 10...Air cylinder,
12... Katsu, 17... Blade receiver, 21... Gripping mechanism, 22b, 23b... Gripping portion, 24... Gripping cylinder, 26... Tension cylinder, A...
The rest of the cutlet.

Claims (1)

[Scope of Claims] 1. A butt joint device for rubber sheets used for the bottom rubber of a row edge belt, etc., comprising a cutter that advances and retreats in the horizontal direction and a blade receiver disposed opposite to the cutter. , the first and second parts hanging down in the vertical direction by the cutter.
a cutting means for superimposing unvulcanized rubber sheets and cutting them in a horizontal direction; and an actuation of a gripping cylinder to hold the cut remaining portions of the first and second unvulcanized rubber sheets cut by the cutting means. a gripping part for gripping the cut and a tensioning cylinder for pulling the gripping part downward; a remainder removal means for gripping the remaining part of the cut adhering to the blade receiver with the gripping part and pulling it off by the operation of the tensioning cylinder; A rubber sheet butt joint device comprising a winding means for winding up at least one of first and second unvulcanized rubber sheets and bringing the cut end faces of both rubber sheets into abutting state.