KR20220056387A - air chuck for winding machine of semi-finished tire - Google Patents

Abstract

The present invention relates to an air chuck for a winding machine of a semi-finished tire, and more particularly, to an air chuck in which the air chuck is smaller than an inner diameter of a bobbin around which a semi-finished tire is wound so that the bobbin is replaced very rapidly and easily, and when the bobbin is rotated, close adhesion with the bobbin is increased by expansion of an air tube so that a rotational force of a driving shaft is transmitted without a slip. According to the present invention, the air chuck for the winding machine of the semi-finished tire includes: a body part having an outer diameter that is smaller than an inner diameter of a bobbin, having an empty space inside the body part, and having an entrance hole formed in a side surface of the body part; a deformation unit installed inside the body part, and having an outer diameter, which expands when air is injected and is reduced when the air is discharged; and a pressing shoe coupled to the deformation unit, configured to move outward of the body part through the entrance hole to make contact with an inner surface of the bobbin when the outer diameter of the deformation unit expands, and to move inward of the body part so as to be separated from the inner surface of the bobbin when the outer diameter of the deformation unit is reduced.

Description

Air chuck for winding machine of semi-finished tire

The present invention relates to an air chuck for a semi-finished tire winding machine, and more particularly, it is formed smaller than the inner diameter of the bobbin on which the semi-finished tire is wound, so that the bobbin can be replaced very quickly and easily. It relates to an air chuck capable of increasing the adhesion and thus transmitting the rotational force of a drive shaft without slip.

In general, the tread and sidewall, which are semi-finished tire products in the form of sheets manufactured from an extruder, are required to maintain their original extrusion shape until vulcanization. It is transported and put into the next process.

A conventional winding device is disclosed in Korean Patent Laid-Open No. 10-2003-0029738.

The winding device disclosed above includes: a conveyer belt and a conveying unit configured of a pair of drums for moving the conveyor belt and conveying an inner, which is a semi-finished tire; a detection unit configured as a sensor to detect the conveying speed of the inner conveyed by the conveying unit; a liner supply unit comprising a liner supply device on which a predetermined amount of liner is wound, and a pulley for guiding the inner and the liner; It is composed of a winder and a motor and includes a rotary drive unit for winding the inner and liner, and a control unit configured with a manually operated controller to control the rotation speed of the rotary drive unit.

The above-described conventional winding device winds the semi-finished tire on the outside of the bobbin while the bobbin is rotated by the driving of the motor. In this case, the bobbin is rotated by inserting the winding shaft receiving the rotational force from the motor inside the bobbin. In general, when the diameter of the winding shaft is formed small, the operation of inserting or withdrawing into the bobbin is easy and fast. In addition, if the diameter of the winding shaft is increased to fit the inner diameter of the bobbin, the slip problem can be solved, but there is a problem in that the operation of inserting or withdrawing into the bobbin becomes difficult.

Korean Patent Laid-Open No. 10-2003-0029738: Winding device for semi-finished tires

The present invention was created to improve the above problems, and since the tire semi-finished product is formed smaller than the inner diameter of the bobbin on which it is wound, the bobbin replacement is very fast and easy. An object of the present invention is to provide an air chuck capable of transmitting the rotational force of a drive shaft without slip.

The air chuck for a semi-finished tire winding machine of the present invention for achieving the above object is an air chuck for a winding machine that is inserted into a bobbin on which a semi-finished tire product is wound and can be combined with and separated from the inner surface of the bobbin, wherein the bobbin a body portion formed with an outer diameter smaller than the inner diameter of the body portion having an empty interior and an entrance hole formed on the side thereof; a deforming unit installed inside the body part, the outer diameter of which is expanded when air is injected and the outer diameter is reduced when air is discharged; Coupled to the deformation unit, when the outer diameter of the deformation unit is expanded, the body portion moves outwardly through the entrance hole to come into contact with the inner surface of the bobbin, and when the outer diameter of the deformation unit is reduced, the body portion moves inwardly. and a pressing shoe separated from the inner surface of the bobbin.

The deformation unit includes an inner pipe having a first vent on the side thereof, an outer pipe having the inner pipe installed therein and having a second vent on the side thereof, and a first coupling module coupled to the front side of the outer pipe; A second coupling module coupled to the rear side of the outer pipe, is formed to surround the outer pipe, can be expanded and contracted by air, one side is detachably coupled to the first coupling module, and the other side is the second coupling It has an air tube detachably coupled to the module and replaceable.

The first coupling module is coupled to one end of the outer pipe and includes a rim through which the inner pipe passes, and detachably coupled to the rim so that one side of the air tube is in close contact with the rim and the inner pipe is inserted. a rim flange having an insertion hole formed therein; a fixing bolt inserted into the insertion hole to be screwed with the inner pipe; wherein the second coupling module is coupled to the other end of the outer pipe and a plug through which the inner pipe passes; It is coupled to the other end of the inner pipe so as to be detachably attached to the other end of the air tube in close contact with the plug, an air inlet communicating with the flow path of the inner pipe is formed, and a plug flange fixed to the body portion.

The pressure shoe includes a plate coupled to the outside of the air tube and arranged at regular intervals, and a protruding pad coupled to the plate to protrude outward of the air tube and inserted into the entry/exit hole.

It further includes; a return promoting means installed inside the body portion to promote the return of the pressure shoe by pushing the pressure shoe inward of the body portion when air is discharged from the deformation unit.

As described above, the present invention can be combined with and separated from the bobbin by expanding and contracting using an air tube. Therefore, since the outer diameter of the body portion can be formed smaller than the inner diameter of the bobbin on which the semi-finished tire is wound, it is very easy and quick to insert into the bobbin or take it out from the bobbin.

In addition, in the present invention, when the bobbin is to be rotated, the rotational force of the drive shaft can be transmitted to the bobbin without slip by injecting air to inflate the air tube to attach the pressure shoe to the bobbin.

In addition, since the present invention is a form in which a plurality of components are assembled and combined, each component can be replaced, and in particular, the air tube can be easily replaced.

1 is a perspective view of an air chuck according to an embodiment of the present invention;
Figure 2 is a cross-sectional view of the air chuck shown in Figure 1,
3 is a longitudinal cross-sectional view of the air chuck shown in FIG. 1;
Figure 4 is an exploded perspective view of the deformation unit applied to Figure 1,
Figure 5 is a perspective view showing the state of the pressing shoe applied to Figure 1,
6 is a cross-sectional view showing a state in which the deformation unit and the pressure shoe applied in FIG. 1 are combined;
7 is a cross-sectional view of the air chuck showing the operating state of FIG.

Hereinafter, an air chuck for a semi-finished tire winding machine according to a preferred embodiment of the present invention will be described in detail.

The air chuck for a semi-finished tire winding machine of the present invention is inserted into the bobbin on which the semi-finished tire is wound, so that it can be combined with and separated from the inner surface of the bobbin.

1 to 6 , the air chuck for a semi-finished tire winding machine according to an embodiment of the present invention is formed with an outer diameter smaller than the inner diameter of the bobbin 1, has an empty interior, and has a body part ( 10), and a deformable unit 30 installed inside the body 10 and having an outer diameter expanded when air is injected and a reduced outer diameter when air is discharged, and a pressure shoe 70 coupled to the deforming unit 30 to provide

The body portion 10 includes a housing 11 with an empty interior, a first cap 20 coupled to the front side of the housing 11, and a flange 29 coupled to the rear side of the housing 11. A second cap (25) is provided.

The housing 11 is formed in a cylindrical structure in which both front and rear sides are open. The outer diameter of the housing 11 is formed smaller than the inner diameter of the bobbin (1). Accordingly, the housing 11 can be easily inserted into and withdrawn from the bobbin 1 .

An entrance hole 13 is formed in the side surface of the housing 11 . The entrance and exit holes 13 are formed to be long in the front and rear. A plurality of access holes 13 are formed at regular intervals along the outer periphery of the housing 11 . In the illustrated example, the entrance holes 13 are formed one by one at intervals of 90 degrees. Two entrance and exit holes 13 of each row are spaced back and forth and are formed in a line.

A protruding pad 73 of a pressure shoe 70 to be described later is inserted into the entry/exit hole 13 . Accordingly, the access hole 13 and the protruding pad 73 are formed at positions corresponding to each other.

The first cap 20 is coupled to the front side of the housing 11 and serves to block the front side of the housing 11 .

The second cap 25 is coupled to the rear side of the housing 11 to block the rear surface of the housing 11 . A plug flange 65 to be described later is coupled to the inside of the second cap 25 . The second cap 25 is provided with an air supply hole 26 connected to the air inlet 67 of the plug flange 65 . Air supplied from the outside is introduced into the air inlet 67 through the air supply hole 26 to expand the air tube 45 to be described later. And when it is desired to discharge air from the air tube 45 to the outside, the air is discharged to the outside through the air inlet 67 and the air supply hole 26 .

A flange 29 is formed on the rear surface of the second cap 25 . The flange (29) engages with the flange (5) of the winding machine drive shaft (3). Accordingly, the body portion 10 can be rotated by the rotation of the drive shaft 3 . The drive shaft 3 is made of a hollow structure with an empty interior, and air can be supplied to the air chuck through the drive shaft 3 .

The deformation unit 30 is installed inside the body portion 10 . The deformation unit 30 serves to move the pressure shoe 70 while the outer diameter is expanded when air is injected and the outer diameter is reduced when the air is discharged.

The illustrated deformation unit 30 has an inner pipe 31 having a first ventilation hole 33 formed on the side thereof, and an outer pipe 41 having an inner pipe 31 installed therein and a second ventilation hole 43 formed on the side surface. A first coupling module coupled to the front side of the outer pipe 41, a second coupling module coupled to the rear side of the outer pipe 41, and the outer pipe 41 are formed to surround the first side It is coupled to the coupling module and the other side is coupled to the second coupling module, and an air tube 45 that can be expanded and contracted by air is provided.

The inner pipe 31 is formed to be long in front and back. The inner pipe 31 has a flow path 32 formed therein. The front side of the flow path 32 is closed, and the rear side of the flow path 32 is open. A screw hole 35 is formed on the front side of the inner pipe 31 where the flow path 32 is blocked. And a screw thread 37 is formed on the outer peripheral surface of the rear side of the inner pipe 31 in which the flow path 32 is opened.

A first ventilation hole 33 is formed in the inner pipe 31 . The first ventilation holes 33 are provided on the upper side and the lower side of the inner pipe 31, respectively. The air introduced into the flow path 32 of the inner pipe 31 is discharged to the outside of the inner pipe 31 through the first ventilation hole 33 .

The outer pipe 41 is formed to be long in front and back. The outer pipe 41 has a shorter length than the inner pipe 31 . The outer pipe 41 has a hollow structure with an empty interior. The front and rear surfaces of the outer pipe 41 are open.

The inner pipe 31 is installed inside the outer pipe 41 . The inner pipe 31 and the outer pipe 41 are arranged concentrically. Since the inner pipe 31 is formed longer than the outer pipe 41 , the front and rear surfaces of the inner pipe 31 are exposed to the outside of the outer pipe 41 .

The inner diameter of the outer pipe 41 is larger than the inner diameter of the inner pipe 31 . Accordingly, the inner peripheral surface of the outer pipe 41 and the outer peripheral surface of the inner pipe 31 are spaced apart.

A second ventilation hole 43 is formed in the outer pipe 41 . The second ventilation holes 43 are provided on the upper side and the lower side of the outer pipe 41, respectively, one by one. The second vent (43) is formed at a position corresponding to the first vent (33). The air introduced into the flow path 32 of the inner pipe 31 is discharged through the first ventilation hole 33 and flows into the outer pipe 41, and the air introduced into the outer pipe 41 is the second It is discharged to the outside of the outer pipe (41) through the vent (43).

The first coupling module is coupled to the front side of the outer pipe (41).

The first coupling module is coupled to one end of the outer pipe 41 and is coupled to the rim 51 through which the inner pipe 31 penetrates, and detachably coupled to the rim 51 to rim one side of the air tube 45. A rim flange 55 in which an insertion hole 56 is formed in close contact with the inner pipe 31 and into which the inner pipe 31 is inserted, and a fixing bolt 59 which is inserted into the insertion hole 56 and screwed with the inner pipe 31 to provide

The rim 51 is coupled to the front end of the outer pipe 41 . The front part of the rim 51 is coupled to the rim flange 55 , and the rear part is inserted into the outer pipe 41 . The rim 51 is provided with a through-hole 53 formed through the front and rear. The inner pipe 31 passes through the through hole 53 of the rim 51 .

The rim flange 55 is coupled to the front surface of the rim 51 to be detachably attached. The rim flange 55 is provided with an insertion hole 56 formed through the front and rear. The inner pipe 31 passing through the through hole 53 of the rim 51 is inserted into the insertion hole 56 of the rim flange 55 . A fixing bolt 59 is fastened to the screw hole 35 of the inner pipe 31 inserted into the insertion hole 56 of the rim flange 55 .

The fixing bolt 59 is coupled to the screw hole 35 through the insertion hole 56 of the rim flange 55 . When the fixing bolt 59 is tightened, the rim flange 55 is coupled to the rim 51 while moving in the rear direction.

The second coupling module is coupled to the rear side of the outer pipe 41 .

The second coupling module is coupled to the other end of the outer pipe 41 and is coupled to the plug 61 through which the inner pipe 31 passes, and is detachably coupled to the other end of the inner pipe 31 to enable the air tube (45). An air inlet 67 communicating with the flow path 32 of the inner pipe 31 is formed in close contact with the other side of the plug 61 , and a plug flange 65 fixed to the body portion 10 is provided.

The plug 61 is coupled to the rear end of the outer pipe 41 . The front portion of the plug 61 is inserted into the outer pipe 41 . The plug 61 is provided with a through hole 63 formed through the front and rear. The inner pipe 31 passes through the through hole 63 of the plug 61 .

The plug flange 65 is screwed to the rear end of the inner pipe 31 to be detachable. A screw hole 69 is formed in the front part of the plug flange 65 for screwing with the inner pipe 31 . And the screw hole 69 is connected to the air inlet (67). A protrusion 66 is formed on the rear surface of the plug flange 67 . The protrusion 66 is fitted and coupled to the coupling hole 27 formed inside the second cap 25 of the body 10 . An O-ring 68 is mounted on the outer circumferential surface of the protrusion 66 to maintain airtightness between the protrusion 66 and the coupling hole 27 .

The air tube 45 is formed to surround the outer pipe 41 . The air tube 45 is made of an elastic material. For example, the air tube 45 may be formed of rubber. This air tube 45 repeats expansion and contraction by the injection and discharge of air. When air is injected into the air tube 45 , the air tube 45 expands and increases in diameter, and when air is discharged from the air tube 45 , the air tube 45 contracts and decreases in diameter.

The air tube 45 has an empty inside and an inlet 47 is formed on the front side. And a rear hole through which the inner pipe 31 can pass is formed on the rear surface of the air tube.

After inserting the inner pipe (31), outer pipe (41), rim (51), and plug (61) into the inside of the air tube (45) through the inlet of the air tube (45) in a combined state, the inner pipe (31) ) through the rear end of the air tube (45) through the rear hole. In this state, after the rim flange 55 is coupled to the rim 51 , the fixing bolt 59 is tightened to press the rim flange 55 in the rim 51 direction. At this time, the edge of the inlet 47 of the air tube 45 is located between the rim 51 and the rim flange (55). When the fixing bolt 59 is tightened, the inlet edge of the air tube 45 is compressed between the rim 51 and the rim flange 55 while the rim flange 55 moves. Accordingly, the inlet of the air tube 45 is sealed.

Then, the plug flange 65 is screwed to the rear end of the inner pipe 31 in the rear direction of the air tube 45 . When the plug flange 65 is rotated, the plug flange 65 moves in the front direction to bring the rear surface of the air tube 45 into close contact with the plug 61 . Accordingly, the rear surface of the air tube 45 is compressed between the plug flange 65 and the plug 61, and the rear hole of the air tube 45 is sealed.

As such, the front surface of the air tube 45 is fixed to the first coupling module, and the rear surface is fixed to the second coupling module. Therefore, when air is injected through the air inlet 67 of the plug flange 65, the air passes through the first vent hole 33 of the inner pipe 31 and the second vent hole 43 of the outer pipe 41, It flows into the inside of the air tube 45 and the side surface of the air tube 45 expands.

In addition, since one side of the air tube 45 is detachably coupled to the first coupling module and the other side is detachably coupled to the second coupling module, the air tube 45 can be replaced. That is, when the fixing bolt 59 is loosened to separate the rim flange 55 from the rim 51, and the plug flange 65 is rotated to separate the plug flange 65 from the inner pipe 31, the air tube 45 can be replaced

The pressure shoe 70 is coupled to the outside of the air tube 45 .

The pressure shoe 70 is coupled to the outer surface of the air tube 45 and a plurality of plates 71 arranged at regular intervals, coupled to the plate 71 and formed to protrude outward of the air tube 45, A protruding pad 73 inserted into the entry/exit hole 13 is provided.

The plate 71 is formed to be elongated forward and backward. A plurality of plates 71 are installed at regular intervals on the outer surface of the air tube 45 . In the illustrated example, the plates 71 are installed at intervals of 90 degrees. A plurality of bolt insertion holes into which the bolts 75 are inserted are formed in the plate 71 .

The protrusion pad 73 is formed to protrude from the plate 71 and is inserted into the entry/exit hole 13 of the housing 11 . Two protrusion pads 73 are formed to be spaced apart from each other in the front-rear direction on each plate 71 . A screw hole is formed in the lower portion of the protruding pad 73 . The bolt 75 inserted through the bolt insertion hole is screwed into the screw hole of the protruding pad 73 .

When air is introduced into the air tube 45 , as shown in FIG. 7 , the outer diameter of the air tube 45 is expanded and the pressure shoe 70 is pushed outward of the air tube 45 . Accordingly, the protruding pad 73 moves to the outside of the housing 11 through the entry hole 13 and comes into contact with the inner surface of the bobbin 1 while protruding. And when the air is discharged in this state, the outer diameter of the air tube 45 is reduced while the air tube returns to its original shape, and accordingly, the pressure shoe 70 moves in the inner direction of the housing 11 and the protruding pad 73 . The end of the bobbin (1) is separated from the inner surface.

As such, the present invention can be coupled and separated from the bobbin 1 by expanding and contracting the air tube 45 . Therefore, since the outer diameter of the housing 11 can be formed smaller than the inner diameter of the bobbin 1 on which the semi-finished tire is wound, it is very easy and quick to insert into the bobbin 1 or take it out from the bobbin 1 . And when the bobbin 1 is to be rotated, the rotational force of the drive shaft can be transmitted to the bobbin without slipping by injecting air to expand the air tube 45 to bring the pressure shoe 70 into close contact with the bobbin 1 .

In addition, since the present invention is a form in which a plurality of components are assembled and combined, each component can be replaced. In particular, the present invention has the advantage that the air tube 45 can be easily replaced by disassembling the rim flange 55 of the first coupling module and the plug flange 65 of the second coupling module.

On the other hand, in the present invention, when the air is discharged from the air tube 45, the air tube 45 is rapidly contracted and a return promoting means for facilitating the return of the pressure shoe 70 may be further provided.

A spring 80 installed on the pressure shoe 70 may be applied as a means for promoting a return. The plate 71 of the pressing shoe 70 is provided with a seating groove 72 for the lower portion of the spring 80 to be seated. The upper portion of the spring 80 seated in the seating groove 72 is in contact with the inner surface of the housing 11 . Two or more springs 80 may be installed at regular intervals on one plate 71 .

When air is introduced into the air tube 45 , the outer diameter is expanded and the pressure shoe 70 is pushed outward of the air tube 45 . Accordingly, the protruding pad 73 moves to the outside of the housing 11 through the entry hole 13 and comes into contact with the inner surface of the bobbin 1 while protruding. Along with this, the spring 80 seated on the plate 71 is also compressed while moving outward. And when air starts to be discharged from the air tube 45 , the elastic force of the spring 80 pushes the plate 71 inward of the housing 11 , so the air tube 45 is rapidly contracted. Accordingly, the return of the pressing shoe 70 is promoted, so that the protruding pad 73 can also be quickly separated from the inner surface of the bobbin 1 .

As mentioned above, although the present invention has been described with reference to one embodiment, it will be understood that this is merely an example, and that those skilled in the art may make various modifications and equivalent embodiments therefrom. Accordingly, the true protection scope of the present invention should be defined only by the appended claims.

1: bobbin 10: body part
11: housing 20: first cap
25: second cap 30: deformation unit
31: inner pipe 41: outer pipe
45: air tube 70: pressure shoe
71: plate 73: protruding pad
80: spring

Claims (5)

An air chuck for a winding machine that is inserted into a bobbin on which a semi-finished tire product is wound and can be combined with and separated from an inner surface of the bobbin, the air chuck comprising:
a body portion formed with an outer diameter smaller than the inner diameter of the bobbin, the interior is empty, and an entrance hole is formed on a side thereof;
a deforming unit installed inside the body part, the outer diameter of which is expanded when air is injected and the outer diameter is reduced when air is discharged;
It is coupled to the deformation unit, and moves outwardly of the body portion through the access hole when the outer diameter of the deformation unit is expanded to come into contact with the inner surface of the bobbin and move in the inner direction of the body portion when the outer diameter of the deformation unit is reduced. Air chuck for a semi-finished tire winding machine, characterized in that it comprises a pressure shoe separated from the inner surface of the bobbin. According to claim 1, wherein the deformation unit has a first vent formed on a side inner pipe, the inner pipe is installed inside the outer pipe is formed with a second vent hole on the side, and a first coupled to the front side of the outer pipe A first coupling module, a second coupling module coupled to the rear side of the outer pipe, is formed to surround the outer pipe and can be expanded and contracted by air, and one side is detachably coupled to the first coupling module The air chuck for a semi-finished tire winding machine, characterized in that the other side is detachably coupled to the second coupling module and includes a replaceable air tube. The method according to claim 2, wherein the first coupling module is coupled to one end of the outer pipe and includes a rim through which the inner pipe passes, and detachably coupled to the rim to bring one side of the air tube into close contact with the rim. A rim flange having an insertion hole into which the inner pipe is inserted, and a fixing bolt inserted into the insertion hole and screwed into the inner pipe,
The second coupling module is coupled to the other end of the outer pipe and is coupled to a plug through which the inner pipe passes, and detachably coupled to the other end of the inner pipe to bring the other end of the air tube into close contact with the plug and the inner pipe. An air chuck for a semi-finished tire winding machine, comprising an air inlet communicating with the flow path of the pipe and having a plug flange fixed to the body portion. According to claim 2, wherein the pressure shoe is coupled to the outside of the air tube and a plurality of plates arranged at regular intervals, coupled to the plate is formed to protrude outward of the air tube is inserted into the entrance hole Air chuck for a semi-finished tire winding machine, characterized in that it has a protruding pad. [2] The method of claim 1, further comprising: a return promoting means installed inside the body portion to push the pressure shoe inward of the body portion when air is discharged from the deformation unit to promote the return of the pressure shoe. An air chuck for a semi-finished tire winding machine.

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