JP2009196113A - Connection device and connection method for drum - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To carry out efficiently connection work of a driving shaft to a shaft of a drum by a single operation, and to enhance work efficiency of drum replacement action. <P>SOLUTION: In this connection device, the center shaft 1 has a flange 3 in its one end, the driving shaft 2 has a piston 5 provided in an outer circumferential part and slidably along an axial direction, a flange 9 formed in an outer circumference of the piston, a locking frame 10 provided in an outer circumference of the flange 9 and for connecting the flange 9 to the flange 3, and a belleville spring 15 for energizing the piston 5 laterally to slide it, the flange 3 is stored into the locking frame 10 as shown in Fig., under the condition where the piston 5 is moved to a left side with air pressure by an air supply means (not shown in Fig.), the locking frame 10 is locked to the flange 3, the piston 5 is slid to a right side by an energizing force of the belleville spring 15, a tip part of a small-diameter part 2b of the driving shaft 2 is joined (pressure-contact) to an abutting face 1c of a large-diameter part 1b of the center shaft 1, and the center shaft 1 is connected firmly to the driving shaft 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an apparatus and method for connecting a central axis of a tire molding drum and a drive shaft of a tire molding machine body, and in particular, the tire molding drum can be easily attached and detached, and a sufficient coupling force can be ensured when the tire molding drum is mounted. The present invention relates to a drum connecting device and a connecting method.

Conventionally, in a tire molding apparatus, a tire molding drum corresponding to the size of a tire to be molded is mounted on a tire molding machine to mold tires of different sizes.
FIG. 6 is a schematic side view of a conventional tire molding apparatus.
The tire molding apparatus includes a molding machine main body 93 having a driving mechanism such as a motor therein, a drive shaft 94 that is rotatable and cantilevered in the horizontal direction on the molding machine main body 93, and one end of the drive shaft 94. And a tire molding drum 91 attached to the rotation shaft 92.

The rotary shaft 92 and the drive shaft 94 have a flange at one end abutting for connection, and when the rotary shaft 92 and the drive shaft 94 are connected, the rotary shaft 92 and the drive shaft 94 are formed on the flange surface in a state of abutting the flange. Bolts are inserted into the holes, and tightened with nuts to fix the rotating shaft 92 and the drive shaft 94 to be connected.
When exchanging the tire molding drum 91 with a different size with this tire molding apparatus, the fixing of the driving shaft 94 and the rotating shaft 92 with the bolts and nuts is released, the rotating shaft 92 is removed, and another tire molding drum 91 is removed. Similarly, an operation of attaching the rotary shaft 92 provided with the drive shaft 94 with bolts and nuts is performed.

However, in the connection and connection release (separation) method in which the flange surface is fixed or unfixed with a nut, there is a work for tightening the nut. There is a problem that the rate decreases.
In addition, this nut tightening work may be unavoidably carried out in a poor scaffolding, which is not preferable from the viewpoint of safety, but this work has to be relied on manually and is difficult to automate. There is.

On the other hand, there is also known a tire molding drum coupling device and method for coupling a drive shaft and a rotary shaft without using bolts and nuts as much as possible (see Patent Document 1).
FIG. 7 is an axial cross-sectional view showing the coupling device in an enlarged manner, and FIG. 8 is a cross-sectional view seen from the arrow II-II shown in FIG.

This connecting device comprises a central shaft 101 of a tire molding drum (not shown) and a driving shaft 102 on the molding machine main body (not shown) for connecting with this.
The center shaft 101 of the tire molding drum is formed with flanges 108 formed at predetermined intervals along the outer periphery on the rear end side (molding machine main body side) (see FIG. 8).
One end of the drive shaft 102 on the molding machine main body is rotatably supported by a molding machine main body (not shown), and a large-diameter portion 107 is integrally connected to the distal end side (tire molding drum side).

The large-diameter portion 107 is an annular member having a predetermined thickness, and a screw 105 is formed along the outer peripheral surface thereof, and the cylindrical member 104 is screwed to the screw 105.
The cylindrical member 104 has a cam roller 106 that is rotatable about the central axis in the radial direction on the side opposite to the side screwed with the large-diameter portion 107, that is, on the tip side (tire molding drum side). A plurality (four in the figure) are attached on the circumference (see FIG. 8).

In this connecting device, when connecting the central shaft 101 and the drive shaft 102, first, the cylindrical member 104 is rotated, and the cam roller 106 is displaced to the position indicated by the broken line, that is, the inactive position of the cam roller 106. In this state, as shown in FIG. 7, the flange 108 of the center shaft 101 is inserted into the cylindrical member 104 from between the displaced cam rollers 106.
Next, by rotating the cylindrical member 104, each cam roller 106 rides on the flange 108, and the flange 108 is pressed toward the drive shaft 102, thereby connecting both shafts 101 and 102.

9 is a cross-sectional view in the axial direction of another connecting device described in Patent Document 1, and FIG. 10 is a cross-sectional view taken along the line IV-IV shown in FIG.
The central shaft 121 has an annular flange 123 attached to the rear end side (molding machine main body side). Further, the drive shaft 122 is provided with an annular flange 124 connected to the flange 123 of the central shaft on the front end side (tire molding drum side).

  The flanges 123 and 124 have arcuate members 128 and 129 having substantially U-shaped cross-sections in which one end portions having a substantially semicircular shape are hinged to each other as shown in FIG. The bolt 130 and the nut 131 pivotably attached to each other and a hinged clamp 134 including a clevis member 132 formed at the other end of the arcuate member 129 are connected.

  That is, the end portion on which the bolt 130 is pivotally attached and the end portion on which the clevis member 132 is formed are closed, and the nut 131 is tightened, so that the groove 135 formed in the arc-shaped members 128 and 129 is inserted into the flange 123. , 124 are fitted to each other, and the central shaft 121 and the drive shaft 122 are connected.

According to the connecting device described in Patent Document 1 described above, the use of bolts and nuts can be reduced, work safety can be improved, and human labor can be reduced.
However, since the coupling device shown in FIGS. 7 and 8 uses the cam roller 106 and the screw 105 for the coupling, the cam roller 106 is worn or galling as the driving shaft 102 and the central shaft 101 are repeatedly coupled and separated. Also, wear and loosening of the screw 105 may occur, and the coupling force may be reduced.
Further, the coupling device shown in FIGS. 9 and 10 has to be manually tightened with nuts to fix the clamp 134, and there is still room for improvement in terms of workability.
JP 2004-358726 A

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to automatically and efficiently connect the drive shaft and the drum shaft and to improve the workability of the drum exchange operation. is there.

The present invention relates to a drum connecting device for connecting a drum shaft and a drum drive shaft, wherein the drum shaft and the drum drive shaft are slidably provided at a connecting portion at the opposite end and the one connecting portion, respectively. A sliding member, a locking means for locking the sliding member to the other connecting portion, a resilient member for sliding the sliding member in one direction with a biasing force, and a biasing force of the resilient member. Pressing means that presses the sliding member in the reverse direction, and the elastic member slides the sliding member in one direction with its urging force to join the connecting ends of the connecting portions, and The pressing means is characterized in that the sliding member is slid in the opposite direction against the urging force of the elastic member to release the connection between the connecting ends.
The invention of the present application is also a drum connection method for connecting a drum shaft and a drum drive shaft, wherein the slide shaft is slidably provided at one connection end of the drum shaft and the drum drive shaft. A step of locking the moving member to the other connecting end, a step of sliding the sliding member with an urging force of a resilient member, and joining the other connecting end to the one connecting end, and the sliding member And applying a fluid pressure to slide the sliding member against the biasing force to release the connection end.

  According to the present invention, the connecting operation of the drive shaft and the drum shaft can be automatically performed, and a sufficient connecting force can be ensured. Therefore, the workability of the drum replacement work can be improved.

  Hereinafter, an embodiment of a drum coupling device of the present invention will be described with reference to the accompanying drawings, taking as an example the coupling of a tire molding drum in a tire molding device and a drive shaft of the tire molding device.

FIG. 1 is a side sectional view of a tire molding drum coupling device according to this embodiment, and FIG. 2 is a cross-sectional view of the tire molding drum coupling device as viewed from the direction of arrows II shown in FIG.
The tire molding drum coupling device is configured in a coupling portion in the vicinity of each coupling end of the central shaft 1 of the tire molding drum and the driving shaft 2 on the tire molding machine main body side to which the tire molding drum is coupled.

The central shaft 1 includes a cylindrical shaft body 1a provided with a tire molding drum (not shown) on the front end side (left side in the figure: hereinafter referred to as the left side), and a rear end side (right end in the figure: hereinafter, right side). And a cylindrical large-diameter portion 1b which is a connecting portion in which a flange 3 having a predetermined thickness is formed.
The large diameter portion 1b is formed with a hole 22 for inserting (fitting) a small diameter portion 2b, which will be described later, of the connecting portion of the drive shaft 2. A plane formed between the hole 22 and the center hole 20 serves as a contact surface 1c with the tip when the tip of the drive shaft 2 is inserted.
Further, as shown in FIG. 2, the large-diameter portion 1b is formed with fan-shaped flanges 3 provided at equal intervals (in this embodiment, every 90 °) on the outer periphery of the large-diameter portion 1b. The flange 3 corresponds to the shape of notches 11a, 11b, 11c, and 11d provided in a locking frame 10 described later.

The drive shaft 2 includes a shaft main body 2a that is rotatably supported by a tire molding machine main body (not shown) on the right side, and a small-diameter portion 2b that is a connecting portion integrally formed on the left side of the shaft main body 2a. Similar to the shaft 1, it has a cylindrical shape as a whole.
An annular fixed wall 4 having a predetermined diameter is fitted and arranged on the right side on the outer periphery of the small-diameter portion 2b, and the outer peripheral portion of the fixed wall 4 protrudes annularly to the left in the figure. Part 4a is formed. An annular piston 5, which is an example of a sliding member that can move in the axial direction, is disposed on the outer periphery of the small diameter portion 2 b adjacent to the fixed wall 4.
The left wall surface of the fixed wall 4, the inner peripheral surface of the protrusion 4 a, the right side surface of the piston 5, and the outer peripheral surface of the small diameter portion 2 b constitute a sealed air chamber 7, and the fixed wall 4 includes An air supply / exhaust passage 8 having one end opened in the air chamber 7 and the other end opened to the outside air is provided. By supplying air from a pressure supply source (not shown) which is an example of a pressing means to the air chamber 7 via the air supply / exhaust passage 8 or exhausting it to the outside air, the piston 5 can be moved in the left-right direction in the figure. it can.

  A flange 9, which is a connecting portion having the same outer diameter as the flange 3, is integrally formed on the end portion side of the large-diameter portion 1 b of the central shaft 1 of the piston 5 that faces the flange 3. The outer periphery of the flange 3 is accommodated in an annular locking frame 10 having an inverted U-shaped cross section, which is an example of a locking means capable of storing both flanges. As will be described later, for example, a person rotates the locking frame 10 in the circumferential direction of the flange 9 using a tool or the like.

FIG. 3 is an enlarged cross-sectional view of the locking frame 10.
The locking frame 10 includes a cylindrical locking frame bottom wall portion 10a, a side wall portion 10b provided on the left side (the tire molding drum side), and a side wall portion 10c provided on the right side.
As shown in FIG. 2, the left side wall portion 10b of the locking frame 10 has a notch that becomes a gap through which the fan-shaped flange 3 of the central shaft 1 passes when the central shaft 1 and the drive shaft 2 are connected. The portions 11a, 11b, 11c, and 11d are formed at the same interval as the flange 3 (in this embodiment, every 90 °).

4 is a developed view of a cross section when cut along the arc of the locking frame 10 from the arrow III-III shown in FIG. 3, and FIGS. 4A to 4D show developed views of different embodiments. ing.
As shown in FIG. 4A, the inner wall surface 12 of the side wall portion 10b of the locking frame 10 of the present embodiment is such that the wall thickness gradually changes from the notch portion 11b toward the adjacent notch portion 11a. It is formed to be thick. That is, the width between the left and right side wall portions 10b and 10c is tapered so as to become narrower as it approaches the cutout portion 11b to 11a.
The inner wall 12 in the notches 11b, 11c, 11d adjacent to the notches 11c, 11d, 11a shown in FIG. 2 has the same shape.

In addition, although the said inner wall surface 12 is formed so that it may become thick over the full length between each notch part 11a, 11b, 11c, 11d adjacent to each 11b, 11c, 11d, 11a, for example in FIG. 4B As shown in FIG. 4C, the wall thickness may be constant at the beginning from the notch 11b and gradually increase from the middle, or may gradually increase from the notch 11b to be constant from the middle as shown in FIG. 4C. Alternatively, as shown in FIG. 4D, the wall thickness may be constant at the beginning from the notch 11b, thick from the middle, and then constant.
Thus, by providing the narrow part (narrowing part) in the flange channel | path in the latching frame 10, even when the expansion / contraction amount of the disk spring mentioned later is small, flanges can fully be couple | bonded.

Referring again to FIG. 1, as shown in the drawing, a substantially frustoconical disc spring 15, which is an example of a resilient member, is adjacent to the piston 5 at the tip of the small diameter portion 2 b of the drive shaft 2. On the other hand, a predetermined number (10 in the figure) is fitted, and on the other hand, a ring 16 is fitted in an outer peripheral groove provided on the distal end side of the small diameter portion 2b as a holding stopper of the disc spring 15.
The disc spring 15 urges the piston 5 to the right by its urging force, discharges the air in the air chamber 7 from the air supply / exhaust passage 8, and moves the piston 5 to the rear end.
Instead of the disc spring 15, other means that can bias the piston 5 to the right, for example, a resilient member such as a coil spring, may be disposed on the outer periphery of the small diameter portion 2b.

  Grooves extending in the radial direction from the center are formed on the contact surfaces of the large-diameter portion 1b of the central shaft 1 and the flange 9 of the piston 5, respectively. As shown in FIG. An anti-rotation key 17 for immobilizing the drive shaft 2 and the central shaft 1 is implanted. The center shaft 1 after the connection is rotated by the driving force of the drive shaft 2 by the anti-rotation key 17.

Next, with reference to FIG.1 and FIG.2, the procedure which connects the center axis | shaft 1 to the drive shaft 2 using the said connection apparatus is demonstrated.
FIG. 5 is a flowchart for explaining the procedure of connecting the central shaft 1 to the drive shaft 2 using this connecting device.
First, air is supplied from the air supply means (not shown) into the air chamber 7 through the air supply / exhaust passage 8. The piston 5 moves to the left side by this air injection, and the locking frame 10 that covers the flange 9 of the piston 5 is moved to a position (attachment / detachment position) for attaching / detaching the central shaft 1 (S101).

Next, the center shaft 1 to which a tire molding drum (not shown) is attached is lifted by a crane, for example, and the position of the flange 3 of the large diameter portion 1b is aligned with the position of the notches 11a, 11b, 11c, 11d of the side wall portion 10b. In this state, the flange 3 is accommodated in the locking frame 10 through the notches 11a, 11b, 11c, and 11d, and the small diameter portion 2b of the drive shaft 2 is fitted into the hole 22 of the large diameter portion 1b of the central shaft 1. (S102).
At this time, the position of the groove formed on the right side surface of the large diameter portion 1b is aligned with the rotation preventing key 17 implanted in the groove on the left end surface of the flange 9, and the rotation preventing key 17 is placed in the groove. Are engaged to prevent the flanges 3 and 9 from rotating.

Next, in a state where the flange 3 is housed in the locking frame 10, the locking frame 10 is manually rotated in the circumferential direction (arrow direction in FIG. 2) using a tool or the like (S103). That is, the flanges 3 and 9 are relatively moved within the side wall portions 10b and 10c of the locking frame 3 that rotates. At that time, the interval between the side wall portions 10b and 10c of the locking frame 10 gradually changes between the notches, and in this case, both flanges 3 and 9 move relative to each other in the direction in which the interval between the side wall portions 10b and 10c gradually decreases. Then, when the locking frame 10 is rotated by a predetermined angle, both the flanges 3 and 9 are blocked by a narrow gap (narrowed portion) between the side wall portions 10b and 10c and cannot be moved further, and are in close contact with each other. Thus, the side walls 10b and 10c of the locking frame 10 are clamped and clamped.
Further, since the positions of the notches 11a, 11b, 11c, and 11d and the flange 3 are shifted by rotating the locking frame 10, there is no possibility that the flange 3 is locked and removed by the side wall 10b.

  After the flanges 3 and 9 are brought into close contact with each other, the supply of air into the air chamber 7 is stopped (S104), and when the air in the air chamber 7 is exhausted, the piston 5 is moved rightward by the biasing force of the disc spring 15. As a result of the movement and the flange 9 pressing the side wall 10c of the locking frame 10, the left wall surface of the flange 3 is pressed by the inner wall surface of the side wall 10c of the locking frame 10, and the central shaft 1 is on the drive shaft 2 side. The central shaft 1 and the drive shaft 2 are firmly connected in a state where the tip end portion of the small diameter portion 2b of the drive shaft 2 is joined (pressed) to the contact surface 1c of the large diameter portion 1b of the central shaft 1. The

  When removing the central shaft 1 from the drive shaft 2, the procedure is reversed. That is, while supporting the central shaft 1 with a crane or the like (not shown), air is supplied into the air chamber 7 from the air supply / exhaust passage 8 to move the piston 5 to the left in the figure against the biasing force of the disc spring 15. Moving. Next, the locking frame 10 is rotated in the direction opposite to the arrow in FIG. 2, the positions of the flange 3 and the notches 11a, 11b, 11c, and 11d of the locking frame 10 are aligned, and then the flange 3 is moved to the notch 11a. , 11b, 11c, and 11d. As a result, the central shaft 1 is detached from the drive shaft 2.

  As described above, in the connecting operation of the tire molding drum, by using the air pressure and the biasing force of the disc spring, the manual operation is unnecessary, and the tire molding drum is driven with the central shaft 1 of the tire molding drum firmly and with one touch. The shaft 2 can be connected.

  In order to press-join the drum shaft (center shaft) and the drum drive shaft, a connecting device that uses fluid pressure such as air pressure instead of a resilient member such as a disc spring 15 may be considered, but the fluid pressure decreases. When it does, there exists a possibility that the coupling | bonding force of a shaft may fall and a fastening may isolate | separate. For this reason, it has been considered difficult to employ fluid pressure such as air pressure. However, in the present invention, by using a resilient member such as a disc spring, it is possible to solve the problem assumed when fluid pressure such as air pressure is used. The tire molding drum can be connected safely and reliably.

  The embodiment of the present invention has been described above by taking the tire molding drum as an example. However, the present invention is not limited to the tire molding drum, but can be applied to other drums or other jigs and tools. can do. In the above description, the elastic member and the piston mechanism are provided on the drive shaft side. However, it is also possible to provide the drum shaft side.

It is a sectional side view of the connecting device of the tire molding drum concerning this embodiment. It is sectional drawing of the connection apparatus of the tire shaping | molding drum seen from arrow II. It is an expanded sectional view of a locking frame. FIG. 4A to FIG. 4D are development views of cross sections when cut along the arc of the locking frame from the arrow III-III, and FIGS. 4A to 4D respectively show development views of different embodiments. It is the flowchart which showed the procedure which connects a center axis | shaft to a drive shaft using this coupling device. It is a typical side view of the conventional tire shaping | molding apparatus. It is an axial direction sectional view of a connecting device indicated in patent documents 1. It is sectional drawing of the coupling device seen from arrow II-II. It is an axial direction sectional view of another connecting device indicated in patent documents 1. It is sectional drawing of another coupling device seen from arrow IV-IV.

Explanation of symbols

1, 101, 121 ... Center shaft, 1a, 2a ... Shaft body, 1b ... Large diameter part, 1c ... Contact surface, 2,102 ... Drive shaft, 2b ... Small diameter 3, 9, 108, 123, 124 ... flange, 4 ... fixed wall, 4a ... projecting part, 5 ... piston, 7 ... air chamber, 8 ... air supply / exhaust Passage, 10 ... Locking frame, 10a ... Locking frame bottom wall, 10b, 10c ... Side wall, 11a, 11b, 11c, 11d, 110 ... Notch, 12 ... Inside Wall surface, 15 ... disc spring, 16 ... ring, 17, 111, 136 ... non-rotating key, 91 ... tire molding drum, 92 ... rotating shaft, 93 ... molding machine body, 94... Drive shaft 104. Cylindrical member 105. Trapezoidal screw 106. Cam roller 107. Large diameter portion 1 6, 127 ... inclined surface, 128, 129 ... arc-shaped member, 130 ... bolt, 131 ... nut, 132 ... clevis member, 134 ... hinged clamp, 135 ... groove.

Claims (8)

A drum connecting device for connecting a drum shaft and a drum drive shaft,
Each of the drum shaft and the drum drive shaft has a connecting portion at its opposite end,
A sliding member slidably provided on the one connecting portion, a locking means for locking the sliding member to the other connecting portion, and a resilient member that slides the sliding member in one direction with an urging force And pressing means for pressing the sliding member in the reverse direction against the biasing force of the elastic member,
The elastic member slides the sliding member in one direction with its urging force to join the connecting ends of the connecting portions, and the pressing means reverses the sliding member against the urging force of the elastic member. A drum connecting device, wherein the connecting ends are released by sliding in a direction. The drum connecting device according to claim 1,
The drum connecting device according to claim 1, wherein the pressing means is a fluid pressurizing means capable of switching between operation and non-operation by supply and discharge of fluid. In the drum connecting device according to claim 1 or 2,
The other connecting portion has a plurality of flanges arranged at intervals in the radial direction, and the locking means is locked to the flange. In the drum connection device according to any one of claims 1 to 3,
The locking means is a rotatable annular body having an inverted U-shaped cross section consisting of a bottom wall and a side wall. The locking means is externally fitted to the flange on the outer periphery of the sliding member, and the other connecting portion is attached to one side wall thereof. A plurality of notches through which the flange can pass;
A drum connecting device characterized in that the one side wall is locked to the flange by rotating the locking means in a state where the flange of the other connecting portion is inserted. The drum connecting device according to claim 4,
The drum connecting device, wherein the flange of the other connecting portion and the flange on the outer periphery of the sliding member are connected to each other by a rotation preventing member. The drum connecting device according to claim 5,
A drum connecting device characterized in that a narrow portion is formed between the side walls of the locking means to stop and constrain the rotation-connected flange that moves relative to the side wall when rotating. In the drum connecting device according to claim 6,
The said narrow part is formed as a taper part from which the thickness of the said side wall changes, The coupling device of the drum characterized by the above-mentioned. A drum coupling method for coupling a drum shaft and a drum drive shaft,
A step of engaging a sliding member slidably provided at one connecting end of the drum shaft and the drum driving shaft with the other connecting end, and sliding the sliding member with an urging force of a resilient member. Joining the other connecting end to one connecting end, and applying fluid pressure to the sliding member to slide the sliding member against the biasing force to release the joining of the connecting end. And a step of connecting the drums.

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