JPS6214029Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a winding shaft for coaxially winding two or more strips (strips of paper, cloth, etc.).

In a shaft-driven winding shaft that cuts a strip lengthwise and winds each strip on a single axis, the strip generally suffers from uneven thickness, uneven tension, and partial slack during winding. Because of the inherent non-uniformity caused by
Strictly speaking, it must be taken into consideration that the strips are wound into strips of different thicknesses and lengths.

That is, if these strips are wound on a common shaft, there will be differences in diameter and tension for each strip, so it must be considered that winding will eventually become impossible.

Therefore, conventionally, a winding shaft has been proposed in which multiple collars are lined up on a single rotating shaft to which torque is transmitted through a strip-type torque transmission mechanism, and a winding core tube for each strip is attached to each collar. However, both the mechanism for ensuring secure fixation to prevent slippage between the core tube and collar and the device for adjusting the torque in the strip-shaped torque transmission mechanism corresponding to each collar are complicated. This increases the cost and makes handling operations inconvenient, so it is not often used.In many cases, an independent winding shaft is used for each strip, which takes up less installation space in the winding section. Not only does it occupy a large area, but the winding mechanism tends to be complicated, such as requiring a separate device to spread the strip in the width direction as it approaches the strip.

Focusing on these facts, the present invention was developed with the aim of improving the multi-row winding type winding shaft, and it can be made into a simple shape that does not differ in appearance from a normal mandrel shaft. Moreover, the mechanism for fixing the winding core tube and the torque transmission mechanism for applying appropriate winding torque to each collar are mechanical systems that utilize air pressure to facilitate power transmission from the end of the rotating shaft. This aims to make the structure of the winding section more compact and ensure reliable winding.

To this end, the present invention has a double hollow shaft having a first hollow chamber and a second hollow chamber concentrically and to which rotational power is applied, and a double hollow shaft that is individually rotatable around the shaft. a plurality of winding core supporting collars formed in a multi-row arrangement and blank-fitted, and each formed in a cylindrical portion having an inner circumferential surface facing the circumferential surface of the double hollow shaft at one end side; Each of the cores has a piston rod that is provided at a rotationally symmetrical position inside the collar and that can move linearly in the radial direction toward and away from the circumferential surface of the collar, and is supplied through the first hollow chamber. A core holding actuator that allows a protruding piece at the tip of the piston rod to protrude from the circumferential surface of the collar against elastic force by the action of pressurized air for generating a holding force; Each piston rod is provided inwardly to be supported by the double hollow shaft, and has a linear movement in the radial direction that can move toward and away from the inner circumferential surface of the cylindrical portion, and the piston rods are supplied through the second hollow chamber. A winding shaft is constituted by a winding torque transmitting actuator that can press the tip of the piston rod against the inner circumferential surface of the cylindrical part by the action of the winding torque generating pressurized air, By supplying pressurized air from the shaft end of the double hollow shaft and cutting off the supply, it is possible to make the projections protrude all at once from the circumferential surface of each collar, and to securely fix the winding core tube. By supplying pressurized air with adjusted pressure from the shaft end of the double hollow shaft, it is possible to simultaneously apply appropriate winding torque to each collar using the torque actuator for transmitting winding torque. The invention is characterized in that ease of operation and reliable winding are achieved, thus achieving the intended purpose.

Next, one embodiment of the present invention will be described based on the accompanying drawings.

Figure 1 shows an example of the winding shaft of the present invention, in which 1 is a single double hollow shaft, and around the shaft 1 there are a plurality of (10 in the illustrated example) collars for supporting the winding core. (hereinafter referred to as collars) are fitted in a multi-row arrangement in which the collars 2, 2 are substantially adjacent to each other, and the appearance resembles a mandrel shaft having a winding body of an appropriate diameter, and each collar 2, 2 are covered with core tubes C, C so that strips S, S can be wound on each core tube C, C.

The main structure of the winding shaft is shown in partial cross section in FIG. 2, and the double hollow shaft 1 consists of a hollow core 10 and a sleeve shaft 11.
Each of the collars 2, 2
Large-diameter flanges 10c are provided at regular intervals corresponding to the holes 5 of the hollow shaft core 10a, and a first hollow chamber is supplied with pressurized air _A1 for generating core holding force through the shaft end. It is formed into 5.

The large diameter flange 10c has a hollow core shaft 10.
A communication hole 12 penetrating in the a direction and a communication hole 13 penetrating in the radial direction are bored.

On the other hand, the sleeve shaft 11 is formed by extending a sleeve 11c from a hollow core shaft 11a having a flange 11b.
A hollow portion is formed between the hollow core shaft 10a and the sleeve 11c, and this hollow portion is the second hollow chamber 6. The sleeve 11c is provided with through holes 14 at predetermined locations to communicate with the communication hole 13.

As described above, the double hollow shaft 1 consisting of the hollow core 10 and the sleeve shaft 11 has a first hollow chamber 5 to which core holding pressurized air (hereinafter referred to as first pressure air) A ₁ is supplied from one end of the shaft. and a second hollow chamber 6 to which pressurized air for winding torque generation (hereinafter referred to as second pressure air) _A2 is supplied from the other end of the shaft. is rotatably supported by a bearing, and rotational power (overdrive) is applied to it.

Next, the collars 2, 2 are connected to the radial bearing 15,
15, and is rotatably fitted to the sleeve 11c, which forms the circumferential surface of the double hollow shaft 1, and one end thereof is attached to the cylindrical portion 2a, where the inner circumferential surface F facing the circumferential surface of the sleeve 11c exists. The inner pocket of the cylindrical portion is a space.

In each of the above-mentioned collars 2, 2, in the solid part fitted around the sleeve 11c, the through-hole 14 is located at a rotationally symmetrical position about the double hollow shaft 1.
Holes communicating with the collar and opening on the circumferential surface are formed in the radial direction of the collar, and a core holding actuator 3 is accommodated in each hole.

As shown in FIGS. 2 and 3, these winding core holding actuators (hereinafter referred to as first actuators) 3, 3 are installed at symmetrical positions with a rotational angle of 120°, for example, to move the piston rod 7 onto the circumferential surface of the collar 2. The piston rod 7 is arranged so that it can move linearly in the radial direction toward and away from the coil spring 1.
Due to the elastic force of the collar 6, the collar 2 is normally positioned in the drawing direction away from the circumferential surface of the collar 2, and when the first pressure air _A1 is supplied to the first hollow chamber 5, this pressure air _A1 acts on the active end surface of the piston rod 7 through the communication hole 13 and the through hole 14, so that the piston rod 7 comes into contact with the circumferential surface of the collar 2 against the elastic force.

The piston rod 7 has a protruding piece 8 at its tip, and as described above, the protruding piece 8 is brought into contact with the circumferential surface of the collar ₂ by the action of the first pressure air A1.
The protruding piece 8 is made to protrude from the circumferential surface of the collar 2, and this protruding piece 8 bites into the inner wall of the core tube C, for example, a paper tube, which is formed by covering the collar 2, and thus the core tube C is attached to the collar 2. It is possible to securely hold the screws so that slips in the rotational direction do not occur between the screws.

2 and 4, reference numeral 4 denotes a winding torque transmitting actuator (hereinafter referred to as the second actuator), which is connected to the cylindrical portion 2 of the collar 2.
The sleeve 11 of the double hollow shaft 1 in the inner pocket of a
It is supported by c.

Two or more second actuators 4 are also arranged in rotationally symmetrical positions for each collar 2,
A piston rod 9 is provided so as to be capable of linear movement in the radial direction so as to be able to move toward and away from the inner circumferential surface F of the cylindrical portion 2a.

The piston rod 9 has an arc surface whose rod-side end surface can make frictional sliding contact with the inner circumferential surface F, and whose piston-side end surface faces the second hollow chamber 6, so that the second pressure air _A2 When supplied to the second hollow chamber 6, this acts to push out the piston rod 9. As a result, the tip end surface of the piston rod 9 can be pressed against the inner circumferential surface F, and the piston rod 9 can be pressed against the inner circumferential surface F. The given rotational force is transferred to the piston rod 9.
The winding torque is applied to the collar 2 according to the degree of contact pressure between
The tension on the strip S can be increased or decreased by increasing or decreasing the pressure of the second pressure air _A2 at this time.

After the winding shaft having the above-described structure has each collar 2, 2 fitted with a core tube C, both shaft ends are supported, and the first hollow chamber 5 and the second hollow chamber 6 of the hollow double shaft 1 are connected to the first compressed air _A1 line and the second compressed air _A2 line, and are also connected to a motor which provides overdrive rotation.

Then, by supplying the first pressurized air _A1 to the first hollow chamber 5 and causing the protrusion 8 to bite into the inner wall of the core tube C, a slip occurs between the collar 2 and the core tube C in the rotational direction. It can be fixed so that it does not stick.

In this case, the pressure value of the first pressure air A ₁ may be a constant high pressure.

On the other hand, by supplying the second pressurized air _A2 to the second hollow chamber 6 after adjusting the pressure value, the end surface of the piston rod 9 is brought into pressure contact with the inner circumferential surface F at an appropriate pressure.

Then, by applying overdrive rotational power to the double hollow shaft 1, strips S,
Wrap S to start winding.

At that time, it goes without saying that if the pressure of the second pressure air _A2 is in a high range, a high tension will act on the strips S, S, and the pressure value should be selected appropriately depending on the material of the strip S. .

As the winding progresses, a diameter difference and a tension difference occur between each strip as described above. Since the slip can be skillfully absorbed by the slip difference, stable winding is performed until the end.

Next, the effects of the present invention are listed as follows.

(a) A fixing mechanism for fixing the winding core tube to the collar 2 and a torque transmission mechanism for absorbing the difference in tension and the difference in winding diameter are connected to the first actuator 3.
The second actuator 4 and the second actuator 4 are separately provided in the winding shaft, so that the operation for fixing and torque transmission is reliable, as opposed to the conventional single mechanism that performs both functions. It is possible to obtain the best quality winding roll for each strip.

(b) Since both the fixing and torque transmission mechanisms are based on pneumatic pressure, it is extremely easy to introduce an actuating source to the rotating winding shaft, and by setting the pneumatic pressure, stable performance suitable for the rolled product can be achieved. can be demonstrated.

(c) In particular, by adjusting the pressure of the second pressure air _A2 , it is possible not only to obtain the optimum torque, but also to easily and reliably perform torque increase for thickening of the winding, taper tension winding, etc. .

[Brief explanation of the drawing]

Each figure shows one example of the winding shaft of the present invention.
The figure is a plan view, the upper half shows the fixed state, the lower half shows the released state, Fig. 2 is a partially shown vertical cross-sectional view, and Fig. 3 shows the second part.
The figure is a cross-sectional view taken along the line A-A, and FIG. 4 is a cross-sectional view taken along the line B-B. DESCRIPTION OF SYMBOLS 1... Double hollow shaft, 2... Collar, 2a... Cylindrical part, 3... Actuator for holding the winding core, 4... Actuator for transmitting winding torque, 5... First hollow chamber, 6... Third 2 hollow chamber, 7... piston rod,
8... Projection piece, 9... Piston rod, F... Inner circumferential surface.

Claims (1)

[Scope of utility model registration request] A double hollow shaft 1 having a concentric double first hollow chamber 5 and a second hollow chamber 6, and to which rotational power is applied;
A cylindrical portion formed by fitting this double hollow shaft 1 with a multi-row arrangement that can freely rotate around the shaft, and having an inner circumferential surface F facing the circumferential surface of the double hollow shaft 1 on one end side. A plurality of winding core supporting collars 2, 2 formed on each core 2a are provided at rotationally symmetrical positions inside the collars 2, 2, and a linear movement in the radial direction that can move toward and away from the circumferential surface of the collar is achieved. The piston rods 7 each have a piston rod 7, and the projecting piece 8 provided at the tip of the piston rod 7 resists the elastic force by the action of the pressurized air for generating core holding force supplied through the first hollow chamber 5. A winding core holding actuator 3, 3 that can protrude from the circumferential surface of the collar, is supported by the double hollow shaft 1 on the inner side of each cylindrical portion 2a of the collar 2, 2, and has a cylindrical portion. Each of the piston rods 9 has a piston rod 9 that can move linearly in the radial direction toward and away from the inner circumferential surface F of the second hollow chamber 6.
The tip of the piston rod 9 is moved into the cylindrical portion 2 by the action of the winding torque generating pressurized air supplied through the piston rod 9.
A winding shaft characterized in that it is equipped with actuators 4, 4 for transmitting winding torque that can be pressed against the inner circumferential surface F of the winding shaft.