JP4086294B2 - Winding material cutting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wound cutting device that cuts a wound (raw material) of an adhesive tape, for example .
[0002]
[Prior art]
As schematically shown in FIG. 2 , a conventional wound cutting apparatus 101 includes a main shaft 3 that rotates a cylindrical original fabric 2 in the circumferential direction, and one end of the original fabric 2 that coincides with the main shaft 3 in the axial center. 20 is provided with a support shaft 104 fitted into 20 and a rotary blade 5 that cuts the vicinity of one end 20 of the raw fabric 2. The rotational force of the main shaft 3 is transmitted to the support shaft 104 via the pad 30, and the main shaft 3 and the support shaft 104 rotate in synchronization.
[0003]
According to the wound cutting device 101, the rotary blade 5 is cut from one end 20 of the original fabric 2 from the direction crossing the support shaft 104, while the reaction force is received by the support shaft 104 and one end of the original fabric 2 is received. If 20 is cut | disconnected, the product which is the ring-shaped piece 21 can be obtained.
[0004]
Further, when the support shaft 104 is retracted in the direction away from the main shaft 3, the piece 21 is restricted from retreating together with the support shaft 104 by the stopper 110 arranged on the support shaft 104 side in this process. , It will fall off the support shaft 104. At this time, the stopper 110 advances from the illustrated position to the vicinity of the piece 21. Further, the piece 21 is carried out of the cutting apparatus 101 by sliding a chute or the like. Such a technique is disclosed in the following patent documents.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 2000-218591
[Problems to be solved by the invention]
However, since the piece 21 that falls off the support shaft 104 falls while rotating due to its inertial force, the piece 21 is strongly rubbed and damaged by the chute or the like, and the orientation of the individual pieces 21 obtained by repeating the above steps is significantly disturbed. There was a problem that the process work was hindered.
[0007]
Then, the objective of this invention is providing the cutting device of the wound material which can carry out a product smoothly to the next process in addition to preventing damage to a product .
[0008]
[Means for Solving the Problems]
The winding device cutting device according to the present invention includes a main shaft that rotates a cylindrical original fabric in the circumferential direction, a support shaft that is aligned with the main shaft and fitted into one end of the original fabric, A rotating blade for cutting the vicinity of one end and a braking means for braking the support shaft are provided.
[0009]
Further, in the wound cutting apparatus according to the present invention, the support shaft includes a drum fitted into one end of the original fabric, and a fixed shaft that rotatably supports the drum, and the braking means includes A brake shoe that faces the end surface of the drum and is slidable along the fixed shaft, an urging unit that urges the brake shoe in a direction away from the end surface of the drum, and the urging unit against the urging unit. Starting means for pressing a brake shoe against the end face of the drum.
[0010]
Furthermore, in the winding device cutting device according to the present invention, the brake shoe is formed of an annular piston that is airtightly slidable along the peripheral surface of the fixed shaft, and the starter is configured to air-operate the annular piston by air pressure. It consists of a cylinder that presses against the end face of the drum, and a path for introducing compressed air into the cylinder is formed on the fixed shaft.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1, a wound material cutting device 1 according to the present embodiment includes a main shaft 3 that rotates a cylindrical raw fabric 2 in the circumferential direction, and a main shaft 3 that coincides with the main shaft 3 and has an axial center. The support shaft 4 fitted into the one end 20, the rotary blade 5 that cuts the vicinity of the one end 20 of the raw fabric 2, and the braking means 6 that brakes the support shaft 4 are provided.
[0012]
The original fabric 2 is obtained by winding an adhesive sheet or the like around a cylindrical core material 19 in a roll shape, and has a long cylindrical shape as illustrated as a whole. The main shaft 3 includes a chuck (not shown) that is rotated by a driving source, a pad 30 that positions the axis of the support shaft 4, and a center portion 31. The pad 30 serves as a coupling that transmits the rotational force of the main shaft 3 to the support shaft 4. The chuck enters the inside of the original fabric 2, expands by air pressure or the like, and is fixed to the inner peripheral surface of the original fabric 2.
[0013]
The support shaft 4 includes a drum 40 that is inserted into the one end 20 of the raw fabric 2 so as to be movable forward and backward, and a fixed shaft 41 that rotatably supports the drum 40. One end of the drum 40 is closed by an end plate 40a for fitting the center portion 31 of the main shaft 3, and a soft material 40b that abuts the rotary blade 5 is provided on the outer peripheral surface near one end. Ball bearings 40c and 40d are provided at both ends of the drum 40, and a backup ring 40e for receiving a biasing means 61 described later is attached to the inner race of the ball bearing 40d on the other end side.
[0014]
The fixed shaft 41 is a single shaft body having a journal portion 41a to which the ball bearings 40c and 40d are attached and a sliding guide portion 41b, the outer diameter of which is changed in three stages. Although not shown, when an actuator such as an air cylinder connected to the other end (right side in the figure) of the fixed shaft 41 is operated, the entire support shaft 4 moves in the axial direction, and one end 20 of the original fabric 2 Infested inside and outside.
[0015]
The brake means 6 opposes the end surface 42 of the drum 40 and is slidable along the sliding guide portion 41 b of the fixed shaft 41, and the urging force for urging the brake shoe 60 in a direction away from the end surface of the drum 40. It comprises means 61 and starting means 62 for pressing the brake shoe 60 against the end face 42 of the drum 40. As the urging means 61, a coil spring or an air spring can be applied.
[0016]
The brake shoe 60 mainly includes an annular piston 63 that can slide in an airtight manner along the peripheral surface of the sliding guide portion 41 b of the fixed shaft 41, and a brake pad 63 a is attached to a position facing the end surface 42 of the drum 40. . The airtightness between the sliding guide portion 41b and the annular piston 63 is held by the packing p. Unless otherwise specified below, the sliding portions of the individual members are kept airtight by a packing p such as an O-ring.
[0017]
The starting means 62 is mainly composed of a cylinder 64 into which the annular piston 63 is fitted. The cylinder 64 can project and retract the annular piston 63 from an opening at one end thereof, and presses the annular piston 63 against the end surface 42 of the drum 40 by air pressure. The other end of the cylinder 64 is abutted against and closed by a stepped portion 41c at the end of the sliding guide portion 41b. A path for introducing compressed air into the cylinder 64 is a main hole 62a that passes through the center of the fixed shaft 41 and is connected to a compressor or the like via an on-off valve (not shown), and branches from the main hole 62a in the radial direction. And a branch hole 62b opened to the bottom.
[0018]
Next, a method for cutting a wound product according to an embodiment of the present invention will be described. In the following, the English letter attached to the beginning of the sentence is an index indicating the order of the steps.
[0019]
A: The main web 3 is caused to enter the main shaft 3 by causing the main shaft 3 to enter the inside of the original web 2 that is a wound material. A chuck (not shown) is fixed to the inner peripheral surface of the original fabric 2.
[0020]
B: The raw fabric 2 is rotated in the circumferential direction together with the main shaft 3 by rotating the main shaft 3.
[0021]
C: The support shaft 4 that can be rotated by being driven by the original fabric 2 is fitted into one end 20 of the original fabric 2. That is, the support shaft 4 is separated from the main shaft 3 and stands by on the right side in the drawing, and enters the one end 20 of the original fabric 2 by the operation (forward movement) of the actuator connected to the fixed shaft 41. This state is shown in FIG.
[0022]
D: The rotary blade 5 is brought closer to the vicinity of the one end 20 of the raw fabric 2 from the direction crossing the support shaft 4. In this process, while rotating the rotary blade 5 around a pivot (not shown) parallel to the main shaft 3, the rotary blade 5 is cut in the vicinity of one end 20 of the original fabric 2, while the reaction force causes the one end 20 of the original fabric 2 to bend. One end 20 of the raw fabric 2 is received by the support shaft 4 so as not to stop. At this time, the drum 40 of the support shaft 4 rotates together with the original fabric 2.
[0023]
In the step D, the operation of cutting the raw fabric 2 in the process of lowering (forward movement) the rotary blade 5 that has been waiting in advance above the support shaft 4 has been described. You may make it approach the axis | shaft 4 from the downward direction or the side.
[0024]
E: When the cutting edge of the rotary blade 5 abuts against the soft material 40b, one end 20 of the original fabric 2 is separated from the original fabric 2 to become a piece 21. On the other hand, the rotary blade 5 rises (returns) and moves away from the support shaft 4.
[0025]
F: The piece 21 immediately after being separated from the original fabric 2 in the above step E tries to continue to rotate together with the support shaft 4 by its inertia force while being received by the support shaft 4. At approximately the same time as 21 is separated, the support shaft 4 is braked, whereby the piece 21 is braked by the frictional force between the support shaft 4 and the piece 21. As a result, the piece 21 can be stopped immediately or the rotation of the piece 21 can be suppressed.
[0026]
The braking force for braking the support shaft 4 is such that compressed air is supplied into the cylinder 64 through the main hole 62a and the branch hole 62b of the fixed shaft 41, whereby the brake pad 63a of the brake shoe 60 is applied to the biasing means 61. It is obtained by pressing against the end face 42 of the drum 40. If the supply of the compressed air is stopped when the braking is finished, the urging means 61 pushes the brake shoe 60 back in the direction away from the end face 42 of the drum 40 (the other end side of the cylinder 64). 40 braking is released.
[0027]
G: When the support shaft 4 is moved to the right side in the figure by the operation (return) of the actuator described above while the braking of the drum 40 is maintained, the support shaft 4 is retracted from the one end 20 of the original fabric 2; Since the piece 21 is restricted from moving together with the support shaft 42 by the stopper 10 disposed in the vicinity of the end surface thereof, the piece 21 comes out of the support shaft 4 and falls. Thereafter, the piece 21 is carried out as a product to the next process.
[0028]
H: Although not shown, the other end of the raw fabric 2 has a sending means for sending the entire length of the original fabric 2 toward the one end 20 with a length corresponding to the width dimension of the piece 21 as one pitch. Provided. When the G step is finished, the sending means sends out the raw fabric 2 by one pitch, and then the C and subsequent steps are repeated.
[0029]
As described above, in the above step F, the piece 21 separated from the original fabric 2 can be immediately stopped or the rotation of the piece 21 can be restrained, so that the piece 21 can be kept rotating and not dropped as before. The piece 21 is not rubbed strongly against the chute or the like. In addition, it is possible to convey the individual pieces 21 obtained by repeating the above steps to the next process with a certain degree of orientation. Further, since the above braking can be instantaneously performed by air pressure, there is an advantage that the cycle time is not extended.
[0030]
It should be noted that the present invention can be implemented in a mode in which various improvements, modifications, and variations are added based on the knowledge of those skilled in the art without departing from the spirit of the present invention.
[0031]
In the above description, the operation of the individual members is exclusively performed by the air cylinder. However, this is because the compressed air supplied to the activation means 62 is shared. Therefore, a hydraulic cylinder or a solenoid may be applied instead of the air cylinder.
[0032]
【The invention's effect】
According to the winding device cutting device and the cutting method therefor according to the present invention, the piece separated from the original fabric can be braked by braking the support shaft, so that the piece 21 does not fall while rotating as in the prior art. The piece will not rub against the chute. And the advantage that it becomes easy to align the direction of a piece to some extent is acquired.
[0033]
Also, the support shaft supports the drum fitted into one end of the original fabric with the fixed shaft, and a braking force can be generated by pressing a brake shoe slidable along the fixed shaft against the end surface of the drum. As described above, the wound cutting apparatus according to the present invention is provided with the braking means without substantially increasing the outer shape of the support shaft, so that the braking means is obstructed when the support shaft enters the one end of the original fabric. It is also easy to add braking means to the existing support shaft.
[0034]
Further, since the brake shoe is composed of an annular piston and the starting means is composed of a cylinder, air pressure is directly applied to the brake shoe without interposing a transmission mechanism such as an insulator between the brake shoe and an actuator for operating the brake shoe. The brake shoe can be operated. In addition, since the annular piston and the cylinder can be arranged around the fixed axis, the size of the entire cutting device can be further reduced.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a main part of a wound cutting device according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view showing a main part of a winding device for a wound material of a conventional example.
[Explanation of symbols]
1: Cutting apparatus for wound material 2: Raw fabric 3: Main shaft 4: Support shaft 5: Rotary blade 6: Braking means 20: One end 21: Piece (product)
40: Drum 41: Fixed shaft 42: End face 60: Brake shoe 61: Biasing means 62: Starting means 63: Ring-shaped piston 64: Cylinder

Claims (2)

A main shaft that rotates a cylindrical original fabric in the circumferential direction, a support shaft that is aligned with the main shaft and fitted into one end of the original fabric, a rotary blade that cuts near one end of the original fabric, and the support shaft Braking means for braking ,
The support shaft includes a drum fitted into one end of the original fabric, and a fixed shaft that rotatably supports the drum;
The brake means is opposed to the end face of the drum and is slidable along the fixed shaft; the urging means for urging the brake shoe in a direction away from the end face of the drum; A winding device cutting device , characterized by comprising activation means for pressing the brake shoe against the end face of the drum against the means . The brake shoe is composed of an annular piston that is airtightly slidable along the peripheral surface of the fixed shaft, and the activation means is composed of a cylinder that presses the annular piston against the end surface of the drum by air pressure. The wound cutting apparatus according to claim 1 , wherein a path for introducing compressed air into the cylinder is formed.

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