JPH0531699A - Selvage slitting device for sheet-form substance - Google Patents

Abstract

PURPOSE:To prevent occurrence of selvage rise phenomenon, to reduce the exchange frequency of a member, and to facilitate a work to exchange the member. CONSTITUTION:When an eccentric disc 23 of which a rock mechanism 21 located to the one end of a blade shaft is composed is rotated, two driven members arranged to both sides of the eccentric disc in a manner to be positioned facing each other are alternately swung in a direction in which the two members are intercoupled through rotation of the eccentric disc 23. As a result, the end part of a sheet-form substance cut by a cutter is also caused to alternately enter and exit, and suction of air to a space between sheet layers and stagnation thereof can be prevented and selvage rise phenomenon can be prevented from its occurrence. A swing mechanism composed of the eccentric disc and the driven members is located to the one end part in an axial direction of the shaft of the cutter. Besides, since a mounting and demounting work is carried out through mounting and demounting of bolts 23a and 23b, maintenance is extremely facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ear slit for cutting an end portion in a sheet width direction so as to meet a predetermined standard when a wide sheet-like body such as a film tape is wound into a roll. It relates to the device.

[0002]

2. Description of the Related Art Conventionally, when a sheet-shaped body such as a wide polyethylene film is wound into a roll with a predetermined sheet width by a winding mechanism, a blade fixed to the end of the sheet-shaped body. Was used, and the edge slitting device configured to cut the sheet-like body by applying the blade edge of the fixed blade was used.

[0003]

However, in the structure of the above-mentioned conventional ear slit device, since the blade edge of the blade is always fixed at a fixed position, the edge of the sheet-like body to be wound is directly attached. Since the overlapping portions are continuous and air is easily sucked in between the layers of the edges of the adjacent end portions, the end portions Fa of the wound roll body F are compared with the central portion as shown in FIG. 9, for example. A so-called earing phenomenon occurs in which the diameter is increased. Such a raised edge phenomenon becomes more prominent as the thickness of the sheet-shaped body becomes thinner, and also occurs when the thickness of the sheet-shaped body is uneven.

As described above, not only is the appearance of the roll body F prominent when it rises, but even if the roll body F has the same diameter, the total winding length of the sheet-like body is different, and in some cases it may be more than necessary. The winding length is shortened.

Incidentally, as a means for preventing such a rising phenomenon, for example, as shown in FIG.
And a coil spring 101 provided at one axial end of the center rod 100 for urging the center rod 100 toward the other axial end, and provided at the other end of the center rod 100. Bearing 102 and eccentric disc 1 that rotates by abutting on the outer peripheral portion of bearing 102
03, the screw shaft 104 connected to the center rod 100, and the screw shaft 104, which are provided at positions at fixed distances from both ends of the screw shaft 104, and each cutting edge has a sheet-like body 105.
And a pair of blades 106 and 107 that contact the
The center rod 10 is rotated by the rotation of the eccentric disc 103.
0 is reciprocated in the axial direction, whereby the blade 10
6 and 107 are swung in the sheet width direction of the sheet-like body 106, and are wound while alternately moving the ends of the sheet-like body 106 in and out, so that air is sucked and accumulated between the ends of the overlapping sheet layers. A method of configuring to prevent was proposed.

However, in such a method, since the coil spring 101 for urging the center rod 100 in the axial direction is provided, there are the following problems.

First, the bearing 102 and the eccentric disc 10
Since 3 and the eccentric disc 103 are constantly in contact with each other due to the urging force of the coil spring 101, the eccentric disc 103 is worn out frequently and the eccentric disc 103 is frequently replaced, and the production efficiency is reduced accordingly.

Secondly, since the coil spring 101 is constantly compressed, the urging force thereof is gradually reduced, and it is not possible to make the entrance and exit of the wound sheet-like body constant. Prominence is likely to appear on the.

Thirdly, since the urging force of the coil spring 101 needs to be a certain value or more, when the eccentric disc 103 is detached, for example, when it is replaced, it is disturbed by the urging force and is smooth. There is a maintenance problem such as the removal work cannot be performed.

Fourth, at the time of exchanging the eccentric disc 103, it is necessary to arrange at least two workers on both ends of the center rod 100.

The present invention has been made to solve the above-mentioned conventional problems, and can prevent the earing phenomenon from occurring.
It is an object of the present invention to provide a sheet-shaped ear slit device in which the replacement frequency of members is low and the replacement work is easy.

[0012]

In order to achieve the above-mentioned object, the invention of claim 1 is such that the edge of the sheet-like body traveling toward the winding mechanism in the sheet width direction is cut along the traveling direction. In a sheet-shaped body edge slitting device configured to be cut by, a blade shaft for attaching the blade is provided so that its axial direction is substantially parallel to the sheet width direction, and at one end of the blade shaft. A rotating eccentric disc, and a pair of driven members that are disposed at opposite positions on the outer peripheral portion of the eccentric disc and that alternately abut with one edge of the eccentric disc. A swinging mechanism for axially reciprocating the blade shaft within a range of the eccentricity of the eccentric disc is provided.

[0013]

When the end of the sheet-like body is cut by the blade along the running direction of the sheet, the eccentric disc provided at one end of the blade shaft rotates, and the eccentric disc rotates to rotate the eccentric disc. Two driven members, which are arranged so as to face each other on both sides of the disk, alternately swing in a direction connecting the two. As a result, the end portions of the sheet-like body also come in and go out alternately, so that it is possible to avoid sucking air between the sheet layers and the retention thereof, and to prevent the earing phenomenon. Also, since the swing mechanism composed of the eccentric disc and the driven member is provided at one end portion in the axial direction of the blade shaft, and there is no biasing means such as a coil spring, the mounting and dismounting work. It is extremely easy to maintain.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 3 to 5 show an embodiment of the overall structure of an ear slit device according to the present invention.

A base plate 2 is provided at each end of the base 1.
A and 2B are fixed, the base plates 2A and 2B face each other, and inner plates 3A and 3B are arranged inside the base plates 2A and 2B, respectively. The first and second base plates 2A and 2B have the first and second positions.
Both ends of the shafts 4 and 5 are hexagonal fixing nuts 4c and 4c.
d, and 5c and 5d, respectively.
A center rod 6 is arranged between the second shaft 4 and the second shaft 5.

Here, both ends of the first shaft 4 are inserted into bushes 4a and 4b fixed to the inner plates 3A and 3B, respectively, and the second shaft is also inserted into the bushes 4a and 4b.
Both ends of the shaft 5 of the inner plate 3A,
The bushes 5a and 5b fixed to 3B respectively are inserted. Further, both ends of the center rod 6 are fixed to the inner plates 3A, 3A by lock nuts 6a, 6b.
They are fixed to B, respectively, and the ends of the both ends project to the outside of the base plates 2A and 2B via bearings 6c and 6d, respectively.

Further, the inner plates 3A, 3
In B, both ends of the screw shaft 7 are bearings 12A and 12B.
The ends of both ends of the screw shaft 7 project outside the base plates 2A and 2B, respectively, and handles 7A7B are fixed to the ends.

Here, the screw shaft 7 is formed with feed screw portions 7a and 7b which are in reverse thread relation to each other, and the feed screw portions 7a and 7b are provided with the blade holder 1 respectively.
3A and 13B are screwed, and the blade holders 13A and 13B
Straight blade-shaped blades 11A and 11B are fixed to the respective blades. The blades 11A and 11B are not limited to the straight blades, but may be round blades or the like depending on the specifications.

Further, both ends of a guide rod 8 arranged in parallel with the screw shaft 7 are fixed to the inner plates 3A, 3B by hexagon nuts 8a, 8b, respectively.
The guide rod 8 has a pair of guide bushes 10A,
10B is inserted. Both guide bushes 10A,
10B is connected to the blade holders 13A and 13B,
The blade holders 13A and 13B are movable in the axial direction of the screw shaft 7 by the rotation of the screw shaft 7.

A center holder 14 is fixed to the central portion of the screw shaft 7, while a slide key 16 is provided in the central portion of the center rod 6, and a bush 15 is engaged with the slide key 16. The bush 15 and the center holder 14 are connected to each other via a connecting member 17.

On the other hand, a motor base 18 is fixed to the base plate 2A, and a variable speed motor 19 is mounted on the motor base 18. A flange joint 20 is attached to a motor shaft 19a of the motor 19 via a reduction gear, and the flange joint 20 is connected to a swing mechanism 21.

The swing mechanism 21 is a substantially V-shaped arm 2
2 and a disk-shaped cam follower (following member) 22 fixed to both ends of the arm 22 via bolts 22a and 22b.
A and 22B, and an eccentric disc 23 arranged between the cam followers 22A and 22B. The eccentric disc 23 is formed with a pair of fixing holes h ₀ , h ₁ , h ₂ , h ₄ sandwiching the motor shaft 19a, and the eccentric disc 23 has fixing holes h ₀ , h It is adapted to be connected to the flange joint 20 via set bolts 23a and 23b which are inserted through the set of ₁ , h ₂ , and h ₄ .

Therefore, the eccentricity of the eccentric disc 23 can be easily changed by changing the combination of the insertion positions of the set bolts 23a and 23b (in FIG. 1, the state of being inserted into the fixing hole h ₀ ). It has become.

Furthermore, one end of the arm 22 is connected to the center rod 6 via a spring pin 22p.

A transport roll 2 is provided above the base 1.
4, 25, 26 are arranged, and each roll 24, 25,
A sheet-like body 27 such as a polyethylene film having an adhesive layer formed thereon runs on the sheet 26, and the sheet-like body 27 is directed toward a winding device (not shown) provided below the base 1. It has become. In addition, the sheet-like body 2
7 on both ends of the sheet in the sheet width direction.
The blade edge of is in contact.

Next, the operation of the present embodiment constructed as above will be described.

When the motor 19 is driven, the eccentric disc 2
As the 3 rotates, the eccentric disc 2 periodically contacts the cam followers 22A, 22B located at both ends in the diametrical direction. Therefore, the center rod 6 reciprocates in the axial direction according to the amount of eccentricity of the eccentric disc 23. FIG. 6 shows the relationship of the reciprocating motion in an exaggerated manner. The swing amount d is set in one cycle of the eccentric disc 23.

As described above, when the center rod 6 swings, both inner plates 3A and 3B fixed to both ends of the center rod 6 swing. As the inner shafts 3A and 3B swing, the screw shaft 7 swings in the axial direction, so that the blades 11A and 11B periodically swing in the sheet width direction of the running sheet 27.

When the two blades 11A and 11B are oscillated periodically, the cutting position of the end portion of the sheet-shaped body 27 in the sheet width direction is periodically displaced. Therefore, as shown in FIGS. Roll body 27A formed by winding the sheet-like body 27
, The positions of the adjacent end edges alternately move in and out at intervals d ′ that are substantially the same as the swing amount d, the closed space formed at the ends is reduced, and there is almost no entrained air. Further, even if the thickness of the sheet-like body 27 is not uniform, the sheet-like body 27 is balanced by the swinging.

[0030]

As described above, according to the invention of claim 1,
A sheet-shaped body edge slit device configured to cut an end portion in the sheet width direction of a sheet-shaped body traveling toward a winding mechanism with a blade along the traveling direction, a blade for attaching the blade The shaft is provided so that its axial direction is substantially parallel to the seat width direction, the eccentric disc is provided at one end of the blade shaft, and the rotating eccentric disc and the outer peripheral portion of the eccentric disc face opposite positions. And a pair of driven members alternately contacting one edge of the eccentric disc, and for reciprocating the blade shaft in the axial direction within the range of the eccentric amount of the eccentric cam. Since it is equipped with a rocking mechanism, there is almost no air trapped at both ends, and even if the thickness of the sheet is uneven, it is balanced by the rocking of the blade, and the so-called earing phenomenon is effective. Can be prevented. Furthermore, when attaching and detaching the rocking mechanism, it can be done by only attaching and detaching bolts on one end side of the blade shaft, so only one worker is required, and since elastic members such as coil springs are not used, work can be performed safely. In addition, the degree of wear of the eccentric disc and the like is reduced, and it is possible to approach the realization of maintenance free.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a rocking mechanism that is a main part of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front view of an ear slit device to which the swing mechanism shown in FIG. 1 is attached.

FIG. 4 is a top view of FIG.

5 is a side view taken along line XX of FIG.

FIG. 6 is a schematic diagram showing a swing amount by an eccentric disc.

FIG. 7 is a perspective view showing a part of a roll wound by the device of the present invention.

8 is a cross-sectional view taken along the line YY of FIG.

FIG. 9 is a perspective view showing a part of a roll body wound by a conventional winding device.

FIG. 10 is a front view showing an example of an ear slit device provided with a swing mechanism configured by using a coil spring or the like.

[Explanation of symbols]

 6 center rod, 7 screw shaft (cutting tool shaft), 11A cutting tool, 11B cutting tool, 19 motor, 21 swing mechanism, 22 arm, 22a cam follower, 22b cam follower, 23 eccentric disc, 27 sheet-like body.

Claims (1)

Claim: What is claimed is: 1. A sheet-shaped body configured to cut an end portion in the sheet width direction of a sheet-shaped body running toward a winding mechanism with a blade along the running direction. In the ear slit device, the blade shaft for attaching the blade is provided such that its axial direction is substantially parallel to the sheet width direction, is provided at one end of the blade shaft, and a rotating eccentric disc, In a range of the eccentric amount of the eccentric disc, the eccentric disc is composed of a pair of driven members arranged at opposing positions on the outer peripheral part of the eccentric disc and alternately abutting one edge of the eccentric disc. A sheet-shaped body edge slitting device comprising a swinging mechanism for reciprocating the blade shaft in the axial direction.