JPH11333948A - Apparatus for cutting/fusing lengthy member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for cutting/fusing a lengthy member with improved durability. SOLUTION: An upper part seal block 108 descends so that a cylindrical sheet on a conveyance route 101 is pushed to the upper surface heat-fusion parts 112, 112 of a lower seal block 111 and to a cutting blade 105 which ascends synchronously and is driven to rotate to be cut. Since the cutting blade rotates in a horizontal plane to be prevented from being twisted, the peeling of seams and cracks is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cutting and fusing long members for fusing and cutting long members such as sheets.

[0002]

2. Description of the Related Art Conventionally, a cutting and fusing apparatus for fusing and cutting a long member has been used in various fields such as a bag making machine for producing shopping bags. FIGS. 4 to 6 are diagrams showing a process of manufacturing a shopping bag using a bag making machine, and an outline thereof will be described below. 4 to 6
, The same parts are denoted by the same reference numerals. When manufacturing the shopping bag 401 made of a thermoplastic synthetic resin such as polyethylene as shown in FIG. 4, first, a long tubular sheet 501 made of a thermoplastic synthetic resin is prepared. Here, the tubular sheet-like material 501 is formed by flattening a tubular member into a sheet shape, and has a folded portion 502 formed by folding both sides of the tubular member inward in a V-shape.

Next, the tubular sheet 501 is introduced into a bag making machine, and the tubular sheet 501 is intermittently conveyed by the length of the shopping bag 401 in the bag making machine. When the object 501 is at rest, the tubular sheet-shaped object 501 is cut, and the front and rear sides of the cut portion 503 are heat-sealed to form a heat-sealed portion 403, thereby forming a bag body 504 in which both ends are sealed. I do. Thereafter, after bundling a large number of bags 504, one end of the bag 504 is cut into a U-shape including the tops of the V-shaped folded portions 502 on both sides, so that the hand-held portion 405 and the opening 404 are formed. Forming, thereby,
The shopping bag 401 is completed. Reference numeral 601 denotes a hole formed when a large number of bags 504 are bundled and inserted into pins for bundling the bags 504.

In the above-described bag making machine and the like, when a long sheet-like material such as the cylindrical body 2 is cut to form a sheet-like material such as a fixed-size bag 504, a shearing (shearing) method is used. And a flying knife method using a knife attached to an endless belt driven and rotated.

[0005]

However, the conventional cutting method described above has a problem in durability, and the shearing method and the flying knife method cause wear of the cutting edge, and the hot knife method has a cylindrical sheet on the cutting edge. Since the titanium oxide contained in the state substance adheres and the residue of the synthetic resin is burned, the durability is poor and none of them can withstand continuous use. The present invention has been made in view of the above problems, and has as its object to provide an apparatus for cutting and fusing long members with improved durability.

[0006]

SUMMARY OF THE INVENTION According to the present invention, there is provided an apparatus for cutting and fusing a long member, the apparatus for fusing a long member and cutting with a cutting blade. The endless cutting blade is constituted by a driving means for rotating and driving the endless cutting blade in a horizontal plane, and a support base for supporting the endless cutting blade so as to be able to move up and down. The endless cutting blade is driven to rotate in a substantially horizontal plane by a driving means, and is supported by a support table so as to be able to move up and down to cut the long member.

A cutting and fusing apparatus for a long member according to the present invention has a pair of block members having a cutting blade accommodating concave portion and at least one of which can move up and down, and fusing by sandwiching the long member. An endless cutting blade that circulates through the cutting blade housing recess of one of the block members, a driving unit that circulates the endless cutting blade in a substantially horizontal plane, and supports the endless cutting blade so as to be able to move up and down. And a support base. The long member is fused by being sandwiched between a pair of block members, and is cut by an endless cutting blade that goes up and down while rotating in a horizontal plane. Note that a polishing member for polishing the endless cutting blade may be provided.

[0008]

1 to 3 are views showing an apparatus for cutting and fusing long members in a bag making machine according to an embodiment of the present invention. FIG. 1 is a front view, and FIG. 2 is a partial plan view. FIG. 3 and FIG. 3 are partial side views, in which the same parts are denoted by the same reference numerals.

The cutting and fusing apparatus for a long member shown in FIGS. 1 to 3 is used to convert a shopping bag 401 or the like into a long cylindrical sheet made of a thermoplastic synthetic resin such as polyethylene as shown in FIGS. In the apparatus for manufacturing from the object 501, the cylindrical sheet 501 is intermittently conveyed by the length of the shopping bag 401, and when the cylindrical sheet 501 is stationary,
The tubular sheet 501 is cut, and the cut portion 5 is cut.
By forming the sealing portion 403 by heat-sealing the front and rear portions of the bag 02, a bag 504 having both ends sealed is formed, and the bag 504 functions to be bundled.

Referring to FIG. 1, reference numeral 101 denotes a conveying path for a tubular sheet-like material 501 which is a long member, which is located on a horizontal plane, and which has conveying rollers 102 and 103 above and below the conveying path 101.
And a lower seal block 111 as a block member is fixedly provided in front of the lower conveying roller 103. Then, on the upper surface of the lower seal block 111, heat fusion parts 112, 112 are formed at front and rear positions along the conveying direction of the sheet 501, and the heat fusion parts 112, 112 are formed.
Cutting blade housing recess 1 opening on the upper surface and both side surfaces between 112
20 are formed.

A receiving stand 114 is provided in front of the lower seal block 111, and a hot pin 113 for heat-sealing and binding is provided on the receiving stand 114.
Are protruded and retracted on the upper surface of the receiving table 114 by an air cylinder 115, and a receiving plate 116 is attached to a front portion of the receiving table 114 so as to be rotatable in a vertical direction.
A movable body 110 is provided above the lower seal block 111 so as to be able to move up and down, and an upper seal block 108 as a block member is movably mounted in a vertical direction below the movable body 110. Urged downwards.

On the lower surface of the upper seal block 108, pressing portions 121, 121 are formed at front and rear positions along the conveying direction of the tubular sheet-like material 501, and the pressing portions 121, 121 are formed.
Cutting blade housing recess 12 opened on the lower surface and both side surfaces between 21
2 are formed. In front of the upper seal block 108 provided on the movable body 110, a plug 123 for the receiving base 114 is provided so as to be able to move up and down, and a through hole 124 for a hot pin 113 is formed in the plug 123.

As shown in FIG. 2, two rollers 104, 104 are disposed on both sides of the transport roller 103. The rollers 104, 104 are rotatably mounted on a support table 107 by shafts 106, 106. Supported, one roller 10
4 is rotationally driven by a motor (not shown). A band-shaped cutting blade 105 such as an endless band saw is suspended between the rollers 104. The rollers 104, 104
And the motor constitutes driving means.

Further, as shown in FIG.
Is supported by a guide member 201 formed on a support table 107 and having a guide groove, and is driven to rotate in a direction perpendicular to the conveying path 101 of the tubular sheet-like material 501 and in a horizontal plane. This cutting blade 105 has an upper surface as a blade edge 301,
A part of the cutting blade 105 is a lower seal block 111
Is immersed in the cutting blade housing recess 120. The cutting blade 105 is disposed such that a portion disposed in the lower seal block 111 is orthogonal to the transport path 101 of the tubular sheet 501. By rotating one of the rollers 104 by a motor, the cutting blade 105 circulates through the guide portion 201 and the cutting blade housing recess 120 of the lower seal block 111. At this time, the cutting 105 is
It rotates while maintaining the state where the width direction is orthogonal to the sheet-like material 501 of the transport path 101.

The support table 107 is supported by a cam mechanism or the like (not shown) so as to be able to move up and down.
The movable body 11 rises and descends in synchronization with the descending and rising of 0.
0 is lowered and the pressing portions 121 and 121 are
When abutting on the sheet 112, the upper end of the blade edge 301 of the cutting blade 105 protrudes from the cutting blade disposing recess 120, contacts the sheet, and cuts the sheet 501. That is, the support 10
When the cutting blade 7 is at the lowermost position as shown in FIG.
05 is immersed in the cutting blade housing recess 120, but when the support table 107 is at the uppermost position, the upper end of the blade edge 301 of the cutting blade 105 is moved from the cutting blade housing recess 120 to the cutting blade housing of the upper seal block 108. The cylindrical sheet 501 protrudes into the portion 122 and is thereby cut.

Next, the operation of the present embodiment will be described in detail. When one roller 104 is rotated by the motor, the cutting blade 105 rotates in the arrow direction of FIG. In this state, the pair of upper and lower transport rollers 102 and 103 are intermittently rotated in a direction indicated by an arrow at a predetermined angle in synchronization with each other.
The cylindrical sheet 501 sandwiched between 2 and 103 is intermittently transported by the length of the shopping bag 401. When the transport rollers 102 and 103 are stationary, that is, when the tubular sheet 501 is stationary, the movable body 110 and the insertion body 123
Decrease by a predetermined stroke.

When the movable body 110 is lowered, the pressing portions 121, 121 of the upper seal block 108 are brought into contact with the upper surface heat-sealed portions 112, 112 of the lower seal block 111,
Each of the cylindrical sheet-like objects 501 in the transport path 101 is provided with a spring 109.
And the pressing portions 121, 1
21 and are fused. At the same time, the support table 107 rises in synchronization with the lowering of the movable body 110, and the upper end of the cutting edge 105 of the cutting blade 105 is raised in a state where the pressing portions 121, 121 are in contact with the heat-sealing portions 112, 112. A tubular sheet 501 protruding upward from the cutting blade accommodating recess 120.
Disconnect.

At this time, the rollers 104, 1
Since the cutting blade 105 always rotates in the direction of the arrow shown in FIG. 4, the cutting portion of the cutting blade 105 is different every time, and only a part is not worn. Can be used for Also,
If the cutting blade 105 is not removed and a polishing roller (not shown) as a polishing member is brought into contact with the blade edge 301 automatically or manually at regular intervals to perform polishing,
It is not necessary to remove the cutting blade 105 when the blade edge 301 is worn or the like, so that the machine stop time can be reduced.

Since the lower edge and the side surface of the cutting blade 105 are supported by the guide portion 201, there is no displacement even when the tubular sheet 501 is pressed. The bag 504 formed as described above is inserted into the plug 123
The through hole 124 of the insertion body 123 is
To fit the hot pin 113 projecting upward, it is inserted into the hot pin 113.

Thereafter, the movable body 110 and the insertion body 123
Are raised by a predetermined stroke, and
Is lowered by a predetermined stroke, returns to the original state shown in FIG. 1, and the next conveyance by the conveyance rollers 102 and 103 is performed. By repeating the above operation, a fixed-length bag body 504 is sequentially formed from the long tubular sheet-like material 501, and the formed bag body 504 is inserted into the hot pins 113 and bundled.

The bundled bags 504 are
By the heat of 3, the hot pin 113 is vertically fused and integrated around the hot pin 113 (peripheral portion of the hole 601 shown in FIG. 6). In this state, the hot pin 113 is lowered by the air cylinder 115 to be integrated. Bag body 50
Four bundles 117 can be sent to the next step.

As described above, according to the present embodiment,
The upper seal block 108 descends and presses the sheet-like material 501 on the conveying path 101 against the upper heat-sealed portions 112 of the lower seal block 111, and at the same time, moves upward to drive in a horizontal plane. Since the sheet 501 is pressed against the cutting blade 105 to be cut,
Is reliably cut. When the cutting blade 105 rotates in a plane inclined with respect to the horizontal plane, the cutting blade 105
There is a possibility that the cutting blade 105 is twisted due to the necessity of making the surface vertical, and the seam (welded portion) may be cracked or peeled off. However, in the present embodiment, the cutting blade 105 rotates in a horizontal plane. There is no twisting, and therefore no cracking or peeling of the seam occurs, the durability is improved, and the life can be extended.

Further, when the cutting blade 105 is rotated in a plane inclined with respect to a horizontal plane, the cutting blade 105 may come into contact with the lower seal block 111 and the cutting blade 105 may be worn. By rotating the cutting blade 105 in a horizontal plane as in the embodiment described above, such a defect can be eliminated, the durability can be improved, and there is an effect that the life can be extended.

Further, since the lower edge and the side surface are supported by the guide portion of the cutting blade 105, there is no displacement even when the sheet is pressed. In the present embodiment, the cutting blade 105 is rotated in the horizontal plane. However, the above-described effect can be obtained even when the cutting blade 105 is rotated in an inclination range where twisting does not occur, that is, in a substantially horizontal plane. Further, various modifications are possible, such as a configuration in which the lower seal block 111 can be moved up and down, and the invention can be applied to other than a bag making machine.

[0025]

According to the present invention, since the cutting blade is constituted by an endless cutting blade and the cutting blade is driven to rotate in a substantially horizontal plane, the cutting blade is not twisted. Even if there is a seam, there is no cracking or peeling of this portion, and there is an effect that the durability is improved and the life is prolonged. Further, it is possible to prevent a situation in which the cutting blade and the guide portion come into contact with each other and the cutting blade and the guide portion are worn and deteriorated, so that there is an effect that the durability is improved and the life is extended.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a partial plan view of the embodiment of FIG.

FIG. 3 is a partial side view of the embodiment of FIG. 1;

FIG. 4 is a diagram showing a shopping bag.

FIG. 5 is an explanatory diagram of a manufacturing process of a shopping bag.

FIG. 6 is an explanatory diagram of a manufacturing process of a shopping bag.

[Explanation of symbols]

 104: Roller constituting drive means 105: Cutting blade 107: Support table 120, 122: Cutting blade housing recess 108: Upper seal block as a block member 111: As a block member Lower seal block 501: tubular sheet as long member

Claims (3)

[Claims] 1. A cutting and fusing apparatus for a long member for fusing a long member and cutting with a cutting blade, wherein the cutting blade comprises an endless cutting blade, and the endless cutting blade is substantially in a horizontal plane. 1. A cutting and fusing apparatus for a long member, comprising: a driving means for rotating and driving the endless cutting blade; 2. A cutting blade accommodating recess having at least one of which can move up and down, and a pair of block members fused by sandwiching a long member, and a cutting blade accommodating recess of one of the block members. An endless cutting blade that rotates, a drive unit that rotates the endless cutting blade in a substantially horizontal plane, and a support base that supports the endless cutting blade so as to be able to move up and down. Cutting and fusing device for measuring members. 3. The apparatus for cutting and fusing a long member according to claim 1, further comprising a polishing member for polishing the endless cutting blade.