JP3117660B2 - Plastic film cutting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an apparatus for mainly processing discontinuous cutting lines in a plastic film.

[0002]

2. Description of the Related Art Plastic film bags P represented by garbage bags and shopping bags are shown in FIGS. 10 (a) and 11 (a).
As shown in the figure, a protruding piece p is often used for binding or carrying. Since the plastic film bag is formed by feeding a tubular plastic film with or without gusset at a predetermined pitch and performing heat sealing and cutting, it is preferable that the protruding piece p is also formed by this in-line bag-making method. In the case where such projections and handles are formed in-line for each feed pitch, generally, FIG.
As shown in FIG. 11B and FIG. 11B, it is necessary to make a cutting line C having a desired planar shape on the tubular plastic film F. However, the conventional cutting device arranges a pedestal made of a compressible elastic body represented by a sponge on the moving path of the film, and arranges a press mechanism that suspends a cutting blade above the pedestal, The cutting line is formed by operating the press mechanism while the pitch feed of the film is stopped, and forcing the cutting blade into contact with the receiving table.

However, in such a structure, the cutting edge of the cutting blade is liable to be worn in a short period of time, so that the expensive cutting blade must be replaced frequently, and the bag making operation cannot be performed during the replacement of the cutting blade. There was a problem that productivity fell. As a countermeasure, even if an insertion groove having a contour corresponding to the planar contour of the cutting blade is formed in the receiving table, the receiving table is made of an elastic body such as sponge, and the film is inserted each time the cutting blade descends. Since the openings are locally strongly contacted with the edge made of an elastic material, the edge portion is dripped or worn with an increase in the number of cutting processes. For this reason, the film is pushed into the insertion groove together with the cutting blade in a V-shape when the cutting blade descends without the tension of the film against the pin, and the cutting blade comes into contact with the film at a deep portion in the groove to cut the cutting line. Become. Moreover, the cutting debris gradually accumulates at the bottom of the insertion groove, making it difficult to maintain a sufficient depth for the cutting blade to enter. For this reason, there is a problem that a clean cutting line cannot be reliably inserted and the sharpness of the cutting blade is also reduced at an early stage. In addition, as a processing method of a tubular plastic film, a slit-shaped cutting line is often inserted in a film width direction or a film longitudinal direction. In this case, a cutting device having the above-described structure is conventionally used. Therefore, it has been difficult to reliably and stably process a clean cutting line for a long period of time.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a film having a relatively simple structure and having a high thickness and a high waist. It is an object of the present invention to provide a plastic film cutting apparatus capable of providing a clean cutting line for a long period of time irrespective of the above conditions and keeping the life of the cutting blade long.

[0005]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a press type having a cutting blade receiver and a cutting blade tool which is located above the cutting blade receiver and which is raised and lowered by a driving means to cut a plastic film. In the cutting device, a projection that is similar to the planar contour of the cutting edge portion and is wider than the width of the cutting edge is provided on the upper surface of the cutting edge receiver made of a hard body, and the cutting edge extends downward from the top surface of the projection edge. The cutting blade receiver is provided with a plastic film receiving mechanism capable of floating and sinking in a region outside the protrusion, and a plastic film receiving mechanism is provided on the cutting blade side. A pressing mechanism for pressing the plastic film receiving mechanism against the plastic film receiving mechanism, and the protrusion is relatively protruded by the sinking of the plastic film receiving mechanism by the pressing mechanism. Cutting unit in this state tensioned section line Frames regions for the stick film is a structure in which the contact with the cutting line Frames planned area. (Claim 1) The plastic film receiving mechanism has a plate having a high coefficient of friction on its surface and an elastic member for supporting the surface of the plate in a normal state so as to substantially coincide with the top surface level of the projection.

The present invention also provides a press-type cutting apparatus comprising a cutting blade receiver and a cutting blade positioned above the cutting blade receiver and moved up and down by a driving means to cut a plastic film. A blade escape groove that is similar to the planar contour of the cutting edge portion and is wider than the cutting edge width on the upper surface of the receiving portion, and that allows the insertion and removal of the cutting edge portion downward from the top surface of the projection edge. The cutting blade receiver is provided with a plastic film receiving mechanism that can be shrunk in the outer region of the protrusion, and on the cutting blade side, the plastic film F is pressed against the plastic film receiving mechanism. The pressing mechanism is disposed, and the protrusion is relatively protruded by the compression of the plastic film receiving mechanism by the pressing mechanism, and a cutting line frame planning area of the plastic film is formed on the top surface of the protrusion. Cutting unit in this state tensioned is a structure in which the contact with the cutting line Frames planned area. (Claim 3) In this case, the plastic film receiving mechanism is made of an elastic material represented by a sponge, and is fixed to the cutting blade receiver such that the surface of the elastic material is substantially equal to the top surface level of the projection in a normal state. . The presser mechanism is
The groove has a groove-like opening having a plane contour which is substantially similar to the plane contour of the cutting blade part and allows free insertion and removal of the cutting blade part, and which is substantially similar to the plane contour of the protruding ridge and which is appropriately larger than this. It is preferable to have a configuration including a pressing plate suspended from a mount table to which the cutting tool is fixed, and an elastic material interposed between the mount table and the pressing plate to bias the pressing plate.

[0007]

The cutting apparatus according to the present invention is usually installed on a film feed path of a bag making machine. The plastic film is placed on the cutting blade receiver and the plastic film receiving mechanism by feeding. When the driving means is operated in this state, the pressing plate of the pressing mechanism projecting from the cutting blade portion first comes into contact with the plastic film and presses it against the plastic film receiving mechanism. As a result, the plastic film is frictionally held at the same time, and at the same time, due to the sinking or compression of the plastic film receiving mechanism, the vicinity of the cut portion of the plastic film is tensioned by the elasticity inherent in the plastic film, and the top of the protrusion is formed. It is stretched on the surface. Then, when the cutting blade tool descends, the cutting blade portion enters the blade escape groove of the protrusion, but at the start of the penetration, the cutting blade hits the plastic film in a state where the pin and the tension are applied as described above, so And the cutting line is neatly applied. At the same time, the cutting blade portion is in contact with the plastic film in a state where the cutting is applied, and a cutting line is formed. Therefore, the sharpness of the cutting blade tool can be maintained for a long time, and the life can be extended.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 5 show a first embodiment of a plastic film cutting apparatus according to the present invention. 1
Is a base, which is fixed on the film feeding path of the bag making machine body. The base 1 has uprights 2 at at least four corners. Is configured. A cutting blade receiver (receiving die) 4 having a width appropriately larger than the width W of the tubular plastic film F is fixed on the base 1 of the frame. A translation type actuator (for example, a fluid pressure cylinder) 5 is fixed to the top plate 3, and a mounting table 6 is fixed to an operation portion (a piston rod in this example) 50 of the translation table 5. The guide pins 60 provided on the top plate 3 can be moved up and down while maintaining the balance by being inserted through the top plate 3. A cutting blade 7 is fixed to the lower side of the mount base 6, and a tubular plastic film F is provided near the cutting blade 7 with the cutting blade holder 4.
A pressing mechanism 8 for pressing the pressure is attached.

The shape and contour of the cutting blade 7 are arbitrary. In this embodiment, in order to obtain a plastic bag having projections p, p as shown in FIG. 10 (a), the cutting blade 7 is generally substantially W-shaped or vertical E as shown in FIG. 2 (c).
The cutting edge portion 70 at the lower end has a cutting edge portion 70a for continuous cutting and a cutting edge portion 7 for discontinuous cutting in this example.
0b is a series of combinations. As shown in FIGS. 2 (c) and 2 (d), the continuous cutting edge portion 70a has four portions in the direction parallel to the feeding direction of the tubular plastic film F (the right and left rising lines and the inner rising line of W). The cutting blade portion 70b for discontinuous cutting is formed at three portions (the base of each rising line portion of W) in a direction intersecting with the feeding direction of the tubular plastic film F. As shown in FIG. 2D, the continuous cutting edge portion 70a has a shape in which peaks and valleys are continuous as viewed from the front, and the discontinuous cutting edge portion 70b has a slit 700 having a required width at the base of each valley. The slit 700 allows the portion not cut to the tube to remain. When the tubular plastic film F is provided with a gusset as shown in the figure, the continuous cutting edge portion 70a with respect to the outermost portion in the tube width direction is a folded tip of the gusset fg, fg as shown in FIG. It is preferable to be provided so as to be located outside the line. The cutting blade 7 is fixed to a block-shaped mounting member 60 by a mounting screw in a region above the cutting blade. The mount member 60 is fixed to the mount base 6 and has the same contour as the cutting blade 7 in plan view.

The cutting blade receiver 4 is made of a hard rigid material such as metal, and has a disk shape wider than the tubular plastic film F. Then, on the upper surface, that is, the surface facing the cutting blade 7, the cutting blade 7 of the cutting blade 7 is provided.
A projection 40 having a plane outline similar to the plane outline of 0 is provided, and a recess 41 is formed around the projection 40. The concave portion 41 does not need to be provided in the entire area of the cutting blade receiver 4 and may not be provided in the peripheral portion of the cutting blade receiver 4 as shown in FIGS. The protruding strip 40 is sufficiently wider than the blade width of the cutting blade portion 70 of the cutting blade 7, and the top surface 400 has a linear or very gentle curvature shape. It has a blade escape groove 42 wider than the width. The blade escape groove 42 penetrates the cutting blade receiver 4, and a waste receiving groove 100 corresponding to the blade relief groove 42 is formed in the base 1 below the cutting blade receiver 4.

The cutting blade receiver 4 is provided with a plastic film receiving mechanism 9 for forming tension on the plastic film in cooperation with the protrusions 40 and the holding mechanism 8. It is preferable that the plastic film receiving mechanism 9 has anti-slip performance. In this embodiment, a plate 9a having a high surface friction coefficient and an elastic member 9b supporting the plate 9a are provided. Specifically, the plate 9a is made of a main body 90 made of a hard material such as a metal plate or a plastic plate.
Is formed by stretching a thin layer of a high coefficient of friction piece 91 made of a rubber plate, sponge, or the like on the upper surface. As shown in FIGS. 2A and 3, the plate 9 a has a groove 92 having a contour substantially matching the planar contour of the protrusion 40, and is arranged in the recess 41 of the cutting blade holder 4. The concave portion 41 is provided with bottomed cylindrical holes 410 at predetermined intervals, and a support shaft 9c connected to the plate 9a is arranged in the cylindrical holes 410. A spring is interposed between the lower surface of the plate 9a and the bottom of the cylindrical hole 410 as the elastic member 9b, and a stopper 94 is attached to the lower end of the spindle passing through the cylindrical hole 410. The plate 9a is pushed up by the elastic member 9b, and is set so that the surface of the high friction coefficient piece 91 substantially coincides with the upper end level of the protrusion 40 in a normal state. Although the plate 9a is shown as a single piece in the drawing, the present invention is not limited to this. The plate 9a is divided into a plurality of pieces (for example, two pieces in the width direction) and arranged so that their end faces contact or approach each other. Including the case that has been.

The pressing mechanism 8 includes a pressing plate 8 facing the plate 9a.
a, a plurality of suspension shafts 8b which penetrate the mounting base 6 and fix the pressing plate 8a at the lower end thereof, the pressing plate 8a and the mounting base 6
And a resilient material 8c such as a urethane or a coil spring for urging the pressing plate 8a. The pressing plate 8a is set so as to be located below the cutting edge of the cutting blade in a normal state. As shown in FIGS. 2B and 3, the pressing plate 8 a has a groove 80 which substantially matches the plane contour of the cutting blade 70 and allows the cutting blade 70 to be freely inserted and removed. It has a groove-like opening 81 which is substantially similar to the plane outline of the projection 40 and is appropriately larger than the plane outline. The elastic member 8c has a spring force that appropriately exceeds the spring force (elasticity) of the elastic member 9b.

FIGS. 6 to 8 show a second embodiment of the present invention. In this embodiment, the cutting blade receiver 4 is made of a hard and rigid material such as a metal, and the cutting blade tool 7 as shown in FIG.
A projection 40 having a planar contour similar to the planar contour of the cutting blade 70 is protrudingly provided on a surface opposed to the above. The protruding strip 40 is wider than the blade width of the cutting blade portion 70 of the cutting blade 7 and is flat or lower from the flat upper end.
It has a blade relief groove 42 wider than the zero blade width. The blade escape groove 42 extends through the plate thickness of the cutting blade receiver 4. The plastic film receiving mechanism 9 'is contractible in this embodiment. That is, the plastic film receiving mechanism 9 ′ has a planar elastic material 9 d typified by sponge or soft rubber, and is stretched on the upper surface of the cutting blade receiver 4. As shown in FIG.
Has a groove 92 having a contour substantially matching the plane contour of
It has a thickness such that it substantially matches the upper end level of the protrusion 40 in a no-load state. The illustrated elastic member 9d is a single piece, but is not limited thereto. That is, this includes the case where a single piece is presented in a state where it is divided into a plurality of pieces (for example, two pieces in the width direction) and is stretched on the cutting blade receiver 4 in such a manner as to abut each other. The other configuration is the same as that of the first embodiment, and the corresponding portions are denoted by the same reference numerals and description thereof will be omitted.

The above embodiments are merely examples of the present invention,
The cutting blade portion 70 is not limited to being a composite type in which the cutting blade portion 70a for continuous cutting and the cutting blade portion 70b for discontinuous cutting are combined, and only the cutting blade portion 70a for continuous cutting or FIG. Cutting edge portion 7 for discontinuous cutting as in case of obtaining
0b. Further, the cutting blade portion for continuous cutting is not limited to a triangular continuous blade as shown in the figure, but includes a blade serving as a knife blade for forming a slit.
Further, the planar contour of the cutting blade 70 is not limited, and includes a case where the cutting blade 70 is linear. In this case, the projections 40, the grooves 92 of the plastic film receiving mechanisms 9, 9 ', and the grooves 80 of the pressing mechanism 8 are respectively formed so as to correspond to the planar contour of the cutting blade.

FIG. 9 shows an application example of the cutting line forming apparatus according to the present invention. a is a body of a bag making machine, and a frame c for mounting a raw material A in which a tubular plastic film F is wound in a coil shape is disposed at an end portion or a rear portion thereof. Reference numeral b denotes a cutting device according to the present invention mounted on the airframe a, which is provided on a moving path of the tubular plastic film F drawn out of the gantry c, and requires a flat surface on the tubular plastic film F. A cutting line C having a shape such as a W shape or a U shape is formed. Reference numeral d denotes a heat sealing mechanism disposed downstream of the cutting device b. In this example, the heat sealing mechanism comprises a roll d1 and a heat blade d2 which can move forward and backward in opposition to the roll d1, and has a W-shaped or U-shaped cutting line C. A two- or one-line seal m is applied along the film width direction at or near the downstream end of the film.

Reference numeral e denotes a cutting mechanism provided further downstream of the heat sealing mechanism. The vicinity of the seal m (between the seal lines in the case of a two-line seal) is cut in the film width direction to form a bag. It is for. In this example, the cutting mechanism e includes a fixed blade e1 and a movable blade e2 cooperating therewith. f is a mooring mechanism provided near the cutting mechanism, and is a region k surrounded by the cutting line C provided as described above.
For cutting off the area k from the bag body, and includes, for example, a piercing pin f1 and a vertically movable pressing member f2 for pressing the area k surrounded by the cutting line C. g is a folding mechanism provided downstream of the mooring mechanism f, and has a pair of pinch rollers g1 and a pushing plate g2 which advances and retreats into a gap between them. The folding mechanism g is operated under the condition that the ground mooring mechanism f is operated and the area k surrounded by the cutting line C is moored, and the pushing plate g2 pushes the middle portion in the longitudinal direction of the bag body into a pair. By pressing the bag into the pinch roller g <b> 1, the bag is folded in two, and at the same time, a tensile force is applied, so that the region k surrounded by the cutting line C is forcibly cut along the cutting line C. In addition,
The use position of the device of the present invention is not limited to the case where it is located upstream of the heat sealing mechanism d as in the example of FIG. Nor.

[0017]

Next, the operation and operation of the embodiment of the present invention will be described. In the first mode, as shown in FIG. 1 (a), when the cutting blade 7 and the pressing mechanism 8 are at the standby position, the raw material A
Tube-shaped plastic film F drawn from
Is introduced on the cutting blade receiver 4, is extended forward on the machine body a so as to pass therethrough, and is held by the pitch feed mechanism. This state is shown in FIGS. 4 (a) and 5 (a), and the tubular plastic film F is placed on the plastic film receiving mechanism 9. In this state, cutting line processing is started. First, when the actuator 5 is operated, the mount base 6 is lowered, whereby the pressing plate 8a of the pressing mechanism 8 is turned into a tubular plastic film F.
Touching the upper surface of As a result, the tubular plastic film F is prevented from slipping due to friction with the plate 9a having a high friction coefficient of the plastic film receiving mechanism 9. At this time, the cutting blade portion 70 of the cutting blade 7 is not in contact with the tubular plastic film F but stands by through the groove 80 formed on the pressing plate 8a of the pressing mechanism 8 located above.

As the mount base 6 continues to descend, the pressing plate 8a presses the tubular plastic film F against the plastic film receiving mechanism 9 by the spring force of the elastic member 8c. This is the state shown in FIGS. 4B and 5B. The elastic member 9b that lifts the plate 9a of the plastic film receiving mechanism 9 has a higher spring force than the elastic member 8c that urges the pressing plate 8a. Is small, the plate 9a is
0 starts to sink into the recess 41 from the state where it is at the same level as that of the tubular plastic film F.
Is firmly held between the pressing plate 8a and the plate 9a. At the same time, as described above, the plastic film area other than the cutting line processing area is lowered as the plate 9a sinks, so that the protrusions 40 relatively protrude, whereby the tensile force is applied to the tubular plastic film F. The region where the cutting line is to be processed is formed on the top surface 40 of the protrusion 40 by its elasticity.
At 0, tension is applied and the pin becomes tense. Then, when the mount table 6 continues to descend in this state, the cutting blade portion 70 of the cutting blade 7 reaches the upper end of the protrusion 40 and comes into contact with the cutting line processing scheduled area in the tension added state as described above. As shown in FIG. 5C and FIG. 5C, the cutting blade 70 penetrates through the thickness of the tubular plastic film F by entering the blade escape groove 42 from the top surface 400 of the projection 40. Therefore, even if the tubular plastic film F is thick, thin, or stiff,
The intended cutting line is processed reliably and neatly.

After the cutting edge portion 70 has entered the blade escape groove 42 to the required depth, the cutting operation of the actuator 5 causes the blade escape groove 4 to move.
2. Then, the pressing plate 8a is lifted and the pressing of the plastic film receiving mechanism 9 against the plate 9a is weakened, and the pressing plate 8a is turned into a tubular plastic film F.
One cycle of processing is completed by separating from. The scum generated by the above-described processing falls from the blade escape groove 42 into the scum storage groove 100 of the base 1. Therefore, there is no restriction on the entry of the cutting blade 70 due to the accumulation of scum.

In the second embodiment, the tubular plastic film F is provided with a plastic film receiving mechanism 9 '.
On the planar elastic member 9d. Next, when the mount base 6 is lowered by the operation of the actuator 5, FIG.
As shown in (a), the tubular plastic film F is sandwiched between the pressing plate 8a of the pressing mechanism 8 and the planar elastic member 9d, and when the pressing plate 8a of the pressing mechanism 8 descends due to the subsequent lowering of the mount base 6, The planar elastic member 9d is an elastic member 8c.
It starts to be compressed because the spring constant is smaller than that. As a result, as shown in FIG. 8 (b), the region where the cutting line of the tubular plastic film F is to be processed is tensioned on the top surface 400 of the projection 40 according to the degree of descent of the planar elastic material 9d, and the pin is tensed. It will be in a state of having done. In this state, the cutting blade portion 70 of the cutting blade 7 reaches the upper end of the protrusion 40 and comes into contact with the cutting line processing scheduled region in the tension added state as described above. When the cutting blade 70 further descends, as shown in FIG. 8C, the cutting blade 70 enters the blade escape groove 42 from the top surface 400 of the projection 40, so that the cutting blade 70 becomes a tubular plastic film F.
Through the thickness of. For this reason, even if the tubular plastic film F is thick, thin, or stiff, a desired cutting line can be processed reliably and neatly.

In the example shown in FIG. 9, a cutting line C having a plane W or a vertical E contour is formed on the tubular plastic film F as a whole. In this example, the state of the cutting line is four in the direction parallel to the tube feeding direction as shown in FIG.
The continuous cutting lines c1, c2, c3, and c4 at the locations are processed. However, in the direction intersecting with the tube feeding direction, cutting is not performed at the slit portion of the cutting blade portion for discontinuous cutting 70b, and therefore, the direction intersecting with the tube feeding direction has three discontinuous cutting lines c5, c6, c3. c7 is processed. After the cutting line processing, the pitch feed mechanism is operated, the tubular plastic film F is transferred forward, and the bottom seal m is formed in the film width direction near the cutting line C by the heat sealing mechanism d. Next, the film is cut and cut in the width direction by a cutting mechanism e (n is a cutting separation line) to form a bag element. Next, the inside of the cut area is moored by the mooring mooring mechanism f, and in this state, the folding mechanism g operates, and the cutting line C is completely cut by the tensile force generated by folding the bag body into two. Separated and removed from the bag body.

[0022]

According to the first aspect of the present invention described above, the cutting blade receiver 4 is provided with the hard protrusions 40,
A plastic film receiving mechanism 9 which can float and sink on the outside thereof and a pressing mechanism 8 for pressing the plastic film against the plastic film receiving mechanism 9 always keep the film portion of the area to be cut at the top surface 40 of the projection 40.
At 0, tension is forcibly applied, and the cutting is performed by bringing the cutting blade portion 70 of the cutting blade 7 into contact with the film in a state where the tension is forcibly applied in advance. For this reason, a relatively simple structure enables a clean cutting line to be applied over a long period of time regardless of the thickness of the film or the strength of the waist, etc. can get. According to claims 3 and 4,
In the same manner as in the first aspect, the tension is forcibly applied to the film portion of the scheduled cutting area by the top surface 400 of the projection 40, and in this state, the cutting blade 70 of the cutting blade 7 is brought into contact to perform cutting. Moreover, since the plastic film receiving mechanism 9 'uses a planar elastic material represented by a sponge, the structure can be simplified and the number of parts can be reduced. An excellent effect is obtained.

[Brief description of the drawings]

FIG. 1A is a vertical sectional front view showing a first embodiment of a plastic film cutting apparatus according to the present invention in a standby state;
(B) is a longitudinal sectional front view similarly showing the state at the time of cutting.

2A is a cross-sectional view taken along line XX of FIG. 1A,
1B is a sectional view taken along line YY in FIG. 1A, FIG. 1C is a sectional view taken along line ZZ in FIG. 1A, and FIG. 1E is a cutting blade used in the present invention. It is a perspective view which shows an example.

FIG. 3 is an enlarged view of FIG.

4 (a) is an intermediate omitted sectional view showing a cutting blade lowering start state of the first embodiment, FIG. 4 (b) is an intermediate omitted sectional view showing a plastic film pressing start state, and FIG. 4 (c) is a cutting state using the cutting blade. It is an intermediate omission sectional view shown.

5A is a partially enlarged view showing a cutting blade lowering start state of the first embodiment, FIG. 5B is a partially enlarged view showing a plastic film pressing start state, and FIG. 5C is a part showing a cutting state by the cutting blade. It is an enlarged view.

FIG. 6A is a longitudinal sectional front view showing a second embodiment of the plastic film cutting apparatus according to the present invention in a standby state;
(B) is a longitudinal sectional front view similarly showing the state at the time of cutting.

FIG. 7 is a partially cutaway plane of the plastic film receiving mechanism in the second embodiment.

8A is a cross-sectional view showing a cutting blade lowering start state according to a second embodiment, FIG. 8B is a cross-sectional view showing a plastic film pressing start state, and FIG. 8C is a cross-sectional view showing a cutting state using the cutting blade. is there.

9A is a side view showing an example of a bag making machine to which the present invention is applied, and FIG. 9B is an explanatory view showing a state change of the plastic film in FIG. 9A.

10A is a plan view of a plastic film showing an example of a cutting process according to the present invention, and FIG. 10B is a plan view of a bag obtained.

FIG. 11 (a) is a plan view of a plastic film showing another example of the cutting process according to the present invention, and FIG. 11 (b) is a plan view of the obtained bag.

[Explanation of symbols]

 Reference Signs List 4 cutting blade receiver 6 mount base 7 cutting blade tool 8 holding mechanism 8a pressing plate 8c elastic member 9, 9 'plastic film receiving mechanism 9a plate 9b elastic member 40 protrusion 42 blade relief groove 70 cutting blade 80 groove 81 groove opening

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B26D 1/09 B26D 3/00

Claims (5)

(57) [Claims] 1. A press-type cutting apparatus comprising a cutting blade receiver and a cutting blade tool located above the cutting blade receiver and moved up and down by a driving means to cut a plastic film. A protrusion 40 which is similar to the planar contour of the cutting blade 70 and is wider than the cutting blade width is provided on the upper surface, and a blade escape which allows insertion and removal of the cutting blade 70 downward from the top surface of the protrusion 40. A groove 42 is formed, and a plastic film receiving mechanism 9 is provided on the cutting blade receiver 4 so as to be able to float up and down in the outer region of the protrusion 40. On the cutting blade side, a plastic film F is provided with the plastic film receiver. A pressing mechanism 8 for pressing against the mechanism 9 is arranged,
Plastic film receiving mechanism 9 by presser mechanism 8
The projections 40 are relatively protruded due to the sinking of the projections, and tension is applied to the cutting line frame planned area of the plastic film at the top surface 400 of the projections 40, and in this state, the cutting blade 70
A plastic film cutting apparatus characterized in that a cutting line is in contact with a cutting line frame planned area. 2. The plastic film receiving mechanism 9 has a plate 9a having a high coefficient of friction on its surface and an elastic member 9b for supporting the surface of the plate 9a so that the surface of the plate 9a substantially coincides with the top surface level of the projection 40 in a normal state. The plastic film cutting device according to claim 1, wherein 3. A press-type cutting apparatus comprising a cutting blade receiver and a cutting blade tool located above the cutting blade receiver and moved up and down by a driving means to cut a plastic film. A groove 40 which is similar to the planar contour of the cutting blade 70 and is wider than the cutting blade width, and a blade escape groove which allows the cutting blade 70 to be inserted and removed from the top surface of the protrusion 40 downward. The cutting blade receiver 4 is made of an elastic material 9d, and is fixed to the cutting blade receiver 4 so that the surface of the elastic material 9d substantially matches the top surface level of the projection 40 in a normal state. The protrusion 40
The plastic film receiving mechanism 9 'is arranged in the outer region of the plastic film, and the plastic film receiving mechanism 9' is disposed on the cutting blade side.
A pressing mechanism 8 for pressing the plastic film receiving mechanism 9 ′ with the plastic film receiving mechanism 9 ′. Wherein a tension is applied to the cutting line frame planned area of the plastic film so that the cutting blade portion 70 is in contact with the cutting line frame planned area in this state. 4. A plastic film receiving mechanism 9 'is made of an elastic material 9d represented by a sponge, and is attached to the cutting blade receiver 4 such that the surface of the elastic material 9d substantially coincides with the top surface level of the projection 40 in a normal state. The plastic film cutting device according to claim 3, which is fixed. 5. A pressing mechanism 8 includes a pressing plate 8a suspended from a mounting table 6 to which a cutting blade 7 is fixed, and a pressing plate 8a interposed between the mounting table 6 and the pressing plate 8a. The pressing plate 8a has a resilient material 8c, and the pressing plate 8a is substantially similar to the plane contour of the cutting edge 70 and the groove 80 for allowing free insertion and removal of the cutting edge, and the plane contour of the projection 40. 4. The plastic film cutting device according to claim 1, wherein the plastic film cutting device has a groove-shaped opening 81 having a plane profile that is appropriately larger than this.