CN215885703U - Preservative film cutting device convenient for replacing reel preservative film - Google Patents

Abstract

The utility model relates to a preservative film cutting device convenient for replacing a reel preservative film, which comprises a box body consisting of a base and a hatch cover, wherein an installation cavity used for accommodating the reel preservative film is arranged in the base; the method is characterized in that: the hatch cover and the base can be completely separated, the hatch cover and the base are locked at a closing position through a locking structure under the condition that the hatch cover enters the installation cavity of the base, and the hatch cover is at an opening and replacing position under the condition that the hatch cover completely exits the base. The preservative film cutting device is reasonable in structure, and the mounting part of the device can be completely taken out, so that a reel preservative film can be conveniently replaced.

Description

Preservative film cutting device convenient for replacing reel preservative film

Technical Field

The utility model belongs to the technical field of daily necessities, and particularly relates to a preservative film cutting device convenient for replacing a reel preservative film.

Background

The existing preservative film is convenient to use and is usually provided with a paper box, the opening end of the paper box is provided with cutting teeth for cutting the preservative film, the preservative film is pulled out to a proper size, and the pulled-out preservative film part is pressed downwards to cut off the preservative film part through straight teeth. The preservative film has high viscosity, so that the preservative film is not easy to cut off during cutting and can cut fingers. In addition, the preservative film paper box can only be discarded after the preservative film is used up, and can not be reused.

In order to solve the problems, a preservative film cutter which is used for accommodating preservative films and can be conveniently cut off appears on the market, and the cutter can be repeatedly used. The cutterbar structure includes the box body that is used for holding the reel plastic wrap, the box body comprises upper cover and base, the upper cover can overturn with the base and be connected, the upper cover lid forms the chamber of placing of upset reel plastic wrap when on the base, the reel plastic wrap is installed through mounting structure and is being placed the intracavity and can be rotatory around self axis, it has the confession plastic wrap to wear out the play membrane mouth that is the bar to open on the wall of box body, still install the guide rail on the wall of box body, guide rail and play membrane mouth parallel arrangement, be equipped with the slider that can slide along the guide rail on the guide rail, the blade is installed at the one side of direction of motion at least to the slider. After the preservative film is pulled out by a required length, the preservative film is tightly attached to the guide rail, the sliding block moves along the guide rail, and the upper blade cuts the preservative film.

For example, chinese utility model patent No. ZL200720034641.4 (publication No. CN201010386Y) 'preservative film cutter', for example chinese utility model patent No. ZL201120455467.7 (publication No. CN202337607U) 'a preservative film cutting box', for example chinese utility model patent No. ZL201922046505.2 (publication No. CN211545441U) 'a preservative film cutting box', all disclose such a similar preservative film cutting device.

The existing cutter has the following defects: 1. the cutter upper cover and the base are hinged together, the cutter upper cover and the base are required to be deeply placed in the cavity for placing the preservative film, the operation space is limited, and the preservative film of the reel is inconvenient to replace. 2. The reel plastic wrap has the multiple specification of different width, and the plastic wrap cutterbar most can only adapt to the reel plastic wrap of a width specification at present, uses the hommization, for the reel plastic wrap that adapts to different width specifications, then needs to buy the plastic wrap cutterbar of multiple difference, causes the waste. 3. The blade can become dull after repetitious usage to can not normally cut the plastic wrap, and the final blade of current plastic wrap cutterbar can not lift off relative to the slide rail because of adorning on the slide rail, and the slide rail dies with the box body is fixed again, can not lift off relative to the box body with the slide rail, consequently can only throw away whole cutterbar after the blade becomes dull, causes the waste.

For this reason, the existing cutters can be further improved.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide the preservative film cutting device which is reasonable in structure, can take out the mounting part completely and is convenient for replacing the reel preservative film, aiming at the current technical situation of the prior art.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a preservative film cutting device convenient for replacing a reel preservative film comprises a box body consisting of a base and a hatch cover, wherein an installation cavity used for containing the reel preservative film is arranged in the base, an installation structure used for installing the reel preservative film is arranged on the hatch cover, a preservative film cutting tool is installed at the top of the base, and a film outlet gap is formed between the combination part of the hatch cover and the base; the method is characterized in that: the hatch cover and the base can be completely separated, the hatch cover and the base are locked at a closing position through a locking structure under the condition that the hatch cover enters the installation cavity of the base, and the hatch cover is at an opening and replacing position under the condition that the hatch cover completely exits the base.

The improved cabin cover is further improved, the left side and the right side of the cabin cover are provided with connecting walls extending forwards, clamping holes are formed in the connecting walls, the left side and the right side of the base are internally provided with a hinged lock catch piece, one end of the lock catch piece is provided with clamping feet stretching into the side walls and matched with the clamping holes, the lock catch piece enables the clamping feet to keep stretching out of the mounting cavity under the action of a spring, the side walls of the base are further provided with operating buttons, the operating buttons are pressed to enable the lock catch piece to swing and further drive the clamping feet to contract inwards, and the clamping feet are clamped into the clamping holes to complete locking when the cabin cover enters the base state. The cabin cover is locked on two sides and is firmly locked, in addition, after the cabin cover is pushed into the mounting cavity, the clamping feet of the locking fastener are firstly enabled to swing outwards, after the clamping feet are aligned with the clamping holes, the locking fastener resets the clamping holes of the clamping persons under the elastic action to complete automatic locking, and only by pressing the operating buttons on two sides during unlocking, the locking fastener swings, the clamping feet are separated from the clamping holes, and the cabin cover can be taken out. The operation is convenient and fast.

According to the improved cabin cover, the left side and the right side of the cabin cover are provided with the plug pins, the front ends of the left side wall and the right side wall of the base are provided with the jack for the plug pins to be inserted, the side wall of the base is internally hinged with the trigger piece, the trigger piece can be triggered by the swinging locking piece to swing, and the trigger piece after being driven can push the plug pins to move outwards so as to drive the cabin cover to move outwards to pop out. The structure can automatically eject the hatch cover after unlocking.

For convenient manufacturing assembly, the lateral wall of above-mentioned base comprises founding wall, inner cup and enclosing cover, it is in the same place with the base shaping to found the wall, the inboard of founding the wall is located to the inner cup, the enclosing cover locate the outside of founding the wall and pass after founding the wall with the inner cup buckle is connected. Meanwhile, an operating button, a locking piece and a triggering piece are conveniently installed in the period.

Because of the connecting wall is thinner, easy to deform, the deformed connecting wall can prevent the clamping pin from being normally clamped into the clamping hole, the improvement is further realized, and the inner surfaces of the left side wall and the right side wall of the base are provided with restraining grooves for the insertion of the connecting wall. The restriction groove has a restriction effect on the connecting wall, so that the deformation of the connecting wall is avoided, and the clamping pin can clamp the clamping hole.

The installation structure comprises a first installation seat, a second installation seat and a movable installation frame, wherein a plurality of installation parts which are arranged at intervals left and right are arranged on the front inner wall of the hatch cover, and the movable installation frame can be detachably installed on the installation parts; the inner end face of the first mounting seat is provided with a first convex inserting part for inserting the fresh-keeping film of the winding drum, the outer end face of the first mounting seat is provided with a first convex inserting shaft, one connecting wall of the cabin cover is provided with a mounting hole for inserting the first inserting shaft, and the first mounting seat is inserted in the mounting hole through the first inserting shaft and can rotate around the axis of the first mounting seat; the inner end face of the second mounting seat is provided with a second plug-in part protruding outwards and used for inserting the fresh-keeping film of the reel, the outer end face of the second mounting seat is provided with a second plug-in shaft protruding outwards, the movable mounting frame is provided with a bayonet for the second plug-in shaft to be plugged in, and the second mounting seat is plugged in the bayonet through the second plug-in shaft and can rotate around the axis of the second mounting seat. At least one of the first mounting seat and the second mounting seat is arranged on the movable mounting frame, and the movable mounting frame is inserted into different mounting parts, so that the relative distance between the first mounting seat and the second mounting seat is changed to adapt to the reel preservative films with different widths, and the switching process is simple and convenient; can take off first mount pad and second mount pad during the equipment and insert in the nozzle of reel plastic wrap in advance, pack into installation cavity or removal mounting bracket with first mount pad and second mount pad again on, the placing of reel plastic wrap is convenient. The structure is a setting mode that the mounting seat can rotate along with the preservative film roll, the preservative film can be stably released by the mode, and the mounting seat can be a fixed setting mode (namely, the preservative film roll can rotate around the axis of the mounting seat relative to the mounting seat); in addition, the relative axial position of the first installation seat and the hatch cover in the structure is unchanged, and only the axial position of the second installation seat relative to the hatch cover can be changed, namely, the installation of the installation frame and different installation parts is only needed to be moved during adjustment, and the relative distance between the second installation seat and the first installation seat is changed so as to adapt to the reel preservative films with different widths.

In order to facilitate the installation of the mobile mounting frame on the installation part and the disassembly of the mobile mounting frame from the installation part, the installation part is provided with a slot, and one end of the mobile mounting frame is inserted and matched in the slot in a buckling mode; a plurality of positioning insertion ribs arranged at intervals left and right are arranged on the rear inner wall of the base, positioning holes matched with the positioning insertion ribs are formed in the other end of the movable mounting rack, and the positioning insertion ribs are inserted into the positioning holes when the hatch cover is in a closed position; the movable mounting frame is positioned at two ends, the movable mounting frame is firmly positioned and is not easy to shake, transverse displacement of the reel preservative film is avoided when the reel preservative film rotates, and the preservative film is released more stably. The periphery of the first inserting part is provided with first outward-extending elastic sheets at intervals, and the periphery of the second inserting part is provided with second outward-extending elastic sheets at intervals. The setting up of shell fragment can make the hole cooperation of grafting portion and reel plastic wrap inseparabler, guarantees that the difficult relative grafting portion axial of reel plastic wrap is moved, and the plastic wrap release is more steady, and the reel plastic wrap is little to the impact force of mount pad at the rotation in-process.

Preferably, above-mentioned plastic wrap cutting tool includes the guide rail, is equipped with the slider that can slide along the guide rail on the guide rail, and the blade is installed in the one side of direction of motion at least to the slider, be equipped with the bar mounting groove on the top of base, the guide rail passes through buckle structure and can detachably inlay in this bar mounting groove, holds and outwards pulls the slider and can pull the guide rail away from the bar mounting groove. Like this when the blade with blunt back, only need with slider and guide rail dismantle together get off change can, greatly reduced use cost reduces extravagantly simultaneously, also more environmental protection.

As a preferable mode of the fastening structure, the fastening structure includes two elastic walls which are arranged at the bottom of the guide rail and extend downwards, the two elastic walls are arranged at intervals from left to right, inward convex fastening blocks are arranged at the left and right sides in the strip-shaped mounting groove, and the elastic walls are fastened between the fastening blocks at the two sides in a state that the guide rail is inserted into the strip-shaped mounting groove; the clamping buckle is formed outside the elastic wall, the guide rail is conveniently installed in the strip-shaped installation groove in a clamping buckle mode, when the guide rail is detached, the guide rail can be pulled away from the strip-shaped installation groove by holding and pulling the sliding block outwards, and the assembly is quite convenient.

The improved structure is characterized in that the lower edge of the elastic wall is provided with a flanging inclining outwards, the top surface of the fixture block is a first inclined surface, the bottom surface of the fixture block is a second inclined surface, so that a necking with a large top and a small bottom are formed between the upper parts of the fixture blocks on two sides, a flaring with a small top and a large bottom is formed between the lower parts of the fixture blocks on two sides, and the flanging of the elastic wall is clamped and blocked below the second inclined surface when the guide rail is inserted into the strip-shaped mounting groove. The inclined plane design is conveniently packed into and is extracted the guide rail, and during the installation, the guide rail is packed into bar mounting groove and is pushed down the guide rail, and the turn-ups of guide rail both sides can contract in under the extrusion of throat and warp, makes things convenient for the elasticity wall to extrude into, and after the turn-ups crossed the throat and extruded into the flaring, the elasticity wall bullet was opened and is reset, and the turn-ups jamming is in the below on second inclined plane, accomplishes the buckle installation of guide rail. When the guide rail is disassembled, the sliding block is held and pulled outwards, the flanging overcomes the pressure applied by the second inclined surface to the sliding block, the flanging is separated upwards from the upper end of the flaring, enters the necking and then moves upwards, and the guide rail can be disassembled.

For the equipment of conveniently making, the top surface of above-mentioned base is opened there is first bar groove, and this first bar inslot buckle is connected with the installed part, and it has second bar groove to open on the installed part, and second bar groove and first bar groove constitute the bar mounting groove, the bottom surface in second bar groove is opened has the bar hole that supplies the elasticity wall to pass, and the left and right sides in first bar groove is located to the fixture block.

Compared with the prior art, the utility model has the advantages that: the box body comprises base and hatch cover two parts, and convenient equipment, hatch cover and base can separate completely, take out after the hatch cover breaks away from the base completely, pass through mounting structure dress with the reel plastic wrap on the hatch cover again, and the base can not produce the interference to the installation, and operating space is big, gets into under the installation intracavity state of base at the hatch cover, locks the cutting through locking structure between hatch cover and the base in the closed position, alright pull out the plastic wrap on the reel plastic wrap.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of the present invention;

FIG. 2 is a cross-sectional view (along the length) of an embodiment of the present invention;

FIG. 3 is a sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic perspective view of a base portion according to an embodiment of the present invention;

FIG. 5 is an exploded perspective view of a base portion in an embodiment of the utility model;

FIG. 6 is a cross-sectional view (in the width direction and along the length of the mobile mount) of an embodiment of the present invention;

FIG. 7 is a first exploded perspective view of an embodiment of the present invention;

FIG. 8 is a second exploded perspective view of the present invention;

FIG. 9 is a schematic perspective view of a hatch cover portion according to an embodiment of the present invention (accommodating a maximum width of the rolled cling film);

FIG. 10 is a schematic perspective view of a portion of a hatch cover according to an embodiment of the present invention (a roll of cling film adapted for intermediate widths);

FIG. 11 is an exploded perspective view of a hatch cover portion in an embodiment of the utility model;

FIG. 12 is a cross-sectional view (in the width direction and in the middle) of an embodiment of the present invention;

FIG. 13 is a schematic perspective view (a guide rail changing state) of the embodiment of the present invention;

FIG. 14 is a cross-sectional view (a change guide state) of an embodiment of the present invention;

fig. 15 is an exploded perspective view of an embodiment of the present invention.

Detailed Description

The utility model is described in further detail below with reference to the accompanying examples.

As shown in FIGS. 1 to 15, a first preferred embodiment of the present invention is described.

The utility model provides a conveniently change plastic wrap cutting device of reel plastic wrap, includes the box body 1 of compriseing base 11 and hatch cover 12, have the installation cavity 1a that is used for holding reel plastic wrap 2 in the base 11, be equipped with the mounting structure who is used for installing reel plastic wrap 2 on the hatch cover 12, plastic wrap cutting tool 10 is installed at the top of base 11, form out membrane clearance 1b between the combination department of hatch cover 12 and base 11.

The preservative film cutting tool 10 comprises a guide rail 101, a sliding block 102 capable of sliding along the guide rail 101 is arranged on the guide rail 101, a blade 103 is arranged on at least one side of the sliding block 102 in the moving direction, the blade 103 and the sliding block 102 are integrally formed in the embodiment, a strip-shaped mounting groove 105 is arranged on the top of the base 11, the guide rail 101 is detachably embedded in the strip-shaped mounting groove 105 through a buckling structure, and the guide rail 101 can be pulled away from the strip-shaped mounting groove 105 by holding and pulling the sliding block 102 outwards.

The buckling structure comprises two elastic walls 104 which are arranged at the bottom of the guide rail 101 and extend downwards, the two elastic walls 104 are arranged at intervals from left to right, inward convex clamping blocks 106 are arranged on the left side and the right side in the strip-shaped mounting groove 105, and the elastic walls 104 are clamped between the clamping blocks 106 on the two sides in a state that the guide rail 101 is inserted into the strip-shaped mounting groove 105; the lower edge of the elastic wall 104 has an outward-inclined flange 107, the top surface of the latch 106 is a first inclined surface 108, the bottom surface of the latch 106 is a second inclined surface 109, so that a large-top and small-bottom necking is formed between the upper portions of the latches 106 on both sides, a small-top and large-bottom flaring is formed between the lower portions of the latches 106 on both sides, and the flange 107 of the elastic wall 104 is clamped below the second inclined surface 109 in a state that the guide rail 101 is inserted into the strip-shaped mounting groove 105.

The top surface of the base 11 is provided with a first strip-shaped groove 1051, the first strip-shaped groove 1051 is internally connected with a mounting part 13 in a buckling manner, the mounting part 13 is provided with a second strip-shaped groove 1052, the second strip-shaped groove 1052 and the first strip-shaped groove 1051 form a strip-shaped mounting groove 105, the bottom surface of the second strip-shaped groove 1052 is provided with a strip-shaped hole 1053 for the elastic wall 104 to pass through, and the clamping blocks 106 are arranged at the left side and the right side of the first strip-shaped groove 1051.

During installation, as shown in fig. 13 and 14, the guide rail 101 is installed in the strip-shaped installation groove 105 and presses the guide rail 101 downwards, the flanges 107 on the two sides of the guide rail 101 are compressed and deformed under the extrusion of the necking, so that the elastic wall 104 is extruded into the flaring, when the flanges 104 are extruded into the flaring over the necking, the elastic wall 104 is sprung to reset, and the flanges 107 are clamped below the second inclined plane 109, so that the clamping installation of the guide rail 101 is completed. When the guide rail 101 is disassembled, the slider 102 is held and pulled outwards, and the flange 107 is separated upwards from the upper end of the flaring into the necking by overcoming the pressure applied to the slider by the second inclined surface 109 and then moves upwards further.

The hatch 12 in this embodiment can be completely separated from the base 11, and the hatch 12 and the base 11 are locked in a closed position by a locking structure in a state where the hatch 12 is inserted into the installation cavity 1a of the base 11, and in an open replacement position in a state where the hatch 12 is completely withdrawn from the installation cavity 1a of the base 11.

The left side and the right side of the hatch cover 12 are provided with connecting walls 121 extending forwards, the connecting walls 121 are provided with clamping holes 122, the left side wall and the right side wall of the base 11 are internally provided with locking fasteners 3, one ends of the locking fasteners 3 are provided with clamping feet 31 extending into the side walls and matched with the clamping holes 122, and the locking fasteners 3 are acted by springs 3a to ensure that the clamping feet 31 keep extending towards the inside of the mounting cavity 1 a; an operating button 4 is further arranged on the side wall of the base 11, and the operating button 4 is pressed to enable the locking fastener 3 to swing so as to drive the clamping leg 31 to retract inwards; in a state where the hatch 12 is put into the base 11, the locking is completed by the catching pins 31 being caught in the catching holes 122.

The left side and the right side of the hatch cover 12 are also provided with pins 123, the front ends of the left side wall and the right side wall of the base 11 are provided with insertion holes 111 for the pins 123 to insert, the side wall of the base 11 is also hinged with a trigger 9, the trigger 9 can be triggered by the swinging locking piece 3 to swing, and the trigger 9 after being driven can push the pins 123 to move outwards so as to drive the hatch cover 12 to move outwards to pop out.

The side wall of the base 11 is composed of a standing wall 112, an inner cover 113 and an outer cover 114, the standing wall 112 and the base 11 are molded together, the inner cover 113 is arranged on the inner side of the standing wall 112, and the outer cover 114 is arranged on the outer side of the standing wall 112, penetrates through the standing wall 112 and is connected with the inner cover 113 in a buckling mode.

The inner surfaces of the left and right side walls of the base 11 are formed with constraining grooves 115 into which the connecting walls 121 are inserted.

The mounting structure comprises a first mounting seat 5, a second mounting seat 6 and a movable mounting frame 7, a plurality of mounting parts 8 which are arranged at intervals left and right are arranged on the front inner wall of the hatch cover 12, and the mounting parts 8 are used for detachably mounting the movable mounting frame 7; the inner end surface of the first mounting seat 5 is provided with a convex first inserting part 51 for inserting the fresh-keeping film roll 2, the outer end surface of the first mounting seat 5 is provided with a convex first inserting shaft 52, one connecting wall of the hatch cover 12 is provided with a mounting hole 1211 for inserting the first inserting shaft 52, and the first mounting seat 5 is inserted in the mounting hole 1211 through the first inserting shaft 52 and can rotate around the axis of the first mounting seat; the inner end surface of the second mounting seat 6 is provided with a second inserting part 61 which protrudes outwards and is used for inserting the roll preservative film 2, the outer end surface of the second mounting seat 6 is provided with a second inserting shaft 62 which protrudes outwards, the movable mounting frame 7 is provided with a bayonet 72 for inserting the second inserting shaft 62, and the second mounting seat 6 is inserted and matched in the bayonet 72 through the second inserting shaft 62 and can rotate around the axis of the second mounting seat.

A slot 81 is arranged on the mounting part 8, and one end of the movable mounting rack 7 is inserted and matched in the slot 81 in a buckling mode; a plurality of positioning dowels 116 arranged at left and right intervals are arranged on the rear inner wall of the base 11, positioning holes 71 matched with the positioning dowels 116 are formed in the other end of the movable mounting frame 7, and when the hatch cover 12 is in a closed position, the positioning dowels 116 are inserted into the positioning holes 71; the first inserting part 51 is provided with an outward-extending first elastic sheet 511 at intervals on the periphery thereof, and the second inserting part 61 is provided with an outward-extending second elastic sheet 611 at intervals on the periphery thereof.

The placing process of the reel preservative film 2 comprises the following steps:

the hatch 12 is taken out, the operating button 4 is pressed on two sides, the locking piece 6 swings, the clamping foot 64 is separated from the clamping hole 122, the trigger piece 9 can be triggered by the swinging locking piece 3 to swing, and the trigger piece 9 after being driven can push the pin 123 to move outwards so as to drive the hatch 12 to move outwards and pop out, as shown in fig. 7 and 8. The hatch cover 12 completely exits the base 11, the first mounting seat 5 and the second mounting seat 6 are taken out, the first inserting portion 51 of the first mounting seat 5 is inserted into one side of the reel preservative film 2, the first elastic sheet 511 is in elastic contact with the inner hole wall of the reel preservative film 2, the second inserting portion 61 of the second mounting seat 6 is inserted into the other side of the reel preservative film 2, and the second elastic sheet 611 is in elastic contact with the inner hole wall of the reel preservative film 2. Then, the first inserting shaft 52 of the first mounting seat 5 is inserted into the inserting hole 1211 on one side wall of the hatch cover 12, and then the second inserting shaft 62 of the second mounting seat 6 is inserted into the bayonet 72 on the movable mounting frame 7 from the outside, so that the installation of the rolled plastic wrap 2 on the hatch cover 12 is completed, and the first mounting seat 5 and the second mounting seat 6 are installed on different installation parts 8 by moving the mounting frame 7, so as to adapt to the rolled plastic wrap 2 with an unnecessary length, as shown in fig. 9 and 10. Finally, the hatch cover 12 is plugged into the base 11, and the locking is completed by the clamping feet 31 being clamped into the clamping holes 122 when the hatch cover 12 enters the base 11. The positioning dowel bar 116 on the base 11 is inserted into the positioning hole 71 on the movable mounting rack 7, and the placement of the rolled preservative film 2 is completed.

The cutting process of the preservative film can refer to the prior art.

In order to adapt to the roll preservative films 2 with different widths, as shown in fig. 9 and 10, the positions of the movable mounting frames 7 need to be adjusted, the movable mounting frames 7 are firstly pulled out from the mounting parts 8 during adjustment, and then the corresponding other mounting parts 8 are inserted, so that the adjustment is quite convenient.

It should be noted that in the description of the present embodiment, the terms "front, back", "left, right", "up, down", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Claims (10)

1. A preservative film cutting device facilitating reel preservative film replacement comprises a box body (1) consisting of a base (11) and a hatch cover (12), wherein an installation cavity (1a) used for containing a reel preservative film (2) is arranged in the base (11), an installation structure used for installing the reel preservative film (2) is arranged on the hatch cover (12), a preservative film cutting tool (10) is installed at the top of the base (11), and a film outlet gap (1b) is formed between the combination of the hatch cover (12) and the base (11); the method is characterized in that: the hatch cover (12) and the base (11) can be completely separated, the hatch cover (12) and the base (11) are locked at a closing position through a locking structure under the condition that the hatch cover (12) enters the installation cavity (1a) of the base (11), and the hatch cover (12) is completely withdrawn from the installation cavity (1a) of the base (11) and is at an opening and replacing position.

2. The wrap cutting apparatus facilitating roll wrap replacement according to claim 1, wherein: the left side and the right side of the hatch cover (12) are provided with connecting walls (121) extending forwards, the connecting walls (121) are provided with clamping holes (122), the left side wall and the right side wall of the base (11) are internally provided with locking fasteners (3), one ends of the locking fasteners (3) are provided with clamping feet (31) extending into the side walls and matched with the clamping holes (122), and the locking fasteners (3) are acted by springs (3a) to enable the clamping feet (31) to keep extending trend towards the inside of the mounting cavity (1 a); an operating button (4) is further arranged on the side wall of the base (11), and the locking piece (3) swings to drive the clamping pin (31) to retract by pressing the operating button (4); and when the hatch cover (12) enters the base (11), the clamping pins (31) are clamped into the clamping holes (122) to complete locking.

3. The wrap cutting apparatus facilitating roll wrap replacement according to claim 2, wherein: the left side and the right side of the hatch cover (12) are further provided with pins (123), the front ends of the left side wall and the right side wall of the base (11) are provided with insertion holes (111) for the pins (123) to insert, the side wall of the base (11) is further hinged with a trigger piece (9), the trigger piece (9) can be triggered by the swinging locking piece (3) to swing, and the trigger piece (9) after being driven can push the pins (123) to move outwards so as to drive the hatch cover (12) to move outwards to pop out.

4. The wrap cutting apparatus facilitating roll wrap replacement according to claim 3, wherein: the side wall of base (11) comprises upright wall (112), inner cup (113) and enclosing cover (114), upright wall (112) and base (11) shaping together, the inboard of upright wall (112) is located in inner cup (113), enclosing cover (114) locate the outside of upright wall (112) and pass behind upright wall (112) with inner cup (113) buckle is connected.

5. The wrap cutting apparatus facilitating roll wrap replacement according to claim 2, wherein: the inner surfaces of the left and right side walls of the base (11) are formed with restraining grooves (115) into which connecting walls (121) are inserted.

6. The wrap cutting apparatus facilitating roll wrap replacement according to claim 2, wherein: the mounting structure comprises a first mounting seat (5), a second mounting seat (6) and a movable mounting rack (7), a plurality of mounting parts (8) which are arranged at left and right intervals are arranged on the front inner wall of the hatch cover (12), and the mounting parts (8) are used for detachably mounting the movable mounting rack (7); the inner end surface of the first mounting seat (5) is provided with a first inserting part (51) protruding outwards and used for inserting the fresh-keeping film roll (2), the outer end surface of the first mounting seat (5) is provided with a first inserting shaft (52) protruding outwards, a connecting wall (121) of the cabin cover (12) is provided with a mounting hole (1211) for inserting and matching the first inserting shaft (52), and the first mounting seat (5) is inserted and matched in the mounting hole (1211) through the first inserting shaft (52) and can rotate around the axis of the first mounting seat; the inner end face of the second mounting seat (6) is provided with a second inserting portion (61) which is protruded outwards and used for inserting the fresh-keeping film roll (2), the outer end face of the second mounting seat (6) is provided with a second inserting shaft (62) which is protruded outwards, a bayonet (72) which is used for inserting the second inserting shaft (62) in a matching mode is arranged on the movable mounting seat (7), and the second mounting seat (6) is inserted in the bayonet (72) through the second inserting shaft (62) and can rotate around the axis of the second mounting seat.

7. The apparatus for cutting plastic wrap facilitating roll change of plastic wrap according to claim 6, wherein: a slot (81) is formed in the mounting part (8), and one end of the movable mounting rack (7) is inserted into the slot (81) in a buckling mode; a plurality of positioning insertion ribs (116) arranged at left and right intervals are arranged on the rear inner wall of the base (11), positioning holes (71) matched with the positioning insertion ribs (116) are formed in the other end of the movable mounting frame (7), and when the hatch cover (12) is in a closed position, the positioning insertion ribs (116) are inserted into the positioning holes (71); the periphery of the first inserting part (51) is provided with an outward-opening first elastic sheet (511) at intervals, and the periphery of the second inserting part (61) is provided with an outward-opening second elastic sheet (611) at intervals.

8. The wrap cutting apparatus facilitating roll wrap replacement according to claim 1, wherein: preservative film cutting tool (10) are including guide rail (101), are equipped with slider (102) that can slide along guide rail (101) on guide rail (101), and blade (103) are installed in slider (102) one side at the direction of motion at least, be equipped with bar mounting groove (105) on the top of base (11), in guide rail (101) set up this bar mounting groove (105) through buckle structure can be dismantled, hold and outwards pull slider (102) and can pull away guide rail (101) bar mounting groove (105).

9. The apparatus for cutting plastic wrap facilitating roll change of plastic wrap according to claim 8, wherein: the buckling structure comprises two elastic walls (104) which are arranged at the bottom of the guide rail (101) and extend downwards, the two elastic walls (104) are arranged at left and right intervals, inward-convex clamping blocks (106) are arranged on the left side and the right side in the strip-shaped mounting groove (105), and the elastic walls (104) are clamped between the clamping blocks (106) on the two sides in a state that the guide rail (101) is inserted into the strip-shaped mounting groove (105); the lower edge of the elastic wall (104) is provided with a flanging (107) inclining outwards, the top surface of the clamping block (106) is a first inclined surface (108), the bottom surface of the clamping block (106) is a second inclined surface (109), so that a large-upper-part necking is formed between the upper parts of the clamping blocks (106) on two sides, a small-upper-part flaring is formed between the lower parts of the clamping blocks (106) on two sides, and the flanging (107) of the elastic wall (104) is clamped below the second inclined surface (109) in the state that the guide rail (101) is inserted into the strip-shaped mounting groove (105).

10. The apparatus for cutting plastic wrap facilitating roll change of plastic wrap according to claim 9, wherein: the top surface of base (11) is opened there is first bar groove (1051), and snap joint has installed piece (13) in this first bar groove (1051), and it has second bar groove (1052) to open on installed piece (13), second bar groove (1052) and first bar groove (1051) constitute bar mounting groove (105), the bottom surface of second bar groove (1052) is opened has bar hole (1053) that supplies elasticity wall (104) to pass, the left and right sides in first bar groove (1051) is located in fixture block (106).

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