CN218974016U

CN218974016U - PE protection film stretching clamp

Info

Publication number: CN218974016U
Application number: CN202223128575.0U
Authority: CN
Inventors: 顾明涛
Original assignee: Meidi Dianuo Suzhou Biological New Material Technology Co ltd
Current assignee: Meidi Dianuo Suzhou Biological New Material Technology Co ltd
Priority date: 2022-11-24
Filing date: 2022-11-24
Publication date: 2023-05-05
Anticipated expiration: 2032-11-24

Abstract

The utility model provides a PE protective film stretching clamp, which belongs to the technical field of protective film clamps and aims to solve the problem of inconvenient fixation during PE protective film stretching detection, and comprises the following components: the device comprises a mounting handle, a tension sensor, a clamping plate connecting block, a fixed clamping plate, a film fixing strip and a compaction supporting plate; the upper end of the tension sensor is fixedly connected to the lower end of the mounting handle, the tension sensor is a device for converting physical signals into measurable electrical signals and outputting the measurable electrical signals, and the tension sensor is electrically connected with the film stretching detector; the clamping plate connecting block is fixedly connected to the lower end of the tension sensor; the upper end of the fixed clamping plate is inserted into the inner side of the clamping plate connecting block; the film fixing strip is inserted into the inner side of the upper end of the fixing splint; the upper end of the compaction supporting plate is connected to the front end of the clamping plate connecting block; the PE protective film stretching clamp improves the convenience in use.

Description

PE protection film stretching clamp

Technical Field

The utility model belongs to the technical field of protective film clamps, and particularly relates to a PE protective film stretching clamp.

Background

The PE protection film is a polymer film material with wide application, in the production process of the PE protection film, the PE protection film needs to be subjected to tensile property detection, when the PE protection film is subjected to tensile detection, the PE protection film is cut into a long strip sample with a certain size, then two ends of the PE protection film are directly fixed on a tensile fixture of a tensile tester, the sample needs to be kept in a flat state, and the PE protection film tensile fixture generally comprises a clamping block, a locking bolt, a tension sensor, a connecting head and other parts.

For example: patent number CN202121974485.6 discloses a PE film stretching mechanism; the utility model relates to a PE film stretching mechanism which comprises a fixed block and a screw rod, wherein the fixed block is provided with a chute, the chute is conical, two clamping blocks are arranged in the chute, the clamping blocks are in sliding connection with the chute, the upper end of the screw rod is provided with a connecting rod and a rotary handle, the screw rod is in threaded fit with the rotary handle, the screw rod penetrates through the upper end of the fixed block to reach the chute and is connected with the two clamping blocks, the screw rod is in sliding connection with the fixed block, the rotary handle is in rotating connection with the fixed block, and the screw rod is in limiting connection with the clamping blocks.

Based on the above, when the current PE protection film is fixed on the stretching clamp, the sample of the PE protection film is lighter and thinner, the space between the clamps of the film stretching instrument is smaller, the PE protection film is directly fixed on the clamps to operate inconvenient, and the PE protection film is easy to be interfered by external factors to deform in a curling way when being fixed, and the PE protection film is inclined after being fixed, so that the accuracy of a detection result is affected.

Accordingly, in view of the above, research and improvement are made on the conventional structure and the conventional defects, and a PE protective film stretching jig is provided to achieve the purpose of having more practical value.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a PE protective film stretching clamp for solving the problem that the conventional PE protective film stretching detection is inconvenient to fix.

The utility model discloses a PE protective film stretching clamp, which is characterized by comprising the following specific technical means:

a PE protective film stretching jig comprising: the device comprises a mounting handle, a tension sensor, a clamping plate connecting block, a fixed clamping plate, a film fixing strip and a compaction supporting plate; the upper end of the tension sensor is fixedly connected to the lower end of the mounting handle, the tension sensor is a device for converting physical signals into measurable electrical signals and outputting the measurable electrical signals, and the tension sensor is electrically connected with the film stretching detector; the clamping plate connecting block is fixedly connected to the lower end of the tension sensor; the upper end of the fixed clamping plate is inserted into the inner side of the clamping plate connecting block; the film fixing strip is inserted into the inner side of the upper end of the fixing splint; the upper end of the compaction supporting plate is fixedly connected to the front end of the clamping plate connecting block.

Further, the installation handle includes: installing a bolt; the mounting bolt is inserted into the upper end of the mounting handle.

Further, the splint connecting block includes: a splint plug; the clamping plate inserting block is inserted in the middle of the clamping plate connecting block; the fixed splint comprises: a clamping plate fixing block; the splint fixed block is fixedly connected to the upper end of the fixed splint.

Further, the splint connecting block also comprises: a latch block and an anti-falling latch; the bolt block is fixedly connected to the lower end of the front side of the clamping plate connecting block; the anti-falling bolt is inserted on the bolt block.

Further, the fixed splint further comprises: the movable clamping plate, the fixing groove and the fixing protrusion; the upper end of the movable clamping plate is connected with the upper end of the fixed clamping plate in a sliding way; the fixing grooves are provided with a plurality of groups, and the plurality of groups of fixing grooves are uniformly formed in the inner side end face of the fixing splint; the fixed bulges are provided with a plurality of groups, and the fixed bulges are uniformly and fixedly connected to the inner side end surface of the movable clamping plate.

Further, the fixed splint further comprises: the guide slide bar, the slide bar connecting block and the closing spring; the two groups of slide bar connecting blocks are fixedly connected to the upper end of the fixed clamping plate; the two groups of guide slide bars are fixedly connected to the upper end of the movable clamping plate and are respectively and slidably connected to the inner sides of the connecting blocks of the two groups of slide bars; the rear end of the closing spring is fixedly connected to the rear end of the guide sliding rod, and the front end of the closing spring is fixedly connected to the rear end of the sliding rod connecting block.

Further, the fixed splint further comprises: compressing the connecting blocks; the compressing connecting block is of a U-shaped shell structure and is fixedly connected to the middle part of the front end face of the movable clamping plate; the compaction support plate comprises: a compression bolt; the compression bolt threaded connection is in the middle part of compressing tightly the backup pad, and compression bolt rear end swing joint is compressing tightly the inboard of linking the piece.

Further, the film fixing strip comprises: the movable pressing strip, an upper magnetic strip and a lower magnetic strip; the upper end of the movable pressing strip is hinged to the upper end of the film fixing strip; the upper magnetic stripe is fixedly connected to the inner side of the movable pressing strip; the lower magnetic stripe is fixedly connected to the inner side of the film fixing strip.

Further, the film fixing strip further comprises: a positioning strip; the locating strip is fixedly connected to the inner side of the film fixing strip.

Further, the film fixing strip further comprises: a fixed bar handle and a handle stop block; the fixing strip handle is fixedly connected to the left end of the film fixing strip; the handle stop block is fixedly connected to the right end of the handle of the fixing strip.

Compared with the prior art, the utility model has the following beneficial effects:

when the PE protective film sample is detected, the film fixing strips are firstly fixed at the two ends of the PE protective film sample, the PE protective film sample is preliminarily fixed outside the detector, the operation space is large, the sample can be horizontally fixed, the operation is simple and convenient, the convenience of PE protective film sample fixing is improved, the film fixing strips are clamped at the two ends of the PE protective film sample to prevent the protective film from curling deformation when being fixed, the accuracy of a detection structure is improved, when the PE protective film sample is stretched, one end of the PE protective film sample is broken at the inner side of the fixing clamp plate, the compression bolt is loosened, the film fixing strips are pulled out, and then the PE protective film with the film fixing strips broken by moving is removed from the fixing clamp plate, so that the convenience of device use is improved.

The PE protective film fixing device is provided with the positioning strips, when the PE protective film is placed on the film fixing strips, the edges of the upper end and the lower end of the PE protective film sample are aligned with the positioning strips, so that the PE protective film sample is prevented from being inclined when being fixed, the PE protective film sample is stressed more uniformly when being stretched, and the accuracy of PE protective film detection is improved.

According to the clamp plate inserting block and the compression bolt, the clamp plate inserting block and the compression bolt can be designed in a separated mode, and after a new clamp is replaced, the compression bolt is used continuously, so that the utilization rate of the compression bolt is improved, the use of a clamping screw on the PE protection film clamp is reduced, and the clamp structure is simplified.

According to the PE protective film fixing device, the convenience of fixing the PE protective film in stretching is improved, the PE protective film broken in the clamp is taken out conveniently and simply, the convenience of using the device is improved, the PE protective film sample is effectively prevented from being inclined in fixing, the accuracy of PE protective film detection is improved, and the clamp is simple in structure and convenient to use.

Drawings

Fig. 1 is a schematic view of the overall left front view structure of the present utility model.

Fig. 2 is a schematic view of the overall back structure of the present utility model.

Fig. 3 is a schematic view of the fixture of the present utility model in a disassembled configuration.

Fig. 4 is a schematic view of the structure of the fixing splint of the present utility model.

FIG. 5 is a schematic view of the structure of the film fixing strip of the present utility model.

In the figure, the correspondence between the component names and the drawing numbers is:

1. a mounting handle; 101. installing a bolt; 2. a tension sensor; 3. a clamping plate connecting block; 301. a splint plug; 302. a latch block; 303. an anti-falling bolt; 4. a fixed clamping plate; 401. a clamping plate fixing block; 402. a movable clamping plate; 403. a fixing groove; 404. a fixing protrusion; 405. a guide slide bar; 406. the slide bar is connected with the block; 407. a closing spring; 408. compressing the connecting blocks; 5. a film fixing strip; 501. a movable pressing bar; 502. the magnetic stripe is arranged; 503. a lower magnetic stripe; 504. a positioning strip; 505. a fixing bar handle; 506. a handle stop; 6. a pressing support plate; 601. and (5) pressing the bolt.

Detailed Description

Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the utility model but are not intended to limit the scope of the utility model.

In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Examples:

as shown in fig. 1 to 5:

the utility model provides a PE protective film stretching clamp, which comprises: the device comprises a mounting handle 1, a tension sensor 2, a clamping plate connecting block 3, a fixed clamping plate 4, a film fixing strip 5 and a pressing supporting plate 6; the upper end of the tension sensor 2 is fixedly connected to the lower end of the mounting handle 1, the tension sensor 2 is a device for converting physical signals into measurable electrical signals and outputting the measurable electrical signals, and the tension sensor 2 is electrically connected with the film stretching detector; the clamping plate connecting block 3 is fixedly connected to the lower end of the tension sensor 2; the upper end of the fixed clamping plate 4 is inserted into the inner side of the clamping plate connecting block 3; the film fixing strip 5 is inserted into the inner side of the upper end of the fixing splint 4; the upper end of the compaction supporting plate 6 is fixedly connected with the front end of the clamping plate connecting block 3.

Wherein, installation handle 1 is including: installing a bolt 101; the mounting bolt 101 is inserted into the upper end of the mounting handle 1; in the use, peg graft in the mount pad of film tensile detector with installation handle 1, peg graft the junction of installation handle 1 and film tensile detector with installation bolt 101, PE protection film tensile fixture is fixed to film tensile detector, easy operation is convenient.

Wherein, splint connecting block 3 is including: a cleat insert 301; the clamping plate inserting block 301 is inserted in the middle of the clamping plate connecting block 3; the fixed splint 4 comprises: a cleat fixing block 401; the clamping plate fixing block 401 is fixedly connected to the upper end of the fixing clamping plate 4; in the use, insert splint fixed block 401 to splint connecting block 3 inboard, insert splint insert block 301 and make fixed splint 4 upper end fixed to splint connecting block 3 inboard, and then conveniently change the fixed splint 4 of different specifications, the convenience that hoisting device used.

Wherein, splint connecting block 3 still includes: a latch block 302 and a release preventing latch 303; the bolt block 302 is fixedly connected to the lower end of the front side of the clamping plate connecting block 3; the anti-falling bolt 303 is inserted into the bolt block 302; in the use, after fixed splint 4 upper end is fixed to splint connecting block 3 inboard, inserts anticreep bolt 303, makes splint insert 301 fixed to the bolt piece 302, and then prevents splint insert 301 not hard up droing, promotes PE protection film stretching jig's stability of use.

Wherein, fixed splint 4 still includes: a movable clamp plate 402, a fixing groove 403 and a fixing protrusion 404; the upper end of the movable clamping plate 402 is connected with the upper end of the fixed clamping plate 4 in a sliding way; the fixing grooves 403 are provided with a plurality of groups, and the plurality of groups of fixing grooves 403 are uniformly formed on the inner side end surface of the fixing splint 4; the fixed protrusions 404 are provided with a plurality of groups, and the fixed protrusions 404 are uniformly and fixedly connected to the inner side end surface of the movable clamp plate 402; in the use, the PE protection film upper end is put into between fixed splint 4 and the movable splint 402, and fixed recess 403 and fixed protruding 404 interlock are in the same place when fixed splint 4 press from both sides tightly, and the PE protection film is the inboard that the wave was fixed at fixed splint 4, and then has promoted the clamping effect of fixed splint 4 to the PE protection film, prevents that the PE protection film from droing when tensile.

Wherein, fixed splint 4 still includes: a guide slide bar 405, a slide bar link 406 and a closing spring 407; the two groups of slide bar connecting blocks 406 are arranged, and the two groups of slide bar connecting blocks 406 are fixedly connected to the upper end of the fixed clamping plate 4; the two groups of guide slide bars 405 are arranged, the two groups of guide slide bars 405 are fixedly connected to the upper end of the movable clamp plate 402, and the two groups of guide slide bars 405 are respectively and slidably connected to the inner sides of the two groups of slide bar connecting blocks 406; the rear end of the closing spring 407 is fixedly connected to the rear end of the guide slide rod 405, and the front end of the closing spring 407 is fixedly connected to the rear end of the slide rod connecting block 406; in the use, under the guiding action of direction slide bar 405, movable clamp plate 402 is more stable when sliding back and forth, and when PE protection film stretching clamp was changed from film stretching detector and is torn down, fixed clamp plate 4 and movable clamp plate 402 keep closed state under the effect of closing spring 407, and then prevent that dust debris from entering between fixed clamp plate 4 and the movable clamp plate 402, make the inside cleanness that keeps of anchor clamps, promoted the convenience of anchor clamps management.

Wherein, fixed splint 4 still includes: compressing the link block 408; the compression connecting block 408 is of a U-shaped shell structure, and the compression connecting block 408 is fixedly connected to the middle part of the front end surface of the movable clamping plate 402; the pressing support plate 6 comprises: a compression bolt 601; the compression bolt 601 is in threaded connection with the middle part of the compression supporting plate 6, and the rear end of the compression bolt 601 is movably connected with the inner side of the compression connecting block 408; in the use, after PE protection film upper end is put into between fixed splint 4 and the movable splint 402, when rotating hold-down bolt 601, hold-down bolt 601 promotes movable splint 402 forward slip, and then fixed splint 4 and movable splint 402 press from both sides PE protection film tightly, when the anchor clamps of different width need be changed, pull out splint plug 301, fixed splint 4 down slides, compress tightly even piece 408 and hold-down bolt 601 separation, after the new anchor clamps of change, hold-down bolt 601 continues to use, has promoted the utilization ratio of hold-down bolt 601, has reduced the use quantity of clamp screw on the PE protection film anchor clamps, has simplified the anchor clamps structure.

Wherein, film fixed strip 5 includes: an active bead 501, an upper magnetic stripe 502 and a lower magnetic stripe 503; the upper end of the movable pressing bar 501 is hinged at the upper end of the film fixing bar 5; the upper magnetic stripe 502 is fixedly connected to the inner side of the movable pressing strip 501; the lower magnetic strip 503 is fixedly connected to the inner side of the film fixing strip 5; in the use, place the PE protection film sample both ends that will wait to detect respectively on the film fixed strip 5, close movable layering 501, go up magnetic stripe 502 and lower magnetic stripe 503 and adsorb together, film fixed strip 5 is fixed to the both ends of PE protection film sample, PE protection film sample exhibition flat operation is more convenient, insert film fixed strip 5 in the fixed splint 4, screw up hold-down bolt 601, and then PE protection film sample is fixed to the inboard of fixed splint 4, the fixed convenience of PE protection film sample has been promoted, when the tensile one end fracture of PE protection film sample is in the fixed splint 4 inboard, loosen hold-down bolt 601, take out film fixed strip 5, and then film fixed strip 5 drives cracked PE protection film and shifts out from fixed splint 4, and then the convenience of device use has been promoted.

Wherein, film fixed strip 5 still includes: a positioning bar 504; the positioning strip 504 is fixedly connected to the inner side of the film fixing strip 5; in the use, when PE protection film was placed on the film fixed strip 5, the upper and lower end edge of PE protection film sample was aligned with location strip 504, and then appears crookedly when preventing PE protection film sample from fixing, and the atress is more even when PE protection film sample was tensile, has promoted PE protection film and has detected the accuracy.

Wherein, film fixed strip 5 still includes: a fixing bar handle 505 and a handle stopper 506; the fixing strip handle 505 is fixedly connected to the left end of the film fixing strip 5; the handle stop block 506 is fixedly connected to the right end of the fixed bar handle 505; in the use, when film fixed strip 5 inserts fixed splint 4 inboard, handle dog 506 shelters from the left end at fixed splint 4 and plays limiting displacement, takes film fixed strip 5 out from fixed splint 4 through fixed strip handle 505 after the experiment, has promoted the convenience that film fixed strip 5 used.

Specific use and action of the embodiment:

the mounting handle 1 is inserted into the mounting seat of the film stretching detector, the mounting bolt 101 is inserted into the joint of the mounting handle 1 and the film stretching detector, and the PE protective film stretching clamp is fixed on the film stretching detector, so that the operation is simple and convenient; the clamping plate fixing block 401 is inserted into the inner side of the clamping plate connecting block 3, the clamping plate inserting block 301 is inserted to fix the upper end of the fixing clamping plate 4 to the inner side of the clamping plate connecting block 3, so that the fixing clamping plates 4 with different specifications can be replaced conveniently, and the convenience of using the device is improved; after the upper end of the fixed clamping plate 4 is fixed to the inner side of the clamping plate connecting block 3, an anti-falling plug 303 is inserted, so that the clamping plate plug 301 is fixed to the plug 302, the clamping plate plug 301 is prevented from loosening and falling off, and the use stability of the PE protective film stretching clamp is improved; the upper end of the PE protection film is placed between the fixed clamping plate 4 and the movable clamping plate 402, when the fixed clamping plate 4 is clamped, the fixed groove 403 and the fixed protrusion 404 are meshed together, and the PE protection film is fixed on the inner side of the fixed clamping plate 4 in a wave shape, so that the clamping effect of the fixed clamping plate 4 on the PE protection film is improved, and the PE protection film is prevented from falling off when being stretched; under the guiding action of the guiding slide bar 405, the movable clamping plate 402 is more stable when sliding forwards and backwards, when the PE protective film stretching clamp is replaced and detached from the film stretching detector, the fixed clamping plate 4 and the movable clamping plate 402 are kept in a closed state under the action of the closing spring 407, so that dust and sundries are prevented from entering between the fixed clamping plate 4 and the movable clamping plate 402, the inside of the clamp is kept clean, and the convenience of clamp management is improved; after the upper end of the PE protection film is put between the fixed clamping plate 4 and the movable clamping plate 402, when the compression bolt 601 is rotated, the compression bolt 601 pushes the movable clamping plate 402 to slide forwards, so that the fixed clamping plate 4 and the movable clamping plate 402 clamp the PE protection film, when clamps with different widths need to be replaced, the clamping plate insert 301 is pulled out, the fixed clamping plate 4 is slid downwards, the compression connecting block 408 is separated from the compression bolt 601, after a new clamp is replaced, the compression bolt 601 is continuously used, the utilization rate of the compression bolt 601 is improved, the use quantity of clamping screws on the PE protection film clamp is reduced, and the clamp structure is simplified; the two ends of the PE protection film sample to be detected are respectively placed on the film fixing strip 5, the movable pressing strip 501 is closed, the upper magnetic strip 502 and the lower magnetic strip 503 are adsorbed together, the film fixing strip 5 is fixed at the two ends of the PE protection film sample, the PE protection film sample flattening operation is more convenient, the film fixing strip 5 is inserted into the fixing clamping plate 4, the compression bolt 601 is screwed, the PE protection film sample is further fixed at the inner side of the fixing clamping plate 4, the convenience of PE protection film sample fixing is improved, when the PE protection film sample is stretched, one end of the PE protection film sample is broken at the inner side of the fixing clamping plate 4, the compression bolt 601 is loosened, the film fixing strip 5 is pulled out, and then the film fixing strip 5 drives the broken PE protection film to be removed from the fixing clamping plate 4, so that the convenience of device use is improved; when the PE protective film is placed on the film fixing strip 5, the edges of the upper end and the lower end of the PE protective film sample are aligned with the positioning strips 504, so that the PE protective film sample is prevented from being inclined when being fixed, the stress of the PE protective film sample is more uniform when being stretched, and the accuracy of PE protective film detection is improved; when the film fixing strip 5 is inserted into the inner side of the fixing clamp plate 4, the handle stop block 506 shields the left end of the fixing clamp plate 4 to play a limiting role, and after the experiment is finished, the film fixing strip 5 is pulled out of the fixing clamp plate 4 through the fixing strip handle 505, so that the convenience of using the film fixing strip 5 is improved.

The embodiments of the utility model have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the utility model in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, and to enable others of ordinary skill in the art to understand the utility model for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The utility model provides a PE protection film stretching clamp which characterized in that: comprising the following steps: the device comprises a mounting handle (1), a tension sensor (2), a clamping plate connecting block (3), a fixed clamping plate (4), a film fixing strip (5) and a compaction supporting plate (6); the upper end of the tension sensor (2) is fixedly connected to the lower end of the mounting handle (1), and the tension sensor (2) is electrically connected with the film stretching detector; the clamping plate connecting block (3) is fixedly connected to the lower end of the tension sensor (2); the upper end of the fixed clamping plate (4) is inserted into the inner side of the clamping plate connecting block (3); the film fixing strip (5) is inserted into the inner side of the upper end of the fixing splint (4); the upper end of the compaction supporting plate (6) is fixedly connected with the front end of the clamping plate connecting block (3).

2. The PE protective film stretching jig according to claim 1, wherein: the mounting handle (1) comprises: installing a bolt (101); the mounting bolt (101) is inserted into the upper end of the mounting handle (1).

3. The PE protective film stretching jig according to claim 1, wherein: the splint connecting block (3) comprises: a cleat insert (301); the clamping plate inserting block (301) is inserted in the middle of the clamping plate connecting block (3); the fixed splint (4) comprises: a cleat fixing block (401); the clamping plate fixing block (401) is fixedly connected to the upper end of the fixing clamping plate (4).

4. The PE protective film stretching jig according to claim 1, wherein: the splint connecting block (3) further comprises: a plug block (302) and an anti-falling plug (303); the bolt block (302) is fixedly connected to the lower end of the front side of the clamping plate connecting block (3); the anti-falling bolt (303) is inserted on the bolt block (302).

5. The PE protective film stretching jig according to claim 1, wherein: the fixed splint (4) further comprises: a movable clamping plate (402), a fixed groove (403) and a fixed protrusion (404); the upper end of the movable clamping plate (402) is connected with the upper end of the fixed clamping plate (4) in a sliding way; the fixing grooves (403) are provided with a plurality of groups, and the plurality of groups of fixing grooves (403) are uniformly formed on the inner side end surface of the fixing splint (4); the fixed bulges (404) are provided with a plurality of groups, and the fixed bulges (404) are uniformly and fixedly connected on the inner side end surface of the movable clamping plate (402).

6. The PE protective film stretching fixture as set forth in claim 5, wherein: the fixed splint (4) further comprises: a guide slide bar (405), a slide bar connecting block (406) and a closing spring (407); the two groups of slide bar connecting blocks (406) are arranged, and the two groups of slide bar connecting blocks (406) are fixedly connected to the upper end of the fixed clamping plate (4); the two groups of guide slide bars (405) are arranged, the two groups of guide slide bars (405) are fixedly connected to the upper end of the movable clamping plate (402), and the two groups of guide slide bars (405) are respectively and slidably connected to the inner sides of the two groups of slide bar connecting blocks (406); the rear end of the closing spring (407) is fixedly connected to the rear end of the guide sliding rod (405), and the front end of the closing spring (407) is fixedly connected to the rear end of the sliding rod connecting block (406).

7. The PE protective film stretching fixture as set forth in claim 5, wherein: the fixed splint (4) further comprises: a compression link (408); the compression connecting block (408) is of a U-shaped shell structure, and the compression connecting block (408) is fixedly connected to the middle part of the front end face of the movable clamping plate (402); the compaction supporting plate (6) comprises: a compression bolt (601); the compression bolt (601) is in threaded connection with the middle of the compression supporting plate (6), and the rear end of the compression bolt (601) is movably connected with the inner side of the compression connecting block (408).

8. The PE protective film stretching jig according to claim 1, wherein: the film fixing strip (5) comprises: a movable pressing strip (501), an upper magnetic strip (502) and a lower magnetic strip (503); the upper end of the movable pressing strip (501) is hinged to the upper end of the film fixing strip (5); the upper magnetic strip (502) is fixedly connected to the inner side of the movable pressing strip (501); the lower magnetic strip (503) is fixedly connected to the inner side of the film fixing strip (5).

9. The PE protective film stretching jig according to claim 1, wherein: the film fixing strip (5) further comprises: a locating bar (504); the positioning strip (504) is fixedly connected to the inner side of the film fixing strip (5).

10. The PE protective film stretching jig according to claim 1, wherein: the film fixing strip (5) further comprises: a fixing bar handle (505) and a handle stopper (506); the fixing strip handle (505) is fixedly connected to the left end of the film fixing strip (5); the handle stop block (506) is fixedly connected to the right end of the fixed bar handle (505).