CN111017614A - Film stretching device for plane film material - Google Patents
Film stretching device for plane film material Download PDFInfo
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- CN111017614A CN111017614A CN201911411444.3A CN201911411444A CN111017614A CN 111017614 A CN111017614 A CN 111017614A CN 201911411444 A CN201911411444 A CN 201911411444A CN 111017614 A CN111017614 A CN 111017614A
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- film
- membrane
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
- B65H23/022—Registering, tensioning, smoothing or guiding webs transversely by tentering devices
Abstract
The invention relates to a film spreading device for a planar film, which comprises a film spreading base, wherein a workbench is arranged on the film spreading base, film frame plates are arranged around the workbench, the film spreading device also comprises a flexible rod, a plurality of film pulling assemblies are arranged on the film spreading base and correspond to each side edge of the film frame plates, each film pulling assembly comprises a tension sensor, a turnbuckle and a clamping plate assembly, and the lower end of the tension sensor is fixedly connected with the base; the splint subassembly includes that two snap-fits enclose the cardboard, has seted up logical groove on the cardboard, and the logical groove snap-fit of two cardboards constitutes the type groove structure of falling T, and the splint subassembly is still including the retaining member of connecting two cardboards, and the membrane material atress of guaranteeing intermediate position department is big a little, and the atress of both sides is little, guarantees that the elongation of each position department is unanimous.
Description
Technical Field
The invention relates to a film spreading device for a planar film material.
Background
At present, the planar membrane material structure is less on the building, and the membrane mode of opening of planar membrane material is less, and the mode of mainly adopting is for passing through the bolt fastening with the membrane material frame on the frame, then cover the membrane material on the frame, uses the pressure membrane board to compress tightly each limit of membrane material to use the taut pressure membrane board of pneumatic cylinder, make each limit of membrane material receive certain pulling force, thereby reach the purpose of opening the membrane.
For example, a rectangular unit film-stretching device is disclosed in the chinese patent application with publication No. CN 109230725A. The device comprises a base, a film stretching support frame, a hydraulic cylinder, a long film stretching plate, an arc-shaped film stretching plate, an edge rod positioning pin assembly, a corner auxiliary support assembly, a turnbuckle and the like. The working principle of the device is that a side rod positioning pin assembly is inserted into a hole in a rectangular frame on a film-stretching supporting frame in a rectangular frame anti-theft film-stretching device to achieve the purpose of positioning the rectangular frame, an adjusting nut on the side rod positioning pin assembly is adjusted to level a side rod, and the nut is screwed to fix the side rod positioning pin assembly. The corner auxiliary supporting assemblies of the four corners are adjusted to enable the supporting seat to be in contact with the rectangular frame, and the corners of the rectangular frame are guaranteed not to deform when the film is stretched. And then, the membrane material is laid on a rectangular frame, a long pull template is used for clamping the middle of the membrane material, an arc pull template is used for clamping the corners of the membrane material, a U-shaped hanging ring is used for connecting a hydraulic cylinder and a long wax mold, the hydraulic cylinder works, the tension of the hydraulic cylinder is adjusted by adjusting the pressure of the hydraulic cylinder, and after the hydraulic cylinder is pulled to be close to the membrane material, the corner tension of the membrane material is adjusted through a turnbuckle to eliminate the corner wrinkles.
The above-mentioned device has the following problems in the actual use: because each side of the membrane material is tensioned by using one hydraulic cylinder, the elongation at different positions of each side of the membrane material is the same, the elongation at different positions of the edge of the membrane material under the same tension is different, the middle of the membrane material is long, the two sides of the membrane material are short, the middle of the membrane material is stressed slightly, the two sides of the membrane material are stressed slightly under the condition that the elongation at different positions of each side of the membrane material is consistent, and the local position of the membrane material after membrane stretching is wrinkled. And because the pretension is inhomogeneous when opening the membrane, and each limit of membrane material uses the press mold board to compress tightly the membrane material, and the too big direct fracturing membrane material of press mold board pressure can, for preventing that the position that the membrane material atress is big from taking place to tear, therefore membrane material pretension can not reach the pretension of design, though the membrane material is level and smooth when opening the membrane but under the creep effect, the membrane material can take place not hard up phenomenon, finally can lead to the membrane material to take place the secondary fold phenomenon. In addition, in the film-stretching device, the film frame needs to be fixed to the film-stretching device by bolts when stretching the film, and the number of bolts is large, so that the film-stretching device is troublesome to detach and mount. In addition, in the process of clamping the middle of the membrane material by the long drawing template, the long drawing template needs to be clamped by screwing the bolts in each arrangement in the length direction, and after the membrane is stretched, the membrane material can be taken out only by detaching the bolts, so that the operation is complex.
Disclosure of Invention
The invention aims to provide a film stretching device for a planar film material, which aims to solve the problem that the local position of the film material is wrinkled after film stretching due to the consistent elongation of different positions of the film material in the prior art.
In order to solve the problems, the technical scheme adopted by the film tensioning device for the planar film material is as follows:
the film stretching device for the planar film material comprises a film stretching base, a workbench is supported on the film stretching base through a film stretching support frame, film material frame plates are arranged on the periphery of the workbench, the film material frame plates are of a rectangular structure and are horizontally arranged to be used for placing the film material to be stretched, the film stretching device further comprises flexible rods inserted into edge holes in the edges of the film material, a plurality of film stretching assemblies are arranged on the film stretching base and correspond to the side edges of the film material frame plates, the film stretching assemblies are arranged side by side at intervals along the corresponding side edges of the film material frame plates, each film stretching assembly comprises a tension sensor, a turnbuckle and a clamping plate assembly which are connected in sequence, and the lower end of the tension sensor is fixedly connected with the base; the splint subassembly includes the cardboard that two butt joints enclosed, sets up the logical groove of horizontal extension on the cardboard, and the logical groove butt joint of two cardboards constitutes the logical groove that the T type groove structure penetrated with the flexible rod, and the splint subassembly is still including connecting two cardboards with the retaining member that reduces the vertical deviating from with spacing flexible rod with the interval between two cardboards after the flexible rod penetrates the T type groove.
Furthermore, the membrane material frame plate comprises four long plates which are enclosed into a rectangular frame structure, and further comprises a connecting piece for connecting the two adjacent long plates, and an adjusting structure for adjusting the distance between each long plate and the corresponding long plate is connected between the workbench and each long plate.
Further, adjust the structure and include a plurality of bracing pieces of connecting respectively on each side of workstation and outside extension, still include the limit pole subassembly of being connected with the bracing piece, limit pole subassembly is including being used for with the parallel and relatively fixed limit pole of long board that corresponds, still including the connecting rod of connection between limit pole and bracing piece, the connecting rod with the bracing piece is along parallel arrangement, and the two is flexible in order to realize the regulation of interval between long board and the workstation relatively along the axial.
Furthermore, the support rod is provided with a long hole extending along the axial direction of the support rod, and the connecting rod is connected with an adjusting bolt and a nut which extend perpendicular to the axial direction of the connecting rod and are inserted into the long hole.
Furthermore, the side rod is inserted with a positioning pin which is inserted into a positioning hole of the corresponding long plate to enable the long plate and the side rod to be positioned relatively, the positioning pin is of a T-shaped structure and is provided with a small-diameter section and a large-diameter section, the small-diameter section is inserted into the positioning hole, the large-diameter section is in blocking fit with the inner side face of the long plate, the long rod is also connected with a baffle plate which is used for blocking the rear side of the positioning pin, and a locking screw which is used for abutting the positioning pin on the long plate is arranged on the baffle plate in a penetrating mode.
Furthermore, a cushion block is clamped between the locking screw and the positioning pin, and the thickness of the cushion block is larger than the length of the positioning pin.
Furthermore, a corner supporting column for supporting the connecting piece of the membrane frame plate is movably arranged at the position, corresponding to the connecting piece, on the membrane base.
Furthermore, the clamping plate assembly is connected with the turn buckle through a U-shaped pull ring, and two sides of the U-shaped pull ring are respectively connected to the corresponding clamping plates.
The invention has the following beneficial effects: compared with the prior art, the film tensioning device for the planar film material, disclosed by the invention, has the advantages that in the actual use process of I, a film material frame plate is connected on a workbench, then a film material to be tensioned is laid on the workbench, the corresponding edge of the film material is erected on the outer side of the film material frame plate, the flexible rod is penetrated into the through hole on the corresponding edge of the film material, the clamping plate assembly is sleeved on the outer side of the flexible rod, the flexible rod is penetrated into the through groove, the clamping plate assembly is clamped through the locking piece, so that the film material is ensured not to vertically fall off from the clamping plate assembly, the basket bolt is pre-retracted through the basket bolt, the basket bolt is adjusted to pull the film material, the reading of the corresponding tension sensor is adjusted, the reading of each tension sensor reaches the required value, namely the requirement that the middle value is large and the values on the two sides are small, and the tensioning of the planar film material frame plate can be completed when the readings of all the tension sensors, and fixing the membrane material on the membrane material frame plate. This mode is at the actual membrane in-process of opening, because each position department of membrane material same side all has the membrane module of drawing, the pulling force of the membrane module of drawing of different positions department all can adjust according to the numerical value of reality to guarantee that the membrane material atress of intermediate position department is big a little, the atress of both sides is little, guarantees that the elongation of each position department is unanimous, just so can avoid opening the phenomenon that the fold appears in the local position behind the membrane.
Further, set up the flexible rod and wear to adorn in the through-hole of the side of membrane material to through the centre gripping of splint subassembly, can guarantee that the atress of membrane material is stable under the tight circumstances of clamp is not carried out to the membrane material, the membrane material can not be followed and loosened between the splint subassembly, when dismantling, directly take out the flexible rod, take off the membrane material can, it is more convenient to operate.
Drawings
In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings needed to be used in the embodiment will be briefly described as follows:
FIG. 1 is a schematic structural diagram of a device for spreading a planar film material according to an embodiment of the present invention in an assembled state with a film to be spread;
FIG. 2 is a schematic structural diagram of the film stretching device in FIG. 1;
FIG. 3 is a schematic structural view of the side bar assembly of FIG. 2;
FIG. 4 is a schematic structural diagram of the film drawing assembly of FIG. 1;
FIG. 5 is a schematic structural view of the cleat assembly of FIG. 4;
description of reference numerals: 1-a membrane base; 2-a membrane support frame; 3-a workbench; 4-a membrane frame plate; 5-long plate; 6-supporting rods; 7-a side bar assembly; 8-side bar; 9-a connecting rod; 10-adjusting the bolt; 11-a locating pin; 12-cushion blocks; 13-locking screws; 14-a flexible rod; 15-long holes; 16-a tension sensor; 17-turnbuckle; 18-a cleat assembly; 19-U-shaped pull rings; 20-eye bolts; 21-cardboard; 22-a through slot; 23-corner support posts; 24-a baffle; 25-corner connecting blocks; 26-locking member.
Detailed Description
In order to make the technical purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention are further described below with reference to the accompanying drawings and specific embodiments.
As shown in the figure, the film tensioning device for a planar film material includes a film tensioning base 1, in this embodiment, the film tensioning base 1 is a basic carrier of all other components, and the structure thereof is a rectangular plate structure, of course, in other embodiments, the specific structure thereof is not limited, and those skilled in the art can design arbitrarily according to actual needs.
Open and to have workstation 3 through a membrane support frame 2 support on the membrane base 1, a membrane support frame 2 includes four stands, it is concrete, the through-hole that the confession bolt that link up about the mounted position department that corresponds the stand on a membrane base 1 is provided with wears to adorn, four stands pass through the fix with screw on a membrane base 1, the upper end of four stands is connected with the flat board, the flat board has constituted workstation 3, be equipped with membrane material frame plate 4 around workstation 3, membrane material frame plate 4 is rectangular structure and horizontal arrangement in order to be used for placing the membrane material of treating a membrane.
In addition, for the membrane material frame plate 4, the membrane material frame plate 4 comprises four long plates 5 which enclose into a rectangular frame structure, and further comprises a connecting piece for connecting the two adjacent long plates 5, and an adjusting structure for adjusting the distance between each long plate 5 and the corresponding workbench 3 is connected between the workbench 3 and each long plate 5. In the embodiment, the connecting member is a corner connecting block 25 with an L-shaped structure, two sides of the corner connecting block 25 are fixedly connected with the corresponding long plates 5 respectively, and in other embodiments, the connecting member may be a bolt for detachably connecting two long plates 5. The length and width of the rectangular frame formed by surrounding the film material frame plate 4 can be realized by adjusting the structure, and the film drawing device can be adapted to the film materials with different sizes, so that the device has certain universality. In other embodiments, the membrane frame plate 4 and the worktable 3 may be directly and fixedly connected without adjustment.
Specifically, to the setting of adjusting the structure, adjust the structure and include a plurality of bracing pieces 6 of connecting respectively on workstation 3 and to outside extension all around, still include the limit pole subassembly 7 of being connected with bracing piece 6, limit pole subassembly 7 is including being used for with the parallel and relatively fixed limit pole 8 of the long slab 5 that corresponds, still including connecting the connecting rod 9 between limit pole 8 and bracing piece 6, connecting rod 9 and bracing piece 6 are along parallel arrangement, and the two is relative flexible in order to realize the regulation of interval between long slab 5 and the workstation 3 along the axial. Specifically, the support rod 6 is provided with a long hole 15 extending along the axial direction thereof, and the connecting rod 9 is connected with an adjusting bolt 10 and a nut which extend perpendicularly to the axial direction thereof and are inserted into the long hole 15. Foretell side bar 8 and the long board 5 parallel arrangement who corresponds, the equal perpendicular to side bar 8 setting of corresponding connecting rod 9 and bracing piece 6, and connecting rod 9 has four, bracing piece 6 that corresponds also can have four, slot hole 15 has been seted up to its axial of perpendicular to on bracing piece 6, slot hole 15 extends along its axial, it is provided with the perforation on bracing piece 6 to correspond, wear the dress through adjusting bolt 10 and nut and realize being connected between connecting rod 9 and the bracing piece 6, finally realize side bar subassembly 7 and workstation 3's relative connection, and simultaneously, before drawing the membrane, can be according to the size of membrane material, the relative hookup location of corresponding regulation bracing piece 6 and connecting rod 9, and then the adjustment and this flexible length, the membrane material size that corresponds with the adaptation. The film of the film material frame plate 4 with various sizes can be realized.
Of course, in other embodiments, the adjusting structure may also be implemented by directly using a structure in which the telescopic rod is connected between the workbench 3 and the long plate 5, and the telescopic length of the telescopic rod is fixed by the locking screw, so as to implement the distance adjustment between the two. In other embodiments, the connection rod 9 may be provided with a long hole 15, or both the connection rod and the connection rod 9 may be provided with the long holes 15, or the connection rod and the connection rod may not be provided with the long holes 15, and the support rod 6 and the connection rod 9 may be directly clamped by a clamp to achieve relative fixation after position adjustment of the two.
In addition, the side rod 8 is inserted with a positioning pin 11 for inserting into a positioning hole of the corresponding long plate 5 to relatively position the long plate 5 and the side rod 8, the positioning pin 11 is of a T-shaped structure and has a small diameter section and a large diameter section, the small diameter section is inserted into the positioning hole, the large diameter section is in stop fit with the inner side surface of the long plate 5, the long rod is further connected with a baffle plate 24 for stopping the positioning pin 11 at the rear side, and a locking screw 13 for abutting the positioning pin 11 on the long plate 5 is arranged on the baffle plate 24 in a penetrating manner. A cushion block 12 is clamped between the locking screw 13 and the positioning pin 11, and the thickness of the cushion block 12 is larger than the length of the positioning pin 11. Can realize like this that long board 5 and side bar 8's position relative positioning, moreover because the size all around of membrane material framed panel 4 has been fixed, consequently, setting up of locating pin 11 and locking screw 13 can guarantee that side bar 8 is parallel and under the fixed prerequisite of size with long board 5 position, has guaranteed to be connected between side bar 8 and the long board 5. Of course, in other embodiments, the side bar 8 and the long plate 5 may be fixedly connected by bolts. The purpose of arranging the cushion block 12 is to unscrew the locking screw 13 only in order to disassemble, and the thickness of the cushion block 12 is larger than the length of the positioning pin 11, so that the positioning pin 11 can be quickly removed after the cushion block 12 is removed, the time for disassembling the membrane material frame plate 4 is saved, and the efficiency is improved. In other embodiments, however, the spacer 12 may not be provided.
In addition, the film spreading device further includes a flexible rod 14 for inserting into the edge hole at the edge of the film material, in this embodiment, the flexible rod 14 is a steel wire, and of course, in other embodiments, the flexible rod 14 may also be made of rubber material or hemp rope material, and the like, which is not limited in particular. Each side that corresponds membrane frame plate 4 on the base all is equipped with eight to nine and draws the membrane module, and each draws the membrane module to arrange side by side along the corresponding side interval of membrane frame plate 4.
When the installation, bracing piece 6 passes through the bolt fastening on workstation 3, through adjusting bolt 10, the nut is connected connecting rod 9 in the side bar subassembly 7 on bracing piece 6, keep adjusting bolt 10, the not hard up of nut, pass through corner connecting block 25 fixed connection with four corner holes of membrane material framed panel 4, insert locating pin 11 in the side bar subassembly 7 to between side bar 8 and rectangular board 5, put into between locating pin 11 and the locking screw 13 with cushion 12, and tighten locking screw 13, adjusting bolt 10 with 8 pastes tight rectangular board 5 on the side bar can.
For the film pulling assembly, the film pulling assembly comprises a tension sensor 16, a turn buckle 17 and a clamping plate assembly 18 which are connected in sequence, in the embodiment, the turn buckle 17 and the tension sensor 16 are connected with each other, and the lower end of the tension sensor is fixedly connected with the base; the clamping plate assembly 18 comprises two clamping plates 21 which are buckled and enclosed, a through groove 22 which extends transversely is formed in each clamping plate 21, the through grooves 22 of the two clamping plates 21 are buckled to form an inverted T-shaped groove structure, the through groove 22 is penetrated by the flexible rod 14, the clamping plate assembly 18 further comprises a locking member 26 which is used for connecting the two clamping plates 21 so as to reduce the distance between the two clamping plates 21 after the flexible rod 14 penetrates into the inverted T-shaped groove and limit the flexible rod 14 to be vertically separated, and in the embodiment, the locking member 26 is a bolt; in other embodiments, the locking member 26 may be a snap.
Further, the clamping plate assembly 18 is connected with the turn buckle 17 through a U-shaped pull ring 19, and two sides of the U-shaped pull ring 19 are respectively connected to the corresponding clamping plates 21.
Specifically, a plurality of eyebolts 20 are screwed on the stretch film base 1, and a U-shaped pull ring 19, a tension sensor 16, a turn buckle 17, the U-shaped pull ring 19 and a clamping plate assembly 18 are sequentially connected to the eyebolts 20.
When the membrane is stretched, the membrane frame plate 4 is connected on the workbench 3, then the membrane to be stretched is laid on the workbench 3, the corresponding edge of the membrane is erected outside the membrane frame plate 4, the flexible rod 14 is inserted into the through hole on the corresponding edge of the membrane, then the clamping plate assembly 18 is sleeved outside the flexible rod 14, the flexible rod 14 is penetrated in the through groove 22, the clamping plate assembly 18 is clamped through the locking piece 26, thereby ensuring that the membrane material can not vertically deviate from the clamping plate assembly 18, pre-tightening the basket bolts 17, then adjusting the basket bolts 17, pulling the membrane material, adjusting the reading of the corresponding tension sensor 16, leading the reading of each tension sensor 16 to reach the required value, namely the requirement of large middle value and small values at two sides, when the readings of all the tension sensors 16 can reach the specified readings, the film of the planar film frame plate 4 is finished, and the film is fixed on the film frame plate 4. This mode is at the actual membrane in-process of opening, because each position department of membrane material same side all has the membrane module of drawing, the pulling force of the membrane module of drawing of different positions department all can adjust according to the numerical value of reality to guarantee that the membrane material atress of intermediate position department is big a little, the atress of both sides is little, guarantees that the elongation of each position department is unanimous, just so can avoid opening the phenomenon that the fold appears in the local position behind the membrane.
Further, set up flexible rod 14 and wear to adorn in the through-hole of the side of membrane material to through the centre gripping of splint subassembly 18, can guarantee that the atress of membrane material is stable under the tight condition of clamp is not carried out to the membrane material, the membrane material can not come loose from between the splint subassembly 18, when dismantling, directly take flexible rod 14 out, take off the membrane material can, the operation is more convenient.
And in addition, a corner supporting column 23 for supporting the connecting piece of the membrane material frame plate 4 is movably arranged at the position corresponding to the connecting piece on the base. The lower extreme of this corner support post 23 supports establishes on the base, and the upper end is provided with the double-screw bolt, and the cover is equipped with the nut on the double-screw bolt, and foretell corner connecting block 25 cover is established on the double-screw bolt, realizes the support to the corner position department of membrane material frame, simultaneously, can adjust the local height of membrane material frame through setting up of nut, avoids 4 corners atress deformations of membrane material framed panel when opening the membrane. Meanwhile, the corner supporting columns 23 are movably arranged on the base, and when the size of the corresponding film material frame needs to be adjusted, the supporting positions of the corner supporting columns 23 can be directly moved.
While in other embodiments, the corner support posts 23 may not be provided; the cleat assembly 18 and the flower basket bolt may be directly bolted together.
Finally, it should be noted that: the above embodiments are merely illustrative and not restrictive of the technical solutions of the present invention, and any equivalent substitutions and modifications or partial substitutions made without departing from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.
Claims (8)
1. The film stretching device for the planar film comprises a film stretching base, wherein a workbench is supported on the film stretching base through a film stretching support frame, film frame plates are arranged around the workbench, the film frame plates are of a rectangular structure and are horizontally arranged for placing the film to be stretched, the film stretching device is characterized by further comprising flexible rods inserted into side holes in the edges of the film, a plurality of film stretching assemblies are arranged on the film stretching base and correspond to the side edges of the film frame plates, the film stretching assemblies are arranged side by side at intervals along the corresponding side edges of the film frame plates and comprise tension sensors, turnbuckles and clamping plate assemblies which are connected in sequence, and the lower ends of the tension sensors are connected with the base; the splint subassembly includes the cardboard that two butt joints enclosed, sets up the logical groove of horizontal extension on the cardboard, and the logical groove butt joint of two cardboards constitutes the logical groove that the T type groove structure that falls penetrated with the flexible rod, and the splint subassembly is still including connecting two cardboards with the retaining member that reduces the vertical deviating from with spacing flexible rod with the interval between two cardboards after the flexible rod penetrates the T type groove.
2. A planar film spreading device as claimed in claim 1, wherein the film frame plate comprises four long plates surrounding a rectangular frame structure, and further comprises a connecting member for connecting two adjacent long plates, and an adjusting structure for adjusting the distance between each long plate and the workbench is connected between the workbench and each long plate.
3. The device for spreading the flat membrane according to claim 2, wherein the adjusting structure comprises a plurality of support rods respectively connected to each side of the worktable and extending outward, and further comprises a side rod assembly connected to the support rods, the side rod assembly comprises a side rod for being parallel to and fixed relative to the corresponding long plate, and a connecting rod connected between the side rod and the support rods, the connecting rod and the support rods are arranged in parallel and axially and relatively extend and retract to adjust the distance between the long plate and the worktable.
4. The apparatus for spreading a flat film according to claim 3, wherein the support rod is provided with a long hole extending along an axial direction thereof, and the connecting rod is connected with an adjusting bolt and a nut extending perpendicular to the axial direction thereof and inserted into the long hole.
5. The film spreading device for the planar film as claimed in claim 3, wherein the side bar is inserted with a positioning pin inserted into the positioning hole of the corresponding long plate to position the long plate and the side bar relative to each other, the positioning pin is of a T-shaped structure and has a small diameter section and a large diameter section, the small diameter section is inserted into the positioning hole, the large diameter section is in stop fit with the inner side surface of the long plate, the long plate is further connected with a baffle plate for stopping the rear side of the positioning pin, and the baffle plate is penetrated with a locking screw for abutting the positioning pin against the long plate.
6. The device for spreading the flat membrane material as claimed in claim 5, wherein a cushion block is clamped between the locking screw and the positioning pin, and the thickness of the cushion block is greater than the length of the positioning pin.
7. A planar membrane device as claimed in any one of claims 2 to 6, wherein corner supporting columns for supporting the connecting pieces of the membrane frame plate are movably arranged on the membrane base at positions corresponding to the connecting pieces.
8. A planar membrane tensioning device according to any one of claims 1 to 6, wherein the clamping plate assembly is connected with the turn-buckle through a U-shaped pull ring, and two sides of the U-shaped pull ring are respectively connected with the corresponding clamping plates.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911411444.3A CN111017614A (en) | 2019-12-31 | 2019-12-31 | Film stretching device for plane film material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911411444.3A CN111017614A (en) | 2019-12-31 | 2019-12-31 | Film stretching device for plane film material |
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| CN111017614A true CN111017614A (en) | 2020-04-17 |
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