Unwinding mechanism and material cutting frame

Abstract

The utility model discloses an unwinding mechanism and a material cutting frame. The unwinding mechanism comprises a winding drum inner supporting mechanism, a center shaft rod and a support structure. The winding drum inner supporting mechanism is provided with shaft sleeves, connecting rods and supporting cross beams, the shaft sleeves are used for being arranged on the central shaft rod in a sleeving mode and connected with the central shaft rod in a locking mode through first fasteners, each shaft sleeve is connected with the corresponding supporting cross beam through the corresponding connecting rod, and the two ends of each connecting rod are hinged to the corresponding shaft sleeve and the corresponding supporting cross beam. The supporting cross beams are evenly distributed on the peripheral side of the center shaft rod and are parallel to the center shaft rod, and each supporting cross beam comprises a supporting cross beam body, a plurality of ball head sliding blocks, a left sliding plug and a right sliding plug. According to the winding drum inner supporting mechanism, the radial size is adjustable, the winding drum inner supporting mechanism can adapt to the change of the specification of the winding drum, the use mode is flexible, and compared with an existing design of driving and locking through a lead screw, the winding drum inner supporting mechanism is more stable in supporting structure and lower in implementation cost through a new design concept.

Description

TECHNICAL FIELD

[0001] The utility model relates to a processing device, concretely is a material cutting frame and unwinding mechanism. BACKGROUND

[0002] The evaporation mask plate (CMM, Common Metal Mask) used in the semiconductor industry is usually composed of a frame and a tension mask (Mask Sheet) fixed in the frame, wherein part of the tension mask can be processed from a metal sheet material by etching process. The material used for the tension mask of the evaporation mask plate is very thin, and during storage and transportation, it is usually in a rolled state, and is cut by unwinding during use. For the unwinding of the material roll, the traditional operation method is generally to limit the roll of the material roll with a shaft rod structure, and then pull out the material from one side of the material roll for subsequent operation. In order to maintain the stability of the material roll, the shaft rod structure needs to match the inner diameter of the roll, so that the material roll does not shake during unwinding. However, for different specifications of the material roll, or different manufacturers and different batches of the material roll, the length and inner diameter of the roll may change, and a limited number of fixed size shaft rods are generally difficult to cope with such situations.

[0003] In some existing automated production equipment in different fields, in order to realize automatic loading and unloading of the material roll, a support structure that can adapt to the diameter of the roll is provided, but the equipment generally needs to be equipped with driving devices such as hydraulic cylinders, as well as complex transmission mechanisms and support structures, etc. For example, the patent document with the publication number CN 206407755 U provides a kind of metal coil unwinding frame. In addition, there is also a kind of design that uses a lead screw to automatically or manually drive the expansion and contraction of the roll support structure, but the vibration generated during the use of this kind of equipment can easily cause wear and damage to the lead screw, thereby affecting the supporting force of the material roll. UTILITY MODEL CONTENT

[0004] The technical purpose of the utility model is to design a material cutting frame and unwinding mechanism that can be used for cutting and processing of roll material, and is convenient for manual operation.

[0005] To achieve the above purpose, the technical scheme provided by the utility model is:

[0006] An unwinding mechanism, comprising a roll inner support mechanism, a center shaft and a support structure for lifting the center shaft, characterized in that:

[0007] The roll inner support mechanism comprises a plurality of shaft sleeves, connecting rods and support beams;

[0008] The plurality of shaft sleeves are sequentially sleeved on the central shaft rod and are respectively locked and connected with the central shaft rod by first fasteners, each shaft sleeve is respectively connected with each support beam by a connecting rod, and two ends of each connecting rod are connected with the corresponding shaft sleeve and support beam in a hinged manner;

[0009] The plurality of support beams are uniformly distributed around the central shaft rod and are parallel to the central shaft rod; each support beam is provided with a support beam body, a plurality of ball head sliders, and left and right two sliding plugs; the support beam body is provided with a sliding groove guide rail extending in the axial direction, the plurality of ball head sliders and the left and right two sliding plugs are installed in the sliding groove guide rail and are in sliding connection with the support beam body, and the ball head sliders are arranged between the left and right two sliding plugs; a spherical surface structure protruding from the support beam body is arranged on the top of the ball head slider and is used for abutting against the inner wall of the winding drum; the sliding plug is provided with a baffle for blocking the winding drum from the side.

[0010] Based on the above-mentioned scheme, the improved scheme further comprises:

[0011] As a preferred embodiment, the support beam body comprises two oppositely arranged parallel support plates, a space is left between the two parallel support plates to form the sliding groove guide rail, and the sliding groove guide rail comprises a first sliding groove and a second sliding groove, wherein the first sliding groove is located at the top of the support beam body and has a width smaller than that of the second sliding groove; the second sliding groove is located at one side of the support beam body close to the shaft sleeve, the top of the second sliding groove is in communication with the first sliding groove, and the width of the second sliding groove is adapted to the thickness of the connecting rod; one end of the corresponding connecting rod extends into the second sliding groove and is connected with the two parallel support plates through a hinge shaft.

[0012] As a preferred embodiment, the ball head slider is composed of a ball head screw and a first nut screwed on the ball head screw, the spherical surface structure of the ball head screw is located on the outside of the support beam body, the first nut is arranged in the second sliding groove, and the outer diameter of the first nut is larger than the width of the first sliding groove and smaller than the width of the second sliding groove.

[0013] As a preferred embodiment, the sliding plug is provided with a backing plate, a baffle, and a second fastener, the backing plate is laid on the support beam body, the baffle is vertically erected at one side edge of the top surface of the backing plate and is fixedly connected with the backing plate; the second fastener comprises a second locking bolt and a second nut, a hole through which the second locking bolt passes is formed in the backing plate, the head of the second locking bolt is located in the second sliding groove, the tail of the second locking bolt passes through the first sliding groove and the backing plate and is threadedly connected with the second nut, the head of the second locking bolt is larger than the width of the first sliding groove, and the outer diameter of the second nut is larger than the hole diameter of the hole.

[0014] As a preferred implementation, the head of the second set screw is polygonal, with its side abutting the inner wall of the second sliding groove, and no rotational freedom of movement.

[0015] As a preferred implementation, the bottom surface of the backing plate is provided with a transversely extending clamping groove, the width of the clamping groove is adapted to the overall width of the support beam body, and the sliding plug is clamped on the support beam body through the clamping groove.

[0016] As a preferred implementation, the shaft sleeve comprises a central sleeve and a plurality of articulated supports arranged on the outer wall of the central sleeve, the plurality of articulated supports correspond to the support beams one by one and are uniformly distributed on the circumferential side of the central sleeve; the first fastener is a first set screw, and a set screw hole adapted to the first set screw is arranged on the central sleeve between adjacent articulated supports, and the set screw holes on each shaft sleeve are axially aligned; the set screw hole is a through-hole threaded hole, the inner side of which is in communication with the barrel cavity of the central sleeve, and the axis thereof is consistent with the radial direction of the central sleeve.

[0017] As a preferred implementation, the two groups of connecting rods connected with the two outermost shaft sleeves are inclined in opposite directions relative to the central shaft.

[0018] As a preferred implementation, the support structure comprises a base and two steel pipe columns vertically erected in the middle of the base, each steel pipe column is provided with a row of U-shaped clamping grooves on its front side and rear side, and each U-shaped clamping groove located on the front side is staggered in the height direction with each U-shaped clamping groove located on the rear side, and the U-shaped clamping grooves on the front side and the rear side are alternately lowered or raised in the vertical direction; the upper part of the U-shaped clamping groove is in communication with the outside through a cutout, the cutout is the inlet of the central shaft, and the lower part is a circular arc-shaped groove with an upward opening; the U-shaped clamping grooves at different height positions on the two steel pipe columns correspond one by one, and the two ends of the central shaft are lifted via the U-shaped clamping grooves at the same height on the left and right two steel pipe columns.

[0019] A material cutting frame, characterized by comprising a cutting operation table and a pay-off mechanism as described above, and the support structure is a floor support arranged on one side of the cutting operation table or a table support fixedly installed on one side of the cutting operation table. Advantages

[0020] The pay-off mechanism and the material cutting frame provided by the utility model have the roll inner support mechanism with adjustable structure, can adapt to the changes of the roll inner diameter and length and other parameters, can keep the rolls of different sizes and specifications stable during being pulled or cut, and are more flexible in use compared with the traditional shaft positioning.

[0021] The utility model discloses need not configure complex transmission and drive equipment etc., and the implementation cost is low, can satisfy the demand of the processing scene of not having the condition of implementing automatic control processing and other needs manual operation, and compared with the design conception of adopting screw rod mechanism drive, for fastener, the utility model can select from more stable and / or use and lower cost of wearing and tearing accessory, such as fastening bolt etc., improve the support structure stability, reduce the implementation cost, and the utility model discloses need not configure complex transmission and drive equipment etc., and the implementation cost is low, can satisfy the demand of the processing scene of not having the condition of implementing automatic control processing and other needs manual operation, and compared with the design conception of adopting screw rod mechanism drive, for fastener, the utility model can select from more stable and / or use and lower cost of wearing and tearing accessory, such as fastening bolt etc., improve the support structure stability, reduce the implementation cost, and the utility model discloses need not configure complex transmission and drive equipment etc., and the implementation cost is low, can satisfy the demand of the processing scene of not having the condition of implementing automatic control processing and other needs manual operation, and compared with the design conception of adopting screw rod mechanism drive, for fastener, the utility model can select from more stable and / or use and lower cost of wearing and tearing accessory, such as fastening bolt etc., improve the support structure stability, reduce the implementation cost,

[0022] Without using automatic or semi-automatic control equipment such as screw rod, the utility model provides new design conception, makes support crossbeam outward expansion to be in place, and reel and support structure can still produce axial relative movement smoothly, for different inner diameter or length reel, through adjusting the relative position of both, can conveniently implement the installation of fastener on different positions of central shaft, avoids the installation fastener of smaller inner diameter or longer reel due to the size factor.

[0023] Other additional aspects and advantages of the utility model will be partly given in the following description, some will become obvious from the following description, or can be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the three-dimensional structure diagram of reel inner support mechanism in a specific embodiment of the utility model,

[0025] Figure 2 It is the front view of reel inner support mechanism in a specific embodiment of the utility model,

[0026] Figure 3 It is the plan view of reel inner support mechanism in a specific embodiment of the utility model,

[0027] Figure 4 It is the side view of reel inner support mechanism in a specific embodiment of the utility model,

[0028] Figure 5 It is the three-dimensional structure diagram of material cutting frame in a specific embodiment of the utility model,

[0029] Figure 6 It is the front view of material cutting frame in a specific embodiment of the utility model,

[0030] Figure 7 It is the side view of material cutting frame in a specific embodiment of the utility model,

[0031] Figure 8 It is the plan view of material cutting frame in a specific embodiment of the utility model,

[0032] Figure 9 It is the schematic diagram of ball head screw rod in a specific embodiment,

[0033] Figure 10 is a sectional view of the support beam body;

[0034] Figure 11 is a structural schematic view of the sliding plug. DETAILED DESCRIPTION

[0035] In order to make the design scheme and working principle of the utility model more clear, the utility model will be explained and described in more detail below in combination with the drawings and specific embodiments. Embodiment 1

[0036] As Figures 1 to 4 shown in a kind of unwinding mechanism, including reel inner support mechanism 1, central shaft 2 and the support structure 3 of lifting central shaft composition part.

[0037] The reel inner support mechanism 1 includes three shaft sleeves 1-1, three support beams 1-3 attached to each shaft sleeve 1-1 by connecting rod 1-2, and first fastener for locking the relative position of shaft sleeve 1-1 and central shaft 2.

[0038] The shaft sleeve 1-1 includes a central sleeve and three hinged supports provided on the outer wall of the central sleeve. The inner diameter of the central sleeve matches the diameter of the central shaft 2, so that the shaft sleeve 1-1 can move laterally when it is sleeved on the central shaft 2, and there is no shaking in the circumferential direction. Each hinged support corresponds to a support beam 1-3 and is evenly distributed on the circumferential side of the central sleeve. One end of each connecting rod 1-2 is hinged to the corresponding support beam 1-3 by a first hinge shaft, and the other end is connected to the corresponding hinged support by a second hinge shaft. When installing, it is necessary to ensure that the first hinge shaft and the second hinge shaft connected to the same connecting rod 1-2 are parallel, and all the first hinge shafts installed on the same support beam 1-3 are parallel to each other.

[0039] As a preferred embodiment, the embodiment uses a locking bolt to lock the relative position of the shaft sleeve 1-1 and the central shaft 2, which is named the first locking bolt. A locking hole 1-5 adapted to the first locking bolt is provided between any adjacent hinged supports of the central sleeve. In order to facilitate operation, the locking holes 1-5 on each shaft sleeve can be arranged in a row transversely aligned. The locking hole 1-5 is a through-hole threaded hole, the inner end of which communicates with the cylinder cavity of the central sleeve, and the axis thereof is consistent with the radial direction of the shaft sleeve 1-1.

[0040] As an alternative, the first fastener can also be a quick-release clamp that is easy to disassemble. The quick-release clamp can be fixed at any position on the central shaft 2 when locked. In practice, the two quick-release clamps are respectively installed on the outside of the two outer end bushings to act as a blockage. When the two sets of connecting rods connecting the two outer end bushings are tilted relative to each other, the radial expansion dimension of the drum inner support mechanism can be maintained without decreasing, thus serving as the top support of the drum.

[0041] Three supporting beams 1-3 are evenly distributed around the central shaft 2, arranged in an equilateral triangle configuration, and parallel to the central shaft 2. Each supporting beam 1-3 includes a supporting beam body, multiple ball-head sliders, and two sliding plugs on the left and right.

[0042] The supporting beam body includes two parallel supporting plates, each with an inverted L-shaped cross-section. The left and right ends of the two parallel supporting plates are fixedly connected as a single unit by sealing plates. A gap is left between the two parallel supporting plates, forming the sliding guide rail. Figure 10 As shown, the sliding guide rail includes a first sliding groove 1-3-1 and a second sliding groove 1-3-2. The first sliding groove 1-3-1 is located at the top of the supporting beam body, and its width is smaller than that of the second sliding groove 1-3-2. The second sliding groove 1-3-2 is located on the side of the supporting beam body near the bushing 1-1, with its top communicating with the first sliding groove 1-3-1 and its bottom open. The width of the second sliding groove 1-3-2 is adapted to the thickness of the connecting rod 1-2, allowing one end of the connecting rod 1-2 to extend into the second sliding groove 1-3-2 and connect to two parallel support plates through a second hinge shaft.

[0043] The multiple ball-head sliders 1-6 are sequentially installed in the middle of the supporting beam body, located between the left and right sliding plugs 1-4. The top of each ball-head slider 1-6 has a spherical structure protruding from the supporting beam body, used to support the beam 1-3 when it expands outwards and abuts against the inner wall of the drum. The ball-head slider 1-6 can be a universal ball seat or a stationary spherical structure; its purpose is to reduce friction between the inner wall of the drum and the supporting beam 1-3 after the supporting beam 1-3 is in place. This spherical design allows for smooth translation of the drum's inner support mechanism 1 during installation, and allows the material roll 5 to rotate relative to the inner support mechanism 1 during use, making it easier to pull and pull the rolled material, especially suitable for very thin metal sheet rolls.

[0044] In such Figure 1 In the example shown, the ball-head sliders 1-6 are connected by means of... Figure 9The ball screw structure is configured by screwing a first nut on the ball screw with a certain distance between the first nut and the head of the ball screw, clamping the ball screw between the two parallel support plates with the head of the ball screw outside the support beam body, and the first nut in the second sliding groove 1-3-2. The outer diameter of the first nut is larger than the width of the first sliding groove 1-3-1 and smaller than the width of the second sliding groove 1-3-2, so that the ball screw can move along the support beam body, but cannot be separated from it.

[0045] The sliding plug 1-4 is provided with a backing plate, a baffle and a second fastener.

[0046] The bottom surface of the backing plate is provided with a transversely penetrating clamping groove, the width of the clamping groove is adapted to the overall width of the support beam body, and the sliding plug 1-4 is clamped on the support beam body through the clamping groove.

[0047] The baffle is vertically erected at the inner side edge of the top surface of the backing plate and is fixedly connected with the backing plate, and the whole is L-shaped. In practice, the backing plate and the baffle can be made of angle iron or angle steel with a certain thickness.

[0048] The second fastener includes a second tightening bolt 1-4-1 and a second nut. The backing plate is provided with a hole through which the second tightening bolt 1-4-1 passes. The head of the second tightening bolt is located in the second sliding groove 1-3-2, and the tail passes through the first sliding groove 1-3-1 and the backing plate and is threadedly connected with the second nut. The outer diameter of the second nut and the head of the second tightening bolt is larger than the width of the first sliding groove 1-3-1, and the outer diameter of the second nut is larger than the hole diameter of the hole in the backing plate. Due to the size constraint, after the assembly is completed, the sliding plug 1-4 can move along the support beam body, but cannot be separated from it. At the same time, in order to facilitate operation during installation, the head of the second tightening bolt is polygonal, and the two sides of the head abut against the inner wall of the second sliding groove 1-3-2, so that it has no rotational freedom. When the second nut is screwed, the second tightening bolt cannot rotate due to the blocking of the inner wall of the second sliding groove 1-3-2, but can only move axially, so as to lock the backing plate and the top surface of the support beam body and fix the sliding plug 1-4 at a specific position of the support beam body.

[0049] In different embodiments, the number of shaft sleeves 1-1 and support beams 1-3 can be more than two to achieve the purpose of the scheme, but in order to ensure the stability of the structure, it is generally preferred to design more than three, but the more the better, because there are inevitable errors in the machining and assembly precision between each part, in order to avoid the interlocking of the mechanism caused by the error, and reduce the requirement for machining precision as much as possible, the number of shaft sleeves 1-1 and support beams 1-3 is generally preferred to be controlled between three and four. The length of the support beam 1-3 can be determined according to the maximum length of the material roll used in the actual scene, and a certain amount of pulling allowance is left.

[0050] The length of the connecting rod 1-2 used in the mechanism must be the same as the connecting rod connected to the same shaft sleeve 1-1, but the length of the connecting rod 1-2 connected to different shaft sleeves 1-1 can be the same or different. As a preferred embodiment, the two groups of connecting rods connected to the two outermost shaft sleeves 1-1 should always be opposite in inclination direction relative to the center shaft 2, so that the two outermost shaft sleeves 1-1 are controlled to move closer or farther away from each other, and each support beam 1-3 can be expanded or contracted outward, which is convenient to operate, and the trapezoidal support structure is more stable than the parallelogram support structure. When the number of shaft sleeves is more than three, the connecting rod group in the middle can be inclined in any direction.

[0051] The support structure 3 includes a base and two steel pipe columns vertically arranged in the middle of the base, and a corresponding U-shaped clamping groove is formed at different heights of the two steel pipe columns. The two ends of the center shaft 2 are held by the U-shaped clamping grooves at the same height on the left and right steel pipe columns. The U-shaped clamping groove is formed near the front side or the rear side of the steel pipe column, and the upper part is connected to the outside through a cutout, which is the entrance for the center shaft. The lower part is a circular arc-shaped groove with the opening facing upward. As a preferred embodiment, a plurality of U-shaped clamping grooves can be formed on the front side and the rear side of the steel pipe column, and the U-shaped clamping grooves on the front side and the rear side are alternately lowered in height. This design has more choices for the step length of the material roll height adjustment compared to a single row of clamping grooves on one side of the column.

[0052] On the basis of meeting the above structural characteristics, the unwinding mechanism of the present embodiment can install the material roll 5 according to the following process. For easy description, the three shaft sleeves are defined as first, second and third shaft sleeves.

[0053] Installation method: the shaft sleeve 1-1 of the reel inner support mechanism is sequentially sleeved on the center shaft rod 2, and the two sliding plugs 1-4 on each support beam 1-3 are moved to the outermost side of the support beam 1-3; the two shaft sleeves 1-1 at the outer end are pulled outward, the inclination angle of each connecting rod 1-2 changes, and the support beam 1-3 is close to the center shaft rod 2; the reel inner support mechanism with the diameter contracted to the position is placed in the reel of the material roll, if the inner diameter of the reel is smaller or the length of the material roll is longer, it is difficult to lock all the first fastening bolts from the inside of the reel, the first shaft sleeve can be located at the outer side of the reel or near the edge of the reel, and the first fastening bolt connected to the first shaft sleeve is screwed to make the end of the first fastening bolt tightly abut against the center shaft rod 2, thereby fixing the position of the first shaft sleeve on the center shaft rod 2; then the position of the third shaft sleeve on the center shaft rod 2 is moved to be close to the first shaft sleeve, the reel inner support mechanism is radially expanded, and the spherical head sliding block 1-6 on the top surface of each support beam 1-3 is abutted against the inner wall of the reel through the spherical surface structure; the position of the third shaft sleeve and the center shaft rod 2 is manually stabilized, the material roll or the reel inner support mechanism is pulled to generate relative displacement, the first shaft sleeve is moved to the inside of the reel, and the second and third shaft sleeves are moved out; after the fixation of all the first fastening bolts is completed, the material roll 5 or the reel inner support mechanism is pulled, the material roll 5 is adjusted to the appropriate position of the support beam 1-3, the sliding plug 1-4 at the two ends of each support beam 1-3 is moved to make the baffle block the side surface of the material roll 5, the second nut is screwed, and the sliding plug 1-4 and the support beam body are locked; then the center shaft rod 2 is placed on the support structure, and the installation is completed.

[0054] Disassembly method: after the material is discharged, the sliding plug 1-4 is loosened and removed, the reel or the reel inner support mechanism is pulled, the first fastening bolt is sequentially loosened, the first and third shaft sleeves are pulled outward, the support beam 1-3 is contracted in the direction of the center shaft rod 2, and the reel can be taken off. Example 2

[0055] A material cutting frame includes a cutting operation table and a reel unwinding mechanism as described in Example 1, and the support structure can be a floor support arranged on one side of the cutting operation table or a table support fixedly installed on one side of the cutting operation table.

[0056] In Figures 5 to 8 In the specific example shown, the support structure 3 adopts a floor support, the base adopts a flat plate design, and when in use, it is stretched into the lower part of the operation table to make the material roll 5 as close to the table surface of the operation table 4 as possible. The bottom surface of the base is provided with anti-skid pads, and the base is reinforced between the steel pipe stand and the inclined support. According to the installation method described in Example 1, after the material roll 5 is installed on the reel inner support mechanism 1, the appropriate height is selected, and the center reel shaft 2 is supported. Then, the material is pulled out from one side of the material roll 5 to the cutting operation table 4 to implement the subsequent cutting operation.

[0057] It should be noted that the above embodiments are only used to illustrate the technical solutions of the utility information and are not limited. Although the utility information is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the utility information can be modified or equivalently replaced without departing from the spirit and scope of the utility information, and they should be covered in the scope of the claims of the utility information.

Claims

1. A pay-off mechanism, comprising a reel inner support mechanism (1), a center shaft (2) and a support structure (3) for lifting the center shaft (2), characterized in that: the reel inner support mechanism (1) comprises a plurality of shaft sleeves (1-1), connecting rods (1-2) and support beams (1-3) ; the plurality of shaft sleeves (1-1) are sequentially sleeved on the center shaft (2) and are respectively locked and connected with the center shaft (2) by first fasteners, each shaft sleeve (1-1) is respectively connected with each support beam (1-3) by a connecting rod (1-2), and both ends of each connecting rod (1-2) are connected with the corresponding shaft sleeve (1-1) and support beam (1-3) in a hinged manner; the plurality of support beams (1-3) are uniformly distributed around the center shaft (2) and are parallel to the center shaft (2) ; each support beam (1-3) is provided with a support beam body, a plurality of ball head sliders (1-6) and left and right two sliding plugs (1-4) ; the support beam body is provided with a sliding groove guide rail extending in the axial direction, the plurality of ball head sliders (1-6) and the left and right two sliding plugs (1-4) are installed in the sliding groove guide rail and are slidingly connected with the support beam body, and the ball head sliders (1-6) are arranged between the left and right two sliding plugs (1-4) ; the top of the ball head slider (1-6) is provided with a spherical surface structure protruding from the support beam body for abutting against the inner wall of the reel; the sliding plug (1-4) is provided with a baffle for blocking the reel from the side. 2.The pay-off mechanism according to claim 1, characterized in that: the support beam body comprises two oppositely arranged parallel support plates, a space is left between the two parallel support plates to form the sliding groove guide rail, and the sliding groove guide rail comprises a first sliding groove (1-3-1) and a second sliding groove (1-3-2), wherein the first sliding groove (1-3-1) is located at the top of the support beam body, and the width of the first sliding groove (1-3-1) is smaller than that of the second sliding groove (1-3-2) ; the second sliding groove (1-3-2) is located on the side of the support beam body close to the shaft sleeve (1-1), the top of the second sliding groove (1-3-2) is communicated with the first sliding groove (1-3-1), and the width of the second sliding groove (1-3-2) is adapted to the thickness of the connecting rod (1-2) ; one end of the corresponding connecting rod (1-2) is inserted into the second sliding groove (1-3-2) and connected with the two parallel support plates through a hinge shaft. 3.The pay-off mechanism according to claim 2, characterized in that: the ball head slider (1-6) is composed of a ball head screw and a first nut screwed on the ball head screw, the spherical surface structure of the ball head screw is located on the outside of the support beam body, the first nut is arranged in the second sliding groove (1-3-2), and the outer diameter of the first nut is larger than the width of the first sliding groove (1-3-1) and smaller than the width of the second sliding groove (1-3-2). 4.The pay-off mechanism according to claim 2, characterized in that: The sliding plug (1-4) is provided with a backing plate, a baffle and a second fastener. The backing plate is laid on the support beam body, the baffle is vertically erected at one side edge of the top surface of the backing plate and is fixedly connected with the backing plate. The second fastener comprises a second fixing bolt and a second nut. A hole through which the second fixing bolt passes is formed in the backing plate. The head of the second fixing bolt is located in the second sliding groove (1-3-2), the tail of the second fixing bolt is threadedly connected with the second nut after passing through the first sliding groove (1-3-1) and the backing plate, the head size of the second fixing bolt is greater than the width of the first sliding groove (1-3-1), and the outer diameter size of the second nut is greater than the hole diameter of the hole.

5. The unwinding mechanism of claim 4, wherein: The head of the second fixing bolt is polygonal, and the side surface thereof abuts against the inner wall of the second sliding groove (1-3-2) without rotational movement freedom.

6. The unwinding mechanism of claim 4, wherein: A transversely-through card slot is formed in the bottom surface of the backing plate. The width of the card slot is adapted to the overall width of the support beam body. The sliding plug (1-4) is clamped on the support beam body through the card slot.

7. The unwinding mechanism of claim 1, wherein: The shaft sleeve (1-1) comprises a central sleeve and a plurality of hinged supports arranged on the outer wall of the central sleeve. The plurality of hinged supports correspond to the support beams one by one and are uniformly distributed on the circumferential side of the central sleeve. The first fastener is a first fixing bolt. A fixing hole (1-5) adapted to the first fixing bolt is formed in the central sleeve between adjacent hinged supports, and the fixing holes on each shaft sleeve (1-1) are axially aligned. The fixing hole is a through-hole threaded hole, the inner side of which is in communication with the cylinder cavity of the central sleeve, and the axis thereof is consistent with the radial direction of the central sleeve.

8. The unwinding mechanism of claim 1, wherein: The inclination directions of the two groups of connecting rods connected with the two outermost shaft sleeves (1-1) are opposite relative to the central shaft rod (2).

9. The unwinding mechanism of claim 1, wherein: The support structure (3) comprises a base and two steel pipe columns vertically erected in the middle of the base. Each steel pipe column is provided with a column of U-shaped card slots on the front side and the rear side, respectively. Each U-shaped card slot on the front side is staggered in the height direction with each U-shaped card slot on the rear side, and the U-shaped card slots on the front and rear sides are alternately lowered or raised in the vertical direction. The upper part of the U-shaped card slot is in communication with the outside through a cutout, and the cutout is the inlet of the central shaft rod (2). The lower part is a circular arc-shaped groove with the opening facing upward. The U-shaped card slots at different height positions on the two steel pipe columns correspond to each other, and the two ends of the central shaft rod (2) are lifted via the U-shaped card slots at the same height on the two steel pipe columns.

10. A material cutting frame, characterized by, The unwinding mechanism comprises a cutting operation table (5) and the unwinding mechanism as claimed in any one of claims 1-9. The support structure is a floor support arranged on one side of the cutting operation table or a table support fixedly installed on one side of the cutting operation table.

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