CN211034630U

CN211034630U - Drawing folding device

Info

Publication number: CN211034630U
Application number: CN201921898151.8U
Authority: CN
Inventors: 张保强
Original assignee: Henan Zhengtai Construction Engineering Consulting Co ltd
Current assignee: Henan Zhengtai Construction Engineering Consulting Co ltd
Priority date: 2019-11-05
Filing date: 2019-11-05
Publication date: 2020-07-17
Anticipated expiration: 2029-11-05

Abstract

The utility model relates to a drawing folding device, which comprises a frame, wherein a support plate is arranged on the frame, a paper feeding groove is arranged on the support plate, and sliding grooves are arranged on the support plates at the two sides of the paper feeding groove; clamping devices for clamping drawings are matched in sliding grooves on two sides of the paper feeding groove in a sliding manner; a first supporting shaft is rotatably supported in the paper feeding groove, and a first paper pressing roller is coaxially fixed on the first supporting shaft; a second support shaft is rotatably supported in the paper feeding groove, and a second paper pressing roller is coaxially fixed on the second support shaft; a first gear is coaxially fixed at one end of the first support shaft, a second gear is coaxially fixed at one end of the second support shaft, and the first gear and the second gear are meshed with each other; the first supporting shaft is connected with a driving device which drives the first supporting shaft to rotate and simultaneously drives the clamping device to move along the sliding groove. The utility model discloses have the convenience and carry out folding effect to the drawing.

Description

Drawing folding device

Technical Field

The utility model belongs to the technical field of office equipment's technique and specifically relates to a drawing folding device is related to.

Background

Engineering drawing draws or prints and need fold according to the standard after accomplishing to conveniently carry out proper preservation to the drawing, and folding to the drawing at present is carried out by hand mostly, and not only folding neat inadequately, wastes time and energy moreover.

At present, the patent document with the publication number of CN207998354U discloses a quick folding drawing tool, including ruler, scale, clamp chi and gap, be equipped with the scale on the ruler, press from both sides the chi vertical fixation on the ruler, press from both sides and be equipped with a gap on the chi, the gap extends to ruler one side from the tip that presss from both sides the chi, and the length in gap is less than the length that presss from both sides the chi.

When the quick folding drawing tool is used, the drawing can be positioned at a position where the drawing needs to be folded only through the tool, the drawing folding action still needs to be carried out manually, and when the required folding drawing breadth is large (such as A0 drawing), the drawing tool is very inconvenient to fold by hand.

SUMMERY OF THE UTILITY MODEL

To the not enough that exists among the above-mentioned prior art, the utility model aims at providing a drawing folding device, it is through setting up two dancer rolls to make the drawing pass through gradually between two dancer rolls through clamping device, have the convenience and carry out folding effect to the drawing.

The above object of the present invention is achieved by the following technical solutions:

a drawing folding device comprises a rack, wherein a support plate is arranged on the rack, and a rectangular paper feeding groove is formed in the support plate; sliding grooves are formed in the supporting plates on the two sides of the paper feeding groove, and the length direction of each sliding groove is perpendicular to the length direction of the paper feeding groove; clamping devices for clamping drawings are matched in sliding grooves on two sides of the paper feeding groove in a sliding mode; a first support shaft is rotatably supported in the paper feeding groove, is arranged along the length direction of the paper feeding groove, and is coaxially fixed with a first paper pressing roller; a second support shaft arranged in parallel to the first support shaft is rotatably supported in the paper feeding groove, and a second platen roller is coaxially fixed on the second support shaft; the outer wall of the second paper pressing roller is tangent to the outer wall of the first paper pressing roller; a first gear is coaxially fixed at one end of the first support shaft, a second gear is coaxially fixed at one end of the second support shaft, and the first gear and the second gear are meshed with each other; the first supporting shaft is connected with a driving device which drives the first supporting shaft to rotate and simultaneously drives the clamping device to move along the sliding groove.

By adopting the technical scheme, when the drawing is folded, two edges of the drawing are respectively fixed on the two clamping devices, the first supporting shaft is rotated through the driving device so as to rotate the two paper pressing rollers, and the middle part of the drawing is squeezed between the two paper pressing rollers to be folded; meanwhile, the driving device enables the clamping device to gradually move towards the paper feeding groove along the sliding groove so as to uniformly feed paper, the drawing edge is guaranteed to be aligned after being folded, and the drawing is more convenient to fold.

The utility model discloses a further set up to: the supporting plates on two sides of the paper feeding groove are respectively provided with two sliding grooves, and the sliding grooves penetrate through the supporting plates; the four sliding chutes on two sides of the paper feeding groove are positioned on the same straight line in pairs; each clamping device is in sliding fit with the two sliding grooves on the same side of the paper feeding groove.

Through adopting above-mentioned technical scheme, make clamping device sliding fit in two spouts of paper feed groove homonymy, clamping device is more stable when removing, is favorable to guaranteeing the stability that clamping device removed when form advancing.

The utility model discloses a further set up to: the clamping device comprises a sliding seat, and the sliding seat comprises two vertical plates arranged in parallel and a horizontal plate for fixedly connecting the two vertical plates; sliding blocks are integrally arranged at the end parts of the two vertical plates, and the two sliding blocks are respectively in sliding fit in the two sliding grooves; the horizontal plate is made of magnetic materials, a strip-shaped paper clamping block is rotatably supported between the two vertical plates, the paper clamping block is made of magnetic materials, and a rotating shaft of the paper clamping block is perpendicular to the plate surfaces of the vertical plates; the paper clamping block comprises a surface which can be attached to the lower surface of the horizontal plate.

By adopting the technical scheme, before the drawing paper is folded, the surface of the paper clamping block, which is attached to the horizontal plate, is opened, and the drawing paper is plugged between the paper clamping block and the horizontal plate, so that the paper clamping block and the horizontal plate are attached to each other through magnetism, and the function of clamping the edge of the drawing paper is realized.

The utility model discloses a further set up to: the paper feeding device is characterized in that a rectangular limiting plate is fixedly arranged on the sliding seat, the limiting plate is vertically arranged on one side, opposite to the paper feeding groove, of the sliding seat, and the limiting plate, the two vertical plates and the horizontal plate are mutually fixed.

Through adopting above-mentioned technical scheme, the limiting plate can restrict the position at drawing edge, when two marginal centre grippings of drawing were on two clamping device of spout both sides, made the drawing can be about the mutual symmetry in both sides in paper feed groove to be favorable to making the edge of drawing align each other after folding.

The utility model discloses a further set up to: the surface of the supporting plate at two sides of the paper feeding groove is fixedly provided with a plurality of pushing blocks, and the pushing blocks positioned at the same side of the paper feeding groove are all positioned on the same straight line vertical to the sliding groove; and a limiting plate of the sliding seat is provided with a through hole corresponding to the pushing block.

By adopting the technical scheme, when the sliding seat moves to the pushing block during paper folding, the pushing block can push the paper clamping block to rotate, so that the paper is loosened, and the drawing can completely pass through the two paper pressing rollers to complete paper folding; the pushing block can conveniently pass through the sliding seat through the through hole.

The utility model discloses a further set up to: the paper clamping block is fixedly provided with a poking block, and the poking block is in sliding fit in the arc-shaped groove.

Through adopting above-mentioned technical scheme, when needs carry out the centre gripping to the drawing, stir the face that makes that the shifting block can be convenient press from both sides paper piece and horizontal plate laminating and open with the hand to the edge jam of drawing is advanced between pressing from both sides paper piece and the horizontal plate conveniently.

The utility model discloses a further set up to: a connecting plate is integrally arranged below the sliding block of the sliding seat and the sliding block; the driving device comprises a worm wheel coaxially fixed on the first supporting shaft, a worm is rotatably supported on the rack, and the worm is meshed with the worm wheel; a rotating wheel is coaxially and fixedly arranged on one end part of the worm; two unwinding disks are coaxially fixed on the first supporting shaft and respectively correspond to the two sliding chutes on the same straight line; every all fixedly on the reel of unreeling is provided with two and connects the rope, and the one end of two connection ropes is all fixed on the reel of unreeling, and the other end is fixed respectively on two connecting plates towards the face of first supporting axle.

By adopting the technical scheme, a worker can drive the worm to rotate by rotating the rotating wheel, so that the worm wheel is driven to rotate, and the first support shaft is driven; when the first supporting shaft rotates, the two unreeling discs are driven to rotate simultaneously, the unreeling discs rotate to enable the two connecting ropes to be coiled on the unreeling discs simultaneously, so that the two sliding seats are pulled to move oppositely and move at the same speed, the middle of a drawing can be folded stably in the folding device, and the edge of the drawing is enabled to be aligned after being folded.

The utility model discloses a further set up to: the connecting plate is fixedly provided with a tension spring on the plate surface back to the first supporting shaft, the length direction of the tension spring is perpendicular to the plate surface of the supporting plate, and the other end of the tension spring is fixed on the rack.

Through adopting above-mentioned technical scheme, the extension spring can make the seat that slides carry out the tensioning with the drawing of centre gripping between paper clamping block and horizontal plate, guarantees the folding planarization of drawing.

The utility model discloses a further set up to: a paper pressing knife is arranged above the paper feeding groove, and one end part of the paper pressing knife is hinged to the edge of the paper feeding groove; the paper pressing knife is provided with a cutting edge corresponding to the joint of the two paper pressing rollers, and the cutting edge is chamfered into a round angle.

By adopting the technical scheme, when the drawing is folded, the paper pressing knife is pressed in the middle of the drawing, and the folded part of the drawing enters between the two paper pressing rollers under the action of the cutting edge of the paper pressing knife, so that the efficiency and the convenience for folding the drawing are improved.

To sum up, the utility model discloses a beneficial technological effect does:

1. when the drawing is folded, two edges of the drawing are respectively fixed on the two clamping devices, the first supporting shaft is rotated through the driving device so as to rotate the two paper pressing rollers, and the middle part of the drawing is squeezed between the two paper pressing rollers to be folded; meanwhile, the driving device enables the clamping device to gradually move towards the paper feeding groove along the sliding groove so as to uniformly feed paper, so that the alignment of the edge of the drawing is kept after the drawing is folded, and the drawing is more convenient to fold;

2. the clamping device is in sliding fit with the two sliding grooves on the same side of the paper feeding groove and is more stable; the paper clamping block and the horizontal plate are matched with each other to realize the function of clamping the edge of the drawing; the limiting plate can limit the position of the edge of the drawing, and is beneficial to aligning the folded edges of the drawing; the pushing block can automatically open the paper clamping block after the sliding seat moves to a certain position;

3. the surface of the paper clamping block, which is attached to the horizontal plate, can be conveniently opened by poking the poking block with a hand; the rotating wheel can simultaneously drive the two paper pressing rollers and the two sliding seats to move; the tension spring is beneficial to ensuring the folding smoothness of the drawing; the paper pressing knife is beneficial to improving the efficiency and convenience of folding the drawing.

Drawings

FIG. 1 is a schematic view of the overall structure of the upper part of the present invention;

FIG. 2 is an enlarged partial schematic view of portion A of FIG. 1;

FIG. 3 is a schematic view of the structure of the clamping device;

FIG. 4 is a schematic view of the overall structure of the lower part of the present invention;

FIG. 5 is an enlarged partial view of portion B of FIG. 4;

fig. 6 is a schematic structural view of the driving device.

In the figure, 1, a frame; 2. a support plate; 21. a paper feeding groove; 22. a chute; 23. a pushing block; 3. a clamping device; 31. a sliding seat; 311. a vertical plate; 312. a horizontal plate; 313. a slider; 314. an arc-shaped slot; 32. a paper clamping block; 321. a shifting block; 33. a limiting plate; 331. through the hole; 34. a connecting plate; 341. a tension spring; 4. a folding device; 41. a first support shaft; 411. a first platen roller; 412. a first gear; 42. a second support shaft; 421. a second platen roller; 422. a second gear; 5. a drive device; 51. placing the reel; 52. connecting ropes; 53. a worm gear; 54. a worm; 55. a rotating wheel; 6. a paper pressing knife; 61. a blade.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, for the drawing folding device disclosed by the present invention, the drawing folding device comprises a horizontally arranged support plate 2 and a frame 1 for supporting the support plate 2 on the ground, wherein the support plate 2 has a rectangular structure; a rectangular paper feeding groove 21 is formed in the supporting plate 2, and the paper feeding groove 21 penetrates through the supporting plate 2; the length direction of the paper feeding groove 21 is parallel to the width direction of the support plate 2, and the paper feeding groove 21 is arranged in the middle of the support plate 2; two sliding grooves 22 are respectively formed in the supporting plates 2 on two sides of the paper feeding groove 21, the sliding grooves 22 penetrate through the supporting plates 2, and the length direction of the sliding grooves 22 is perpendicular to the length direction of the paper feeding groove 21; the four sliding chutes 22 on the two sides of the paper feeding slot 21 are two-by-two positioned on the same straight line; the two sliding grooves 22 on the same side of the paper feeding groove 21 are in sliding fit with a clamping device 3 for clamping a drawing, and a folding device 4 for folding the drawing is arranged below the paper feeding groove 21.

Referring to fig. 1 and 3, the clamping device 3 includes a sliding seat 31, the sliding seat 31 includes two vertical plates 311 arranged in parallel and a horizontal plate 312 fixedly connecting the two vertical plates 311, the horizontal plate 312 is rectangular, and the length direction of the horizontal plate 312 is perpendicular to the length direction of the chute 22; sliding blocks 313 are integrally arranged at the end parts of the two vertical plates 311, and the two sliding blocks 313 are respectively in sliding fit in the two sliding grooves 22; the horizontal plate 312 is made of magnetic material, the strip-shaped paper clamping block 32 is rotatably supported between the two vertical plates 311, the paper clamping block 32 is made of magnetic material, and the rotating shaft of the paper clamping block 32 is perpendicular to the plate surfaces of the vertical plates 311; the paper clamping block 32 includes a surface that can be attached to the lower surface of the horizontal plate 312; when the drawing is folded, the two paper clamping blocks 32 on the two sides of the chute 22 are mutually attached to the horizontal plate 312 through magnetism, and the two edges of the drawing are respectively clamped.

Referring to fig. 3, a rectangular limiting plate 33 is fixedly arranged on the sliding seat 31, the limiting plate 33 is vertically arranged on one side of the sliding seat 31 opposite to the paper feeding groove 21, and the limiting plate 33 is mutually fixed with two vertical plates 311 and a horizontal plate 312; the position of the edge of the drawing can be limited by the limiting plate 33, and when the two edges of the drawing are clamped on the two clamping devices 3 on the two sides of the sliding groove 22, the drawing can be symmetrical with respect to the two sides of the paper feeding groove 21, so that the edges of the drawing can be aligned with each other after being folded; an arc-shaped groove 314 is formed in the vertical plate 311, a shifting block 321 is fixedly arranged on the paper clamping block 32, and the shifting block 321 is in sliding fit in the arc-shaped groove 314; when the drawing needs to be clamped, the face, which is attached to the horizontal plate 312, of the paper clamping block 32 can be opened by poking the poking block 321 with a hand, so that the edge of the drawing is conveniently plugged between the paper clamping block 32 and the horizontal plate 312.

Referring to fig. 2 and 4, a first support shaft 41 is rotatably supported in the paper feed slot 21, and the first support shaft 41 is disposed parallel to the length direction of the paper feed slot 21; two unwinding disks 51 are coaxially fixed on the first supporting shaft 41, and the two unwinding disks 51 respectively correspond to the two sliding chutes 22 on the same straight line; referring to fig. 3, a connecting plate 34 is integrally provided below the sliding block 313 of the sliding seat 31 and the sliding block 313, the connecting plate 34 is vertically disposed, and a plate surface of the connecting plate 34 is parallel to an axis of the first support shaft 41; referring to fig. 5, each unwinding disc 51 is fixedly provided with two connecting ropes 52, one end of each connecting rope 52 is fixed on the unwinding disc 51, and the other end is fixed on the surface of the two connecting plates 34 facing the first supporting shaft 41; a tension spring 341 is fixedly arranged on the plate surface of the connecting plate 34 back to the first supporting shaft 41, the length direction of the tension spring 341 is perpendicular to the plate surface of the supporting plate 2, and the other end of the tension spring 341 is fixed on the rack 1; first supporting shaft 41 is connected with the first supporting shaft 41 pivoted drive arrangement 5 of drive, and first supporting shaft 41 can make two seats 31 that slide after rotating move in opposite directions and the speed that removes the same to can make the stable entering folding device 4 in middle part of drawing fold, be favorable to making the edge of drawing align each other after folding.

Referring to fig. 1 and 2, the folding device 4 comprises a first platen roller 411 coaxially fixed on the first support shaft 41, the first platen roller 411 being disposed between the two reels 51; a second supporting shaft 42 is rotatably supported in the paper feeding slot 21, and the second supporting shaft 42 is arranged in parallel with the first supporting shaft 41; a second platen roller 421 is coaxially fixed on the second support shaft 42, and the outer wall of the second platen roller 421 is tangent to the outer wall of the first platen roller 411; a first gear 412 is coaxially fixed at one end of the first support shaft 41, a second gear 422 is coaxially fixed at one end of the second support shaft 42, and the first gear 412 and the second gear 422 are engaged with each other; when the driving device 5 drives the first supporting shaft 41 to rotate, the second supporting shaft 42 can rotate reversely along with the first supporting shaft 41 through the transmission of the two gears, so that the two paper pressing rollers rotate reversely at the same time, the middle part of the drawing can be squeezed between the two paper pressing rollers, and the folding of the drawing is completed.

Referring to fig. 1 and 2, in order to enable the drawing sheet to be easily squeezed between the first platen roller 411 and the second platen roller 421, a platen blade 6 is provided above the paper feed slot 21, and one end of the platen blade 6 is hinged to the edge of the paper feed slot 21; the paper pressing knife 6 is provided with a cutting edge 61 corresponding to a gap where the two paper pressing rollers are attached, and the cutting edge 61 is inverted into a round angle so as to avoid cutting off the paper; when the paper is folded, the paper pressing knife 6 is pressed down, and the folded part of the drawing enters between the two paper pressing rollers under the action of the cutting edge 61 of the paper pressing knife 6, so that the efficiency and convenience for folding the drawing are improved.

Referring to fig. 1 and 3, a plurality of pushing blocks 23 are fixedly arranged on the plate surfaces of the supporting plates 2 at two sides of the paper feeding slot 21, and the pushing blocks 23 positioned at the same side of the paper feeding slot 21 are all positioned on the same straight line perpendicular to the chute 22; the limiting plate 33 of the sliding seat 31 is provided with a through hole 331 corresponding to the pushing block 23; when the sliding seat 31 moves to the pushing block 23 during paper stacking, the pushing block 23 can push the paper clamping block 32 to rotate, so that the paper is loosened, and the drawing can completely pass through the two paper pressing rollers to complete paper stacking; the pushing block 23 can be conveniently passed through the sliding seat 31 through the hole 331.

Referring to fig. 6, the driving device 5 includes a worm wheel 53 coaxially fixed on the first supporting shaft 41, a worm 54 is rotatably supported on the frame 1, and the worm 54 is engaged with the worm wheel 53; a rotating wheel 55 is coaxially and fixedly arranged at one end of the worm 54, and a worker can drive the worm 54 to rotate by rotating the rotating wheel 55, so that the worm wheel 53 is driven to rotate, and the first support shaft 41 is driven.

The working principle of the utility model is that when the drawing needs to be folded, two edges of the drawing are respectively fixed on two sliding seats 31 through two paper clamping blocks 32, the paper pressing knife 6 is reused to press the drawing at the gap between two paper pressing rollers, and the worker drives the first supporting shaft 41 and the second supporting shaft 42 by rotating the rotating wheel 55, so as to drive the first paper pressing roller 411 and the second paper pressing roller 421 to rotate, so that the middle part of the drawing is squeezed between the two paper pressing rollers; meanwhile, the connecting rope 52 pulls the two sliding seats 31 to gradually move towards the paper feeding groove 21, so that paper feeding at an even speed is realized, the remaining lengths of the drawings on the two sides of the paper feeding groove 21 are kept the same all the time when the drawings are folded, and the drawings are folded more neatly.

The embodiment of the present invention is a preferred embodiment of the present invention, which is not limited in this way to the protection scope of the present invention, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The drawing folding device comprises a machine frame (1) and is characterized in that: a support plate (2) is arranged on the rack (1), and a rectangular paper feeding groove (21) is formed in the support plate (2); sliding grooves (22) are formed in the supporting plates (2) on the two sides of the paper feeding groove (21), and the length direction of each sliding groove (22) is perpendicular to the length direction of the paper feeding groove (21); the sliding grooves (22) on the two sides of the paper feeding groove (21) are internally matched with clamping devices (3) used for clamping drawings in a sliding manner; a first supporting shaft (41) is rotatably supported in the paper feeding groove (21), the first supporting shaft (41) is arranged along the length direction of the paper feeding groove (21), and a first paper pressing roller (411) is coaxially fixed on the first supporting shaft (41); a second support shaft (42) which is parallel to the first support shaft (41) is rotatably supported in the paper feeding groove (21), and a second platen roller (421) is coaxially fixed on the second support shaft (42); the outer wall of the second paper pressing roller (421) is tangent to the outer wall of the first paper pressing roller (411); a first gear (412) is coaxially fixed at one end of the first supporting shaft (41), a second gear (422) is coaxially fixed at one end of the second supporting shaft (42), and the first gear (412) and the second gear (422) are meshed with each other; the first supporting shaft (41) is connected with a driving device (5) which drives the first supporting shaft (41) to rotate and simultaneously drives the clamping device (3) to move along the sliding groove (22).

2. The drawing folding apparatus according to claim 1, wherein: the supporting plates (2) on the two sides of the paper feeding groove (21) are respectively provided with two sliding grooves (22), and the sliding grooves (22) penetrate through the supporting plates (2); four sliding grooves (22) on two sides of the paper feeding groove (21) are positioned on the same straight line in pairs; each clamping device (3) is in sliding fit with two sliding grooves (22) on the same side of the paper feeding groove (21).

3. The drawing folding apparatus according to claim 2, wherein: the clamping device (3) comprises a sliding seat (31), the sliding seat (31) comprises two vertical plates (311) which are arranged in parallel and a horizontal plate (312) which fixedly connects the two vertical plates (311); sliding blocks (313) are integrally arranged at the end parts of the two vertical plates (311), and the two sliding blocks (313) are respectively in sliding fit in the two sliding grooves (22); the horizontal plate (312) is made of magnetic materials, the strip-shaped paper clamping block (32) is rotatably supported between the two vertical plates (311), the paper clamping block (32) is made of magnetic materials, and a rotating shaft of the paper clamping block (32) is perpendicular to the plate surfaces of the vertical plates (311); the paper clamping block (32) comprises a surface which can be attached to the lower surface of the horizontal plate (312).

4. A drawing folding apparatus according to claim 3, wherein: the paper feeding mechanism is characterized in that a rectangular limiting plate (33) is fixedly arranged on the sliding seat (31), the limiting plate (33) is vertically arranged on one side, opposite to the paper feeding groove (21), of the sliding seat (31), and the limiting plate (33) is mutually fixed with the two vertical plates (311) and the horizontal plate (312).

5. The drawing folding apparatus according to claim 4, wherein: the surface of the supporting plate (2) at two sides of the paper feeding groove (21) is fixedly provided with a plurality of pushing blocks (23), and the pushing blocks (23) positioned at the same side of the paper feeding groove (21) are all positioned on the same straight line vertical to the sliding groove (22); a limiting plate (33) of the sliding seat (31) is provided with a through hole (331) corresponding to the pushing block (23).

6. A drawing folding apparatus according to claim 3, wherein: an arc-shaped groove (314) is formed in the vertical plate (311), a shifting block (321) is fixedly arranged on the paper clamping block (32), and the shifting block (321) is in sliding fit in the arc-shaped groove (314).

7. A drawing folding apparatus according to claim 3, wherein: a connecting plate (34) is integrally arranged below the sliding block (313) of the sliding seat (31) and the sliding block (313); the driving device (5) comprises a worm wheel (53) coaxially fixed on the first supporting shaft (41), a worm (54) is rotatably supported on the rack (1), and the worm (54) is meshed with the worm wheel (53); a rotating wheel (55) is coaxially and fixedly arranged on one end part of the worm (54); two unwinding disks (51) are coaxially fixed on the first supporting shaft (41), and the two unwinding disks (51) are respectively corresponding to the two sliding chutes (22) which are positioned on the same straight line; each unwinding disc (51) is fixedly provided with two connecting ropes (52), one ends of the two connecting ropes (52) are fixed on the unwinding disc (51), and the other ends of the two connecting ropes are fixed on the surfaces, facing the first supporting shafts (41), of the two connecting plates (34) respectively.

8. The drawing folding apparatus according to claim 7, wherein: the plate surface of the connecting plate (34) back to the first supporting shaft (41) is fixedly provided with a tension spring (341), the length direction of the tension spring (341) is perpendicular to the plate surface of the supporting plate (2), and the other end of the tension spring (341) is fixed on the rack (1).

9. A drawing folding apparatus according to any one of claims 1 to 3, wherein: a paper pressing knife (6) is arranged above the paper feeding groove (21), and one end part of the paper pressing knife (6) is hinged to the edge of the paper feeding groove (21); the paper pressing knife (6) is provided with a cutting edge (61) corresponding to a gap where the two paper pressing rollers are attached, and the cutting edge (61) is rounded.