CN218140652U - Safety device for printing machine - Google Patents

Abstract

The utility model relates to a lithography apparatus technical field, concretely relates to safety device for printing machine, including the base, still include printing part, bent type frame, moving part, bent type baffle, fan a, dust absorption mouth, fan b and induction port, the outer wall bottom of printing part and the outer wall top right side fixed connection of base, the quantity that bent type frame set up is two, the outer wall bottom of bent type frame just is located the outer wall left side fixed connection of printing part with the outer wall top front and back side of base, and can know through the above-mentioned mode the utility model discloses can effectively treat the wastepaper dust that the seal paper adhered to stay and the printing ink granule that produces when treating the seal paper printing and get rid of to avoid the wastepaper dust to cause the damage to the printing cylinder, also can avoid the printing ink granule to cause harm to workman's health.

Description

Safety device for printing machine

Technical Field

The utility model relates to a lithography apparatus technical field, concretely relates to safety device for printing machine.

Background

A printer is a machine that prints text and images. Modern printing machines are generally composed of mechanisms for plate loading, inking, stamping, paper feeding, etc. The working principle is as follows: the characters and images to be printed are made into printing plate, then it is mounted on the printing machine, then the ink is coated on the position of the characters and images on the printing plate by manual or printing machine, then it is directly or indirectly transferred onto paper or other printing material, so that the same printed matter as that of the printing plate can be reproduced. The invention and the development of the printing machine play an important role in the propagation of human civilization and culture.

When current printing machine is specifically used, operating personnel will treat that the seal paper stretches into from the space, then driving motor drives the printing cylinder and rotates, the printing cylinder is treated the seal paper and is driven when printing and treat that the seal paper passes through from the space, the secondary roller rotates along with treating the seal paper, play the supplementary effect of treating the seal paper and pass through from the space, and at the in-process of filling in the seal paper, operating personnel is not touch the printing cylinder carelessly, light then the hand grinds the skin, heavy then the hand can be drawn into the space by the printing cylinder, has great potential safety hazard, and based on this, chinese patent bulletin number is a printing machine safety device in CN214492053U, including workstation, printing cylinder and secondary roller, be equipped with two curb plates on the workstation, the both ends of printing cylinder and secondary roller are all rotated and are connected on two curb plates, leave the space that supplies to treat that the seal paper passes through between printing cylinder and the secondary roller, be equipped with the guard plate on the workstation, the guard plate is located one side that the seal paper got into the printing cylinder gets into, just to the setting of first secondary groove, just to the guard plate setting up the space.

The beneficial effects of above-mentioned patent technology are that, operating personnel is located the one side that the printing cylinder was kept away from to the guard plate, then will wait to print in the paper fills in the space from first logical groove, operating personnel's hand is located the one side that the printing cylinder was kept away from to the guard plate all the time, directly not contact with the printing cylinder, can increase the security of operating personnel's operation, however, current printing machine is when printing to printing paper, printing paper is probably mixed with wastepaper and dust because of the reason of storing, and remaining wastepaper and dust have probably to glue on the printing cylinder at the printing in-process, and then can cause the influence to the printing of printing cylinder to printing paper, the diluting agent that generally adds in the printing ink that uses simultaneously when printing contains toxic components such as benzene, pungent smell is great, the inking roller has printing ink to float in the air at the in-process of swing biography ink, the printing ink granule is very tiny, the adsorption efficiency is stronger, the contaminated air, long-term inhales can influence brain central nerve, cause very big harm to human health.

Therefore, a safety guard for a printer is needed.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a safety device for printing machine, when printing to the printing paper with solving current printing machine, the printing paper is probably mixed wastepaper and dust because the reason of storing, and remaining wastepaper and dust glue probably and exist on the printing cylinder in the printing process, and then can cause the influence to the printing of printing cylinder to the printing paper, the common diluent that adds in the printing ink that uses when printing simultaneously contains toxic components such as benzene, pungent smell is great, it has printing ink to fly away in the air at the in-process of swing biography ink to beat the china ink roller, the printing ink granule is very tiny, adsorption efficiency is stronger, air pollution, long-term the inhaling can influence brain central nervous, cause the problem of very big harm to human health.

In order to achieve the above object, the present invention provides the following technical solutions: safety device for printing machine, including the base, still include printing part, bent type frame, moving part, bent type baffle, fan a, dust absorption mouth, fan b and induction port, the outer wall bottom of printing part and the outer wall top right side fixed connection of base, the quantity that bent type frame set up is two, the outer wall left side fixed connection that the side just is located printing part around the outer wall top of the outer wall bottom of bent type frame and the outer wall top of base, the front and back end of moving part respectively with the inner wall sliding connection of bent type frame, bent type baffle sets up the outer wall upper end at printing part, fan a all fixes the outer wall top at bent type baffle with fan b's bottom, the dust absorption mouth sets up the outer wall left side bottom at bent type frame, fan b sets up the inner wall top right side below at bent type frame.

Preferably, the printing part includes the side fixed plate, the quantity that the side fixed plate set up is two, two the bottom of side fixed plate all with the outer wall top front and back side's of base right side fixed connection, two relative one side outer walls of side fixed plate rotate and are connected with the printing cylinder.

Preferably, the outer wall of one side of each of the two side fixing plates opposite to each other is rotatably connected with an auxiliary roller below the printing roller, the front end of the outer wall of each side fixing plate is fixed with a servo motor a at a position corresponding to the printing roller, and the rear end of the outer wall of each servo motor a is fixedly connected with the front end of the outer wall of the printing roller through an output shaft.

Preferably, the moving part comprises two servo motors b, the number of the servo motors b is two, the bottom ends of the outer walls of the two servo motors b are fixedly connected with the top ends of the outer walls of the two bent frames respectively, the top ends of the inner walls of the bent frames are connected with a screw rod in a rotating mode, the bottom ends of the outer walls of the screw rods are connected with the top end of the outer wall of the base in a rotating mode, and the bottom ends of the servo motors b are fixedly connected with the top end of the outer wall of the screw rod through output shafts.

Preferably, two the inner wall of bent type frame all sets up at the screw thread slider, two the upper and lower lateral outer wall of screw thread slider respectively with the outer wall threaded connection of two screw rods, the relative one side outer wall of screw thread slider is fixed with the backup pad, the outer wall both sides of screw thread slider all are fixed with limit slider, the inner wall both sides of bent type frame all with limit slider sliding connection, be fixed with the bracing piece before the outer wall of backup pad, the one end that the backup pad was kept away from to the bracing piece all with the outer wall left side upper portion fixed connection of bent type baffle.

Preferably, the bottom end of the outer wall of the fan a is fixed to the left side of the top end of the outer wall of the curved baffle, the bottom end of the outer wall of the fan b is fixed to the right side of the top end of the outer wall of the curved baffle, a feeding opening is formed in the left side of the outer wall of the curved baffle, a dust collection opening is formed in the upper portion of the feeding opening, the right side of the outer wall of the dust collection opening is fixedly connected with the left side of the outer wall of the curved baffle through a fixing rod a, and the fan a is fixedly communicated with the top end of the inner wall of the dust collection opening through a dust collection pipe.

Preferably, a fixing rod b is fixed to the top end of the outer wall of the air suction port, the upper end of the outer wall of the fixing rod b is fixedly connected with the right side of the top end of the inner wall of the curved baffle, the fan b is fixedly communicated with the right side of the inner wall of the air suction port through an air suction pipe, and the air suction port is formed in the right side of the outer wall of the printing roller.

Preferably, a filter box a is fixed at the front end of the top end of the outer wall of the supporting plate, an air jet port a is fixed at the right end of the inner wall of the filter box a, the fan a is communicated with the top end of the inner wall of the air jet port a through a dust conveying pipe, a filter bag is arranged on the inner wall of the filter box a and on the left side of the air jet port a, and the air jet port a and the filter bag are matched for use.

Preferably, the outer wall top of backup pad and the rear end that is located rose box a are fixed with rose box b, rose box b's inner wall right-hand member is fixed with air jet b, fan b passes through the inner wall top intercommunication of gas-supply pipe with air jet b, rose box b's inner wall and the left side sliding connection that is located air jet b have filter pulp and active carbon plate, the active carbon plate sets up in the outer wall left side of filter pulp.

The beneficial effects of the utility model are that:

in the utility model, before printing, the fan a can absorb the dust and paper scraps stuck at the printing end of the paper to be printed through the dust absorption pipe by the dust absorption port, and the dust and paper scraps are conveyed into the filter box a through the dust conveying pipe by air, and the filter box a can filter and remove the dust and paper scraps through the filter bag;

the utility model discloses in, treat the printing paper in the printing process, the fan b accessible breathing pipe of setting makes the induction port absorb the printing ink granule that the printing produced to carry the printing ink granule to the rose box b in through the gas-supply pipe, the rose box b of setting can filter the printing ink granule through filter pulp and active carbon plate and get rid of, and is known from the above-mentioned mode the utility model discloses can effectively treat the paper scrap dust that printing paper pasted and stays and get rid of the printing ink granule that produces when treating the printing paper printing, thereby avoid the paper scrap dust to cause the damage to the printing cylinder, also can avoid the printing ink granule to cause harm to workman's healthy.

Drawings

Fig. 1 is a schematic view of the overall structure of the utility model in the front view direction;

FIG. 2 is a schematic view of the printing device of FIG. 1 with the printing element removed according to the present invention;

FIG. 3 is a schematic view of a part of the structure of the printing component of the present invention in a right side view;

FIG. 4 is a schematic view of a side view of a moving part according to the present invention;

FIG. 5 is a schematic cross-sectional view of the filter box a in the front view direction of the present invention;

FIG. 6 is a schematic cross-sectional view of the filter box b in the front view direction of the present invention;

FIG. 7 is a schematic view of the dust suction port in the bottom view direction;

fig. 8 is a schematic structural view of the middle curved baffle of the present invention.

In the figure: 100. a base; 200. a side fixing plate; 210. a servo motor a; 220. a printing cylinder; 230. a secondary roll; 300. a curved frame; 310. a servo motor b; 311. a screw; 320. a threaded slider; 321. a support plate; 330. a curved baffle; 340. a fan a; 341. a dust suction port; 350. a fan b; 351. an air suction port; 360. a filter box a; 361. an air jet port a; 362. filtering the bags; 370. a filter box b; 371. an air jet b; 372. filtering cotton; 373. an activated carbon plate.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Referring to fig. 1-8, the utility model provides a safety device for printing machine, including base 100, still include the printing part, curved type frame 300, the moving part, curved type baffle 330, fan a340, dust absorption mouth 341, fan b350 and induction port 351, the outer wall bottom of printing part and the outer wall top right side fixed connection of base 100, the quantity that curved type frame 300 set up is two, the outer wall bottom of curved type frame 300 and the outer wall top front and back side of base 100 just are located the outer wall left side fixed connection of printing part, logical groove has been seted up to the front and back side outer wall of curved type frame 300 that sets up, the front and back end of moving part respectively with the inner wall sliding connection of curved type frame 300, curved type baffle 330 sets up in the outer wall upper end of printing part, curved type baffle 330 that sets up is for carrying out the in-process of printing at the printing part and sheltering from the printing part, avoid staff's finger to contact with printing cylinder 220, fan a340 all fixes the outer wall top at curved type baffle 330 with the bottom of fan b350, dust absorption mouth 341 sets up in the left side bottom of curved type frame 300, fan b sets up the right side inner wall below.

The printing component comprises two side fixing plates 200, the bottom ends of the two side fixing plates 200 are fixedly connected with the right sides of the front side and the rear side of the top end of the outer wall of the base 100, the two side fixing plates 200 are arranged for installing two ends of a printing cylinder 220 and a secondary roller 230, the outer wall of one opposite side of the two side fixing plates 200 is rotatably connected with a printing cylinder 220, the outer wall of one opposite side of the two side fixing plates 200 is rotatably connected with a secondary roller 230 below the printing cylinder 220, the printing cylinder 220 is arranged for printing passing printing paper, the outer wall of the printing cylinder 220 is printed with patterns, the outer wall of the printing cylinder 220 can print the printing paper by matching ink, the secondary roller 230 is arranged for assisting the paper to be printed to pass through a gap, a servo motor a210 is fixed at the front end of the outer wall of the front end fixing plate 200 and at the position corresponding to the printing cylinder 220, the rear end of the outer wall of the servo motor a210 is connected with the front end of the outer wall of the printing cylinder 220 through an output shaft, and the servo motor 210 a is arranged for driving the printing cylinder 220 to rotate through the output shaft after being electrified so that the printing cylinder 220 can be fixed with the printing paper;

the moving parts comprise servo motors b310, the number of the servo motors b310 is two, the moving parts are arranged to drive the curved baffle 330 to move up and down, the bottom ends of the outer walls of the servo motors b310 are respectively and fixedly connected with the top ends of the outer walls of the two curved frames 300, the top ends of the inner walls of the curved frames 300 are respectively and rotatably connected with screw rods 311, the bottom ends of the outer walls of the two screw rods 311 are respectively and rotatably connected with the top end of the outer wall of the base 100, the bottom ends of the servo motors b310 are fixedly connected with the top ends of the outer walls of the screw rods 311 through output shafts, the two servo motors b310 can be started and closed through the same control switch, the servo motors b310 can drive the screw rods 311 to rotate in the forward and reverse directions through the output shafts after being electrified, the inner walls of the two curved frames 300 are respectively arranged on the threaded sliders 320, and the outer walls of the upper and the lower sides of the two threaded sliders 320 are respectively and in threaded connection with the outer walls of the two screw rods 311, the screw thread slider 320 is provided with a screw thread hole at the joint with the screw 311, the screw thread slider 320 can be in threaded connection with the outer wall of the screw 311 through the screw thread hole, so that the screw 311 can drive the screw thread slider 320 to move up and down at the inner wall of the curved frame 300 when rotating, the outer wall of one side opposite to the screw thread slider 320 is fixed with a support plate 321, both sides of the outer wall of the screw thread slider 320 are fixed with limit sliders, both sides of the inner wall of the curved frame 300 are in sliding connection with the limit sliders, both sides of the inner wall of the curved frame 300 are provided with limit chutes at the joints with the limit sliders, the limit sliders and the limit chutes play a role in guiding the movement of the screw thread slider 320, a support rod is fixed in front of the outer wall of the support plate 321, one end of the support rod far away from the support plate 321 is fixedly connected with the upper portion of the left side of the outer wall of the curved baffle 330, the support rod is arranged to connect the support plate 321 with the curved baffle 330, so that the screw slider 320 can drive the curved baffle 330 to move together when driving the support plate 321 to move;

the bottom end of the outer wall of the fan a340 is fixed on the left side of the top end of the outer wall of the curved baffle 330, the bottom end of the outer wall of the fan b350 is fixed on the right side of the top end of the outer wall of the curved baffle 330, the fan a340 is arranged for removing dust and paper scraps adhered on the surface of paper to be printed before the paper to be printed is printed, the left side of the outer wall of the curved baffle 330 is provided with a feeding port, the feeding port arranged on the curved frame 300 is positioned at the same horizontal position as a gap formed by the printing roller 220 and the auxiliary roller 230, a worker can convey paper to be printed to a gap between the printing roller 220 and the auxiliary roller 230 through a feeding port to print, a dust suction port 341 is arranged above the feeding port, a supporting block is fixed at the side end of the outer wall of the arranged curved baffle 330 below the feeding port, the supporting block and the dust suction port 341 are in the same vertical direction, the right side of the outer wall of the dust suction port 341 is fixedly connected with the left side of the outer wall of the curved baffle 330 through a fixing rod a, a fan a340 is fixedly communicated with the top end of the inner wall of the dust suction port 341 through a dust suction pipe, the arranged fan a340 can use the dust suction pipe to enable the dust suction port 341 to remove paper scraps after being electrified and started, a fixing rod b is fixed at the top end of the outer wall of the air suction port 351, the upper end of the outer wall of the fixing rod b is fixedly connected with the right side of the top end of the inner wall of the curved baffle 330, and the fixing rod b is arranged to fixedly connect the air suction port 351 with the top end of the inner wall of the curved baffle 330, the air suction opening 351 is arranged at the right side of the printing position of the printing roller 220, the fan b350 is fixedly communicated with the right side of the inner wall of the air suction opening 351 through an air suction pipe, the air suction opening 351 is arranged at the right side of the outer wall of the printing roller 220, when the fan b350 is electrified, the air suction pipe can suck air from the air suction port 351, and the arranged air suction port 351 can suck ink particles generated by printing;

the front end of the top end of the outer wall of the supporting plate 321 is fixed with a filter box a360, the filter box a360 is arranged for filtering dust and paper scraps sucked by the fan a340, the right end of the inner wall of the filter box a360 is fixed with an air jet port a361, the fan a340 is communicated with the top end of the inner wall of the air jet port a361 through a dust conveying pipe, the inner wall of the filter box a360 and the left side of the air jet port a361 are provided with a filter bag 362, the air jet port a361 and the filter bag 362 are matched for use, the arranged fan a340 can convey air sucking the dust and paper scraps to the air jet port a361 through the dust conveying pipe, the air jet port a361 can jet the air mixed with the dust and paper scraps into the filter bag 362, the filter bag 362 can filter mixed paper scraps and dust, the filtered air can be discharged through an exhaust groove formed in the left side of the outer wall of the filter box a360, the filter box b370 is fixed at the top end of the outer wall of the support plate 321 and at the rear end of the filter box a360, the air nozzle b371 is fixed at the right end of the inner wall of the filter box b370, the fan b350 is communicated with the top end of the inner wall of the air nozzle b371 through an air pipe, the filter cotton 372 and the activated carbon plate 373 are connected to the inner wall of the filter box b370 and at the left side of the air nozzle b371 in a sliding manner, the activated carbon plate 373 is arranged at the left side of the outer wall of the filter cotton 372, and a filter box b370 is provided to filter the ink particles sucked by the blower b350, the fan b350 can convey the sucked ink particles to the air jet port b371 through an air conveying pipe, the air jet b371 can eject the air mixed with the sucked ink particles to the filter cotton 372 and the activated carbon plate 373, the filter cotton 372 can adsorb the ink particles, and two groups of activated carbon plates 373 are provided to adsorb and filter the pungent odor generated by the ink, the filtered air can be discharged through an exhaust groove arranged on the left side of the outer wall of the filter box b 370;

the utility model discloses a use as follows: firstly, a worker can firstly control a switch to enable a servo motor b310 to be electrified to drive a screw 311 to rotate forwards, when the screw 311 rotates forwards, a threaded slider 320 can drive a supporting plate 321 and a curved baffle 330 to move downwards through the matching action of threaded connection, so that the curved baffle 330 can protect the left side and the top end of the outer wall of a printing component, after the curved baffle 330 is moved, a set feeding port and an air suction port 351 are respectively aligned with a printing position, then the worker can electrifyingly start a servo motor a210, so that the servo motor a210 can drive the printing roller 220 to rotate, then the worker can add printing ink to the outer wall of the printing roller 220, then the worker holds the paper to be printed by hand, the paper to be printed is plugged to the gap between the outer wall of the printing roller 220 and an auxiliary roller 230 through the feeding port, the rotating printing roller 220 can match the auxiliary roller 230 to convey the paper to be printed, the set printing roller 220 can suck the top end of the outer wall of the paper to be printed by the air suction port of an air suction filter bag 340 a which is arranged at the air suction port, and the air suction port which is arranged to suck dust collected and suck the dust collected from the dust suction pipe 350 a of the dust suction pipe, and dust suction pipe 350 which is arranged at the air suction pipe, and dust suction pipe which is arranged at the air suction pipe 350 a, so that dust suction pipe is arranged at the dust suction pipe 350, and dust suction pipe is arranged at the dust suction pipe arranged at the left side of the dust suction pipe, and suction pipe, when the dust suction pipe is arranged at the dust suction pipe, and suction pipe 350, then the fan b350 can convey the sucked ink particles to the air jet port b371 through an air pipe, the arranged air jet port b371 can spray air mixed with the sucked ink particles to the filter cotton 372 and the activated carbon plate 373, the arranged filter cotton 372 can adsorb the ink particles, the two groups of activated carbon plates 373 can adsorb and filter pungent smells, the filtered air can be discharged through an air discharge groove formed in the left side of the outer wall of the filter box b370, and then dust paper scraps stuck on paper to be printed and the ink particles generated in printing can be removed, and after the filter box a360 and the filter box b370 are used for a long time, a worker can respectively clean or replace the filter bag 362, the filter cotton 372 and the activated carbon plates 373 through a box door hinged to the front ends of the outer walls of the filter box a360 and the filter box b 370.

The above description is only a preferred embodiment of the present invention, and any person skilled in the art may modify the present invention or modify it into an equivalent technical solution by using the technical solutions described above. Therefore, any simple modifications or equivalent replacements made according to the technical solution of the present invention belong to the scope of the claimed invention as far as possible.

Claims (9)

1. Safety device for printing machine, including base (100), its characterized in that: the printing device is characterized by further comprising a printing part, a curved frame (300), a moving part, a curved baffle (330), a fan a (340), a dust suction port (341), a fan b (350) and an air suction port (351), wherein the bottom end of the outer wall of the printing part is fixedly connected with the right side of the top end of the outer wall of the base (100), the number of the curved frame (300) is two, the bottom end of the outer wall of the curved frame (300) is fixedly connected with the front side and the rear side of the top end of the outer wall of the base (100) and is located on the left side of the outer wall of the printing part, the front end and the rear end of the moving part are respectively connected with the inner wall of the curved frame (300) in a sliding mode, the curved baffle (330) is arranged at the upper end of the outer wall of the printing part, the bottom ends of the fan a (340) and the fan b (350) are fixed at the top end of the outer wall of the curved baffle (330), the dust suction port (341) is arranged at the bottom of the left side of the outer wall of the curved frame (300), and the fan b (350) is arranged below the right side of the top end of the inner wall of the curved frame (300).

2. A safety guard for a printing press according to claim 1, wherein: the printing part includes side fixed plate (200), the quantity that side fixed plate (200) set up is two, two the right side fixed connection of side around the bottom of side fixed plate (200) all with the outer wall top of base (100), and two relative one side outer walls of side fixed plate (200) rotate and are connected with printing cylinder (220).

3. A safety shield for a printing press as defined in claim 2, wherein: the outer wall of one side opposite to the two side fixing plates (200) is located below the printing roller (220) and is rotatably connected with an auxiliary roller (230), the front end of the outer wall of the side fixing plate (200) is fixed with a servo motor a (210) at the position corresponding to the printing roller (220), and the rear end of the outer wall of the servo motor a (210) is fixedly connected with the front end of the outer wall of the printing roller (220) through an output shaft.

4. A safety shield for a printing press as defined in claim 2, wherein: the movable part includes servo motor b (310), the quantity that servo motor b (310) set up is two, the outer wall bottom of servo motor b (310) respectively with the outer wall top fixed connection of two bent type framves (300), bent type frame (300) inner wall top all rotates and is connected with screw rod (311), two the outer wall bottom of screw rod (311) all rotates with the outer wall top of base (100) to be connected, the outer wall top fixed connection of output shaft and screw rod (311) is passed through to the bottom of servo motor b (310).

5. A safety guard for a printing press according to claim 4, wherein: two the inner wall of bent type frame (300) all sets up at screw thread slider (320), two the upper and lower outside wall of screw thread slider (320) respectively with the outer wall threaded connection of two screw rods (311), the relative one side outer wall of screw thread slider (320) is fixed with backup pad (321), the outer wall both sides of screw thread slider (320) all are fixed with limit slide, the inner wall both sides of bent type frame (300) all with limit slide sliding connection, be fixed with the bracing piece before the outer wall of backup pad (321), the bracing piece is kept away from the one end of backup pad (321) and all with the outer wall left side upper portion fixed connection of bent type baffle (330).

6. A safety shield for a printing press as defined in claim 5, wherein: the outer wall bottom mounting of fan a (340) is on the outer wall top left side of bent type baffle (330), the outer wall bottom mounting of fan b (350) is on the outer wall top right side of bent type baffle (330), the pay-off mouth has been seted up on the outer wall left side of bent type baffle (330), dust absorption mouth (341) set up the top at the pay-off mouth, the outer wall right side of dust absorption mouth (341) is through the outer wall left side fixed connection of dead lever a with bent type baffle (330), fan a (340) is through the fixed intercommunication in inner wall top of dust absorption pipe with dust absorption mouth (341).

7. A safety guard for a printing press according to claim 6, wherein: the outer wall top of induction port (351) is fixed with dead lever b, the outer wall upper end of dead lever b and the inner wall top right side fixed connection of curved baffle (330), fan b (350) are through the fixed intercommunication in inner wall right side of breathing pipe with induction port (351), induction port (351) set up the outer wall right side at printing cylinder (220).

8. A safety guard for a printing press according to claim 7, wherein: the utility model discloses a dust collection device, including backup pad (321), the outer wall top front end of backup pad (321) is fixed with rose box a (360), the inner wall right-hand member of rose box a (360) is fixed with air jet a (361), fan a (340) are through the inner wall top intercommunication of dust conveying pipe with air jet a (361), the inner wall of rose box a (360) and the left side that is located air jet a (361) are provided with filter bag (362), air jet a (361) and filter bag (362) cooperation are used.

9. A safety guard for a printing press according to claim 8, wherein: the outer wall top of backup pad (321) just is located the rear end that rose box a (360) and is fixed with rose box b (370), the inner wall right-hand member of rose box b (370) is fixed with air jet b (371), fan b (350) are through the inner wall top intercommunication of gas-supply pipe with air jet b (371), the inner wall of rose box b (370) just is located the left side sliding connection of air jet b (371) and has filter pulp (372) and active carbon board (373), active carbon board (373) set up in the outer wall left side of filter pulp (372).

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