Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned multicolour press of prior art in printing process, vacuum suction system is difficult to realization and incessantly stock is kept to vacuum suction state defect, and a kind of vacuum suction system that can keep to stock the multicolour press of vacuum suction state in printing process is provided.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of vacuum suction system of multicolour press, comprise moving runner, be looped around conveyer belt on described moving runner, several be arranged on described conveyer belt and for adsorb stock vacuum suction platform, connect pipeline and the vavuum pump of described several vacuum suction platforms; Described pipeline is the circulating line that head and the tail communicate, and described pipe ring is on described conveyer belt; Described vacuum suction system also comprises and is arranged at least two closing devices of described moving runner one end face, multiple the first valve and Multi-channel rotating joint of being connected on described conveyer belt and with described pipeline of being evenly arranged on; Wherein, each described closing device is connected with described vavuum pump by described Multi-channel rotating joint respectively;
Adjacent two described the first valves equate along the distance between described moving runner circumference along the distance between described conveyer belt and adjacent two described closing devices;
The spool that described at least one, closing device promotes the first valve corresponding thereto makes to form the passage of supplied gas circulation between the two, and then described vavuum pump is communicated with described vacuum suction platform realization.
In the vacuum suction system of multicolour press of the present invention, described vacuum suction system also comprises cam;
The protuberance of described cam is near a side of described moving runner and described conveyer belt contact site; The protuberance sliding-contact of closing device and described cam described at least one;
Described closing device during with the protuberance sliding-contact of described cam can promote the spool of described the first valve, makes to form between described closing device and described the first valve the passage of supplied gas circulation; Described closing device during with the non-protruding portion sliding-contact of described cam is in closed condition.
In the vacuum suction system of multicolour press of the present invention, described vacuum suction system also comprises fixed axis; Described moving runner is installed in rotation on described fixed axis; Described cam is fixedly mounted on described fixed axis.
In the vacuum suction system of multicolour press of the present invention, described closing device comprises the motion bar that is connected and is fixedly mounted on the second valve of described moving runner one end face and is connected with the spool of described second valve with described vavuum pump; Described motion bar can contact with described cam slide, and controls described second valve and open or close;
When the protuberance sliding-contact of one end of described motion bar and described cam, the spool that the other end of described motion bar promotes described the first valve makes to form between described second valve and described the first valve the passage of supplied gas circulation.
In the vacuum suction system of multicolour press of the present invention, described closing device also comprises elastic reset part; The movable end of described elastic reset part is connected with described motion bar, and the stiff end of described elastic reset part is connected with described moving runner.
In the vacuum suction system of multicolour press of the present invention, described elastic reset part is spring.
In the vacuum suction system of multicolour press of the present invention, one end that described motion bar promotes the spool of described the first valve is provided with seal.
In the vacuum suction system of multicolour press of the present invention, described motion bar is provided with bearing with one end that described cam slide contacts.
In the vacuum suction system of multicolour press of the present invention, described moving runner is sprocket wheel; Described conveyer belt is and the chain of described sprocket engagement transmission.
Implement the vacuum suction system of multicolour press of the present invention, there is following beneficial effect: the vacuum suction system of multicolour press adopts the structures such as closing device and the first valve, multicolour press is in printing process, and vacuum suction system can be realized stock is kept to continuous vacuum suction state.
Detailed description of the invention
Understand for technical characterictic of the present invention, object and effect being had more clearly, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
As shown in Figure 1 and Figure 2, preferred embodiment of the present invention provides a kind of vacuum suction system of multicolour press, and it comprises moving runner 1, conveyer belt 2, closing device 3, the first valve 4, vacuum suction platform (not shown), pipeline (not shown), vavuum pump (not shown) and Multi-channel rotating joint.Conveyer belt 2 is looped around on moving runner 1, can realize Synchronous Transmission with this moving runner 1.Vacuum suction platform is provided with several, and each vacuum suction platform is arranged on conveyer belt 2 equably.Multicolour press is in printing work process, and vacuum suction platform can be used for adsorbing stock.Can, according to the printing chromatic number of multicolour press, select the vacuum suction platform of varying number.Each vacuum suction platform connects by pipeline.This pipeline is the circulating line that head and the tail communicate, and this pipe ring is on conveyer belt 2, can be synchronized with the movement with driving-belt 2.The first valve 4 is provided with multiple, and it is arranged on conveyer belt 2 equably, and each the first valve 4 is connected with this pipeline respectively.Be understandable that, as long as there is first valve 4 to be connected with vavuum pump in multiple the first valve 4, make vavuum pump realize and being communicated with vacuum suction platform, can realize vacuum suction platform absorption stock.
Closing device 3 is at least provided with two, and it is arranged on an end face of moving runner 1 equably, and this closing device 3 also can produce motion along with the rotation of moving runner 1.Each closing device 3 is connected with vavuum pump respectively.In this embodiment, each closing device 3 is connected with vavuum pump by Multi-channel rotating joint respectively.Multi-channel rotating joint adopts common Multi-channel rotating joint in prior art, and the quantity of its joint quantity and closing device 3 matches.Each closing device 3 is connected with vavuum pump by Multi-channel rotating joint, because the joint being connected with each closing device 3 can keep being connected with vavuum pump in rotary course, when vavuum pump is fixedly installed, closing device 3 can keep and being connected of vavuum pump in rotation process.
The position relationship of the first valve 4 and closing device 3 is: adjacent two the first valves 4 equate along the distance between moving runner 1 circumference along the distance between conveyer belt 2 and adjacent two closing devices 3.By this position relationship, to ensure that moving runner 1 and conveyer belt 2 are in motion process, closing device 3 can contact with the first valve 4.
Multicolour press is in printing work process, and at least one closing device 3 can promote the spool of the first valve 4 corresponding thereto, makes to form between this closing device 3 and this first valve 4 passage of supplied gas circulation.Because vavuum pump is connected with closing device 3, now, vavuum pump is realized and being communicated with vacuum suction platform by closing device 3, the first valve 4 successively, when vavuum pump running, can make vacuum suction platform keep the state of absorption stock.
Particularly, described vacuum suction system also comprises cam 5 and fixed axis 6.Moving runner 1 is installed in rotation on fixed axis 6, and cam 5 is fixedly mounted on fixed axis 6.Be understandable that, cam 5 can not rotate along with the rotation of moving runner 1.The protuberance of this cam 5 is the side with conveyer belt 2 contacts site near moving runner 1, and correspondingly, the non-protruding portion of cam 5 is positioned at a side at moving runner 1 and conveyer belt 2 noncontact positions.In motion process, the protuberance sliding-contact of at least one closing device 3 and cam 5.In this embodiment, the curvature of the protuberance of cam 5 equates, the curvature at noncontact position is equal equally, and protuberance and non-protruding portion carry out transition smoothly, the stationarity when ensureing closing device 3 and cam 5 sliding-contact.Be understandable that, this cam 5 can adopt recessed wheel to replace, as long as meet the side of this recessed protuberance of taking turns near moving runner 1 and conveyer belt 2 contacts site.In other embodiment, cam 5 also can have other alternative structure.
When the protuberance sliding-contact of one end of closing device 3 and cam 5, the spool that its other end promotes the first valve 4 makes to form the passage that supplied gas circulates between closing device 3 and the first valve 4, when vavuum pump running, can make vacuum suction platform keep the state of absorption stock.When the non-protruding portion sliding-contact of closing device 3 and cam 5, closing device 3 and the first valve 4 disengage, and closing device 3 is in closed condition, to ensure the normal operation of vavuum pump.
Further, in the present embodiment, moving runner 1 is sprocket wheel.Conveyer belt 2 is and the chain of this sprocket engagement transmission.Adopt chain transmission to there is the advantages such as gearratio is accurate, reliable operation.
Closing device 3 comprises second valve 31, motion bar 32 and elastic reset part (not shown).Second valve 31 is connected with vavuum pump and is fixedly mounted on moving runner 1 end face.Motion bar 32 is connected with the spool of second valve 31.Multicolour press in printing work process, motion bar 32 can with cam 5 sliding-contacts, and control second valve 31 and open or close.When the protuberance sliding-contact of one end of motion bar 32 and cam 5, the other end of motion bar 32 promotes the spool of the first valve 4.The stiff end of elastic reset part is connected with moving runner 1, and the movable end of elastic reset part is connected with motion bar 32.In this embodiment, elastic reset part is spring.Be understandable that, elastic reset part also can adopt other can realize automatically reset structure.
In the present embodiment, closing device 3 is provided with eight, and it is arranged on the end face of moving runner 1 equably.The quantity of the first valve 4 designs according to the size of conveyer belt 2, and ensures that adjacent two the first valves 4 equate along the distance between moving runner 1 circumference along the distance between conveyer belt 2 and adjacent two closing devices 3.
Multicolour press is in printing work process, in the time that certain closing device 3 turns to the protuberance of cam 5 from the non-protruding portion of cam 5, motion bar 32 drives the valve core movement of second valve 31 under the effect of cam 5, second valve 31 is opened, meanwhile, motion bar 32 promotes the spool of the first valve 4, makes to form between the first valve 4 and second valve 31 passage of supplied gas circulation.Now, vavuum pump is realized and being communicated with vacuum suction platform by second valve 31, the first valve 4 successively, when vavuum pump running, can make vacuum suction platform keep the state of absorption stock.In the time that this closing device 3 turns to the non-protruding portion of cam 5 from the protuberance of cam 5, under the effect of elastic reset part, motion bar 32 and the first valve 4 disengage, and now, the spool of the spool of the first valve 4 and second valve 31 automatically resets to keep closed condition.In the time that closing device 3 contacts with the protuberance of cam 5 again, closing device 3 contacts with another first valve 4, with this reciprocation cycle.In this printing work process, have at least a closing device 3 to be connected with the first valve 4, vavuum pump can be connected with vacuum suction platform, to ensure the state of vacuum suction platform absorption stock.Be understandable that, the quantity of closing device 3 also can have other to select, and when the quantity of closing device 3 is more, the quantity of the closing device 3 being connected with the first valve 4 is also more, and the stability of the absorption stock of vacuum suction platform is higher.
In the present embodiment, the sealing property while being connected with second valve 31 in order to improve the first valve 4, one end that motion bar 32 promotes the spool of the first valve 4 is provided with seal 33.By the structure of seal 33 is set, the sealing property can improve the first valve 4 and be connected with second valve 31 time.
In the present embodiment, the resistance of motion when reducing motion bar 32 with cam 5 sliding-contact, motion bar 32 is provided with bearing 34 with one end of cam 5 sliding-contacts.By the structure of bearing 34 is set, while making the sliding-contact of motion bar 32 and cam 5 sliding-contacts, frictional force is little, moves more smooth and easy.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; instead of restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not departing from the scope situation that aim of the present invention and claim protect, also can make a lot of forms, within these all belong to protection of the present invention.