CN216231209U - A bellows and a flattening device used in a printing paper flattening device - Google Patents

Abstract

The utility model provides a wind box and a flattening device applied to a printing paper flattening device, wherein the wind box comprises a box body and a box cover which are connected with each other; an air inlet is formed in one side, away from the box cover, of the box body and is connected with a first air storage cavity, and the first air storage cavity is formed in the box body; the box body is provided with an air outlet which is connected with a second air storage cavity, and the second air storage cavity is arranged inside the box body; the first air storage cavity is connected with the second air storage cavity through a first channel; the air outlet comprises a first guide groove and a second guide groove which are arranged in parallel; a first exhaust hole is formed in the first diversion trench; the inside second exhaust hole that is provided with of second guiding gutter, the diameter in first exhaust hole is less than the diameter in second exhaust hole. The wind box is small in section size, regular in shape, small in overall structure size of the flattening device, high in space adaptability, simple in field arrangement and adjustment and stable in flattening effect on printing paper.

Description

A bellows and a flattening device used in a printing paper flattening device

technical field

The utility model relates to the technical field of printing product quality detection, in particular to a bellows and a flattening device applied to a paper flattening device for printed products.

Background technique

With the continuous development of the printing industry, the requirements for the quality of printed products are getting higher and higher. In the printing industry, a visual inspection system is generally used to detect the quality of printed products in real time. When using a visual inspection system to inspect the quality of printed products, it is necessary to ensure the stable movement of the printed products. Printing products generally refer to printing paper. The movement of printing paper is controlled by the printing unit to grip the paper head, thereby driving the movement of printing paper. When the gripper holds the paper head on the roller and transfers between the rollers, the printing paper will be affected by air resistance, centrifugal force, paper head driving force, internal stress of the printing paper itself, etc. Irregular and unstable movements such as side warping and left and right yaw further lead to the instability of the printed paper, that is, there is local deformation of the printed paper. The unstable state of the printing paper, that is, the local deformation of the printing paper, will seriously affect the imaging quality of the visual inspection system, which in turn affects the detection accuracy of the printing paper defect by the visual inspection system.

In the prior art, a flattening system is generally used to flatten the locally deformed printing paper, so as to ensure that the imaging quality of the visual inspection system is not affected by the local deformation of the printing paper. As shown in FIG. 1 , the flattening system specifically includes: a blowing flattening device, an air filter, a turbo blower and an air duct. When the offset printing press is working, the impression cylinder will rotate counterclockwise, and the printed product, that is, the printing paper, is fixed on the impression cylinder at one end, and the other end is in a free state. Under the action of centrifugal force, the printed product, that is, the printing paper, will deviate from the impression cylinder. s surface. Install the blowing and flattening device near the impression cylinder of the offset printing press. When the offset printing press is running normally, the turbo fan starts to work, and the air enters the turbo fan through the air filter, and the strong airflow formed by it passes through the air duct a and the air duct. b Enter both ends of the blowing and flattening device, and then blow out from the panel of the blowing and flattening device. The strong airflow acts on the surface of the printed product, so that the printed product can be closely attached to the surface of the impression cylinder under the action of the strong airflow, and the printing process is completed. The product, the flattening of the printed paper.

However, the diameter of the air duct used in the existing flattening system is large, resulting in a large overall structural size of the flattening system, difficult on-site installation and layout, and poor spatial adaptability.

Utility model content

The utility model provides an air box and a flattening device applied in a printed matter paper flattening device, so as to solve the problem that the diameter of the air duct used in the prior art is large, resulting in a large overall structure size of the flattening system, and the installation on site is difficult. The layout is difficult and the space adaptability is poor.

In one aspect, the present invention provides a bellows used in a printing paper flattening device, wherein the bellows is designed as a rectangular multi-cavity structure, comprising: a box body and a box cover that are connected to each other;

Wherein, the side of the box body away from the box cover is provided with at least two air inlets, at least two of the air inlets are arranged on the same central axis, and both are connected with the first air storage cavity. The first air storage cavity is arranged inside the box body;

The box body is provided with an air outlet, and the air outlet is arranged at one end away from the at least two air inlets, and the air outlet is connected with the second air storage cavity, and the second air storage cavity is arranged at the end. the inside of the box;

The first air storage cavity is connected with the second air storage cavity through a first channel arranged inside the box body;

The air outlet is arranged on a side away from the first channel, the air outlet includes a first guide groove and a second guide groove, and the first guide groove and the second guide groove are parallel to each other set up;

At least two first exhaust holes are arranged inside the first guide groove, and each of the first exhaust holes communicates with each other;

At least two second exhaust holes are arranged inside the second diversion groove, each of the second exhaust holes is communicated with each other, and the diameter of the first exhaust hole is smaller than that of the second exhaust hole diameter of.

In the above technical scheme, the first vent hole and the second vent hole are designed with different diameters, which can play different roles in the flattening of the printing paper, and the second vent hole is mainly used to resist the upward warping of the printing paper. Curved, the first air vent is used to smooth the printed paper. In addition, the first guide groove and the second guide groove are both designed as long and narrow slits, which can effectively suppress the air flow jetted forward and backward.

In a preferred embodiment of the present invention, a support surface structure formed by bonding with an adhesive is further included between the first air storage cavity and the second air storage cavity; the support surface structure is arranged on the The inside of the box body and the box cover is arranged between the first air storage cavity and the second air storage cavity, and is used to cut off a plurality of the first passages to form an intermittent structure.

In a preferred embodiment of the present invention, at least two of the air inlets are evenly distributed in the area of the first air storage cavity, and the distances between each of the air inlets are equal.

In a preferred embodiment of the present invention, at least two of the first exhaust holes are evenly distributed inside the first guide groove, and the distances between each of the first exhaust holes are equal.

In a preferred embodiment of the present invention, at least two second exhaust holes are evenly distributed inside the second guide groove, and the distances between the second exhaust holes are equal.

On the other hand, the utility model also provides a flattening device, the flattening device includes: a wind box, an air source device and a main air intake pipe, one end of the main air intake pipe is respectively connected to the At least two air inlets of the air box, and the other end of the main air inlet pipe is connected to the air source device.

In the above technical solution, the quick-insertion and diameter-reducing equipment can adopt the quick-insertion and diameter-reducing tee or the quick-insertion and diameter-reducing four-way, so as to convert a main air intake pipe into a plurality of secondary air intake pipes to connect a plurality of air inlets respectively.

In a preferred embodiment of the present invention, the flattening device further comprises a roller, and the wind box is arranged on the outer side of the roller and is arranged parallel to the camera shooting line.

In a preferred embodiment of the present invention, the wind box is installed on one side of the printing paper, and the distance between the wind box and the printing paper is 6mm-15mm, and the printing paper is attached to the roller.

In a preferred embodiment of the present invention, the distance between the camera shooting line and the wind box is set to 2mm-10mm.

In a preferred embodiment of the present invention, the air source equipment adopts an air compressor capable of providing compressed air.

In a preferred embodiment of the present invention, the main air intake pipe includes a hard pipe and a flexible tube, and the hard pipe is used in a flattening device with a linear distance between the air source equipment and the wind box greater than 10m; The hose is used in a flattening device with a linear distance between the air source equipment and the wind box not greater than 10m.

Compared with the prior art, the bellows and the flattening device used in the flattening device for printed matter paper provided by the utility model have the following beneficial effects:

(1) The bellows of the present invention is designed as a multi-chamber split design structure, which can uniformly press the gas entering the inside of the bellows through the first air storage cavity and the second air storage cavity inside the bellows, so that the The gas keeps the same pressure in the length direction of the bellows, so that the airflow pressure near different exhaust holes (including the first exhaust hole and the second exhaust hole) is basically the same, ensuring the stability of the exhaust airflow from different exhaust holes, and further Guarantees a stable flattening effect on the printed paper.

(2) An intermittent structure is set between the first air storage cavity and the second air storage cavity of the present invention, which can greatly reduce the gas pressure area that the box cover bears, thereby ensuring that the box cover will not generate a large amount of pressure. Compression deformation.

(3) The connection between the box body and the cover of the bellows of the present invention adopts the combination of glue and screw connection, which can ensure the sealing of the cavity structure inside the bellows while ensuring the reliability of the bellows connection.

(4) When the utility model is used, the long side (that is, the side of 80mm) is basically vertical, which greatly enhances the lateral rigidity of the parts, and ensures that when the length of the bellows exceeds 1m, only the two ends need to be fixed, and the middle part will not be When bending occurs, the above-mentioned properties make the bellows in use, can be serialized and expanded in the length direction according to the site conditions, so as to be suitable for use in different printing paper widths or different site conditions.

(5) The diameter of the air inlet pipe used by the bellows of the present utility model is small, and the cross-sectional size of the bellows is small, the shape is regular, the overall structural size of the flattening device is small, the space adaptability is high, and the on-site layout is installed. Simple adjustment, stable flattening effect for printing paper.

Description of drawings

In order to illustrate the technical solutions of the present invention more clearly, the accompanying drawings that need to be used in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, without creative work, Other drawings can also be obtained from these drawings.

1 is a schematic structural diagram of a flattening system in the prior art;

Fig. 2 is the structural representation of a kind of printing paper blowing and flattening device in the prior art;

3 is a schematic diagram of the overall structure of a bellows used in a printing paper flattening device according to Embodiment 1 of the present utility model;

4 is a schematic cross-sectional structure diagram of a first type of a bellows used in a printing paper flattening device according to Embodiment 1 of the present utility model;

5 is a schematic cross-sectional view of a second sectional structure of a bellows used in a printing paper flattening device according to Embodiment 1 of the present utility model;

6 is a partial bottom structural view of a bellows used in a printing paper flattening device according to Embodiment 1 of the present utility model;

7 is a schematic structural diagram of a flattening device according to Embodiment 2 of the present invention;

Description of reference numbers:

Figure 1: 1-1, blowing and flattening mechanism; 2-1, camera scanning line; 2-2, camera imaging point; 2-3, printed product; 2-4, impression cylinder;

Figure 2: 1. Air inlet; 2. Air duct cavity; 3. Air outlet;

Figure 3-Figure 7: 1-Blow box, 10-Box body, 11-Box cover, 12-Air inlet, 13-First air storage chamber, 14-Air outlet, 15-Second air storage chamber, 16- The first channel, 17-support surface structure, 18-fixed screw, 19-first guide groove, 20-second guide groove, 21-first exhaust hole, 22-second exhaust hole; 2-air Source equipment; 3-main air intake pipe; 4-roller; 5-printing paper; 6-paper detection point; 7-camera shooting line.

Detailed ways

In order to make the purpose, implementation and advantages of the present invention clearer, the exemplary embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present invention. Obviously, the described examples The illustrative embodiments are only some, but not all, embodiments of the present invention.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Based on the exemplary embodiments described in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the appended claims of the present invention. Furthermore, while the disclosures in this disclosure have been presented in terms of one or more illustrative examples, it should be understood that various aspects of these disclosures may also constitute a complete embodiment in isolation.

It should be noted that the brief description of terms in the present invention is only for the convenience of understanding the embodiments described below, rather than intended to limit the embodiments of the present invention. Unless otherwise specified, these terms are to be understood according to their ordinary and ordinary meanings.

In order to facilitate the technical solution of the application, some concepts involved in the present utility model are first described below.

After the printing paper 5 is sent out to before the printing paper 5 is received, the paper head is clenched by the gripper teeth, that is, during the movement of the printing paper 5, only the state of the paper head is restricted, and other parts of the printing paper 5 are in a free state.

In the present invention, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply existence between these entities or operations any such actual relationship or sequence. In addition, the terms "comprising", "also includes", "for", "mainly for" or any other variation are intended to encompass non-exclusive inclusion such that it includes not only the explicitly listed elements, but also the non-exclusively listed elements. other elements listed. Moreover, the words "inside", "outside", "upper", "lower", etc., which describe the orientation in the present invention are all described according to the location of the drawings of the present invention or the orientation of the product in actual use, therefore , it will not cause the scheme of the utility model to be unclear.

In addition to the flattening system disclosed in the background technology of the present utility model, as shown in FIG. 2 , the prior art also includes a blowing and flattening device for printing paper, including: an air inlet, an air duct cavity and more than one Air outlet, the inner cross-sectional area of the air duct cavity is greater than or equal to the area of the air inlet, the area of the air inlet is greater than or equal to the total area of the air outlet, all air outlets are kept on a plane, and the size of the area Similarly, the middle air outlet is perpendicular to the air duct cavity, and the other air outlets except the middle air outlet are inclined to both sides by 0-10 degrees respectively relative to the middle air outlet. However, as shown in Fig. 2, in actual use, it is necessary to ensure that the middle position of the printing paper is consistent with the middle position of the air duct, and the flattening effect of the printing paper cannot be guaranteed. It is necessary to increase the number of air ducts in the middle position to increase the density to ensure the flattening effect; and the arrangement angles of air ducts in different positions are different, the manufacturing process is complicated, and the overall structure of the printing paper blowing and flattening device is large in size and space. Poor adaptability.

Example 1

Referring to Fig. 3-Fig. 6, the present embodiment 1 provides a bellows used in a printing paper flattening device. As shown in Figs. 3 and 4, the bellows 1 is designed as a rectangular multi-cavity structure, Including: interconnected box body 10 and box cover 11;

Wherein, as shown in FIG. 3 , at least two air inlets 12 are provided on the side of the box body 10 away from the box cover 11 , and at least two of the air inlets 12 are arranged on the same central axis, as shown in the figure 4, the air inlets 12 are all connected to the first air storage cavity 13, and the first air storage cavity 13 is arranged inside the box body 10. The arrows in FIG. The direction of flow inside the box body 10;

As shown in FIG. 6 , the box body 10 is provided with an air outlet 14 , and the air outlet 14 is disposed at one end away from the at least two air inlets 12 . As shown in FIG. 4 , the air outlet 14 Connected with the second air storage cavity 15, the second air storage cavity 15 is arranged inside the box body 10;

As shown in FIG. 5 , the first air storage chamber 13 is connected to the second air storage chamber 15 through a first channel 16 provided inside the box body 10 , and the first air storage chamber 13 and the The second air storage chamber 15 also includes a support surface structure 17 formed by bonding with an adhesive; the support surface structure 17 is arranged inside the box body 10 and the box cover 11, and is arranged in the The first air storage chamber 13 and the second air storage chamber 15 are used to cut off a plurality of the first passages 16 to form an intermittent structure. One side of the box body 10;

As shown in FIG. 5 , the air outlet 14 is disposed on the side away from the first channel 16 . As shown in FIG. 6 , the air outlet 14 includes a first guide groove 19 and a second guide groove 20 . The first guide groove 19 and the second guide groove 20 are arranged parallel to each other;

As shown in FIG. 6 , at least two first exhaust holes 21 evenly distributed are provided inside the first guide groove 19 , and each of the first exhaust holes 21 communicates with each other, and each of the first exhaust holes 21 communicates with each other. The distances between the exhaust holes 21 are equal;

As shown in FIG. 6 , at least two second exhaust holes 22 are evenly distributed inside the second guide groove 20 , and each of the second exhaust holes 22 communicates with each other, and each second exhaust hole 22 is connected to each other. The distances between the holes 22 are equal, and the diameter of the first exhaust hole 21 is smaller than the diameter of the second exhaust hole 22; it should be noted that, in this embodiment 1, the first exhaust hole 21 The area is 30%-80% of the area of the second exhaust hole 22 .

In the above technical solution, the first exhaust hole 21 and the second exhaust hole 22 are designed to have different diameters, which can play different roles in the flattening of the printing paper 5. The second exhaust hole 22, that is, the large hole discharges The first exhaust hole 21, that is, the small hole emits less gas, and sprays outward in a cone-like state, which is far from the first row. The airflow within a certain range of the air hole 21 is stable, and is used for smoothing the printing paper 5 . In addition, the first guide groove 19 and the second guide groove 20 are both designed as long and narrow slits, which can effectively suppress the airflow sprayed forward and backward, and the utilization efficiency of the airflow is higher, and the flattening effect is better. The air flow of the cone ejected by the exhaust hole 21 and the second exhaust hole 22 is shaped into a fan-shaped jet flow, and a plurality of fan-shaped jet flows can form one air curtain, and two guide grooves form two air curtains. In addition, those skilled in the art can select the corresponding size of the first exhaust hole 21 and the second exhaust hole 22 and the first exhaust hole 21 and the second exhaust hole 21 according to the actual exhaust situation. The specific number of the exhaust holes 22 and the distance between the two adjacent first exhaust holes 21 and the distance between the two adjacent second exhaust holes 22 are not made in this embodiment 1. specific restrictions.

In another specific implementation of Embodiment 1, both the first exhaust hole 21 and the second exhaust hole 22 can be set as small holes, but with this design, the air outlet of the air box 1 needs to be shortened 14 and the printing paper 5, otherwise due to the divergent effect of the air, the pressure of the airflow on the printing paper 5 will be insufficient, the printing paper 5 cannot be flattened, and the flattening effect will be poor.

In another specific implementation of the present embodiment 1, both the first exhaust hole 21 and the second exhaust hole 22 can be set as large holes, but with this design, when the paper trail of the printing paper 5 is in the When the first exhaust hole 21 and the second exhaust hole 22 are between, a large amount of airflow will enter the paper tail, causing the paper tail to float, and the printing paper 5 cannot be flattened, and the flattening effect is poor.

In another specific implementation of Embodiment 1, only one row of exhaust holes may be designed, for example, the first exhaust holes 21 may be designed as large holes or small holes. With this design, the exhausted airflow can only form an air curtain, which acts on one line of the printing paper 5, and the area where the pressure acts is small, which is easily affected by the characteristics of the printing paper 5, including the paper head, paper tail and paper length, etc. The flattening effect is unstable.

Further, as shown in FIG. 3 , in a specific implementation of Embodiment 1, the number of air inlets 12 is 4, and the 4 air inlets 12 are in the area of the first air storage cavity 13 Evenly distributed, and the distance between every two adjacent said air inlets 12 is equal, the specific distance can be changed according to the length of the first air storage cavity 13 or the length of the air box 1 in actual use, The number of the air inlets 12 can also be changed correspondingly according to the length of the first air storage chamber 13 or the length of the air box 1 , so as to achieve a better flattening effect on the printing paper 5 .

Further, in the present embodiment 1, the diameters of the four air inlets 12 are all set to 12 mm, but those skilled in the art can also change the diameter of the air inlets 12 in actual use. The diameter dimension of the air inlet 12 disclosed in Example 1 is only the optimum diameter dimension.

Further, in this embodiment 1, the wind box 1 is designed as a rectangular multi-cavity structure. The common manufacturing method of the cavity structure is casting, but the surface of the cavity structure obtained by casting is relatively rough, which is not conducive to the passage of high-speed circulating gas. Therefore, the technical solution of Embodiment 1 adopts the design of one face of the cavity structure as an assembly structure, that is, the inner surface of the cavity structure becomes the outer surface of the part of the box body 10, which solves the processing problem inside the cavity structure. The box body 10 of the present embodiment 1 is processed by a milling machine, and all processing positions are open outside, and there is no processing difficulty. In addition, in order to enable the air box 1 to be used in a narrow space environment, the box cover 11 cannot be too thick, and the box cover 11 of the present embodiment 1 is designed as a thin sheet metal structure. However, due to the high gas pressure inside the air box 1, if one surface of the cavity structure is designed as a thin sheet metal structure, the connection between the box body 10 and the box cover 11 has extremely high requirements on the manufacturing process. Therefore, in Embodiment 1, a discontinuous structure is designed between the first air storage chamber 13 and the second air storage chamber 15 , that is, a part is communicated through the first passage 16 , and the other part is separated by the support surface structure 17 . This structure greatly reduces the area of the box cover 11 that is subjected to gas pressure, and the box cover 11 further transmits the pressure it bears to the box body 10 through a plurality of fixing screws 18, thereby ensuring that the box cover 11 does not generate due to excessive pressure. Large deformation caused by large. Further, the contact surface of the box body 10 and the box cover 11 is glued to ensure the sealing of the air box 1 . Using the structure of the bellows 1 of the first embodiment, it can still ensure that the box cover 11 does not deform and the bellows 1 does not leak when the cavity is subjected to a gas pressure of 0.6 MPa. At the same time, the structure of the bellows 1 of the first embodiment Simpler and better performance.

Example 2

Corresponding to the aforementioned Embodiment 1 of a wind box applied to a printing paper flattening device, the present invention also provides Embodiment 2 of a flattening device. As shown in FIG. 7 , the flattening device includes: a wind box 1, an air source device 2, a main intake pipe 3 and a roller 4, and one end of the main intake pipe 3 passes through a quick-insertion reducing device (not shown in FIG. 7 ). shown) are respectively connected to at least two air inlets 12 of the air box 1, and the other end of the main air intake pipe 3 is connected to the air source device 2; the air box 1 is arranged on the outside of the roller 4, and It is arranged parallel to the camera shooting line 7 .

Further, in this embodiment 2, the wind box 1 is installed on one side of the printing paper 5, and the distance between the wind box 1 and the printing paper 5 is 6mm-15mm, and the printing paper 5 is attached to the roller. 4; in addition, the point where the camera shooting line 7 coincides with the roller 4 in FIG. 7 is the paper detection point 6; specifically, in this embodiment 2, as shown in FIG. The distance between the air port 14 and the printing paper 5 is 10 mm.

Further, in the second embodiment, the section of the box body 10 of the wind box 1 is a rectangle with a width of 20 mm and a height of 80 mm.

In addition, it should be noted that, in this embodiment 2, the quick-insertion reducing device (not shown in FIG. 7 ) can use the quick-insertion reducing four-way, that is, the main air intake pipe 3 is converted into three 12mm slave inlets. Trachea, the secondary air pipe is the branch bronchus of the main air intake pipe 3, and the three 12mm secondary air intake pipes are connected to the three air inlets 12 respectively; a quick-insertion variable diameter five-way can also be used, that is, the main air intake pipe 3 is turned into 4 A 12mm secondary intake pipe, and four 12mm secondary intake pipes are respectively connected to the four intake ports 12.

Further, in a specific implementation of the second embodiment, the distance between the camera shooting line 7 and the wind box 1 is set to 2mm-10mm; specifically, in the second embodiment, as shown in the figure 7, the distance between the camera shooting line 7 and the wind box 1 is set to 5mm.

Further, in a specific implementation of Embodiment 2, the air source device 2 adopts an air compressor capable of providing compressed air, and the distance between the air source device 2 and the end of use, that is, the air box 1 can be relatively far , the distance does not affect the normal use of the air source device 2 .

Further, in a specific implementation of Embodiment 2, the main air intake pipe 3 includes a hard pipe and a hose (not shown in FIG. 7 ), and the hard pipe is used for the air source device 2 and the In a flattening device with a straight-line distance of bellows 1 greater than 10m; the hose is used in a flattening device with a straight-line distance between the air source equipment 2 and the bellows 1 not greater than 10m; specifically, in In this embodiment 2, when the main air intake pipe 3 uses a hard pipe for pipe layout, the hard pipe needs to use an air pipe with a diameter greater than 20 mm; when the main air intake pipe 3 uses a hose for pipe layout, the The hose requires the use of an air tube with a diameter of about 16mm.

It should be noted that, in this embodiment 2, each parameter is the optimum range or optimum value for realizing the technical solution of the present utility model, and those skilled in the art can still, according to the specific actual situation, Corresponding adjustments are made, but the technical solution obtained after simple parameter modification and adjustment according to the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

In Embodiment 1 and Embodiment 2 of the present utility model, the working principle of the wind box 1 is as follows:

As shown in FIG. 4 , first, gas, namely compressed air, is introduced through the air inlet 12 . When the compressed air passes through the air inlet 12 and reaches the first air storage chamber 13 connected to the air inlet 12 , the first air The air storage chamber 13 pre-stores a part of the gas, that is, compressed air is used as a relay, and the gas flows into the first air storage chamber 13 and quickly fills the first air storage chamber 13 to ensure the uniformity of the gas pressure inside the first air storage chamber 13. The process is as follows: when When the gas, that is, the compressed air, reaches the first air storage cavity 13 , the movement of the gas will be restricted by the cavity arm of the first air storage cavity 13 , and a turbulent flow is formed inside the first air storage cavity 13 , stirring the entire first air storage cavity 13 . The internal gas, at this time, the high-pressure and high-speed gas flows rapidly to the low-pressure and low-speed area, thereby ensuring that the gas pressure in the first gas storage chamber 13 is basically the same;

Secondly, the gas enters the second air storage chamber 15 through the first channel 16 connecting the first air storage chamber 13 and the second air storage chamber 15 after being uniformly pressured inside the first air storage chamber 13 . Carry out secondary uniform pressure within 15;

Finally, the gas that has been uniformly pressured twice, that is, the compressed air, is discharged from the air box 1 through the air outlet 14. At this time, the air flow of the air outlet 14 is stable, that is, the plurality of first exhaust holes 21 of the air outlet 14 and the plurality of The air pressure near the second exhaust hole 22 is basically the same. As shown in FIG. 7 , the gas discharged from the air box 1 is evenly blown onto the surface of the printing paper 5, so that the printing paper 5 is evenly pressed onto the roller 4 arranged below the printing paper 5, and the flattening of the printing paper 5 is completed. And can ensure the stability of the flattening effect.

It should be pointed out that the marks on the air inlet 12 and the air outlet 14 in FIG. 7 are for the convenience of the description of the scheme, but they are different from the specific details of the air inlet 12 and the air outlet 14 on the bellows 1 . The structure and quantity do not correspond. The specific structure and quantity of the air inlet 12 and the air outlet 14 can be obtained with reference to other drawings. Therefore, the marks in FIG. 7 will not make the technical solution of the present invention unclear. Secondly, the air source equipment 2 and the main air intake pipe 3 in FIG. 7 are only a simple schematic diagram drawn to illustrate the overall structure of the solution, and do not represent their position and size in actual use, and will not cause the present invention. The plan is unclear. In addition, it should be noted that since the entire bellows 1 has a relatively long structure, the two air inlets 12 and their corresponding other structural parts are omitted in the middle of FIG. 5 and FIG. 6 to show the complete drawing, but it does not affect the Implementation of the technical solution of the present utility model.

Claims (11)

1. A wind box applied to a printing paper flattening device is characterized in that the wind box is designed into a rectangular multi-cavity structure and comprises: a case body and a case cover connected to each other;

at least two air inlets are formed in one side, away from the box cover, of the box body, the at least two air inlets are arranged on the same central axis and are connected with a first air storage cavity, and the first air storage cavity is arranged inside the box body;

the box body is provided with an air outlet, the air outlet is arranged at one end far away from at least two air inlets, the air outlet is connected with a second air storage cavity, and the second air storage cavity is arranged inside the box body;

the first air storage cavity is connected with the second air storage cavity through a first channel arranged inside the box body;

the air outlet is arranged on one side far away from the first channel and comprises a first diversion trench and a second diversion trench, and the first diversion trench and the second diversion trench are arranged in parallel;

at least two first exhaust holes are formed in the first diversion trench, and the first exhaust holes are communicated with one another;

at least two second exhaust holes are formed in the second diversion trench, the second exhaust holes are communicated with one another, and the diameter of the first exhaust hole is smaller than that of the second exhaust hole.

2. A bellows for use in a printing sheet flattening device according to claim 1,

a supporting surface structure formed by bonding the first gas storage cavity and the second gas storage cavity by adopting an adhesive is further arranged between the first gas storage cavity and the second gas storage cavity;

the supporting surface structure is arranged in the box body and the box cover and between the first air storage cavity and the second air storage cavity and used for separating the first channels to form an intermittent structure.

3. The wind box for a printing paper flattening device according to claim 1, characterized in that at least two of the air inlets are uniformly distributed in the area of the first air reservoir, and the distance between each air inlet is equal.

4. The wind box applied to a printing paper flattening device according to claim 1, wherein at least two first air discharge holes are uniformly distributed inside the first guiding gutter, and the distance between the first air discharge holes is equal.

5. The wind box applied to a printing paper flattening device according to any one of claims 1 to 4, wherein at least two second air discharge holes are uniformly distributed inside the second guiding gutter, and the distance between the second air discharge holes is equal.

6. A flattening apparatus using a wind box according to any one of claims 1 to 5 applied to a printing paper flattening apparatus, the flattening apparatus comprising: the air box comprises an air box body, air source equipment and a main air inlet pipe, wherein one end of the main air inlet pipe is connected with at least two air inlets of the air box body respectively through quick-insertion variable-diameter equipment, and the other end of the main air inlet pipe is connected with the air source equipment.

7. The flattening device of claim 6, further comprising a roller, wherein the wind box is arranged outside the roller and parallel to the camera shooting line.

8. A flattening device according to claim 6 or 7, characterized in that the wind box is arranged on one side of the printing paper, the distance between the wind box and the printing paper is 6mm-15mm, and the printing paper is attached to the roller.

9. The flattening apparatus according to claim 7, wherein a distance between the camera shooting line and the wind box is set to be 2mm to 10 mm.

10. The flattening apparatus according to claim 6, wherein the air supply device employs an air compressor capable of providing compressed air.

11. The flattening apparatus of claim 6, wherein the main inlet duct includes a hard tube and a flexible tube,

the hard pipe is used in a flattening device with the linear distance between the air source equipment and the wind box being more than 10 m;

the hose is used in a flattening device, wherein the straight line distance between the air source equipment and the wind box is not more than 10 m.

Images