CN107472942B - a paper feeding device - Google Patents

Abstract

The invention discloses a paper feeding device, which comprises a frame, a workbench, a plurality of paper feeding wheels, four connecting rods and a first driving device, wherein the workbench is used for supporting a paper board, the paper feeding wheels are arranged below the workbench and used for conveying the paper board, the four connecting rods are respectively hinged with the workbench around a horizontal axis, the first driving device is arranged on the frame and used for driving two connecting rods at the output side of the workbench to move up and down, and the second driving device is arranged on the frame and used for driving two connecting rods at the other side of the workbench to move up and down; the upper part of each paper feeding wheel can extend out of the corresponding opening on the workbench. The paper feeding device provided by the invention avoids using two rollers to clamp the paper board for paper feeding, and ensures that extrusion deformation cannot occur in the paper board conveying process.

Description

a paper feeding device

technical field

The invention relates to the field of printing machinery, in particular to a paper feeding device.

Background technique

The conventional paper feeding methods of printing machines for cardboard printing are: double-roller paper feeding and vacuum adsorption paper feeding. These two paper feeding methods require at least one set of paper feeding rollers to clamp the cardboard, so as to realize the feeding of the cardboard. However, the mechanical strength of cardboard is generally not high, and the most commonly used cardboard is corrugated cardboard, whose core layer is not solid and has weak compressive capacity; when the paper feeding roller clamps the corrugated cardboard, the thickness of the cardboard will be reduced, that is, Deformation occurs in the thickness direction of the cardboard. However, in order to make the cardboard less deformed, the force of the paper feed roller to clamp the cardboard must be smaller, but this often does not clamp the cardboard stably, and deviations will occur during the paper feeding process, which will affect the printing quality.

It can be seen that the prior art still needs to be improved and enhanced.

Contents of the invention

In view of the disadvantages of the above-mentioned prior art, the object of the present invention is to provide a paper feeding device, aiming at solving the technical problem in the prior art that the paper feeding device causes deformation of the cardboard when feeding paper.

In order to achieve the above object, the present invention has taken the following technical solutions:

A paper feeding device, comprising a frame, a workbench for supporting cardboard, a plurality of paper feed wheels arranged under the workbench for conveying the cardboard, four connecting rods respectively hinged with the workbench around a horizontal axis, set The first driving device on the frame is used to drive the two connecting rods on the output side of the workbench to move up and down, and the second drive device is installed on the frame and used to drive the two connecting rods on the other side of the workbench to move up and down. Driving device; the workbench is respectively provided with an opening corresponding to each paper feed wheel, and the upper part of each paper feed wheel can protrude from the corresponding opening on the workbench.

In the paper feeding device, the first driving device and the second driving device respectively include two swing shaft support seats, a swing shaft hinged on the swing shaft support seats, and a drive motor for driving the swing shaft to rotate; Each pendulum shaft is respectively provided with a connecting rod seat, and the bottom end of each connecting rod is respectively hinged with the corresponding connecting rod seat.

In the paper feeding device, a cam is sheathed on the output shaft of each driving motor, and a swing arm is respectively set on each swing shaft; the outer edge of each cam is respectively offset against the corresponding swing arm.

In the paper feeding device, each of the swing arms includes a body, each body is respectively provided with a fixed shaft, and each fixed shaft is respectively sleeved with a driven bearing; the outer edge of each cam is respectively connected to the corresponding The outer edge of the driven bearing is offset.

In the described paper feeding device, the paper feeding device also includes a vertical support plate arranged on the frame and located at the output ends of the two drive motors; the ends of the two swing shafts corresponding to the two drive motors are respectively connected to the vertical The support plate is hinged.

In the paper feeding device, the main shafts of each drive motor are respectively connected to an output shaft through a coupling; two auxiliary support plates are fixed on the vertical support plate; the ends of each output shaft away from the cam respectively pass through the corresponding The auxiliary support plate is hinged by bearings.

In the paper feeding device, each of the connecting rods includes a lower connecting rod and an upper connecting rod; each lower connecting rod is hinged to its corresponding connecting rod seat, and each upper connecting rod is respectively hinged to the workbench; Each upper link and lower link on the side are respectively connected by a rocker, the bottom of each rocker is hinged to the top of the corresponding lower link, and the upper part of each rocker is hinged to the bottom end of the corresponding upper link; Each rocker is respectively hinged with a connecting rod support, and each connecting rod support is respectively fixed on the frame; each upper connecting rod on the output side of the corresponding workbench is respectively fixed with a linear bearing, and each linear bearing is slidingly connected with a straight line Guide rails, each linear guide rail is fixed on the frame.

In the paper feeding device, the tops of the respective upper links respectively include two forks, and a pivot is arranged between the two forks; Each protruding block is respectively provided with a round hole, and each protruding block is respectively inserted between the corresponding two fork arms and cooperates with the corresponding pivot shaft.

In the described paper feeding device, several rows of paper feeding wheels are arranged under the workbench, and each paper feeding wheel of the same row is sleeved on the same hollow paper feeding wheel shaft; and the air suction holes on the inner wall, the side walls of each paper feed wheel shaft are respectively provided with through holes for communicating with the air suction hole and the inner cavity of the paper feed wheel shaft corresponding to each paper feed wheel.

In the paper feeding device, in the projection on the horizontal plane, any two adjacent rows of paper feeding rollers are arranged in a misalignment along the length direction of the paper feeding roller axis.

Beneficial effect:

The invention provides a paper feeding device. By setting a work table, four connecting rods and two driving devices, it is convenient to control the lifting of the work table so as to realize the feeding of the cardboard by the paper feeding wheel. Compared with the prior art, the paper feeding device provided by the present invention avoids the way of using two rollers to clamp the cardboard for paper feeding, so it will not cause extrusion deformation to the cardboard. In addition, during the conveying process, the control table One side is raised, which relieves the pressure of the paper pile on the cardboard being conveyed, and further ensures that the cardboard will not be deformed during conveying.

Description of drawings

Fig. 1 is a perspective view of a paper feeding device provided by the present invention.

FIG. 2 is a partially enlarged view of the S1 area in FIG. 1 .

FIG. 3 is a partially enlarged view of the area S2 in FIG. 1 .

4 is a schematic diagram of the connection between the lower link and the upper link away from the output side of the worktable in the paper feeding device provided by the present invention.

Fig. 5 is a schematic side view of the paper feeding device provided by the present invention, which is in a non-feeding state.

Fig. 6 is a schematic side view of the paper feeding device provided by the present invention, in which the left side of the workbench is in a raised state.

Fig. 7 is a schematic diagram of the layout of the paper feeding rollers in the projection on the horizontal plane in the paper feeding device provided by the present invention.

Detailed ways

The present invention provides a paper feeding device. In order to make the purpose, technical solution and effect of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Please refer to FIG. 1 to FIG. 6 , the present invention provides a paper feeding device.

The paper feeding device includes a frame (not shown in the figure), a workbench 10 for supporting the cardboard, a plurality of paper feed wheels 11 arranged below the workbench for conveying the cardboard, four respectively around the horizontal axis The connecting rods 20 hinged with the workbench (only 3 are observed in Fig. 1), are arranged on the frame and are used to drive the first drive of the two connecting rods on the output side of the workbench (the right side in the figure) to move up and down device, and the second driving device installed on the frame and used to drive the two connecting rods on the other side of the workbench (the left side in the figure) to move up and down; the workbench has an opening corresponding to each paper feed wheel 101. The upper part of each paper feeding wheel can protrude from the corresponding opening on the workbench. It should be noted that the frame itself is not the point of the invention in the present invention, so the accompanying drawings do not show it, and the present invention does not limit the specific shape of the frame. During actual application, the frame can be set according to specific needs to It is sufficient to support the necessary components (such as driving device, etc.).

Specifically, the structural principle of the second driving device of the above-mentioned first driving device is the same, and the first driving device and the second driving device respectively include two swing shaft support seats 301, and the swing shaft 31 hinged on the swing shaft support seats , and a drive motor 401 for driving the swing shaft to rotate; each swing shaft is respectively provided with a connecting rod seat 33, and the bottom end of each connecting rod is respectively hinged with the corresponding connecting rod seat. Above-mentioned each pendulum support base and drive motor are arranged on the frame. The driving motor drives the pendulum shaft to rotate within a certain angle range, and the connecting rod seat rotates together with the pendulum shaft, thereby driving the connecting rod to swing (including horizontal displacement and vertical displacement), thereby realizing the control of the lifting of the left and right sides of the workbench.

Further, a cam 404 is sheathed on the output shaft of each driving motor 401 , and a swing arm 32 is respectively set on each swing shaft 31 ; the outer edge of each cam respectively abuts against the corresponding swing arm. When working, the cam rotates with the corresponding drive motor, thereby driving the corresponding swing arm to swing in a certain arc. The specific swing range is determined by the actual working conditions and is not limited here.

Further, each of the swing arms 32 includes a body 321, each body is respectively provided with a fixed shaft 323, and each fixed shaft is respectively sleeved with a driven bearing 323; the outer edge of each cam is respectively connected to the corresponding The outer edges of the driven bearings are offset. The purpose of this setting is to make rolling friction occur where the cam contacts the swing arm, reducing wear on the cam and the swing arm.

Further, the paper feeding device also includes a vertical support plate 302 arranged on the frame and located at the output ends of the two drive motors; the ends of the two pendulum shafts corresponding to the two drive motors are respectively hinged to the vertical support plate. The above-mentioned vertical support plate is arranged on the machine frame. Through this arrangement, the section of the swing shaft provided with the swing arm forms a simply supported beam structure, which improves the stability of the swing shaft.

Further, the main shafts of each drive motor are respectively connected to an output shaft 403 through a coupling 402; two auxiliary support plates (not shown) are fixed on the vertical support plate; each output shaft is away from the end of the cam Respectively pass through the corresponding auxiliary support plate and be hinged by bearings. Due to the supporting effect of the auxiliary support plate, the output shaft can bear the shear force generated by the cam, so that the output shaft runs more stably.

In practical applications, when the size of the paper feeding device is large, the length of the corresponding connecting rod will be longer. In order to further avoid the problem of large swing displacement at the top of the connecting rod, the following settings can be made: the connecting rods 20 are respectively Including lower connecting rod 201 and upper connecting rod 202; each lower connecting rod is hinged 33 with its corresponding connecting rod seat, and each upper connecting rod 202 is respectively hinged with workbench 10; Each upper link and lower link are respectively connected by a rocker 203, the bottom of each rocker is respectively hinged with the top end of its corresponding lower link, and the upper part of each rocker is respectively hinged with the bottom end of its corresponding upper link; The rockers are respectively hinged with a connecting rod support 204 (shown in Figure 2 is that the rocker 203 is hinged to the connecting rod support 204 through a shaft 205), and each connecting rod support is respectively fixed on the frame (shown in Figure 2 Connecting hole 2041, used to pass bolts to fix the connecting rod support on the frame); a linear bearing 21 is respectively fixed on each upper connecting rod corresponding to the output side of the workbench (the right side in the figure), and each linear bearing The sliding connection has a linear guide rail (not shown in the figure), and each linear guide rail is fixed on the frame. The specific working principle is briefly described below: (1) The principle of movement away from the output side of the workbench. When the swing arm swings, it drives the lower link to swing (the lower link has both horizontal and vertical displacements), and the lower link drives the rocker to swing ( As shown in Figure 4, the rocker rotates around the axis A), the rotation of the rocker drives the swing shaft and the connecting rod seat to rotate, further drives the upper connecting rod to swing, and finally drives one side of the workbench to move up and down; as shown in Figure 5, the upper connecting rod The length of the rod is less than the length of the lower link, and because the length of the upper link is shorter, the horizontal displacement produced by the upper link to the workbench is very small, which does not affect the normal operation of the workbench. (2) Corresponding to the movement principle of the output side of the workbench, and for the movement principle away from the output side of the workbench, the rotation of the rocker drives the swing shaft and the connecting rod seat to rotate, and further drives the lower connecting rod to swing, and the lower connecting rod drives the upper connecting rod Move up and down along the linear guide rail, so as to realize the up and down movement of the output side of the table. By setting the linear bearing, the purpose is to take the lifting motion of the output side of the worktable as a reference, so as to ensure that no deviation will occur when the worktable is raised and lowered to the highest point or the lowest point every time.

Please refer to Fig. 2, further, the top of each upper link 202 includes two yokes 2021 respectively, and a pivot 2022 is arranged between the two yokes; There is a protruding block 11, and each protruding block is respectively provided with a round hole (observed in the figure), and each protruding block is respectively inserted between the corresponding two fork arms and cooperates with the corresponding pivot shaft. Through this setting, the hinge connection between the upper link and the workbench can be realized, and the upper link can stably support the workbench.

Further, several rows of paper feed wheels are arranged below the workbench (only 4 rows of paper feed wheels are schematically drawn in the drawings), and each paper feed wheel of the same row is sleeved on the same hollow paper feed wheel shaft; The paper wheel is provided with a plurality of suction holes connecting its outer wall and inner wall, and the side wall of each paper feeding wheel shaft is respectively provided with through holes for connecting the suction holes and the inner cavity of the paper feeding wheel shaft corresponding to each paper feeding wheel. The inner cavities of the above-mentioned paper feed roller shafts are connected to vacuum equipment (not shown in the figure), and the vacuum equipment is not within the protection scope of the present invention. It can be seen from FIG. 1 that the end of each paper feeding wheel shaft close to the driving motor is blindly blocked. Each of the above-mentioned paper feeding wheel shafts is connected to a power device (not shown in the figure), so as to realize the synchronous rotation of each paper feeding wheel shaft.

Please refer to FIG. 7 , furthermore, in the projection on the horizontal plane, any two adjacent rows of paper feed rollers are arranged in a misalignment along the length direction of the hollow shaft. This setting makes the contact force between the cardboard and the paper feeding wheel more uniform, and it is more stable and less likely to deviate during the conveying process.

The working principle of the paper feeding device is briefly described as follows: As shown in Figure 5, before feeding the paper, the two cams are located in the proper position to make the workbench at the highest position, and the upper part of each paper feed wheel does not pass through each opening on the workbench. stick out, that is, the bottom of the bottom sheet of the stack is not in contact with the feed rollers. The two drive motors respectively drive the two cams to rotate, thereby lowering the workbench to the lowest point, and the upper parts of each paper feed wheel protrude from each opening of the workbench, so that the bottom of the cardboard at the bottom of the stack is in contact with each feeder. The paper wheel contacts and is attracted, and the paper feed wheel rotates to send out the bottommost cardboard. Please refer to Figure 6, when the paper is halfway fed, the drive motor away from the output side (shown as the left side) rotates, raising the left side of the table to the highest position, allowing the left side of the paper stack 90 to separate from the paper feed roller Therefore, the cardboard 901 being conveyed is avoided from being completely pressed by the paper pile, that is, the pressure of the paper pile 90 on the paperboard 901 is reduced, so it can be sent out smoothly by the paper feed wheel. When a piece of cardboard is completely sent out, the driving motor on the corresponding output side (the right side in the figure) rotates, so that the corresponding cam rotates and turns to the highest position where the right side of the workbench rises (the workbench is horizontal at this time) ), at this time the next cardboard to be conveyed (located at the bottom of the paper stack at this time) is completely separated from the paper feeding wheel, and the paper feeding is stopped, thus completing a paper feeding cycle. The above-mentioned outputted cardboard enters the next process, and the specific device of the next process is not shown in the figure. It can be seen that the paper feeding device provided by the present invention avoids the use of the upper and lower rollers to clamp and convey the cardboard, avoiding the extrusion and deformation of the cardboard; during the paper feeding process, the left side of the paper pile is lifted to avoid The entire weight of the paper stack is pressed against the cardboard being conveyed, which further prevents the cardboard from being compressed and deformed, thereby ensuring that no deformation occurs during the conveying process of the cardboard.

It can be understood that those skilled in the art can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention, and all these changes or replacements should belong to the protection scope of the appended claims of the present invention.

Claims (8)

1. A paper feeder is composed of machine frame, working table for supporting paper board, multiple paper feeding wheels under said working table for delivering paper board, four connecting rods hinged to working table around horizontal axis,

the first driving device is arranged on the frame and used for driving the two connecting rods at the output side of the workbench to move up and down, and the second driving device is arranged on the frame and used for driving the two connecting rods at the other side of the workbench to move up and down; the upper part of each paper feeding wheel can extend out of the corresponding opening on the workbench;

the first driving device and the second driving device respectively comprise two pendulum shaft supporting seats, a pendulum shaft hinged to the pendulum shaft supporting seats and a driving motor for driving the pendulum shaft to rotate; each swing shaft is provided with a connecting rod seat, and the bottom end of each connecting rod is hinged with the corresponding connecting rod seat;

each connecting rod comprises a lower connecting rod and an upper connecting rod; each lower connecting rod is hinged with a corresponding connecting rod seat, and each upper connecting rod is hinged with a workbench; each upper connecting rod and each lower connecting rod far away from the output side of the workbench are respectively connected through a rocking block, the bottom of each rocking block is respectively hinged with the top end of the corresponding lower connecting rod, and the upper part of each rocking block is respectively hinged with the bottom end of the corresponding upper connecting rod; each rocker is hinged with a connecting rod support, and each connecting rod support is fixed on the frame; each upper connecting rod corresponding to the output side of the workbench is respectively fixed with a linear bearing, each linear bearing is connected with a linear guide rail in a sliding manner, and each linear guide rail is fixed on the rack;

when the paper is half-fed, the driving motor far away from the output side rotates to lift the left side of the workbench to the highest position, so that the left side of the paper stack is separated from the paper feeding wheel, the conveyed paper board is prevented from being completely pressed by the paper stack, and the pressure of the paper stack on the paper board is reduced; when a piece of paper board is completely sent out, the driving motor at the output side rotates to enable the right side of the workbench to rise to the highest position, so that a paper feeding working cycle is completed.

2. The paper feeding device according to claim 1, wherein the output shafts of the driving motors are respectively sleeved with a cam, and each swing shaft is respectively provided with a swing arm; the outer edges of the cams are respectively propped against the corresponding swing arms.

3. The paper feeding device according to claim 2, wherein each swing arm comprises a body, each body is provided with a fixed shaft, and each fixed shaft is sleeved with a driven bearing; the outer edges of the cams are respectively propped against the outer edges of the corresponding driven bearings.

4. The paper feeding apparatus as claimed in claim 3, further comprising a vertical support plate provided on the frame and positioned at an output end of the two driving motors; and the ends of the two pendulum shafts corresponding to the two driving motors are respectively hinged with the vertical supporting plate.

5. A sheet feeding apparatus according to claim 3, wherein the main shafts of the respective drive motors are connected to an output shaft via a coupling, respectively; two auxiliary support plates are fixed on the vertical support plate; the end of each output shaft far away from the cam passes through the corresponding auxiliary supporting plate and is hinged through a bearing.

6. The paper feeding device according to claim 1, wherein the top of each upper link comprises two fork arms, respectively, and a pivot is arranged between the two fork arms; the top of each upper connecting rod of the workbench is provided with a lug respectively, each lug is provided with a round hole respectively, and each lug is inserted between two corresponding fork arms respectively and is matched with the corresponding pivot shaft in a hole shaft way.

7. The paper feeding device according to claim 1 or 4, wherein a plurality of rows of paper feeding wheels are arranged below the workbench, and each paper feeding wheel in the same row is sleeved on the same hollow paper feeding wheel shaft; and a plurality of air suction holes communicated with the outer wall and the inner wall of the paper feeding wheel are formed in each paper feeding wheel, and through holes used for communicating the air suction holes and the inner cavity of the paper feeding wheel are respectively formed in the side wall of each paper feeding wheel shaft corresponding to each paper feeding wheel.

8. The paper feeding apparatus of claim 7, wherein the paper feeding rollers of any two adjacent columns in the projection on the horizontal plane are offset in the length direction of the paper feeding roller shaft.

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