KR200280622Y1 - Supplying paper apparatus for printer - Google Patents

Abstract

A paper feeder of a printing machine is started. The paper feeding device of the disclosed printing machine includes a cassette for storing paper and inserted into and retractable from the main body of the printing machine, and a pickup roller structure capable of lifting and lowering a sheet of paper stored in the cassette. A main frame installed in the printer main body; An auxiliary frame having a guide member installed in a horizontal direction on one side of the main frame; And a pickup member which is supported by the cassette and installed to be capable of linearly reciprocating along the guide member so as to move up and down the pickup roller structure which is interfered with the reciprocating conveyance of the body and slides up and down in the body. It features. Therefore, by improving the pickup means of the conventional pickup roller as described above, there is an advantage in that it prevents interference with other structures in the surroundings and consequently solves the limitation of the installation space accompanying the arrangement of the surrounding structures. .

Description

Supply paper apparatus for printer {Supplying paper apparatus for printer}

The present invention relates to a paper feeder of a printing machine, and more particularly, to a paper feeder of the printing machine is improved in its structure so that the pickup means of the pickup roller for picking up the paper does not interfere with the surrounding structure.

In general, a printing apparatus such as a printer or a copying machine is provided with a paper feeding apparatus for storing a plurality of sheets of paper and sequentially feeding the stored sheets into the main body of the printing apparatus.

1 is a view showing a paper feeding device of a conventional printing machine.

Referring to Figure 1, the paper feeder of the conventional printing machine is detachably coupled to one side of the printer main body 110, the cassette 120 and a plurality of sheets (S) are accommodated therein, and the cassette 120 ) A pick-up roller 111 and a feeding roller 112 for feeding out the sheet S stored in the sheet 1 and feeding the sheet S into the main body 110, and the cassette 120. The knock-up plate 121 is rotatably installed in the interior of the paper S to lift the leading end of the paper S toward the pickup roller 111, and the knock-up plate is rotated by a predetermined driving source (not shown). A lifter 115 is installed to rotate the knock-up plate 121 toward the pickup roller 111.

In such a configuration, when the cassette 120 containing the paper S is coupled to the main body 110, the lifter 115 rotates to lift the knock-up plate 121. Accordingly, the pickup roller 111 is rotated in the clockwise direction of the drawing to be in close contact with the paper (S). When the pickup roller 111 rotates in such a close state, the paper S stored in the cassette 120 is picked up by the rotating pickup roller 111 and bitten by the feeding roller 112 and then the main body 110. ) Is supplied internally.

Figures 2a to 2b shows the operation of the pickup roller structure by the pickup means of Figure 1 is rotated, Figure 2a is a schematic view showing the pickup roller structure with the cassette ejected, Figure 2b is a cassette inserted A schematic diagram showing a pickup roller structure in a state.

2A to 2B, the main frame 130, the auxiliary frame 130a, the cassette 120, the pickup roller structure 133, and the pickup roller 111 are installed in the main body of the printing machine. Up-down pickup means is provided for.

The pickup means includes a rotation plate 132 rotating about the rotation shaft 131 installed on the main frame 130. The rotating plate 132 is a shape bent "V", the sliding portion 132a is supported on one side of the pickup roller structure 133, and the rotating plate 132 when the cassette 120 is inserted and taken out It is provided with a cassette support portion 132b in contact with one side of the cassette 120 to rotate. In addition, the sliding portion 132a is further provided with a tension spring 134, which is tension-restored in accordance with the rotation of the rotation plate 132.

The pickup roller structure 133 is provided with a compression spring 135 fixed to the auxiliary frame 130a. Here, the elastic force of the tension spring 134 is preferably larger than the elastic force of the compression spring 135.

In the above configuration, in the state where the cassette is taken out, as shown in FIG. 2A, the pickup roller structure 133 is disposed on the sliding portion 132a of the rotating plate 132 stopped horizontally with the cassette 120. Supported.

In this state, when the cassette 120 is inserted and pushed toward the cassette support 132b, as shown in FIG. 2B, the body of the cassette 120 contacts the cassette support 132b while being rotated by the insertion force thereof. ) Rotate in the a direction. Then, the tension spring 134 is tensioned due to the rotation of the rotation plate 132, and the pickup roller structure 133 seated on the sliding part 132a is slid by the elastic bias of the compression spring 135. Slid downward while sliding down to bring the pickup roller 111 into close contact with the paper (S in FIG. 1) of the cassette 120.

On the contrary, when the cassette 120 is taken out of the main body of the printing machine, the rotation plate 132 in which the cassette support 132b is in contact with the body of the cassette 120 is rotated in the b direction by the restoring force of the tension spring 134. . At the same time, the sliding portion 132a is also rotated in the b direction by the restoring force of the tension spring 134, so that the pickup roller structure 133 slides upward along the sliding portion 132a. Thus, the pickup roller 111 is separated from the sheet of paper (S in FIG. 1) of the cassette 120. That is, the pickup roller structure 133 is able to slide upward along the sliding part 132a by the elastic force of the tension spring 134 because the elastic force of the tension spring 134 is greater than the elastic force of the compression spring 135. . Thereafter, the pickup roller structure 133 is returned to its original state as shown in FIG. 2A.

By the way, in the rotation of the pickup means as described above, the rotation plate 132 has a large radius of rotation and interferes with other structures around the installation installed on the main frame 130, in order to prevent this rotation plate 132 The installation space around the unit should be kept wide. As a result, in response to the rotation radius of the rotation plate 132, there is a problem that the constraint of the installation space accompanying the arrangement of the surrounding structures is increased.

The present invention has been made to solve the above problems, and provides a paper feeder for a printing machine whose structure is improved so that the pickup means of the pickup roller for picking up the paper stored in the cassette does not interfere with other structures in the vicinity. Has its purpose.

1 is a view showing a paper feeder of a conventional printing machine,

Figures 2a to 2b shows the operation of the pickup roller structure by the pickup means of Figure 1 is rotated, Figure 2a is a schematic view showing the pickup roller structure with the cassette ejected, Figure 2b is a cassette inserted A schematic diagram showing the pickup roller structure in a state,

Figure 3 is a schematic exploded perspective view showing a paper feeding device of the printing machine according to the present invention,

4 is a perspective view of the combination of FIG.

5A to 5B show an up-down operation of the pickup roller structure by the pickup member of FIG. 3, FIG. 5A is a schematic view showing a pickup roller structure with a cassette taken out, and FIG. A schematic diagram showing a pickup roller structure in an inserted state.

<Explanation of symbols for the main parts of the drawings>

110,210 ... Printing machine body 111,211 ... Pick-up roller

112 ... feeding roller 115,215 ... lifter

120,220 ... cassette

121,221 ... knock-up plate

130,230 ... mainframe 130a, 230a ... subframe

131 ... rotating shaft 132 ... rotating plate

132a, 242 ... sliding part 132b ... cassette support

133,233 pickup roller structure 134 tension spring

135 ... Compression spring 230b ... Guide member

230c ... guide ball233b ... protrusion

233s ... First elastic spring 240 ... Pickup member

241.Seat 243 ... Supporting Jaw

244 ... 2nd elastic spring

In order to achieve the above object, a sheet feeding apparatus of a printing apparatus according to the present invention includes a cassette for receiving paper and being inserted into and pulled out of the main body of the printing machine, and being able to lift and draw one sheet of paper stored in the cassette. A paper feeder of a printing machine having a pickup roller structure, the apparatus comprising: a main frame installed in the main body of the printing machine; An auxiliary frame having a guide member installed in a horizontal direction on one side of the main frame; And a pickup member which is supported by the cassette and installed to be capable of linearly reciprocating along the guide member so as to move up and down the pickup roller structure which is interfered with the reciprocating conveyance of the body and slides up and down in the body. It features.

According to the present invention, it is preferable that the pickup roller structure is supported by a first elastic spring installed in the auxiliary frame to be moved up and down, and a protrusion formed on one side of the pickup member is formed.

According to the present invention, the pickup member is provided with a body portion, the lower end of the body portion support jaw formed so that the front end surface of the cassette is inserted and taken out; A second elastic spring connected to the body part and the auxiliary frame to support a transverse reciprocating movement of the body part by the insertion and withdrawal of the cassette; A seating part in which the protrusion is seated; And a sliding part extending from the seating part to be inclined downward by a predetermined angle and sliding the protrusion part.

According to the present invention, the first and second elastic spring is provided with a compression spring, the elastic force of the second elastic spring is preferably greater than the elastic force of the first elastic spring.

Therefore, by improving the pickup means of the conventional pickup roller as described above, it is characterized by preventing interference with other structures in the surroundings, and consequently, eliminating the limitation of the installation space accompanying the arrangement of the surrounding structures. .

This feature will be described in detail with reference to the accompanying drawings.

3 is a schematic exploded perspective view illustrating a paper feeding device of a printing apparatus according to the present invention, and FIG. 4 is a combined perspective view of FIG. 3.

Referring to FIG. 3, the paper feeder of the printing apparatus according to the present invention includes a main frame 230 installed in the main body of the printing machine 210, an auxiliary frame 230a installed in the main frame 230, and the auxiliary frame 230a. It is provided with a pickup member 240 and the pickup roller structure 233 to be installed. In addition, a cassette (220 in FIG. 4) in which paper (S in FIG. 1) is housed below the pickup roller structure 233 is coupled.

The auxiliary frame 230a is installed on one side of the main frame 230 and is formed with a guide hole 230c and a predetermined rail (not shown) and installed in a horizontal direction perpendicular to the main frame 230. ). In addition, one side of the guide member 230b is provided with a pickup roller structure 233 is raised and lowered by the pickup member 240 to be described later.

The pickup roller structure 233 includes a pick-up roller 211, a shaft 233c coupled to the pickup roller 211, and a support 233a to which the shaft 233c is coupled. The pickup roller structure 233 is supported to be lifted by being supported by the first elastic spring 233s connected to the auxiliary frame 230a, and the support 233a is mounted on one side of the body of the pickup member 240 to be described later. The protrusion part 233b is formed.

The guide member 230b is provided with a pickup member 240 in which a part of the body part is fitted into the guide hole 230c and coupled to the rail and reciprocated along the guide hole 230c by a predetermined elastic force. .

The body portion of the pick-up member 240 has a seating portion 241 on which the protrusion 233b of the pick-up roller structure 233 is seated, and interferes with the reciprocating movement of the body portion by elastic force, and thus the protrusion 233b along the surface thereof. Sliding portion 242 that is vertically sliding up and down is formed, and a support jaw 243 is formed in the lower end of the body portion is supported by the front end surface of the cassette 220 is inserted and taken out. The second elastic spring may be elastically reciprocated along the guide hole 230c in response to the operation of the cassette 220 which is supported and supported by the support jaw 243 at the front end of the body part. 244 is connected to one side of the auxiliary frame 230a.

Here, the first and second elastic spring 233s (244) is provided with a compression spring, the elastic force of the second elastic spring 244 is preferably greater than the elastic force of the first elastic spring (233s).

Meanwhile, referring to FIG. 4, the cassette 220 has a knock-up plate (121 of FIG. 1) of the cassette 220 while being rotated by the driving source 215a installed in the main frame 230. A lifter 215 pivoting toward the pickup roller structure 233 is installed.

In the configuration as described above, the operation of the paper feeder of the printing machine according to the present invention will be described in detail.

The above description will be made with reference to FIGS. 3 to 4, but will be described in more detail with reference to FIGS. 5A to 5B.

5A to 5B show an up-down operation of the pickup roller structure by the pickup member of FIG. 3, FIG. 5A is a schematic view showing a pickup roller structure with a cassette ejected, and FIG. 5B is a cassette inserted. It is a schematic diagram which shows the pick-up roller structure in the closed state.

As shown in Figure 5a, first, in the ejection state before the cassette 220 is inserted, the pickup member 240, the second elastic spring 244 is connected to the auxiliary frame 230a, respectively, the guide hole ( It is located at the tip portion a of 230c of FIG. In addition, the protrusion (233b of FIG. 3) of the pickup roller structure 233 is seated on the seating portion 241 of the pickup member 240. In this case, the pickup roller structure 233 is the first elastic spring 233 s. In the state that is supported by the seating portion 241 of the pickup member 240 by a) is positioned above the predetermined height of the cassette 220 side.

As shown in FIG. 5B, on the contrary, when the cassette 220 is inserted into the printer main body (210 of FIG. 3), when the user pushes the rear end surface of the cassette 220 toward the main frame 230, the insertion is performed. The front end surface of the cassette 220 is in contact with the supporting jaw 243 of the pickup member 240, the cassette 220 is the pickup member 240 is guide member (230b in Figure 3) by the insertion force A close contact so as to be transferred to the rear end (b) of the guide hole (230c of Figure 3) along. At this time, the protrusion (233b in FIG. 3) of the pickup roller structure 233 seated on the seating portion 241 of the pickup member 240 is interfered by the transfer of the pickup member 240 to the sliding portion 242. Will come close. If the cassette 220 continues to be inserted as described above, the pickup member 240 is the rear end portion (b) of the guide hole 230c along the guide hole 230c by inserting the cassette 220, that is, the cassette ( 220 is transferred toward the insertion direction. As a result, since the elastic force of the first elastic spring 233s acts toward the cassette 220, the pickup roller structure 233 gradually slides downward along the surface of the sliding portion 242 by the elastic bias. Down to the leading edge of the paper;

In this way, when the entirety of the cassette 220 is inserted, that is, the pickup roller structure 233 has completed the lowering toward the cassette 220, the lifter 215 of FIG. 3 is a driving source (installed in the main frame 230). Due to the driving of 215a of FIG. 3, the cassette 220 is rotated upward from below. The pivoted lifter 215 lifts the knock-up plate (121 of FIG. 1) of the cassette 220 so that the tip of the paper (S of FIG. 1) is lifted toward the pickup roller 211. Thereafter, the pick-up roller 211 lowered as described above is in close contact with the front end of the paper S, and is rotated by a predetermined driving source (not shown) to be in close contact with the paper, that is, paper stored in the cassette 220. The sheets stacked on the top of the sheets are sequentially fed into the printer main body (210 of FIG. 3) one by one.

On the other hand, when the cassette 220 is taken out, the pickup member 240 is the cassette 220 by the restoring force of the second elastic spring 244 with the support jaw 243 is supported on the front end surface of the cassette 220 It is conveyed in the same direction as the ejection direction of and is again positioned at the tip portion (a) of the guide hole (230c of FIG. 3). At this time, the pickup roller structure 233 downwardly slides upward along the surface of the sliding part 242 of the pickup member 240 while the pickup member 240 is conveyed in the dispensing direction of the cassette 220. Done. That is, since the elastic force of the second elastic spring 244 is much larger than the elastic force of the first elastic spring 233s, the pickup member 240 by the second elastic spring 244 is picked up by the elastic force of the pickup roller structure 233. As a result, the first elastic spring 233s is compressed, and the protrusion 233b is slid upward in contact with the surface of the sliding part 242.

As such, the pickup roller structure 233 in the ejection of the cassette 220 is completed, as shown in FIG. 5A, as shown in FIG. 5A, a protrusion (233b of FIG. 3) on the seating portion 241 of the pickup member 240. ) Will return to the seated position. That is, the pickup roller structure 233 is spaced apart from the cassette 220 by a predetermined distance.

As described above, according to the paper feeder of the printing apparatus according to the present invention, unlike the conventional concern that the interference of the surrounding structures occurring around the rotation radius of the rotating plate (132 of FIG. 2), the main frame 230 in the horizontal direction By raising and lowering the pick-up roller structure 233 along the sliding part 242 in an up-down manner so as not to interfere with other structures around by the pick-up member 240 by the reciprocating transfer in the installed auxiliary frame 230a, It is possible to remove the constraints of the layout space associated with the surrounding structures.

As described above, the paper feeding device of the printing apparatus according to the present invention improves the pickup means structure of the pickup roller, thereby preventing interference with other structures in the surroundings, and consequently the installation accompanying the arrangement of the surrounding structures. This has the advantage of eliminating space constraints.

Claims (3)

In the paper feeder of the printing machine is provided with a cassette for storing paper and inserted into and pulled out of the main body of the printing machine, and a pickup roller structure for lifting and lowering the sheet of paper stored in the cassette, Main frame installed in the main body of the printing machine: Auxiliary frame having a guide member installed in the transverse direction on one side of the main frame: And Supported by the cassette and installed to reciprocate linearly along the guide member, and for lifting up and down the pickup roller structure which is slid up and down in the body by interference with the reciprocating transfer of the body, the body is provided but the body A support jaw formed at the lower end of the portion such that the front end face of the cassette to be inserted and taken out is supported; A second elastic spring connected to the body part and the auxiliary frame to support the transverse reciprocating movement of the body part by the insertion and withdrawal of the cassette; A seating part in which the protrusion is seated; And And a pickup member extending to the seating portion to be inclined downward by a predetermined angle and having a sliding portion in which the protrusion is slid. The method of claim 1, The pickup roller structure, And a projection part seated on one side of the pickup member to be supported and lifted up and down by the first elastic spring installed in the auxiliary frame. The method of claim 2, The first and second elastic springs are provided with a compression spring, the elastic force of the second elastic spring is a paper feeding device, characterized in that greater than the elastic force of the first elastic spring.