KR20010058632A - Paper pick-up apparatus having frictional pad for printer - Google Patents

Abstract

PURPOSE: A frictional pad assembly of a paper pick-up device in a printer is provided to easily replace the frictional pad, to improve earth stability of a pick-up roller and support efficiency of the frictional pad. CONSTITUTION: A frictional pad assembly of a printer comprises a saddle unit(62) placed on a first portion(61a) of a lifter(61); a main connect unit combining the saddle unit to the first portion; a frictional pad(63) of a cork material fixed on a support plate(78); an extension unit(64) rectangular extended from the first portion; a pushing unit(67) pushing resilient force through cutting the extension unit and the first portion; a protrusion unit(68) protruded on cut area of the extension unit; a connect hole(69) penetrating the cut area of the first portion; ribs(72) slantingly mounted on the connect hole; and a hook(73) forming a ledge(73a). The main connect unit contains the ledge by being integrally protruded on a rear face of the saddle unit to be inserted to the connect hole.

Description

[Paper pick-up apparatus having frictional pad for printer}

The present invention relates to a friction pad assembly of a paper pick-up device for a printing press, and more particularly, to a paper pick-up apparatus for a printing press that is easy to replace a friction pad and has improved support efficiency of a friction pad and grounding stability with a pickup roller. A friction pad assembly is disclosed.

Generally, a printing machine is a device for printing an image corresponding to print data received from the outside or image data read by an embedded image scanner on a sheet of paper.

Such a printer is provided with a paper feeder for supplying paper. Typically, the paper feeder includes a paper pick-up device for picking up the paper loaded in the paper feed cassette and transferring the paper to the feed target path leading to the printing unit, and a paper feed apparatus for feeding the picked paper to the printing unit along the feed target path. .

The paper pick-up device loads paper into a supply target path by rotating a pickup roller installed to rotate in contact with paper loaded in a paper cassette.

Such a conventional paper pick-up apparatus is provided with a friction pad assembly to be picked up one by one by the friction with the pickup roller by the up-down according to the rotation of the pickup roller.

As shown in FIGS. 1 and 2, the friction pad assembly 20 according to the related art is hinged to the frame 11 and is elastically biased by being supported by the pressure spring 31 to be exposed to the intermediate region of the frame 11. And a saddle portion 22 having a lifter 21 and a friction pad 23 coupled to the front surface of the lifter 21 and selectively contacting with the rotation of the pickup roller 10.

The front surface of the lifter 21 is formed with one or more first coupling holes 24 and second coupling holes 25 formed of long holes. In addition, at one side of the rear side of the lifter 21, a support tool 26 is formed to protrude so that the pressing spring 31 installed in the main body of the printing machine can be supported.

Saddle portion 22 has a coupling hole 27 is inserted into the first coupling hole 24 of the lifter 21 on the rear. The front surface of the saddle portion 22 is mounted with a cork friction pad 23 that is selectively in contact with the rotation of the pickup roller (10 in Fig. 1), the friction pad 23 and the lower end of the saddle portion 22 It is fixed by the first clip member 28 which is clipped together in a long direction. The first clip member 28 simultaneously serves to guide the paper P toward the friction pad 23.

In addition, the lifter 21 and the saddle portion 22 are elastically clipped to the rear of the lifter 21, the body is inserted and supported by the support 26 of the lifter 21, one end of the lifter 21 The second coupling hole 25 is inserted into the gap of the first clip member 28 and is complementarily fixed by the second clip member 29 to be clipped.

The conventional friction pad assembly 20 is supported by the pressure spring 31 as the pick-up roller 10 is rotated selectively up-down, the paper P is assembled by the rotation of the pick-up roller 10 When it is down, it is picked up by the pick-up roller 10 one by one and passed between the pick-up roller 10 and the friction pad 23 to the supply target path. Here, reference numeral 40 is a knock-up plate fixed to the frame 11 to lift one end of the paper P, and support the rotation of the pickup roller 10 to allow the paper P to enter.

However, when the friction pad is replaced as necessary, the conventional friction pad assembly is combined with a plurality of parts, so that the friction pad 23 must be replaced by dismantling the parts. That is, the frame 11 is disassembled to disassemble the pressure spring 31, the second clip member 29, and the first clip member 28, and then the saddle portion 22 is deodorized from the body of the lifter 21 to friction. Since the pad 23 has to be replaced, there is a problem in that the assembly work after the replacement work and the replacement is cumbersome. In addition, the saddle portion 22 is assembled because it is assembled with the lifter 21 by the second clip member 29 that is inserted into and fixed to a gap between the first clip member 28 and the friction pad 23. The second clip member 29 is easily fixed to the saddle part 22 by its elastic force, and thus the ground state between the pickup roller 10 and the friction pad 23 is poorly maintained. There was a problem. In addition, since the lower end portion of the saddle portion 22 to which the first clip member 28 is coupled forms a step with the body of the lifter 21, it is preempted by the pickup roller 10 to be picked up by the pickup roller 10 and the friction pad ( 23) There was a problem that the paper (P) entered between the caught in the stepped portion does not pick up the paper properly.

The present invention has been made to improve the above problems, it is easy to replace the friction pad, improve the support efficiency of the friction pad and the grounding stability with the pickup roller, as well as the paper pick-up reliability of the paper improved reliability It is an object to provide a friction pad assembly of a pickup device.

1 is a schematic cross-sectional view showing a friction pad assembly according to the prior art,

Figure 2 is an exploded perspective view of Figure 1,

3 is a schematic perspective view showing a friction pad assembly according to the present invention;

4 and 5 are an exploded perspective view of Figure 3,

6 and 7 are schematic cross-sectional views for explaining the friction pad assembly according to the present invention.

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

10,50 ... pick-up roller 11,51 ... frame

20,60 ... Friction pad assembly 21,61 ... lifter

22,62 ... Saddle 23,63 ... Friction pad

24 ... first coupling hole 25 ... second coupling hole

26,66 ... Support 27 ... Joiner

28. First clip member 29 ... Second clip member

31,71 ... Pressure spring 40,80 ... Knock-up plate

51a ... through-hole 64 ... extension

65 ... long 67.

68 ... protrusion 69 ... mating hole

72 ... Rib 73 ... Hook

73a ... Jamming 74 ... Supporting projection

75 ... insertion hole 76 ... support groove

77 ... insertion protrusion 78 ... support plate

P ... paper

In order to achieve the above object, the friction pad assembly of the paper pick-up apparatus for a printing press according to the present invention is installed in a frame provided in the main body of the printing machine, is hinged to an intermediate region of the frame, and elastically moves forward through the frame. A friction pad assembly of a paper pick-up device for a printing press comprising a lifter biased and a saddle portion fixed to a front side of the lifter and contacted with a pickup roller, wherein the friction pad assembly of the lifter and the saddle is formed on the lifter and the saddle. It is characterized in that it is provided with a main coupling means that is male and female coupled to the lifter to convey the paper loaded in a selective pressure contact in accordance with the rotation of the pickup roller to the supply target path leading to the printing unit.

According to the present invention, the main coupling means is integrally formed in the body of the lifter and the pushing portion supported on the body to enable the pressing operation by the elastic force, the coupling hole formed through one side of the pushing portion and towards the coupling hole It includes one or more ribs formed to be inclined, it is preferable to include a hook protruding integrally formed on the rear of the saddle portion and the jaw is formed to be coupled to the coupling hole.

In addition, one end is inserted into the front of the lifter to support the rear of the lifter, the other end is preferably further provided with a support plate for clipping the lower end of the friction pad.

Therefore, it is easy to replace and disassemble the friction pad, which is a consumable part, and the support efficiency of the friction pad and the grounding stability with the pickup roller are improved, and the pick-up reliability of the paper is improved. .

The friction pad assembly of the paper pickup device for a printing press of the present invention having such a feature will be described in detail.

As shown in Figures 3 to 5, the friction pad assembly 60 of the paper pick-up device for a printing press according to the present invention is a frame provided in the main body of the printer on which paper (P in Figure 6) is fed (Fig. 51, a lifter 61 hinged to an intermediate region of the frame 51 and elastically biased forward, and a friction pad coupled to a front surface of the lifter 61 to be in contact with a pickup roller 50 of FIG. 6. Saddle portion 62 having a (63), and coupling means formed on the lifter 61 and the saddle portion 62 to allow the saddle portion 62 to be male and female coupled to the lifter 61.

The frame 51 of FIG. 6 is installed in the main body of the printing press, and a through hole (51a of FIG. 6) is formed to expose the lifter 61 to be described later in an intermediate region so as to elastically bias.

The lifter 61 has a first portion 61a to which the saddle portion 62 to be described later is coupled to the front surface, and a second portion 61b extended to the first portion 61a and bent to have a step. It is supported by the through-hole (51a in FIG. 6) of the frame (51 in FIG. 6) to expose the front surface of the first and second portions (61a, 61b) and is supported by the pressing spring 71 to be described later and the second It is elastically biased about the hinge point 61c extended to the part 61b. In addition, a supporter 66 is formed on the rear surface of the second portion 61b to support the pressure spring 71 fixed to the main body of the printer. Here, reference numeral 65 is a long hole formed in the first portion 61a.

The saddle portion 62 is seated on the first portion 61a of the lifter 61 and at the same time is male and female coupled to the first portion 61a by main coupling means, and a cork friction pad 63 is formed on the front surface thereof. It is supported and fixed to the support plate 78 to be described later.

The main coupling means has an extension portion 64 extending at right angles from the first portion 61a of the lifter 61, and a predetermined area of the extension portion 64 and the first portion 61a is cut away. It is provided with the pushing part 67 which can be pushed by an elastic force.

The pushing portion 67 may include a protrusion 68 protruding from the cut portion of the extension portion 64, a coupling hole 69 formed through the cut portion of the first portion 61 a, and the coupling portion 68. It has one or more ribs 72 formed above the ball 69 and inclined toward the engaging hole 69.

In addition, the main coupling means has a hook 73 is formed protruding integrally on the rear of the saddle portion 62 is inserted into the coupling hole 69 and the engaging jaw 73a is formed at the end to be male and female coupling.

In addition, the first portion 61a and the saddle portion 62 of the lifter 61 to be mutually coupled is further provided with an auxiliary coupling means for strengthening the coupling force, the auxiliary coupling means is formed around the pushing portion 67; One or more support protrusions 74 protruding outward from the upper end of the two portions 61b, and one or more insertion holes 75 formed in the lower end portion facing the support protrusion 74. In addition, the support groove 76 is formed in the upper end of the saddle portion 62 to correspond to the support projection 74, and the insertion projection formed in the lower end of the rear portion of the saddle portion 62 to correspond to the insertion hole 75 (77).

In addition, the friction pad assembly 60 of the present invention is provided with a support plate 78 for supporting the friction pad 63 to be firmly seated on the front surface of the saddle portion 62 by the elastic force, the support plate 78 is It supports the rear of the second portion 61b and supports the friction pad 63 to be stably fixed by clipping the lower end of the friction pad 63. One end of the long hole 65 in front of the lifter 61 is supported. It is inserted into and coupled to the support (66) formed on the back of the second portion (61b), the other end is fixed to the friction pad 63 by pressing the lower end of the friction pad (63).

Hereinafter, a method and an operation of assembling / replacing the friction pad assembly of the paper pickup apparatus for a printing press according to the present invention will be described in detail.

First, as shown in FIG. 4 and FIG. 5, the lifter 61 is positioned in the through hole 51a of the frame 51, and the hinge axis, not shown, is positioned at the hinge point 61c of the second portion 61b. It fits and exposes to the through-hole 51a of the frame 51 (refer FIG. 6).

Thereafter, when the saddle portion 22 on which the friction pad 63 is seated is brought into close contact with the first portion 61a of the lifter 61, the saddle portion 62 is complementary to the lifter 61 by the main engagement means. Male and female are combined. That is, when the hook 73 of the saddle portion 62 is inserted into the coupling hole 69 of the pushing portion 67, the locking jaw 73a of the hook 73 is inserted into the coupling hole 69 and simultaneously caught. do. At this time, the auxiliary coupling means, that is, the support protrusion 74 of the second portion 61b is caught in the support groove 76 of the saddle portion 62, the insertion projection 77 formed in the lower rear portion of the saddle portion 62 Is further inserted into the insertion hole 75 formed in the first portion (61a) further strengthens the coupling force of the main coupling means.

When the coupling of the lifter 61 and the saddle portion 62 is completed, the support plate 78 is installed so that the friction pad 63 can be stably supported on the saddle portion 62. That is, one end of the support plate 78 is inserted into the long hole 65 in front of the lifter 61 to be coupled to the support 66. The other end of the support plate 78 clips the lower end of the friction pad 63. Since the support plate 78 is rounded to have an elastic force in the body itself, both ends of the support plate 78 have a strong elastic force acting around the rounding part supported by the long hole 65 to perform a clamping action.

Finally, the other end of the pressure spring 71, one end of which is fixed to the main body of the printer, is connected to the supporter 66 formed on the rear surface of the lifter 61. As a result, the lifter 61 is supported by the pressure spring 71 and elastically biased forward of the frame 51, and is lifted up and down as the pickup roller (50 in FIG. 6) is rotated.

Therefore, as shown in FIG. 6, the paper P is supported by the pickup roller 50 when the friction pad assembly 60 is supported by the hinge point 61c and down by the rotation of the pickup roller 50. The sheet is preloaded one by one and then passed between the pick-up roller 50 and the friction pad 63 to be fed to a subsequent supply target path. Here, the reference numeral 80 is a knock-up plate fixed to the frame 51 to lift one end of the paper P, and support the rotation of the pickup roller 50 to allow the paper P to enter.

On the contrary, as shown in FIG. 7, when replacing the friction pad 63, the replacement process is performed by reversely performing the assembly method as described above, but after removing the pickup roller (50 in FIG. 6), Press the projections 68 to enter approximately 1.5 to 2.0 mm by hand. Then, the coupling hole 69 of the pushing portion 67 is advanced in the right direction of the drawing, the hook 73 is caught by the jaw 73a in the coupling hole 69 is unlocked. Subsequently, when the projection 68 is pressed, the body of the saddle portion 62 is slid along the inclined surface of the rib 72 formed to be inclined and naturally lifted up. Then, the support plate 78 which clips the friction pad 63 is lifted, and the friction pad 63 seated on the saddle part 62 is pulled out.

Therefore, the friction pad assembly 60 according to the present invention presses the projections 68 of the pushing portion 67 in the periodic replacement of the friction pad 63, which is a consumable, and is easily replaced with minimal disassembly and assembly operations. It can be done.

In addition, the friction pad assembly 60 of the present invention separately includes a first clip member (28 in FIG. 2) and a second clip member (29 in FIG. 2) of the lifter (21 in FIG. 2) and the friction pad (23 in FIG. 2). Unlike the prior art, which was clipped using the support plate 78, in which the first clip member 28 and the second clip member 29 are integrated, the support plate 78 supports the lower end of the front surface of the friction pad 63. By removing the step, it is possible to smoothly guide the leading edge of the paper up-down during the pick-up operation, it is possible to block the paper jam. In addition, since the support plate 78 can make a fixed contact with the friction pad 63, the grounding performance of the pickup roller is improved, and the position of the friction pad can be prevented from being changed by external force.

As mentioned above, although this invention was demonstrated in detail through the specific Example, this invention is not limited to the said Example, A various design transformation is possible by those of ordinary skill in the range of the technical idea of this invention. .

As described above, the friction pad assembly of the paper pick-up device for a printing press according to the present invention is easily disassembled by a simple pushing operation, so that the replacement operation of the friction pad, which is a consumable, is easy, and the support efficiency of the friction pad is improved. And the grounding stability with the pick-up roller is improved, and the pick-up reliability of the paper is improved.

Claims (4)

It is installed on the frame provided in the main body of the printing machine is hinged to the intermediate region of the frame and the lifter is elastically biased forward through the frame, and the friction pad fixed to one side of the front of the lifter and in contact with the pickup roller seats In the friction pad assembly of the paper pick-up device for a printer having a saddle portion, The main coupling means formed on the lifter and the saddle portion and the saddle portion is male and female coupled to the lifter to transfer the loaded paper to the supply target path which is connected to the printing unit by being selectively pressure-contacted according to the rotation of the pickup roller. A friction pad assembly of a paper pickup device for a printing press. The method of claim 1, The main coupling means, A pushing portion formed integrally with the body of the lifter and supported by the body to enable a pressing operation by an elastic force, a coupling hole penetrating through one side of the pushing portion, and at least one rib formed to be inclined toward the coupling hole, Friction pad assembly of the paper pickup device for a printer, characterized in that it comprises a hook integrally formed on the back of the saddle portion and formed with a jaw to be coupled to the coupling hole. The method of claim 1, An auxiliary coupling means is further provided to reinforce the coupling force of the main coupling means, wherein the auxiliary coupling means includes one or more support protrusions protruding from one side of the front of the lifter and one or more insertion holes formed on the other side of the front of the lifter. And a support groove formed at an upper side of the saddle portion so as to correspond to the support protrusion, and an insertion protrusion formed at a rear lower end of the saddle portion so as to correspond to the insertion hole. Pad assembly. The method of claim 1, One end is inserted in front of the lifter to support the rear of the lifter, the other end is a friction pad assembly of the paper pickup device for a printer, characterized in that the support plate having an elastic force to clip the lower end of the friction pad.