CN104418145B - Device for transferring and image forming apparatus - Google Patents

Abstract

The present invention provides a kind of device for transferring and image forming apparatus.The device for transferring of discharge sheet material includes：Drive shaft is driven in rotation by driving source；Multiple driving revolving parts, are provided in the drive shaft；Revolving part, it is provided in the drive shaft, the overall diameter of overall diameter bigger with than the driving revolving part, by being formed with reference at least two cutting elements, and including stage portion, the stage portion is in the boundary portion of at least two cutting element, in the degree of the upstream side of the direction of rotation of revolving part bigger more radially projecting than the downstream side of the direction of rotation of the revolving part；And driven revolving part, it is crimped with the driving revolving part.

Description

Device for transferring and image forming apparatus

Technical field

The present invention relates to a kind of device for transferring for discharging sheet material.

Background technology

In the image forming apparatus of electrofax mode, electrostatic recording mode, return to zero etc., formed by image Unfixed toner image corresponding with image information is formed and is carried on recording materials by processing.It will by fixation facility Unfixed toner image is thermally fixed on recording materials as permanent image, afterwards, by the outlet of fixation facility Recording materials are transported to outside device by the device for transferring of part arrangement.

In device for transferring, multiple distributing rollers are attached to drive shaft at certain intervals, and by using in image shape The driving source being arranged into the main body of device carrys out rotation driving axis.Recording materials discharge roll-in by each distributing roller and with corresponding Between the driven voller connect, so as to which recording materials are discharged to outside device.

In some device for transferring, the position that distributing roller is not arranged on the driving shaft is equipped with reinforcement roller.Strengthen the outer of roller Diameter is more than the overall diameter of distributing roller.Further, since difference between strengthening the overall diameter of roller and distributing roller and on recording materials Form bending.As a result, when from the downstream side from conveying direction, recording materials have waveform.This improves be discharged to The loading features of recording materials after outside device.

Since the overall diameter for strengthening roller is more than the overall diameter of distributing roller, when drive shaft and reinforcement roller are integrally rotated When, strengthening occurring between roller and distributing roller the difference of peripheral speed.In order to avoid this difference, strengthening roller can be around driving Axis dallies.

In Japanese Unexamined Patent Publication 2006-151617 publications, do not account for strengthening roller to axis attaching (assembling).

The present invention proposes to solve the above problem, and it is intended to improve and strengthens assembling spy of the revolving part to axis Property.

The content of the invention

The representative configurations of device for transferring according to the present invention are to discharge the device for transferring of sheet material, which includes：Driving Axis is driven in rotation by driving source；Multiple driving revolving parts, are provided in the drive shaft；Revolving part is arranged In the drive shaft, there is the overall diameter than driving the overall diameter bigger of revolving part, by combining at least two cutting elements It is formed, and including stage portion, the stage portion is in the boundary portion of at least two cutting element, in the revolving part The degree of the upstream side of direction of rotation bigger more radially projecting than the downstream side of the direction of rotation of the revolving part；And driven rotation Turn part, crimped with the driving revolving part.

According to the description referring to the drawings to exemplary embodiment, other features of the invention will be apparent.

Description of the drawings

Fig. 1 is the sectional view for the structure for illustrating the image forming apparatus according to the present invention for being equipped with device for transferring.

Fig. 2 is the front view of the structure for the first embodiment for illustrating device for transferring according to the present invention.

Fig. 3 A are the side views of the reinforcement revolving part of the device for transferring of first embodiment when observation vertically.

Fig. 3 B are the sectional views along the line A-A interceptions of Fig. 3 A.

Fig. 4 A are the decomposition side views of the reinforcement revolving part of the device for transferring of first embodiment when observation vertically.

Fig. 4 B are the sectional views along the line B-B interceptions of Fig. 4 A.

Fig. 5 A are the sides of the reinforcement revolving part of the second embodiment of device for transferring according to the present invention when observation vertically View.

Fig. 5 B are the decomposition side views of the reinforcement revolving part of the device for transferring of second embodiment when observation vertically.

Fig. 6 is to illustrate the figure that recording materials are placed in state between the boundary portion with gap, wherein, the gap be by Caused by the backlash for strengthening the cutting element of revolving part.

Specific embodiment

It will be described in detail with reference to the accompanying drawings the embodiment of the image forming apparatus according to the present invention for being equipped with device for transferring.

[first embodiment] first, will describe the image according to the present invention for being equipped with device for transferring referring to figs. 1 to Fig. 4 B The structure of the first embodiment of forming apparatus.

The image forming apparatus 25 that [image forming apparatus] illustrates in Fig. 1 is the laser printing using electrofax mode Machine.Image forming apparatus 25 forms processing by image and unfixed toner image corresponding with image information is formed in note It records on material P, to carry the toner image on recording sheet P.By fixation facility 17 by unfixed toner image It is thermally fixed on the recording materialp for permanent image, afterwards, the recording materials P as sheet material is conveyed and set by discharge Standby 20 are discharged to the outside (outside of device) of image forming apparatus 25.

Image forming apparatus 25 provides equipment from the image information for being disposed in outside, host etc. and receives image letter Breath.Following a series of images formation is carried out by known electrofax mode to handle, i.e. on the recording materials P of sheet It is formed and records the toner image corresponding to the image information received.

When image forming apparatus 25 receives print signal, by with make a reservation for timing driving feed roller 14, from sheet material By recording sheet P, sheet material is fed respectively one by one in box 22.Feed roller 14 is configured with D-section, so that remembering in feeding After recording material P, pass through conveyings of the contact history material P without interfering recording materials P.Determined by registration roller 15 with predetermined control When the recording materials P that will have been fed from sheet material box 22, be fed into as the photosensitive drums 10 of image bearing member and conduct In the transfer nip N formed between the transfer roll 16 of transfer section.

In addition, when image forming apparatus 25 receives print signal, photosensitive drums 10 start to rotate.Photosensitive drums 10 are by aluminium There is photoconductive layer as OPC (organic photoconductor) on manufactured drum basal body, and by driving equipment (not illustrating) to make a reservation for Processing speed driving photosensitive drums 10 rotate in the direction of the arrow C of Fig. 1.

In addition, the charging roller 11 as charging part is by the charging bias that is applied by charging bias power supply (not illustrating), it is right Photosensitive drums 10 are uniformly charged to predetermined negative potential.In the first embodiment, to the exposure on the surface of photosensitive drums 10 Light portion carries out discharged-area development, and using so-called discharged-area development mode, therefore the potential to charge is negative.

By it is being exported from laser scanner 12, modulated according to the time series electronic digit picture element signal of image information Laser L, scan and the part of the charging on the surface of exposed photosensitive drum 10 be as exposure portion, and on the surface of photosensitive drums 10 Form electrostatic latent image corresponding with image information.In the exposure area on the surface of photosensitive drums 10, the electricity on the surface of photosensitive drums 10 Gesture is neutralized, and therefore, the potential on the surface of photosensitive drums 10 is opposite for just compared with surrounding.Therefore, in the surface shape of photosensitive drums 10 Into electrostatic latent image corresponding with image information.

Developing apparatus 13 enables electronegative toner to adhere to the shape on the surface of photosensitive drums 10 as developer Into electrostatic latent image, so as to charge image developing toner image.As the developing method for using developing apparatus 13, for example, there is such as lower section Method：The mixture of toner particle and magnetic carrier is used as developer, and attracts developer photosensitive to contact by magnetic force The surface of drum 10, so as to develop.

Transfer roll 16 as transfer section is formed by elastomeric element, is connected to the surface of photosensitive drums 10, and is being transferred When to transfer roll 16 apply transfer bias.

Transferred with toner image recording materials P after by fixation facility 17, toner image is thermally fixed, warp Device for transferring 20 is crossed, is discharged to the outside of the main body of image forming apparatus 25.

The remaining transfer toner on the surface of photosensitive drums 10 is cleaned by cleaning equipment 21, it is a series of so as to complete Image formation is handled.Forming the image forming part of image on the recording materialp includes photosensitive drums 10, charging roller 11, laser scanning Device 12, developing apparatus 13, transfer roll 16 and fixation facility 17 etc..

B referring to Figure 2 to Figure 4 now, is described the structure of the device for transferring 20 of first embodiment by [device for transferring].Fig. 2 is The front view of device for transferring 20 when observation on the conveying direction G in recording materials P.As shown in Figure 2, device for transferring 20 by with It is set to including discharge driving portion 18 and discharge follower 19.

In driving portion 18 is discharged, the drive shaft being driven in rotation by driving sources such as motors (not illustrating) is equipped 1, and distributing roller 2 is equipped so that it is integrally rotated with drive shaft 1, distributing roller 2 is used as and is attached to driving at certain intervals Multiple driving revolving parts of axis 1 (drive shaft).In addition, the location arrangements that distributing roller 2 is not arranged in drive shaft 1, which have, strengthens roller 4 As multiple reinforcement revolving parts.It will strengthen roller 4 so as to the mode of rotation is attached in drive shaft 1.Discharge driving portion 18 includes Drive shaft 1, distributing roller 2 and reinforcement roller 4.

Strengthen roller 4 and be configured with the overall diameter than 2 bigger of distributing roller.By the overall diameter of reinforcement roller 4 and distributing roller 2 it Between difference and form bending on the recording materialp.Recording materials P has when correspondingly, from the downstream side from conveying direction Waveform, this improves the loading features of the recording materials P after 25 outside of image forming apparatus is discharged to.Such as scheming Shown in 3A and Fig. 4 A, by combining at least two cutting element 4a and 4b, strengthening roller 4 has disc.

Discharge follower 19 is configured as including：It is arranged to the support shaft 23 substantially parallel with drive shaft 1；It is and driven Roller 3, as so as to the driven revolving part that the mode of rotation is supported by support shaft 23 and crimped with distributing roller 2.Pass through biasing Spring (not illustrating) etc. crimps driven voller 3 with distributing roller 2 respectively.Driven voller 3 is rotated with the rotation of distributing roller 2.Record Material P passes through between distributing roller 2 and driven voller 3, therefore recording materials P is transported to the outside of image forming apparatus 25.

It is such as shown in Figure 4 A, it is formed in a manner of being divided into semi-circle shaped elements 4a and 4b and strengthens roller 4.Correspondingly, i.e., Make after distributing roller 2 is attached to drive shaft 1, also element 4a and 4b can be attached to drive shaft 1, therefore improve reinforcement Roller 4 is to the assembly properties of drive shaft 1.The bearing fit portion 26 of element 4a and 4b are from the both sides of the radial direction of drive shaft 1 and drive shaft 1 Outer circumference surface cooperation, and the protrusion 8 as sticking department is disposed of from the element 4a's and 4b shown in Fig. 4 A and Fig. 4 B One end face of boundary portion 24 protrudes, and is locked to the hook portion 9 for being disposed in other end.Therefore, it is possible to by element 4a and The boundary portion 24 of 4b is bonded to each other and assembles.

In the first embodiment, such as shown in figures 4 a and 4b, the shape in a manner of being divided into semi-circle shaped elements 4a and 4b Into reinforcement roller 4 include：Protrusion can be dismounted each other in the end face of the boundary portion 24 of element 4a and 4b, as sticking department 8 and hook portion 9.Protrusion 8 is configured as flexible deformation so that it is locked to hook portion 9.

By the both sides of the radial direction from drive shaft 1 make the bearing fit portion 26 of element 4a and 4b coordinate and by protrusion 8 and hang Hook portion 9 is hooked together to be locked to each other, and element 4a and 4b are combined together to form disc.Note that with reference to semi-circle shaped elements The method of 4a and 4b is not limited by the combination of protrusion 8 and hook portion 9.It can also use using the complete of adhesive, screw etc. It is fixed to be used as associated methods.

Fig. 3 A are the sides of the discharge driving portion 18 shown in fig. 2 when the right side along the direction of drive shaft 1 from Fig. 2 View.As shown in figure 3 a, in the boundary portion 24 of cutting element 4a and 4b of roller 4 is strengthened, strengthening the direction of rotation of roller 4 The upstream side of (by the direction instruction of the arrow F of Fig. 3 A) is equipped along the radially projecting stage portion 7a for strengthening roller 4.It is real first It applies in example, as shown in fig. 3, is equipped with cutting portion 7b in the boundary portion 24 of cutting element 4a and 4b of roller 4 is strengthened, cuts off Portion 7b is formed by cutting off the bending section in the part being connected with stage portion 7a, so as to flat surfaces.Therefore, platform Rank portion 7a is radially projecting along reinforcement roller 4.

As a result, as shown in fig. 3, recording materials P is contacted first along the radially projecting stage portion 7a for strengthening roller 4, and It is promoted to control its direct of travel by stage portion 7a.Therefore, the front end of recording materials P is not inserted into the segmentation due to strengthening roller 4 Gap caused by backlash between the boundary portion 24 of element 4a and 4b, therefore front end is neither placed in nor sinks into therebetween.

Fig. 6 instantiates comparative example.As shown in FIG. 6, the shape in a manner of being divided into semi-circle shaped elements 44a and 44b Into reinforcement roller 44.In the comparative example of Fig. 6, when the reinforcement formed with partitioning scheme roller 44 is assembled to drive shaft 41, Gap is formed between the boundary portion 424 of cutting element 44a and 44b.The overall diameter for strengthening roller 44 is configured as more than distributing roller 2 Overall diameter, therefore recording materials P is contacted strengthen roller 44 first.

At this moment, as shown in FIG. 6, there are following possibility：Recording materials P can be placed in or sink into have due to segmentation Between the boundary portion 424 in gap caused by the backlash of element 44a and 44b.As a result, there may be following situations：Occurrence record material The blocking for expecting P or cut on the recording materialp.On the contrary, in the first embodiment, it is such as shown in figure 3 a, in boundary portion 24 In be formed with along strengthen roller 4 radially projecting stage portion 7a.Therefore, the front end for less paying close attention to recording materials P is trapped within side Portion of boundary 24.Therefore, the blocking for being unlikely to occur recording materials P or cut on the recording materialp.

In addition, in order not to which recording materials P is made to be placed between the boundary portion 24 by the cutting element 4a and 4b of reinforcement roller 4 Between gap caused by backlash, contact history material first is configured as along the radially projecting stage portion 7a needs for strengthening roller 4 P.For this purpose, the direction of rotation for strengthening roller 4 is disposed in (by the arrow of Fig. 3 A along the radially projecting stage portion 7a needs for strengthening roller 4 Head F direction instruction) upstream side.By the structure with reference to Fig. 3 B descriptions for above-mentioned arrangement.

Fig. 3 B are the sectional views along the line A-A interceptions of Fig. 3 A.As shown in Figure 3B, roller 4 is strengthened in axial direction to limit Movement in (horizontal direction of Fig. 3 B), the reinforcement roller 4 being equipped in drive shaft 1 (drive shaft) along on the both sides for strengthening roller 4 It is radially projecting, as first protrusion at least two protrusion 6a and 6b.Correspondingly, strengthen roller 4 and be placed in raised 6a and 6b Between so that movement of the roller 4 in the direction of drive shaft 1 (horizontal direction of Fig. 3 B) is strengthened in limitation.

It is different strengthening the both sides of roller 4, raised 6a and 6b along the overhang for the radial direction for strengthening roller 4.Implement first In example, the overhang of raised 6a along the radial direction for strengthening roller 4 is set to larger than overhangs of the raised 6b along the radial direction for strengthening roller 4. The raised 6a and 6b of first embodiment are formed with the disc of different overall diameters.

On the other hand, it is equipped with the conduct second axially protruded at least one side in the axial direction for strengthening roller 4 The protrusion 5 of protrusion.The protrusion 5 of first embodiment is formed following continuous circular：Strengthen the pivot (drive shaft of roller 4 1) be the continuous circular center.As shown in Figure 3A, in the boundary portion 24 of cutting element 4a and 4b of roller 4 is strengthened, along reinforcement The direction of rotation that the radially projecting stage portion 7a of roller 4 is assembled to be arranged in reinforcement roller 4 (is referred to by the direction of the arrow F of Fig. 3 A Show) upstream side.At this moment, as shown in FIG 3 B, it is disposed of the outer circumference surface protrusion from drive shaft 1 and with small protrusion The raised 6b of amount is suitble to be arranged to the inner peripheral surface 5a than protrusion 5 closer to drive shaft 1, and protrusion 5 is disposed of from reinforcement roller 4 side is prominent and with annular.

Although not illustrating, assume that the boundary portion 24 of the cutting element 4a and 4b of roller 4 are strengthened in assembling so that along reinforcement roller 4 Radially projecting stage portion 7a be disposed in strengthen roller 4 direction of rotation (by the direction instruction of the arrow F of Fig. 3 A) upstream Side.At this moment, in figure 3 a, assembled so that the direction of rotation for strengthening roller 4 is opposite with the direction of the arrow F of Fig. 3 A.This In the case of, the protrusion 5 of shown reinforcement roller 4 is towards the left side of Fig. 3 B in figure 3b.In addition, it is disposed of from the outer of drive shaft 1 Periphery is prominent and has the raised 6a of big overhang, with being disposed of from the side surface protrusion for strengthening roller 4 and having The protrusion 5 of annular is interfered.It is thus impossible to it is enough assembled.

In this configuration, it can prevent that the cutting element 4a and 4b for strengthening roller 4 from mistakenly being assembled.In addition, strengthening roller 4 Direction of rotation (by the direction instruction of the arrow F of Fig. 3 A) upstream side, along strengthen roller 4 radially projecting stage portion 7a can It is disposed in the boundary portion 24 of the cutting element 4a and 4b that strengthen roller 4.

Therefore, in the boundary portion 24 of cutting element 4a and 4b of roller 4 is strengthened, along the radially projecting step for strengthening roller 4 Portion 7a being capable of contact history material P first.Correspondingly, the front end of recording materials P is not inserted into the cutting element 4a by reinforcement roller 4 Gap caused by backlash between the boundary portion 24 of 4b, therefore front end is neither placed in nor sinks into therebetween.

According to said structure, it can prevent the roller 4 of strengthening formed with partitioning scheme from being assembled in the direction of mistake.It can prevent Gap caused by generation is placed in the backlash between the boundary portion 24 as the cutting element 4a and 4b of reinforcement roller 4 as recording materials P Caused by, the cut on the blocking of recording materials P or recording materials P.

Note that it is only radially example from the raised 6a and 6b of the outer circumference surface protrusion of drive shaft 1.It in addition, for example, can The outer circumference surface of drive shaft 1 is press-fit into the axis for being made of metal spring catch etc..In addition, in the outer of drive shaft 1 Periphery forms asymmetric component and is placed in therebetween with that will strengthen roller 4, can have same effect.

[second embodiment] by the image according to the present invention for being equipped with device for transferring is described with reference to Fig. 5 next, form The structure of the second embodiment of device.The structure identical with first embodiment is by same reference numeral or same name of parts Claim to represent (even if reference numeral is different), descriptions thereof will not be repeated.

In the first embodiment, roller 4 is strengthened in order to which edge is arranged in the boundary portion 24 of cutting element 4a and 4b of roller 4 is strengthened Radially projecting stage portion 7a, be arranged by cutting off the bending section in the part being connected with stage portion 7a to be formed has The cutting portion 7b of flat surfaces.In a second embodiment, as shown in figs. 5 a and 5b, strengthen roller 4 cutting element 4a and In the boundary portion 24 of 4b, it will be set in the distance r1 and r2 of radial direction from pivot E to the outer circumference surface of strengthening roller 4 for strengthening roller 4 It is set to difference.

In second implements, from the pivot E of roller 4 is strengthened to the boundary portion of cutting element 4a and 4b in reinforcement roller 4 In 24, along strengthen roller 4 radially projecting stage portion 7a distance r1 it is as follows.That is, distance r1 is set greater than from rotation Heart E to the distance r2 along the stage portion 7c being radially recessed for strengthening roller 4.

As described above, distance r1 and r2 are arranged to r1>r2.Correspondingly, on the side for the cutting element 4a and 4b for strengthening roller 4 In boundary part 24, along the radially projecting stage portion 7a contact history material P first for strengthening roller 4.Correspondingly, recording materials P Front end is not inserted into the gap as caused by the backlash between the boundary portion 24 of the cutting element 4a and 4b of reinforcement roller 4, therefore, front end It is neither placed in nor sinks into therebetween.Other structures are identical with the structure of first embodiment, can obtain same effect.

In first and second embodiment the two, instantiate and be divided into two-part reinforcement roller 4.However, it is also possible to make The element of three or four parts is divided into used in circumferencial direction.

Although with reference to exemplary embodiment, invention has been described, but it is to be understood that public the invention is not restricted to institute The exemplary embodiment opened.Scope of the appended claims meets most wide explanation so that its cover all this modifications and Equivalent structure and function.

This application claims the priority for the Japanese patent application 2013-169328 that August in 2013 is submitted on the 19th, this application Full content be incorporated herein by reference.

Claims (2)

1. a kind of device for transferring for discharging sheet material, the device for transferring include：

Drive shaft is driven in rotation by driving source；

Multiple driving revolving parts, are provided in the drive shaft；

Revolving part is provided in the drive shaft, is had the overall diameter of the overall diameter bigger than the driving revolving part, is led to It crosses with reference to the second element abutted including first element and on the direction of rotation of the revolving part with the first element extremely Few two cutting elements are formed, and the upstream end including the downstream by the first element and the second element is described The stage portion formed on the direction of rotation of revolving part, the downstream of the first element than the second element it is described on Degree of the end along the radially projecting bigger of the revolving part is swum, the second element does not have the excircle from the second element The protruding portion that face protrudes, and slot is formed with the downstream of the first element, when the axis direction sight from the drive shaft When examining the revolving part, the revolving part has disc；And

Driven revolving part is crimped with the driving revolving part.

2. a kind of image forming apparatus, which includes：

Image forming part forms image on sheet material；And

Device for transferring according to claim 1 will be formed with the sheet material of image by described image forming portion, row Go out the outside to described image forming apparatus.