JP2010110180A - Harness wiring structure and image reading device using the same and finisher device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a harness wiring structure for harness connecting a traveling unit and a circuit board electrically, in which less load variation occurs at a time of extension/shrinkage and disconnection rarely occurs. <P>SOLUTION: A cable length adjusting means expanding and contracting the harness in a predetermined curved shape, is prepared, when the harness connects electrically between the traveling unit reciprocating in a predetermined work area, and the circuit board supplying power to the unit or transmitting/receiving a signal to/from the unit. The adjusting means is constituted of a support member disposed reciprocatingly movable between predetermined locations for supporting the harness, an energizing member energizing the support member in one direction, and a traction member limiting an urging force acting onto the support member. The length of the harness and the length of the traction member are set to a length in which a tensile force acting on the support member from an urging means, acts onto the traction member side but does not act or slightly acts onto the harness side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an improvement in the wiring structure of a harness that supplies power from a circuit board or transmits and receives control signals to a traveling unit such as a carriage that reciprocates at a predetermined stroke, such as an image reading device or a finisher device.

  In general, a scanning carriage in an image reading device, a post-processing device in a finisher device, a punching unit, a stamp unit, a stapler unit, and the like are attached to an apparatus frame so as to reciprocate with a predetermined stroke. In the case of an image reading device (scanner device), a light source, a reflection mirror, and the like are mounted on the carriage to scan (scan) the original image on the platen. In the case of a post-processing apparatus, post-processing means such as a stapler, punch, stamp, etc. are configured to be movable along the edge of the processed paper sheet, and post-processing (at one or a plurality of positions) on the sheet ( (Finishing process).

  Thus, the traveling unit that reciprocates at a predetermined stroke and the circuit boards such as the power supply board and the control board arranged on the apparatus frame side are electrically connected by a harness. The harness supplies power to equipment (for example, a drive motor) mounted on the traveling unit. Moreover, the detection signal from the apparatus (for example, sensor) mounted in the traveling unit is received. Alternatively, command signals are transmitted and received between the traveling unit and the control board.

  Therefore, the mechanical strength of the harness described above becomes a problem. For example, Patent Document 1 points out the following problem when the harness is configured by flexible printed wiring. Each time the traveling unit reciprocates the flexible printed wiring, if the bending and tension generated in the wiring are repeated in a free wiring shape, if a local bent part is generated in the wiring, it is disconnected from this part by the repetition. Is a problem.

At the same time as this disconnection problem, if the harness is configured in a free wiring shape by reciprocating movement of the traveling unit, it acts on the traveling unit depending on whether the harness is curved with a gentle curve or curved with a steep curve. The load fluctuates. The load fluctuation caused by the harness causes vibration in the traveling unit, and in particular, in the scanning mechanism of the image reading apparatus, the reading image quality is deteriorated.

  Therefore, in the apparatus of Patent Document 1, it has been proposed to provide a flexible member that can be elastically deformed inside the curved side of the printed wiring board. With this flexible member (elastic plate), the printed wiring board is always bent in a fixed shape in a fixed direction, and does not cause a problem of disconnection or load fluctuation.

As a conventional harness wiring structure, the following structure is also known when a traveling unit and a circuit board are connected by a printed board, a single lead wire, a lead wire bundle, a flat cable, or the like. The central part of the harness connecting the traveling unit and the printed circuit board is wound around a pulley and curved in a U shape, and the pulley is slidably supported so as to be movable in the traveling direction of the traveling unit. A connection structure (hereinafter referred to as “conventional example 2”) that urges in one direction is known.
Japanese Utility Model Publication No. 06-013574 (FIGS. 4 and 7)

  As described above, as a harness wiring structure that electrically connects a traveling unit that reciprocates with a predetermined stroke and a circuit board, a lining that conventionally controls the wiring shape integrally with the harness as disclosed in Patent Document 1 above. A member in which a spring member (a flexible member of the same publication) is arranged is known.

  Further, as in the above-described conventional example 2, a slide member that is movable within a predetermined range in the moving direction of the traveling unit is provided, a pulley around which a harness is wound is provided, and the slide member is attached in one direction by the urging means. A striking structure is known.

  Such a conventional harness wiring structure has the following problems. First, in the structure of the cited document 1, a lining spring member is provided integrally with the harness, and in the structure that prevents the harness from being deformed into an unspecified shape, the traveling unit includes a load of the unit itself and a deformation load of the harness, Furthermore, the deformation load of the lining spring member acts. For this reason, the load exerted on the traveling unit by the harness and the lining spring member greatly fluctuates when the harness is loosened and tightly contracted. That is, in a state where the harness is contracted, the load due to the contraction deformation of the line itself and the lining spring member affects the traveling unit as a load fluctuation. For this reason, for example, in the case of an image reading apparatus, problems such as image blurring occur in the read image.

  Further, in the structure of the above-described conventional example 2, the harness is curved in a U shape by a slide member such as a pulley, and this slide member is pulled by a biasing spring, so that the force of the tension spring always acts on the harness. ing. Therefore, there is a problem that a harness that is always subjected to a pulling force such as a spring easily breaks when the device is used and when the device is not used. In this case, it is conceivable to configure the harness to have a strength that can withstand this disconnection. However, if the rigidity of the harness is increased, there is a problem in that the load fluctuation exerted on the traveling unit increases due to the deformation of the harness.

  Therefore, the inventor holds a harness such as a printed circuit board or a flat wire of a lead wire bundle in a predetermined curved shape with a support member such as a pulley or a roller, and pulls the support member with a biasing spring. A traction member different from the traction member was provided, and the idea of receiving the urging force of the urging spring with this traction member was reached.

  The present invention provides a harness wiring structure in which a traveling unit that reciprocates at a predetermined stroke and a circuit board are electrically connected to each other with less fluctuation in load on the traveling unit when the harness is extended and contracted, and the reciprocating motion of the harness. The main issue is to provide a harness wiring structure that is less likely to break.

  The main object of the present invention is to provide a harness wiring structure in which a harness for electrically connecting a traveling unit and a circuit board has less load fluctuation when stretched on the traveling unit and is less likely to be disconnected at the same time. It is said.

  In the present invention, the “harness” means a wire wire that transmits electricity or an electric signal, and a flexible printed wiring, and the wire wire includes a plurality of bundles of lead wires such as a single lead wire and a flat harness.

  To achieve the above object, the present invention employs the following configuration. In the present invention, when a traveling unit that reciprocates in a predetermined work area and a circuit board that supplies power to the unit or transmits / receives signals to / from the unit are electrically connected by the harness, the harness is expanded and contracted in a predetermined curved shape. A cable length adjusting means is provided. The adjusting means limits a support member arranged to reciprocate within a predetermined distance to support the harness, a biasing member that biases the support member in one direction, and a biasing force that acts on the support member. It consists of a traction member. Then, the length of the harness and the length of the traction member are set to a length in which the tensile tension acting on the support member from the urging means acts on the traction member side and does not act on the harness side or acts on the harness side.

  A harness wiring structure that connects a traveling unit that reciprocates with a predetermined stroke and a circuit board, and is fixed to the apparatus frame, a traveling unit that reciprocates in a predetermined work area set in the apparatus frame, and the apparatus frame. A circuit board that supplies power to the traveling unit and / or transmits and receives signals, a harness that electrically connects the circuit board and the traveling unit, and a cable length that curves the harness as the traveling unit reciprocates. Adjusting means. The cable length adjusting means includes a support member that is arranged to be reciprocable between a predetermined distance and supports the harness, a biasing member that biases the support member in one direction, the support member, and the device frame. And a traction member that restricts the urging force that acts on the support member, and the length of the harness and the length of the traction member are the tensile tension that acts on the support member from the urging member. Acts on the traction member side, and does not act on the harness side or is set to a length that acts with a reduction.

  The traction member and the harness are fixed to a circuit board having a base end fixed to the device frame, and a distal end is fixed to the traveling unit. The length of the traction member is longer than the length of the harness. Set it short.

  The support member includes a slide member that is slidably attached to the device frame, and a pulley member that is attached to the slide member and points to the harness cable. The biasing member includes the device frame and the device frame. It consists of a tension spring suspended between the slide member.

  The harness has one end fixed to the circuit board and the other end fixed to the traveling unit, and an intermediate portion thereof is wound around the pulley and supported in a substantially U shape, and the traction member has one end connected to the circuit. The other end of the board is fixedly supported by the traveling unit, and an intermediate part thereof is wound around the pulley and supported in a substantially U shape. At this time, the length of the pulling member is set to be shorter than the length of the harness, and the harness is wound in a U shape with a gap formed on the outer periphery of the pulley.

  An image reading apparatus according to the present invention includes an apparatus frame, a guide rail disposed on the apparatus frame, a carriage that reciprocates along a predetermined image reading area along the guide rail, and the image reading apparatus disposed on the carriage. A light source for irradiating light on the document image in the area, lens means for condensing reflected light from the document image on a predetermined imaging surface, and photoelectric conversion of light from the lens means arranged on the imaging surface Photoelectric conversion means; a circuit board that supplies power to the light source; a harness that electrically connects the circuit board and the carriage; and a cable length adjustment means that curves the harness as the carriage reciprocates. Is provided. The cable length adjusting means includes a support member that is arranged to be reciprocable between a predetermined distance and supports the harness, a biasing member that biases the support member in one direction, the support member, and the device frame. And a traction member that restricts the urging force that acts on the support member, and the length of the harness and the length of the traction member are the tensile tension that acts on the support member from the urging member. Acts on the traction member side, and does not act on the harness side or is set to a length that acts with a reduction.

  The circuit board is fixed to a chassis arranged on the apparatus frame, and the photoelectric conversion means and a power supply circuit for supplying power to the light source are arranged on the circuit board.

  The finisher according to the present invention includes a processing tray for temporarily holding a single sheet or a bundle of sheets, post-processing means for performing post-processing such as binding processing, stamping processing, punching processing on sheets on the processing tray; A traveling unit that reciprocates the post-processing means along the edge of the sheet on the processing tray, a circuit board that supplies driving power to the post-processing means, and the circuit board and the post-processing means are electrically connected. And a cable length adjusting means for bending the harness as the traveling unit reciprocates, and the cable length adjusting means is disposed so as to be able to reciprocate within a predetermined distance and supports the harness. A support member, an urging member that urges the support member in one direction, and the support member and the device frame disposed between the support member and the support member; A traction member that restricts the urging force to be applied, and the tensile force that acts on the support member from the urging member acts on the traction member side and does not act on the harness side or acts to reduce the length. Set to

  The post-processing means is configured by a stapler that staples a bundle of sheets stacked on the processing tray.

  The present invention provides a harness that electrically connects a traveling unit and a circuit board, a support member that supports the wire member and curves into a predetermined shape, and a biasing member that biases the support member in one direction. Since the traction member for limiting the urging force acting on the support member is provided, the following effects can be obtained.

  Since the harness is supported by the support member so as to expand and contract in a predetermined curved shape by the reciprocating motion of the traveling unit, the harness is smoothly expanded and contracted without being twisted or refracted, and this affects the traveling unit. Load fluctuation can be reduced.

  Further, the harness is provided with a support member that supports a predetermined curved shape. The support member is urged in one direction by urging means, and the urging force acts on the traction member side so that the urging force acts on the traction member side. The length of is set. Therefore, even if the traveling unit is reciprocated repeatedly, the harness is not twisted or bent, stress such as a spring (internal stress) does not act, and disconnection is less likely to occur.

  The present invention will be described in detail below based on the preferred embodiments shown in the drawings. FIG. 1 is a perspective view showing an overall configuration of a harness wiring structure according to the present invention, and FIG. 2 is an explanatory diagram showing a concept of the harness wiring structure. FIG. 3 is an explanatory view showing the structure of the harness, and FIG. 4 is an operation state explanatory view of the traveling unit in the harness wiring structure of the present invention.

[Harness wiring structure]
The harness wiring structure according to the present invention supplies power to a traveling unit 20 that reciprocates in a predetermined work area 15 and components (such as a light source 23a and a post-processing means 25 described later) mounted on the traveling unit 20. A circuit board 30 that transmits and receives various signals, a harness 40 that electrically connects the circuit board 30 and components of the traveling unit 20, and a cable length that adjusts the length of the harness 40 as the traveling unit 20 reciprocates. And a height adjusting means 45. Each configuration will be described sequentially.

  The work area 15 is provided with a processing stage in the apparatus frame, and the work area 15 is set in this stage. The work area 15 of the image reading apparatus A in FIG. 5 is arranged on the reading platen 5, and the work area 15 of the finisher apparatus B in FIG. 6 is set in a processing tray 10 described later.

  The traveling unit 20 includes a unit that reciprocates within a work area set in the apparatus frame 2, and includes a carriage 21 in the image reading apparatus A in FIG. 5 and a post-processing means 25 in the finisher apparatus B in FIG. ing. The traveling unit 20 is supported so as to reciprocate between the work areas 15 with a stroke L0 as shown in FIG. Therefore, a guide rail 12 is laid on the apparatus frame 2, and a traveling unit 20 is engaged and supported on the guide rail 12.

  Although the structure of the traveling unit 20 differs depending on the system configuration, in the case of the image reading apparatus A, a box-shaped unit frame 22 is provided, and a light source lamp storage unit 23 and a reflection mirror storage unit 24 are provided on the unit frame. In the apparatus shown in FIG. 5, a light source lamp 23a for irradiating light on a document image on a platen and a reflection mirror 24a are mounted on a carriage (running unit) 21 (20), and light from the reflection mirror 24a is converted into a photoelectric conversion element. The above-described light source lamp 23a and reflection mirror 24a are mounted on the carriage 21 because of the scanner configuration in which the lens unit 17 and the photoelectric conversion element 18 that are imaged on the apparatus frame side are arranged. In addition, a configuration in which the light source lamp 23a, the reflection mirror 24a, the lens unit 17, and the photoelectric conversion element 18 are mounted on the carriage 21 can be employed.

  Therefore, the traveling unit 20 having a configuration suitable for the purpose as described above is placed and supported on the guide rails 12 arranged on the apparatus frame 2 in a pair of front and rear, and is supported so as to be movable in the left-right direction in FIG. A unit moving motor (driving motor) Mu that reciprocates the traveling unit 20 at a predetermined speed and a winding wire 26 are disposed in the apparatus frame 2. The winding wire 26 is wound around the pair of left and right pulleys 27a and 27b so that the traveling unit 20 reciprocates between the home position (right end in FIG. 5) Hp and the return position (left end in FIG. 5) Rp. Is overlaid. The unit moving motor Mu is connected to the one pulley 27b.

  The circuit board 30 is disposed on the bottom chassis 2 c of the device frame 2. The circuit board 30 is provided with a mounting board 32 for the photoelectric conversion element 18 and a power supply circuit 33 for various actuators Ma. The photoelectric conversion element 18 is composed of a CCD (charge coupled device) and is fixed to an attachment substrate 32 provided on the circuit substrate 30. The power supply circuit 33 includes a driver circuit that supplies power to an actuator (motor, solenoid) such as a light source lamp and a staple drive motor mounted on the traveling unit 20 described above. In addition, the circuit board 30 includes a control signal transmission circuit (not shown) of a processing unit mounted on the traveling unit 20 and a receiving circuit (not illustrated) that receives a detection signal of a device such as a sensor mounted on the traveling unit 20. ) Is arranged.

  Various wires can be used for the harness 40 that electrically connects the circuit board 30 and the traveling unit 20 described above. For example, in order to electrically connect the circuit board 30 and the actuator of the traveling unit 20, the harness 40 may be composed of a single lead wire 40 a, but a bundled lead wire 40 b in which a plurality of lead wires are bundled together. It may be configured by a flat cable 40c in which a plurality of lead wires are bound in a strip shape, or may be configured by a flexible printed wiring board 40d. That is, various cable structures can be employed for the harness 40 as long as the power supply, the control signal, and the detection signal can be transmitted and received between the circuit board 30 and the traveling unit 20.

  Therefore, the harness 40 is connected to a connector 41 whose base end portion 40x (right end in FIG. 1) is arranged on the circuit board 30, and its distal end portion 40y (left end in FIG. 1) is connected to a connector 42 arranged in the traveling unit 20. Yes. Therefore, the length Lh of the harness 40 is set longer than the moving stroke L0 of the traveling unit 20. The harness 40 is made of a flexible material (for example, a copper fine wire and a resin tube) so as to be elastically deformable, and changes its shape as the traveling unit 20 moves.

[Cable length adjustment means]
Since the distance between the traveling unit 20 and the circuit board 30 changes as the traveling unit 20 moves, the harness 40 may be twisted, locally bent and bent, or caught by another structure. There is. For this reason, it is necessary to adjust the length of the cable wire 40 so as to expand and contract in a predetermined shape. Therefore, the present invention is provided with the following cable length adjusting means 45. The cable length adjusting means 45 includes a support member 46, an urging means 47, and a pulling member 48.

[Support material]
The support member 46 includes a slide member 50 that can slide on the apparatus frame 2 with a predetermined stroke. As shown in FIG. 1, guide pins 7 are implanted in the side plate 2a of the apparatus frame formed in a box shape. A long groove 50 g of the slide member 50 is fitted to the guide pin 7. Accordingly, the slide member 50 can move in the left-right direction in FIG. 1 along the guide pins 7. The moving stroke LS of the slide member 50 is about ½ of the moving stroke L0 of the traveling unit (the reason will be described later).

  A pulley member 51 is axially supported by the slide member 50. And the above-mentioned harness 40 is wound and supported by the outer periphery of this pulley member 51 in a U shape. This pulley member 51 is for holding the harness 40 in a U-shape with a predetermined curvature at its arc-shaped outer peripheral portion, and may be a roller or a semicircular bent piece in addition to the pulley.

[Energizing means]
The slide member 50 is provided with a biasing means 47 that biases the slide member 50 toward the tension side of the harness 40. The illustrated urging means 47 is constituted by a tension spring, one end of which is fixed to the side plate 2 a of the apparatus frame, and the other end is fixed to the slide member 50. Therefore, the slide member 50 that pivotally supports the pulley member 51 receives a biasing force on the tension side (the left side in FIG. 1) of the harness 40 by the biasing means 47.

[Towing member]
When applying tension in the pulling direction to the pulley member 51 that supports the harness 40 by the biasing means 47, if this tension is directly applied to the harness 40, internal stress (stress) is generated, and in this state, bending deformation occurs. If it repeats, it may break. Therefore, the present invention is characterized in that the following pulling member 48 is provided so that the tension of the biasing means 47 does not reach the harness 40 directly.

  The pulling member 48 is disposed between the harness 40 wound around the pulley member 51 in a U shape and the pulley member 51. The pulling member 48 is composed of a wire member or a belt member such as metal, resin, cloth, and leather. The pulling member 48 is made of a material rich in rigidity that is flexible and easily elastically deformed in the bending direction and does not elastically deform in the pulling direction (length direction).

  The base end portion 48x of the pulling member 48 is fixed to the same position in the vicinity of the connector 41 of the circuit board 30 together with the harness 40 described above. Further, the front end portion 48y is substantially fixed at the same location in the vicinity of the connector 42 of the traveling unit 20 connecting the front end portion 40y of the harness 40.

  Therefore, the length relationship between the harness 40 and the pulling member 48 will be described. The relationship between the length Lw of the traction member and the length Lh of the harness is that the tensile tension Fs (see FIG. 2) acting on the support member 46 from the urging member 47 acts on the traction member 48 side, and on the harness 40 side. Is set to a length that does not work. That is, in the illustrated embodiment in which the base end portion 40x (48x) and the distal end portion 40y (48y) are fixed at substantially the same location, the length Lh of the harness is set longer than the length Lw of the pulling member (Lh> Lw). ing.

  When the lengths of the harness 40 and the pulling member 48 are set as described above, the following operation is obtained. The urging force of the urging means 47 acts as a force for moving the slide member 50 and the pulley member 51 leftward in FIG. At this time, the pulling member 48 is stretched between the circuit board 30, the pulley member 51, and the traveling unit 20. The length Lw of the pulling member is set shorter than the length Lh of the harness. Therefore, the urging force of the urging means 47 acts on the traction member 48 side and does not act on the harness side. As a result, the harness 40 does not generate internal stress such as tension, and is not broken by repeated curved deformation.

  In such a relationship between the harness 40 and the traction member 48, the harness 40 needs to be supported by the support member 46 and / or the traction member 48. In the illustrated example, the harness 40 is engaged and supported by a slide member 50 that constitutes a support member 46 to maintain a U-shaped shape. That is, the harness 40 that is loosely wound around the outer periphery of the pulley member 51 in a U-shape is restricted in movement in the vertical direction by the bent portion 50 c of the slide member 50.

  In the present invention, the harness 40 and the traction member 48 have been described with respect to the manner in which both ends are fixed to the same place (circuit board and traveling unit). For example, the base end portion 48x of the traction member 48 is a circuit board. In this case, the length Lh of the harness and the length Lw of the pulling member may not be in a relationship of Lh> Lw. At this time, the urging force from the urging means 47 to the pulley member 51 is set to a length that acts as a tension on the traction member side.

  Furthermore, in the present invention, the length Lh of the harness and the length Lw of the traction member are set to be substantially equal (Lh≈Lw), or the length Lh of the harness is shorter than the length Lw of the traction member. It is also possible to set (Lh <Lw). This means that the above-described length relationship (Lh> Lw) may collapse due to the elastic deformation between the harness 40 and the pulling member 48. In this case, the elastic limit length Lhmax of the harness is set longer than the length Lw of the traction member. As described above, the present invention is characterized in that the urging force from the urging means 47 to the harness 40 is reduced by the traction member 48. And (1) When the harness and the pulling member are made of a material having high rigidity that is not elastically deformed, the length Lh of the harness is set longer than the length Lw of the pulling member (Lh> Lw). (2) When the harness and the pulling member are elastically deformed materials, the elastic limit length Lhmax of the harness is set longer than the length Lw of the pulling member (Lhmax> Lw).

  Further, as shown in FIG. 2C, when the spring force of the urging member 47 is activated by the movement of the slide member 50, the tension Fs acts on the pulley member 51. The tension Fs of the pulley member 51 acts on the traction member 48, and the tension is distributed in the circuit board side direction and the traveling unit side direction so that the tension 1 / 2Fs acts on the traction member 48 in each direction. Yes. Further, in the U-shaped portion where the pulling member 48 and the pulley member 51 are engaged, a gap g is formed between the pulling member 48 and the harness 40, and the spring force of the biasing member 47 acts on the harness 40. Absent.

[Image reading device]
Next, the configuration of the image reading apparatus using the above-described harness wiring structure will be described. An image reading apparatus A shown in FIG. 5 includes a casing 6, a reading platen 5 disposed on the upper plane of the casing 6, a carriage 21, and a photoelectric conversion element 18. The reading platen 5 such as glass is arranged on the upper plane of the casing 21 that is appropriately formed in a box shape or the like. A reading area (working area) is set in the reading platen 5, and a carriage 21 is built under the area so as to reciprocate. As described above, the carriage 21 is provided with the light source lamp accommodating portion 23 and the reflecting mirror accommodating portion 24 in the unit frame 22 so that the light source lamp 23a and the reflecting mirror 24a can be mounted thereon. The unit frame 22 is made of a resin material having excellent heat resistance such as an epoxy resin having excellent thermal characteristics and high mechanical strength. A connector (not shown) is arranged on the carriage 21 to supply power to the light source lamp 23a from a circuit board 30 described later.

  The carriage 21 is supported by a guide rail 12 disposed on the apparatus frame 2 built in the casing 6. Accordingly, the carriage 21 is supported along the reading platen (working area) 5 so as to be able to reciprocate. A circuit board 30 is arranged on the bottom chassis 2 c of the device frame 2, and an external power source is connected to the circuit board 30. The apparatus frame 2 has a pair of pulleys 27a and 27b arranged on the left and right sides of the reading area of the reading platen 5, and a winding wire 26 is bridged between the pulleys 27a and 27b. A unit moving motor Mu is connected to the pulley 27b.

  Accordingly, the carriage 21 reciprocates along the platen 5 between the home position Hp at the right end of FIG. 5 and the return position Rp at the left end along the platen 5 by forward and reverse rotation of the unit moving motor Mu. Therefore, the light source lamp 23 a disposed on the carriage 21 and the circuit board 30 are connected by a harness 40. The wiring structure of the harness 40 is as described above with reference to FIG.

[Finisher device]
Next, the structure of the finisher apparatus using the harness wiring structure described above will be described. A finisher apparatus B shown in FIG. 6 includes a processing tray 10 that stacks sheets in a bundle shape, and a staple unit (post-processing unit) 25 that is movably disposed along the front edge of the sheet bundle that is stacked on the processing tray. It consists of and.

  The processing tray 10 is arranged on the downstream side of the paper discharge path so that the sheet is carried out from the paper discharge path arranged on the upstream side. The processing tray 10 is provided with a sheet end regulating member (not shown), and alignment conveying means such as a switchback roller for conveying the sheet toward the regulating member is arranged. In addition, the processing tray 10 is provided with an alignment member for positioning and aligning the side edges of the stacked sheets. In this way, the processing tray 10 stacks and stacks the sheets sequentially transported from the upstream discharge path, positions the leading edge of the sheet on the regulating member disposed on the tray at the time of the stacking, At the same time, the side edges of the sheet are configured to be aligned and aligned.

  A staple unit (post-processing means) 25 is disposed at the leading edge of the processing tray 10. The staple unit 25 is equipped with a stapler. The stapler includes a head portion, an anvil portion, a cartridge portion, and a drive mechanism. A driver plate is built in the head portion so as to be movable up and down, and a former member is disposed below the driver plate. Then, linear staples are supplied from the cartridge part to the head part, and the linear staples are bent into a U shape when the driver plate descends, and then inserted into the sheet bundle on the tray by the driver plate.

  The anvil portion is disposed to face the head portion with a sheet bundle interposed therebetween, and is provided with a clinch groove for bending the tip of a staple needle inserted by a driver plate. The driver plate operates a drive cam by a staple motor mounted on the unit frame, and a drive lever is disposed between the drive cam and the driver plate. The drive lever is provided with an energy storage spring.

  Accordingly, the staple motor is activated to rotate the drive cam from the home position by a predetermined amount. The rotation of the drive cam stores energy in the drive lever and energy storage spring, and the cam is released after a predetermined rotation of the cam. Then, the drive lever descends vigorously, and the driver plate engaged therewith descends vigorously from the top dead center toward the bottom dead center. Then, the band-shaped (sheet-shaped) staples supplied from the cartridge part are bent in a U-shape and then inserted into the sheet bundle. Simultaneously with the insertion into the sheet bundle, the tip of the needle is bent into the anvil portion.

  Therefore, the staple unit 25 is slidably supported on a guide rail (rod) 12 provided on the apparatus frame 2. The staple unit 25 is connected to a winding wire 26 that is stretched between a pair of left and right pulleys 27a and 27b disposed in the apparatus frame adjacent to the processing tray 10. A unit movement motor Mu is connected to the one pulley 27b. The unit moving motor Mu is composed of a stepping motor, and controls the operation position of the unit at the same time as the staple unit 25 is moved relative to the sheet bundle on the processing tray.

The perspective view which shows the whole structure of the harness wiring structure concerning this invention. It is explanatory drawing which shows the concept of a harness wiring structure, (a) is a harness state figure when a driving | running | working unit is a home position, (b) is a harness state figure when a driving | running | working unit is a return position, (c) reaches a harness. It is an action figure of energizing force. The structure of a harness is shown, (a) is a single wire, (b) is a binding wire, (c) is a flat cable, and (d) is a printed wiring. FIGS. 3A and 3B are diagrams illustrating operation states in the harness wiring structure of FIG. 2, in which FIG. 2A illustrates a state where the traveling unit is at a home position, and FIG. FIG. 3 is an explanatory diagram of an image reading apparatus adopting the harness wiring structure of FIG. 2. Explanatory drawing of the finisher apparatus which employ | adopted the harness wiring structure of FIG.

Explanation of symbols

A Image reading device B Finisher device Mu Unit movement motor (drive motor)
L0 travel stroke (travel unit)
Lh Harness length Lhmax Harness limit elastic length LS Movement stroke (sliding member)
Lw Length of pulling member Fs Tensile tension 2 Device frame 2a Side plate 2c Bottom chassis 5 Reading platen 6 Casing 7 Guide pin 10 Processing tray 12 Guide rail 15 Working area 17 Lens unit 18 Photoelectric conversion element 20 Traveling unit 21 Carriage 22 Unit frame 23 Light source lamp storage section 23a Light source lamp 24 Reflection mirror storage section 24a Reflection mirror 25 Post-processing means 26 Winding wires 27a, 27b A pair of pulleys 30 Circuit board 32 Mounting board 33 Power supply circuit 40 Harness 40x Base end section 40y Tip section 41 Connector 42 Connector 45 cable length adjusting means 46 support member 47 urging means 48 pulling member 48x base end part 48y distal end part 50 slide member 50c bent part 50g long groove 51 pulley member

Claims (8)

A harness wiring structure for connecting a traveling unit that reciprocates at a predetermined stroke and a circuit board,
A device frame;
A traveling unit that reciprocates in a predetermined work area set in the device frame;
A circuit board fixed to the device frame and supplying power to the traveling unit and / or transmitting / receiving signals;
A harness for electrically connecting the circuit board and the traveling unit;
Cable length adjusting means for bending the harness as the traveling unit reciprocates;
With
The cable length adjusting means is
A support member that is arranged to be reciprocable between a predetermined distance and supports the harness;
A biasing member that biases the support member in one direction;
A traction member that is disposed between the support member and the apparatus frame and restricts a biasing force acting on the support member;
Consists of
The length of the harness and the length of the pulling member are
The harness wiring is characterized in that the tension tension acting on the support member from the biasing member acts on the traction member side and does not act on the harness side or acts to reduce the harness wiring. Construction. The pulling member and the harness are fixed to a circuit board fixed at a base end portion to the device frame, and a tip end portion is fixed to the traveling unit.
The harness wiring structure according to claim 1, wherein the length of the pulling member is set shorter than the length of the harness. The support member is
A slide member slidably attached to the device frame;
A pulley member attached to the slide member and indicating the harness cable;
Consists of
The biasing member is
The harness wiring structure according to claim 1, wherein the harness wiring structure is constituted by a tension spring suspended between the device frame and the slide member. The harness is
One end is supported by the circuit board and the other end is fixedly supported by the traveling unit, and an intermediate portion thereof is wound around the pulley and is supported in a substantially U shape.
The traction member is
One end is supported by the circuit board and the other end is fixedly supported by the traveling unit, and an intermediate portion thereof is wound around the pulley and is supported in a substantially U shape.
At this time, the length of the pulling member is set shorter than the length of the harness, and the harness is wound in a U shape with a gap formed on the outer periphery of the pulley. Harness wiring structure. A device frame;
A carriage that reciprocates in a predetermined image reading area set in the apparatus frame;
A light source disposed on the carriage for irradiating light on a document image in the image reading area;
Lens means for condensing the reflected light from the original image on a predetermined imaging surface;
Photoelectric conversion means for photoelectrically converting light from the lens means disposed on the imaging plane;
A circuit board for supplying power to the light source;
A harness for electrically connecting the circuit board and the carriage;
Cable length adjusting means for bending the harness as the carriage reciprocates;
With
The cable length adjusting means is
A support member arranged to be able to reciprocate between a predetermined distance and supporting the harness;
A biasing member that biases the support member in one direction;
A traction member that is disposed between the support member and the apparatus frame and restricts a biasing force acting on the support member;
Consists of
The length of the harness and the length of the pulling member are
The image reading is characterized in that the tension tension acting on the support member from the biasing member acts on the traction member side and does not act on the harness side or acts to reduce the image reading. apparatus. The circuit board is fixed to a chassis disposed in the device frame;
6. The image reading apparatus according to claim 5, wherein the photoelectric conversion means and a power supply circuit for supplying power to the light source are arranged on the circuit board. A processing tray for temporarily holding a single sheet or a bundle of sheets;
Post-processing means for performing post-processing such as binding processing, sealing processing, punching processing on the sheet on the processing tray;
A traveling unit that reciprocates the post-processing means along an edge of a sheet on the processing tray;
A circuit board for supplying driving power to the post-processing means;
A harness for electrically connecting the circuit board and the post-processing means;
Cable length adjusting means for bending the harness with reciprocation of the traveling unit;
With
The cable length adjusting means is
A support member arranged to be able to reciprocate between a predetermined distance and supporting the harness;
A biasing member that biases the support member in one direction;
A traction member that is disposed between the support member and the apparatus frame and restricts a biasing force acting on the support member;
Consists of
The finisher device is set to a length in which a tensile tension acting on the support member from the urging member acts on the traction member side and does not act on or reduces the harness side. . The finisher apparatus according to claim 7, wherein the post-processing unit is a stapler that staples a bundle of sheets stacked on the processing tray.

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