JP2003072039A - Recording apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dropped matter receiving part for receiving a matter dropped from the circuit substrate at a low cost in a recording apparatus comprising an apparatus main body provided by assembling a plurality of units with a circuit substrate disposed substantially vertically. SOLUTION: A carriage unit comprising a carriage 22 comprises a frame member 21 (main frame part 21a) as the base member. A circuit substrate 33 comprising a control part of a printer 100 is provided vertically on the rear side of the main frame part 21a as well as the lower end part of the main frame part 21 is disposed above the paper P conveyance path. A bent part 21d formed so as to avoid the paper P conveyance path is disposed below the circuit substrate 33 so as to provide the function of a dropped matter receiving part for receiving a matter dropped from the circuit substrate 33.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus for recording on a recording medium, the apparatus main body being divided into a plurality of units, and the apparatus main body being configured by combining the plurality of units.

[0002]

2. Description of the Related Art A recording apparatus typified by a fax machine, a printer or the like is provided with a main frame which is a base of the apparatus, and each component of the recording apparatus is assembled to the main frame, and the main frame is used for recording. There is one in which the entire device is integrally configured. However, in the case where the entire recording apparatus is integrally configured with the main frame as the core in this way, the assembly work of the apparatus cannot be divided into labor, the assembly cannot be performed efficiently, and the maintainability is deteriorated. Therefore, there is a case in which the recording device is divided into units, the assembly work is performed for each unit, and then the units are finally combined.

In the recording apparatus having such a structure, a carriage unit provided with an ink jet recording head for ejecting ink droplets onto a printing paper as a recording material so as to reciprocate in the main scanning direction, uses the printing paper as the ink jet recording medium. When connected to the upper portion of a transport unit that includes a transport unit that transports the print head below the recording head at a constant pitch, the lower portion of the frame member that serves as the base of the carriage unit may be a position that interrupts the transport path of the printing paper. In such a case, generally, the frame member is formed by cutting out a portion that interrupts the conveyance path.

[0004]

By the way, there is a case where a circuit board constituting a control unit of the recording apparatus is arranged substantially vertically on the back side of the frame member. In this case, if a defect such as a short circuit occurs on the circuit board, the burned material or the like (high-temperature object) may drop downward from the circuit board. Therefore, in the recording apparatus configured as described above, it is desirable to provide the falling object receiving portion below the circuit board, but it is costly to newly provide the falling object receiving portion. Become.

Therefore, the present invention has been made in view of the above situation, and its problem is that the apparatus body is divided into a plurality of units, and the apparatus body is configured by combining the plurality of units. Further, in a recording apparatus in which a circuit board is erected in a substantially vertical manner, a falling object receiving section for receiving a falling object from the circuit board is provided at low cost.

[0006]

In order to solve the above-mentioned problems, a recording apparatus according to claim 1 of the present application has an apparatus main body divided into a plurality of units, and the plurality of units are combined to form an apparatus main body. And a carriage unit provided with an ink jet recording head for ejecting ink droplets onto the recording material so as to reciprocate in the main scanning direction, and a recording material. A transport unit for transporting the carriage unit to the upper part of the inkjet recording head at a constant pitch, and a transport driven roller that is driven to rotate by being pressed against the transport drive roller. A side frame in which carriage units are provided upright on both sides of the carriage unit, and a lower end has a connecting portion with another unit. And a main frame portion on the back side of which a circuit board that constitutes the control portion of the recording apparatus is arranged substantially vertically, and a plane orthogonal to the side frame portion. The base body is composed of a frame member formed to have a substantially U-shape when viewed, and the lower end portion of the plate-shaped body corresponding to the main frame portion connects the carriage unit and the transport unit. In a state where the recording material is conveyed in a state of being blocked, and the lower end portion is bent substantially horizontally so as to avoid the conveying path, and the portion that is bent substantially horizontally is
It is also characterized in that it also serves as a falling object receiving portion for receiving a falling object from the circuit board.

According to the first aspect of the present invention, the frame member constituting the base of the carriage unit is used to receive an object falling from the circuit board, for example, a combustion object falling due to a defect such as a short circuit. The falling object receiving section can be provided at low cost. That is, the recording apparatus includes a carriage unit in which an inkjet recording head that ejects ink droplets onto a recording material is reciprocally movable in the main scanning direction, and a conveyance drive that conveys the recording material below the inkjet recording head at a constant pitch. A transport unit that includes a roller and a transport driven roller that is rotated by being pressed against the transport drive roller and that connects the carriage unit to an upper portion. In addition, the carriage unit includes a frame member that serves as a base of the unit, the frame member is arranged upright on both sides of the carriage unit, and a side frame portion that has a connecting portion with another unit at a lower end portion, A main frame portion is formed on a rear surface of the main body, and a circuit board constituting a control portion of the recording apparatus is arranged substantially vertically on the back surface side. It is formed to have a U-shape.

Here, the lower end of the portion corresponding to the main frame portion of the plate-like member is located at a position that interrupts the conveyance path of the recording material in the state where the carriage unit and the conveyance unit are connected. The transport route is not avoided by notching the lower end portion, but the transport route is avoided by being bent substantially horizontally. Further, since the substantially horizontally bent portion is configured so as to also serve as a falling object receiving portion for receiving a falling object from the circuit board, it is therefore not necessary to provide the falling object receiving portion exclusively for it. It is possible to provide the falling object receiving portion that receives the falling objects from the circuit board at low cost. At the same time, by bending the lower end portion of the main frame portion in this manner, it is possible to reduce the processing cost of the main frame as compared with the case where the portion is cut out.

According to a second aspect of the present invention, there is provided a recording apparatus according to the first aspect.
In the above, the plate-shaped body is made of a metal flat plate. According to the second aspect of the present invention, since the main frame portion, that is, the plate-like member forming the falling object receiving portion is made of a metal flat plate, the falling object from the circuit board is a high temperature object such as a combustion object. It is possible to respond surely.

According to a third aspect of the present invention, there is provided a recording apparatus according to the first aspect.
2 or 3, the transport driven roller holder that pivotally supports the transport driven roller is made of a resin material, and the falling object receiving portion is disposed above the transport driven roller holder.

According to the third aspect of the present invention, the transport driven roller holder that pivotally supports the transport driven roller is made of a resin material, and the falling object receiving portion is disposed above the transport driven roller holder. Therefore, it becomes possible to protect the transport driven roller holder, which is easily deformed by high temperature, from a high-temperature fallen object from the circuit board.

The recording device according to claim 4 of the present application is the recording device according to claim 4.
In the above, a paper guide member formed of a resin material for guiding the recording material to the downstream side is provided below the transport driven roller holder.

According to the fourth aspect of the present invention, since the paper guide member for guiding the recording material to the downstream side, which is made of the resin material, is provided below the transport driven roller holder, the high temperature is therefore achieved. Thus, it becomes possible to protect the easily deformable paper guide member from a high-temperature fallen object from the circuit board.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. <Structure of Apparatus Main Body of Inkjet Printer> The structure of the apparatus main body of the inkjet printer according to the embodiment of the present invention will be described below with reference to FIGS. 1 to 4. Here, FIG. 1 is an external perspective view of an apparatus main body of the inkjet printer (hereinafter abbreviated as “printer”) 100, FIG. 2 is the same exploded perspective view, FIG. 3 is the same side sectional view, and FIG. It is a figure.

In FIG. 1 and FIG. 2, the printer 100 is divided into a plurality of units, and the plurality of units are combined to form a main unit. In the figure, reference numeral 1 is a paper feeding unit as a paper feeding device capable of feeding a paper P (see FIG. 3) as a recording material or roll paper (not shown), and reference numeral 20 is an inkjet recording head 24 (see FIG. 3)), a carriage unit including a carriage 22 having a carriage 22 having a reference numeral 60, a conveyance unit 60 for conveying a recording material, and a reference numeral 80 an ink system unit for performing maintenance of the inkjet recording head 24. Is divided into these four units as shown in FIG.
It is constructed by combining two units as shown in FIG.

In this embodiment, the carriage unit 20 is connected to the upper portion of the transport unit 60, the ink system unit 80 is connected to the right side of the transport unit 60 and the lower right side of the carriage unit 20, and the paper feeding unit 1 is connected. The carriage unit 20 is configured so that the four units are united by being connected to each other on the back surface of the carriage unit 20, and a unit connecting device, which will be described in detail later, is used to connect the sheet feeding unit 1 and the carriage unit 20. There is.

Next, referring to FIG. 3, the printer 100 will be described.
The paper transporting route will be described. In addition, in the following, FIG.
The left side (rear side of the printer 100) is referred to as “upstream side”, and the right side of FIG. 3 (front side of the printer 100) is referred to as downstream side. The printer 100 is provided with a hopper 6 on the upstream side, and the sheets P as cut sheets are accumulated and stored on the hopper 6 in an inclined posture. The hopper 6 is rotatably provided in a clockwise direction and a counterclockwise direction in FIG. It is designed to be pressed and separated.

Further, the hopper 6 is provided with a movable guide 4 slidable in the width direction of the paper P (see FIG. 1) and guides the side edge of the accumulated paper P together with the fixed guide 5 (see FIG. 1). Then, the topmost one of the accumulated sheets P is
The hopper 6 performs a pressure contact operation with respect to the paper feed roller 3, and the paper feed roller 3 is rotated in the pressure contact state, whereby the paper is fed to the downstream side. The paper feed roller 3 has a substantially D-shape when viewed from the side, and the flat portion of the paper feed roller 3 is formed during printing operation.
The state is controlled so as to be opposed to (the state of FIG. 3), and thereby the generation of the conveyance load of the paper P is prevented.

Next, a paper guide 67 as a plate-like member is provided substantially horizontally below the paper feed roller 3, and the front end of the paper P fed out by the paper feed roller 3 is provided in the paper guide 67.
It obliquely abuts and is smoothly guided to the downstream side. The transport drive roller 62 that is rotationally driven downstream from the paper guide 67.
And the transport driven roller 6 that is in pressure contact with the transport drive roller 62.
3 is provided, the sheet P is nipped between the conveyance driving roller 62 and the conveyance driven roller 63, and is conveyed to the downstream side at a constant pitch.

The transport driven roller 63 is axially supported on the downstream side of the transport driven roller holder 64, and the transport driven roller holder 64 is rotated about the rotation shaft 64a in the clockwise direction and the counterclockwise direction in FIG. The transport driven roller 63 is rotatably biased in a direction in which the transport driven roller 63 is constantly in pressure contact with the transport drive roller 62 (clockwise direction in FIG. 3) by a torsion coil spring (not shown).

Next, in the vicinity of the conveyance driven roller holder 64 located on the most one-digit side (on the right front side in FIG. 2), the sheet detection consisting of the sensor body 36b and the detector 36a for detecting the passage of the sheet P is detected. A container 36 is provided. Detector 36a
Is formed in a substantially V shape in a side view, and is rotatably provided in a clockwise direction and a counterclockwise direction in FIG. 2 around a rotation shaft 36c near the center thereof. The sensor body 36b, which is located above the detector 36a, is attached to the lower portion of a circuit board 33 (described later) provided substantially vertically in the center of the printer 100, and includes a light emitting portion (not shown) and the light emitting portion. The detector 3 is provided with a light receiving portion (not shown) that receives light from the detector 3.
The upper side of the rotation shaft 36c of 6a is rotated by
The light traveling from the light emitting unit to the light receiving unit is blocked and passed.

Therefore, as shown in FIG. 3, when the detector 36a is rotated so as to be pushed upward with the passage of the sheet P, the upper side of the detector 36a is disengaged from the sensor body 36b, whereby the light receiving portion is formed. Is in a light receiving state, and the passage of the paper P is detected.

Then, downstream of the transport drive roller 62,
The platen 66 and the inkjet recording head 24 are arranged so as to face each other vertically. The platen 66 is long in the main scanning direction (see FIG. 2), and the paper P conveyed below the inkjet recording head 24 by the rotation of the conveyance driving roller 62 is supported from below by the platen 66. The ink jet recording head 24 is an ink cartridge 23.
A carriage guide shaft 2 extending in the main scanning direction is provided at the bottom of a carriage 22 for mounting the carriage.
It reciprocates in the main scanning direction while being guided by 5.

In this embodiment, the ink cartridge 23 has four cartridges, that is, four cartridges, as shown in FIG.
Color inks (black, yellow, cyan, magenta)
Consists of four cartridges that are filled independently of each other, and each cartridge can be replaced independently.

Next, a sheet discharge section of the printer 100 is provided downstream from the ink jet recording head 24, and a sheet discharge drive roller 65, a sheet discharge driven roller 31, and a sheet discharge auxiliary roller 32 are arranged. . A plurality of paper ejection drive rollers 65 are attached in the axial direction of the paper ejection drive roller shaft 65a that is rotationally driven (see FIG. 4), and the paper ejection driven roller holder 3
The paper discharge driven roller 31 pivotally supported by 1a is provided so as to be driven to rotate by being lightly pressed against the paper discharge drive roller 65. Therefore, the paper P printed by the inkjet recording head 24 is rotated in a state where it is nipped by the paper ejection drive roller 65 and the paper ejection driven roller 31, so that the paper ejection direction (FIG. Three
Is discharged in the direction of arrow).

It should be noted that the discharge assisting roller 32, which is axially supported by the discharge assisting roller holder 32a, is provided on the slightly upstream side of the discharge assisting roller 31, and presses the paper P slightly downward so that the platen of the paper P is pushed. Prevents floating from 66,
Therefore, the distance between the paper P and the inkjet recording head 24 is regulated.

The hopper 6, the movable guide 4, the fixed guide 5, and the paper feed roller 3 described above are provided in the above-mentioned paper feed unit 1 shown in FIGS. 1 and 2. As shown in FIG. 2, the sheet feeding unit 1 includes a mounting portion right 2a and a mounting portion left 2 which are vertically arranged on both sides of a hopper 6 and have a substantially columnar shape.
The base of the paper feeding unit frame 2 is provided with a rotary shaft 3a of the hopper 6 and the paper feeding roller 3.
Etc. are provided in the paper feeding unit frame 2.
Then, the sheet feeding unit 1 is connected to the rear side of the carriage unit 20 at the upper portions of the mounting portions 2a and 2b, as will be described later.

Next, the paper guide 67 and the conveyance drive roller 6
2, transport driven roller holder 64, paper ejection drive roller shaft 65
a is provided in the transport unit 60 shown in FIGS. 1 and 2. As shown in FIG. 2, the transport unit 60 includes a transport unit frame 61 having a substantially U-shaped plan view as a base body, a power supply unit 68 that is a power supply unit of the printer 100 at the rear, and a paper discharge at the front. The drive roller shaft 65a is attached to the transport drive roller 62 in the middle of the main body.
Further, a platen 66 is provided in the upper front part, and a transport driven roller holder 64 is provided in the middle upper part.

Further, the transport unit 60 has, on the lower left side, a paper feed roller 3, a transport drive roller 62, and a paper discharge drive roller 6.
5, a pump device 82, a blade unit 84, which will be described later,
A drive motor 69 (see FIG. 4) that serves as a common drive source for these is provided. Drive motor 69 and the drive motor 6
The five driven objects driven by 9 are the four
When the two units are combined as shown in Fig. 1,
It is connected by a power transmission mechanism whose illustration and description are omitted, and can be selectively driven.

Connected to the right side of the transport unit 60,
The ink system unit 80 as a maintenance means of the inkjet recording head 24 includes a frame 81, which is connected to the right side surface of the transport unit frame 61 and serves as a base of the unit, as shown in FIG.
Further, a cap device 83, a pump device 82, and a blade unit 84 are provided. The cap device 83 protects the nozzle surface (not shown) by capping the inkjet recording head 24 when the carriage 22 moves to the home position (right side region in FIG. 4), and the pump device 82 is the cap device in the capped state. A negative pressure is supplied to 83 to suck ink from the nozzle openings of the inkjet recording head 24.

Further, the blade unit 84 is movable between a position that crosses the reciprocating region of the carriage 22 and a position that retracts from the reciprocating region, moves to a position that traverses the reciprocating region of the carriage 22, and then the carriage. 22
Is moved from the print area to the home position (right side area in FIG. 4) or in the opposite direction to wipe the nozzle surface (not shown) of the inkjet recording head 24 for cleaning. .

The carriage guide shaft 25 and the paper detector 36 are provided in the carriage unit 20. As shown in FIG. 2, the carriage unit 20 includes a side frame portion right 21b and a side frame portion left 21c which are erected on both sides, and the side frame portion right 21b.
And a main frame portion 21a forming a plane orthogonal to the left side frame portion 21c, the frame body 21 having a substantially U-shape in plan view constitutes a base body of the unit, and a carriage guide is provided behind the frame member 21. The shaft 25 is supported.

Further, as shown in FIG. 4, the carriage unit 20 is provided with a carriage motor 27 on the rear surface on the left side of the unit, and a drive pulley 28 is attached to the carriage motor 27. A driven pulley 29 is provided on the right side of the unit, a carriage belt 26 is hung between the drive pulley 28 and the driven pulley 29, and a part of the carriage belt 26 is fixed to the carriage 22. . Therefore, the carriage 22 reciprocates in the main scanning direction (left and right direction in FIG. 4) by the rotation of the carriage motor 27.

Although the paper discharge frame 30 is attached to the carriage unit 20 side in FIG. 2, the paper discharge frame 30 can be attached to the carriage unit 20 side or the transport unit 60 side. It is possible to belong to either side.

The above is the configuration of the apparatus main body of the printer 100, and the printer 100 becomes movable by combining and connecting the four units. The carriage unit 20 and the sheet feeding unit 1 are connected by one unit connecting device and one connecting portion described later, and the other units are connected by fixing screws not shown.

<Structure of Unit Connecting Device and Method of Inserting / Removing Circuit Board> Next, the structure of the unit connecting device 50 for connecting the sheet feeding unit 1 and the carriage unit 20 and the method of inserting / removing the circuit board 33 will be described with reference to FIGS. This will be described with reference to FIG. Here, FIG. 5 is an external perspective view of the main body of the printer 100 as seen from the rear, FIG. 6 is an external perspective view showing the state in which the paper feeding unit 1 is separated from the state of FIG. 5, and FIG. 7 is a plan view of the circuit board. 8 is an external perspective view of the printer 100. 9 is an external perspective view of the unit connecting device 50, FIG. 10 is a plan view of the connecting member 37, FIG. 11 is a state transition diagram showing a connecting method by the unit connecting device 50, and FIG.
Is a state transition diagram showing a coupling method by a unit coupling device according to another embodiment, and FIG. 13 is a perspective view of a coupling portion between the sheet feeding unit 1 and the carriage unit 20.

In FIGS. 5 and 6, the paper feeding unit 1 is connected to the rear side of the carriage unit 20 so as to sandwich the circuit board 33 constituting the control section of the printer 100.
The circuit board 33 is a printer 100 as shown in FIGS.
As shown in detail in FIG. 7, the power-on switch 34 and the control switches 35, 35 of the printer 100 are provided on the upper part, and the detecting portion 36b (see FIG. 3) of the paper detector 36 is provided on the lower part as shown in detail in FIG. I have it.

Power-on switch 34 and control switch 3
As shown in FIG. 8, the buttons 5 and 35 can be pressed by a panel button 91 provided on the upper surface of a cover member 90 that forms the exterior of the printer 100. Here, in the printer having the panel button 91 arranged on the front surface of the cover member 90, in addition to the circuit board 33 constituting the control unit, the power-on switch 34 and the control switch 35,
It is necessary to separately dispose a printed circuit board on which the circuit board 35 is disposed on the front back side of the cover member 90, but in the present embodiment, the panel button 91 is disposed on the upper surface of the cover member 90 and the circuit board 33 is mounted on the device. By erected vertically in the vicinity of the center, the power-on switch 34 and the control switches 35, 35 can be arranged on the upper part of the circuit board 33, so that the printed circuit board is unnecessary.

Further, in a printer having a structure in which the circuit board 33 is horizontally arranged at the bottom of the apparatus, for example, a printed board for arranging the detecting portion 36b of the paper detector 36 is separately conveyed and driven roller holder. 64 (see FIG. 3), it is necessary to arrange it above the circuit board 33.
By erected vertically in the vicinity of the center of the apparatus, it is possible to dispose the detection portion 36b of the paper detector 36 below the circuit board 33, thus eliminating the need for the printed circuit board.

The circuit board 33 is attached to the carriage unit 2
By arranging it on the back side of the main frame portion 21a of 0, the distance between the circuit board 33 and the carriage 22 is reduced, and thereby the flat cable 48 for connecting the circuit board 33 and the carriage 22 (see FIG. 5). It is possible to shorten the cable length.

Next, the paper feeding unit 1 is connected to the main frame portion 21a of the carriage unit 20 at the upper portions of the mounting portions 2a and 2b. More specifically, the upper portion of the mounting portion 2a is connected by the unit coupling device 50 described in detail later, and the upper portion of the mounting portion 2b has an L-shape provided on the main frame portion 21a as shown in detail in FIG. An inverted U-shaped hook portion 8 provided on the mounting portion 2b is hooked to the hook receiving portion 46 so as to be connected.

As shown in FIG. 9A, the unit connecting device 50 has a tongue piece 41 as a "first engaging portion", a connecting member 37, and a snap forming a "second engaging portion". It is composed of a plate 44 and a support surface 43. The tongue piece 41 has a substantially T-shape when viewed from the front and is provided along a plane orthogonal to the connecting direction of the sheet feeding unit 1 and the carriage unit 20 (the left-right direction in FIG. 11). ,
The upper surface of the mounting portion 2a has a smooth horizontal surface, and the snap plate 44 is made of an elastically deformable resin material as "elastic means".

The connecting member 37 is made of a plate-like member, and as shown in FIG. 10, a fitting hole 39 as a "recess" and a groove 38 are formed. The fitting hole 39 is fitted with a fitting projection 45 (see FIG. 11) as a “projection” formed so as to project toward the support surface 43 of the snap plate 44. And supporting surface 4
The engagement state with 3 (the second engagement portion) is formed. Further, the groove 38 is for the connecting member 37 to be hooked on the tongue piece 41, and the connecting member 37 being hooked on the tongue piece 41 by the groove 38 allows the tongue piece 41 (first engaging member). The mating portion) and the connecting member 37 are engaged with each other.

The unit connecting device 5 configured as described above
0 can connect the sheet feeding unit 1 and the carriage unit 20 by two methods described below. That is, first, as shown in FIG. 9A, the connecting member 37 is previously inserted between the snap plate 44 and the support surface 43,
The fitting hole 39 is fitted into the fitting protrusion 45, and the connecting member 37
Is attached to the attachment portion 2a of the sheet feeding unit 1. Then, the paper feeding unit 1 is lifted up, and the connecting member 3
7 is hooked to the tongue piece 41 by the slot 38, and as shown in FIG.
As shown in (b), the paper feeding unit 1 and the carriage unit 20 can be connected. Where the tongue 41
10 extends in the width direction of the tongue piece 41 and is denoted by reference numeral 3 in FIG.
After being inserted so as to project upward from the connecting member 37 by the groove hole portion 8b, it extends in parallel with the groove hole portion 38b.
The connecting member 37 moves to the slot portion as the “second slot” indicated by the reference numeral 38 a, and the connecting member 37 is hooked on the tongue piece 41.

Next, the attachment portion 2b and the main frame portion 21a are only connected by the connecting portion shown in FIG. 13, that is, the paper feeding unit 1 and the carriage unit 20 are united, but the connection is completed. In the state not doing,
As shown in FIGS. 11A to 11C, by horizontally rotating the mounting member 37, the connected state, that is, the unit connecting device 50 can be brought into the locked state. More specifically, as shown in FIG. 10, the tongue piece 41 is detached from the connecting member 37 by the groove hole portion as the “first groove hole” indicated by reference numeral 38c, which is formed so as to obliquely intersect the groove hole portion 38b. 11 (a state of FIG. 11A), the connecting member 37 is rotated substantially horizontally to guide the tongue piece 41 from the groove hole portion 38c to the groove hole portion 38a, and the engagement between the tongue piece 41 and the connecting member 37. The mating operation is completed (FIGS. 11B and 11C), and the fitting projection 45 is fitted into the fitting hole 39 by inserting the connecting member 37 between the support surface 43 and the snap plate 44. Thus, the engaging operation of the connecting member 37 with the support surface 43 and the snap plate 44 is completed.

The groove area 38d in FIG. 10 is a guide groove area for guiding the tongue piece 41 from the groove portions 38c to 38a. In order to make the sheet feeding unit 1 and the carriage unit 20 separable, the connecting member 37 is rotated in the reverse order to the above, that is, in the order shown in FIGS. This can be done by removing the connecting member 37.

As described above, in the unit connecting device 50, the connecting member 37 and the tongue piece 41 are engaged by the hooking means, and the engaging projections 45 are fitted in the fitting holes 39 by the snap means. Then, since the paper feeding unit 1 and the carriage unit 20 are connected to each other, a tool such as a driver is not required for connecting or disconnecting the paper feeding unit 1 and the carriage unit 20, so that the paper feeding unit 1 can be easily connected. It is possible to perform connection or disconnection work with the carriage unit 20.

The unit connecting device 50 may be embodied as shown in FIG. In the embodiment of the unit connecting device 50 shown in FIG. 12, the tongue piece 41 provided on the main frame portion 21a in FIG. 9 is provided on the connecting member 37 side, and the groove provided on the connecting member 37 side. The hole portion 38a is provided on the main frame portion 21a side. That is, the connecting member 37 ′ shown in FIG. 12 includes a tongue piece 41 ′ provided along a plane orthogonal to the connecting direction of the carriage unit 20 and the paper feeding unit 1 (the left-right direction in FIG. 12), and the main frame portion 21a. Similarly, a slot 38a ′ extending in a direction orthogonal to the connecting direction of the carriage unit 20 and the sheet feeding unit 1 is formed.

Therefore, when the carriage unit 20 and the paper feeding unit 1 are connected, FIGS.
As shown in FIG. 12, the tongue piece 41 ′ is hooked on the slot 38 a ′, and the connecting member 37 ′ is orthogonal to the connecting direction between the carriage unit 20 and the sheet feeding unit 1 (indicated by the arrow in FIG. 12A). Direction) to slide the connecting member 3
7'and the engagement between the slot 38a are completed,
By inserting the connecting member 37 ′ between the supporting surface 43 and the snap plate 44 by the sliding operation, the fitting protrusion 45 is fitted into the fitting hole 39, and thus the connecting member 37 ′, the supporting surface 43 and the snap. The engagement operation with the plate 44 is completed.

As described above, the same function and effect as those of the embodiment described above with reference to FIG. 11, that is, the sheet feeding unit 1 and the carriage unit 20 can be easily connected or disconnected without using a tool such as a driver. It is possible to obtain the action and effect.

Next, a method of inserting and removing the circuit board 33 will be described. First, as shown in FIG. 7, the circuit board 33 has a board receiving portion 49 provided on the back side of the carriage unit 20.
It is positioned in the vertical direction by and is fixed by screws in the substrate receiving portion 49 and the screw fixing portion 47. Note that the fixing of the board receiving portion 49 with the screws is performed from the front side of the printer 100 (the back side of the paper surface of FIG. 7).
Even when connected to 0, the screw fixing work can be performed. Further, the screw fixing in the screw fixing portion 47 is performed from the back side of the printer 100 (the front side of the paper surface of FIG. 7), and this is also in the state where the paper feeding unit 1 is connected to the carriage unit 20. It can be fixed with screws.

Here, the circuit board 33 has a positional relationship between the circuit components arranged on the circuit board 33 and the carriage unit 20 in a state where the paper feeding unit 1 is connected to the carriage unit 20 as shown in FIG. Although it cannot be pulled out laterally (to the left in FIG. 7) and can only be pulled out upward, the connecting member 37 (see FIG. 5) of the unit connecting device 50 is arranged above. Therefore, even when the fixing screws are removed from the board receiving portion 49 and the screw fixing portion 47 shown in FIG. 7, the circuit board 33 cannot be removed in this state.

However, the unit connecting device 50 connects the carriage unit 20 and the paper feeding unit 1 while the carriage unit 20 and the paper feeding unit 1 are connected by the connecting portion shown in FIG. 13 as described above. It is possible to switch between the locked state and the unlocked state. That is, the connecting member 37 is in the locked state when attached, and the connecting member 37 is in the unlocked state when removed, so that in the unlocked state where the connecting member 37 is removed, the circuit board 33 is inserted and removed. Open the route,
It is possible to pull out the circuit board 33 upward as indicated by reference numeral 33 'and phantom lines in FIG. Therefore, when the circuit board 33 is replaced, it is not necessary to separate the carriage unit 20 from the paper feeding unit 1, and the circuit board 33 can be replaced easily and quickly.

In the present embodiment, as described above, the unit connecting device capable of connecting and disconnecting the carriage unit 20 and the paper feeding unit 1 without using any tool by the hooking means and the snap means. Since 50 is used, the replacement work of the circuit board 33 is further facilitated.

<Structure and Effect of Dropped Object Receiving Section of Circuit Board> Next, the structure of the falling object receiving section of the circuit board 33 will be described with reference to FIG. 14 and other drawings as appropriate. The frame member 21 that forms the base of the carriage unit 20 and has a substantially U-shape in plan view has the side frame portion right 21b and the side frame portion 21c that are erected on both sides of the carriage unit 20 as described above (see FIG. 2)) and a main frame portion 21a forming a plane orthogonal to these, but in the printer 100 according to the present invention, the frame member 21 is integrally formed by bending a metal flat plate. .

Next, as shown in FIG. 1, the right side frame portion 21b is connected to the paper discharge frame 30 at the lower front portion by a fixing screw 57, and is also connected to the ink system unit 80 at fixing screws 58, 58. . The side frame part left 21c is the side frame part right 2
Similar to 1b, it is connected to the discharge frame 30 at the lower front by fixing screws (not shown). That is, the lower ends of the right side frame portion 21b and the left side frame portion 21c are connecting portions with other units (the transport unit 60 and the ink system unit 80 in this embodiment).

On the other hand, in the main frame portion 21a, in the state where the carriage unit 20 and the transport unit 60 are connected, reference numeral 2 in FIGS.
As shown by 1c, the lower portion thereof is located above the conveyance path of the paper P and is bent downstream so as to have a substantially U-shape in a side view. That is, the frame member 21 is formed by bending a metal flat plate as described above, and the lower portions of the side frame portion right 21b and the side frame portion left 21c are used as connecting portions with other units. In the main frame portion 21a as it is (the flat plate state), the lower end of the main frame portion 21a blocks the conveyance path of the sheet P. Therefore, by forming the bent portion 21d as described above, the conveyance path of the sheet P is formed. Is configured to avoid.

By the way, as described above, the printer 100 is provided on the back side of the main frame portion 21a (left side in FIG. 3).
The circuit board 33 constituting the control section is arranged substantially vertically, and the bent portion 21d is located below the circuit board 33. Here, if a defect such as a short circuit occurs in the circuit board 33, there is a possibility that combustion products or the like (high-temperature objects) may fall downward from the circuit board 33. However, since the bent portion 21d is arranged below the circuit board 33, the fallen object can be received by the bent portion 21d.

That is, since the bent portion 21d formed to avoid the conveyance path of the paper P is also configured as a "falling object receiving portion" for receiving a falling object from the circuit board 33, the circuit board is formed. Since the 33 is arranged substantially vertically, the falling object receiving portion to be provided can be arranged at low cost. At the same time, by bending the lower end portion of the main frame portion 21a in this manner, it is possible to reduce the processing cost of the main frame 21a as compared with the case where the portion is cut out.

In this embodiment, the frame member 2
1, that is, the bent portion 21d as the fallen object receiving portion is formed of the metal flat plate, and therefore, it is possible to reliably cope with the fall of the burned matter as described above.

[0061]

As described above, according to the present invention, by using the frame member which constitutes the base of the carriage unit, a falling object from the circuit board, for example, a burning object that falls due to a defect such as a short circuit or the like. It is possible to provide the falling object receiving portion for receiving the.

[Brief description of drawings]

FIG. 1 is an external perspective view of an apparatus main body of an inkjet printer according to the present invention.

FIG. 2 is an exploded perspective view of the apparatus body of the inkjet printer according to the present invention.

FIG. 3 is a side sectional view of the inkjet printer according to the present invention.

FIG. 4 is a front view of the apparatus main body of the inkjet printer according to the present invention.

FIG. 5 is an external perspective view of the apparatus body of the inkjet printer according to the present invention as viewed from the rear.

FIG. 6 is an external perspective view of the apparatus main body and the sheet feeding unit as seen from the rear side in a state where the sheet feeding unit is separated from the apparatus main body of the inkjet printer according to the present invention.

FIG. 7 is a plan view of a circuit board of the inkjet printer according to the present invention.

FIG. 8 is an external perspective view of an inkjet printer according to the present invention.

FIG. 9 is an external perspective view of a unit connecting device.

FIG. 10 is a plan view of a connecting member that constitutes the unit connecting device.

FIG. 11 is a state transition diagram (plan view) showing a connecting method by the unit connecting device.

FIG. 12 is a state transition diagram showing a connecting method of a unit connecting device according to another embodiment.

FIG. 13 is a perspective view of a connecting portion between a paper feeding unit and a carriage unit.

FIG. 14 is a perspective view (partially enlarged view) of a carriage unit of the inkjet printer according to the present invention.

[Explanation of symbols]

1 Paper feeding unit 2 Paper feeding unit frame 2a Mounting part right 2b Mounting part left 8 Hook part 20 Carriage unit 21a Main frame part 21b Right side frame 21c Left side frame 21d Bending part (falling object receiving part) 22 carriage 23 ink cartridges 24 inkjet recording head 25 Carriage guide shaft 33 circuit board 34 Power switch 35 Control switch 36 paper detector 37 Connection member 38a-38d Slotted hole 39 Fitting hole 41 tongue 43 support surface 44 snap plate 45 Fitting protrusion 46 Hook receiver 49 Substrate receiving part 50 unit mounting device 60 transport units 61 Transport unit frame 80 ink system unit 81 frames 100 inkjet printer

Claims (4)

[Claims] 1. The apparatus main body is divided into a plurality of units,
In addition, a recording apparatus for recording on a recording material, in which an apparatus main body is configured by combining the plurality of units, wherein an inkjet recording head for ejecting ink droplets on the recording material reciprocates in the main scanning direction. The carriage unit, which is provided with a carriage unit capable of being provided, a conveyance driving roller that conveys the recording material under the inkjet recording head at a constant pitch, and a conveyance driven roller that is driven to rotate by being pressed against the conveyance driving roller. And a carriage unit that connects the upper part to the upper part of the carriage unit, the carriage unit is provided upright on both sides of the carriage unit, and a side frame part having a connecting part to the other unit at the lower end, and the side frame part. A circuit board that constitutes a control unit of the recording apparatus is arranged substantially vertically on the back side of the main surface. The base body is composed of a frame member, which is formed by bending a plate-shaped body including a frame portion and has a substantially U-shape in a plan view, and a portion of the plate-shaped body corresponding to the main frame portion. The lower end of the recording medium is located at a position that interrupts the conveyance path of the recording material in the state where the carriage unit and the conveyance unit are connected, and the lower end is bent substantially horizontally to avoid the conveyance path. The recording apparatus according to claim 1, wherein the substantially horizontally bent portion also functions as a falling object receiving portion that receives a falling object from the circuit board. 2. The recording apparatus according to claim 1, wherein the plate-shaped body is a flat metal plate. 3. The transport driven roller holder for axially supporting the transport driven roller according to claim 1, wherein the transport driven roller holder is formed of a resin material, and the falling object receiving portion is disposed above the transport driven roller holder. A recording device characterized by the above. 4. The recording apparatus according to claim 4, further comprising a paper guide member, which is made of a resin material and which guides the recording material to the downstream side, provided below the transport driven roller holder. .