JP4428516B2 - Recording device - Google Patents

Description

  The present invention relates to a recording apparatus such as an ink jet printer, and more specifically, freely adjusts the rigidity of a flexible cable that electrically connects a recording apparatus main body control unit and a recording unit mounted on a carriage, and the recording unit reciprocates. The present invention relates to a recording apparatus that effectively suppresses vibration and floating of a flexible cable when moving.

  In a recording apparatus using an inkjet recording method or the like, a flexible cable is generally used as a means for transmitting print information from a control unit of the apparatus to a recording unit such as an inkjet head mounted on a carriage that reciprocates in the main scanning direction. ing. Usually, the flexible cable is fixed to the apparatus main body side by a cable pressing member attached near the middle of the carriage movement range, and is arranged so as to form a loop between the cable pressing member and the recording unit. As the recording apparatus becomes more sophisticated and smaller in size, the configuration of the apparatus is increased in density, and the flexible cable is sometimes complicated. In such a case, there is a risk of causing fatigue breakage due to the curvature of the minimum bending radius portion of the flexible cable exceeding the allowable minimum bending radius, or entanglement due to floating near the cable pressing member.

  As a countermeasure against such a problem, in the “electric carriage connecting means and the recording apparatus including the connecting means” disclosed in Patent Document 1, a cable cover that bends together with the flexible cable is arranged along the surface. In the “recording device” disclosed in Patent Document 2, a protective tape having excellent wear resistance is attached to the surface of the flexible cable, and a reinforcing tape having excellent rigidity is attached to the back surface. In addition, in the “recording apparatus” disclosed in Patent Document 3, a measure such as applying an appropriate tension to the flexible cable is performed by integrating a high-rigidity auxiliary material for retaining the flexible cable into the flexible cable. I came.

However, if the flexible cable is difficult to squeeze, a cable cover with a single configuration will not be able to follow the movement of the flexible cable to prevent vibrations and floats, and to prevent vibrations and lifts. If the thickness of the cable cover is increased, the curvature of the minimum bending radius of the flexible cable can be secured, but the cable cover bending durability cannot be satisfied due to the thickness, and conversely the cable cover bending durability is satisfied. However, when the thickness of the cable cover is reduced, there is a problem that the floating cannot be prevented.
JP 11-138945 A JP 2003-266864 A JP 2000-272196 A

The present invention has been made in view of the situation as described above, inventions of interest, followability to the cable cover of the flexible cable is high, cable cover capable of suppressing vibration and lifting of the flexible cable effectively Is to provide.

Also , give the appropriate tension to secure the curvature of the flexible cable, improve the bending durability, and use a sheet material thicker than other sheet materials to prevent the flexible cable from floating and getting caught It is.

In addition , the rigidity of the cable cover can be set more finely by combining different sheet materials, and the cost of the cable cover as a whole can be set only by using high-cost materials with excellent bending durability, etc. It is to suppress.

Further , the cable cover is made of a conductive material, a material having a conductive layer, or a magnetic material, thereby giving the cable cover a shielding effect against radiation noise.

According to a first aspect of the present invention, there is provided recording means for reciprocating in the main scanning direction to form an image on a recording medium, conveying means for conveying the recording medium in a sub-scanning direction orthogonal to the main scanning direction, and recording apparatus main body control A flexible cable for transmitting printing information from the recording section to the recording means, and a cable cover disposed along the flexible cable and bent together with the flexible cable. The cable cover is formed by at least two sheet members fixed by the fixing means. Among the sheet materials constituting the cable cover, the flexibility of the sheet material at the minimum bending radius is that the sheet material near the cable pressing member that fixes the flexible cable to the recording apparatus main body. It is characterized by higher than the flexibility .

The invention according to claim 2, in the recording apparatus according to claim 1, of the sheet material constituting the cable cover, the thickness of the sheet material of the minimum bending radius portion, the sheet in the vicinity of the cable pressing member It is characterized by being thinner than the thickness of the material .

According to a third aspect of the present invention, in the recording apparatus according to the first or second aspect, the width in the short direction of the sheet material of the minimum bending radius portion is in the short direction of the sheet material in the vicinity of the cable pressing member. It is narrower than the width .

According to a fourth aspect of the present invention, in the recording apparatus according to any one of the first to third aspects, the width of the sheet material constituting the cable cover in the short direction is a short of the sheet material of the minimum bending radius portion. It is characterized by continuously changing so that the width in the hand direction is the narrowest .

According to a fifth aspect of the present invention, in the recording apparatus according to any one of the first to fourth aspects, the sheet material of the minimum bending radius portion is made of a material different from the sheet material in the vicinity of the cable pressing member. It is characterized by that.

The invention according to claim 6 is the recording apparatus according to any one of claims 1 to 5 , wherein the sheet material constituting the cable cover is made of a conductive material or a material having a conductive layer. And

According to claim 1 invention has high followability to the flexible cable Ke Burukaba, it is possible to suppress the vibration and lifting of the flexible cable effectively.

The invention according to claim 2 is the recording apparatus according to claim 1, in the minimum bend radius of the full lexical Bull cable of the flexible cable giving moderate tension a thin sheet of plate thickness than the other of the sheet material It is possible to secure the curvature and improve the bending durability, and to prevent the flexible cable from floating and getting caught by using a sheet material thicker than other sheet materials at a place where suppression is required.

The invention according to claim 3 is the recording apparatus according to claim 1 or 2, wherein the rigidity at the minimum bending radius portion is lower than that of other sheet materials, the curvature of the flexible cable is secured, and the bending durability is improved. Since the sheet material at the place where the suppression is required is wide, the rigidity is increased, and the floating and entrainment of the flexible cable can be prevented.

According to a fourth aspect of the present invention, in the recording apparatus according to any one of the first to third aspects, the width of the sheet material on the carriage side, that is, the minimum bending radius portion is made narrower than the sheet material on the apparatus main body side. The rigidity of the cable cover can be set freely at the target position.

According to a fifth aspect of the present invention, in the recording apparatus according to any one of the first to fourth aspects, the rigidity of the cable cover can be set more finely by configuring each sheet material from a different material. Further, for example, a material that is excellent in bending durability or the like but has a high cost can be used only in a necessary portion, thereby reducing the cost of the entire cable cover.

The invention according to claim 6 is the recording apparatus according to any one of claims 1 to 5, wherein the sheet material constituting the cable cover is made of a conductive material or a material having a conductive layer. Can be provided with a shielding effect against radiation noise.

  The present invention relates to a recording apparatus using an ink jet recording method or the like, in which the recording apparatus main body control unit and the recording unit are electrically connected, and the rigidity of the flexible cable for transmitting print information from the recording apparatus main unit control unit to the recording unit is freely set. Even when the flexible cable is complicated to roll, it has a high follow-up to the movement of the recording means and can effectively suppress vibration and floating of the flexible cable. The configuration includes a recording unit that reciprocates in the main scanning direction to form an image on a recording medium, a conveying unit that conveys the recording medium in a sub-scanning direction orthogonal to the main scanning direction, and a recording unit that controls the recording unit. A flexible cable for transmitting printing information to the cable, and the flexible cable disposed along the flexible cable and bent together with the flexible cable. Consists cable cover, the cable cover is composed of at least two sheet materials, the thickness of each sheet material is formed differently respectively.

FIG. 1 is a perspective view illustrating a flexible cable mounting configuration of the recording apparatus according to the first exemplary embodiment of the present invention. In FIG. 1, for convenience of explanation, the flexible cable and the cable cover are partially cut away.
A recording apparatus such as an ink jet printer includes a recording unit including a recording head 3 mounted on a carriage 2 that reciprocates in a main scanning direction x, and a conveyance belt that conveys a recording medium in a sub-scanning direction y orthogonal to the main scanning direction x. 4. A conveying means including a conveying roller, a guide plate and the like is provided. A chassis 5 to which a guide rod 1 for slidably supporting the carriage 2 is attached is fixed to a base 6, and a carriage 2 on which a recording head 3 for forming an image is mounted is slidably attached to the guide rod 1. It has been. A flexible cable 8 is provided to electrically connect the control unit provided in the main body of the recording apparatus and the recording head 3 and to transmit print information from the control unit to the recording head 3 as an electrical signal. The cable 8 is fixed to the main body by a cable pressing member 7 attached to the chassis 5, and a loop is formed between the cable pressing member 7 and a connector 11 (see FIG. 2) on the board mounted on the carriage 2. It is arranged. The flexible cable 8 is provided with a cable cover 9 along the inner surface side of the bent flexible cable 8.

FIG. 2 is a plan view schematically showing the behavior of the flexible cable when the carriage moves to the left and right ends.
The loop shape of the flexible cable 8 is as shown in 8a when the carriage 2 is moved to the left end, and as shown in 8b when the carriage 2 is moved to the right end. In FIG. 2, a circle 20 a represents the minimum bending radius portion, and a circle 21 a represents the floating of the flexible cable 8 in the vicinity of the cable pressing member 7.

FIG. 3 is a plan view showing the behavior of the flexible cable and the force acting on the flexible cable when the carriage at the left end returns in the right direction.
In FIG. 3, a circle 20b represents the minimum bending radius portion as in FIG. When the carriage 2 moves further to the right from the position shown in FIG. 3, there is a possibility that the flexible cable 8 c that is lifted by the forces F <b> 1 and F <b> 2 is caught in the carriage 2.

FIG. 4 is a perspective view illustrating a cable cover used in the recording apparatus according to the first embodiment.
As shown in FIG. 2, the flexible cable 8 used in the recording apparatus of the first embodiment has a curvature of the minimum bending radius portion 20 a of the flexible cable 8 when the carriage 2 is guided by the guide rod 1 and moves to the left end of the chassis 5. 3, as shown in FIG. 3, the floating of the flexible cable that occurs when the carriage 2 moves to the right prevents the cable 2 from being caught in the carriage 2, and the followability to the movement of the carriage 2 is high. ing. For this reason, in order to ensure the curvature of the minimum bending radius part 20a of the flexible cable 8 and to ensure durability, the sheet material 30a on the carriage side has a shape that is more flexible than other sheet materials. A material having excellent bending durability is selected.

  As shown in FIG. 4, the cable cover 9 provided along the surface of the flexible cable 8 includes a carriage side sheet material 30a, an intermediate sheet material 31a, and a main body side sheet material 32, and the carriage side sheet. The material 30a, the intermediate sheet material 31a, and the sheet material 32 on the main body side have different plate thicknesses. As the material of each sheet material, PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PC (polycarbonate), PE (polyethylene), PI (polyimide), PVC (polyvinyl chloride), PPE (polyphenylene ether), Sheet materials such as PP (polypropylene), PBT (polybutylene terephthalate), urethane, and SUS are used. Each sheet material is stuck by a fixing means 40 such as double-sided tape, adhesion, or welding. Further, a plurality of sheet materials may be combined, and may be provided not only on the inside and outside of the flexible cable scooping but also on both sides.

FIG. 5 is a perspective view showing a connection structure between the flexible cable and the cable cover.
As shown in FIG. 5, the cable cover 9 and the flexible cable 8 constituted by the carriage-side sheet material 30 b and the intermediate sheet material 31 b are adhered by an adhering means 50 such as double-sided tape or adhesion. Adhesion in the vicinity of the minimum bending radius is not preferable because there is a risk of peeling of the adhesive and disconnection of the flexible cable at the boundary with the adhesive.

FIG. 6 is a perspective view showing a main body fixing structure of the flexible cable and the cable cover.
As shown in FIG. 6, the end of the cable cover 9 on the main body side is fixed so as to be sandwiched between the flexible cable 8 and the cable pressing member 7, and is connected to the main body control unit through the hole 10 formed in the chassis 5. Yes. As shown in FIG. 6, if the end of the cable cover 9 on the main body side is fixed in a slidable state in the longitudinal direction, the expansion / contraction difference due to the bending radius difference with the flexible cable 8 is absorbed, and the carriage is positioned at which position. Even if it moves, the relative position of the flexible cable 8 and the cable cover 9 can always be kept appropriate. On the contrary, the same effect can be obtained even when the carriage is slidable.

FIG. 7 is a back view showing different main body fixing structures of the flexible cable and the cable cover.
As shown in FIG. 7, the cable cover 9 is provided with protrusions 60 protruding from both side ends, and the protrusions 60 are accommodated in the enlarged diameter holes 7 a formed in the cable pressing member 7, so that the cable cover 9 is connected to the cable pressing member. If it is configured so that it cannot be easily pulled out from 7, it is possible to avoid the danger that the user accidentally removes the cable cover 9 during operations such as removing a paper jam.

FIG. 8 is a perspective view illustrating a cable cover used in the recording apparatus according to the second embodiment.
The cable cover 9 used in the recording apparatus according to the second embodiment includes a carriage-side sheet material 30c and a main body-side sheet material 31c. The thickness of the carriage-side sheet material 30c is greater than the thickness of the main body-side sheet material 31c. Is also formed thin. The carriage-side sheet material 30c becomes the minimum bending radius when the carriage 2 (not shown) moves to the left end of the frame 5, imparts appropriate tension to the flexible cable (not shown), ensures curvature, and improves bending durability. The flexible cable floats and gets caught by the sheet material 31c on the side.

FIG. 9 is a plan view illustrating the behavior of the flexible cable and the force acting on the flexible cable when the carriage of the recording apparatus according to the second embodiment returns to the right from the left end.
When the carriage 2 of the recording apparatus of Example 2 returns from the left end of the frame 5 to the right, the behavior of the flexible cable 8, the loop shape 8c, the forces F1 and F2 acting on the flexible cable 8, the force F3 generated by the cable cover 9, F4 is as shown in FIG. In FIG. 9, 20 c represents a minimum bending radius portion, and 21 c represents a float in the vicinity of the cable pressing member 7. At the minimum bending radius portion 20c, an appropriate tension is applied to the flexible cable by the force F3, and the forces F1 and F2 generated when the carriage 2 tries to return to the right side are effectively suppressed by the force F4 based on the stiffness of the cable cover 9. be able to.

FIG. 10 is a perspective view illustrating a cable cover used in the recording apparatus according to the third embodiment.
The cable cover 9 used in the recording apparatus of Embodiment 3 uses a material having excellent durability or a soft material for the sheet material 30d on the carriage side, and a hard material for the sheet material 31d on the main body side. Further, the performance can be further improved, and the material cost can be made lower than that of the single cover by using only the necessary minimum sheet material when using a material having high performance but high cost. As the material of the sheet material, a sheet material such as PET, PEN, PC, PE, PI, PVC, PPE, PP, PBT, urethane, SUS or the like is used.

FIG. 11 is a perspective view illustrating a flexible cable and a cable cover used in the recording apparatus according to the fourth embodiment.
The cable cover 9 used in the recording apparatus according to the fourth embodiment includes a sheet material 30e on the carriage side and a sheet material 31e on the main body side. A hole 70 is provided in the sheet material 31e on the main body side, and is grounded to the apparatus main body by screws or the like. By doing so, it becomes possible to obtain a shielding effect against radiation noise. The cable cover 9 may be further arranged on both sides so as to cover the flexible cable 8. As the material of the sheet materials 30e and 31e, SUS sheet material, PET, PEN, PC, PE, PI, PVC, PPE, PP, PBT, urethane, epoxy sheet material, etc., conductive materials such as Al, Ag, Cu, etc. A sheet material coated or laminated with a magnetic material such as a magnetic material or ferrite is used.

FIG. 12 is a perspective view illustrating a cable cover used in the recording apparatus according to the fifth embodiment.
As shown in FIG. 12, the cable cover 9 used in the recording apparatus according to the fifth embodiment is changed so that the width of the sheet material 30f on the carriage side constituting the cable cover 9 is continuously reduced toward the carriage side. Thus, the width of the sheet material at the minimum bending radius portion approaching the carriage is the narrowest, and the rigidity is reduced. For this reason, similar to the effect produced by the cable cover used in the recording apparatuses of the second and third embodiments, the flexible cable is provided with an appropriate tension using a sheet material narrower than other sheet materials at the minimum bending radius portion. Thus, it is possible to improve the bending durability and use a sheet material having a width wider than that of other sheet materials at a place where suppression is required, thereby obtaining an effect of preventing entrainment due to floating.

FIG. 13 is a perspective view illustrating a cable cover used in the recording apparatus according to the sixth embodiment.
As shown in FIG. 13, the cable cover 9 used in the recording apparatus of the sixth embodiment has a width of the sheet material 30g on the carriage side that constitutes the cable cover 9 at the minimum bending radius portion or the width of other portions. It is formed narrower than the width of the sheet material, and the rigidity is lowest in the cable cover 9 at the minimum bending radius portion.
For this reason, similarly to the cable cover of the fifth embodiment, the curvature of the flexible cable 8 at the minimum bending radius portion is secured to improve the bending durability, and the portion that needs to be suppressed is wider than other sheet materials. It is possible to prevent entrainment due to floating by using a sheet material.

FIG. 3 is a perspective view illustrating a flexible cable attachment configuration of the recording apparatus according to the first exemplary embodiment. It is a top view which shows typically the behavior of a flexible cable when a carriage moves to the left and right ends. It is a top view which shows the behavior of the flexible cable when the carriage in the left end returns to right direction, and the force which acts on a flexible cable by it. 3 is a perspective view showing a cable cover used in the recording apparatus of Embodiment 1. FIG. It is a perspective view which shows the connection structure of a flexible cable and a cable cover. It is a perspective view which shows the main body fixing structure of a flexible cable and a cable cover. It is a back view which shows the main body fixing structure from which a flexible cable and a cable cover differ. 6 is a perspective view illustrating a cable cover used in the recording apparatus of Embodiment 2. FIG. It is a top view which shows the behavior of the flexible cable when a carriage returns to the right direction from a left end, and the force which acts on a flexible cable by it. 6 is a perspective view illustrating a cable cover used in the recording apparatus of Embodiment 3. FIG. FIG. 10 is a perspective view illustrating a flexible cable and a cable cover used in the recording apparatus of Example 4. FIG. 10 is a perspective view showing a cable cover used in the recording apparatus of Example 5. FIG. 10 is a perspective view showing different cable covers used in the recording apparatus of Example 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Guide rod, 2 ... Carriage, 3 ... Recording head (recording means), 4 ... Conveyance belt (conveyance means), 5 ... Chassis, 6 ... Base, 7 ... Cable pressing member, 8 ... Flexible cable, 8a ... Left end movement Flexible cable loop shape, 8b ... flexible cable loop shape when moving right end, 9 ... cable cover, 10 ... chassis hole, 11 ... connector, 20, 20a, 20b, 20c ... flexible cable minimum bending radius, 21, 21 a, 21 b, 21 c... Floating flexible cable, 30 a, 30 b, 30 c, 30 d, 30 e, 30 f, 30 g... Sheet material 2, 32 constituting the flexible cable ... Flexible cable Sheet 3,40,50 ... fixing member constituting the Le, 60 ... projections 60, 70 ... hole in the cable cover of the cable cover 9, x ... main scanning direction, y ... sub-scanning direction.

Claims (6)

Recording means for reciprocating in the main scanning direction to form an image on the recording medium, conveying means for conveying the recording medium in the sub-scanning direction orthogonal to the main scanning direction, and printing information from the recording apparatus main body control unit to the recording means A flexible cable for transmitting the cable, and a cable cover disposed along the flexible cable and bent together with the flexible cable.
The cable cover is configured by fixing at least two sheet materials by fixing means ,
Among the sheet materials constituting the cable cover, the flexibility of the sheet material at the minimum bending radius is higher than the flexibility of the sheet material in the vicinity of the cable pressing member that fixes the flexible cable to the recording apparatus main body. A recording apparatus. The recording apparatus according to claim 1, of the sheet material constituting the cable cover, the thickness of the sheet material of the minimum bending radius portion, characterized in that less than the thickness of the sheet material in the vicinity of the cable pressing member A recording device. 3. The recording apparatus according to claim 1, wherein a width in the short direction of the sheet material of the minimum bending radius portion is narrower than a width in the short direction of the sheet material near the cable pressing member. Recording device. 4. The recording apparatus according to claim 1, wherein the width of the sheet material constituting the cable cover in the short direction is the smallest in the short direction of the sheet material of the minimum bending radius portion. 5. A recording apparatus characterized by continuously changing . 5. The recording apparatus according to claim 1, wherein the sheet material of the minimum bending radius portion is made of a material different from the sheet material in the vicinity of the cable pressing member . 6. A recording apparatus according to claim 1 , wherein the sheet material constituting the cable cover is made of a conductive material or a material having a conductive layer .