JP2004001971A - Feeding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce noise generated at the time of an action of a recording device, and improve accuracy of feeding papers. <P>SOLUTION: This feeding device for feeding a recorded material in the recording device comprises a roller moving the recorded material; a motor having a drive shaft, a bearing supporting the drive shaft, and a drive part driving the drive shaft; a belt wound around the drive shaft and the roller; and an energization means for applying a force to the drive shaft outside the motor in a manner to cancel displacement against the drive part of the drive shaft caused by the tension of the belt. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a recording material feeding device. In particular, the present invention relates to a feeding device capable of reducing noise generated during the operation of a recording device and improving paper feeding accuracy.
[0002]
[Prior art]
The feeding device is used for moving a recording object in a recording device such as an ink jet recording device. As a feeding device, for example, there is a form in which a driving force of a motor is transmitted to a roller that moves a recording material via a belt.
[0003]
[Problems to be solved by the invention]
However, in the case of a recording device using a belt, the shaft of the motor is displaced from the center due to the tension of the belt, which causes radial vibration between the shaft of the motor and the electromagnet inside the motor, thereby generating noise. . Further, the life of the motor is shortened because the bearing of the motor is worn by friction. Further, the vibration generated by the motor is transmitted to the housing of the recording device, and the housing vibrates. Further, when the shaft of the motor is displaced due to the tension of the belt, the distance between the shaft of the motor and the roller changes, so that the accuracy of paper feeding decreases.
[0004]
Therefore, an object of the present invention is to provide a feeding device that can solve the above-described problems. This object is achieved by a combination of features described in the independent claims. The dependent claims define further advantageous embodiments of the present invention.
[0005]
[Means for Solving the Problems]
That is, according to a first embodiment of the present invention, there is provided a feeding device for feeding a recording material in a recording device, wherein the feeding device includes a roller for moving the recording material, a driving shaft, and the driving shaft. Bearing, and a motor having a drive unit for driving the drive shaft, a belt wrapped around the drive shaft and the rollers, and to cancel the displacement of the drive shaft with respect to the drive unit caused by the tension of the belt, Biasing means for applying a force to the drive shaft outside the motor. Preferably, the urging means applies a force to the drive shaft at a position closer to the belt than the bearing. Further, it is preferable that the direction in which the urging means applies a force to the drive shaft and the direction of the tension applied by the belt to the drive shaft are on the same straight line.
[0006]
Further, the biasing means includes a contact portion that contacts the drive shaft, a biasing device support portion that is provided to protrude from the housing of the recording device, and a coil spring that presses the contact portion in a direction away from the biasing device support portion. It is preferable to further have a spring shaft which is arranged at the center of the axis of the coil spring, and whose end is respectively supported by the contact portion and the urging means support portion, and which can move in the axial direction. Preferably, the feeding device includes a plurality of belts, and the biasing unit applies a force to the drive shaft so as to cancel a displacement of the drive shaft with respect to the bearing caused by a resultant force of the plurality of belts. It is preferable that an elastic body is further provided between the motor and the housing of the recording apparatus.
[0007]
Note that the above summary of the present invention does not list all of the necessary features of the present invention, and a sub-combination of these features may also be an invention.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the claimed invention, and all combinations of features described in the embodiments are solutions of the invention. It is not always necessary for the means.
[0009]
FIG. 1 is a schematic side view showing an internal configuration of an ink jet recording apparatus 10 which is an example of a feeding apparatus. SUMMARY OF THE INVENTION It is an object of the present invention to reduce noise generated during the operation of a recording apparatus and to improve paper feeding accuracy. As shown in FIG. 1, the ink jet recording apparatus 10 includes a placement unit 12 that holds a plurality of recording objects 152 and a feeding unit that takes out one recording object 152 from the placement unit 12 and feeds the recording object 152 for printing. The feeding unit 20, the conveying unit 102 that transmits power in the feeding direction to the recording object 152 fed by the feeding unit 20, the printing unit 40 that prints on the recording object 152, and the printed recording object 152. A discharging unit 104 for transmitting power in the discharging direction is provided in this order in the feeding direction. Further, the ink jet recording apparatus 10 includes a housing 112 for storing the above-described components.
[0010]
The feeding unit 20 includes, for example, a substantially fan-shaped feeding roller 22 that is rotated by a motor (not shown) and a separation pad 24 that is rotatably attached to a shaft at an upstream end in the feeding direction and pressed by the feeding roller 22. The recording material 152 is sandwiched between the contact points between the feeding roller 22 and the separation pad 24, so that the recording materials 152 are separated one by one and fed to the transport unit 102.
[0011]
The transport unit 102 includes a transport roller 32 that is rotated by a motor 106 and a transport driven roller 34 that follows the transport roller 32. By sandwiching the recording object 152 at a contact point between the transport roller 32 and the transport driven roller 34, The recording object 152 fed by the feeding unit 20 is fed to a lower part of the printing unit 40.
[0012]
The printing unit 40 includes a carriage 42 on which an ink cartridge is mounted, a head unit 44 for discharging ink, and a shaft hole 46 provided on the carriage 42, and a shaft hole 46 provided on the carriage 42. And a guide shaft 48 for slidably supporting the carriage 42 in a direction substantially perpendicular to the feeding direction, and a control unit 49 for controlling printing. The head section 44 has a plurality of ink ejection ports arranged along the feeding direction of the recording object 152.
[0013]
The discharge unit 104 includes a discharge roller 52 that is rotated by a motor 106 and a discharge driven roller 54 that rotates with the discharge roller 52, and the recording object 152 is sandwiched between contact points between the discharge roller 52 and the discharge driven roller 54. Then, the printed recording material 152 is discharged.
[0014]
The transport driven roller 34 is provided above the transport roller 32 and closer to the head 44 than the transport roller 32, and the discharge driven roller 54 is provided above the discharge roller 52 and closer to the head 44 than the discharge roller 52. Can be Therefore, the recording object 152 bends downward at a position opposing the printing unit 40.
[0015]
In the configuration described above, the ink jet recording apparatus 10 ejects ink while reciprocating the head unit 44 along the guide shaft 48. The printing unit 40 prints the entire recording object 152 by feeding the recording object 152 every time the head unit 44 performs one scan. Note that the head unit 44 may perform printing on both the outward route and the return route, or may perform printing on only one of the routes.
[0016]
Power is transmitted from the motor 106 to the transport unit 102 and the discharge unit 104 via a single belt 126. The motor 106, the transport unit 102, and the discharge unit 104 are arranged in this order along the flow direction of the belt 126. The transport unit 102, the discharge unit 104, the motor 106, and the belt 126 constitute a feeding device 100 that feeds the recording object 152 in the inkjet recording device 10.
[0017]
2 and 3 show a detailed configuration of the feeding device 100 according to an embodiment of the present invention. FIG. 2 shows a side surface of the feeding device 100, and FIG. 3 shows a cross section of the feeding device 100 shown in FIG.
[0018]
The feeding device 100 includes a transport unit 102, a discharge unit 104, a belt 126, a motor 106, an elastic body 108, a drive shaft pulley 110, and an urging unit 150.
[0019]
As illustrated in FIG. 3, the motor 106 includes a drive shaft 122, a drive unit 170 that drives the drive shaft 122, and a bearing 140 that supports the drive shaft 122. The motor 106 drives the belt 126 via the drive shaft pulley 110 by rotating the drive shaft 122, and drives the transport unit 102 and the discharge unit 104. The elastic body 108 is sandwiched between the motor 106 and the side wall of the housing 112, and prevents the motor 106 from directly contacting the housing 112, so that vibration generated when the motor 106 is driven is transmitted to the housing 112. Absent. Therefore, it is possible to reduce the sound generated when the recording device 10 operates.
[0020]
In FIG. 3, when the motor 106 rotates the drive shaft 122 and drives the belt 126, the belt 126 is bent and stretched, and a force for displacing the drive shaft 122 with respect to the drive unit 170 is generated. Therefore, the urging unit 150 applies a force to the drive shaft 122 so as to cancel the displacement of the drive shaft 122 with respect to the drive unit 170 caused by the tension of the belt 126. In FIG. 2, the direction in which the urging means 150 applies a force to the drive shaft 122 and the direction in which the belt 126 applies a tension to the drive shaft 122 are on the same straight line. Further, as shown in FIG. 3, the urging means 150 applies a force to the drive shaft 122 at a position closer to the belt 126 than the bearing 140. Therefore, since the displacement of the drive shaft 122 with respect to the drive unit 170 can be canceled by adjusting the biasing force of the biasing means 150, noise caused by the displacement of the drive shaft 122 can be reduced.
[0021]
The urging means 150 includes a contact portion 118 that contacts the drive shaft 122, an urging means support portion 112 provided to protrude from a side wall of the housing 112 of the recording apparatus 10, and a contact portion 118 that urges the contact portion 118. The coil spring 116 is pressed down in a direction away from the coil spring 116, and the spring shaft 114 is disposed at the center of the axis of the coil spring 116, and each end is supported by the contact portion 118 and the urging means support portion 112, and is movable in the axial direction. Have. In the feeding device 100 of the present embodiment, the biasing unit 150 can suppress the displacement of the drive shaft 122 with respect to the drive unit 170. Therefore, the feeding device 100 according to the present embodiment can reduce noise generated during the operation of the recording device 10 and improve paper feeding accuracy.
[0022]
FIG. 4 shows another embodiment of the feeding device 100. The feeding device 100 shown in FIG. 4 includes a plurality of belts 126A and 126B. The belt 126 </ b> A transmits the power of the motor 106 to the transport unit 102. On the other hand, the belt 126 </ b> B transmits the power of the motor 106 to the discharge unit 104. The configuration other than the belts 126A and 126B is the same as the configuration of the embodiment shown in FIGS. 2 and 3, and thus the description is omitted. In the case of the present embodiment, the drive shaft 122 is displaced with respect to the bearing 140 due to the resultant force of the plurality of belts 126A and 126B. Therefore, the urging means 150 applies a force to the drive shaft 122 so as to cancel the displacement of the drive shaft 122. Therefore, even when a plurality of belts 126A and 126B are used, the feeding device 100 of this embodiment suppresses the displacement of the drive shaft 122 caused by the tension of the belts 126A and 126B by providing the urging means 150. be able to. Therefore, the feeding device 100 can reduce noise generated during the operation of the recording device 10 and improve the accuracy of paper feeding.
[0023]
As described above, the present invention has been described using the embodiments, but the technical scope of the present invention is not limited to the scope described in the above embodiments. Various changes or improvements can be added to the above embodiment. It is apparent from the description of the appended claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.
[0024]
【The invention's effect】
As is apparent from the above description, according to the present invention, it is possible to reduce the noise generated during the operation of the recording apparatus and to improve the accuracy of paper feeding.
[Brief description of the drawings]
FIG. 1 shows an internal configuration of an ink jet recording apparatus 10 which is an example of a printing apparatus.
FIG. 2 shows a detailed configuration of a feeding device 100 according to an embodiment of the present invention.
FIG. 3 shows a detailed configuration of a feeding device 100 according to an embodiment of the present invention.
FIG. 4 shows another embodiment of the feeding device 100.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Ink-jet recording apparatus, 12 ... Placement part, 20 ... Feeding part, 22 ... Feeding roller, 24 ... Separation pad, 26 ... Shaft, 32 ... Transport Roller, 34: conveyance driven roller, 40: printing unit, 42: carriage, 44: head unit, 46: shaft hole, 48: guide shaft, 49: control unit , 52: discharge roller, 54: discharge driven roller, 100: feeding device, 102: transport unit, 104: discharge unit, 106: motor, 108: elastic body , 110: drive shaft pulley, 112: urging means support portion, 114: spring shaft, 116: coil spring, 118: contact portion, 122: drive shaft, 126 ... Belt, 140: bearing, 150: urging means, 152: recording object 170 ... drive unit

Claims (6)

A feeding device for feeding a recording material in the recording device,
A roller for moving the recording medium,
A drive shaft, a bearing that supports the drive shaft, and a motor having a drive unit that drives the drive shaft;
A belt wound around the drive shaft and the roller,
A feeding device for applying a force to the drive shaft outside the motor so as to cancel a displacement of the drive shaft with respect to the drive portion caused by the tension of the belt. 2. The feeding device according to claim 1, wherein the urging unit applies a force to the drive shaft at a position closer to the belt than the bearing. 3. 2. The feeding device according to claim 1, wherein a direction in which the urging unit applies a force to the drive shaft and a direction in which the belt applies a tension to the drive shaft are on the same straight line. . The urging means,
A contact portion that contacts the drive shaft;
An urging means supporting portion provided to protrude from a housing of the recording device;
A coil spring that presses the contact portion in a direction away from the urging means support portion;
2. The spring according to claim 1, further comprising an axially movable spring shaft arranged at the center of the axis of the coil spring, each end of which is supported by the contact portion and the biasing means support portion. A feeding device as described. Comprising a plurality of the belts,
2. The feeding device according to claim 1, wherein the urging unit applies a force to the drive shaft so as to cancel a displacement of the drive shaft with respect to the bearing caused by a resultant force of the plurality of belts. 3. The feeding device according to claim 1, wherein an elastic body is further provided between the motor and a housing of the recording device.

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