JP3705103B2 - Carriage guide shaft support device and recording device of recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the durability, and adjust and set a parallelism of a carriage guide shaft well. SOLUTION: In a device 80 for supporting the carriage guide shaft 26 of a recording apparatus which is provided with a bearing 79 for supporting the carriage guide shaft rotatably to a left side frame 16, the bearing includes a bearing setting member 82 set rotatably to the side frame and formed of a flexible material, and a bearing bush 81 formed of an abrasion resistant material which is mounted in the bearing setting member 82 to rotate integrally with the bearing setting member and supports an eccentric axial part 72 of the carriage guide shaft rotatably. The bearing is constituted to be eccentric by an eccentricity amount K to the eccentric axial part of the carriage guide shaft. The parallelism of the carriage guide shaft is adjusted by rotating the bearing setting part of the bearing. It becomes possible to set the parallelism by deflecting and deforming an engagement arm 95 thereby engaging the arm with a groove 98 of a groove array 97 of the side frame.

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a carriage guide shaft support device of a recording device that supports a carriage guide shaft, and a recording device including the carriage guide shaft support device and a platen gap adjustment mechanism (automatic sheet thickness adjustment mechanism).
[0002]
[Prior art]
2. Description of the Related Art Conventionally, for example, in a dot impact type recording apparatus, a carriage guide shaft in which a recording head is arranged via a carriage is supported by a carriage guide shaft support device, and further, the carriage guide shaft is rotated so that the recording head and the platen are rotated. The platen gap between the two is adjusted by a platen gap adjusting mechanism.
[0003]
As shown in FIG. 13, the carriage guide shaft support device 200 pivotally supports an eccentric shaft portion 202 of a carriage guide shaft 201 on a side frame 204 using a bearing 203 having an integral structure.
[0004]
[Problems to be solved by the invention]
If the above-described integrated bearing 203 is made of a flexible resin, the carriage guide shaft 201 is frequently rotated by the platen gap adjusting mechanism, so that the bearing 203 is worn and its durability is lowered. Resulting in.
[0005]
In order to improve the durability of the bearing 203, when the bearing 203 having a single structure is made of metal, for example, sintered metal, the shaft center of the bearing 203 is attached to the side frame 204 when the bearing 203 is attached to the side frame 204. In order to stand upright vertically, a mounting flange must be provided on the bearing 203, and a screw or the like is inserted into the mounting flange to fix the bearing 203 to the side frame 204 with screws or bolts. For this reason, the installation space of the bearing 203 will increase.
[0006]
Further, if the bearing 203 is made of metal, for example, sintered metal, the bending deformation cannot be used. Therefore, after the bearing 203 is configured eccentrically with respect to the carriage guide shaft 201 and the carriage guide shaft 201 is adjusted parallel to the platen. In this position, it is impossible to set the carriage guide shaft 201 using the bending deformation of the bearing 203.
[0007]
SUMMARY OF THE INVENTION An object of the present invention has been made in consideration of the above-described circumstances, and can improve the durability, and also can adjust and set the parallelism of the carriage guide shaft, and the carriage guide shaft support device and the recording device of the recording device. Is to provide.
[0008]
[Means for Solving the Problems]
According to the first aspect of the present invention, in the carriage guide shaft support device of a recording apparatus provided with a bearing that pivotally supports the carriage guide shaft on the main body frame, the bearing is rotatably attached to the main body frame. A bearing mounting portion made of a flexible material, a bearing bush made of a wear-resistant material and rotatably mounted in the bearing mounting portion, and rotatably supporting the end portion of the carriage guide shaft. And the bearing is eccentric with respect to the end portion of the carriage guide shaft, and the bearing mounting portion of the bearing is rotated, bent, deformed, and locked to the main body frame. The parallelism of the guide shaft is configured to be settable.
[0009]
According to a second aspect of the present invention, in the first aspect of the present invention, the bearing includes a carriage guide in which an outer peripheral surface and an inner peripheral surface of the bearing mounting member or an outer peripheral surface and an inner peripheral surface of the bearing bush are eccentric. It is characterized by being eccentric with respect to the end of the shaft.
[0010]
According to a third aspect of the present invention, in the invention according to the first or second aspect, the bearing mounting member, the bearing bush, and the bearing mounting member are brought into contact with the flange surface of the bearing bush in the bearing. It is characterized in that it is configured to be able to match the axial centers.
[0011]
According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects of the present invention, in the bearing, either the inner peripheral surface of the bearing mounting member or the outer peripheral surface of the bearing bush, and the other The abutting rib is provided.
[0012]
According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the bearing is provided with a notch in a body portion of a bearing mounting member to which a bearing bush can be attached. It is what.
[0013]
According to a sixth aspect of the present invention, there is provided a carriage guide shaft support device including a bearing that pivotally supports a carriage guide shaft on a main body frame, and the carriage guide shaft is rotated so that the carriage guide shaft is supported by a carriage. A platen gap adjusting mechanism for adjusting a platen gap between the recording head and the platen arranged via the platen, wherein the bearing in the carriage guide shaft support device is rotatable on the main body frame. A bearing mounting portion made of a flexible material, and a bearing bush made of a wear-resistant material, rotatably mounted in the bearing mounting portion, and rotatably supporting the end portion of the carriage guide shaft. The bearing is configured to be eccentric with respect to the end portion of the carriage guide shaft. Parts rotated to the flexural deformation to be by locking to the main frame, it is characterized in that the parallelism of the carriage guide shaft is configured to be set.
[0014]
The invention according to claim 7 is the invention according to claim 6, wherein the bearing of the carriage guide shaft support device has an outer peripheral surface and an inner peripheral surface of a bearing mounting member, or an outer peripheral surface and an inner peripheral surface of a bearing bush. Is decentered and is decentered with respect to the end of the carriage guide shaft.
[0015]
The invention according to claim 8 is the invention according to claim 6 or 7, wherein in the bearing of the carriage guide shaft support device, the end surface of the bearing mounting member abuts on the flange surface of the bearing bush. The mounting member and the bearing bush are configured to be able to coincide with each other.
[0016]
The invention according to claim 9 is the invention according to any one of claims 6 to 8, wherein in the bearing of the carriage guide shaft support device, either the inner peripheral surface of the bearing mounting member or the outer peripheral surface of the bearing bush. One of them is provided with a rib that abuts against the other.
[0017]
According to a tenth aspect of the present invention, in the invention according to any of the sixth to ninth aspects, in the bearing of the carriage guide shaft support device, a notch is formed in a body portion of a bearing mounting member to which a bearing bush can be attached. It is provided.
[0018]
The invention according to claim 1 or 6 has the following effects.
[0019]
In the bearing, since the bearing bush that rotatably supports the end portion of the carriage guide shaft is made of a wear-resistant material, the durability of the bearing can be improved.
[0020]
The bearing mounting portion of the bearing is made of a flexible material. The bearing mounting portion is rotated with respect to the main body frame, the carriage guide shaft is adjusted parallel to the platen, and the bearing mounting portion is bent and deformed. Then, by engaging the main body frame, the parallelism of the carriage guide shaft can be set to an adjusted position, so that the parallelism of the carriage guide shaft can be adjusted and set satisfactorily.
[0021]
The invention according to claim 2 or 7 has the following effects.
[0022]
The bearing is configured such that the outer peripheral surface and inner peripheral surface of the bearing mounting member or the outer peripheral surface and inner peripheral surface of the bearing bush are eccentric and are eccentric with respect to the end portion of the carriage guide shaft. In any case, the carriage guide shaft can be moved in the direction of contact with or separated from the platen by rotating the bearing by moving, so that the parallelism of the carriage guide shaft can be adjusted well.
[0023]
The invention according to claim 3 or 8 has the following effects.
[0024]
The bearing is configured such that the end surfaces of the bearing mounting member abut against the flange surface of the bearing bush so that the shaft centers of the bearing mounting member and the bearing bush can coincide with each other. There is no twisting, the rotational load on the carriage guide shaft is reduced, and the carriage guide shaft is smoothly rotated. As a result, the detection accuracy when the automatic sheet thickness adjusting mechanism is used is improved.
[0025]
The automatic sheet thickness adjustment mechanism detects the sheet thickness by rotating the carriage guide shaft and detecting that the recording head has come into contact with the platen or sheet by the rotational load of the carriage guide shaft. In response, the carriage guide shaft is rotated to adjust the platen gap between the recording head and the platen. Therefore, by reducing the rotational load during rotation of the carriage guide shaft, the automatic sheet thickness adjusting mechanism can accurately measure that the recording head contacts the platen or sheet based on the rotational load of the carriage guide shaft. Therefore, since the sheet thickness of this sheet can be detected accurately, the platen gap can be adjusted with high accuracy.
[0026]
The invention according to claim 4 or 9 has the following effects.
[0027]
In the bearing, since either one of the inner peripheral surface of the bearing mounting member and the outer peripheral surface of the bearing bush is provided with a rib that contacts the other, the bearing mounting member and the bearing bush are connected to each other with the rib as a fulcrum. By relatively swinging, the shaft centers of the bearing mounting member and the bearing bush can be easily aligned, so that the carriage guide shaft and the bearing bush are not twisted, and the rotational load on the carriage guide shaft is reduced. The carriage guide shaft is smoothly rotated. As a result, the detection accuracy when the automatic sheet thickness adjusting mechanism is used is improved.
[0028]
The invention according to claim 5 or 10 has the following effects.
[0029]
In the bearing, the notch is provided in the body portion of the bearing mounting member to which the bearing bush can be mounted. Therefore, the notch has a flexibility that allows the diameter of the body portion to be expanded. Therefore, the carriage guide shaft and the bearing bush are not twisted, the rotational load on the carriage guide shaft is reduced, and the carriage guide shaft is smoothly rotated. As a result, the detection accuracy when the automatic sheet thickness adjusting mechanism is used is improved.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0031]
FIG. 1 is a perspective view showing a dot impact printer to which an embodiment of a recording apparatus according to the present invention is applied. FIG. 3 is a perspective view showing a printer body in the printer of FIG.
[0032]
A printer 10 as a recording apparatus shown in FIGS. 1 and 2 prints an image including characters by hitting a large number of recording wires on a sheet via an ink ribbon (both not shown) to record dots. It is a dot impact printer.
[0033]
The printer 10 includes a printer main body 11 as a recording apparatus main body, a push tractor unit 12 (FIG. 2) disposed on the rear side of the printer main body 11, and an exterior body that covers the upper and lower sides of the printer main body 11. The upper case 13A and the lower case 13B, the sheet supply guide 43 that is installed on the front side of the printer main body 11 and guides the supply of the cut sheet, and is installed on the rear side of the printer main body 11 and above the push tractor unit 12, And a cut sheet feeder 44 (FIG. 1) for supplying cut sheets one by one to the recording mechanism section of the printer main body 11.
[0034]
The sheet includes the cut sheet cut to a predetermined length and a continuous sheet in which a plurality of sheets are connected. Examples of the cut sheet include cut sheet paper, copy paper, cut film, and the like, and continuous sheets include continuous paper.
[0035]
3 and 6, the printer main body 11 includes a base frame 14, a rear frame 15, a left side frame 16, and a right side frame 17 as main body frames, a recording head 18 and a carriage 19 as recording mechanisms. And a platen 20, a sheet guide 25, a first conveyance roller 21, a second conveyance roller 22, a third conveyance roller 23, and a fourth conveyance roller 24 as a sheet conveyance mechanism unit.
[0036]
A left side frame 16 and a right side frame 17 are erected and fixed at substantially both ends of the base frame 14 and the rear frame 15. A carriage guide shaft 26 is bridged between the left side frame 16 and the right side frame 17 and is pivotally supported. Further, a platen 20 is bridged between the left side frame 16 and the right side frame 17 and is rotatably disposed, and a seat guide 25 is fixedly disposed.
[0037]
As shown in FIGS. 3 and 6, the sheet conveying mechanism including the platen 20 includes a first conveying roller 21 and a second conveying roller 22 on the front side of the printer main body 11 with respect to the platen 20. 23 and the fourth transport roller 24 are arranged on the rear side of the printer main body 11, respectively. The first conveyance roller 21 and the second conveyance roller 22 are arranged vertically in contact with each other to form a pair, and constitute a front side sheet conveyance roller 27. Further, the third conveyance roller 23 and the fourth conveyance roller 24 are arranged in a vertical contact with each other to form a pair, and constitute a rear side sheet conveyance roller 37.
[0038]
Among these, the 1st conveyance roller 21 and the 4th conveyance roller 24 are drive rollers as mentioned later, and the 2nd conveyance roller 22 and the 3rd conveyance roller 23 are driven rollers. The first transport roller 21 and the third transport roller 23 are disposed below the sheet guide 25 together with the platen 20, and the second transport roller 22 and the fourth transport roller 24 are disposed above the sheet guide 25. The upper portions of the platen 20, the first conveyance roller 21, and the third conveyance roller 23 are in a state of protruding above the sheet guide 25.
[0039]
The platen 20, the first transport roller 21, and the fourth transport roller 24 are rotationally driven in the forward or reverse direction by the drive wheel train 34 shown in FIG. The drive wheel train 34 is installed on one of the left side frame 16 and the right side frame 17, for example, the left side frame 16.
[0040]
The drive wheel train 34 includes a motor pinion 36 that is integrally fixed to a drive shaft of a sheet conveying motor 35 that can rotate forward or reverse. The driving force from the motor pinion 36 is transmitted to the platen 20 through a plurality of reduction gears 48, 49 and 50, and further transmitted from the reduction gear 50 to the first conveying roller 21 through reduction gears 51 and 52. Further, it is transmitted from the reduction gear 49 to the fourth conveying roller 24 via the reduction gears 53 and 54.
[0041]
As a result, the platen 20 and the first conveying roller 21 rotate in the same direction, and the fourth conveying roller 24 rotates in the opposite direction, so that the cut sheet or the continuous sheet is moved from the front to the rear of the printer main body 11 by the arrow A (FIG. 6). It can be conveyed in the direction, or it can be conveyed in the direction of arrow B (FIG. 6) from the rear to the front of the printer body 11. Accordingly, the cut sheet and the continuous sheet are conveyed in the sub-scanning direction orthogonal to the later-described main scanning direction of the carriage 19.
[0042]
The push tractor unit 12 shown in FIGS. 4 and 6 supplies a continuous sheet (for example, continuous paper) to the sheet conveying mechanism unit including the platen 20 and has a pair of left and right tractors 28. These tractors 28 include a tractor drive pulley (not shown) that is rotatably supported on the tractor drive shaft 29 and is axially slidable, and a tractor guide shaft 30 that is rotatably supported and slidable in the axial direction. A tractor belt 31 is wound around the tractor driven pulley (not shown) and a sheet pressing lid 32 is provided.
[0043]
The distance between the pair of tractors 28 can be adjusted according to the width dimension of the continuous sheet (continuous paper) to be conveyed. A plurality of pins 33 projecting from the entire outer periphery of the tractor belt 31 can be engaged with holes (not shown) drilled on both sides in the width direction of the continuous sheet. The tractor belt 31 is also driven by the drive wheel train 34 (FIG. 3).
[0044]
That is, the driving force from the motor pinion 36 of the drive wheel train 34 is pushed from the transmission gear 55 provided on the roller shaft of the fourth conveying roller 24 via the intermediate gears 56 and 57 as shown in FIG. This is transmitted to a tractor drive gear (not shown) fixed to the tractor drive shaft 29 of the tractor unit 12, whereby the tractor belt 31 of the push tractor unit 12 can be driven.
[0045]
The push tractor unit 12 includes a platen 20, a front side sheet conveying roller 27 (first conveying roller 21 and second conveying roller 22), and a rear side sheet conveying roller 37 (third conveying roller 23 and fourth conveying roller 24). A continuous sheet such as continuous paper is mainly conveyed from the back to the front of the printer body 11 in the direction of arrow B (FIG. 6), or can be conveyed from the front to the back of the printer body 11 in the direction of arrow A.
[0046]
The sheet supply guide 43 shown in FIG. 1 is detachably installed on the upper case 13 </ b> A on the front side of the printer main body 11. The sheet supply guide 43 guides the cut sheets, such as cut sheets or copy sheets, when the sheets are manually fed from the front to the back of the printer body 11 one by one. The cut sheet guided by the sheet supply guide 43 is conveyed by a sheet conveying mechanism such as the platen 20, the front side sheet conveying roller 27, and the rear side sheet conveying roller 37.
[0047]
Similarly, the cut sheet feeder 44 shown in FIG. 1 is installed on the rear side of the printer main body 11 and automatically supplies cut sheets such as cut sheets or copy sheets one by one from the rear to the front of the printer main body 11. It is.
[0048]
That is, although not shown, the cut sheet feeder 44 picks up and supplies the uppermost cut sheet from a hopper that holds a plurality of cut sheets in a stacked state by the rotation operation of the supply roller. The cut sheet that is double-fed together with the upper cut sheet is separated by a separation mechanism. One cut sheet is supplied to the printer main body 11 by one or more rotations of the supply roller.
[0049]
The supply roller of the cut sheet feeder 44 is also driven by the drive wheel train 34 (FIG. 3). That is, the driving force from the motor pinion 36 of the drive wheel train 34 is cut from the transmission gear 55 provided on the roller shaft of the fourth conveying roller 24 through the intermediate gears 56 and 57 as shown in FIG. This is transmitted to a supply roller driving gear (not shown) of the feeder 44, whereby the supply roller of the cut sheet feeder 44 is driven.
[0050]
The intermediate gear 57 can be selectively meshed with the supply roller driving gear of the cut sheet feeder 44 and the tractor driving gear of the push tractor unit 12 and the contact pressure of the rear side sheet conveying roller 37 can be changed. The release mechanism 58 is a mechanism that performs this. The release mechanism 58 switches the sheet use mode of the printer 10 in accordance with the type of sheet (cut sheet, continuous sheet) supplied to the printer 10, and includes a release shaft 59, a release lever 60, and a release drive motor 61. It is configured.
[0051]
A pinion 62 is formed at the end of the release shaft 59, and the pinion 62 is engaged with a rack 63 in the base portion 60 </ b> A of the release lever 60. Further, a rack (not shown) is formed on the base portion 60A of the release lever 60. This rack is engaged with a motor pinion (not shown) of the release drive motor 61, and the release lever 60 is driven by the release drive motor 61. 10 is movable in the front-rear direction.
[0052]
On the other hand, the release shaft 59 has a cam that moves the third transport roller 23 of the rear side sheet transport roller 37 in the direction of the fourth transport roller 24 or moves away from the fourth transport roller 24 by the rotation of the release shaft 59. (Not shown) is formed. In addition, the intermediate gear 57 is moved to the base 60A of the release lever 60 by the movement of the release lever 60, the tractor driving gear of the push tractor unit 12 and the supply roller driving gear of the cut sheet feeder 44 (the cut sheet feeder 44 is connected to the printer main body 11). The cam 64 is formed so that it can be engaged with the other.
[0053]
When the release lever 60 is moved and set to the continuous sheet position, and the printer 10 is switched to the continuous sheet use mode, the intermediate gear 57 is engaged with the tractor drive gear of the push tractor unit 12 by the action of the cam 64, and the push tractor The unit 12 is in an operating state, the release shaft 59 is rotated, and the third transport roller 23 of the rear side sheet transport roller 37 is separated from the fourth transport roller 24 by the action of the cam of the release shaft 59. The contact pressure between the third transport roller 23 and the fourth transport roller 24 is decreased.
[0054]
Further, when the release lever 60 is moved and installed at the cut sheet position and the printer 10 is switched to the cut sheet use mode, the cut sheet feeder 44 is attached to the printer main body 11 by the action of the cam 64. As long as the intermediate gear 57 is engaged with the supply roller driving gear of the cut sheet feeder 44, the cut sheet feeder 44 is in an operating state, and the release shaft 59 is rotated. The third conveyance roller 23 of the sheet conveyance roller 37 is pressed against the fourth conveyance roller 24 to increase the contact pressure between the third conveyance roller 23 and the fourth conveyance roller 24.
[0055]
Now, the carriage 19 shown in FIG. 3 is slidably inserted into the carriage guide shaft 26, is slidably contacted with the upper end of the rear frame 15, and further has a recording head 18 mounted thereon. Since the carriage guide shaft 26 is arranged in parallel with the platen 20, the carriage 19 is provided so as to be able to travel (scan) in the main scanning direction that coincides with the axial directions of the platen 20 and the carriage guide shaft 26.
[0056]
The carriage 19 is coupled to a timing belt 39 (FIG. 6) that is reciprocated by forward or reverse rotation of the carriage drive motor 38. Accordingly, the carriage 19 is guided to the carriage guide shaft 26 via the timing belt 39 by the forward or reverse rotation of the carriage drive motor 38, and is scanned leftward or rightward in FIG. 3 in the main scanning direction. Here, the carriage drive motor 38 is configured by, for example, a stepping motor together with the sheet conveyance motor 35, the release drive motor 61, and a sheet thickness detection motor 66 described later.
[0057]
Further, as shown in FIG. 5, the carriage 19 is provided with a ribbon cassette mounting portion 40, and a ribbon cassette 40 </ b> A containing an ink ribbon is mounted on the ribbon cassette mounting portion 40. Further, the carriage 19 is provided with a ribbon mask holder 41 for protecting the ink ribbon of the ribbon cassette from a sheet (cut sheet or continuous sheet) conveyed in contact with the platen 20. The ink ribbon in the ribbon cassette 40 </ b> A is provided so as to be movable in front of the recording wire of the recording head 18 by a ribbon drive shaft 42 installed in the ribbon cassette mounting portion 40.
[0058]
The recording head 18 includes a large number of recording wires (not shown), and the ink ribbon is positioned in front of the protruding direction of these recording wires as described above. While the recording head 18 travels in the main scanning direction together with the carriage 19, the recording wire protrudes and strikes the ink ribbon, and the ink of the ink ribbon is conveyed between the platen 20 and the recording head 18. It is attached to a sheet (cut sheet or continuous sheet), and an image including characters is recorded on this sheet.
[0059]
In the recording operation by the recording head 18, one line sentence is recorded by the recording wire of the recording head 18 while the carriage 19 travels leftward or rightward in the main scanning direction of FIG. 3, and this one line sentence is recorded. In addition, when the sheet is a cut sheet, the sheet conveying mechanism (the platen 20, the first conveying roller 21, the second conveying roller 22, the third conveying roller 23, and the fourth conveying roller 24) and the sheet are continuous sheets. In this case, the sheet conveying mechanism and the push tractor unit 12 convey the sheet by a predetermined length (for a normal line interval), and the operations are repeated.
[0060]
As shown in FIG. 5, the printer 10 rotates the carriage guide shaft 26, and measures that the recording head 18 is in contact with the platen 20 or the sheet by the rotation load of the carriage guide shaft 26. Then, an automatic sheet as a platen gap adjusting mechanism that detects the sheet thickness of the sheet and adjusts the platen gap between the recording head 18 and the platen 20 by rotating the carriage guide shaft 26 according to the sheet thickness. A thickness adjusting mechanism 65 (that is, an automatic paper thickness adjusting mechanism) is provided.
[0061]
The automatic sheet thickness adjusting mechanism 65 includes a sheet thickness detecting motor 66, a rotary encoder 67, an output gear 68, reduction gears 69, 70 and 71, and the reduction gear 71 is connected to both ends of the carriage guide shaft 26. It is being fixed to one of the eccentric shaft parts 72 of a part. The amount L of eccentricity of the eccentric shaft portion 72 with respect to the carriage guide shaft 26 is, for example, about 1 mm.
[0062]
The output gear 68 is fixed to the output shaft of the sheet thickness detection motor 66, and a reduction gear 69 is engaged with the output gear 68 as shown in FIG. The reduction gear 70 is formed integrally with the reduction gear 69 and meshes with the reduction gear 71. As a result, the driving force of the sheet thickness detecting motor 66 is transmitted to the eccentric shaft portion 72 via the output gear 68 and the reduction gears 69, 70 and 71, and the carriage guide shaft 26 is rotated. Then, the carriage guide shaft 26 moves up and down in the vertical direction by an amount corresponding to the eccentric amount L with respect to the eccentric shaft portion 72 (for example, 2 mm when L = 1 mm), and the recording head 18 is moved via the carriage 19. It contacts and separates from the platen 20.
[0063]
The rotary encoder 67 is a slit plate 73 provided integrally with the output shaft of the sheet thickness detection motor 66, and a light projecting / receiving device made of, for example, a light emitting diode or a photodiode, which is disposed to face the slit plate 73. 74. The light emitted from the light emitting diode of the light projecting / receiving device 74 and passing through the slit of the slit plate 73 is received by the photodiode of the light projecting / receiving device 74 and converted into a pulse wave. By counting this pulse wave, the sheet thickness The rotation angle of the detection motor 66 is detected.
[0064]
Detection of the sheet thickness and adjustment of the platen gap by the automatic sheet thickness adjusting mechanism 65 configured as described above are performed as follows.
[0065]
First, the sheet thickness detection motor 66 is rotated in a state where there is no sheet immediately above the platen 20, and the carriage guide shaft 26 is rotated in a direction in which the recording head 18 approaches the platen 20. When the recording head 18 approaches the platen 20, the rotational load of the carriage guide shaft 26 acts on the sheet thickness detection motor 66, and the stable position between the rotor and the stator of the sheet thickness detection motor 66 shifts, and the rotary encoder The period of the pulse waveform output from the 67 light emitter / receiver 74 (photodiode) becomes longer. That is, since the period Ti of the pulse waveform is longer than the theoretical value Tro, (Ti−Tro)> 0. When this (Ti-Tro) is accumulated and reaches the threshold value Tth, the rotation of the sheet thickness detection motor 66 is stopped, and the number of pulses that have driven the sheet thickness detection motor 66 (step motor) by that time. And the distance from the reference position (for example, the platen gap base position where the platen gap is maximized) to the platen 20 (platen surface) is measured.
[0066]
Next, the recording head 18 is raised and positioned at the reference position, and the sheet is positioned immediately above the platen 20. In this state, the sheet thickness detection motor 66 is rotated to rotate the carriage guide shaft 26 in the direction in which the recording head 18 contacts the sheet on the platen 20. When the recording head 18 comes into contact with the sheet on the platen 20, a rotational load of the carriage guide shaft 26 acts on the sheet thickness detection motor 66. Therefore, in the same manner as described above, the light emitter / receiver 74 (photodiode) of the rotary encoder 67 The difference (Ti−Tro) between the period (Ti) of the pulse waveform output from () and its theoretical value (Tro) is accumulated, and the accumulated value of (Ti−Tro) reaches the threshold value Tth. Then, the rotation of the sheet thickness detection motor 66 is stopped. The distance from the reference position to the sheet (sheet surface) on the platen 20 is measured by counting the number of pulses that drive the sheet thickness detection motor 66 (step motor) by that time.
[0067]
Thereafter, the difference between the sheet surface and the platen surface measured as described above is calculated to obtain the sheet thickness. Then, the sheet thickness detection motor 66 is driven to rotate the carriage guide shaft 26 to adjust the platen gap between the recording head 18 and the platen 20 according to the sheet thickness calculated as described above.
[0068]
The carriage guide shaft 26 is pivotally supported by the left side frame 16 and the right side frame 17 as described above using the carriage guide shaft support device 80 shown in FIGS. To be supported. The carriage guide shaft support device 80 includes a bearing bush 81, a bearing mounting member 82, a mounting shaft 83, a coil spring 84, and a mounting bracket 85. The bearing bush 81 and the bearing mounting member 82 have a two-body structure. A bearing 79 is formed.
[0069]
As shown in FIG. 12, the carriage guide shaft 26 is provided with the eccentric shaft portions 72 at both ends as described above. The axis 86 of the eccentric shaft portion 72 is set to be eccentric with respect to the axis 87 of the main portion of the carriage guide shaft 26 by an eccentric amount L (described above). Further, a support hole 89 having a tapered surface 90 is formed in the end surface 88 of the eccentric shaft portion 72. The apex 90 </ b> A of the tapered surface 90 is located on the axis 86 of the eccentric shaft portion 72.
[0070]
The bearing mounting member 82 of the bearing 79 is rotatably disposed in the pivot support openings 91 of the left side frame 16 and the right side frame 17 and is made of a flexible material such as a resin. The bearing bush 81 is rotatably and integrally fitted to the inner periphery of the bearing mounting member 82 via a rib 93 described later, and is made of a wear-resistant material such as sintered metal.
[0071]
The eccentric shaft portion 72 of the carriage guide shaft 26 is rotatably inserted into the inner periphery of the bearing bush 81 of the bearing 79 configured as described above. The carriage guide shaft 26 is rotated about the axis 86 of the eccentric shaft portion 72 by the automatic sheet thickness adjusting mechanism 65 with respect to the bearing bush 81 and the bearing mounting member 82 that are integrally formed with the rotation, and the carriage guide shaft 26 is moved relative to the platen 20. The platen gap is adjusted as described above.
[0072]
As shown in FIG. 7, the mounting shaft 83 is elastically supported by a mounting bracket 85 via a coil spring 84, and the mounting bracket 85 is fixed to the left side frame 16. As shown in FIG. 12, the distal end portion 92 of the mounting shaft 83 abuts on the apex 90 </ b> A of the tapered surface 90 of the support hole 89 in the eccentric shaft portion 72 of the carriage guide shaft 26. As a result, the spring force of the coil spring 84 acts as a pressing force on the carriage guide shaft 26 in the axial direction of the carriage guide shaft 26, and the carriage guide shaft 26 is pressed and supported in the axial direction.
[0073]
Next, the bearing 79 will be described in further detail with reference to FIGS.
[0074]
As shown in FIG. 10, the bearing mounting member 82 of the bearing 79 shown in FIGS. 8 and 9 is provided with a locking arm 95 extending integrally from the outer periphery of the cylindrical body portion 94, and this locking arm 95. A claw 96 is projected from the top.
[0075]
The locking arm 95 can be bent and deformed in the direction indicated by the arrow S in FIG. 9 along the axial direction of the body portion 94, that is, the bearing mounting member 82. As shown in FIGS. 7 and 12, the claw 96 is configured such that the bearing mounting member 82 is fitted in the pivotal support openings 91 of the left side frame 16 and the right side frame 17, and the left side frame 16 and the right side frame It can be locked to each groove 98 of the groove row 97 formed in the frame 17.
[0076]
Here, the grooves 98 of the groove row 97 are arranged on an arc locus centering on the axis of the pivot opening 91 in the left side frame 16 and the right side frame 17. Further, the claw 96 is locked to the groove 98 of the groove row 97 by the reaction force of the bending deformation of the locking arm 95.
[0077]
As shown in FIG. 10, the body portion 94 is formed with a notch 99 at a position corresponding to the locking arm 95. Further, the thickness of the body portion 94 is gradually changed from the thickest thickness t1 of the portion where the notch 99 is formed to the thinnest thickness t0 (t1> t0) of the portion facing the notch 99. Is done. Due to the change in the wall thickness, the outer peripheral surface 100 and the inner peripheral surface 101 of the body portion 94 of the bearing mounting member 82 are configured to be eccentric.
[0078]
The point O shown in FIGS. 8 and 12 is the center of the outer peripheral surface 100 of the body portion 94, and the point P is the center of the inner peripheral surface 101 of the body portion 94. The distance between these points O and P is the eccentricity K between the outer peripheral surface 100 and the inner peripheral surface 101 of the trunk portion 94.
[0079]
As shown in FIG. 10, the rib 93 described above is integrally projected on the inner peripheral surface 101 of the body portion 94 of the bearing mounting member 82. As shown in FIG. 12, the rib 93 is positioned substantially at the center in the axial direction of the body portion 94, and the protruding amount thereof is provided uniformly so that it can contact the outer peripheral surface 102 of the cylindrical body 106 of the bearing bush 81. Is done. Further, the entire circumference of the end surface 104 of the body portion 94 of the bearing mounting member 82 is configured to be able to contact the flange portion 105 of the bearing bush 81.
[0080]
On the other hand, as shown in FIG. 11, the bearing bush 81 of the bearing 79 is formed by integrally forming the flange portion 105 on a cylindrical tubular body 106, and a projection 107 is provided on the flange portion 105. The outer peripheral surface 102 and the inner peripheral surface 103 of the cylindrical body 106 are configured concentrically. The protrusion 107 is notched 99 in the body 94 of the bearing mounting member 82 when the cylindrical body 106 of the bearing bush 81 is fitted into the body 94 of the bearing mounting member 82 as shown in FIG. The bearing bush 81 is positioned in the circumferential direction of the body portion 94 of the bearing mounting member 82.
[0081]
As described above, when the cylindrical body 106 of the bearing bush 81 is fitted into the body 94 of the bearing mounting member 82 to form the bearing 79, as shown in FIG. The entire circumference of the end surface 104 abuts on the flange portion 105 of the bearing bush 81, and the rib 93 of the trunk portion 94 contacts the outer circumferential surface 102 of the cylindrical body 106 of the bearing bush 81. Since the outer peripheral surface 102 and the inner peripheral surface 103 of the cylindrical body 106 of the bearing bush 81 are concentric, the entire circumference of the end surface 104 of the body 94 of the bearing mounting member 82 abuts on the flange portion 105 of the bearing bush 81. The direction of the axis 109 of the inner peripheral surface 101 of the body 94 of the bearing mounting member 82 and the direction of the axis 108 of the cylindrical body 106 of the bearing bush 81 are the same so that both (the axis 109 and the axis 108) coincide. .
[0082]
The axis 108 of the cylindrical body 106 of the bearing bush 81 is inserted into the inner peripheral surface 103 of the cylindrical body 106 of the bearing bush 81 so that the eccentric shaft portion 72 of the carriage guide shaft 26 can rotate. It coincides with the axis 86 of the shaft portion 72.
[0083]
As shown in FIGS. 10 and 12, ribs 93 project from the inner peripheral surface 101 of the body 94 of the bearing mounting member 82, and the ribs 93 come into contact with the outer peripheral surface 102 of the cylindrical body 106 of the bearing bush 81. Then, since the bearing bush 81 is fitted into the bearing mounting member 82, the cylindrical body 106 of the bearing bush 81 can be swung by a minute angle with the rib 93 as a fulcrum. Also by this, the axial line 109 of the inner peripheral surface 101 in the trunk portion 94 of the bearing mounting member 82 and the axial line 108 in the cylindrical body 106 of the bearing bush 81 are configured to easily coincide with each other.
[0084]
Further, as shown in FIGS. 9 and 10, since the notch 99 is formed in the body portion 94 of the bearing mounting member 82, the diameter of the body portion 94 can be increased, and the flexibility of the body portion 94 can be achieved. Will increase. For this reason, the cylindrical body 106 of the bearing bush 81 can be slightly moved in the radial direction in the barrel portion 94, so that the axis 109 of the inner peripheral surface 101 in the barrel portion 94 of the bearing mounting member 82 shown in FIG. And the axis 108 in the cylindrical body 106 of the bearing bush 81 are configured to easily match.
[0085]
As described above, when the cylindrical body 106 of the bearing bush 81 is rotationally and integrally fitted in the body 94 of the bearing mounting member 82 to form the bearing 79, as shown in FIG. Since the outer peripheral surface 102 and the inner peripheral surface 103 of the body 106 are concentric, the axial line 108 of the cylindrical body 106 of the bearing bush 81 is connected to the inner peripheral surface 101 of the trunk portion 94 of the bearing mounting member 82 as described above. , And the axis 110 of the outer peripheral surface 100 of the trunk portion 94 of the bearing mounting member 82 (the point O is on the axis 110). Eccentricity is eccentric by K.
[0086]
Therefore, when the bearing mounting member 82 is rotated together with the bearing bush 81 with respect to the left side frame 16 and the right side frame 17, the bearing 79 rotates about the axis 110, and the carriage guide shaft 26 is eccentric. The shaft portion 72 is configured to be eccentric by the eccentric amount K. In other words, when the eccentric shaft portion 72 of the carriage guide shaft 26 is rotatably inserted into the inner peripheral surface 103 of the cylindrical body 106 of the bearing bush 81, when the bearing mounting member 82 of the bearing 79 is rotated, the carriage guide The shaft 26 is brought into contact with and separated from the platen 20 in a state where it does not rotate, and can move a distance that is twice as much as the eccentric amount K of the bearing 79.
[0087]
The bearings 79 positioned on both ends of the carriage guide shaft 26 shown in FIG. 7 are alternately rotated, and the claws 96 of the locking arm 95 of the bearing mounting member 82 are inserted into the groove rows of the left side frame 16 or the right side frame 17. It is locked in the groove 98 of 97. As a result, the carriage guide shaft 26 is moved toward and away from the platen 20 within a range of up to twice the amount of eccentricity K of the bearing 79, adjusted so as to be parallel to the platen 20, and set to the parallel position. The carriage guide shaft 26 is set to the parallel position by the claw 96 of the locking arm 95 being locked to the groove 98 of the groove row 97 by a reaction force when the locking arm 95 is bent and deformed.
[0088]
Therefore, according to the above embodiment, the following effects (1) to (7) are obtained.
[0089]
(1) In the bearing 79, the bearing bush 81 that rotatably supports the eccentric shaft portion 72 of the carriage guide shaft 26 is made of a wear-resistant material. Can be improved.
[0090]
(2) The bearing mounting member 82 of the bearing 79 is made of a flexible material. The bearing mounting member 82 is rotated with respect to the left side frame 16 and the right side frame 17, and the carriage guide shaft 26 is moved to the platen 20. The carriage arm 95 is adjusted in parallel to bend and deform the locking arm 95 of the bearing mounting member 82, and the claw 96 is locked to the groove 98 of the groove row 97 in the left side frame 16 and the right side frame 17. Since the parallelism of the shaft 26 can be set at the position adjusted as described above, the parallelism of the carriage guide shaft 26 can be adjusted and set satisfactorily.
[0091]
(3) Since the bearing mounting member 82 of the bearing 79 is made of a flexible resin, the bearing mounting member 82 is fitted into the pivotal openings 91 of the left side frame 16 and the right side frame 17, and the bearing 79 When attaching to the left side frame 16 and the right side frame 17, it is possible to easily realize a state in which the axis lines 109 and 110 of the bearing attachment member 82 are erected vertically with respect to the left side frame 16 and the right side frame 17. When all the bearings 79 are made of, for example, sintered metal, it is necessary to provide a mounting flange for screwing the bearings 79, but the bearing mounting member 82 in the bearing 79 of the present embodiment has the above-described screwing. Therefore, the mounting space for the bearing 79 can be set small.
[0092]
(4) The bearing 79 is configured such that the outer peripheral surface 100 and the inner peripheral surface 101 of the body portion 94 of the bearing mounting member 82 are eccentric, and are eccentric by an eccentric amount K with respect to the eccentric shaft portion 72 of the carriage guide shaft 26. By rotating the bearing mounting member 82 together with the bearing bush 81 to rotate the bearing 79, the carriage guide shaft 26 can be moved in the direction of contact with and away from the platen 20. Parallelism can be adjusted well.
[0093]
(5) In the bearing 79, the end surface 104 of the bearing mounting member 82 contacts the flange portion 105 of the bearing bush 81, whereby the axis 109 of the inner peripheral surface 101 of the bearing mounting member 82 and the axis 108 of the bearing bush 81 are Therefore, the carriage guide shaft 26 and the bearing bush 81 are not twisted, the rotational load on the carriage guide shaft 26 is reduced, and the carriage guide shaft 26 rotates smoothly. As a result, the detection accuracy when the automatic sheet thickness adjusting mechanism 65 is used is improved.
[0094]
The automatic sheet thickness adjusting mechanism 65 detects the sheet thickness by rotating the carriage guide shaft 26 and measuring that the recording head 18 is in contact with the platen 20 or the sheet by the rotational load of the carriage guide shaft 26. This is a mechanism for adjusting the platen gap between the recording head 18 and the platen 20 by rotating the carriage guide shaft 26 in accordance with the sheet thickness. For this reason, by reducing the rotational load when the carriage guide shaft 26 rotates, the automatic sheet thickness adjusting mechanism 65 makes the recording head 18 come into contact with the platen 20 or the sheet based on the rotational load of the carriage guide shaft 26. The platen gap can be adjusted with high accuracy because the sheet thickness of the sheet can be accurately detected.
[0095]
{Circle around (6)} In the bearing 79, the rib 93 that contacts the outer peripheral surface 102 of the bearing bush 81 is provided on the inner peripheral surface 101 of the bearing mounting member 82. By swinging the bearing bush 81 at a relatively small angle, the axis 109 of the inner peripheral surface 101 of the bearing mounting member 82 and the axis 108 of the bearing bush 81 can be easily aligned. Therefore, the carriage guide shaft 26 and the bearing bush 81 are not twisted, the rotational load on the carriage guide shaft 26 is reduced, and the carriage guide shaft 26 is smoothly rotated. As a result, the detection accuracy when the automatic sheet thickness adjusting mechanism 65 is used is improved.
[0096]
(7) In the bearing 79, since the notch 99 is provided in the body 94 of the bearing mounting member 82 to which the bearing bush 81 can be mounted, the notch 99 provides flexibility that allows the body 94 to be expanded in diameter. Thus, the axis 109 of the inner peripheral surface 101 of the bearing mounting member 82 and the axis 108 of the bearing bush 81 can be easily matched. Therefore, the carriage guide shaft 26 and the bearing bush 81 are not twisted, the rotational load on the carriage guide shaft 26 is reduced, and the carriage guide shaft 26 is smoothly rotated. As a result, the detection accuracy when the automatic sheet thickness adjusting mechanism 65 is used is improved.
[0097]
As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to this.
[0098]
For example, the rib 93 has been described as being formed on the inner peripheral surface 101 of the body 94 of the bearing mounting member 82, but may be formed on the outer peripheral surface 102 of the cylindrical body 106 of the bearing bush 81.
[0099]
Further, the outer peripheral surface 100 and the inner peripheral surface 101 of the trunk portion 94 of the bearing mounting member 82 are eccentric by the eccentric amount K, and the bearing 79 is configured in an eccentric structure. However, the cylindrical body 106 of the bearing bush 81 is described. The outer peripheral surface 102 and the inner peripheral surface 103 in FIG.
[0100]
Further, in the above-described embodiment, the automatic sheet thickness adjusting mechanism 65 rotates the carriage guide shaft 26, but the platen gap adjusting mechanism that manually rotates the carriage guide shaft 26 may be used. Good.
[0101]
【The invention's effect】
According to the carriage guide shaft support device of the recording apparatus according to the first aspect of the present invention, in the carriage guide shaft support device of the recording apparatus including a bearing that pivotally supports the carriage guide shaft on the main body frame, The bearing is rotatably attached to the main body frame and is mounted integrally with a bearing mounting portion made of a flexible material and the bearing mounting portion, and rotatably supports the end portion of the carriage guide shaft. And a bearing bush made of a wear-resistant material, and the bearing is configured to be eccentric with respect to the end portion of the carriage guide shaft, and the bearing mounting portion of the bearing is rotated to bend and deform. Since the parallelism of the carriage guide shaft can be set by engaging with the main body frame, the durability can be improved and the carriage guide can be improved. It can be favorably adjusted to set the parallelism of the axis.
[0102]
According to the recording apparatus of the sixth aspect of the invention, a carriage guide shaft support device provided with a bearing that pivotally supports the carriage guide shaft on the main body frame, and the carriage guide shaft is rotated. A platen gap adjusting mechanism for adjusting a platen gap between a print head and a platen disposed on the carriage guide shaft via a carriage, wherein the bearing in the carriage guide shaft support device includes the main body A bearing mounting portion made of a flexible material that is rotatably mounted on the frame, and is rotatably mounted integrally in the bearing mounting portion, and rotatably supports the end portion of the carriage guide shaft and wear-resistant. A bearing bush made of a conductive material, and the bearing is configured to be eccentric with respect to the end of the carriage guide shaft, The parallelism of the carriage guide shaft can be set by rotating, bending and deforming the bearing mounting portion of the bearing and locking it to the main body frame, so that the durability can be improved and the carriage can be improved. The parallelism of the guide shaft can be adjusted and set well.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a dot impact printer to which an embodiment of a recording apparatus according to the invention is applied.
FIG. 2 is a perspective view of the printer of FIG. 1 with a cut sheet feeder removed.
3 is a perspective view showing a printer main body in the printer of FIG. 1. FIG.
4 is a perspective view showing a sheet conveying mechanism portion of the printer main body of FIG. 3. FIG.
5 is a perspective view of the printer body of FIG. 3 viewed from another angle.
6 is a cross-sectional view taken along line VI-VI in FIG.
7 is an enlarged perspective view showing the carriage guide shaft support device of FIG. 3. FIG.
8 is a front view showing a bearing in the carriage guide shaft support device of FIG. 7;
9 is a perspective view of the bearing of FIG. 8 viewed from the inside.
10 is a perspective view showing a bearing mounting member in the bearing of FIG. 9. FIG.
11 is a perspective view showing a bearing bush in the bearing of FIG.
12 is a cross-sectional view showing a mounting state of the bearing of FIG. 8. FIG.
FIG. 13 is a sectional view of a bearing in a conventional carriage guide shaft support structure.
[Explanation of symbols]
10 Printer (recording device)
16 Left side frame
17 Right side frame
18 Recording head
19 Carriage
20 platen
26 Carriage guide shaft
65 Automatic sheet thickness adjustment mechanism (platen gap adjustment mechanism)
72 Eccentric shaft (end)
79 Bearing
81 Bearing bush
82 Bearing mounting member
93 Ribs of bearing mounting members
94 Body of bearing mounting member
95 Locking arm of bearing mounting member
96 Claws of locking arm
97 Groove row
98 groove
99 Notch in bearing mounting member
100 The outer peripheral surface of the body of the bearing mounting member
101 Inner peripheral surface of the body of the bearing mounting member
102 Outer peripheral surface of cylindrical body of bearing bush
103 Inner peripheral surface of cylindrical body of bearing bush
104 End face of body part of bearing mounting member
105 Bearing bush flange
109 Axis of inner peripheral surface of bearing mounting member
110 Axis of outer peripheral surface of bearing mounting member
K Eccentricity

Claims (10)

In a carriage guide shaft support device of a recording apparatus provided with a bearing that pivotally supports a carriage guide shaft on a main body frame,
The bearing is rotatably attached to the main body frame and is mounted integrally with a bearing mounting portion made of a flexible material and the bearing mounting portion so that the end portion of the carriage guide shaft is rotatable. And supporting bearing bushes made of wear-resistant material,
The bearing is configured to be eccentric with respect to the end portion of the carriage guide shaft. A carriage guide shaft support device for a recording apparatus, characterized in that the degree can be set. 2. The bearing according to claim 1, wherein the outer peripheral surface and the inner peripheral surface of the bearing mounting member or the outer peripheral surface and the inner peripheral surface of the bearing bush are eccentric and are eccentric with respect to an end portion of the carriage guide shaft. 2. A carriage guide shaft support device for a recording apparatus according to 1. 2. The bearing according to claim 1, wherein an end surface of the bearing mounting member abuts against a flange surface of the bearing bush so that the shaft centers of the bearing mounting member and the bearing bush can be aligned. 3. A carriage guide shaft support device for a recording apparatus according to 2. The said bearing WHEREIN: The rib which contact | abuts the other is provided in any one of the internal peripheral surface of a bearing mounting member, and the outer peripheral surface of a bearing bush, The Claim 1 thru | or 3 characterized by the above-mentioned. A carriage guide shaft support device of a recording apparatus. 5. The carriage guide shaft support device for a recording apparatus according to claim 1, wherein the bearing is provided with a notch in a body portion of a bearing mounting member to which a bearing bush can be attached. A carriage guide shaft support device including a bearing that pivotally supports the carriage guide shaft on the main body frame;
A platen gap adjusting mechanism that rotates the carriage guide shaft and adjusts a platen gap between the print head and the platen disposed on the carriage guide shaft via the carriage.
The bearing in the carriage guide shaft support device is rotatably attached to the main body frame, and is mounted integrally with a bearing mounting portion made of a flexible material and in the bearing mounting portion. A bearing bush made of a wear-resistant material and rotatably supporting the end,
The bearing is configured to be eccentric with respect to the end portion of the carriage guide shaft. A recording apparatus characterized in that the degree can be set. The bearing of the carriage guide shaft support device is configured such that the outer peripheral surface and inner peripheral surface of the bearing mounting member or the outer peripheral surface and inner peripheral surface of the bearing bush are eccentric and are eccentric with respect to the end portion of the carriage guide shaft. The recording apparatus according to claim 6. The bearing of the carriage guide shaft support device is configured such that the end surfaces of the bearing mounting member abut against the flange surface of the bearing bush so that the shaft centers of the bearing mounting member and the bearing bush can be aligned. The recording apparatus according to claim 6 or 7. The bearing of the carriage guide shaft support device is characterized in that a rib abutting against the other is provided on one of the inner peripheral surface of the bearing mounting member and the outer peripheral surface of the bearing bush. A recording apparatus according to any one of the above. The recording apparatus according to claim 6, wherein the bearing of the carriage guide shaft support device is provided with a notch in a body portion of a bearing mounting member to which a bearing bush can be attached.

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