JP2599828B2 - Rotary shaft support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating shaft supporting device, such as a printer, for supporting a rotating shaft of a rotating component such as a paper guide or a rubber roller.

[0002]

2. Description of the Related Art FIG. 5 is a perspective view showing a part of a conventional printer similar to that shown in, for example, Japanese Patent Application Laid-Open No. 2-136261. In the figure, two side plates 1 facing each other are provided in a paper transport path in a printer.
These side plates 1 are fixed to both ends of the connection member 3 by screws 4.

A paper guide 5 having a circular cross section and extending in the paper width direction is rotatably provided between the two side plates 1. Rotation shafts 5a protrude from both ends of the paper guide 5, respectively. These rotating shafts 5a are
Each of the side plates 1 is rotatably inserted into a hole 1a. In such a printer, a paper guide 5 is usually used.
Is fixed in a state as shown in the figure, whereby a sheet (not shown) is guided and conveyed. Also, when paper jams occur, to remove jammed paper,
The paper guide 5 is rotated and opened. Next, FIG. 6 is a perspective view showing an example of a conventional roller shaft support device. In the drawing, a linear cutout 1b and a circular cutout 1c following the cutout 1b are provided at the end of the side plate 1. A bearing member 7 into which the shaft 6a of the roller 6 is inserted is mounted in these notches 1b and 1c. Bearing member 7
Has a cylindrical portion 7a that penetrates the notches 1b and 1c and into which the shaft 6a is inserted, and a flange portion 7b that contacts the outer surface of the side plate 1. A pair of parallel flat portions 7c is provided on the outer peripheral surface of the cylindrical portion 7a. Bearing member 7 as described above
Is mounted on the side plate 1 by dropping it from the linear notch 1b into the circular notch 1c in such a direction that the flat portion 7c is parallel to the linear notch 1b, and then rotating it by 90 °.

[0004]

Among the conventional printers configured as described above, in the printer of FIG. 5, when the paper guide 5 is removed from the side plate 1 for maintenance or replacement, the screw 4 is removed. Therefore, when it is necessary to remove one side plate 1 from the connecting member 3, and when another component is attached between the two side plates 1, by removing the side plate 1 from the connecting member 3, these components are removed. The paper guide 5 has to be removed, and the removal and reattachment of the paper guide 5 is very troublesome. In the case of FIG. 6, if the length of the linear notch 1 b is long, the strength of the side plate 1 is reduced. Therefore, the mounting position of the bearing member 7 has to be located near the end of the side plate 1. There was a problem that the mounting position was restricted.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and it is an object of the present invention to easily attach / detach a rotating shaft to / from a side plate and reduce the strength of the side plate. It is an object of the present invention to obtain a rotating shaft support device that can arbitrarily select the position of the rotating shaft without any need.

[0006]

A rotating shaft supporting device according to the present invention allows a holder to be attached to and detached from a side plate provided with a holder hole, with a front end portion projecting from the side plate through the holder hole. And a rotating shaft is rotatably inserted into the tip of the holder.

[0007]

In the present invention, by attaching and detaching the side plate and the holder of another component to and from the side plate, the rotating shaft can be attached to and detached from the side plate without removing the entire side plate.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a perspective view showing a paper guide supporting device of a printer according to an embodiment of the present invention.

In the drawing, two side plates 11 facing each other are provided in a paper transport path in a printer. These side plates 11 are fixed in the printer by screws or the like as in the conventional example. Each side plate 11 has a holder hole 11
a, and these holder holes 11a are opposed to each other. A substantially cylindrical holder 14 penetrates each holder hole 11a. Each holder 14 is detachably attached to the side plate 11.

A paper guide 15 extending in the width direction of the paper and having an arcuate cross section is rotatably supported between the two side plates 11. Rotation shafts 15a protrude from both ends of the paper guide 15, respectively. These rotating shafts 15a are
It is inserted into the tip of a holder 14 that penetrates each side plate 11 and protrudes from the inner surface of each side plate 11, and is held rotatably.

Next, FIG. 2 is an exploded perspective view showing one support portion of the paper guide 15 of FIG. 1 in an enlarged manner, and FIG. 3 is a front view when the holder 14 of FIG. 2 is inserted into the holder hole 11a. ,
The other side is similar. In the figure, a first linearly extending peripheral edge of the holder hole 11a on the outer surface of the side plate 11 is provided.
And a second projection 11c having an L-shaped cross section and having a tip bent toward the inner diameter side of the holder hole 11a are erected at an interval from each other.

At the rear end of the holder 14 in the insertion direction, a flange 14a having a larger diameter than the front end is provided, and a recess 14b adjacent to the flange 14a is provided. As shown in FIG. 3, when the holder 14 is inserted into the holder hole 11a, the concave portion 14b serves as a relief for the distal end of the second protrusion 11c. The flange portion 14a extends in the axial direction of the
An abutting portion 14c is provided for abutting against the side surface of the tip of the projection 11c.

At a position substantially opposite to the concave portion 14b at the rear end of the holder 14, there is provided a flexible arm 14d extending along the circumferential direction of the holder 14 and elastically deformable in the radial direction of the holder 14. ing. A holder is provided at the tip of the flexible arm 14d.
An engaging protrusion 14e protruding outward in the radial direction of 14 is provided, and a flexible arm operating protrusion extending in the axial direction of the holder 14.
14f is provided. Also, at the rear end of the holder 14,
An operation projection 14g for rotating operation is also provided.

In the paper guide supporting device of the printer constructed as described above, as shown in FIG.
Is inserted into the holder hole 11a, and the paper guide 15a is inserted into the tip of the holder hole 11a. Then, the holder 14 is rotated in the direction of arrow A in FIG. At this time, the flexible arm 14d is deformed toward the inner diameter side of the holder 14 by contacting the first protrusion 11b. Then, the engagement projection 14e is moved to the first projection 11
After passing through b, the flexible arm 14d is restored. At the same time, the contact portion 14c contacts the side surface of the tip of the second protrusion 11c, and the mounting of the holder 14 is completed as shown in FIG.

At this time, the flange 14a is connected to the second protrusion.
The holder 14 is sandwiched between the front end portion of the holder 11c and the side plate 11, thereby acting as a stopper for the holder 14 in the axial direction. Also, the contact part
14c functions as a stopper in the direction of rotation when the holder 14 is mounted, that is, in the direction of arrow A by abutting on the second protrusion 11c. further. The restored engagement projection 14e functions as a stopper in the rotation direction when the holder 14 is removed, that is, in the direction opposite to the arrow A, by engaging with the first projection 11b. Accordingly, the holder 14 is held by the side plate 11 while being inserted into the holder hole 11a. Thus, the paper guide
By attaching the holders 14 to both ends of the paper guide 15, the paper guide 15 is rotatably supported between the two side plates 11.

On the other hand, when removing the paper guide 15, the flexible arm 14d is pressed by pressing the flexible arm operation protrusion 14f.
It is forcibly deformed to the inner diameter side of 14, and the engagement of the engagement projection 14e with the first projection 11b is released. In this state, the holder 14
Is rotated in the direction opposite to the arrow A in the figure. When the holder 14 rotates to the position shown in FIG. 3, the holder 14 is pulled out from the holder hole 11a. As a result, since the rotating shaft 15a comes off the holder 14, the paper guide 15 can be removed from between the side plates 11 by removing both holders 14.

In such a paper guide supporting device,
The paper guide 15 can be attached and detached without removing the side plate 11 from the printer. Therefore, even when another shaft component is mounted between the side plates 11, there is no need to remove these other components, and the paper guide 15 can be easily attached to and detached from the side plates. In addition, since the side plate 11 may be provided with the holder hole 11a regardless of the position of the paper guide 15, the position of the paper guide 15 can be arbitrarily selected without the strength of the side plate 11 being reduced by the position of the paper guide 15. it can. In the above embodiment, since the operation projection 14g is provided, the holder
While the turning operation of 14 is easy, when the holder 14 is removed, it acts as a stopper in the direction opposite to the arrow A,
The recess 14b can be easily matched with the position of the second protrusion 11c. Further, in the above embodiment, the holder
Since no tools are required for attaching and detaching the rotary shaft 15a, attaching and detaching the rotating shaft 15a is easier.

In the above embodiment, the paper guide 15 is used as the rotary shaft 15a. However, the present invention is not limited to this. For example, the rotary shafts of various rollers of a printer and the so-called shaft May be the rotation axis.
In addition, the shape of the holder 14 is not limited to the above-described embodiment, and the method of attaching to and detaching from the side plate 11 is not particularly limited. Further, in the above-described embodiment, the both ends of the paper guide 15 have the same configuration. However, the holder 14 may be provided only on one side, and the other may be simply an insertion hole or may be connected to a rotary drive system.

[0019]

As described above, the rotating shaft supporting device of the present invention allows the holder to be attached to and detached from the side plate provided with the holder hole by inserting the tip into the holder hole and rotating. So that the rotating shaft is rotatably inserted into the tip of the holder, so that only the side plate and the holder of another part are attached to and detached from the side plate, without removing the entire side plate, Thus, the rotating shaft can be easily attached and detached, and the position of the rotating shaft can be arbitrarily selected without reducing the strength of the side plate. Further, when removing the holder, the stopper can be released only by deforming the flexible arm inward in the radial direction, and the operation is easy, and the deformation amount of the flexible arm is restricted by the main body of the holder. Therefore, the flexible arm does not break due to excessive deformation. In addition, since the tip of the holder is axially inserted into the circular holder hole, the holder is firmly held in the holder hole, and the holder can be rotated stably at the time of attachment and detachment. improves.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a paper guide supporting device of a printer according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing one rotation shaft support portion of FIG.

FIG. 3 is a front view showing a state where the holder of FIG. 1 is simply inserted into a holder hole.

FIG. 4 is a perspective view showing a state in which the holder of FIG. 1 is mounted on a side plate.

FIG. 5 is a perspective view showing a conventional example.

FIG. 6 is a perspective view showing an example of a conventional roller shaft support device.

[Explanation of symbols]

 11 Side plate 11a Holder hole 14 Holder 15a Rotating shaft

Continuation of front page (56) References JP-A-61-270509 (JP, A) JP-A-4-62923 (JP, U) JP-A-63-109029 (JP, U) JP-A-49-53138 (JP) , U) Japanese Utility Model Showa 61-24525 (JP, U) Japanese Utility Model Utility Model 1-89623 (JP, U)

Claims (1)

(57) [Claims] 1. A rotating shaft supporting device for rotatably supporting a rotating shaft, wherein a side plate provided with a circular holder hole and a tip portion are inserted into the holder hole and rotated. , While being detachably attached to the side plate,
A holder in which the rotating shaft is rotatably inserted at the distal end, a projection is provided near the holder hole of the side plate, and an outer peripheral portion of the holder is provided on the side plate. A flexible arm extending in the circumferential direction, which is pressed by the protrusion with the rotation of the holder when the holder is attached and elastically deforms radially inward, is provided at a distal end of the flexible arm. A rotating shaft support device, comprising: an engaging projection protruding radially outward so as to engage with the projection when the flexible arm has passed through the projection.