JPH089448Y2 - Elastic bearing structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to enhancement of elastic support force and improvement of stability of a bearing structure having spring elasticity.

Elastic bearings, in which the rotating shaft can be attached and detached in the radial direction of the rotating shaft, are very widely used as bearings for shafts that support wound recording paper of printers because the rotating shaft can be attached and detached very easily.

[Prior Art] FIG. 6 is a perspective view for explaining a conventional structure of an elastic bearing structure. In the drawing, reference numeral 1 is a long recording paper, and 2 is a cylindrical shape in which the recording paper 1 is wound in multiple layers. Of the core 3, a rotary shaft penetrating the core 2 and fitted with the core 2 is a pair of elastic bearings 4 rotatably supporting the ends of the rotary shaft 3, and 5 is a substantially U-shape in a side view. It is a base plate for mounting the elastic bearing 4 formed on the.

Elastic bearing 4 formed by pressing a metal plate having a spring property or molding a plastic having a spring property
Has a U-shape in a side view in which a pair of elastic pieces stands upright from the bottom, and is bent so as to sandwich the shaft neck portion of the rotary shaft 3 at the intermediate portion of the elastic pieces.

The elastic bearing 4 supports the rotating shaft 3 by pushing the shaft neck portion from above the opening that opens in a tapered shape, and when the winding end of the recording paper 1 is pulled in the opposite direction to the winding direction, the shaft 3 rotates. Then, the recording paper 1 is fed out. Next, when all of the recording paper 1 is fed out, the rotary shaft 3 is removed by pulling it up.

[Problems to be solved by the invention]

In the conventional elastic bearing configured as described above, the elastic piece that supports the rotating shaft has a simple cantilever structure, and the rotating shaft is resistant to load fluctuations of the rotating shaft that occur when the recording paper is started and stopped. In order to increase the clamping force of the elastic piece for stable support, it is necessary to increase the cross-sectional area of the elastic piece.

However, if the cross-sectional area of the elastic piece is increased, a large force is required to attach / detach the rotating shaft, which lowers the operability of the attaching / detaching work and may damage the elastic bearing.

[Means for solving problems]

The above problem is that the other end surface of the pair of plate-shaped bearing members having spring elasticity in which one end portion is fixed and a bearing surface for rotatably supporting the shaft neck of the rotary shaft is formed in the middle portion is less. The pair of bearing members are configured so that when the shaft neck is fitted into the bearing portion, the shaft head contacts each of the pair of fixing members, and the contact surface presses the shaft neck with an appropriate pressing force by the contact. And the pair of bearing members and the pair of fixing members are integrally formed, and the bearing member and the fixing member are molded of plastic. The composite part is formed by integrally forming the pair of bearing members and the pair of fixing members located outside thereof into a plate-shaped composite part having a thickness in the length direction of the rotating shaft. The pair of fixings to the supporting member that supports the Wherein the groove that the outer portion is insert fitting of wood is formed, it is solved by the elastic bearing structure of the present invention.

[Action]

According to the above means, since the other end of the bearing member whose one end is fixed is brought into contact with the fixed member when the rotary shaft is fitted and inserted, the rotary shaft is supported with a large force. Therefore, a strong supporting force of the rotating shaft is ensured, and the attaching and detaching of the rotating shaft is easy because the supporting force is large, and the contact of the rotating shaft prevents the elastic piece from being damaged.

If the contact occurs during the fitting and insertion, the attachment / detachment becomes easier.

〔Example〕

Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a perspective view in which a pair of elastic bearings according to an embodiment of the present invention is mounted, FIG. 2 is a side view in which a rotary shaft is inserted into the elastic bearings, and FIG. 3 is a process of inserting the rotary shaft. 4 is a side view for explaining the structure of the elastic bearing according to another embodiment of the present invention and a perspective view showing the mounting state thereof, and FIG. 5 is a perspective view for explaining the mounting method. is there.

In FIG. 1 configured to support the rotary shaft 3 described above, 11 is an elastic bearing formed by molding plastic, and 12 is a base plate on which a pair of opposing elastic bearings 11 are mounted. The pair of fixing members 14 is arranged upright on the outside of the pair of bearing members 13 facing each other. Bearing member 13 having spring elasticity with physical properties of plastic and appropriate thickness 13
Is a cylindrical bearing surface that supports the shaft of the rotary shaft 3 in the middle.
15 is formed, and its tip is separated from the fixing member 14 when the rotating shaft 3 is not supported.

The cylindrical center line of each bearing surface 15 is common, and when the shaft neck of the rotary shaft 3 is fitted therein, the tip of each bearing member 13 is formed thick as shown in FIG. Fixing member 14
The rotary shaft 3 is supported by the pressing force generated by the elastic deformation of the bearing member 13 due to the contact.

FIG. 3A is a side view in which the rotary shaft 3 is to be inserted into the elastic bearing 11, and FIG. 3B is a side view showing a state in which the rotary shaft 3 is being inserted. When 3 is pushed in, its shaft abuts the tapered opening piece 16 of the elastic bearing 11 in the middle of pushing in and elastically deforms the elastic bearing 11 so that the tip of the opening piece 16 abuts the fixing member 14.

Therefore, if the pushing is continued, the elastic deformation of the elastic bearing 11 is further increased and becomes maximum when the boundary portion between the bearing surface 15 and the opening piece 16 is positioned right next to the shaft neck, and the shaft neck is fitted into the bearing surface 15. When combined, the elastic deformation causes the shaft to be supported by an elastic pressing force, although the elastic deformation returns slightly.

In FIG. 4, 21 is an elastic bearing (composite component) in which a pair of bearing members 23 (corresponding to the above-mentioned bearing member 13) and a fixing member 24 (corresponding to the above-mentioned fixing member 14) are integrally formed, Reference numeral 22 is a support member (for example, a part of the casing of the printer) into which the elastic bearing 21 is inserted.

In FIG. 5, an elastic bearing 21 formed in a plate shape having a thickness in the length direction of a rotary shaft for molding and supporting plastic is a pair of elastic members having spring elasticity due to the physical properties of the plastic and an appropriate width. The lower end of 23 is a pair of fixing members
The upper end of the fixing member 24 is formed so as to surround the upper end of the bearing member 23 halfway.

The bearing member 23 has a bearing surface 27 in the middle and an opening piece 28 projecting obliquely upward from the upper end thereof, and the fixing member 24 has a projection 25 projecting outward and a projection projecting outward from the tip of the elastic piece. 26 are formed respectively.

On the other hand, the support member 22 including the horizontal portion 31 and the upright portion 32,
A pair of L-shaped projections 32 having a cross-section project downward from the upright portion 32, and a through hole 33 is formed in the horizontal portion 31.

Therefore, when the elastic bearing 21 is inserted between the opposed protrusions 32,
The protrusion 25 engages with the protrusion 32, and when the protrusion 26 and the lower portion of the connecting portion 29 are fitted into the through hole 33, the protrusion 26 engages with the end of the through hole 33.

The elastic bearing 21 can support and remove the rotating shaft 3 similarly to the elastic bearing 11 shown in FIG. 1, and can be easily attached to and detached from the support member 22. Damaged or elastic bearings with different shaft diameters (2
It will be easy to replace it in 1).

The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the present invention can be realized by forming a bearing member with a metal having a spring property and mounting it on a fixing member made of plastic. Add note.

[Effect of device]

As described above, according to the present invention, the supporting force of the rotary shaft increases, and the rotary shaft can be easily attached and detached regardless of the increase.
Therefore, for example, when it is applied to a rolled recording paper storage unit of a printer, the recording paper is smoothly fed out, and the printing quality is improved.

[Brief description of drawings]

FIG. 1 is a perspective view in which a pair of elastic bearings according to an embodiment of the present invention are mounted, FIG. 2 is a side view in which a rotating shaft is fitted in the elastic bearing, and FIG. 3 is a rotating shaft in the elastic bearing. FIG. 4 is a side view for explaining a fitting process, FIG. 4 is a perspective view showing a structure and a mounting state of an elastic bearing according to another embodiment of the present invention, and FIG. 5 is a view for explaining the mounting. FIG. 6 is a perspective view, and FIG. 6 is a perspective view for explaining the conventional configuration of the elastic bearing structure. In the figure, 1 is a rotating shaft, 4, 11 and 21 are elastic bearings, 13 and 23 are bearing members, 1
4, 24 are fixing members, 15, 27 are bearing surfaces, and 32 are elastic bearing fitting projections (grooves).

Continued Front Page (72) Inventor Tomio Matsumoto 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Within Fujitsu Limited (56) References U) Actual development Sho 58-106615 (JP, U)

Claims (4)

[Scope of utility model registration request] 1. A pair of plate-shaped bearing members having a spring elasticity in which one end is fixed and a bearing surface for rotatably supporting a shaft neck of a rotary shaft is formed in an intermediate portion, and the other end surface is at least the other. The pair of bearing members are configured so that when the shaft is fitted into the bearing portion, the shaft contacts the pair of fixing members, and the bearing surface presses the shaft with an appropriate pressing force by the contact. An elastic bearing structure characterized by being configured so as to face each other. 2. The elastic bearing structure according to claim 1, wherein the pair of bearing members and the pair of fixing members are integrally formed. 3. The elastic bearing structure according to claim 2, wherein the bearing member and the fixing member are formed by molding plastic. 4. The pair of bearing members and the pair of fixing members located outside thereof are integrally formed into a plate-shaped composite component having a thickness in the length direction of the rotating shaft. The elastic bearing structure according to claim 2, wherein the supporting member for supporting is formed with a groove into which the outer side portions of the pair of fixing members are inserted.