JPH072192Y2 - Resin bushings for resin rollers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a resin-made resin roller used for a sheet-conveying resin roller that conveys a film or copy paper in an automatic developing machine, a copying machine, a facsimile, a printer, or the like. Bushing improvements.

[Conventional technology]

Generally, in automatic developing machines, copying machines, facsimiles, printers, etc., resin rollers are used to carry films and copying paper.

This type of resin roller is composed of a pipe-shaped resin roller body and a drive shaft that transmits rotation. The material of the resin roller body is made of FRP, phenol-based, acrylic-based resin, etc. , Or a metal pipe, for example, a stainless steel pipe as a core material, and a phenolic resin
Pipes coated with ABS resin, fluorine resin, urethane resin, vinyl chloride resin, rubber, etc. are used.

On the other hand, as a material of the drive shaft, a metal such as iron, stainless steel, or aluminum is used, or a shaft made of, for example, stainless steel is insert-formed in a bushing made of ABS resin.

However, since the resin roller is used at a high temperature or a low temperature, there is a problem that the adhesive portion between the pipe-shaped resin roller main body and the drive shaft peels off.

[Problems to be solved by the device]

The present invention has been made to solve the above-mentioned problems, and its purpose is to reduce the adhesive strength between the pipe-shaped resin roller body and the drive shaft during use, and An object of the present invention is to provide an inexpensive resin bushing for a resin roller that does not cause peeling or the like.

[Means for Solving the Problems]

Thus, the above-mentioned object is to form a roller coupling part which is fitted and adhered to the inner wall surface of the cylindrical resin roller body for paper sheet conveyance at one end, and the drive shaft is inserted and coupled to the other end. In a resin bushing for a resin roller to be formed, it is achieved by forming an adhesive reservoir on the outer peripheral surface of the roller coupling portion.

Examples of the synthetic resin material that is the material of the bushing include reinforced polypropylene, nylon 6, nylon 66,
Thermoplastic resins such as nylon MXD6, polycarbonate, polybutylene terephthalate, polyacetal, modified polyphenylene oxide, polyphenylene sulfide, aromatic polysulfone, aromatic polyester, aromatic polyimide, aromatic polyamideimide, polyetherimide, polyetheretherketone, Further, thermosetting resins such as phenolic resins, melamine resins, epoxy resins, diallyl phthalate resins and the like can be mentioned. To increase the strength, for example, glass fiber, carbon fiber, aramid fiber, cellulose fiber, ceramic fiber , Fiber wool such as rock wool and asbestos, and non-fiber reinforcement such as talc, mica, wollastonite and clay.

[Action]

By configuring as described above, the weight of the roller as a whole can be reduced, and the adhesive strength between the resin roller main body and the drive shaft does not decrease during use, and the adhesive portion does not peel off. It can be manufactured at low cost.

〔Example〕

 Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is an axial sectional view showing an embodiment of a resin bushing for a resin roller according to the present invention, FIG. 2 is a front view in the direction A in FIG. 1, and FIG. 3 is shown in FIG. FIG. 4 is a partially enlarged sectional view of a resin bushing, and FIGS. 4 to 8 are partially enlarged sectional views showing different embodiments of the resin bushing according to the present invention.

In addition, Table 1 shows the test results of the types of synthetic resins used in the production of the resin bushings of Examples 1 to 7 and Comparative Examples 1 to 4, the presence / absence of a reinforcing material, injection molding conditions, and tensile strength and adhesive torque. Is.

1 to 3, 1 is a drive shaft, 2 is a resin bushing according to the present invention, 2a and 2a are adhesive reservoirs, and 3 is a pipe-shaped resin roller body.

Further, in FIGS. 4 to 8, 4, 5, 6, 7 and 8 are resin bushings according to the present invention, 4a, 5a, 6a, 7a and 8a.
Is an adhesive reservoir.

Examples 1 to 1 of the resin bushing thus manufactured
7 was bonded to a resin roller body made of a phenol pipe with an epoxy adhesive (made by Araldite “Standard” Ciba Geigy), and the adhesive strength was measured at 23 ° C. by a tensile tester.

In addition, cold cycles from -20 ° C to + 60 ° C were repeated 100 cycles, and the adhesive strength was measured using a torque meter.

The measured data are shown in Table 1 in comparison with comparative examples 1 to 4 in which the adhesive agent reservoir is not provided.

The adhesive reservoir may be circular holes 4a, 4a as shown in FIG. 4, or a plurality of grooves having a rectangular cross section as shown in FIG.
It may be 5a or 5a. Further, the adhesive reservoir may be a single annular groove 6a formed in the circumferential direction as shown in FIG. 6, or a plurality of annular grooves 7a in the circumferential direction as shown in FIG.
7a may be formed, or a spiral groove 8a may be formed as shown in FIG.

[Effect of device]

As can be seen from the above-mentioned examples and the test results, the present invention can reduce the weight because the roller body and bushing are made of resin, the adhesive strength is less deteriorated, the dimensional accuracy is good, and the cutting process is good. Since it does not require, it is extremely economical.

The present invention is not limited to the above embodiment, and for example, the adhesive reservoir formed on the outer peripheral surface of the roller coupling portion of the resin bushing can store the adhesive,
Further, other shapes may be used as long as they can surely connect the pipe-shaped roller body and the drive shaft to each other. It includes an example.

[Brief description of drawings]

FIG. 1 is an axial sectional view showing an embodiment of a resin bushing for a resin roller according to the present invention, FIG. 2 is a front view in the direction A in FIG. 1, and FIG. 3 is shown in FIG. FIG. 4 is a partially enlarged sectional view of a resin bushing, and FIGS. 4 to 8 are partially enlarged sectional views showing different embodiments of the resin bushing according to the present invention. 1 …… Drive shaft 2 …… Resin bushing 2a …… Adhesive reservoir 3 …… Resin roller body 4,5,6,7,8 …… Resin bushing 4a, 5a, 6a, 7a, 8a …… Adhesion Agent pool

Claims (5)

[Scope of utility model registration request] 1. A roller coupling portion which is fitted and adhered to an inner wall surface of a cylindrical resin roller body for paper transport (3) is formed at one end, and a drive shaft (1) is inserted at the other end. , In the resin bushing (2,4,5,6,7,8) for the resin roller to be joined, the adhesive pool (2a, 4a, 5a, 6a,
7a, 8a) is formed, the above-mentioned resin bushing. 2. The resin bushing according to claim 1, wherein the adhesive reservoir is at least one groove (2a, 5a) formed in the axial direction. 3. The resin bushing according to claim 1, wherein the adhesive reservoir is a circular hole (4a). 4. The resin bushing according to claim 1, wherein the adhesive reservoir is at least one annular groove (6a, 7a) formed in the circumferential direction. 5. The groove (8a) in which the adhesive reservoir has a spiral shape.
The resin bushing according to claim 1, which is a utility model registration claim.