JPH01131323A - Thrust regulating means for square shaft body - Google Patents

Abstract

PURPOSE:To facilitate the thrust regulation of a square shaft body on whose upper surface a hole is punched by inserting it, in a square hole of a fitting member having an integrally formed movable cut piece provided with a projection, engagedly fixing the projection to the hole, and journaling the fitting member to a bearing member. CONSTITUTION:A hole 10a is punched through the surface of a square shaft body 10 which is inserted in a square hole 13c of a fitting member 13, on which a movable cut piece 13d is integrally formed. A projection 13a formed on the movable cut piece 13d is slid on the surface of the shaft body 10 in accordance with the inserting movement due to elasticity, and engagedly fixed in the hole 10a of the shaft body 10. The cylindrical outer circumferential part of the fitting member 13 is journalled the cylindrical inner circumferential part of a bearing member 12. A rotational sliding generated between the fitting member 13 and the shaft body 10 is, therefore, regulated by the square hole, the axial thrust in the axial direction of both members is also regulated by the engagement of the projection 13a with the hole 10a. The assembling is simplified because it is unnecessary to additionally provide a thrust regulating member.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a regulating means for regulating the mutual movement of a prismatic shaft body and a fitting member fitted onto the shaft body in the longitudinal direction of the shaft body.

[Conventional technology]

Conventionally, a thrust regulating member such as an E-ring has been used to restrict the mutual movement of a prismatic shaft and a fitting member fitted onto the shaft in the longitudinal direction of the shaft. What is shown in FIGS. 4a and 4b is a conventional thrust regulating means. In these figures, l is a prismatic shaft, 2
3 is an E-ring, 3 is a fitting member, 4 is a bearing member, and 5 is a shaft support surface. A hole for an E-ring 2 is bored in the shaft surface of the long prismatic shaft 1, and the E-ring 2 is attached to the prismatic shaft 1. The fitting member 3 has a square hole into which the prismatic shaft 1 is inserted. The fitting member 3 has a cylindrical outer shape and is supported by a bearing member, which will be described later. The bearing member 4 is a bearing that is fixed to the shaft support surface 5 and pivotally supports the prismatic shaft l through the fitting member 3. With this configuration, the fitting member 3 supports the prismatic shaft l by inserting it into its square hole.
is regulated with respect to the rotational direction of the shaft body l, and mutual slippage in the rotational direction between both members does not occur. Further, since the E-ring 2 is attached to the prismatic shaft l, mutual movement of the prismatic shaft l and the fitting member 3 in the longitudinal direction of the shaft is also restricted.

[Problems to be solved by the invention]

However, according to the above-mentioned conventional thrust regulation means,
First, a thrust regulating member, such as an E-ring, is required to regulate the mutual movement of the prismatic shaft and its fitting member in the longitudinal direction of the shaft. Further, a special tool was required to assemble the thrust regulating member, and the assembly required many man-hours, making the assembly inefficient.

[Means to solve the problem]

The present invention solves the above problems and aims to realize a thrust regulating means for a prismatic shaft body that is simple, easy to assemble, and inexpensive. The above object integrally includes a prismatic shaft having a hole bored on its surface, a square hole into which the shaft is inserted, and a movable section having a protrusion that is attached to the hole. a fitting member and a bearing member that pivotally supports the fitting member, the prismatic shaft body is pivotally supported by the bearing member via the fitting member, and the protrusion is engaged with the hole portion. This is achieved by a thrust regulating means for a prismatic shaft body, which is configured to restrict mutual movement of the prismatic shaft body and the fitting member in the longitudinal direction of the shaft body.

【Example】

Embodiments of the invention are illustrated in FIGS. 1-3. FIG. 1 is an exploded perspective view of each related member showing the above embodiment. FIG. 2 is a sectional view of the above-mentioned members assembled together. In these figures, 10 is a prismatic shaft body, lOa is a hole drilled on the shaft surface of the prismatic shaft body 10, and 11 is a prismatic shaft body lOa through a bearing member and a fitting member, which will be described later. 12 is a bearing member, 13 is a fitting member, 13
A is a protrusion provided on a movable section that is integral with the fitting member 13. The prismatic shaft lO is formed by bending a metal plate having a thickness l ma+ into a U-shape. A hole 10a is bored on the shaft surface of the prismatic shaft lO. The shaft support surface 11 is provided with an oval-shaped hole 11a into which a bearing member 12, which will be described later, is inserted and fixed. The bearing member 12 has a hollow cylindrical shape. It has notches 12a on both sides of its outer peripheral surface, has an oval-shaped cross section, and is inserted into the oval-shaped hole 11a. Further, a fitting member 13, which will be described later, is pivotally supported on the inner peripheral portion 12b of the bearing member 12. The fitting member 13 is made of synthetic resin. The fitting member 13 has a square hole 13c into which the prismatic shaft 10 is inserted, and a protrusion 13a which is engaged with the hole 10a of the prismatic shaft 10. It is set in. The outer shape of the fitting member 13 is cylindrical, and the outer circumferential portion 13b
is pivotally supported by the inner peripheral portion 12b of the bearing member 12. With this configuration, since the fitting member 13 supports the prismatic shaft 10 by inserting it into its square hole 13c, the fitting member 13 does not restrict the direction of rotation of the shaft IO. Therefore, mutual slippage in the rotational direction between both members does not occur. Further, since the protrusion 13a of the fitting member 13 is engaged with the hole 13a of the prismatic shaft lO, the prismatic shaft IO and the fitting member 13 move relative to each other in the longitudinal direction of the shaft. is also regulated. In this embodiment, the fitting member 13 is made of synthetic resin, but the movable section 13d has elasticity.
The protrusion 13a moves elastically to open the hole 10a.
The material of the fitting member 13 is not limited to synthetic resin if it is attached and detached. Further, in this embodiment, the fitting member 13 is a sliding member of the prismatic shaft lO that is pivotally supported by the bearing member 12, but is not limited to this. For example, a gear, a roller, etc. This method is extremely effective as a thrust fixing method of a fitting member to a columnar shaft when the shaft is used as a rotation shaft. FIG. 3 is a perspective view showing another embodiment of the thrust regulating means. In the figure, 15 is a gear, 15b is a movable section provided integrally with the gear 15, and 15a is a movable section 15.
16 is a roller, 16b is a movable section provided integrally with the roller 16, and 16a is a protrusion provided on the movable section 16b. In addition, Figures 1 and 2
Components that are the same as those in the figures are designated by the same reference numerals. The gear 15 serving as a fitting member is pivotally supported by a bearing member 12, and a protrusion 15a protruding from a movable section 15b of the gear 15 is engaged with a hole in the prismatic shaft body 10. Since the bearing member 12 is fixed to the shaft support surface 11, the gear 15 and the prismatic shaft body 1
0 means that their mutual movement in the thrust direction is regulated, and that they share the same rotation center and are pivotally supported by the bearing member 12 of the shaft support surface 11, so that they can rotate integrally. It is composed of In the roller 16 as a fitting member, a protrusion 16a protruding from a movable section 16b integrally provided on the roller 16 is engaged with a hole in the prismatic shaft lO. The roller 16 and the prismatic shaft body IO are configured so that their movement in the thrust direction is restricted, and they share the same rotation center and can rotate together.

【Effect of the invention】

According to the present invention, the regulating means for regulating the mutual movement of the prismatic shaft body and the fitting member fitted into the shaft body in the longitudinal direction of the shaft body is provided by a movable section integrally provided on the fitting member. Since the upper protrusion is engaged with the hole of the prismatic shaft body to regulate the thrust, there is no need to provide a separate thrust regulating member, and no special tools are required for assembly, making assembly easy. It has become possible to realize a thrust regulating means of a prismatic shaft body that is easy and inexpensive. Further, the present invention can be applied to, for example, the shaft of a recording paper conveyance section of a recording apparatus, or other rotating parts that do not require a large load or driving force, and can bring about great effects.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing one embodiment of the present invention, Fig. 2 is a sectional view of the above embodiment, Fig. 3 is a perspective view showing another embodiment, and Figs. 4a and 4b are conventional FIG. 3 is an explanatory diagram showing a thrust regulating means.

Claims (1)

[Claims] A fitting member that integrally includes a prismatic shaft having a hole bored on its surface, a square hole into which the shaft is inserted, and a movable section having a protrusion that is engaged with the hole. and a bearing member that pivotally supports the fitting member, the prismatic shaft is pivotally supported by the bearing member via the fitting member, and the protrusion is engaged with the hole, A thrust regulating means for a prismatic shaft body, characterized in that the prismatic shaft body is configured to restrict mutual movement of the prismatic shaft body and the fitting member in the longitudinal direction of the shaft body.