JP3057747U - Resin wheel and pulley with shield plate - Google Patents

Abstract

(57) [Problem] To provide a resin-made wheel and a pulley with a shield plate that are less likely to cause rotational irregularities and can improve the life. A plurality of balls (16) are arranged between an outer ring (14) and an inner ring (12) made of synthetic resin, and a stepped recess (22) is formed in the inner periphery on both sides of the outer ring (14). The plate 20 is attached so as to cover between the outer ring 14 and the inner ring 12.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a wheel that can move and transport lightweight objects and members lightly and smoothly and a pulley that can be applied to a small-diameter pulley, and in particular, to a space between an outer ring and an inner ring where a plurality of balls are arranged. The outer ring relates to a resin wheel with a shield plate made of synthetic resin and a resin pulley with a shield plate provided with a V-groove in the outer ring. The resin wheels with a shield plate of the present invention include, for example, a closet hanger roller, a sliding door hanger roller, a rotating hanger roller, a chair roller, etc. for furniture, a disk drawer roller for office equipment, and a paper feed for printers and copiers. Rollers, home appliances for refrigerator buckets for refrigerators, toys for mini 4WD side rollers, center rotating parts for yo-yos, and other rollers and conveyer rollers, such as money changers and cash dispensers. Can be suitably used for the side guard roller and the like. Further, the resin pulley with a shield plate of the present invention can be suitably used as a small-diameter pulley for office equipment and electronic equipment, for example.

[0002]

[Prior art]

 Conventionally, a guide roller (wheel) in which a ball is disposed between an outer ring and an inner ring has been used to guide a lighter object or the like to move. The same configuration is used for small diameter pulleys with light loads.

[Problems to be solved by the invention]

However, such a guide roller has a problem in that dust enters between the inner ring and the outer ring during use, and the outer ring becomes difficult to rotate, resulting in a shortened life and a problem that it cannot be used lightly and smoothly. In addition, such a small diameter pulley for a light load has a similar problem. However, there is a conventional case in which a collar is protruded inward from one side of the outer ring, and the other side is covered with a ball retainer. There were serious problems. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a resin wheel and a pulley with a shield plate which can improve the life and can be used lightly and smoothly. It is.

[0004]

[Means for Solving the Problems]

 The present invention has been made to achieve the above object, and the present invention is configured as follows. A: An inner ring having a predetermined width is arranged inside an outer ring made of a synthetic resin having a predetermined width, and a plurality of balls are arranged between the outer ring and the inner ring to rotatably support the outer ring with respect to the inner ring. A resin wheel with a shield plate attached to both sides of the shield plate, which can cover the gap between the outer ring and the inner ring. B. The resin wheel with a shield plate according to the above A, wherein a stepped recess is provided on the entire inner periphery on both sides of the outer ring, and the outer diameter side of the shield plate is fitted into the recess and mounted. The inner diameter side is a resin wheel with a shield plate that can create a minute gap with the outer circumference of the inner ring. C. In the resin wheel with a shield plate described in the above B, in the shield plate, an annular plate material is bent and bent at an angle to one surface side of the plate material over the entire circumference near a large diameter portion thereof. The distal end near the large diameter portion is bent at an angle to the other surface of the plate over the entire circumference to form an outer peripheral bent portion, while the small diameter portion of the plate near the one side of the plate over the entire circumference. The inner peripheral inclined portion is formed by being slightly bent with an inclination, and the outer peripheral bent portion is fitted into the concave portion of the outer race with the open end side of the bent large-diameter portion facing outward. A resin wheel with a shield plate in which a shield plate is attached so that a gap of about 0.1 to 0.2 mm in radius is created between the tip of the inner peripheral inclined portion and the outer peripheral portion of the inner ring. D. The resin wheel with a shield plate according to any one of Items A to C, wherein a single or a plurality of grooves or a V-groove is provided in an outer peripheral portion of the outer ring. EA The resin wheel with a shield plate according to any one of the items AA to D, wherein the outer ring is made of a polyacetal resin. F. A resin pulley with a shield plate, in which an outer ring having one or more V-grooves on the outer periphery is arranged in place of the outer ring of the resin wheel with a shield plate according to any one of items A to E.

[0005]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings illustrating examples of the present invention. The resin wheel 10 with a shield plate shown in FIG. 1 has, for example, an outer diameter of about 20 mm and a width of about 6 mm, and is shown enlarged. The inner ring 12 is a short cylindrical member whose length is short with respect to the diameter, and an outer ring 14 made of polyacetal resin is arranged outside the inner ring 12. A plurality of balls 16 are arranged between the outer race 14 and the inner race 12, and the outer race 14 is supported rotatably with respect to the inner race 12. Each ball 16 is held at a substantially equal position on the circumference by a retainer 18 and can be rollably guided by orbits formed on the inner and outer peripheral portions of the outer ring 14 and the inner ring 12 respectively. It is being done. The outer ring 14 has a stepped concave portion 22 formed on the entire inner periphery on both sides thereof, and is fitted with a shield plate 20 by fitting.

As shown in FIG. 2, the shield plate 20 is formed such that an annular plate material is bent to one surface side of the plate material at an inclination angle of about 30 degrees over the entire circumference in the vicinity of the large diameter portion, and is bent. The tip end near the large diameter portion is bent to the other side of the plate at an inclination angle of about 75 degrees to the flat part of the plate (about 15 degrees to the vertical line of the plate) over the entire circumference. An outer peripheral bent portion 26 is formed, while a small portion (about 0.2 mm in radius) in the vicinity of the small diameter portion of the plate material is bent at a slight inclination angle on the one surface side of the plate material over the entire circumference. The inner peripheral inclined portion 28 is formed, and a gap having a radius of about 0.1 mm is formed between the distal end portion and the outer peripheral portion of the inner ring 12 at the time of attachment. This gap can be about 0.2 mm. Thus, the shield plate 20 that covers the space between the outer ring and the inner ring 12 is attached to the outer ring 14, and the gap between the outer ring 14 and the outer peripheral portion of the inner ring 12 is extremely small, so that dust enters the wheel 10. The rotation of the outer ring 14 is prevented from becoming heavy or unrotatable, and the life of the wheel 10 can be improved. Moreover, grease leakage can be prevented.

[0007] The shield plate 20 is attached to the concave portion 22 by fitting the distal end (open end) of the bent portion on the large-diameter portion side outward. The shield plate 20 is made of a steel plate having a thickness of about 0.15 mm. When the shield plate 20 is attached, the distal end of the bent portion on the large diameter portion side is located deeper than the opening of the concave portion 22. That is, the height of the distal end of the bent portion on the large diameter portion side is set to be as small as about 0.6 mm from the top of the outer circumferential bent portion 26 with respect to the depth of the concave portion 22 of 1.0 mm. Further, the opening side of the concave portion 22 is smaller in radius by about 0.1 mm than the portion where the bent portion on the large diameter portion is fitted, so that the mounting of the shield plate 20 is stabilized. The shield plate 20 has a plurality of cutouts (for example, cutouts having a width of about 0.5 mm and a depth of about 0.6 m) (e.g., 15 cutouts) at substantially equal positions on the outer circumference so as to reach the top of the outer bent portion 26. Location).

In the wheel 10 of the embodiment configured as described above, a support shaft (not shown) is fitted and fixed in the inner hole of the inner ring 12, and the other end of the support shaft is set on a target object. Use with it. As a mode of use, when the outer ring 14 moves while rolling on a stationary guide portion (rolling surface), a target object or the like is moved on the outer ring 14 rotatably supported by a position-fixed support shaft. It can be considered that the robot is moved while it is mounted, or that the two are compromised. For example, for furniture, sliding door closet roller, chair roller, etc., for office equipment, disk drawer roller, paper feed roller for printers and copiers, for home appliances, refrigerator vegetable bucket receiving roller, etc., for toys, mini 4WD side It can be used for rollers, center rotating parts of yoyos, etc., other bill feeding rollers for money changers and cash dispensers, rollers for conveyors, side guard rollers for chutes, and the like.

In the above embodiment, the outer periphery of the outer race 14 is not formed at all, but one or more grooves are formed in the outer periphery of the outer race, and the outer race 14 is rolled on a stationary guide member that can fit into the groove. The outer ring 14 may be moved by pushing. For example, in furniture, the use of a hanger roller in a closet or a roller in a rotating hanger corresponds to this. It is also possible to construct a resin pulley with a shield plate by incorporating an outer ring having one or more V-grooves on the outer peripheral portion in place of the outer ring 14 of the resin wheel with a shield plate. . It can be suitably used as a small diameter V pulley for office equipment and electronic equipment.

In the above embodiments, the outer ring 14 is made of polyacetal resin, but other resins can be used, and the shield plate 20 can be made of a material other than a steel plate. It is possible to increase or decrease the size of the image. Although several embodiments of the present invention have been described above, the present invention is not limited to such embodiments at all, and may be implemented in various modes without departing from the gist of the present invention. Of course.

[0011]

[Effect of the invention]

 Since the present invention is configured as described above, the following effects can be obtained. Since the outer ring and the inner ring of the wheel and the pulley of the present invention are covered on both sides of the inner ring with the shield plate, it is difficult for dust to enter the inside, the rotation irregularity is prevented, and the life can be improved. Also, grease leakage can be prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIGS. 2A, 2B, and 2C are a cross-sectional view of one part used in the embodiment, a front view in which a part is omitted, and a partially enlarged cross-sectional view.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Resin wheel with shield plate 12 Inner ring 14 Outer ring 16 Ball 20 Shield plate 22 Concave part 26 Outer peripheral bent part 28 Inner peripheral inclined part

Claims (6)

[Utility model registration claims] 1. An inner ring having a predetermined width is disposed inside an outer ring made of a synthetic resin having a predetermined width, and a plurality of balls are disposed between the outer ring and the inner ring to rotatably support the outer ring with respect to the inner ring. A resin wheel with a shield plate, wherein a shield plate capable of covering a gap between the outer ring and the inner ring is attached to both sides of the outer ring. 2. The resin wheel with a shield plate according to claim 1, wherein a stepped concave portion is provided on the entire inner periphery on both sides of the outer ring, and the outer diameter side of the shield plate is fitted and attached to the concave portion. A resin wheel with a shield plate in which a fine gap can be formed between the inner peripheral side of the inner ring and the inner peripheral side of the shield plate. 3. The resin wheel with a shield plate according to claim 2, wherein the shield plate is formed by bending an annular plate material with an inclination to one surface side of the plate material over the entire circumference near a large diameter portion thereof. The leading end near the bent large-diameter portion is bent over the entire circumference with an inclination to the other surface side of the plate material to form an outer circumferential bent portion, while the small-diameter portion near the plate material is surrounded by a plate material over the entire circumference. The concave portion of the outer ring is formed by slightly bending an inclined surface on one surface side to form an inner circumferential inclined portion, and forming an outer bent portion with an open end of the bent large-diameter portion facing outward. Attach to the shield plate by fitting into, the radius between the tip of the inner peripheral inclined portion and the outer peripheral portion of the inner ring is about 0.1 to
A resin wheel with a shield plate with a gap of 0.2 mm. 4. The resin wheel with a shield plate according to claim 1, wherein one or more grooves or V-grooves are provided on an outer peripheral portion of the outer ring. Resin wheels. 5. The resin wheel with a shield plate according to claim 1, wherein the outer ring is made of a polyacetal resin. 6. A resin with a shield plate, wherein an outer ring having a single or a plurality of V-grooves on an outer peripheral portion is arranged in place of the outer ring of the resin wheel with a shield plate according to any one of claims 1 to 5. Pulley.