JP3072504U - Caster structure - Google Patents

Abstract

(57) [Summary] [Problem] To limit the rotation angle of a caster of a bag, to prevent the bag from rotating more than 180 degrees during the traveling, and further use the bag of the bag without tilting due to the excess angle. Provided is a structure of a caster having labor saving by advancing casters. A caster to be attached to the bottom of a luggage, comprising a wheel, a wheel base, a bottom sealing piece, a bearing piece provided with a steel ball, an upper sealing piece, and a bottom base. Is provided with an angle limiting convex, and the convex shaft of the wheel mount is fitted into the shaft hole of the upper sealing piece. An integral angle locking piece is installed on the hole wall of the upper sealing piece shaft hole, and the angle limiting projection and the angle locking piece are combined to obtain a blocking effect. Since the wheel base can rotate only 180 degrees, the wheels also rotate only in the range of 180 degrees. Therefore, during the process, it does not exceed 180 degrees, and the box on it is 1
The problem of inclination caused by exceeding 80 degrees can also be avoided, the direction can be easily controlled, and stability and labor-saving effects are provided.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention restricts the rotation angle of the luggage caster to prevent the luggage from rotating more than 180 degrees during the traveling, prevents the luggage box from tilting due to the excess angle, and further reduces the luggage caster's travel. The present invention relates to a caster structure that saves labor.

[0002]

[Prior art]

 As is well known, a conventional leg wheel of a bag is provided with a wheel base and an integrated shaft center, and is configured by combining the shaft centers. The wheel base and wheels of this bag are arbitrarily rotated 360 degrees, and can be turned left and right by applying force.

[0003]

[Problems to be solved by the invention]

 However, this type of caster structure has the following disadvantages during use because the wheels rotate 360 degrees.

[0004] The operation includes turning straight and turning left and right. The turning should be possible within a 90-degree range (within 90 degrees to the left and 90 degrees to the right), that is, within 180 degrees. There is no need to rotate 360 degrees. Those rotating 360 degrees are suitable for "push" cargo pushers, but ordinary luggage is "towing", so rotation within 180 degrees is appropriate.

[0005] The conventional caster structure is rotated by 360 degrees, so that the wheels and the wheel base turn erroneously or rotate excessively during traveling, and the box body is tilted due to "unstable center of gravity". Would. Due to the phenomenon of the "box tilt", an acting force is generated, and the user must correct the grip by strengthening the grip and move straight so that the box does not tilt. For this reason, the caster structure of "360-degree rotation" makes it difficult to go straight, and the user must apply unnecessary force to go straight.

[0006] Further, since the rotation is 360 degrees, if it is not stable, it immediately rotates excessively, and if the gripping force is too small, the box easily tilts. These are mainly due to the ongoing tilting of the box.

[0007]

[Means for Solving the Problems]

 In order to solve the above problems, the structure of the caster of the present invention has the following features. First, the caster is composed of a wheel, a wheel base, a bottom sealing piece, a bearing piece provided with a steel ball, an upper sealing piece, and a bottom base. An angle limiting projection is integrally provided on the convex shaft of the wheel mount, and an angle locking piece is integrally provided inside the shaft hole of the upper sealing piece. The angle limiting protrusions and angle locking pieces are fitted together to obtain a limiting effect. Therefore, the wheel base rotates within 180 degrees, and the wheel integrated therewith rotates only within 180 degrees.

Second, since the wheel base rotates only within 180 degrees, the wheels do not exceed 180 degrees during the traveling, so that the center of gravity of the box is not excessively deflected. It is difficult to incline without an inappropriate change of the center of gravity (wheel).

Third, since the box center of gravity is within a specified range, the angle locking pieces and the angle limiting projections are combined to supplement the supporting force, and the user can easily move the box body and can change direction easily and reliably. No force is applied to the conventional grip, and it does not tilt.

[0010]

[Embodiment]

 Hereinafter, an embodiment of the caster structure of the present invention will be described with reference to the drawings.

First, as shown in FIGS. 1 and 2, the structure of the caster of the present invention includes a wheel base 10, a bottom sealing piece 26, a bearing piece 24, an upper sealing piece 20, and a bottom base 30. The wheel base is provided with wheels 13 at the lowest position, and a convex shaft 110 and a penetrating shaft hole 11 at the upper position.

A plurality of rotating steel balls 25 are installed on the bearing piece 24, the upper sealing piece 24 has a shaft hole 21 penetrating through the center, and a limiting projection piece 23 protruding on both sides. is set up. The bottom base 30 is formed as a single piece, and the center is formed into a convex shape to form a concave base 32. The concave base 32 has a shaft hole 31 formed therethrough, and the bottom has a limiting groove corresponding to the limiting convex piece 23. 33 are installed.

As a feature, the convex shaft 110 of the wheel mount 10 is integrally provided with an angle limiting protrusion 12 having a suitable width, and the shaft hole 21 of the upper sealing piece 20 is provided with an angle locking protrusion having a suitable width. A piece 22 is provided integrally. When the convex shaft 110 of the wheel base 10 is fitted into the shaft hole 21 of the upper sealing piece 20, the angle limiting projection 12 stops at the angle locking piece 22, and the angle limiting projection 12 has no angle locking piece 22. It will only operate within the angular range, and the wheel base 10 will change direction within a 180 degree range, and the wheels 13 will also rotate within a 180 degree range.

To assemble the caster according to one embodiment of the present invention, the bottom sealing piece 26 is fitted into the convex shaft 110 of the wheel base 10 and bonded to the wheel base 10, and the bearing piece 24 is further attached to the bottom sealing piece. 26 and fit the steel ball 25 on the bottom sealing piece 26. Also, the convex shaft 110 of the wheel mount 10 is fitted into the shaft hole 21 of the upper sealing piece 20, and the bearing piece 24 is placed between the upper and lower sealing pieces 20 and 26. The angle locking pieces 22 and the angle limiting projections 12 are aligned with each other on the same plane, and when the bottom base 30 is finally covered, the bottom sealing piece 26, the bearing piece 24, and the upper sealing piece 20 become concave recesses of the bottom base 30. 32. The restricting convex piece 23 on the upper sealing piece 20 fits in a restricting groove 33 in the concave base 32, and the rotation of the upper sealing piece 20 is further restricted. Finally, the shaft rod 14 is passed through the shaft hole 11, the bottom sealing piece 26, the bearing piece 24, the upper sealing piece 20, and the shaft hole 31 of the bottom base 30 of the wheel base 10, and riveted. It is assembled and attached to the box (the bottom 30 is attached to the box).

For use of the present invention, as shown in FIGS. 2, 3 and 4, it is necessary to control the direction of the box (straight, left turn, right turn), and the description of each is as follows. It is.

There are two problems in moving the box straight. First, the box volume is large and it is difficult to move due to the weight of the contents. Second, the operation is not performed correctly by the user. Loss of center of gravity. These two phenomena are caused by the deflection of the wheels and wheel base. For this reason, the user must go straight, taking care not to fall down by hand. Therefore, in the present invention, an angle limiting protrusion 12 is provided on the wheel base 10 to prevent the wheel base 10 from rotating without permission, and the angle limiting projection 12 is blocked by the angle locking piece 22 of the upper sealing piece 10, The wheel base 10 and the wheels 13 are prevented from rotating 360 degrees. In addition, the angle locking piece 22 of the upper sealing piece 20 also has an effect of restricting the rotation of the wheel base 10, so that even if the wheel rotates by mistake while traveling straight, the wheel is cut off and the "supporting force" is reduced. Occur. Due to these prescribed restrictions, the blocking effect, and the supporting force, the force applied to the handle of the user can be suppressed, so that the user can go straight without applying unnecessary force and without falling down the box.

Left turn, Right turn When it is desired to turn the box to the right or left, if a rotational force is applied by hand, the bearing is rotated between the wheel base 10 and the upper sealing piece 20 by the bearing piece 24, and the angle limiting projection 12, the angle The locking pieces 22 interrupt each other and bend within 90 degrees (leftward or rightward). Therefore, the wheels 13 are prevented from rotating 360 degrees, and the box 1 is not excessively inclined. Also, in the process of changing the direction, the angle limiting projection 12 and the angle locking piece 22 block each other to generate a supporting force, so that the box 1 does not excessively tilt and deflect, and turns right and left. Even so, the box 1 is hard to fall down. Also, since it does not rotate excessively, the direction can be easily changed from straight ahead, and the force applied by the user is small.

[0018]

[Effect of the invention]

 As described above, according to the present invention, a wheel, a wheel base, a bottom sealing piece, a bearing piece provided with a steel ball, an upper sealing piece, and a bottom base are integrally formed with the convex shaft of the wheel base. The limiting protrusion is provided, and the angle locking piece is integrally provided inside the shaft hole of the upper sealing piece. The angle limiting convex and the angle locking pieces have a characteristic that they are mutually matched to obtain a blocking effect. As a result, the center of gravity of the box is not excessively deflected, the center of gravity of the box is hardly inclined, and the direction can be changed easily and reliably, so that the box can be advanced without applying force to the grip. It is effective for

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a caster showing an embodiment of the present invention.

FIG. 2 is an assembled sectional view of the embodiment of the present invention;

FIG. 3 is a bottom view showing a state in which the casters according to the embodiment of the present invention are arranged at the bottom of a bag.

FIG. 4 is an explanatory view of an angle limitation in a caster according to an embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Box body 10 Wheel base 11 Shaft hole 110 Convex axis 12 Angle limiting convex 13 Wheel 14 Shaft rod 20 Upper sealing piece 21 Shaft hole 22 Angle locking piece 23 Limiting convex piece 24 Bearing piece 25 Steel ball 26 Bottom sealing piece 30 Bottom 31 Shaft hole 32 Recess 33 Limit groove

Claims (1)

[Utility model registration claims] 1. A caster structure mainly including a wheel base, a bottom sealing piece, a bearing piece, an upper sealing piece, and a bottom base, wherein a wheel is installed below, and a convex shaft is provided above. A wheel base with a through-going shaft hole, a bearing piece with a plurality of rotating steel balls installed, and an upper sealing piece with a center hole with a through-hole and limiting projections protruding on both sides With one piece, a concave base is formed with a convex shape in the center, a shaft hole is penetrated in this concave base, and a bottom base provided with a restriction groove corresponding to the restriction protrusion on the bottom surface is provided. An angle limiting projection having a suitable width is integrally provided on the convex shaft of the wheel mount, and an angle locking piece having a suitable width is integrally provided on the inner wall of the shaft hole of the upper sealing piece. When the convex shaft of the wheel mount is fitted into the shaft hole of the sealing piece, the angle limiting projection and the angle locking piece are mutually fitted to limit the movement, and the angle limiting projection has no angle locking piece. The caster structure is movable only within a range, and the wheel base can be rotated only within a range of 180 degrees.