JP4448877B2 - Wheel structure - Google Patents

Description

  The present invention relates to a wheel structure having a wheel stop function.

  Various furniture and appliances are equipped with wheels to facilitate their movement. Furthermore, in the location which installs the said instrument etc., the structure which does not exhibit a wheel function so that it cannot move is employ | adopted.

  As the simplest example, a so-called wheel stopper (Patent Document 1) in which a wheel is surrounded by a U-shaped member is known.

  In addition to the wheels, there are also known means (Patent Documents 2 and 3) provided with fixed legs protruding downward on the member, and means (Patent Documents 4 and 5) provided with a wheel rotation prevention mechanism such as a brake on the wheels themselves. ing.

JP 2004-182176 A. JP-A-5-220021. JP 2000-102432 A. JP-A-7-284430. Japanese Patent Laid-Open No. 10-35208.

  Wheel stoppers are normally used as a secondary safety measure for wheels equipped with brakes, as they prevent movement in one direction and in some cases may cause the wheels to step over. Not too much.

  Moreover, the brake function by the support leg is suitable for a table, a refrigerator, or the like with a low movement frequency, and is not suitable for a device that repeatedly stops moving to some extent.

  In many cases, the brake mechanism is incorporated in a small wheel called a so-called caster. Specifically, the wheel shaft is provided with a gear, and a claw body is locked to the gear to exert a braking action ( Patent Document 4) and a structure (Patent Document 5) that exerts a braking action by pressing a friction braking body on a part of a wheel are employed. However, adopting such a brake structure increases the number of caster assembly parts and causes an increase in cost.

  Therefore, the present invention proposes a wheel structure provided with a novel brake that has a small number of parts and realizes cost reduction.

  The wheel structure according to the present invention (Claim 1) includes a wheel portion and a ground contact surface portion on the outer periphery, and in a wheel produced by resin molding, a recess having an opening on the ground contact surface portion side is formed on the surface of the wheel portion of the wheel. In addition, the recess is housed in such a manner that the wheel can travel, and is built in such a manner that the wheel can be freely protruded from the opening portion toward the outer periphery of the wheel, and a braking body that prevents the wheel from rotating when protruding is provided. Wheel structure.

  Further, according to the present invention (Claims 2 and 3), in the structure described above, in particular, the brake body is provided so as to be able to protrude from the opening portion on the grounding surface portion side of the concave portion by rotating or sliding.

  Thus, in a state where the braking body is housed in the recess, normal wheel traveling is realized, and the brake body functions as a wheel brake (stopper) by projecting from the opening by turning or sliding movement of the braking body. In particular, the brake mechanism can be incorporated in a compact and easy operation by housing the braking body in the wheel surface recess.

  The present invention is as described above, and it is possible to provide a brake function only by incorporating a braking body into a wheel so as to be able to perform a predetermined operation. It is possible to provide a wheel having a brake function with a simple structure and low cost. Various furniture and equipment (daily necessities) provided can be easily manufactured.

  Next, an embodiment of the present invention will be described. A poly tank with wheels is illustrated as an object of the embodiment, and FIGS. 1 to 4 show the first embodiment.

  The wheel 1 is attached to an axle 3 attached to a main body (poly tank main body) 2. When the axle 3 is provided in a fixed state (non-rotatable state) on the main body 1, the wheel 1 is attached to the axle 3. If the axle 3 is provided on the main body 2 in a rotatable state, the mounting structure of the wheel 1 and the axle 3 is arbitrary.

  The wheel 1 is produced by resin molding to realize low cost. The wheel bearing part 12 is formed on the center back side of the wheel part 11 and the grounding surface part 13 is formed on the outer periphery of the wheel part 11. is there.

  The wheel 1 is provided with a brake part 4, and the brake part 4 is configured by a part of the wheel part 11, a recessed part 41 opened in the ground contact surface part 13, and a braking body 42 accommodated in the recessed part 41. Is done.

  The braking body 42 disposed in the recess 41 is pivoted in the vicinity of the ground contact surface 13 so that a part of the braking body 42 protrudes from the ground contact surface 13 of the wheel 1 by the rotation of the braking body 42. Is.

  In the above-mentioned pivotal structure, the projecting shaft 43 is provided at an appropriate position on the inner surface of the recess 41, the shaft hole 44 is formed at an appropriate position of the braking body 42, and the projecting shaft 43 and the shaft hole 44 are formed by press-fitting the braking body 42. To be fitted. Further, in order to prevent the braking body 42 from suddenly projecting while the vehicle is running, the fitting of the recess 41 and the braking body 42 is, for example, a tight fitting state so that the braking body 42 is held in the recessed portion storage state. Or adopt a click structure. At the same time, a part of the inner surface of the recess 41 is cut out (recessed) so as to make it easier to operate the brake member 42 in the holding state, and the finger insertion portion 45 is formed.

  Thus, in the state where the braking body 42 is housed in the recess 41, the wheel traveling is realized, so that the polytank can be easily moved. When a finger is put in and the braking body 42 is pulled out of the recess 41 and rotated 180 degrees, the braking body 42 protrudes to the outer periphery from the ground contact surface portion 13 of the wheel 1.

  Therefore, when the polytank is allowed to stand, if the brake body 42 is rotated and protruded, the brake body 42 will collide with the ground contact surface, thereby preventing the wheel 1 from rotating, and the polytank will be braked. It will be left in the state.

  The present invention is not limited to the above-described embodiment, and various modified structures can be adopted. For example, as illustrated in FIG. 5, a slide groove (protrusion) is formed on the inner surface of the recess 41 a in the wheel radial direction. 46, a protrusion (recess) corresponding to the slide groove (projection) 46 is provided in the brake body 42a, and the brake body 42a is slidably accommodated in the recess 41a. 42a is made to protrude from the opening by sliding movement to exert a braking function.

  Of course, a holding mechanism for storing the braking body (in the illustrated example, this is realized by a small protrusion on the bottom surface of the recess) and a maintenance mechanism for protruding are provided.

  Note that the present invention is not limited to the above-described poly tank, but is applied to instruments having various wheels.

The whole perspective view of the 1st real form of the present invention. FIG. In the main part perspective view, (a) shows a wheel travelable state, and (b) shows a brake state. In the cross-sectional view of the main part, (a) shows a wheel travelable state, and (b) shows a brake state. It is principal part sectional drawing of the 2nd actual form of this invention, (A) shows a wheel driving | running | working possible state, (B) shows a brake state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wheel 11 Wheel part 12 Axle bearing part 13 Ground surface part 2 Main body (poly tank main body)
3 Axle 4 Brake part 41, 41a Recess 42, 42a Brake body 43 Projection shaft 44 Shaft hole 45 Finger insertion part 46 Slide groove (projection)

Claims (3)

  A wheel (1) provided with a wheel portion (11) and an outer peripheral grounding surface portion (13), and a recess that opens on the surface of the wheel portion (11) of the wheel on the surface of the wheel portion (11). (41) is formed, and the wheel (1) is housed in the recess (41) so as to be able to travel, and is incorporated so as to be able to protrude from the opening portion toward the outer periphery of the wheel. A wheel structure comprising a braking body (42).   The brake body (42) is pivotally connected to an appropriate position on the inner surface of the recess (41) so as to be able to protrude from the opening by the rotation of the brake body (42), and the brake is braked in the recessed storage state. The wheel structure according to claim 1, further comprising a click structure for holding the body (42).   The brake body (42) is accommodated in the recess (41) so as to be slidable in the opening direction, and is provided so as to be able to protrude from the opening position by sliding movement of the brake body, and is provided with a brake body holding structure in the storage state of the brake body. The wheel structure according to claim 1.

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