JP5952882B2 - Caster with shock absorber for bag - Google Patents

Description

  The present invention relates to a caster with a buffer function attached to the bottom of a bag such as a travel bag, a suitcase, a trunk or the like.

  Traveling bags, suitcases, trunks and other caster bags are impacted by the unevenness of roads and steps during travel. In order to mitigate such an impact, a caster to which a buffer member is attached has been proposed.

JP 2012-101650 A JP-A-2005-192760

  However, the conventional bag caster with a cushioning member has a complicated structure and a large number of parts, requiring time for the assembly process, resulting in a problem that costs increase.

  An object of the present invention is to provide a caster with a cushioning function for a bag that solves the problems of the prior art, has a simple structure, has a small number of parts, is easy to assemble, and can be manufactured at low cost.

In order to solve the above-mentioned problems, the caster with a shock absorbing function for a bag according to the present invention has an upper fork that is rotatable about a vertical axis at the bottom of the bag, a wheel that supports a wheel and a horizontal axis that is supported by the upper fork. A lower fork, and a coil spring is wound around the horizontal axis, one end of the coil spring is fixed to the upper fork, and the other end is fixed to the lower fork. A partition in which the lower fork is biased in one rotational direction about the horizontal axis, and the upper fork has a thickness on the rotating side in one direction of the lower fork thicker than a thickness on the rotating side in the other direction of the lower fork. One end of the lower fork, which forms a portion and is biased by rotation in one direction, engages with a thick portion on the rotation side in one direction of the partition portion of the upper fork, Is prevented from rotation that is biased in a direction, and wherein the other rotational direction of the thickness of the thinned portion of the partition portion allows the rotation of the other direction against the urging force of the coil scan purine grayed lower fork .

  Further, in the bag caster with a cushioning function according to the present invention, the upper fork is formed with a stopper portion that engages with a part of the lower fork to prevent the lower fork from rotating in the urging direction. It is characterized by.

An upper fork that is rotatable about a vertical axis at the bottom of the bag, and a lower fork that is supported by a wheel and that is rotatable about the horizontal axis on the upper fork. A coil spring is wound around the coil spring, one end of the coil spring is fixed to the upper fork, and the other end is fixed to the lower fork, thereby urging the lower fork in one rotational direction about the horizontal axis. Therefore, it is possible to absorb shocks efficiently with a simple configuration, it is easy to assemble with few parts, and can be manufactured at low cost. Can be omitted.
By forming a stopper on the upper fork that engages with a part of the lower fork to prevent the lower fork from rotating in the rotational direction, only the partial shape of the upper and lower forks is processed. Thus, it is possible to stop the rotation of the lower fork in one rotational direction without using another member.

It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. (A) (b) It is a figure which shows embodiment of this invention. (A) (b) It is a figure which shows embodiment of this invention.

  An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the bag-supporting caster 1 for a bag according to the present invention is attached to the bottom 2a of a bag 2, such as a travel bag, a suitcase, or a trunk.

  FIG. 2 is a side view of the caster 1 with a cushioning function for a bag according to the present invention, and FIG. 3 is a front view thereof. A caster 1 with a cushioning function for a bag is provided with an upper fork 3 that is rotatably installed on a bag bottom 2a with a vertical axis as an axis, and a wheel 6 that is rotatable on an upper fork 3 with a horizontal axis 5 as an axis. The lower fork 4 is provided.

  4A and 4B are a front view and a side view of the upper fork 3, and FIGS. 5A and 5B are a front view and a side view of the lower fork 4, respectively.

The upper fork 3 has a shaft portion 3a that is inserted into a hole formed in the bag bottom portion 2a and is rotatable about a vertical axis. Between the hole of the shaft portion 3a and the bag bottom portion 2a, a bearing for smooth rotation of the shaft portion 3a is disposed. A female screw portion 3b is formed on the upper portion of the shaft portion 3a. A partition portion 3c having a larger diameter than the hole formed in the shaft portion 3a and the bag bottom portion 2a is formed in the lower portion of the shaft portion 3a. Both side wall parts 3d are formed in the lower part of the partition part 3c. Horizontal wall holes 3e for inserting and fixing the horizontal shaft 5 are formed in the side wall portions 3d. The shaft portion 3a, the partition portion 3c, and both side wall portions 3d of the upper fork 3 are integrally formed.

  The shaft portion 3a of the upper fork 3 is inserted into the hole in the bottom 2a of the bag where the bearing is disposed, and the nut 3f is screwed into the female screw portion 3b at the upper portion of the shaft portion 3a, and the upper fork 3 is rotated about the vertical axis. It is made possible to install and cannot be moved up and down by the partition part 3c and the nut 3f. The upper end portions of the left and right side wall portions 3d are connected to form a reinforcing portion 3g, and an opening portion 3h is formed in the reinforcing portion 3g as necessary. Details of the partition portion 3c will be described later.

  The lower fork 4 has both side wall portions 4a for receiving both side wall portions 3d of the upper fork 3. The both side wall portions 4a are provided with horizontal shaft holes 4b for rotatably supporting the horizontal shaft 5 and wheels 6 respectively. Both ends of an axle 6a that is rotatably supported via a bearing are fixed to axle holes 4c formed in the lower fork 4. An upper reinforcing portion 4d connecting the upper ends of the side wall portions 4a and an intermediate reinforcing portion 4e connecting the intermediate portions are formed.

  The side walls 3d of the upper fork 3 are positioned between the side walls 4a of the lower fork 4, and the horizontal shaft 5 fixed between the side walls 3d of the upper fork 3 is pivotally supported by the horizontal shaft hole 4b. 4 is attached to the upper fork 3 so as to be rotatable about the horizontal axis 5.

A coil spring 7 is wound around the horizontal shaft 5 fixed to both side walls 3d of the upper fork 3 and arranged. One end portion 7 a of the coil spring 7 is fixed to the intermediate reinforcing portion 4 e of the lower fork 4, and the other end portion 7 b of the coil spring 7 is fixed to the lower portion of the partition portion 3 c of the upper fork 3. The respective end portions of the coil spring 7 are fixed to the upper fork 3 and the lower fork 4. Although depending on the winding direction of the coil spring 7, in the embodiment shown in FIG. 1, the lower fork 4 rotates clockwise about the horizontal axis 5 as shown by the arrow due to the elastic force of the coil spring 7. Energized as follows.

  As shown in FIGS. 1 and 4B, the partition 3c of the upper fork 3 has a thickness on the rotating side in the clockwise direction of the lower fork 4 larger than a thickness on the rotating side in the counterclockwise direction. One end of the lower fork 4 urged by the clockwise rotation is engaged with a thick portion on the clockwise rotation side of the partition portion 3c of the upper fork 3, and the lower fork 4 is urged by the clockwise direction. Rotation is prevented. On the other hand, the counterclockwise thickness of the partition portion 3c is thin, and the counterclockwise rotation against the urging force of the coil spring 7 of the lower fork 4 is allowed.

  The state of use of the caster 1 with a cushioning function for a bag configured as described above will be described. While traveling on a smooth floor surface or the like, it is urged to rotate clockwise about the horizontal shaft 5, and by engagement between one end of the lower fork 4 and the thick part of the partition 3 c of the upper fork 3. The wheel 6 supported by the lower fork 4 that is prevented from rotating in the clockwise direction can smoothly rotate and travel stably.

  When traveling on a road surface with a rough surface or a stepped portion, an impact due to the unevenness or step of the wheel 6 supported by the lower fork 4 is fixed to the lower fork 4 at one end and the upper fork 3 at the other end. It is absorbed by the counterclockwise rotation and return rotation of the lower fork 3 by the elastic force of the coil spring 7 fixed to the ring.

  According to the caster with a cushioning function for a bag of the present invention configured as described above, the shock can be efficiently absorbed with a simple configuration, the number of parts is small, the assembly is easy, and the manufacturing can be performed at low cost. Since a certain coil spring is wound around a horizontal axis, a useless space can be omitted.

  1: Caster with cushioning function for bag, 2: Bag, 2a: Bottom of bag, 3: Upper fork, 3a: Shaft, 3b: Female thread, 3c: Partition, 3d: Side wall, 3e: Horizontal shaft hole 3f: nut, 3g: reinforcing part, 3h: opening, 4: lower fork, 4a: side wall part, 4b: hole for horizontal shaft, 4c: hole for axle, 4d: upper reinforcing part, 4e: intermediate reinforcing part 5: Horizontal axis, 6: Wheel, 6a: Axle, 7: Coil spring, 7a: One end of coil spring, 7b: The other end of coil spring

Claims (1)

An upper fork that is rotatable about a vertical axis at the bottom of the bag;
A lower fork pivotally supported by a wheel and rotatable about a horizontal axis on an upper fork;
With
A coil spring is wound around the horizontal axis, one end of the coil spring is fixed to the upper fork, and the other end is fixed to the lower fork so that the lower fork is rotated around the horizontal axis. The upper fork is formed with a partition that has a thickness on the rotating side in one direction of the lower fork thicker than the thickness on the rotating side in the other direction of the lower fork, and is biased by rotation in one direction. One end of the lower fork engages with a thick portion on the rotating side in one direction of the partition part of the upper fork, and the rotation biased in one direction of the lower fork is prevented, and the other part of the partition part is blocked. wheeled luggage buffer function, wherein the thickness is made thinner portion of the rotating direction to allow the rotation of the other direction against the urging force of the coil scan purine grayed lower fork.

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