JP2009113592A - Rolling suitcase having replaceable wheels - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make it possible to replace wheels of a rolling suitcase which are conventionally impossible to replace from outside; to provide a fixing tool and a cover for preventing the wheel from falling off, and a shaft locking structure. <P>SOLUTION: The rolling suitcase 1 having the wheels is configured so that an shaft projects horizontally in an internally fixed manner toward the outside of a sidewall of a lower end part of the rolling suitcase 1; the wheel 4 gets the shaft fitted into a hole at the center of the wheel 4; a head end part of the shaft is fixed with the fixing tool and covered with a wheel falling off prevention cover whose periphery is fitted into the wheel 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a technology that enables a wheel of a carry case having a caster at a lower part of the saddle to be replaced from outside the saddle.

  Conventionally, carry cases have become widespread as bags having simple transportation means. This carry case is characterized in that a handle portion made of a solid shaft is provided at the top of the heel and wheels for reducing the load during transportation are provided at the bottom of the heel. In using this carry case, the wheels tend to be overused, so there are many cases in which the wheels are damaged first and become unusable even though the bag body part is not damaged at all. In addition, small gravel or sand bites into the wheel and the wheel does not rotate well, and only the lower part of the wheel is often damaged by rubbing against the road or the like.

However, this conventional wheel cannot be replaced because the wheel is attached by caulking with rivets, and if such damage occurs, the wheel cannot be used even if the bag body can be used. Eventually, it was necessary to discard the entire bag or replace it. Although repair is possible, it is necessary to send it to the manufacturer for repair.
For example, Patent Document 1 discloses an apparatus that can easily replace a reduction gear and an outer ring portion of a wheel.

Japanese Utility Model 07-079044

However, according to the device described in Patent Document 1, the structure for fixing the wheel is complicated, and in the first place, a compact drive unit is configured by directly connecting the drive actuator and the speed reducer. Is installed inside the wheel in a sealed state, and the output of the reducer is taken from the case side of the reducer and connected to the outer ring of the wheel so that the outer ring of the wheel wraps the reducer It is configured so that it can be disassembled between the reduction gear output shaft and the wheel, and this concept cannot be applied to the carry case.
Also, in the carry case, the load is applied to the wheel, and the wheel is rotating during use. If the wheel is configured to be removable from the outside, the fixing device can be easily loosened from vibration due to rotation, and the wheel and the wheel can be fixed. There was a risk of parts falling off.
Further, if it can be replaced from the inside, it is actually difficult to remove or tighten a screw such as a nut in a narrow space inside the bag.
Therefore, the present invention has been made in view of the above problems, and while having a simple structure, it is easy to reliably replace the wheel from the outside, and further devise the fixture to prevent the wheel from falling off. A cover that fits with the inner ring of the wheel is provided to increase safety.

  In order to solve the above-described problems, the wheel replaceable carry case of the present invention is a carry case with wheels, in a state where the wheel is fixed from the inside, with the axle protruding horizontally outward on the side wall of the lower end of the carry case, Is fitted to the axle by a hole provided in the center thereof, the front end of the axle is fixed by a fixture, and further covered by a wheel drop-off prevention cover whose outer periphery is fitted to the wheel.

  Furthermore, the gist of the present invention is that a groove is formed at the front end portion of the axle, and the wheel is fixed by a set of divided nuts corresponding to the groove.

  The nut is composed of an upper nut and a lower nut. A screw hole is formed in the inner wall of the nut, and either one of the upper nut or the lower nut is contracted in the axial direction around the screw hole. A convex portion having a tapered outer peripheral surface is formed, and a concave portion into which the convex portion is fitted is formed around the screw hole on the other side, and the outer peripheral surface of the convex portion or the inner peripheral surface of the concave portion The gist of the present invention is that the nut is eccentric with respect to the screw hole and the other is a locking nut that is concentric with the screw hole.

  The fixing tool is a pin or spring that is bent into a hole provided at the front end of the axle after the wheel is inserted into the axle, and the free end front end that does not form the rear wheel after insertion can be widened away from each other. It is a summary.

  Finally, the gist of the fixture is to insert a wheel into the axle and then fit a stopper into a groove provided at the tip of the axle.

  The method for fixing the axle on the inner side of the axle is that the axle is covered with the axle cover so that the head of the axle provided at the tip of the inner side of the axle is recessed into the axle cover, and a stopper is provided at the axle covering entrance. And

According to the carry case with replaceable wheels according to the present invention, since the wheels can be easily replaced from the outside of the bag, even if only the wheel breaks down, it can be easily repaired by the user, which is preferable. In general, since the damage of the wheel is often quicker, such a structure extends the life of the entire carry case.
In this way, it was possible to replace the wheel with a fixing structure from the outside of the wheel, which is easy to loosen by rotation, the adoption of a method that can securely fix the wheel, and further, loosening of the fixture due to wheel rotation This is because a wheel drop prevention cover fitted to the inner ring of the wheel is provided for dropping the wheel and its accessories. By adopting such a configuration, it is possible to reliably prevent the wheel from dropping off.

  The wheel replaceable carry case according to the present invention, as shown in FIG. 1, is provided with a handle for adjusting the length and pulling the kite at the upper part of the kite, and a stopper for raising the kite at both front ends of the kite. Two (3) are provided, and wheels (4) are provided at the rear end of the bottom of the heel, that is, at both ends in the vicinity of the user's body side when used. Of course, the number of wheels is not limited to two, and the front stopper may be constituted by wheels. As shown in FIG. 2, the upper part of the wheel is covered with a tire house (7) as shown in FIG. 2, and a third lower part of the wheel is exposed to the outside. One end of the axle is fixed inside the bottom of the shaft, and both axles may be connected to each other or fixed to the bottom of the bottom.

  The wheel mounting / fixing means may be any means as long as the wheel can be mounted / fixed to the axle from the outside of the heel, for example, a pin type as shown in FIGS. 4 (a) and 4 (b). Or a stopper (fit ring type). Optimally, a configuration in which a split type locking nut and a groove corresponding to the tip of the axle are provided as shown in FIG. This nut is composed of an upper nut (10a) and a lower nut (10b). A screw hole (13) is formed on the inner wall of the nut, and a screw hole (13a) is formed on either the upper nut or the lower nut. A convex portion (14) having a tapered outer peripheral surface whose diameter decreases in the axial direction outward is formed around the upper nut (10a), and a concave portion (15) into which the convex portion is fitted is formed on the upper nut (10a) side. A locking nut formed around the hole (13a), wherein one of the outer peripheral surface of the convex portion or the inner peripheral surface of the concave portion is eccentric by a minute amount with respect to the screw hole, and the other is concentric with the screw hole. is there. Furthermore, as this nut, the upper nut is provided with a contact portion (16) that comes into contact with the lower end portion of a tightening tool such as a box wrench during the tightening operation of the upper nut. Also preferred is a locking nut characterized in that the amount is provided so as to be visible.

  In addition, as shown in FIG. 2, the wheel drop prevention cover (5) is in contact with the tightened nut with a slight gap so that the nut itself does not loosen, and the nut and other fixtures are attached to the wheel. The periphery of the cover is configured to be fitted to the wheel inner line (6) so as to be able to cope with a case where it comes off due to vibration or the like. Further, a tire house (7) is provided as shown in FIG. These shapes and materials are not limited.

  An embodiment of a wheel replaceable carry case according to the present invention will be described with reference to FIGS.

As shown in FIGS. 1 to 2, the wheel replaceable carry case (1) according to the present embodiment is provided with two front stoppers (3) at the lower part of the bag body (2) and two wheels ( 4). An enlarged view of the wheel portion is shown in FIG. The wheel (4) covers the entire axle connecting portion in the center of the wheel with a wheel drop prevention cover (5). The wheel drop prevention cover (5) has a shape that can be fitted into the inner line (6) of the wheel.
Further, the axle may have a single structure connected to both wheels, or may have a structure in which two wheels are respectively fixed to the inner side of the heel. For example, as shown in FIGS. 3 (a) and 3 (b), an axle cover (8 ') is provided on the inner side of the tire house (7) as shown in FIGS. An axle cover (8 ′) is formed by hollowing out a shape slightly smaller than the head (8 ″), and the axle is firmly inserted into the through hole (9). Since the hollow itself is slightly smaller than the axle head, the axle is firmly fixed to the axle cover after the axle is inserted. Further, in order to complete this fixing, a stopper (12 ′) may be provided outside the through hole entrance of the axle cover. In this way, the axle is firmly fixed on the inner side of the heel, so when replacing the wheel, even if the nut fitted to the axle is rotated from the outside, the inner fixation does not easily fluctuate. By rotating the nut, the axle can be fixed.
In the present embodiment, a screw groove that fits into a screw hole formed on the inner surface of the nut is formed at the outer end of the axle.

  In the present embodiment, as shown in FIGS. 2 (a) to 2 (d), the loosening prevention nuts are prevented from being loosened by using divided locking nuts. In the present embodiment, a split nut made by Hard Rock Industry Co. is used. First, the wheel (4) is fitted from the outside of the kite to the axle (8) fixed to the kite body, then the lower nut (10b) of the split nut (10) is fitted into the screw groove of the axle and then tightened. Tighten the nut (10a) in the same way. Furthermore, the wheel mounting is completed by fitting the wheel drop prevention cover (5) shown in FIG. 2 into the wheel inner line (6).

  Because of such a configuration, in this embodiment, first, even if the screw may be loosened during use, the wheel drop prevention cover firmly guards the wheel inner ring portion, so the loose screw Will not be scattered or lost. Further, when the wheel is damaged, the wheel can be easily replaced from the outside by removing the wheel drop prevention cover. Even when loosening the screw, the inner axle is firmly fixed inside the kite, so it does not rotate, no operation is required to fix the axle inside the kite, and the wheel can be easily removed. It becomes possible. Moreover, since the split nut has the above-described configuration, it does not rotate up and down together and is excellent in workability and operability.

  Furthermore, as a method of attaching the wheel to the axle, as shown in FIG. 4 (a), a folded leaf spring (11) may be inserted into the axle, or as shown in FIG. 4 (b). A groove in the short direction may be provided on the circumference of the axle tip, and the stopper (12) may be fitted in the groove.

  The present invention provides a carry case that can easily and reliably replace a wheel from the outside of the bag while having a simple structure, and has industrial applicability.

It is the whole carry case explanatory view of the present invention. (A) Wheel part enlarged view, (b) Wheel part AA schematic sectional drawing, (c) Wheel attachment explanatory drawing of Example 1, (d) Partial sectional explanatory drawing of a division | segmentation nut. (A) (b) It is explanatory drawing which shows the inner structure of an axle. (A) (b) It is explanatory drawing which shows the other Example of a wheel attachment structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Carry case 2 鞄 main body 3 Stopper 4 Wheel 5 Wheel drop prevention cover 6 Wheel inner line 7 Tire house 8 Axle 8 'Axle cover 8''Axle head 9 Through hole 10a Upper nut, 10b Lower nut 11 Leaf spring 12 12' Stopper 13 Screw hole 14 Concave portion 15 Convex portion 16 Contact portion

Claims (6)

  In a carry case with wheels, with the axle fixed from the inside, the axle protrudes horizontally from the side wall near the lower end of the carry case, and the wheel is fitted to the axle through a hole provided in the center to fix the axle tip. A wheel-replaceable carry case characterized by being fixed with a tool and covered with a wheel drop-off prevention cover whose outer periphery is fitted to the wheel.   2. The wheel replaceable carry case according to claim 1, wherein a groove is formed at the front end of the axle, and the wheel is fixed by a set of divided nuts corresponding to the groove.   The nut is composed of an upper nut and a lower nut. A screw hole is formed in the inner wall of the nut, and the diameter of the upper nut or the lower nut is reduced in the axial direction around the screw hole. A convex portion having a tapered outer peripheral surface is formed, and on the other side, a concave portion into which the convex portion is fitted is formed around the screw hole, and one of the outer peripheral surface of the convex portion or the inner peripheral surface of the concave portion is formed. The wheel-replaceable carry case according to claim 2, wherein the nut is eccentric with respect to the screw hole and the other is a locking nut that is concentric with the screw hole.   The fixing tool is a pin or a spring shape that is bent into a hole provided at the front end of the axle after the wheel is inserted into the axle, and the overlapping front end that does not form the rear wheel is widened in a direction away from each other. The wheel-replaceable carry case according to claim 1, wherein the carry-case is replaceable.   2. The wheel replaceable carry case according to claim 1, wherein after the wheel is inserted into the axle, the fixing member is fitted with a stopper in a groove provided at the front end of the axle.   The method of fixing the axle side of the axle is characterized in that the axle head provided at the front end of the axle side is covered with an axle cover so as to be recessed into the axle cover, and a stopper is further provided at the entrance of the axle cover. The wheel-replaceable carry case according to claim 1.