JP2005247031A - Portable cart - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable cart capable of restraining the physical influence a baggage receives from a road surface even when there are irregularities and small steps on the road surface or there is a small projection on a passage. <P>SOLUTION: This portable cart is furnished with a pair of left and right support pipes upper end parts of which are made into gripping parts, telescopic and in parallel with each other, an axle 14 supported on lower end parts of lower part pipes 20 of the support pipes through a bracket 12, a pair of left and right wheels 16 attached on the axle 14 and a baggage loading part 18 supported in a cantilever state in the neighborhood of lower ends of the support pipes free to revolve between a baggage carrying position where it is laid down forward against the support pipes and a hand-carrying position where it is pulled up to be superimposed with the support pipes, the axle 14 is supported on the bracket 12 so as to allow movement of the axle in the vertical direction and a compression coil spring 48 to energize the axle 14 downward is provided. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a folding portable cart used for carrying baggage and the like.

  This type of carrying cart generally includes a pair of left and right support pipes that are parallel to each other, an axle that is supported via a bracket at the lower end of the pair of support pipes, and a pair of left and right that are attached to the axle. And a load placing portion that is supported in a cantilevered manner near the lower ends of the pair of support pipes and is foldable. The pair of left and right support pipes are connected to each other at the upper end portion, and the connection portion serves as a grip portion for gripping by hand when the carrying cart is moved. Each of the pair of support pipes is formed by connecting a plurality of pipes, for example, three pipes, and the intermediate pipe is slidably inserted into the lower pipe, and the upper pipe is slidably inserted into the intermediate pipe. It has a stretchable structure. Then, when the upper pipe is pulled up with respect to the intermediate pipe, the intermediate pipe is pulled up with respect to the lower pipe, and the support pipe is extended, the upper pipe is fixed to the intermediate pipe, and the intermediate pipe is fixed to the lower pipe. A fixing mechanism is provided to keep the support pipe in an extended state. Moreover, the cancellation | release mechanism for canceling | releasing the fixed state of pipes is provided so that a support | pillar pipe can be contracted from the extended state.

When carrying a load with the carrying cart having such a configuration, the load placing portion is tilted forward with respect to the support pipe and opened so that the load placement portion is substantially perpendicular to the support pipe, and the support pipe is extended. , Put the luggage on the loading section. On the other hand, when carrying without a carrying cart, the intermediate pipe is pushed into the lower pipe, the upper pipe is pushed into the intermediate pipe, the strut pipe is contracted, and the load mounting portion is moved toward the strut pipe. It is made to fold so that a load mounting part may overlap with a support pipe (for example, refer to patent documents 1).
Utility Model Registration No. 2566598 (Page 4, FIGS. 3 and 4)

  When using the above-mentioned carrying cart and carrying baggage etc. on the loading platform, if there are irregularities or small steps on the road surface, or if the wheels get over small protrusions, the conventional carrying cart Then, there is a concern that the load placement part swings up and down, and the vibration is transmitted to the load, and the load moves on the load placement part and falls off or an impact is applied to the contents of the load.

  The present invention has been made in view of the circumstances as described above, and suppresses the physical influence that the load receives from the road even when the road surface has irregularities, small steps, or small protrusions in the passage. The purpose is to provide a portable cart that can be used.

  The invention according to claim 1 is a pair of left and right strut pipes that are extendable and parallel to each other, a grip portion that is connected to the upper end portions of the pair of strut pipes, and a lower end portion of the pair of strut pipes via a bracket. A supported axle, a pair of left and right wheels attached to the axle, a transport position that is tilted forward with respect to the pair of support pipes, and a mobile position that is caused to overlap the support pipe. In a carrying cart provided with a loading unit supported in a cantilevered manner near the lower ends of a pair of support pipes so as to rotate between, the axle is moved in the vertical direction with the axle as the bracket. Is provided with a resilient means for biasing the axle downward, and the wheel attached to the axle resists the resilient force of the resilient means. Upward relative to the loading part Characterized by being movable in.

  The invention according to claim 2 is the carrying cart according to claim 1, wherein the elastic means is a compression coil spring.

  The invention according to claim 3 is the carrying cart according to claim 1, wherein the elastic means is a leaf spring.

  In the carrying cart of the invention according to claim 1, since the axle is supported by the bracket so as to be movable in the vertical direction, and the axle is urged downward by the resilient means, the road surface having unevenness and small steps. The momentary upward force received from the road surface when the wheel moves over or over the small protrusion moves the wheel upward against the loading part against the elastic force of the elastic means. Absorbed by bullet means. As a result, it is suppressed that the road surface state or the like is directly transmitted to the load placing portion and the load placing portion swings up and down. Therefore, when this carrying cart is used, it is possible to suppress the physical influence received by the load from the road.

  In the carrying cart according to the second aspect of the present invention, the above-described effects can be reliably achieved by the elastic force of the compression coil spring.

  In the carrying cart according to the third aspect of the present invention, the above-described effect is reliably achieved by the elastic force of the leaf spring.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the best embodiment of the present invention will be described with reference to the drawings.
1 to 7 show an example of an embodiment of the present invention. FIG. 1 is a front view of a carrying cart, FIG. 2 is a side view thereof, and FIG. 3 is an enlarged view of a part thereof. 4 is a side cross-sectional view in which a part thereof is further enlarged, and FIG. 5 is a cross-sectional view taken along the line V-V in FIG. 4. FIG. 6 is a partially enlarged side cross-sectional view of the carrying cart in the state of carrying a load, and FIG. 7 is a cross-sectional view for explaining the operation of the bullet mechanism in the carrying cart.

  The carrying cart has a pair of left and right support pipes 10 and 10 connected to each other at the upper end and parallel to each other, and a pair of left and right brackets 12 and 12 at the lower ends of the pair of support pipes 10 and 10. Is supported by a cantilever in the vicinity of the lower ends of a pair of left and right wheels 16 and 16 and a pair of support pipes 10 and 10 that are rotatably supported by the axle 14. The load mounting portion 18 is configured. Each support pipe 10 is configured by connecting three pipes, that is, a lower pipe 20, an intermediate pipe 22, and an upper pipe 24 in a single bar shape. The upper end portions of the upper pipe 24 are connected to each other, and the connected portion is fitted with a sponge tube, a vinyl tube, or the like to form a grip portion 26 for gripping by hand when the carrying cart is moved. ing. The lower end portion of the upper pipe 24 is slidably fitted into the upper end portion of the intermediate pipe 22. Further, the lower end portion of the intermediate pipe 22 is slidably inserted into the upper end portion of the lower pipe 20, and the bracket 12 is fixed to the lower end portion of the lower pipe 20. The upper pipe 24 and the intermediate pipe 22, and the intermediate pipe 22 and the lower pipe 20 are each provided with a retaining treatment (details not shown).

  A reinforcing rod 28 is horizontally mounted and fixed to an intermediate portion between the pair of lower pipes 20 and 20, and a narrow tube 30 is horizontally mounted and fixed near the upper ends of the lower pipes 20 and 20. A fixing / releasing frame 32 is attached to the thin tube 30. The fixing / releasing frame 32 is formed by bending a steel thin rod into a U-shape when viewed from the front, and has a pair of left and right clamping hooks 34 and 34 and an operating hook 36. ing. The lower end portions of the respective holding hook portions 34 are bent inward, and the bent portions are inserted into both end portions of the thin tube 30 so as to be rotatable. The pair of left and right sandwiching hooks 34, 34 are formed in a shape that sandwiches the pair of intermediate pipes 22, 22 inward.

  When the support pipe 10 is extended from the contracted state, the upper pipe 24 is pulled up with respect to the intermediate pipe 22 and the intermediate pipe 22 is pulled up with respect to the lower pipe 20, and then shown by solid lines in FIGS. 1 and 2. As described above, the operating rod 36 is held with one hand, the fixing / releasing frame 32 is rotated upward, and the pair of clamping rods 34, 34 are engaged with the pair of intermediate pipes 22, 22 to hold The intermediate pipes 22 and 22 are elastically sandwiched between the flange portions 34 and 34. As a result, the intermediate pipes 22 and 22 are slightly bent inward, and the upper pipe 24 having the lower end inserted into the upper end of the intermediate pipe 22 is fixed to the intermediate pipe 22. The intermediate pipe 22 is fixed to the lower pipe 22 whose lower end portion is inserted into the upper end portion, and the support pipe 10 is maintained in the extended state. On the other hand, when the support pipe 10 is contracted from the extended state, as shown by a two-dot chain line in FIG. 2, the operating collar 36 is held with one hand and the fixing / release frame 32 is rotated downward. Then, the holding hooks 34 and 34 are detached from the intermediate pipes 22 and 22. As a result, the intermediate pipe 22 returns to the straight state from the inwardly bent state, the fixed state of the upper pipe 24 to the intermediate pipe 22 is released, and the fixed state of the intermediate pipe 22 to the lower pipe 20 is released. Will be. Thereafter, the upper pipe 24 is pushed down with respect to the intermediate pipe 22, the intermediate pipe 22 is pushed down with respect to the lower pipe 20, and the support pipe 10 is contracted.

  The load mounting portion 18 is supported by a support pin 38 fixed to the bracket 12 so as to be rotatable, and as shown by a solid line in FIGS. The pipe 10 is opened so as to be substantially perpendicular to the pipe 10, and is folded toward the support pipe 10 so as to be superimposed on the support pipe 10 as indicated by a two-dot chain line in FIG. 2. Then, when carrying the load by the carrying cart, the load placing unit 18 is opened by being pushed forward with respect to the support pipe 10, and the support pipe 10 is extended to load the load on the load placing unit 18. On the other hand, when carrying without using the carrying cart, the support pipe 10 is in a contracted state, and the load mounting section 18 is raised toward the support pipe 10 so that the load mounting section 18 is folded.

  As shown in FIGS. 4 and 5, the pair of left and right brackets 12 are each provided with a long hole 40, and the axle 14 can be slightly slidably moved in the vertical direction in the long hole 40. It is inserted. Near both ends of the axle 14, sliding rods 42 are integrally suspended in the engagement area with the bracket 12. As shown in FIG. 7, the sliding rod 42 is slidably fitted into the swinging cylinder 44, and one end of the swinging cylinder 44 rotates on the support pin 46 fixed to the bracket 12. It is supported freely. A compression coil spring 48 is extrapolated to the sliding rod 42, and the compression coil spring 48 is interposed between the axle 14 and the support pin 46, and the axle is supported with respect to the support pin 46 and thus the bracket 12. 14 is urged downward, and the axle 14 and the wheel 16 are normally positioned below as shown in FIG.

  Since this carrying cart is provided with the above-described elastic mechanism in the axle portion, as shown in FIG. 6, when carrying a load (not shown) with the carrying cart tilted, unevenness is caused. Even if the wheel 16 moves on a road surface with a small step or the wheel 16 gets over a small protrusion, even if an upward force is momentarily received from the road surface or the like, as shown by a two-dot chain line in FIG. While the cylinder 44 rotates about the support pin 46, the axle 14 and the wheel 16 move upward with respect to the bracket 12 and the load mounting portion 18 against the elastic force of the compression coil spring 48, and are pushed up from the road surface or the like. The force is absorbed by the compression coil spring 48. For this reason, it is suppressed that a road surface state etc. are directly transmitted to the load mounting part 18, and the load mounting part 18 shakes up and down. Therefore, when this carrying cart is used, the physical influence on the load on the load placement unit 18 from the road is suppressed, so that the load does not fall off from the load placement unit 18 and is added to the contents of the load. The degree of impact is reduced.

  In the embodiment shown in FIG. 8, the axle 52 that supports the wheel 50 is supported via a bracket 56 on the rear side of the lower pipe 54 of the support pipe. The configuration of the bullet mechanism is the same as the carrying cart shown in FIGS. That is, a long hole 58 is formed in the bracket 56, and the axle 52 is slidably inserted into the long hole 58. A sliding rod 60 is integrally suspended on the axle 52 in an engagement area with the bracket 56, and the sliding rod 60 is slidably fitted into a swinging cylinder 62. One end of the oscillating cylinder 62 is rotatably supported by a support pin 64 fixed to the bracket 56, and a compression coil spring 66 is extrapolated to the sliding rod 60, so that the axle 52 and the support pin 64 are connected. A compression coil spring 66 is interposed therebetween. Reference numeral 68 denotes a load placement portion, and the load placement portion 68 is rotatably supported by a support pin 70 fixed to the bracket 56.

  Next, the embodiment shown in FIG. 9 is different from the carrying cart shown in FIGS. 4 to 7 and FIG. That is, in the carrying cart shown in FIG. 9, a plate bent in a U shape on a bracket 78 fixed to the lower pipe 72 of the support pipe and rotatably supporting the load placing portion 76 via the support pins 74. A spring 80 is fixed. An axle 82 is fixed to the lower tip of the leaf spring 80, and a wheel 84 is rotatably supported on the axle 82. In the carrying cart provided with such a leaf spring 80 as well as the carrying cart shown in FIGS. 4 to 7 and FIG. 8, when the upward force is momentarily received from the road surface or the like, The spring 80 is deformed, the thrust force received from the road surface or the like is absorbed by the leaf spring 80, and the load placing portion 76 is restrained from swinging up and down.

  The expansion / contraction mechanism of the support pipe, the lower pipe and the intermediate pipe, and the fixing / releasing mechanism between the intermediate pipe and the upper pipe are not limited to those of the above-described embodiment, and various mechanisms can be adopted.

It is a front view of the carrying cart which shows an example of embodiment of this invention. It is a side view of the carrying cart shown in FIG. It is the side view to which a part of carrying cart shown in FIG. 1 was expanded. It is side surface sectional drawing which expanded a part of carrying cart shown in FIG. 1 further. It is a VV arrow sectional view of Drawing 4. It is a partially expanded side sectional view in the state which conveys a load with the carrying cart shown in FIG. It is sectional drawing for demonstrating the effect | action of the impact mechanism in the carrying cart shown in FIG. It is the side view which expanded another part of the carrying cart which shows another embodiment of this invention. It is the side view which expanded another part of the carrying cart which shows another embodiment of this invention.

Explanation of symbols

10 Support pipes 12, 56, 78 Brackets 14, 52, 82 Axes 16, 50, 84 Wheels 18, 68, 76 Loading parts 20, 54, 72 Lower pipes 22 Intermediate pipes 24 Upper pipes 26 Gripping parts 30 Narrow pipes 32 Fixed / Release frame 34 Holding hook 36 Operating hook 38, 46, 64, 70, 74 Support pin 40, 58 Long hole 42, 60 Sliding rod 44, 62 Oscillating cylinder 48, 66 Compression coil spring 80 Leaf spring

Claims (3)

A pair of left and right strut pipes that are telescopic and parallel to each other;
A gripping part connected to the upper ends of the pair of support pipes;
An axle supported via brackets at the lower ends of the pair of support pipes;
A pair of left and right wheels attached to this axle;
Cantilevered near the lower end of the pair of strut pipes so as to rotate between the transport position tilted forward with respect to the pair of strut pipes and the carrying position caused to overlap with the strut pipes A loading unit supported by
In carrying cart with
The axle is supported on the bracket so as to allow movement of the axle in the vertical direction, and provided with a resilient means for biasing the axle downward,
The carrying cart according to claim 1, wherein the wheel attached to the axle is movable upward with respect to the support pipe and the loading portion against a resilient force of the resilient means. The carrying cart according to claim 1, wherein the elastic means is a compression coil spring. The carrying cart according to claim 1, wherein the elastic means is a leaf spring.

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