JPH09301180A - Handcart - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a handcart to be folded in pile simply by drawing left and right side part frames toward the inside surfaces respectively while lifting up a pair of supporting materials for a bottom part frame with their inside surfaces released upward. SOLUTION: A front frame 6 is taken out in such a manner as being extracted upward from insertion parts 27, 47 in front of the left/right side part frame 2, 4. Both leg parts 60, 60 are respectively inserted and stored in one side storing parts 33, 33. Subsequently, bolts 30, 50 provided in the insertion parts in rear of left/right side part frames 2, 4 are relaxed, and rear frame 7 is taken out in such a manner as being extracted upward. Both leg parts 70, 70 are respectively inserted and stored in other side storing parts 53, 53. Subsequently, one pair of supporting materials 10, 11 of a bottom frame 1 are lifted up in such a way that those internal side surfaces are relaxed upward. Thereafter, left/right side frames 2, 4 are drawn toward insides respectively to be folded in pile.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand cart for carrying luggage, and more particularly to a hand cart having a foldable structure.

[0002]

2. Description of the Related Art Heretofore, various types of trolleys and rear cars for transporting luggage having a foldable structure have been disclosed and are on the market. However, those wheelbarrows have a complicated structure to enable folding, and therefore are heavy in weight, and in order to reduce the weight, the materials are relatively expensive materials such as aluminum pipes. There was a problem such as high cost when using.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and its object is to make a structure for enabling folding simple and lightweight, and for anyone to easily fold it. It is to provide a wheelbarrow at a low cost.

As means for this, a bottom frame on which luggage is placed, left and right side frames of the bottom frame, and left and right side frames to which wheels are attached, and front and rear sides of the left and right side frames are connected to each other. Front and rear frames, and handle frames attached to the rear of the left and right side frames, and the bottom frame supports the lower side surfaces of a pair of supporting members having a rectangular cross section and abutting their inner side surfaces in parallel. The inner surface of the material is pivotally mounted so that it can be opened and closed upward, and the outer surface is provided with a plurality of horizontal members that extend outward along the longitudinal direction, while the left and right side frames are Vertical members provided with insertion portions for mounting the front and rear frames are vertically installed at both ends of the side surface support member where the outer ends of the horizontal members are respectively rotatable, and upper side surface supports that connect the vertical members. And the wheel supports for supporting the wheels are provided on the outside, respectively, and the front and rear frames are formed in a U shape having removable legs on the insertion portion, and the handle frame is a vertical frame of the left and right side frames. Removably attached to each material to form, front and rear frames are extracted from the left and right side frames, respectively, and a pair of support materials for the bottom frame,
It is characterized in that it is configured to be foldable by pulling the left and right side frames inward while lifting them so that their inner side surfaces open upward.

With the above-described structure, the bottom frame is pivotally attached to the lower side surfaces of a pair of support members having a rectangular cross-section with the inner side surfaces in contact with each other so that the inner side surfaces of the support members can be opened and closed upward. In addition, the outer surface has a structure in which a plurality of horizontal members that extend outward along the longitudinal direction are provided, and the outer ends of the horizontal members are rotated by the side support members of the left and right side frames, respectively. Since the inner surfaces of the support members are open upward, the inner surfaces of the support members are in contact with each other downward, so that the opening can be suppressed with considerable strength. That is, the structure for making it foldable includes a pair of support members pivotally mounted so that the inner side surfaces thereof can be opened and closed upward and the outer side surfaces of the support materials, and the side surface support of the left and right side frames. The structure is very simple because it consists of multiple horizontal members that can be rotated freely.
The number of parts is small and the production is simple.

[0006]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is a side view showing an embodiment of the present invention, FIG. 2 is a plan view showing an embodiment of the present invention, and FIG. 3 is a front view showing an embodiment of the present invention. 1 is a bottom frame, 2 and 4 are left and right side frames, 6 and 7 are front and rear frames, and 8,
Reference numeral 9 is a left and right handle frame. The bottom frame 1 is juxtaposed such that the inner surfaces of the support members 10 and 11 having a rectangular cross section contact the center, and the hinges 12 ... Are welded to the lower surface at appropriate intervals in the longitudinal direction. For that purpose, two support members 10, 11
The inner side surface can be opened and closed upward with the hinges 12 ... on the lower side surface as an axis, and the downward opening can be suppressed. Since the support members 10 and 11 can be restrained from opening downward due to the contact of the inner side surfaces thereof, it is not preferable to use a round pipe having a circular outer shape and a small contact area. Is preferably rectangular. Thirteen
・ ・ ・ Support material 1 by cutting a round pipe to an appropriate length
It is a horizontal bridging material that is welded so as to be horizontal from the outer surface of 0 and 11 toward the outside, and a plurality of horizontal bridging materials are provided at appropriate intervals along the longitudinal direction. The outer end portion is flatly crushed, and is formed and fixed in a roll shape that can be fitted onto the side surface supporting members 20 and 40 of the left and right side frames 2 and 4. Reference numeral 14 is a connecting rod that connects the horizontal members 13 ..., By making the space between the horizontal members 13 ... Small, it is possible to place a smaller load.

The right-side frame 2 has a U-shaped round pipe in which front and rear vertical members 21 and 22 and an upper side support member 23 are integrally formed at both ends of a side support member 20 made of a round pipe. To fix. At this time, the lower side of the front vertical member 21 is projected downward from the side surface supporting member 20 to be used as a foot for supporting when the loading platform is inclined forward. Reference numeral 24 denotes a wheel receiver that is welded so as to be horizontal outside the side surface support member 20. Numerals 25 and 25 are axle bearing fittings, which are welded to the lower portion of the side surface supporting member 20 and the central lower portion of the wheel bearing 24 so that the notches 26 for attaching the axle are coaxially opposed to each other, and the wheel 100 is attached. Each of the nuts 120 screwed to is tightened and fixed. 27, 28
Is an insertion portion welded to the front and rear vertical members 21, 22, and is formed in a cylindrical shape having an inner diameter slightly larger than the outer diameter of the leg portions 60, 70 of the front and rear frames 6, 7 and the rear insertion portion 28. A through hole 29 is formed at a proper position in the hole, and a nut 31 screwed with a coaxial bolt 30 is welded along the through hole 29.
After the rear frame 7 is inserted, the bolts 30 are formed so that they can be tightened and fixed to eliminate backlash after assembly. Also,
The bolts and the like may be attached to either the front or rear insertion portion or both. Reference numerals 32 and 32 denote left and right reinforcing support rods, which connect the wheel support 24 and the upper side support member 23 to increase strength.

Numerals 33 and 33 are storage portions for the front and rear frames 4 and 5 formed in a cylindrical shape, and either one of the front and rear frames 4 and 5 removed during folding, for example, the leg portions 60 and 60 of the front frame 6. It is for inserting and storing each. Therefore, the support rods 32, 32 are attached in consideration of the width and length of the front and rear frames 6, 7. Reference numeral 34 is a connection piece for attaching the right handle frame 8, which is provided with a through hole 35 for screwing in the upper portion of the vertical member 22 at the rear,
A plate material having a convex portion 36 protruding to a suitable height on the lower portion is welded. Numeral 37 is a side support fence to prevent the luggage from going outside, and the side support 20 and the front and rear vertical members 2 are provided.
An appropriate number of rods or pipes are welded and fixed between 1 and 22 and the upper side support member 23 in the vertical and horizontal directions. 38, when folding, removes the front and rear frames 6 and 7 and pulls the left and right side frames 2 and 4 inward, respectively, but at that time, the left and right side frames 2 and 4 are prevented from opening outward and falling. The stopper is a plate member cut to an appropriate size and fixed to the outer end of the horizontal member at the end of the bottom frame, and the end is in contact with the vertical member 22. The stoppers may be provided on one of the front and rear sides of the left and right side frames 2 and 4, or may be provided on both. The bottom frame 1 is attached to the plurality of horizontal members 13
.. are inserted into the roll-shaped outer ends of the lateral support members 13 ... And the lateral support members 20 are attached so as to be rotatable. The left side frame 4 is also formed in the same manner as the right side frame 2 and attached to the bottom frame 1.

The front frame 6 is formed by bending a round pipe in a downward U-shape to form both legs 60, 60. In the center, the round pipe is bent in an upward U-shape and a horizontal member is provided at an appropriate position. The supporting fence 61 is welded. The front frame 6 is attached to the insertion portions 27 provided in front of the left and right side frames 2 and 4,
Both legs 60, 60 are inserted into 47 and attached. The rear frame 7 is also formed in the same manner as the front frame 6 and is attached to the insertion portions 28 and 48 provided at the rear of the left and right side frames 2 and 4.

Reference numeral 8 denotes a right handle frame, which is composed of a handle portion 80 whose upper end is horizontally bent by a round pipe and a vertical portion 82 to which a connecting piece 81 is attached. The handle portion 80 has a grip made of resin or the like. Attach 83 by press fitting. The connecting piece 81 is provided with a screw-through hole 84 in the upper part and a recess 85 (or a transparent part) into which the convex part 36 is fitted in the lower part so that the connecting piece 81 can be overlapped with the connecting piece 34 welded to the right side frame 2 and fixed. A plate material having holes (or holes) is welded to the vertical portion 82.
The attachment to the right side frame 2 is performed by connecting the connection pieces 34,
81, the lower concave portion 85 and the convex portion 36 are fitted to each other, and the through holes 35 and 84 formed in the upper portion in a state of being overlapped with each other are attached to the bolt 8
6. Tighten with nut 87 to connect. The left handle frame 9 is also formed in the same manner as the right handle frame 8 and attached to the left side frame 4. Further, as shown in FIG. 4, the handle portions 180 and 190 of the left and right handle frames 108 and 109 are provided.
In addition, it is also possible to connect with the connecting rod 200 which can be attached and detached respectively by tightening and loosening the screws 181, 191. In that case, it is necessary to remove the connecting rod 200 when folding.

FIG. 5 is an explanatory view showing a folding procedure according to the present invention. First, the front frame 6 is attached to the left and right side frames 2,
3 is removed by pulling it upwards from the insertion portions 27, 47 in front of 3, and the legs 60,
60 are respectively inserted and stored, and subsequently, the bolts 3 provided on the rear insertion portions 28 and 48 of the left and right side frames 2 and 3.
The rear frame 7 is removed by loosening 0 and 50 respectively and pulling the rear frame 7 upward, and both leg portions 70 and 70 are inserted and stored in the other storing portions 53 and 53, respectively. Next, the pair of support members 10 and 11 of the bottom frame 1 may be folded by pulling the left and right side frames 2 and 4 toward the inside while lifting the pair of support members 10 and 11 so that their inner side surfaces open upward. it can. When folding, when the front and rear frames 6 and 7 are removed, the stopper 37,
57 prevents the left and right side frames 2, 4 from opening outward and falling. Further, by removing the handle frames 8 and 9 from the left and right side frames 2 and 4, it is possible to store them in a smaller space. When assembling from the folded state, the above method may be performed in reverse.

[0012]

As described in detail above, according to the handcart of the present invention, the lower side surfaces of a pair of support members having a rectangular cross-section and having the inner surfaces contacting the inner surfaces of the bottom frame are arranged in parallel with each other. The side surface is pivoted so that it can be opened and closed upward, and the outer surface has a structure in which a plurality of lateral members that extend outward along the longitudinal direction are provided. The inner side surfaces of the support members open upward, but the inner side surfaces of the supporting members contact each other to open because the side surfaces of the left and right side frames are rotatable. Can be suppressed with considerable strength. That is, the main foldable structure is a pair of support members pivotally attached so that the inner side surfaces can be opened and closed upward, and the side surface support members of the left and right side frames provided on the outer side surfaces of the support materials. The structure is very simple, the number of parts is small, and the manufacturing is simple, because it is composed of multiple horizontal members that can be freely rotated, and it is also economically advantageous. It is possible to obtain a wheelbarrow that is practically useful.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a plan view showing an embodiment of the present invention.

FIG. 3 is a front view showing an embodiment of the present invention.

FIG. 4 is a plan view showing another embodiment of the handle frame of the present invention.

FIG. 5 is an explanatory view showing a folding procedure of the present invention.

[Explanation of symbols]

 1 Bottom Frame 2 Right Side Frame 4 Left Side Frame 6 Front Frame 7 Rear Frame 8 Right Handle Frame 9 Left Handle Frame 100 Wheels

Claims (1)

[Claims] 1. A bottom frame on which luggage is placed, left and right sides of the bottom frame, and left and right side frames to which wheels are attached, and front and rear sides of the left and right side frames which are respectively installed and connected to each other. It consists of a frame and a handle frame attached to the rear of the left and right side frames,
The bottom frame pivotally attaches the lower side surfaces of a pair of supporting members having a rectangular cross-section and abutting the inner side surfaces thereof in parallel to each other so that the inner side surfaces of the supporting members can be opened and closed upward, and the outer side surfaces thereof. A plurality of horizontal members that extend outward along the longitudinal direction are provided on the left and right side frames, while the left and right side frames have front and rear ends of side support members on which outer ends of the horizontal members are rotatable. Vertical members each provided with an insertion portion for mounting the frame are hung, upper side support members for connecting the vertical members, and wheel supports for supporting wheels are provided on the outside, and the front and rear frames are the insertion portions. It is formed in a U shape with removable legs, and the handle frame is detachably attached to the vertical members of the left and right side frames, and the front and rear frames are pulled out from the left and right side frames, respectively. Bottom flare A trolley that is configured to be foldable by lifting the pair of support members so that their inner side surfaces open upward and pulling the left and right side frames inward. .