JP2000318617A - Single sleeve type handcart - Google Patents

Abstract

PROBLEM TO BE SOLVED: To release the rotation starting farce in the conventional system owing to only the reverse rotation of the wheel in the-carriage advance converting time, and the side deflection of the carriage in the converting time, by using a free wheel which slides its wheel installing part, for the free wheel installed to the carriage. SOLUTION: A free wheel in which the middle parts of the left and the right guide plates 7 installed parallel by taking intervals to its rotary plates 6 are made slidable along the guide plates 7 in a specific scope is provided, and arms 14 extended to the shaft installing plate of the free wheel are made parallel and a connection plate 8 is provided to rotate the front ends of the arms, in order to maintain the parallel condition of the left and the right wheels in the advance converting time. To the upper surface at the middle part of the connection plate 8 used only in the advance converting time, a handle 9 for rising holding purpose in order to maintain the parallel condition of the left and the right wheels is installed to the grip of a car body handle 2, by taking an interval.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelbarrow for heavy loads.

[0002]

2. Description of the Related Art Wheels to be mounted on a wheelbarrow are mounted by combining a fixed wheel and a free wheel (swinging caster type). A four-wheeled vehicle has two fixed wheels at either front or rear of an underframe.
It is usual that two wheels are combined with a free wheel.

[0003]

The conventional free wheel can follow up very well while traveling, but it is 4 to 7 times as large as the straight-line starting force at the time of switching between traveling (wheel material. Distance of eccentricity. Depending on road surface conditions). A heavy hand truck using a universal wheel that does not generate a turning starting force because the turning starting force is required, and the amount of pushing force on the hand truck is limited and the load capacity is limited.

[0004]

When the traveling is switched, the wheels for the free wheels do not swing by the length of the eccentric position, and the left and right wheels only need to reversely rotate in the opposite direction to the stopped direction. In this way, the universal wheel can be solved only by the starting force at the time of switching the traveling, the axle position is provided on the vertical line of the turning rotation axis of the axle support plate, so that the universal wheel has no eccentric position to attach the wheel,
An axle support plate and an arm plate are integrated, and a connecting handle is provided at both ends of an arm in which the left and right free wheels rotate in parallel.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 3 and 6. A pivot shaft 4 is provided at the center of a mounting plate 3 and a pivot plate 14, and an axle is attached to the pivot plate 14. The axle 6 provided on the axle support plate 5 with the support plate 5 mounted thereon is provided on a vertical line from the turning rotary shaft 4 to provide a free wheel without eccentricity.

The axle support plate 5 and the arm 8 of the universal wheel are integrally formed, and are fixedly mounted on the right and left lower surfaces of the vehicle body frame 15 with the mounting plates 3. Both ends of the arm 8 are fixed by a connecting plate 10 with a rotating pin 13 so that the arm 8 rotates in parallel.

A second embodiment of the present invention will be described below with reference to FIG. 2 and FIG. 6. A manual handle 11 is vertically mounted at the center of the upper surface of a connecting plate 10 for rotating both ends of an arm 8 in parallel. The hand is spaced parallel to the push handle 12 for the vehicle body to be parallel.

The operation is performed by using a push handle 12 when the pushcart is moved forward and when the advance is switched, and a manual handle 11 is used for operating the push direction.
The handwheel 11 moves during the movement 9 during the movement required to follow
To the left or right.

[0008]

By using the wheelbarrow of this configuration,
Since the turning starting force which requires 4 to 7 times the straight starting force of the conventional hand truck is not required, the traveling can be switched with the same starting force, so that the load capacity can be doubled, and the conventional method can be used when switching the traveling. The wheelbarrow wandered by the eccentricity of the free wheel and meandered, but this wheelbarrow did not wobble.

[Brief description of the drawings]

FIG. 1 is a perspective view of a heavy handcart.

FIG. 2 is a front view of a heavy handcart.

FIG. 3 is a front view of a universal loadable wheel.

FIG. 4 is a bottom view of a single wheel for heavy loads.

FIG. 5 is a bottom view of the double wheel for heavy loads.

FIG. 6 is a bottom view of the parallel moving assembly of the left and right twin free wheels.

FIG. 7 is a bottom view showing the parallel operation of the left and right twin free wheels.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Free wheel 6 Axle 11 Manual handle 2 Fixed wheel 7 Wheel 12 Hand push handle 3 Mounting plate 8 Arm 13 Rotating pin 4 Rotating rotating shaft 9 Moving 14 Rotating plate 5 Axle support plate 10 Connecting plate 15 Body frame

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[Procedure amendment]

[Submission date] September 1, 1999 (1999.9.1)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] One-sleeved wheelbarrow

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-sleeve pushcart.

[0002]

2. Description of the Related Art Conventional wheels attached to wheelbarrows are a combination of fixed wheels and swivelable wheels. A four-wheeled vehicle body has two fixed wheels at the front and rear and two wheels at the left and right and swivel wheels at the front and rear. Usually, two are combined on the left and right.

[0003]

A bogie equipped with a conventional swivel wheel is capable of following up very well while traveling, but requires three to five times the amount of turning start force with respect to the straight starting force when switching between traveling. Yes, the vehicle may swing left and right when switching the progress, and when the vehicle touches either the left or right in a narrow passage, it may not be possible to switch the progress. Not structure.

[0004]

It is only necessary that the wheels of the universal wheels rotate in the reverse direction in the traveling direction when the traveling of the bogie is switched. The universal wheels move between the right and left guide plates attached to the revolving plate when the traveling is switched. An arm extending from the axle support plate of the left and right free wheels is parallelized so that the wheel mounting portion is a free wheel having a structure that slides within a predetermined range along the guide plate, and in order to keep the left and right wheels parallel at the time of switching the progress. A connecting plate is provided so that the leading end rotates, and a rising handle for keeping the left and right wheels parallel to each other is provided on an intermediate upper surface of the connecting plate.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The free wheels attached to the left and right sides of the vehicle body 1 are parallel to the longitudinal direction of the revolving plate 6 with a space for the axle support plate 10 on which the axle 11 is assembled to be made to slide on the revolving plate 6 around the rotating shaft 5. 7 is fixed.

A fixed shaft 12 for a rolling bearing 13 attached to an axle support plate 10 is provided at an intermediate position between the left and right guide plates 7 and at an interval corresponding to an eccentric length to the right and left perpendicular to the rotary shaft 5.
Pierce and attach.

Rolling bearings 1 are provided on the left and right upper portions of axle support plate 10.
3 is provided with an elongated hole 15 that slides between the left and right eccentric positions, and a rolling bearing 13 is incorporated in the fixed shaft 12.

An arm 14 is attached to the upper left or right side of the axle support plate 10 in parallel with the wheels.

The universal wheel 3 having the above-mentioned structure is mounted on the left and right sides of the lower surface of the vehicle body 1 (FIG. 6). Arms 14 attached to the universal wheel 3 are made of equal length and parallel to each other. It is fastened by the connecting plate 8 so as to rotate.

The holding handle 9 attached to the upper surface of the connecting plate 8 (FIGS. 5 and 6) is used only when the progress is switched.
The holding handle 9 is attached so that the left and right free wheels operate in parallel in the traveling direction by the action of the connecting plate 8, and the grip portion is spaced apart from the body handle 2 to be parallel.

With the above-described structure, the wheels that have been rotating and traveling in parallel with the bogie at the time of switching the traveling of the bogie are stopped, and the rolling bearing 13 mounted on the fixed shaft 12 is rotated when an opposing traveling starting force is applied to the bogie. Since the wheel is lighter than the frictional resistance value at which the wheel contacts the ground, the wheel moves between a predetermined eccentricity before the wheel, and the movement of the rolling bearing 13 is completed. The course can be changed by the same function as the universal wheel.

In order to reduce the overall height of the vehicle body to a low floor for heavy loads, the wheels of the universal wheel having the above-mentioned function are formed as double wheels.

[0013]

According to the present invention, the free wheels mounted on the bogie are provided by using the free wheels on which the wheel mounting portion slides, so that when the traveling of the bogie is switched, the wheels only rotate in the reverse direction, and the turning start force as in the prior art and the side of the bogie during the switching. Swing can be eliminated.

[Brief description of the drawings]

FIG. 1 is a perspective view

FIG. 2 is a front view showing the operation of the free wheel when traveling to the right.

FIG. 3 is a front view showing the operation of the free wheel when traveling left.

FIG. 4 is a bottom view showing the operation of the universal wheel when traveling to the right.

FIG. 5 is a front view of the trolley traveling right.

FIG. 6 is a bottom view of the trolley traveling right.

FIG. 7 is a front view of the vehicle traveling to the left after switching the carriage traveling.

FIG. 8 is a bottom view at the time of traveling to the left after switching the bogie traveling.

FIG. 9 is a side view of a bogie handle.

[Description of Signs] 1 body 11 axle 2 body handle 12 fixed shaft 3 free wheel 13 rolling bearing 4 fixed wheel 14 arm 5 rotary shaft 15 long hole 6 turning plate 16 eccentric 7 guide plate 8 connecting plate 9 holding handle 10 axle support Board

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 3

FIG. 4

FIG. 5

FIG. 6

FIG. 7

FIG. 8

FIG. 9

Claims (2)

[Claims] 1. The structure of a universal wheel provided on the lower left and right sides of an underframe to which a handle for hand pushing is attached is a universal wheel having wheels provided on a vertical line from the center of a rotating shaft and having no eccentricity.
A wheelbarrow for heavy loads, wherein the axle support plate and the arm are integrated, and both ends of the arm are rotated by a connecting plate to rotate the free wheel in parallel. 2. A handle portion of a manual handle for operating the free wheel is provided at the center of a connecting plate provided so as to rotate the arm of the left and right free wheel in parallel with the hand push handle of the bogie. Wheelbarrow for heavy loads characterized by being attached to