JP3113790U - Two-wheel hand cart for uneven steps - Google Patents

Abstract

[PROBLEMS] To fold a truss as small as possible when it is not needed, such as storage, and to make a truss structure with a simple operation when used, and at the step, a stroller that has the same effect as climbing over a step with a wheel that is pseudo-larger than the wheel The problem is to include a hand cart.
A quadrilateral is automatically made into two triangles by a quadrilateral assembled by a four-point link and a bracing function pipe that follows the diagonal of the quadrilateral through a guide pipe connected to one side by a pin. By using the truss structure, it is strengthened during use, and the front wheel 26a is attached, the wheel 26b is attached obliquely forward from this position, and a similar effect can be obtained by overcoming the step with a pseudo large wheel d. It is a double-wheeled hand cart that features a mechanism that automatically removes the braces and flattens it, and that accommodates steps including a baby carriage.
[Selection] Figure 1

Description

Detailed description of the invention

Technical fields belonging to the device

The present invention relates to a foldable hand cart having a wide range of uses that can be used as a chair for transporting a healthy person's object, a vehicle for an infant, and a walk-behind person for a care recipient, and also allowing light movement of uneven steps.

Conventionally, the frame of this type of car (including baby carriages) has many X and A type structures and is a link structure that is a modified X / A type, so folding is convenient. If there was a problem that the structure was not strong enough, at the same time, the impact and resistance were large on uneven roads with small wheels.
Prior published patents JP 2003-93452 JP 2003-164500
Real Kaihei 7-7639

Problems that the device tries to solve

The problem to be solved is that this hand cart overcomes the conventional technology and folds small when stored, and when using it, it is easy to operate and does not wear a large wheel with a strong truss structure, and easily overcomes unevenness. It is a problem.

Means to try to solve the problem

The present invention is a bracing function pipe that follows a quadrilateral that is assembled by a four-point link in which four basic pipes are connected by pins, and a diagonal line of the quadrilateral is connected through a pipe that is connected to one side by a pin. By making the quadrangle into a truss structure that is automatically made into two pseudo-triangles, the vehicle body has a strong structure when in use, and wheels are attached to four locations below the vehicle body. The front two wheels can be moved with light resistance without attaching large wheels even if there are bumps on the ground, and the wheels that are always grounded on a flat ground and the wheels that are grounded when there is a step on the front diagonally. It is a hand cart characterized by a mechanism and a mechanism that automatically removes the braces when stored and flattens them.

A quadrilateral is automatically assembled with a quadrilateral through a guide pipe that is assembled with a four-point link and a pin is connected to one of the four sides. The structure is set, and wheels are attached at four locations below the vehicle body. For the two wheels in the front, a wheel that is always grounded on a flat ground and a wheel that is grounded when there is a step on the front diagonally, and a mechanism that can move even with uneven steps with light resistance, A car that has two forms to release the cross and make it flat.

As shown in FIG. 1, the spindle frame 1 and the lower frame 3 attached to the lower part are connected via pins 2, the lower frame 3 and the vertical frame 5 are connected via a holder 4, and the vertical frame 5 and the upper frame 7 are connected. And the upper frame 7 and the spindle frame 1 constitute a pin-shaped quadrilateral via pins 8. Therefore, each side becomes various quadrilaterals by a pin or a holder that can freely rotate.

A bracing frame 13 is attached via a pin 12 below the spindle frame 1 so that the quadrilateral can be divided into pseudo triangles. The guide frame 15 is joined to the upper frame 7 with a pin 14 so that the bracing frame 13 is guided on the diagonal of the quadrilateral, and the guide ring 16 and the guide ring 17 are pin-connected. Accordingly, a state in which the bracing frame 13 is guided diagonally in the process of opening from the folded state as shown in FIG. 4 and is firmly fixed by the diagonal attachment / detachment holder 18 is shown in the upper right of FIG. The guide frame 15 also functions as a support for the stored items.

A lid frame 10 is attached to the upper frame 7 through a holder 9, and a seat mat 11 is attached to the lid frame 10. As shown in the upper left of FIG. 2, the lid frame 10 can be opened and closed in the direction of the arrow, and can be opened to store the item in the storage space 29 and close to support a person or load the item.

Wheels 19 are attached to the spindle frame 1. The handle frame 20 attached to the spindle frame is stretched and adjusted in the direction of the arrow to determine a convenient position and fixed with a handle stretch position fixing screw 21.
When the brake handle 22 attached to the handle frame 20 is gripped as shown by the arrow as shown in the lower right of the figure, the brake wire 24 is used to press the outer periphery of the wheel 19 with the brake 23 as shown in the lower left of the figure. In order to maintain this state, restrain with the brake maintenance buckle 25.
If the brake maintenance buckle 25 is loosened and the brake handle 22 is freed, the wheel rotates freely.

As shown in the upper right figure of FIG. 1, the wheel 26a is attached to the frame 5 so as to be angularly rotatable, and the wheel 26b is supported by a hook-like frame attached obliquely.
Therefore, when moving on a plane as shown in FIG. 3, the wheel 26a is grounded and rotates. At the small step H1, the wheel 26a rides on as it is. However, since the wheel 26b moves over the large step H2, the same effect can be expected as if the step is overcome by a pseudo large radius R.

As shown in the cross-sectional view at the lower left of FIG. 1, the mechanism of the direction changing connecting rod 27 that connects the connecting pins 28 standing on the hook-shaped frame so that the wheels 26 a and 26 b are aligned in the direction toward the driver is shown.

FIG. 4 shows a folded state, and can be pushed or pulled when moving in the folded state. When storing, the wheel 19 can be fixed by pulling the brake handle 22 and tightening the maintenance buckle 25 shown in the upper left of FIG.

Effect of device

The present invention is a hand cart including a baby carriage that is easy to assemble, easy to use, easy to use, easy to fold, easy to fold, easy to fold, with a four-point link mechanism with wheels and a detachable structure of the brace function Can be provided.

  Plane explanatory drawing of front, side, back and cross-section YY of the present invention   Illustration of how to use the present invention   Diagram showing overstep   Illustration of the folded state

Explanation of symbols

1 Spindle frame 2 Pins 1 and 3
3 Lower frame 4 Holder 3.5
5 Vertical frame 6 Holder 5 ・ 7
7 Upper frame 8 Pin 7.1
9 Holder 7 ・ 10
10 Lid Frame 11 Seat Mat 12 Pin 1 ・ 13
13 Bracing frame 14 Pin 7 ・ 16
15 Guide frame 16 Guide link 7 ・ 13
17 Guide links 13.15
18 Diagonal Desorption Holder 7 ・ 13
19 Rear wheel 20 Handle frame 21 Handle telescopic position fixing screw 22 Brake handle 23 Brake 24 Brake wire 25 Brake maintenance buckle 26 For front wheel flat ground a For front wheel level difference b
27 Direction changing connecting rod 28 Connecting pin 29 Storage space 30 Umbrella H Step: Small step H1 Step H2
R Front wheel pseudo radius

Claims (1)

  It has a wide range of applications from infants to vehicles requiring nursing care, walking assistance vehicles, and transportation of goods. The basic structure is a 4-point link mechanism with a flexible structure using a lightweight pipe and a flexible structure, and this lightweight This is a hand cart that has a strong truss structure that is fixed by bracing following the pipe, and has wheels at approximately four positions on the tip. With a hand cart that can be attached with a wheel that touches when there is a step and attached, even with uneven steps, it can be moved with light resistance, it can be folded by detaching the truss structure, and a handle that adjusts to the height, It consists of a wheel direction change connecting rod that smoothly follows the intention to drive, a brake when the car is stationary, and a brake maintenance buckle that maintains the stationary state. It can also draw, when accommodated, hand cart that can be folded to release the diagonal desorption holder.

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