JPS6137019A - Load support apparatus back-carrying type working machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for supporting the load of a backpack-type working machine, such as a powered or human-powered mower or weeder.

When carrying these backpack-type work machines on their backs, workers not only have to carry the heavy machine carrying equipment such as fuel and chemicals on their backs, but also have to carry out operations such as mowing grass or spraying chemicals. It is extremely tiring to have to move around while doing so.

Therefore, the present invention is designed to support the load of these working machines by the worker's body weight instead of the conventional worker's shoulders.

The method of supporting the load using the worker's weight is as follows:
Firstly, there is a method using a seesaw, and another method is using a container filled with gas or liquid.

The method using a seesaw will be explained below with reference to the attached drawings.

Attached Figure 1 shows the seesaw (1) and the load support rod (2). , load support rod (2
) is attached to the frame (5) of the working machine using pins, bolts, or other connection methods so that it can bend and expand, as shown in Figure 3.

Furthermore, the front end of the seesaw (1) is attached to a string or band (6
), etc., to attach it to the sole of the worker's foot.

When the operator's weight is applied to the front end of the seesaw (1) when the seesaw (1) is attached in this way, the outside of the seesaw (1) will move forward (towards the right) starting from the center, as shown in Figures 1 to 3. )
The back end of the seesaw is lifted up using the principle of lever, and this becomes a fulcrum.

This pushing up force is transmitted from the rear end of the seesaw (1) to the frame (5) of the backpack-type working machine via the load support rod (2) connected thereto, and supports the load.

In this way, the load of the backpack-type working machine, which the worker had to carry on his back in the past, can be supported by the weight of the worker who steps on one end of the seesaw (1). It is a load supporting device.

Although there are individual differences in size among backpack-type work machines, they generally weigh around 20 kg, so let us assume that the fulcrum of the seesaw (1) used in the present invention is set near the center, and the weight of the worker is 50 kg. If this is the case, the load of the backpack-type work machine can be sufficiently supported even if the weight is less than half of the worker's weight.

As the work progresses, the seesaw (1) is supported at its rear end by the lower end of the load support rod (2) and its front end by the worker's tied legs, and is lifted and carried forward one by one. It will be revealed.

The seesaw (1) is used in the present invention to prevent the worker's weight from being applied to the seesaw (1) as soon as it lands again, but this does not result in a sudden impact that is transmitted to the load support rod (2) or the backpack-type working machine. The seesaw (1) is preferably made of a material with excellent elasticity, such as piano wire, steel plate, or special synthetic resin.

The reason why the deeply arched seesaw (1) in Figure 1 becomes a more straight-line arched shape in Figure 3 is because it is bent due to the load of the backpack-type work machine. This shows how it absorbs sudden shock and gently supports the load.

In addition, the front and back length of the seesaw (1) is set so that the rear end of the seesaw (1) is located directly below the backpack-type work machine when the worker is in the working posture. It can easily support the load of backpack-type work equipment.

Another important length is the length of the load support rod (2).

If it is too long, it will drag when walking; on the other hand, if it is too short, the arch of the seesaw (1) will have to be made larger and deeper, making it impossible to expect sufficient operation.

This is because the seesaw (1) is a lever, and the closer the lever is to a straight line, the more fully its function is exhibited.

There are large individual differences in the height of workers, and the height of the work equipment they carry on their backs also varies depending on the length of the strap they carry on their backs, so it is important to specify the length of this load support rod (2). However, as shown in Figure 3, the lower end of the load support rod (2) should be approximately 5 to 10 cm above the ground when the work equipment is carried on the back. is preferred.

Another method of supporting the load using the worker's weight is
As shown in Figure 2, this method uses a container filled with gas or liquid.

Two containers (1
′) and (3) are filled with gas or liquid, and when they are connected with a pipe (4) and the weight of an operator is applied to one container (1′), the pressure inside container (1′) will be reduced. rises, and the gas or liquid inside flows from the pipe (4) into the container (3), which swells, extends downward, and touches the ground.

The inflatable container (3) is designed so that the reaction when it touches the ground pushes up the load support rod (2) connected to it, which acts as a force to support the load.

The upper end of this load support rod (2) is connected to the seesaw (1
), the upper end of which is similar to the load-bearing rod (2) connected to
Attach to the frame (5) of the backpack-type work machine.

Further, the upper end of the container (1') is used by being attached to the sole of the worker's foot, similar to the front end of the seesaw (1).

In this way, the present invention uses the worker's weight as the driving force for supporting the load, whether using the seesaw (1) as described above or using a container filled with gas or liquid. Since the product is characterized by
) is lifted and the worker's weight can no longer be applied, the load of the knapsack-type work equipment is temporarily returned to the worker's shoulders until the worker's feet touch the ground next. .

However, since this only takes up a portion of the total working time, it is not as much of a burden on the worker as compared to the conventional method of carrying the bag on one's back throughout the work. If you want to support the load of a backpack-type working machine for the entire time, the load-supporting device for the backpack-type working machine of the present invention should not be attached to only one leg as shown in Figure 3. If you use a pair attached to both legs, the left and right legs will alternately cover the time when each other does not operate.
That purpose will be achieved.

As described above, the load support device of the present invention supports the load of the backpack-type work machine using the worker's body weight as the driving force, so no other power source is used. Moreover, it does not burden the worker, and the load of the backpack-type work machine, which the worker had to carry on his or her back, is supported instead of on the worker's shoulders.

The work of mowing grass and spraying chemicals using a backpack-type work machine becomes much easier as it relieves the burden of carrying a heavy machine on the back.

Another feature of the present invention is that the structure is simple considering its effects.

[Brief explanation of drawings]

Figures 1 and 2 of the appendix show a method of supporting a load according to the present invention, and Figure 3 shows an embodiment. In the figure, (1) is a seesaw, (2) is a load support rod, and (3)
and (1') is a container filled with gas or liquid,
(4) is a pipe, (5) is a frame of a backpack-type work machine,
(6) indicates a string or band.

Claims (1)

[Claims] When a worker puts his or her weight on one end of the seesaw, the other end of the seesaw is lifted. Also, if two containers that can be easily pressurized from the outside are filled with gas or liquid, and the insides are connected with a pipe, and the worker's weight is placed on one of the containers,
The pressure of the gas or liquid inside the container increases and flows through the pipe into the other container, which swells and becomes the force that lifts the object. In this way, the load is supported by a backpack-type working machine that uses a mechanism such as a seesaw or a container filled with gas or liquid to use the worker's weight as the driving force for supporting the load. Device.