JPH0423938Y2 - - Google Patents

Description

[Detailed explanation of the invention] A. Purpose of the invention [Industrial field of application] This invention is intended for use when the operator of various types of working machines, such as powered walk-behind snow blowers and power tillers, slips forward. , or a safety device installed at the rear of the aircraft to immediately stop the aircraft from moving backwards in the event that the operator becomes caught between an obstacle such as a wall or fence while moving backwards, or if the operator comes to a riverbank.

[Conventional technology]

As this type of safety device, a pair of left and right vertical rods are installed at the rear of the machine where the operating handle is attached, and the upper ends are pivoted to allow swinging. When touched and pushed forward, the traveling clutch lever is cut off via the vertical rod.
Alternatively, some vehicles are constructed so that the engine ignition circuit is opened and the vehicle stops running.

Furthermore, as an improvement on this, the upper safety frame is attached to the control handle diagonally backward and downward.
It is known that when the operator's abdomen hits the upper safety frame, the travel clutch lever is operated and the travel is stopped (Utility Model No. 58-156817
Publication No.).

[Problem that the invention attempts to solve]

However, in the conventional safety device described above, the horizontal rod that is the operation part is located near the abdomen of the body, so when you feel danger, even if you try to operate the horizontal rod with your hand before the abdomen hits the body. , it is difficult to operate due to its low position.

The object of the present invention is to provide a safety device that can be easily operated by hand in such cases.

B. Structure of the invention [Means for solving the problem] The invention has a control handle 2 at the rear of the fuselage 1, and a pair of left and right vertical rods whose upper ends are pivotally supported at the rear of the fuselage. 3,3 is provided, and its vertical rod 3,3
In a power-driven walk-behind work machine configured such that when a foot touches the horizontal rod 4 connecting the lower ends and is pushed forward, the travel stop device is activated via the vertical rods 3, 3. The lower ends 6a, 6a of the left and right rods of the portal frame 6 are fixed to the vertical rods 3, 3, and the upper horizontal rod 6b of the portal frame is placed near the grip 2a of the operating handle 2 and above the grip 2a. This is a safety device for a powered walking type work machine.

[Effect]

When the upper horizontal rod 6b of the portal frame 6 is placed with the hand and pushed downward or pulled toward the front, the vertical rods 3, 3 swing forward about the shaft 7 at the upper end, and the traveling stop device is activated.

Also, when a foot touches the lower horizontal rod 4, the vertical rods 3, 3 swing and the traveling stop device is activated in the same manner as described above.

〔Example〕

Figures 1 and 2 show an example in which the safety device of the present invention is applied to a working machine configured to electrically interlock vertical rods 3, 3 and a travel clutch lever 5, which is a travel stop device. , FIG. 1 is a side view, and FIG. 2 is a front view.

The vertical rods 3, 3 are equipped with a return coil spring (not shown) on the fulcrum shaft 7, so that engaging parts 12a formed at both ends of a switch operation part 12, which will be described later, catch on a stopper 10 provided at the rear of the fuselage. It is kept in the normal position by Reference numeral 11 denotes a push button type switch placed at the rear of the fuselage 1. When the vertical rods 3, 3 swing forward, a switch operating section 12, which is provided horizontally between the vertical rods 3, 3, is activated by the switch 11. It hits and gets pushed.

By operating the switch 10, the electromagnetic lock mechanism (not shown) that holds the traveling clutch lever 5 in the connected (clutched) position shown by the solid line is released, and the traveling clutch lever 5 returns to the position shown by the chain line and the power is cut off. .

Instead of operating the electromagnetic locking mechanism of the clutch lever 5, the engine ignition circuit may be cut off by the switch 10.

FIG. 3 shows another embodiment, in which vertical rods 3,
3 with a push rod 15 facing forward, and this push rod 15 is connected to the lever 1 integrated with the traveling clutch lever 5.
6, the traveling clutch lever 5 is directly operated by swinging the vertical rods 3, 3.

Although the operating handle 2 in each of the above embodiments is shown as having a U-shaped plan view, it is of course possible to use a substantially V-shaped operating handle in a plan view.

C. Effect of the invention The safety device of the invention has a gate frame 6 attached to the vertical bars 3, 3 of the frame for safety operation in an emergency, and the upper horizontal bar 6b of the gate frame 6 is attached to the grip part 2a of the operating handle 2. Since the vertical rods 3, 3 are configured to be located near the handle 2a and above the handle 2a, it is possible to quickly operate the vertical rods 3, 3 with the hand that is gripping the control handle 2. The safety operation frame consisting of the lower vertical rods 3, 3 and the horizontal rods 4 is effective as a safety device.

[Brief explanation of the drawing]

FIG. 1 is a side view of the main parts of a working machine to which the present invention is applied, FIG. 2 is a front view thereof, and FIG. 3 is a side view of the main parts of another embodiment. 1 is the fuselage, 2 is the control handle, 3 is the vertical rod, 4 is the horizontal rod, 5 is the traveling clutch lever, 6 is the portal frame, 6
a is the lower end of the portal frame 6, and 6b is the upper horizontal rod of the portal frame.

Claims (1)

[Scope of Claim for Utility Model Registration] A control handle is provided at the rear of the fuselage, a pair of left and right vertical rods are provided at the rear of the fuselage whose upper ends are pivotally supported and are swingable, and a horizontal rod connects the lower ends of the vertical rods. In a power-driven walk-behind work machine configured so that when a foot touches and is pushed forward, a travel stop device is activated via the vertical rod, the lower ends of the left and right rods of the portal frame are attached to the pair of left and right vertical rods. A safety device for a power-driven walk-behind work machine in which the upper horizontal rod of the portal frame is located near and above the grip of the operating handle.