JPS645663Y2 - - Google Patents

Description

[Detailed description of the invention] Conventionally, it has been known to use a chrysanthemum seat as a handle attachment device for walk-behind agricultural machines to adjust the height of the handle, but since the chrysanthemum seat is expensive, are connected by a series of horizontal pipes, a pair of left and right plates are fixed to this horizontal part, a horizontal groove is provided at the rear end of the handle frame, and the horizontal part of the base of the pipe is connected to the handle frame. Japanese Utility Model Publication No. 57-36531 proposed an attempt to improve the drawbacks of the chrysanthemum seat by engaging the groove and then attaching the front part of the plate to the handle frame using an adjustment rod.

However, the above idea has the disadvantage that it is difficult to bend the pipe at the base, which is the attachment part of the handle, resulting in high cost and uneven size.In addition, the process of forming a groove at the rear of the handle frame is troublesome and high cost. Moreover, machining errors are likely to occur in the horizontal portion of the pipe and the grooves in the handle frame, and the installed handle wobbles during work, impairing the sense of unity between the handle and the aircraft body. When attaching the handle to the handle frame or adjusting the height, the horizontal part is simply engaged with the groove, so if you release your hand, the handle will fall, so attach the adjustment rod to the plate and handle frame. I had to hold the hand handle with one hand until I could do it, and the work was extremely difficult.

The present invention is intended to improve the above-mentioned drawbacks, and is directed to a walk-behind agricultural machine in which the base of the hand handle is attached to the handle frame so that its angle can be adjusted. The middle part of the rod is welded and connected to the horizontal rod, and a plate is fixed to each base, a support hole is formed at one end of the plate and an adjustment hole is formed at the other end, and the handle frame is fixed to the handle frame. A fulcrum pin with both ends partially protruding outward is passed through and welded to one end side, and a receiving hole corresponding to the adjustment hole is provided in the front part of the handle frame, and the protruding length of the fulcrum pin is determined by the support of the plate. The support hole is made shorter than the depth of the hole and is fitted to each end of the fulcrum pin, and the adjustment rod is inserted into the receiving hole of the handle frame and the adjustment hole of the plate and attached. It is.

The embodiments shown in the drawings will be explained below.
1 is a transmission case with a support frame 2 attached to the front and a mounting bracket 3 attached to the rear, an engine 4 is mounted on the support frame 2, and a wheel or tiller is mounted on the shaft 5 at the bottom of the transmission case 1. , attaching and detaching weeding machines and other various work equipment,
A handle frame 6 is attached to the upper part with a mounting bolt 7 so that it can be rotated back and forth.

The hand handle 8 is integrally constructed by welding the intermediate portions of a pair of left and right handle rods 9, 9 to both ends of a horizontal rod 10, and plate rods 11, 11 are provided at the bases of the handle rods 9, 9, respectively. welded, and a support hole 1 is formed near one end of those plates 11, 11.
2 and 12, and adjustment holes 13 and 13 are formed near the other end and are formed by providing three tapered receiving portions on the outside of a long hole centered on the support hole 12.

Further, the handle frame 6 is constituted by a hollow body made of iron plate, and near one end thereof, a fulcrum pin 14 for reinforcing the handle frame 6 is passed through and welded on the inner surface, and both ends of the fulcrum pin 14 are welded. A part of the handle frame 6 is made to protrude outside, and the protruding ends are fitted with the support holes 12, 12 of the plates 11, 11, and the other end of the handle frame 6 is provided with a receiving hole that corresponds to the adjustment hole 13, 13. Holes 15, 15 are bored.

16 is an adjustment rod having a tapered receiving surface 17 at the base and a screw 18 at the tip side;
The nut 19 screwed into the handle frame 6 has a tapered portion that fits into the receiving surface and a hole 20 drilled in the handle frame 6.
It is provided with a stopper 21 that engages with.

When attaching the above-mentioned hand handle 8 to the handle frame 6, open the tips of the handle rods 9, 9 slightly and fit the support holes 12, 12 into the protruding parts of the fulcrum pins 14. The handle 8 is supported by a fulcrum pin 14,
In this state, set the hand handle 8 to the desired height,
Next, the adjustment rod 16 is inserted into the adjustment hole 13 and the receiving hole 15, and the nut 19 is screwed together, and the grip portion 16a of the adjustment rod 16 is rotated by hand to tighten it.

In addition, when adjusting the height of the hand handle 8 with the hand handle 8 attached to the handle frame 6, loosen the adjustment rod 16, set the height of the hand handle 8, and then turn the adjustment rod 16 to tighten it. .

When working with the hand handle 8 attached to the handle frame 6 in this way, the plate 1
The other ends of 1 and 11 are securely fastened so they do not move, and the one end is in a constant position because the fulcrum pin 14 and the support hole 12 are fitted together so that they will not be deformed during the manufacturing process. The fulcrum pin 14 supports the plates 11, 11 and also reinforces the handle frame 6, so the handle frame 6
Even if it is made of a thin iron plate, the hand handle 8 can be firmly supported.

As described above, the present invention is a walking type agricultural machine in which the base of the hand handle is attached to the handle frame so that the angle can be adjusted. A plate is fixed to each base, a support hole is formed at one end of the plate, an adjustment hole is formed at the other end, and a fulcrum with both ends partially projecting outward is provided at one end of the handle frame. A receiving hole corresponding to the adjustment hole is provided in the front part of the handle frame, and the protruding length of the fulcrum pin is made shorter than the depth of the support hole of the plate, so that the support hole is connected to the fulcrum pin. The adjustment rod was inserted into the handle frame's receiving hole and the adjustment hole of the plate, and the adjustment rod was inserted into the handle frame's receiving hole and the plate's adjustment hole. However, there is no need to bend the base of the hand handle or provide grooves on the end face of the handle frame, so manufacturing costs can be reduced.

In addition, the fulcrum pin can be of a fixed diameter, and the dimensional error is extremely small when the support hole is drilled with a drilling machine. The hand handle can be operated reliably without wobbling.

In addition, the fulcrum pin can reinforce the rotating fulcrum portion of the handle frame and support the handle, thereby allowing the handle frame to be made of a thin iron plate and firmly supporting the handle.

Furthermore, when attaching the hand handle to the handle frame, simply open the base of the hand handle slightly and fit it into the fulcrum pin, and the fulcrum pin will support the hand handle, allowing the adjustment rod to be inserted into the hole in the handle frame and plate. There is no need to support the handle at hand when doing so, and the handle at hand can be safely, easily, and quickly attached to the handle frame.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention,
Figure 1 is a side view of the walking agricultural machine, Figure 2 is a back view of the hand handle, Figure 3 is a side view of the plate, Figure 4
The figure is a plan view of the main part, and FIG. 5 is a side view of the same. 6... Handle frame, 8... Hand handle, 11... Plate, 12... Support hole, 13...
... Adjustment hole, 14 ... Fulcrum pin, 15 ... Receiving hole, 1
6...Adjustment rod.

Claims (1)

[Scope of utility model registration request] In a walk-behind agricultural machine in which the base of a hand handle is attached to a handle frame so that its angle can be adjusted, the middle parts of a pair of left and right handle rods constituting the hand handle are connected by welding to the horizontal rod, and a plate is fixed to each base. , a support hole is formed at one end of the plate and an adjustment hole is formed at the other end, and a fulcrum pin whose both ends partially protrude outward is passed through and welded to one end of the handle frame. , a receiving hole corresponding to the adjustment hole is provided in the front part of the handle frame, and the protruding length of the fulcrum pin is made shorter than the depth of the support hole of the plate, and the support hole is fitted to the end of the fulcrum pin, respectively. A handle attachment device for a walk-behind agricultural machine, characterized in that an adjustment rod is inserted through a receiving hole in a handle frame and an adjustment hole in a plate.