JPH0517355Y2 - - Google Patents

Description

[Detailed description of the invention] A. Purpose of the invention [Field of industrial application] The present invention relates to a control handle attachment device for a working machine such as a walk-behind power tiller.

[Conventional technology]

In the control handle attachment device for this type of work machine, the control handle can be adjusted in the vertical direction (i.e., height) according to the height of the operator, or can be flipped back and forth in a horizontal plane or left or right depending on the work situation. A device whose direction can be adjusted is known (see, for example, Japanese Utility Model Publication No. 44940/1983).

In the above-mentioned conventional device, a connecting member is provided between the base of the operating handle and the handle support frame, and the contact surface between the connecting member and the handle base is formed in a substantially arc shape, and the contact surface is provided with a connecting member for controlling the handle. An uneven strip is formed to prevent the handle from tilting in the vertical direction. Further, a chrysanthemum seat is provided between the connecting member and the handle support frame to prevent rotation of the handle in a horizontal plane. Then, at the center of the chrysanthemum seat, a bolt passing through the handle base, the connecting member, and the handle support frame is screwed into a nut that contacts the lower surface of the handle support frame through a spherical surface, and is tightened and fixed. By loosening the mounting bolt, the vertical inclination of the handle and its orientation in the horizontal plane can be adjusted.

[Problem that the invention attempts to solve]

However, with the conventional type described above, the direction of the control handle cannot be adjusted unless the mounting bolts are loosened considerably. In addition, the structure was complicated, leading to problems such as increased manufacturing costs.

The object of the present invention is to provide a handle mounting device with a simple structure that allows easy adjustment of the direction of the steering handle.

B. Structure of the invention [Means for solving the problem] The present invention has a handle support frame 2 provided at the rear upper part of the fuselage 1, and a front side portion 3 of the control handle 3.
A pair of upper and lower handle holders 4 and 5 that hold the handle 3 in a vertically adjustable manner with the handle 3 in between are provided so as to be rotatably adjustable in a horizontal plane via chrysanthemum seats 6 and 7,
Further, a positioning ring 11 is provided on the front horizontal side portion 3a of the handle 3 to abut on both left and right side surfaces of the holders 4 and 5 to prevent the handle 3 from shifting in the left and right direction. The holders 4 and 5 are fastened and fixed to the support frame 2 by means of mounting bolts 8 passing through them.

[Effect]

A positioning ring 11 is used to position the front side portion 3a of the operating handle 3 between the pair of upper and lower handle holders 4 and 5.
By tightening and fixing both holders 4 and 5 to the handle support frame 2 with mounting bolts 8 via the chrysanthemum seats 6 and 7, the control handle 3
The front horizontal side portion 3a of the handle holder 4 and 5 is held between the holders 4 and 5 to prevent vertical tilting and left/right displacement of the operating handle 3, and the chrysanthemum seats 6 and 7 prevent the handle holder 4 and the horizontal surface of the handle holder 4 and 5 from shifting. Rotation within the handle is prevented, and the control handle is positioned and held in a predetermined direction.

In addition, by loosening the mounting bolt 8, the clamping force of both handle holders 4 and 5 is reduced, and the tilt of the operating handle 3 can be adjusted in the vertical direction as shown by the chain line 3' in FIG. The engagement is released and the handle holders 4 and 5 are allowed to rotate in the horizontal plane, and the control handle 3 is reversed in the horizontal direction in the horizontal plane as shown by the chain line 3'' in FIG. 2, or in the left-right direction as desired. In particular, the vertical inclination of the operating handle can be adjusted by simply loosening the mounting bolt 8 slightly.

〔Example〕

The illustrated handle support frame 2 has a structure in which a tube extends diagonally upward at the rear of the aircraft body 1, and a chrysanthemum seat 6 is provided on the upper surface of the rear end of the support frame 2.
The attached nut 9 is fixed by welding or the like.

A cylindrical protrusion 9a is integrally formed in the upper part of the nut 9, and the lower holder 5 is rotatably fitted into the protrusion 9a. Further, the lower surface of the holder 5 is provided with a chrysanthemum seat 7 that engages with the chrysanthemum seat 6 of the nut 9.

The operating handle 3 is formed into a substantially U-shape in plan, and its front side portion 3a is rotatably fitted into arcuate grooves 4a and 5a formed in the upper and lower holders 4 and 5.

In the illustrated example, both the holders 4 and 5 are connected to a pair of bolts 10 and 1 at the rear of the horizontal side portion 3a.
0, but both holders 4 and 5 may be connected so as to be openable and closable by a horizontal shaft or the like.

The positioning rings 11 are integrally attached to the front side portions 3a of the handle 3 on the left and right sides of the handle holders 4 and 5 by welding or the like, and the rings 11 prevent the handle 3 from shifting in the left-right direction. Marks or the like for tilting the handle 3 in the vertical direction may be provided on the side surfaces of the ring 11 and the handle holders 4 and 5, if necessary.

The mounting bolt 8 passes through the centers of the holders 4, 5 and the chrysanthemum seats 6, 7 from above and is screwed into the nut 9, and its tightening force causes the front side portion 3a of the operating handle 3 to tighten. The handle 3 is held between the holders 4 and 5 to prevent it from tilting in the vertical direction, and the chrysanthemum seats 6 and 7 are engaged to prevent the handle 3 from rotating in a horizontal plane. is positioned and fixed in a predetermined direction. Reference numeral 12 denotes a rotary operation lever provided on the head of the mounting bolt 8 so that it can be raised and lowered freely;
3 is a spring washer for reducing the tightening torque of the mounting bolt 8.

C. Effect of the invention As described above, the present invention holds the operating handle 3 on the handle support frame 2 provided at the rear upper part of the aircraft body 1, with the front side part 3a of the operating handle 3 sandwiched therebetween, so that the handle 3 can be adjusted up and down. A pair of upper and lower handle holders 4, 5 are provided so as to be rotatable in a horizontal plane via chrysanthemum seats 6, 7, and the holders 4, 5 and chrysanthemum seats 6,
Since the holders 4 and 5 have been tightened and fixed to the support frame 2 by the mounting bolts 8 passing through the holes 7, the handle 3 can be tilted in the vertical direction by loosening the mounting bolts 8.
And the orientation within the horizontal plane can be adjusted, and in particular, the vertical inclination of the handle 3 can be easily adjusted by simply loosening the mounting bolt 8 slightly. Further, at this time, the positioning ring 11 provided on the front horizontal side portion 3a of the handle prevents the handle 3 from shifting in the left-right direction.

Further, the present invention has the advantage that the structure can be easily constructed without using a connecting member having concave and convex stripes or a nut with a spherical surface to restrict the vertical tilting of the handle as in the above-mentioned prior art.

[Brief explanation of drawings]

FIG. 1 is a side view of a walk-behind power cultivator to which the present invention is applied, FIG. 2 is an enlarged longitudinal cross-sectional view of a control handle attachment part, and FIG. 3 is a perspective view of the main parts. 1 is the fuselage body, 2 is a handle support frame, 3 is a control handle, 3a is a front side part, 4 and 5 are handle holders, 6 and 7 are chrysanthemum seats, 8 is a mounting bolt, 11
is a positioning ring.

Claims (1)

[Scope of utility model registration request] A pair of upper and lower handle holders that sandwich the front side of the control handle and hold the handle in a vertically adjustable manner are attached to the handle support frame provided at the rear upper part of the aircraft. A positioning ring is provided on the front horizontal side of the handle to prevent the handle from shifting in the left and right direction, and the holder is fixed by a mounting bolt that passes through the holder and the chrysanthemum seat. A work equipment control handle attachment device that is tightened and fixed to the support frame.