JPH06305453A - Handle fitting device for hand tractor - Google Patents

Abstract

PURPOSE:To make the handle fitting/removing structure of a hand tractor simple and high in rigidity. CONSTITUTION:Lateral handle brackets 4 with individual handles are fitted to a handle frame 2. Each handle bracket 4 having a side face plate 7, an upper face plate 10 and a rear face plate 12 is formed into case shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handle attachment device for a hand tractor. It can be used for management work machines such as cultivators and weeders.

[0002]

2. Description of the Related Art The handle of a hand tractor has a symmetrical shape,
It is detachably attached to the handle frame,
The handle height can be adjusted freely, but it is required that the handle be simple in construction and easy to attach and detach, but high in rigidity.

[0003]

According to the present invention, a pair of left and right handle brackets 3 and 4 which are attached to and detached from the rear end of the handle frame 2 attached to the body 1 are provided on both side surfaces of the handle frame 2. In addition, side plates 7 and 8 pivotally supported around the horizontal shaft 5 and whose vertical rotation positions are adjusted and fixed by lock bolts 6, and the rear portions of the side plates 7 and 8 are protruded toward opposite sides to both left and right sides. From one side of the connecting plate 13 which is formed in a case shape by the upper surface plates 9 and 10 and the rear surface plates 11 and 12 which join the edges from the upper surface plate 9 and the left and right upper surface plates 9 and 10. Welded to the other side and tightening bolt 1 on the other side
The handle attachment device of the hand tractor is characterized in that it is fixed by tightening at 4.

[0004]

In order to attach / detach the left and right handles to / from the handle frame 2, the handlebars 3 and 4 having the handles are attached / detached by the horizontal shaft 5 and the lock bolt 6. The fastening bolts 14 may be used to connect and separate the left and right handle brackets 3 and 4. Moreover, when the handle brackets 3 and 4 are attached, the attachment angle can be changed by the lock bolt 6 as a left and right unit.

In such a mounting structure of the handle brackets 3 and 4, the side plates 7 and 8 having the handles are reinforced by the upper and lower plates 9 and 10 and the rear plates 11 and 12 joined to each other by the connecting plate 13. Since they are connected in a case type, the mounting support of the handle is stable and the structure can be simplified.

[0006]

[Embodiment] The machine body 1 is mainly composed of a transmission case.
The front part has a frame 15 on which the engine E is mounted, and the shafts of the rotary frame soil claws 17 are attached to the wheel shafts 16 on the left and right sides at the lower end of the transmission case so that the medium tillage weeding work can be performed. Reference numeral 18 denotes a stand that is pivotally supported 19 at the front end of the frame 15 so as to be rotatable back and forth. The stand 18 is provided so as to be erected by a toggle spring 20 with respect to the frame 15. Two
The left and right shoulders 22 of 1 are brought into contact with each other to stop the forward rotation.

Reference numeral 23 is a shaft of the engine E, 24 is an input shaft at the upper portion of the transmission case, 25 is a belt which is laid between the pulleys of the shafts 23 and 24 for transmission, and 26 is a work hitch at the rear portion of the transmission case. A handle bracket 27 for attaching and detaching the handle frame 2 is attached to the upper side of the machine body 1, and a base portion of the handle frame 2 is attached to the upper side so as to be freely transferable back and forth and detachably. At the base end of the handle frame 2,
A parallel mounting plate 28 is fixed to the upper surface of the handle bracket 27, and the transfer shaft 2 in the vertical direction is fixed to the center of the mounting plate 28.
9 is fitted into the shaft hole of the handle bracket 27, and the lower side is retained by the nut 30.

On the upper side of the mounting plate 28, there is provided a lock pin 33 which is vertically movable in a cover 31 and is tensioned downward by a spring 32, and the lower end portion of the lock pin 33 is separated from the mounting plate 28. By fitting the lock hole 34 provided in the handle bracket 27, the direction of the handle frame 2 can be fixed. 35 is a lock pin 33
Is an operation knob at the upper end of the handle 32. The handle knob 2 can be freely rotated by pulling it up against the spring 32 to release the handle frame 2. When the operation knob 35 is released, the lock pin 33 is released by the spring 32. The selected lock hole 34 can be engaged. A gear lever 36 is provided on the side of the machine body 1.

The handle frame 2 has a circular pipe cross-section, but the rear end portion has a flat surface on both left and right sides, and the handle brackets 7 and 8 are superposed on the left and right side surfaces to form a horizontal shaft 5. , And lock bolt 6 to stop. The handles 37 and 38 are provided at the rear portions of the handle brackets 7 and 8 so as to project outward and rearward, and are integrated with the side plate portions 7 and 8 by welding.

These side surface 2 plates 7 and 8 form upper surface plates 9 and 10 and rear surface plates 11 and 12 at their rear portions, and their opposing edges A are joined on the longitudinal center line B of the handle frame 2. It The connecting plate 13 can be welded and integrated on the left side upper plate 9, and the right end side of the connecting plate 13 can be positioned on the right side upper plate 10 for polymerization. In addition, a bolt hole through which the tightening bolt 14 can be inserted is formed between the connecting plate 13 and the lower upper plate 10, and the bolt 39 is screwed into a nut 39 that can be fixed to the lower side of the upper plate 10 so as to be left and right. The handle brackets 3 and 4 are connected.

The side plates 7 and 8 are pivotally supported by the horizontal shaft 5. A washer 40 is applied to the left side of the side plate 5 and a nut 41 is attached to the right side.
It can be tightened with. Also, the lock bolt 6 is
The vertical movement of the handles 37, 38 is stopped by inserting the bolts through the bolt holes formed in front of the horizontal shaft 5 and extending from the side plates 7, 8 to the handle frame 2. The side plates 7 and 8 are provided with a plurality of adjusting holes 42 on an arc line centered on the horizontal axis 5. By selecting the adjusting holes 42 and inserting the lock bolt 6, the handles 37 and 38 are inserted. The mounting height of can be adjusted.

The left end of the lock bolt 6 can be fitted with the front end of the washer 40 and can be tightened with a nut 43 from the outside. Reference numeral 44 is a handle for turning the lock bolt 6. Reference numeral 45 is a cover that covers the upper side of such a handle mounting portion, and can be fastened with a bolt 47 to a bracket 46 welded to the handle frame 2.

5 and 6 are different from the above example in that
The frame 15 is mounted so as to sandwich the machine body 1 as a transmission case from both left and right sides, and a square pipe-shaped mounting pipe 48 is interposed on the front side of the frame 1 to attach the bolt 4 to the front and rear.
It is fixed by inserting 9, 50, and a loop-shaped bumper 51, a wheel arm 54 having a rotatable front wheel 52 pivotally supported 53, and the like are attached to the front portion of the mounting pipe 48.

The bumper 51 is integrally formed by welding or the like, but the wheel arm 54 can be vertically rotated about the arm shaft 55 and can be switched between the lower grounding position and the upper position by inserting and removing the pin. Further, the rear end of the frame 15 has a hitch 26 so that a working tool such as a resistance rod 57 can be attached.

The handle frame 2 is mounted between the handle bracket 27 and the mounting plate 28 by bolts 58 so that the direction of the handle frame 2 can be changed.

[Brief description of drawings]

FIG. 1 is a side view of a handle frame portion.

FIG. 2 is a plan view thereof.

FIG. 3 is a side view of the whole.

FIG. 4 is a side view of a part thereof.

FIG. 5 is a side view of another embodiment.

FIG. 6 is a plan view of a part thereof.

[Explanation of symbols]

 1 Airframe 2 Handle frame 3 Handle bracket 4 Handle bracket 5 Horizontal shaft 6 Lock bolt 7 Side plate 8 Side plate 9 Top plate 10 Top plate 11 Rear plate 12 Rear plate 13 Connecting plate 14 Tightening bolt

Claims (1)

[Claims] 1. A pair of left and right handle brackets 3, 4 attached to and detached from a rear end portion of a handle frame 2 attached to the side of the machine body 1 are pivoted about a horizontal axis 5 along both left and right side faces of the handle frame 2. Side plates 7 and 8 which are supported and whose vertical rotation position is adjusted and fixed by a lock bolt 6, and an upper surface plate which is formed by projecting rear portions of the side plates 7 and 8 toward opposite sides and joining edges from both left and right sides. One side of the connecting plate 13 formed into a case shape by the rear side plates 11 and 12 and overlapping between the left and right upper side plates 9 and 10 is welded to the upper side plate 9 and the other side is tightened. A handle attachment device for a hand tractor, characterized in that it is tightened and fixed with an attached bolt 14.