JPH09150756A - Cabin structure of traveling working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To machine a side frame of a cabin by using a continuous pipe material having the different section without connecting it by a connecting member of a corner part, by bending a bent part of a frame in a state where a relief groove extending along in the bending direction is recessed on the inner surface. SOLUTION: In molding of bent parts 65 of a frame 6, a receiving die 1 is brought in contact with that inner surface 62 side facing the bending direction, and bending is performed by bender processing in which a bending roll 70 is rotated along the shape of the outer surface 61 while being pressed and being brought in contact with it. A pointed or tapered projecting protrusion 7a is provided in the center part of the contact surface of the receiving die 1 into a circular shape, and a wrinkle as a striped recessed groove or a slit-like bent relief groove 66 is formed in the center part of the inner surface 62 in the bending direction. That is, in forming the bent parts 65 of the frame 6, the relief groove 66 is provided on the inner surface 62 side of bending while being bent in the bending direction. Accordingly, machining can be performed by a continuous different sectioned pipe material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cabin structure installed in a traveling working machine such as a combine or a tractor.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Utility Model Laid-Open No. 60-180684, a combine cabin is formed by forming a side frame using a pipe material having an irregular cross section (a pipe material having an eyebrow cross section). The configured cabin structure is already known, and the side frame using this pipe material is configured such that the side edge portion of the door or window frame is joined or fixed to the flat side surface portion of the recessed surface.

[0003]

However, in such a cabin, when the side frame having the cross-sectional shape is bent into a right angle and an acute angle, a large amount of distortion is likely to occur in the side surface portion of the irregular cross section. If the frame of the cabin is formed of a distorted pipe, there is a problem that the sealing performance between the pipe surface and the door deteriorates.

It is possible to minimize the distortion when using a pipe with a circular cross section, but for a pipe with an irregular cross section having an L-shaped or V-shaped concave surface to receive the door. Is quite large, and in order to avoid this, it was used by limiting its use to places where it can be bent into an obtuse angle. On the other hand, in the case of forming a side frame in a series having right-angled and acute-angled bent portions, as shown in FIG. 4, both sides are inserted through a corner block 6c made of a bent casting member having the same sectional shape. If the method of connecting the frame 6 to this and constructing the cabin is adopted, there is a problem that the weight is increased by the amount of the corner block and the configuration is complicated and the cost is increased.

[0005]

A cabin structure of a traveling work machine according to the present invention for solving the above-mentioned problems of the prior art is a frame of a cabin 3 installed in a control section 4 of the traveling work machine 1. In a cabin in which 6 is formed by bending a pipe material having an irregular cross-section, the bending portion 65 of the frame 6 is formed by bending the inner side surface 62 with a relief groove 66 formed along the bending direction. .

[0006]

Embodiments of the present invention will now be described with reference to the drawings. Reference numeral 1 denotes a combine shown as an embodiment of a traveling work machine, which supports a reaper 2 from the front on a machine base 1b having a crawler type traveling device 1a so as to be able to move up and down, and mounts a threshing unit 2a on the rear thereof. The control section 4 covered with the cabin 3 is installed on the side of these, the engine 5a covered with the engine cover 5 is placed below the control sheet 4a of the control section 4, and the grain is provided behind it. A Glen tank 2b for accommodating the above is arranged.

As shown in FIGS. 1 and 2, the cabin 3 has a front wall 3a, a rear wall 3b, a left wall 3c and a right wall 3d having windows.
Is formed into an integral box shape using the top plate (roof part) 3e and the left and right frames 6 and 6a, and the lower end of the box is formed into the machine base 1
The control frame 1c of b, the engine cover 5, and the control panel wall (not shown) on the left side are joined to each other and fixed to the machine base 1b.

The front wall 3a is joined to its notch in conformity with the shape of the control column 4b. The left wall 3c and the right wall 3d are provided with sliding window glass 30, 30 respectively. The right wall 3d is constituted by a door 32 having a window 31 formed by the window glasses 30, 30.
The outer peripheral edge of the frame is formed in the same shape as the frame 6, and its rear part is attached to the frame 6 so that the hinges 33 can be opened and closed from the front side through fulcrums.

Next, the manufacturing process of the frame 6 will be described. The frame 6 has a cross-sectional shape, as shown in FIG. 3, in which the left and right sides are formed in a rectangular shape along the length of the hollow cylinder. Recessed surface 60 to be the joint surface of the connecting member of
A deformed pipe (a kind of eyebrows pipe) which is formed in 60, and the outer surfaces 61 on both sides thereof are formed in an arcuate surface, and the inner surface 62 exposed in the cabin 3 is formed in two planes that are orthogonal to each other. As shown in FIG. 3A, the front portion forming the ceiling wall is bent at an acute angle θ and the rear portion is integrally bent at a substantially right angle α in a side view.

The process for forming the bent portion 65 of the frame 6 is as follows.
In this embodiment, as shown in FIG. 3 (C), the receiving mold 7 having the surfaces contacting the respective curved surfaces of the bending portion 65 is abutted on the inner surface 62 side facing the bending direction. Then, the bending roll 70 is rotated while pressing it along the shape of the outer side surface 61, and bending is performed easily and efficiently all at once by the bending process.

The receiving die 7 is provided with a sharp or tapered convex projection 7a in a circular arc shape at the center of its abutting surface so that a linear groove is formed in the central portion of the inner side surface 62. In other words, a type of wrinkle, or in some cases, a slit-shaped bending strain relief groove 66 is appropriately formed along the bending direction. That is, the frame 6 is a bent portion
When forming 65, the relief groove 66 is provided on the inner side 62 side of the bend.
Since it is bent while being provided in the bending direction, the stress generated during this bending can be concentrated and released in the escape groove 66. As a result, bending wrinkles that are about to be wavy on the surface of the inner side surface 62 are absorbed by using the escape grooves 66, and as a result, the inner surface of the inner side surface 62 is suppressed while suppressing the extreme cross-sectional deformation of the bent portion 65.
The surface of 62 can be finished cleanly and smoothly.

The left frame 6a is smaller in diameter and cross-sectional size than the right frame 6 so that the weight of the central portion (left side) of the machine body is reduced and the balance of the machine body is advantageously achieved. Bending is performed by the same processing means as described above. The pair of left and right frames 6 and 6a formed as described above is framed by the conventional connecting member 35 and the CFC glass part 36 to form the cabin 3. It should be noted that the window frame 37 and the door 32 are joined or abutted against each other through the seal members 38 and 39 that abut on the recessed surfaces 60 of the frames 6 and 6a.

[0013]

The present invention has the following effects. Claim 1
According to the invention of the above, in forming the bent portion of the frame,
Since the relief groove is recessed and formed along the bending direction on the inner side surface, the relief groove suppresses distortion of the bent portion, and the recessed surface can be largely bent with a good finish.

Therefore, the side frame of the cabin can be processed by using a series of pipe materials having different cross-sectional shapes without connecting the side frame of the cabin with connecting members at the corners, etc., so that it can be easily manufactured with an inexpensive structure. You can

[Brief description of the drawings]

FIG. 1 is a side view of a combine with a cabin of the present invention.

FIG. 2 is a plan sectional view of a cabin.

FIG. 3A is a perspective view of an upper portion of a cabin frame. (B) is a cross-sectional view of the frame. (C)
FIG. 6 is an explanatory diagram showing a method for processing a bent portion of a frame.

FIG. 4 is an exploded perspective view showing a conventional frame structure.

[Explanation of symbols]

1 combine (traveling work machine) 3 cabin 4 control section 6, 6a
Frame 60 Recessed surface 61 Outer surface 62 Inner surface 65 Bent portion 66 Relief groove

Front page continuation (72) Inventor Akihiro Nogami 667 Izamiyacho, Higashi Izumo-cho, Yatsuka-gun, Shimane Prefecture 1 Mitsubishi Agricultural Machinery Co., Ltd. Within Mitsubishi Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] 1. In a cabin in which a frame 6 of a cabin 3 installed in a control section 4 of a traveling work machine 1 is formed by bending with a pipe material having an irregular cross section, the bending portion 65 of the frame 6 is bent in an inner surface 62 thereof. A cabin structure for a traveling work machine, wherein the escape groove 66 is formed by bending in a state in which a relief groove 66 is formed.