JP2000096618A - Cabin skeleton structural member for revolving work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve torsional and flexural rigidity by forming the skeleton structural member of a cabin movably holding a front glass with a deformed pipe integrally molded with a rail section. SOLUTION: Two press moldings are welded to a front left support 8R and a left side beam to form a rail section 31R. A metal material is drawn to form a front right support 8L and a right side beam, i.e., the skeleton structural member 35 of a cabin. The front support and side beam, i.e., structural member 35, have a first plane section 35A and a second plane section 35B connected to cross each other, and the first and second plane sections 35A, 35B are connected by a curved section 35C to form a deformed pipe 35E having a deformed space 35D with a closed cross section. A rail section 35F expanded to the space 35D is integrally formed along the longitudinal direction of the pipe 35E on one of the first and second plane sections 35A, 35B, e.g. the second plane section 35B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cabin frame member of an excavator (turning machine) such as a backhoe.

[0002]

2. Description of the Related Art As a turning work machine such as a backhoe, there is a turning machine having a cabin surrounding an operation section. In this cabin, a front window is provided so as to be movable from a front surface of the cabin along a ceiling portion of the cabin. When the front window is movably mounted, the skeletal components of the cabin include:
In order to mount the front window movably, it is necessary to form a rail portion on the left and right sides of the front support and the cross beam extending in the front-rear direction connected to the upper part of the front support.

For this reason, FIG.
The following was adopted. Member 10 in FIG.
0 denotes two members 101 and 102 formed by pressing a metal material.
Tongue pieces 101A, 1 of the two members 101, 102
02A is spot-welded 103 to form a rail portion 104 on one member (for example, see Japanese Patent Application Laid-Open No. 8-29).
No. 1537, FIG. 4, hereinafter referred to as a conventional example 1).

[0004] A member 200 shown in FIG. 12B is formed by drawing a metal material to form a deformed tube 201.
A rail portion is formed by welding a lip-attached channel member 202 to the flat surface portion 1 and an attachment portion such as a weather strip is formed by welding an L-shaped member 203 (hereinafter referred to as a conventional example 2).

[0005]

In the conventional example 1, since two members are press-formed, the mold cost is bulky and uniform. In addition, since it is spot-welded, rainwater or the like easily enters from the tongue pieces 101A and 102A, and there is a possibility that welding distortion may occur when performing line welding instead of spot welding.

Further, since only two members are welded, the rigidity is low (there is a crack or the like from a welded portion). On the other hand, in the conventional example 2, since the modified pipe 201 is employed, the rigidity can be maintained as a closed cross section, but the channel material 202 and the L-shaped material 203 must be separately welded, and the processing cost is reduced. In addition to bulkiness, there was a possibility that welding distortion would occur.

[0007] An object of the present invention is to provide a cabin skeletal component which has solved the above-mentioned problems of the prior art.

[0008]

According to the present invention, a rail 31 is provided on each of front columns 8L and 8R of a cabin 7 and cross beams 18L and 18R which are connected to the upper portions thereof and extend in the front-rear direction.
L, 31R, 32L, 32R, and the rail 31
In order to achieve the above-mentioned object, the following technical measures are taken in the turning work machine in which the front window 20 of the cabin 7 is movable along L, 31R, 32L, 32R.

That is, in the present invention according to claim 1, the front column 8L and the cross beam 18L have a first plane portion 35A and a second plane portion 35B which are connected to each other so as to intersect with each other.
The first and second flat portions 35A and 35B are connected by a curved surface portion 35C to form a cross-sectionally shaped space 35D. The first and second flat portions 35A and 35B each include one of the deformed pipes 35E. Rail 35 bulging into irregular space 35D
F is formed integrally along the longitudinal direction of the tube.

By adopting such a configuration, the deformed tubular member 35E has a closed cross-sectional structure, is a so-called seamless tubular member, and has improved rigidity.
5F acts as a rib to form an enhanced structure. Therefore, the resistance of the front window 20 to move on the rail 35F is reduced. According to a second aspect of the present invention, in the first aspect, the flat portion 35B formed by bulging the rail portion 35F is provided with the folded portions 35H and 35G located on both sides of the rail portion 35F. Are formed so as to protrude from the plane portion 35B along the line.

By adopting such a configuration, the rigidity of the constituent members, especially the torsional rigidity and the flexural rigidity, are greatly improved by the cooperative action of the folded back portions 35G, 35H and the rail portion 35F. Polymerization section 35H, 3
With 5G, a weather strip or the like can be securely attached. In addition, it is desirable that the skeletal component according to claim 1 or 2 be formed by drawing a metal material.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. First, an outline of a turning work machine 1 with a cabin shown by a backhoe with reference to FIGS. 1 to 3 will be described. The turning work machine 1 is provided on a pair of left and right crawler traveling devices 2 via a turning bearing 3 so that a turning machine body 4 can fully turn around a vertical axis XX.

An engine is mounted in the rear part of the turning body 4 and is covered with a hood 5 having an opening / closing hood 5A, and a driver's seat 6 is provided on the hood 5. Cabin 7 surrounding driver's seat 6
The main structure of the cabin 7 is a pair of left and right front supports 8L and 8R, a pair of right and left rear supports 9L and 9R, a left intermediate support 10, an upper ceiling frame 11, and the like (see FIG. 10 and the like). The ceiling frame 11 is provided with a roof panel 12.

An excavator 14 having a bucket or the like via a bracket 13 or the like is provided so as to be vertically movable and swingable in front of the swivel table 4 and closer to the right side. As shown in FIG. 2, the cabin 7 has a right side wall 7A that is linear in the front-rear direction, and a left side wall 7B that has a box shape with a bulging outward shape. , A hydraulic oil tank 15 and a control valve 16 are arranged, and these are covered with a cover 17 that can be opened and closed.

The left and right front supports 8L, 8R and the left and right cross beams 18L, 18R connected to the upper portions thereof have a front window 20 having a wiper device 19 between a position where the front window 20 is retracted from the front closed state and the front window 20 is stored at the upper portion. It was provided as a mobile. The entrance 21 is provided with a door 22 which can be opened and closed with a hinge 23 provided on the intermediate support 10 as a fulcrum. The door 22 is provided with a door lock 24, a striker 25 and the like. Striker 25 is hinge 2
When fully rotated about the fulcrum 3, it can be freely engaged with and disengaged from a receiver 26 provided on the side wall of the cabin in order to maintain the fully open position.

The pivot 23A of the hinge 23 is shown in FIG.
By setting the door 22 at a position outside the side wall of the cabin 7, as shown in FIG. 10, when the door 22 is maintained in the fully open position as shown in FIG. A side window glass 27 is mounted between the left middle support 11 and the rear support 9R, and the front and rear right support 8L,
As shown in FIGS. 8 and 10, a sliding window type window glass device 28 is provided between the left and right rear supports 9R.
A rear window glass 29 is mounted between L and 9R.

As shown in FIG. 8, the roof panel 12 has an inner roof 12A installed between the left and right cross beams 18L and 18R, and an outer roof 12C installed between the inner roof 12A and the roof via a space 12B. A ceiling window glass 12D is mounted on the front side of the outer roof 12C, and the space 12B is a storage room for an air conditioner or the like. Rail portions 31L, 31 are provided on the inner surfaces of the left and right front supports 8L, 8R.
R are formed, and rail portions 32L and 32R are formed on the left and right cross beams 18L and 18R as shown in FIG. 8 and connected to the rail portions 31L and 31R, and the roller 33 fitted to the rail portions is formed. The front window 20 is constituted by a window glass 34 having a front surface 20. The front window 20 is gripped by an operator with a handle 20A provided on the upper and lower sides and the roller 33 is moved to the rail portion 31.
By rolling over L, 31R, 32L, and 32R, the front surface shown in FIG. 6 is opened from the front closed state shown in FIG. 5A through the intermediate posture 20B shown by a virtual line in FIG. It is movable between the storage positions stored in the ceiling.

The front left support 8R and the left cross beam 18R are formed by welding two members of a press-formed product to form rail portions 31R, 3R.
2R is formed, but front right support 8L, right cross beam 18L,
That is, regarding the constituent members 35 of the skeleton of the cabin 7,
It is made of a metal material that has been drawn and formed. That is, as shown in FIGS. 7 and 11, the front support 9L and the cross beam 18L (hereinafter, referred to as a component 35)
The first plane portion 35A and the second
The first and second flat portions 35A, 35B.
Is formed by a curved section 35C, and the closed space 35 is closed.
D is formed of a deformed tubular material 35E,
A rail 35F swelling in the space 35D is formed integrally with one of the flat portions 35A and 35B, in the drawing, in the second flat portion 35B along the longitudinal direction of the tube.

Here, the second flat portion 35B is reinforced by the rail portion 35F as shown in FIG. As shown in FIG. 7, the skeletal component 35 is framed with the curved portion 35C facing outward, and is positioned on both sides of the rail portion 35F so that the folded portions 35G and 35H protrude from the flat portion along the rail portion 35F. It is molded, and here, the torsional rigidity and the flexural rigidity are enhanced, and it is manufactured by drawing forming.

In FIG. 7, one of the folded overlapping portions 35G and 35H has the overlapping portion 35G as a mounting portion for the weather strip 36 of the front glass 20, and the other overlapping portion 35H has the window frame 28A of the sliding window glass device 28. The mounting part is. However, regarding the cross beam 18L, the overlapping portion 35G is the mounting portion of the inner roof 12A, and the overlapping portion 35H is the window frame 28.
A (see FIG. 8).

A roller 33 is rotatably mounted on a square portion of the front glass 20 via a roller mounting bracket 37, and a skeletal component 35 is connected to a connecting portion 38 exemplified by welding shown in FIG. 5B, the rail portions 35F are communicated and connected (joined), and as shown in FIG. 5 (B), the upper and lower ends 35F1 and 35F2 of the rail portions 35F of the constituent member 35 to be the front support 8L are provided with roller cushions 39. Are mounted, and upper and lower ends 35F1 and 35F2 are projected forward to elastically press the front glass 20 against the weather strip 36.

The roller mounting bracket 37 is provided with a lock pin 40 that can be inserted and removed so as to hold the front glass 20 at a position where the front glass is closed by the front glass 20 and at a position stored in the upper ceiling. The lock holes 40A and 40B are provided on the front and rear lower surfaces of the lock pin 40 so that the lock pin 40 can be freely engaged and disengaged (see FIG. 5A). In addition, cross beam 18
As shown in FIG. 6, shock absorbers 41A and 41B made of an elastic material are attached to the front and rear of the rail portion 35F at L, and a temporary fixing positioning member 42 is provided at the rear of the cross beam 18L.
The positioning body 42 has a lever 42B that swings about a fulcrum 42A. When the roller mounting bracket 37 passes through the engaging portion 42C of the lever 42B, the roller 33 comes into contact with the buffer 41B. The engaging portion 42C contacts the lock pin 40 and the lock hole 40B in contact with each other.
However, it is detachable from the bracket 37.

That is, the operator grasps the handle 20A of the front glass 20 and moves the glass 20 along the rail portion 35F through the rolling of the roller 33, thereby closing the front glass 20 in the front closed position (FIG. 5 ( A) position) and cross beam 1
The roller 33 can be elastically pressed against the shock absorbers 41A, 41B and 39 in both postures, and can be changed to the posture (the position shown in FIG. 6) which is stored upward through the 8L or the like. By engaging and disengaging the lock pins 40 with the holes 40A and 40B, the front glass 20 can be held in both posture positions.

In the above-described embodiment, the roller 33 can be formed in a shrunk shape.

[0025]

As described in detail above, the skeletal structural member of the cabin that movably holds the front glass has a rail portion integrally formed with the deformed pipe, so that it can be improved in twisting and bending rigidity, and can be extended. In other words, the front glass could be moved accurately.

[Brief description of the drawings]

FIG. 1 is a side view of a turning work machine.

FIG. 2 is a plan view of a main part of FIG.

FIG. 3 is a front view of a main part of FIG. 1;

FIG. 4 is a partial front view of the front glass.

5 (A) is a diagram showing a PP arrow in FIG. 2, and FIG. 5 (B) is an enlarged view of a portion indicated by reference numeral 38.

FIG. 6 is a sectional view when the front glass is stored.

FIG. 7 is a plan sectional view when the front glass is in a closed posture.

FIG. 8 is a front sectional view when the front glass is stored.

FIG. 9 is an enlarged plan view of a door hinge.

FIG. 10 is a plan view of a cabin skeleton.

FIG. 11 is a perspective view of a skeleton constituent member.

12A is a cross-sectional view of a conventional example 1 and FIG. 12B is a cross-sectional view of a conventional example 2.

[Explanation of symbols]

 7 Cabin 8L Front strut (right) 8R Front strut (left) 18L Right cross beam 18R Left cross beam 35 Component 35A First plan view 35B Second plan view 35C Curved surface 35D Space 35E Deformed tube 35F Rail

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuomi Sugiyama 64 Ishizukita-cho, Sakai City, Osaka Prefecture Inside the Kubota Sakai Factory (72) Inventor Yoshio Nasu 64 Ishizukitacho, Sakai City, Osaka Prefecture Kubota Sakai Co., Ltd. Inside the factory (72) Inventor Etsuo Sasaki Chiba Pref., Chiba Pref., Nagano-cho, Inage-ku 334-2 Ninomiya Sangyo Co., Ltd. (72) Inventor Yoshio Sakuma 334-2 Naganuma, Inage-ku, Chiba, Chiba Pref. (Reference) 2D015 EA02

Claims (3)

[Claims] 1. A front strut (8L) (8) of a cabin (7).
R) and the cross beams (18L) and (18R) extending in the front-rear direction, which are continuously provided on the upper portion, rails (31L).
(31R) (32L) (32R) are formed, and the front window (20) of the cabin (7) is movable along the rails (31L) (31R) (32L) (32R). The front column (8L) and the cross beam (18L) have a first plane portion (35A) and a second plane portion (35B) intersecting and connected to each other, and the first and second plane portions (35A). ) (35
B) is connected to the curved surface portion (35C) to form a cross-section irregular space (3
5D) is formed of a profiled tube (35E),
One of the first and second plane portions (35A) and (35B) has a rail portion (35) bulging into a deformed space (35D).
(F) is formed integrally along the longitudinal direction of the tube material, wherein the cabin framework member of the turning work machine is characterized in that: 2. A folded portion (35H) (35G) which is located on both sides of the rail portion (35F) is provided on the flat portion (35B) where the rail portion (35F) is bulged.
The cabin skeleton constituent member of a turning work machine according to claim 1, characterized in that it is formed so as to protrude from the flat portion (35B) along F). 3. The cabin framework component of a turning working machine, wherein the framework component according to claim 1 or 2 is formed by drawing a metal material.