JP3499757B2 - Cabin skeletal components of the swinging machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cabin skeleton constituting member of an excavating work machine (swing work machine) such as a backhoe.

[0002]

2. Description of the Related Art There is a turning work machine such as a backhoe equipped with a cabin surrounding a driving operation part, and there is a cabin equipped with a front window movably from the front of the cabin along the ceiling of the cabin. When the front window is movably attached, the skeleton component of the cabin is
In order to mount the front window movably, it is necessary to form rail portions on the left and right sides of the front support column and the transverse beams connected to the upper part of the front support column and extending in the front-rear direction.

For this reason, FIG.
The one shown in was adopted. Member 10 of FIG. 12 (A)
0 is two members 101, 102 made by press-molding a metal material.
And the tongue pieces 101A, 1 of the two members 101, 102
02A is spot-welded 103 to form a rail portion 104 on one member (see, for example, JP-A-8-29).
See FIG. 4 of Japanese Patent No. 1537, hereinafter referred to as Conventional Example 1).

The member 200 shown in FIG. 12B is formed by drawing a metal material to form a deformed pipe 201.
The rail member is formed by welding the channel member 202 with a lip to the flat surface of No. 1 and the L-shaped member 203 is welded to form a weather strip or the like (hereinafter referred to as a conventional example 2).

[0005]

In the conventional example 1, since two members are press-molded, the die cost is large and one product is uniform. Further, since it is spot-welded, rainwater or the like is likely to enter through the tongue pieces 101A and 102A, and there is a possibility that welding distortion may occur when wire welding is performed instead of spot welding.

Further, since only two members are welded, the rigidity is low (there is a crack in the welded portion). On the other hand, the conventional example 2 adopts the deformed pipe 201, so that the rigidity can be maintained with a closed cross section, but the channel member 202 and the L-shaped member 203 have to be separately welded, and the processing cost is high. In addition to being bulky, there was a risk of welding distortion.

An object of the present invention is to provide a cabin skeleton constituting material that solves the above-mentioned problems of the conventional example.

[0008]

According to the present invention, a rail 31 is provided on each of front columns 8L and 8R of a cabin 7 and transverse beams 18L and 18R which are continuously provided on the front columns 8L and 8R and extend in the front-rear direction.
L, 31R, 32L, 32R are formed, and the rail 31
In the swivel work machine in which the front window 20 of the cabin 7 is movable along the L, 31R, 32L, and 32R, the following technical measures are taken to achieve the above object.

[0009] In other words, before Symbol front post 8L and the cross beam 18L
Has a first flat surface portion 35A and a second flat surface portion 35B which intersect and are connected to each other.
5B is formed by a deformed pipe material 35E that connects the curved surface portion 35C with each other to form a deformed space 35D in cross section.
The deformed space 3 is provided on either one of the plane portions 35A and 35B.
The rail portion 35F bulging in 5D is integrally formed along the longitudinal direction of the pipe material.

By adopting such a configuration,
The deformed pipe material 35E has a closed cross-section structure, which is a so-called seamless pipe material, and has improved rigidity, and the rail portion 35F acts as a rib to form a reinforcing structure. Therefore, the resistance that the front window 20 moves on the rail portion 35F becomes lighter. Further, the planar portion 35B that bulges form a rail portion 35F, located on either side of the rail portion 35F folded overlapping portion 35H, the 35G is formed to protrude from the flat portion 35B along the rail section 35F It is characterized by.

By adopting such a configuration,
The cooperative action of the folded overlapping portions 35G and 35H and the rail portion 35F significantly improves the rigidity of the constituent members, particularly, the torsional rigidity and the bending rigidity, and the folded overlapping portions 35H and 35H
With 35G, a weather strip or the like can be surely attached. Incidentally, skeletal component is preferably formed of a metal material by pulling the forming process.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. First, the outline of the swing working machine 1 with a cabin shown in the backhoe with reference to FIGS. 1 to 3 will be described. The revolving work machine 1 is provided with a revolving machine body 4 on a pair of left and right crawler traveling devices 2 via a revolving bearing 3 so as to be fully revolvable around a vertical axis XX.

An engine is mounted on a rear portion of the turning machine body 4, the engine 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 skeleton of the cabin 7 is mainly composed of a pair of left and right front columns 8L, 8R, a pair of left and right rear columns 9L, 9R, a left intermediate column 10, an upper ceiling frame 11 (see FIG. 10 and the like). The roof panel 12 is provided on the ceiling frame 11.

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

The left and right front columns 8L and 8R and the left and right lateral beams 18L and 18R connected to the upper portions of the left and right columns are provided with a front window 20 having a wiper device 19 between the positions where the front window is closed from the front closed state to the front opened. It was equipped so that it could move freely. The entrance / exit 21 is provided with an entrance / exit door 22, and the door 22 is openable / closable with a hinge 23 provided on the intermediate column 10 as a fulcrum, and 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 as a fulcrum, it can be freely engaged with and disengaged from the receiver 26 provided on the side wall of the cabin so as to maintain the fully opened posture.

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, the door 22 is considered to be well stored when the door 22 is maintained in the fully opened posture as shown in FIG. Further, a side window glass 27 is attached between the left side 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 door type window glass device 28 is provided between 9L, and the left and right rear columns 9 are provided.
A rear window glass 29 is attached between L and 9R.

As shown in FIG. 8, the roof panel 12 has an inner roof 12A which is erected in the left and right lateral beams 18L and 18R, and an outer roof 12C which is provided between the roof and the roof through a space 12B. A ceiling window glass 12D is mounted on the front side of the outer roof 12C, and a 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 columns 8L, 8R facing each other.
R is formed and connected to the rail portions 31L and 31R, the rail portions 32L and 32R are also formed on the left and right lateral beams 18L and 18R as shown in FIG. 8, and the roller 33 fitted to these rail portions is formed. The front window 20 is configured by the window glass 34 having the above. The operator grasps the handle 20A provided on the upper and lower sides of the front window 20, and the roller 33 holds the roller 33.
By rolling on L, 31R, 32L, 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 the phantom line in FIG. 5A. It is movable between the storage postures stored in the ceiling.

The front left column 8R and the left lateral beam 18R are formed by welding two members of the press-formed product to the rail portions 31R, 3R.
2R is formed, but the front right column 8L, the right lateral beam 18L,
That is, regarding the structural member 35 of the skeleton of the cabin 7,
It is made by drawing and forming a metal material. That is, as shown in FIGS. 7 and 11, the front support column 9L and the lateral beam 18L (hereinafter referred to as the constituent member 35) are
The first flat surface portion 35A and the second flat surface portion 35A which are connected to intersect each other.
A flat surface portion 35B, and first and second flat surface portions 35A, 35B
The cross-section irregular space 35 that is closed by connecting the curved portion 35C with the curved portion 35C.
Comprised of a deformed pipe material 35E for forming D, the first and second
One of the flat portions 35A and 35B, in the figure, the second flat portion 35B is integrally formed with a rail portion 35F that bulges into the space 35D along the longitudinal direction of the pipe material.

Here, the second plane portion 35B is reinforced by the rail portion 35F as shown in FIG. As shown in FIG. 7, the skeleton-constituting member 35 is framed with the curved portion 35C as an outward direction, and the folded overlapping portions 35G and 35H are located on both sides of the rail portion 35F and project from the flat portion along the rail portion 35F. It is molded, and the torsional rigidity and the flexural rigidity are enhanced here, and it is manufactured by a drawing forming process.

In FIG. 7, one of the folded overlapping portions 35G and 35H is used as a mounting portion of the weather strip 36 of the front glass 20, and the other overlapping portion 35H is a window frame 28A of the sliding door type window glass device 28. It is said to be a mounting part. However, regarding the horizontal 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.
It is used as a mounting portion for 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 the skeleton constituting member 35 is a connecting portion 38 exemplified by welding shown in FIG. 5 (A). In FIG. 5B, the rail portions 35F are connected to and connected (joined) to each other, and as shown in FIG. 5B, the roller cushions 39 are provided on the upper and lower ends 35F1 and 35F2 of the rail portions 35F of the component member 35 that becomes the front support column 8L. The upper and lower ends 35F1 and 35F2 are projected forward so as 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 holds the front glass 20 in a position where the front surface is closed by the front glass 20 and is stored in the upper ceiling portion. Has lock holes 40A and 40B that allow the lock pin 40 to be engaged and disengaged (see FIG. 5A). In addition, the horizontal beam 18
As shown in FIG. 6, cushioning members 41A and 41B made of an elastic material are attached to the front and rear of the rail portion 35F in L, and the temporary positioning member 42 is attached to the rear portion of the horizontal beam 18L.
The positioning body 42 has a lever 42B that swings around a fulcrum 42A. When the roller mounting bracket 37 passes through the engaging portion 42C of the lever 42B, the roller 33 contacts the buffer body 41B. The engaging portion 42C for contacting and aligning the lock pin 40 and the lock hole 40B
The bracket 37 is detachable from the bracket 37.

That is, the operator holds 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 to close the front glass 20 in the front closed posture (see FIG. Position A)) and horizontal beam 1
The posture can be changed to the posture (the position in FIG. 6) that is stored upward through 8L or the like, and in both postures, the roller 33 is elastically pressed against the cushioning bodies 41A, 41B, 39 and each lock is By engaging and disengaging the lock pin 40 in the holes 40A and 40B, the front glass 20 can be held in both posture positions.

In the above-mentioned embodiment, the roller 33 can be formed into a shoe shape.

[0025]

As described in detail above, since the skeleton-constituting member of the cabin for movably holding the windshield has the rail portion integrally formed with the deformed tube, the torsional and flexural rigidity can be improved and Then, the front glass could be moved accurately.

[Brief description of drawings]

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

FIG. 2 is a plan view of an essential part of FIG.

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

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

5 (A) is a view taken along the line P-P in FIG. 2, and FIG. 5 (B) is an enlarged view of a portion denoted by reference numeral 38.

FIG. 6 is a sectional view of the windshield when it is stored.

FIG. 7 is a plan cross-sectional view of the front glass in a closed posture.

FIG. 8 is a front cross-sectional view of the front glass when it is stored.

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

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

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

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

[Explanation of symbols]

7 cabins 8L front support (right) 8R front support (left) 18L right horizontal beam 18R Left cross beam 35 Components 35A First plan view 35B Second plan view 35C curved surface 35D space 35E Deformed tube 35F rail section

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshio Nasu 64, Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Factory Co., Ltd. Incorporated (72) Inventor Yoshio Sakuma 334-2 Naganuma-cho, Inage-ku, Chiba, Chiba Prefecture Ninomiya Sangyo Co., Ltd. (56) References: Kaihei 6-87462 (JP, U) Sankaihei 8-283 ( (58) Fields investigated (Int.Cl. ⁷ , DB name) E02F 9/16

Claims (2)

(57) [Claims] 1. A front column (8L) (8) of a cabin (7).
R) and a horizontal beam (18L) (18R) extending in the front-rear direction that is connected to the upper part of the rail (31L).
(31R) (32L) (32R ) is formed, and the rail (31L) (31R) (32L ) front window of the cabin along the (32R) (7) (20 ) are movable, the front The pillar (8L) and the lateral beam (18L) have a first flat surface portion (35A) and a second flat surface portion (35B) that intersect and are connected to each other, and the first and second flat surface portions (35A) (35A) (35).
B) is connected by the curved surface portion (35C) and the cross-section irregular shape space (3
5D) Deformed pipe material (35E) is used for seamless pipe material
Formed by drawing forming
Ri, said first and second flat section (35A) to one of (35B) is the rail section (35 bulges irregular space (35D)
F) is integrally formed along the longitudinal direction of the pipe material , and this rail
The flat part (35B) formed by bulging the part (35F)
Overlaid in a folded shape by drawing forming process
The folded back overlapped part protrudes along the rail part (35F)
Forms have cabins skeletal components of the swivel work machine according to claim Rukoto. 2. The rail part (35F) is sandwiched.
The rail of the second flat surface portion (35B) of the front support column (8L)
The folded and overlapped portion (35H) (3
5G) is formed, and one folded overlapped portion (35G)
The weather strip (36) on the windshield (20)
Attached and sliding door type window glass on the other folded overlap section (35H)
The window frame (28A) of the suspension device (28) is mounted, and the cabin skeleton constituting member of the swivel work machine according to claim 1.