JP2000096622A - Skeleton structure of cabin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture the skeleton structure of a cabin at low cost while securing its strength by forming the door side column, horizontal beams, and the like of a cabin main body by punching and bonding together two of inner and outer plates, and forming the other front column from a pipe. SOLUTION: This structure has a cabin main body 4 and a roof, the cabin main body 4 having a pair of right and left front columns 8 supporting front glass 6, a mid column 9 for placing a door 7 between the column 9 and the door side front column 8, and upper and lower horizontal beams connecting the front column 8 and the mid column 9 together at their respective upper and lower ends. The cabin main body 4 comprises a front column forming part 8A facing the door 7, a mid-column forming part 9A, and upper and lower horizontal beam forming parts, all of which are formed by punching the portions 17 of two of inner and outer plates 15, 16 corresponding to door placement spaces, expanding the remainders of the plates inward and outward and bonding them together, and the other front column 8 formed of a pipe.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame structure of a cabin used for a work vehicle such as a backhoe.

[0002]

2. Description of the Related Art For example, a frame structure of a cabin in a backhoe has a cabin main body and a roof, and the cabin main body has a door disposed between a pair of left and right front supports for supporting a front glass and one front support. Having a halfway support, upper and lower cross beams connecting the upper and lower ends of the one front support and the halfway support,
The left and right front struts of the cabin body are disclosed in JP-A-8-29153.
As disclosed in Japanese Patent Publication No. 7, the inner and outer two plate materials are formed by swelling inward and outward by press working and bonding.
The middle support and the rear support are also separately formed in the same structure, and are configured by connecting these supports with upper and lower horizontal beams.

[0003]

In the prior art, since each pillar and cross beam are individually pressed by two inner and outer plates, the material cost is reduced, but they must be welded to each other. Therefore, there is a problem that the manufacturing cost is high, and it is difficult to secure the strength while generating welding distortion and the like. It is also difficult to make roofs.

[0004] It is an object of the present invention to provide a frame structure of a cabin which can solve such a problem. According to the present invention, the support and the cross beam on the door side are
By punching and attaching a portion equivalent to the door arrangement space from the two plate materials and forming a front column formation portion, a halfway column formation portion, and a vertical beam formation portion on the door side, and forming the other front column with a tube material, An object of the present invention is to provide a frame structure of a cabin that can secure strength and can be manufactured at low cost.

According to the present invention, there is provided a frame structure of a cabin in which a horizontal member on the door side of a roof is formed by laminating and the other horizontal member is formed by a tube material, thereby ensuring strength and being manufactured at low cost. The purpose is to do.

[0006]

The first concrete means for solving the problems in the present invention is the cabin main body 4 and the roof 5
The cabin main body 4 includes a pair of left and right front supports 8 that support the front glass 6, an intermediate support 9 that arranges the door 7 between the front supports 8 on the door side, and a front support 8 on the door side. In the cabin having upper and lower cross beams 11 and 12 connecting the upper and lower ends of the intermediate support 9, the cabin main body 4 punches a door arrangement space equivalent 17 A from the inner and outer two plate members 15 and 16 and leaves the remaining portion inside and outside. Swell up and stick together, door 7
The front support column forming portion 8A, the intermediate support column forming portion 9A, and the upper and lower cross beam forming portions 11A and 12A are formed, and the other front support column 8 is formed of a tube material.

As a result, the inside and outside 2 bulged into the inside and outside are formed.
When the two plate members 15 and 16 are attached to each other, the front column forming section 8A, the intermediate column forming section 9A, and the vertical beam forming section 1 on the door 7 side are formed.
1A and 12A are integrally formed, and the other front support column 8 is easily formed of a tube material, and is extremely simple to manufacture and secures strength. A second specific means for solving the problem in the present invention has a cabin body 4 and a roof 5, and the cabin body 4 is curved so as to gradually recede from a lower portion to an upper portion, and supports the front glass 6. An intermediate support 9 for arranging the door 7 between the pair of left and right front supports 8 and the front support 8 on the door side;
It has a rear support 10 on which a rear glass 13 is arranged between the intermediate support 9 and upper and lower horizontal beams 11 and 12 connecting the front support 8 on the door 7 side, the intermediate support 9 and the upper and lower ends of the rear support 10. In the cabin, the cabin main body 4 punches a door arrangement space equivalent 17A and a rear glass arrangement space equivalent 17B from two inner and outer plate members 15 and 16 by press working, and swells the remaining portion inward and outward to be bonded. A front support forming portion 8A, an intermediate support forming portion 9A, a rear support forming portion 10A, and upper and lower cross beams forming portions 11A and 12A on the door 7 side are formed.
The other front support 8 is formed of a tube material.

Thus, even if the left and right front supports 8 are curved so as to gradually recede from the lower part to the upper part, when the two press-formed inner and outer plate members 15 and 16 which swell inward and outward are laminated, the door 7 is closed. The front support column forming portion 8A, the intermediate support column forming portion 9A, and the upper and lower cross beam forming portions 11A and 12A are integrally formed, and the other front support column 8 is easily formed of a tube material, and is extremely easy to manufacture and has high strength. Secured.

A third specific means for solving the problem in the present invention is to have a cabin main body 4 and a roof 5,
Are left and right lateral members 18 and 19, front and rear members 20 and 21 connecting front and rear ends of the left and right lateral members 18 and 19, and inner and outer roof members 22 attached to the left and right lateral members 18 and 19 and front and rear members 20 and 21; 23 and the horizontal member 18 on the door 7 side.
In the cabin, which is gradually widened from the front and rear ends to the middle part, the roof 5 has two plate members 24 inside and outside,
25 are swelled inward and outward and are attached to each other to form the horizontal member 1 on the door 7 side.
8 and the other transverse member 19 is formed of a tubular material.

Thus, the inside and outside 2 which are formed by bulging inside and outside are formed.
When the two plate members 24 and 25 are attached to each other, the horizontal member 1 on the door 7 side gradually widens from the front and rear ends to the middle part.
8 is formed simply, and the other transverse member 19 is also formed simply from a tube material, which is extremely simple to manufacture and secures strength. A fourth specific means for solving the problem in the present invention is that the cabin main body 4 has a roof 5 and the cabin main body 4 is curved so as to gradually recede from a lower portion to an upper portion and is openable upward. A pair of left and right front supports 8 supporting the glass 6,
An intermediate support 9 for arranging the door 7 with the front support 8 on the door side.
And upper and lower cross beams 11 and 12 for connecting the upper and lower ends of the front support 8 on the door side and the middle support 9, and the roof 5 has left and right horizontal members 18 and 19 and front and rear ends of the left and right horizontal members 18 and 19. The front and rear members 20 and 21 to be connected and the left and right horizontal members 18 and 19
And the inner and outer roof members 2 mounted on the front and rear members 20 and 21
2 and 23, the cabin body 4 is formed by punching 17A of a door arrangement space equivalent from the inner and outer two plate members 15 and 16 by press working, and swelling the remaining portion inward and outward to adhere to the door 7 side. Front support formation 8A
And the midway support column forming section 9A and the upper and lower cross beam forming sections 11A and 12A
And the other front support column 8 is formed of a tubular material, and the roof 5 swells the inner and outer two plate members 24 and 25 in and out to form a horizontal member 18 on the door 7 side. The lateral member 19 is formed of a tubular material, and the inner and outer plate materials 1 of the cabin main body 4 are formed.
The upper portions of the upper and lower members 5 and 16 and the lower portions of the inner and outer plates 24 and 25 of the roof 5 are fixed to each other, and the upper end of the tube material of the cabin body 4 is connected to the front end of the tube material of the roof 5. The rails 26, 2 for opening and closing the front glass 6 from the front closed position to the upper, substantially horizontal open position on the opposing surfaces of the inner plates 15, 24 of the horizontal member 18 and the tube member facing them.
7 is integrally formed.

When the two press-formed inner and outer plate members 15, 16, 24, and 25 are swelled inward and outward, the front strut forming portion 8A, the halfway strut forming portion 9A on the door 7 side, and the upper and lower cross beams are joined. The forming portions 11A and 12A are integrally formed, and the horizontal member 18 is also formed.
And the horizontal member 19 is easily formed of a tube material, and the mounting of the cabin main body 4 and the roof 5 and the formation of the rail portions 26 and 27 are also easy, so that the manufacture is extremely simple and the strength is secured.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 exemplify a backhoe 1 as a working vehicle, and the backhoe 1 has a cabin 2 mounted on a backhoe main unit 3. The backhoe machine 3 is a traveling body 3 having a crawler traveling device 31.
2, a swivel 33 is pivotably mounted, and a work unit 34 having a work implement such as a bucket at the end of the boom is mounted on the swivel 33. 2 shows a small backward turning type that is substantially within the range of the left and right outer ends of FIG.

A driver's seat 35, an engine, a hydraulic pump, a hydraulic oil tank 36, a control valve unit 37 and the like are mounted on the swivel base 33, 38 is a hood that can be opened and closed, 39 is a tank cover, and 40 is an engine cover. The driver's seat 35 has an engine cover 40
Supported above. The cabin 2 mounted on the swivel base 33 so as to surround the driver's seat 35 has a cabin main body 4 and a roof 5 roughly, and the cabin main body 4 is located on the front glass 6 on the front side and on the side opposite to the tank cover 39. Door 7 provided
And

The front surface of the cabin body 4 is curved so as to gradually recede from the lower part to the upper part.
Also has a curved shape (three-dimensional curved surface shape) in which the upper part is receded upward. In the following description, the left-right direction and the front-back direction are based on the driver sitting on the driver's seat 35.

The cabin main body 4 is curved so as to gradually recede from a lower portion to an upper portion, and a door 7 is provided between a pair of left and right front supports 8L and 8R for supporting the front glass 6 and a front support 8L on the door side. And the halfway support 9 for arranging the
10L of the left rear support column on which the rear glass 13 is disposed
, A rear support 10R that forms a right side wall 42 between the front support 8 on the right side, a front support 8L on the door 7 side, and an intermediate support 9
Upper and lower cross beams 11, 12 connecting the upper and lower ends of the rear support 10L
And

The front glass 6 is provided to open and close a front window formed in the upper half between the left and right front supports 8L and 8R, and can be moved rearward and upward to a storage position below the roof 5 so that the left and right front supports can be opened. The lower half between 8L and 8R is provided with a fitted lower front glass 43, the rear glass 13 is also fitted, and the right side wall portion 42 is pulled over the tank cover 39 to a portion above the tank cover 39. Is provided.

A rear glass 45 is provided between the left and right rear supports 10L and 10R, and the upper and lower ends of the right front support 8R and the rear support 10R are connected by vertical beams. 1 to 11, a front support 8R, an intermediate support 9L, a rear support 10L, an upper and lower cross beam 11, on the door 7 side (left side) of the cabin main body 4,
12 and the like are integrally formed of sheet metal.

That is, two inner and outer plate members 1 having substantially the same shape.
5 and 16 are stamped to form a door space 17A and a rear glass space 17B (FIGS. 4 and 1).
0), and the remaining portion is curved in an arc shape in plan view, and inward and outward (mainly the inner plate 15 inward and the outer plate 16 outward).
And the two plate members 15 and 16 are bonded to each other to form a hollow square member, and the front column forming portion 8A and the intermediate column forming portion 9 are formed.
A, rear strut forming portion 10A, and upper and lower cross beam forming portions 11A, 12
A, a front support 8R, an intermediate support 9L, and a rear support 10
L, upper and lower cross beams 11, 12 and the like.

The remaining portions of the two plate members 15 and 16 after punching have a three-dimensional curved shape in order to form a bulge and a retreat at the upper part of the front edge. However, the upper cross beam 11 has a substantially hollow rectangular shape in combination with the left horizontal member 18 of the roof 5, and the lower horizontal beam 12 embraces the square tubular material 51 or
In combination with No. 1, it has a substantially hollow square shape.

The plate members 15 and 16 are spot-welded at the bonded portion, and the periphery of the door arrangement space 17A and the rear glass arrangement space 17B is covered with a sealing material or the like. The rear glass 13 is fitted into the corresponding portion 17B, and a weather strip around the door 7 can be brought into contact with the periphery of the door arrangement space 17A.

The front support 8L on the door side is formed by a laminated plate and has a cross-sectionally irregular pipe shape. A groove-shaped rail 26 for guiding the front glass 6 is formed on the front glass 6 side. The front end and the rear end of the side form a double bonded portion. The intermediate support 9 and the rear support 10L have a rectangular tube shape, and the rear of the door 7 is pivotally supported on the intermediate support 9 via a pair of upper and lower pivotal supports 47 fixed to the outer surface.

The door 7 is attached to a glass plate 6a by pivots 47,
Necessary members such as a handle and a lock 48 and a striker 49 are directly fixed. A metal plate is attached to the inner surface of the glass plate 6a, and the necessary members are fixed to the metal plate. A frame may be provided, and necessary members may be mounted on the metal frame. 50 is striker 4
9 receivers.

The right front column 8R is formed by a curved deformed tube. This deformed pipe is formed by drawing a circular pipe material, forming the groove-shaped rail portion 26, and joining the front and rear ends of the rail portion 26 at the front and rear sides thereof by a forming process or the like.
a and 8b are formed, and the rail portion 26 is improved in hardness by bending in a U-shape, and the front and rear mating portions 8a and 8b have a double structure, so that the rail portion 26 can be reinforced. In addition, the front mating portion 8a serves as a contact surface of the front glass 6, and the rear mating portion 8b can also serve as a seal mounting portion of the draw glass 44.

The rear support 10R is formed by pressing and bonding two plates to form a mounting portion for the rear glass 45. The rear glass 45 mounting plate is fixed to a deformed pipe similar to the front support 8R. You may. The rear support 10R may be formed by punching out and bulging two plates in the same manner as the left rear support 10L and the upper and lower cross beams 11 and 12, and the right lower cross beam may be provided with a square tube member provided with a rail of a draw glass 45. Are located.

In FIGS. 1-3, 6, 7, 9, and 12, the roof 5 includes left and right horizontal members 18, 19 and the right and left horizontal members 18, 1
The front and rear members 20, 21 for connecting the front and rear ends of the front and rear members 9 and the inner and outer roof members 22, 23 attached to the left and right side members 18, 19 and the front and rear members 20, 21 are provided. It gradually becomes wider from the front and rear ends to the middle.

The left lateral member 18 on the door 7 side of the roof 5 is
While the inner surface is straight along the front-rear direction, the outer surface protrudes outward, which makes it difficult to form a tube. Therefore, the inner and outer two plate members 24 and 25 are braked and pressed. The inner plate 24 swells inward, and the width of the bottom wall 24a is formed wider in the middle part than the front and rear ends, and the outer plate 25 swells outward. Particularly, the roof 5 has a rounded shape, and the two plate members 24 and 25 are formed by joining the upper end portions of the plate members 15 and 16 and the outer roof member 23 therebetween.

On the other hand, since the right lateral member 19 is linear in the front-rear direction, a pipe material can be used, and a modified pipe having the same cross-sectional shape as the front support 8R is used. A part 27 is formed. The front end of the left lateral member 18 is joined to the upper end of the front support 8L, and the front glass 6
Left rail portion 2 with which the roller 62 of the second roller 62 is rotatably engaged.
6 and 27 are continuous, the front end of the right lateral member 19 is joined to the upper end of the front support 8R, and the right rail portions 26 and 27 are provided.
Are continuous, and the posture of the front glass 6 can be freely changed from a substantially vertical front closed posture to an upward substantially horizontal open posture.

The lower portion 26a of the rail portion 26 is gently inclined forward, and the upper end (the front end of the rail portion 27) 26b of the rail portion 26 projects slightly forward. The left and right front supports 8L around the glass 6,
8R and weather strip 52 attached to the front member 20 etc.
A cushion 53 is provided at a lower end and an upper end of the rail portion 26 and at a rear end of the rail portion 27 to cushion the collision of the roller 62 of the front glass 6.

The right front column 8R has a curved shape in which the upper portion is receded, and the horizontal member 19 is substantially straight, and can be formed by simply bending a deformed tube two-dimensionally, and bending one deformed tube. Thus, the front support 8R and the horizontal member 19 can be integrally formed. The outer roof member 23 and the outer plate 25 may be formed as a single plate, and the inner plate 24 may be fixed thereto.

The front part of the outer roof member 23 is cut out,
A skylight 46 is formed by fitting a transparent or translucent plastic plate. 2 to 6 and 12 to 15, the front glass 6 constitutes a front window device that opens and closes by moving up and down the upper half of the front surface of the cabin 2. The support bracket 61 is directly fixed to the four corners of the glass plate 6a,
Each of the support brackets 61 supports a support shaft 63 of a roller 62 that rolls in the rail portions 26 and 27. The wiper device 64 and the upper and lower opening / closing handles 65 are also glass plates 6a.
Is directly attached to.

Left and right support brackets 6 above the front glass 6
A support plate 66 and a support cylinder 67 are fixed to 1,
A lock member 68 formed of a pin is inserted into the support cylinder 67 so as to be slidable in the left-right direction. A handle 69 is attached to the lock member 68, and a U-shaped position setting groove 67 a for setting the left and right positions of the handle 69 is mounted on the support cylinder 67.
When the handle 69 is rotated in the left-right direction after being moved, the lock member 68 is restricted from moving in the left-right direction at the projected position or the immersed position.

The lock member 68 is movable right and left outward from the front glass 6 by moving in the axial direction with the handle 69, and an engaging member 70A having a hole for engaging with the lock member 68 is formed. , 70B are attached to the upper ends of the left and right front columns 8 and the rear ends of the left and right lateral members 18, 19, as shown in FIG. Therefore, the lock member 68 can be engaged with the engagement member 70A in a state where the front glass 6 is in the forward closed posture, the lock member 68 is detached from the engagement member 70A via the handle 69, and the handle 65 is held. The front glass 6 can be held in the closed posture by engaging the lock member 68 with the engagement member 70B in a state where the front glass 6 is lifted and the posture is changed to the open posture.

The left support bracket 61 of the front glass 6 or the support plate 66 fixed to the front glass 6 has a locking pin 71 projecting to the left outside, and a locking lever 72 engaged with the locking pin 71 is connected to the left lateral member 1.
8. The engaging lever 72 is rotatably supported via a shaft by a bracket 73 provided at the rear portion of the left lateral member 18, and is engaged with the engaging portion 72 on the opposite side to the grip portion 72 a.
b by means of an unillustrated coil spring or the like.
(4) It is urged clockwise and the stopper restricts clockwise rotation beyond the solid line state.

When the front glass 6 is moved to the open position and the locking member 68 reaches a position facing the hole of the engaging member 70B, the locking pin 71 pushes the locking lever 72 counterclockwise. Later, it engages with the engaging portion 72b on the rear side.
When the front glass 6 is in the open position, the roller 62 resiliently presses the cushion 53, so that the restoring force of the cushion 53 tries to shift the front glass 6 slightly forward from the regular open position. 72 engaging portion 72b
, The shift is prevented, the lock member 68 can be held at a position where it can be engaged with the engagement member 70B, and the engagement of the lock member 68 is facilitated.

The locking member 68 and the engaging member 70B and the like serve as a main locking means for the front glass 6, and the locking pin 71 and the locking lever 72 and the like serve as a temporary locking means, thereby connecting the front glass 6 to the rail portions 26 and 27. And a lock mechanism 74 that holds a forward closed posture and an upward open posture and restricts a change in posture. To release the lock mechanism 74 when the front glass 6 is in the open position, the lock member 68 is disengaged from the engaging member 70B via the handle 69, and the engaging lever 72 is rotated to lock the engaging portion 72b. Release from the pin 71. Then, the front glass 6 is displaced in the forward direction by the rebound of the cushion 53, and the locking pin 71 does not engage with the engaging portion 72b even if the hand is released from the engaging lever 72.

The present invention is not limited to the above embodiment, but can be variously modified. For example,
The cabin 2 can also be applied to a backhoe of a type other than the small backward turning type, a work vehicle other than the backhoe such as a tractor,
An air conditioner unit may be arranged between the inner and outer roof members 22 and 23. The right side wall portion 42 may be a fitting type glass instead of the pulling glass, and the door 7 may be a folding type that is bent in the front and rear halfway. Further, the front window device may be configured to open and close by pulling down the front glass 6 to the front side of the lower front glass 43.

[0037]

According to the present invention described in detail above, when two inner and outer plate members which are bulged inward and outward are attached to each other, the front column forming portion 8A and the intermediate column forming portion 9A on the door 7 side of the cabin body 4 are bonded. And the upper and lower cross beam forming portions 11A and 12A can be integrally formed, and the horizontal member 18 on the door 7 side of the roof 5 gradually widening from the front and rear ends to the middle portion can be easily formed. The front strut 8 and the lateral member 19 are also easily formed of a tube material, are extremely simple to manufacture, can secure strength, and can easily mount the cabin body 4 and the roof 5 and form the rail portions 26 and 27.

[Brief description of the drawings]

FIG. 1 is a side view of a backhoe showing an embodiment of the present invention.

FIG. 2 is a front view of the backhoe.

FIG. 3 is a plan view of the backhoe.

FIG. 4 is a sectional view taken along line XX of the cabin of FIG. 1 showing a main part of the present invention.

FIG. 5 is an enlarged sectional view of a front portion of the cabin.

FIG. 6 is a sectional view taken along line YY of FIG. 3;

FIG. 7 is a sectional view taken along the line ZZ of FIG. 3;

FIG. 8 is an enlarged sectional view of a door pivot.

9] A, B, C, D are W1, W2,
It is sectional drawing in the position of W3 and W4 line.

FIG. 10 is a side view of the cabin main body.

FIG. 11 is a sectional view taken along the line SS in FIG. 10;

FIG. 12 is a sectional view taken along line TT of FIG. 2;

FIG. 13 is a front view of the front glass.

FIG. 14 is a side view showing a lock mechanism of the front glass.

FIG. 15 is a partial cross-sectional front view of a lock mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Backhoe 2 Cabin 4 Cabin main body 5 Roof 6 Front glass 7 Door 8 Front support 8A Front support formation part 9 Intermediate support 9A Intermediate support formation part 10 Rear support 10A Rear support formation part 11 Upper cross beam 11A Upper cross beam formation part 12 Lower cross beam 12A Lower cross beam forming portion 13 Rear glass 15 Inner plate 16 Outer plate 18 Left lateral member 19 Right lateral member 20 Front member 21 Rear member 22 Inner roof member 23 Outer roof member 24 Inner plate 25 Outer plate 26 Rail portion 27 Rail portion

[Procedure amendment]

[Submission date] November 2, 1999 (1999.11.
2)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Frame structure of cabin

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame structure of a cabin used for a work vehicle such as a backhoe.

[0002]

2. Description of the Related Art For example, a frame structure of a cabin in a backhoe has a cabin main body and a roof, and the cabin main body has a door disposed between a pair of left and right front supports for supporting a front glass and one front support. Having a halfway support, upper and lower cross beams connecting the upper and lower ends of the one front support and the halfway support,
The left and right front struts of the cabin body are disclosed in JP-A-8-29153.
As disclosed in Japanese Patent Publication No. 7, the inner and outer two plate materials are formed by swelling inward and outward by press working and bonding.
The middle support and the rear support are also separately formed in the same structure, and are configured by connecting these supports with upper and lower horizontal beams.

[0003]

In the prior art, since each pillar and cross beam are individually pressed by two inner and outer plates, the material cost is reduced, but they must be welded to each other. Therefore, there is a problem that the manufacturing cost is high, and it is difficult to secure the strength while generating welding distortion and the like. It is also difficult to make roofs. An object of the present invention is to provide a framework structure of a cabin which can solve such a problem.

According to the present invention, a pillar and a cross beam on a door side are punched out from two large inner and outer plates corresponding to a door arrangement space, and are stuck together to form a front pillar forming part, a halfway pillar forming part, and a vertical cross beam forming part on the door side. It is an object of the present invention to provide a frame structure of a cabin that secures strength and can be manufactured at a low cost by forming the other front strut with a tube material. The present invention provides a frame structure of a cabin in which a horizontal member on a door side of a roof is formed by laminating and the other horizontal member is formed by a tube material, thereby ensuring strength and being able to be manufactured at low cost. Aim.

[0005]

The first concrete means for solving the problems in the present invention is the cabin main body 4 and the roof 5
The cabin main body 4 includes a pair of left and right front supports 8 that support the front glass 6, an intermediate support 9 that arranges the door 7 between the front supports 8 on the door side, and a front support 8 on the door side. In the cabin having upper and lower cross beams 11 and 12 connecting the upper and lower ends of the intermediate support 9, the cabin main body 4 punches a door arrangement space equivalent 17 A from the inner and outer two plate members 15 and 16 and leaves the remaining portion inside and outside. By swelling , the swelling forms the front strut forming portion 8A, the intermediate strut forming portion 9A, and the upper and lower cross beam forming portions 11A and 12A on the door 7 side, and the other front strut 8 is formed of a tube material. is there.

As a result, the inside and outside 2 bulged into the inside and outside are formed.
When the two plate members 15 and 16 are attached to each other, the front column forming section 8A, the intermediate column forming section 9A, and the vertical beam forming section 1 on the door 7 side are formed.
1A and 12A are integrally formed, and the other front support column 8 is easily formed of a tube material, and is extremely simple to manufacture and secures strength. A second specific means for solving the problem in the present invention has a cabin body 4 and a roof 5, and the cabin body 4 is curved so as to gradually recede from a lower portion to an upper portion, and supports the front glass 6. An intermediate support 9 for arranging the door 7 between the pair of left and right front supports 8 and the front support 8 on the door side;
It has a rear support 10 on which a rear glass 13 is arranged between the intermediate support 9 and upper and lower horizontal beams 11 and 12 connecting the front support 8 on the door 7 side, the intermediate support 9 and the upper and lower ends of the rear support 10. in the cabin, the cabin body 4, bulges door arrangement space equivalent punched 17A and a rear side glass configuration space equivalent 17B and the remainder by pressing the inner and outer plate members 15 and 16 in and out, the Rise Door 7 by exit
That is, the front support column forming portion 8A, the intermediate support column forming portion 9A, the rear support column forming portion 10A, and the upper and lower horizontal beam forming portions 11A and 12A are formed, and the other front support column 8 is formed of a pipe material.

Thus, even if the left and right front supports 8 are curved so as to gradually recede from the lower part to the upper part, when the two press-formed inner and outer plate members 15 and 16 which swell inward and outward are adhered to each other, the door 7 can be closed. The front support column forming portion 8A, the intermediate support column forming portion 9A, and the upper and lower cross beam forming portions 11A and 12A are integrally formed, and the other front support column 8 is easily formed of a tube material, and is extremely easy to manufacture and has high strength. Secured. A third concrete means for solving the problem in the present invention is that the cabin main body 4
And a roof 5. The roof 5 includes left and right lateral members 18 and 19 and front and rear members 2 connecting front and rear ends of the left and right lateral members 18 and 19.
0, 21; the left and right lateral members 18, 19;
In the cabin which has inner and outer roof members 22 and 23 attached to the doors 0 and 21 and in which the horizontal member 18 on the door 7 side is gradually widened from the front and rear ends to the middle,
Swells the two inner and outer plate members 24 and 25 inward and outward, and
Out by forming a transverse member 18 of the door 7 side is that which forms the other transverse member 19 by tubing.

As a result, the inner and outer 2 which are bulged and formed inward and outward are formed.
When the two plate members 24 and 25 are attached to each other, the horizontal member 1 on the door 7 side gradually widens from the front and rear ends to the middle part.
8 is formed simply, and the other transverse member 19 is also formed simply from a tube material, which is extremely simple to manufacture and secures strength. A fourth specific means for solving the problem in the present invention is that the cabin main body 4 has a roof 5 and the cabin main body 4 is curved so as to gradually recede from a lower portion to an upper portion and is openable upward. A pair of left and right front supports 8 supporting the glass 6,
An intermediate support 9 for arranging the door 7 with the front support 8 on the door side.
And upper and lower cross beams 11 and 12 for connecting the upper and lower ends of the front support 8 on the door side and the middle support 9, and the roof 5 has left and right horizontal members 18 and 19 and front and rear ends of the left and right horizontal members 18 and 19. The front and rear members 20 and 21 to be connected and the left and right horizontal members 18 and 19
And the inner and outer roof members 2 mounted on the front and rear members 20 and 21
2 and 23, the cabin main body 4 punches 17A corresponding to the door arrangement space from the two inner and outer plate members 15 and 16 by press working and swells the remaining portion in and out, and the swelling causes the door to swell. 7-side front support formation 8
A, the midway support formation section 9A, and the upper and lower cross beam formation sections 11A, 12
Forming a A, to form the other front support 8 in the tubing, the roof 5, come to bulge the inner and outer plate members 24 and 25 in and out
The lateral member 18 on the door 7 side is formed by bulging , and the other lateral member 19 is formed of a tube material. The upper members 15 and 16 of the cabin main body 4 and the lower members of the inner and outer plates 24 and 25 of the roof 5 are formed. And the upper end of the tube of the cabin body 4 and the front end of the tube of the roof 5 are connected to each other, and the front column forming portion 8 on the door 7 side
A rail section 2 for opening and closing the front glass 6 from the front closed position to the upper and substantially horizontal open position on the opposing surfaces of the inner plates 15 and 24 of the A and the horizontal member 18 and the tube member facing them.
6 and 27 are integrally formed.

When the two press-formed inner and outer plates 15, 16, 24, and 25 are swelled inward and outward, the front column forming portion 8 A, the intermediate column forming portion 9 A, and the upper and lower cross beams on the door 7 side are joined together. The forming portions 11A and 12A are integrally formed, and the horizontal member 18 is also formed.
And the horizontal member 19 is easily formed of a tube material, and the mounting of the cabin main body 4 and the roof 5 and the formation of the rail portions 26 and 27 are also easy, so that the manufacture is extremely simple and the strength is secured.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 exemplify a backhoe 1 as a working vehicle, and the backhoe 1 has a cabin 2 mounted on a backhoe main unit 3. The backhoe machine 3 is a traveling body 3 having a crawler traveling device 31.
2, a swivel 33 is pivotably mounted, and a work unit 34 having a work implement such as a bucket at the end of the boom is mounted on the swivel 33. 2 shows a small backward turning type that is substantially within the range of the left and right outer ends of FIG.

A driver's seat 35, an engine, a hydraulic pump, a hydraulic oil tank 36, a control valve unit 37 and the like are mounted on the swivel base 33, 38 is a hood that can be opened and closed, 39 is a tank cover, and 40 is an engine cover. The driver's seat 35 has an engine cover 40
Supported above. The cabin 2 mounted on the swivel base 33 so as to surround the driver's seat 35 has a cabin main body 4 and a roof 5 roughly, and the cabin main body 4 is located on the front glass 6 on the front side and on the side opposite to the tank cover 39. Door 7 provided
And

The front surface of the cabin main body 4 is curved so as to gradually recede from the lower part to the upper part.
Also has a curved shape (three-dimensional curved surface shape) in which the upper part is receded upward. In the following description, the left-right direction and the front-back direction are based on the driver sitting on the driver's seat 35. The cabin body 4 is curved so as to gradually recede from the lower part to the upper part, and arranges the door 7 between a pair of left and right front supports 8L and 8R that support the front glass 6 and the front support 8L on the door side. The rear support 10L, which forms the right side wall 42 between the middle support 9, the left rear support 10L on which the rear glass 13 is disposed between the half support 9 and the right front support 8.
R, a front support 8L on the door 7 side, an intermediate support 9 and upper and lower horizontal beams 11 and 12 connecting upper and lower ends of the rear support 10L.

The front glass 6 is provided to open and close a front window formed in the upper half between the left and right front supports 8L and 8R, and can be moved rearward and upward to a storage position below the roof 5 so that the left and right front supports can be opened. The lower half between 8L and 8R is provided with a fitted lower front glass 43, the rear glass 13 is also fitted, and the right side wall portion 42 is pulled over the tank cover 39 to a portion above the tank cover 39. Is provided. A rear glass 45 is provided between the left and right rear supports 10L and 10R, and the upper and lower ends of the right front support 8R and the rear support 10R are connected by vertical beams.

In FIG. 1 to FIG.
Front support 8R on the door 7 side (left side), intermediate support 9L,
The rear support 10L, the upper and lower cross beams 11, 12 and the like are integrally formed of sheet metal. That is, the two inner and outer plate members 15 and 16 having substantially the same shape are stamped to form a door arrangement space equivalent 17A and a rear glass arrangement space 17B by pressing.
10), and the remaining portion is curved in an arc shape in plan view,
In addition, it swells in the inward and outward directions (mainly the inner plate 15 inward and the outer plate 16 outward), and the swelled plate members 15 and 16 are bonded to form a hollow square member. The support post forming portion 9A, the rear support post forming portion 10A, and the upper and lower cross beam forming portions 11A and 12A are formed, and the front support 8R, the intermediate support 9
L, rear support 10L, upper and lower cross beams 11, 12 and the like.

The remaining portions of the two plate members 15 and 16 after punching have a three-dimensional curved shape in order to form a bulge and a retreat at the top of the front edge. However, the upper cross beam 11 has a substantially hollow rectangular shape in combination with the left horizontal member 18 of the roof 5, and the lower horizontal beam 12 embraces the square tubular material 51 or
In combination with No. 1, it has a substantially hollow square shape. The plate members 15 and 16 are spot-welded at the bonded portion, and the periphery of the door arrangement space equivalent 17A and the rear glass arrangement space equivalent 17B is covered with a sealing material or the like.
The rear glass 1 is provided in the rear glass arrangement space 17B.
3 is fitted, and a weather strip around the door 7 can be brought into contact with the periphery of the door arrangement space 17A.

The front support 8L on the door side is a laminated plate having a cross-sectionally irregular tube shape, and a groove-shaped rail portion 26 for guiding the front glass 6 is formed on the front glass 6 side. The front end and the rear end of the side form a double bonded portion. The intermediate support 9 and the rear support 10L have a rectangular tube shape, and the rear of the door 7 is pivotally supported on the intermediate support 9 via a pair of upper and lower pivotal supports 47 fixed to the outer surface. In this door 7, necessary members such as a pivotal support 47, a handle and a lock 48, a striker 49, and the like are directly fixed to a glass plate 6a. A metal plate is attached to the inner surface of the glass plate 6a, and the required The members may be fixed, or a metal frame may be provided around the glass plate 6a, and the necessary members may be mounted on the metal frame. 50 is a holder for the striker 49.

The right front column 8R is formed by a curved deformed tube. This deformed pipe is formed by drawing a circular pipe material, forming the groove-shaped rail portion 26, and joining the front and rear ends of the rail portion 26 at the front and rear sides thereof by a forming process or the like.
a and 8b are formed, and the rail portion 26 is improved in hardness by bending in a U-shape, and the front and rear mating portions 8a and 8b have a double structure, so that the rail portion 26 can be reinforced. In addition, the front mating portion 8a serves as a contact surface of the front glass 6, and the rear mating portion 8b can also serve as a seal mounting portion of the draw glass 44.

The rear support 10R is formed by pressing and bonding two plates to form a mounting portion for the rear glass 45. The rear glass 45 mounting plate is fixed to a deformed pipe similar to the front support 8R. You may. The rear support 10R may be formed by punching out and bulging two plates in the same manner as the left rear support 10L and the upper and lower cross beams 11 and 12, and the right lower cross beam may be provided with a square tube member provided with a rail of a draw glass 45. Are located. In FIGS. 1 to 3, 6, 7, 9 and 12, the roof 5 includes left and right horizontal members 18 and 19 and the left and right horizontal members 18 and 1.
The front and rear members 20, 21 for connecting the front and rear ends of the front and rear members 9 and the inner and outer roof members 22, 23 attached to the left and right side members 18, 19 and the front and rear members 20, 21 are provided. It gradually becomes wider from the front and rear ends to the middle.

The left lateral member 18 on the door 7 side of the roof 5 is
While the inner surface is straight along the front-rear direction, the outer surface protrudes outward, which makes it difficult to form a tube. Therefore, the inner and outer two plate members 24 and 25 are braked and pressed. The inner plate 24 swells inward, and the width of the bottom wall 24a is formed wider in the middle part than the front and rear ends, and the outer plate 25 swells outward. Particularly, the roof 5 has a rounded shape, and the two plate members 24 and 25 are formed by joining the upper end portions of the plate members 15 and 16 and the outer roof member 23 therebetween.

On the other hand, since the right lateral member 19 is linear in the front-rear direction, a pipe can be used, and a modified pipe having the same cross-sectional shape as the front support 8R is used. A part 27 is formed. The front end of the left lateral member 18 is joined to the upper end of the front support 8L, and the front glass 6
Left rail portion 2 with which the roller 62 of the second roller 62 is rotatably engaged.
6 and 27 are continuous, the front end of the right lateral member 19 is joined to the upper end of the front support 8R, and the right rail portions 26 and 27 are provided.
Are continuous, and the posture of the front glass 6 can be freely changed from a substantially vertical front closed posture to an upward substantially horizontal open posture.

The lower portion 26a of the rail portion 26 is gently inclined forward, and the upper end 26b of the rail portion 26 (the front end of the rail portion 27) protrudes slightly forward. The left and right front supports 8L around the glass 6,
8R and weather strip 52 attached to the front member 20 etc.
A cushion 53 is provided at a lower end and an upper end of the rail portion 26 and at a rear end of the rail portion 27 to cushion the collision of the roller 62 of the front glass 6. The right front strut 8R has a curved shape in which the upper part is receded, the horizontal member 19 is substantially straight, and the deformed tube can be formed only by two-dimensionally curving, and one deformed tube is bent,
It is also possible to integrally form the front support 8R and the horizontal member 19.

It should be noted that the outer roof member 23 and the outer plate 25
It is also possible to form a single plate and fix the inner plate 24 to it. The front part of the outer roof member 23 is cut out, and a transparent or translucent plastic plate is fitted therein.
Are formed. 2 to 6 and 12 to 15, the front glass 6 constitutes a front window device that opens and closes by moving up and down the upper half of the front surface of the cabin 2. The support brackets 61 are directly fixed to the four corners of the glass plate 6a, and the support brackets 61 support the support shafts 63 of the rollers 62 that roll in the rails 26 and 27, respectively. The opening / closing handle 65 is also directly attached to the glass plate 6a.

Left and right support brackets 6 above the front glass 6
A support plate 66 and a support cylinder 67 are fixed to 1,
A lock member 68 formed of a pin is inserted into the support cylinder 67 so as to be slidable in the left-right direction. A handle 69 is attached to the lock member 68, and a U-shaped position setting groove 67 a for setting the left and right positions of the handle 69 is mounted on the support cylinder 67.
When the handle 69 is rotated in the left-right direction after being moved, the lock member 68 is restricted from moving in the left-right direction at the projected position or the immersed position.

The lock member 68 is movable right and left outward from the front glass 6 by moving in the axial direction with the handle 69, and an engaging member 70A having a hole for engaging with the lock member 68 is formed. , 70B are attached to the upper ends of the left and right front columns 8 and the rear ends of the left and right lateral members 18, 19, as shown in FIG. Therefore, the lock member 68 can be engaged with the engagement member 70A in a state where the front glass 6 is in the forward closed posture, the lock member 68 is detached from the engagement member 70A via the handle 69, and the handle 65 is held. The front glass 6 can be held in the closed posture by engaging the lock member 68 with the engagement member 70B in a state where the front glass 6 is lifted and the posture is changed to the open posture.

The left support bracket 61 of the front glass 6 or the support plate 66 fixed to the front glass 6 has a locking pin 71 projecting to the left outside.
8. The engaging lever 72 is rotatably supported via a shaft by a bracket 73 provided at the rear portion of the left lateral member 18, and is engaged with the engaging portion 72 on the opposite side to the grip portion 72 a.
b by means of an unillustrated coil spring or the like.
(4) It is urged clockwise and the stopper restricts clockwise rotation beyond the solid line state.

When the front glass 6 is moved to the open position and the locking member 68 reaches a position facing the hole of the engagement member 70B, the locking pin 71 pushes the locking lever 72 counterclockwise. Later, it engages with the engaging portion 72b on the rear side.
When the front glass 6 is in the open position, the roller 62 resiliently presses the cushion 53, so that the restoring force of the cushion 53 tries to shift the front glass 6 slightly forward from the regular open position. 72 engaging portion 72b
, The shift is prevented, the lock member 68 can be held at a position where it can be engaged with the engagement member 70B, and the engagement of the lock member 68 is facilitated.

The lock member 68 and the engaging member 70B and the like serve as the main locking means for the front glass 6, and the locking pin 71 and the locking lever 72 and the like serve as the temporary locking means, thereby connecting the front glass 6 to the rail portions 26 and 27. And a lock mechanism 74 that holds a forward closed posture and an upward open posture and restricts a change in posture. To release the lock mechanism 74 when the front glass 6 is in the open position, the lock member 68 is disengaged from the engaging member 70B via the handle 69, and the engaging lever 72 is rotated to lock the engaging portion 72b. Release from the pin 71. Then, the front glass 6 is displaced in the forward direction by the rebound of the cushion 53, and the locking pin 71 does not engage with the engaging portion 72b even if the hand is released from the engaging lever 72.

The present invention is not limited to the above embodiment, but can be variously modified. For example,
The cabin 2 can also be applied to a backhoe of a type other than the small backward turning type, a work vehicle other than the backhoe such as a tractor,
An air conditioner unit may be arranged between the inner and outer roof members 22 and 23. The right side wall portion 42 may be a fitting type glass instead of the pulling glass, and the door 7 may be a folding type that is bent in the front and rear halfway. Further, the front window device may be configured to open and close by pulling down the front glass 6 to the front side of the lower front glass 43.

[0029]

According to the present invention described in detail above, when two inner and outer plate members which are bulged inward and outward are attached to each other, the front column forming portion 8A and the intermediate column forming portion 9A on the door 7 side of the cabin body 4 are bonded. And the upper and lower cross beam forming portions 11A and 12A can be integrally formed, and the horizontal member 18 on the door 7 side of the roof 5 gradually widening from the front and rear ends to the middle portion can be easily formed. The front strut 8 and the lateral member 19 are also easily formed of a tube material, are extremely simple to manufacture, can secure strength, and can easily mount the cabin body 4 and the roof 5 and form the rail portions 26 and 27.

[Brief description of the drawings]

FIG. 1 is a side view of a backhoe showing an embodiment of the present invention.

FIG. 2 is a front view of the backhoe.

FIG. 3 is a plan view of the backhoe.

FIG. 4 is a sectional view taken along line XX of the cabin of FIG. 1 showing a main part of the present invention.

FIG. 5 is an enlarged sectional view of a front portion of the cabin.

FIG. 6 is a sectional view taken along line YY of FIG. 3;

FIG. 7 is a sectional view taken along the line ZZ of FIG. 3;

FIG. 8 is an enlarged sectional view of a door pivot.

9] A, B, C, D are W1, W2,
It is sectional drawing in the position of W3 and W4 line.

FIG. 10 is a side view of the cabin main body.

FIG. 11 is a sectional view taken along the line SS in FIG. 10;

FIG. 12 is a sectional view taken along line TT of FIG. 2;

FIG. 13 is a front view of the front glass.

FIG. 14 is a side view showing a lock mechanism of the front glass.

FIG. 15 is a partial cross-sectional front view of a lock mechanism.

[Description of Signs] 1 Backhoe 2 Cabin 4 Cabin body 5 Roof 6 Front glass 7 Door 8 Front support 8A Front support formation 9 Midway support 9A Midway support formation 10 Rear support 10A Rear support formation 11 Upper cross beam 11A Upper cross beam formation Part 12 Lower cross beam 12A Lower cross beam forming part 13 Rear glass 15 Inner plate 16 Outer plate 18 Left side member 19 Right side member 20 Front member 21 Rear member 22 Inner roof member 23 Outer roof member 24 Inner plate 25 Outer plate 26 Rail portion 27 Rail

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Nishio Nasu 64 Ishizukita-cho, Sakai City, Osaka Inside Kubota Sakai Plant (72) Inventor Etsuo Sasaki 334-2 Naganuma-machi, Inage-ku, Chiba-shi In-company (72) Inventor Yoshio Sakuma 334-2 Naganuma-cho, Inage-ku, Chiba-shi, Chiba F-term in Ninomiya Sangyo Co., Ltd. (reference) 2D015 EA02

Claims (4)

[Claims] 1. A cabin main body and a roof, wherein the cabin main body includes a pair of left and right front supports for supporting a front glass, an intermediate support that arranges a door between the front supports on a door side, and a door support on the door side. In a cabin having a front column and upper and lower cross beams connecting upper and lower ends of an intermediate column, the cabin main body is formed by punching a portion corresponding to a door arrangement space from two inner and outer plate materials and swelling the remaining portion in and out to bond the door. A frame structure of a cabin, wherein a front support column forming portion, a halfway support column forming portion, and upper and lower cross beam forming portions are formed on one side, and the other front column is formed of a tubular material. 2. A cabin main body and a roof, wherein the cabin main body is curved so as to gradually recede from a lower portion to an upper portion, and is provided between a pair of left and right front supports supporting the front glass and a front support on the door side. A cabin having an intermediate support for arranging a door at the rear end, a rear support for arranging a rear glass between the intermediate support, and a vertical beam connecting upper and lower ends of the front support, the intermediate support, and the rear support on the door side. In the above, the cabin main body is formed by stamping out a portion corresponding to a door arrangement space and a portion corresponding to a rear glass arrangement space from two inner and outer plate members by press working, and swelling the remaining portion in and out, and bonding them together. A frame structure for a cabin, comprising: a midway strut forming portion, a rear strut forming portion, and upper and lower cross beam forming portions, and the other front strut formed by a tubular material. 3. The vehicle has a cabin main body and a roof. The roof comprises a left and right lateral member, a front and rear member connecting the front and rear ends of the left and right lateral member, and an inner and outer roof member mounted on the left and right lateral member and the front and rear member. In a cabin in which the lateral member on the door side is gradually widened from the front and rear ends to the middle part, the roof forms a door-side lateral member by swelling and bonding two inner and outer plate members in and out, A frame structure for a cabin, wherein the other lateral member is formed of a tube material. 4. A cabin main body and a roof, wherein the cabin main body is curved so as to gradually recede from a lower portion to an upper portion and supports a pair of left and right front supports that support a front glass that can be opened upward. An intermediate support for arranging the door between the front support and a vertical beam connecting the upper and lower ends of the front support and the intermediate support on the door side, and the roof has left and right horizontal members and front and rear ends of the left and right horizontal members. In a cabin having front and rear members to be connected, and inner and outer roof members attached to the left and right lateral members and the front and rear members, the cabin main body is formed by stamping a portion corresponding to a door arrangement space from two inner and outer plates by press working and a remaining portion. Are bulged inward and outward to form a front column forming portion, an intermediate column forming portion, and an upper and lower cross beam forming portion on the door side, and the other front column is formed of a tubular material. Swelling in and out Together, a door-side horizontal member is formed, and the other horizontal member is formed of a tube. The front glass is connected to the front end of the tube, and the front glass is opened and closed from the front facing closed position to the substantially horizontal opening position on the facing surface of the front plate forming portion on the door side and the inner plate of the lateral member and the tube material facing them. A frame structure for a cabin, wherein a rail portion for causing the rail is integrally formed.