JP2000185892A - Cab door structure of working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of component part items and shorten an assembly work time by eliminating an adjusting operation at the time of assembly. SOLUTION: A door frame 1 is provided in an opening part 90 of a cab main body 10, and a door frame 3 is assembled slide-openably into either of two grooves provided at the inner peripheral part of the door frame 1 so as to form a door, and a window is installed openably in the door frame 3. A door fixing means to prevent the door from rattling is installed on the door, and comprises a door fixing roller installed on the cab main body 10 and a plate which is installed on the door frame 3 and has a projected part which is brought in contact with the door fixing roller when the door is closed and forced out. A fixing transparent plate may be disposed at the lower part of the door.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door structure of a cab of a working vehicle.

[0002]

2. Description of the Related Art FIG. 14 is a side view of an operator's cab of a mobile crane which is a conventional working vehicle. In the figure, the cab has a sliding door 51. Cab body 1
The upper rail 52 is laid horizontally at the upper part of the entrance 0, the lower rail 53 is laid horizontally at the lower part, and the center rail 54 is horizontally laid on the outer surface of the cab body 10 and at the center of the open side of the door 51. Attached. Door 5
Rollers are respectively mounted on the inner surface of the unit 1 at positions corresponding to the rails 52, 53, 54, and these rollers are rotatably inserted into the grooves inside the respective rails and connected.
Details of the connection between these rails and rollers will be described below.

FIG. 15 is a plan view of the door 51 as viewed from the cab. The upper rail 5 is provided on the upper inside of the door 51.
An upper roller mounting portion 55 having a roller 62 rotatably inserted into the second groove is provided, and rollers 66 and 68 rotatably inserted into the groove of the lower rail 53 are provided at a lower portion inside the door 51. A lower roller mounting portion 56 is provided. A center roller mounting portion 57 having rollers 82 and 84 rotatably inserted into a groove of the center rail 54 of the cab body 10 is provided at a central portion inside the door 51.
Are arranged.

FIG. 16 is a front view of an upper roller mounting portion 55, and FIG. 17 is a K view of FIG. In these figures, a roller 62 is attached to an arm 61 which is fastened to an upper portion of a door 51 with a bolt 64 by a shaft 63 so as to be rotatable in a horizontal direction. The upper rail 52 has a groove 52a.
The roller 62 is inserted into the groove 52a from below, with the roller 62 facing downward.

FIGS. 18 and 19 are a front view and a side view of the lower roller mounting portion 56. FIG. As shown in these figures, a roller 66 is rotatably movable in a horizontal direction on an L-shaped bracket 65 attached to a lower portion of a door 51 with a bolt 71.
The roller 68 is attached by a shaft 69 so as to be rotatable in the vertical direction. And the cab body 10
The rollers 66 and 68 are inserted into the grooves of the lower rail 53 provided below.

FIGS. 20, 21, and 22 are a front view, a plan view, and an explanatory view of a state in which the roller is inserted into the rail, respectively, of the center roller mounting portion 57. In these figures, the holder 8
1 and the base plate 86 are connected by a pin 87, and the holder 81 is rotatable about the pin 87.
The angle formed between the base plate 86 and the holder 81 can be adjusted. The base plate 86 is attached to the center of the inside of the door 51 with bolts 88. The holder 81 has two rollers 82, 82 rotatably in the horizontal direction.
The roller 84 is attached by a shaft 85 so as to be freely rotatable in the vertical direction. The center rail 54 is mounted on the cab body 10 with its groove facing the side, and the rollers 82, 82, 84 are inserted into the groove of the center rail 54.

[0007]

However, the above-mentioned conventional cab door structure has the following problems. Since it is necessary to install the upper rail 52 and the lower rail 53 on the cab body 10 side, the structure on the cab body 10 side becomes complicated. Further, the number of components of the upper roller mounting portion 55 and the lower roller mounting portion 56 of the door 51 is large. In addition, each roller of the upper roller attachment portion 55 and the lower roller attachment portion 56 attached to the door 51 side is connected to the cab body 10.
Upper rail 52 and lower rail 53 attached to the side
In order to rotate the brackets smoothly by inserting them into the brackets, the mounting position of each bracket must be adjusted at the time of assembly, and much time is required for assembly work. For these reasons, there is a problem that the manufacturing cost increases. When the door 51 is closed, the center rail 54 is connected to the cab body 10.
And the door 51 is laid so as to guide the door 51 to the outer surface of the cab body 10 when it is opened. Therefore, while adjusting the angle between the base plate 86 and the holder 81 and the mounting position of the base plate 86 to the cab body 10, the center rail 54 is moved to the cab body 10 so as to smooth the movement of the door 51 when opening and closing.
Must be laid on the outside surface of the In addition, it is necessary to adjust the mounting positions of the upper roller mounting portion 55 and the lower roller mounting portion 56, and there is a problem that the assembling workability is not good. Further, since the center rail 54 is laid on the outer surface of the cab, when an abnormal force is applied from the outside, the center rail 54 is deformed, and the door 51 cannot be opened. There is a problem that there is no durability against sea breeze and the like.

The present invention, which focuses on the above-mentioned problems of the prior art, provides a door structure of a driver's cab of a working vehicle, in which the number of components can be reduced, adjustment work during assembly can be eliminated, and assembly work time can be reduced. With the goal.

[0009]

Means for Solving the Problems, Functions and Effects In order to achieve the above object, an invention according to claim 1 is provided in an opening 90 of a cab body 10 of a cab in a cab door structure of a working vehicle. A door 20 is provided by providing a door frame 1 and a door frame 3 is slidably opened and closed in one of two grooves in an inner peripheral portion of the door frame 1 to form a door 20. Is attached.

According to the first aspect of the present invention, a door frame is provided at the opening of the cab, and the door frame is slidably opened and closed inside the door frame. As a result, the number of components of the sliding door can be reduced, and since the sliding glass sash frame is used for the door frame and the door frame, the structure of the sliding door can be simplified, and adjustment work during assembly can be performed. As a result, the assembling work becomes easier. Therefore, the assembling work time is shortened, and the manufacturing cost can be reduced. Moreover, since there is no guide rail to be mounted on the outer peripheral surface of the driver's cab, there is no damage to the rail due to abnormal external force, the door frame and the door frame are not easily deformed, and the door can be used for a long time, and the durability can be maintained. Performance can be improved. Furthermore, since the window that can be slid open and closed is installed in the door frame using the sash frame, the operator can easily open the window and check the situation outside the vehicle body, making it easy for the operator to see when driving and working. Can be improved. Furthermore, since the glass area is large, the shape of the slide door can be made thin, the space in the cab can be used effectively, and the operability is improved.

According to a second aspect of the present invention, in the door structure of the cab of the work vehicle according to the first aspect, the door is fixed to at least one of the upper part and the lower part of the door 20 to prevent the door 20 from rattling. The door fixing means 30 is attached to the door fixing roller 38 provided on the cab body 10 in the cab and the door fixing roller 38 provided on the door frame 3 when the door 20 is closed. And a plate 39 having a protruding portion that comes into contact with and is extruded.

According to the second aspect of the present invention, the door fixing means for preventing backlash of the door which slides and opens is provided.
In this configuration, a door fixing roller is provided on at least one of the upper side and the lower side of the cab body in the cab, and a plate having a convex portion is provided on the door frame. When the door is closed, the plate having the convex portion of the door frame comes into contact with the door fixing roller and is pushed out by the door fixing roller. In this way, the door is fixed while being pressed against the door frame, so that it is possible to prevent rattling of the door. Therefore, it is possible to reduce the noise in the operator's cab while the crane is moving or working, thereby improving the working environment of the operator.

According to a third aspect of the present invention, in the door structure of the cab of the working vehicle according to the second aspect, a fixed transparent plate 31 is provided below the door 20.

According to the third aspect of the present invention, the fixed transparent plate is disposed below the door. The driver's cab of the work vehicle is usually provided on the upper part of the vehicle body, but the operator can check for the presence of pedestrians, workers, or obstacles at the lower part of the vehicle body through a fixed transparent plate arranged under this door. Visibility can be improved.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below in detail with reference to FIGS. First, a first embodiment of a cab employing a door structure of the present invention will be described with reference to FIGS. FIG. 1 is a side view of the cab, and FIG.
1, FIG. 3 is a sectional view taken along line BB of FIG. 1, FIG. 4 is a sectional view taken along line CC of FIG. 1, FIG. 5 is a sectional view taken along line DD of FIG. It is EE sectional drawing.

In FIG. 1, an opening 90 for a door is formed on one of the left and right sides of the cab body 10 in the cab.
The door frame 1 is fitted over the entire periphery of the opening 90. An outer peripheral portion of the door frame 1 is attached to the cab body 10 by a predetermined number of bolts 12. Two concave grooves are formed on the upper and lower surfaces of the inner peripheral surface of the door frame 1, respectively, and the fixed glass 5 is mounted in one of the grooves (in this example, the groove inside the cab). The door frame 3 is slidably mounted in the other groove (same outer groove). At the bottom of the door frame 3, two rollers 2, 2
Is rotatably mounted. 2 on the inner periphery of the door frame 3
A plurality of concave grooves are formed, and a sash frame 18 having two concave grooves at upper and lower portions is mounted in the left and right direction at a position slightly below the vertical center of the door frame 3. The slide glass 4 forming the window 4 is provided in the upper groove of the sash frame 18 and the upper groove of the inner peripheral portion of the door frame 3.
a is slidably mounted in the front-rear direction (the left-right direction in the figure), and the fixed glass 4b is enclosed by a groove on the upper part of the sash frame 18, an upper part of the inner peripheral part of the door frame 3 and front and rear grooves. It is fixedly attached to the rear. A plate 13 made of a steel plate or the like is mounted in the lower groove of the sash frame 18 and the lower groove of the inner peripheral portion of the door frame 3. A door 20 is formed by the slide glass 4a, the fixed glass 4b, and the plate 13 mounted in the door frame 3. A door 20 is provided on the front outer surface of the plate 13.
A handle 14 with a lock for opening and closing is provided. Hereinafter, each unit will be described in detail.

As shown in FIG. 2, a plurality of tapped bosses 11 are fixed at predetermined positions on the outer surface of the cab body 10. A door frame 1 using a slide sash having the same L-shaped cross section is mounted on a boss 11 with bolts 12 or the like.
And attached to the cab body 10. The packing 7 is disposed between the door frame 1 and the outside of the inner peripheral surface of the opening 90 of the cab body 10. This packing 7
Are mounted on the entire periphery of the door frame 1 and are sealed for waterproofing, dustproofing and soundproofing.

At the inner periphery of the door frame 1 shown in FIG.
It has two concave grooves 1a and 1b. In the front half of the driver's cab opening 90 in the front half from the center, the horizontal part corresponding to the upper position of the driver's cab and the diagonally upper and lower areas on the front
The door frame 3 is incorporated in a groove 1 a on the outside of the vehicle body of the door frame 1. The door frame 3 is an outer frame of the door 20. The door frame 3 is constituted by a sash frame. The cross-sectional shape of the door frame 3 is, as shown in FIGS. 2 and 3, an outwardly projecting outer peripheral portion 3c and two concave grooves 3a and 3b on the opposite side of the convex outer peripheral portion 3c. have. As shown in FIG. 2, a convex outer peripheral portion 3 c of the door frame 3 is incorporated into the groove 1 a of the door frame 1 via the packing 6 above and behind the door 20 of the cab.

In the horizontal portion of the door 20 corresponding to the lower portion of the cab shown in FIG. 3, two rollers 2 are fitted in grooves 1a of the door frame 1 on the outer side of the vehicle body. The rollers 2 are provided at two predetermined locations below the door frame 3 shown in FIG. The roller 2 is attached via a bearing 9 to a threaded shaft 8 which is attached to a hole provided at a predetermined position in a convex outer peripheral portion 3 c of the door frame 3. The screw of the threaded shaft 8 is located at the tip of the portion to which the roller 2 is attached. The threaded shaft 8 is inserted into a hole formed in the convex outer peripheral portion 3c of the door frame 3 and fastened and fixed with a nut 8a. It is. The roller 2 can rotate in a groove 1 a at a lower portion of the door frame 1.

Therefore, the door 20 can open and close the inside of the groove 1a in the lower horizontal portion of the door frame 1 in the vehicle front-rear direction by the rotation of the two rollers 2, 2 mounted on the lower part. Since a sash frame made of a sliding glass is used for the door frame 1 and the door frame 3, the structure of the door 20 that can be opened and closed can be simplified, and the number of components of the door 20 can be reduced. Since it is only necessary to fit in the groove, adjustment work at the time of assembly is also eliminated. These facilitate the assembly operation. Therefore, the assembling work time is shortened, and the manufacturing cost can be reduced. In addition, the door 20 constituted by the door frame 3 that slides in the door frame 1 does not require the center rail used in the conventional sliding door, so that the center rail on the outer surface of the cab body 10 due to abnormal external force. Is not deformed or damaged. This allows
The door 20 can be opened and closed reliably for a long period of time, and the durability is improved.

Further, in the area of the rear part of the door portion of the driver's cab substantially from the center, the fixed glass 5 is provided in the groove 1b on the inner side of the vehicle body among the two grooves inside the door frame 1,
5 is inserted.

As shown in FIG. 2, a slide glass 4a for a window 4 and a fixed glass 4
b, and a plate 13 is incorporated in the lower part as shown in FIGS. The material of the plate 13 is a steel plate or the like, and a handle 14 with a lock for opening and closing the door 20 is disposed on the front outer surface of the plate 13. When the handle with lock 14 releases the fingertip holding the handle at the position where the door 20 is closed, the lock inside the handle (not shown) is engaged with the engaging portion of the cab body 10 by a spring, and the door 20 is moved to the cab. It locks to the main body 10. To release the lock, the handle 14 with the lock may be gripped. Therefore, most of the surface of the door 20 can be thinned, the space in the cab can be used effectively, and the drivability and comfort can be improved.

FIG. 4 shows the state in which the door 20 is closed.
2 shows details of a portion where the fixing glass 5 and the fixing glass 5 overlap. A glass holder 16 is fixed to an end 5 a of the fixed glass 5 on the center side of the cab. When the door 20 is closed, a brush-like packing 17 is mounted on the surface of the glass presser 16 at a position overlapping the door 20 and facing the door 20.

As described above, the fixed glass 5 is mounted substantially behind the center of the door frame 1, and the slide glass 4 a for the window 4, the fixed glass 4 b, and the plate 13 are provided inside the door frame 3 substantially forward of the center. Is mounted. The overlapping portion between the door 20 and the fixed glass 5 is provided with a glass retainer 16 as a sealing material at the end 5a of the fixed glass 5 and a brushed packing 17 on the surface of the glass retainer 16 for waterproofing and dustproofing. It is carried out. Therefore, the glass area on the side of the driver's cab increases, and the side visibility of the operator is good, so that obstacles during driving can be easily confirmed.

As shown in FIG. 5, a sash frame 18 is provided in the left and right direction at a position slightly below the center of the door frame 3 of the door 20 in the vertical direction. Sash frame 1
A slide glass 4a for the window 4 and a fixed glass 4b are mounted on the upper part of the window 8, and a plate 13 is mounted on the lower part. As shown in FIG. 5, two concave grooves 18a and 18b are formed on the upper side of the sash frame 18 in the left-right direction, and two concave grooves 18c and 18c are similarly formed on the lower side.
18c is formed. The slide glass 4a is fitted into the groove 18a via a packing 9a, and the fixed glass 4b is fitted into the groove 18b via a packing 9b. Also, two rubber rubbers 19 are provided in the grooves 18c, 18c.
a and 19b are fitted and attached.
The plate 13 is sandwiched and fixed between the a and 19b. Similarly, as shown in FIG. 3, the lower portion of the plate 13 is provided with two rubber rubbers 19a, 19b fitted and mounted in the two grooves 3a, 3b of the door frame 3, respectively.
It is sandwiched between and fixed.

As shown in FIG. 6, the locking handle 2 is located at a substantially central position in the vertical direction in front of the slide glass 4a fitted in the packing 9a in the groove 3a of the door frame 3.
1 is provided. The slide glass 4a is located in the groove 3b of the door frame 3 and at a position corresponding to the handle 21 with a lock.
Is mounted. A lock 23 having a hook 23c at its tip is rotatably provided on the handle 21 with a lock, and is urged by a spring (not shown). The distal end hook 23c of the lock 23 is urged by the spring into the hole 22a provided in the fixing tool 22 to enter the hole 22a. The handle 21 with a lock is attached to the slide glass 4a on the driver's cab side. A glass holder 25 is attached to the front end of the fixed glass 4b.
5 is fixed to the door frame 3 and the sash frame 18.
Of the glass holder 25 overlapping the slide glass 4a,
A brush-like packing 26 is mounted on the surface facing the slide glass 4a.

As described above, the slide glass 4a for the window 4 and the fixed glass 4b are incorporated in the door frame 3, and the slide glass 4a is slid in the packing 9a held in the groove 18a on the upper side of the sash frame 18. Can be opened and closed. The fixed glass 4b is held by a packing 9b held in a groove 18b on the upper side of the sash frame 18. When the slide glass 4a is slid open and closed, the operator grips the handle 21 with the lock with a finger, releases the hook portion 23c of the handle 21 with the lock from the fixture 22 in the groove 3b of the door frame 3, and releases the handle 21 with the lock. Just slide it while holding it with your finger.

The handle 21 with a lock is mounted inside the driver's cab. When the slide glass 4a is closed by grasping the handle 21 with the lock, the tip hook portion 23c of the lock 23 is opened by a spring (not shown). 22a
Then, the slide glass 4 a is locked to the door frame 3. 6 by pulling the tip hook 23c of the lock 23 in the direction of the arrow in FIG.
If the handle 21 with the lock is slid in this state, the slide glass 4a can be opened.
As described above, since the window 4 which can be easily slid and opened by the operator is disposed in the door 20, the operator can easily open and close the window 4.
To easily check the situation outside the cab. As a result, visibility from the driver's cab is improved, and obstacles during traveling or work can be easily confirmed.

Next, a second embodiment will be described with reference to FIGS.
2 will be described. 7 is a side view of the cab of the present embodiment, FIG. 8 is a cross-sectional view taken along the line FF of FIG. 7, FIG. 9 is a P view of FIG. 8, and FIG. 10 is an enlarged view of a Q portion of FIG. FIG. 11 is a sectional view taken along line GG of FIG. 7, and FIG. 12 is an enlarged view of a portion R in FIG. In these figures, the same elements as those in the figures described in the previous embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 7, a hole 31a is provided substantially at the center of a plate 13 such as a steel plate disposed below the door 20, and a fixed transparent plate 31 is fitted into the hole 31a. The fixed transparent plate 31 is fixed to the plate 13 over the entire circumference by a packing 32 as shown in FIG.

Next, the structure and operation of the fixing means 30 for preventing the door 20 from rattling will be described with reference to FIGS. As shown in FIG. 8 or FIG. 11, supports 33 are fixed to the cab body 10 on the inner surface of the cab body 10 at two locations above and below the door 20. As shown in FIG. 9, each support 33 is formed with two long holes 33 a for bolts to form a U-shaped holder 34 in side view.
The bolt hole formed in one of the opposing portions is connected to the bolt elongated hole 33a of the support 33 by a bolt 35 and a nut 36. A hole 37a is formed at the tip of the other portion of the holder 34 which is not fixed to the support 33.
Has been processed. 8 is attached to one end of the fixing pin 37.
As shown in FIG. 11, a roller 38 is rotatably mounted, and the other end of the fixing pin 37 is inserted into a hole 37 a of the holder 34 and fixed to the holder 34. Note that a bearing may be used instead of the roller 38. With the door 20 closed, a wedge-shaped plate 39 is fixed with screws 41 at two positions of the door frame 3 corresponding to the rollers 38 and on the inside surface of the groove 3b of the door frame 3 inside the vehicle body. I do. When the door 20 is closed, the roller 38 rides on the projection of the wedge-shaped plate 39 and stops. The bolt holes 33a of the support 33 are used to adjust the backlash when the door 20 is closed.

Next, the positional relationship between the door frame 3 below the door 20 and the door frame 1 when the door 20 is opened and closed by sliding or when the door 20 is opened will be described. Door 2
When the door 0 is opened and closed or when it is opened, a lower end of the door 20 is provided at the lower end of the door frame 1 with a threaded shaft 8 that fixes the roller 2 for slidingly opening and closing the door 20. 1 between the inner wall surface of the groove 1a and FIG.
The gap S is provided as shown in FIG. When the door 20 is closed, the above-mentioned roller 38 rides on the convex portion of the wedge-shaped plate 39, and the fixing pin 37 fixing the roller 38 is fixed to the holder 34. The door frame 3 to which the door 39 is attached is pushed out of the vehicle body. As shown in FIGS. 8 to 10, when the door frame 3 is pushed outward, the door frame 3
The screwed shaft 8 of the roller 2 fixed to the door frame 3 is also pushed out of the vehicle body integrally with the door frame 3. Then, the distal end of the threaded shaft 8 is pushed out through the gap S to the inner wall surface of the groove 1a of the door frame 1, and the distal end of the threaded shaft 8 is slightly pressed after contacting the inner wall of the groove 1a of the door frame 1. The door frame 3 is fixed so as not to rattle. This state is the position where the door 20 is closed. At this time, by moving the position of the holder 34 within the range of the bolt long hole 33a of the support 33, the door frame 3 can be adjusted so as not to rattle.

As shown in FIG. 12, when the door 20 is opened and closed or opened, a convex outer peripheral portion 3c of the door frame 3 above the door 20 and a door are provided above the door 20. A gap T is formed between the frame 1 and the packing 6 inside the groove 1a. When the door 20 is closed, as shown in FIG.
8 rides on the convex portion of the wedge-shaped plate 39, and the fixing pin 37 fixing the roller 38 is fixed to the holder 34. Therefore, the door frame 3 on which the wedge-shaped plate 39 is It will be pushed out. When the door frame 3 is pushed outward, as shown by a dotted line in FIG. 12, the side surface of the convex outer peripheral portion 3c on the upper side of the door frame 3 moves the packing 6 inside the groove 1a of the door frame 1 into the vehicle body. Pressing outward, the side surface of the upper convex portion 3c of the door frame 3 and the packing 6
And the restoring force of the packing 6 at this time, the door frame 3
Is fixed so that it does not rattle. In this state, the door 20
In the closed position.

As described above, when the door 20 is closed, at the lower part of the door 20, the tip of the threaded shaft 8 of the roller 2 attached to the door frame 3 is inserted into the groove 1a of the door frame 1.
After being in contact with the inner wall surface of the door 20, it is slightly pressed and fixed, so that the lower side of the door 20 is prevented from rattling. Also,
At the upper part of the door 20, the door frame 3 is pushed outward, the side surface of the upper convex portion 3c of the door frame 3 and the packing 6 are in close contact, and the door frame 3 is fixed by the restoring force of the packing 6 at this time, The upper side of the door 20 is prevented from rattling.

Thus, the door 20 is closed and the door 20 is closed.
When the handle 14 with a lock for sliding opening and closing is locked, the door 20 can be fixed to the cab body 10 at two upper and lower positions of the door 20 without any manual operation, so that the door 20 does not rattle. Then, the slide glass 4a of the window 4 provided inside the door frame 3 is also a handle 2 with a lock.
1 and no rattling occurs, so that noise in the driver's cab while the vehicle is moving or working can be reduced and the working environment of the operator can be improved. Further, the door 20 is fixed to the cab body 10 in the cab at three places by locking the handle 14 with the lock of the door 20 and fixing means 30 for preventing rattling of the two upper and lower doors 20. This can prevent the door from being accidentally opened.

Also, by installing a fixed transparent plate 31 almost at the center of the plate 13 such as a steel plate disposed below the door 20, a driver's cab is provided above the vehicle body like a mobile crane. In the vehicle, when the operator wants to check the outside from the driver's cab, it is easy to confirm the presence or absence of a pedestrian, a worker, or an obstacle located below the driver's cab through the fixed transparent plate 31. Therefore, the visibility of the operator is improved, and the visibility at the time of traveling or working can be improved. Depending on the situation, it goes without saying that the slide glass 4a of the window 4 can be slid open for confirmation.

In the first and second embodiments of the present invention, an example of a door structure of an operator's cab in which the door 20 has a box shape surrounded by a substantially flat surface has been described. As shown in FIG. The outer shape may be conical, and the horizontal sectional shape of the door (not shown) may be circular. Cab body 10 on the upper side and lower side of the cab, door frame 1, door frame 3 and sash frame 1 assembled inside cab body 10
The present invention can be easily implemented by manufacturing the glass 8 in an arc shape and forming the slide glass and the fixed glass 5 attached to the window 4 into a shape having an arc surface with a straight line in the vertical direction.

[Brief description of the drawings]

FIG. 1 is a side view of a first embodiment of a cab provided with a door structure of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along the line BB of FIG. 1;

FIG. 4 is a sectional view taken along line CC of FIG. 1;

FIG. 5 is a sectional view taken along line DD of FIG. 1;

FIG. 6 is a sectional view taken along the line EE of FIG. 1;

FIG. 7 is a side view of a second embodiment of the present invention.

FIG. 8 is a sectional view taken along line FF of FIG. 7;

9 is a view as viewed in the direction P in FIG. 8;

FIG. 10 is an enlarged view of a portion Q in FIG. 8;

FIG. 11 is a sectional view taken along line GG of FIG. 7;

FIG. 12 is an enlarged view of a portion R in FIG. 11;

FIG. 13 is a door structure diagram of a driver's cab in which a door is formed in an arc shape.

FIG. 14 is a side view of a cab of a conventional mobile crane.

FIG. 15 is a plan view of the door as viewed from the cab.

FIG. 16 is a front view of an upper roller mounting portion.

FIG. 17 is a K view of FIG. 16;

FIG. 18 is a front view of a lower roller mounting portion.

FIG. 19 is a side view of a lower roller mounting portion.

FIG. 20 is a front view of a center roller mounting portion.

FIG. 21 is a plan view of a center roller mounting portion.

FIG. 22 is a detailed view of a center roller mounting portion.

[Explanation of symbols]

1 ... door frame, 1a, 1b ... groove of door frame,
2, 38, 62, 66, 68, 82, 84 ... rollers, 3
... door frame, 3a, 3b ... concave groove of door frame, 3c ... convex portion of door frame, 4 ... window, 4a ... slide glass, 4b, 5 ... fixed glass, 5a ... end face of fixed glass, 6, 7, 9a , 9
b, 15, 32: packing, 8: shaft with screw, 8a, 3
6 nut, 10 cab body, 11 boss, 12, 3
5, 64, 71, 88: bolt, 12a: washer, 13,
39 ... plate, 14, 21 ... handle with lock, 16,
25: glass holder, 17, 26: brushed packing,
18: sash frame, 18a, 18b, 18c: concave groove of sash frame, 19a, 19b: rubber rubber, 2
0,51: door, 22: fixture, 22a: hole of fixture,
Reference numeral 23: Lock, 23c: Tip hook portion, 30: Door fixing means, 31: Fixed transparent plate, 33: Support, 33a: Slot for bolt, 34, 81: Holder, 37: Fixing pin, 4
DESCRIPTION OF SYMBOLS 1 ... Screw, 52 ... Upper rail, 53 ... Lower rail, 54 ... Center rail, 55 ... Upper roller mounting part, 56 ... Lower roller mounting part, 57 ... Center roller mounting part, 61 ... Arm, 63, 67, 69, 83, 85 ...
Fixed shaft, 65: L-shaped bracket, 86: Base plate.

Claims (3)

[Claims] An cab door structure of a working vehicle, wherein a door frame is provided at an opening (90) of a cab body (10) of the cab.
(1) is provided, and the door frame (3) is slidably opened and closed in one of the two grooves on the inner peripheral portion of the door frame (1) to constitute the door (20). A door structure for a driver's cab of a work vehicle, wherein a window (4) is mounted so as to be able to slide open and close inside. 2. The door structure for a driver's cab of a work vehicle according to claim 1, wherein at least one of an upper portion and a lower portion of the door (20) includes:
A door fixing means (30) for preventing rattling of the door (20) is mounted.The door fixing means (30) includes a door fixing roller (38) provided on the cab body (10) of the cab, and a door frame. (3) and a plate (39) having a convex portion that is pushed out of contact with the door fixing roller (38) when the door (20) is closed. Driver's cab door structure. 3. The door of a cab of a work vehicle according to claim 2, wherein a fixed transparent plate (31) is provided below the door (20). Construction.