JPH10183686A - Operation cab in construction mechine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an operation cab in a construction machine by a method wherein not only the work efficiency but also habitability and convenience at getting on and off is improved by a simple construction without complicating the construction of the operation cab so that better functions can be produced. SOLUTION: In the construction machine, a revolving base is provided on a running frame and an operation cab l is mounted on one side of the revolving base. In this case, a front window 3 having a chevron-shaped cross section is integrally provided so as to extend from the front of the cab 1 to a part of a side thereof, and a door 10 is formed in such a manner that the front window 3 is forwardly expanded so as to clear a front side column supporting the curved side end of the window 3, so that the door 10 can be moved and stored along the outside of the cab 1, and an opening is used as an entrance of the cab 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driver's cab of a construction machine having a swivel such as a power shovel and the like, and more particularly, to improving the visibility of a front window of a driver's seat and improving convenience when getting on and off. The present invention relates to a driver's cab of a construction machine having a configuration with improved workability.

[0002]

2. Description of the Related Art Conventionally, a driver's cab with a door used in construction machines such as power shovels is mounted on one side (mainly on the left side of a vehicle body) on a revolving base due to the structure of the machine. Since the boom is mounted on the side (substantially on the center line of the vehicle body), the driver's cab is provided with a doorway with a door that can get on and off from the outside (left side) of the installation side. This kind of cab is provided so as to fit within a turning radius on a turntable mounted together with a bucket boom (a jib in the case of a crane or the like) in order to secure safety due to the nature of the machine. . In addition, in a power shovel or the like, a driver often leans out of a driver's cab and drives in order to check a work situation at a front position during work.

[0003] From these various situations, the operator's cab is generally subject to some restrictions, and it is difficult to provide a structure having sufficient space. Therefore, conventionally, various proposals have been made to improve the driving workability, the livability and the convenience of getting on and off the driver's cab.

For example, as disclosed in Japanese Patent Application Laid-Open No. 7-216936, a driver's cab having a
There is a door in which a quarter-arc door is slid in a horizontal arc to open and close, and the opening / closing trajectory of the door is set within a turning radius.
Further, as disclosed in Japanese Utility Model Laid-Open No. 6-79853, the shape of the front window is an integral window from the upper part to the lower part, the front part is flat, and the front part is flat from the front corner to the driver cab side. As a structure bent to make the part along the side, the front window can be opened and closed in the direction perpendicular to the front centering on the hinge pin provided on the right pillar, and after opening, it is slid and stored along the right side of the cab, There are some that allow the driver's cab to get on and off from the front in a narrow area.

In Japanese Utility Model Publication No. 6-24442, a door provided on the side of the driver's cab is formed in an arc shape,
There has been proposed one that can be opened and closed by sliding in a horizontal arc shape, and the opening and closing trajectory of the door can be accommodated within a turning radius, thereby preventing damage due to interference between the door and an external object. Furthermore, Japanese Utility Model Publication No. Hei 5-24569 proposes a structure of a slide link mechanism of a laterally-pullable door, in which the opening width of a side portion of a driver's cab is widened to improve getting on and off.

In addition, the front window of the driver's cab is divided into a lower fixed window and an upper open / close window, and the upper and lower windows are automatically or manually opened and closed from the front of the cab to the ceiling. There is a structure in which a driver can lean on the body to drive while checking the work state of the front position, and a door is provided on the outer surface.

[0007]

However, in the above-mentioned prior arts, measures have been taken to achieve the required objects, however, these have many problems.

That is, in the above-mentioned Japanese Patent Application Laid-Open No. Hei 7-216936 and Japanese Utility Model Publication No. Hei 6-24442, the front part of the cab can be opened and closed, and the convenience of getting on and off the cab is improved. On the other hand, since the front window is curved, an object in front looks distorted during normal driving, and visibility is impaired. Further, in the structure disclosed in Japanese Utility Model Laid-Open Publication No. 6-79853, the opening and closing operation of the front window is configured to be opened and closed around the hinge pin as a rotation center.
The opening and closing operation must be performed by at least two operations of opening and closing around the hinge pin and sliding the driver in the open state to the right side of the cab, which is inconvenient. In addition, once opened, the driver's hand is too far to close, making it difficult to operate, and a scaffold must be secured. Further, according to Japanese Utility Model Publication No. 5-24569, the window (door) protrudes outside when the window is opened and projects outside the turning radius, so that the surrounding condition is always checked when the door is opened and closed. This is inconvenient in terms of handling.

Further, as described later, in the type in which the front window of the cab is divided into two upper and lower parts and the entrance door is provided on the outer surface, the front window is stored in the ceiling of the cab when the window is opened. Therefore, the strength of the pillars in the driver's cab needs to be ensured, so that the pillars are thickened, which deteriorates the forward visibility. In addition, the opening and closing operation of the front window manually has a feeling of bitterness due to the weight of the window, and it is necessary to pay attention to safety in operation. Further, even when the front window is opened, the fixed window and the split bar remain at the front of the cab, so that if the fixed window and the split bar are dirty with dust, it is inconvenient to see the working condition of the lower front part. Moreover, the entrance to and exit from the driver's cab is mainly an opening door on the side of the driver's cab, but since the door itself occupies half the width of the driver's cab, the width is narrow and hinders getting on and off. There are many things.

The present invention has been made in order to solve such a problem, and has a very simple structure without complicating the structure of a driver's cab, as well as workability, livability, and convenience at the time of getting on and off. It is an object of the present invention to provide a driver's cab in a construction machine capable of improving performance and exhibiting a better function.

[0011]

In order to achieve the above object, the present invention provides a swivel base on a traveling frame,
In a construction machine having an operator's cab on one side of the swivel table, a front window integrally formed in a cross section from the front part of the operator's cab to a part of the lateral outer surface is provided at the front of the operator's cab. The front window is characterized by forming a door which is raised so as to fend off a column supporting an end of the curved side portion and is movable along the outside surface of the cab.

In the present invention, the door of the cab is
A guide roller is provided at each of the upper and lower ends of the front window, and a guide roller is attached to a link mechanism that is rotationally displaced to an intermediate position between the curved side end portions of the front window. The corresponding guide rollers provided with the front window end portion, and the guide rollers with the link mechanism are respectively engaged and supported by guide rails provided at the intermediate portion on the outer side surface of the cab, and when the door is opened and closed, It is preferable that the link mechanism is configured to be able to slide open and close by inverting the support column on the front side of the cab and turning outward.

[0013] Further, the lower portion of the ceiling portion at the rear end outer surface of the cab is formed in a concave portion so that the curved side portion of the door opened in the concave portion can be stored. Is kept within the turning radius of the turntable, and safety can be maintained without any trouble in driving operation with the door opened.

The cab of the construction machine of the present invention thus constructed can extend the field of view without obstacles such as a support or a crosspiece that obstructs the field of view to a part of the front surface to which the front window is connected. Moreover, since the main front portion can be kept flat, the field of view does not look distorted. In addition, by sliding the entire front window sideways as a door, it is possible to more easily perform a work situation check operation near the front of the body after leaning forward.

Further, by forming a sliding door in which the front window to a part of the front side surface is integrally formed, the width of the opening of the driver's cab can be greatly widened, so that it is easy to get on and off the vehicle, and in a narrow place. Even if there is, it is possible to get on and off from the front part, and convenience is improved. Furthermore, when the door is opened and closed, it can be slid out of the way so as to evade the position of the strut and can be continuously slid backward along the outside surface of the cab, even if the side end is curved, so that it is reasonable. Can be opened and closed without difficulty. When the door is opened, a recess is formed at the rear end of the cab, and the curved rear end of the door is housed in the recess, so that the turning operation with the door fully opened is performed. In this case, the door is within the turning radius, and there is no problem.

[0016]

Next, a specific embodiment of a cab of a construction machine according to the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing the entire exterior of a cab according to an embodiment of the present invention. 2A and 2B are cross-sectional views of the cab shown in FIG. 1, wherein FIG. 2A is a cross-sectional view of the entirety, and FIG. 2B is a cross-sectional view of a front window. FIG. 3 is a schematic diagram illustrating an arrangement of door guide rails in a cab. FIG. 4 is a partially cutaway perspective view of the door. FIG. 5 is a cross-sectional view illustrating an aspect of a guide rail of each part in FIG.
(A) shows a cross section of the upper rail, (b) shows a cross section of the lower rail, and (c) shows a cross section of the center guide rail. FIG.
FIG. 1 is an overall perspective view of a center guide roller of a door and a mounting link mechanism thereof.

As shown in these figures, the operator's cab 1 of the construction machine according to the present embodiment (this example is a power shovel, but the structure of the machine is not shown).
Is installed so as to be offset from the center line on the turntable in a power shovel of a known structure and to fit within the turning radius of the turntable. This driver's cab is formed by integrally combining four front and rear struts, a side wall portion connecting them, a ceiling portion, and a bottom portion, flattening the side surface on the boom side, and surrounding the other side surface with a required curved wall. It has a broken shape.

The more specific shape of the cab 1 is shown in FIG.
(A), (b), shown by FIGS. 3 and 4.
The front window 3 of the driver's cab 1 has a side pillar 4 (post) positioned at a right corner when viewed from the driver's seat 2 (the direction will be described below when viewed from the driver's seat 2) and a front side to a left side. The front surface and a part of the front side surface are integrated with the front column 5 (support) provided at a slightly lowered position, and the plane cross section including the curved portions of the front surface and the front side surface is "he". The door 10 has a movable structure in which a single glass plate 11 having a “character shape” is surrounded by a metal frame 12.

Therefore, the cab 1 is formed such that the space between the side pillar 4 and the front pillar 5 to which the door 10 constituting the front window 3 is attached is completely opened to form a wide opening A. Are formed integrally with the frame. A window 6 is provided on the side surface (left side surface), and a skylight 8 is provided on the ceiling 7 so that the field of view other than the front window 3 can be confirmed (see FIG. 1).

Next, the door 1 constituting the main body of the front window 3
Reference numeral 0 denotes a single glass plate 11 having a flat cross-section of “H-shape”, which is integrated with a metal frame 12 so as to surround the outer periphery of the glass plate 11 as described above. 15 is attached via a bracket 14, and a lower guide roller 16 composed of a vertical roller 16 'rotating on a vertical axis and a horizontal roller 16 "rotating on a horizontal axis is provided at a lower right position of the frame body 12 to form the bracket. The center guide roller 17 is attached to the left end intermediate position.

In order to guide and support the door 10 having the above-described structure, as shown in FIGS. The upper rail 20 of the opening is drawn inward at the right end, and the other is provided to the left side in a shape substantially similar to the cross-sectional shape of the door 10. The upper rail 20 is provided with the upper guide roller 15 of the door 10. Engage.

FIGS. 3 and 5B show the lower part of the cab 1.
As shown in the figure, a slit 21a is provided outside the floor 9 portion, and a downwardly open guide groove 21 'and a front laterally open portion are formed along the upper and lower portions of the slit 21a so as to draw the same trajectory as the upper rail 20. A lower rail 21 is provided in combination with a guide portion 21 "of the lower rail 21.
The lower guide roller 16 of the door 10 (horizontal roller 1)
6 "and the vertical roller 16 ') are engaged with each other to guide and support the front end side of the door 10 up and down.

In the middle part on the left side of the cab 1,
As shown in FIG. 5 (c), in parallel with the upper rail 20 and the lower rail 21, as shown in FIG.
A center guide rail 23 having an edge is provided along the side surface in an arc shape.
A center guide roller 17 provided so as to reversely rotate by a link mechanism 25 attached to a middle position on the left end (curved end portion 10 ′) of 0 engages to guide and support the rear portion of the door 10. . The center guide rail 23 is preferably provided on a horizontal plane passing through the position of the center of gravity of the door 10 in order to open and close the door 10.

As shown in FIGS. 1 and 2, the rear end of the operator's cab 1 where the center guide rail 23 is provided has a smaller circular arc curvature on the left side of the operator's cab 1 than the ceiling eaves. When the door 10 is fully opened, the curved end 10 ′ of the door 10 is housed in the recess 30 so as not to protrude outward.

The link mechanism 25 and the center guide roller 17 attached to the curved end 10 'of the door 10 are shown in FIG.
As shown in the figure, the swing link 27 connects the base end 27 ′ to the support pin 26 ′ by the bracket 26 for attaching the link mechanism 25 to the inner surface of the rear end (curved end 10 ′) of the frame 12 of the door 10. The swing link 27 is attached by its support pin 26 'so as to be rotatable about 180 degrees horizontally. The swing link 27 is bent at an intermediate portion so that the center guide roller 17 can be kept engaged with the end of the center guide rail 23 with the door 10 closing the opening A of the cab 1. . Such a swing link 2
7 has horizontal guide rollers 17 ′, 17 ′ that can rotate horizontally on two vertical axes via a roller support bracket 28, and these horizontal guide rollers 1 ′.
A center guide roller 17, which is located between 7 'and 17' and comprises a rolling roller 17 "that rotates on a horizontal axis and supports a load, is provided. A roller that supports the center guide roller 17 is provided. The support bracket 28 is attached to the tip 27 ″ of the swing link 27 by a connecting pin 28 ′ that is parallel to the support pin 26 ′ so as to swing freely in the horizontal direction, and the tip 27 of the swing link 27. Swinging link 2 which is always bent by a spring 29
7 is urged in the direction of arrow P so as to be parallel to the front half 27a side.

In the frame 12 of the door 10, a pull 18 is provided inside and outside the middle of the front end, and a pull 18 'is provided on the surface of the curved end 10' at the middle of the rear end. The opening and closing operations are facilitated. Then, an appropriate position of the front window 3 (above the pull 18 in the embodiment).
Is attached with a sweeper 19 for wiping a window. Although not shown, a lock device having a well-known structure is attached to an appropriate position between the door 10 and the frame of the cab 1. Although the detailed illustration is omitted, the frame 12 of the door 10 is not illustrated.
Is provided with a seal packing for a portion fitted to the cab frame to ensure watertightness when the door is closed.

The operator's cab 1 of the present embodiment thus configured
Is mounted on a swivel base in the same manner as that of a conventional construction machine. Although not shown, various devices and control sticks for driving are arranged in the driver's cab 1 at the front of the driver's seat 2 and other places suitable for driving.

In the driving state, as described above, the front surface of the driver's seat 1, that is, the front window 3, is closed with the door 10 as shown in FIG.
1 to keep the field of view wide due to being flat, and there is no obstacle such as distortion. Further, since the front pillar 5 is located behind the corner between the front surface and the front side surface, the field of view can be more effectively expanded.

To open and close the door 10, first open it:
When the lock device is released and the door 10 is moved in the opening direction by the pull 18, the upper guide roller 15 and the lower guide roller 16 attached to the door 10 are guided along the corresponding upper rail 20 and lower rail 21, respectively. ,
As shown by the position B in FIG. 7 from the door closing position (see FIG. 2B), the door 10 is displaced so as to protrude forward. At this time, when thrust acts on the center guide roller 17 attached to the curved end 10 ′ of the door 10, the link mechanism 2 supporting the center guide roller 17.
5 has a joint structure in which a roller support bracket 28 that directly supports the center guide roller 17 and a swing link 27 are connected by a pin, so that the curved end 10 ′ of the door also moves forward. The door 10 is pushed out, and as a result, the door 10 is in a state of protruding forward.

In this state, the door 10 is pulled by the puller 1 as it is.
8, the center guide roller 17 attached to the curved end 10 'of the door 10 is attached via the joint of the link mechanism 25 as described above. It is in a state of being stretched. As a result, the swinging link 27 of the link mechanism
The pivoting link 27 is rotated around the connecting pin 28 'of the door and the roller support bracket 28 as a reference, and the curved end 10' of the door is largely displaced outward to evade the front pillar 5 and the position in FIG. It moves and displaces like C. Therefore, if the door 10 is slid as it is, the front end of the door 10 is guided by the upper rail 20 and the lower rail 21, and the curved end 10 ′ of the door is guided by the center guide roller 17 following the center guide rail 23. And
As shown by a position D in FIG.
0 can be stored along. In this state, the curved end 10 ′ of the door fits into the recess 30 formed at the rear end of the cab 1.
Does not protrude outside, and does not hinder the work even if the operation is performed with the doors opened while being accommodated within the turning radius.

As described above, in this embodiment, the door 10 can be moved from the front side to the left side of the operator's cab and opened by simply sliding the door 10 horizontally.
8A and 8A, the front portion of the driver's seat 2 is
A wide space can be secured as shown by. Therefore, even if the operator moves forward in the driver's cab and performs the operation of confirming the forward operation, the operation can be performed with a sufficient margin. In addition, a wide opening is formed as an entrance to the driver's cab, so that getting in and out of the vehicle becomes easy.

With respect to the operation of closing the door 10, the door 10 and the center link roller 17 and the supporting link mechanism 25 are operated by the reverse operation of the opening operation, and the opening of the front portion of the driver's seat 2 is quite easily performed. Section A can be closed. Further, since the door 10 has a structure in which the door 10 is temporarily raised forward and then moved without directly sliding at the time of opening and closing, the watertightness in the closed state is effective.

[0034]

As described above, according to the present invention, since there is no obstacle in the front window of the driver's cab, the visibility is significantly improved.
There is an advantage that the airtightness against the wind and rain is improved and the livability is improved, and the opening and closing operation of the front window can be easily performed without depending on an unreasonable posture, so that the operability is remarkably improved. In addition, since a wide opening can be secured at the front of the driver's cab, the space as the entrance and exit is effective as it is, and it is convenient not only to get on and off in a normal place but also in a narrow place. Furthermore, since there is no need to store the front window in the ceiling, the overall structure can be simplified, a rational design can be achieved, and the economy can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the entire exterior of a cab according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the cab shown in FIG.

FIG. 3 is a schematic diagram illustrating an arrangement of door guide rails in a cab.

FIG. 4 is a partially cutaway overall perspective view of a door.

5A and 5B are cross-sectional views illustrating aspects of a guide rail of each part in FIG. 3, wherein FIG.
FIG. 3B is a diagram illustrating a cross section of a lower rail, and FIG. 3C is a diagram illustrating a cross section of a center guide rail, with a guide roller engaged with each of them.

FIG. 6 is an overall perspective view of a center guide roller of a door and a link mechanism for attaching the center guide roller.

FIG. 7 is a diagram illustrating a mode of displacement when a door is opened.

FIG. 8 is an overall perspective view illustrating an appearance of a cab with a door opened.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Operator's cab 2 Driver's seat 3 Front window 4 Right side pillar (post) 5 Left front pillar (post) 10 Door 10 'Curved end of door 11 Glass plate 12 Door frame 15 Upper guide roller 16 Lower guide roller 17 Center Guide Roller 20 Upper Rail 21 Lower Rail 23 Center Guide Rail 25 Link Mechanism Supporting Center Guide Roller 26 Bracket for Mounting Link Mechanism 27 Swing Link 27 "Tip of Swing Link 28 Roller Support Bracket 28 'Connection Pin 30 A recess at the rear end of the cab A Opening of the cab

Claims (3)

[Claims] 1. A construction machine having a turntable on a traveling frame and a driver's cab mounted on one side of the turntable, comprising: a front portion of the driver's cab; The front window, which is integrally formed in a cross-section in the shape of a cross-section, is arranged, and this front window protrudes so as to fend off the column supporting the curved side end, and forms a door that can be moved and stored along the outside surface of the cab. A cab for a construction machine, characterized in that: 2. The driver's cab door includes guide rollers at upper and lower ends of the front window, and is mounted via a link mechanism which is rotationally displaced to an intermediate position between the curved side ends of the front window. A guide roller is provided, and upper and lower guide rollers provided with the front window end are provided on an upper rail and a lower rail of an operator cab, and a guide roller provided with a link mechanism is provided on a guide rail provided at an intermediate portion on an outer side surface of the operator cab. 2. The cab of a construction machine according to claim 1, wherein the cab is engaged and guided, and when the door is opened and closed, the link mechanism is configured to be able to open and close by slidably reversing a support at the front side of the cab. 3. A concave portion formed at a lower side of a ceiling portion on a rear end outer side surface of the cab, so that a curved side surface portion of the door opened in the concave portion can be stored. 3. A cab of the construction machine according to 2.