KR20010049858A - The cabin for the construction machine and the construction machine equipped said cabin - Google Patents

Abstract

PURPOSE: To provide a cab structure in which a sliding door does not overhang to the outside from the maxmum revolving radius when opening or closing it and enlarges the effective space of the cab as much as possible and further, it can be smoothly opened or closed and also provide a construction machine equipped with the cab. CONSTITUTION: A revolving base is provided on a lower traveling body. The external side face 10 is installed at a position deviating from the revolving center of the base and is formed of a curved face bulging out and a sliding door is provided in the external side face 10. In this case, the radius R2 of curvature of the rear half of the external side face 10 is set smaller than the radius R1 of curvature of the front half, and the sliding door 16 is opened or closed along the external side face 10.

Description

Cab of construction machine and construction machine which installed this cab {THE CABIN FOR THE CONSTRUCTION MACHINE AND THE CONSTRUCTION MACHINE EQUIPPED SAID CABIN}

TECHNICAL FIELD The present invention relates to a cab of a construction machine such as a hydraulic shovel or a crane car, and a construction machine having the cab.

This kind of construction machine is provided with a turning table on a traveling body having a wheel, a caterpillar belt, or the like, as disclosed in Japanese Utility Model Registration No. 2526933, for example, and a shovel device and a crane device on the turning table. Work apparatuses, such as an electric power plant, and the cab for starting, stopping, and controlling a traveling body of these working apparatuses are provided. The cab is miniaturized to be accommodated in the movement trajectory while avoiding interference with the work device during work, but at the same time, the opening and closing of the cab is opened and closed by a slide door to ensure comfortable habitability and an effective space. The outer side surface portion containing the position is accommodated in the circular arc surface of the radius close to the maximum turning radius of the pivot table, or inside the endless track belt, and the slide door to the same arc surface shape as the outer side surface portion, the circular arc surface Slide along.

In addition, the front surface portion of the cab is provided with a window on the entire surface, and in particular, through the front surface window portion, the clock of the front upper side is wider to improve operability, and work such as a bucket and a boom. In order to avoid interference with the apparatus, the upper side of the front face portion is formed to be inclined backward so as to be located rearward toward the upper side.

By the way, if the pillars standing at the four corners of the cab stand vertically parallel to each other, even if the outer side of the cab is formed in an arc shape along the outer diameter of the turning table as mentioned above, The filler may be formed to the same thickness over the top and bottom. However, in the case where the upper portion of the front window portion of the cab is formed to be inclined to the rear as described above, when the outer side portion is formed as a single arc, that is, as a part of the cylindrical body, the front window portion and the outer side portion and The front pillars, which are placed vertically from the front, are gradually increased from the inclination angle of the front window to the top from the inclination angle of the front window, and the width of the left and right gradually increases, so that the front of the outer front of the cab is increased. I make an clock extremely narrow. Therefore, the Japanese Utility Model Registration No. 2526933 discloses that almost the entire front surface of the outer side surface is inclined inward toward the upper side, and the left and right widths of the front pillars are uniformly seen from the front surface, so as to balance the overall body. have.

Further, for example, in the cab disclosed in Japanese Patent Laid-Open No. 2722055, the curvature of the first half portion of the outer side portion of the cab is the same radius of curvature over the top and bottom, and all arcs are the first half and the second half portion of the outer side portion. The three-dimensional curved surface obtained by moving the center point to the rear side toward the upper side so as to intersect at the boundary line of the part), and the left and right width dimensions of the side surface of the filler so as not to change in the vertical direction, A watch on the outside front side is secured.

According to the above publication, the door slide surface in the door opening of the cab is formed at the lower end of the door opening as a lower arc having the same center as the pivot center of the swing table from the lower end of the filler, and the maximum width of the cab from the lower end of the door opening. A point at which the outer lower end of the rear end face of the cab is located inside the pivot table rather than the intersection of the rear end face and the lower arc is formed as a basic arc connecting the lower end of the door opening, and the upper end of the door opening from the lower end of the door opening. Until now, the center of the said basic arc is formed as the same circular arc which shifted back according to the rear inclination of the front window part. And the outer side surface which is rear of the said door opening and reaches the rear end of a cab is formed as the same cylindrical surface which consists of the said basic arc which connects with the rear end of a cab from the rear end of a door opening.

With such a configuration, in the construction machine cab disclosed in the above patent publication, the front surface of the cab has the same width over the top and bottom, and the aesthetics from the front of the cab is maximized while maximizing the width of the cab even when the top is inclined backward. It is possible to obtain an excellent one, to be easy to manufacture, and also to avoid protruding the door stopper provided at the rear end of the cab from the turning table.

According to the construction machine cab disclosed in the above patent publication, the door opening portion at the outer side surface portion of the cab is formed as a three-dimensional curved surface as described above, and the rear portion from the rear end of one door opening to the rear end of the cab. The outer side surface portion is formed as a cylindrical surface. The three-dimensional curved surface of the door opening and the cylindrical surface of the rear outer side portion are formed in a shape along the basic arc of the same radius as seen in the plane as described above, but the three-dimensional curved surface at the upper end of the door opening, for example. The surface side has the shape along the circular arc which moved the center point to the back from the center of the cylindrical surface of the rear part outer side part part.

Thus, the circular arc by the three-dimensional curved surface which moved the center point with the same radial dimension is made to intersect with the cylindrical surface of the outer side part of a rear part at the point of the rear end of a door opening, and the intersection angle of the said center point It becomes small according to the amount of movement. As a result, along the rear end of the door opening, a smooth continuous surface between the three-dimensional curved surface and the cylindrical surface of the rear side outer side portion cannot be obtained, and it becomes angled in a bent shape in plan view, Aesthetics are damaged.

Moreover, the basic arc at the lower end of the door opening is inscribed with the lower arc passing through the lower end of the front outer pillar. Thus, the cylindrical surface of the rear outer side portion is, for example, a cylindrical shape along the lower arc, and the rear end is moved to the lower arc while moving the center point to the rear according to each height position on the outer side edge constituting the door opening. By sequentially obtaining an inscribed circular arc to form a three-dimensional curved surface, the three-dimensional curved surface and the cylindrical surface of the rear side outer side portion can be made to have a shape that smoothly continues on the inner contact point.

In any case, however, the overall shape of the slide door needs to have the same shape along the outer side portion of the cab having a three-dimensional curved surface at least in part as described above. Therefore, the slide door also consists of a three-dimensional curved shape portion and a cylindrical portion, and when the opening and closing of the slide door, in particular when opening the opening of the hatch by the slide door, the inner surface of the three-dimensional curved surface portion is the rear of the cab. Mounted on the part outer side surface part, the entire door cannot be lifted outward from the rear part outer side part. As a result, the above-mentioned floating amount is calculated, and the outer side surface portion of the cab must be arranged inward from the outer diameter of the turning table, and the interior width of the cab is narrowed by that amount.

An object of the present invention is to ensure that the door does not protrude outward from the maximum turning radius of the swing table at the time of opening / closing the slide door, thereby increasing the effective space of the above-mentioned cab interior as much as possible and smoothly opening and closing the slide door. It is to provide the structure and the construction machine which installed this cab.

1 is a side view of a hydraulic excavator installed cab of the present invention.

Fig. 2 is a perspective view of a cab when the slide door showing a representative embodiment of the present invention is closed.

3 is a perspective view of a cab when the slide door is opened.

4 is a structural explanatory diagram schematically showing a form and a three-dimensional form seen from the upper surface of the outer side surface portion of the cab;

5 is an explanatory diagram showing a supporting structure of a slide door according to an embodiment of the present invention.

6 is an explanatory diagram showing a supporting structure of a conventional slide door.

7 is an explanatory diagram of a guide trajectory of a slide door in a cab of the present invention.

Fig. 8 is a plan view showing an example of a guide trajectory of a slide door when the bottom edge of the outer side surface portion of the cab of one embodiment of the present invention is simply formed with the same arc over the front and back;

Fig. 9 is a plan view showing an example of a guide trajectory of a slide door when the lower edge of the lower end portion of the outer side face portion of the cab according to one embodiment of the present invention is smaller than the first half portion.

<Explanation of symbols for main parts of drawing>

1: traveling body

2: turning table

3: cav

4: engine room

5: working machine

5a: boom

5b: arm

5c: bucket

6: front face

6a: vertical plane

6b: slope

7: top plate

8: inner side part

9: rear part

10, 10 ': outer side

10a: 3D curved surface area

10b: cylindrical surface area

11, 11 ': middle filler

12: front filler

13: rear filler

14, 14 ': opening

14a, 14'a: upper part

15, 15 ': middle guide rail

15a, 15'b: intermediate guide rail

15'a: concave groove

16, 16 ': slide door

16a, 16'a: bracket

16b-1, 16b-2: first and second upper guide rollers

16'b: upper guide roller

16c, 16'c: intermediate guide roller

16d, 16'd: bracket

16e: lower guide roller

16'e, 16'f: first and second lower guide rollers

16g, 16'g: lower bracket

17, 17 ': upper rung

18: lower rung

19, 19 ': upper guide rail

19a, 19a ': Square tube part

19a-1, 19'a-1: ceiling

19a-2, 19'a-2: bottom

19a-3: reinforcement plate

19b, 19'b: upper guide rail

20, 20 ': Lower guide rail

20a, 20'a: lower guide rail

20'b: rolling surface forming member

20'b-1: Roller raceway

21: 2D curved surface area

a: line segment

a1: border

R1, R2: radius of curvature

A: Bottom position of the cab shear edge

B: Bottom position of the slide door shear edge

C: Bottom position of the trailing edge of the slide door

This object is achieved by the first to fourth inventions of the cabs of claims 1 to 4 and the fifth invention of the construction machine of claim 5.

The cab of the first aspect of the invention is provided with a revolving stand on the lower traveling body, is provided at a position biased from the revolving center of the revolving stand, and is formed as a curved surface in which the outer side surface portion is expanded outward, and at the same time the slide door In the cab of a construction machine provided with a surface, the curvature radius of the latter half part of the said outer side surface part is set smaller than the curvature radius of the front part.

Now, if the entire curved surface region of the outer side portion of the cab is constituted by a portion of a cylindrical body having the same radius of curvature, and the rear end of the outer side portion is provided with the cab so that the latter half of the region is inside the circumferential edge portion of the turning table, As described above, when the slide door is opened, the rear end of the door protrudes outward from the turning radius of the swing table. To avoid this, if the guide roller disposed at the center of the rear edge of the slide door is fastened to the guide rail disposed at the rear portion of the outer side of the cab so that it does not protrude outward, the front edge of the slide door will protrude outward. Throw it away.

Therefore, normally, even when the slide door is opened, the interior volume of the front face of the driver's seat is secured, and the mounting position of the outer rear end of the cab is set so that the rear end thereof does not protrude from the turning radius of the turning table. As a result, in particular, the interior width behind the seating portion of the cab becomes extremely narrow, which often results in great pressure on the operator.

In contrast, in the first aspect of the present invention, the radius of curvature at the rear half of the outer side of the cab is set to be smaller than the radius of curvature of the first half, and the rear end installation position of the outer side of the cab is set to the inside of the pivot table by the thickness of the door. At the same time, when the slide door is opened, the rear end of the door is actively guided along the lower half of the radius of curvature of the outer side, and the front edge of the slide door is actively guided along the surface of the outer side, thereby opening the door. Also in the city, the rear half of the cab can be made as wide as possible without protruding the rear end outward from the turning radius of the turning table. In other words, instead of making the volume of the rear half of the cab at least small, the first half of the driver actually feels the width of the cab, in other words, the front volume of the driver is made as large as possible. In addition, the radius of curvature of the latter half portion may be constant or may be gradually reduced from the front side to the rear side of the latter half portion.

In the second aspect of the present invention, in the first aspect of the present invention, the front window portion is formed as an inclined surface that is inclined toward the rear side from the side, and at least the front half portion of the outer side surface portion that extends rearward from the outer edge of the front window portion is installed. The upper region has an arc-shaped cross-section perpendicular to the vertical line, and is formed in a three-dimensional curved surface shape that is gradually curved three-dimensionally upwards toward the front inclined edge thereof, and the slide door is in the first half of the outer side portion. It has a curved surface substantially the same as that, and the curved region of the latter half portion of the outer side surface portion is formed by an arc surface continuous to the curved region of the first half portion.

The three-dimensional curved surface is set such that, for example, as the circular arc having the same radius of curvature faces upward, the center position thereof is gradually displaced to the rear, and the rear end of the three-dimensional curved surface is positioned on the same vertical line or the circular arc. It is formed by gradually decreasing the radius of curvature of the crystal toward the upper side and setting the rear end of the three-dimensional curved surface on the same vertical line. In addition, the bus bar of the cylinder formed by the said circular arc surface may be a curve.

In the present invention, in particular, the front window portion of the cab is defined as an inclined surface which is inclined rearward from the lower side to the upper side. In this case, the curved shape of the outer side portion of the cab consists of a part of a simple cylindrical body. As described above, the filler provided between the front window portion and the outer side surface becomes larger as the side is moved upward, thereby greatly obstructing the watch on the inclined upper side.

Therefore, in the second invention of the present invention, the front window portion is formed in the rear inclined surface, and the portion following the rear inclined surface in at least the first half of the outer side surface portion is formed in the aforementioned three-dimensional curved surface shape. At this time, the latter half portion of the outer side surface portion is formed as a smoothly continuous curved surface with the boundary line extending in the vertical direction and the three-dimensional curved surface interposed therebetween. The curved surface region of the latter half portion may be constituted by, for example, a part of a single cylindrical body, but the center is gradually moved forward with the same radius of curvature smaller than the radius of curvature of the lower half of the first half while smoothly continuing the three-dimensional curved surface. It can also be formed as the inclined surface inclined inward of the turntable over the upper side.

By this structure, the side surface of the said filler can be made to be a uniform width | variety up and down, and the clock | clock of the upper side can be widened diagonally, and the left and right edges of a cab can be parallel in a front view, and it looks externally Aesthetics are secured. In addition, the curvature radius of the latter half portion is made smaller than the radius of curvature in the first half of the cab, and the front end of the three-dimensional curved surface area inclined toward the inside of the cab is deformed as vertically as possible. Not only can the interior of the cab be as wide as possible in the first aspect of the invention, but also it is possible to prevent the door from protruding outward from the maximum turning radius of the swing table during the opening operation of the slide door.

According to the third aspect of the present invention, for example, the front end of the three-dimensional curved surface area inclined toward the inside of the cab toward the upper side is vertically deformed, so that at the time of the hatchway opening operation of the slide door, the slide It has guide means for deforming the three-dimensional curved surface shape of the door to be a two-dimensional curved shape, that is, a part of a single cylindrical body.

If the three-dimensional curved surface is formed on the slide surface of the slide door, when the door is opened, the front edge of the three-dimensional curved surface is placed on the rear half of the outer side portion, in particular the lower and / or lower front edge of the door The upper edge of the rear edge is to be protruded outward more than when the slide door is a two-dimensional curved surface. In this invention, since the curvature radius of the latter half part of an outer side surface part is set smaller than the curvature radius of a front part as mentioned above, especially these protrusion amount becomes large.

Thus, in the third aspect of the present invention, when opening the slide door having the three-dimensional curved surface, guide means for actively deforming the three-dimensional curved surface to the two-dimensional curved surface are provided on the outer side surface portion. The guide means at the time of opening / closing of a slide door consists of a rolling roller provided in the door side normally, and the guide rail provided in the outer side part part of a cab. The installation position of the said rolling roller and the number of installation thereof are generally three places of the upper and lower edges of the front edge of a slide door, and the three central edges of the rear edge of this door, and the rolling position with respect to the door main body of these rolling rollers is unchanged, especially It is impossible to increase the distance between the roller and the door body during rolling. On the other hand, the guide rail provided on the outer side surface of the cab can forcibly guide the rolling roller during rolling.

Accordingly, in the third aspect of the present invention, for example, the guide trajectory of the guide rail with respect to the electric roller provided on the upper edge of the front edge of the slide door is formed to be gradually pushed outward, and the electric roller provided on the lower edge of the front edge of the slide door is provided. It is formed to pull the guide trajectory of the guide rail for the inside. On the other hand, the transmission roller provided in the center part of the trailing edge of a slide door is restrained and guided by the guide rail provided along the circular arc of curvature radius smaller than the front part of the outer side part.

In other words, during the opening operation of the slide door, the front edge of the front edge of the door is pushed outward, and the bottom edge of the front edge of the door is actively pulled inward, and at the same time, the rear edge portion of the rear edge of the outer side portion of the door is pushed forward. Guide it along the surface. As a result, while the shape of the slide door having the three-dimensional curved surface is deformed to the two-dimensional curved surface, the opening operation of the door is performed along the surface of the outer side surface of the cab, so that the sliding of the door at the time of opening the slide door The entire face is along the rear half surface of the outer side, with the lower edge of the front edge and / or the upper edge of the door being received within the maximum pivot radius of the pivot.

This 4th invention is provided in the site | part which was biased from the turning center of the turning stand, and has the front window part which has the inclined surface inclined toward the rear view from the side, and is installed extended rearward from the outer edge of the front window part, and is perpendicular An outer side surface having a curved surface extending in the entire cross section orthogonal to the outer side, the opening having a required width opening from the upper edge to the lower edge in the curved surface area of the first half thereof, and a sliding door for opening and closing the hatch; In the cab of the construction machine having a, the curved area of the first half of the outer side surface portion which is installed extending from the outer end edge of the inclined surface is arcuate in cross section perpendicular to the vertical line, the radius of curvature gradually toward the upper side It is formed in a narrow three-dimensional curved surface shape, the slide door A curved surface substantially the same as the first half of the outer side portion, the curved region of the second half of the outer side portion has the same curvature over the top and bottom, and is formed of an arcuate surface continuous to the curved region of the first half, the radius of curvature of the three The radius of curvature is set to a radius of curvature substantially equal to the radius of curvature at the lower end of the dimensional curved surface region, and the outer side surface portion is deformed so that the three-dimensional curved surface shape of the slide door becomes a two-dimensional curved shape at the time of opening the door of the slide door. A guide means for guiding is provided.

This invention differs from the said 3rd invention by the point which set the radius of curvature in the latter half part of the said outer side surface part to the radius of curvature substantially the same as the radius of curvature in the lower end of the said three-dimensional curved-surface area | region of the front part. Also in this invention, although the curved surface of the latter half part of an outer side surface part can also be formed in a part of a single cylindrical body like the said 2nd invention, this curved surface may be made to be inclined a little inwardly of the cab as it goes upward. It may be.

In the fourth invention, the amount of protrusion to the outside of the rear end of the door at the time of opening the slide door is smaller than that of the third invention, but the protrusion is still unchanged, and further, the lower edge of the front edge of the door. The amount of protrusions is not different from that of the third invention. Therefore, by deforming the three-dimensional curved surface of the front part of the slide door to the two-dimensional curved surface as in the third invention, the rear end of the slide door does not protrude outward from the turning radius of the turning table even when the door is opened.

The fifth aspect of the present invention provides a swing table on a lower traveling body, is provided at a position shifted from the pivot center of the swing table, and is formed as a curved surface in which the outer side surface portion is expanded outward, and at the same time, a slide door is provided on the outer side surface portion. In the construction machine provided with the cab according to any one of claims 1 to 3, wherein the installation position of the cab is set at the outer edge of the front edge of the cab on the almost maximum turning radius, The lower edge of the front edge and / or the rear edge of the slide door at the time of opening of the hatch is set on the almost maximum turning radius of the swing table.

By adopting such a configuration, as described above, the rear end of the door does not protrude outward from the turning radius of the turning table at the time of opening and closing of the slide door, and furthermore, the opening and closing operation of the door can be performed smoothly. That is, it becomes possible to maximize the space of the driver's front part and side part.

EMBODIMENT OF THE INVENTION Hereinafter, typical embodiment of this invention is described concretely, referring drawings. 1 shows a hydraulic excavator as a construction machine according to the present embodiment. This hydraulic excavator is provided with a revolving stand 2 on the traveling body 1, the cab 3 and the engine room 4 are provided on the revolving stand 2, and the work machine 5 is mounted. The work machine 5 includes a boom 5a (boom) whose base is pivotally supported on the pivot center of the swing table 2, an arm 5b pivotally supported at the tip of the boom 5a, It consists of the bucket 5c etc. which were pivotally supported by the front-end | tip of this arm 5b. The said cab 3 is provided so that it may shift to the right side of the said work machine 5 on the turntable 2 from the front.

2 and 3, the cab 3 is formed in a box shape of a substantially rectangular parallelepiped, and the front face portion 6 has a vertical surface 6a which rises almost vertically from a lower end to a height position of approximately one third. And an inclined surface 6b which is inclined upwardly from the upper end of the vertical surface 6a to the top plate portion 7, and the plate glass or transparent resin plate is fitted to the vertical surface 6a and the inclined surface 6b, respectively. Put in. Therefore, the front face part 6 has a substantially square shape when viewed from the side. In addition, the inner side surface portion 8 and the rear portion 9 on the left side, respectively, are viewed from the front side, and each has a vertical surface, and a plate glass or a transparent resin plate is sandwiched in the upper side of each panel or less than that. Thus, the front surface part 6 is inclined backward, in order to secure the upper clock and to avoid the interference between the work machine 5 and the cab 3.

On the other hand, the outer side surface portion 10 which connects between the outer edges of the front surface portion 6 and the rear surface portion 9 as viewed from the front is a curved surface which is expanded outward. According to this embodiment, the intermediate pillar 11 is located in the position of about 2/3 of the front-back width from the front end in the lower end of the said outer side part 10, The rear end of the front-side pillar 12, and the said intermediate | middle Between the front end of the filler 11, the opening part 14 for worker lifts is formed, and comprises the first half part of this invention. In addition, the upper half of the panel between the intermediate pillar 11 and the rear pillar 13 is fitted with a plate glass or a transparent resin plate, the lower side of the intermediate guide rail portion 15 of the slide door 16 extending horizontally ) Is formed.

In the present embodiment, the first half of the cab outer side surface portion 10 is constituted by a single cylindrical surface region 10b from the lower end of the opening portion 14 to a height position of approximately one third, and approximately 2 / of the remaining upper side. 3 is comprised by the three-dimensional curved surface area | region 10a. In addition, the second half of the cab outer side surface portion 10 is composed of a two-dimensional curved region 21 smoothly continuous to the cylindrical surface region 10b and the three-dimensional curved region 10a. 4 schematically illustrates a three-dimensional view and a plan view of the cab for explaining the shape of the outer side surface portion 10. In this figure, in order to make it easy to understand, the front half of the outer side part 10 is made into the said three-dimensional curved-surface area | region 10a in the arc (front and rear) direction, and the perpendicular | vertical surface of the said cylindrical surface area | region 10b and the front surface part 6 is shown. Although 6a is not shown in figure, even if it is embodiment shown to FIG. 2 and FIG. 3 which has such a structure, the effect of this invention can be acquired, of course. Hereinafter, the shape of the outer side surface portion 10 will be described in detail with reference to FIG. 4.

The three-dimensional curved region 10a and the two-dimensional curved region 21 are divided by vertical boundary lines a1 as viewed from the side. This boundary line a1 is on the line segment a when seen from the upper surface. When the driver is seated in a cab inside the driver's seat (not shown), the driver's elbow is positioned near the line segment a. The three-dimensional curved region 10a has a lower front edge at the approximately maximum turning radius of the pivot table 2, and the front end of the three-dimensional curved region 10a from the lower front edge has a front pillar 12. As viewed from the front, it is raised obliquely to the rear so as not to protrude out of the cab 3.

Then, the curvature radius is gradually reduced (from the lower curvature radius R1 to the upper curvature radius Rn) between the rear end edge and the lower end from the lower end to the inclination, and the rear end is respectively The boundary line a1 has a three-dimensional curved shape smoothly connected with an arc of a radius of curvature R2 inscribed in the two-dimensional curved surface area 21. In addition, although the boundary line a1 is made substantially perpendicular in this embodiment, in FIG.4 (a), it inclines inward from the upper side of the cab 3 for description. Here, in the shape of the cab shown, R1> Rn> R2, and in order to smoothly continue the outer side surface portion 10 of the cab 3 back and forth, the arc of curvature radius (R1) of the lower end of the first half, The centers O1, On and O2 of the arc of this upper radius of curvature Rn and the arc of the second half radius of curvature R2 are on the line segment a, and the rear end of the first half on the boundary line a1. The edge and the front edge of the latter half are designed to inscribe in an arc having a radius of curvature R1 at the bottom of the first half.

The effect by the above-mentioned structure in the front half of the said outer side part 10 is as follows.

First, the lower edge of the front edge of the three-dimensional curved area 10a, that is, the lower edge of the front edge of the cab 3, is positioned on the maximum turning radius of the swing table 2. This is, for example, compared to the case where the lower end of the cab is located at a portion smaller than the maximum turning radius of the turning table, as described in Japanese Patent Laid-Open Publication No. 2722055, which has already been described. Assuming that 3) is within the turning radius of the turning table 2, it is possible to secure a larger front surface area. This leads to an enlargement of the front field of view and the driver's comfort as the cabin interior volume increases. In addition, the front end of the three-dimensional curved surface region (10a) from the lower end to the upper end, so that the front side filler 12 to which the front end is connected to be inclined backward so as not to protrude out of the cab (3) from the front surface. By raising, the aesthetics seen from the front surface is also improved.

Moreover, the front end of the outer side surface portion 10 shown in FIG. 4, that is, the front end of the three-dimensional curved surface region 10a is inclined toward the inside of the cab toward the upper side, whereas the boundary line a1, that is, the three-dimensional curved surface. The rear end of the surface area 10a is almost a vertical line (as shown in Fig. 4 (a), the boundary line a1 is slightly inclined toward the inside of the cab as it goes upward). Conventionally, when the front side part 6 is inclined and the outer side part 10 is made into the shape similar to a cylindrical body, when it balances so that a front part pillar may not protrude to the outer side of a cab when seen from the front surface, the above-mentioned Japanese utility model mentioned above. As in the registration No. 2526933, it was necessary to incline the upper side of the outer side surface portion inward. In addition, when the cab is equipped with a slide door, the surface shape of the slide door has a shape similar to a cylinder or a cylinder for opening and closing the cab. As a result, it was necessary to incline to the inside of the outer side surface portion at least on the entire surface on which the slide door slides.

Compared with this prior art, in the present invention, since the inclination toward the inside of the cab above the three-dimensional curved area 10a is gradually decreased from the front end to the rear end, the inside volume of the cab, in particular, the driver is seated in the driver's seat in the cab. Since the inside volume of the cab which can be visually recognized while doing so increases, the comfort of driving improves. However, if the above-described configuration of the outer side portion 10 is adopted, the lower edge of the front edge or the upper edge of the rear edge of the slide door protrudes outwardly of the cab 3 when opening and closing the slide door. The problem arises that the cab 3 is not received within the turning radius. The solution to this problem will be described later.

On the other hand, the latter half part which bordered the boundary line a1 of the said outer side part 10 is comprised by the single cylindrical surface which has the same radius of curvature R2 over the top and bottom of the cab 3. As described above, the radius of curvature R2 is set to be smaller than the radius of curvature R1 of the cylindrical surface region 10a of the first half portion, and the first half of the outer side surface portion 10 is disposed between the boundary lines a1. Inscribe. In the present embodiment, the latter half portion is constituted by a single cylindrical surface having the same radius of curvature R2, but the latter half is displaced forward as the center of the circular arc having the same radius of curvature R2 is directed upward, The upper edge may be configured to be slightly inclined to the inside of the cab 3.

In addition, the upper and lower guide rails for guiding the opening and closing operation of the slide door 16 between the front end of the upper and lower cross bars 17 and 18 disposed at the upper and lower ends of the outer side surface part 10 to the intermediate pillar 11. (19, 20) are provided. The specific structure of these guide rail parts 15, 19, and 20 is demonstrated in detail later.

In the said embodiment of the cab 3, the form of the slide door 16 also has the same curved surface form as the front half part in the outer side part 10 of the cab 3. That is, from the lower end of the slide door 16 to the height of 1/3 is composed of a portion of the cylindrical body having an arc surface parallel to the arc surface of the radius of curvature R1, the upper side of the upper edge of the radius of curvature Rn It has a three-dimensional curved surface shape in which the radius of curvature gradually decreases upward to form an arc parallel to the arc.

Electric rollers are attached to the upper and lower ends of the front edge and the lower and front edges of the slide door 16, respectively, and the upper and lower sides of the upper and lower sides provided on the outer side surface part 10 of the cab 3 as described above. While supporting the guide rails 19, 15, 20, the slide door 16 is opened and closed. The support structure of the slide door by the said rollers and guide rail parts 15, 19, and 20 in this embodiment is demonstrated concretely, referring FIG. 5 and FIG. 6, comparing with the support structure of the conventional slide door. do. FIG. 5 shows the support structure of the slide door 16 according to the present embodiment, and FIG. 6 shows the support structure of the conventional slide door 16 '.

First, a concrete example of the supporting structure of the conventional slide door 16 'will be described with reference to FIG. 6, and FIG. 6 (a) shows the slide door 16 with respect to the outer side portion 10' of the cab 3 '. The support structure of the upper end of (') is shown, and the upper guide rail part 19' is provided in the lower end of the upper cross bar 17 '. The upper guide rail portion 19 'has a rectangular cross section, and is configured as a rectangular tube portion 19'a in which a lower end corner portion on the outside thereof is largely missing. An upper U-shaped upper guide rail 19'b is fixed to the ceiling portion 19'a-1 along the upper edge portion 14'a of the opening 14 '. On the other hand, the upper portion of the front edge of the slide door 16 'is provided with a bracket 16'a protruding substantially horizontally from the inner surface toward the outer side surface portion 10' of the cab 3 ', and at the tip end of the slide door 16'. An upper guide roller 16'b which is fitted to the upper guide rail 19'b and rolls around the vertical axis is attached.

Fig. 6 (b) shows an intermediate slide door support structure, and the support structure of the slide door 16 'is the same as the support structure of the slide door 16 according to the present embodiment described above, and the cab 3' The intermediate guide rail part 15 'formed in the latter half part of the outer side surface part 10' of (), and the intermediate guide roller 16'c which are fitted and attached to this intermediate guide rail part 15 'so that a rotation is possible. The intermediate guide rail portion 15 'is fixed along the bottom surface of the concave groove portion 15'a formed horizontally in the horizontal direction at the center of the rear half portion of the outer side portion 10' and the concave groove portion 15'a. It is comprised by the intermediate guide rail 15'b of an inverted U-shaped cross section. One intermediate guide roller 16'c is rotatable around the vertical axis and swings back and forth in the bracket 16'd, which projects horizontally from the rear center of the slide door 16 'toward the cage 3'. Possibly pivotally supported.

Fig. 6 (c) shows the lower support structure of the slide door 16 'at the lower end, which is the intermediate pillar 11' from the lower front end of the outer side portion 10 'of the cab 3'. The first and second guide rails 20 'extending to the lower end of the front end of the slide door 16' and mounted on the lower guide rails 20 'in a rotatable manner. 2 consists of lower guide rollers 16'e and 16'f. The lower guide rail portion 20 'is a concave groove-shaped guide rail 20'a extending to the middle pillar 11' on the rear surface of the bottom surface of the cab 3 ', and perpendicular to the rear surface of the bottom surface. It is comprised by the cross-sectional L-shaped rolling surface formation member 20'b provided in this way.

In addition, the first and second lower guide rollers 16'e and 16'f are mounted on the lower end of the front end of the slide door 16 'and have a horizontal cross-shaped L-shape protruding horizontally toward the cab 3'. It is supported so that the transmission shaft is orthogonal to the distal end of the lower bracket 16'g. The first lower guide roller 16'e, which rotates around the vertical axis, is rotatably fitted to the concave groove guide rail 20'a, and the second lower guide roller 16 that rotates around the horizontal axis. 'f) is rotatably mounted on the roller transmission surface 20'b-1 of the cross-sectional L-shaped transmission surface forming member 20'b.

The support structure of the conventional slide door 16 'is as described above, and the upper support structure of the slide door 16' is obtained by simply placing the upper guide roller 16'b on the top of the panel of the outer side portion 10 '. The cross section fixed to the crosspiece 17 'is only inserted from the lower side into the inverted U-shaped guide rail 19'b and guided by electric guide. In addition, the intermediate support structure has the intermediate guide roller 16'c at the outside. It is fitted to the guide rail part 15 'formed horizontally in the panel rear part of the side part 10', and is electrically guided. As for the lower support structure of the slide door 16 ', the first lower guide roller 16'e, which rotates around the vertical axis, is electrically guided in the concave groove guide rail 20'a. And the second lower guide roller 16'f which rotates around the horizontal axis is electrically guided on the roller transmission surface 20'b-1 of the cross-sectional L-shaped transmission surface forming member 20'b.

Thus, also in the conventional slide door 16 ', each guide roller 16'b. 16'c and 16'e provided in three places of the front upper part, lower front end, and rear end edge of the slide door 16'; Each of the guide rails 19'b. 15 'and 20'a and the roller raceway 20'b, each of which 16'f extends along the upper and lower centers of the first half of the cab 3', the first half of the first half, and the top and bottom centers of the second half, respectively. -1) is guided and slides.

Here, as shown in Fig. 4A, if the front window portion of the cab 3 is inclined rearward, the shape of the outer side portion 10 is formed as a three-dimensional curved surface as described above. If present, the upper and lower end edges of the first half of the cab 3 are viewed in the plane shown in Fig. 4 (b), and the upper end edge draws an arc of small radius of curvature from the front end to the rear end, The end edge draws an arc with a radius of curvature greater than the radius of curvature of the upper end edge from the front end to the rear end thereof, and both arcs merge on the boundary line a1 at the rear end, and then in the latter half of the cab 3 '. It leads to an arc.

In this case, the upper and lower guide rails 19'b, 15 'and 20'a, the upper and lower guide rollers 16'b and 16'c, the first lower guide roller 16'e and the rollers The guide trajectory of the second lower guide roller 16'f that drives the raceway 20'b-1 is such that the intermediate guide roller 16'c is located along the curved surface of the latter half of the outer side face 10 '. The upper guide roller 16'b, which is guided to the rear end of the 10 'and enters the inside of the cab 3', is guided along the small arc to the vicinity of the boundary line a1, and at this time, the slide door ( If the first lower guide roller 16'e at the lower end disposed on the outermost side of the cab 3 'is guided up to the boundary line a1 without deforming 16'), it is indicated by a broken line in Fig. 7C. As shown, the lower end of the front edge of the slide door 16 'protrudes significantly outward.

Therefore, if the lower end of the front edge of the slide door 16 'is to be accommodated within the turning radius of the pivot not shown when the slide door 16' is opened, the projection of the lower end of the front edge of the slide door 16 'is accommodated. The curvature of the curved surface must be determined so as to accommodate the outer side portion 10 'of the cab 3' within the turning radius by the amount, so that the interior volume of the cab 3 'becomes narrow. This is irrelevant whether or not the radius of curvature of the second half of the outer side portion 10 'is equal to the radius of curvature of the first half.

On the other hand, the support structure of the slide door 16 which concerns on embodiment of this invention solves the above-mentioned problem, Furthermore, the curvature radius of the latter half part of the outer side part 10 which is the feature of 1st invention is the curvature of the front part. By adopting a structure smaller than the radius and reducing the amount of protrusion to the outside of the slide door 16 as much as possible, it is possible to maximize the left and right widths of the cab 3 within the turning radius of the turning table 2. At the same time, a function that enables smooth opening and closing operation of the slide door 16 is exerted.

FIG. 5 shows an example of the first support structure of the slide door 16 according to the present embodiment, and where the conventional support structure differs greatly from the conventional support structure, the slide door 16 'is described as described above. In the support structure according to the present embodiment, the entire slide door 16 is hung on the upper guide rail portion 19 while the mounting structure is mounted on the lower guide rail portion 20 provided at the lower end of the cab 3 '. The point which adopts the suspension method to support is another thing, The other point is the guide trajectory of the upper guide roller in the upper guide rail part substantially the same as the circular arc of the curvature radius R1 along the lower edge of the cab 3. While pushing so as to follow an arc having a radius of curvature, the guide trajectory of the first lower guide roller in the lower guide rail portion is made to follow the same arc as the arc along the lower edge of the cab 3. Is the cab (3) is pulled tight with respect to, the conventional guide roller was a simple cylindrical side, to the point that all of the guide rollers in this support structure with pristine (太 鼓) shape.

This is explained concretely based on FIG. Moreover, the guide roller 16 in the intermediate position provided with the intermediate guide roller 16 which fits and is attached to the intermediate guide rail part 15 formed in the latter half part of the outer side part 10 of the cab 3 so that it may rotate freely. The supporting structure of is substantially the same as the supporting structure of the above-mentioned conventional guide roller 16 'except that the guide roller shape is burnt and shaped as described above, and therefore the description thereof is omitted here.

5 (a) shows the upper support structure of the slide door 16 according to the present embodiment, the upper guide rail portion 19 disposed in the lower end of the upper crosspiece 17 forms a rectangular frame shape in cross section, The bottom portion 19a-2 is extended to the outside than before, and is configured as a square cylinder portion 19a in which the lower end corner portion of the outer side is smaller than the conventional one. On the upper surface of the bottom portion 19a-2, a reinforcing plate member 19a-3 is provided to reinforce the guide roller raceway. In addition, an upper U-shaped upper guide rail 19b is fixed to the ceiling portion 19a-1 of the square tube portion 19a along the upper edge 14a of the opening portion 14 as in the related art. A horizontal L-shaped support bracket 16a protrudes substantially horizontally from the inner side toward the outer side portion 10 of the cab 3 from the inner side of the front edge of one slide door 16. At the front end, the first upper guide roller 16b-1, which freely rotates around an approximately vertical axis attached to the upper guide rail 19b, and the second upper guide roller 16b-2, which freely rotates around a horizontal axis, are perpendicular to each other. It is installed.

The first upper guide roller 16b-1 is fitted to the reverse U-shaped upper guide rail 19b disposed on the ceiling 19a-1 of the square tube portion 19a, and slides the door 16. Electric motor while suppressing shaking in and out of the cab. Moreover, the said 2nd upper guide roller 16b-2 is electric-rolled in the state mounted on the guide roller transmission surface of the upper surface of the reinforcement board 19a-3 of the each cylinder part 19a. Therefore, most of the total load of the slide door 16 which concerns on this embodiment is supported by the guide roller transmission surface of the upper surface of the said reinforcement board 19a-3.

On the other hand, the trajectory of the inverted U-shaped upper guide rail 19b which electrically guides the first upper guide roller 16b-1 is the first upper guide roller at an initial stage during the opening operation of the slide door 16. It protrudes outward large at first so that 16b-1 may shift over the circular arc which has the same radius of curvature as the circular arc which the lower end part of the outer side part 10 forms, and the slide door at the end of opening of the slide door 16 is completed. In order for the 16 to be smoothly mounted on the end formed by the front surface of the intermediate pillar 11, the curved portion is set to protrude outward while bending in a shape along the front surface of the intermediate pillar 11. Therefore, the upper end of the upper guide rail 19b when the front upper end of the slide door 16 according to the present embodiment quickly reaches the same arc as the arc formed by the lower edge of the first half of the outer side part 10. It is set to connect to an arc of a large radius of curvature leading to a curved line having a small radius of curvature.

In this way, if the trajectory of the upper guide rail 19b is set, the three-dimensional curved area formed in the upper part of the front side of the slide door 16 brings a deformation close to the two-dimensional curved shape (cylindrical surface). The first upper guide roller 16b-1 and the second upper guide roller 16b-2 for rolling on the guide roller raceway on the upper surface of the bottom portion 19a-2. While the support bracket 16a is inclined slightly downward rather than horizontally to be fixed to the door, the shape of each circumferential surface of the first and second upper guide rollers 16b-2 is in the shape of a wild shape, Contact is always made to be in point contact, so that friction during transmission is minimized, and smooth opening and closing operation is enabled even by deformation of the slide door 16.

FIG. 5 (b) shows the bottom support structure of the slide door 16 according to the present embodiment, which is the front of the intermediate pillar 11 from the lower edge of the front edge of the outer side portion 10 of the cab 3. Lower guide groove 20 extending arcuately extending to the lower side, and lower guide roller 16e mounted on the lower edge of the front edge of the slide door 16 and fitted into the lower guide groove 20 so as to be electrically movable. Is made of. The guide groove 20 is formed on the back of the bottom peripheral edge of the cab 3. In addition, the lower guide roller 16e is pivotally supported by the front end of the L-shaped bracket 21 fixed to the lower edge of the front edge of the slide door 16. The lower guide roller 16e which rotates around this vertical axis | shaft is attached to the lower guide groove part 20 so that rotation is possible. Moreover, in this embodiment, since each support bracket of all the guide rollers arrange | positioned at the upper and lower sides is mounted so that the slide door can be rocked around a vertical axis, opening and closing of the slide door 16 can be operated more smoothly and easily. To make it work.

If the guide trajectory of the first upper guide roller 16b-1 is simply a circular arc having the same radius of curvature as the circular arc along the lower edge of the three-dimensional curved surface region 10a, the lower guide roller 16e as described above. Greatly protrudes outward. Thus, as already explained, in the initial stage of the opening operation of the slide door 16, the first upper guide roller 16b-1 is guided to move over an arc having the same radius of curvature as the lower edge of the first half of the outer side portion 10. In this embodiment, the lower guide roller 16e is brought closer to the cab 3, but since the projection amount cannot be effectively reduced by itself alone, the lower guide roller 16e is further replaced by the cab ( In order to approach the 3) side, the guide track of the lower guide groove 20 is set so as to actively pull the lower guide roller 16e toward the cab 3 side as much as possible.

According to this embodiment, in addition to the function by the support mechanism mentioned above, by effectively utilizing the structure which made the radius of curvature in the latter half part of the outer side part 10 which is a characteristic part of this 1st invention smaller than the radius of curvature of the first half part, The left and right widths of the cab 3 can be made as large as possible.

FIG. 9 shows the movement trajectory of the slide door 16 when the curved surface of the rear half of the outer side surface portion 10 of the cab 3 is composed of a cylindrical surface equal to the radius of curvature R1 at the lower end of the front half. Will be painted. In this figure, the area | region enclosed by the dashed-dotted line shows the surface of the outer side part 10 of the cab 3, and the part shown with the dashed-dotted line in this figure has shown the turning area | region of the turntable 2. As shown in FIG. When the radius of curvature at the second half of the outer side surface portion 10 is equal to the radius of curvature R1 of the first half, for example, as described above, the support guide for deforming the three-dimensional curved surface of the slide door 16 to the two-dimensional curved surface. Even when the structure is adopted, since the rear edge of the door 16 moves along an arc surface having the same radius of curvature as the outer side surface portion 10 when the slide door 16 is opened, as shown in FIG. The rear edge of the door 16 protrudes outward as the radius of curvature is large. As a result, when this trailing edge is accommodated inside the maximum turning radius of the turning table 2, the entire curved surface including the front and rear center portions and having the same radius of curvature in the outer side surface portion 10 is within the maximum turning radius. It must be accommodated, leading to a reduction in the effective space of the cab 3. And since the whole outer side part 10 is similar to a part of single cylinder, the opening-closing operation of the slide door 16 is made smooth.

On the other hand, the radius of curvature R2 of the rear half of the outer side surface portion 10 is made smaller than the radius of curvature R1 of the first half, and the rear end edge of the slide door 16 is forced along the surface of the second half by the supporting mechanism of the center portion. As shown in FIG. 9, the rear end edge of the slide door 16 can be biased to the inside of the turning radius than when the radius of curvature of the rear half and the radius of curvature of the first half are the same. The amount of protrusion to the outside of the cab of the lower edge of the front edge of the slide door 16 indicated by broken lines in the dashed line increases significantly. Therefore, by adopting the support mechanism and making the radius of curvature R2 of the rear half of the outer side surface portion 10 smaller than the radius of curvature R1 of the first half, the entire curvature of the outer side surface portion 10 is within the same turning radius. It is possible to shift the surface outward than when the radius of curvature of the first half of the slide door 16 and the radius of curvature of the second half are the same, and the interior volume of the cab 3 can be increased.

8 shows the movement trajectory of the slide door 16 when the installation area of the cab 3 according to the present invention that can be accommodated within the maximum turning radius of the swing table 2 is maximized. In this figure, the area | region enclosed by the dashed-dotted line shows the surface of the outer side part 10 of the cab 3, and the part shown with the dashed-dotted line in this figure has shown the turning area | region of the turntable 2. As shown in FIG.

As can be understood from this figure, in order to determine the installation position of the cab 3 according to the present embodiment on the swivel table 2, the position A at the lower edge of the front edge of the cab 3 is first turned into the pivot area. Set on the outermost circumference of. Subsequently, the position B at the lower edge of the front edge of the door when the slide door 16 is fully opened is similarly set on the outermost circumference of the swing area. Finally, the position C at the lower end of the trailing edge of the door when the slide door 16 is fully opened is similarly set within the outermost circumference of the turning area. The position C at the lower end of the trailing edge of the door when the slide door 16 is fully opened is determined by the radius of curvature of the latter half of the outer side surface portion 10.

Although the above description has been made with respect to typical embodiments of the present invention, the present invention is not limited to the above embodiments, for example, as a support structure of a slide door, forcibly guiding the upper and lower ends of the front edge of the door to the outside and the inside. In addition, it is also possible to adopt the same structure as in the prior art, and the shape of the latter half of the outer side of the cab is not a simple cylinder, but gradually decreases its radius of curvature and moves its center position forward as it goes upward. It can also be formed as a three-dimensional circular arc surface, and various modifications are possible.

According to the present invention, it is possible to increase the effective space of the cab inside as much as possible while smoothly opening and closing the slide door, without causing the door to protrude outward from the maximum turning radius of the turning table during the opening and closing operation of the slide door. have.

Claims (5)

A turning table is provided on the lower traveling body, and is provided at a position displaced from the turning center of the turning table, and is formed as a curved surface in which the outer side surface portion is expanded outward and a slide door is provided on the outer side surface. In the cab of the construction machine The curvature radius of the latter half part of the said outer side surface part is set smaller than the curvature radius of the front part, The cab of the construction machine. The method of claim 1, wherein the front window is formed of an inclined surface inclined toward the rear when viewed from the side, At least the upper region of the first half of the outer side portion, which extends rearward from the outer edge of the front window portion, has an arcuate cross-section orthogonal to a vertical line, and upwards 3 toward the front inclined edge thereof. Is formed into a three-dimensional curved surface shape gradually curved in dimensions, The slide door has a curved surface that is substantially the same as the first half of the outer side surface portion, The curved region of the latter half portion of the outer side portion is formed of a circular arc surface continuous to the curved region of the first half of the construction machine. The said outer side part part is provided with the guide means which guides deformation | transformation so that the three-dimensional curved surface shape of this slide door may become a two-dimensional curved shape at the time of the opening opening of the slide door. Cab of construction machinery. A front face window portion provided at a portion biased from the pivot center of the swing table, the inclined surface being inclined toward the rear side from the side, and the front end portion extending rearward from the outer edge of the front window portion, and the whole cross section perpendicular to the vertical line. A construction surface having an outer side surface portion having a curved surface extending outwardly and having a hatch opening from the top edge in the curved surface region of the first half portion to the bottom edge, and a slide door for opening and closing the hatch. In the cab, At least the upper region of the curved area of the first half of the outer side portion extending backward from the outer edge of the inclined surface is arcuate in cross-section orthogonal to a vertical line, and is three-dimensional upward inward toward the front inclined edge. Is formed in a three-dimensional curved surface shape that is gradually curved, The slide door has a curved surface that is substantially the same as the first half of the outer side surface portion, The curved region of the latter half portion of the outer side portion has the same curvature over the top and bottom, and is formed of an arcuate surface continuous to the curved region of the first half portion, the radius of curvature of which is substantially equal to the radius of curvature at the lower end of the three-dimensional curved surface region. Is set to the same radius of curvature, And the outer side surface portion is provided with guide means for guiding deformation of the slide door so that the three-dimensional curved surface shape of the slide door becomes a two-dimensional curved shape at the time of the door opening operation of the slide door. It is provided with a revolving stand on the lower traveling body, is provided at a position displaced from the revolving center of the revolving stand, and is formed as a curved surface in which the outer side surface portion is expanded outward, and has a cab having a slide door at the outer side surface. In construction machinery, The installation position of the cab is set at the bottom edge of the front edge of the cab and / or the rear edge of the cab at almost the maximum turning radius, and the front and rear edges of the slide door at the time of opening of the hatch are almost the maximum turn of the pivot. Construction machinery, characterized in that set on the radius.