JP6607754B2 - Construction machinery cab - Google Patents

Description

  The present invention relates to a cab (operation room) of a construction machine such as a crane.

  Patent Document 1 discloses a crane that is a construction machine. In this crane, a cab is disposed on the vehicle body, and the cab is located on the right side with respect to the boom. When the cab is positioned on the right side with respect to the boom, the door is attached only to the right side panel whose outer surface faces the right side, and the door is not attached to the left side panel whose outer surface faces the left side. A right door cab is used.

Japanese Patent No. 5707069

  In Patent Document 1, the outer surface of the left side (opposite side of the door) has a planar shape substantially parallel to the vertical direction, while the right side (the door is The outer surface of the (positioned side) is formed in a curved shape that inclines inward as it goes upward. As described above, the outer surface on the left side and the outer surface on the right side are formed, so the front panel, roof panel, and rear panel that connect the right side panel and the left side panel in the cab are asymmetric in the left-right direction. Become. Here, in addition to the right door type used in the crane as in Patent Document 1, the cab includes a left door type in which a door is attached only to the left side panel, and a door on both the right side panel and the left side panel. There is a double door type that can be mounted. When the front panel, the roof panel, and the rear panel are formed asymmetrically as in Patent Document 1, the front panel, the roof panel, and the rear panel cannot be shared in the right door type, left door type, and both door type cabs. Therefore, it is necessary to form each of the front panel, the roof panel, and the rear panel using different press dies for each type of cab, which increases costs and labor in manufacturing the cab.

  The present invention has been made paying attention to the above-mentioned problems, and an object of the present invention is to provide a cab that can reduce manufacturing costs and labor.

In order to achieve the above object, a cab for a construction machine according to an aspect of the present invention includes a right side panel whose outer surface faces the right side, a left side panel whose outer surface faces the left side, and an outer surface forward. The right side panel and the left side panel, and a front panel formed in a bilaterally symmetric shape, an outer surface facing upward, and the right side panel and the left side A roof panel formed in a symmetrical shape with the panels and an outer surface facing the rear side, and a connection between the right side panel and the left side panel to form a symmetrical shape. A rear panel formed, and the right side panel is extended over at least the upper half of the outer surface of the right side panel toward the upper side. The left side panel is extended over at least the upper half of the outer surface of the left side panel. A left side curved surface formed in a curved shape inclined at the same curvature radius as the right side curved surface toward the inside toward the upper side; a first side that is one of the right side panel and the left side panel The side panel includes a door, and the second side panel, which is one of the right side panel and the left side panel, which is different from the first side panel, is not provided with a door, and the second side panel The side panel includes a recess whose outer surface is recessed inward in the left-right direction, and the recess extends from a rear end to the front side on the outer surface of the second side panel. With the selfish extended, it extends toward the lower end to the upper side, and in the second side panel, the right side curved surface or the left side curved surface is formed at a portion other than the recess, the second In the side panel, a welded portion is not formed between a portion other than the recess and the recess, and the recess and the portion other than the recess are integrated.

  According to the present invention, it is possible to provide a cab that can reduce manufacturing costs and labor.

It is the schematic which shows the crane which concerns on 1st Embodiment. The cab which concerns on 1st Embodiment, (a) is the schematic seen from the upper side, (b) is the schematic seen from the back side, (c) is the schematic seen from the right side, (d) Is a schematic view viewed from the front side, and (e) is a schematic view viewed from the left side. It is the schematic which expands and shows the state which looked at the cab which concerns on 1st Embodiment from the front side. (A) is schematic which shows the positional relationship of the cab and the boom about the width direction of the traveling vehicle body which concerns on a comparative example, (b) is the cab and boom about the width direction of the traveling vehicle body which concern on 1st Embodiment. FIG. The cab which concerns on 2nd Embodiment, (a) is the schematic seen from upper side, (b) is the schematic seen from the right side, (c) is the schematic seen from the front side, (d) Is a schematic view viewed from the left side, and (e) is a schematic view viewed from the rear side. It is the schematic which shows an example of the crane in which the cab which concerns on 3rd Embodiment is used. The cab which concerns on 3rd Embodiment, (a) is the schematic seen from upper side, (b) is the schematic seen from the back side, (c) is the schematic seen from the right side, (d) Is a schematic view viewed from the front side, and (e) is a schematic view viewed from the left side.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. 1 to 4A and 4B. FIG. 1 is a diagram illustrating a crane 1 which is a construction machine according to the present embodiment. As shown in FIG. 1, the crane 1 includes a traveling vehicle body 2 and a revolving body 3 that is installed on the traveling vehicle body 2 so as to be capable of turning. A boom 5 is attached to the swivel body 3 so as to be raised and lowered. A cab (operating chamber) 7A is installed on the revolving unit 3.

  Here, in FIG. 1, the directions of the arrows V1 and V2 are the vertical directions of the traveling vehicle body 2 and the cab 7A. One side in the vertical direction (arrow V1 side) is the upper side of the traveling vehicle body 2 and the cab 7A, and the opposite side (arrow V2 side) is the lower side of the traveling vehicle body 2 and the cab 7A. In FIG. 1, the arrow P1 side is the front side of the traveling vehicle body 2 and the cab 7A, and the arrow P2 side is the rear side of the traveling vehicle body 2 and the cab 7A. In FIG. 1, the direction perpendicular to the paper surface is the width direction of the traveling vehicle body 2 and the cab 7A. One side in the width direction is the right side of the traveling vehicle body 2 and the cab 7A, and the opposite side to the right side is the left side of the traveling vehicle body 2 and the cab 7A. In the crane 1 of FIG. 1, a cab 7 </ b> A is installed on the right side of the traveling vehicle body 2 with respect to the swing body 3 and the boom 5.

  FIG. 2 is a diagram showing the configuration of the cab 7A. 2, (a) is a view seen from the upper side (arrow V1 side), (b) is a view seen from the rear side (arrow P2 side), and (c) is seen from the right side (arrow W1 side). (D) is the figure seen from the front side (arrow P1 side), (e) is the figure seen from the left side (arrow W2 side). As shown in FIGS. 2A to 2E, the cab 7A includes a front panel 11 whose outer surface faces the front side, a rear panel 12 whose outer surface faces the rear side, and a roof panel whose outer surface faces the upper side. 13, a right side panel 15A whose outer surface faces the right side, and a left side panel 16A whose outer surface faces the left side. The front panel 11, the rear panel 12, the roof panel 13, the right side panel 15A, and the left side panel 16A are each formed by a press mold, and these are assembled to form the cab 7A.

  In the cab 7A, an internal space is formed between the right side panel 15A and the left side panel 16A in the width direction, and the front panel 11, the rear panel 12, and the roof panel 13 are provided between the right side panel 15A and the left side panel 16A. Is spliced by. In the present embodiment, the right side panel 15A is located on the opposite side of the boom 5 and the swing body 3 with respect to the front panel 11, the rear panel 12, and the roof panel 13 (with respect to the internal space). The left side panel 16A is located on the same side as the boom 5 and the swing body 3 with respect to the front panel 11, the rear panel 12, and the roof panel 13 (with respect to the internal space).

  Here, the center plane X1 in the width direction of the cab 7A (the directions of the arrows W1 and W2) is defined. The front panel 11, the rear panel 12, and the roof panel 13 are formed in a symmetrical shape with respect to the width direction of the cab 7A with the center plane X1 as a symmetrical plane.

  In the present embodiment, the door 21 is attached to the right side panel 15A located on the side opposite to the boom 5 with respect to the internal space of the cab 7A. And a door is not attached to 16 A of left side panels located in the side by which the boom 5 is arrange | positioned with respect to the internal space of the cab 7A. Therefore, the cab 7A is a right door type cab. Further, the left side panel 16A is formed with a recess 22 whose outer surface is recessed toward the inside (in the present embodiment, the right side of the swivel body 3) in the width direction of the cab 7A. The concave portion 22 extends from the rear end of the left side panel 16A toward the front side, and extends from the lower end of the left side panel 16A toward the upper side. Note that the front end and the upper end of the left side panel 16 </ b> A are formed from portions other than the recess 22. By providing the recess 22, interference between the swing body 3 and the left side panel 16 </ b> A is prevented.

  Further, the left side panel 16 </ b> A is integrally formed from a press die including the recess 22. For this reason, in the formation of the left side panel 16A, there is no need to weld between the recess 22 and a portion other than the recess 22. Further, since the left side panel 16A is integrally formed, welding between the left side panel 16A and the rear panel 12 can be easily performed.

  FIG. 3 shows an enlarged view of the cab 7A viewed from the front side. As shown in FIGS. 2B, 3D, and 3A, the outer surface of the right side panel 15A has an inner side in the width direction of the cab 7A toward the upper side (in this embodiment, on the left side of the swing body 3). A curved right-side curved surface 25 </ b> A is formed that inclines toward (). Further, on the outer surface of the left side panel 16A, there is a curved left side curved surface 26A that is inclined inward in the width direction of the cab 7A toward the upper side (in the present embodiment, on the right side of the revolving structure 3). Is formed. The right side curved surface 25A and the left side curved surface 26A extend upward from the reference position Y1, and the lower ends of the right side curved surface 25A and the left side curved surface 26A are located at the reference position Y1. In each of the right side curved surface 25A and the left side curved surface 26A, the lower end located at the reference position Y1 is the outer end in the width direction of the cab 7A. When viewed from the front side (and the rear side), the right side curved surface 25A and the left side curved surface 26A are formed in an arc shape having the same radius of curvature R1 with respect to each other. Since the configuration is as described above, on the upper side from the reference position Y1, the right side curved surface 25A and the left side curved surface 26A are bilaterally symmetric with respect to the center plane X1 in the width direction of the cab 7A.

  Here, the height H0 from the lower end to the upper end of the cab 7A in the vertical direction (the directions of the arrows V1 and V2) is defined. Further, the vertical dimension H1 from the lower end of the cab 7A to the reference position Y1 (the lower ends of the side curved surfaces 25A and 26A) is defined in the vertical direction. The vertical dimension H1 is in the range from one quarter to one half of the height H0, and preferably about one third of the height H0. As a result, the reference position Y1 has substantially the same height as the elbow of the operator seated in the cab 7A, and an inner width that does not interfere with the movable range of the elbow in lever operation or the like is ensured. Since the height H0 and the vertical dimension H1 are defined as described above, the right side curved surface 25A extends over at least the upper half of the outer surface of the right side panel 15A, and the left side panel 16A On the outer surface, the left side curved surface 26A extends over at least the upper half range.

  A curved surface 27A extending from the reference position Y1 toward the lower side is extended on the outer surface of the right side panel 15A. The extended curved surface 27A has an upper end located at the reference position Y1, and is continuous with the lower end of the right side curved surface 25A at the reference position Y1. The extended curved surface 27A is formed in a curved shape that inclines inward in the width direction of the cab 7A (in this embodiment, on the left side of the revolving structure 3) as it goes downward. As viewed from the front side (and the rear side), the extended curved surface 27A is formed in an arc shape having the same radius of curvature R1 as the right side curved surface 25A. In the extended curved surface 27A, the upper end located at the reference position Y1 is the outer end in the width direction of the cab 7A. Since the right side curved surface 25A and the extended curved surface 27A are formed as described above, the outer end of the outer surface of the right side panel 15A in the width direction of the cab 7A is located at the reference position Y1.

  Further, an extended flat surface 28A extends from the reference position Y1 to the lower side on the outer surface of the left side panel 16A. The extended plane 28A has an upper end located at the reference position Y1, and is continuous with the lower end of the left side curved surface 26A at the reference position Y1. The extending plane 28A is formed in a planar shape substantially parallel to the vertical direction of the cab 7A. Since the left side curved surface 26A and the extension plane 28A are formed as described above, the extension plane 28A forms an outer end face in the width direction of the cab 7A on the outer surface of the left side panel 16A.

  4A shows the positional relationship between the cab 7 ′ and the boom 5 ′ in the width direction of the traveling vehicle body 2 ′ in the comparative example, and FIG. 4B shows the positional relationship between the traveling vehicle body 2 in the present embodiment. The positional relationship between the cab 7A and the boom 5 in the width direction is shown. The cab 7 ′ of the comparative example in FIG. 4A is a right door type cab. However, in the comparative example, the outer surface of the left side panel 16 ′ is a plane substantially parallel to the vertical direction at the upper portion of the cab 7 ′, whereas the outer surface of the right side panel 15 ′ is It is formed in a curved surface shape that is inclined inward as it goes upward. In the comparative example, the front panel 11 ′, the rear panel (12 ′), and the roof panel 13 ′ are asymmetrical in shape. In the comparative example, the outer surface of the left side panel 16 ′ has a planar shape that is substantially parallel to the vertical direction at the upper portion of the cab 7 ′. Therefore, the boom 5 ′ in the width direction of the traveling vehicle body (2 ′). The distance δ ′ from the attachment 8 ′ such as a cord / reel attached to the left side panel 16 ′ is reduced.

  On the other hand, in the present embodiment, the left side curved surface 26A is extended on the outer surface of the left side panel 16A at the upper portion of the cab 7A. The left side curved surface 26A is formed in a curved shape that inclines inward in the width direction of the cab 7A as it goes upward. Therefore, in the present embodiment, the separation distance δ from the attachment 8 such as a cord / reel attached to the boom 5 to the left side panel 16A in the width direction of the traveling vehicle body 2 is larger than the separation distance δ ′ in the comparative example. And get bigger. Even if the cab 7A vibrates in the width direction of the traveling vehicle body 2 by increasing the separation distance δ from the boom 5 (attachment 8) of the left side panel 16A, the cab 7A with the attachment 8 to the boom 5 is vibrated. Interference is effectively prevented.

  On the upper side from the reference position Y1, the right side curved surface 25A and the left side curved surface 26A are symmetrical with respect to each other with the center plane X1 in the width direction of the cab 7A as a symmetry plane. For this reason, even if the front panel 11, the rear panel 12, and the roof panel 13 have a symmetrical shape, the right side panel 15A and the left side panel 16A are easily joined.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, the configuration of the first embodiment is modified as follows. In addition, the same code | symbol is attached | subjected about the part same as 1st Embodiment, and the description is abbreviate | omitted.

  In the present embodiment, a left door type cab 7B is used instead of the right door type cab 7A of the first embodiment. For this reason, in the crane 1 of this embodiment, the cab 7 </ b> B is installed on the left side of the traveling vehicle body 2 with respect to the swing body 3 and the boom 5.

  FIG. 5 is a diagram showing the configuration of the cab 7B. 5, (a) is a view seen from the upper side (arrow V1 side), (b) is a view seen from the right side (arrow W1 side), and (c) is seen from the front side (arrow P1 side). (D) is the figure seen from the left side (arrow W2 side), (e) is the figure seen from the back side (arrow P2 side). As shown in FIGS. 5A to 5E, the cab 7B is formed by forming the front panel 11, the rear panel 12, the roof panel 13, the right side panel 15B, and the left side panel 16B with a press die, and assembling them. Is formed. In the cab 7B of this embodiment, the front panel 11, the rear panel 12, and the roof panel 13 are the same as those used in the cab 7A of the first embodiment, and are shared with the cab 7A of the first embodiment. The For this reason, the front panel 11, the rear panel 12, and the roof panel 13 are formed in a bilaterally symmetric shape with the center plane X2 in the width direction of the cab 7B (the direction of the arrow W1 and the arrow W2) as a symmetry plane.

  In the present embodiment, the right side panel 15B is located on the same side as the boom 5 and the swing body 3 with respect to the front panel 11, the rear panel 12, and the roof panel 13 (with respect to the internal space). The left side panel 16B is located on the opposite side of the boom 5 and the revolving structure 3 with respect to the front panel 11, the rear panel 12, and the roof panel 13 (with respect to the internal space). Moreover, in this embodiment, the door 21 is attached to the left side panel 16B located on the opposite side to the boom 5 with respect to the internal space of the cab 7B, and the boom 5 is disposed with respect to the internal space of the cab 7B. A door is not attached to the right side panel 15B located on the side. Further, the right side panel 15B is formed with a recess 22 whose outer surface is recessed toward the inside in the width direction of the cab 7B (in this embodiment, on the left side of the swing body 3). Interference with the right side panel 15B is prevented.

  Also in this embodiment, the right side curved surface 25B extends from the reference position Y2 upward on the outer surface of the right side panel 15B, and the reference surface Y2 extends upward from the outer surface of the left side panel 16B. A left side curved surface 26B is extended toward the front. The right side curved surface 25B is formed in a curved shape that inclines inward in the width direction of the cab 7B toward the upper side (in this embodiment, the left side of the revolving structure 3), and the left side curved surface 26B is formed on the upper side. It is formed in the curved surface shape which inclines toward the inner side (this embodiment right side of the turning body 3) about the width direction of the cab 7B as it goes to. In each of the right side curved surface 25B and the left side curved surface 26B, the reference position Y2 is the lower end and the outer end in the width direction of the cab 7B. When viewed from the front side (and the rear side), the right side curved surface 25B and the left side curved surface 26B are formed in an arc shape having the same curvature radius R2 with respect to each other. Since the configuration is as described above, on the upper side from the reference position Y2, the right side curved surface 25B and the left side curved surface 26B are bilaterally symmetric with respect to the center plane X2 in the width direction of the cab 7B.

  Also in the present embodiment, the reference position Y2 is located in the range of ¼ to ½ with respect to the height of the cab 7B in the vertical direction. For this reason, the right side curved surface 25B extends over at least the upper half of the outer surface of the right side panel 15B, and at least over the upper half of the outer surface of the left side panel 16B. The left side curved surface 26B is extended.

  In the present embodiment, an extended flat surface 27B extends from the reference position Y2 toward the lower side on the outer surface of the right side panel 15B. The extended plane 27B has an upper end located at the reference position Y2, and is continuous with the lower end of the right side curved surface 25B at the reference position Y2. The extending plane 27B is formed in a plane shape substantially parallel to the vertical direction of the cab 7B. Since the right side curved surface 25B and the extension plane 27B are formed as described above, the extension plane 27B forms an outer end face in the width direction of the cab 7B on the outer surface of the right side panel 15B.

  A curved surface 28B extending from the reference position Y2 to the lower side is extended on the outer surface of the left side panel 16B. The extended curved surface 28B has an upper end located at the reference position Y2, and is continuous with the lower end of the left side curved surface 26B at the reference position Y2. The extended curved surface 28B is formed in a curved shape that inclines inward in the width direction of the cab 7B toward the lower side (in the present embodiment, on the right side of the traveling vehicle body 2). When viewed from the front side (and the rear side), the extended curved surface 28B is formed in an arc shape having the same radius of curvature R2 as the left side curved surface 26B. In the extended curved surface 28B, the upper end located at the reference position Y2 is the outer end in the width direction of the cab 7B. Since the left side curved surface 26B and the extended curved surface 28B are formed as described above, the outer end of the outer surface of the left side panel 16B in the width direction of the cab 7B is located at the reference position Y2.

  As described above, in the present embodiment, in the upper portion of the cab 7B, the right side curved surface 25B extends on the outer surface of the right side panel 15B, and the right side curved surface 25B increases in width toward the upper side. It is formed in a curved surface shape that is inclined inward in the direction. For this reason, in this embodiment, the separation distance from the attachment 8 such as a cord / reel attached to the boom 5 to the right side panel 15B in the width direction of the traveling vehicle body 2 increases. Thereby, even if the cab 7B vibrates in the width direction of the traveling vehicle body 2, the interference of the cab 7B with the attachment 8 on the boom 5 is effectively prevented.

  Also in the present embodiment, on the upper side from the reference position Y2, the right side curved surface 25B and the left side curved surface 26B are symmetric with respect to each other with the center plane X2 in the width direction of the cab 7B as a symmetry plane. For this reason, even if the front panel 11, the rear panel 12, and the roof panel 13 have a symmetrical shape, the right side panel 15B and the left side panel 16B are easily joined.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIGS. 6 and 7A to 7E. In the third embodiment, the configuration of the first embodiment is modified as follows. In addition, the same code | symbol is attached | subjected about the part same as 1st Embodiment, and the description is abbreviate | omitted.

  In the present embodiment, a double door type cab 7C is used instead of the right door type cab 7A of the first embodiment. FIG. 6 shows an example of the crane 1 in which the double door type cab 7C is used. In the crane 1 shown in FIG. 6, the cab 7C is movable with respect to the traveling vehicle body 2 between a position A1 and a position A2. When traveling with the crane 1 traveling, the cab 7C is positioned at the position A1. On the other hand, the cab 7C is located at the position A2 when the boom 5 is raised and lowered. By driving the swing-out mechanism 30, the cab 7C moves between the position A1 and the position A2.

  At the traveling position A1, the cab 7C is located on the rear side of the traveling vehicle body 2 (the arrow P′2 side in FIG. 6) with respect to the revolving structure 3 and the boom 5. At this time, the front side (arrow P1 side in FIG. 6) of the cab 7C coincides with the left side (arrow W′2 side in FIG. 6) of the traveling vehicle body 2, and the rear side (arrow P2 in FIG. 6) of the cab 7C. Side) coincides with the right side of the traveling vehicle body 2 (the arrow W′1 side in FIG. 6). The right side of the cab 7C (arrow W1 side in FIG. 6) coincides with the front side of the traveling vehicle body 2 (arrow P′1 side in FIG. 6), and the left side of the cab 7C (arrow W2 in FIG. 6). Side) coincides with the rear side of the traveling vehicle body. Further, the cab 7C is located on the right side of the traveling vehicle body 2 with respect to the revolving structure 3 and the boom 5 at the position A2 at the time of work. At this time, the front side of the cab 7C coincides with the front side of the traveling vehicle body 2, and the rear side of the cab 7C coincides with the rear side of the traveling vehicle body 2. The right side of the cab 7C coincides with the right side of the traveling vehicle body 2, and the left side of the cab 7C coincides with the left side of the traveling vehicle body.

  Further, the cab 7C may move with respect to the traveling vehicle body (2) in the same manner as in Reference Document 1 (Japanese Patent Laid-Open No. 2012-197177). In this case, it is located on the left side of the traveling vehicle body (2) with respect to the revolving body (3) and the boom (5) in both the traveling position and the working position. However, in the traveling position, the cab (7C) is located on the rear side of the traveling vehicle body (2) as compared to the working position. In this case, in the traveling position, the front side of the cab (7C) coincides with the rear side of the traveling vehicle body (2), and the rear side of the cab (7C) coincides with the front side of the traveling vehicle body (2). In the traveling position, the right side of the cab (7C) coincides with the left side of the traveling vehicle body (2), and the left side of the cab (7C) coincides with the right side of the traveling vehicle body (2). On the other hand, at the working position, the front side of the cab (7C) coincides with the front side of the traveling vehicle body (2), and the rear side of the cab (7C) coincides with the rear side of the traveling vehicle body (2). In the working position, the right side of the cab (7C) coincides with the right side of the traveling vehicle body (2), and the left side of the cab (7C) coincides with the left side of the traveling vehicle body (2).

  FIG. 7 is a diagram showing a configuration of the cab 7C. 7, (a) is a view seen from the upper side (arrow V1 side), (b) is a view seen from the rear side (arrow P2 side), and (c) is seen from the right side (arrow W1 side). (D) is the figure seen from the front side (arrow P1 side), (e) is the figure seen from the left side (arrow W2 side). As shown in FIGS. 7A to 7E, the cab 7C is formed by forming each of the front panel 11, the rear panel 12, the roof panel 13, the right side panel 15C, and the left side panel 16C with a press die, and assembling them. Is formed. In the cab 7C of this embodiment, the front panel 11, the rear panel 12, and the roof panel 13 are the same as those used in the cab 7A of the first embodiment and the cab 7B of the second embodiment. It is shared with the cab 7A of the embodiment and the cab 7B of the second embodiment. For this reason, the front panel 11, the rear panel 12, and the roof panel 13 are formed in a bilaterally symmetric shape with the center plane X3 in the width direction of the cab 7B (the directions of the arrows W1 and W2) as the symmetry plane.

  In the present embodiment, the door 21a is attached to the right side panel 15C, and the door 21b is attached to the left side panel 16C. That is, a door (21a; 21b) is provided on each of the side panels 15C and 16C.

  Also in this embodiment, the right side curved surface 25C extends upward from the reference position Y3 on the outer surface of the right side panel 15C, and the upper surface of the left side panel 16C extends upward from the reference position Y3. A left side curved surface 26C is extended toward the front. The right side curved surface 25C is formed in a curved shape that inclines inward in the width direction of the cab 7C toward the upper side (the left side of the traveling vehicle body 2 at the working position A2), and the left side curved surface 26C is As it goes upward, it is formed in a curved shape that inclines inward in the width direction of the cab 7C (to the right side of the traveling vehicle body 2 at the position A2 during operation). In each of the right side curved surface 25C and the left side curved surface 26C, the reference position Y3 is the lower end and the outer end in the width direction of the cab 7C. When viewed from the front side (and the rear side) of the cab 7C, the right side curved surface 25C and the left side curved surface 26C are formed in an arc shape having the same curvature radius R3 with respect to each other. Since the configuration is as described above, on the upper side from the reference position Y3, the right side curved surface 25C and the left side curved surface 26C are bilaterally symmetric with respect to the center plane X3 in the width direction of the cab 7C.

  Also in the present embodiment, the reference position Y3 is located in a range from ¼ to ½ with respect to the height of the cab 7C in the vertical direction. For this reason, the right side curved surface 25C extends over at least the upper half of the outer surface of the right side panel 15C, and at least the upper half of the outer surface of the left side panel 16C. The left side curved surface 26C is extended.

  In the present embodiment, a right extending curved surface 27C extends downward from the reference position Y3 on the outer surface of the right side panel 15C, and extends downward from the reference position Y3 on the outer surface of the left side panel 16C. The left extended curved surface 28C is extended. The right extending curved surface 27C has an upper end located at the reference position Y3 and is continuous with the lower end of the right side curved surface 25C at the reference position Y3. The left extended curved surface 28C has an upper end located at the reference position Y3 and is continuous with the lower end of the left side curved surface 26C at the reference position Y3. Each of the extended curved surfaces 27C and 28C is formed in a curved surface shape that inclines inward in the width direction of the cab 7C as it goes downward. As viewed from the front side (and the rear side) of the cab 7C, each of the extended curved surfaces 27C and 28C is formed in an arc shape having the same radius of curvature R3 as the side curved surfaces 25C and 26C. In the right extended curved surface 27C, the upper end located at the reference position Y3 is the outer end in the width direction of the cab 7C, and in the left extended curved surface 28C, the upper end located in the reference position Y3 is the width direction of the cab 7C. Will be the outer edge about. Since the right side curved surface 25C and the right extending curved surface 27C are formed as described above, the outer end of the outer surface of the right side panel 15C in the width direction of the cab 7C is located at the reference position Y3. Since the left side curved surface 26C and the left extended curved surface 28C are formed as described above, the outer end of the outer surface of the left side panel 16C in the width direction of the cab 7C is located at the reference position Y3.

  As described above, in the present embodiment, in the upper portion of the cab 7C, the left side curved surface 26C extends on the outer surface of the left side panel 16C, and the left side curved surface 26C increases in width toward the upper side. It is formed in a curved surface shape that is inclined inward in the direction. For this reason, in the present embodiment, the distance from the attachment 8 such as a cord / reel attached to the boom 5 to the left side panel 16C in the width direction of the traveling vehicle body 2 in the width direction of the traveling vehicle body 2 increases at the working position A2. Thereby, even if the cab 7B vibrates in the width direction of the traveling vehicle body 2, the interference of the cab 7C with the attachment 8 on the boom 5 is effectively prevented.

  Also in the present embodiment, on the upper side from the reference position Y3, the right side curved surface 25C and the left side curved surface 26C are symmetric with respect to each other with the center plane X3 in the width direction of the cab 7C as a symmetry plane. For this reason, even if the front panel 11, the rear panel 12, and the roof panel 13 are symmetrical, the right side panel 15C and the left side panel 16C are easily joined.

(Common matters in the above-mentioned embodiment)
In the above-described embodiment, the front panel 11, the rear panel 12, and the roof panel 13 are formed in a bilaterally symmetric shape with the center plane X1 in the width direction of the cab 7A (the directions of the arrows W1 and W2) as a symmetry plane. . Therefore, in the right door cab 7A of the first embodiment, the left door cab 7B of the second embodiment, and the double door cab 7C of the third embodiment, the front panel 11 and the rear panel 12 and the roof panel 13 are shared. For this reason, even if the kind of cab (7A-7C) differs, each of the front panel 11, the rear panel 12, and the roof panel 13 is formed using the same press die. Thereby, the cost and effort in manufacture of a cab (7A-7C) are reduced.

  In the above-described embodiment, the cab (7A; 7B; 7C) of the construction machine (1) has the right side panel (15A; 15B; 15C) with the outer surface facing the right side (W1) and the outer surface on the left side. Left side panel (16A; 16B; 16C) facing the side (W2), front panel (11) whose outer surface faces the front side (P1), and roof panel (13) whose outer surface faces the upper side (V1) ) And a rear panel (12) whose outer surface faces the rear side (P2). The front panel (11), the roof panel (13), and the rear panel (12) are symmetrical between the right side panel (15A; 15B; 15C) and the left side panel (16A; 16B; 16C). It is formed into a shape.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and the like, and it goes without saying that various modifications can be made without departing from the spirit of the invention.

  DESCRIPTION OF SYMBOLS 1 ... Crane, 7A-7C ... Cab, 11 ... Front panel, 12 ... Rear panel, 13 ... Roof panel, 15A-15C ... Right side panel, 16A-16C ... Left side panel

Claims (1)

A right side panel whose outer surface faces the right side;
A left side panel whose outer surface faces the left side,
A front panel formed in a bilaterally symmetric shape with an outer surface facing the front side, and joining between the right side panel and the left side panel;
A roof panel formed in a bilaterally symmetric shape with the outer surface facing upward and joining the right side panel and the left side panel;
A rear panel that is formed in a bilaterally symmetric shape, with the outer surface facing the rear side, joining the right side panel and the left side panel,
Comprising
The right side panel extends over at least the upper half of the outer surface of the right side panel and is formed in a curved shape that inclines inwardly toward the upper side. With a curved surface,
The left side panel extends over at least the upper half of the outer surface of the left side panel, and has the same radius of curvature as the right side curved surface toward the upper side toward the upper side. It has a left side curved surface that is formed into an inclined curved surface,
The first side panel that is one of the right side panel and the left side panel includes a door,
The second side panel, which is one of the right side panel and the left side panel, which is different from the first side panel, is not provided with a door,
The second side panel includes a concave portion whose outer surface is recessed inward in the left-right direction,
In the outer surface of the second side panel, the recess extends from the rear end toward the front side, and extends from the lower end toward the upper side.
In the second side panel, the right side curved surface or the left side curved surface is formed in a portion other than the concave portion,
In the second side panel, a welded portion is not formed between a portion other than the recess and the recess, and the recess and the portion other than the recess are integrated.
Construction machinery cab.