JP7181076B2 - CABIN STRUCTURE FOR CONSTRUCTION MACHINE AND METHOD FOR MANUFACTURING THE SAME - Google Patents

Description

The present invention relates to a construction machine cabin structure and a manufacturing method thereof, and more particularly to a construction machine cabin structure and a manufacturing method thereof that can improve the ease of assembly of interior components such as instrument panels, seats, and air conditioners.

As shown in FIGS. 1(a) and 1(b), in a cabin structure 1 of a construction machine (hydraulic excavator, wheel loader, bulldozer, dump truck, articulated dump truck, etc.), the right and left sides of the cab in the vehicle width direction There are many types in which the door 2 is provided only on one side. Therefore, as shown in FIG. 2(a), on the side of the cab frame body 3J where the door 2 is provided (on the left side in the traveling direction in FIG. 2(a)), there is a door between the front pillar 4L and the rear pillar 5L. A center pillar 6 is provided for the vehicle, and the center pillar 6 is not provided on the side opposite to the door of the cab frame main body 3J.

Conventionally, when manufacturing a cabin structure for construction machinery, as shown in FIG.・After welding the side panel 7J as a structural member for rigidity and electro-depositing the cab frame body 3J to which the side panel 7J is welded, from between the door side front pillar 4L and the center pillar 6, arrow X As shown, interior parts such as an instrument panel, a seat, an air conditioner, etc. are brought into the cab frame main body 3J and assembled.

Japanese Patent Application Laid-Open No. 2006-36002

However, as indicated by an arrow X in FIG. 2(a), the center pillar 6 for the door and the front pillar 4L serve as an opening for carrying interior parts such as an instrument panel into the cab frame main body 3J. The interval was narrow compared to the size of the interior parts, and it could not be said that the portability was good. In addition, the distance between the center pillar 6 and the front pillar 4L, which serves as an opening for loading, is not wide enough to allow the use of material handling equipment (cargo handling equipment, hereinafter referred to as material handling equipment). The interior parts had to be lifted and brought in by several workers, and workability was not good.

Patent Document 1 discloses a construction machine cab structure in which a construction machine cab is divided into a front structure and a main structure, and the front structure and the main structure are fastened with bolts. ing. However, in the main structure of Document 1, center pillars are arranged between the front pillar and the rear pillar on both the left and right sides in the vehicle width direction. Therefore, the construction machine cab structure of Document 1 utilizes the absence of either the left or right center pillar to increase the area of the opening through which interior parts such as instrument panels, seats, and air conditioners are carried into the cab. are different in technical premise.

SUMMARY OF THE INVENTION An object of the present invention, which was devised in consideration of the above circumstances, is to provide a cabin structure for construction machinery and a method of manufacturing the same, which can improve the ease of assembly of interior parts such as instrument panels, seats, and air conditioners.

According to the cabin structure of the construction machine according to the present invention, which has been devised to achieve the above object, the front pillars are erected on the left and right of the front portion of the floor panel, and the rear pillars are erected on the left and right of the rear portion of the floor panel. , A center pillar for the door is arranged between the front pillar and the rear pillar on one of the left and right, and a large opening is formed without a center pillar between the front pillar and the rear pillar on the other left and right. Interior parts such as instrument panels, seats, air conditioners, etc., which are brought into the cab frame body through a large opening between the main body of the cab frame and the front and rear pillars on the opposite side of the door of the painted cab frame body, It has a painted side panel attached to a large opening between the front pillar and rear pillar on the side opposite the door of the painted cab frame body, and the painted side panel is painted with bolts, rivets or adhesive. Provided is a cabin structure for construction machinery, characterized in that it is installed in a large opening of a pre-installed cab frame body.

Further, according to the manufacturing method of the cabin structure of the construction machine according to the present invention, the front pillars are erected on the left and right of the front part of the floor panel, and the rear pillars are erected on the left and right of the rear part of the floor panel. A center pillar for the door is arranged between the front and rear pillars of the left and right, and a large opening is formed without a center pillar between the front and rear pillars on the left and right. Through the large opening between the front and rear pillars on the opposite side of the door of the pre-painted cab frame, the instrument panel, seats, air conditioner, and other interior parts were brought into the cab frame and assembled. A cabin structure for a construction machine, characterized in that a painted side panel is attached to a large opening of a painted cab frame main body, to which interior parts are assembled, by means of bolts, rivets or adhesives. is provided.

Further, according to the manufacturing method of the cabin structure of the construction machine according to the present invention, the front pillars are erected on the left and right of the front part of the floor panel, and the rear pillars are erected on the left and right of the rear part of the floor panel. A cab frame body is manufactured in which a center pillar for a door is arranged between the front pillar and the rear pillar of the left and right, and a large opening is formed without a center pillar between the front pillar and the rear pillar of the other left and right. When the cab frame body is submerged in an aqueous paint solution for electrodeposition coating or a cleaning solution and lifted up, the body of the cab frame is tilted so that the large opening faces downward, and the sediment accumulates on the floor panel of the lifted cab frame. Aqueous paint solution or cleaning liquid is dripped from a large opening, and interior parts such as the instrument panel, seats, air conditioners, etc. After carrying it inside and assembling it, the painted side panel is attached to the large opening of the painted cab frame main body with the interior parts installed by bolts, rivets or adhesives. A method for manufacturing a cabin structure for a construction machine is provided.

ADVANTAGE OF THE INVENTION According to this invention, the following effects can be exhibited.
(1) Before attaching the painted side panel to the large opening between the front pillar and rear pillar on the side opposite the door of the painted cab frame body with bolts, rivets or adhesives, assemble it into the cab frame body. Interior parts such as instrument panels, seats, and air conditioners can be carried into the main body of the cab frame through the large opening.
(2) The gap between the front pillar and the rear pillar, which serves as the opening for carrying in interior parts such as the instrument panel, is wider than the gap between the front pillar and the center pillar, which used to be the opening for carrying in interior parts, so so-called material handling equipment is required. Since the interior parts such as the instrument panel can be carried into the cab frame by pressing, the workability is improved and the work time can be shortened when the interior parts such as the instrument panel having a certain weight are carried into the cab frame body.
(3) After assembling the interior parts such as the instrument panel, seats, air conditioner, etc. so as to be properly assembled on the outside of the cab frame main body to make a sub-assembly part large enough to pass through the large opening, the sub-assembly part is processed by so-called material handling equipment. Since it can be carried into the cab frame main body through the large opening by using it, workability is improved.
(4) Enlarging the painted cab frame body The painted side panels are attached to the openings by bolts, rivets, or adhesives instead of welding, so that the cab frame body and the cab frame body do not differ in the cabin structure after installation. The painted surfaces at the joints with the side panels are not damaged by welding heat, and both the quality and the ease of assembly of the completed cabin structure can be achieved.
(5) When electrodeposition coating is applied to the main body of the cab frame before installing the side panels, tilt the cab frame so that the side where there is no center pillar between the front pillar and the rear pillar and where the large opening is formed faces downward. By submerging the cab frame in the paint aqueous solution or cleaning liquid for electrodeposition coating and pulling it up, the paint aqueous solution or cleaning liquid accumulated in the floor panel of the lifted cab frame can be easily drained from the large opening. Therefore, the time for running out of liquid can be shortened, and the so-called tact time can be shortened. In addition, in each step of electrodeposition coating, the amount of liquid carried from the previous tank to the current tank and from the current tank to the next tank can be reduced, improving the quality of the coating.

It is an external view of the cabin structure of a construction machine, (a) is a perspective view of a cabin structure, (b) is the perspective view which looked at the cabin structure from the opposite direction. (a) is an explanatory view showing a conventional construction machine cabin structure and its manufacturing method, and (b) is an explanatory view showing a construction machine cabin structure and its manufacturing method according to an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram showing a cabin structure of a construction machine and a method of manufacturing the same according to one embodiment of the present invention; It is another explanatory drawing which shows the cabin structure of the construction machine which concerns on one Embodiment of this invention, and its manufacturing method. FIG. 2 is an explanatory drawing showing how the cab frame body of the cabin structure of the construction machine according to the embodiment of the present invention is painted, in which (a) shows how the cab frame body is submerged in an aqueous coating solution or washing liquid for electrodeposition coating; (b) is an explanatory view showing a state in which the cab frame main body is pulled up from an aqueous paint solution for electrodeposition coating or a cleaning liquid. FIG. 4 is an explanatory view showing a step of electrodeposition coating the cab frame main body of the cabin structure of the construction machine according to the embodiment of the present invention;

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are given the same reference numerals to omit redundant description, and elements that are not directly related to the present invention are omitted from the drawings. do.

(cabin structure of construction machinery)
As shown in FIG. 3, in the construction machine cabin structure 1 according to the embodiment of the present invention, front pillars 4L and 4R are erected on the left and right of the front portion of the floor panel 8, and left and right of the rear portion of the floor panel 8. Rear pillars 5L and 5R are erected on the left and right sides, and a center pillar 6 for doors is disposed between the front pillar 4L and the rear pillar 5L on either the left or right side (on the left side in the direction of travel in FIG. 3). Right side) a painted cab frame main body 3 in which there is no center pillar and a large opening 9 is formed between the front pillar 4R and the rear pillar 5R, and the front pillar of the painted cab frame main body 3 on the side opposite to the door. A painted side panel 7 is attached to a large opening 9 between 4R and a rear pillar 5R, and the painted side panel 7 is attached to the painted cab frame main body 3 by bolts, rivets or adhesive. is installed in the large opening of Each component will be described below.

(Cab frame body 3)
As shown in FIGS. 2(b) and 3, the cab frame body 3 includes a floor panel 8 having floor rails 8b attached to the four sides of a rectangular plate 8a, and left and right sides of the front portion of the floor panel 8. rear pillars 5L, 5R erected on the left and right at the rear of the floor panel 8; roof rails 10L, 10R connecting the front pillars 4L, 4R and the rear pillars 5L, 5R; and left and right roof rails. A ceiling plate 11 attached between 10L and 10R, a front panel 12 attached to the lower portion between the left and right front pillars 4L and 4R, and a rear panel 13 attached to the lower portion between the left and right rear pillars 5L and 5R. and

Also, the cab frame body 3 is provided with a center pillar for a door standing on the floor panel 8 and positioned between the front pillar 4L and the rear pillar 5L on either the left or right side (the left side in the direction of travel in FIG. 3). 6 and a large opening 9 defined by a front pillar 4R, a rear pillar 5R, a roof rail 10R, and a floor rail 8b on the other side (opposite to the door), between the door-side center pillar 6 and the rear pillar 5L. , a rear side panel 14 is attached. The cab frame main body 3 is constructed by welding components such as a floor panel 8, front pillars 4L and 4R, and rear pillars 5L and 5R, and is in a state of being coated by electrodeposition coating described later.

The cab frame main body 3 has the required strength and rigidity (for example, ROPS standard, FOPS standard) are secured. ROPS (Roll Over Protective Structure) is a standard for a fall over driver protection structure defined by the International Organization for Standardization (ISO) regarding the cabin structure of construction machinery, and FOPS (Falling Object Protective Structure) is also ISO It is a standard for a falling object protection structure stipulated in .

In order to satisfy these standards (ROPS, FOPS, etc.), as shown in FIGS. , the connecting portions between the left and right floor rails 8b and the front pillars 4R and 4L, and the connecting portions between the left and right rear pillars 5R and 5L and the roof rails, respectively, are provided with triangular reinforcing gussets 16 to form a large opening 9. Necessary strength and rigidity are ensured in a state where the side panel 7 is not attached.

(Side panel 7)
As shown in FIG. 3, a painted side panel 7 is attached to the lower portion of the large opening 9 of the painted cab frame body 3 with bolts, rivets, or an adhesive. The side panel 7 has its lower edge attached to the floor rail 8b of the floor panel 8, its front edge attached to the lower portion of the front pillar 4R of the cab frame body 3, and its rear edge attached to the lower portion of the rear pillar 5R with bolts and rivets, respectively. Or fixed by glue. Here, although the cab frame body 3 has already been painted and the side panels 7 have already been painted, they are joined by bolts, rivets, or adhesives instead of welding, so the cab frame body 3 and the side panels are not welded. The coated surface at the joining portion with the panel 7 is not damaged by welding heat. The side panel 7 is coated by electrodeposition coating or the like.

Further, as indicated by broken lines in FIG. 3, a control box 26, a relay box 27, etc. containing controllers, relays, etc. used for working and operating the construction machine are provided on the inner surface of the side panel 7 (the surface on the driver's cab side). , may be pre-installed. By using subassemblies in this way, the process of attaching the control box 26 and the like to the side panel 7 from the driver's compartment in the post-process becomes unnecessary, and the assembly time can be shortened. Further, since the control box 26 and the like attached to the inner surface of the side panel 7 are hollow bodies, they also function as soundproof boxes when noise from outside the cab enters the cab. Here, the driver's seat 19b is arranged to be biased toward the side panel 7 by the auxiliary seat, and the control box 26 and the like arranged adjacent to the driver's seat 19a function as a soundproof box. Thus, the noise to the driver seated on the seat 19a can be attenuated appropriately.

Further, as shown in FIG. 3, a side window 18 having a window frame 17 is attached with an adhesive to the upper portion of the large opening 9 of the painted cab frame body 3 (the portion not blocked by the side panel 7). ing. The side window 18 has an upper edge portion of the window frame 17 attached to the roof rail 10R of the cab frame body 3, a front edge portion of the window frame 17 attached to the upper portion of the front pillar 4R of the cab frame body 3, and a rear edge portion of the window frame 17. is fixed to the upper part of the rear pillar 5R of the cab frame body 3, and the lower edge of the window frame 17 is fixed to the upper edge of the side panel 7 by adhesive, respectively, and is attached to the upper part of the large opening 9. . The side window 18 may be fixed to the cab frame main body 3 or the side panel 7 with bolts or rivets.

The construction machine cabin structure 1 described above is manufactured as follows.

(Manufacturing method of cabin structure 1 for construction machinery)
In the manufacturing method of the cabin structure 1 for construction machinery according to one embodiment of the present invention, as shown in FIG. Interior parts 19 such as an instrument panel 19a, a seat (suspension seat, etc.) 19b, an air conditioner 19c, etc. 4, the painted side panel 7 is attached to the large opening of the painted cab frame main body 3 to which the interior parts 19 are assembled by bolts, rivets or It is attached with an adhesive.

As shown in FIG. 3, the painted cab frame main body 3 has front pillars 4L and 4R on the left and right of the front portion of the floor panel 8, and rear pillars 5L and 5R on the left and right of the rear portion of the floor panel 8. A center pillar 6 for a door is arranged between the front pillar 4L and the rear pillar 5L on one of the left and right sides, and a large opening is formed without a center pillar between the front pillar 4R and the rear pillar 5R on the other left or right side. 9 are formed and configured. The manufacturing method of the cabin structure 1 for construction machinery according to the present invention uses the fact that the center pillar 6 is not present on either the left or right side of the cab frame body 3, and the interior parts 19 such as the instrument panel 19a, the seat 19b, and the air conditioner 19c are manufactured. is intended to expand the area of the opening through which the is carried into the cab frame main body 3.

As shown in FIG. 4, the interior components 19 such as an instrument panel 19a, a seat 19b, an air conditioner 19c, etc., which are assembled in the cab frame body 3, are assembled into a large opening 9 as shown in FIG. It is not limited to the method of carrying it into the cab frame main body 3 through the opening 9, but the interior component 19 may be carried in individually for each component, and the interior component 19 is a sub-assembly product of a size that can pass through the large opening 9. , and the sub-assemblies may be carried in. The components, sub-assemblies, and assemblies of the interior fittings 19 to be brought in are held by so-called material handling equipment outside the cab frame main body 3, carried into the cab frame main body 3 through the large opening 9, and assembled.

(Electrodeposition coating)
FIGS. 5(a) and 5(b) show how the cab frame main body 3 is electrodeposited. The cab frame main body 3 without the side panel 7 and the door 2 shown in FIG. When the cab frame main body 3 is tilted so that the large opening 9 faces downward, the aqueous paint solution accumulated on the floor panel 8 of the lifted cab frame 3 is submerged in the paint aqueous solution for coating or the cleaning liquid 20 and pulled up. Alternatively, the cleaning liquid 20 is dropped from the large opening 9 .

That is, as shown in FIG. 2(b), front pillars 4R and 4L are erected on the left and right of the front portion of the floor panel 8, and rear pillars 5R and 5L are erected on the left and right of the rear portion of the floor panel 8. A center pillar 6 for a door is arranged between one of the front pillars 4L and the rear pillars 5L, and a large opening 9 is formed without a center pillar between the left and right other front pillars 4R and rear pillars 5R. A cab frame main body 3 is manufactured, and this cab frame main body 3 is suspended from a mobile carriage 21 for electrodeposition coating through a plurality of suspension wires 22, and the length of each suspension wire 22 is adjusted to The posture of the cab frame main body 3 is inclined so that the large opening 9 faces downward.

As shown in FIG. 6, the carriage 21 is composed of a moving portion 21a that moves along the rails 23, and an elevating portion 21b that moves up and down from the moving portion 21a via an elevating wire 24. A cab frame body 3 is suspended via suspension wires 22 . The rails 23 are arranged above a plurality of storage tanks 25 arranged side by side for electrodeposition coating. Each storage tank 25 stores a degreasing solution, washing water, a surface conditioning liquid, a chemical conversion treatment liquid, an aqueous paint solution for electrodeposition coating, and the like. In FIG. 6, the cab frame main body 3 is not shown to be tilted for convenience of drawing, but in reality it is tilted as shown in FIGS. 5(a) and 5(b). It has become.

In this way, the cab frame main body 3 is pulled up from the paint aqueous solution or the cleaning liquid 20 in an inclined posture with the large opening 9 downward, so that each storage tank 25 in the electrodeposition coating process shown in FIG. The paint aqueous solution or cleaning liquid 20 accumulated on the floor panel 8 of the frame body 3 is dropped from the large opening 9 (see FIGS. 5(a) and 5(b)). After that, the electrodeposition coating of the cab frame main body 3 is completed through a baking process and a drying process (not shown).

After completion of electrodeposition coating, as shown in FIG. Interior parts such as an instrument panel 19a, a seat 19b, an air conditioner 19c, etc. are brought into the cab frame main body 3 through the large opening 9 between the rear pillar 5R and the rear pillar 5R, and assembled. Thereafter, as shown in FIG. 4, the painted side panel 7 is attached to the large opening 9 of the painted cab frame body 3 to which the interior parts 19 are assembled by bolts, rivets or adhesives instead of welding. do.

(action/effect)
According to this embodiment, the following functions and effects can be exhibited.

As shown in FIGS. 3 and 4, the painted side panel 7 is attached to the large opening 9 between the front pillar 4R and the rear pillar 5R on the opposite side of the door of the painted cab frame body 3 with bolts, rivets or adhesives. The interior parts 19 such as an instrument panel 19a, a seat 19b, an air conditioner 19c, etc. to be assembled in the cab frame main body 3 can be carried into the cab frame main body 3 through the large-sized opening 9 before being mounted. Therefore, the interior parts 19 such as the instrument panel 19a can be transported more easily, and the transport time can be shortened.

As shown in FIG. 2(b), the distance between the front pillar 4R and the rear pillar 5R, which serve as an opening for carrying in the interior parts 19 such as the instrument panel 19a, is larger than that of the conventional carrying-in opening, as shown in FIG. 2(a). Since the distance between the front pillar 4L and the center pillar 6 is wider than the gap between the front pillar 4L and the center pillar 6, when carrying the interior parts 19 such as the instrument panel 19a into the cab frame 3 as indicated by the arrow Y in FIG. It can be carried in using so-called material handling equipment without relying on it. Therefore, workability is improved when the interior parts 19 such as the instrument panel 19a having a certain weight are carried into the cab frame main body 3, and the work time can be shortened.

As shown in FIG. 3, after assembling the interior parts 19 such as the instrument panel 19a, the seat 19b, the air conditioner 19c, etc., so as to be put together appropriately outside the cab frame body 3, and forming a sub-assembly product of a size that can pass through the large opening 9. Since the subassembly can be carried into the cab frame main body 3 through the large opening 9 by using so-called material handling equipment, the workability can be improved and the assembly time can be shortened.

As shown in FIG. 4, the painted side panel 7 is attached to the enlarged opening 9 of the painted cab frame main body 3 by bolts, rivets, or adhesive instead of welding, so the cabin after attachment In the structure 1, the coating surface at the joint portion between the cab frame body 3 and the side panel 7 is not damaged by the welding heat, and the quality and the assembling property of the cabin structure 1 of the completed construction machine can be compatible.

As shown in FIGS. 5(a) and 5(b), when electrodeposition coating is applied to the cab frame main body 3 before the side panels 7 are attached, the side of the cab frame main body 3 where the large opening 9 is formed faces downward. By immersing the cab frame main body 3 in the paint aqueous solution or the cleaning liquid 20 and pulling it up, the paint aqueous solution or the cleaning liquid 20 accumulated on the floor panel 8 of the lifted cab frame body 3 can be easily removed from the large opening 9. I can pull it out. Therefore, the time for running out of liquid can be shortened, and the so-called tact time can be shortened. In addition, in each step of electrodeposition coating shown in FIG. 6, the amount of liquid carried from the previous tank to the current tank and from the current tank to the next tank can be reduced, thereby improving the coating quality.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is of course not limited to the above-described embodiments, and various modifications within the scope of the claims can be made. It goes without saying that modifications also fall within the technical scope of the present invention.

For example, in FIG. 4, if the painted side panel 7 is detachably attached to the large opening 9 of the painted cab frame body 3 via a waterproof seal (not shown) with bolts, the side panel 7 can be removed. Therefore, the opening can be used as a service hole during maintenance. The painted side panel 7 and the side window 18 coated with the window frame 17 are integrated, and the integrated side panel with the side window is treated as the side panel, and bolts are inserted into the large opening 9 of the cab frame body 3. It may be attached by rivets or adhesive. This side panel with a side window may have a side window (glass portion) at the front instead of at the top.

INDUSTRIAL APPLICABILITY The present invention can be used for a cabin structure of construction machinery with improved ease of assembly of interior parts such as an instrument panel, a seat, and an air conditioner, and a manufacturing method thereof.

1 Cabin structure of construction machinery 2 Door 3 Cab frame body 4R Front pillar 4L Front pillar 5R Rear pillar 5L Rear pillar 6 Center pillar 7 Side panel 8 Floor panel 9 Large opening 19 Interior parts 19a Instrument panel 19b Seat 19c Air conditioner 20 Paint aqueous solution or cleaning liquid

Claims (3)

Front pillars are erected on the left and right of the front part of the floor panel, rear pillars are erected on the left and right of the rear of the floor panel, and a center pillar for doors is arranged between the front pillar and the rear pillar on either the left or right. a painted cab frame body having no center pillar and a large opening between the left and right front pillars and the rear pillar;
interior parts such as an instrument panel, a seat, an air conditioner, etc. carried and assembled into the cab frame main body through the large opening between the front pillar and the rear pillar on the opposite side of the door of the painted cab frame main body;
a painted side panel attached to the large opening between the front pillar and the rear pillar on the opposite side of the door of the painted cab frame body,
A cabin structure for a construction machine, wherein the painted side panel is attached to the large opening of the painted cab frame body by bolts, rivets or adhesive. A method of manufacturing a cabin structure for a construction machine according to claim 1,
Front pillars are erected on the left and right of the front part of the floor panel, rear pillars are erected on the left and right of the rear of the floor panel, and a center pillar for doors is arranged between the front pillar and the rear pillar on either the left or right. Manufacture a pre-painted cab frame body in which there is no center pillar between the left and right front pillars and the rear pillars and a large opening is formed,
Through the large opening between the front pillar and the rear pillar on the side opposite to the door of the cab frame body that has been painted, the interior parts such as the instrument panel, seats, air conditioner, etc. are brought into the cab frame body and assembled.
A cabin structure for a construction machine, characterized in that a painted side panel is attached by bolts, rivets or adhesives to a large opening of a painted cab frame body to which the interior parts are assembled. Production method. A method of manufacturing a cabin structure for a construction machine according to claim 1,
Front pillars are erected on the left and right of the front part of the floor panel, rear pillars are erected on the left and right of the rear of the floor panel, and a center pillar for doors is arranged between the front pillar and the rear pillar on either the left or right. Manufacture a cab frame body in which there is no center pillar between the left and right other front and rear pillars and a large opening is formed,
When the cab frame main body is submerged in a paint aqueous solution for electrodeposition coating or a cleaning liquid and then lifted up, the cab frame main body is tilted so that the large opening faces downward, and the cab frame body accumulates on the floor panel of the lifted up cab frame. Dropping the aqueous paint solution or cleaning liquid from the large opening,
Interior parts such as an instrument panel, a seat, an air conditioner, etc. are carried into the cab frame body through the large opening between the front pillar and the rear pillar on the side opposite to the door of the cab frame body coated in this way, and then assembled.
A cabin structure for a construction machine, characterized in that a painted side panel is attached by bolts, rivets or adhesives to a large opening of a painted cab frame body to which the interior parts are assembled. Production method.

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