JP2014190086A - Cab sunshade structure for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cab sunshade structure for a construction machine which can coexist with other components around a cab roof of the construction machine and secure a dwelling space for an operator.SOLUTION: A sunroof 5 is provided between right and left roof beam materials 4R and 4L that extend in a longitudinal direction on both right and left sides of a cab upper part of a construction machine. On one of the right and left sides of the cab upper part, a space S is formed between the sunroof 5 and the roof beam material 4L to place a roller tube 11 of a roller blind 10 in the space S. On the other side, a retaining member 15 is provided to retain the pulled-out state of the roller blind 10.

Description

  The present invention relates to a sunshade structure provided in a cab of a construction machine such as a hydraulic excavator.

  In construction machines such as hydraulic excavators, a skylight with a transparent plate is provided on the roof of the cab (cab), and guide rails are provided in the roof in the front-rear direction on both sides of the skylight. ) Is movably provided (see, for example, Patent Document 1).

Japanese Utility Model Application Publication No. 60-184720

  However, the structure described in Patent Document 1 requires a space for the shading plate to move back and forth on the lower side of the roof in the cab, so it is difficult to arrange other components in the cabin of the cab ceiling. It was. Therefore, for example, if a ceiling wiper motor for wiping the skylight is disposed outside the upper part of the cab, the total height including the ceiling guard becomes high. In addition, there is a problem that the driver's living space cannot be secured sufficiently.

  Accordingly, an object of the present invention is to provide a cab sunshade structure for a construction machine that can ensure a living space for an operator while allowing coexistence with other parts near the cab ceiling of the construction machine.

  To achieve the above object, the present invention provides a sunshade structure provided in a cab of a construction machine, wherein a skylight is provided between left and right ceiling beam members extending in the front-rear direction on both left and right sides of the cab, A space is formed between the skylight and the ceiling beam material on one of the left and right sides, and a roll blind winding unit is disposed in the space, and the roll blind is disposed on the other side. There is provided a cab sunshade structure for a construction machine provided with a holding member for holding in a pulled-out state.

  Here, it is preferable that the skylight is provided at a position lower than the top surface of the ceiling beam material.

  Moreover, it is preferable that the winding part of the said roll blind is arrange | positioned at the side part on the opposite side to the side with a work attachment seeing from a driver | operator's seating position.

  Furthermore, it is preferable that the winding part of the said roll blind is located above the upper end of a door opening regarding an up-down direction.

  According to the cab sunshade structure of the construction machine according to claim 1, the roll blind take-up portion is disposed in the space between the skylight and the ceiling beam material on one side of the cab upper left and right sides, and the other Since the holding member is provided on the side portion, it is possible to arrange other components in the room near the cab ceiling. Furthermore, a sufficient space for the driver's living can be secured.

  According to the cab sunshade structure of the construction machine according to the second aspect, the skylight is provided at a position one level lower than the upper surface of the ceiling beam material. For this reason, a space is formed between the roof panel that connects the skylight and the ceiling beam material and the ceiling beam material, and a roll blind winding part can be placed in this space, and the space near the ceiling beam material can be efficiently used. Can be used.

  According to the cab sunshade structure of the construction machine according to claim 3, the winding part of the roll blind is disposed on the side opposite to the side where the work attachment is present when viewed from the seating position of the operator. When the operator performs work while looking at the work attachment, it is possible to prevent the view from being obstructed.

  According to the cab sunshade structure of the construction machine according to the fourth aspect, the winding portion of the roll blind is located above the upper end of the entrance opening in the vertical direction. That is, since the winding part does not protrude from the entrance / exit opening, it is difficult for an operator to get in and out of the cab.

1 is a schematic side view showing an appearance of a construction machine (hydraulic excavator) according to an embodiment of the present invention. The schematic perspective view which shows the cab of the hydraulic shovel of FIG. The perspective view which shows the cab upper part of the hydraulic shovel of FIG. AA line sectional view of Drawing 3. The BB sectional drawing of FIG. 3 which shows the state (open state) by which the roll blind was wound up. The figure which looked at the cab ceiling side from the inside of a cab in the state in which the roll blind was wound up. The BB sectional drawing of FIG. 3 which shows the state (closed state) by which the roll blind was pulled out. The figure which looked at the cab ceiling side from the inside of a cab in the state where the roll blind was pulled out.

  A cab sunshade structure for a construction machine according to an embodiment of the present invention will be described. In the present embodiment, a hydraulic excavator will be described as an example of a construction machine. First, the entire structure of the excavator 1 and the cab 4 will be described with reference to FIGS. In the following description, the front, rear, left and right directions are defined based on the operator seated in the cab 4.

  As shown in FIG. 1, the hydraulic excavator 1 includes a crawler-type lower traveling body 2A, an upper revolving body 2B mounted on the lower traveling body 2A so as to be rotatable about a vertical axis, and a front of the upper revolving body 2B. And the work attachment 3 attached to the part. The upper swing body 2B is provided with a cab (operator's cab) 4, and each operation of turning, running, and attachment operation is performed in the cab 4.

  As shown in FIG. 2, left and right ceiling beam members (pillars) 4L and 4R extending in the front-rear direction are formed on both the left and right sides of the upper portion of the cab 4 as a part of the skeleton of the cab 4. Between 4R, the skylight 5 which consists of a transparent plate for ensuring an upper visual field is provided.

  On the left side of the cab 4, a door 6 for an operator to get on and off is provided so as to be openable and closable. On the other hand, the work attachment 3 is located on the right side of the cab 4. In addition, illustration of the door 6 is abbreviate | omitted in FIG.

  Further, a front guard 7 and a rear guard 8 for protecting the roof 4A including the skylight 5 from falling objects are mounted on the roof 4A. Among these, the front guard 7 is closed to cover the skylight 5 (see FIG. 1, FIG. 3) and an open posture (FIG. 2) that opens above the skylight 5 can be opened and closed.

  As described above, the excavator 1 is provided with the skylight 5, and the cab 4 is provided with a cab sunshade structure mainly for protecting the operator from sunlight. The cab sunshade structure according to the present embodiment will be described with reference to FIGS. 4 is a cross-sectional view taken along line AA in FIG. 3, and FIGS. 5 and 7 are cross-sectional views taken along line BB in FIG.

  A roll blind 10 that can be opened and closed in the left-right direction along the skylight 5 is provided near the ceiling in the cab 4. doing.

  This will be described more specifically. As shown in FIG. 5, the left and right ceiling beam members 4L and 4R are members each having an atypical closed section. A roof panel 4B constituting a part of the roof 4A is joined to the upper surfaces of the ceiling beam members 4L and 4R by welding or the like. The roof panel 4B extends obliquely downward from the joint 4B1 to the ceiling beam members 4L and 4R so as to form a substantially S-shaped cross section, and is bent in the horizontal direction from a portion 4B2 extending obliquely downward. In 4B3, the skylight 5 is bonded. Due to such a structure, the skylight 5 is in a position that is one step lower than the upper surfaces (the surfaces at the highest position) of the ceiling beam members 4L and 4R.

  A space S surrounded by the ceiling beam material 4L and the roof panel 4B is formed between the skylight 5 and the ceiling beam material 4L on the left side of the upper part of the cab 4 (that is, the side where the door 6 is located), In this space S, the winding part 11 of the roll blind 10 is arranged. A blindfold panel 4C is disposed below the winding unit 11, and the blind fabric 12 is drawn out from a gap between the blindfold panel 4C and the roof panel 4B.

  A long frame 13 is attached near the tip of the blind fabric 12, and the operator can open and close the roll blind 10 by having the knob 13 on the frame 13 or further on the tip side. Since the structure of the roll blind 10 is well known, detailed description is omitted. However, a coil spring (not shown) is built in the winding unit 11, and the coil 13 is wound by the urging force of the coil spring when the frame 13 side is not held. The blind fabric 12 is wound and stored in the take-up part 11.

  On the other hand, on the roof panel 4B on the right side of the upper part of the cab 4, a holding member 15 for holding the blind fabric 12 of the roll blind 10 in a pulled out state (closed state) is attached. The closed state is held by hooking the frame 13 on the holding member 15.

  Note that a guide rail 4D for guiding a guide roller (not shown) provided on an openable front window is fixed to the left and right ceiling beam members 4L and 4R. 4D is located in the space S and between the ceiling beam member 4L and the winding part 11.

  In the present embodiment, the winding part 11 of the roll blind 10 is arranged on the left side as viewed from the seating position of the operator, that is, on the side opposite to the side where the work attachment 3 is located. Moreover, as shown in FIG. 5, the winding part 11 is located above the upper end (namely, the lower end of the ceiling beam material 4L) of the door opening (entrance opening) T regarding the up-down direction. That is, the winding unit 11 does not protrude from the door opening T.

  As shown in FIG. 4, the excavator 1 is equipped with a ceiling wiper 21 for wiping the skylight 5 (only a part of the ceiling wiper 21 is visible in the sectional view of FIG. 4). A motor 22 for operating the ceiling wiper 21 is provided inside the cabin 4. More specifically, as shown in FIG. 8, the motor 22 is disposed on the right rear side of the drawn roll blind 10 (blind fabric 12).

  Further, as shown in FIGS. 6 and 8, a pair of left and right speakers 23 are disposed near the ceiling inside the cab 4 and further behind the motor 22.

  As described above, according to the cab sunshade structure of the construction machine according to the present embodiment, the roll blind 10 is placed in the space S between the skylight 5 and the ceiling beam member 4L on the left side of the upper left and right sides of the cab 4. A winding member 11 is disposed, and a holding member 15 is provided on the right side. For this reason, other components such as the motor 22 and the speaker 23 of the ceiling wiper 21 can coexist on the indoor side near the cab ceiling. Furthermore, a sufficient space for the driver's living can be secured.

  On the other hand, in the configuration of the above prior art (utility model application publication No. 60-184720), a space for moving the light shielding plate back and forth is required, so it is difficult to dispose the wiper motor or the like near the indoor ceiling. . In addition, for example, a configuration in which a roll blind winding part is arranged near the cab rear ceiling and the blind is pulled forward is also conceivable. However, in this configuration, a space for arranging the winding part is separately required near the ceiling, and space efficiency is improved. Inferior in terms.

  Moreover, according to the cab sunshade structure of the construction machine by this embodiment, the motor 22 of the ceiling wiper 21 which wipes the skylight 5 is arrange | positioned indoors. For this reason, the problem that the motor 22 is arranged outside the upper part of the cab and the total height including the ceiling guard becomes high can be avoided.

  In addition, according to the cab sunshade structure of the construction machine according to the present embodiment, the skylight 5 is provided at a position one level lower than the upper surface of the ceiling beam material 4L. Thereby, a space S is formed between the roof panel 4B connecting the skylight 5 and the ceiling beam material 4L and the ceiling beam material 4L. Since the winding part 11 of the roll blind 10 can be arrange | positioned in this space S, the space near the ceiling beam material 4L can be utilized efficiently.

  Furthermore, according to the cab sunshade structure of the construction machine according to the present embodiment, the winding portion 11 of the roll blind 10 is the side opposite to the side (right side) where the work attachment 3 is located when viewed from the seating position of the operator. (Left side). For this reason, it can suppress that an operator obstructs a visual field when performing work while looking at the work attachment 3.

  Furthermore, according to the cab sunshade structure of the construction machine according to the present embodiment, the winding portion 11 of the roll blind 10 is located above the upper end of the door opening T in the vertical direction. That is, since the winding unit 11 does not protrude from the door opening T, it is difficult for the operator to get in and out of the cab 4.

  The cab sunshade structure of a construction machine according to the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope described in the claims.

  For example, in the above-described embodiment, the winding part 11 of the roll blind 10 is arranged on the left side (entrance / exit side) of the upper part of the cab 4 and the holding member 15 is arranged on the right side (side with the work attachment 3). The arrangement of the winding unit and the holding member may be reversed left and right.

  In the above-described embodiment, the motor 22 and the speaker 23 of the ceiling wiper 21 are exemplified as other components provided near the cab ceiling. However, other components may be used.

  As described above, the cab sunshade structure for a construction machine according to the present invention is useful as a cab sunshade structure for protecting an operator in a cab from sunlight in a construction machine such as a hydraulic excavator used for construction work or the like. .

1 hydraulic excavator, 2A lower traveling body, 2B upper turning body,
3 work attachment, 4 cab, 4A roof,
4B roof panel, 4B1 joint, 4B2 part, 4B3 other end,
4C panel, 4D guide rail, 4L, 4R ceiling beam material,
5 skylight, 6 door, 7 front guard, 8 rear guard,
10 Roll blind, 11 Winding part, 12 Blind fabric,
13 frame, 14 knob, 15 holding member,
21 Ceiling wipers, 22 motors, 23 speakers.

Claims (4)

A sunshade structure provided in a cab of a construction machine,
Skylights are provided between the left and right ceiling beams extending in the front-rear direction on the left and right sides of the upper part of the cab,
On one side of the cab upper left and right sides, forming a space between the skylight and the ceiling beam material, and arranging a roll blind winding portion in the space,
A cab sunshade structure for a construction machine, characterized in that a holding member for holding the roll blind in a pulled-out state is provided on the other side.   2. The cab sunshade structure for a construction machine according to claim 1, wherein the skylight is provided at a position one level lower than an upper surface of the ceiling beam member.   The construction machine according to claim 1 or 2, wherein the winding part of the roll blind is disposed on a side part opposite to the side where the work attachment is present when viewed from the seating position of the operator. Cab sunshade structure. 4. The cab sunshade structure for a construction machine according to claim 3, wherein the winding part of the roll blind is located above the upper end of the entrance opening in the vertical direction.

Images