JP2872934B2 - Driver's cab - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cab of a vehicle suitable for use in a construction machine such as a hydraulic shovel or a hydraulic crane.

[0002]

2. Description of the Related Art Vehicles for construction machines such as hydraulic shovels and hydraulic cranes have an operator cab (cabin) defined by a plurality of panels such as a front panel, a rear panel, left and right side panels, and a ceiling panel. The operator's cab is provided with a driver's seat on which the operator sits and various operation devices. The operator's cab is provided with an entrance for an operator to enter and exit, and a handrail is provided near the entrance and exit to assist the operator in getting in and out of the vehicle safely and quickly.

A driving cab of a hydraulic excavator will be described as an example of a driving cab of a vehicle according to the prior art with reference to FIGS.

[0004] In the drawings, reference numeral 1 denotes a lower traveling body, 2 denotes an upper revolving body which is rotatably provided on the lower traveling body 1, and the upper revolving body 2 is mounted on the lower traveling body 1 via a revolving device 3. A swing frame 4 provided so as to be able to swing, a machine room 5 provided on the swing frame 4 and housing an engine, a hydraulic pump (both not shown) and the like, and a rear side of the machine room 5 And a counter weight 6 provided at the rear of the turning frame 4 and an operator's cab 8 described below provided at the left front of the turning frame 4. In the center of the front part of the revolving frame 4, a working machine 7 for excavating earth and sand is provided so as to be able to move up and down.

[0005] Reference numeral 8 is provided on the revolving frame 4, and is provided with operating equipment such as a driver's seat 9 on which an operator sits, an operating pedal 10A, an operating lever 10B, and a console box 10C provided with various instruments and switches. The cab 8 is surrounded by a floor panel 11, a front panel 12, a rear panel 13, a left panel 14, a right panel 15, and a ceiling panel 16 provided on the floor panel 11. It is formed in a rectangular box shape. The front panel 12, the rear panel 13, the right side panel 15, and the ceiling panel 16 are provided with windows (all not shown), and the left side panel 14 is provided with a side window 14A behind. .

A door 17 is provided on the left side panel 14 as a doorway. The door 17 is attached to the center of the left side panel 14 through a pair of upper and lower door hinges 18 so as to be opened and closed. ing. The door 17 is provided with a door window 17A.

Reference numeral 19 denotes a door 17 on the left side panel 14.
2 shows a support pillar provided on the rear side of the support pillar 1;
9 is an outer panel 19A located outside the cab 8;
An inner panel 19B is located in the cab 8 and faces the outer panel 19A. The support pillar 1 is formed by forming a closed space 20 having a substantially rectangular cross-sectional shape between the outer panel 19A and the inner panel 19B.
The rigidity of the door 9 is increased, and the door 17 which is attached to be openable and closable via a door hinge 18 is firmly supported. At two locations (only one location is shown) vertically separated from the inner panel 19B, a mounting hole 19C is formed, and a nut 21 is fixed so as to be concentric with the mounting hole 19C. 24 is screwed.

Reference numeral 22 denotes a cab 8 located near the door 17.
The inner handrail 22 is fixed to the inner panel 19B of the support pillar 19 via a bolt 24 as described later. And
The inner handrail 22 is used for safely and promptly getting on and off by gripping when the operator gets on and off the cab 8 via the door 17.

Here, the configuration of the inner handrail 22 is shown in FIG.
This will be described with reference to FIG.

In the drawing, reference numeral 23 denotes a handrail main body which constitutes an inner handrail 22 together with a support pillar 19 and a bolt 24. The handrail main body 23 has a cylindrical holding portion 23A extending in the vertical direction of the cab 8; A flat mounting portion 23B provided at both ends of the portion 23A.
Is provided with a through hole 23C.

Reference numeral 24 denotes a bolt as a fastening member for fixing the handrail body 23 to the left side panel 14.
As shown in FIG. 8, the washer 25, a through hole 23C formed in the mounting portion 23B of the handrail body 23, and the support pillar 19
Is inserted through a mounting hole 19C formed in the inner panel 19B, and is screwed to a nut 21 fixed to the inner panel 19B. Thereby, the handrail main body 23 is fixed to the left side panel 14 by the bolt 24 via the support pillar 19.

Reference numeral 26 denotes a resin cover mounted on the gripping portion 23A of the handrail main body 23.
3 serves to buffer the contact of the operator with the handrail 3 and to prevent slippage when the handrail body 23 is gripped.

Reference numeral 27 denotes an outside handrail located near the door 17 and provided outside the cab 8.
As with the inner handrail 22, this is for ensuring safety when the operator gets on and off the driver's cab 8 through the door 17.

In the cab 8 provided with the handrails 22 and 27 configured as described above, the operator operates the outer handrail 27.
By gripping the inner handrail 22 and the inside handrail 22, it is possible to get into the cab 8 safely and quickly. Then, the operator who gets into the driver's cab 8 performs excavation work of earth and sand by the working machine 7 by sitting on the driver's seat 9 and operating the operation pedal 10A, the operation lever 10B, and the like.

[0015]

However, since a large vibration acts on the driver's cab 8 during excavation work by the working machine 7, the operator seated in the driver's seat 9 shakes greatly in the driver's cab 8 due to the vibration. May occur.

In this case, the inner handrail 22 according to the prior art described above has a head of a bolt 24 for fixing the handrail body 23 to the left side panel 14 from the surface of the inner panel 19B of the support pillar 19 located in the driver's seat 8. Since it is configured to protrude toward the driver's seat 9, there is a problem that the operator who has shaken in the driver's cab 8 comes into contact with the head of the bolt 24, thereby impairing comfortable workability.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and is intended to prevent a fastening member for fixing a handrail to a panel defining a driver's cab from reliably protruding from the panel surface. It is intended to provide a driver's cab.

[0018]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a first aspect of the present invention is a panel surrounding a driver's seat and defining a driver's cab, and a driver getting on and off the driver's cab. A handrail provided on the panel, and a fastening member for fixing the handrail to the panel, wherein the panel has a recess at a portion where the handrail is fixed, and the fastening member has a recess in the recess. It is characterized in that it is configured to accommodate the head.

In this case, the depth of the depression of the recess is set so that the head of the fastening member has a height substantially equal to or less than the same plane with respect to the surface of the panel. It is desirable.

Further, as in the third aspect of the present invention, it is preferable that the handrail is provided near a doorway provided in a cab.

Further, it is more desirable that a protective cap be put on the head of the fastening member.

[0022]

According to the first aspect of the present invention, the head of the fastening member is accommodated in the recess provided at the portion of the panel where the handrail is fixed, and the head of the fastening member protrudes from the surface of the panel. By being prevented, even if the driver in the driver's cab shakes due to the vibration of the driver's cab, the driver can be reliably prevented from contacting the head of the fastening member.

According to the second aspect of the present invention, the head of the fastening member accommodated in the concave portion of the panel has a height substantially equal to or less than the same plane with respect to the surface of the panel. A person can be reliably prevented from contacting the head of the fastening member.

Further, according to the third aspect of the present invention, the driver gets on and off the driver's cab while holding the handrail provided near the entrance and exit, so that the driver can get on and off the driver's cab safely and quickly. Can be done.

According to the fourth aspect of the present invention, the driver in the cab contacts the head of the fastening member by covering the head of the fastening member housed in the recess of the panel with the protective cap. Even in such a case, the impact received by the driver can be suppressed.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the embodiments, the same components as those of the above-described conventional technology are denoted by the same reference numerals, and description thereof will be omitted.

First, FIGS. 1 to 3 show a first embodiment of the present invention.

In the drawing, reference numeral 31 denotes an inner handrail according to the present embodiment. The inner handrail 31 has a handrail main body 35 and a bolt 24, which will be described later, substantially in the same manner as the above-described prior art inner handrail 22. It differs from the prior art in that a concave portion 34 is formed in the inner panel 32B of the support pillar 32 to which the main body 35 is fixed.

Reference numeral 32 denotes a door 17 on the left side panel 14.
3 shows a support pillar provided on the rear side of the support pillar 3;
2 is composed of an outer panel 32A and an inner panel 32B in substantially the same manner as the support pillar 19 according to the prior art, and forms a closed space 33 having a substantially rectangular cross-sectional shape between the outer panel 32A and the inner panel 32B. By the door 17
Is firmly supported.

Numeral 34 denotes an inner panel 32B of the support pillar 32.
The concave portion 34 is provided in FIG. 2 and FIG.
As shown in FIG.
2 places (only one place is shown) to which the mounting portion 35B is fixed
The outer panel 32A is recessed toward the outer panel 32A.
A mounting hole 34A is formed in the center of the concave portion 34, and the nut 21 is fixed so as to be concentric with the mounting hole 34A.

Reference numeral 35 denotes a handrail main body which forms the inner handrail 31 together with the support pillar 32 and the bolt 24. The handrail main body 35 has a grip 35A, a mounting part 35B and a through hole 35C, similarly to the handrail main body 23 of the prior art. However, between the grip portion 35A and the mounting portion 35B, a bent portion 35D for projecting the grip portion 35A toward the cab 8 is provided.
Are formed.

Then, the mounting portion 35B of the handrail body 35 is
The recessed portion 34 formed in the inner panel 32B of the support pillar 32 is brought into contact with the recessed portion 34, the washer 25, the through hole 35C formed in the mounting portion 35B, and the mounting hole 34 formed in the concave portion 34.
By screwing the bolt 24 to the nut 21 via A, the handrail body 35 is
And is fixed to the left side panel 14 via the.

The depth S of the recess 34 from the surface of the inner panel 32B is determined by the thickness of the mounting portion 35B of the handrail body 35 fixed to the recess 34, the head of the bolt 24, and the washer 25. Are set so as to be equal to or greater than T (S ≧ T). Therefore, the inner panel 3 of the support pillar 32
The head of the bolt 24 for fixing the handrail main body 35 to the inner panel 32B is accommodated in the recess 34 so that the inner panel 32B
Exists on the same plane or less with respect to the surface of. For this reason, even when the operator seated in the driver's seat 9 shakes greatly due to the vibration acting on the cab 8 during excavation work or the like, the operator is reliably prevented from coming into contact with the head of the bolt 24. And comfortable workability can be secured.

Further, by providing the concave portion 34,
Since the rigidity of the portion of the inner panel 32B to which the handrail main body 35 is fixed is improved, the strength of the entire inner handrail 31 is improved, and the safety when the passenger gets on and off the driver's cab 8 while holding the inner handrail 31 is improved. It can be further improved.

FIG. 4 shows a second embodiment according to the present invention. In this embodiment, the same components as those in the above-described first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In the drawing, reference numeral 41 denotes a protective cap put on the head of the bolt 24. The protective cap 41 is
For example, formed of an elastic resin material such as rubber,
It is fitted to the head of the bolt 24 with interference.

In the inner handrail 31 thus constructed, the handrail body 3 is attached to the inner panel 32B of the support pillar 32.
The head of the bolt 24 for fixing the bolt 5 is accommodated in the recess 34 and the head of the bolt 24 is covered with the protective cap 41. In addition to being able to reliably prevent contact, even if the operator contacts the head of the bolt 24, the impact received by the operator can be remarkably reduced, further improving work safety. Can be done.

In each of the above embodiments, the case where the bolt 24 is used as the fastening member for fixing the handrail body 35 to the support pillar 32 has been described as an example, but the present invention is not limited to this. For example, another fastening member such as a pin or a rivet may be used.

Further, in each of the above embodiments, the case where the inner handrail 31 is provided on the left side panel 14 has been described as an example. However, the present invention is not limited to this. Panel.

Further, in each of the above embodiments, the inner handrail 31 provided in the cab 8 has been described as an example. However, the present invention is not limited to this. It may be applied to handrails that are used.

Furthermore, in each of the above embodiments, the operation cab of a hydraulic shovel has been described as an example. However, the invention may be applied to the operation cab of another construction vehicle such as a hydraulic crane or a wheel loader.

[0042]

As described above in detail, according to the first aspect of the present invention, when the handrail is fixed to the panel defining the driver's cab, the fastening member is provided in the recessed portion provided at the portion of the panel where the handrail is fixed. The head of the fastening member is prevented from protruding from the surface of the panel by accommodating the head of the driver, even if the driver shakes due to the vibration of the driver's cab, Contact with the head of the fastening member can be reliably prevented, and comfortable workability can be ensured. Furthermore, by providing the recessed portion, the rigidity of the portion of the panel to which the handrail is fixed is improved, so that the strength of the entire handrail is improved, and the safety when the user gets on and off the driver's cab while holding the handrail is improved. It can be further improved.

According to the second aspect of the present invention, the head of the fastening member accommodated in the recess of the panel has a height substantially equal to or less than the same plane with respect to the surface of the panel. A person can be reliably prevented from contacting the head of the fastening member.

Furthermore, according to the third aspect of the present invention, the driver can get on and off the driver's cab while holding the handrail provided near the doorway, so that the driver can get on and off the driver's cab safely and quickly. Can be.

Further, according to the structure of the fourth aspect, by covering the head of the fastening member housed in the recess of the panel with the protective cap, the driver may come into contact with the head of the fastening member. Even in this case, the impact received by the driver can be effectively suppressed.

[Brief description of the drawings]

FIG. 1 is a partially broken plan view showing a state in which a first embodiment of the present invention is applied to a hydraulic shovel.

FIG. 2 is an enlarged sectional view showing a configuration of an inner handrail shown in FIG.

FIG. 3 is a side view seen from the direction of arrows III-III in FIG. 2;

FIG. 4 is an enlarged sectional view of the same position as FIG. 2 showing a second embodiment of the present invention.

FIG. 5 is a partially broken external view showing a conventional hydraulic excavator.

FIG. 6 is an enlarged external view showing the cab shown in FIG. 5;

7 is a partially broken plan view showing the inside handrail of the cab according to the prior art at the same position as in FIG. 1. FIG.

FIG. 8 is an enlarged sectional view showing a configuration of an inner handrail shown in FIG. 7;

[Explanation of symbols]

 8 Operator cab 14 Left side panel (panel) 24 Bolt (fastening member) 31 Inner handrail 32 Support pillar 34 Depressed part 35 Handrail body 41 Protective cap

Claims (4)

(57) [Claims] 1. A panel surrounding a driver's seat and defining a driver's cab, a handrail provided on the panel for a driver to get on and off the driver's cab, and a fastening for fixing the handrail to the panel. A driver's cab for a vehicle, comprising: a member, wherein the panel is provided with a concave portion at a portion where the handrail is fixed, and the head of the fastening member is accommodated in the concave portion. 2. The vehicle according to claim 1, wherein a depth of the recess is set such that a head of the fastening member has a height substantially equal to or less than a plane with respect to a surface of the panel. Driver's cab. 3. The cab of a vehicle according to claim 1, wherein the handrail is provided near a doorway provided in the cab. 4. The cab of a vehicle according to claim 1, wherein the head of the fastening member is covered with a protective cap.