JP2000168499A - Driver's seat device for construction machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the seat belt installing performance by latching at least a long-size seat belt part of each seat belt part with a back rest part of a seat. SOLUTION: A lock tool 29 for latching a long-size seat belt part 26 is provided in a bracket 20 for fitting an arm rest 21 at a left side of a back rest part 19. With this structure, a driver can easily operate the lock tool 29 while sitting on a seat part 18. Slip-down of the seat belt part 26 from the seat part 18 onto the floor plate is prevented by latching the seat belt part 26 with the lock tool 29. Furthermore, since the lock tool 29 is provided at a position lower than the arm rest 21, convenience of using the lock tool 29 is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driver's seat device of a construction machine suitable for use in a driver's cab of a hydraulic shovel, a hydraulic crane, a wheel loader, and the like.

[0002]

2. Description of the Related Art Generally, a construction machine such as a hydraulic shovel for excavating earth and sand or a hydraulic crane for carrying materials to a high place is provided with a cab defining an operator cab. A driver's seat device on which a driver sits is installed in the inside (for example, Japanese Patent Application Laid-Open No. 8-28237).

[0003] A driver's seat apparatus for a construction machine according to this type of prior art is provided with a seat support provided on a floor plate in a cab of the construction machine and a rear side provided on the seat support. The seat is substantially constituted by a seat having a backrest, and long and short seat belts attached to the left and right sides of the seat support and connected to each other on the seat. In this case, a connection fitting is provided on the distal end side of the long seat belt portion, and a buckle portion for the connection fitting is provided on the distal end side of the short seat belt portion.

[0004] When the driver of the construction machine is seated on the seat, he or she connects one connecting fitting to the other buckle to fasten the seat belt, and restrains the driver himself on the seat. By doing so, safety during work and running is ensured. In addition, when the driver leaves the seat, the connecting fitting is separated from the buckle to release the seat belt.

However, with the seat belt released,
If the seat belt part is left as it is, for example, when the driver stands up from the seat, the long seat belt part slides down on the floor plate together with the connecting bracket, for example, the seat between the lever stand and the seat. The belt part may enter.

Therefore, in the driver's seat apparatus according to the prior art,
Paying attention to the left and right lever stands arranged on both the left and right sides of the seat, one of these lever stands is provided with a hook portion, and a long seat belt portion is provided on this hook portion. Of the connecting bracket is hooked. When the driver stands up from the seat, the long seat belt is hung on the lever stand, so that the seat belt falls to the floor plate side, and the gap between the lever stand and the seat is lowered. It is intended to prevent intrusion.

[0007]

By the way, in the driver's seat apparatus according to the prior art, a slide mechanism for moving the seat forward and backward with respect to the seat support, and a reclining mechanism for changing the angle of the backrest of the seat. By operating these, the driver changes the position and posture of the seat to improve the operability during work and running.

However, when the positions of the seat and the backrest are changed by operating each mechanism of the driver's seat device, the relative position between the latch provided on the lever stand and the seat changes. In some cases, it is difficult for the driver's hand to reach the latching portion, or the latching portion of the lever stand may be hidden behind the driver on the seat.

For this reason, in the prior art, when the driver locks or removes the long seat belt portion with respect to the lever stand, the driver checks the position of the locking portion provided on the lever stand side. However, there is a problem in that extra work is required and the burden on the driver cannot always be reduced.

In particular, the driver's seat device is provided with armrests on both left and right sides of the backrest, so that the armrest is interposed between the driver sitting on the seat and the lever stand. I will. For this reason, according to the prior art, when the driver locks or removes the connection fitting of the seat belt portion with respect to the locking portion, the armrest is in the way, and this operation cannot be easily performed. There's a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and the present invention can improve the seat belt wearing property by locking a seat belt portion at a predetermined position of a backrest portion. It is an object of the present invention to provide a driver's seat device for construction machinery.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a first aspect of the present invention is to provide a seat support provided on a floor plate in a cab of a construction machine, and a seat support provided on the seat support. And a long and short seat belt portion attached to the left and right sides of the seat support and connected to each other on the seat, respectively, On the backrest side of the seat, there is provided a stopper for hooking at least a long seatbelt portion of each seatbelt portion.

[0013] With this configuration, for example, the driver separates the seatbelt to release the seatbelt in order to rise from the seat, and puts the long seatbelt on the backrest side. To prevent the long seatbelt portion from falling from the seat onto the floorboard. On the other hand, when the driver sits on the seat and connects the respective seat belt portions to fasten the seat belt, the driver can easily connect the two by removing the long seat belt portion from the stopper. Can be.

In addition, since the stopper is provided on the backrest side of the seat, even when the position of the seat or the backrest is changed, the relative position between the seat and the stopper is fixed and the driver is not moved. Can be easily reached, the seat belt portion can be easily hooked and removed from the stopper, and the stopper can be easily used.

According to a second aspect of the present invention, a bracket for mounting an armrest is provided on each of the left and right sides of the backrest on the seat, and one of the left and right brackets is provided with a lower bracket than the armrest. That is, a stopper is provided at the lower position.

With such a configuration, the armrest does not intervene between the driver sitting on the seat and the stopper, and the driver uses the stopper located below the armrest. Thereby, the seat belt portion can be easily hooked and removed.

According to a third aspect of the present invention, the stopper is made of an elastic material so as to hold the seat belt in a retaining state when the seat belt is hooked.

With this configuration, when the seat belt portion is hooked on the stopper, the seat belt portion is hooked against the elastic force of the stopper. This allows
In a state where the seat belt portion is hooked on the stopper, the elastic force can prevent the seat belt portion from being accidentally detached from the stopper and can be held in the retaining state.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a case in which a driver's seat apparatus of a construction machine according to an embodiment of the present invention is applied to a hydraulic shovel will be described with reference to FIGS.

Reference numeral 1 denotes an undercarriage, and reference numeral 2 denotes an upper revolving body which is mounted on the undercarriage 1 via a revolving device (not shown) so as to be revolvable. The revolving superstructure 2 has a frame structure. The swivel frame 3 comprises a swing frame 3 as a main body frame, a building cover 4 defining a machine room provided on the swing frame 3, a cab 5 and a counterweight 6 defining an operator cab. A work device 7 to be described later is provided on the front side of.

Reference numeral 7 denotes a working device provided at a front portion of the upper revolving unit 2. The working device 7 is provided on a mounting bracket (not shown) fixed to a front portion of the revolving frame 3 so as to be able to move up and down. A boom 8, an arm 9 provided on the tip side of the boom 8 so as to be able to move up and down, and a bucket 10 provided rotatably on the tip side of the arm 9. 9 and bucket 10 are boom cylinder 1
1. Operated by arm cylinder 12 and bucket cylinder 13.

Reference numeral 14 denotes a cab box constituting an outer frame of the cab 5, and the cab box 14 has a structure as shown in FIG.
The cab box 14 is formed by a floor plate 14A, left and right side portions 14B and 14C, front and rear side portions (not shown), and an upper surface portion 14D.
Is provided.

Reference numeral 15 denotes a driver's seat device provided in the cab box 14 of the cab 5, and the driver's seat device 15 is provided in FIG.
As shown in FIG. 3, a seat support 16 mounted on a floor plate 14A of a cab box 14 and formed in a box shape by a plate material such as metal, a seat 17 to be described later, a seat belt 2
5 and the like.

Reference numeral 17 denotes a seat provided on the seat support 16 on which a driver sits. The seat 17 comprises a seat portion 18 provided on the seat support 16 and serving as a seat surface, and the seat portion 18. A backrest 19 erected on the back side of the vehicle, armrests 21 and 21 provided on both left and right sides of the backrest 19 via brackets 20 and 20, and an upper part of the backrest 19. The headrest 22 is provided.

The seat 17 is provided with a seat support 16.
A sliding mechanism for moving the seat 17 forward and backward, and a reclining mechanism (neither is shown) for changing the angle between the seat portion 18 and the backrest portion 19.

Reference numerals 23 and 24 denote left and right lever stands provided on the floor plate 14A of the cab box 14 at both left and right sides of the seat 17, respectively.
Reference numerals 3 and 24 are formed in an elongated box shape. The working device 7 is provided above the lever stands 23 and 24.
Operating levers 23A and 24A for controlling the operation of the boom 8, the arm 9, the bucket 10, and the like.

As shown in FIG. 2, small gap spaces S1 and S2 are provided between the lever stands 23 and 24 and the seat support 16 (seat seat 17), respectively. The seatbelts 26 and 27 of the seatbelt 25 to be described later are passed from the left and right ends of the seat support 16 to the upper side of the seat 17 by the clearance spaces S1 and S2.

Reference numeral 25 denotes seat belts provided at both left and right end portions of the seat support 16.
As shown in FIG. 4, the seat belt 16 is attached to the left side of the seat support 16 and can be adjusted in length according to the driver. It is constituted by a short seatbelt 27 described later which is connected to the seatbelt 26. The seat belt 25 is provided with seat belt portions 26, 2
By connecting the members 7 to each other, a seat belt 25 is worn by a driver sitting on the seat 17 and the driver is restrained on the seat 17.

Reference numeral 26 denotes a long seat belt portion which forms a part of the seat belt 25. As shown in FIG. 4, the seat belt portion 26 is formed of a long band formed of cloth or leather material or the like. Belt portion 26A and the belt portion 2
6A, a slide portion 26B provided at an intermediate position of the belt portion 26A to adjust the length of the belt portion 26A by sliding with respect to the belt portion 26A, and a belt portion 26A provided at one end side of the belt portion 26A. And a convex-shaped connecting metal fitting 2 provided with a rectangular connecting hole 26D1 provided on the other end side of the belt portion 26A.
6D.

Here, the mounting portion 26 of the seat belt portion 26
C is located in the clearance space S1 and is attached to the left side of the seat support 16 by a bolt 28 screwed into a bolt hole (not shown) of the seat support 16. The belt portion 26A of the seat belt portion 26 is passed from the clearance space S1 to the upper side of the seat 17 so that the connection fitting 26D is provided.
Is connected to a buckle 27C of a seatbelt 27 described later near the abdomen of the driver sitting on the seat 17.

Reference numeral 27 denotes a short seat belt portion which forms a part of the seat belt 25. As shown in FIG. 4, the seat belt portion 27 is a short belt formed of a cloth or leather material so as to form a belt. A belt portion 27A and the belt portion 27A
The belt portion 27A is provided on one end side of the seat support 1.
6 and a belt portion 2
The buckle 27C is provided on the other end of the seat belt 7A and is detachably connected to a connection fitting 26D of the seat belt 26 by a button operation.

The buckle portion 27C has a connection fitting 2 attached thereto.
Push button 27D for connecting and disconnecting 6D
Is provided. Further, the mounting portion 27B of the seat belt portion 27 is located in the clearance space S2 in FIG. 2, and is secured to the right side of the seat support 16 by a bolt 28 screwed into a bolt hole (not shown) of the seat support 16. Mounted on the part.
The belt portion 27A of the seat belt portion 27 is passed from the clearance space S2 to the upper side of the seat 17.

Reference numeral 29 denotes a stopper provided on the backrest portion 19 side of the seat 17. The stopper 29 is formed by, for example, bending a metal plate or the like having spring properties by a press or the like, and has a base end. The fixing portion 29A includes a fixing portion 29A serving as a side, and a bent portion 29B extending upward from the fixing portion 29A and having a distal end bent in a substantially rectangular shape.

The fixing part 29A of the stopper 29 is attached to the bracket 20 provided on the left side of the backrest 19 by the bolt 3
0, and the stopper 29 is
It is arranged below. A connection hole 26D1 of a connection fitting 26D (seat belt portion 26) is inserted into the bent portion 29B of the stopper 29 from above, whereby the seat belt portion 26 is hooked on the stopper 29. is there.

Here, the bent portion 29B of the stopper 29 has a distance d1 from the bracket 20, as shown in FIGS. 6 and 7, and the distance d1 is larger than the thickness d2 of the connection fitting 26D. Is also formed small. When the connecting fitting 26D is hooked on the stopper 29, the bent part 29B of the stopping part 29 is elastically deformed to be larger than the thickness dimension d2 of the connecting fitting 26D, and the connecting fitting 26D is bent.
B bent into connection hole 26D1 against elastic force of B
Insert.

Further, in a state where the connection fitting 26D is hooked on the stopper 29, as shown in FIG. 7, the bent portion 29B of the stopper 29 has a separation dimension d1 that is smaller than the thickness dimension d2 of the connection fitting 26D. Also returns to a small state, and the connecting bracket 26D
Is prevented from inadvertently coming off from the stopper 29. In addition, the connecting fitting 26D is formed by external vibration or the like.
Even if the bend moves out of the bent portion 29B of the stopper 29, the bent portion 29B of the stopper 29
The connection fitting 26D can be held by the stopper 29 in a retaining state.

The hydraulic shovel according to the present embodiment has the above-described configuration. Next, the operation of the hydraulic shovel will be described.

First, when the driver sits on the seat 17 in the cab box 14 and operates the operating levers 23A and 24A of the lever stands 23 and 24, the boom 8 and the arm 9 of the working device 7 are raised and lowered. With bucket 1
By rotating the zero, excavation work such as earth and sand is performed.

In this case, when the driver wears the seat belt 25 on the seat 17, the driver is restrained on the seat 17, and safety during work and running is ensured. be able to.

When the operation of the excavator is stopped and the driver leaves the seat 17, the buckle 27
By operating the button C, the seat belt portions 26 and 27 are separated from each other, and the wearing state of the seat belt 25 is released.

Here, in the present embodiment, a stopper 29 for engaging the long seat belt portion 26 is provided.
Even if the driver is seated on the seat 17, it is fixedly provided on a bracket 20 provided on the left side of the backrest 19,
The driver can easily reach the position of the stopper 29.

Therefore, when the driver releases the seat belt 25 and stands up from the seat 17, the driver can easily attach the long seat belt portion 26 to the stopper 29 while sitting on the seat 17. Can be hung. Accordingly, it is possible to prevent the connection fitting 26D of the seat belt 25 from sliding down from the clearance space S1 to the floor plate 14A of the cab box 14, and prevent the seat belt portion 26 from entering the clearance space S1 between the lever stand 23 and the seat 17.

On the other hand, when the driver sits on the seat 17 and wears the seat belt 25, the driver removes the seat belt portion 26 hooked by the stopper 29, and connects one of the connecting fittings 26D and the other buckle portion 27C. Concatenate. In this manner, by attaching the connection fitting 26D of the seat belt portion 26 to a predetermined position (under the armrest 21), the work of mounting the seat belt 25 can be easily performed.

The stopper 29 is located on the left side of the backrest 19 and below the armrest 21.
Therefore, even when the seat 17 is moved forward and backward by the slide mechanism, or when the angle between the seat 18 and the backrest 19 is changed by the reclining mechanism, the relative position between the seat 17 and the stopper 29 is changed. Can be kept almost constant.

Therefore, the driver can easily confirm that the stopper 29 is located below the armrest 21 on the right arm side, and the connecting hole 26D1 of the connecting bracket 26D is inserted into the stopper 2
9 can be easily inserted into the bent portion 29B.

Furthermore, since the stopper 29 is located below the armrest 21, the armrest 21 does not intervene between the driver sitting on the seat 17 and the stopper 29. For this reason, the long seat belt portion 2
Even when the hook 6 is hooked to the stopper 29 and removed,
The armrest 21 does not become an obstacle, and the stopper 29 can be easily used.

Further, since the stopper 29 is formed of a metal material having a spring property, the bent part 29 of the stopper 29 in a state where the connecting fitting 26D is hooked on the stopper 29.
B indicates that the separation dimension d1 is the thickness dimension d of the connection fitting 26D.
Since it has returned to a state smaller than 2, the connecting bracket 26
D can be prevented from accidentally coming off the stopper 29.

In the embodiment, the long seat belt portion 26 is hooked on the stopper 29. However, the present invention is not limited to this, and the bracket located on the right side of the backrest portion 19 is not limited to this. Needless to say, it is also possible to provide a stopper at 20 and hook the short seat belt portion 27 to this stopper.

Further, in the embodiment, the excavator has been described as an example, but the present invention is not limited to this, and may be applied to other construction machines such as a hydraulic crane and a wheel loader.

[0050]

According to the first aspect of the present invention, as described in detail above, at least one of the long and short seat belt portions is hooked by the backrest of the seat. When the driver separates the seatbelt in order to get up from the seat, for example, the long seatbelt should be hooked to the stopper provided on the backrest side. Thereby, the seat belt wearing property can be improved.

Further, since the stopper is provided on the side of the backrest, in order to improve the operability of the operation lever and the like by the driver,
Even if the position of the seat and backrest is changed, the relative position between the seat and the stopper can be fixed, the stopper can be arranged at a position easily accessible from the driver, and the stopper can be used easily. Can be.

According to the second aspect of the present invention, one of the left and right armrest brackets is provided with a stopper at a position below the armrest.
The driver can easily lock the seat belt portion to the stopper located below the armrest.

Further, according to the third aspect of the present invention, the stopper is formed of a material having a spring property, and the seat belt is held in the latched state by the stopper when the seat belt is latched. Utilizing the elasticity of the tool,
The seat belt portion can be held in a hooked state, and it is possible to prevent the seat belt portion from being accidentally detached from the stopper due to external vibration or the like.

[Brief description of the drawings]

FIG. 1 is a front view showing a hydraulic excavator according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a seat or the like in a cab, as viewed from a direction indicated by arrows II-II in FIG.

FIG. 3 is an enlarged perspective view showing a seat, a seat belt, and the like in FIG. 2;

FIG. 4 is an enlarged perspective view showing a seat belt.

FIG. 5 is a partial perspective view showing a state before a connection fitting of a seat belt portion is hooked on a stopper.

FIG. 6 is an enlarged side view showing a bracket and a stopper.

FIG. 7 is a side view showing a state in which a connection fitting of the seat belt portion is hooked on a stopper.

[Explanation of symbols]

 Reference Signs List 5 Cab 14 Cab box 14A Floor plate 15 Driver's seat device 16 Seat support 17 Seat seat 18 Seat 19 Backrest 20 Bracket 21 Armrest 25 Seatbelt 26 Long seatbelt 26D Connection fitting 27 Short seatbelt 29 Stop Ingredient

Claims (3)

[Claims] 1. A seat support provided on a floor plate in a cab of a construction machine, a seat seat provided on the seat support and having a backrest on a back side, and the seat support A long and short seatbelt portion attached to the left and right sides of the seat and connected to each other on the seat, respectively. A driver's seat device for a construction machine, comprising a stopper for hooking at least a long seat belt portion of each seat belt portion. 2. The seat seat is provided with brackets for attaching armrests to both left and right sides of the backrest, and one of the left and right brackets has a lower bracket than the armrest. 2. The driver's seat device for a construction machine according to claim 1, wherein the stopper is provided at a position. 3. The driver's seat of a construction machine according to claim 1, wherein the stopper is formed of an elastic material so as to hold the seat belt in a retaining state when the seat belt is hooked. apparatus.