JPH11264154A - Working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To widen a space for treading on a pedal by preventing a space S in the vicinity of feet from being limited by a handrail. SOLUTION: The working machine has a driving section 16 with an operating section 15 disposed in upright from a machine body 13, a canopy installed so as to cover the upper section of the driving section 16 through a support 18 mounted on the machine body at the side place of the operating section 15 and an operating pedal 34 set up to the machine body 13 on the reverse side place to the support 18. The driving section 16 has a handrail 33, and the handrail 33 is extended from the support 18 to the operating section 15 side and reaches up to the end section of the operating section 15 on the operating pedal 34 side while being fitted so as to be connected to the upper section of the operating section 15 at that time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working machine such as a backhoe.

[0002]

2. Description of the Related Art Conventionally, a driving unit 16 of a backhoe is provided with a handrail for an operator to grip when getting on and off the driving unit. For example, as shown in FIG. 7, the conventional handrail 51 has an inverted L shape as a whole, extends horizontally from the front support column 18 of the canopy so as to cross the front of the operation unit 15, and passes through the operation unit 15. At the side of the operation unit 15 so as to be connected to the swivel (body) 13.

[0003]

However, the operation unit 15
The operation pedal 34 is provided on the side of, and when the handrail is disposed at such a position, the space S for stepping on the pedal 34 with the foot is limited by the handrail, and there is a problem that the pedal 34 is difficult to press. . The present invention has been made in view of the above circumstances, and an object of the present invention is to increase the space for stepping on a pedal so that a space S near a pedal is not limited by a handrail.

[0004]

The present invention has taken the following technical means in order to solve the above-mentioned problems. That is, the feature of the present invention is that an operation unit having an operation unit erected from the airframe and a column provided on the airframe at a side position of the operation unit are provided so as to cover above the operation unit. In a work implement having an operation pedal provided on the body at a side position opposite to a canopy and a support, the operating unit includes a handrail, and the handrail extends from the support to the operation unit side and extends toward the operation unit. It is provided so as to reach the side of the operation unit and to be connected to the upper part of the operation unit.

According to the above construction, the handrail is connected not to the body but to the upper part of the operation part, so that the space on the side of the operation part of the body having the operation pedal is not restricted by the handrail, and the space for the foot is reduced. It becomes wider and easier to press the pedal. In addition, a feature of the present invention is that an operation unit having an operation unit erected from the airframe and a support provided on the airframe at a side position of the operation unit are provided so as to cover above the operation unit. In a working machine provided with a canopy, the operating unit includes a handrail, and the handrail extends substantially horizontally from the support to the operation unit side so as to pass through the upper front of the operation unit, and is operated on the opposite side to the support. There is also a point that it is provided so as to reach the side of the unit and to be connected to the upper part of the operation unit.

[0006] As described above, the handrail is provided so as to connect the operation portion and the column of the canopy. Therefore, the handrail also plays a role of reinforcing the mounting state by connecting the operation portion and the column. In other words, in the past, the support and the operation unit were merely erected from the body, but by connecting the operation unit and the support provided on the body with a handrail, the body, the support and the handrail were -Since the operation part is connected in a closed loop, the support is strengthened by the support part and the operation part, and the mounting becomes strong.

In particular, the handrail extends substantially horizontally from the column to the operation unit side so as to pass through the upper front of the operation unit, reaches the operation unit side opposite to the column, and is connected to the upper part of the operation unit. So that the closed loop is
It is a large one that connects the support and the side of the operation unit opposite to the support, and high stability is obtained.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. Excavator 1 shown in FIGS. 2 and 3
Reference numeral 0 denotes a traveling device 12 having a rubber crawler-type traveling crawler belt 11, and a swivel (airframe) 1 above the traveling device 12.
3 is supported so as to be capable of turning drive. On the upper left side of the swivel base 13, there is disposed an operation unit 16 including an operator's seat 14 and an operation unit 15 having an operation lever 15 a, and on the right side of the swivel base 13, a backhoe device 17 is mounted. ing. A pair of front and rear columns 18 are erected at the left and right centers of the swivel base 13, and a canopy 19 that covers the upper part of the operation unit 16 is attached to the upper end of the column 18. A partition plate 20 for separating the device 17 from the operation unit 16 is provided. In addition, a dozer device 21 is mounted on a front portion of the traveling swivel 12.

The driving section 16 includes a driver's seat 14 and the turntable 1.
A handrail 33 is provided in addition to the operation unit 15 erected at the position 3. The handrail 33 is made of a single rod-shaped member. The handrail 33 is provided so as to extend from the column 18 to the operation unit 15 side and reach a side portion of the operation unit 15 in a direction opposite to the column 18. That is, one end 33a of the handrail 33
Is mounted and supported on the left side (right side in FIG. 1) of the operation table 15b of the operation unit 15 via a mounting member 33b. The other end 33 c of the handrail 33 is attached to and supported by the right column of the front columns 18 of the canopy 19.

The front column 18 is located on the right side of the operation unit 15 and slightly in front of the operation unit 15.
The other end 33c of the handrail 33 is attached to the support column 18 at a position slightly above the upper end of the operation console 15b. The handrail 33 extends horizontally from this attachment position to the left side of the fuselage (to the right in FIG. 1). It is positioned to pass across the front of the part 15.

In the vicinity of the left end of the operation part 15, the rear part is bent rearward (see FIG. 2) and extends rearward to the position of the operation part 15, and further bent downward to the position of the mounting member 33. It extends and is attached to the operation unit 15. Here, an operation pedal 34 is provided on the swivel table 13 at a position on the left side of the operation table 15a. Since the handrail 33 is provided as described above, the space S above the operation pedal 34 is not limited by the handrail 33, and the space at the foot of the operator is widened, and the pedal can be easily depressed.

As shown by a two-dot chain line X in FIG. 1, the swivel 13, the column 18, the handrail 33, and the operation table 15b
Are connected in a closed loop, so that the respective mountings are very strong and the mounting state is stable. The one end 33a of the handrail 33 may be attached to an arbitrary position of the operation console 15, but as described above, the handrail 33 is made to cross the front of the operation console 15 to secure the handrail 33 long. Is preferred.

The handrail 33 may be attached to the operation console 15b at a plurality of locations. That is, the handrail is branched at an intermediate portion in the longitudinal direction of the handrail 33, and the operation console 1
5b may be attached to another position (for example, the right side of the operation table 15b), or may be attached to an arbitrary position of the swivel table 13. The backhoe device 17 includes a boom 22 that is connected to the swivel base 13 via a boom support shaft 35 in a horizontal direction so as to be vertically swingable.
An arm 23 is connected to the tip of the arm 2 so as to be swingable about the left and right axes, and a bucket 24 is connected to the tip of the arm 23 so as to be swingable about the left and right axes. The boom 22 is driven to swing up and down by a boom cylinder 25 interposed between the swivel table 13 and the boom 22,
Is driven to swing back and forth by an arm cylinder 26 interposed between the boom 22 and the arm 23, and the bucket 24 is driven by a bucket cylinder 27 interposed between the arm 23 and the bucket 24 to oscillate. Is done.

The boom 22 includes a first boom portion 28 connected to the swivel 13, a second boom portion 29 connected to the tip of the first boom portion 28 so as to swing left and right, and a second boom. The support bracket 30 is connected to the distal end of the portion 29 so as to be able to swing left and right. The base end of the arm 23 is connected to the support bracket 30.

A link 31 is attached between the vicinity of the distal end of the first boom portion 28 and the support bracket 30, and the first boom portion 28, the second boom portion 29, the support bracket 30, and the link 31 are used. A parallel quadruple link is configured, and the hydraulic cylinder 32 swings the second boom portion 29 to thereby control the arm 23.
And the bucket 24 can be moved left and right in parallel. Note that the arm cylinder 26 is
It is interposed between the support bracket 30 and the arm 23.

Here, as shown in FIGS. 4 and 5, the first boom portion 28 includes a U-shaped member 37 having an inverted U-shaped cross section and a U-shaped member 37.
And a bottom plate 38 for closing the lower end opening of the character member 37,
The bottom plate 38 is fixed at both lower ends of the U-shaped member 37 by welding. As described above, by forming the first boom portion 28 by the U-shaped member 37 and the bottom plate 38, the welding portion 3
9 may be two places, and the number of welding places is small, so that the manufacturing cost can be reduced.

The bottom plate 38 is formed as a single unit in the entire first boom portion 28, while the U-shaped member 37 is composed of a first U-shaped member 37a on the boom support shaft 35 side and a second U-shaped member on the boom tip side. It is configured separately from the member 37b. That is, the bottom plate 37 has a length that extends over the first and second U-shaped members 37a and 37b, and the first U-shaped member 37a and the second U-shaped member 37b are welded to the bottom plate 37, respectively, and as a whole, FIG. A first boom portion 28 is formed as shown.

When the first boom portion 28 is constituted by the U-shaped member 37 and the bottom plate 38, as shown in FIG.
9 can only be formed outside the first boom part 28 and cannot be welded inside. Therefore, in order to secure the strength of the first boom portion 28, the inner rib 40 attached to the inside of the first U-shaped member 37a so as to partition the internal space in the longitudinal direction.
Are welded. A hole 41 is formed at a position corresponding to the inner rib 40 of the bottom plate 38, and the inner rib 40 and the bottom plate 38 are formed.
Is fixed by plug welding using this hole 41.

The bottom plate 38 has its boom tip side welded and fixed to a thick plate 39 connected to the second boom portion 29. As shown in FIG. 6, the swivel base 13 has a fuel tank and an oil tank 45 on the left side of the boom support part 44, an engine 46 is mounted on the rear side, and a weight 48 is mounted on the rear part.

Inside the weight 48, a weight adjusting weight 49 is detachably attached by bolts 50. The weight adjusting weight 49 is for coping with a change in weight without replacing the entire weight 48 when attaching various attachments having different weights to the work machine. The cross section taken along the line BB of FIG. 6 is shown as a partially broken cross-sectional view in FIG. 2, and as shown in FIG. 2, the weight adjustment weight 49 has an inverted L-shape in a side view. The weight 48 is a weight adjusting weight 49.
A notch having an inverted L-shaped cross section is formed inside the weight 48 and at the center in the left-right direction so that the weight adjustment weight 49 can be avoided while avoiding interference with the engine 46 and the like.
There is enough space for mounting.

Further, since the notch for attaching the weight adjusting weight 49 is provided inside the weight 48, the appearance of the entire work machine 1 is not impaired. When the attachment of the work machine is replaced, the bolt 50 is removed and the weight adjustment weight 49 is replaced with another one to balance the weight. In addition, by employing the weight 48 in combination with the weight adjusting weight 49 in this manner, parts can be shared between excavating machines of different types. That is, if the weight adjusting weight 49 according to the weight balance of the working machine is mounted, the common weight 48 can be used between working machines of different types.
Cost can be reduced.

The present invention is not limited to the above embodiment.

[0023]

As described above, according to the present invention, even if a handrail is provided, a space for a worker's foot is secured, so that the operation pedal can be easily depressed. In addition, the handrail strengthens the mounting of the canopy post and the operation unit, and the mounting state is stabilized.

[Brief description of the drawings]

FIG. 1 is an enlarged front view of an operation unit of a working machine.

FIG. 2 is a side view of the working machine.

FIG. 3 is a plan view of the working machine.

FIG. 4 is a side view showing a first boom portion of the work machine.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a plan view of the swivel base.

FIG. 7 is a front view showing a conventional driving unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Excavation work machine 13 Revolving base (body) 15 Operating part 15a Operating lever 15b Operating base 16 Operating part 18 Post 19 Canopy 33 Handrail 33a One end (of handrail) 33b Attachment member 33c The other end of (handrail) 34 Operating pedal

Claims (2)

[Claims] An operation unit (1) erected from a body (13).
5) and a canopy provided to cover the upper part of the operation unit (16) via a support (18) provided on the body at a position lateral to the operation unit (15). 19) and a working machine provided with an operation pedal (34) provided on the body (13) at a side position opposite to the column (18), wherein the operating unit (16) includes a handrail (33); The handrail (33) is moved from the support (18) to the operation unit (1).
5) The operation section (15) extending toward the operation pedal (34).
A working machine which is provided so as to reach a side portion and to be connected to an upper portion of an operation portion (15). 2. An operation unit (1) erected from a body (13).
5) and a canopy provided to cover the upper part of the operation unit (16) via a support (18) provided on the body at a position lateral to the operation unit (15). 19), the operating section (16) includes a handrail (33), and the handrail (33) is connected to the operating section (1) from the column (18).
5) It extends substantially horizontally so as to pass through the upper front of the operation unit (15), and the operation unit (1) on the opposite side to the column (18).
5) A working machine characterized by being provided so as to reach a side portion and to be connected to an upper portion of an operation portion (15).