JP2001322467A - Driver's cab for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an armrest for driver's seat of construction machine having a sufficiently functionable size as armrest regardless of the rotating angle of a console and capable of setting the rotating angle of the console regardless of the size of the armrest. SOLUTION: An interlocking means for interlocking the armrest 3 to the rotation of the console 5 is formed of a prescribed position 11 on the console 5 rotating on the circumference of a radius R about a prescribed rotating center 6 of the console 5, a projection part 12a provided in a prescribed position 12 on the armrest 3 rotating on the circumference of a radius r about a prescribed rotating center 7 of the armrest 3, and a push-pull cable 14 having one end fixed to the prescribed position on the console 5 and the other end mounted on the projection part 12a through a mounting member 13 having an elliptic hole 13a, so that the armrest 3 is rotated in the same direction as the console 5 according to the rotation of the console 5.

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 construction machine such as a hydraulic shovel in which a driver's armrest and a console are rotatably provided.

[0002]

2. Description of the Related Art Generally, the cab of a small construction machine is so narrow that it is difficult for an operator to move when getting on and off. For this reason, the driver's cab is provided with means for preventing the actuator from operating even when the operator accidentally touches the operation lever particularly when getting on and off, and measures have been taken to make getting on and off relatively easy. .

For example, the cab of a construction machine disclosed in Japanese Patent Application Laid-Open No. 8-137567 includes a driver's seat, an operation lever for operating the construction machine, and a console provided with the operation lever.

The above-mentioned console is provided with a gate lock device including a gate lock valve for cutting off the supply of pressure oil to the console, and a gate lock lever for operating the valve.

[0005] In particular, a mechanism is provided in the operator's cab to flip the console toward the driver's seat in conjunction with the operation of the gate lock lever described above.

In the cab configured as described above, before the operator gets off the construction machine, the gate lock lever is operated in advance to cut off the supply of the pressure oil to the pilot line and to move the console to the driver's seat side. Jump up.

[0007] This prevents the operator from, for example, hooking a clothing pocket on the operation lever and operating the actuator even when the operation lever is moved. Further, the console jumps up to the driver's seat side together with the operation lever, so that the space in front of the driver's seat is widened, and the operator can easily get on and off.

For example, a cab of a construction machine disclosed in Japanese Utility Model Laid-Open No. 5-40357 is provided with a backrest provided to be tiltable in the front-rear direction, an armrest rotatably provided on a side of the backrest, A lever is provided below the side of the seat and unlocks the tilt of the backrest.

The operator cab is provided with a mechanism for rotating the armrest upward by interlocking the armrest with the forward tilt of the backrest.

In such an operator's cab, when the backrest is tilted forward, for example, when the operator adjusts the tilt angle of the backrest, the armrest rotates upward in conjunction with the tilting of the backrest. Thereby, the armrest does not contact the operation lever, and it is possible to prevent the operation lever from being operated by mistake.

[0011]

However, the driver's cab of a small construction machine jumps up as described in Japanese Patent Application Laid-Open No. Hei 8-137567 because the operating lever provided on the console and the armrest are close to each other. When a console is provided, the size of the armrest must be set small so that the operation lever does not contact the armrest. In some cases, it may be necessary to remove the armrest. For this reason, there is a problem that usability as a driver's seat becomes poor.

Further, it is conceivable to set the rotation angle of the console small, but it is not advisable to reduce the space for the operator to get on and off the console.

Further, as in Japanese Utility Model Laid-Open No. 5-40357, if the driver's seat is capable of rotating the armrest, the console may be flipped up after the armrest is rotated upward. However, it is conceivable that the operator may jump up the console while forgetting to rotate the armrest, and this measure is not advantageous.

The object of the present invention has been made in view of the above-mentioned situation, and it is possible to provide a device having a size which can sufficiently function as an armrest irrespective of the rotation angle of the console, and to provide a size of the armrest. regardless of,
An object of the present invention is to provide a cab of a construction machine in which a turning angle of a console can be set to be large.

[0015]

Means for Solving the Problems In order to achieve the above-mentioned object, the invention according to claim 1 comprises a seat portion provided to be movable in the front-rear direction and the vertical direction, a backrest provided to be tiltable in the front-rear direction, And a driver's seat including an armrest rotatably provided on a side portion of the backrest, and a console rotatably provided on a side of the driver's seat and having an operation lever provided on an upper portion thereof. , The armrest and the console are connected to allow independent movement of the seat in the front-rear direction and the vertical direction, tilting of the backrest in the front-rear direction, and rotation of the armrest. In addition, when the console is rotated, the armrest is interlocked, and the armrest is rotated in the same direction as the console. And the arrangement comprising means.

According to the first aspect of the present invention, when the operator adjusts the position of the seat, the inclination angle of the backrest, and the angle of the armrest to desired positions, for example, the seat is moved forward and backward and up and down. The console remains in this state even if it is moved in the direction, the backrest is tilted back and forth, or the armrest is rotated.

Therefore, the position of the seat, the inclination angle of the backrest, and the angle of the armrest can be adjusted to positions desired by the operator.

Also, for example, when the operator turns the console upward when getting off the cab,
The interlocking means interlocks the armrest with the rotation of the console and turns the same in the same direction as the console. Thus, it is possible to prevent the operation lever provided on the console from coming into contact with the armrest.

Therefore, it is possible to provide a console having a size sufficient to function as an armrest irrespective of the angle of rotation of the console, and to set the rotation angle of the console large regardless of the size of the armrest. It is possible to secure a space for getting on and off.

According to a second aspect of the present invention, in the first aspect of the present invention, the interlocking means has a predetermined length and flexure, and includes a predetermined position on the console and a predetermined position on the armrest. A push-pull cable having one end fixed to one of the predetermined positions on the console, and the other end fixed to the other of the predetermined position on the console and the predetermined position on the armrest via a mounting member; A position and a protrusion provided at the other predetermined position of the predetermined position on the armrest, wherein the mounting member and the protrusion attached to the other end side of the push-pull cable are within a predetermined range. It is characterized by being relatively movably mounted.

According to the second aspect of the present invention, for example, one end of the push-pull cable is fixed to a predetermined position on the console, and the other end is attached to a projection provided at a predetermined position on the armrest. When it is attached via a member, it operates as follows.

For example, when the operator adjusts the position of the seat, the angle of the backrest, and the angle of the armrest to desired positions, the operator moves the seat in the front-rear direction and the up-down direction, tilts the backrest in the front-rear direction, When the armrest is rotated, the positional relationship between the armrest and the console changes.

Here, since the mounting member and the projection are relatively movably mounted within a predetermined range, even if the positions of the armrest and the console change, a pulling force acts on the push-pull cable. Nothing.

That is, the amount of movement of the projection provided at a predetermined position on the armrest is not transmitted to the console via the push-pull cable, so that the console keeps its state without rotating. In this way, the interlocking means allows independent movements of the seat in the front-rear direction and the vertical direction, the tilting of the backrest in the front-rear direction, and the rotation of the armrest.

When the console is rotated upward, a predetermined position on the console, that is, a fixed position of the push-pull cable, is rotated downward on a circle around a predetermined rotation center of the console. I do. For this reason, the protrusion of the armrest is largely separated from the predetermined position on the console, and a tensile force acts on the push-pull cable.

On the other hand, an attachment member attached to the push-pull cable is engaged with the projection, and pulls a predetermined position on the armrest downward.

The predetermined position on the armrest is rotated downward on a circle around a predetermined rotation center of the armrest. Accompanying this, the armrest pivots upward. Thus, the armrest can be turned at a turning angle corresponding to the turning angle of the console. Therefore, it is possible to prevent the operation lever provided on the console from coming into contact with the armrest.

Also, for example, one end of the push-pull cable is fixed to a predetermined position on the armrest, and the other end is attached to a projection provided at a predetermined position on the console via an attachment member. However, the operation is almost the same.

According to a third aspect of the present invention, in the second aspect of the present invention, a predetermined position on the armrest and a predetermined position on the console are determined by setting a rotation angle of the armrest to a rotation angle of the console. It is characterized in that the positional relationship is set to be larger than that.

According to the third aspect of the present invention, when the console is turned, the armrest turns at a larger angle than the console. This allows
Even when the position of the driver's seat is moved forward and the operation lever provided at the upper part of the console and the armrest come closer, the contact between the operation lever and the armrest can be avoided.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the predetermined position on the armrest and the predetermined position on the console are set such that the rotation angle of the armrest is equal to the rotation angle of the console. It is characterized in that the positional relationship is set to be at least twice as large as.

Further, the invention according to claim 5 is the invention according to claims 1 to
In the invention according to any one of Items 4, the construction machine is a hydraulic shovel.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a cab of a construction machine according to the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing an embodiment of the present invention. FIG. 2 is an explanatory view showing a state in which a console and an armrest are linked by a linking means provided in the embodiment shown in FIG. FIG. 4 is an explanatory view showing a state in which only the armrest is rotated according to the embodiment shown in FIG.
Is an enlarged view of a main part in a pivoted state of the armrest shown in FIG. 3,
FIG. 5 is a side view showing a small-sized construction machine provided with the embodiment shown in FIG.

In this embodiment, as shown in FIG. 5, an operator's cab 20 is provided on a construction machine, for example, a small hydraulic excavator 30. The operator's cab 20 includes an operator's seat 1 on which an operator sits, and a console 5 on which an operation lever 5a for operating a construction machine is provided.

The driver's seat 1 has a seat 4 provided to be movable in the front-rear direction and the up-down direction, a backrest 2 provided to be tiltable in the front-rear direction, and an armrest rotatably provided on a side of the backrest 2. 3 is provided.

The operator cab 20 includes a gate lock valve (not shown) for cutting off the supply of pressure oil to the pilot line, and a gate lock lever 21 provided on the side of the console 5 for operating the gate lock valve. Is provided.
Further, the console 5 described above includes a gate lock lever 21.
It is provided so as to rotate up and down in conjunction with the operation of.

In particular, the cab 20 of the present embodiment has
As shown in FIGS. 1 to 4, the above-described movement of the seat portion 4 in the front-rear direction and the up-down direction, the tilting of the backrest 2 in the front-rear direction, and the rotation of the armrest 3 allow independent operations, respectively. When the armrest 3 is rotated, the armrest 3 is interlocked, and an interlocking means 10 for rotating the armrest 3 in the same direction as the console 5 is provided.

This interlocking means 10 is, as shown in FIG.
One end is fixed to a position on the circumference of a rotation radius R about the predetermined rotation center 6 of the console 5, that is, a predetermined position 11, and the rotation radius r of the armrest 3 about the predetermined rotation center 7 is set at the center. A push-pull cable 14 having the other end fixed at a position on the circumference of the circle, that is, a predetermined position 12 via an attachment member 13 is provided.

The push-pull cable 14 is
It has a predetermined length and flexure, and has a function of transmitting the amount of axial movement of the wire between one end and the other end. Also,
A protrusion 12 is provided at a predetermined position 12 on the armrest 3 described above.
The protrusion 12a and the mounting member 13 are mounted so as to allow relative movement within a predetermined range.

That is, the mounting member 13 is made of, for example, a plate and has an elongated hole 13a in which the above-mentioned projection 12a is arranged so as to be engageable. That is, the mounting member 13 is provided with the protrusion 12a so as to be slidable in the elongated hole 13a.

The predetermined position 12 on the armrest 3 and the predetermined position 11 on the console 5 are, as shown in FIG. 2, the angle of rotation of the console 5 and the angle of rotation of the armrest 3. Then, r / R = {(1-cosα) / (1-cosβ)} (1) is provided.

In particular, in the present embodiment, the position of the armrest 3 is set to a rotation angle twice as large as the rotation angle of the console 5. That is, the turning radius r is equal to the turning radius R.
In contrast, the above equation (1) is set to satisfy the following equation (2) where 2α is substituted for the rotation angle β: r / R = {1/2 (1 + cosα)} (2) .

In the present embodiment configured as described above, when the gate lock lever 21 is not operated, that is, when the console 5 is not rotated upward, the seat 4
Is moved in the front-rear direction and the up-down direction, or the back and forth inclination angle of the backrest 2 or the angle of the armrest 3 is adjusted to an angle desired by the operator.
Works as follows.

For example, when the operator rotates only the armrest 3, as shown in FIG.
About the predetermined rotation center 7, that is, toward the console 5 side.

In this case, the projection 12a and the predetermined position 11 on the console 5 move in a direction approaching each other, and the projection 12a relatively moves within the elongated hole 13 of the mounting member 13.

Therefore, even if the armrest 3 is rotated, the pressing force or the pulling force is not transmitted to the push-pull cable 14, so that the predetermined position 11
The force for turning is not transmitted. Accordingly, when the console 5 is not jumped up and is stationary, the rotation of the armrest 3 is not restricted by the push-pull cable 14, and the console 5 is not rotated.
Can be rotated with respect to. That is, the interlocking means 10 can rotate the armrest 3 while keeping the console 5 stationary.

Similarly, when the entire driver's seat 1 is moved in the front-rear direction and the vertical direction, or when the backrest 2 is tilted in the front-rear direction, the armrest 3 is attached to the mounting member 1.
The console 5 can be moved while the console 5 is stationary without the movement being restricted by the push-pull cable 14 due to the relative movement between the 3 and the protrusion 12a. That is, the interlocking means 10 allows the seat part 4 to move in the front-rear direction and the vertical direction, and allows the armrest 3 to move with respect to the console 5 as the backrest 2 tilts in the front-rear direction.

Next, a case in which the gate lock lever 21 is operated when the operator gets off the cab 20 and the console 5 jumps up will be described with reference to FIG.

First, the predetermined position 11 on the console 5 is
As the console 5 rotates, the console 5 rotates downward on a circumference having a radius R around a predetermined rotation center 6 of the console 5. At this time, the predetermined position 11 on the console 5 pulls one end of the push-pull cable 14 downward.

The other end of the push-pull cable 14 pulls the projection 12 a on the armrest 3 downward through the mounting member 13. As a result, the projection 12a on the armrest 3 rotates downward on the circumference of a radius r around the predetermined rotation center 7 of the armrest 3.

At this time, the armrest 3 is
The armrest 3 rotates upward around a predetermined rotation center 7 at the same rotation angle as the rotation angle of “a”. That is, when the console 5 rotates to the rotation angle α, the armrest 3 rotates in the same direction as the console 5 to the rotation angle β = 2α. Thus, the armrest 3 does not contact the operation lever 5a provided on the console 5.

As described above, in this embodiment, the interlocking means 1
0, the armrest 3 is interlocked with the console 5 and rotated in the same direction as the console 5, so that the armrest 3 and the operation lever 5a provided on the console 5 are provided.
Never come in contact with Thereby, the armrest 3 having a sufficient size can be provided regardless of the rotation angle of the console 5, and the rotation angle of the console 5 can be set regardless of the size of the armrest 3. Therefore, the driver's seat 1 that is easy to use can be provided, and the rotation angle of the console 5 can be set so as to form a sufficient space for the operator to get on and off the vehicle.

In this embodiment, the interlocking means 10 is
The driving member 1 and the surroundings of the driver's seat 1 are constituted by the mounting member 13 formed of a plate, the protrusion slidably disposed in the elongated hole 13 a of the mounting member 13, and the push-pull cable 14. Can be provided in a limited space sandwiched between predetermined members provided in the device.

In this embodiment, one end of the push-pull cable 14 is fixed to a predetermined position 11 on the console 5 and the other end is attached to the projection 12 a on the armrest 3 via the attachment member 13. Although mentioned above, the present invention is not limited to this. That is, instead of providing the projection 12a on the armrest 3, a projection 12a is provided at a predetermined position 11 on the console 5, one end of the push-pull cable 14 is fixed to the armrest 3 side, and the other end is attached to the mounting member 13 Projection 1 provided on the upper side of console 5 through
2a.

In this embodiment, the rotation angle β of the armrest 3 linked to the console 5 is set to 2α with respect to the rotation angle α of the console 5, but the present invention is not limited to this. That is, the rotation angle of the armrest 3 may be set to be larger than the rotation angle 2α. For example, the armrest 5 may be placed on the side of the backrest 2 according to the rotation of the console 5.

[0057]

As described above, in the invention according to each of the claims of the present invention, the armrest is interlocked with the rotation of the console by the interlocking means and is rotated in the same direction as the console. The control lever does not contact. Thus, a sufficiently large armrest can be provided irrespective of the rotation angle of the console, and the rotation angle of the console can be set regardless of the size of the armrest. Therefore, it is possible to provide a driver's seat that is easier to use than before, and it is possible to set the rotation angle of the console so as to form a sufficient space for the operator to get on and off.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a cab of a construction machine according to the present invention.

FIG. 2 is an explanatory view showing a state in which a console and an armrest are linked by a linking means provided in the embodiment shown in FIG. 1;

FIG. 3 is an explanatory diagram showing a state in which only the armrest is rotated according to the embodiment shown in FIG. 1;

FIG. 4 is an enlarged view of a main part of the armrest shown in FIG. 3 in a rotating state.

FIG. 5 is a side view showing a small construction machine provided with the embodiment shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Driver's seat 2 Backrest 3 Armrest 4 Seat 5 Console 5a Operation lever 6 Predetermined center of rotation of console 7 Predetermined center of rotation of armrest 10 Interlocking means 11 Predetermined position on console 12 Predetermined position on armrest 12a Projection 13 Attachment member 13a Slot 14 Push-pull cable r Rotation radius at predetermined position on armrest R Rotation radius at predetermined position on console α Rotation angle of armrest β Rotation angle of console

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Katsumi Miyaki 650 Kandate-cho, Tsuchiura-shi, Ibaraki Hitachi Construction Machinery Co., Ltd. F-term in Tsuchiura Plant (reference) 2D015 EB01 3B087 CC08 CC10 DC02

Claims (5)

[Claims] 1. A driver seat including a seat portion provided to be movable in the front-rear direction and the up-down direction, a backrest provided to be tiltable in the front-rear direction, and an armrest rotatably provided on a side of the backrest. In a cab of a construction machine having a console rotatably provided at a side of a driver seat and an operation lever provided at an upper portion, the armrest and the console are connected to each other, and the front and rear direction and the vertical direction of the seat portion , The tilt of the backrest in the front-back direction, and the rotation of the armrest, while allowing independent operations, and when the console is rotated, the armrest is interlocked, and the armrest is moved. An operator's cab for a construction machine, comprising an interlocking means for rotating in the same direction as the console. 2. The interlocking means has a predetermined length and flexure, one end of which is fixed to one of a predetermined position on the console and a predetermined position on the armrest, and A push-pull cable having the other end fixed to the other of the position and the predetermined position on the armrest via a mounting member; and the other predetermined position of the predetermined position on the console and the predetermined position on the armrest. A mounting member attached to the other end of the push-pull cable and the projection are relatively movably mounted within a predetermined range. The cab of the construction machine described. 3. A predetermined position on the armrest and a predetermined position on the console are set in a positional relationship such that a rotation angle of the armrest is larger than a rotation angle of the console. 2. A cab for a construction machine according to 2. 4. A predetermined position on the armrest and a predetermined position on the console are set in a positional relationship such that a rotation angle of the armrest is at least twice a rotation angle of the console. The cab of the construction machine according to claim 3. 5. The cab of a construction machine according to claim 1, wherein the construction machine is a hydraulic shovel.