JPH0858415A - Operator seat system - Google Patents

Abstract

PURPOSE: To provide such an operator seat system that eliminates any interference between an arm rest and an operation lever, even when a seat back is pushed down. CONSTITUTION: In an operator seat system 15 provided with an operator seat 55 having a seat back 22 which is possible to be laid frontward, an arm rest 26 rotatably which is attached to the seat back 22, and an operation lever 36 which is arranged in the adjacent to the operator seat 55 and operated by the operator, interference prevention means 26a, 38 which prevent interference between a arm rest 26 and the operation lever 36 by rotating the arm rest 26 when a seat back 22 is laid frontward, are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operator seat system which is installed in a working machine such as a construction machine and allows an operator to operate the working machine while sitting down. The present invention relates to an operator seat system including an interference prevention mechanism that prevents interference between an armrest of a seat and an operation lever that occurs when the seat is used.

[0002]

2. Description of the Related Art Generally, a working machine such as a construction machine is provided with an operator seat so that an operator can sit down and perform an operation. FIG. 5 schematically shows an example of an operator seat system including such an operator seat. As shown in the figure, the operator seat system 100 includes an operator seat 101 and an operation unit 102 provided in the vicinity of the operator seat 101 and having an operation lever 103.

The operator seat 101 comprises a seat body composed of a seat cushion 106 and a seat back 105. Seat cushion 106 and seat back 1
The seat back 105 is provided at the connecting portion 107 for connecting the vehicle back 05.
A support shaft 109 that rotatably supports the seat back 105 is provided, and the seat back 105 can be rotated with respect to the seat cushion 106. That is, the seat back 105 can be tilted forward as needed. Therefore, for example, when a storage box for storing the air conditioner device, tools, etc. is installed on the rear side of the operator's seat 101, the operator operates the air conditioner device etc. with the seat back 105 tilted forward. Operate or move tools in and out. That is,
By pushing down the seat back 105, the operator can easily carry out work such as taking in and out of tools.

Armrests 110, 110 are provided on both sides of the seat back 105. These armrests 110, 110 are rotatably connected to the side surface of the seat back 105 via a support shaft 108.

[0005]

By the way, when the seat back 105 is pushed forward as necessary, such as when the operator's seat 101 is used for work such as taking in and out of a tool, the seat back 105 is pushed forward, as shown in FIG. 5 (b). As shown in FIG.
May interfere with the operation lever 103 of the operation unit 102, and the operation lever 103 may move. Therefore, there is a risk that the working machine may unexpectedly move and injure workers around the working machine. In this case, there is no problem as long as the engine is stopped or the safety lock state in which the hydraulic power source of the operation lever 103 is cut off is set, but it is always said that the operator seat 101 is pushed down in such a state. Not exclusively.

For this reason, conventionally, when the seat back 105 is pushed down, the operator carefully lifts the armrest 110, and pays strict attention so that the armrest 110 and the operation lever 103 do not interfere with each other.

However, forcing the operator to pay considerable attention to the interference between the armrest 110 and the operation lever 103 each time the seat back 105 is pushed down, not only unnecessarily increasing the operator's attention, but also the armrest 110 one by one. It is not preferable from the standpoint of work efficiency or safety measures, since the work of lifting the above is extremely complicated.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an operator seat system in which the armrest and the operating lever do not interfere with each other even when the seatback is pushed down. To do.

[0009]

In order to solve the above-mentioned problems, the present invention provides an operator seat having a seat back which can be laid down forward, and an armrest rotatably attached to the seat back. In an operator seat system including an operation lever that is installed near the operator seat and that is operated by an operator, when the seat back is tilted forward, the armrest is rotated to move the armrest and the operation lever. It is provided with an interference prevention means for preventing the interference with. According to this configuration, the interference between the armrest and the operation lever is reliably prevented, and it is possible to prevent the operation lever from operating unexpectedly.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a working machine equipped with an operator seat system of the present invention. The work machine 1 is a shovel machine that performs excavation work using a bucket 12, and includes a carriage 4 and a revolving structure 3 rotatably mounted on the top of the carriage 4.

A boom 8 which can be raised and lowered by a boom cylinder 7 is attached to the revolving structure 3, and an arm 10 which is rotatable by an arm cylinder 9 is attached to the tip of the boom 8.
Is attached. Further, a bucket 12 which is tiltable by a tilt cylinder 11 is attached to the tip of the arm. In this case, the boom 8, the arm 10,
A working unit 20 is constituted by the bucket 12.

The carriage 4 includes a sprocket wheel 6a,
The crawler belt 5 is mounted on the outer circumference of an underbody device 6 including an idle wheel 6b and a piston / cylinder mechanism (not shown) provided between the wheels 6a and 6b.

Further, the revolving structure 3 is provided with an operation room 2 for operating the working unit 20, traveling of the carriage 4, rotating the revolving structure 3, and the like. And this operation room 2
Is provided with an operator seat system 15 that allows the operator to perform operations while sitting down.

FIG. 2 shows the main structure of the operator seat system 15. Note that FIG. 3 is a plan view of FIG. As shown in FIG. 2, the operator seat system 15 includes an operator seat 55 and an operation unit 60 provided near the operator seat 55.

The operator seat 55 has a seat body composed of a seat cushion 24 and a seat back 22. The headrest 21 is detachably attached to the upper end of the seatback 22. Seat cushion 24
A support shaft 29 that rotatably supports the seat back 22 is provided at a connecting portion 30 that connects the seat back 22 and the seat back 22, so that the seat back 22 can be rotated with respect to the seat cushion 24. Has become. That is, the seat back 22 can be tilted forward as needed.

Armrests 26, 26 are provided on both sides of the seat back 22. These armrests 26, 26 are rotatably connected to the side surface of the seat back 22 via a support shaft 27.

A storage box 35 for storing tools and the like is installed on the rear side of the operator seat 55. In addition, a pole 2 as a handrail is provided on the immediate side of the operator seat 55.
3 are erected. The upper end of the pole 23 is fixed to the inner wall of the operation room 2, and the lower end is fixed to the floor of the operation room 2.

On the other hand, the operating portion 60 has a traveling lever 40 involved in traveling of the carriage 4 and the like, and operating levers 36 installed on both sides of the operator's seat 55 to drive the working portion 20. The consoles 28, 28 and a safety lock lever 42 capable of shutting off the hydraulic power source of the operating lever 36 are provided.

The consoles 28, 28 are formed by collectively installing keys, push buttons, meters, indicators, switches, etc., and are rotatably connected to the base of the operation unit 60 via a support shaft 39. There is. Further, the consoles 28, 28 are provided with operation levers 36 for driving the working unit 20. The operation lever 36 is provided near the operator seat 55 and at a position where the operator can easily operate it so that the operator can perform the operation in a posture as easy as possible.

A console raising handle 38 for rotating the consoles 28, 28 upward is provided near the operation lever 36. The console raising handle 38 is movable back and forth within a certain range, and in the lock position shown by the solid line in FIG. 2 (the position pushed out most forward), the console 28 is at its basic position (the position shown by the solid line in the figure). ) Fixed. Further, when the console raising handle 38 is pulled from this locked position toward the hand side, the fixed state (locked state) of the console 28 is released, and the console 28 can be rotated upward. Therefore, in this unlocked state, the console raising handle 3
By pulling 8 further toward the hand side, the console 28 can be pulled up as shown by the chain double-dashed line in the figure. That is, by gripping the console raising handle 38 and rotating the console 28 upward, the operation lever 36, which is an obstacle when the operator enters and leaves the operation chamber 2, can be retracted upward.

A hose 32 is connected to the console 28. The hose 32 is formed in a bellows shape so as to follow the rotation of the console 28, and transmits operation signals from an operation lever 36 installed in the console 28, various operation switches, and the like inside the hose 32. A plurality of signal cables or hydraulic hoses are collectively inserted and arranged. The operation signal transmitted by these signal cables or hydraulic hoses is transmitted to the control unit (not shown), and the control unit controls the hydraulic pressure from the hydraulic source to the hydraulic drive unit of the working machine based on the transmitted operation signal. Drive control of the control valve that controls the flow of.

A safety lock lever 42 is provided on the outside of the console 28. The safety lock lever 42 functions as a safety device that shuts off the hydraulic power source of various operation levers to prevent accidental malfunctions. That is, when the safety lock lever 42 is in the basic position shown by the solid line in the figure, operation signals from the operation lever 36 and various operation switches can be transmitted to the control valve via the control unit. However, when the safety lock lever 42 is pulled up to the lock position shown by the alternate long and short dash line in the figure, the hydraulic power sources of various operation levers are shut off via the shutoff mechanism 50. That is, in this state, no matter how much the operation lever or the like is operated, the working machine is not driven at all. Note that FIG. 3 shows the safety lock lever 42 in a raised state.

Further, the safety lock lever 42 is
The basic position shown by the solid line in the figure is set to a position that obstructs the entrance and exit of the operator to and from the operation room 2. That is, the operator cannot easily get in and out of the operation chamber 2 unless the safety lock lever 42 is rotated and pulled up. By setting the basic position in this way, even when the operator touches the operation lever 36 when the operator enters or leaves the operation room 2, the safety lock lever 42 is in the locked position. Therefore, it is possible to avoid a situation in which the working machine operates by mistake.

Further, setting the basic position of the safety lock lever 42 to a position that obstructs the entrance and exit of the operator means to set the safety lock lever 42 to a position where the operator's eyes are easily seen. In this way, by providing the safety lock lever 42 at a position where the operator can easily see the eyes, the operator can easily recognize the operable state or the inoperable state depending on the position state of the safety lock lever 42. be able to.

FIG. 4 is a schematic diagram in which the most characteristic structure of the present embodiment is drawn in a simple and easy-to-understand manner. The operator seat system 15 of the present embodiment is provided with an interference preventing means for preventing the armrest 26 and the operating lever 36 from interfering with each other, and the interference preventing means is a guide surface formed on the lower surface of the console raising handle 38 and the armrest 26. And 26a. In this case, the console raising handle 38 is provided at a position where it abuts on the guide surface 26 a of the armrest 26 when the seatback 22 is pushed forward, and the consolerest handle 38 with respect to the operation lever 36.
Prevent contact of 6. Further, the guide surface 26a of the armrest 26 is formed in a smooth curved surface which is convex downward, and rotates the armrest 26 in the escape direction away from the operation lever 36 while contacting the console raising handle 38.

That is, when the seat back 22 is pushed forward from the basic position shown in FIG. 4 (a) as shown in FIG. 4 (b), first, the guide surface 26a formed on the lower surface of the armrest 26 is consoled. It contacts the lifting handle 38. This state is shown by the solid line in FIG.
Then, when the seat back 22 is further pushed forward from this state, the armrest 26 draws a locus along the curved surface shape of the guide surface 26a as shown by the dotted line in the figure, and the operation lever 36 with the support shaft 27 as the center. Rotate in the escape direction away from. In this case, the console lift handle 3
8 acts as a guide member that assists the armrest 26 to rotate in the escape direction. That is, the armrest 26
Along with the rotation of the seat back 22 toward the operation lever 36 side, the console raising handle 38 and the guide surface 26.
With a, it is guided in the escape direction. Therefore,
Even if the seat back 22 rotates in the direction of the operation lever 36, the armrest 26 rotates in the escape direction away from the operation lever 36 and interference with the operation lever 36 is prevented.

Further, in this configuration, even when the console 28 is pulled up by the console raising handle 38 (shown by the chain double-dashed line in FIG. 2), the console raising handle 38 hits the guide surface 26a of the armrest 26, The armrest 26 rotates in the escape direction away from the operation lever 36 as shown by the chain double-dashed line in FIG. That is, the interference between the armrest 26 and the operation lever 36 is prevented even when the console 28 is pulled up instead of pushing the seatback 22 forward.

Although the console raising handle 38 is movable back and forth between the locked position and the unlocked position, when the seat back 22 is pushed down to bring the console raising handle 38 and the armrest 26 into contact with each other,
Since the console raising handle 38 is in the lock position in which it is pushed out most forward, it cannot be moved further forward. Therefore, when the armrest 26 comes into contact with the console raising handle 38, the console raising handle 38 does not move forward and the armrest 26 and the operating lever 36 do not interfere with each other.

As described above, according to the operator seat system 15 of the present embodiment, even if the seat back 22 is pushed down in order to move the tool in and out of the storage box 35, the armrest 26 contacts the operation lever 36. However, since the armrest 26 interferes with the operation lever 36, the armrest 26 interferes with the operation lever 36 by hitting the console raising handle 38 and rotating in the escape direction away from the operation lever 36.
6 does not move. Therefore, there is no danger that the working machine will unexpectedly move and injure workers around it.

Further, unlike the conventional case, when the seat back 22 is pushed down, it is not necessary to perform a complicated work such as lifting the armrest 26 by hand, and the armrest 26 and the operating lever 36 should not be interfered with each other. Since there is no need to pay, safety is improved and work efficiency is improved.

Further, in this embodiment, the interference preventing means which is a characteristic component and the safety lock lever 4 described above are provided.
The combination of 2 and 2 constitutes a double safety mechanism, which dramatically increases safety. Even if the engine is not stopped and the safety lock lever 42 that shuts off the hydraulic pressure source of the operation lever is not in the locked state, the interference prevention means including the guide surface 26a and the console lifting handle 38 causes A malfunction of the operation lever 36 is prevented.

In this embodiment, the console raising handle 38 and the operating lever 36 are integrated via the console 28, but the present invention is not limited to such a configuration, and for example, the console raising handle 38 and the operating lever 36. And may be separated or stand type.

Further, in this embodiment, the console raising handle 38 is used as one of the interference preventing means for preventing the interference between the armrest 26 and the operating lever 36. 26
Anything may be used as long as it guides the vehicle in the escape direction away from the operation lever 36.

Further, instead of the guide surface 26a, a guide member that rotates integrally with the armrest 26 is provided on the armrest 26, and the guide member is brought into contact with an abutting member such as a console raising handle 38 so as to contact the armrest 26. May be guided in the escape direction away from the operation lever 36.

Furthermore, in the present embodiment, an example in which the operator seat system 15 is applied to a shovel machine has been described, but the present invention is not limited to this, and the operator seat system of the present invention is applied to various working machines such as construction machines. It goes without saying that you can do it.

[0036]

As described above, according to the operator seat system of the present invention, the armrest and the operating lever do not interfere with each other even when the seat back is pushed down.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a work machine to which an operator seat system of the present invention is applied.

FIG. 2 is a schematic configuration diagram of an operator seat system according to an embodiment of the present invention.

FIG. 3 is a plan view of FIG. 2;

FIG. 4 is a schematic view schematically showing the operation of the operator seat system of FIG.

FIG. 5 is a schematic diagram schematically showing the operation of a conventional operator seat system.

[Explanation of symbols]

15 ... Operator seat system, 22 ... Seat back, 26 ... Armrest, 26a ... Guide surface (contact guide surface), 36 ... Operating lever, 38 ... Console raising handle (contact member), 55 ... Operator seat.

Claims (5)

[Claims] 1. An operator seat having a seat back that can be laid down forward, an armrest rotatably attached to the seat back, and an operation lever installed near the operator seat and operated by an operator. In the operator seat system, the operator is provided with an interference prevention means for rotating the armrest when the seatback is tilted forward to prevent interference between the armrest and the operation lever. Seat system. 2. The contact preventing surface of the armrest contacts the operation lever by contacting the contact guide surface formed on the armrest side and the contact guide surface when the seat back is tilted forward. The operator seat system according to claim 1, wherein the operator seat system comprises an abutting member for preventing the above-mentioned problem. 3. The operator seat system according to claim 2, wherein the contact member is a console rotation lever that rotates a console provided with an operation lever. 4. The operator seat system according to claim 2, wherein the contact guide surface is formed on a lower surface of the armrest. 5. The operator seat system according to claim 2, wherein the contact guide surface is formed on a member that rotates together with the armrest.