JP2005002709A - Deadman switch of walking type snowplow - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To install a deadman switch in one of a plurality of operation levers arranged on an operation panel, separately from a deadman switch arranged in an operation handle part. <P>SOLUTION: This walking type snowplow has the operation handle 6 arranged in a rear part of a machine body, a plurality of operation levers arranged on the front side operation panel 7 of the operation handle 6, and the deadman switch 22 connected to an engine 4, and turned on and off by being gripped and released together with the operation handle 6. The deadman switch 23 is arranged in at least one of the operation levers, separately from the deadman switch 22. A hydraulic lever 14 is attached with the deadman switch 23 turned on and off by a press and a release of the press, and is provided with a finger-rest causing no fatigue, even if the deadman switch 23 is continuously operated over a long time. The hydraulic lever 14 is arranged in any of left or right side end part of the operation panel 7, and links the deadman switch 23 with the deadman switch 22 arranged in the operation handle part 6. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a walking snowplow in which a deadman switch is attached to one of a plurality of operation levers provided on an operation panel, separately from a deadman switch provided on a steering handle portion.
[0002]
[Prior art]
Conventionally, as shown in FIG. 4 and FIG. 5, a control handle C for operating the aircraft B at the rear of the aircraft B and a group of operation levers disposed on an operation panel D provided on the front side of the control handle C are provided. A walking snowplow A having E is well known. This snowplow A is equipped with an engine part F, a hydraulic device, etc. on a body B, and is driven by a transmission (transmission mechanism) G having a hydraulic continuously variable transmission (HST) below the body B behind the engine part F. Crawler travel device H. On the front side of the airframe B, a snow removal portion I capable of floating and rolling control, and snow that extends upward from the snow removal portion I and is scraped into the snow removal portion I by the upper and lower augers J and blown up by the blower K are cast. For this purpose, a snow throwing chute L that can change the snow throwing direction is provided, and the snow removal work is performed as the aircraft moves forward (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
JP-A-10-219642 [0004]
The operating lever group E includes a side clutch lever M for turning the aircraft to the left or right, a traveling clutch lever N for connecting / disconnecting the traveling clutch, and a continuously variable transmission lever O for switching forward / reverse, high speed / low speed continuously. In addition, a snow removing clutch lever P for turning on / off the power to the snow removing portion I, a hydraulic lever Q for tilting the snow removing portion auger up and down, left and right, a snow throwing lever R for adjusting the snow throwing distance, and other switches are provided. It has been. In addition, the emergency stop at the time of reverse operation that protrudes backward from the control handle C to stop the reverse of the aircraft in an emergency when the operator is caught between the control handle C and the rear obstacle at the time of reverse of the aircraft. A device S is provided. On the other hand, there is a known deadman clutch or deadman switch that stops the engine if the operator does not operate (hold) it with at least one hand. This deadman clutch or deadman switch stops the engine. It has become mandatory to establish.
[0005]
[Problems to be solved by the invention]
In the above conventional walking type snowplow, when a deadman switch (or deadman clutch) that is turned on / off by being grasped and released with the steering handle C is provided, one hand always has the deadman switch together with the steering handle C. It was held and restrained so as to be in the ON state, and it was impossible to simultaneously operate two operation levers of the operation lever group E. And if you operate the two control levers with both hands at the same time, the deadman switch will be activated and the snowplow will stop running, the snowplow auger will stop rotating, or the engine will stop, causing a snow clogging phenomenon. It will be. In some cases, the deadman switch that has been activated must be restored.
The present invention has been made to solve the above problems.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has the following configuration.
A. A steering handle for maneuvering the aircraft at the rear of the aircraft, a plurality of operation levers arranged on an operation panel provided on the front side of the steering handle, and connected to the engine, and gripped with the steering handle and released. In a walking snowplow having a deadman switch that is turned on and off, a deadman switch is provided on at least one of the operation levers separately from the deadman switch.
[0007]
B. A deadman switch was attached to the hydraulic lever among the operating levers.
C. A deadman switch that is turned on / off by pressing and releasing is attached to the hydraulic lever of the operating levers.
D. The hydraulic lever is disposed at either the left or right side end of the operation panel.
E. The hydraulic lever is provided with a finger hook for preventing fatigue even when the deadman switch is operated for a long time.
F. A deadman switch provided on the hydraulic lever and a deadman switch provided on the steering handle are linked.
[0008]
[Action]
A. above. ~ F. By having the configuration of (Claims 1 to 6), the deadman switch of the walking snowplow of the present invention operates as follows.
(1). In addition to the deadman switch provided on the control handle, at least one of the operating levers is provided with a deadman switch. Can be operated simultaneously. When the operating lever provided with the deadman switch is not operated, safety is ensured by turning on the deadman switch provided on the steering handle portion.
[0009]
(2). By attaching a deadman switch to the hydraulic lever of the operating lever, when the snowplow is performing snow removal work, the deadman switch is on while the hydraulic lever is being operated, and when the hydraulic lever is released, the deadman switch Turns off and stops the engine.
(3). By installing a deadman switch that is turned on and off by pressing and releasing the pressure on the hydraulic lever of the operating lever, when the snowplow is performing snow removal work, along with the operation of the hydraulic lever that is used frequently, other operating levers Can be operated simultaneously.
(4). By disposing the hydraulic lever at the left or right side edge of the panel, other operating levers can be operated without difficulty while operating the hydraulic lever that is used frequently.
(5). By providing the hydraulic lever with a finger hook that prevents fatigue even when the deadman switch is operated for a long time, the deadman switch can be kept on easily while operating the hydraulic lever that is used frequently.
(6). By linking the deadman switch provided on the hydraulic lever and the deadman switch provided on the steering handle, if one of the deadman switches is turned on, the snowplow does not stop.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the accompanying drawings.
1 and 2, reference numeral 1 denotes a walking type snowplow, and this snowplow 1 is equipped with a crawler traveling device 3 capable of turning a pair of left and right grounds or a superstrate on the lower side of the base 2. An engine unit 4 and a hydraulic device are mounted on the base 2, and a transmission (transmission mechanism) 5 including a hydraulic continuously variable transmission (HST) (not shown) is mounted on the lower part of the base 2 behind the engine unit 4. A bar-type steering handle 6 is provided on the upper side. A plurality of operation levers, which will be described later, are provided on an operation panel 7 provided on the front side of the steering handle 6. On the front side of the base 2, there is a snow removal portion 8 that can be controlled to float and roll, and snow that extends upward from the snow removal portion 8, is scraped into the snow removal portion 8 by an auger 9 and blown up by a blower 10. A snow throwing chute 11 that can change the snow throwing direction for throwing, and a shooter deflector 12 that is turned up and down to adjust the snow throwing angle are provided above the snow throwing chute 11. ,
[0011]
The rear left and right central part of the snow removal part 8 is supported by the left and right central part of the front end of the base 2 so as to be able to turn left and right, and power is transmitted from the base 2 side to the snow removal part 8 through the rotation support part. Part 8 is driven. A hydraulic cylinder 13 is interposed between the rotation support portion and the base 2 in the lateral direction, and the snow removal portion 8 and the snow throwing chute 11 are controlled to rotate left and right (rolling) by the expansion and contraction operation of the hydraulic cylinder 13. . The expansion / contraction operation of the hydraulic cylinder 13 is performed by switching the solenoid valve 14b shown in FIG. 3 via the operation arm 14a by a hydraulic lever 14 provided at the side end of the operation panel 7. In addition, the pitching operation of the snow removal unit 8 and the snow throwing chute 11 is also performed by the hydraulic lever 14.
[0012]
The expansion / contraction and free switching of the hydraulic cylinder 13 for rotating the snow removal section 8 left and right (rolling), and the expansion / contraction and free switching of the hydraulic cylinder (not shown) for controlling the pitching of the snow removal section 8 are automatically performed by an automatic / manual switching switch (not shown). And manual. And when rolling and pitching of the snow removal part 8 are switched to manual, the rolling and pitching of the snow removal part 8 are manually controlled by operating the hydraulic lever 14. Further, even when the rolling control of the snow removal unit 8 is in the automatic horizontal state, manual operation by the snow removal unit rolling control dial and the snow removal unit pitching control dial is possible, and when the manual operation is released, the snow removal unit 8 is brought into the automatic horizontal state. An automatic horizontal control device is provided that enables automatic horizontal control even when the snow removal unit 8 is restored and the rolling control of the snow removal unit 8 is controlled to be in an inclined state. These controls are all performed in conjunction with an electronic control circuit. Moreover, the hydraulic lever 14 has a function of controlling the pitching of the snow removal portion 8 when the snow removal portion 8 rolls to the left or right when tilted to the left or right and is rotated back and forth.
[0013]
The snow removing portion 8 supports the auger 9 horizontally in the auger housing 8a with the front open, and scrapes the snow that is opposed to the forward movement of the fuselage and moves it from the left and right sides toward the center. It blows upward by a blower 10 provided at the rear of the unit, and snow is thrown through a snow throwing chute 11 and a shooter deflector 12. Further, the snow throwing chute 11 rotates the chute rotating part horizontally to change the snow throwing direction to the left and right, and the vertical angle of the shooter deflector 12 is changed by the snow throwing angle adjusting cylinder to change the snow throwing angle / snow throwing. Adjust the distance. Grounding sleds 8b are provided at the left and right ends of the snow removal unit 8, and the snow removal unit 8 moves in a grounding or snowing state when rolling and pitching of the snow removal unit 8 are automatically or in a floating state.
[0014]
In addition to the hydraulic lever 14, the operation lever provided on the operation panel 7 includes a snow removal part clutch lever 15 for turning on / off the power to the snow removal part 8, and a speed change lever 16 for switching forward / reverse, high speed / low speed of the machine body. , A traveling clutch lever 17 for engaging / disengaging the traveling clutch, a side clutch lever 18 for engaging / disengaging the left and right side clutches, an accelerator lever 19 for adjusting the accelerator of the engine, the snow throwing direction and the shooter of the snow throwing chute 11 An adjustment chute switch 20 for adjusting the snow throwing angle of the deflector 12 is provided. The operation panel 7 is provided with various switches. An emergency stop device for reverse operation that protrudes backward from the steering handle 6 and stops the reverse of the aircraft in an emergency such that an operator is caught between the steering handle 6 and a rear obstacle (wall) when the aircraft is moving backward 21 is provided.
[0015]
Deadman switch that prevents the engine from stopping and removing snow if the operator does not hold it with one hand or press it from above (operating) with the handle of the handle 6 22 is provided. When the deadman switch 22 is released from the grip of the operator's hand or released, the deadman switch 22 is separated from the grip portion by the spring force of the spring, the engine is stopped, and the deadman switch 22 is gripped with the grip portion or pressed against the grip portion. In such a state, the engine maintains the driving state.
[0016]
In the present invention, a deadman switch is provided on at least one of the plurality of operation levers provided on the operation panel 7 separately from the deadman switch 22. In the embodiment shown in FIGS. 1 to 3, the hydraulic lever 14 is provided with a deadman switch 23 that is used as a grip for turning the limit switch 24 on and off by pressing and releasing the pressure. As shown in detail in FIG. 3, the hydraulic lever 14 is rotated back and forth and left and right to switch the solenoid valve 14 b via the operation arm 14 a and to control the pitching or rolling of the snow removal unit 8 via the hydraulic cylinder. To do. When the deadman switch 23 is pressed to the grip of the hydraulic lever 14, the limit switch 24 is turned on, the engine continues to rotate even when the deadman switch 22 is turned off, and when the release is released, the deadman switch 23 is moved by the return spring 26. Returning, the limit switch 24 is turned off, the rotation of the engine is stopped, and the snowplow 1 is stopped.
[0017]
The hydraulic lever 14 is disposed at the left or right side end of the operation panel 7. As a result, when the hydraulic lever 14 is operated with one hand and another operating lever is simultaneously operated with the other hand, it is convenient that they do not interfere with each other. The hydraulic lever 14 is provided with a finger hook 26 for preventing fatigue even if the deadman switch 23 is kept pressed for a long time. A limit switch 24 that is turned on and off by a deadman switch 23 provided on the hydraulic lever 14 and a limit switch (not shown) that is turned on and off by a deadman switch 22 provided on the steering handle 6 are an engine The diesel engine is connected in parallel and the gasoline engine is connected in series. If one of the deadman switches is on, the engine (snowblower) does not stop.
[0018]
In the self-propelled snowplow 1 having such a configuration, the deadman switch 22 is turned on with one hand together with the grip portion of the steering handle 6, and one of the operation levers is operated with the other hand. Alternatively, during the snow removal operation, without holding the grip portion of the steering handle 6 and the deadman switch 22, the hydraulic lever 14 is pressed with one hand so that the deadman switch 23 (limit switch 24) is turned on, and the finger hook Pitching or rolling of the snow removal unit 8 is controlled by placing the finger on the hand 26 and turning it to the front, back, left and right. Simultaneously with this operation, the other operation lever is grasped and operated by the other hand. The power from the engine unit 4 is transmitted to the transmission 5, the snow removal unit 8 and the like by various operations in the operation unit, and the two hydraulic cylinders, the chute rotating unit, the snow throwing angle adjusting cylinder and the like are controlled. The Then, the crawler 3 is driven to run the machine body, and snow removal / snow throwing work is performed by the snow removal unit 8, the snow throwing chute 11, and the shooter deflector 12 whose angle is adjusted. During such snow removal work, the airframe is traveling at a low speed, and the belief turn or the super belief turn is performed at a low speed.
[0019]
In the snow remover 1 of this embodiment, since the dead lever switch 23 is provided in the hydraulic lever 14 in addition to the dead man switch 22, the work can be performed with the dead man switch 23 turned on while the dead man switch 22 is turned off. it can. That is, the pitching or rolling of the snow removal unit 8 is controlled by turning the hydraulic lever 14 back and forth and right and left while turning on the deadman switch 23 with one hand. You can perform other operations by holding the lever. If a dangerous state occurs during snow removal work, the operator releases the gripping portion of the steering handle 6 and the deadman switch 22 or releases the hydraulic lever 14 and turns the deadman switch 23 on. By turning it off, the snowplow 1 can avoid danger by stopping the engine unit 4, stopping traveling, or stopping the driving of the snow removal unit 8.
[0020]
【The invention's effect】
As described above, according to the deadman switch of the walking type snowplow of the present invention, the following effects can be achieved by having the configuration of claims 1 to 6.
[0021]
(1). In addition to the deadman switch provided on the steering handle, at least one of the operation levers is provided with a deadman switch. One of the levers can be operated simultaneously. Further, when the operation lever provided with the deadman switch is not operated, safety can be ensured by turning on the deadman switch provided on the steering handle portion.
[0022]
(2). Since the deadman switch is attached to the hydraulic lever of the operating lever, when the snowplow is removing snow, the deadman switch is on while the hydraulic lever is being operated, and the deadman switch is released when the hydraulic lever is released. It can be turned off and the engine can be stopped.
(3). A deadman switch that is turned on and off by pressing and releasing the pressure is attached to the hydraulic lever of the operating lever, so when the snowplow is performing snow removal work, along with the frequently used hydraulic lever, other operating levers Can be operated simultaneously.
(4). Since the hydraulic levers are arranged at either the left or right side end of the panel, other operating levers can be operated simultaneously without difficulty while operating the hydraulic levers that are used frequently.
(5). Since the hydraulic lever is provided with a finger hook to prevent fatigue even if the deadman switch is operated for a long time, the deadman switch can be kept on easily while operating the hydraulic lever that is used frequently. .
(6). Since the deadman switch provided on the hydraulic lever is linked to the deadman switch provided on the steering handle, if one of the deadman switches is turned on, the snow removal operation can be continued without stopping the snowplow. Can be made.
[Brief description of the drawings]
FIG. 1 is a plan view of an entire snowplow according to the present invention.
FIG. 2 is a side view of the same.
FIG. 3 is a side sectional view of a hydraulic lever provided with a deadman switch.
FIG. 4 is a side view of the entire conventional snow remover.
FIG. 5 is a plan view of the same.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Self-propelled snow remover 2 Base 3 Crawler traveling device 4 Engine part 5 Transmission 6 Control handle 7 Operation panel 8 Snow part 8a Auger housing 8b Grounding sled 9 Auger 10 Blower 11 Snow throwing chute 12 Shutter deflector 13 Hydraulic cylinder 14 Hydraulic lever 14a Operation arm 14b Limit switch 15 Snow removal part clutch lever 16 Shift lever 17 Traveling clutch lever 18 Side clutch lever 19 Accelerator lever 20 Chute switch 21 Reverse stop emergency stop device 22, 23 Deadman switch 24 Limit switch 25 Return spring 26 Finger hook

Claims (6)

A steering handle for maneuvering the aircraft at the rear of the aircraft, a plurality of operation levers arranged on an operation panel provided on the front side of the steering handle, and connected to the engine, and gripped with the steering handle and released. In a walking snowplow having a deadman switch that is turned on and off,
In addition to the deadman switch, at least one of the operation levers is provided with a deadman switch. The deadman switch of the walking type snowplow according to claim 1, wherein a deadman switch is attached to a hydraulic lever of the operation levers. The deadman switch of the walking type snowplow according to claim 1 or 2, wherein a deadman switch that is turned on and off by pressing and releasing is attached to a hydraulic lever of the operation levers. The deadman switch of the walking type snowplow according to claim 1, 2 or 3, wherein the hydraulic lever is disposed at a left or right side end of the operation panel. The deadman switch of the walking type snowplow according to claim 1, 2, 3, or 4, wherein the hydraulic lever is provided with a finger hook for preventing fatigue even if the deadman switch is operated for a long time. 6. The deadman switch for a walk type snowplow according to claim 1, wherein a deadman switch provided on the hydraulic lever and a deadman switch provided on the steering handle are linked.

Images