JPH0762327B2 - Safety device for self-propelled snowplow - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention includes a blower device and a snow throwing shooter in a snow removing section of a machine body, and snow blown by an auger is blown by the blower device to the snow throwing shooter. TECHNICAL FIELD The present invention relates to a safety device for a self-propelled snow remover of a type in which the snow is jammed in a snow throwing shooter and a danger can be avoided when removing the snow clogging.

(B) Prior Art FIG. 5 is a schematic side view showing the overall configuration of a self-propelled snow remover of the above type. In such a self-propelled snow remover, the rotational power of the traveling engine 101 is generally transmitted to the traveling transmission 103 via the belt transmission device 102, and at the same time, the auger 105 and the blower device 106 are transmitted via another belt transmission device 104. Are transmitted to drive them to rotate. In this case, the belt transmission device 102 is interposed between the output shaft 107 of the traveling engine 101 and the input shaft 108 of the traveling transmission 103, and the belt transmission device 104 includes the output shaft 107 of the traveling engine 101 and the auger 105. Blower device 1
It is interposed between the common drive shaft 109 of 06. Further, a tension clutch (not shown) is attached to each of the belt transmissions 102 and 104 so that the transmission of the rotational power of the traveling engine 101 to the traveling transmission 103 or to the auger 105 and the blower device 106 can be disconnected. It has become. Therefore, if the tension clutch of the belt transmission device 102 is operated to the inward side while the traveling engine 101 is in the driving state, the rotational power of the traveling engine 101 is transmitted to the traveling transmission 103 via the belt transmission device 102 (the machine body). On the other hand, when the tension clutch is operated to the disengagement side, the transmission of the rotational power of the traveling engine 101 to the traveling transmission 103 is cut off (the machine body stops). Further, when the tension clutch of the belt transmission device 104 is operated to the entry side, the rotational power of the traveling engine 101 is transmitted to the auger 105 and the blower device 106 via the belt transmission device 104 (the auger 105 and the blower device 106 are rotationally driven). When the tension clutch is operated to the disengagement side, the transmission of the rotational power of the running engine 101 to the auger 105 and the blower device 106 is cut off (the auger 105 and the blower device 106 are stopped and non-snow removal is performed). Get ready).

(C) Problems to be Solved by the Invention In this type of snow remover, the snow pressure-fed from the blower device 106 is blocked in the snow-shooting shooter 110 during snow removal (due to snow quality, work speed, etc. ), The load (external load) of the blower device 106 increases when the snow jam occurs in the snow throwing shooter 110, and the belt of the belt transmission device 104 slips. There was a problem that 106 stopped and the snow removal function stopped. In such a case, the snow shooter 110
The snow trapped inside is manually removed to restore the snow removal function.At that time, the tension clutches of the belt transmissions 102 and 104 are conventionally operated to the disengagement side, and the traveling transmission 103, the auger 105, and the blower device The transmission of the rotational power of the running engine 1 is cut off, and then the snow throwing shooter.
I try to remove the snow stuck in 110. However, in the case of the conventional structure that requires the above procedure before performing the snow clogging removal work, since the blower device 106 is in the stopped state as described above when the snow is blocked in the snow throwing shooter 110, the belt transmission is stopped. It is often the case that the snow jammed in the snow throwing shooter 110 is removed while the tension clutch of the device 104 is not operated to the disengaged side but left to the disengaged side, which may cause an unexpected accident. was there. This is because the rotation power of the running engine 101 is being transmitted to the auger 105 and the blower device 106 with the tension clutch of the belt transmission device 104 kept on the entering side, so that snow clogging the snow shooter 110 is blocked. This is because the blower device 106 in the stopped state also returns to the rotating state when the external load is removed by removing the blocked snow.

Therefore, the present invention has been made in view of the above circumstances, and when snow clogging occurs in the snow throwing shooter, transmission of rotational power to the blower device is automatically stopped, and the stopped state is for snow throwing. It is an object of the present invention to provide a safety device for a self-propelled snow remover that ensures safety when removing snow clogging by preventing snow that has been jammed in the shooter from being released.

In addition, JP-A-58-42216, JP-A-58-50112, and JP-A-58-50113 disclose a technique for protecting a blower device or the like from an external load such as snow in a self-propelled snow remover. In addition, Japanese Utility Model Laid-Open No. 58-14031 discloses a technique for preventing the working device from being driven when the engine is started in a work vehicle. There is disclosed a technology for achieving safety when a user gets in and out of a mobile agricultural machine.

(D) Means for Solving the Problems In order to solve the above problems, the present invention provides an electromagnetic clutch in the power transmission path of the blower device and sets the on / off operation switch of the electromagnetic clutch to the blower device. The clutch is disengaged when an external load is applied to it and when it is manually operated, and the clutch is engaged only when it is manually operated.

(E) Action Therefore, when an external load such as snow acts on the blower device during snow removal work, the on / off operation switch will be in the clutch disengaged state and the electromagnetic clutch will be disengaged, so the rotational power of the running engine will be applied to the blower device. It is no longer transmitted and the blower system shuts down. The blower device remains stopped even if the external load is removed, and the clutch is turned on and off for the first time by manually operating the on / off operation switch. Can be done safely.

(F) Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a first diagram of a safety device for a self-propelled snow remover according to the present invention.
It is a schematic structure figure showing an example. In FIG. 1, reference numeral 1 denotes a traveling transmission, and the rotational power of a traveling engine 3 is transmitted to the traveling transmission 1 via a belt transmission device 2. Reference numeral 4 denotes an auger, 5 denotes a blower device, and the rotational power of the traveling engine 3 is transmitted to the auger 4 and the blower device 5 via a belt transmission device 6. Reference numeral 7 is a snow throwing shooter that integrally has a blower casing 8 at the bottom.

The belt transmission 2 includes a driving pulley 11 mounted on an output shaft 9 of a traveling engine 3 via an electromagnetic clutch 10, a driven pulley 13 mounted on an input shaft 12 of the traveling transmission 1, and these driving pulleys. It is composed of a driven pulley 13 and an endless belt 14 wound around the driven pulley 13. Therefore, in such a configuration, when the electromagnetic clutch 10 is in the engaged state, the belt transmission device 2 transmits the rotational power of the traveling engine 3 to the transmission 1.

The belt transmission device 6 includes a drive pulley 16 mounted on the output shaft 9 of the running engine 3 via an electromagnetic clutch 15, and a driven pulley mounted on a common drive shaft (blower shaft) 17 of the auger 4 and the blower device 5. Pulley 18 and these drive pulleys
16 and an endless belt 19 wound around a driven pulley 18. Therefore, in such a configuration, when the electromagnetic clutch 15 is in the engaged state, the belt transmission device 16 transmits the rotational power of the running engine 3 to the auger 4 and the blower device 5.

Basically, the on / off operation switches 20 and 21 of the electromagnetic clutches 10 and 15 are individually put into a clutch on state and a clutch off state by a manual operation, but a slip detection from a slip detector 22 attached to the electromagnetic clutch 15 is performed. When a signal is input, the two are interlocked with each other to automatically be in the clutch disengaged state.

In the self-propelled snow remover having such a configuration, if the on / off operation switch 20 is set to the clutch on state while the traveling engine 3 is being driven, the rotational power of the traveling engine 3 is changed to the electromagnetic clutch 10,
Transmission 1 for traveling via belt transmission 2
When the on / off operation switch 21 is turned on, the rotational power of the running engine 3 is transmitted via the electromagnetic clutch 15 and the belt transmission device 6 to the auger 4 and the blower device 5. Transmitted to the auger 4
And the blower device 5 is rotationally driven to perform snow removal work.

Thus, during such snow removal work, the snow that has been scraped up by the auger 4 and pressure-fed to the snow throwing shooter 7 by the blower device 5 is clogged in the snow throwing shooter 7, which is then blown by the blower device 5.
Acting as an external load on the electromagnetic clutch 15, rotational slippage occurs in the electromagnetic clutch 15. When this rotation slip is detected by the slip detector 22, the slip detection signal causes the on / off operation switches 20 and 21 to be in the clutch disengaged state, and as a result, the transmission 1 and the auger 4 for traveling of the rotational power of the traveling engine 3 and the blower device. Transmission to 5 is interrupted, the aircraft stops running, and rotation drive of the auger 4 and the blower device 5 is stopped. The stop state of the rotation drive of the blower device 5 is continued unless the on / off operation switch 21 is manually operated to bring the clutch into the on state. Therefore, the rotation drive is not performed by removing the external load. It is possible to safely perform the work of removing the snow clogged in the snow throwing shooter 7.

FIG. 2 shows a second embodiment of the present invention, in which rotation as a means for detecting an external load acting on the blower device 5 can be performed instead of the slip detector 22 so as to perform the same function. An example in which the detector 23 is adopted is shown. The rotation detector 23 is configured so that the contact A (not shown) closes when the blower shaft (driving shaft 17) of the blower device 5 becomes lower than the set rotation speed.
(Part) and the ON / OFF operation switches 20 and 21 are set to the clutch disengaged state by an operation signal when the A contact is closed. Therefore, when the snow sent under pressure by the blower device 5 is clogged in the snow throwing shooter 7 and acts on the blower device 5 as an external load, and the rotation speed of the blower device 5 becomes less than or equal to the set rotation speed, the rotation detector 23 It operates to put the on / off operation switches 20 and 21 in the clutch off state.

In the first and second embodiments, the electromagnetic clutch 10 is provided in the power transmission path of the traveling transmission 1, and the on / off operation switch 20 of the electromagnetic clutch 10 is provided in the power transmission path of the blower device 5. When the external load acts on the blower device 5 in conjunction with the on / off operation switch 21 of the clutch 15, the clutch is disengaged so that the machine body is stopped when the external load acts on the blower device 5. However, the running and stopping of the machine body may be separately performed by operating the tension clutch by providing the belt transmission device 2 with a tension clutch as in the conventional case. In particular, when the machine is driven and stopped by the tension clutch system in this way, if a warning device such as a buzzer or a lamp that is activated by a slip detection signal of the slip detector 22 or an operation signal of the rotation detector 23 is attached, There is an effect that the work of removing the snow stuck in the upper snow-shooting shooter 7, which serves as a guide for stopping the above, can be carried out at ease. The alarm means is stopped when the on / off operation switch 21 is put in the clutch on state again.

FIG. 3 and FIG. 4 show an example in which measures are taken to prevent snow clogging in the snow throwing shooter 7. Here, the electric heater 24 is wound around the outer peripheral surface of the blower casing 8 from the vicinity of the base of the snow throwing shooter 7 where snow clogging is likely to occur, and the electric heat heater 24 heats the snow throwing shooter 7 and the blower casing 8. This makes it difficult for snow to adhere to the inner wall. For example, if the electric heater 24 is designed to generate heat at the same time when the engine switch is started, the snow-shooting shooter 7 and the blower casing 8 can be sufficiently heated during snow removal to effectively prevent snow adhesion. Electric heater
The calorific value of 24 is adjusted to a predetermined temperature with a thermostat or the like in consideration of damage to the snow throwing shooter 7 and the blower casing 8 due to excessive heating and the safety of the operator. The means for heating the snow throwing shooter 7 and the blower casing 8 can be replaced by a hot water pipe or the like in addition to the electric heater 24.

(G) Effect of the Invention As described above, in the present invention, the blower device (5)
When an electromagnetic clutch (15) is provided in the power transmission path of the device, and an on / off operation switch (21) of the electromagnetic clutch (15) is applied to the blower device (5) by an external load or is manually operated. Since the clutch is disengaged and the clutch is engaged only when manually operated, when an external load such as snow acts on the blower device (5), the electromagnetic clutch (15) is turned on / off. )
Then, the blower device (5) is stopped, and the rotational drive of the blower device (5) is stopped. Therefore, the blower device (5), the belt transmission device and the like can be protected from external loads. And
This rotation drive of the blower device (5) continues to be stopped unless the on / off operation switch (21) is manually operated to put the clutch in the engaged state, so even an inexperienced worker can remove external loads such as snow. It has the advantage of being safe.

[Brief description of drawings]

FIG. 1 is a first diagram of a safety device for a self-propelled snow remover according to the present invention.
FIG. 2 is a schematic side view showing an embodiment, FIG. 2 is a schematic side view showing the second embodiment, FIG. 3 is a perspective view showing a snow throwing chute with measures for preventing snow jamming, and FIG. Cross section of the main part,
FIG. 5 is a schematic side view showing a conventional self-propelled snow remover. 4 ... Auger, 5 ... Blower device, 7 ... Snow throw shooter, 15 ... Electromagnetic clutch, 17 ... Drive shaft (blower shaft), 21 ... On / off operation switch, 22 ... Slipper detector,
23 …… Rotation detector.

Claims (3)

[Claims] A snow blower device (5) and a snow throwing shooter (7) are provided in a snow removing section of a machine body, and snow collected by an auger (4) is blown by the blower device (5) to the snow throwing shooter (7). ) Is a safety device for a self-propelled snowplow of a type in which the electromagnetic clutch (15) is provided in the power transmission path of the blower device (5), and the electromagnetic clutch (15) is turned on and off. The dressing switch (21) is in a clutch disengaged state when an external load acts on the blower device (5) or when manually operated, and is in a clutch engaged state only when manually operated. Safety device for self-propelled snowplow. 2. The on / off operation switch (21) is in a clutch disengaged state by a detection signal when a slip detector (22) attached to the electromagnetic clutch (15) detects a rotational slip of the electromagnetic clutch (15). The safety device for a self-propelled snow blower according to claim 1, wherein: 3. The on / off operation switch (21) is provided on the blower shaft (17) of the blower device (5).
Claim 1 is characterized in that the clutch is in a disengaged state by an operation signal of a rotation detector (23) attached to operate so as to close the contact when the rotation speed of 7) becomes equal to or less than a set rotation speed. The safety device for a self-propelled snow blower described in the paragraph.