JP4251401B2 - snowblower - Google Patents

Description

    The present invention has all fields related to snowplows as its technical field, and from the field of providing and selling equipment and tools necessary for the manufacture as well as the field of manufacturing snowplows. , Fields that provide materials, machinery, and parts necessary for materials, such as wood, stone, various fibers, plastics, various metal materials, etc., electronic components incorporated in them, and control-related equipment that integrates them Fields that are generally referred to as industrial machines, such as the field of various instruments, the field of various measuring instruments, the field of power machines that move the equipment, the equipment, the electric power that is the energy and the field of electricity and oil, , Testing and researching these facilities and equipment, fields related to their display, sales, import / export, general results, results of their use and operation of equipment and equipment to create them Collection of garbage waste that occurs I, field related to transportation, etc., recycling field to reuse them garbage waste efficiently, and to new areas that can not be assumed in the other the moment, it is enough not the technical field that are not related.

(point of view)
Widely used for general household use and business use, a walk-behind snowplow is equipped with an auger that collects snow on the ground in front of a self-propelled main body equipped with an endless track for driving on ice and snow and a driving source. And a shooter equipped with a blower that throws snow collected in a desired direction in the rear of the self-propelled main body, throttle lever, travel shift lever, side clutch, and chute / auger operation An operation panel provided with a lever and the like and a handle extended rearward from the left and right sides of the operation panel are arranged. Follow the rear side of the snowplow that is running, grab the handle while walking, adjust the rotation speed and running speed of the auger according to the depth and hardness of the snow in front, or adjust the direction of snow throwing etc. appropriately Like It is necessary to quickly operate each lever on the panel, and to operate the left and right turn of the snowplow, etc. Furthermore, when snow clogging occurs, it is necessary to scrape the clogged snow in the auger or chute For example, because it is used only in winter, it is often forced to perform unfamiliar and complicated work.

    For this reason, if an unexpected snow clog occurs, such as when snow removal work is performed during busy mornings and evenings, it will try to remove the snow clogged in the auger without stopping the drive source (generally the engine). I approached carelessly and got caught up, or I did reverse operation without checking the back well, accidentally stepped on and fell, and I was hit by a snow blower that went backwards unattended Since April 1, 2004, the Ministry of Economy, Trade and Industry is obliged to adopt a deadman clutch that automatically stops running and auger operation when the hand is released from the steering wheel. It became a thing.

    However, this newly mandated deadman clutch is assumed to make the driving operability of the conventional snow blower more complicated, and speed adjustment, direction change, and depth of snow are quickly and frequently expected. In many cases, it is impossible to control with one hand, such as changing the direction of snowfall or changing the direction of snow throwing, and it is necessary to operate by moving the hand away from the handle, and in each case, traveling stops or rotation of the auger stops When this happens, there is a concern that the workability will be greatly reduced, and that there will be a new drawback of becoming very inconvenient.

(Conventional technology)
In order to eliminate such adverse effects, for example, a deadman switch and other driving operation switches, which are disclosed in Japanese Patent Application Laid-Open No. 2004-100177, are provided at the grip portions of the operation levers such as the HST and the snow removal portion, so that a multi-function grip is obtained. The "snowplow" Fujii invention and the limit switch attached to the deadman switch and the limit attached to the clutch lever of the "Snowplow" Fujii invention and Japanese Patent Application Laid-Open No. 2004-68586, which can be operated simultaneously while continuously operating the deadman switch. By linking to the switch, when removing the deadman switch when the clutch lever is on during snow removal work or moving, the engine stops and avoids emergency hazards. The “Deadman Switch” Kobashi invention has already been developed.

    However, in the former Fujii invention “snowplow”, the deadman switch and other driving operation switches are concentrated on the grip of the control lever. It is necessary to perform operations such as pressing, and it is accurate and smooth while walking on snow and ice that is unstable and slippery with warm winter gloves on hands that are bitten in winter In order to operate properly, it requires considerable familiarity and caution, and the operation lever that is exposed outside without being equipped with a hood for snow protection or cold protection is provided on the grip part. Otherwise, snow or water droplets may enter the gaps between the various switches, causing the electrical system to short-circuit or freeze and become inoperable. Was achieved not afford to mean that less preferred as locations providing switch.

In addition, the latter Kobashi invention "Deadman switch of walking type snowplow" is not provided with a deadman switch at the handle grip provided near the operation panel, but also on any operation lever on the operation panel. It is necessary to provide a limit switch linked to the deadman switch, which has the disadvantage that the number of parts increases, and the structure in which the limit switch is provided in the grip portion of the operation lever is the same as in the former case There are concerns about deterioration of switch operability due to wearing gloves in the cold and troubles due to the ingress of moisture and snow into the switch. When the cover is integrated with the grip part, deterioration and breakage of the switch cover are inevitable due to repeated use over many years. It was only in some of the fear that similar problems will occur eventually.
(1) JP 2004-100177 A (2) JP 2004-68586 A

(Awareness of problems)
As described above, the present invention is a conventional "snowblower" invention or a "walking snowblower deadman switch" invention is a limit switch that is linked to a deadman switch or a deadman switch with respect to a grip portion of an operation lever. Because it is intended to detect the operation state by receiving the pressing force by the palm or fingertip when the operator grips the operation lever, it is difficult to perform delicate operations with thick gloves, In addition, the switch of the grip part exposed to the outside often causes operations that occur during snowfall or that the snow that is stuck in the auger must be removed and the operation must be resumed with hands that are entangled with snow. There are concerns about the occurrence of troubles due to the ingress of water droplets, which is not very desirable from the viewpoint of safety and durability, and there is a need to deal with them. It was.

(Object of invention)
Therefore, the present invention does not provide fine switches at the grip part, and even if it becomes a hand that is gripping and wearing a tentative thick glove, the operator does not place a burden on the operator lever as much as possible. It is assumed that it can be operated relatively easily, and that it is possible to provide a snow blower that is durable and safe by protecting the essential parts of the switch from the ingress of snow and water droplets. As a result of starting development and research and repeating trial and error over many years and many prototypes and experiments, this time, we finally succeeded in realizing a snowplow with a new structure. The configuration of the present invention will be described in detail together with an embodiment representing the present invention.

(Structure of the invention)
As clearly understood from the embodiments representing the present invention shown in the drawings, the snowplow of the present invention basically has the following configuration.
That is, a driving operation unit of a self-propelled vehicle body having a traveling mechanism and its drive source , and a snow removing mechanism by an auger and a shooter, which protrudes and forms on an operation panel disposed at a suitable place where the operator can easily operate. The top end of the travel shift lever that can be controlled to travel forward or backward at a speed approximately proportional to the tilt angle when the neutral position is stopped and the vehicle is tilted forward or backward beyond the neutral position. It is stretched and urged in the axial direction by the elastic function part at one of the lower end of the grip provided at the lower end of the grip, the middle part of the buttocks that is continuous below, a telescopic hydraulic, where the axis formed by providing an actuation end regulating portion capable of restricting the moving range in the direction of the telescopic mechanism is formed, which is regulated by the actuating end regulating portion of the telescopic mechanism In position within the moving range, a snowplow to subject matter that was made to constitute a deadman switch provided posture sensing unit that allows detecting the stretching operation state.

In other words, it is a driving operation unit of a self-propelled vehicle body having a traveling mechanism and its drive source , and a snow removing mechanism by an auger and a shooter. A travel that can be controlled to move forward or backward at a speed approximately proportional to the tilt angle when the vehicle is tilted and moved forward or backward beyond the neutral position. Extends in the axial direction by the elastic function part at one of the lower end of the grip provided at the top end of the shift lever, the midway part of the saddle that is continuous below it, or the appropriate part of the lower part of the saddle part. An expansion / contraction mechanism is provided that is provided with an operating end restricting portion that can be expanded and contracted while being energized and can restrict the movement range in the axial direction. The predetermined movement range position which is regulated Te, the posture sensing unit that allows detecting the telescopic operating state provided, attitude sensing unit, in the stretching operation posture of traveling shift lever itself, at least detect the stretched position instantaneously It can be said that it is a snowplow that is built into what is possible and constitutes a deadman switch.

In other words, it is a driving operation unit of a self-propelled vehicle body having a traveling mechanism and its drive source , and a snow removing mechanism by an auger and a shooter, and an operation panel arranged at an appropriate place where an operator can easily operate. Projected to the top, formed, stopped in a neutral position, and controlled to move forward or backward at a speed approximately proportional to the angle of inclination when operated to tilt forward or backward beyond the neutral position. In the center of the travel gearshift lever, either the lower end of the grip provided at the top end, the middle part of the saddle that is continuous below it, or the right part of the lower end of the saddle Forming an expansion / contraction mechanism provided with an operation end restricting portion that can be expanded and contracted while being stretched and can be moved in the axial direction, and the operation end restricting portion of the expansion / contraction mechanism Thus in place within regulated predetermined movement range, by which shall become constituting the deadman switch provided posture sensing unit that allows detecting the stretching operation state, the operator, your hand to grip the travel gear lever When the weight of the hand and the normal gripping and operating force are received, the elastic function unit is compressed, and when the posture detection unit detects the shortened state of the expansion / contraction mechanism, driving / shifting operation becomes possible. When the weight of the hand on the grip of the traveling speed change lever is removed or the hand is released from the grip, the elastically repelling function part is stretched and returned, and the posture sensing part detects the stretched state of the telescopic mechanism. This is a snowplow that automatically stops the auger.

The snow remover of the present invention up to the above will be shown as a more specific one. An operation unit for a self-propelled vehicle body having an endless track for running on ice and snow and its drive source , and also equipped with a snow removal mechanism by an auger and a shooter It is projected and formed on the operation panel placed at the appropriate place where it is easy for the operator to operate, and stops moving in the neutral position, and if it is tilted forward or backward beyond the neutral position, the tilt angle is adjusted. The lower part of the grip provided at the top end of the traveling speed change lever that can be controlled to travel forward or reverse at a substantially proportional speed, or the middle part of the saddle that is continuous below or the right part of the lower part of the collar In one of the above, the weight of the operator's hand attached to the grip, and the elastic functioning part that exerts an elastic force that can be easily compressed by normal gripping and operating force Thus, an expansion / contraction mechanism is provided with an operating end restricting portion that can be expanded and contracted while being stretched and biased in the axial direction and can control the movement range in the axial direction. Possible to be a snowplow with an endless track and an auger deadman switch provided with a posture sensing unit that can detect the expansion and contraction operating state at an appropriate place within the predetermined movement range regulated by the end regulating unit It is.

Similarly, the present invention is a driving operation unit of a self-propelled vehicle body having an endless track for driving on ice and snow and its drive source, and having a snow removal mechanism by an auger and a shooter, and is arranged at a place where the operator can easily operate. On the operation panel, a deadman switch button for switching the start and stop of the auger is provided, protruding and formed to an appropriate position on the operation panel, stopping the progress in a neutral posture, either forward or backward beyond the neutral position The lower end of the grip provided at the top end of the traveling speed change lever that can be controlled to move forward or backward at a speed approximately proportional to the inclination angle when the tilt movement operation is performed, Easy compression with the weight of the operator's hand attached to the grip, as well as normal gripping and operating force, at one of the appropriate locations on the lower end of the buttock It is provided with an operating end restricting portion that can be expanded and contracted while being stretched and biased in the axial direction by a resilient and repellent function portion that exhibits a certain degree of elasticity, and that can control the range of movement in the axial direction. A telescopic mechanism is formed, and an endless track and auger deadman switch are configured by providing an attitude sensing unit capable of detecting the telescopic operating state at an appropriate position within a predetermined movement range regulated by the operating end regulating unit of the telescopic mechanism. It is a snow remover.

The snow remover according to the present invention has an endless track for running on ice and snow and a driving source thereof, and is a driving operation unit for a self-propelled vehicle body provided with a snow removing mechanism using an auger and a shooter, and is easy for an operator to operate. Projected and formed on the operation panel placed at the appropriate location, stops traveling in a neutral position, and if it is tilted forward or backward beyond the neutral position, it moves forward or reverse at a speed approximately proportional to the tilt angle To the grip, either at the lower end of the grip provided at the top of the traveling speed change lever that can be controlled to travel, or at the midpoint of the saddle that is continuous below it, or at the appropriate position on the lower end of the buttocks The weight of the attached operator's hand, as well as normal gripping and stretching, was urged in the axial direction by an elastic function that exerts an elastic force that can be easily compressed by operating force. A freely or stretching operation to form the stretch mechanism formed by providing an actuation end regulating portion capable of restricting the movement range to its axial direction, within a predetermined range of movement is restricted by the working end regulating portion of the telescopic mechanism At the right place, a posture sensing unit that can detect the expansion and contraction operation state is provided to configure an endless track and a dead man switch for the auger, and to the left and right independent type handle that extends backward from the right and left sides of the driving operation unit. Left and right independent of each other, or integrated with the left and right loop-type handles extending rearward from the right and left sides of the operating unit. And snow removal with a deadman switch that secures the start state of the auger and provides an endless track and emergency stop when the hand is released from the handle. There are included.

    According to the snowplow of the present invention having the above-described configuration, even when the operator wears thick gloves and grips the traveling shift lever and steers it, as in snow removal work during snowfall in the severe winter season, This eliminates the need for detailed operations that would otherwise be possible without the use of a fingertip, and easily compresses the elastic function by the weight of the hand holding the traveling speed change lever and operates the telescopic mechanism. The characteristic configuration makes it possible to automatically activate the deadman switch in the middle, and the operator can perform the operation almost the same as the conventional one, and the deadman switch can be reliably operated without being aware of its existence. Because it can be operated, it does not deteriorate the operability of the snowplow like the conventional Deadman switch, and the grip surface Since there is no need for a switch button at the exposed location such as minutes, it is possible to reliably prevent troubles due to intrusion of ice and snow, water drops, etc. The excellent feature that it is possible to obtain a high safety that is not comparable to that of the product will be exhibited.

In implementing the present invention having the configuration as described above, the best or desirable mode will be described.
The self-propelled vehicle body forms the main body of the self-propelled snowplow, and it drives the traveling mechanism with the driving force from the drive source mounted in the appropriate place, and it moves forward, backward, forward and backward, and turns right and left. Is equipped with a suitable snow removal mechanism at the right place and fulfills the function of allowing self-propelled and snow removal, boarding with a driving operation part at the right place, or walking on the rear side of the run, The operator to be followed must have a structure that allows it to be properly steered.

The traveling mechanism receives the output from the drive source , and makes the self-propelled vehicle body self-propelled at a speed and direction suitable for the snow removal at the speed desired by the operator, and immediately when necessary. Must be able to run on snow and ice stably and reliably, and must be able to reliably transmit braking force from the brake onto the snow and ice surface. A synthetic resin or metal crawler was attached to the left and right wheels, which consist of multiple wheels, such as those that have been adopted for some time It shall consist of an endless orbit.

The drive source outputs the driving force to the traveling mechanism, fulfills the function of transmitting and supplying the driving force to the snow removal mechanism according to the structural need, and the self-propelled vehicle on snow or ice When the driving force is such that it can be driven with sufficient driving force, and when output to the snow removal mechanism as required, sufficient driving force is applied to both the traveling mechanism and the snow removal mechanism. More specifically, it is desirable to employ various engines including diesel engines, gasoline engines, etc., motors driven by power supply from batteries, etc. The engine supplies power to both the travel mechanism and the snow removal mechanism, the engine supplies power to the travel mechanism, and the motor supplies power to the snow removal machine. It is possible to supply a driving force to both the traveling mechanism and the snow removal mechanism, and more specifically, the engine serves as a drive source for the traveling mechanism and the snow removal mechanism auger, and the motor is used as a shooter for the snow removal mechanism. It is also possible to use as a drive source for the blower.

    The snow removal mechanism collects the snow that has approached the appropriate place of the traveling self-running vehicle body one after another, throws it in the direction and distance desired by the operator, or blows it away to remove the snow, more specifically, An auger mounted in a suitable position on the front side of the vehicle body that can come into contact with snow, preferably in a suitable position on the front side in the running direction, and a blower that blows away the snow collected by the auger upward on either the left or right side It can be said that it has an attached shooter.

    The driving operation unit allows the driving mechanism and snow removal mechanism provided on the self-running vehicle body to be operated and operated as desired by the operator, and further prevents operator error and ensures safety. It should be equipped with an operation panel that can be operated by each operator, and a handle provided in the vicinity thereof. A deadman switch must be provided at least at an appropriate position of the traveling speed change lever provided on the operation panel.

The operation panel starts and stops the drive source of the self-propelled vehicle body and controls the rotation speed, switching steering between the front and rear and left and right of the traveling mechanism, starting and stopping the auger and blower of the snow removal mechanism, control of the driving speed, posture of the auger and shooter Functions that enable a series of controls including control etc. by operator input, and should be provided with appropriate levers and buttons according to the input and operability required for each. It is desirable that various warning lights, meters, monitors, etc. are arranged as necessary, and that the function description is displayed in characters or symbols on each input / output part, and it is attached to the traveling speed change lever. In addition, an independently operable deadman switch can be provided in place.

    The traveling speed change lever is provided in a projecting manner at an appropriate position on the operation panel to enable traveling operation of the traveling mechanism, and the operator continuously inputs the operation during the substantial snow removal work by the snow removal machine. When the operator releases the hand, it has the property that the snow removal work is not substantially performed, and fulfills the function of allowing attachment of the most important deadman switch in the present invention. Snow removal is possible only when the operator is holding the travel speed change lever, and when the operator releases his hand from the travel speed change lever, the deadman switch is activated instantly, and both the travel mechanism and the snow removal mechanism are urgently stopped. In the neutral position, the traveling mechanism stops its progress, and if it is tilted forward or backward beyond the neutral position, It can be made controllable to forward travel or backward travel at a speed substantially proportional to the inclination angle.

The deadman switch enables the normal operation by enabling the input from the traveling gearshift lever while the operator grabs the traveling gearshift lever and performing the traveling operation. Immediately after releasing the hand, it functions to substantially stop both the traveling mechanism and the snow removal mechanism, and during operation, the driving source of the traveling mechanism and the snow removal mechanism is instantaneously stopped. Or it can be a deadman clutch that cuts before the output from the drive source is transmitted to the running mechanism and the snow removal mechanism, both functions of stopping the drive source and cutting the transmission of the driving force It is also possible to exhibit at the same time.

    In consideration of the functionality of the deadman switch, either the lower end of the grip provided at the top end of the traveling shift lever, the midway part of the saddle that is continuous below it, or the appropriate part of the lower part of the saddle part is suitable. For example, an operating end that can be expanded and contracted while being stretched and biased in the axial direction by the elastically repellent function part and can regulate the movement range in the axial direction. An expansion / contraction mechanism provided with a restriction portion is formed, and a posture detection portion that can detect the expansion / contraction operation state is provided at an appropriate position between the parts restricted and separated by the operation end restriction portion of the expansion / contraction mechanism. it can.

    When the operator grips the grip of the travel speed change lever, the grip mechanism slightly descends and shortens due to the weight of the operator's hand and the input of the operation, and the deadman switch causes the posture detection unit to When the operator releases the grip, the resilience function part exerts resilience and raises the grip to a predetermined position. The deadman switch serves to recognize the extended state of the travel shift lever by its posture sensing unit, and is a telescopic slide at an appropriate position near the upper end, midway, or lower end of the lower grip of the grip. The operation end restricting part that can restrict the range of expansion and contraction, and the stretched state while the operator is not touching the grip, It is desirable to those having an input Therefore relatively easily compressible Tamabachi function unit weighs about other hand.

    More specifically, it is provided at an appropriate position in the middle of the buttock below the operation panel of the travel shift lever, and is a tubular outer casing that is integrally suspended from the lower end of the grip, and is concentrically accommodated therein, and the upper end is brought into contact therewith. The compression coil spring and the distal end of the heel base end are inserted from the tubular outer sheath basal end, and are connected to the grip lower end through the center of the compression coil spring so as to be vertically slidable and extendable. An annular seating surface that receives the lower end of the compression coil spring is formed to form an elastically repellent functional portion, and a long hole having a predetermined length parallel to the axial center is drilled in the thickness direction at an appropriate position on the lower side of the tubular outer casing. Restricted to be vertically slidable within a predetermined range by projecting an orthogonal engagement sliding pin on the shaft center at an appropriate position corresponding to the elongated hole, below the annular seating surface at the end. It is possible to form a working end restricting portion.

    The repelling function part raises the upper part of the telescopic mechanism including the grip of the traveling speed change lever to ensure its stretched state elastically, and when the operator grips the grip, The telescopic mechanism is compressed relatively easily by the input and performs the function of exerting the resilience to such a degree that the grip is slightly lowered. A magnetic component or electromagnet including a spring component provided on the surface, a rubber or soft synthetic resin elastic component, or a permanent magnet with opposed magnetic poles facing each other, or a compressible gas sealed in a sealed manner Any combination of a cylinder and a piston can be used as long as it can exhibit a desired resilience function or a substantially equivalent function.

    The operating end restricting portion restricts the end of the expansion / contraction operation of the expansion / contraction mechanism, enables the operation end of the shortening posture and the extending posture to be restricted, and unnecessary extension and It must function to prevent shortening operation, ensure a comfortable operation feeling, and be able to regulate with a strength that does not inadvertently disengage, and travel shifting between parts separated by a telescopic mechanism In the axial direction of the lever collar, it is possible to adopt a guide structure that allows sliding movement for a short distance, or a locking structure that engages only at the end in the expansion / contraction direction. It should be disassembled and assembled.

    The posture sensing unit functions to enable the deadman switch to operate quickly by instantly recognizing whether the travel gear lever's telescopic mechanism is in a shortened posture or an extended posture. It is arranged facing the parts separated by the mechanism, either detecting the expansion / contraction state of the expansion / contraction mechanism sequentially, recognizing the state only when shortened or recognizing the state only when stretched However, due to the nature of the deadman switch attached to the travel speed change lever, it is desirable to be able to detect the extension posture of the telescopic mechanism instantaneously, more specifically. A limit sensor, a touch sensor, an infrared sensor, an optical sensor, or the like can be employed.

Deadman switch button, when the operator operates the buttons on the operation panel, activation of the auger, be those functions that can execute the operation switching of the stop, the clutch function or between the auger and the drive source It is possible to cut off the output from the drive source during operation and cut off the output from the drive source during the operation, or to stop the auger drive source itself in an emergency. It is desirable to use a button that is large enough to enter the eye and that can be operated instantaneously, and that is colored or emits light in a relatively conspicuous color.

The handle part deadman switch detects that the operator is grasping the handle located near the operation panel of the snowplow, and when the operator releases the handle, It should fulfill an emergency stop function and should cut power transmission between the drive source and the travel mechanism and the snow removal mechanism, or should stop the drive source itself in an emergency manner. It can be suitably used for a walking type snowplow that follows a rear side while an operator walks and steers the operation panel as appropriate to perform snow removal work. For example, it is extended rearward from an appropriate position on the left and right sides of the driving operation unit. Either left and right independent of the left and right independent handles, or left and right integrally with the loop type handle extending backward from the right and left sides of the driving operation unit. , It can be assumed that by ensuring the activation state of the traveling mechanism and snow removal mechanism by the handle gripping by the right or left hand of the operator, an emergency stop and the traveling mechanism and snow removal mechanism Release the handle.
In the following, the structure of the present invention will be described in detail together with an embodiment representative of the present invention shown in the drawings.

FIG. 1 is a front view of the traveling transmission lever in the extended state, FIG. 2 is a front view of the traveling transmission lever in the shortened state, FIG. 3 is a perspective view of the snowplow, and FIG. 4 is a perspective view of the driving operation unit. The example has a traveling mechanism 11 and its drive source, and an operation panel 31 is arranged at an appropriate position of the driving operation unit 3 of the self-propelled vehicle body 1 provided with the snow removal mechanism 2. Forming an expansion / contraction mechanism 6 provided with an operating end regulating portion 63 that is stretched and biased by the elastically repellent function portion 61 and can be freely expanded and contracted, and that can regulate the movement range, is formed at an appropriate midway position of the lever 4 A typical embodiment of a snowplow included in the present invention, in which a deadman switch 5 is configured by providing a posture sensing unit 7 at an appropriate position between parts separated by an expansion / contraction mechanism 6, is shown.

As shown in FIG. 3, the snowplow includes a traveling mechanism 11 having an infinite start with a rubber crawler, and a rotary type at the front of a self-propelled vehicle body 1 including a drive source ( not shown) that is a diesel engine. The auger 21 and a snow removal mechanism 2 having a shooter 22 with a blower (not shown) extending upward from the rear thereof are provided, and an operation panel 31 and a handle 35, The driving operation unit 3 having 35 is provided.

    As shown in FIG. 4, a throttle lever 32, a travel speed change lever 4, a deadman switch button 8 for the snow removal mechanism 2, a side clutch 33, and a chute / auger operation lever 34 are appropriately arranged on the operation panel 31 from the left side. As shown in FIGS. 1 and 2, the traveling speed change lever 4 is formed with a deadman switch 5 in the middle part of the base 41 on the bottom side of the flange 41 which is hidden under the operation panel 31, and is input and operated by the operator. Unless there is, the neutral position is maintained, and when the operator releases his hand, the neutral posture is automatically restored immediately, and the traveling mechanism 11 stops in the neutral posture and overcomes the neutral posture. When a forward tilt operation is performed, the vehicle moves forward at a speed approximately proportional to the forward tilt angle. It has become a thing to be.

    The deadman switch 5 has a compression coil spring 62 concentrically accommodated in a tubular outer casing 42 that is integrally suspended from the lower end of the grip 45 of the traveling speed change lever 4, and has its upper end abutted immediately below the grip 45. On the other hand, the distal end of the flange base end portion 43 whose base end side is connected to a transmission (not shown) for the travel mechanism 11 is inserted from the proximal end opening of the tubular exterior rod 42 and penetrates through the center of the compression coil spring 62. Then, it is connected to the vicinity of the lower end of the grip 45 so as to be vertically slidable and expandable, and the tubular outer casing 42 and the flange base end portion 43 are arranged in the same axial center. An annular seating surface 44 that receives the lower end of the compression coil spring 62 is formed on the outer peripheral surface of the appropriate place to form the elastically repellent functional portion 61, and a predetermined length parallel to the axis is provided at an appropriate lower side of the tubular outer casing 42. Dimensionally long hole 64 in thickness direction By engaging the engagement sliding pin 65 with a shaft orthogonal to the axial center at an appropriate position corresponding to the long hole 64 below the annular seating surface 44 of the flange base end portion 43 from the outside. The telescopic mechanism 6 is formed by forming a projecting shape and forming an operating end regulating portion 63 that regulates sliding movement between a predetermined vertical range.

    A mounting tongue piece protrudes from an appropriate position on the outer peripheral surface near the lower end of the tubular outer casing 42 that forms a part of the expansion / contraction mechanism 6, and a contact 71 that is a combination of a bolt and a nut is provided to the tubular outer casing 42. A limit sensor 72 that can sense the mechanical contact of the contact 71 is attached to a bolt at an appropriate position on the outer peripheral surface near the upper end of the flange base end 43 corresponding to the contact 71. When the limit sensor 72 senses the contact of the contact 71, it recognizes the operator's operation and input state, or the contact sensor 71 is connected. When the separation is detected, the function of the control switch for the deadman switch 5 is achieved as a recognition of the absence of the operator.

    The posture detection unit 7 is mounted such that a detected portion 71 made of a bolt and a nut that imparts magnetism to the mounting tongue piece is parallel to the axial center of the tubular outer casing 42, and the base end corresponding thereto It is possible to obtain substantially the same operation as the combination of the contactor 71 and the limit sensor 72 by bolting the magnetic detection part 72 at an appropriate position on the outer peripheral surface near the upper end of the part 43. It is also possible to employ an external switch mechanism that can be operated.

    Furthermore, as shown in the perspective view of the modified example of the driving operation unit in FIG. 5, each of the left and right independent handles 35, 35 has a control circuit different from that of the traveling shift lever 4 and has a control unit deadman switch. 9 and 9, and if the operator does not grasp at least one of the left and right handle part deadman switches 9 together with the handle 35, neither the traveling mechanism 11 nor the snow removal mechanism 2 operates, and the hand is released from the handle part deadman switch 9. The traveling mechanism 11 and the snow removal mechanism 2 can be operated so as to make an emergency stop, and when the handle 35 is a loop type, the driving operation unit shown in FIG. Thus, the handle part deadman switch 9 is arranged and formed along the inside of the loop type handle 35, and the operator uses at least one of the left and right hands to make the loop type. With bundle 35, the handle portion deadman switch 9, it is possible to those configured for gripping.

The deadman switch 5, the deadman switch button 8, and the handle part deadman switch 9 are intended to stop the driving source of the traveling mechanism 11 and the snow removal mechanism unit 2 in an emergency, and the power of the traveling mechanism 11 and the snow removal mechanism unit 2 and the driving source. It is possible to use a deadman clutch that disconnects the transmission device.

(Operation of Example)
The snow remover of the present invention having the above-described configuration is shown in FIGS. 1 to 4 when an unillustrated operator is arranged at the rear of the driving operation unit 3 shown in FIG. 3 when starting snow removal work. When the traveling speed change lever 4 is gripped, the traveling speed change lever 4 in the neutral position receives the weight of the operator's hand on the grip 45, and the compression coil spring 62 of the elastic functioning portion 61 is compressed, so that the telescopic mechanism 6 is shown in FIG. As shown by the white arrow in FIG. 2, the position is shortened within the restriction range of the operating end restricting portion 63, and the posture sensor 7 detects the contact of the contact 71 by the limit sensor 72, and the deadman switch 5 , It recognizes that the operator is operating normally. In this state, it becomes possible to start the diesel engine as a drive source . If the limit sensor 72 does not detect the contact 71, the deadman switch 5 does not hold the traveling shift lever 4 and the driver operates normally. It is determined that the drive source is not operated, and the drive source is controlled so as not to be activated.

When the operator who activated the drive source tilts the travel shift lever 4 forward beyond the neutral posture, the travel mechanism 11 moves forward at a speed substantially proportional to the tilt angle of the travel shift lever 4 and travels. When the shift lever 4 is tilted backward beyond the neutral posture, the vehicle moves backward at a speed substantially proportional to the tilt angle of the travel shift lever 4, and when the shift lever 4 is returned to the neutral posture, the travel mechanism 11 is controlled to stop. .

    As shown in FIGS. 3 and 4, when the operator operates the chute / auger operating lever 34, the auger 21 of the snow removal mechanism 2 rotates, and the number of rotations is adjusted by the throttle lever 32, so It is possible to adjust so that snow can be removed smoothly. During snow removal work, the traveling gear shift lever 4 controls the traveling, and when moving forward and backward, the side clutch 33 is used together. It is necessary to change and adjust the depth of snow removal and the snow throwing direction with the chute / auger operating lever 34 according to the snow removal location.

While the snow removal work is proceeding, the operator can move from the traveling shift lever 4 for any reason, such as when an emergency occurs, an obstacle is removed, or the auger 21 or the shooter 22 is clogged with snow. Is released, the restoring force of the compression coil spring 62 of the elastically repellent function part 61 is released, and the expansion / contraction mechanism 6 is stretched and returned in the direction of the white arrow shown in FIG. Then, the contact 71 of the posture sensing unit 7 is detached from the limit sensor 72, and the deadman switch 5 recognizes that the operator has left the driving operation unit 3, and urgently stops the driving sources of the traveling mechanism 11 and the snow removal mechanism 2. Accordingly, the traveling speed change lever 4 automatically returns to the neutral posture. Therefore, when the snow removal work is started again, the same operation as the above-described starting procedure is performed. It made.

Further, when the operator depresses the deadman switch button 8 in FIG. 4 during the snow removal work, the snow removal mechanism 2 such as the blower of the auger 21 and the shooter 22 is disconnected from the drive source , and the emergency removal is stopped. When restarting, it is necessary to press the deadman switch button 8 again to reconnect the output from the drive source to the snow removal mechanism 2.

Furthermore, as shown in FIG. 5, when the left and right independent handles 35, 35 are provided with the driving operation unit 3 provided with the handle part deadman switches 9, 9, the traveling speed change lever in the neutral position is used. After gripping 4 and activating the drive source , the corresponding handle 35 and handle part deadman switch 9 are gripped by either one of the left and right hands before the advance operation, and the deadman switch of the travel shift lever 4 is 5 or when the handle part deadman switches 9 and 9 are both released, the travel mechanism 11 and the snow removal mechanism 2 are stopped immediately, as shown in FIG. As shown, even when the handle portion deadman switch 9 is provided for the loop type handle 35, the starting operation is performed in the same manner as that described above, and the travel shift lever 4 is released. Or release the hand from the man switch 5, or when either release the hand from the handle portion deadman switch 9, and that an emergency stop traveling mechanism 11 and snow removing mechanism 2.

When the deadman switch 5, the deadman switch button 8 and the handle portion deadman switch 9 are used as a deadman clutch that separates the power transmission device between the travel mechanism 11 and the snow removal mechanism 2 and the drive source , the deadman clutch is activated and the travel mechanism 11 and When the snow removal operation is resumed after the snow removal mechanism 2 has stopped urgently, the drive source continues to operate, so there is no need to restart the drive source such as a diesel engine, and the snow removal operation is resumed quickly. It becomes possible to do.

(Effect of Example)
In addition to the features described in the section of the effect of the present invention, the snowplow according to the embodiment having the above-described configuration includes, as shown in FIG. 1 and FIG. By attaching the compression coil spring 62 between the base end portion 43 and the elastically repellent functional portion 61, and using the operating end regulating portion 63 that is a combination of the long hole 64 and the engagement sliding pin 65, Forming a deadman switch 5 that is mechanical and capable of ensuring an accurate expansion / contraction operation, and that uses the contact 71 and the limit sensor 72 for the attitude detection unit 7 and has few malfunctions and excellent reliability. Can do.

    Also, as shown in FIG. 4, the auger 21 of the snow removal mechanism 2 and the blower of the shooter 22 can be stopped immediately by the operator by means of the deadman switch button 8 arranged at an appropriate position on the operation panel 31. In addition, as shown in FIG. 5 or FIG. 6, the provision of the handle portion deadman switch 9 for the handle 35 has the advantage of being able to ensure a much higher level of safety. Will be obtained.

Furthermore, after the deadman switch 5, the deadman switch button 8 and the handle portion deadman switch 9 are deadman clutches, the travel mechanism 11 and the snow removal mechanism 2 are brought to an emergency stop by the operation of each deadman switch 5, 8, 9; When the snow removal work is restarted, it is not necessary to restart the drive source , so that the safety of the snow removal work can be ensured and the work efficiency can be significantly improved.

(Conclusion)
As described above, the snowplow of the present invention can achieve the intended purpose evenly by its new configuration, is easy to manufacture, and maintains the basic structure of the conventional snowplow. However, since it can be adopted without significant design changes, it is possible to attach a deadman switch to a wide range of models without newly designing a new snowplow to install the deadman switch. It can be manufactured much more economically than a conventional deadman switch without increasing the number of points, so it can be offered to the market at a relatively low price. It is expected that it will be widely used and popularized by various industries involved in the manufacture and sale of snowplows, as well as customers who wish to achieve compatibility.

The drawings show typical embodiments embodying the technical idea of the snowplow of the present invention.
It is a front view which shows the traveling shift lever provided with the deadman switch. It is a front view which shows the traveling speed-change lever in a shortened state. It is a perspective view which shows a snowblower. It is a perspective view which shows a driving | operation operation part. It is a perspective view which shows the modification of a driving | operation operation part. It is a perspective view which shows the modification outside a driving | operation operation part.

Explanation of symbols

1 Self-propelled body
11 Same traveling mechanism 2 Snow removal mechanism
21 The Ogre
22 Suta 3 Operation section
31 Same operation panel
32 Throttle lever
33 Same side clutch
34 Same chute / auger control lever
35 Same handle 4 Traveling lever
41
42 Tubular armor
43 Same base end
44 Same ring bearing surface
45 Same grip 5 Deadman switch 6 Telescopic mechanism
61 Same impact function
62 Same compression coil spring
63 Same operating end restriction
64 Same hole
65 Same engaging sliding pin 7 Posture sensing part
71 Same contact (detected part)
72 Same limit sensor (magnetic detection part)
8 Deadman switch button 9 Handle section deadman switch

Claims (7)

A driving operation unit of a self-propelled vehicle body having a traveling mechanism and its drive source , and a snow removing mechanism by an auger and a shooter, which protrudes and is formed on an operation panel arranged at a suitable place where the operator can easily operate, Provided at the top end of the travel speed change lever that can be controlled to stop traveling in a neutral position and tilt forward or backward beyond the neutral position to move forward or backward at a speed approximately proportional to the tilt angle. Extending or contracting while being stretched and biased in the axial direction by the elastic function part at one of the lower end of the grip, the midway part of the buttock that is continuous below it, or the right part of the lower part of the buttock a freely to form a telescopic mechanism formed by providing an actuation end regulating portion capable of restricting the movement range to its axial direction, a predetermined movement is restricted by the working end regulating portion of the telescopic mechanism The 囲内 place, snowplow, characterized in that shall become constituting the deadman switch provided posture sensing unit that allows detecting the stretching operation state. A driving operation unit of a self-propelled vehicle body having a traveling mechanism and its drive source , and a snow removing mechanism by an auger and a shooter, which protrudes and is formed on an operation panel arranged at a suitable place where the operator can easily operate, Provided at the top end of the travel speed change lever that can be controlled to stop traveling in a neutral position and tilt forward or backward beyond the neutral position to move forward or backward at a speed approximately proportional to the tilt angle. Extending or contracting while being stretched and biased in the axial direction by the elastic function part at one of the lower end of the grip, the midway part of the buttock that is continuous below it, or the right part of the lower part of the buttock a freely to form a telescopic mechanism formed by providing an actuation end regulating portion capable of restricting the movement range to its axial direction, a predetermined movement is restricted by the working end regulating portion of the telescopic mechanism The 囲内 place, the attitude sensing unit that allows detecting the telescopic operating state provided, attitude sensing unit, in the stretching operation posture of traveling shift lever itself, incorporated into those detectable instantly at least that stretch orientation A snowplow characterized by comprising a deadman switch. A driving operation unit of a self-propelled vehicle body having a traveling mechanism and its drive source , and a snow removing mechanism by an auger and a shooter, which protrudes and is formed on an operation panel arranged at a suitable place where the operator can easily operate, Provided at the top end of the travel speed change lever that can be controlled to stop traveling in a neutral position and tilt forward or backward beyond the neutral position to move forward or backward at a speed approximately proportional to the tilt angle. Extending or contracting while being stretched and biased in the axial direction by the elastic function part at one of the lower end of the grip, the midway part of the buttock that is continuous below it, or the right part of the lower part of the buttock a freely to form a telescopic mechanism formed by providing an actuation end regulating portion capable of restricting the movement range to its axial direction, a predetermined movement is restricted by the working end regulating portion of the telescopic mechanism The 囲内 place, by which shall become constituting the deadman switch provided posture sensing unit that allows detecting the stretching operation state, the operator, when your hand to grip the traveling shift lever, the hand When the elastic function unit is compressed under the weight and normal gripping and operating force, and the posture detection unit detects the shortened state of the telescopic mechanism, it is possible to run and shift, and the operator gets on the grip of the travel shift lever. When the weight of the hand is removed or the hand is released from the grip, the elastic function part extends and returns, and the posture detection part detects the extension state of the telescopic mechanism and automatically stops the traveling mechanism and the auger automatically. A snowplow characterized by its characteristics. It has an endless track for driving on icy snow and its drive source, and it is a driving operation part of a self-propelled vehicle body equipped with a snow removal mechanism by an auger and a shooter. A travel shift lever that protrudes, is formed, stops traveling in a neutral position, and can be controlled to travel forward or backward at a speed substantially proportional to the tilt angle when operated to tilt forward or backward beyond the neutral position The weight of the operator's hand attached to the grip at any one of the lower end of the grip provided at the top end, the midway part of the buttock continuous below or the proper part of the lower side of the buttock, and It can be expanded and contracted while being stretched and biased in the axial direction by a resilient and repellent function part that exhibits an elastic force that can be easily compressed by normal gripping and operating force, The telescopic mechanism formed by providing an actuation end regulating portion capable of restricting the movement range of the center direction is formed in a predetermined moving range position which is regulated by the actuating end regulating portion of the expansion mechanism, and can detect the stretching operation state And a dead man switch for an endless track and an auger. A driving operation unit of a self-propelled vehicle body having an endless track for driving on ice and snow and a driving source thereof, and a snow removing mechanism by an auger and a shooter. Provided with a deadman switch button for starting and stopping switching, projecting and forming to the appropriate position on the operation panel, stopping the progress in a neutral position, and tilting the tilting angle either forward or backward beyond the neutral position The lower part of the grip provided at the top end of the traveling speed change lever that can be controlled to travel forward or backward at a speed approximately proportional to At any one of the locations, the operator's hand weight attached to the grip and an elastic force that can be easily compressed by normal gripping and operating force are generated. Forming an expansion / contraction mechanism provided with an operating end restricting portion that can be expanded and contracted while being stretched and biased in the axial direction by the elastically repellent functioning portion, and that can control a movement range in the axial direction, An endless track and a dead man switch for an auger are configured by providing an attitude sensing unit capable of detecting an expansion / contraction operation state at an appropriate position within a predetermined movement range regulated by the operation end regulating unit of the expansion / contraction mechanism. Features a snowblower. It has an endless track for driving on icy snow and its drive source, and it is a driving operation part of a self-propelled vehicle body equipped with a snow removal mechanism by an auger and a shooter. A travel shift lever that protrudes, is formed, stops traveling in a neutral position, and can be controlled to travel forward or backward at a speed substantially proportional to the tilt angle when operated to tilt forward or backward beyond the neutral position The weight of the operator's hand attached to the grip at any one of the lower end of the grip provided at the top end, the midway part of the buttock continuous below or the proper part of the lower side of the buttock, and It can be expanded and contracted while being stretched and biased in the axial direction by a resilient and repellent function part that exhibits an elastic force that can be easily compressed by normal gripping and operating force, The telescopic mechanism formed by providing an actuation end regulating portion capable of restricting the movement range of the center direction is formed in a predetermined moving range position which is regulated by the actuating end regulating portion of the expansion mechanism, and can detect the stretching operation state A deadman switch for an endless track and an auger provided with a posture sensing unit that is configured to be independent of the left and right independent handles extending rearward from the right and left sides of the driving operation unit, or driving operation. The loop-type handle that extends backward from the right and left sides of the part is provided to be integrated with the left and right, and the endless track and the auger are activated by gripping the handle with the left or right hand of the operator, A snow remover characterized in that it is provided with an endless track when the hand is released from the handle and an emergency stop of the auger. Telescopic mechanism, tubular was suspended integrally from the grip bottom exterior rod, housed concentrically therein, a compression coil spring is abutting the upper end in the vicinity immediately below the grip, is inserted from the tip the tubular sheath桿基end, 桿基end was so that is coupled to enable vertical sliding telescopic grip the lower end through the person said compression coil spring center, to receive the compression coil spring lower end midway place the outer peripheral surface of the arrangement the 桿基end After forming the elastically repellent functional part with the annular seating surface , a long hole of a predetermined length parallel to the axial center is drilled in the thickness direction at an appropriate position below the tubular outer casing in the elastically repellent functional part, An orthogonal engagement sliding pin is projected from an axial center at a proper position corresponding to the elongated hole below the annular seating surface of the base end portion so as to be vertically slidable within a predetermined range. is constituted by forming a working end regulating portion for regulating such And what will become, claims 1 to 6 snowplow set forth in any one.

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