JP2011256620A - Snow removal equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide snow removal equipment capable of smoothly performing snow removal work even if the snow is sherbet-like.SOLUTION: Snow removal equipment comprises: a snow raking rotary member 1 including a water turbine type rotor 10 at the left to right central position C, and screw rotors 11, 12 arranged adjacent to the left and right sides of the water turbine type rotor 10, respectively, the rotary member 1 being rotatively driven around a horizontal axis L; and a housing member 3 provided so as to enclose the rear vicinity of rear of the rotary member 1. Snow S is raked together in the horizontal axis L by the screw rotors 11, 12 and moved toward the central position C, while the snow S gathered in the central position C is raked out upwardly by the water turbine type rotor 10.

Description

  The present invention relates to a snow removal device.

Conventionally, a snow blower housing that opens to the front is attached to the front of the vehicle body on which the engine is mounted, and a snow collecting auger that rotates about the lateral axis by the rotational driving force of the engine is located in front of the housing. There has been widely known a snow removal device which is provided so as to be surrounded by a blower and is provided with a blower at the rear part of the housing for rotating the auger to collect the snow collected in the central part with a chute.
However, the conventional snow removal device simultaneously rotates the auger and the blower by the driving force from one engine, collects the snow in the center with the auger, and blows the snow upward with the blower. Therefore, the torque applied to the shaft connected to the engine is increased, and a very large load is applied to the engine, so that a failure is likely to occur.

  Therefore, the present inventor has proposed a snow removal device capable of performing snow removal work without applying a load to the engine (see Patent Document 1).

JP 2007-309050 A

The snow removal device described in Patent Document 1 was able to easily fly upward when removing newly accumulated snow, and the snow removal effect was very good.
However, when removing snow that has become sorbet-like after a while after it piles up, a large amount of snow gathers in the rotating member in a short time and clogs and hardens, causing a load on the engine. There was a problem. If the rotation of the rotating member is hindered, snow removal cannot be performed smoothly, so that the snow removal operation has to be interrupted and stopped, and the work efficiency may be reduced.

  Therefore, an object of the present invention is to provide a snow removal device that can smoothly remove snow even in the case of snow in a sherbet shape.

  A snow removal device according to the present invention includes a snow scraping rotating member having a water wheel type rotating body provided at a left and right central position, and a screw type rotating body provided adjacent to the left and right of the water wheel type rotating body, and The rotating member is driven to rotate about a horizontal axis, and further includes a housing member provided so as to surround the vicinity of the rear of the rotating member, and snow is moved in the horizontal axis direction by the screw-type rotating body. The snow is scraped and transferred to the central position, and the snow collected at the central position is scraped upward by the water wheel type rotating body.

  Also, a turbine-type rotor provided at a central position on the left and right sides and provided with a plurality of plate blades at a predetermined pitch in the circumferential direction, and a spiral shape provided adjacent to the left and right of the turbine-type rotor and opposite to each other A screw-type rotating body provided with a screw blade, and a shaft member that penetrates the rotating member as a skewer and rotates the rotating member around a horizontal axis. And a housing member provided so as to surround a rear vicinity of the rotating member, and the snow is scraped in the direction of the horizontal axis by the screw type rotating body and transferred to the central position. The snow collected in (1) is scraped upward by the waterwheel type rotating body.

Further, the water wheel type rotating body has a pair of disk portions arranged in parallel at both left and right end portions, and a plurality of the above-described outer peripheral surfaces of the cylindrical connecting portions connecting the disk portions and inner surfaces of the disk portions. The plate blade is fixed, and the plate blade is inclined forward at an inclination angle of 30 ° to 50 ° in the circumferential direction.
Further, the shaft member has a polygonal cross section, and a polygonal insertion hole portion into which the shaft member can be fitted into the water wheel type rotary body and the screw type rotary body is provided, and the insertion hole portion has a through hole. The shaft member is removably fitted.

  According to the snow removal device of the present invention, the torque at the moment of scraping the snow is reduced, and the load on the engine is greatly reduced, so that the rotating member can be smoothly rotated and snow removal work can be performed efficiently, It is possible to suppress engine failure. The water wheel type rotary body and the screw type rotary body can be rotated simultaneously, and the snow can be collected at the left and right central positions, and the collected snow can be surely blown upward. In addition, when all the rotating members are manufactured as one unit, the manufacturing cost of the mold becomes very expensive. However, the manufacturing cost of the mold is greatly increased by separately manufacturing the water wheel type rotating body and the screw type rotating body. And can be manufactured with high accuracy. Moreover, when the necessity for repair arises, a watermill type rotary body and a screw type rotary body can be divided | segmented and replaced | exchanged, without replacing | exchanging all rotary members as one.

It is the perspective view which showed one Embodiment of the snow removal apparatus of this invention. It is the partially broken front view which expanded and showed the principal part of the snow removal apparatus. It is a principal part expanded sectional front view of a snow removal apparatus. It is a principal part expanded sectional side view of a snow removal apparatus. It is a partially broken top view which illustrated the use condition of the snow removal apparatus. It is the perspective view which showed the other usage example of the snow removal apparatus.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
As shown in FIG.1 and FIG.2, the snow removal apparatus of this invention attaches the snow removal member 4 which scrapes and removes the snow S accumulated on the ground to the hand-held type brush cutter 40. As shown in FIG.
In the push-type brush cutter 40, the engine 6 and the wheel 7 are attached to a frame 8 having a handle 41, and the rotational driving force of the engine 6 is applied to a tip 5a of a holding rod 5 extending from the engine 6 in a forward and downward tilting direction. A rotation transmission portion 9 is provided, and the snow removal member 4 is attached to the tip 5 a of the holding rod 5 via the rotation transmission portion 9. The rotation transmitting portion 9 includes a gear case 18 at the tip 5 a of the holding rod 5, and the engine 6 and the gear in the gear case 18 are interlocked and connected by a drive shaft that is rotatably disposed inside the holding rod 5. Thus, the rotating shaft portion 19 protruding from the gear case 18 is configured to rotate around the horizontal axis L.

As shown in FIGS. 2 to 4, the snow removal member 4 includes a water wheel type rotary body 10 that scrapes the snow S upward, and screw type rotary bodies 11 and 12 that scrape the snow S in the direction of the horizontal axis L. A snow scraping rotating member 1 is provided.
The rotating member 1 penetrates the shaft member 2 that can transmit the rotational driving force of the engine 6 through the rotation transmitting portion 9 as a skewered shape, and is driven to rotate about the horizontal axis L. The shaft member 2 is made of a metal pipe having a polygonal cross section, and one end is fitted to the rotation shaft portion 19 of the rotation transmission portion 9. Further, a housing member 3 is provided in the vicinity of the rear of the rotating member 1. In other words, in FIGS. 2 and 3, the rotating member 1 is, as viewed from the front, sequentially from the left in the horizontal axis L direction to the right, the screw type rotating body 11, the water wheel type rotating body 10, and the screw. The mold rotating body 12 is arranged side by side so as to be separable and connectable, and is configured to rotate integrally as a skewered shape.
The rotating direction X of the rotating member 1 and the shaft member 2 is a forward direction in FIGS. 2 and 3 and a counterclockwise direction in FIG.

As shown in FIGS. 2 and 3, the water turbine type rotating body 10 is provided at the left and right center position C of the rotating member 1, and is provided with a plurality of plate blades 10 a. 4 exemplifies the case where four plate blades 10a are attached at an equal pitch of every 90 degrees, the number and pitch angle of the plate blades 10a can be appropriately changed in design. The water wheel type rotating body 10 is made of a synthetic resin, and it is preferable to use polyurethane or polyethylene as the material. In the water turbine type rotating body 10, a pair of disk parts 14, 14 are arranged in parallel at both left and right ends, and the disk parts 14, 14 are connected by a cylindrical connecting part 13. The plate blades 10a are fixed to the outer peripheral surface 13a of the connecting portion 13 and the inner surfaces 14a, 14a of the disc portions 14, 14, and are arranged radially. The plate blade 10a has an inner wall surface supported by the outer peripheral surface 13a of the connecting portion 13 and both left and right side surfaces supported by the inner surfaces 14a and 14a of the disk portions 14 and 14, so that it has high strength and is securely fixed. ing. Further, the plate blade 10a is inclined forward (inclined toward the rotational direction X) with an inclination angle θ ₀ of 30 ° to 50 ° in the circumferential direction R. The water wheel type rotating body 10 is provided with a polygonal insertion hole 15 that is open at the center of the disk portions 14 and 14 and can be inserted into the shaft member 2 without a gap. The shaft member 2 is inserted into the insertion hole 15. It is inserted in a removable manner and is skewered. That is, the water wheel type rotor 10 is configured to be driven to rotate by the shaft member 2 and scrape the snow S upward.

A pair of screw-type rotators 11 and 12 are provided adjacent to each other on the left and right of the water turbine-type rotator 10. The screw-type rotating bodies 11 and 12 are preferably manufactured using a synthetic resin made of metal or polyethylene. In the screw-type rotating bodies 11 and 12, a pair of disk parts 24 and 24 are arranged in parallel on both left and right ends, and the disk parts 24 and 24 are connected by a cylindrical connecting part 23. The screw-type rotators 11 and 12 are opened at the center of the disk portions 24 and 24 and have polygonal insertion holes 25 through which the shaft member 2 can be fitted without gaps. The shaft members are inserted into the insertion holes 25. 2 is inserted in a freely detachable manner and is skewered.
The screw-type rotating body 11 has screw blades 11 a that scrape snow S from the left to the right in the horizontal axis L direction (from the left outer side to the inner side) on the outer peripheral surface 23 a of the connecting portion 23. On the other hand, the screw-type rotating body 12 has screw blades 12a that scrape snow S from the right to the left in the horizontal axis L direction (from the right outside to the inside) on the outer peripheral surface 23a of the connecting portion 23. . That is, the pair of screw-type rotating bodies 11 and 12 are provided with screw blades 11a and 12a having spiral shapes opposite to each other, and the snow S is collected from the outside in the horizontal axis L direction by the screw blades 11a and 12a. Thus, it is configured to be transferred to a central position C where the water wheel type rotor 10 is disposed.
Therefore, the rotating member 1 scrapes the snow S in the direction of the horizontal axis L by the screw-type rotators 11 and 12 and transfers the snow S to the central position C, while collecting the snow S collected at the central position C by the turbine-type rotator 10. It is configured to scrape upward.

  Next, as shown in FIGS. 2 and 4, the housing member 3 is provided so as to surround the vicinity of the rear side of the rotating member 1. The housing member 3 is formed in a substantially J-shape having an upwardly inclined front cross section, and guides the snow S upward, and a rear side portion extends along each side portion of the snow throwing wall portion 31. It has the side wall parts 35 and 35 of the front-back direction formed integrally, and the snow-crawl member 33 attached along the lower end edge 32 of the snow throwing wall part 31. FIG. The snow throwing wall portion 31 has a flat plate portion 31b having a forwardly inclined shape in a cross section and a bent plate portion 31a integrally extending downward from the flat plate portion 31b. In addition, a mounting disc portion 17 of the gear case 18 is fixed to a lower portion of one of the left and right side wall portions 35, 35 (right side in FIG. 2) with a bolt, and a rotating shaft portion. A fixed annular part 36 having an opening part 36 a through which 19 is inserted is provided. A bearing member 46 is fixed to the lower inner surface side of the other side wall portion 35B (left side in FIG. 2). The snow scooping member 33 includes a scooping surface portion 33c formed along the lower end edge 32 of the snow throwing wall portion 31, a sloping surface portion 33b projecting forward from the scooping surface portion 33c, and a front end of the sloping surface portion 33b. And a slidable contact surface portion 33a formed horizontally at the rear side with a corner portion 37 having an acute angle in cross section.

The bearing member 46 has an inner ring (radial) bearing 47 to which the other end of the shaft member 2 having one end fitted to the rotary shaft portion 19 is mounted, and a bearing body having a hole 48a to which the outer ring of the bearing 47 is mounted. 48. The bearing body 48 is fixed to the inner surface of the side wall portion 35B with bolts. The bearing member 46 holds the shaft member 2 so that the horizontal axis L rotates smoothly without shaking.
The housing member 3 spans the shaft member 2 between the side wall portions 35A and 35B, and the curved plate portion 31a of the snow throwing wall portion 31 and the outer peripheral surface of the disc portion 14 are close to each other with a gap g having a predetermined dimension. The rotating member 1 is pivotally supported. The gap g is sufficiently narrow so that the snow S that is scraped and transferred to the central position C by the screw blades 11 a and 12 a does not concentrate on the waterwheel rotor 10 at a stretch.

1 and 5, the hand-held type brush cutter 40 has a spherical height setting tool 42 that is attached to an intermediate position of the holding rod 5 and holds the snow removing member 4 at a constant height. Yes. The wheel 7 is a hollow tire shape or barrel shape (shell structure) formed by blow molding, and has a diameter that is approximately the same as the height setting tool 42 or larger than the height setting tool 42. . A pair of auxiliary wheels are disposed on the left and right sides of the wheel 7. In addition, the push-type brush cutter 40 has one end 26 a detachably attached to the middle of the holding rod 5 and the other end 26 b attached to the rear portion of the housing member 3 to fix the direction of the snow removal member 4. have.
The engine 6 preferably has a maximum rotation output of 5000 to 10,000 rotations / minute (rpm). In this case, the rotation transmission unit 9 is configured to decelerate the rotation speed of the engine 6 and to rotate the rotation shaft unit 19 at 2500 to 5000 rotations / minute (rpm).

The use method (action) of the snow removal device of the present invention described above will be described.
As shown in FIGS. 1 to 4, when the engine 6 of the push-type brush cutter 40 is started, the shaft member 2 and the rotation member 1 connected to the rotation transmission unit 9 are rotated about the horizontal axis L in the rotation direction X. Rotate. When the brush cutter 40 is advanced by holding the handle 41, the sliding contact surface portion 33a of the snow scooping member 33 attached to the snow removal member 4 slides on the ground, and the snow S accumulated on the ground is scooped up by the inclined surface portion 33b. The snow S is smoothly taken into the housing member 3 and sent to the rotating member 1.

The rotating member 1 scratches the snow S coming from the front and disperses it in a scattered manner, and then flies upward from the central position C. At this time, the rotating member 1 rotates at a high rotational speed, breaks up the newly accumulated snow S, and crushes the snow S that has become sorbet-like or frozen and hardened over time. Fine grained.
As shown by arrows in FIGS. 3 and 4, the snow S that has contacted the rotating member 1 is thrust by the screw-type rotating bodies 11 and 12 and is scraped in the direction of the horizontal axis L. Since the snow S transferred to the inner side in the horizontal axis L direction is transferred to the central position C little by little through the gap g between the disk portion 14 and the snow throwing wall portion 31, the snow S is transferred to the plate blade 10a. There is no clogging. The fine-grained snow S moves smoothly without clogging the gap g. At the same time, the rotating member 1 scrapes the snow S collected at the central position C upward by the water wheel type rotating body 10. The waterwheel rotor 10 scrapes the snow S that has passed over the disk portion 14 and the snow S that is in direct contact with the plate blades 10a with the plate blades 10a to fly upward. Leaf blades 10a ... is because it is inclined forward with an inclination angle theta _0, scrape out reliably snow S. Since the rotary member 1 scrapes the snow S with the water wheel type rotor 10 provided at the center position C, the torque received by the shaft member 2 when scraping the snow is such that the snow S is scratched over the entire length in the horizontal axis L direction. In comparison, the load on the engine 6 is greatly reduced.

Then, the snow S blown upward from the center position C of the rotating member 1 is guided to the flat plate portion 31b of the snow throwing wall portion 31 and jumps out in the forward upward tilt direction. The housing member 3 prevents the snow S from being scattered to the side by the side wall portions 35 and 35, and guides and blows the housing member 3 in a fixed direction of forward upward inclination.
As shown in FIG. 5, the push-type brush cutter 40 rolls the height setting tool 42 on the ground and swings the tip 5 a of the holding rod 5 lightly from side to side. The snow S is removed in a circular arc shape while moving it greatly. In this way, the snow removal member 4 is swung to the left and right, and the snow is broadly scraped so as to be swept with a broom, thereby removing snow efficiently. In addition, if the snow removal is performed while adjusting the speed at which the snow removal member 4 is swung according to the amount of snow accumulation, there is no possibility of applying a load to the engine 6 and the number of parts used for the rotation transmission unit 9 can be reduced.

  Next, as another example of use of the snow removal device of the present invention, as shown in FIG. 6, a fixed bush member 26 and a snow removal member 4 are attached to a hand-held type brush cutter used for mowing. May be used as At this time, the guard member 43 that is attached to the intermediate position of the holding rod 5 and prevents the grass from flying to the user side and the grass cutting blade 44 that is attached to the rotation transmission unit 9 can be exchanged, so that the grass Remove the guard member 43 and the grass cutting blade 44 used as the arrows (arrow 51 in the figure), and replace them with the fixed rod member 26 and the snow removal member 4 used as the snow remover (arrow 52 in the figure) for proper use for mowing and snow removal. Is possible. Parts such as the engine 6 and the wheels 7 attached to the frame 8 are configured to be used for both mowing and snow removal.

  In the present invention, the design can be changed. For example, the disk parts 14 and 14 of the water wheel type rotor 10 and the disk parts 24 and 24 of the screw type rotors 11 and 12 are provided with through holes or cuts. A notch may be formed (not shown). By carrying out like this, not only from the clearance gap g formed between the disc part 14 and the snow throwing wall part 31, but a lot of snow S can be sent to the waterwheel type rotary body 10 through a through-hole or a notch. Can be transferred to the central position C more smoothly.

  As described above, the present invention is a snow scraping rotation having the water wheel type rotating body 10 provided at the left and right center position C and the screw type rotating bodies 11 and 12 provided adjacent to the left and right of the water wheel type rotating body 10, respectively. The rotary member 1 includes a housing member 3 that is rotated around the horizontal axis L and is provided so as to surround the vicinity of the rear of the rotary member 1. , 12 is used to scrape the snow S in the direction of the horizontal axis L and transfer it to the central position C and to scrape the snow S collected at the central position C upward by the water wheel type rotor 10. Thus, the torque at the moment of scraping the snow S is reduced and the load applied to the engine 6 is greatly reduced, so that the rotating member 1 can be rotated smoothly at all times, and snow removal work can be performed efficiently, and the engine 6 and the like It is possible to suppress the failure. The water wheel type rotary body 10 and the screw type rotary bodies 11 and 12 can be rotated simultaneously, and the snow S can be scraped to the left and right central positions, and the collected snow S can be reliably blown upward. Further, when the rotating member 1 is manufactured as a whole, the manufacturing cost of the mold becomes very expensive. However, by separately manufacturing the water wheel type rotating body 10 and the screw type rotating bodies 11 and 12, the mold is manufactured. Manufacturing costs can be greatly reduced, and high-precision manufacturing can be achieved. Moreover, when the necessity of repair arises, the waterwheel type rotary body 10 and the screw type rotary bodies 11 and 12 can be divided | segmented and replaced | exchanged, without replacing | exchanging all the rotating members 1 as one body.

  Further, the turbine-type rotor 10 provided at the left and right center position C and provided with a plurality of plate blades 10a at a predetermined pitch in the circumferential direction R is provided adjacent to the left and right of the turbine-type rotor 10 and opposite to each other. And a screw-type rotating body 11 and 12 having screw blades 11a and 12a having a spiral shape, and passing through the rotating member 1 in a skewered manner. It has a shaft member 2 that is driven to rotate around the center L, and further has a housing member 3 that is provided so as to surround the vicinity of the rear side of the rotating member 1. Since the snow S collected in the central position C is scraped upward by the water wheel type rotor 10, the snow S is scraped by the rotating member 1. The torque that the shaft member 2 receives instantaneously decreases, and the load applied to the engine 6 is greatly reduced. Therefore, the rotating member 1 can be rotated smoothly at all times, and snow removal work can be efficiently performed. Failure can be suppressed. The water wheel type rotary body 10 and the screw type rotary bodies 11 and 12 can be simultaneously rotated as a skewered shape integrally with the shaft member 2, and the snow S is collected to the left and right central positions and the collected snow S is collected. Can be reliably blown upward. Further, when the rotating member 1 is manufactured as a whole, the manufacturing cost of the mold becomes very expensive. However, by separately manufacturing the water wheel type rotating body 10 and the screw type rotating bodies 11 and 12, the mold is manufactured. Manufacturing costs can be greatly reduced, and high-precision manufacturing can be achieved. Moreover, when the necessity for repair arises, the waterwheel type | mold rotary body 10 and the screw type | mold rotary body 11 and 12 can be extracted and divided | segmented and replaced | exchanged, without replacing | exchanging all the rotation members 1 as one body. it can.

In addition, the water wheel type rotating body 10 includes a pair of disc portions 14 and 14 arranged in parallel at both left and right end portions, and an outer peripheral surface 13a and a disc portion of a cylindrical connecting portion 13 that connects the disc portions 14 and 14. the inner surface 14a of 14,14, secured a plurality of plate vanes 10a to 14a, further, the plate blade 10a, since the inclined forward with an inclination angle theta ₀ of 30 ° to 50 ° in the circumferential direction R, the horizontal axis Since the snow S transferred inward in the L direction is transferred little by little through the gap g between the disk portion 14 and the snow throwing wall portion 31 to the central position C, the snow S does not clog the plate blade 10a. The snow S can be surely scraped out by the water wheel type rotor 10. Further, the strength of the plate blades 10a can be improved and fixed reliably. Further, the water wheel type rotating body 10 rotates while holding the snow S on the plate blades 10a, and can be scraped reliably.

  Further, the shaft member 2 has a polygonal cross section, and polygonal insertion holes 15 and 25 into which the shaft member 2 can be fitted into the water wheel type rotary body 10 and the screw type rotary bodies 11 and 12 are provided to pass through. Since the shaft member 2 is detachably fitted in the insertion holes 15 and 25, the water wheel type rotary body 10 and the screw type rotary bodies 11 and 12 are arranged in the horizontal axis L direction so as to be separable and connectable. It can be configured as an integral rotating member 1 that is skewered. That is, the snow S can be scraped out stably by rotating the water wheel type rotary body 10 and the screw type rotary bodies 11 and 12 coaxially. In addition, the replacement and repair of the water wheel type rotary body 10 and the screw type rotary bodies 11 and 12 can be performed very easily.

DESCRIPTION OF SYMBOLS 1 Rotating member 2 Shaft member 3 Housing member 10 Water wheel type | mold rotary body 10a Plate blade 11 Screw type rotary body 11a Screw blade 12 Screw type rotary body 12a Screw blade 13 Connection part 13a Outer peripheral surface 14 Disc part 14a Inner surface 15 Insertion hole part 25 Insert hole C Left and right center position L Horizontal axis S Snow R Circumferential direction θ ₀ Inclination angle

Claims (4)

A snow scraper having a water wheel type rotating body (10) provided at the left and right central position (C) and screw type rotating bodies (11) and (12) provided adjacent to the left and right of the water wheel type rotating body (10), respectively. A housing provided with a rotating member (1), the rotating member (1) being driven to rotate around a horizontal axis (L), and further surrounding the vicinity of the rear of the rotating member (1) Having a member (3),
Snow (S) is scraped in the direction of the horizontal axis (L) by the screw-type rotating bodies (11) and (12), transferred to the central position (C), and collected at the central position (C) ( A snow removal device characterized in that S) is scraped upward by the waterwheel rotor (10). A turbine-type rotating body (10) provided at a central position (C) in the left-right direction and provided with a plurality of blades (10a) at a predetermined pitch in the circumferential direction (R), and left and right of the turbine-type rotating body (10) A screw type rotating body (11) (12) provided with screw blades (11a) (12a) provided adjacently and having spiral shapes opposite to each other, and a snow scraping rotating member (1) having And a shaft member (2) that penetrates the rotating member (1) as a skewer and drives the rotating member (1) to rotate about a horizontal axis (L). A housing member (3) provided so as to surround the rear vicinity;
Snow (S) is scraped in the direction of the horizontal axis (L) by the screw-type rotating bodies (11) and (12), transferred to the central position (C), and collected at the central position (C) ( A snow removal device characterized in that S) is scraped upward by the waterwheel rotor (10). The water wheel type rotating body (10) has a pair of disc parts (14) (14) arranged in parallel at both left and right ends, and a cylindrical connecting part (14) connecting the disc parts (14) (14) ( The plate blades (10a) are fixed to the outer peripheral surface (13a) of 13) and the inner surfaces (14a) (14a) of the disk portions (14) and (14), and the plate blades (10a) The snow removal device according to claim 2, wherein the snow removal device is inclined forward at an inclination angle (θ ₀ ) of 30 ° to 50 ° in the circumferential direction (R). The shaft member (2) has a polygonal cross section, and has a polygonal shape that allows the shaft member (2) to be inserted into the water wheel type rotating body (10) and the screw type rotating body (11) (12). The snow removal device according to claim 2 or 3, wherein a hole (15) (25) is provided so that the shaft member (2) is removably fitted in the insertion hole (15) (25). .

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