JPH0336598Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention mainly relates to a cutting edge attachment structure for a blade used as a snow plow.

[Prior art and its problems]

It is well known that earthwork blades are generally used as snow plows. Although this type of blade is equipped with a steel cutting edge, the reality is that when the blade is operated as a snow plow, the steel cutting edge is used as is for snow removal work. .

[Problems with conventional technology]

However, in the case of steel cutting edges, there is not only the risk of damaging the road surface during snow removal work, but also the sudden shock caused by bumping into protrusions such as manhole covers on the road surface. There is a risk of bruising or injury to the operator's chest, and there is also a risk of damaging the plow itself, that is, the blade itself. Therefore, in recent years, there has been a tendency for snow plow cutting edges to be made of synthetic resin instead of the conventional ones made of steel. However, in the case of synthetic resin cutting edges, there are problems such as how to easily and stably attach them to a snow plow and how to ensure sufficient mounting strength.

[Purpose of invention]

This idea was made in view of the above circumstances, and its main purpose was to create a blade made of synthetic resin without requiring any repair work on existing blades used in snow plows, etc., and without removing the steel cutting edge. To provide a cutting edge mounting structure which allows a cutting edge to be easily and skillfully mounted. Another purpose of this invention is to use a cutting edge made of synthetic resin to smoothly perform snow removal operations without damaging the road surface, and to be able to absorb and alleviate the shock when bumping into a protrusion on the road surface. To provide a cutting edge mounting structure which can greatly contribute to improving safety. Another purpose of this invention is to provide a cutting edge mounting structure that allows the existing steel cutting edge to protect the plow body when the synthetic resin cutting edge wears out and reaches its limit. There is something to do.

[Structure of the idea]

In order to achieve the above object, this invention has a cutting edge mounting structure in which a steel cutting edge is bolted to the front side of the edge support part of the blade, and the upper end is attached to the back surface of the steel cutting edge and the upper end is attached to the back side of the steel cutting edge. A cutting edge made of synthetic resin that abuts against the lower end of the edge support part, and a presser member for sandwiching the cutting edge made of synthetic resin between the cutting edge made of steel, and the presser member is held between the cutting edge made of steel and the cutting edge made of steel. The synthetic resin cutting edge is chucked between the holding member and the steel cutting edge by fastening it to the back side of the edge support part with the same mounting bolts and nuts as the cutting edge, and from below between the two. It is characterized by a cutting edge mounting structure in which a synthetic resin cutting edge extends from the top.

【Example】

Hereinafter, preferred embodiments of this invention will be described in detail based on the drawings. In FIG. 1, reference numeral 1 denotes a blade of a well-known construction used as an angle snow plow. Therefore, bolt holes 3 are already provided in the edge support portion 2 of the blade 1 at regular intervals along the longitudinal direction. A common steel cutting edge (hereinafter referred to as steel edge) 4 is fastened to the front side of the edge support portion 2 through a bolt hole 3 with a through bolt 5 and a nut 6. The above is the well-known mounting structure of the steel edge 4. When the edge 4 is fastened, there is an edge support part 2 on the back side as shown in more detail in FIG.
A stepped portion 7 is formed with the lower edge of the . A synthetic resin cutting edge (hereinafter abbreviated as resin edge) 8 is removably attached using this stepped portion 7 . Resin Edge 8 is integrally formed from a resin material whose main raw material is ultra-high molecular weight polyethylene, which has low friction and low adhesion, and has a paraffin-like surface and excellent properties such as water repellency and durability. have. Further, the resin edge 8 is connected to the edge support portion 2.
It is formed thicker than the wall thickness of the steel edge 4, and has a size that extends downward along the back surface of the steel edge 4 when the upper end abuts against the lower edge of the edge support part 2. When attaching the resin edge 8, a holding member 9 and a spacer 10 are used. In the case of the holding member 9 illustrated in FIG. 2, it is made of a steel plate and has a bolt hole 11 into which the through bolt 5 is fitted. Therefore, when attaching the resin edge 8 to the blade 1, the through bolt 5 that fastens the ordinary steel edge 4 to the edge support part 2 of the blade 1
Remove only nut 6. Then, the through bolt 5 is fitted into the bolt hole 11 of the presser member 9, and the nut 6 is temporarily tightened. Next, a resin edge 8 is interposed between the steel edge 4 and the pressing member 9, and the upper end of the resin edge 8 is brought into contact with the lower end of the edge support part 2,
Moreover, a spacer 10 is interposed between the back surface of the support portion 2 and the upper end side of the pressing member 9. In this state, by tightening the nut 6, the resin edge 8 is chucked by the steel edge 4 and the holding member 9. In this case, the resin edge 8 is strongly chucked by the elastic force of the steel presser member 9 tightened with the nut 6, and is held in a state extending downward from between the presser member 9 and the steel edge 4. . The blade 1 equipped with the resin edge 8 in this way is used as a snow plow, so that
The resin edge 8 performs the snow removal work, and since the resin edge 8 is strongly chucked as described above and the upper end abuts the lower end of the edge support part 2, it is pressed against the steel edge 4 during the snow removal work. There is no risk that it will sink in between it and the member 9 or fall out from between them. As described above, according to this invention, by simply tightening the holding member of the resin edge with the bolts and nuts for tightening the steel edge of the existing blade,
The resin edge can be chucked between the pressing member and the back surface of the steel edge. Therefore, there is no need for any repair work on the existing blade, and the resin edge can be added simply and skillfully without removing the steel edge. Moreover, since the resin edge is chucked and held as described above with the upper end abutting against the lower end of the edge support of the blade, the resin edge sinks between the steel edge and the holding member due to the load during snow removal work. I have no fear that I will. Therefore, the resin edge allows the snow removal work to be carried out smoothly without any hindrance, does not damage the road surface during the work, and fully takes advantage of the characteristics of the resin edge, which is that it can absorb and alleviate the shock caused by bumping into a protrusion on the road surface. This greatly contributes to improving operator safety. Furthermore, when the resin edge reaches its limit due to wear and tear due to repeated snow removal operations, the steel edge can protect the blade that forms the plow body. Therefore, there is no risk that the blade itself will be damaged due to the progress of wear of the resin edge.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a blade according to a preferred embodiment of the invention, and FIG. 2 is an enlarged sectional view of a cutting edge attachment portion of the same blade. 1...Blade, 2...Edge support section, 4
...Steel cutting edge, 5...Bolt, 6...Nut, 8...Synthetic resin cutting edge, 9...Press member.

Claims (1)

[Claims for Utility Model Registration] (1) In a cutting edge mounting structure in which a steel cutting edge is bolted to the front side of the edge support portion of the blade, the cutting edge is attached to the back side of the steel cutting edge and the upper end thereof is attached to the back side of the steel cutting edge. is provided with a synthetic resin cutting edge that abuts against the lower end of the edge support portion, and a presser member for sandwiching the synthetic resin cutting edge with a steel cutting edge, and the presser member is made of steel. Fasten the synthetic resin cutting edge to the back side of the edge support part using mounting bolts and nuts common to the synthetic resin cutting edge and chuck the synthetic resin cutting edge between the holding member and the steel cutting edge,
A cutting edge mounting structure characterized in that a synthetic resin cutting edge extends downward from between the two. (2) The synthetic resin cutting edge is an integrally molded synthetic resin product whose main material is ultra-high molecular weight polyethylene with low friction and low adhesion. Cutting edge mounting structure described in section. (3) The cutting edge mounting structure according to claim 1, wherein the holding member is made of a metal plate fastened via a spacer on the back side of the edge support portion.