JPH0410296Y2 - - 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 to use synthetic resin cutting edges instead of conventional steel ones for snow plow cutting edges. 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 object of this invention is to provide a cutting edge mounting structure which can sufficiently satisfy the mounting strength of a synthetic resin cutting edge. The next purpose of this invention was to use a cutting edge made of synthetic resin to smoothly perform snow removal operations without damaging the road surface, and 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, a presser member for sandwiching the cutting edge made of synthetic resin between the cutting edge made of steel, and a cutting edge made of synthetic resin that is held by the presser member. The cutting edge has a counterbore formed on the joint surface, and a stopper pawl that is integrally formed on the holding member and is fitted into and engaged with the counterbore. The synthetic resin cutting edge is chucked between the holding member and the steel cutting edge by tightening the mounting bolts and nuts to the back side of the edge support part, and the synthetic resin cutting edge is inserted between the two and below. It is characterized by an extended holding edge.

【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 that is mainly 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. In this resin edge 8, a counterbore portion 12 is formed near the upper portion of the opposite surface from the steel edge 4. When attaching the resin edge 8, a presser member 9 and a spacer 10 are used. The holding member 9 illustrated in FIG. 2 is made of a steel plate and has a bolt hole 11 into which the through bolt 5 is fitted, and a stopper claw 13 which is integrally formed to fit into and engage with the counterbore 12. have. 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,
Also, the stopper claw 13 of the presser member 9 is fitted into the counterbore portion 12 of the resin edge 8 and engaged. In addition, the back side of the edge support part 2 and the presser member 9
A spacer 10 is interposed between the upper end side and the upper end side. 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 the engagement of the stopper pawl 13 with the counterbore portion 12, and the resin edge 8 is strongly chucked between the presser member 9 and the steel edge. It is held securely and firmly in a state where it extends downward from the space between it and 4. The blade 1 equipped with the resin edge 8 in this way can be used as a snow plow,
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, the resin edge 8 performs the snow removal work. There is no risk of it getting stuck between the steel edge 4 and the holding member 9 or coming out from between them. In the embodiment shown in FIG. 3, a flange 9' extending toward the edge support section 2 is integrally formed at the upper end of the presser member 9. In the case of this embodiment, since the flange 9' functions as the spacer 10 in the previous embodiment, the spacer 10, which is separate from each of the edge support portion 2 and the holding member 9, can be eliminated, and the number of parts can be reduced. . In addition, in the above figure 3, figures 1 and 2
The same parts as in the figures are given the same reference numerals to avoid redundant explanation. 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 and held 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, the resin edge is chucked as described above with the upper end abutting the lower end of the edge support of the blade and the stopper claw of the presser member engaging with the counterbore portion of the resin edge itself. The steel edge and the holding member are held in a reliable and firm state without any risk of them sinking into or falling out from between the steel edge and the holding member due to the load during snow removal work. 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 the drawing]

Fig. 1 is a perspective view of a blade according to a preferred embodiment of this invention, Fig. 2 is an enlarged sectional view of the cutting edge attachment part of the same blade, and Fig. 3 is a cutting diagram according to another embodiment of this invention. It is a sectional view of an edge attachment part. 1...Blade, 2...Edge support part, 4
... Steel cutting edge, 5 ... Bolt, 6 ... Nut, 8 ... Synthetic resin cutting edge, 9 ... Pressing member, 12 ... Counterbore,
13...Stoppa claw.

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. a synthetic resin cutting edge that abuts against the lower end of the edge support portion, a presser member for sandwiching the synthetic resin cutting edge with a steel cutting edge, and a presser member that presses the synthetic resin A counterbore formed on the joint surface of the cutting edge;
A stopper claw is formed integrally with the presser member and is fitted into and engaged with the counterbore, and the presser member is fastened to the back surface of the edge support portion using the same mounting bolts and nuts as the steel cutting edge. A cutting edge made of synthetic resin is chucked between a presser member and a cutting edge made of steel, and the cutting edge made of synthetic resin extends downward from between the two. Edge mounting structure. (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. (4) Utility model registration claims 1 to 3, characterized in that the upper end of the presser member is integrally formed with a flange that faces the back surface of the edge support part and abuts against the back surface. The cutting edge mounting structure described in any of the above.