JPS6338270Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention mainly relates to a structure for attaching a cutting edge made of synthetic resin to a snow plow.

[Conventional technology]

In the case of conventional snow plows, the steel cutting edge used for ordinary earthwork work is used as is, which is attached to the front lower part of the blade that forms the plow body.

However, in the case of steel cutting edges, there is not only a risk of damaging the road surface during snow removal work, but also a sharp shock when hitting a protrusion such as a manhole cover on the road surface. There was a risk that the operator would suffer chest bruises or other injuries.

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.

In other words, in the case of synthetic resin cutting edges,
Similar to steel cutting edges, with a configuration where bolt holes are drilled at equal intervals in the longitudinal direction midway in the height direction and bolts are secured to the tip of the blade, the load is concentrated on the bolt holes during blade work. The drawback is that cracks may form around the bolt holes, or the bolts tend to loosen.

Although such a technique for securely fixing a synthetic resin cutting edge to a blade has never been seen before, for example, a structure in which a synthetic resin anti-friction plate is fixed to the earth-contacting surface of the blade is not known. There is.

In the device for attaching an anti-friction plate to an earthwork board according to Utility Model Application Publication No. 55-123064, the anti-friction plate is bent along the surface of the earthwork board, and its upper and lower ends are connected to clamps provided at the upper end of the earthwork board and the lower end. It engages with a dovetail groove formed between the provided excavation blade.

In addition, in the lining attachment for earthwork work according to Utility Model Application Publication No. 58-80463, the lining plate is covered with a stopper member or a presser plate from above and bolted to the blade, etc., and the lower end of the lining plate is shaped like an L in cross section. A configuration in which engagement is performed using a stopper member is known.

In this type of structure for fixing antifriction plates or lining plates, engagement is required below them (above the cutting edge), so the fixing structure for synthetic resin cutting edges is cannot be used.

Therefore, in this type of field, there has been a need for a structure in which a cutting edge made of synthetic resin can be securely fixed by tightening bolts only in the middle.

[Problem that the invention attempts to solve]

This idea was developed in view of the above circumstances, and its main objective was to facilitate the positioning of the cutting edge when attaching it to the blade used in snow plows, etc., and to improve its attachment strength. It is about increasing.

[Means for solving problems]

In order to achieve the above-mentioned problems, this invention (a) attaches a cutting edge made of synthetic resin to the lower edge of the front side of the blade used in snow plows etc. via a reinforcing plate; protecting the cutting edge by sandwiching it between the reinforcing plate and the edge holding member; (c) bolting each of the reinforcing plate and the edge holding member together to the blade to secure both the reinforcing plate and the edge holding member; (d) a counterbore is formed in the cutting edge without providing a hole for inserting the bolt; e) integrally forming a stopper on the presser member or reinforcing plate corresponding to the counterbore, and engaging the stopper with the counterbore to position the cutting edge; (f) positioning the cutting edge; A technical measure is taken in which the lower end extends downward from between the presser member and the reinforcing plate to serve as the working surface of the cutting edge.

[Effect]

The counterbore of the cutting edge engages with a stopper formed integrally with the presser member or the reinforcing plate, thereby positioning the cutting edge for attachment.

In this state, the holding member and the reinforcing plate are bolted to the blade with the cutting edge in between, so there is no need to provide a hole for the bolt to pass through the cutting edge, and there is no need for the bolt to pass through.

In addition, the lower end of the clamped cutting edge protrudes downward from the presser member and the reinforcing plate and becomes the working surface of the cutting edge, and the portion that is engaged and pinched by the presser member and the reinforcing plate is in a horizontal state. This prevents deformation and protects the outer peripheral surface by covering it with the holding member.

〔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 configuration used as an angle snow plow, and its edge support part has bolt holes 2 (see Figs. 2 and 3) at regular intervals along the longitudinal direction. It is perforated.

The bolt hole 2 is an existing bolt hole for attaching a steel cutting edge to a conventional blade.

A cutting edge 3 made of synthetic resin (hereinafter referred to as resin edge) is attached to the blade 1 in place of the conventional cutting edge made of steel.

When installing it, a metal reinforcing plate 4, an edge pressing member 5, a bolt 6, a nut 7, and washers 8, 9 are used, respectively.

That is, the reinforcing plate 4 is a flat plate sandwiched between the resin edge 3 and the blade 1, and the bolt hole 2 of the blade 1 is inserted into the reinforcing plate 4.
It has a bolt hole 4A near the upper end side for matching and communicating with it.

Resin Edge 3 is integrally formed from a resin material whose main 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.

This resin edge 3 does not have a hole for inserting a bolt therethrough, and counterbore portions 3A and 3B are formed on both sides of the upper end surface in the longitudinal direction.

On the other hand, the edge holding member 5 is moved from the upper end to the blade 1.
The flange 5A extending toward the side is made of an integrally bent angle member.

The edge holding member 5 has bolt holes 5B located at regular intervals along the longitudinal direction to face the bolt holes 2 of the blade 1 through the bolt holes 4A of the reinforcing plate 4.

Further, on both longitudinal sides of the inner surface of the edge holding member 5, stoppers 5C and 5D are provided for fitting into and aligning the counterbore portions 3A and 3B of the resin edge 3 below the alignment area of the bolt hole 5B. are integrally formed.

In this manner, the reinforcing plate 4 is sandwiched between the blade 1 and the resin edge 3, and at the same time, the stoppers 5C and 5D of the edge pressing member 5 are fitted into the counterbore portions 3A and 3B of the resin edge 3 and aligned.

In this state, the bolts 6 are inserted through the bolt holes 5B, 4A, and 2 of the edge pressing member 5, the reinforcing plate 4, and the blade 1 via the washers 8,
A nut 7 is screwed onto the bolt 6 via a washer 9.

By tightening the nut 7, the edge holding member 5 and the reinforcing plate 4 are fixed together with the blade 1 through the resin edge 3 between them.

That is, in this case, the edge pressing member 5 is in a state in which the flange 5A at the upper end presses against the blade 1, and the face plate portion at the lower end presses the resin edge 3.

Therefore, the resin edge 3 is held under pressure by the reinforcing plate 4 and the edge pressing member 5.

Furthermore, in this case, the resin edge 3 and the edge pressing member 5 are engaged with each other by fitting and aligning the stoppers 5C, 5D and the counterbore portions 3A, 3B as described above.

Therefore, the resin edge 3 is positioned and is held securely and firmly without fear of slipping out from between the reinforcing plate 4 and the edge holding member 5.

In addition, in such an attached state of the resin edge 3, the illustrated reinforcing plate 4 extends from between the blade 1 and the resin edge 3 to the vicinity of the lower end of the edge.

Therefore, the reinforcing plate 4 can sufficiently provide the strength of the resin edge 3 against the load that the resin edge 3 receives from the front side during snow removal work or the like.

In addition, the stoppers 5C and 5D in the above embodiment
may be formed integrally with the reinforcing plate 4. In this case, if the front and back sides of the resin edge 3 are reversed, the stoppers on the reinforcing plate 4 side can be fitted into the counterbore portions 3A and 3B to align them. Therefore, the same effects as in the above embodiment can be obtained.

In addition, the above-mentioned counterbore portions 3A, 3B and the stopper 5
C and 5D are not limited to both sides of the resin edge 3 and the edge pressing member 5 or reinforcing plate 4, but may be provided at appropriate positions in the longitudinal direction thereof.

[Effect of idea]

According to this invention, the cutting edge made of synthetic resin is sandwiched between a reinforcing plate and an edge holding member, and the reinforcing plate and edge holding member are bolted to the blade, so that the cutting edge is directly penetrated by the bolt. This eliminates the risk of cracks and damage caused by bolt holes.

Moreover, since the cutting edge can be positioned at a predetermined position with the counterbore engaged with the reinforcing plate or the stopper of the edge pressing member, the installation work is facilitated.

Furthermore, the upper front and rear surfaces of the cutting edge are held in a horizontal position by being held under pressure by both the edge holding member and the reinforcing plate, so that no load is applied to the working surface of the lower end of the cutting edge during work. Even if a force is applied in the direction of curving the cutting edge, this is prevented, the cutting edge is prevented from falling off, and the mounting strength is sufficiently ensured.

Further, since the edge holding member covers the front side of the cutting edge, it also serves as a protective cover.

Therefore, operations such as snow removal can be carried out smoothly by the cutting edge, there is no risk of damaging the road surface during such operations, and the shock that occurs when bumping into a protrusion on the road surface can be absorbed and alleviated. Not only can the characteristics of the resin edge be fully demonstrated, but it also greatly contributes to improving operator safety.

[Brief explanation of the drawing]

The drawings show a preferred embodiment of this invention; FIG. 1 is a perspective view of the blade, FIG. 2 is an enlarged sectional view of the cutting edge attachment part of the blade, and FIG.
FIG. 3 is an exploded view of FIG. 2. 1...Blade, 3...Cutting edge,
3A, 3B...Spot facing portion, 4...Reinforcement plate, 5...
Edge holding member, 5C, 5D...stopper, 6...
…bolt.

Claims (1)

[Claims for Utility Model Registration] (1) A cutting edge made of synthetic resin that is attached via a reinforcing plate to the front lower edge of a blade used in a snow plow, etc.; and an edge holding member to be sandwiched between the reinforcing plate and the edge holding member, the reinforcing plate and the edge holding member are each bolted together to the blade, and the cutting edge is held under pressure between both the reinforcing plate and the edge holding member. A mounting structure for fixing to the blade, wherein the cutting edge has a counterbore portion without providing a hole for inserting the bolt, and a counterbore portion is formed in the presser member or the reinforcing plate corresponding to the counterbore portion. A mounting structure for a resin cutting edge, characterized in that a stopper is integrally provided and engages with the counterbore, and the lower end of the cutting edge extends downward from between the presser member and the reinforcing plate. . (2) A practical use characterized in that a bolt insertion hole is opened at a position where the reinforcing plate and the edge holding member face each other, and the upper end of the cutting edge is arranged at a position below the bolt insertion hole. A mounting structure for a resin cutting edge according to claim 1 of the patent registration claim. (3) The edge pressing member is an angle member having a flange that is bent from the upper end toward the blade side and abuts against the blade surface. Mounting structure of the resin cutting edge described in section. (4) Attaching the resin cutting edge according to claim 1 of the utility model registration, characterized in that the cutting edge is made of a synthetic resin with low friction and low adhesion such as ultra-high molecular weight polyethylene. structure. (5) Any one of claims 1 to 4 of the claims for utility model registration, characterized in that the counterbore and the stopper are provided on both sides of the cutting edge and the reinforcing plate or the edge holding member in the longitudinal direction. Mounting structure of the resin cutting edge described in .