JPS5913055Y2 - Grouped blade for splitting concrete protrusions - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a set of blades for simultaneously dividing a plurality of protrusions lined up on the surface of a concrete material.

For example, in order to split a large number of contour ridges 2 arranged in parallel on the surface of the concrete base material 1 shown in FIG.
Therefore, the direction toward each protrusion 2 is driven along the surface of the base material.

It is well known that when the protrusions 2 are separated, the fractured surfaces 2' behind the protrusions 2 line up as shown in FIG. 2, resulting in an attractive surface different from the molding surface.

However, in order to cut a large number of ridges 2 at the same time, it is necessary to cut the same or more number of cutting edges as the ridges on a wide blade plate and harden it without distortion.

During use, parts tend to break, so if they wear out, the whole thing has to be remade.

In addition, even in mass-produced products such as concrete blocks, the surface cannot avoid some degree of distortion, so the height of the fracture surface 2' after splitting the protrusions from the base material surface is uneven, reducing the appearance improvement effect. There was a problem.

This invention solves these problems by making improvements to the blade.

The configuration of this invention will be explained below with reference to the illustrated embodiments.

In the embodiment shown in FIGS. 3 and 4, serrated divided blades 3a having the same pitch as the two groups of protrusions are arranged in a number whose width is wider than the length of the protrusions 2.

5 and 6 show that the divided blade 3 or 3a is further subdivided in the longitudinal direction to form a bar-shaped divided blade 3b.

In each case, a blade support frame 4, a spherical cumulative layer 6 laid on the bottom surface of the support frame 4, and a split piece that is fitted into the open surface of the support frame 4 with the rear end face against the spherical cumulative layer 6 and the cutting edge facing outward. The main parts are blades 3, 3a or 3b group, etc.

In this case, in order to prevent the split blade from falling off even when the cutting edge is turned downward, a play hole 7 is made at the base of the blade, and a split blade support bolt 8 passed through the play hole 7 is fastened to the side wall of the support frame 4. It may be a structure.

The support frame 4 shown in FIGS. 3, 4, 5, and 6 has an integral box shape and is capable of sealing the spherical cumulative layer 6.

Although not shown, both engage with the drive mechanism.

Generally, steel balls are practically used as the spheres of the sphere accumulation layer 6, but other materials may be used as long as they can transmit the aforementioned lowering blade of the receiving box 4 to the cutting edge.

In order to create heights at each cutting edge, it is necessary to accumulate a large number of small diameter spheres to fill the space between the receiving box 4 and the rear end surface of each divided blade.

If you use a sphere, unlike a rubber plate, the dented part of the rolling blade will not be larger than the undented part, and it will be more durable.

It is desirable to provide lubricating oil to the steel balls.

The split blade support bolt & is a regular bolt or nut in the figure, but it can also be a long pin, etc. In short, it is a bar that prevents the blade from falling even when the blade holder 4 is facing downward. .

The bolt 8 is passed through the play hole 7 formed in each divided blade with enough play to allow the blade edge to move vertically due to the spherical layer 6 described above.

Note that if the knife holder 4 is always placed on its back and used with the cutting edge facing upward, the support bolt 8 and idle hole 7 are not required, but in that case, concrete powder tends to get trapped between the split blades, so countermeasures are required. become.

In order to fit the divided blade group into the open surface of the cutlery receiving box 4 without any play, it is also possible to insert a substitute material other than the cutlery into a part of it, and insert the cutlery only in the required area.

The shape of each segmented blade varies widely depending on design conditions and the designer's known techniques.

This idea uses a group of blades lined up over a wide area to divide the concrete ridges all at once, but instead of making them all in one piece, it is made into a group of blades, and each divided blade adapts to the height and distortion of the surface of the concrete base material. As a result, the production and maintenance costs were reduced, and the height of all the protrusion-divided surfaces became uniform compared to the base metal surface, improving the appearance.

[Brief explanation of the drawing]

Figures 1 and 2 are perspective views showing an example of the concrete base material with ridges and its state after the ridges have been removed; Figures 3-4 are elevation and plan views of an embodiment of this invention; Figure 5 Figure 6 is an elevational and plan view of another embodiment. 3, 3a, 3b... split blade, 4...
...Knife holder, 6...Spherical cumulative layer.

Claims (1)

[Scope of utility model registration request] The cutting edge is inserted into the gap between adjacent groups of ridges arranged in parallel on the surface of the concrete base material, and during operation, the cutting edge is pressed down to the base material side to the extent that it does not escape, and each ridge is simultaneously divided by driving along the surface of the base material. In the set blade for dividing concrete ridges, there is a blade support frame, a spherical cumulative layer laid on the bottom of this blade support frame, and a back end surface is placed on this spherical cumulative layer, and the cutting edge is turned outward and played on the open surface of the support frame. A set of blades for splitting concrete protrusions, characterized in that the blades are equipped with a group of divided blades that are fitted into each other, and each blade edge is adapted to the height distortion of the surface of the base material by rolling down the blade edge toward the base material before operation. .