JPH0124606B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a cutting machine for secondary concrete products, particularly for cutting concrete blocks having a relatively large thickness such as brick-like paving blocks. Regarding cutting machines.

(Prior Art) Bricks and concrete blocks for paving often need to be cut into a fraction of the size and laid, depending on the size and shape of the paving surface. The use of this type of divided block is also necessary when utility poles, manholes, and water faucet boxes are installed in paved areas. In such a case,
Generally, it is preferred that the cut surface of the block be perpendicular to its surface.

However, if a curb block is installed continuously between the roadway and the sidewalk along it, the side surface on the roadway side is perpendicular to the top, and the side surface on the sidewalk side is sloped at an obtuse angle with respect to the top. If the block has a surface, in order to match the cut surface of the block with the slope of the curb block, the cut surface of the block must be sloped, and
Its angle of inclination shall be the same as that of the curb block. If this condition is not met, a gap will be created between the curb block and the paving stone block, spoiling the appearance, and it will be necessary to fill the gap with filler, which will have a large impact on the construction period and cost.

As one of the devices for cutting concrete blocks such as paving blocks, there is a cutting machine described in Japanese Utility Model Publication No. 55-37363. This cutting machine is
It includes a frame, an upper blade and a lower blade arranged on the frame at intervals in the vertical direction so that the blade edges face each other, and a drive mechanism that relatively moves the upper blade and the lower blade in the vertical direction, and , with the concrete block placed between the upper and lower blades,
The concrete block is cut by relatively moving the upper and lower blades in the direction in which they approach each other.

However, with conventional concrete block cutting machines, the relative positions of the upper and lower blades in the horizontal direction cannot be changed, so it is difficult to cut the concrete block so that the cutting surface is perpendicular to the surface. Only. For this reason, in the past, in order to provide the divided blocks with inclined surfaces, it was common practice to use a cutting machine to cut the concrete blocks into appropriate sizes, and then peel off the cut surfaces of the cut blocks. I was going to However, this requires complicated on-site work, which causes problems in terms of construction time and costs, even more so than in the case of filling the gaps with filler material as described above.

JP-A-56-44617 discloses an apparatus for cutting a slate plate having a relatively small thickness such that the cut surface thereof is inclined with respect to the surface thereof. This cutting device includes a substrate having a horizontal surface on which a slate board is placed and a vertical surface perpendicular to the horizontal surface, a movable substrate that can be moved relative to the base, and a movable substrate that is attached to the movable substrate via a plurality of springs. and a pressure plate fixed to one end of the movable substrate.

This cutting device places a slate board on the horizontal surface of the board so that one end of the board protrudes from the vertical side of the board, arranges the movable board so that the pressing plate contacts the top surface of the slate board, and By lowering the slate plate, the portion of the slate plate protruding from the substrate is pressed down by the pressure plate, and the slate plate is cut so that the cut surface thereof is inclined with respect to the surface.

However, since the parts of the substrate and pressure plate that contact the slate plate are flat, this cutting device can be applied to cutting concrete plates with small thickness such as slate plates, but it cannot be used for cutting paving blocks. It cannot be applied to cutting concrete blocks with such large thickness dimensions. In addition, by having the movable substrate and the base as independent structures and moving the movable substrate and the base relatively,
Since the structure changes the inclination angle of the cutting surface, it is troublesome to adjust the distance between the substrate and the pressure plate, and when cutting multiple slate plates so that the cut surfaces have the same inclination angle , the distance between the substrate and the pressure plate changes each time it is cut, and the inclination angle of the cut surface becomes irregular.

(Object of the Invention) Therefore, an object of the present invention is to be able to cut a concrete block having a relatively large thickness such as a brick-shaped paving block so that the cut surface is inclined at a predetermined angle, and to To provide a concrete block cutting machine capable of easily changing the inclination angle of a surface.

Another object of the present invention is to provide a concrete block cutting machine equipped with a pedestal that makes it easy to grasp the positional relationship between the block placed on the pedestal and the cutter in order to obtain a cut surface with a desired inclination angle. It's about doing.

Still another object of the present invention is to provide a concrete block cutting machine in which the concrete block is reliably held between the cutting edges of the upper and lower blades during cutting, and the concrete block is reliably cut.

(Structure, operation, and effects of the invention) The concrete block cutting machine according to the present invention has the following features:
a frame including first and second cutter supports spaced apart in the vertical direction, wherein at least one of the first and second cutter supports is movable in the vertical direction relative to the other; first and second blades having cutting edges extending in the direction, the cutting edges extending horizontally in parallel vertical planes and facing inward, independently attached to the first and second cutter supports; moving at least one of the first and second cutter supports relative to the other in order to move the supported first and second blades and the first and second blades toward each other and away from each other; a drive mechanism for driving the first blade to the first or second support portion in order to change the distance between the vertical plane passing through the cutting edge of the first blade and the vertical plane passing through the cutting edge of the second blade; and means for changing the mounting position of the first or second blade.

During cutting, the mounting position of the first or second blade on the first or second support is changed, so that a vertical plane passing through the cutting edge of the first blade and a vertical plane passing through the cutting edge of the second blade are changed. The distance from the surface is adjusted. Then,
A concrete block to be cut is received between the first and second blades, with at least one of the first and second blades being moved towards the other.

As a result, the cutting edges of the first and second blades are pressed against the upper and lower surfaces of the concrete block. As a result, the concrete block is cut diagonally along the plane from the point in contact with the cutting edge of one blade to the point in contact with the cutting edge of the other blade. The upper and lower edges of the cut surface are straight because the cutting edges of the first and second blades are straight.

According to the cutting machine of the present invention, the first and second blades each having a cutting edge extending in one direction are attached to the first and second cutter supports, one of which is vertically movable relative to the other, and the first and second blades each having a cutting edge that is parallel to each other. Since the concrete block is supported so as to extend horizontally in a vertical plane and face inward, it is possible to cut a concrete block having a large thickness so that the cut surface thereof is inclined. In addition, by changing the attachment position of the first or second blade to the first or second support part, the vertical plane passing through the cutting edge of the first blade and the vertical plane passing through the cutting edge of the second blade can be adjusted. Since the interval can be changed, the inclination angle of the cut surface can be easily changed.

The concrete block cutting machine according to the present invention includes:
It also includes a pedestal supported on the second cutter support to receive the concrete block to be cut. The pedestal includes a notch for receiving a portion on the cutting edge side of the second blade, and means for indicating a distance between the edge of the concrete block placed on the pedestal and the cutting edge of the second blade. Equipped with This allows the concrete block to be placed on the pedestal in line with the display means.

Therefore, according to the cutting machine of the present invention, also:
It is easy to grasp the positional relationship between the concrete block and the second blade, and the block can be accurately placed on the pedestal.

The concrete block cutting machine according to the present invention includes:
It further includes a pedestal arranged to receive the concrete block to be cut. The pedestal has a notch for receiving a portion on the cutting edge side of the second blade, and is supported by the second cutter support portion via a plurality of shock absorbers. During cutting, when the first and second cutter supports are further moved relative to each other while the concrete block is in contact with the cutting edge of the first blade and the pedestal, the force pushing down the pedestal is absorbed. Acting on the pedestal, the buffer is compressed and the pedestal is moved downwardly relative to the second blade.

Therefore, according to the cutting machine of the present invention, the concrete block can be reliably held between the cutting edges of the first and second blades and reliably cut.

(Example) As shown in FIGS. 1 and 2, a concrete block cutting machine 10 includes a frame 12. As shown in FIGS.
The frame 12 includes a base 18 consisting of an annular member 14 and a base 16 welded to the inside thereof.
At two locations separated in the diametrical direction of the annular member 14, there is a pair of guides 2 extending upwardly in parallel.
0 is welded. In the illustrated example, the guide 20 is made of a steel material having a U-shaped cross-section, such as channel steel, and is arranged so that the grooves thereof face each other. A first cutter support section 22 is fixedly provided at the upper end of the guide 20.

As shown in FIG. 4, the first cutter support section 22 includes an annular member 24 fixed to the guide 20, and a support member disposed inside the annular member and fixed to the annular member and the guide member 20. 26, and a connecting member 28 that fixedly connects the annular member 24 and the support member 26 to each other. Elongated holes 30 are formed at a plurality of locations spaced apart in the diametrical direction of the annular member 24 of the support member 26, respectively. Each elongated hole 30 extends parallel to each other in a direction perpendicular to the arrangement direction thereof. A plurality of bolts 32 passing through each elongated hole 30 from above to below are arranged, and a plate-shaped upper blade 34 is removably attached to the lower side of the support member 26 by means of a plurality of bolts 32.

The frame 12 also includes a second cutter support 36 that is movable up and down along the guide 20.
As shown in FIGS. 3 and 5, the second cutter support portion 36 includes a support member 40 having a rectangular planar shape for the lower blade 38, and extends horizontally from the support member 40 into the groove portion of the guide 20. and a slidably received protrusion 42.

A pair of fixtures 44 are provided on the upper surface of the support member 40.
The lower blade 38 is removably attached by a plurality of bolts 46 passing through the fixture and nuts 48 screwed into the bolts. Lower blade 38
are arranged along a line passing through the center of the annular member 24 and extending in the direction in which the elongated holes 30 are arranged, and thus extending parallel to the upper blade 34.

The relative position of the upper blade 34 and the lower blade 38 in the horizontal direction, in other words, as shown in FIG.
The distance E between the vertical plane 66 passing through the cutting edge 34a of the lower blade 38 and the vertical plane 68 passing through the cutting edge 38a of the lower blade 38 can be adjusted by changing the attachment position of the upper blade 34 to the support member 24 with the bolt 32. 66,68
Adjustment can be made within the range defined by the length dimension of the elongated hole 30 from the position where they match. Therefore, the elongated hole 30 crosses the vertical surface 68 and
It extends in the direction perpendicular to 8.

When adjusting the distance E, when the bolt 32 is brought into contact with one longitudinal edge 30a of the elongated hole 30 and the upper blade 34 is attached to the support member 26 by the bolt 32, the vertical surfaces 66 and 68 are aligned. On the other hand, bolt 3
2 to the left in Fig. 3 and bolt 32.
is placed at another position in the elongated hole 30 and the upper blade 34 is attached to the support member 26 at that position, the vertical plane 6
6 and 68 can be separated in the longitudinal direction of the elongated hole 30. Therefore, it is easy to change the attachment position of the upper blade 34 to the support member 26, and also to change the distance E.

Note that the elongated hole 30 may be a hole that can separate the vertical surface 66 to the right of the vertical surface 68 in FIG. It may be a hole that can be separated.

A plurality of buffers 50 are provided around the lower blade 38 on the upper surface of the second cutter support portion 36, and a pedestal 52 is attached to the upper surface of the buffers 50. As shown in FIGS. 3 and 6, the pedestal 52 is provided with a notch 54 for receiving the cutting edge 38a of the lower blade 38, and the upper surface of the pedestal 52 is provided with a notch 54 for receiving the cutting edge 38a of the lower blade 38. A plurality of scales 58 are provided to indicate the distance between the end of the block 56 and the cutting edge 38a of the lower blade 38. Scale 58
In the illustrated example, the groove is a groove having a V-shaped cross section provided in the pedestal 52, but it may be other means such as a line. Further, the scale 58 may indicate the distance between the end of the block 56 and the cutting edge 34a of the upper blade 34. Furthermore, in addition to the scale 58, the pedestal 52 includes an upper blade or a lower blade 3 from the scale.
Numbers indicating the distances to the cutting edges 34a, 38a may be provided.

The cutting machine 10 is also arranged between the base 18 and the second cutter support 36 to move the second cutter support 36 up and down along the guide 20, as shown in FIGS. a hydraulic device 60,
It includes a plurality of springs 62 that press the second cutter support part 36 toward the hydraulic device 60. Hydraulic device 60
is a hydraulic jack that is installed on the base 16 and whose ram is moved relative to the cylinder by operating a handle 64 in the illustrated example. The spring 62 is a tension coil spring whose one end is locked to the base 18 and the other end is locked to the second cutter support part 36.

Note that instead of having a structure in which the lower blade 38 is moved relative to the upper blade 34, the first cutter support part 22 is arranged so as to be movable up and down along the guide 20, and the second cutter support part 38 is moved along the guide part 20. The structure may be such that the upper blade 34 is moved relative to the lower blade 38 by moving the first cutter support part 20 up and down using the hydraulic device 60. , 36 may be relatively moved by a common or separate hydraulic device to relatively move the upper blade 34 and the lower blade 38.

In use, block 56 is placed in position on cradle 52, as shown in FIGS. 2 and 3. At this time, the cutting machine 10 has a scale 58 on the pedestal 52.
Since the block 56 is provided with the first and lower blades 3
2, 34 can be placed in the correct position.

As shown in FIG.
When the block 56 is placed in a predetermined position, the handle 64 is operated to raise the second cutter support part 36 by the hydraulic device 60, and the block 56 is moved together with the lower blade 38 toward the upper blade 34. .

After the upper surface of the block 56 comes into contact with the cutting edge 34a of the upper blade 34, the handle 64 is further operated to remove the second blade.
When the cutter support part 36 of the block 5 is raised, the block 5
6 is pressed with its upper surface against the cutting edge 34a of the upper blade 34 while its lower surface is in contact with the cutting edge 38a of the lower blade 38. As a result, the block 56 moves the upper blade 34
The lower blade 38 starts from the point 56a that contacts the cutting edge 34a of the lower blade 38.
A scratch is formed at a location 56b that contacts the cutting edge 38a, and the cut is made along a surface that goes from the contact location 56a to the contact location 56b or vice versa. On this occasion,
The scratches formed on the block 56 are caused by the cutting edges 34a and 38.
Since the cut surface of the block 56 is a straight line along the line a, the edge of the cut surface of the block 56 is a substantially straight line along the contact points 56a and 56b.

When the second cutter support part 36 is further raised with the upper surface of the block 56 in contact with the cutting edge 34a of the upper blade 34, a force pushing down the pedestal 52 acts on the pedestal 52, and the buffer 50 is compressed. and pedestal 5
2 is moved downward relative to the lower blade 38. Therefore, the block 56 is reliably held between the cutting edge 38a of the lower blade 38 and the cutting edge 34a of the upper blade 34, and is reliably cut.

During cutting, as shown in FIG.
If there is no interval E between the block 56 and the vertical plane 68 passing through a, that is, if the vertical planes 66 and 68 are coincident, the line connecting the point 56a and the point 56b will be perpendicular to the top and bottom surfaces of the block 56. Since it stretches, block 56 is cut along a plane that is generally perpendicular to the top and bottom surfaces. On the other hand, when the distance E is present, the line connecting the portion 56a and the portion 56b of the block 56 is inclined with respect to the upper and lower surfaces of the block 56, so that the block 56 is cut diagonally as shown in FIG. Ru.

The inclination angle of the cut surface of the block 56 is
By adjusting the interval E between 6 and 68, it can be set to an arbitrary value. In this case, since the attachment position of the upper blade 34 to the support member 26 may be changed, the adjustment work of the distance E between the vertical surfaces 66 and 68 becomes easy.

[Brief explanation of drawings]

Fig. 1 is a front view showing an embodiment of a concrete block cutting machine according to the present invention, Fig. 2 is a right side view of the cutting machine, and Fig. 3 is taken along line 3-3 in Fig. 1. 4 is a plan view of the cutting machine, FIG. 5 is a sectional view taken along line 5-5 in FIG. 1, and FIG. 6 is a sectional view taken along line 6-6 in FIG. 1. The resulting sectional view, FIG. 7, is a perspective view of the cut concrete block. 10: cutting machine, 12: frame, 18: base,
20: Guide, 22: First cutter support part, 3
0: Long hole, 32: Bolt, 34: Upper blade, 34a:
Cutting edge of upper blade, 36: Second cutter support part, 38:
Lower blade, 38a: Lower blade edge, 50: Buffer, 5
2: pedestal, 54: notch, 56: concrete block, 58: scale, 60: hydraulic device, 66,6
8: Vertical surface.

Claims (1)

[Scope of Claims] 1. A frame comprising first and second cutter support parts spaced apart in the vertical direction, wherein the first
and a frame in which at least one of the second cutter support parts is movable in the vertical direction relative to the other, and first and second blades having cutting edges extending in one direction, the cutting edges being horizontal in a parallel vertical plane. first and second cutter supports independently supported by the first and second cutter supports so as to extend in the direction and to face inward;
blades, and the first and second blades to move the first and second blades in a direction in which they move toward each other and move away from each other.
a drive mechanism for moving at least one of the cutter support parts relative to the other; and a drive mechanism for changing the distance between the vertical plane passing through the cutting edge of the first blade and the vertical plane passing through the cutting edge of the second blade. and means for changing the attachment position of the first or second blade to the first or second support. 2. A concrete block cutting machine according to claim 2, wherein said changing means comprises a plurality of bolts for removably attaching said first blade to said first cutter support. 3. A frame including first and second cutter supports spaced apart in the vertical direction,
and a frame in which at least one of the second cutter support parts is movable in the vertical direction relative to the other, and first and second blades having cutting edges extending in one direction, the cutting edges being horizontal in a parallel vertical plane. first and second cutter supports independently supported by the first and second cutter supports so as to extend in the direction and to face inward;
blades, and the first and second blades to move the first and second blades in a direction in which they move toward each other and move away from each other.
a drive mechanism for moving at least one of the cutter support parts relative to the other; and a drive mechanism for changing the distance between the vertical plane passing through the cutting edge of the first blade and the vertical plane passing through the cutting edge of the second blade. means for changing the attachment position of the first or second blade to the first or second support; and a pedestal supported by the second cutter support to receive a concrete block to be cut. The pedestal includes a notch for receiving a portion on the cutting edge side of the second blade, and a gap between the edge of the concrete block placed on the pedestal and the cutting edge of the second blade. and a means for displaying the distance of the concrete block cutting machine. 4 A frame including first and second cutter support parts spaced apart in the vertical direction,
and a frame in which at least one of the second cutter support parts is movable in the vertical direction relative to the other, and first and second blades having cutting edges extending in one direction, the cutting edges being horizontal in a parallel vertical plane. first and second cutter supports independently supported by the first and second cutter supports so as to extend in the direction and to face inward;
a drive mechanism that moves at least one of the first and second cutter supports relative to the other so as to move the first and second blades in a direction in which the first and second blades move toward each other and move away from each other; The first or second blade is attached to the first or second cutter support to change the distance between the vertical plane passing through the cutting edge of the blade and the vertical plane passing through the cutting edge of the second blade. and a cradle arranged to receive a concrete block to be cut, the pedestal having a notch for receiving a portion on the cutting edge side of the second blade, and , a concrete block cutting machine supported on the second cutter support via a plurality of shock absorbers.