JPH0414167Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a cutter device equipped with a disc-shaped blade used for cutting concrete and the like.

[Conventional technology]

Conventionally, diamond chips have been used to cut humid pipes, secondary concrete products, tiles, bricks, etc., or to form through holes (openings) in concrete walls for air-conditioning duct construction, cable construction, etc. A cutter device is used which has a structure in which a disk-shaped blade provided with a blade is rotated by a prime mover such as an electric motor or an engine, and cooling water is sprayed onto the blade.

[The problem that the idea aims to solve]

However, conventional cutter devices are generally equipped with a safety cover that partially covers the blade for safety during cutting operations, and the blade is either directly connected to the output shaft of the electric motor or equipped with an appropriate speed reduction mechanism. The structure is such that it is attached to the output shaft of the

For this reason, the output shaft becomes a hindrance during actual cutting work, and only about 1/3 of the diameter of the blade can penetrate into the concrete. In other words, when cutting a concrete plate, for example, the concrete plate cannot be cut unless a blade having a diameter approximately three times the thickness of the concrete is used.

Therefore, in the conventional cutter device, it was necessary to prepare blades with different diameters depending on the thickness of the concrete plate to be cut, and to select an appropriate blade from among these for use. For this reason, the number of blades increases, and in particular, as the diameter of the blade increases, the rotational power also increases, requiring a large prime mover, which is disadvantageous in terms of transportation and movement, and reduces work efficiency when the cutting work site is small. Unfortunately, there was a problem that increased the danger of the work. In addition, uncut or extra cuts were left in the cut, making it impossible to finish the cut in a straight line, which required repair work.

[Means to solve the problem]

The object of the present invention is to provide a cutter device that can accurately solve the above-mentioned problems of conventional devices.

That is, the cutter device of the present invention is a cutter device in which a disc-shaped blade is rotatably provided by a prime mover provided on a frame, and has a casing that is attached at one end to the frame and rotatably supports a rotating shaft at the other end. The output shaft of the prime mover and the rotary shaft are connected by a rotary transmission member, and the rotary transmitter is housed and arranged in the casing, and the both end surfaces and blades are provided at both axial ends of the rotary shaft. The blades are arranged to face each other in parallel so that their outer surfaces substantially coincide with each other, and the casing is inserted and arranged between the two blades, and the casing is composed of two cases having a U-shaped flange portion. A cooling water introduction groove that can communicate with a cooling water supply source is formed in the flange part of one case, and a cooling water outflow hole is formed in the part of the cooling water introduction groove facing the blade, and the other case has a cooling water inlet groove connected to the cooling water supply source. The flange portion of the case is characterized in that cooling water outflow holes communicating with the cooling water introduction grooves are formed respectively.

[Effect]

In this cutter device, when cooling water is started to be introduced into the cooling water introduction groove of the casing and the prime mover is started, the rotation of the output shaft of the prime mover is transmitted to the rotary shaft via the rotary transmission member and the blades are rotated. , parallel cutting grooves are formed on the surface to be cut.

Since the blade is provided so that its outer surface and both axial end surfaces of the rotating shaft substantially coincide with each other, and the casing is inserted between the two blades, the cutting operation can be continued. When inserting the blade into the surface to be cut, there are no obstacles protruding from the outer surface of the blade.
It is possible to cut to the opposite side of the workpiece regardless of its thickness. In this case, the plate-shaped remains of the workpiece formed between the cutting grooves become an obstacle and make it impossible to proceed with the cutting, but when the interval between the cutting grooves is small, it is crushed and removed by vibration etc.
If the gap is large, the cutting can be continued and completed by stopping the cutting, removing the debris by other means, starting the cutting again, and repeating this process.

Then, the cooling water flows through the cooling water introduction groove,
Since the cooling water is injected from the cooling water outflow holes formed in the two opposing cases onto the opposing surfaces of each blade, these blades (and the blades provided thereon) can be cooled extremely efficiently. .

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

This cutter device is for cutting concrete floors and walls, and is roughly divided into a drive device 1 consisting of an electric motor 2 installed on a frame, a reduction gear 3 directly connected to this electric motor 2, and a drive device 1 consisting of a reduction gear 3 directly connected to the electric motor 2. A casing 11 and a cutter body 21 that are fixedly installed and extend in the vertical direction, an elevating device 31 for raising and lowering the driving device 1, the casing 11, and the cutter main body 21 integrally, and a movable base for supporting the elevating device 31. 41, and a rail 51 for reciprocating the movable base 41 along the installation surface of the cutter device.

The cutter body 21 has a rotating shaft 14 with a short shaft length.
Disk-shaped blades 22, 22 are fixed to both ends of the rotating shaft 14 in the axial direction by hexagon socket head bolts 23 (see FIG. 6), and blades 22, 22, which are fixedly provided at the center of the rotating shaft 14 in the axial direction, are described later. The driven sprocket ₁₄₃ is configured to include a driven side sprocket 143.

The blades 22, 22 have the same specifications such as diameter and wall thickness, and are arranged parallel to each other and facing each other so that their respective centers substantially coincide with each other. Each of these blades 22, 22 has a plurality of annular through-holes 22 ₁ for supplying cooling water formed around the center thereof, and a cutting portion 22 ₂ (bit) made of a diamond chip is provided at the outer edge.
A gap d (distance between the inner surfaces) is formed between the facing sections of the blade parts 22 ₂ and 22 ₂ , and a gap D between the outer surfaces of the blades is formed.
is equal to the axial length of the rotating shaft 14 (both axial end surfaces of the rotating shaft 14 and the outer surface of the blade coincide).

The casing 11 has an outer case 11 ₁ and an inner case 11 ₂ (the case closer to the reducer 3), each having U-shaped flanges 11a and 11b finished on sliding surfaces, without intervening a gasket. Direct face-to-face polymerization, multiple bolts 13
b, 13b..., and is fixed to the reducer 3 with a plurality of bolts 13a, 13a..., and inside thereof, in order from the top to the bottom, a drive side sprocket 14 ₁ and an idle sprocket are installed. 14 ₂ and driven side sprockets 14 ₃ are arranged in multiple stages. Furthermore, small anti-sag sprockets 17 _{1 and} 17 2 are provided at intermediate positions between the driving side sprocket 14 ₁ and the idle sprocket 14 ₂ and between the sprocket 14 ₂ and the driven side sprocket 14 ₃ , respectively. An endless chain 18 is attached to the five sprockets so as to be able to circulate.

Then, the flange portion 11a of the outer case ₁₁₁
A cooling water introduction groove 71 is formed in the vertical direction, and its upper end communicates with the water supply nozzle 72, and its lower end ends within the flange portion 11a. Blade 22
A plurality of cooling water outflow holes 73 ₁ are bored in the opposing part,
A cooling water outflow hole 73 2 is also formed in the flange portion 11b of the inner case 11 ₂ at a position facing the cooling water outflow hole _{73 1 .}

Width W of the casing 11 (the casing 11
The width and thickness (dimensions in the direction perpendicular to the longitudinal direction and in the diametrical direction of the blade 22) are smaller than the diameter of the blade 22, and the width and thickness (dimensions in the thickness direction of the blade 22) are uniform over the entire casing 11. In addition, the cutter body 2 of the casing 11
The part on the first side is inserted between the blades 22 and 22.

Thus, the drive side sprocket 14 ₁ includes bearings 16 ₁ , 16 ₄ and bearing support members 15 ₁ , 15 ₄ .
The idle sprocket 14 ₂ is supported by the casing 11 via the casing 11 and is fitted and connected to one end of the output shaft 3 a of the reduction gear 3, and the idle sprocket 14 2 is connected to the bearings 16 ₂ , 16 ₅ and the bearing support member 15 ₂ , The driven side sprocket 14 ₃ is connected to the bearing 1 via the bearing 15 ₅ .
6 ₃ , 16 ₆ and bearing support members 15 ₃ , 15 ₆ , and are supported by the casing 11, respectively.
Note that the one end portion of the output shaft 3a is supported by the casing 11 via a bearing 3b and a bearing support member 3c.

As is clear from the above explanation, casing 1
Reference numeral 1 also serves as a safety bar of a rotation transmission member for rotating the blade 22, and the lower part of the casing 11 is inserted between two blades.

On the other hand, the elevating device 31 includes a cylindrical support 32 projecting from a movable base 41, a drive device 1, a casing 1, and a cylindrical support 32 that is slidably mounted on the support 32.
1 and the cutter body 21 integrally, and this support member 33 is connected to the support column 3.
a lifting rod 34 for sliding up and down along 2;
It is configured to include an elevating handle 35 for rotating the elevating rod 34 and the like.

There is a rack (not shown) on the upper surface of the rail 51.
However, a pinion (not shown) with a handle is provided on the lower surface of the movable base 41 to engage with the rack, and by rotating this pinion via the handle, the movable base 41,
Therefore, the cutter body 21 can be moved to any position in the longitudinal direction of the rail 51. Further, a fixing bolt (not shown) with a handle is provided on the side surface of the movable base 41, and the movable base 41 can be fixed to the rail 51 by tightening by rotating the handle. Furthermore, rails 5 are provided on both inner sides of the movable base 41.
A guide roll (not shown) is provided that rolls on the side surface of the cutter 1, and this guide roll also has the function of supporting the weight of the cutter device on the rail. The support member 33 is provided with a clamp (not shown) that can fix the support member 33 to the support column 32 at any position on the support column 32.

In the figure, 17 is a sealing member for preventing foreign matter from entering the casing 11. 19 ₁ ,
19 ₂ is an arm provided on the anti-sagging sprockets 17 ₁ , 17 ₂ , which enters deep inside the casing 11 by screwing in a bolt 62 screwed into a bracket 61 fixed to the outer case 11 ₁ , and locks the chain 18 The degree of slack can be adjusted. Reference numeral 81 denotes a reinforcing frame that is fixed across the support column 32 and the movable base 41.

The diameter of each blade 22 is set to 320 mm, the distance d is set to 20 mm, and the total length/width/thickness of the casing 11 is set to 580 mm/160 mm/15 mm, but depending on the thickness of the object to be cut, etc. It can be changed to an appropriate value taking into consideration.

Next, to explain the operation of the above embodiment device, the cutter device is installed on the floor of a construction site, and the cutter body 21 is moved by moving the movable base 41.
is moved to the predetermined position where it is to be cut, and then the movable base 41 and therefore the support column 32 are fixed to the rail 51 by operating the fixing bolt and set in the state shown in FIG. 1, and the water supply nozzle 72 is A water supply pipe (not shown) connected to an appropriate cooling water supply source and provided with a flow rate control valve is connected to the casing 11.
Start supplying pressurized cooling water to the inside. Next, the electric motor 2 is activated and the lifting handle 35 is operated to gradually lower the support member 33 and therefore the cutter body 21. As a result, the rotational power of the electric motor 2 is transferred to the driven sprocket 14 ₃ via the reducer 3, the driving sprocket 14 ₁ , and the chain 18.
The blades 22 are rotated, and the blade portions 22 ₂ of each blade come into contact with the concrete surface and the cutting operation begins.

Thus, the cooling water supplied into the casing ₁₁ flows through the cooling water introduction groove ₇₁ , and as shown in FIG. The cooling water flows into the cooling water outlet hole _{73 2 formed} in the outer case ₁₁ , and the water flowing out from the outlet hole 73 2 flows into the blade 22 facing the outer case 11 ₁ , while the water flowing out from the outlet hole 73 ₂ flows into the inner case. 11 ₂ is jetted against the blade 22 surface facing the blade 2, but some of these jetted water collides with the blade surface, and the rest is sprayed onto the blade 22.
Since the blades 22 are _rotating , both sides of each blade 22 are evenly cooled, and the cooling water finally reaches the concrete surface near each blade. Fall.

By the way, it is extremely difficult to arrange the two blades completely parallel to each other in the cutter body 21 and to make the distance d uniform over the entire blade, and since the vibration from the electric motor 2 is transmitted, the blade During the rotation of the blade 22, it is inevitable that the diamond chip is subjected to some vibration and impact force in directions perpendicular to and parallel to the blade surface. Therefore, in this cutting operation, initially only cutting grooves that correspond to the chips and are approximately parallel to each other are formed, but when the cutter body 21 descends and the chips penetrate deep into the concrete, it becomes very convenient. In particular, the plate-shaped concrete residue that exists between the two grooves is thin, about 15 mm thick, and is brittle, so it is crushed by the vibration and impact force of the chips. Concrete is removed by rotating the chips.
scraped onto the top surface.

Moreover, the casing 11 has a structure in which it is inserted between two blades, and the cutter body 2
1, there is no part that protrudes outward from the outer surface of each blade, so the entire blade 22 is made of concrete.
In particular, when the shape and dimensions of the entire casing 11 are made equal to that of the portion inserted into the cutter body as shown in FIG. It is also possible to penetrate the longitudinal center portion below the concrete surface.

In other words, this cutter device can cut a concrete plate with a depth approximately equal to the distance between the lower end surface of the reduction gear 3 and the lower end surface of the blade portion ₂₂₂ . Specifically, while the conventional device was only able to cut concrete with a thickness of approximately 1/3 of the blade diameter, the device of this embodiment could cut concrete approximately twice the blade diameter. It has the advantage of being able to cut materials with a thickness of
It is also easy to further increase the cutting depth by extending the casing length or making the reducer 3 smaller.

In addition, in the case of forming a cut surface having a width larger than the blade diameter, the blade may be removed from the surface to be cut, moved an appropriate distance along the cut surface, and the above-mentioned cutting operation may be repeated.

Further, as described above, the configuration is such that cooling water is supplied to each blade surface from between the mutually opposing blade surfaces, and a through hole 22 ₁ for supplying cooling water is formed in each blade surface. Therefore, cooling water is evenly supplied to both surfaces of each blade, and cooling water is also supplied to the concrete cutting groove and its surroundings. Therefore, not only can each blade be efficiently cooled with a small amount of cooling water, but also the blade portion can be sufficiently cooled by the cooling water supplied to the cutting groove.

Therefore, in order to be able to perform the cutting and crushing and scraping of the plate-like residue in parallel during the concrete material cutting work, it was necessary to use the results of cutting experiments conducted by the present inventor and the ease of manufacturing the cutter body. According to the results of studies regarding the distance d, it is preferable that the distance d is approximately in the range of 10 mm to 30 mm, although there are differences depending on the properties of the concrete material. The reason for this is that within this range, when cutting concrete material, the plate-shaped remains of concrete will be automatically crushed and scraped out, so the cutting process will proceed extremely quickly, but if the material is larger than 30 mm, In this case, although it becomes easier to manufacture the rotating shaft 14, bearings 16 ₃ , 16 ₆ and casing 11, etc., the thickness of the plate-like remains becomes large, so the crushing and scraping effect described above becomes insufficient, and in this case, This is because it is necessary to repeat the process of once removing the blade from the concrete surface, crushing and scraping using appropriate means, and restarting cutting.If the blade is smaller than 10 mm, the opposite result will occur. This is because.

In the illustrated example, one blade is provided on each side of the casing 11, but the rotating shaft 14 of the driven sprocket ₁₄₃ is extended to the left and right sides in FIG.
One or more blades may be fixed at an appropriate distance from the nearest blade. Even when two or more blades are fixedly installed, it is preferable to provide these blades with appropriate spacing.

Further, instead of the rotational transmission mechanism using a chain, a mechanism using gears can be used.

[Effect of idea]

As described above, in the device of the present invention, the blades are arranged parallel to each other at both ends of the rotating shaft in the axial direction so that the end surfaces and the outer surfaces of the blades substantially coincide with each other, and the casing is attached to both the blades. By inserting and deploying the blade in the gap, cutting can be continued until the blade reaches the opposite surface on the back side with the entire blade intruding into the surface to be cut, regardless of the thickness of the object to be cut, i.e. One type of blade can cut walls of different thicknesses, and the required horsepower is small, allowing the entire device to be miniaturized. Furthermore, the cuts can be finished with accurate straight lines, making it possible to open a straight hole in the wall surface without creating unnecessary cuts or uncut holes.In addition, a cooling water supply path is provided in the casing, and the cooling water supply path is provided inside the casing. By forming cooling water outflow holes on each blade, both blades (and their cutting edges) can be cooled extremely efficiently, greatly extending the life of the blades, and the cooling water supply pipe is not exposed around the cutter body. The structure of the cutter body is simple so that it does not get in the way.
This provides a practical benefit in that it can accurately solve the problems of the conventional device described above.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a front view, Fig. 2 is a left side view, Fig. 3 is a front sectional view of the casing, Fig. 4 is a front view of the outer case, and Fig. 5 is a front view. is a front view of the inner case, and FIG. 6 shows the through hole 22 ₁ of the blade and the cooling water outflow hole 7 of the casing 11.
An explanatory diagram of the positional relationship with 3 ₁ and 73 ₂ , Figure 7 is the 2nd
Figure - sectional view. _DESCRIPTION OF _{SYMBOLS 1... Drive device, 2... Electric motor, 3... Speed reducer, 3a... Output shaft, 3b, 161-166...Bearing, 3c, 151-156 ... Bearing} support member, 11
...Casing, 11 ₁ ...Outer case, 11 ₂ ...
...Inner case, 11a, 11b...flange part,
13a, 13b, 62... Bolt, 14... Rotating shaft, 14 ₁ ... Drive side sprocket, 14 ₂ ... Idle sprocket, 14 ₃ ... Driven side sprocket, 17... Seal member, 17 ₁ , 17 ₂ ...Sag prevention sprocket, 18...Chain, 19
₁ , 19 ₂ ... Arm, 21 ... Cutter body, 2
2... Blade, 22 ₁ ... Through hole, 22 ₂ ... Blade portion, 23... Hexagon socket head bolt, 31... Elevating device, 32... Support column, 33... Support member, 34...
Lifting rod, 35... Lifting handle, 41... Movable base, 51... Rail, 61... Bracket, 7
1...Cooling water introduction groove, 72...Water supply nozzle, 73
_{1,73 2} ...Cooling water outflow hole, 81...Reinforcing frame, d...Distance, D...Distance, W...Width.

Claims (1)

[Claims for Utility Model Registration] (1) A cutter device in which a disk-shaped blade is rotatably provided by a prime mover provided on a frame, one end of which is attached to the frame and a rotating shaft rotatably attached to the other end. A supported casing is provided, the output shaft of the prime mover and the rotational shaft are connected by a rotational transmission member, and the rotational transmission member is housed and arranged in the casing, and the rotational transmission member is provided at both axial ends of the rotational shaft. The blades are arranged to face each other in parallel so that the surface portion and the outer surface of the blade substantially coincide with each other, and the casing is inserted and arranged between the two blades, and the casing has a U-shaped flange portion. The flange of one case is formed with a cooling water introduction groove that can communicate with the cooling water supply source, and the cooling water outflow hole is formed in the part facing the blade of the cooling water introduction groove. A cutter device characterized in that the flange portion of the other case is provided with a cooling water outflow hole communicating with the cooling water introduction groove. (2) The cutting edge of the blade is a diamond chip, and the gap between the opposing surfaces of the diamond chip is
The cutter device according to claim 1, wherein the cutter device is set within the range of 10 mm to 30 mm.