JPH0138203Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a concrete cutter for floor lifting using an expansive breaking agent.

In recent years, when the concrete surface is damaged, such as on the floor of a chemical factory or food factory, a number of grooves are formed in parallel at regular intervals in the existing concrete floor, and brittle objects can be broken into the grooves. A chiseling method has been developed in which concrete is filled with an expansible destructuring agent and the volumetric expansion of the expansible destructible agent caused by hydration and digestion is used to chisel concrete.

In this chiseling method, it is essential to form a large number of grooves in the concrete floor with a depth corresponding to the depth of the chisel and arranged parallel to each other. The width needs to be constant, and depending on the performance of the expansible rupture agent used, the width is usually 3 to 6 mm (unit: mm, the same applies hereinafter), the interval is 40 to 140 mm, and the depth is 30 to 80 mm. It is necessary that the groove is of a certain degree.

Conventionally, there is a concrete cutter that can be used for this kind of purpose, which cuts the road surface while the trolley is running, but the only one that can be used for cutting grooves of about 4 mm, which is used in the above-mentioned chiseling method, is a concrete cutter. Most of the blades are used (for example, Utility Model Application No. 10907/1983), and these are intended for cutting the road surface, and are suitable for forming grooves of a certain width at equal intervals. It was something other than that. There are also cutters that cut the road surface with multiple rotating blades (for example, Utility Model Application No. 57-60946), but this type of cutter is for cutting the road surface to a certain depth, and after cutting the groove, a shovel etc. is used. The remaining part was then scraped off, so it could not be used for the above-mentioned hanging method.

In view of the above-mentioned conventional problems, the present invention has developed a floor using an expansive destructive agent that is suitable for the above-mentioned chisel construction method and is capable of forming a large number of narrow grooves of a constant depth at regular intervals. The purpose of this invention is to provide a concrete cutter for chiseling.

The gist of the present invention to achieve such an object is that a frame that is equipped with a traveling means and can move freely is equipped with a high-speed rotating shaft, and a plurality of cutting machines are installed at regular intervals on the high-speed rotating shaft. In addition to attaching the blade, the pedestal is provided with guide rollers that are located outside both ends of the blade and can roll freely by fitting into the previously cut grooves, and the pedestal is moved along the previously cut grooves. There is a concrete cutter for lifting a floor using an expansible destructive agent which is capable of forming a plurality of parallel grooves at regular intervals on the running surface by the cutting blade.

Next, an example of implementation of the present invention will be described in detail with reference to the drawings.

In the figure, 1 is a pedestal. This frame 1 consists of a horizontal frame 1a and a vertical frame 1b erected on the upper surface of the rear end, and a pair of rear wheels 2 are fixed to both ends of an axle 2a on the lower surface of the rear end of the horizontal frame 1a. A sprocket 3 is fixed to the axle 2a. On the other hand, a manual shaft 4 is horizontally suspended on the vertical frame 1b, and its both ends protrude from both outer surfaces of the vertical frame 1b, and a handle 5 is attached to the projecting end. Sprocket 3 of the aforementioned axle 2a
Chain 7 is passed around. By manually rotating the handle 5, driving force can be applied to the rear wheels 2.

A front wheel 8 is provided on the bottom surface of the horizontal frame 1a at a position slightly forward of the center thereof so as to be able to approach and move away from the horizontal frame 1a. That is, the front wheel 8 has a substantially central portion supported via a shaft 10 on the front end of a rotating frame 9 that is pivotally supported on the bottom surface of the horizontal frame 1a.
The lower end of the internally threaded cylinder 11 that protrudes inward is pivotally attached,
A male threaded shaft 12 is screwed into the female threaded cylinder 11. The male threaded shaft 12 is supported at the upper end of the vertical frame 1b by a bearing 13 so as to be immovable and rotatable in the axial direction, and a handle 14 is fixed to the upper end thereof. However, due to the rotation of the handle 14, the male threaded shaft 12 is inserted into the female threaded cylinder 1.
1 is pushed out or pulled up, thereby rotating the rotating frame 9 around the shaft 9a,
The front wheel 8 at the tip is operated.
By the operation of this front wheel 8, the horizontal frame 1
The front end side of a can be moved up and down.

A plurality of cutting blades 15, 15, . . . are provided at the front end of the horizontal frame 1a. These cutting blades 15, 15, . 15...
A cutting blade cover 18 is provided to cover the upper part of....

Inside the cutting blade cover 18 is a water supply pipe 1.
9 is inserted, and the water injection nozzles 20, 20 branched from the water supply pipe 19 are connected to each cutting blade 15,
Water in a water tank 21 provided on the cutting blade cover 18 is supplied to the cutting blades 15, 15, . . . through a pipe 19.

An internal combustion engine 2 for rotating the cutting blades 15, 15, .
2 is installed, and the V fixed to its rotating shaft
A V-belt 24 is stretched between the pulley and a V-pulley 23 fixed to the protruding end of the high-speed rotating shaft 17 described above, so that rotation is transmitted.

Furthermore, gantry traveling guides 25, 25 are provided at the front and rear ends of the horizontal frame 1a. This traveling guide 25 includes a shaft 27 horizontally mounted on brackets 26, 26 protruding from the horizontal frame 1a, and the shaft 27.
Arms 28, 28 for attaching guide rollers rotatably supported at both ends of 7, and the arms 2
The guide rollers 29 and 29 are rotatably supported at the tips of the rollers 8 and 28. Each of the guide rollers 29 has a tapered peripheral edge and has a thickness that allows it to fit into the groove a formed by the cutting blade 15 and roll, and urges the arm 28 in a downward direction. It is pulled into the groove a by a spring 30. Further, the guide roller 29 is installed at a position where it rolls at a position apart from the cutting blade 15 at the end by the distance between each cutting blade 15, 15, thereby forming a groove formed earlier and a groove formed later. Make sure the distance between the grooves is the same.

In addition, numeral 31 in the figure is a cutting depth gauge, and a roller 34 that rolls on the floor surface is rotatably attached to the lower end of a shaft 33 that is inserted into a guide tube 32 so as to be vertically movable. 35 can be read with a gauge 36 on the side of the water tank.

The concrete cutter for floor lifting of the present invention is constructed as described above, and a plurality of cutting blades are attached to a high-speed rotating shaft provided on a pedestal, and by moving the floor surface, a plurality of grooves of a constant width can be cut. The grooves can be formed at regular intervals at the same time, and by having a guide roller that fits into the previously cut area and can roll freely, all the grooves formed on the floor surface can be formed at the same interval. Therefore, a floor that requires grooves of a constant width and at regular intervals and is filled with an expansive destructive agent and the concrete between the grooves is removed has become suitable for forming grooves for hanging.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional side view showing an embodiment of the concrete cutter of the present invention, and Fig. 2 is a - in Fig. 1.
3 is a sectional view along the same line, and FIG. 4 is a partial front view. 1... Frame, 1a... Horizontal frame, 1b...
Vertical frame, 2... Rear wheel, 8... Front wheel, 15...
...Cutting blade, 17...High speed rotating shaft, 18...
Cutting blade cover, 19...Water supply pipe, 20
...Water injection nozzle, 21...Water supply tank, 25...
Frame traveling guide, 29...Guide roller.

Claims (1)

[Scope of utility model registration request] A high-speed rotating shaft is provided on a frame that is equipped with a traveling means and can be freely moved, and a plurality of cutting blades are attached to the high-speed rotating shaft at regular intervals. A guide roller is provided that can fit into the previously cut groove and roll freely, and by causing the pedestal to run along the previously cut groove, the running surface is covered with the cutting blade. A concrete cutter for floor lifting that uses an expansive destructive agent that can form multiple parallel grooves at regular intervals.