JPS64246Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to a cutter used as a cutting device to cut off the reinforcing bar rivets when removing a concrete column that has been formed from the forming formwork. To propose a cutter that can be used for a long time by changing the cutting blade part of the cutting blade, and that is designed to prevent attachment loosening due to cutting reaction force.

[Conventional technology]

Since it is very tiring to manually cut the rivet heads, the applicant has filed a patent application No. 58-30619 to develop a cutting device that can do this automatically.
It is proposed as a number.

The cutter used in the above proposal is
Since there was only one cutting blade, the service life was short and the cost was high.

[Problem that the invention attempts to solve]

This idea extends the useful life of the cutter by replacing the cutting blade and using it for a long time.

[Means for solving problems]

In order to solve the above problems, this invention takes the following technical measures.

The cutter 1, which is movable up and down, is brought into contact with the reinforcing bar rivet head 33 of the elastically supported concrete column 7, and the cutter 1 is moved down by the rapid downward movement of the pressurizing body 15. In a concrete column reinforcing bar rivet head cutting device configured to cut a reinforcing bar rivet head 33, the cutter 1 has a cutting blade 3 having a plurality of cutting blade parts A, B, C, . . .
Mounting hole 2 where one of the above cutting blade parts A, B, ... can be alternatively mounted so that it can be seen at the cutting position.
2c, .

[Example and operation]

Next, one embodiment of this invention will be described based on the drawings.

Figure 1 shows the front view, Figure 2 shows the side view,
As shown, the cutter 1 is formed by being divided into a holder 2 and a cutting blade 3, and the cutting blade 3 is formed by a third
As shown in the figure, the front view is shown, and in Fig. 4, the side view is shown.
A plurality of cutting blades A, B, C... (four in the illustrated example) on the periphery, and adjacent to and for these cutting blades A, B,... Slanted parts a, b, c, d that are inclined when viewed from the front are
The mounting bolt holes 3c, 3c, . . .
It is provided so as to penetrate through the thickness direction of the cutting blade 3.

As shown in a front view in FIG. 5 and in a side view in FIG. For example, the mounting holes 2c, 2c, which are made of female threads,
..., a protrusion part 2d at the center in front view, guide parts 2e, 2e on the left and right sides thereof, and a head part 2f are respectively provided,
With the mounting contact surface 3b of the cutting blade 3 in contact with the mounting contact surface 2a of the holder 2, the selected one of the cutting blade parts A, B, C, ... of the cutting blade 3 becomes the lower one. As a result, the upper end surface portion of the cutting blade 3 (in the illustrated example, one of the cutting blade portions A, B, C, etc.) comes into contact with the pressure receiving surface 2b of the holder 2, and the mounting bolt hole 3c and the mounting hole 2c come into contact with each other. The cutting blade 3 is fixed by the inserted mounting bolt 4.
can be fixed to the holder 2.

Therefore, in the illustrated example of the cutting blade 3, when the cutting blade part A is at the lowest cutting involvement position,
The cutting blade part C is in contact with the pressure receiving surface 2b, and if the cutting blade part B is in the position involved in cutting, the cutting blade part D is in contact with the pressure receiving surface 2b.
The attachment position of the cutting blade 3 to the holder 2 can be changed so that B, C, and D are respectively involved in cutting, and in this attachment state, the cutting blade that is involved in cutting is , a rake angle α and a clearance angle β are formed.

The attachment hole 2c may be formed into a simple hole, instead of being female threaded as shown in the illustrated example, and the cutting blade 3 may be attached to the holder 2 with a bolt/nut.

To explain the illustrated cutting device 5, the seventh
As the front view is shown in the figure and the side view is shown in Fig. 8,
A cart 9 of the cutting device 5 is movably placed on rails 8, 8 parallel to the forming form 7 placed on the rotary table 6 by a traveling motor 10, and is fixed to the cart 9. A spring pedestal 50 is attached to the elevating part 12 of the elevating device 11, and the pedestal 13 is supported by the spring pedestal 50 via the springs 14, 14. A pressure body 15 such as a hammer or a press that moves up and down is mounted on the pedestal 13.
A striking body 18 consisting of a first striking body 16 and a second striking body 17 and a cutter 1 are provided in the vertical direction, a flywheel 19 is driven by a motor 20 and rotates, and an eccentric cam 21 pushes a pressurizing body 15. It is installed so that it can be moved up and down.

A stepped portion 22a is formed on the frame 22 placed and fixed on the pedestal 13, and a first step is formed along the stepped portion 22a.
A striking body guide 23 is provided so as to be movable in and out in the left-right direction in FIG. The other end of the spring 24, which has one end engaged with the first striking body 16, is placed on the first striking body guide 23, and the first striking body 16 is moved by this spring 24.
is suspended, and the first striking body guide 23 is connected to the actuator 25a of the electromagnetic solenoid 25 using the connecting rod 26. When the electromagnetic solenoid 25 is not energized, the connecting rod 27 is Since it has returned to the right side of the figure, the first striking body 16 is located outside the vertical movement locus of the pressurizing body 15, and
When the electromagnetic solenoid 25 is energized, the actuator 25
a, the first striking body guide 23 projects to the left in FIG.
The first striking body 16 struck by the downward movement of the first striking body 16 is configured to move downward along the guide hole of the first striking body guide 23.

The second striking body 17 is vertically movably inserted into a second striking body guide 28 attached to the frame body 22 so as to be positioned directly below the first striking body 16 in the protruding state. It is suspended from a frame 22.

The guide rod 31a of the cutter guide 31 is loosely inserted into the bracket 30 attached to the frame 22 so as to be movable in the left-right direction as shown in FIG. Guide groove 3
1b, the cutter 1 is inserted into the cutter guide 31 so as to be vertically movable below the second striking body 17 by fitting the guide parts 2e, 2e of the cutter 1 into the cutter guide 31. Moreover, the front surface of the cutting edge of the cutter 1 is elastically brought into contact with the end of the plate 32 of the molding frame 7 by the spring 32.

A detector 34 is provided that can detect when the reinforcing bar rivet head 33 reaches directly below the cutter 1 by rolling through the forming frame 7, and the electromagnetic solenoid 25 is energized by the detection operation of the detector 34. The one shown as an example of the detector 34 is shown in an enlarged side view in FIG.
Also, as shown in perspective in Fig. 12, the cutter 1
An operating piece 36 is provided which is rotatable around a fulcrum pin 35 implanted in the holder, and left and right brackets 38 and 39 are attached to a mounting plate 37 fixed to the pedestal 13.
The pushing body 41 is loosely inserted into the horizontal rod 40 attached to the brackets 38 and 39, and the rotation preventing rod 42 fixed to the pushing body 41 is engaged with the long groove 43 of the mounting plate 37, and one arm 36a of the actuating piece 36 is inserted. is seen near the pushing plate 44 fixed to the pushing body 41, and the pushing plate 4
4 is placed near the actuator 45a of the microsocket 45 attached to the mounting plate 37, and the 13th
In the figure, when the shaping form 7 is rolled in the direction of the arrow, the reinforcing bar rivet head 33 comes into contact with the inclined part a of the cutting blade part A, pushing up the cutter 1 as shown in FIG. Push the other arm 36b with the reinforcing bar stud head 33 to move the actuating piece 3 in the direction of the arrow in FIG.
6, the arm 36a of the actuating piece 26
pushes the pushing body 41 in the direction of the arrow G in FIG. 45 operates, the electromagnetic solenoid 25 is energized, and the first striking body guide 23
is configured so that the first striking body 16 projects below the pressurizing body 15, and when the reinforcing bar rivet head 33 is cut by the cutter 1, the actuating piece is moved together with the pushing body 41 by the spring 46. 36 is also configured to return to its original position before the reinforcing bar rivet head 33 starts to come into contact with it.

Next, to explain the cutting operation, the forming formwork 7, in which concrete has been poured and steam curing has been completed, is placed on the rotary table 6, and the outer diameter of the plate 32 and the reinforcing bar rivet head are adjusted depending on the type of concrete column. 33 have different pitch diameters, thin plates 48 are placed on the reaction force receiving portion 47 of the pedestal 13 to accommodate the above-mentioned types of changes in the concrete column body.

Then, when the traveling motor 10 is driven to bring the cart 9 close to the plate 32, the cutter 1 comes into elastic contact with the end surface of the plate 49 via the cutter guide 31 which is energized by the spring 32. Become.

Therefore, by operating the lifting device 11, the reaction force receiving part 4
The pedestal 13 is raised until the thin plate 49 on top of the plate 49 comes into contact with the lower end of the plate 49, and then
When the upper forming form 7 is gently rotated in the direction of the arrow A in FIG. 7 by a rotary drive device (not shown), the reinforcing bar rivet head 33 approaches the lower part of the cutter 1, and the reinforcing bar rivet head 33 approaches the lower part of the cutter 1. The head 33 comes into contact with the inclined part a of the cutter 1 and pushes the cutter 1 up to the position shown in FIG. When the reinforcing bar rivet head 33 reaches directly below the cutter 1, the micro switch 45 is operated by the operation of the actuating piece 36, the pushing body 41, and the pushing plate 44, and the electromagnetic solenoid 25 is energized. As a result, the first striking body 16 protrudes directly below the pressure body 15 and the pressure body 1
5, the first striking body 16 moves the second striking body 17 downward, and the downward movement of the second striking body 17 strikes the cutter 1 to cut the reinforcing bar rivet head 33. It is something.

Since the pedestal 13 is supported by the springs 14 , 14 , even if the molding frame 7 rotates slightly eccentrically, the plate 49 is supported by the reaction force receiving portion 4 of the pedestal 13 .
7, the eccentricity is elastically absorbed.

In addition, in the embodiment described above, the first striking body 16 and the second
Although the striking body 17 is provided, it is also possible to use one striking body by making the first striking body long.
is not limited to the above-mentioned one, and the pressurizing body 15
may be a hammer or press using power such as hydraulic pressure, water pressure, or pneumatic pressure.

[Effect of idea]

The cutter used in the apparatus for cutting the reinforcing bar rivet heads of concrete columns according to this invention is constructed as described above, and one of the cutting blade parts A, B, ... of the cutting blade 3 is placed in the cutting position. Since the cutting blade 3 can be transferred and attached to the holder 2, when one cutting blade becomes unusable due to wear or damage, another unused cutting blade can be placed in the cutting position. By replacing the cutting blade 3, the cutting blade 3 regains its sharpness and can be used for a longer period of time, making it extremely economical.

Moreover, since the cutting reaction force acting on the cutting blade 3 can be received by the pressure receiving part 2b provided on the holder 2, the proportion of the cutting reaction force that should be borne by the mounting bolt is not small. However, the problems caused by the fact that the holder 2 is not manufactured in one piece have been completely eliminated, and there is no longer any loosening of the attachment. It became a strong cutter.

[Brief explanation of drawings]

The figures show one embodiment of this invention, in which Fig. 1 is a front view of the cutter, Fig. 2 is a side view of Fig. 1, Fig. 3 is a front view of the cutting blade, and Fig. 4 is a side view of Fig. 3. Figure 5 is a front view of the holder, Figure 6 is a side view of Figure 5, Figure 7 is a front view of the cutting device, Figure 8 is a side view of Figure 7, Figure 9 is Figure 8. Enlarged view of main parts, No. 10
The figure is a cross-sectional plan view of Figure 9, Figure 11 is an enlarged view of the main part of Figure 7, Figure 12 is an enlarged view of the main part of the detector,
3 and 14 are enlarged front views of main parts showing the cutting preparation process, respectively. Code explanation, 1...Cutter, 2...Holder, 2b...
Pressure receiving part, 2c...Mounting hole, 3...Cutting blade, 7...Concrete column body, 15...Pressure body, 33...Reinforcing bar rivet head,
A, B, C, ...cutting blade section.

Claims (1)

[Scope of utility model registration request] A cutter, which is movable up and down, is brought into contact with the reinforcing bar rivet head of the elastically supported concrete column, and the cutter is moved down by the rapid downward movement of the pressurizing body, thereby cutting the rivet bar rivet head. In a concrete column reinforcing bar head cutting device configured to cut,
The cutter has a cutting blade having a plurality of cutting blades on its circumference, a mounting hole that allows one of the cutting blades to be alternately mounted so that one of the cutting blades can be selectively viewed at a cutting position, and a mounting hole for each of the cutting blades. 1. A cutter for use in a reinforcing bar rivet head cutting device for a concrete column, characterized in that the cutter is comprised of a holder having a pressure receiving part capable of receiving a cutting reaction force acting on the cutting blade part in an installed state.