JPS5852017Y2 - Cutter for cutting large diameter steel wire - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a cutter for cutting steel wire using a ram as a driving source.

A conventional cutter of this type is shown in FIG.

That is, the conventional cutter 7 includes a main body 70 and a main body 7.
0, a wooden sword 72 fixed downward to the upper part of the main body 70, and a movable blade 73 attached to the tip of the ram 71 at a position opposite to this wooden sword 72. There is.

The movable blade 73 was pushed up by the ram T1, and the steel wire 8 was butted against the wooden sword 72 and the movable blade 73, or cut by a punching action.

With the cutter 7 having such a configuration, when cutting the steel wire 8 passing through the narrow recess 91 as shown in FIG.
Since the cutter 7 could not be inserted into the recess 91, it was impossible to cut the steel wire 8 at a position within the recess 91.

For this reason, when cutting the steel wire 8 at the above-mentioned position, a groove cutting method was used, but this method is difficult to work in narrow recesses and is therefore unsuitable for dangerous work at high places. Additionally, there was a drawback that the steel wire was affected by heat during cutting.

In the unbonding method used in construction work, quality control of the ends of the steel wires (anchoring parts) is especially important. had to be cut.

Furthermore, due to the design of the outer wall of the building, it is necessary to finish the outer wall surface smoothly, so the end of the steel wire (anchoring part) is placed in the recess 9.
In many cases, it is desired to cut within 1.

This idea was made in view of the above points, and is a large diameter steel wire cutting method that is easy to handle and can easily cut steel wires, etc. that pass through narrow recesses at a position inside the recess. It provides a cutter for use.

This invention will be explained below with reference to drawings of embodiments.

In FIGS. 1 and 2, 1 is a canter casing, 2 is a wooden knife, 3 is a ram, 4 is a movable blade holder, 5 is a movable blade, and 6 is a guide pin.

The cutter casing 1 is composed of a cylindrical body 11 and a seat holding part 12 that protrudes laterally from the cylindrical body 11. The cylindrical body 11 has a threaded hole 13 in its lower inner surface and an insertion hole 14 in its upper part. is formed, and a receiving part holding part 12 is formed on the side surface.
A punch hole 15 is formed facing the opposite side.

The wooden sword 2 is formed into a cylindrical shape having a steel wire introduction part,
It is fixed in the receiving part holding part 12.

The ram 3 consists of a sliding tip 31, a fixed portion 32, and a driving portion 33. Threads are formed on the outer peripheries of the sliding tip 31 and the fixed portion 32, respectively, and the sliding tip 31 moves up and down by a predetermined stroke. It is configured as follows.

The ram 3 is fixed to the lower end of the casing 1 by screwing the fixing portion 32 into the lower screw hole 13 of the casing 1.

The movable blade holder 4 consists of a holder body 41 and a movable blade receiver 42 that protrudes laterally from the holder body 41.
An upper screw hole 43 and a lower screw hole 44 are formed in the upper and lower parts of the holder main body 41, respectively, and a steel wire through hole 45 is formed laterally from the movable blade receiver 42.

This holder 4 is inserted into the cylindrical body 11 through the hole 15 of the casing 1, and the lower screw hole 44 of the holder 4 and the sliding end portion 31 of the ram 3 are screwed together to engage the holder 4 with the ram 3. It matches.

The movable blade 5 has a U-shape with an open top when viewed from the side, and is fixed to the movable blade holder 42 so that the wooden sword 2
It is located adjacent to.

The guide pin 6 is screwed into the upper screw hole 43 of the holder main body 41 and is held in the upper insertion hole 14 of the casing 1 so as to be slidable up and down. and regulates the sliding direction of the holder 4.

Further, a space is formed above the casing 1 to allow the cut steel wire to escape.

Next, using this cutter, for example, the steel wire 8 shown in FIG.
A method of cutting at a position within the narrow recess 91 will be explained.

The steel wire 8 passes through the concrete 9 and a recess 91 formed in the end face of the concrete 9, and is fixed under tension at both ends.

After the concrete 9 has hardened, the tension in the steel wire 8 is released,
The end of the steel wire 8 is passed through the through hole 45 of the wooden sword 2, I=- and holder 4, and the seat holding part 12 of the casing 1 is inserted into the recess 91 of the concrete 9.

By driving the ram 3 in this state, the movable blade holder 4 and the movable blade 5 are pushed up as shown in FIG. 4, and the steel wire 8 is completely removed.

cut off

That is, the steel wire 8 is cut between the wooden sword 2 fixed to the casing 1 and the movable blade 5 that moves upward within the casing 1.

As described above, since the cutter of the present invention is configured to cut the steel wire 8 within the receiving portion holding portion 12 protruding from the side of the casing 1, the steel wire 8 is cut at a position within the narrow recess 91. can be cut.

In addition, the reaction force against the breaking load when cutting the steel wire 8 acts in a direction that pushes down the movable blade 5 and pushes up the wooden sword 2, and also because the center of the drive axis of the ram 3 and the cutting position are misaligned. , a counterclockwise bending moment acts on the drive shaft of the ram 3, and a clockwise bending moment acts on the casing 1.

Therefore, unless some kind of guide mechanism is provided to restrict the moving direction of the movable blade 5 only in the vertical direction, there is a risk that the piston portion, seal portion, etc. of the ram 3 will be damaged.

In the above embodiment, the insertion hole 14 provided in the upper part of the casing 1
A guide mechanism is constituted by a guide pin 6 fixed to the upper part of the holder 4, and the above-mentioned bending moments cancel each other out at this portion.

Therefore, it is possible to prevent a bending moment from acting on the piston portion or the like within the ram 3, and the ability of the ram 3 can be fully demonstrated, and large diameter steel wires can be easily cut with a compact structure.

In the above embodiment, the steel wire 8 is cut by the shearing action, but as shown in FIG.
It can also be configured to butt and break.

That is, the wooden sword 20 is attached to the upper surface of the bearing part holding part 12 of the canter casing 1, and the wooden sword 20 and the movable blade 50 attached to the holder 4 are installed so as to face each other vertically, and are moved by the ram 3. The blade 50 may be pushed upward to cut through the steel wire 8.

In addition, the upper outer circumferential surface 46 (second
The cylindrical body 1 of the casing 1 can be slid up and down (see figure).
The guide pin 6 and the insertion hole 14 are configured to be held on the inner surface 16 of the upper part of the ram 3, and this portion serves as a guide mechanism to receive the bending moment relative to the drive shaft of the ram 3.
may be omitted.

As explained above, the cutter of this invention is configured to cut the steel wire within the wooden sword holder that protrudes laterally from the cylindrical body of the casing. Moreover, by providing a guide mechanism for the movable blade holder, it has a compact structure and can easily cut large diameter steel wires, and has high practical value.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing an embodiment of the present invention, Fig. 2 is an exploded cross-sectional view of the same, Fig. 3 is a cross-sectional view showing an example of a place where the cutter according to the present invention is used, and Fig. 4 is a cutter of the present invention. 5 is a sectional view showing another embodiment of the present invention, and FIG. 6 is a front view showing a conventional example. 1... Canter casing, 2, 20... Reception part, 3
... Ram, 4... Moving blade holder, 5,50...
moving blade. 11... Cylindrical body, 12... Wooden sword holding part, 31...
・Ram tip sliding part, 6, 14...Guide mechanism, 16,
46... Guide mechanism, 15... Punch hole, 45...
Penetration part (steel wire penetration hole).

Claims (1)

[Scope of utility model registration request] It has a canter casing, a wooden sword, a ram, a movable blade holder, and a movable blade. is fixed, a movable blade holder is arranged in the cylindrical body so as to be movable up and down, a space large enough for the cut steel wire to escape is formed above the casing, and the ram is attached to the lower end of the cylindrical body. At the same time, the tip sliding part of this ram is engaged with the movable blade holder, and the movable blade fixed to the movable blade holder is moved up and down by the ram within the wooden sword holding part at a position corresponding to the wooden sword. The wooden sword is configured to be movable, and the wooden sword is formed with an introduction part for the steel wire, and the side surface of the cylindrical body facing the wooden sword holding part and the movable blade holder have a hole for passing the steel wire through. A cutter for cutting large-diameter steel wire, characterized in that a guide mechanism is provided for restricting the movable blade to be movable only in the vertical direction.