JPH07113331A - Deck plate cutter - Google Patents

Abstract

PURPOSE:To bore through holes from a sleeve side, by raising a stem by rotation thereof, holding a driving device at the center of radial direction of the sleeve by a fixing tool, rotating a cutter along the inner face of sleeve, and vertically moving it. CONSTITUTION:The length of shaft 14a of a cutter 14 is adjusted to correspond to the inner diameter of a sleeve 4 and the shaft 14a is fixed and the cutter 14 is inserted in the sleeve 4. Next, the length of a fixing tool 9 is adjusted and a metal fitting 8 is connected to the sleeve 4 and the driving device 7 is fixed at the center of sleeve 4 and the stem 10 is inserted in the shaft center of the sleeve 4. Next, compressed air is supplied to an air motor and the stem 10 is rotated to move the cutter along the inner face of the sleeve 4. Subsequently, an upward force exceeding the repulsive force of a spring is actuated at the external end of respective vertically thrusting levers and the cutter 14 is pushed down by the drive of the air motor. The deck plate is cut to form a circle and provided with pierced holes. The stem 10 and the cutter 14 are automatically raised and restored by releasing the force of vertically thrusting levers 27.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deck plate cutting device.

[0002]

2. Description of the Related Art In the conventional deck plate construction method, as shown in FIG. 3, a deck receiving beam 2 is erected between walls 1 standing upright at a predetermined interval, and the deck receiving beam 2 is mounted on the deck receiving beam 2. 2 The deck plate 3 is stretched in a direction orthogonal to the extending direction, and a required number of sleeves 4 having a predetermined diameter are placed upright at positions where through holes such as pipes are to be provided. After placing concrete 5 on the top to form the building floor surface, the deck plate 3 of the portion where the sleeve 4 is arranged is cut from the lower side using the scaffold 6 temporarily installed on the lower floor to form a through hole. Piping work is performed using the through holes.

[0003]

However, when the above-mentioned deck plate 3 is cut, since the deck plates 3 are separated from each other, the sleeve 4 cannot be seen directly, and the sleeve 4 is penetrated in accordance with the arrangement position of the sleeve 4. Since it is difficult to make a hole, it is necessary to repeat trial and error work, resulting in poor work efficiency. Moreover, since the scaffold 6 is required and the work is upward, it is dangerous, and it is difficult to open the through hole cleanly. There was a problem such as.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a deck plate cutting apparatus capable of forming a through hole from the upper side of a sleeve.

[0005]

DISCLOSURE OF THE INVENTION According to the present invention, a deck plate is stretched on a deck receiving beam, a sleeve having a predetermined diameter is erected at a position where a through hole is to be installed on the deck plate, and the inside of the sleeve is excluded. In the deck plate cutting device that cuts the deck plate inside the sleeve standing portion after placing the concrete on the plate to form the floor surface,
A stem disposed on the center line of the sleeve and provided with a cutter at its lower end so as to be able to rotate along the inner surface of the sleeve; and a drive device that penetrates the interior and rotates the stem and ascends and descends, A fixing device for holding the drive device at the radial center of the sleeve is provided.

[0006]

Therefore, in the present invention, the cutter, which is fixed to the radial center of the sleeve by the fixing device and rotates along the inner surface of the sleeve and pressed against the deck plate, cuts the deck plate into a circular shape to form a through hole. To drill.

[0007]

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

FIG. 1 is a perspective view showing an outline of an embodiment of a deck plate cutting apparatus of the present invention, and FIG. 2 is a detailed sectional view related to FIG. 1, in which the same reference numerals as those in FIG. Is attached. Denoted at 3 is a deck plate and 4 is a sleeve. The drive device 7 provided is arranged in the radial center near the upper end of the sleeve 4, and is formed so that the drive device 7 can be fixed to the radial center of the sleeve 4 by the fixing jig 9.

A stem 10 is provided along the axis of the sleeve 4 so as to pass through the drive device 7 and extend right above the deck plate 3. The stem 10 has a lower end portion which is orthogonal to the axis of the stem 10 and which is perpendicular to the axis of the sleeve 4. A cutter holder 13 having a through hole 11 oriented in the radial direction and having a push screw 12 is provided on the side of the through hole 11, and the shaft portion 14a of the cutter 14 is inserted into the through hole 11 of the cutter holder 13. The cutter 14 can be attached to the lower end of the stem 10 by tightening the push screw 12.

As shown in FIG. 2, the drive unit 7 is a casing having sleeve bearings 15 and 16 penetrating in the vertical direction for holding the stem 10 in a rotatable and slidable manner at the centers of the upper and lower surfaces. 17, the casing 17
A gear 18 fitted in a predetermined position of the stem 10 therein.
And the bearings 19 and 2 arranged above and below the gear 18, respectively.
0, a spring 21 interposed between the lower bearing 20 and the bottom surface of the casing 17 to urge the gear 18 upward together with the stem 10, a pinion 22 meshing with the gear 18, and a pinion 22. Each of the rectangular holes 2 is provided with an air motor 23 that is directly connected to the casing 17 and is provided on each of opposite wall surfaces of the casing 17 and is long in the vertical direction.
4, 25 are rotatably supported at substantially the center in the vertical direction via a pin 26, and extend substantially linearly in a symmetrical direction with the stem 10 sandwiched between them. A vertical propulsion lever 27 is provided which is formed so as to be able to come into contact with the upper surface of the bearing 19 disposed in the upper portion and has the other end extending outside the casing 17 formed in a shape that is easy to grip.

Further, in order to prevent the lower end portion of the stem 10 from swinging, a sleeve bearing 28 which is fitted onto a portion of the stem 10 slightly below the intermediate portion in the longitudinal direction, and the sleeve bearing 2
8 is provided with a steady rest 31 which extends radially in three directions in the radial direction of the sleeve 4 and includes an expansion / contraction device 30 and an adjustable expansion / contraction arm 29.

Next, the operation will be described. By loosening the push screw 12 provided on the cutter holder 13 and allowing the shaft portion 14a of the cutter 14 to move in and out of the cutter holder 13,
The length of the shaft portion 14a is adjusted so as to match the inner diameter of the sleeve 4, and the push screw 12 is tightened to fix the shaft portion 14a, and then the cutter 14 is placed in the sleeve 4 to insert the deck plate cutting device into the sleeve 4. The drive device 7 is inserted by adjusting the length of the fixing jig 9 and engaging the locking metal fitting 8 with the upper end of the sleeve 4.
Is fixed in the center of the sleeve 4, and the length of the arm 29 of the steady rest 31 is adjusted to fix the steady rest 31 so that the stem 10 passes through the axis of the sleeve 4.

Then, compressed air is supplied from an unillustrated compressed air source to the air motor 23 to supply the pinion 22 and the gear 1 with each other.
8, the stem 10 is rotationally driven, and the cutter 14 attached to the lower end of the stem 10 is rotated around the inner surface of the sleeve 4.

Next, when an upward force exceeding the repulsive force of the spring 21 provided at the bottom of the casing 17 is applied to the outer end portions of the vertical propulsion levers 27, 27 protruding to the outside of the casing 17, the vertical propulsion levers are applied. 27, 27 rotate about the pin 26, the ends of the vertical propulsion levers 27, 27 in the casing 17 abut on the bearing 19 above the gear 18, and further through the bearing 19, the gear 18 and the stem 10. The cutter 14, which is driven by the air motor 23 and is rotating, is pushed down. The depressed cutter 14 cuts the deck plate 3 into a circular shape by its blade edge, and as a result, a through hole is formed in the deck plate 3.
After the through hole is formed, when the force applied to the vertical propulsion lever 27 is removed, the stem 10, the cutter 14, etc. are automatically raised by the repulsive force of the spring 21 and return to the initial state.

According to the above, the cutter 14 that is driven by the drive device 7 that can be fixed to the upper end of the sleeve 4 and that can rotate around the inner surface of the sleeve 4 is provided. Since it is formed so as to be able to move up and down by the spring 21 provided in the drive device 7, safety is improved and work efficiency can be improved because the work is downward without requiring a scaffold or the like.

The present invention is not limited to the above-described embodiment. For example, when the sleeve 4 is short and the long stem 10 is not required, the steady rest 31 may not be provided. Of course, various changes can be made without departing from the scope of the present invention.

[0017]

According to the deck plate cutting device of the present invention, various excellent effects as described below can be obtained.

I) Safety is improved because a scaffold is not required and the work is performed downward.

II) Since the through hole can be formed by directly utilizing the sleeve, the work can be facilitated, the work efficiency can be improved, and a clean through hole can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view schematically showing an embodiment of a deck plate cutting device of the present invention.

FIG. 2 is a detailed cross-sectional view related to FIG.

FIG. 3 is a cross-sectional view schematically showing an example of a conventional deck plate construction method.

[Explanation of symbols]

 2 Deck receiving beam 3 Deck plate 4 Sleeve 5 Concrete 7 Drive device 9 Fixing jig (fixing device) 10 Stem 14 Cutter 27 Vertical propulsion lever (elevating device)

Claims (1)

[Claims] 1. A deck plate is stretched on a deck receiving beam, a sleeve having a predetermined diameter is erected at a position where a through hole is to be installed on the deck plate, and concrete is placed on the deck plate excluding the inside of the sleeve. In the deck plate cutting device for cutting the deck plate inside the sleeve standing portion after constructing the floor surface with a cutter, the cutter is arranged on the center line of the sleeve and can be rotated along the inner surface of the sleeve at the lower end. A deck plate comprising: a stem provided with a stem; a drive device that penetrates the interior of the stem and rotates and elevates the stem; and a fixing device that holds the drive device in the radial center of the sleeve. Cutting device.