JPH0222245Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a roof tile nail drilling device for drilling nail holes at predetermined positions in a roof tile molding base.

As shown in FIG. 1, such a conventional nail drilling device has a holder a whose vertical movement is controlled by appropriate means, and a drilling needle c for drilling a nail hole into a molded material w on a pedestal b. The drilling needle c was moved up and down to drill a nail hole.

However, with such a mechanism, when drilling a nail hole on the pedestal b, the tip of the nail hole cannot completely penetrate, and since the stroke of the drilling needle c is constant, the drilling needle c may wear out and the pedestal may If the heights of b are uneven, the nail hole will not be sufficiently drilled.Furthermore, since the hole punching needle c has a round bar shape, there will be a large resistance during drilling, and if the pedestal b is unstable, it will be easily deformed. It had various drawbacks such as.

In view of these drawbacks, the present invention provides a nail drilling device in which a nail hole is drilled by moving a hole punching needle up and down relative to the nail hole drilling position in a molded material placed on a pedestal. A cushion material is filled on the pedestal corresponding to the hole drilling position, and the support shaft supporting the hole drilling needle is held elastically by a spring against a holder whose vertical movement is controlled. Provided is a nail drilling device formed of a pipe-like member, having a discharge portion formed at the upper end of the punching needle, and having an air nozzle attached to the punching needle for spouting compressed air toward the discharge portion. In order to solve the above-mentioned drawbacks, one embodiment of the present invention will be described below based on the drawings. 1 is the main body of the nail drilling device, and the molded material w placed on the pedestal 2 is A holder 4 whose vertical movement is controlled by an appropriate means is provided above the position where the nail hole 3 is to be drilled, and a support shaft 7 to which a drilling needle 6 is attached to the lower end of the holder 4 via a bracket 5 is slid up and down. The holder 4 on the support shaft 7 can be inserted freely.
Attach stop springs 8 and 9 to the upper and lower positions of
A spring 10 is press-fitted between the lower stop ring 9 and the lower surface of the holder 4 to hold the support shaft 7 against the holder 4 so as to press it downward.

The piercing needle 6 attached to the lower end of the support shaft 7 is made of a carbide material and is a hollow pipe-shaped member whose diameter decreases slightly as it goes downward. A discharge pipe 12 is connected to the discharge part 11, and an air nozzle 13 to which compressed air is supplied is connected to the bracket 5 supporting the piercing needle 6. A jet hole 14 communicating with the air nozzle 13 is opened toward the discharge part 11 side of the piercing needle 6.

In addition, a cushion material 15 made of an elastic material such as rubber or urethane is filled in a portion of the pedestal 2 corresponding to the position where the nail hole 3 is to be drilled, and is made of an elastic material such as rubber or urethane to elastically receive the lower end of the hole punching needle 6. There is.

Next, the operation of the roof tile nail drilling device according to the present invention will be explained. First, when the holder 4 is in the raised position, the support shaft 7 is supported in a lowered state with the upper stop ring 8 in contact with the holder 4, and the drilling needle is 6
is supported by a support shaft 7 and is waiting above the nail hole 3 to be drilled. In this state, when the holder 4 is moved downward after placing the molded material w on the pedestal 2, the punching needle 6 descends under pressure by the spring 10 via the support shaft 7, and the molded material w is lowered. and descends until it is slightly press-fitted into the cushion material 15 of the pedestal 2. At this time, the holder 4 is set to further descend by a predetermined stroke, and the excessive downward stroke is absorbed by the spring 10, so the punching needle 6 is always slightly pressed into the cushion material 15. Then, the nail hole 3 is completely hollowed out from the clay in the area corresponding to the nail hole 3. The hollowed out debris is absorbed by the compressed air jetted from the air nozzle 13 toward the discharge section 11, and is discharged to a predetermined location through the discharge pipe 12.

In short, the present invention provides a nail drilling device in which a nail hole is drilled by moving a hole punching needle up and down relative to the nail hole drilling position in a molded material placed on a pedestal. Since the cushion material 15 is filled on the pedestal corresponding to the drilling position, the lower end of the drilling needle 6 is press-fitted into the cushion material 15, thereby making it possible to completely drill the nail hole 3. Since the spindle 7 that supports the piercing needle 6 is elastically held by the holder 4 whose vertical movement is controlled via the spring 10, there is no possibility of the piercing needle 6 being worn out or the height of the pedestal 2 being uneven. However, if the lifting stroke of the holder 4 is set longer, the nail hole 3 will be smaller than the hole punching needle 6.
Since the drilling needle 6 is formed of a hollow pipe-like member, the resistance when drilling the nail hole 3 is reduced and smooth drilling is achieved. In addition, since a discharge part 11 is formed at the upper end of the piercing needle 6 and an air nozzle 13 is attached to the piercing needle 6 to blow out compressed air toward the discharge part 11, it is possible to Its practical effects are enormous, such as being able to discharge the extracted hole shavings to a predetermined location using compressed air.

[Brief explanation of the drawing]

The figure shows one embodiment of the present invention.
The figure shows a conventional example, FIG. 2 is a sectional view of a roof tile nail hole drilling device according to the present invention, and FIG. 3 is a perspective view of a molded base. 2... pedestal, 3... nail hole, 4... holder, 6
... Hole needle, 7... Support shaft, 10... Spring,
11...Discharge part, 13...Air nozzle, 15...
...Cushion material.

Claims (1)

[Scope of utility model registration request] In a nail drilling device that drills a nail hole by moving a drilling needle up and down relative to the nail hole drilling position in a molded material placed on a cradle, Fill the table with cushion material,
In addition, a support shaft that supports the piercing needle is elastically held by a spring against a holder whose vertical movement is controlled, and the piercing needle is formed of a hollow pipe-like member, and the piercing needle is discharged from the upper end of the piercing needle. A roof tile nail drilling device, characterized in that an air nozzle is attached to the punching needle to form a section and blow out compressed air toward a discharge section.