JPS60201907A - Boring device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] This invention is applicable to stone, concrete, porcelain tiles, glass,
The present invention relates to a drilling device used for drilling hard materials such as ceramics (hereinafter referred to as "drilled material").

The general structure of the drilling cutter used in this type of drilling device is that the core bit is fixed to the open end of the cylindrical cutter body with one end open, and the closed end has a shank for connecting to a driving machine such as an electric drill. It is a series of . Therefore, unlike a normal twist drill, the tip is not sharp, so it is easy to cause so-called center deviation during drilling, and it is difficult to make the position and shape of the hole accurate.

For this reason, conventionally, there has been a cutter in which a center drill is removably attached to the center axis of the cutter body inside the cutter body, and the tip of the center drill is made to protrude beyond the tip of the cutter body. However, in this so-called center drill method, the center drill is attached inside the cutter body, so it cannot be used for items with a small outer diameter of the cutter body, and when the tip of the cutter body slightly enters the material to be drilled, the center drill had to be removed, which was inconvenient.

In addition, when drilling holes in tiled walls or floors, the tile surface is very slippery, so even if you use the center drill type drilling cutter described above, it is not possible to drill directly into the tile surface, and there is no choice but to drill directly into the tile surface. A center drill was placed in the gap between tiles to make holes.

This invention was made in order to solve the above-mentioned difficulties of the conventional example, and its purpose is to provide a drilling device that can accurately drill holes at a desired position regardless of the material, and that also has high drilling accuracy. Our goal is to provide the following.

In this invention, a spindle is rotatably attached to a casing, one end of which is used as a shank to be connected to a driving machine such as an electric drill, and a connecting hole is formed at the other end to removably connect a drilling cutter. A plurality of shafts parallel to the spindle are slidably attached to the casing, one end of each shaft is connected to a ring on the connection hole side of the spindle, and each shaft is made non-removable, and the ring is separated from the casing. The present invention is characterized in that a spring is provided which biases the ring in the direction, so that the tip of the punching cutter is located inward from the outer surface of the ring when the rings are separated from each other the most.

Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings.

Figures 1 and 2 show an embodiment of the drilling device according to the present invention for wet cutting, in which (1) is a casing, (2)
is a spindle rotatably attached to the central axis of the casing (1), (3) is a shaft parallel to and slidably attached to the central axis of the casing (1), (4)
is a ring connected to the tips of the two shafts (3) (3).

A shank (5) is formed at the upper end of the spindle (2) to be connected to a driving machine (not shown) such as an electric drill, and a connecting hole is formed at the lower end to connect a drilling cutter (6) in a detachable manner. (7) is formed.

Since this example is for wet cutting, a screw part (8) is formed approximately in the center of the spindle (2), and oil seals (9) and bearings are provided above and below the screw part (8), respectively. (10) is provided. These are fitted inside the cylinder (11), and the spindle (2) is rotatable within the cylinder (11). A water supply port (12) is formed at a position corresponding to the screw portion (8) of the cylinder (11). In this embodiment, the cylinder (11) is removably attached to the casing (1), and after inserting the cylinder (11) from above the casing (1), the cylinder is inserted by tightening the setscrew (13). (11) is fixed. The lower end of the casing (1) has a pre-locking hair ring (14
) is attached to prevent the tip of the perforating cutter (6) from wobbling during use.

In addition, when it is used for dry cutting, the cylinder (11), oil seal (9)', and part of the screw (8) are not necessary, and it is sufficient that the spindle (2) is rotatable.

The lower ends of the two shafts (3) are screwed onto an annular ring (4), and the upper ends are fitted with a pole (15a) and a washer (
A removal preventing member (15) consisting of 15b, ) is fixed. The center of the ring (4) is on the central axis of the casing (1). In addition, each shaft (3) is equipped with a ring (
4) is fitted in a spring (16) that urges the ring away from the casing (1), one end of the spring (16) contacts the top surface of the ring (4), and the other end contacts the inner wall of the casing (1). are in contact with each other.

Four anti-slips (17) made of rubber or the like are fixed to the lower surface of the ring (4), and four small protrusions (18) for positioning are formed on the side surfaces.

The lower surface of the ring (4) is perpendicular to the central axis of the casing (1). Figure 1 shows the state in which the ring (4) is most separated by the spring (16), but in this state the tip of the punching cutter (6) is inward (above) the bottom surface of the ring (4). .

Incidentally, instead of the small protrusion (18), a notch may be made in the side surface of the ring (4).

A handle (19) is provided on the side surface of the casing (1), and when this drilling device is connected to a drive machine such as an electric drill, the handle (19) comes into contact with the drive machine body,
This prevents the casing (1) itself from rotating with the rotation of the perforated cassock (6).

FIG. 3 is a front view of the perforating cutter (6). The connecting part (20) of the perforating cutter (6) consists of a hexagonal part (21) and a sealing part (22). Ring (2)
3) are fitted. Connect the connecting part (20) to the spindle (
When fitted into the connecting hole (7) of 2), the hexagonal part (21) prevents the punching cutter (6) from turning around, and also prevents the
The ring (23) prevents the water supplied to the connecting hole (7) from leaking, and the frictional force of the O-ring (23) also prevents the punching cutter (6) from coming off. Guide part (2
4) contacts the bearing (14) and inserts the perforating cutter (6) into contact with the bearing (14).
) This prevents the tip from wobbling.

Next, the state of use of the punching device according to the present invention will be explained.

First, two orthogonal straight lines are drawn at the desired drilling position of the material to be perforated, with the position as the intersection point. Next, spindle (2
) After connecting the driving device to the shank (5) and connecting the drilling cutter (6) to the connecting hole (7), the drilling device according to the present invention is held together with the driving device, and the lower surface of the ring (4) is Contact with the surface of the perforated material. At this time, the perforating cutter (6)
Since the tip of the drilling cutter (6) has not yet reached the surface, even if the wall is made of slippery materials such as tiles, the tip of the drilling cutter (6) may slip and be unable to drill, unlike the conventional center drill method. Never.

Then, a ring (4
), the tip of the punching cutter (6) will automatically match the punching position by matching the four small protrusions (1B) formed on the sides of the hole. Thereafter, by gradually pressing the driver while rotating the spindle (2), the ring (4) will move backward as the shaft (3) slides against the pressing force of the spring (16). Drilling will be done. During the drilling operation, the ring (4) is always pressed against the surface of the material to be drilled, so the operation can be carried out while checking the drilling position using the small protrusions (18). Therefore, the punch cutter (6) does not deviate from the set punching position, so that the punch can be punched at an accurate position and the shape of the hole can be made accurate. Furthermore, if the entire surface of the ring (4) is pressed against the wall surface, the hole will always be drilled at right angles to the material to be drilled.

Note that water is supplied during the drilling work in the following manner. That is, water in a water supply tank (not shown) enters the screw part (8) of the spindle (2) from the water supply port (12) via a tube (not shown). As the spindle (2) rotates, the water flows through the small hole (25) that communicates the screw part (8) and the connecting hole (7).
7). Since a through hole (26) is formed in the perforating cutter (6), water that has reached the connecting hole (7) is discharged from the tip of the perforating cutter (6) through this through hole (26).

This invention has the above-mentioned configuration, and it is possible to accurately drill a hole at a desired position without causing center deviation regardless of the material of the drilled material, and the shape of the drilled hole can be adjusted. It also has excellent effects, such as accuracy.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention, and is a half-sectional front view showing a state in which a punching cutter is attached. Figure 2 is a bottom view of the same. Figure 3 is a front view of the perforation canter. (1)...Casing (2)...Spindle (
3)...Shaft (4)...Ring (5)...
・Shank (6)...Drilling cutter (7)...Connecting hole (15)...Removal prevention member (16)...Spring agent Patent attorney Tsujimoto - Gi Figure 1 21 22 2. S24

Claims (1)

[Claims] 1. A spindle (2) is rotatably attached to the casing (1), one end of which is used as a shank (5) to be connected to a driving machine such as an electric drill, and a connecting hole (7) is formed and drilled at the other end. While removably connecting the hole cutter (6),
a plurality of shafts (3) parallel to the spindle (2);
is slidably attached to the casing (1), one end of each shaft (3) is connected to the ring (4) on the connection hole (7) side of the spindle (2), and each shaft (3) is slidably attached to the casing (1).
a spring (16) that makes it impossible to remove the ring and further biases the ring (4) in a direction away from the casing (1);
A perforation device characterized in that the tip of the perforation cutter (6) is located inward from the outer surface of the ring (4) when the ring (4) is furthest apart.