JPH0674212U - Small core boring machine - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to a core boring machine for drilling a concrete body in a relatively narrow space such as a concrete structure or a concrete bridge pier, and can be set even in a narrow work space and can be driven. It is an object of the present invention to provide a small core boring machine that can obtain a sufficient drive output without reducing the output of an application motor. [Structure] A driving motor 6 slidably mounted on a supporting pole 21 provided upright on a base 2 and a drilling tool, and the axis of the driving motor 6 and the axis of the drilling tool are In a core boring machine arranged in parallel, the pole 21 is made swingable with respect to the base 2, and the axis b of the drive motor 6 is made orthogonal to the axis a of the drilling tool. It is present in a small core boring machine 20 in which the height H ₂ of the pole 21 is lowered.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a core boring machine for drilling a concrete body in a relatively narrow space for repair work in concrete structures, concrete bridge piers and the like.

[0002]

[Prior art]

 Generally, in a core boring machine 1 used for drilling a hole in a concrete body for repair work or the like, a pole 3 is erected on a base 2 with a mounting screw 4 as shown in FIG. The motor 6, the speed conversion gearbox 7 and the drilling tool 8 are attached to the pole 3 via the clamp 5 to form the core boring machine 1.

The drilling tool 8 is formed by connecting a coupling 9, a tube 10 and a bit 11 with their axes aligned. Therefore, the shaft center of the drilling tool 8 and the shaft center of the drive motor 6 for rotating the drilling tool 8 are arranged to be parallel to each other. Then, by manually rotating the handle 12, the pinion (small gear) that meshes with the rack 13 rotates, and the drive motor 6 and the drilling tool 8 move up and down to drill a hole in the concrete body. It is something to do. Reference numeral 14 is a caster for moving the core boring machine 1, and 15 is an anchor bolt for fixing the core boring machine 1 at a predetermined position of a concrete body to be drilled.

[0004]

[Problems to be solved by the device]

 However, in the core boring machine 1 described above, since the driving motor 6 and the drilling jig 8 have their axes arranged in parallel, the total height H of the assembled core boring machine 1 is about 1000 mm. Will end up. In this case, for example, even if an attempt is made to drill a hole in a narrow space of a concrete pier, if the height of the working space is 1 m or less, the core boring machine 1 may not be set. As described above, the conventional core boring machine has a drawback that it cannot perform drilling work in a narrow working space. Further, if the height of the core boring machine is lowered according to a narrow working space, the driving motor mounted on the core boring machine must be small at the same time, and the motor becomes small, so that a sufficient output cannot be obtained. There was a drawback.

The present invention has been made in view of the above problems, and provides a small core boring machine which can be set even in a narrow working space and can obtain a sufficient drive output without reducing the output of the drive motor. The purpose is to provide.

[0006]

[Means for Solving the Problems]

 The gist of the present invention to solve the above-mentioned problems and achieve the above-mentioned object consists of a driving motor and a drilling tool slidably mounted on a supporting pole erected on a base. In a core boring machine in which the shaft center of the motor and the shaft center of the drilling tool are arranged parallel to each other, the pole is swingable with respect to the base and the shaft center of the drive motor is drilled. It lies in that the height of the pole is lowered by arranging the pole orthogonally to the axis of the tool.

[0007]

[Action]

 In the small core boring machine according to the present invention, the shaft center of the driving motor and the shaft center of the drilling tool are orthogonal to each other, so that the motor is laid sideways and the overall height of the core boring machine is lowered. This enables drilling work in a narrow working space. Also, since the support pole can be swung freely, diagonal drilling work is also easy.

[0008]

【Example】

 Next, the present invention will be described with reference to the drawings. FIG. 1 is a front view of a small core boring machine according to the present invention, FIG. 2 is a side view, and FIG. 3 is a plan view. In the figure, reference numeral 20 is a small core boring machine, 21 is a support pole, 21a is an extension of the pole 21, 22 is an inclined positioning plate, 23 is a speed / direction changing gearbox, 24 is an automatic feed control device, and 25 Indicates a coupling mounting portion, and 26 indicates a water supply cock. For ease of understanding, the parts corresponding to the conventional ones are given the same reference numerals.

In the small core boring machine 20 of the present invention, the drive motor 6 for rotating the bit for drilling is laid down side by side with respect to the core boring machine 1 of the related art, and the axis of the drilling tool and the motor 6 are By making their axes orthogonal to each other, the overall height H2 (see FIG. 1) of the small core boring machine 20 is lowered, and the pole 21 which supports the motor 6 and the drilling tool so that the drilling can be performed obliquely. It is a swingable body with respect to the base 2.

The drive motor 6 is a motor having the same output as the motor of the core boring machine 1 shown in the conventional example. As shown in FIG. 2, the driving motor 6 is arranged such that the axis a of the drilling tool 8 (not shown) of the core boring body 27 and the axis b of the rotary shaft of the motor 6 are directly connected to each other to change the speed / direction. It attaches to the core boring main body 27 via the gear box 23 for. In order to make the axes of each other orthogonal to each other in this way, a bevel gear or the like is used in the speed / direction changing gearbox 23.

The motor 6 and the core boring main body 27 are slidably supported by a supporting pole 21 by a special liner 28. In order to make the support pole 21 slidable in the vertical direction, the automatic feed control device 24 and the feed portion 24a thereof as shown in FIG. 2 mesh with the rack 13 provided on the pole 21. This is done by rotating the pinion (small gear) that has been rotated forward and reverse.

Next, in order to make the support pole 21 swingable with respect to the base 2, an extension portion 21 a is integrally provided at a lower portion of the pole 21, and a positioning portion is provided at a tip portion thereof. 21d is provided. Then, the base 2 is provided with an inclined positioning plate 22 standing vertically, and positioning screw holes, for example, vertical screw holes 22a, 15 ° screw holes 22b, and 30 ° screw holes 22c are provided therein. . Further, a through hole serving as a center of rotation is provided in the lower portion of the support pole 21, and a screw hole 22d is also provided in the tilt positioning plate 22 at a position corresponding to the through hole.

Then, as shown in FIG. 2, a bolt 21b serving as a rotary shaft is inserted into the through hole of the supporting pole 21 and the screw portion thereof is screwed into the screw hole 22d of the inclined positioning plate 22. The pole 21 is rotatable with respect to the bolt 21b. Next, as shown in FIGS. 1 and 2, a bolt 21c for angular position determination is inserted into the hole 21d of the extending portion 21a and loosely fitted therein, and the bolt is inserted into the screw hole 22a of the inclined positioning plate 22. The screw part of 21c is screwed. As a result, the supporting pole 21 stands upright with respect to the base 2.

In order to incline the support pole 21 with respect to the base 2 by 15 °, the pole 21 is inclined and the hole 21d of the extended portion 21a is aligned with the screw hole 22b of the inclined positioning plate 22. Then, the bolt 21c may be inserted into the hole 21d for loose fitting, and the screw portion of the bolt 21c may be screwed into the screw hole 22b. The same is done when the supporting pole 21 is inclined at 30 ° with respect to the base 2. Needless to say, the pole 21 may be fixed in a tilted manner so that the swinging angle can be changed steplessly.

The compact core boring machine 20 of the present invention thus constructed has a total height H2 of about 700 mm at the highest height, which is less than the total height H of the conventional core boring machine 1 of 1000 mm. It will be much lower.

In order to use the small core boring machine 20, the small boring machine 20 is moved to the caster 14 of the base 2 and fixed to a predetermined position with the anchor bolt 15 in a work space where a concrete bridge pier is narrow. , Set the support pole 21 at an arbitrary angle. Then, the drilling tool 8 (not shown) including the coupling 9, the tube 10 and the bit 11 is mounted on the coupling mounting portion 25 of the core boring body 27.

Next, a hose (not shown) for supplying cooling water for the water supply cock 26 is connected, and the automatic feed control device 24 is operated to rotate the pinion via the feed portion 24a to scrape the concrete body. The motor 6 which has been laid down to make a hole, the core boring body 27, and the drilling tool 8 are automatically fed downward together. At the same time, the motor 6 is rotated to supply cooling water from the water supply cock 26 to the bit 11 (not shown) to drill the concrete body.

In this way, the small core boring machine 20 of the present invention is set in a narrow working space and the concrete body is drilled vertically or diagonally. Further, when the bit 11 of the drilling tool 8 is removed or replaced, the support pole 21 is tilted by about 50 ° (the position is not fixed) for replacement work.

[0019]

[Effect of device]

 As described above, the small core boring machine according to the present invention comprises the driving motor slidably mounted on the supporting pole erected on the base and the drilling tool. In a core boring machine in which the shaft center and the shaft center of the drilling tool are arranged parallel to each other, the pole is swingable with respect to the base, and the shaft center of the drive swing motor is set to the shaft center of the drilling tool. Since the poles are arranged orthogonally to each other and the height of the poles is made low, drilling work can be performed even in a narrow working space where a conventional core boring machine could not be set, and the motor also outputs the same. It was possible to secure a sufficient drilling stroke without reducing the hole diameter. Furthermore, since the support pole is swung freely, diagonal drilling can be done easily.

[Brief description of drawings]

FIG. 1 is a front view of a small core boring machine according to the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is a front view of a core boring machine according to a conventional example.

[Explanation of symbols]

20 Small Core Boring Machine, 21 Support Pole, 21a Support Pole Extension, 21c Angle Positioning Bolt, 22 Inclined Positioning Plate, 22a Vertical Screw Hole, 22b 15 ° Screw Hole, 22c 30 ° Screw Hole, 23 speed / direction changing gearbox, 24
Automatic feed control device, 25 Coupling mounting part, 26
Overall height of water cock, H2 small core boring machine.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukihiko Oikawa 1 Hoshino-cho, Kanagawa-ku, Yokohama, Kanagawa Prefecture Alfa Industry Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A driving motor and a drilling tool slidably mounted on a supporting pole installed upright on a base,
In a core boring machine in which the shaft center of the drive motor and the shaft center of the drilling tool are arranged in parallel, the pole is swingable with respect to the base, and the shaft center of the drive motor is cut. A small core boring machine, which is arranged so as to be orthogonal to the axial center of the hole tool, and the height of the pole is reduced.