Environmentally-friendly core drill system

Abstract

An environmentally-friendly core bit drill device according to the present invention comprises: a base part fixed to a structure that is to be drilled; a stand part vertically coupled to the base part and having a rack gear formed on one side surface thereof; an ascending and descending carriage which has a pinion gear that engages with the rack gear, and which is mounted on the stand part so as to be able to move up and down; a fixed plate coupled to one side surface of the ascending and descending carriage and rotatably supporting the driving shaft of a motor; a driven shaft rotatably mounted on the fixed plate and rotated by the driving shaft of the motor; a core bit coupled to the driven shaft; and a steel rod passing through the driven shaft and the core bit and coupled to an object to be cut.

Description

Eco-friendly core drilling system

[0001] The present invention relates to an eco-friendly core drilling system, and more particularly, to an eco-friendly core drilling system capable of preventing cut waste from falling and blocking the discharge of dust and contaminated water.

[0002] A core drilling machine is a mechanical device used to drill holes in walls or ceilings during construction of pipes in a building. It is usually composed of a core drill assembly together with various devices for operating the core drill.

[0003] A typical core drill assembly currently in use comprises a base portion that is fixed to a structure to be drilled with an anchor bolt, a stand portion that is perpendicular to the base portion and has a rack gear formed on one side thereof, a drive body that has a pinion gear that meshes with the stand portion and moves up and down along the stand portion by the rotation of a handle, and a core drill that is mounted on the drive body and drills a specific portion of the structure. Here, the core drill comprises a core bit that drills a hole in the structure by frictional contact with the structure, and a drive motor that rotates the core bit at high speed.

[0004] Looking at the operation of a core drill assembly having this configuration, after fixing the base to the wall or floor of a structure using a number of anchor bolts, when the handle installed on the driving body is turned, the pinion gear of the driving body and the rack gear of the stand part mesh, causing the driving body to move up and down along the stand part. At this time, when power is applied to the driving motor, the core bit rotates, and the high-speed rotating core bit moves forward to drill a hole in the structure.

[0005] Figure 1 is a schematic diagram showing drilling a bridge slab using a conventional core bit drilling device.

[0006] When a conventional core bit drilling device (10) is fixed to the upper surface of the slab of a bridge (20) and the core bit is rotated, a cylindrical cut (30) is created by cutting the slab.

[0007] However, since the conventional core bit drilling device (10) does not have a means of holding the cutting material (30), when drilling a slab of a concrete structure, especially a bridge (20) floating on a river or sea, the cutting material (30) can easily fall into the river or sea and cause contamination.

[0008] Additionally, when supplying cooling water to the cutting surface, dust and contaminated water are generated, which, if not treated, will pollute the surrounding environment.

[0009] The present invention aims to provide an eco-friendly core drilling system / device that can prevent cut waste from falling and block the discharge of dust and contaminated water.

[0010] To achieve the above object, the present invention provides an eco-friendly core drilling device comprising: a base portion fixed to a structure to be drilled; a stand portion vertically coupled to the base portion and having a rack gear formed on one side thereof; an elevating carriage provided with a pinion gear meshed with the rack gear and movably mounted on the stand portion; a fixed plate coupled to one side of the elevating carriage and rotatably supporting a drive shaft of a motor; a driven shaft rotatably mounted on the fixed plate and rotated by the drive shaft of the motor; a core bit coupled to the driven shaft; and an iron bar coupled to a cutting object by penetrating the driven shaft and the core bit.

[0011] The lower end of the above iron bar is connected to an anchor screw that is fixed to the cutting center of the cutting target, and the upper end of the above iron bar can be supported by being connected to a screw above the driven shaft.

[0012] It may further include a driving gear coupled to the driving shaft of the above motor, and a driven gear coupled to the driven shaft and rotated by the driving gear.

[0013] A hose connection for supplying air and cooling water to the inside of the driven shaft may be provided on the upper side of the driven shaft.

[0014] A dust collection cover can be installed on the upper surface of the cutting target, through which the core bit can pass sealably and whose internal space is sealed.

[0015] The above dust collection cover may include a sealing member provided on the inner surface of the through hole through which the core bit passes and a lower edge portion that comes into contact with the cutting object, and an exhaust port provided on one side of the dust collection cover to discharge dust and contaminated water.

[0016] According to the eco-friendly core drilling system / device of the present invention described above, it is possible to prevent the cut waste from falling and block the discharge of dust and contaminated water.

[0017] Figure 1 is a schematic diagram showing drilling a bridge slab using a conventional core bit drilling device.

[0018] FIG. 2 is a drawing showing an eco-friendly core drilling system / device according to one embodiment of the present invention.

[0019] The present invention is susceptible to various modifications and embodiments. Specific embodiments are illustrated and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention.

[0020] The terminology used herein is merely used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In the present invention, it should be understood that the terms "comprise" or "have" are intended to specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0021] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Please note that, where possible, identical components are represented by identical reference numerals throughout the drawings. Furthermore, detailed descriptions of well-known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some components in the attached drawings are exaggerated, omitted, or schematically depicted.

[0022] FIG. 2 is a drawing showing an eco-friendly core drilling device according to one embodiment of the present invention.

[0023] As illustrated in FIG. 2, the eco-friendly core drilling device (100) of the present invention may also be referred to as an eco-friendly core drilling system, or may be referred to by various other names, such as an eco-friendly core bit drilling system. The eco-friendly core drill device (100) of the present invention includes a base portion (110) fixed to a structure to be drilled, a stand portion (120) vertically coupled to the base portion and having a rack gear (122) formed on one side thereof, an elevating carriage (130) having a pinion gear meshed with the rack gear and mounted movably on the stand portion, a fixed plate (135) coupled to one side of the elevating carriage and rotatably supporting a drive shaft (145) of a motor (140), a driven shaft (155) rotatably mounted on the fixed plate and rotated by the drive shaft (145) of the motor (140), a core bit (160) coupled to the driven shaft, and an iron bar (170) coupled to a cutting object by penetrating the driven shaft (155) and the core bit (160).

[0024] The base portion (110) is provided with at least one pair of anchor bolts (112) and can be fixed to the surface of a structure to be perforated by fastening them with screws. The structure is usually perforated on a floor surface such as a slab, but it can also be perforated by being fixed to a wall.

[0025] The stand unit (120) may be vertically connected to and fixed to the base unit (110). Alternatively, the stand unit (120) may be connected to a rotation axis so as to change the arrangement angle with respect to the base unit (110) and may be provided with a fastening unit that maintains the rotation angle. A rack gear (122) is formed on one side of the stand unit (120) so as to elevate the lifting carriage (130) mounted on the stand unit (120).

[0026] The lifting carriage (130) has a pinion gear (not shown) that meshes with a rack gear (122) therein, and can be mounted on the stand part (120) so as to be able to move up and down. The lifting carriage (130) has a lever (133) that rotates the pinion gear, so that when a worker operates the drilling device (100), he or she can turn the lever (133) to move the lifting carriage (130) up and down. In addition, guide grooves (124) are formed on both sides of the stand part (120) to guide and support the movement of the lifting carriage (130).

[0027] A fixed plate (135) may be coupled to the lower side of one side of the lifting carriage (130), and a motor (140) may be mounted on the upper side of one side of the lifting carriage (130). The fixed plate (135) may rotatably support a driving shaft (145) of the motor (140). A reducer (142) for reducing the rotational speed of the motor (140) may be provided on the lower side of the motor (140).

[0028] The driven shaft (155) can be mounted parallel to the drive shaft (145) on the fixed plate (135). The driven shaft (155) can be rotated by receiving rotational force from the drive shaft (145) of the motor (140) through a power transmission means. Unlike the drive shaft (145), the driven shaft (155) can be formed in the shape of a hollow tube.

[0029] The core bit (160) can be fastened and combined to the lower end of the driven shaft (155). The core bit (160) is formed in a cylindrical shape with an open lower surface, and a joint hole to which the driven shaft (155) is coupled can be formed on the upper surface.

[0030] The iron bar (170) can be connected to the cutting target by penetrating the driven shaft (155) and the core bit (160). Since the iron bar (170) is connected to the part of the structure to be cut, that part is called the 'cutting target' among the structures.

[0031] The lower end of the iron bar (170) is fastened to an anchor screw (172) that is fixed to the cutting center of the cutting target, and the upper end of the iron bar (170) can be supported by being fastened to a screw (174) above the driven shaft (155).

[0032] The anchor screw (172) is a wedge-shaped anchor screw inserted into a hole drilled in the center of the cutting target. Screw threads are formed on the lower outer surface of the iron bar (170) so that it can be screwed to the anchor screw (172).

[0033] The screw (174) may have threads formed on its inner surface so that the upper end of the iron bar (170) may be inserted and fastened. The screw (174) may be provided with a handle ring on the upper end to facilitate fastening, and the iron bar (170) together with the cut waste may be easily lifted. A washer (176) may be inserted under the screw (174) to prevent damage to the device components due to fastening pressure.

[0034] The eco-friendly core drilling device (or system) (100) may further include a drive gear (150) coupled to a drive shaft (145) of a motor (140) and a driven gear (153) coupled to a driven shaft (155) and rotated by the drive gear (150). That is, the rotational force of the drive shaft (145) may be transmitted to the driven shaft (155) by means of gear coupling.

[0035] The driving gear (150) and the driven gear (153) can be mounted inside a case mounted on the upper surface of the fixed plate (135).

[0036] The driving gear (150) can be relatively non-rotatably coupled to the lower end of the driving shaft (145). The driven gear (153) can be relatively non-rotatably coupled to the middle end of the driven shaft (155). The driving gear (150) and the driven gear (153) can be formed to have the same size, but can also be formed to have different sizes to perform secondary reduction in addition to the reduction gear (142).

[0037] A hose connection (190) for supplying air and cooling water to the inside of the driven shaft may be provided on the upper side of the driven shaft (155).

[0038] The upper end of the driven shaft (155) is provided with a housing surrounding it, and this housing can be supported on the upper surface of the case in which the drive gear (150) and the driven gear (153) are mounted. The upper end of the driven shaft (155) can rotatably pass through the housing, and a plurality of through holes can be formed on the side of the upper end of the driven shaft (155). A hose connection portion (190) is provided on one side of the housing, and a hose for supplying air and cooling water can be connected. By supplying compressed air and cooling water through this hose connection portion (190), heat generated at the cutting portion of the core bit (160) can be cooled and dust can be blown downward.

[0039] A dust collection cover (180) that allows a core bit (160) to pass through and has a sealed internal space can be installed on the upper surface of the cutting target.

[0040] The dust collection cover (180) may be formed in the shape of a cylindrical or rectangular box with an open bottom. The dust collection cover (180) may be simply placed on the upper surface of the object to be cut, or may be provided with a connecting rib at the lower end and fixed by nailing or bolting to the upper surface of the object to be cut.

[0041] A circular through hole through which a core bit (160) passes may be formed on the upper surface of the dust collection cover (180). A ring-shaped sealing member (182) may be provided on the inner surface and the lower edge of the through hole of the dust collection cover (180), respectively. The sealing member (182) is made of an elastic material such as rubber, so as to seal the internal space of the dust collection cover (180) and prevent contaminated water from leaking to the outside.

[0042] A discharge port (185) for discharging dust and contaminated water may be provided on one side of the dust collection cover (180). It is preferable that the discharge port (185) be formed near the bottom of the side wall of the dust collection cover (180). A dust collection hose from a dust collector is connected to the discharge port (185) to discharge dust and contaminated water entering the internal space of the dust collection cover (180).

[0043] According to the present invention, when a cutting target is cut with a core bit and then the core drill device is separated from the structure and lifted, the cut concrete waste is suspended from a steel bar, thereby preventing the waste from falling down.

[0044] Above, one embodiment of the present invention has been described, but a person having ordinary skill in the art will be able to modify and change the present invention in various ways by adding, changing, deleting or adding components, etc., within the scope that does not depart from the spirit of the present invention described in the claims, and this is also included within the scope of the present invention.

[0045] [Explanation of symbols]

[0046] 10: Core bit drilling device

[0047] 20: Bridge

[0048] 30: Cut material

[0049] 100: Eco-friendly core bit drilling device

[0050] 110: Base 112: Anchor bolt

[0051] 120: Stand part 122: Rack gear

[0052] 124: Guide Home

[0053] 130: Lifting carriage 133: Lever

[0054] 135: Fixed plate

[0055] 140: Motor 142: Reducer

[0056] 145: Drive shaft

[0057] 150: Drive gear 153: Driven gear

[0058] 155: Drive shaft

[0059] 160: Corebit

[0060] 170: Horizontal bar 172: Anchor screw

[0061] 174: Screw 176: Washer

[0062] 180: Dust collection cover 182: Sealing member

[0063] 185: Exhaust

[0064] 190: Hose connection

[0065] The eco-friendly core drilling system is available for industrial use on construction sites.

Claims

1. Base part fixed to the structure to be perforated; A stand part vertically connected to the base part and having a rack gear formed on one side; An elevator carriage having a pinion gear that meshes with the above rack gear and is mounted on the stand so as to be able to ascend and descend; A fixed plate coupled to one side of the above-mentioned lifting carriage to rotatably support the drive shaft of the motor; A driven shaft rotatably mounted on the above fixed plate and rotated by the drive shaft of the motor; A core bit coupled to the above driven shaft; and An eco-friendly core drilling device characterized by including an iron bar that penetrates the driven shaft and the core bit and is connected to the cutting target.

2. In paragraph 1, The lower end of the above iron bar is connected to an anchor screw that is fixed to the cutting center of the cutting target, An eco-friendly core drilling device characterized in that the upper end of the above iron bar is supported by being fastened to a screw above the above driven shaft.

3. In paragraph 1, A drive gear coupled to the drive shaft of the above motor, An environmentally friendly core drilling device characterized in that it further includes a driven gear coupled to the driven shaft and rotated by the driving gear.

4. In paragraph 1, An eco-friendly core drill device characterized in that a hose connection for supplying air and cooling water to the interior of the driven shaft is provided on the upper side of the driven shaft.

5. In paragraph 4, An eco-friendly core drilling device characterized in that a dust collection cover is installed on the upper surface of the cutting target object, through which the core bit can pass sealably and whose internal space is sealed.

6. In paragraph 5, The above dust cover An eco-friendly core drilling device characterized in that it further includes a sealing member provided on the inner surface of the through hole through which the core bit passes and on the lower edge portion that contacts the cutting object.

7. In paragraph 6, The above dust cover An eco-friendly core drilling device characterized in that it further includes an exhaust port provided on one side of the dust collection cover for discharging dust and contaminated water.

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