JP2966632B2 - Floor drilling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting a fixed object such as a rack on a concrete floor with anchor bolts, and drilling a vertical hole for fixing the anchor bolts on the floor. The present invention relates to a floor surface piercing device that can be used to perform the operation.

[0002]

2. Description of the Related Art When drilling holes for anchor bolts on a concrete floor surface, it is common for an operator to manually drill a drill for drilling, such as a vibration drill. Such a conventional drilling operation method has a disadvantage that not only a skilled worker is required but also a large amount of labor is required for one drilling operation. In addition, the verticality and depth of the holes tend to vary. In particular, when two anchor bolt holes must be drilled at small intervals, such as when installing the base plate at the lower end of a rack column, one worker drills two holes separately. Therefore, not only is the efficiency inferior, but also it is difficult to maintain a high precision in the interval between the two holes and the vertical parallelism.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a floor piercing apparatus which can solve the above-mentioned conventional problems. Indicated by reference numerals, an elevating frame 8 that can move up and down on the base 1, a drill 6 for drilling a floor supported by the elevating frame 8, an elevating drive unit 9 that elevates the elevating frame 8, A floor drilling device provided with vacuum pads 3 and 4 for fixedly supporting the base 1 on a floor surface and ground moving means 2, wherein the ground moving means 2 moves up and down with respect to the base 1. A movable body 13 that is freely supported, and the movable body 1 is positioned below the grounding surfaces of the vacuum pads 3 and 4 when the movable body 13 is at the lower limit position.
3 and a cylinder 14 for forcibly lowering the movable body 13 with respect to the base 1.
The movable body 13 is constituted by the cylinder 14.
The base 1 is lifted with respect to the floor by forcibly lowering the vacuum pads 3 and 4 so that the vacuum pads 3 and 4 float from the floor.

In implementing the apparatus of the present invention having the above configuration,
A pair of left and right drills 6 and 7 are juxtaposed in a vertically movable frame 8 so as to be able to move up and down, and a drill moving means 18 for moving these two drills 6 and 7 close to and away from each other in conjunction with each other. can do.

[0005] In addition, stoppers 27a and 27b for lowering the height of the lifting frame 8 supporting the drills 6 and 7 for drilling are provided so as to be adjustable in height, and the stoppers 27a and 27b detect that the lifting frame 8 is received. A detector 32 for detection can be provided.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1 to 3, reference numeral 1 denotes a base having a rectangular frame shape in plan view, Moving means 2 is provided. Reference numerals 3 and 4 denote rectangular vacuum pads, which are attached to the bottom of the left and right ends (both ends in the length direction) of the base 1. Reference numerals 5a and 5b denote a pair of right and left vertical supports erected on the base portions 1a and 1b on the base 1, and a frame for supporting the pair of left and right drills 6 and 7 on the both supports 5a and 5b. 8 is supported so as to be able to move up and down. Numeral 9 denotes a lifting / lowering drive means for the lifting / lowering frame 8, comprising a hydraulic cylinder 11 mounted on an upper fixed frame 10 erected between the upper ends of the two columns 5.
The lower end of the piston rod 11a is
It is connected to.

The ground moving means 2 includes a movable body 13 supported at four corners of the base 1 so as to be able to move up and down.
1 and 2, the moving grounding body 12 (rotational rotation) provided at the lower end of the movable body 13 so as to be located below the grounding surface of the vacuum pads 3 and 4. A movable sphere and a free wheel) and an air cylinder 14 for forcibly lowering the movable body 13 with respect to the base 1. The vacuum pad 1 is lifted with respect to the floor surface 33 so that the vacuum pads 3 and 4 float from the floor surface 33, and the base 1 can be freely moved using the moving grounding body 12. Then, by opening the air cylinder 14 (opening the pressurizing chamber for forced lowering), the movable body 13 is opened.
The base 1 is lowered by gravity while the (moving grounding body 12) is relatively raised, and the vacuum pads 3 and 4 are grounded. The movable body 13 may be forcibly raised by the air cylinder 14 in order to ground the vacuum pads 3 and 4.

Although not shown, the vacuum pads 3 and 4 each have a rectangular frame-shaped grounding surface provided with an elastic airtight material such as rubber, and are each connected to the suction port of a vacuum pump. A degassing pipe 15 is connected.

The pair of left and right drills 6 and 7 are supported between a pair of upper and lower guide rails 16 and 17 attached to the front surface of the elevating frame 8 so as to be able to move left and right. The moving means 18 is attached to a pair of left and right drill stands 19 and 20 which can be moved close to and away from each other.
Screw shaft portions 21a and 21b of mutually opposite screws which are screwed through 0
And a screw shaft 22 whose both ends are supported by the elevating frame 8, and a rotating operation handle 23 attached to one end of the screw shaft 22. As shown in FIGS. 2 and 4, each of the drill stands 19 and 20 is a bolt that penetrates an upper and lower two-stage long hole 24 provided in the lifting frame 8 corresponding to each of the drill stands 19 and 20. With the support plate 25 and the backing plate 26, it can be fastened and fixed to the lifting frame 8.

Reference numerals 27a and 27b denote a pair of left and right stoppers provided on the left and right ends of the elevating frame 8 for receiving the abutted members 28a and 28b, respectively.
a, a pair of nuts 3 sandwiching the support plate 29 attached to the
The vertical frame 8 is vertically adjustable and is attached to the stopper 27a when the lifting frame 8 is lowered and the abutted members 28a and 28b are received by the stoppers 27a and 27b. A detector (limit switch) 32 for detecting the plate 31 fixed to the lower side of the bolt head is attached to the side surface of the contacted member 28a.

In use, the drill shafts 6a and 7a are attached to the drills 6 and 7, and the screw 2 is rotated by the handle 23 with the drill fixing bolt 25 loosened.
2 is rotated to move the two drill stands 19 and 20 closer to or away from each other, and adjust the interval between the two drills 6 and 7 so that the interval between the two blades 6a and 7a has a predetermined hole pitch. After the adjustment, the bolt 25 is tightened to
To fix the drill tables 19 and 20 (the drills 6 and 7 for drilling) to the lifting frame 8.

Next, the ground contacting means 12 of the four cornering contact moving means 2 are rolled on the floor surface 33 to move the base 1 by hand, and the blades 6a, 7a of both drills 6, 7 are drilled. Is positioned directly above the perforated position marked on the floor. In such a state,
The air cylinders 14 of the four ground contact moving means 2 are opened, the base 1 is lowered by gravity, and both vacuum pads 3 and 4 are contacted. Then, the vacuum pump connected to the degassing pipe 15 is operated, and the vacuum pad 3,
4 is adsorbed on the floor surface 33 so that the base 1 is
3 is fixed at a predetermined position.

When the fixing of the base 1 is completed as shown in FIG. 5, both drills 6 and 7 are operated to operate the blades 6a and 7 respectively.
The lifting frame 8 (both drills 6 and 7) is rotated by the hydraulic cylinder 11a of the lifting drive means 9 while rotating a.
, It is possible to pierce the floor surface 33 by the two blades 6 a and 7 a that penetrate through the central space of the base 1 and rotate down. Elevating frame 8 (both drills 6,
When the depth of piercing by the two blades 6a, 7a reaches a predetermined amount by the lowering of 7), the contacted member 28 of the elevating frame 8
a, 28b are received by stoppers 27a, 27b on the base 1 side. At this time, the detector 32 is connected to the stopper 27a.
Since the plate 31 on the side is detected, the lowering drive of the raising / lowering frame 8 (both drills 6, 7) by the raising / lowering driving means 9 (hydraulic cylinder 11a) is stopped by this detection signal, and then the raising / lowering driving means 9 ( Hydraulic cylinder 11
The drilling operation is completed by raising the elevating frame 8 (both drills 6, 7) and extracting the two blades 6a, 7a onto the floor surface 33 by a).

Thereafter, the vacuum pads 3 and 4 are opened to terminate the suction fixing operation on the floor surface 33, and the movable body 13 in each of the ground moving means 2 is lowered to the lower limit by the air cylinder 14 so that each moving When the grounding body 12 is grounded and the base 1 is lifted with respect to the floor surface 33 to lift the vacuum pads 3 and 4 from above the floor surface 33, the base body is moved to the base by using each of the moving grounding bodies 12 as described above. 1 can be manually pushed to the next drilling position.

If hydraulic pressure is supplied to the hydraulic cylinder 11a from, for example, a pneumatic-hydraulic pressure converter mounted on the upper fixed frame 10, the air for supplying pneumatic pressure to the air cylinder 14 of the ground moving means 2 is provided. Using the compressor as it is, the drills 6 and 7 can be driven to move up and down. In other words, a truck equipped with a vacuum pump connected to the vacuum pads 3 and 4 and the air compressor may be used in combination, and there is no need to mount a hydraulic pump or an oil tank on the truck. Further, the air supplied from the air compressor or the like is supplied to the floor surface 3 by using the vacuum pipes 15 of the vacuum pads 3 and 4 or by using a dedicated air discharge pipe.
3 is discharged onto the suction areas of the vacuum pads 3 and 4 on
If the floor 33 is cleaned, the suction and fixation of the base 1 by the vacuum pads 3 and 4 can be reliably performed.

[0016]

As described above, according to the floor drilling device of the present invention, a drill for drilling that can be moved up and down while the device (base) is suction-fixed to a predetermined position on the floor by a vacuum pad. By actuating and lowering by the elevation drive means, it is possible to automatically drill vertically at a predetermined position on the floor surface by the blade of the drill. Therefore, as compared with the case where the operator must directly operate the drill for hand drilling, the labor burden of the operator is greatly reduced, and, as in the case where the drill for drilling is installed on the bogie so as to be able to move up and down, There is no danger of the bogie moving unexpectedly during the drilling operation, resulting in an increase in the diameter of the drilled hole or the formation of a hole with a distorted cross-sectional shape. Work can be done. In addition, when the device (base) is moved, the device (base) can be easily and easily moved by using the ground moving means provided with wheels or the like, similarly to the one using a truck.
Work efficiency can be greatly improved.

Further, according to the structure of the present invention, instead of providing a vacuum pad so as to be able to ascend and descend on a carriage having wheels and the like, a movable grounding body such as wheels used at the time of movement is provided so as to be able to ascend and descend on a base. When using a drill for drilling,
The moving grounding body is raised with respect to the base to ground the vacuum pad provided on the base, and the base is supported at a fixed position on the floor by the vacuum pad. The base can be fixed firmly and firmly as compared with the case where the movement of the base is prevented by the vacuum pad which is grounded downward.

Further, when a vacuum pad is provided on a truck having wheels or the like so as to be able to ascend or descend, the descent of the vacuum pad must be controlled with high precision so that the vacuum pad is grounded with an appropriate ground pressure. However, in the configuration of the present invention, since the moving grounding body is forcibly lowered with respect to the base by the cylinder, the moving grounding body is freely raised as described in the embodiment. Even if it is opened as much as possible, or if the cylinder is forcibly driven to move the moving grounding body, simply raise it to a level higher than the grounding surface of the vacuum pad to make sure that the vacuum pad is grounded. The base can be supported at a fixed position on the floor surface by the vacuum pad, and elevation control is very easy.

According to the second aspect of the present invention, a pair of right and left drills are arranged in a vertically movable frame so as to be able to change the interval, and the two drills are moved closer to each other in conjunction with each other. When the drill moving means for moving apart is provided, two vertical holes necessary for fixing the base plate with two anchor bolts can be simultaneously drilled at a predetermined pitch, and two adjacent holes can be drilled. The work can be performed simply, easily and efficiently.

According to the third aspect of the present invention, the stopper for receiving the lifting frame supporting the drill for drilling at the lower limit position is used. There is no danger that the drill will continue to descend, and it is possible to reliably stop descending at the preset lower limit position, thereby improving safety. In addition, the drilling depth can be adjusted by adjusting the height of the stopper, and the lowering operation of the lifting frame (drill for drilling) is automatically performed by a detection signal of a detector that detects a state in which the lifting frame is received by the stopper. Can be stopped.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view.

FIG. 2 is a partially longitudinal side view.

FIG. 3 is a cross-sectional plan view.

FIG. 4 is a cross-sectional plan view showing a support structure for a pair of right and left drills.

FIG. 5 is a partially longitudinal front view showing a state during a drilling operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Rectangular frame base 2 ... Grounding moving means 3, 4 ... Vacuum pad 5a, 5b ... Prop 6,7 ... Drill for drilling 8 ... Elevating frame 9 ... Elevating drive means 11a ... Hydraulic cylinder 12 ... Rotatable movement Grounding body 13 ... A movable body that can move up and down 14 ... Air cylinder 16,17 ... Guide rail 18 ... Drill moving means 19,20 ... Drill table 22 ... Screw shaft 26 ... Drill fixing pad 27a, 27b ... Stopper 28a, 28b ... Member to be contacted 31. Plate to be detected 32. Detector (limit switch) 33.

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B28D 1/14 B23B 45/14

Claims (3)

(57) [Claims] An elevating frame, which can be raised and lowered, is provided on a base.
A drill for drilling a floor surface supported by a lifting frame;
Lifting means for raising and lowering the lowering frame; and
Vacuum pad fixedly supported on a surface and ground moving means
A floor drilling device provided with
A step, a movable body supported to be movable up and down with respect to the base;
When the movable body is at the lower limit position, the vacuum
Under the movable body so that it is located below the grounding surface of the pad.
A movable grounding body provided at an end, and the movable body
And a cylinder forcibly lowered
By forcibly lowering the movable body with a cylinder,
The base is lifted against the floor and the vacuum pack
Floor piercing device that allows the floor to float from the floor. 2. A pair of left and right drilling drills are provided on a vertically movable frame which can be moved up and down so as to be able to change the interval, and a drill moving means for moving these two drills closer to and away from each other in conjunction with each other is provided. The floor perforating apparatus according to claim 1, comprising: 3. A lowering limit stopper for a lifting frame for supporting the drill for drilling is provided so as to be adjustable in height, and a detector for detecting that the lifting frame has been received is attached to the stopper. Item 3. The floor perforation apparatus according to item 1 or 2.