JP2003011090A - Boring device for tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To bore various types of holes in prescribed positions of a tank according to respective types of parts and to prevent production of chips as much as possible. SOLUTION: A frame body 28 fixed to a spindle 27 is provided with a body part 40, an arm part 41 fitted to the body part 40, and a cutter blade holding part 42 fixed to the lower part of the arm part 41. When a male screw part 43 laterally fitted to the body part 40 is screwed with the arm part 41 and rotated, the arm part 41 is slid horizontally so as to adjust the distance from the central axis body 30 to a cutter blade 29.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hole punching device for a tank, and more particularly, when a predetermined hole is opened in a synthetic resin fuel tank of an automobile or the like, cut pieces or scraps cut out from the tank are removed. The present invention relates to a tank punching device configured so as not to drop into the tank.

[0002]

2. Description of the Related Art A conventional punching device for a tank of this type will be described with reference to FIGS. In the figure, a drilling device 1 is equipped with a drill unit 2, and a pulley 4 is axially attached to a spindle 3 arranged in the center of the body of the drill unit 2.
Between the belt 6 and the pulley 4a attached to the shaft of the motor 5
Is suspended. In addition, the chuck 8 attached to the lower end of the spindle 3 is provided with a drill 8 and a bite 9.
The upper end of the frame body 10 to which is attached is chucked. Then, the rotational drive of the motor 5 is transmitted to the spindle 3, and the rotation of the spindle 3 causes the frame body 10 attached to the chuck 7 to rotate. Therefore, the drill 8 attached to the frame 10 rotates, and the cutting tool 9 rotates about the drill 8 as a rotation center.

On the other hand, the tank 11 of the illustrated example is mainly used as a fuel tank for automobiles, and holes for mounting various parts such as gauges and sensors are opened at predetermined positions of the tank 11 made of synthetic resin. It is placed on the pedestal 12 and fixed by the fixtures 13, 13. In such a state, a hole 14 having a predetermined diameter is opened at a predetermined portion of the tank 11, and the diameter of the hole 14 depends on the distance between the drill 8 and the cutting tool 9 according to the component to be attached. It is determined.

First, as shown in FIG. 13, the chuck 7 mounted on the spindle 3 is lowered to bring the lower end of the drill 8 at the center of a predetermined position of the tank 11 fixed on the pedestal 12. Abut. The drill 8 is rotated by the drive of the motor 5, and the drill 8 pierces a center position of a hole 14 having a predetermined diameter to hold the rotation center of the cutting tool 9 while the cutting tool 9 surrounds the drill 8. A predetermined hole 14 is opened in the tank 11 while rotating around.

In the conventional drilling device 1 described above, the center of the hole 14 having a predetermined diameter is drilled by the drill 8 in order to set the center of rotation of the cutting tool 9, and the cutting tool is rotated while surrounding the circumference of the drill 8. Since 9 is configured to open the hole 14, chips V1, V1 ... By the drill 8 fall into the tank 11 during the rotary drilling operation of the drill 8, as shown in FIG. Further, chips V2, V2 ... Scatter even when the cutting tool 9 is opened, and pollutes the surrounding environment. Further, the cutting piece 15 having a hole equivalent diameter cut out by the cutting tool 9 falls into the tank 11. However, the chips V1, V1 ...
It is extremely difficult to remove 5 from the inside of the tank 11, and the inside of the tank 11 is not easily cleaned.

On the other hand, as shown in FIG. 15, when the tank 11 is resin-molded, the pilot hole 16 may be formed at a predetermined position where various parts are mounted. The pilot hole 16 is provided in the center of a recess 17 that bulges inward from the outside of the tank 11, and the burr 1 of the pilot hole 16 is provided inside the tank 11.
6a is protruding. If the pilot hole 16 is used, the hole 14 having a predetermined diameter can be opened around the pilot hole 16 without making a hole with the drill 8. As described above, when the pilot hole 16 is provided in the tank 11, the drill 8
Instead of this, a round bar 18 or bearing (not shown) having a diameter substantially equal to that of the pilot hole 16 is attached to the chuck 7,
The hole 14 was opened with the cutting tool 9 with the round bar 18 as the center of rotation. However, since there is a gap between the round bar 18 and the lower hole 16, the cut piece 15 having the hole equivalent diameter cut out by the cutting tool 9 also falls into the tank 11.

Therefore, there are technical problems to be solved in order to open holes of various sizes in predetermined places of the tank according to various parts and to prevent the generation of chips as much as possible. Therefore, an object of the present invention is to solve this problem.

[0008]

DISCLOSURE OF THE INVENTION The present invention has been proposed in order to achieve the above-mentioned object, and perforates holes for mounting various parts at predetermined positions of a tank placed on a pedestal. Therefore, in a drilling device for a tank, wherein a drill unit is arranged on the tank and a predetermined hole is formed in the tank by the drill unit, the drill unit is fixed to a spindle. A frame body, a central shaft body provided in a lower portion of the frame body, and a cutter blade mounted on the frame body at a predetermined distance from the central shaft body. A hole punching device for a tank, which is formed by abutting the cutter blade rotating as a hole on a surface of a tank to open a hole having a predetermined diameter, and the frame body,
The main body includes a main body fixed to the spindle, an arm attached to the main body so as to be slidable in the horizontal direction, and a cutter blade holding portion fixed below the arm. Part of the screw part that is rotatably and laterally mounted on the arm part is screwed into the arm part, and the screw part is rotated to slide the arm part with respect to the main body part, Provided is a tank punching device configured to adjust a distance to a cutter blade.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described in detail below with reference to FIGS. FIG. 1 shows a punching device 20.
And the punching device 20 includes an induction motor 21
And a gear head 22 and a lifting mechanism section 23 for reducing the rotation output thereof, a motor 24 with an electromagnetic brake and a gear head 25 for reducing the rotation output thereof, and a drill unit 2.
6 and the drill unit 26,
A frame body 28 fixed to the spindle 27, a central shaft body 30 provided below the frame body 28, and a central shaft body 30.
And a cutter blade 29 mounted on the frame body 28 at a predetermined distance from.

Further, an air pipe 36 is laid in the spindle 27 so as to be freely rotatable and vertically movable, and the central shaft body 30 is attached to a lower end portion of the air pipe 36. And the motor 24 with the electromagnetic brake
Driving force is reduced by the gear head 25, and the spindle 27 is rotated by this driving force. On the other hand, if the driving force of the induction motor 21 is decelerated by the gear head 22 and the air pipe 36 moves up and down in the spindle 27 by the elevating mechanism, regardless of the rotation of the spindle 27, the air pipe 36 is integrated with the central shaft body. 30 goes up and down.

As shown in FIGS. 2 to 4, the frame 28 is
The main body 40 fixed to the spindle 27, the arm 41 slidably attached to the main body 40 in the horizontal direction, and the cutter blade holding fixed below the arm 41. And a main body portion 40.
One end of a male screw portion 43 that is rotatably and horizontally mounted is screwed into a female screw portion 44 of the arm portion 41, and a knurled portion 43a is fixed to the other end of the male screw portion 43.
The male screw portion 43 is rotated by rotating the knurl portion 43a, the screwing position of the male screw portion 43 and the female screw portion 44 is moved, and the arm portion 41 with respect to the main body portion 40 is moved.
Slides horizontally. Therefore, the distance from the central shaft body 30 to the cutter blade 29 can be arbitrarily adjusted.

For example, as shown in FIG. 3, a male screw portion 43
In the state where the female screw portion 44 is screwed near the tip of the
Since the arm portion 41 has moved outward, the distance from the central shaft body 30 to the cutter blade 29 becomes large. That is, as will be described later, when the hole 14 for mounting various components is opened at a predetermined position of a synthetic resin tank by using the hole forming device 20 of the present invention, the diameter of the hole 14 becomes large. Become. On the other hand, as shown in FIG. 4, in a state where the female screw portion 44 is screwed in the vicinity of the proximal end portion of the male screw portion 43, the arm portion 41 is moved inward, so that the central shaft body 30 is moved. The distance from to the cutter blade 29 becomes small. That is, as will be described later, the diameter of the hole for mounting various parts is small.

As shown in FIG. 5, an actuator 45 such as a small motor is mounted on the knurled portion, and the actuator 45 is driven by a signal from a control device 46 to rotate the male screw portion 43. You can also do it. In that case, the position of the cutter blade 29 can be adjusted by remote control, and the labor can be reduced. Further, the diameters of the holes 14, 14 ... Of various sizes are stored in the control device 46 in advance, and an automatic program programmed to move the cutter blade 29 to a position corresponding to the radius of each hole 14, 14 ... The actuator 45 can be automatically driven by control. Although not shown,
Instead of the male screw part 43, a hydraulic actuator may be mounted and the arm part 41 may be slid by driving the hydraulic actuator.

As shown in FIG. 6, the central shaft body 30 is
A piston 32 that moves up and down along the axis of the spindle 27, a piston rod 33 fixed to the lower portion of the piston, and a plurality of downwardly and equidistantly pivotally mounted so as to surround the piston rod 33. Arms 34, 34, 3
4 and. In the figure, reference numeral 35 is a cylinder, the lower end of an air pipe 36 penetrating the inside of the spindle 27 is connected to the upper portion of the cylinder 35, and the piston rod is connected to the lower portion of the cylinder 35. A plurality of pins 37, 37, 37 are horizontally provided around 33, and the arm 34 is pivotally attached to each pin 37.

Further, the arm 34 has a protrusion 34a protruding inward from the vicinity of the pivot portion, and a lower end of the arm 34 protruding outward to form a claw 34b.
A cam groove 33a is provided on the piston rod 33, and the protrusion 34a of the arm is engaged with the cam groove 33a. Further, a spring 38 is interposed below the piston 32 so as to surround the piston rod 33, and the spring force of the spring 38 urges the piston 32 upward. The air pipe 36
Is rotatably arranged along the axis of the spindle 27. The driving force of the induction motor 21 is reduced by the gear head 22, and the lifting mechanism 23 causes the air pipe 36 to move up and down in the spindle 27. Regardless of the rotation of 27, the central shaft body 30 moves up and down integrally with the air pipe 36.

When high pressure air is sent from the upper portion of the air pipe 36, the air pressure pushes the piston 32 downward, and the piston 32 descends against the bias of the spring 38. Therefore, as shown by the arrow, the piston rod 33 and the cam groove 33a move downward, and the protrusion 34a of the arm engaging with the cam groove 33a is pushed downward. Therefore, as shown by the arrow, the lower end portion of the arm 34 pivots outward with the pin 37 as an axis. Thus, as shown in FIG. 7, the arm 34 hangs down substantially vertically with respect to the pin 37, and the claw portion 34 b of the arm becomes the cylinder 35.
The central shaft body 30 is in a state in which the diameter of the central shaft body 30 is expanded.

On the other hand, if the air pressure from the air pipe 36 is released in the state where the central shaft body 30 of FIG. 7 is expanded, the piston 32 is moved upward by the biasing force of the spring 38 by the action opposite to the above. When pushed back, the piston rod 33 and the cam groove 33a move upward, and the protrusion 34a of the arm that engages with the cam groove 33a is pushed upward. Thus,
The lower end of the arm 34 pivots inward around the pin 37, and the central shaft body 30 returns to the reduced diameter state as shown in FIG.

Next, using the punching device 20 of the present invention,
A procedure for opening holes for mounting various parts at predetermined positions of a synthetic resin tank will be described. First, as shown in FIG. 8, the frame 28 is adjusted so that the position of the cutter blade 29 has a predetermined hole diameter with the spindle 27 as the center of rotation. Then, the central shaft body 30 is inserted in a reduced diameter state into the pilot hole 16 which is preliminarily opened at a predetermined position of the tank 11, and the central shaft body 30 is lowered integrally with the air pipe 36 to lower the pilot hole 16. Penetrate to the bottom surface.

Then, as shown in FIG. 9, when high-pressure air is sent from the air pipe 36, the piston 32 is pushed downward, so that the lower end portion of the arm 34 pivots outward as described above. , The arm claw 34b is the cylinder 35
Of the central shaft body 30 and the claw portion 34b supports the lower surface portion of the prepared hole 16. At the same time, the cutter blade 29 is rotated and lowered together with the spindle 27 to open a hole 14 having a predetermined diameter as shown in FIG. Since the cutter blade 29 is a knife-shaped blade, chips are not generated unlike the conventional cutting tool, and the drilling work is performed very efficiently.

Then, as shown in FIG. 11, when the drill unit 26 is raised, a hole 14 having a predetermined diameter is opened at a predetermined position of the tank 11, and the cutting piece 39 cut out by the cutter blade 29 is centered. It is removed from the tank 11 while being held by the shaft body 30. After that, as shown in FIG. 12, if the drill unit 26 is moved to the side and the air pressure from the air pipe 36 is released, the piston 32 is pushed back upward by the bias of the spring 38, and as described above. , The lower end portion of the arm 34 rotates inward, and the central shaft body 3
0 returns to the reduced diameter state. Therefore, the claw portion 34b of the arm is disengaged from the pilot hole 16 and the cutting piece 39 falls downward.

After the hole 14 having a predetermined diameter is opened in the tank 11 by the above procedure, the drill unit 26 is manually moved to another position to adjust the position of the cutter blade 29 again. , Etc. can also be performed by automatic control. For example, all the holes 14 to be opened in the tank 11,
The positions of 14 ... And their respective sizes are stored in the control device 46 in advance, and the automatic control programmed to move the drill unit 26 to the respective hole positions is performed.
First, while moving the drill unit 26 above a predetermined hole position, by driving the actuator 45 described above,
The position of the cutter blade 29 is adjusted to the radius of the hole 14 having a predetermined diameter. Then, after the hole 14 having a predetermined diameter is opened by the procedure described above, the drill unit 26 is moved to the position separated from the tank 11 by the control device 46, and the lifting mechanism 23 is driven to remove the cutting piece 39. To do. After that, the drill unit 26 is moved above the new hole position by automatic control. By repeating such an operation, each of the holes 14, 14 ... Of the tank 11 can be opened by automatic control.

The present invention can be modified in various ways without departing from the spirit of the present invention, and it goes without saying that the present invention covers the modifications.

[0023]

As described in detail in the above-mentioned one embodiment, the invention according to claim 1 is such that a central shaft body is provided in a lower portion of a drill unit and is preliminarily opened at a predetermined position of a tank. If the central shaft is penetrated through the existing pilot hole and the spindle is rotated after adjusting the position of the cutter blade according to the predetermined hole diameter to be opened, the cutter blade that rotates together with the spindle is It is possible to rotate around and cut out a hole having a predetermined diameter. Therefore, the generation of chips can be prevented as much as possible.

According to a second aspect of the present invention, the frame body is provided with a main body portion, an arm portion, and a cutter blade holding portion, and the arm portion is slid by rotating a screw portion mounted on the main body portion. Can be made. Therefore, by adjusting the distance from the central shaft to the cutter blade, it is possible to open a hole having an arbitrary diameter on the tank surface according to the size of various parts.

[Brief description of drawings]

FIG. 1 is a front view of a punching device according to an embodiment of the present invention.

FIG. 2 is a side view of the frame body according to the embodiment of the present invention.

FIG. 3 shows an embodiment of the present invention, and is a partially cutaway front view of the frame body in a state where the arm portion is moving outward.

FIG. 4 is a partially cutaway front view of the frame body according to the embodiment of the present invention, in which the arm portion is moving inward.

FIG. 5 is a partially cutaway front view of a frame body in which an actuator is mounted on an arm portion according to the embodiment of the present invention.

FIG. 6 shows an embodiment of the present invention, in which (a) is a vertical cross-sectional view of a central shaft body in a reduced diameter state, and (b) is a bottom view of the same.

7A and 7B show an embodiment of the present invention, in which FIG. 7A is a vertical cross-sectional view of a central shaft body in a diameter-expanded state, and FIG.

FIG. 8 is an explanatory view showing an embodiment of the present invention and explaining a procedure of a punching step.

FIG. 9 is an explanatory view showing an embodiment of the present invention and explaining a procedure of a punching step.

FIG. 10 is an explanatory view showing an embodiment of the present invention and explaining a procedure of a punching step.

FIG. 11 is an explanatory view showing an embodiment of the present invention and explaining a procedure of a punching step.

FIG. 12 is an explanatory view showing an embodiment of the present invention and explaining a procedure of a punching step.

FIG. 13 is a front view showing a conventional punching device.

FIG. 14 is a partially cutaway front view showing a state where a tank is being drilled by a conventional drilling device.

FIG. 15A is a perspective view showing a part of a tank in which a pilot hole is formed in advance. (B) An enlarged longitudinal sectional view of the pilot hole portion.

[Explanation of symbols]

11 tanks 14 holes 16 pilot hole 20 Drilling device 26 drill units 27 spindles 28 frame 29 cutter blade 30 central shaft 40 body 41 Arm 42 Cutter blade holder 43 Male Thread 44 Female thread part

Claims (2)

[Claims] 1. A drill unit is provided on a tank mounted on a pedestal in order to open holes for mounting various parts at predetermined locations on the tank, and the tank is mounted on the tank by the drill unit. In a hole drilling device for a tank configured to drill a predetermined hole, the drill unit includes a frame body fixed to a spindle, a central shaft body provided in a lower portion of the frame body, and a center thereof. A cutter blade attached to the frame body at a predetermined distance from the shaft body, and the cutter blade rotating around the central shaft body as a center of rotation is brought into contact with the surface of the tank to open a hole of a predetermined diameter. A device for punching a tank, characterized in that 2. A main body part fixed to the spindle, an arm part slidably attached to the main body part in a horizontal direction, and a lower part of the arm part fixed to the frame body. A cutter blade holding portion is provided, and one end of a screw portion rotatably and laterally attached to the main body portion is screwed into the arm portion, and the screw portion is rotated, whereby the arm portion with respect to the main body portion is rotated. The hole punching device for a tank according to claim 1, wherein the portion is slid so that the distance from the central shaft body to the cutter blade can be adjusted.