JPH0234727B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a perforation device for corrugated pipes, and particularly for manufacturing an underdrain drainage pipe by punching a large number of holes in a blow-molded non-porous synthetic resin corrugated pipe. The present invention relates to a punching device that is suitably employed in various cases.

(Prior Art) A recent precedent example of this type of drilling device is one disclosed in Japanese Patent Application Laid-open No. 134292/1983. That is, as shown in FIG. 7, this device has a large number of screw members 103 equipped with cutting tools 102 protruding from threads 101 around a corrugated pipe passage, and the thread of each rotating screw member 103 is The mountain 101 is corrugated pipe 104
While feeding the corrugated tube 104 into the circumferential wall recess, the cutting tool 102 notches the circumferential wall recess to form an elongated notch hole 105.

(Problems to be Solved by the Invention) However, in the punching device as described above, the corrugated tube 104 is continuously fed without stopping, whereas the cutting tool 102 is moved in the feeding direction of the corrugated tube 104. Since the corrugated tube 104 is configured to rotate at a fixed position without any rotation, the recessed portion of the circumferential wall of the corrugated tube 104 cannot be cut in the circumferential direction (direction orthogonal to the axis of the corrugated tube 104), and an oblique notch hole 105 is formed. There's a problem. That is, the cutting tool 102 is connected to the corrugated tube 10.
The cutout hole 105 is the distance that the corrugated pipe 104 moves from the time when the peripheral wall recess of No. 4 is started until the end of the cutout.
is formed diagonally.

Moreover, in the above-mentioned drilling device, since the screw thread 101 of the rotating screw member 103 is engaged with the peripheral wall recess of the corrugated tube 104 and the corrugated tube 104 is sent, the screw member 103 is brought into close contact with the corrugated tube 104. This makes it difficult to smoothly carry out the feeding operation of the corrugated tube 104. Therefore, since some gap is required between the corrugated tube 104 and the threaded member 103, even if an attempt is made to prevent the corrugated tube 104 from rotating by alternating the rotation direction of each threaded member 103, it is actually difficult to prevent the corrugated tube 104 from rotating. It is difficult to prevent this, and since the corrugated tube 104 inevitably rotates, there is a problem that the position of the notch hole 1055 shifts.

In this way, if the notch hole 105 is formed in an oblique direction and the position of the notch hole 105 is shifted,
This is not desirable because it looks bad and reduces the product value.

The present invention aims to solve these problems.

(Means for Solving the Problems) That is, in order to solve the above problems, the corrugated pipe perforation device according to the present invention includes a transporting machine that transports the corrugated pipe along its axis, and a transporting machine for transporting the corrugated pipe. A carriage that repeats forward movement in one direction and backward movement in the opposite direction and is controlled so that the forward movement speed is equal to the moving speed of the corrugated tube, and a carriage that is equipped with this carriage and that moves the corrugated tube twice when the carriage moves forward. A set of corrugated pipe gripping tools consisting of a pair of left and right gripping pieces each having semicircular recesses facing each other for gripping at certain points; The corrugated tube is provided with a notch that cuts the corrugated tube in a direction perpendicular to its axis when the tube moves forward.

(Function) With this configuration, the notch moves forward with the carriage at a speed equal to the feeding speed of the corrugated tube, and the relative speed between the notch and the corrugated tube becomes zero, and during this forward movement, the corrugated tube moves forward. Since the notch is made by the notch tool in a direction perpendicular to the axis, the notch hole is always formed in the circumferential direction of the corrugated tube. Moreover, during this forward movement, both sides of the notch of the corrugated tube are firmly gripped by a pair of gripping tools, which are made up of a pair of left and right gripping pieces, which are formed with semicircular recesses equipped on the carriage facing each other. Since the corrugated tube is sufficiently prevented from rotating due to the impact caused by the notch, the notch hole is always formed at a constant position. Therefore, it is possible to obtain a perforated corrugated pipe with a good appearance and high commercial value, in which a large number of elongated notches cut out in the circumferential direction are arranged in an orderly manner.

Hereinafter, the present invention will be explained in detail with reference to Examples.

(Embodiment) Fig. 1 is a front view of an embodiment of the present invention, and Fig. 2 is a plan view of the same embodiment, where A is a corrugated pipe;
2 is a corrugated tube transfer device, 3 is a transfer speed detector, 4 and 5 are carriages, 6 is a drive source storage box, and 7 is a rotating drum.

A transfer device 2 installed at one end of the base 1 (the left end in the figure) is used to transfer the corrugated tube A along its axis, and has a V-shaped recessed roll surface.
It is equipped with 8 rolls. Four bearing members 9 that receive the shafts of these rolls are vertically slidably mounted on a pair of support frames 10 erected on both sides of the corrugated tube A, and two shaft bearing members 9 with handles are attached. 11 are inserted vertically. This shaft 11 has threaded portions 12 and 13 formed at two locations along the way in opposite directions.
2 and 13 are screwed into screw holes of the upper and lower bearing members 9, respectively. Therefore, when the shaft 11 is rotated by turning the handle, the upper and lower bearing members 9 approach each other, and when rotated in the opposite direction, they move away from each other, so that the interval between the two upper and lower rolls 8 can be freely adjusted, making it optimal. The corrugated pipe A can be sandwiched from above and below with the roll pressure of . The rolls are driven by a motor 15 connected via a reducer 14, and when the motor 15 operates, the upper and lower rolls 8 rotate at a constant speed in opposite directions as shown by arrows a and b. , the corrugated tube A is transported in the direction of arrow X.

The transfer speed detector 3 provided at the other end of the base 1 (the right end in the figure) is connected to the presser roll 16 and the corrugated tube A.
Three rotary furnace rolls 1 installed on the lower side with the
7, 18, 19, an endless belt 20 wound around these rolls, and a tacho-generator (not shown) connected to the rotating shaft of these rolls. Thus, the corrugated tube A is held between the top and bottom. Therefore, the corrugated tube A is moved by the above transfer machine 2.
is transferred in the direction of arrow X, the endless belt 20 rotates at the same speed as the transfer speed, and each roll 17,
18 and 19 also rotate, and the tachogenerator generates an electromotive force according to the roll rotation speed. The electromotive force thus generated is sent to a control circuit for the drive motor of the rotary drum 7 that reciprocates the carriages 4 and 5, as will be described later, and the rotational speed of the drive motor is controlled.

The carriages 4 and 5 are mounted on two rails 22 laid on a table 21 in parallel with the axis of the corrugated tube A.
It is slidably placed on the top and connected by two connecting rods 23 on both sides. A rotating drum 7 driven by a motor (not shown) in a drive source storage box 6 is provided below one of the carriages 4 . As shown in FIG. 6, this rotating drum 7 has an angle θ with respect to the circumferential direction of the drum.
A convex cam 24 is provided around the drum, and this convex cam 24 protrudes from the opening 25 of the table 21 and is engaged with an inverted U-shaped groove member 26 on the bottom surface of the carriage 4. There is. Therefore, when this rotary drum 7 rotates, the carriage 4 and the carriage 5 connected thereto reciprocate by a distance W in the axial direction of the corrugated tube A on the rail 22. The speed of reciprocation is determined by the rotating drum 7.
In this device, the electromotive force generated by the tachometer generator of the transfer speed detector 3 described above is sent to the control circuit of the rotary drum drive motor in the drive source storage box 6. By automatically controlling the rotational speed of the motor, the carriages 4 and 5 are configured to move forward in the transfer direction at a speed equal to the transfer speed of the corrugated tube A, and to move back in the opposite direction.

The carriages 4 and 5 are both box-shaped, and the interior of one of the carriages 4 is divided into three inner chambers 28, 28 and 28 by two partition plates 27, as shown in FIGS.
It is divided into 29 and 30 parts. In the center of these partition plates and the carriage side plates on both sides,
A corrugated tube passage hole 31 is formed in each corrugated tube A.
can pass through the carriage.

In the inner chamber 29 at the center, four notches 32 are arranged vertically and horizontally to surround the corrugated tube A, and in the inner chambers 28 and 30 on both sides, an internal gear 33 and a gripping tool 34 are arranged. They are decorated one by one. This notch 32 has a pair of blades 35 (the spacing between the blades is set to twice the pitch of the corrugated tube A) that protrudes in a direction perpendicular to the axis of the corrugated tube A. A shaft 36 is rotatably supported by bearings 37 provided on the partition plates 27 on both sides, and gears 38 at both ends of the shaft 36 mesh with the inner teeth of both internal gears 33. The outer teeth of both internal gears 33 are drive gears 39, respectively.
The shaft 40 of the drive gear 39 is connected to a motor (not shown) in the drive source storage box 6. When the motor is activated, all four notches 32 rotate at a constant speed, and the tips of the respective blades 35 partially cut out the concave portion of the circumferential wall of the corrugated pipe A. As shown in FIG. 5, the protruding directions of the blades 35 of each notch tool 32 are shifted by 90 degrees so that the corrugated tube A is notched at the top, bottom, left and right at the same time. Furthermore, the shafts 40 of the respective drive gears 39 and the shaft 41 of the rotary drum 7 are connected by interlocking gears (not shown) in the drive source storage box 6 to keep the rotation ratio constant, so that the carriage 4 is connected to the corrugated tube A, etc. When moving forward in the corrugated pipe transfer direction at high speed, each notch 32
The blades 35 turn half a turn toward the corrugated tube as shown by the solid line arrows in FIG. It is structured as follows. Therefore, when the carriage 4 is moving forward at a constant speed in the corrugated tube transfer direction, that is, when the relative speed between the corrugated tube A and the carriage 4 is zero, the corrugated tube A is cut out by each notch 3.
Since the tip of the blade 35 of No. 2 is cut in a direction perpendicular to the axis of the corrugated tube, the elongated notch holes formed at the top, bottom, left and right of the circumferential wall recess of the corrugated tube A are always aligned with the circumferential direction of the corrugated tube A, unlike the conventional device. The notch holes are not formed diagonally as in the case of

The gripping tools 34 housed in the inner chambers 28 and 30 on both sides of the carriage 4 are of a two-piece type with a pair of left and right gripping pieces 42, as shown in FIG. The upper end is the carriage 4
They are each pivotally mounted to a mounting base 43 fixed to the top plate of the. A semicircular recess 44 for gripping the corrugated tube A is formed in the lower part of these gripping pieces 42 to face each other, and a groove 45 (see FIG. 3) into which the peripheral wall recess of the corrugated tube A fits is formed. ) is formed. Further, semicircular recesses 46 for passing the shaft 36 of the cutout tool 32 are formed in the upper portions of these gripping pieces 42, and a compression spring 47 and an electromagnet 48 are provided between both gripping pieces 42. , shock absorber 49
etc. are interposed. This electromagnet 48 is a sensor (not shown) that detects the transport direction of the carriage 4.
As a result, the carriage 4 is energized only when it moves forward in the corrugated tube transport direction.
When the carriage 4 moves back in the direction opposite to the direction in which the corrugated pipe is transferred, the electromagnet 48 is not energized, so both gripping pieces 42 are attached to the compression spring 4.
With the force of 7, it expands until it touches the left and right legs 50 of the mounting base 43 as shown by the dashed line in FIG.
Although the corrugated tube A is not gripped, when the carriage 4 moves forward in the corrugated tube transfer direction, the energized electromagnet 4
Both gripping pieces 42 are closed together by the magnetic force of the gripping piece 8, and the corrugated tube A is firmly gripped by the recess 44 of the gripping piece, making it impossible to rotate. In this way, when the carriage 4 moves forward to cut out the corrugated tube A, the corrugated tube A is rotated at two positions on both sides of the notched portion by a pair of gripping tools 34 provided in the inner chambers 28 and 30 on both sides. If it is gripped in an unsteady manner, the position of the notched hole will not shift in the circumferential direction of the corrugated tube A, so it is possible to obtain a perforated corrugated tube with a high commercial price in which a large number of notched holes are aligned in the axial direction of the corrugated tube A. can.

The interior of the other carriage 5 is also constructed substantially in the same manner as described above, with the only difference being that four notches are arranged diagonally on all sides to surround the corrugated tube A. . Therefore, the corrugated tube A is cut out in the carriage 4 at four locations on the top, bottom, left and right.
Next, four notches are made using the notch tool in the other carriage 5: the upper right, the lower right, the upper left, and the lower left, resulting in eight notched holes.

In addition, the inner chamber 29 in the center of these carriages 4 and 5
The chips accumulated in the inner chamber 29 are removed by suction through a suction duct 51 (see FIGS. 2 and 5) connected to the inner chamber 29.

(Effects) As can be understood from the above explanation, according to the device of the present invention, the notch tool moves forward together with the carriage at a speed equal to the feeding speed of the corrugated tube, and the relative speed between the notch tool and the corrugated tube is zero. Sometimes, the corrugated tube is notched with the notch tool in a direction perpendicular to its axis, so the notched hole is always formed in the circumferential direction of the corrugated tube.
Moreover, during this forward movement, both sides of the notch of the corrugated tube are firmly gripped by a pair of gripping tools, which are made up of a pair of left and right gripping pieces, which are formed with semicircular recesses equipped on the carriage facing each other. Since the corrugated tube is sufficiently prevented from rotating due to the impact caused by the notch, the notch hole is always formed at a constant position. Therefore, the device of the present invention has the remarkable effect that it is possible to obtain a perforated corrugated tube with a good appearance and high commercial value, in which a large number of elongated notched holes cut out in the circumferential direction are arranged in an orderly manner in the axial direction of the corrugated tube. .

[Brief explanation of drawings]

Fig. 1 is a front view of an embodiment of the present invention, Fig. 2 is a plan view of the same embodiment, Fig. 3 is a horizontal sectional view taken along the - line in Fig. 1, and Fig. 4 is a sectional view taken along the - line in Fig. 2. 5 is a sectional view taken along the line -- in FIG. 2, FIG. 6 is a partial explanatory view of the same embodiment, and FIG. 7 is a sectional view of the conventional example. 2... Transfer machine, 3... Transfer speed detector, 4, 5
...carriage, 32...notch tool, 34...gripping tool, A...corrugated tube.

Claims (1)

[Claims] 1. A transfer machine that transfers a corrugated tube along its axis, and a device that repeatedly moves the corrugated tube forward in the transfer direction and backward in the opposite direction, and is controlled so that the forward movement speed is equal to the transfer speed of the corrugated tube. a corrugated tube gripper, which is equipped on the carriage and includes a pair of left and right gripping pieces formed with opposing semicircular recesses for gripping the corrugated tube at two places when the carriage moves forward; , a corrugated pipe punching tool, characterized in that it is equipped with a notch tool located on the carriage between the pair of gripping tools, and which cuts the corrugated pipe in a direction orthogonal to the axis of the corrugated pipe when the carriage moves forward. Device.