JP5450163B2 - Pipe cutting and grooving equipment - Google Patents

Description

  The present invention cuts the ends of existing buried pipes such as ductile pipes with a relatively small diameter and other pipes at construction sites such as waterworks and civil works, and at the same time, creates a circumferential groove on the edge of the pipe. The present invention relates to a tube cutting and grooving device for forming.

  For example, water supply pipes for general waterworks are laid by connecting steel pipes of a certain length with connecting metal fittings. It is necessary to cut the tube. Further, a peripheral groove for joining the connecting hardware is required on the outer peripheral surface near the end of the cut pipe, and the cutting and grooving are a series of operations.

  Conventionally, in the above-mentioned cutting and circumferential groove processing at a waterworks pipe laying site, for example, JP-A-8-25127 (Patent Document 1), Japanese Patent No. 2676331 (Patent Document 2), Japanese Patent No. 3944441 (Patent Document) Cutting machines such as those described in 3) have been used.

  All of these cutting machines are held on the outer peripheral surface of the pipe using a roller chain so that the pipe to be processed can be circulated. Cutting and grooving are performed automatically at the same time. The driving force during the orbiting operation is transmitted to the pipe via a caterpillar device provided in the cutting machine, and the cutting machine smoothly circulates together with the roller-attached chain as the roller of the roller-attached chain rotates.

  By the way, the cutting position and the grooving position are required to be in a plane perpendicular to the central axis of the pipe, and when the cutting machine goes around the pipe and returns to the original position, there is virtually no displacement. It is necessary to be in a state that can be said. Therefore, in many cases, in order to eliminate this positional shift, a configuration is adopted in which an annular circular guide rail is fitted to the pipe and the cutting machine circulates along the circular guide rail (see Patent Document 2). ).

The tube cutting and grooving work using this conventional cutting device is performed by the following steps.
1) Install a guide rail around the pipe.
2) A cutting machine is arranged on the outer periphery of the pipe.
3) Adjust the caterpillar device of the cutting machine.
4) Attach one end of the chain with roller to one end of the caterpillar device.
5) Turn the other end of the chain with roller around the pipe and hook it onto the hook of the cutter.
6) Engage the guide wheel of the cutting machine with the round guide rail.
7) Tighten the chain with rollers using chain tie toner.
8) Rotate the cutting machine using the caterpillar device. This circular operation is performed in an idle state in which the blade is not brought into contact with the pipe.
9) Check that the cutting edge of the disc-shaped cutter is in the required processing position. When the position is deviated, after the position is corrected, the rotating operation in the idle state is performed again.
10) Check the tension of the chain with roller. If it is weak, operate the chain tie toner to adjust the tension.
11) The cutting blade is brought into contact with the outer peripheral surface of the pipe to start cutting the pipe.
12) While rotating the cutting machine in this state, the tube is cut with a cutting blade and the tube is cut with a grooving blade.

  In the above conventional process, in particular, a lot of time is spent on the steps 1), 3), 6) and 7) which are preparation steps before the cutting machine circulates. In addition, since it is a fully automatic cutting and grooving device, the structure is complicated, the weight is increased, and it is naturally expensive.

  Therefore, a cutting machine having a simple configuration by human operation is also used. In other words, it is a cutter belonging to an electric tool, which is held by holding the cutting machine by hand, hitting the blade against the outer peripheral surface of the tube, and kicking the tube with a foot. This cutting machine has a considerably simple structure as compared with the above-described fully automatic device, and can be supplied at a considerably low price.

  However, the work in the case of the cutting machine with this simple configuration is performed while supporting the weight with one foot while keeping the posture of the middle waist while kicking the tube with the other foot. Since it accumulates, it is difficult to process many pipes in a short time. In addition, since the cutting tool and the circumferential groove forming tool are different, cutting and circumferential groove formation cannot be performed in a series of steps, and there is a significant problem in terms of work efficiency.

JP-A-8-25127 Japanese Patent No. 2676331 Japanese Patent No. 3944441

  The present invention has been made in view of the above problems in the conventional tube cutting work, and can be supplied at a low cost with a simple configuration and can be operated in an easy posture by standing without burdening the operator. It is an object of the present invention to provide a pipe cutting and grooving device that can cut a pipe end and form a circumferential groove with a simple operation within a short time in a series of steps, and has high work efficiency.

  According to a first aspect of the present invention for solving the above-described problem, the end of the tube is moved relatively along the outer peripheral surface of the tube while being guided by a circular guide rail fixed so as to surround the tube. An apparatus for cutting and grooving a portion, comprising: a substrate; a cutting means installed on one side of the substrate; and a travel support means installed on the other side of the substrate. The inserting means is pivoted between the substrate and the swinging cover, a swinging cover pivoted on the substrate, an operating means installed on the substrate to apply a load to the swinging cover, and the swinging cover. An urging means for urging the oscillating cover in one turning direction, a blade portion including a cutting blade and a groove cutting blade and oscillating integrally with the oscillating cover, and attached to the oscillating cover. And blade driving means for rotationally driving the blade, the travel support means A pair of rolling wheels installed on the substrate itself and in contact with the outer peripheral surface of the tube, and a pair of swing arms attached to the substrate are sandwiched between the rotation guide rails via a wheel mounting member. A pipe comprising: a guide wheel installed on a base plate; and a pair of rolling wheels installed on a lower part of an end face plate fixed between end portions of the swing arm and abutting against an outer peripheral surface of the pipe. It is a cutting device.

  In a preferred embodiment, the travel support means further includes a roller chain wound around the tube from one of the swing arms and suspended over the other swing arm.

  In a preferred embodiment, the pair of swing arms is installed so as to be swingable with respect to the substrate, so that the opening degree between the arms can be selected and changed. A plurality of types having different intervals between the pair of rolling wheels installed in the lower part thereof are prepared, and a desired one of them is selected and can be exchanged between the end portions of the wheel mounting member.

  In a preferred embodiment, the operation means for applying a load to the swing cover is capable of applying a desired load to the swing cover steplessly. For example, the operation means includes: The fixed nut fixed to the angle member attached to the substrate, a screw rod screwed into the fixed nut, and an operation rod for rotating the screw rod forward and backward, and the lower end of the screw rod is always the rocking cover It is assumed that it abuts on the upper surface. The swing cover is configured to be connectable to the dust suction pipe so as to open to the inside.

  The present invention is as described above, can be supplied at a low cost with a simple configuration, and can be easily attached to the pipe to be processed. After the attachment, the operator can simply hold the operating rod in a standing position. In addition, the tube can be continuously cut and grooved in a relatively short time by simply rotating it in a timely manner and moving it back and forth by placing one foot on the tube. The work can be performed with an easy posture and without any special force.

It is a front side perspective view which shows the structure of one Embodiment of this invention. It is a back side left direction perspective view showing the composition of one embodiment of the present invention. It is a back side right direction perspective view showing the composition of one embodiment of the present invention. It is a bottom view which shows the structure of one Embodiment of this invention. It is a back side lower direction perspective view showing the composition of one embodiment of the present invention. It is a front side perspective view in the state where a part of one embodiment of the present invention was removed. It is a front view which shows the structural example of the end surface board in one Embodiment of this invention. It is a perspective view which shows the installation state to the pipe | tube of the pipe | tube cutting / grooving apparatus which concerns on this invention. It is a perspective view which shows the usage method of the cutting / grooving apparatus of the pipe | tube which concerns on this invention.

  A mode for carrying out the present invention will be described with reference to the accompanying drawings. The tube cutting and grooving device (this device 1) according to the present invention is relatively moved along the outer peripheral surface of the tube 50 while being guided by the circular guide rail 51 fixed so as to surround the tube 50. An apparatus for cutting and grooving the end of the tube 50 in a continuous process, the substrate 2, the cutting means installed on one side of the substrate 2, and the traveling installed on the other side of the substrate 2. And supporting means.

  First, the cutting means will be described. The cutting means includes a swing cover 3 that swings with one end pivotally supported by the substrate 2, and an operating means that is installed on the substrate 2 and applies a load to the swing cover 3. And an urging means that is stretched between the substrate 2 and the oscillating cover 3 and urges the oscillating cover 3 in one turning direction, a cutting blade 4, a groove cutting blade 5, and a circular stopper 6. And a blade portion that swings integrally with the swing cover 3 and blade portion driving means that rotationally drives the blade portion.

  The swing cover 3 covers the blade portion from above, and one end portion thereof is pivotally attached to one side surface of the substrate 2 via the pivot shaft 7 (see particularly FIG. 3). One end of a return spring 8 which is a biasing means for biasing the swing cover 3 in one turning direction is fixed to the other end of the swing cover 3, and the other end of the return spring 8 is fixed to a side surface of the substrate 2. (See especially FIG. 2). The swing cover 3 is always strongly pulled upward by the action of the return spring 8. A dust suction hose 9 extending from the dust suction device can be connected to the swing cover 3 as required (see particularly FIG. 3).

  An operating means that acts on the upper surface of the swing cover 3 and applies a load is installed at a position above the swing cover 3 of the substrate 2. This operation means is preferably configured to be able to apply a desired load to the swing cover 3 in a stepless manner. For this purpose, the operating means includes a fixing nut 12 fixed to the angle member 11 attached to the substrate 2, a screw rod 13 screwed into the fixing nut 12, and an operating rod 14 that rotates the screw rod 13 forward and backward. (See FIGS. 1 to 3).

  The angle member 11 is U-shaped, the fixing nut 12 is fixed to the back side of the upper surface 11 a, the lower part of the screw rod 13 protrudes from the lower surface 11 b of the angle member 11, and the lower end thereof is always the swing cover 3. It is made to contact | abut on an upper surface.

  The screw rod 13 and the operation rod 14 are connected to each other by, for example, forming a pair of slide grooves 15 extending upward from the lower end of the operation rod 14 in a symmetrical manner, and sliding the screw rod 13 into each slide groove 15. A pin 16 that can be engaged is projected, and an operating rod 14 is put on the screw rod 13 from above, and the pin 16 is inserted into the slide groove 15 to be engaged (particularly, see FIGS. 2 and 3).

  Thus, as the operating rod 14 is rotated, the screw rod 13 can be rotated, so that the screw rod 13 that is fixed and does not rotate is screwed into the fixing nut 12. It moves up and down with the rotation. The swinging cover 3 is pushed down against the pulling force of the return spring 8 when lowered, and the swinging cover 3 is swung upward without being separated from the screw rod 13 by the pulling force of the return spring 8 when rising. To do. Thus, the operating rod 14 functions as a cutting amount adjusting lever, as will be described later.

  The blade portion covered by the swing cover 3 is set on the output shaft of the motor 18 with the cutting blade 4, the circular stopper 6 and the groove cutting blade 5 arranged coaxially in this order from the side of the motor 18 which is the blade portion driving means. (See FIG. 4). Needless to say, the distance between the cutting blade 4 and the groove cutting blade 5 corresponds to the distance from the end surface of the tube 50 after cutting to the peripheral groove 51 forming portion, and the diameter difference between the circular stopper 6 and the groove cutting blade 5 is engraved. Corresponds to the depth of the groove.

  The motor 18 swings integrally with the swing cover 3 while supporting the blade portion by fixing the motor case 19 to the swing cover 3. Reference numeral 20 denotes a handle provided in the motor case 19, which is used by being gripped when the apparatus 1 is moved.

  The traveling support means is provided on each of a pair of rolling wheels 21 that are installed at the lower part of the substrate 2 and abuts on the outer peripheral surface of the tube 50 and a pair of swing arms 22 and 23 that are attached to the substrate 2. A pair of guide wheels 24 and 25 installed so as to sandwich 51, and a pair of rolling wheels which are installed at the lower part of the end plate 26 fixed to the ends of the swing arms 22 and 23 and contact the outer peripheral surface of the pipe 50. And a moving wheel 27.

  The upper and lower swing arms 22 and 23 are pivoted by the substrate 2 so as to be swingable. A plurality of bolt holes 30 (typically three) are formed at predetermined intervals at both lower ends of the substrate 2, and bolt holes corresponding to the bolt holes 30 are formed below the swing arms 22 and 23. The fixing nut 29 is fixed to the back side of each bolt hole (see FIG. 3). The swing arms 22 and 23 are swung so that their bolt holes are aligned with any of the bolt holes 30, and the opening adjustment bolt 31 is inserted into them to be firmly screwed into the fixing nut 29 to be fixed at the swing position. Is done. In this way, the opening between the swing arms 22 and 23 can be adjusted in accordance with the diameter of the pipe 50 to be processed.

  Under the swing arms 22 and 23, wheel mounting members 32 and 33 formed by bending metal plates are symmetrically installed. In the one wheel mounting member 32, the pair of guide wheels 24 are pivotally supported at intervals corresponding to the width of the circulating guide rail 51, and in the other wheel mounting member 33, the pair of guide wheels 25 are connected to the circulating guide rail 51. It is supported at intervals corresponding to the width of.

  A hook 34 for hooking one end of the roller chain 38 is installed on one wheel mounting member 32, and a locking hole 36 for locking the other end of the roller chain 38 to the other wheel mounting member 33. A locking member 35 having the above is installed. A bolt 37 inserted into the locking hole 36 is fixed to one end of the roller chain 38, and a tightening nut 37a is screwed to a portion protruding from the locking hole 36 (see FIG. 8).

  As shown in FIG. 6, screw rods 39 project from the outer end surfaces of the wheel mounting members 32 and 33. The screw rod 39 is inserted into a screw hole 41 formed in the end face plate 26 (see FIG. 7), and a knob nut 40 is screwed into a tip portion protruding from the screw hole 41, whereby the end face plate 26 is turned into a wheel. It fixes between the attachment members 32 and 33 (refer FIG. 1, 7).

  As described above, the opening between the swing arms 22 and 23 can be adjusted according to the diameter of the pipe 50 to be processed, and the end face plate 26 can also be selectively exchanged correspondingly. Therefore, as the end face plate 26, for example, as shown in FIG. 7, a plurality of end face plates having different intervals between the rolling wheel 27 and the screw hole 41 are prepared (the number and the position thereof are the same as those of the swing arms 22 and 23). This corresponds to the number and position of the fixing nuts 29 and the bolt holes 30 for rocking positioning.) Thus, by changing to the end face plate 26 in which the intervals of the rolling wheels 27 are different in accordance with the diameter of the pipe 50 to be processed, the stable rotation operation of the apparatus 1 can be performed.

  In the figure, reference numeral 53 denotes a support base that rotatably supports the tube 50 during cutting and grooving operations, and the tube 50 is placed on a receiving roller 54 disposed on the upper surface of the support base 53. The tube 50 placed on the receiving roller 54 is rotated by a kicking operation with one foot of the operator.

  Next, a method of using the apparatus 1 having the above configuration will be described. In the use, first, the guide rail 51 is fixed at a predetermined position on the end portion of the pipe 50 placed on the receiving roller 54 by the same method as in the conventional case. And the opening degree between rocking | fluctuation arms 22 and 23 is adjusted so as to correspond to the diameter of the pipe | tube 50, and the end surface board 26 corresponding to it is attached.

  And this apparatus 1 is arranged on the pipe | tube 50, and each of the guide wheels 24 and 25 pinches | interposes the circumference | surroundings guide rail 51, and each of the rolling wheel 21 of the board | substrate 2 lower part and the rolling wheel 27 of the end surface board 26 lower part is each. Is brought into contact with the peripheral surface of the tube 50. In this state, the bolt 37 at one end of the roller chain 38 is passed through the locking hole 36 of the locking member 35, and the tightening nut 37a is loosely screwed. Then, the roller chain 38 is rotated under the pipe 50, pulled strongly to hook the hook adjacent portion to the hook 34, and in this state, the tightening nut 37a is strongly tightened to firmly wind the roller chain 38 around the pipe 50 ( (See FIG. 8).

  After the apparatus 1 is installed at the end of the tube 50 in this way, the operator holds the upper part of the operation rod 14 with the right hand with the left foot placed on the tube 50 and turns the operation rod 14, for example. (See FIG. 9). When the operation rod 14 is turned, the screw rod 13 locked to the slide groove 15 and the pin 16 is rotated, and the tip of the screw rod 13 that is in contact with the upper surface of the swing cover 3 is the upper surface of the swing cover 3. push. As a result, the swing cover 3 turns downward about the pivot 7 against the tensile force of the return spring 8, and eventually the cutting blade 4 of the blade portion comes into contact with the peripheral surface of the tube 50.

  When the motor 18 is operated in this state, the cutting blade 4 is driven to rotate, and the cutting of the cutting portion of the tube 50 is started. Then, by kicking the tube 50 with the foot, the incision over the entire circumference of the tube 50 proceeds. At that time, by smoothly kicking the tube 50 while moving the operating rod 14 back and forth, smooth cutting can be performed. Further, since the cutting blade 4 needs to be gradually lowered in order to advance the cutting, the operator performs an operation of rotating the operating rod 14 along with the kicking operation of the tube 50. By repeating the above operation, the cutting operation of the pipe 50 is completed.

  Next, the operating rod 14 is further rotated to bring the groove cutting blade 5 into contact with the outer peripheral surface of the pipe 50, and the groove cutting operation is performed in the same manner as in the case of the above cutting operation. This grooving operation is performed until the circular stopper 6 having a smaller diameter than the grooving blade 5 comes into contact with the outer peripheral surface of the pipe 50, and then the motor 18 is stopped when the idling state is reached, and the operation ends. The removal of the device 1 after the end of the work may be performed in the reverse manner to the above attachment.

  In addition to the method of performing rotation driving of the shaft of the blade portion by the motor 18 directly connected thereto as in the illustrated example, the method of transmitting power from an external engine, a motor, or the like via a flexible shaft. Can also be done. Further, the rotational driving of the tube 50 on the support base 53 is not limited to the kicking method using the operator's foot as described above, and any other mechanical driving method may be employed.

  As described above, the present apparatus 1 has a relatively simple configuration and can be easily attached to the pipe 50. After the attachment, the operator simply holds the operation rod 14 in a standing position and rotates it in a timely manner. In addition, it is possible to continuously perform the cutting operation and the grooving operation of the tube 50 in a relatively short time by simply performing a kicking operation in which one foot is placed on the tube 50 and moved back and forth. In addition, the work is very useful and can be performed with an easy posture and without particularly requiring power or skill.

  Although the present invention has been described in some detail with respect to its most preferred embodiments, it will be apparent that a wide variety of different embodiments can be constructed without departing from the spirit and scope of the invention, the invention being defined by the appended claims. It is not restricted to the specific embodiment other than limiting in.

1 Device 2 Substrate 3 Swing cover 4 Cutting blade 5 Groove cutting blade 6 Circular stopper 8 Return spring 13 Screw rod 14 Operation rod 15 Slide groove 16 Pin 18 Motor 22, 23 Swing arm 24, 25 Guide wheel 26 End plate 27 Rolling wheels 32 and 33 Wheel mounting member 38 Roller chain 50 Pipe 51 Circumferential guide rail 52 Circumferential groove 53 Support base

Claims (7)

An apparatus for cutting and grooving the end of the tube by moving relatively along the outer peripheral surface of the tube while being guided by a circular guide rail fixed so as to surround the tube,
A board, a cutting means installed on one side of the board, and a running support means installed on the other side of the board,
The notch means is a swinging cover pivoted on the substrate and swinging, an operating means installed on the substrate to apply a load to the swinging cover, and a tension between the substrate and the swinging cover. An urging means for urging the oscillating cover in one turning direction; a blade portion including a cutting blade and a groove cutting blade and oscillating integrally with the oscillating cover; and A blade portion drive means that is attached and rotates the blade portion;
The travel support means is a pair of rolling wheels that are installed on the substrate itself and abuts against the outer peripheral surface of the tube, and a pair of swing arms that are attached to the substrate. It comprises a guide wheel installed so as to sandwich the circular guide rail, and a pair of rolling wheels installed at the lower part of the end plate fixed between the end portions of the swing arm and contacting the outer peripheral surface of the pipe. A tube cutting and grooving device characterized by that.   2. The tube cutting and grooving device according to claim 1, wherein the travel support means further includes a roller chain wound around the tube from one of the swing arms and suspended over the other swing arm.   3. The tube cutting / groove according to claim 1 or 2, wherein the pair of swing arms is installed so as to be swingable with respect to the substrate, whereby the opening degree between the arms can be selected and changed. Cutting device.   As the end face plate, a plurality of types having different intervals between the pair of rolling wheels installed in the lower part thereof are prepared, and a desired one of them can be selected and exchanged between the end portions of the wheel mounting member. The tube cutting and grooving device according to claim 3.   The tube cutting / cutting tube according to any one of claims 1 to 4, wherein the operating means for applying a load to the swing cover is capable of applying a desired load to the swing cover steplessly. Grooving device.   The operation means includes a fixing nut fixed to an angle member attached to the substrate, a screw rod screwed into the fixing nut, and an operation rod for rotating the screw rod forward and backward, and a lower end of the screw rod is 6. The tube cutting / grooving device according to claim 5, wherein the tube cutting / grooving device is always in contact with the upper surface of the swing cover.   The tube cutting / grooving device according to any one of claims 1 to 6, wherein a dust suction pipe can be connected to the swing cover so as to open to the inside thereof.

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