JP5839569B2 - Pipe cutting jig - Google Patents

Description

  The present invention relates to a pipe cutting jig for cutting a communication pipe in a narrow space where a cable is accommodated.

  When cutting communication pipes such as bridges by repair, the cutting work is carried out with a dedicated cutting tool (cutting tool) in order not to damage the cable accommodated in the pipe. The general structure of the dedicated cutting tool is such that the blade part to be cut does not reach the cable in the pipeline, and the cutting work is carried out without individually protecting the cable. Yes.

  FIG. 11 is a diagram for explaining a positional relationship with another pipe line when the pipe line is cut with a dedicated cutting tool. Although the space | interval of the pipe line 1 which can use the exclusive cutting tube tool 20 has some differences with tools, as shown in FIG. 11, generally 3.5 cm or more is required. Therefore, when the interval of the pipe line 1 is 3.5 cm or less, it is difficult to use the dedicated cutting tool 20.

  In such a case, as shown in FIG. 12, a wedge 26 is driven between the pipes in a narrow space where the distance between the pipes 1 is 3.5 cm or less, and the mutual cutting distance between the pipes is increased. 20 is set and cutting work is performed.

  Patent Document 1 discloses a cable housing including a chain that can be wound around the outer peripheral surface of a cable housing tube, and a number of serrated cutters provided along the length direction of the chain. A tube cutting device is disclosed.

JP 2000-263316 A

  However, as shown in FIG. 13, it is impossible to increase the mutual space between the pipes by driving the wedges 26 at a place where the distance between the pipes is narrow at the time of the abutment 25 of the bridge extension pipe. In some cases, the cut tube tool 20 cannot be set. Therefore, since it is difficult to use a dedicated cutting tube tool, the cutting work cannot be performed and repair may not be performed.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a pipe that can perform a cutting operation without increasing the mutual interval of the pipes even in a place where the pipe gap is narrow. It is to provide a road cutting jig.

In order to achieve the above object, the present invention provides a driving device that generates a rotational driving force, a gear device that is arranged so as to surround an outer peripheral surface of a pipeline, and that receives the rotational driving force from the driving device, and the pipeline A cutting device that is disposed so as to surround the outer peripheral surface and rotates integrally with the gear device to cut the pipe, and the cutting device includes a cutter. is composed of a plurality of divided bodies, the coupling split body to be in contact with the cutter on the outer circumferential surface of the conduit disposed on the outer circumferential surface of the pipe, the cutter, the thickness of the pipe line cutting jig cuts adjusting spring for adjusting the response was cut depth is characterized that you have installed.

  According to the present invention, even when a dedicated cutting tool cannot be used in a place where the pipe interval is narrow, a cutting operation for repair can be performed without increasing the mutual interval of the pipes.

  Moreover, since this invention cannot use a cut-tube tool, it can carry out safe repair work against defective equipment and unstable equipment.

It is a front view of a pipe line cutting jig when the pipe line cutting jig which concerns on embodiment of this invention is attached to the pipe line to cut | disconnect. FIG. 3 is an arrow view seen from the B-B ′ line in FIG. 1. It is the arrow line view seen from the A-A 'line of FIG. It is a side view of a cutting part. It is a figure which shows the 1 division body of the cut part divided into 5 parts. It is a front view of a saw blade. It is the front view and top view of a saw blade support part. It is the front view and top view of a cutting adjustment spring. It is a figure which shows a cutting | disconnection part when releasing one place of the connection places of the division body connected in the chain form. It is a figure explaining the insertion method to the cutting object position of a cable protection member. It is a figure explaining the positional relationship with the other pipe line at the time of cutting the pipe line with a dedicated cutting tool. It is a figure which shows a state when a wedge is driven between pipes. It is a figure which shows that the mutual space | interval of a pipe cannot be expanded in the abutment edge etc.

  Embodiments of the present invention will be described with reference to the drawings. The present invention is a pipe cutting jig used for cutting a predetermined position of a pipe at a place where the pipe interval is narrow. FIG. 1 is a front view of a pipe cutting jig when the pipe cutting jig according to the embodiment of the present invention is attached to the pipe to be cut, and FIG. It is an arrow view seen from the line (side view of the pipe cutting jig). FIG. 3 is an arrow view (cross-sectional view) seen from the line A-A ′ of FIG. 1.

  1 to 3 are divided rotary cutting jig 2 as a main body of the pipe cutting jig, stopper ring 3 attached to stabilize divided rotary cutting jig 2 on pipe 1, and divided rotation. A driving jig 4 for transmitting the rotational driving force to the cutting jig 2, a flexible shaft 5 for transmitting the rotational driving force at a position away from the pipe cutting jig, and a rotational driving force are generated to rotationally drive the divided rotary cutting jig 2. And a rotating handle 11 (driving device).

  The split rotary cutting jig 2 is disposed so as to surround the outer peripheral surface of the pipe 1, and includes a cutting unit 6 (cutting device) including a cutter 12 that cuts the pipe 1, a bearing 7, and a spur gear 8 (gear device). ) Are integrated, and are connected in a chain shape that is divided into five in the direction of the rotation axis so that the outer peripheral surface of the pipe line 1 can be surrounded.

  FIG. 4 is a side view of the cutting part 6. The cutting part 6 is comprised by the arc-shaped division body divided into 5 provided with the cutter 12, and each division body is connected with the chain shape. The cutting part 6 is disposed so as to surround the outer peripheral surface of the pipe line 1 so that the cutter 12 is in contact with the outer peripheral surface of the pipe line 1.

  As shown in FIG. 5, a cutter 12 is attached to one divided body of the cutting portion 6 divided into five, and a cutting adjustment spring 13 is attached to the cutter 12. The cutter 12 can adjust the cutting depth according to the thickness (thickness) of the pipe line 1 by the cutting adjustment spring 13, and can prevent damage to the housing cable due to excessive cutting. The cutter 12 includes a saw blade 14 for cutting the pipe line 1 and a saw blade support portion 15 for supporting the saw blade 14. FIG. 6 is a front view of the saw blade 14, and FIG. 7 is a front view and a plan view of the saw blade support portion 15.

  The cutting adjustment spring 13 makes it possible to keep the cutting strength of the cutter 12 constant. FIG. 8 is a front view and a plan view of the cutting adjustment spring 13. Moreover, FIG. 9 is a figure which shows a cutting | disconnection part when releasing one place of the connection places of the division body connected in the chain form.

  The bearing 7 transmits a rotational driving force to the cutting part 6 and has a structure in which a protrusion (not shown) is provided on the inner surface that contacts the outer periphery of the pipe 1 for the purpose of smooth rotation. The bearing 7 is divided into five arcs.

  The spur gear 8 receives the rotational driving force from the drive gear A9 and rotates integrally with the bearing 7 and the cutting portion 6, and contacts the outer periphery of the pipe line 1 for the purpose of smooth rotation. The structure is such that a metal (for example, bronze) 16 is disposed on the inner surface. The spur gear 8 is divided into five arcs.

  The stopper ring 3 is a ring-shaped part that is split in half. In the initial stage of cutting and cutting of the pipeline 1, the stopper ring 3 is used to suppress the blade tip of the cutter 12 and to make the cutting smoothly and efficiently. The jig 2 is attached so as to contact one end. If the cutting position is near the abutment, install it on the abutment side.

  The drive jig 4 is attached so as to be in contact with the other end of the divided rotary cutting jig 2. Similar to the stopper ring 3, it has a half ring shape, and is provided with a gear part for transmitting a rotational driving force from the outside to the spur gear 8 in addition to the purpose of suppressing shaking during rotation. As gear parts, a drive gear A9 composed of three spur gears for transmitting the rotational driving force to the spur gear 8, and an orthogonal two-axis bevel gear for transmitting the rotational driving force from the outside to the driving gear A9. A drive gear B10 is attached.

  The flexible shaft 5 can transmit a rotational driving force from an external driving device at a position away from the pipe cutting jig main body.

  In the above-described embodiment, the divided rotary cutting jig 2 is connected in the form of a chain divided into five parts, but is not limited to five parts, and may be any number of parts.

  Next, an operation when cutting the cable housing pipe using the pipe cutting jig according to the embodiment of the present invention will be described.

  First, when a cable is accommodated in the pipe line, prior to cutting, the cable protection member is inserted into the position to be cut to protect the cable. Although adjustment is possible so that the cutting edge of the cutter 12 does not cut beyond the thickness of the pipe line 1, protective measures for the cable are taken for the purpose of taking safety measures as much as possible. FIG. 10 is a diagram for explaining a method of inserting the cable protection member into the cutting target position. The cable protection member 21 is inserted into the pipe cutting position 22 after the pipe 1 is cut and removed at a standard position where the pipe interval can be cut by a dedicated cutting tool. Is done from. The cable protection member 21 has a cylindrical half-splitting structure that protects the cable 24, and is inserted by connecting the insertion rod 23 from the opening end. A scale indicating the insertion position is added to the insertion rod 23, and even if the pipe cutting position 22 is an arbitrary position at the opening end or the abutment 25, the pipe cutting position 22 is provided. The cable protection member 21 can be inserted into the cable.

  After the cable protection member 21 is inserted into the pipeline cutting position 22, as shown in FIG. 1, the stopper ring 3 is fixed to the pipeline 1 on the abutment 25 side, and the divided rotary cutting jig 2 is brought into contact with the stopper ring 3. Place. In other words, the cut portion 6, the bearing 7, and the spur gear 8 that are divided into five are connected and arranged so as to surround the outer peripheral surface of the pipe line 1. After the divided rotary cutting jig 2 is arranged, the drive jig 4 is attached so as to be in contact with the divided rotary cutting jig 2 and so that the tooth traces of the drive gear A9 and the spur gear 8 are engaged. One end of the flexible shaft 5 is joined to the shaft of the drive gear B10 that protrudes in a direction perpendicular to the pipe 1. Then, by manually rotating the rotary handle 11, the spur gear 8 of the split rotary cutting jig 2 is rotated by the rotational driving force of the gear of the driving jig 4, and the cutter 12 attached to the cutting part 6 is connected to the pipe line 1. The pipe 6 is cut by rotating the cutting portion 6 so as to be in contact with the outer peripheral surface of the pipe 1.

  As the cutting progresses, the cutting groove becomes deeper, but the cutting operation is continued while the cutting strength of the cutter 12 is kept constant by the cutting adjustment spring 13.

  In the above-described embodiment, the rotary handle 11 (drive device) manually rotates the gear and gear via the flexible shaft 5, but has a structure in which an attachment for an electric tool can be connected. Electric cutting work is also possible.

  As described above, since the pipe cutting jig according to the embodiment of the present invention uses a divided ring-shaped jig, cutting work is possible even in a place where the interval between the pipes is narrow. The jig of the present invention can be cut if the interval between the pipes is approximately 1.5 cm or more.

  Further, the pipe cutting jig according to the embodiment of the present invention can be cut by manual drive and electric drive, and the cutting speed can be adjusted according to the cutting state.

  Further, the pipe cutting jig according to the embodiment of the present invention is installed so as to surround the entire outer periphery of the pipe in a ring shape, and the cutting strength is also kept constant, so that the pipe is not adjusted after installation. The entire length of the road perimeter can be cut.

  Further, the blade (cutter) of a conventional cutting tube tool is generally circular or serrated, and is constituted by a large number of related mounting parts. The pipe cutting jig according to the embodiment of the present invention Is a machined commercially available sawtooth cutter, so that the configuration of the apparatus is simple and the blade can be easily replaced.

DESCRIPTION OF SYMBOLS 1 Pipe line 2 Division | segmentation rotary cutting jig 3 Stopper ring 4 Drive jig 5 Flexible shaft 6 Cutting part 7 Bearing 8 Spur gear 9 Drive gear A
10 Drive gear B
DESCRIPTION OF SYMBOLS 11 Rotation handle 12 Cutter 13 Cutting adjustment spring 14 Saw blade 15 Saw blade support part 16 Metal 20 Cutting pipe tool 21 Cable protection member 22 Pipe cutting position 23 Insertion rod 24 Cable 25 Abutment 26 Wedge

Claims (1)

A driving device for generating a rotational driving force;
A gear device that is arranged so as to surround the outer peripheral surface of the pipe and receives a rotational driving force from the driving device;
A pipe cutting jig that is disposed so as to surround the outer peripheral surface of the pipe, and rotates together with the gear device to cut the pipe.
The cutting device is composed of a plurality of divided bodies each provided with a cutter. The cutter is fixed at one end to the divided body, and the cutter is connected to the outer peripheral surface of the pipe line by connecting the divided bodies. And a cutting adjustment spring for adjusting a cutting depth according to the thickness of the pipe line is attached to the cutter at a place fixed to the divided body. Characteristic pipe cutting jig.

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