JPH0733508U - Plastic pipe punch - Google Patents

Abstract

(57) [Summary] [Objective] With a punching tool that is used to open a hole communicating with a joint to a plastic pipe after heat-sealing a saddle joint to the plastic pipe, it is easy and reliable to punch a plastic pipe. And it should be done quickly. [Constitution] Guide bushing 11 fitted in joint 32
Is fixed to the guide plate 12 in a stepwise manner, and the bracket 15 is slidably supported by the guide bolt 17 protruding from the guide plate 12. The bracket 15 is supported by crimping the pipe holder 18 from three sides to the joint 32 at an appropriate position on the guide bolt, and the support bar 23 is connected to the side of the bracket 15 via the stud bolt 22. The feed rod 25 slidably inserted into the support bar 23, the guide plate 12, and the guide bushing 11 is a screw shaft, a tapping blade is attached to the tip, a ratchet wrench 27 is attached to the upper end, and a nut 28 is screwed under the support bar. It is worn.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a punching tool used for forming a hole communicating with a joint on a plastic pipe after heat-sealing a saddle joint on the plastic pipe.

[0002]

[Prior art]

 After fusing the saddle joint to the plastic pipe, it is necessary to make a hole in the plastic pipe that communicates with the joint. FIG. 1 shows a punching tool that has been conventionally used to make a hole in such a plastic pipe. It has a stepped guide bushing 1 fitted to a joint end and a shaft slidably inserted into the guide bushing 1. 2, a tapping blade 3 which is detachably attached to the tip of the shaft 2, and a ratchet leech 4 which is attached to the rear end of the shaft 2. The saddle joint 5 is attached from the side of the plastic pipe 6. After making a fusion bond and then opening a hole in the plastic pipe 6 through the joint 5, insert the tapping blade 3 into the joint 5, then insert the guide bushing 1 into the joint end, and then push in the ratchet wrench 4 to tap it. The blade 3 is pressed against the plastic pipe 6, and in this state, the ratchet wrench 4 is reciprocally rotated by a predetermined amount.

[0003]

[Problems to be solved by the device]

 When drilling a hole in a plastic pipe with the conventional punching tool described above, the ratchet wrench must be rotated while the ratchet wrench is held down, and the cutting feed must be performed manually, which is troublesome. is there. It is an object of the present invention to provide a punching tool that can easily and reliably perform the above-described punching work on a plastic pipe.

[0004]

[Means for solving the problem and action]

 The punching tool of the present invention comprises a bracket that is detachably attached to a joint, a nut that is fixedly supported by the bracket, a feed rod that is screwed into the nut, and a tapping blade that is attached to the tip of the feed rod. And a lever attached to the rear end of the feed rod.The tapping blade is preferably detachably attached so that it can be replaced according to the size of the joint, and the lever is preferably attached. A ratchet wrench is used, and by rotating the ratchet wrench a certain amount, the feed rod is rotated in one direction.

According to the punching tool of the present invention, when the feed rod is rotated by operating the lever, the feed rod makes one rotation each time the feed rod makes one rotation (in the case of several threads, several pitches of the screw are used). The tapping blade is fed, and the drilling work is performed simply by turning the lever. When the tapping blade is moved back and forth only by rotating the lever, it is necessary to rotate the lever until the tapping blade hits the plastic pipe after setting the punching tool in the joint, which requires time and labor. .

In order to solve this problem, in a perforating tool of another invention, the above-mentioned feed rod of the perforating tool is slidably fitted into the bracket. The nut is threaded so that when the feed rod is turned in the direction in which cutting feed is performed with the rotation stopped, the nut retracts to the lever side. According to the punching tool of the present invention, the tapping blade can be pressed against the plastic pipe by grasping the lever or the feed rod or the nut and inserting the tapping blade at the tip of the feed rod into the joint and pushing the joint. The bracket is attached to the joint before and after this. Then turn the nut until it hits the bracket. When the feed rod is rotated by rotating the lever in this state, the nut initially tries to rotate with the feed rod, but immediately it is crimped to the bracket and rotation is stopped and the nut is fixed. Therefore, the feed rod is prevented from moving backward when the nut is pressed against the bracket, and is also prevented from moving forward when the tapping blade is pressed against the plastic tube. When the lever is rotated in this state, the feed rod is rotated, and the punching operation is performed.

In each of the punches described above, the bracket is usually attached to the joint by crimping a set screw or a holder screwed into the bracket to the joint, but a guide bushing supported by the bracket is provided. It is desirable to fit the joint so that the joint can be supported from inside and outside. As a result, the mounting state of the bracket is stable, and the drilling operation can be performed reliably and smoothly.

The above-mentioned bushing preferably has a step shape so that it can be applied to various joints having different sizes. And more preferably, it is supported by the bracket so as to be movable in the axial direction. After fitting the bushing into the joint at a size corresponding to the size of the joint, move the bracket and screw in the set screw, holder, etc. to fix the same position of the joint from the inside and outside, making the fixing state stronger. Because you can.

[0009]

【Example】

 The guide bushing 11 has a step shape so that the guide bushing 11 can be applied and fitted to joints of different sizes, and is attached to a guide plate 12 having a substantially triangular shape with round screws 13 as shown in FIG. The bracket 15 has a ring shape, and is fixed to the three corners (protrusions) of the guide plate 12 with lock nuts 16 and protrudes leftward from the guide plate 12 in FIG. It is slidably supported by bolts 17, and three knobs 19 with a pipe holder 18 at the tip and a grip 20 are screwed into the circumferential side surface at three positions in the circumferential direction at regular intervals and at an intermediate position between the guide bolts 17. A support bar 23 is integrally connected via a pair of stud bolts 22 protruding radially to the right in FIG.

The screw shaft-shaped feed rod 25 slidably penetrates the support bar 23, the guide plate 12 and the guide bushing 11, and a tapping blade 26 is detachably attached to the tip (left end in FIG. 2). A ratchet wrench 27 is attached to the rear end (right end in FIG. 2), and a nut 28 is screwed between the support bar 23 and the guide plate 12.

Next, an example of a work procedure for punching the plastic pipe 31 after heat-bonding the saddle joint 32 to the plastic pipe 31 using the punching tool of the present embodiment will be described. First, the tapping blade 26 is exchanged with one that fits the size of the joint 32, and the nut 28 is rotated to move it to the right side along the feed rod 25 as much as possible, then the support bar 23 is grasped and the bracket 15 Insert the more depending tapping blade 26 into the saddle joint 32 until it abuts the plastic tube 31. Next, the bracket 15 is inserted into the joint 32 from the outside, and the guide bushing 11 is inserted into the joint 32 from the inside. The guide bushing 11 is inserted up to a position where it can be inserted into the joint 32, and the fitting state is established at a position corresponding to the size of the joint. The guide bushing 11 insertion and the tapping blade insertion set described above may be reversed.

Next, the bracket 15 is lifted up to the joint end, the knob 19 and the grip 20 are rotated, and the pipe holder 18 is used to crimp and fix the joint 32 from three directions. In this state, the bracket 15 is fixedly supported by the guide bushing 11 inserted into the joint 32 at the joint end and the pipe holder 18 crimped from the outside. Then, the nut 28 is rotated and applied to the support bar 23.

Next, when the ratchet wrench 27 is rotated by a fixed amount, the feed rod 25 is rotated by a fixed amount in one direction. At the beginning of rotation, the nut 28 also rotates, but the nut 28 is crimped to the support bar 23 and immediately comes into a fixed state. After that, as the feed rod 25 rotates, the feed rod 25 is fed by a fixed amount, and the tapping blade 26 performs a punching operation.

[0014]

[Effect of device]

 The present invention is configured as described above and has the following effects. According to the piercing tool of claim 1, piercing work is performed on the plastic tube by simply rotating the rehearsal, and it is not necessary to rotatably operate while pushing the piercing tool, unlike the conventional piercing tool. Since it is good, the boring work is easy, and moreover, by turning the lever, the cutting feed can be performed reliably by a fixed amount, so that the boring can be carried out reliably.

According to the punching tool of the second aspect, by exchanging the tapping blade in accordance with the joint size, it becomes possible to perforate holes in accordance with the joint size. According to the perforating tool of claim 3, the cutting work can be performed only by rotating the ratchet wrench by a certain amount, and the ratchet wrench does not have to be fully rotated. Can be reduced.

According to the punching tool of the fourth aspect, by sliding the feed rod, the amount of advancement of the tapping blade can be increased, and the tapping blade can be pressed against the plastic pipe by a single operation. . According to the punching tool of the fifth aspect, the bracket can be firmly attached to the joint by fitting the guide bushing into the joint and supporting it from the inside.

If the guide bushing is stepped like the punch according to the sixth aspect, the guide bushing can be fitted to joints of various sizes. According to the punching tool of the seventh aspect, by sliding the bracket, the same portion of the joint can be supported from inside and outside by the guide bushing and the bracket, and the bracket can be more firmly fixed.

According to the eighth aspect of the present invention, the bracket can be firmly fixed to the joint by screwing a set screw or a holder.

[Brief description of drawings]

FIG. 1 is a view showing an example of use of a conventional punching tool.

FIG. 2 is a partial sectional front view of a punching tool according to the present invention.

FIG. 3 is a side view taken along line AA of FIG.

[Explanation of symbols]

11 ... Guide bushing 12 ... Guide plate 15 ... Bracket 17 ... Guide bolt 18 ... Pipe holder 19 ... Knob 20 ... Grip 22 ... Stud bolt 23 ... Support bar 25 ... Feed rod 26 ... Tapping blade 27 ... Ratchet wrench 31 ... Plastic tube 32 ... Saddle joint

Claims (8)

[Scope of utility model registration request] 1. A bracket, which is detachably attached to a joint, in a punching tool used to open a hole communicating with the joint to a plastic pipe after heat-sealing a saddle joint to the plastic pipe, and a fixed state to the bracket. A perforator including a nut supported by the feed rod, a feed rod screwed into the nut, a tapping blade attached to the tip of the feed rod, and a lever attached to the rear end of the feed rod. 2. The punching tool for a plastic pipe according to claim 1, wherein the tapping blade is detachably attached to the tip of the feed rod. 3. The tool for punching a plastic pipe according to claim 1, wherein a ratchet wrench is used as the lever. 4. The punching tool for a plastic pipe according to claim 1, wherein the feed rod is slidably inserted into the bracket. 5. The punching tool for a plastic pipe according to claim 1, wherein a guide bushing fitted to the joint is supported on the bracket. 6. The guide bushing has a step shape.
Perforator for the described plastic tube. 7. The punching tool for a plastic pipe according to claim 5, wherein the bracket is slidably supported by the guide bushing. 8. The punching tool for a plastic pipe according to claim 1, wherein the bracket is fixed to the joint by screwing a set screw or a holder.