JP3868320B2 - Tube cutting tool - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides the cutting tool in which a cutting tool main body capable of gripping a tube so as to be rotatable in the circumferential direction of the tube in a state of being positioned with respect to the longitudinal direction of the tube is provided with a blade for cutting the tube and gripping the tube The present invention relates to a tube cutting tool configured to be capable of cutting the tube along the circumferential direction of the tube by rotating the main body.
[0002]
[Prior art]
The above-mentioned pipe cutting tool can, for example, easily cut a pipe to be connected to a joint to the required length determined by so-called on-site adjustment based on the actual attachment position of the joint at the piping site. When cutting a flexible tube whose tube is covered with a covering to connect to a so-called one-touch joint, which can be easily connected by inserting the cut end of the flexible tube at a predetermined insertion depth. Has also been used.
[0003]
This one-touch joint B is described in, for example, Japanese Patent Application Laid-Open No. 2000-186793, and as shown in FIGS. 1 and 2, a cylindrical main body 2 having an annular sealing material 4 mounted on the inner back side, A retaining ring 3 having a distal end screwed into the inside of the cylindrical main body 2, and an inner peripheral tapered surface 5 whose diameter increases toward the distal end side of the retaining ring 3 is formed on the inner periphery of the distal end of the retaining ring 3, An annular retainer 6 biased in the direction of diameter reduction is mounted inside the cylindrical main body 2 between the sealing material 4 and the retaining ring 3, and the retainer 6 has an outer periphery that can slide on the inner peripheral tapered surface 5. The taper surface 7 and the protrusion 9 which can be engaged with the outer peripheral trough part 8 of the corrugated pipe A1 are provided.
[0004]
Then, the operator holds the cut end of the flexible tube A from which the covering body A2 has been removed in advance so that the protrusion 9 of the retainer 6 engages with the outer peripheral valley 8 of the corrugated tube A1, Inserted into the joint B through the inner side of the retaining ring 3 at an insertion depth D, and the retainer 6 is elastically pushed and expanded against the urging force at the outer peripheral ridge portion 10 of the corrugated pipe A1. The gap between the corrugated pipe A1 and the cylindrical main body 2 is sealed by the contact between the inner peripheral surface of the sealing material 4 and the outer peripheral ridge 10, and the protrusion 9 of the retainer 6 is connected to the outer periphery of the corrugated pipe A1. When the flexible tube A is engaged in the valley portion 8 and pulled in the pull-out direction, the outer peripheral taper surface 7 of the retainer 6 is pressed against the inner peripheral taper surface 5 of the retaining ring 3, and the protrusion 9 is 8 so that the retainer 6 is pressed in the direction of the diameter reduction Are also available connection while retaining the flexible tube A.
[0005]
Therefore, when the flexible tube A is connected to the one-touch joint B as described above, the cut end portion of the flexible tube A with the predetermined length L is removed in advance from the cutting position of the flexible tube A. Since the predetermined connection state cannot be ensured unless it is inserted into the joint B with the insertion depth D, the operator measures the length from the cutting position of the flexible tube A to the end surface A3 of the covering A2. It is necessary to check whether or not the covering body A2 of a predetermined length L has been removed, and the flexibility at a position away from the cutting position of the flexible tube A by a distance corresponding to the predetermined insertion depth D. It is necessary to write a mark M on the outer peripheral surface of the tube (outer peripheral surface of the cover) and check whether or not the mark M has been inserted.
[0006]
Therefore, in order to facilitate these confirmation operations, conventionally, as described in, for example, Japanese Patent Application Laid-Open No. 2001-108173, an engagement portion that is engaged with the distal end of the flexible tube is provided on one end side. An index for confirming whether or not a predetermined length of the covering has been removed from the cutting position of the flexible tube, and a distance corresponding to a predetermined insertion depth from the cutting position of the flexible tube. Using a template-like jig provided with a through-hole for writing a mark on the outer peripheral surface of the flexible tube at the selected position, it is related to the tip of the flexible tube from which the covering has been removed, that is, the tip of the corrugated tube. The contact plate engaged at the joint is applied to the outer peripheral surface of the flexible tube along the longitudinal direction, and a predetermined length is determined based on whether or not the position of the end surface of the covering coincides with the position of the index. Make sure that the outer cover is removed and pass through the through hole. Writing the mark to the flexible tube outer peripheral surface with a marker pen.
[0007]
In addition, like the one-touch joint B shown in FIGS. 1 and 2, an annular packing material 12 is mounted on the inner peripheral side of the retaining ring 3 so that water or the like does not enter the inside of the joint B. When the gap between the retaining ring 3 and the cover A2 is sealed with the packing material 12 with the cut end of the flexible tube A pushed into the joint B to the predetermined insertion depth D, the cover If A2 is removed too much, the gap between the retaining ring 3 and the covering A2 cannot be sealed. In this case, too, the covering for a predetermined length is removed using the index provided on the contact plate of the template-like jig. It is confirmed whether or not.
[0008]
[Problems to be solved by the invention]
For this reason, when writing a mark on the outer peripheral surface of the flexible tube by one person, hold the template-shaped jig against the outer peripheral surface of the flexible tube and hold it firmly with the flexible tube with one hand while using the remaining one hand. If the flexible tube is cut in a high place where the work posture is likely to be unstable or a narrow place where it is difficult to move as if both hands are desired, it is necessary to write the mark by grabbing the marker pen. In addition to the disadvantage that writing is difficult, there is also a drawback that it is difficult to confirm whether or not the covering for a predetermined length has been removed.
[0009]
The present invention has been made in view of the above circumstances, and it is an object of the present invention to make it possible to efficiently form necessary marks on a pipe outer peripheral surface on the spot even when the pipe is cut at a high place or a narrow place. To do.
[0010]
Another object is to provide a pipe having a predetermined length from the cutting position without confirming whether or not the pipe having the predetermined length is removed from the cutting position. It is to be able to cut reliably in a state where the covering of the minute portion is removed.
[0011]
[Means for Solving the Problems]
According to a first aspect of the present invention, a cutting tool body capable of gripping a tube so as to be rotatable in the circumferential direction of the tube while being positioned with respect to the longitudinal direction of the tube is provided with a blade for cutting the tube, A tube cutting tool configured to be able to cut the tube along the circumferential direction of the pipe by a turning operation of the cutting tool main body being gripped, and with the turning operation of the cutting tool body, A marker capable of forming a mark on the outer peripheral surface of the pipe which is separated from the cutting position of the pipe by a predetermined distance in the longitudinal direction of the pipe is provided on the indicator member fixed to the cutting tool body so that the position can be changed in the longitudinal direction of the pipe. A standard index is provided on the tool body, and a plurality of marking indices corresponding to each pipe diameter are provided on the index member, and the fixing position of the index member is changed, and one of the marking indices is defined as the standard By adjusting the index, the predetermined distance is adapted to the pipe diameter. And settable in that are configured to distance.
[0012]
[Action]
Along with the turning operation of the cutting tool main body for cutting the tube along the tube circumferential direction, the marker is moved along the tube outer circumferential surface in the tube circumferential direction, and a predetermined distance from the tube cutting position to the tube longitudinal direction. A mark can be formed on the outer peripheral surface of the pipe that is separated by a distance.
Further, when the position of the outer peripheral surface of the pipe where the mark is to be formed is different depending on the pipe diameter, the fixed position of the index member is changed, and one of the marking indices is adjusted to the reference index, thereby the predetermined distance. Is set to a distance corresponding to the diameter of the tube, and a mark can be formed on the outer peripheral surface of the tube at a position corresponding to the tube diameter.
[0013]
〔effect〕
Even when the pipe is cut at a high place or a narrow place, an operation of writing a mark using a template-like jig after the cutting is unnecessary, and a necessary mark can be efficiently formed on the pipe outer peripheral surface on the spot.
[0014]
In addition, it is possible to easily connect by cutting a flexible tube in which a tube body such as a corrugated tube is covered with a covering body at a high place or a narrow place and inserting the cut end with a predetermined insertion depth. Even when connecting to a so-called one-touch joint on the spot, a mark can be easily formed on the outer peripheral surface of the flexible tube at a position away from the cutting position of the flexible tube by a distance corresponding to a predetermined insertion depth.
In addition, even when the position of the outer peripheral surface of the tube where the mark is to be formed differs depending on the tube diameter, it can be formed on the outer peripheral surface of the tube according to the tube diameter with one tube cutting tool. When connecting a flexible tube with such a tube body covered with a cover to a one-touch joint, the outer surface of the flexible tube is located at a distance corresponding to a predetermined insertion depth according to the tube diameter. The mark can be easily formed.
[0015]
[0016]
[0017]
[0018]
According to a second aspect of the present invention, the tube is formed by covering a tube main body with a covering body, and a cutting index to be fitted to an end surface of the covering body when the tube is gripped by the cutting tool main body. , In that it is provided at a position away from the blade portion by a predetermined length in the longitudinal direction of the tube.
[0019]
[Action]
When cutting a pipe whose main body is covered with a covering with a predetermined length of the covering removed from the cutting position, the covering longer than the predetermined length is removed in advance. as cutting indicator is provided at a position separated by a predetermined length in the longitudinal direction of the tube is aligned to the end face of the covering body from gripping the tube at the cutting tool main body, if the cutting tool main body rotation operation The tube main body can be cut in a state where the covering for a predetermined length is removed from the cutting position.
[0020]
〔effect〕
For a pipe in which a pipe body such as a corrugated pipe is covered with a covering, a predetermined length from the cutting position is confirmed without particularly checking whether or not the predetermined length of the covering is removed from the cutting position. Can be cut reliably with the covering removed. [0021]
Characterizing feature of the invention described in claim 3 is the cutting indicators that are provided in the reference member.
[0022]
[Action]
When the predetermined length from the cutting position where the covering should be removed differs according to the tube diameter, so that the tube body can be cut with the covering for the predetermined length corresponding to the tube diameter removed, The fixing position of the indicator member can be changed in the longitudinal direction of the pipe.
[0023]
〔effect〕
Even when the predetermined length from the cutting position where the covering is to be removed differs depending on the tube diameter, it is possible to easily cope with one tube cutting tool.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the parts denoted by the same reference numerals as those in the conventional example indicate the same or corresponding parts.
[0025]
[First Embodiment]
1 and 2 show a state in which a cut end portion of a gas supply flexible tube A in which a metal corrugated tube A1 is covered with a resin coating A2 is inserted at a predetermined insertion depth D to prevent it from coming off. 3 shows a so-called one-touch joint B that is connected to the one-touch joint B and is used to cut the flexible tube when the flexible tube A is inserted and connected to the one-touch joint B at a predetermined insertion depth D. 1 shows a tube cutter C according to the invention.
[0026]
As shown in FIGS. 1 and 2, the one-touch joint B includes a cylindrical main body 2 provided with a male screw portion 1 for connection to a gas pipe and the like, and a tip portion screwed into the cylindrical main body 2. A retaining ring 3, an annular sealing material 4 is attached to the inner back side of the cylindrical body 2, and the inner periphery of the retaining ring 3 has an inner periphery that expands toward the distal end side of the retaining ring 3. An annular retainer 6 that forms a tapered surface 5 and is biased in the direction of diameter reduction is mounted inside the cylindrical main body 2 between the seal material 4 and the retaining ring 3, and the retainer 6 has an inner peripheral tapered surface. 5 is provided with an outer peripheral tapered surface 7 that can be slidably contacted with 5 and a protrusion 9 that can be engaged with an outer peripheral valley portion 8 of the corrugated pipe A1.
[0027]
Then, the covering body A2 is defined as a length obtained by adding a dimensional tolerance to the six ridges of the outer peripheral ridge portion 10 of the corrugated pipe A1 so that the protrusion 9 of the retainer 6 is engaged with the outer peripheral valley portion 8 of the corrugated pipe A1. A predetermined length L is removed from the cutting position, and a mark M is written on the outer peripheral surface of the flexible tube (outer peripheral surface of the cover) at a position corresponding to the predetermined insertion depth D from the cutting position. The operator holds the cut end portion of a certain flexible tube A and inserts it into the joint B through the inside of the retaining ring 3 so that the mark M moves to the position of the rear end surface 11 of the retaining ring 3. The retainer 6 is elastically pushed and expanded against the urging force at the outer peripheral ridge portion 10 of the corrugated pipe A1 so as to be inserted into the insertion depth D, and is inserted into the inner side of the cylindrical main body 2, Corrugated pipe A1 and cylindrical book by contact between the peripheral surface and the outer peripheral ridge 10 The retainer 6 moves together with the flexible tube A when the protruding portion 9 of the retainer 6 is engaged with the outer peripheral valley portion 8 of the corrugated tube A1 and the flexible tube A is pulled in the pull-out direction. The outer peripheral taper surface 7 of 6 is pressed against the inner peripheral taper surface 5 of the retaining ring 3 so that the retainer 6 is pressed in the diameter-reducing direction so that the protrusion 9 bites into the outer peripheral valley portion 8. Can be connected in a retaining state.
[0028]
Further, an annular packing material 12 is attached to the inner peripheral side of the retaining ring 3 so that water or the like does not enter the inside of the joint B, and the cut end portion of the flexible tube A is joined to the predetermined insertion depth D. In the state of being pushed into B, the gap between the retaining ring 3 and the covering A2 is sealed with the packing material 12.
[0029]
As shown in FIG. 3, the tube cutting tool C includes a cutting tool body 13 capable of gripping the flexible tube A and a disk-shaped rotary blade body (blade for cutting a tube) 14. The flexible tube A is configured to be cut along the circumferential direction of the tube by rotating the cutting tool main body 13 holding the wire.
[0030]
The cutting tool body 13 rotatably supports a pair of resin-made small-diameter rollers 15 and a resin-made large-diameter roller 16 provided so as to oppose these small-diameter rollers 15 in the tube radial direction. The end portion of the corrugated pipe A1 exposed by removing the body A2 is sandwiched between the pair of small-diameter rollers 15 and the large-diameter roller 16 from the pipe radial direction, and rotated in the pipe circumferential direction while being positioned with respect to the pipe longitudinal direction. It can be moved freely.
[0031]
The large-diameter roller 16 is rotatably supported by a movable member 18 provided so as to be movable in and out toward the small-diameter roller 15 by forward / reverse rotation operation of the operation member 17. The rotary blade body 14 is supported concentrically at an intermediate position, the corrugated tube A1 is gripped by the cutting tool body 13, and the rotary blade body 14 is pressed against the outer peripheral valley portion 8 of the corrugated tube A1 by operating the operation member 17. By rotating the cutting tool main body 13 in the state, the outer peripheral valley portion 8 of the corrugated pipe A1 can be cut along the pipe circumferential direction.
[0032]
Then, along with the turning operation of the cutting tool main body 13, a mark M is formed on the pipe outer peripheral surface (cover outer peripheral surface) separated from the cutting position of the corrugated pipe A1 by a predetermined distance (insertion depth) D in the pipe longitudinal direction. A possible marker 19 is provided on the cutting tool body 13.
[0033]
The marker 19, the cutter strip plate material 20 that is positioned changed freely fixed in the longitudinal direction of the corrugated tube A1 which is gripped by body 13, inserting a marker pen 2 1 such as felt pen impregnated with oily ink The pen support member 23 in which the insertion hole 22 is formed is fixed, and is inserted into the insertion hole 22 in accordance with the turning operation of the cutting tool main body 13 for cutting the corrugated pipe A1. With the marker pen 21, the mark M can be written on the pipe outer peripheral surface (cover outer peripheral surface) at a position separated from the cutting position of the corrugated pipe A1 by a distance corresponding to a predetermined insertion depth D.
[0034]
As shown in FIG. 4, the band plate member 20 is slidably mounted in the longitudinal direction along the guide plate 24 fixed to the cutting tool body 13, and is formed in a long hole along the longitudinal direction. A marking index Q (Q1 to Q4) that is fixed to the cutting tool main body 13 with a fixing screw 26 inserted into the guide plate 24 and that matches the reference index P provided on the guide plate 24 is provided along the long hole 25. The corrugated pipe A1 is provided for each of a plurality of types of nominal diameters.
[0035]
Then, the fixing screw 26 is loosened, and the strip plate material 20 is moved in the longitudinal direction so that the marking index Q (Q3) corresponding to the nominal diameter of the corrugated pipe A1 (nominal diameter 20A in FIG. 4) matches the reference index P. And is fixed to the cutting tool main body 13 with the fixing screw 26, so that the distance corresponding to the insertion depth D from the cutting position to the one-touch joint B is associated with the turning operation of the cutting tool main body 13. The mark M can be written on the outer peripheral surface of the pipe (the outer peripheral surface of the covering) at a distant position.
[0036]
[Second Embodiment]
FIG. 5 shows another embodiment of the tube cutting tool C. The marking index Q (Q1 to Q4) and the corrugated pipe A1 are connected by the cutting tool body 13 along the long hole 25 of the strip plate material 20 as the index member. Cutting indexes R (R1 to R4) to be matched with the end surface A3 of the covering A2 when gripping are provided in association with each of a plurality of types of nominal diameters of the corrugated pipe A1.
[0037]
The cutting index R (R1 to R4) is a lengthwise lengthening of the strip 20 so that the marking index Q (Q3) corresponding to the nominal diameter of the corrugated pipe A1 (nominal diameter 20A in FIG. 5) coincides with the reference index P. By sliding in the direction and fixing to the cutting tool main body 13 with the fixing screw 26, the cutting index R (R3) corresponding to the diameter of the corrugated pipe A1 is predetermined from the rotary blade body 14 in the longitudinal direction of the pipe. It is provided to indicate a position separated by a length L.
[0038]
Then, by holding the corrugated pipe A1 with the cutting tool body 13 so that the position of the cutting index R (R3) coincides with the position of the end surface A3 of the covering A2, the cutting tool body 13 is rotated. The one-touch joint from the cutting position while cutting the corrugated pipe A1 with the covering A2 of a predetermined length (the length obtained by adding a dimensional tolerance to the six peaks of the outer peripheral crest 10) from the cutting position. The mark M can be written on the outer peripheral surface of the pipe (the outer peripheral surface of the covering body) at a position separated by a distance corresponding to the insertion depth D into B.
Other configurations are the same as those of the first embodiment.
[0039]
[Other Embodiments]
1. The tube cutting tool according to the present invention has a tube longitudinal direction from the tube cutting position in order to display, for example, a range in which a male screw portion or the like is formed at the cutting end portion of a metal tube other than a flexible tube or a resin tube. Alternatively, a mark may be formed on the outer peripheral surface of the pipe separated by a predetermined distance. 2. The tube cutting tool according to the present invention may be one in which a scribing mark is formed on the outer peripheral surface of the tube with a scribing needle or the like.
3. In the tube cutting tool according to the present invention, a marker capable of forming a mark may be provided on the outer peripheral surface of a tube body formed by covering the tube body with a covering.
4). The tube cutting tool according to the present invention may be one that can be used for only a single nominal diameter tube.
[Brief description of the drawings]
1 is a longitudinal sectional view of a one-touch joint. FIG. 2 is a longitudinal sectional view showing a state where a flexible tube is connected to the one-touch joint. FIG. 3 is a perspective view of a pipe cutting tool. Explanatory drawing [FIG. 5] Explanatory drawing of the usage method of the tube cutting tool of 2nd Embodiment [Explanation of numerals]
13 Cutting Tool Body 14 Blade 19 Marker
20 Index member A Pipe A1 Pipe body A2 Cover A3 End face D Predetermined distance M Mark
P Standard index
Q Marking index R Cutting index

Claims (3)

A cutting tool main body capable of gripping a tube so as to be rotatable in the circumferential direction of the tube in a state of being positioned with respect to the longitudinal direction of the tube is provided with a cutting portion for cutting the tube
A tube cutting tool configured to be able to cut the tube along the circumferential direction of the tube by rotating the cutting tool main body holding the tube,
As the cutting tool main body is turned, a marker capable of forming a mark on the outer peripheral surface of the pipe separated from the cutting position of the pipe by a predetermined distance in the longitudinal direction of the pipe is freely changeable in the longitudinal direction of the pipe. Provided on the indicator member fixed to the body,
While providing a reference index on the cutting tool body, providing a plurality of marking indices according to the diameter of the tube on the index member,
A pipe cutting tool configured such that the predetermined distance can be set to a distance according to the diameter of the pipe by changing the fixing position of the index member and matching one of the marking indices with the reference index . The tube is configured by covering the tube body with a covering body,
Wherein the cutting indicator to align the end face of the cladding, and Aru claim 1 Symbol mounting tube cutting provided at a position separated by a predetermined length in the longitudinal direction of the tube from the cutting unit when gripping the tube at the cutting tool main body Ingredients. The tube cutting tool according to claim 2 , wherein the index for cutting is provided on the index member.

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