JP2002264044A - Marking tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a marking tool constituted to enable easy marking to the tip part of a pipe even in the state of wearing gloves for work. SOLUTION: This marking tool 1 is formed of brass or bronze into almost cylindrical shape and provided with a first pipe insertion hole 2a and a second pipe insertion hole 2b in the internal opposed positions. A partition plate 4 is provided at the center inside the marking tool 1, and a first contact confirmation aperture 5a and a second contact confirmation aperture 5b are provided through at the center on the outside. The partition plate 4 facing the first pipe insertion hole 2a is provided with a first abutting part 4a, and the partition plate 4 facing the second pipe insertion hole 2b is provided with a second abutting part 4b. The open end parts of the respective pipe insertion holes 2a, 2b are provided with grip parts 6a, 6b. Display parts 7a, 7b, 8 are provided on the outer peripheral surface of the marking tool 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a marking jig used for connecting pipes constituting water pipes, hot water pipes, floor heating, road heating, etc. to joints and the like. More specifically, in the work, for the purpose of preventing poor connection of the pipe,
The present invention relates to a marking jig configured to accurately measure and mark a position separated by a predetermined length from a tip of a pipe so that the length of a pipe to be inserted into a joint can be easily grasped. Things.

[0002]

2. Description of the Related Art Conventionally, as a marking jig used for this kind of joint connection operation, for example, Japanese Patent Laid-Open
BACKGROUND ART There is known a joint including a joint body, a coring, a restricting means, and a seal member disclosed in Japanese Patent No. 170975/170. The joint body has a tubular shape, is connected to the pipe, and has a pipe connection port for connecting a resin pipe. The core ring is constituted by a tubular portion having a tubular shape and an annular flange portion formed at one end of the tubular portion, and is configured to be fitted inside the end of the pipe from the tubular portion side. ing. The seal member is configured so that the core ring when not attached to the pipe can be accommodated in the pipe connection port, and is bonded to the joint body so as to prevent the core ring from falling off from the pipe connection port in this state. ). Further, the seal member is configured to be able to be attached to the outer peripheral surface of the pipe.

[0003] In addition, the pipe is inserted to the inside of the pipe connection port with the tubular part of the core ring fitted into the end of the pipe and the inner end face of the flange engaged with the end face of the pipe. Accordingly, the outer end surface of the flange of the coring is configured to abut on the abutting surface provided in the inner part of the pipe connection opening. Further, at this time, the end surface of the tubular portion of the coring and the end surface of the joint body on the side where the pipe protrudes are located at the same position.

[0004] Then, the seal member of the joint is attached to the outer peripheral surface of the pipe so that the position of the end face of the cylindrical portion of the coring fitted into the end of the pipe can be visually recognized, thereby forming the pipe. Whether or not the plug has been inserted to an appropriate position in the connection port can be easily confirmed using the seal member as a mark. That is, when the outer end surface of the flange portion of the core ring abuts against the abutment surface of the inner portion of the pipe connection opening, the end surface of the tubular portion of the core ring and the end surface of the joint body on the side where the pipe protrudes are at the same position. The position can be easily visually recognized from the outside by a seal member attached to the outer peripheral surface of the pipe.

[0005]

However, in the joint connection work, the worker usually works while wearing work gloves to perform the work safely. For this reason, it is very difficult to stick the seal member at an appropriate position on the outer peripheral surface of the pipe with a hand that is difficult to perform fine work while wearing work gloves, and the work efficiency was extremely poor. .

The present invention has been made by paying attention to the problems existing in the prior art as described above. An object of the present invention is to provide a marking jig configured to be able to easily mark the tip of a pipe even when working gloves are worn.

[0007]

According to a first aspect of the present invention, there is provided a marking jig for marking a position at a predetermined distance from a tip of a pipe. A jig for the pipe, a pipe insertion hole for removably inserting a tip of the pipe, and a jig provided at an inner portion of the pipe insertion hole, the tip of the pipe being configured to abut. With the contact part,
The contact portion is provided at a position separated by a predetermined length from the opening end of the pipe insertion hole.

According to a second aspect of the present invention, there is provided a marking jig according to the first aspect of the present invention, wherein a contact confirmation window is provided on a side portion of the pipe insertion hole, and a tip end of the pipe is inserted into the pipe insertion hole. When inserted into the pipe, it can be confirmed that the tip of the pipe is in contact with the contact portion.

According to a third aspect of the present invention, there is provided a marking jig according to the first or second aspect, wherein a plurality of pipe insertion holes having different inner diameters are provided.

According to a fourth aspect of the present invention, there is provided the marking jig according to any one of the first to third aspects, wherein a grip portion is provided on an outer surface of an opening end of the pipe insertion hole. It is characterized by the following.

According to a fifth aspect of the present invention, in the marking jig according to the first aspect of the present invention, a display portion is provided on an outer surface of the pipe insertion hole to display a method of use. It is characterized by having such a configuration.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIGS. 1 and 2, the marking jig 1 is formed in a substantially cylindrical shape from brass or bronze, and has a first pipe insertion hole 2a and a second pipe insertion hole 2b therein. The first pipe insertion hole 2 a is provided at one end of the marking jig 1. The first pipe insertion hole 2a has an inner diameter of 14 mm,
A first pipe 3 having a depth of 31 mm and a cylindrical shape made of synthetic resin (polyolefin, for example, crosslinked polyethylene or polybutene) and having an outer diameter of 14 mm or less;
a is configured to be removably insertable. The second pipe insertion hole 2b is provided at the other end of the marking jig 1 facing the first pipe insertion hole 2a. The inside diameter of the second pipe insertion hole 2b is 1
The second pipe 3b, which is formed to have a diameter of 8 mm and has an outer diameter of 14 to 18 mm and formed in a cylindrical shape by the same synthetic resin, can be inserted and removed.

In the center of the inside of the marking jig 1,
A partition plate 4 for separating the first pipe insertion hole 2a and the second pipe insertion hole 2b is provided. One side surface of the partition plate 4 facing the first pipe insertion hole 2a is a first contact portion 4a to which the tip of the first pipe 3a contacts.
A second contact portion 4b to which the tip of the second pipe 3b contacts the peripheral portion of the partition plate 4 facing the second pipe insertion hole 2b.
Are formed in an annular shape. Further, the second contact portion 4b
At the center of the partition plate 4 surrounded by a circle, a lightening portion 4c for preventing sinking when the marking jig 1 is formed is recessed. As shown in FIG. 2B, a distance d between the first contact portion 4a and the opening end of the first pipe insertion hole 2a.
(= 31 mm) is configured to be the same as the distance d between the second contact portion 4b and the opening end of the second pipe insertion hole 2b.

A pair of upper and lower first abutments formed in a rectangular hole shape by vertically penetrating an outer peripheral wall 1a constituting the marking jig 1 at the innermost portion of the first pipe insertion hole 2a. A confirmation window 5a is provided. As shown in FIGS. 2B and 2C, the first contact confirmation window 5a has one side edge in the longitudinal direction provided along the first contact portion 4a, and also has the longitudinal direction. Are provided along two virtual lines (indicated by two-dot chain lines) extending radially at an angle of 90 ° from the center point O of the first pipe insertion hole 2a. Further, a pair of upper and lower second abutments formed in a rectangular hole shape by vertically penetrating an outer peripheral wall 1a constituting the marking jig 1 at the innermost portion of the second pipe insertion hole 2b. A window 5b is provided. These second contact confirmation windows 5
b, like the first contact confirmation window 5a, one side edge in the longitudinal direction is provided along the second contact portion 4b, and both ends in the longitudinal direction are the second pipe insertion holes. It is provided along two imaginary lines extending radially at an angle of 90 ° from the center point of 2b.

The outer peripheral surface of the opening end of the first pipe insertion hole 2a has a first grip portion projecting outwardly from the outer peripheral surface of the outer peripheral wall 1a constituting the base end side of the first pipe insertion hole 2a. 6a
Is provided. The outer peripheral surface (front surface) of the first gripping portion 6a is formed by a rough surface, and when the first pipe 3a is inserted into and removed from the first pipe insertion hole 2a, the marking jig 1 is easily and reliably inserted. Acts as a non-slip for gripping. Similarly, the outer peripheral surface of the opening end of the second pipe insertion hole 2b projects outward from the outer peripheral surface of the outer peripheral wall 1a constituting the base end side of the second pipe insertion hole 2b. Is provided with a second gripping portion 6b constituted by a rough surface, so that the marking jig 1 can be gripped easily and reliably.

On the other hand, as shown in FIG. 1 (a), a first inner diameter display portion 7a (in the figure) for displaying the inner diameter of the first pipe insertion hole 2a is provided on the outer peripheral surface of the central portion of the first pipe insertion hole 2a. Is displayed as "10A"). In addition, a second inner diameter display section 7 for displaying the inner diameter of the second pipe insertion hole 2b is provided on the outer peripheral surface of the center of the second pipe insertion hole 2b.
b (indicated as “13A” in the figure). The maximum outer diameter of the pipes 3a, 3b that can be inserted into each of the pipe insertion holes 2a, 2b can be easily visually recognized by visually checking the inner diameter display portions 7a, 7b.

A marking position display section 8 (indicated as "marking position" in the figure) is provided on the upper outer peripheral surface of each of the grip sections 6a and 6b. These marking position display portions 8 are used to mark the outer peripheral surfaces of the inserted pipes 3a, 3b with a marker pen or the like when the respective pipes 3a, 3b are inserted to the deepest portions in the pipe insertion holes 2a, 2b. The marking position is displayed. Also,
As shown in FIG. 2 (a), on the outer peripheral surface of the lower part of the marking jig 1, a use explanation display section 9 (in order from the left in the figure, " Type A "," Mark before insertion of in-core "," Confirmation window ", and" Double lock joint ") are provided.

The operation of the marking jig 1 will be described below. When marking on the first pipe 3a using the marking jig 1 configured as described above,
First, while holding the outer peripheral surface of the first holding portion 6a with one hand and holding the tip of the first pipe 3a with the other hand, insert the tip of the first pipe 3a into the first pipe insertion hole 2a. To the innermost part of. At this time, as shown in FIG. 1, the tip of the first pipe 3a is in contact with the first contact portion 4a at the innermost part of the first pipe insertion hole 2a. Subsequently, the first contact confirmation window 5a is visually observed from outside the jig 1 for marking, and
Check that the tip of the pipe 3a is in contact with the first contact portion 4a. Finally, the tip of the first pipe 3a and the first
By moving the pen tip of a marker pen (not shown) along the opening end of the first pipe insertion hole 2a while maintaining the contact state with the contact portion 4a, the tip end of the first pipe 3a is moved to a predetermined position on the outer peripheral surface. The marking line 10 is drawn.

Similarly, when marking on the second pipe 3b, the tip of the second pipe 3b is inserted to the innermost part in the second pipe insertion hole 2b, and then, from outside the marking jig 1. The second contact confirmation window 5b is visually observed to confirm that the tip of the second pipe 3b is in contact with the second contact portion 4b. Finally, the tip of the marker pen (not shown) is moved along the opening end of the second pipe insertion hole 2b while maintaining the contact state between the tip of the second pipe 3b and the second contact portion 4b. A marking line 10 is drawn at a predetermined position on the outer peripheral surface of the distal end of the second pipe 3b.

Next, a case where the first pipe 3a on which the marking line 10 is displayed is connected to a water supply pipe via a one-touch joint 11 will be described. As shown in FIGS. 3 to 5, a joint body 12 constituting the one-touch joint 11
Is formed in a substantially cylindrical shape from brass or bronze. A first male screw portion 13 is provided on the outer periphery of a base end portion of the joint main body 12, and is configured to be screwable with a pipe 14 of a water supply pipe. On the other hand, a nut 1
5 are provided. This nut portion 15 is used for the joint body 1.
It is configured such that a tool such as a wrench can be engaged when screwing the 2 and the pipe 14 of the water supply pipe and releasing the screw. And by this structure, the joint main body 12 can be easily rotated with respect to the pipe body 14 of a water supply pipe.

A first female thread 16 is provided on the inner periphery of the distal end of the joint body 12. An abutment surface 17 that is disposed to be orthogonal to the axis of the joint body 12 is formed in an annular shape in an inner back portion of the joint body 12. An annular inclined surface 18 is provided on the inner peripheral surface of the joint body 12 connected to the contact surface 17. The inclined surface 18 is provided at an intermediate position between the contact surface 17 and the first female screw portion 16 and is formed in a tapered shape whose inner diameter increases toward the distal end. A receiving surface 19 is provided on the outer peripheral edge of the inclined surface 18.
Is provided. The receiving surface 19 is formed in the joint body 12 in an annular shape so as to be orthogonal to the axis of the joint body 12. A first inner peripheral groove 20 is annularly recessed on the inner periphery of the joint body 12 between the inclined surface 18 and the contact surface 17. A first seal ring 21 having an elliptical cross section made of rubber or silicone is fitted inside the first inner peripheral groove 20.

An introduction passage 22 is provided inside the joint body 12 from the base end of the joint body 12 to the contact surface 17, and when the joint body 12 is screwed into the pipe 14 of the water supply pipe, it is used as a transport fluid. Through the liquid (tap water). Introductory path 2 on nut 15 side
An annular inclined wall 23 is provided on the inner peripheral surface of the inner peripheral surface 2, and is formed in a tapered shape in which the inner diameter decreases toward the distal end side. A reduced-diameter portion 24 formed in an annular shape is provided on the inner peripheral edge on the tip side of the inclined wall 23. The inner diameter of the reduced diameter portion 24 is formed to be smaller than the inner diameter of the introduction path 22.

As shown in FIG. 3, the first lock ring 25a and the second lock ring 25b as the restricting means constituting the one-touch joint 11 are formed by forming stainless steel into a substantially annular shape by a press forming method. ing. Each of the lock rings 25a and 25b includes a base ring 26 formed in an annular shape, and a plurality of restriction pieces 27 protruding inward from the inner peripheral edge of the base ring 26 by the same length.
It is more configuration and. These restricting pieces 27 are bent and formed to extend at an angle of 45 ° with respect to the base ring 26, and facilitate insertion of the first pipe 3a from the base end side to the distal end side of the restricting piece 27, and are inserted. The first pipe 3a can be prevented from coming off.

In the center between all adjacent restriction pieces 27,
A notch 28 and a slit 29 are provided. The notch 28 is formed in an arc shape from the side of the restricting piece 27 to the side of the base ring 26 so as to correspond to the depth at which the restricting piece 27 bites into the outer peripheral surface of the first pipe 3a. The slit 29 is formed by forming a V-shaped notch of a predetermined depth from the center of the bottom of each notch 28 to the base ring 26, and the first pipe 3a is inserted into the lock rings 25a, 25b. When the regulation piece 2
A predetermined amount of deformation of 7 can be allowed. Further, a spacer 30 constituting the one-touch joint 11 formed in an annular shape of stainless steel is interposed between the pair of lock rings 25a and 25b.

As shown in FIG. 5, a pair of lock rings 2
5a, 25b, the first lock ring 25a is positioned such that its base ring 26 is engaged on the receiving surface 19 of the joint body 12, and the restricting piece 27 has a slight gap between it and the inclined surface 18. ing. The spacer 30 is provided in the first
The lock ring 25a is engaged with the receiving surface 19 via the base ring 26. Further, the second lock ring 25b has a
Base ring 26 of lock ring 25a and spacer 3
0 on the receiving surface 19.

As shown in FIGS. 3 to 5, the pressing body 31 constituting the one-touch joint 11 is formed in a substantially cylindrical shape from brass or bronze. The pressing body 31 has a cylindrical portion 32
And a grip portion 33 formed slightly smaller than the outer diameter of the nut portion 15 of the joint body 12, and a through hole 34 passing through the grip portion 33 and the cylindrical portion 32 is provided at the center thereof. . A second external thread portion 35 is provided on the outer peripheral surface of the cylindrical portion 32, and is configured to be screwed with the first internal thread portion 16 of the joint body 12. The grip 33
A pair of locking portions 36 are cut out at opposing positions on the outer peripheral surface of the front end of the pair. These locking portions 36 are provided on the pressing body 31.
When a screw is screwed into and released from the joint body 12, a tool such as a spanner can be engaged. And with this configuration, the joint body 12
, The pressing body 31 can be easily rotated.

An outer peripheral groove 37 is annularly recessed at the center of the outer peripheral surface of the pressing body 31. A second seal ring 38 formed in an annular shape with rubber or silicone is fitted inside the outer peripheral groove 37. When the pressing body 31 is screwed into the joint body 12, the second seal ring 38 seals the gap between the pressing body 31 and the joint body 12. Also, the through hole 34 of the pressing body 31
A second inner peripheral groove 39 is annularly recessed at the central portion of the inner peripheral surface of the inner peripheral surface. A third seal ring 40 formed in an annular shape with rubber or silicone is fitted inside the second inner peripheral groove 39.

Then, when assembling the one-touch joint 11, first, as shown in FIG. In this order, the joint body 1
2 into the first female screw portion 16. Next, a tool such as a spanner is engaged with the locking portion 36 of the pressing body 31, and the pressing body 31 is pressed.
Is screwed into the joint body 12 to assemble the one-touch joint 11, and the pipe connection port 41 is formed from the through hole 34 of the pressing body 31 to the contact surface 17 of the joint body 12. At this time, both lock rings 2
5a, 25b are positioned and fixed immovably in the axial and circumferential directions by the end of the cylindrical portion 32 of the pressing body 31 with the spacer 30 interposed therebetween.
1 is provided with a regulating means. Further, the gap between the joint body 12 and the pressing body 31 is sealed by the second seal ring 38.

As shown in FIG. 3, a core ring 4 attached to the distal end of the first pipe 3a and used to assist the connection of the first pipe 3a into the one-touch joint 11 is provided.
2 is formed in a substantially cylindrical shape by brass or bronze.
The core ring 42 includes a cylindrical portion 43 and an annular flange portion 44 that extends outward at one end of the cylindrical portion 43 so as to be orthogonal to the cylindrical portion 43. Further, from the inner end surface 44a of the flange portion 44 to the outer end surface 44b,
The annular portion 45 is formed in an annular shape. This annular part 45
Is provided with an inclined surface 46 which is formed in a tapered shape narrowing toward the outer end side.

As shown in FIG. 4, the cylindrical portion 43 is
The first pipe 3a is fitted into the pipe 3a to prevent the first pipe 3a from being deformed inward due to heat or the like. Also,
An inclined portion 47 formed in a tapered shape narrowing toward the distal end is provided at the distal end of the cylindrical portion 43. This oblique part 4
Numeral 7 is configured to be able to cope with variations in the inner diameter of the first pipe 3a and to allow the cylindrical portion 43 to be easily inserted into the first pipe 3a. Further, when the cylindrical portion 43 is inserted to the depth of the first pipe 3a, the inner end surface 44a of the flange 44
a.

The length of the core ring 42 in the longitudinal direction is determined by the distance between the contact surface 17 of the one-touch joint 11 and the pressing body 31.
, That is, the same length as the length of the pipe connection port 41 in the longitudinal direction. Further, the length d in the longitudinal direction of the cylindrical portion 43 excluding the flange portion 44 is the length (depth) d (= 3) of the two pipe insertion holes 2a and 2b shown in FIG.
1 mm). Therefore,
The marking line 10 displayed on the outer peripheral surface of the distal end portion of the first pipe 3a is configured to be located along the distal end edge of the cylindrical portion 43. Furthermore, this marking line 10
When the distal end portion of the first pipe 3a to which the coring ring 42 is attached is inserted up to the deepest portion of the pipe connection port 41 of the one-touch joint 11, the first pipe 3a is configured to be located along the open end of the pipe connection port 41. I have.

The one-touch joint 1 constructed as described above
When the first pipe 3a on which the marking line 10 is displayed is connected to a water pipe using the first and the coring 42, first, the first male screw portion of the joint main body 12 constituting the assembled one-touch joint 11 is used. 13 is screwed into the pipe 14 of the water supply pipe. At this time, it is preferable to use a tool such as a wrench to screw the nut portion 15 into the distal end portion of the pipe 14 of the water supply pipe, and tighten and fix the one-touch joint 11 to the pipe 14.

On the other hand, as shown in FIG. 4, the tubular portion 43 of the core ring 42 is inserted into the inner peripheral surface of the distal end portion of the first pipe 3a cut vertically, and the distal end surface of the first pipe 3a is The inner end surface 44a of the flange portion 44 of 42 is securely brought into contact. At this time, the marking line 10 of the first pipe 3a is located along the leading edge of the cylindrical portion 43, and the first pipe 3a
The tip position of the cylindrical portion 43 can be easily grasped from the outside of FIG.

Next, as shown in FIG.
Is inserted into the pipe connection port 41 to the innermost part of the first pipe 3a into which the is fitted. Finally, the first pipe 3
By confirming whether or not the marking line 10 displayed on the outer peripheral surface of the a is at the same position as the distal end surface of the one-touch joint 11, the outer end surface 44b of the flange portion 44 of the core ring 42 is confirmed.
The one-touch joint 1 determines whether or not the
1 can be confirmed from outside.

The gap between the first pipe 3a connected to the one-touch joint 11 and the pressing body 31 is sealed by a third seal ring 40 provided on the inner peripheral surface of the pressing body 31. The gap with the joint body 12 is sealed by the first seal ring 21 provided on the inner peripheral surface of the joint body 12. Therefore, water leakage at the connection between the first pipe 3a and the one-touch joint 11 is reliably prevented. Particularly, by performing a very simple check operation as to whether or not the marking line 10 of the first pipe 3a is located at the same position as the tip end surface of the one-touch joint 11, a reliable sealing effect by the two seal rings 21 and 40 is exhibited. This helps to prevent water leakage due to poor connection. Further, the distal end of the first pipe 3a is connected to a pair of lock rings 2.
When inserted into 5a, 25b, the restriction pieces 27 located at the two stages are slightly expanded outward, respectively, and the tips are engaged with the outer peripheral surface of the first pipe 3a in two stages. As a result, the first pipe 3a is double-locked in the one-touch joint 11, and is reliably prevented from falling out of the pipe connection port 41.

The effects achieved by the above embodiment will be described below. The marking jig 1 of the embodiment includes pipe insertion holes 2a and 2b for inserting the distal ends of the pipes 3a and 3b, and the pipe insertion holes 2a and 2b.
And abutment portions 4a and 4b to which the ends of the pipes 3a and 3b abut. Further, the contact portions 4a and 4b are provided at positions separated by a predetermined length d from the open ends of the pipe insertion holes 2a and 2b. For this reason, the marking jig 1 is provided with the pipe insertion hole 2.
By inserting the tips of the pipes 3a, 3b into the pipes 3a, 3b, the position at a predetermined distance d from the tips of the pipes 3a, 3b can be measured very easily, and a marking line 10 is drawn at the position to perform marking. can do.

Then, the marking line 10 is connected to the pipe 3
When the pipes 3a, 3b are inserted to the innermost part in the pipe connection port 41 of the one-touch joint 11, the contact surfaces 17a, 3b are displayed so as to be visible on the outer peripheral surfaces of the distal ends of the a, 3b.
The contact state between the outer ring 44 and the outer end surface 44b of the flange 44 of the core ring 42 can be easily confirmed from the outside. Accordingly, the connection between the pipes 3a and 3b and the one-touch joint 11 can be performed more reliably, and the workability when connecting the two can be easily improved.

In particular, in the seal member of the conventional joint,
When the sticking operation is performed with a hand that is difficult to perform fine work with the working gloves on, it is extremely difficult to stick the seal member at an appropriate position on the outer peripheral surface of the pipe. For this reason, it is necessary to remove the gloves every time this bonding operation is performed, or to perform the bonding operation slowly and carefully while taking a long time. In addition, there is a possibility that the sealing member once adhered to the outer peripheral surface of the pipe may easily come off by touching the working glove. On the other hand, the marking jig 1 of the present embodiment has extremely good work efficiency in the marking work as described above, and has the one-touch joint 11 and the pipes 3a,
The efficiency of the connection work with 3b can be easily improved.

The marking jig 1 is provided with contact confirmation windows 5a and 5b on the side of the pipe insertion holes 2a and 2b.
The configuration is such that it can be visually confirmed that the tips of the pipes 3a, 3b are in contact with the contact portions 4a, 4b. For this reason, the marking line 10 can be easily and reliably marked at an appropriate position on the outer peripheral surface of the distal end portion of each of the pipes 3a and 3b.

The marking jig 1 includes a first pipe insertion hole 2a and a second pipe insertion hole 2b having an inner diameter different from that of the first pipe insertion hole 2a. For this reason, a single marking jig 1 can mark various types of pipes 3a and 3b having different outer diameters, which is very convenient and economical for carrying around.

The provision of the grips 6a, 6b on the outer peripheral surface of the open ends of the pipe insertion holes 2a, 2b facilitates the insertion and removal of the pipes 3a, 3b into the pipe insertion holes 2a, 2b. Can be. Further, since the outer peripheral surfaces of the grip portions 6a and 6b are formed of rough surfaces, a non-slip effect when gripping the marking jig 1 can be exerted, so that the marking operation can be performed more easily. It becomes possible.

Display portions 7a, 7b, 8, 9 are provided on the outer peripheral surfaces of the pipe insertion holes 2a, 2b so as to indicate how to use the marking jig 1, so that even an unskilled worker can perform marking. The jig 1 can be easily used.

The present embodiment can be embodied with the following modifications. For example, the inside diameter of the first pipe insertion hole 2a may be 23 mm, and the inside diameter of the second pipe insertion hole 2b may be 28 mm. At this time, the first inner diameter display portion 7a indicates “16A”,
The second inner diameter display section 7b displays "20A".

For example, a core of a ball-point pen, a core of a pencil, a chalk, or the like is provided on the inner peripheral surface of the open end of each of the pipe insertion holes 2a and 2b or the inner peripheral surface of the open end so as to slightly protrude. . In such a configuration, the pipe insertion hole 2
By rotating the pipes 3a, 3b inserted into the innermost portions of the pipes a, 2b in the pipe insertion holes 2a, 2b, the marking line 10 can be drawn very easily at a predetermined position on the outer peripheral surface.

At least one display unit selected from the first inner diameter display unit 7a, the second inner diameter display unit 7b, the marking position display unit 8, and the use explanation display unit 9 may be omitted. -At least one kind of gripper selected from the first gripper 6a and the second gripper 6b may be omitted.

The first jig provided on the marking jig 1
The pipe insertion hole 2a or the second pipe insertion hole 2b may be omitted. -Provide three or four or more pipe insertion holes with different inner diameters in one marking jig 1.

At least one kind of contact confirmation window selected from the first contact confirmation window 5a and the second contact confirmation window 5b may be omitted. The contact confirmation windows 5a and 5b are omitted, and the contact portions 4a and 4b are omitted.
The ball-point pen core, pencil core, chalk, etc. should be slightly projected. With this configuration,
By rotating the pipes 3a, 3b inserted to the innermost portions in the pipe insertion holes 2a, 2b in the pipe insertion holes 2a, 2b, it is possible to mark the leading edges of the pipes 3a, 3b. By confirming the markings on the leading edges of the pipes 3a and 3b,
It can be easily confirmed whether or not the tips of the a and 3b have come into contact with the contact portions 4a and 4b.

Further, a technical idea which can be grasped from the embodiment will be described below. (1) Inserting the tip of the pipe into the pipe insertion hole, and marking the outer periphery of the tip of the pipe along the opening end of the pipe insertion hole with the tip of the pipe in contact with the contact portion. The marking jig according to claim 1, wherein the jig is configured to mark a line. With such a configuration, the marking line can be easily marked on the tip of the pipe even when the work gloves are worn.

(2) The marking jig according to any one of (1) to (5) and (1), wherein the pipe is a resin pipe connected to a one-touch joint. With such a configuration, the operation of connecting the resin pipe to the one-touch joint can be easily performed.

(3) The marking jig according to (2), wherein the predetermined length is formed to be substantially the same as the depth of the pipe connection port of the one-touch joint. With this configuration, when connecting the pipe to the one-touch joint, the quality of the connection can be easily checked from the outside.

(4) While being formed in a substantially cylindrical shape,
6. A pair of pipe insertion holes having different inner diameters are provided at both ends thereof.
To (3), the jig for marking according to any one of (3) to (3).
With this configuration, it is possible to perform marking on various types of pipes having different outer diameters while simplifying the configuration of the marking jig, and it is convenient to carry.

[0052]

As described above in detail, according to the present invention, the following effects can be obtained. According to the marking jig of the invention described in any one of the first to fifth aspects, it is possible to easily perform marking on the distal end portion of the pipe even when working gloves are worn.

[Brief description of the drawings]

FIG. 1A is a plan view showing a marking jig into which a pipe according to an embodiment is inserted, and FIG. 1B is a plan sectional view thereof.

2A is a bottom view showing the marking jig of the embodiment, FIG. 2B is a plan sectional view thereof, and FIG. 2C is FIG. 2A.
Sectional drawing which shows the marking jig seen from 2c-2c line.

FIG. 3 is an exploded perspective view showing the pipe and the one-touch joint of the embodiment.

FIG. 4 is a plan view showing a state before connecting a pipe to a one-touch joint.

FIG. 5 is a partial sectional view showing a one-touch joint to which a pipe is connected.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Jig for marking, 2a ... 1st pipe insertion hole as a pipe insertion hole, 2b ... 2nd pipe insertion hole as a pipe insertion hole, 3a ... 1st pipe as a pipe, 3b ... 2nd pipe as a pipe , 4a: first contact portion as contact portion, 4b: second contact portion as contact portion, 5a: first contact confirmation window as contact confirmation window, 5b ... contact confirmation window A second contact confirmation window, 6a... A first gripper as a gripper,
6b: a second grip portion as a grip portion; 7a, a first inner diameter display portion as a display portion; 7b, a second inner diameter display portion as a display portion; 8, a marking position display portion as a display portion; Instructions for use display section.

Claims (5)

[Claims] 1. A marking jig used for marking a position separated by a predetermined length from a tip of a pipe, comprising: a pipe insertion hole for removably inserting a tip of a pipe; A contact portion provided at the inner back portion of the insertion hole and configured so that the tip of the pipe is brought into contact with the contact portion, and the contact portion is separated from the opening end of the pipe insertion hole by a predetermined length. A marking jig characterized by being provided. 2. A contact confirmation window is provided at a side portion of the pipe insertion hole, and when the tip of the pipe is inserted into the pipe insertion hole, it is confirmed that the tip of the pipe is in contact with the contact portion. The marking jig according to claim 1, wherein the marking jig is configured to be able to perform the marking. 3. The marking jig according to claim 1, wherein a plurality of pipe insertion holes having different inner diameters are provided. 4. The marking jig according to claim 1, wherein a grip is provided on an outer surface of an opening end of the pipe insertion hole. 5. The marking jig according to claim 1, wherein a display unit is provided on an outer surface of the pipe insertion hole to display a method of use.