JP4522011B2 - Marking jig for flexible tube - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a marking jig for a flexible tube, and more particularly, a flexible tube for defining a depth of insertion when a flexible tube composed of a corrugated tube used for gas piping is inserted into a joint and joined to the joint. The present invention relates to a tube marking jig.
[0002]
[Prior art]
As a so-called one-touch joint that can be joined simply by inserting a flexible tube, for example, Japanese Patent Application No. 11-258152 describes a structure shown in FIG. The one-touch joint 1 shown in FIG. 5 is provided in the vicinity of a cylindrical main body 2, a retaining ring 3 whose tip is screwed into the cylindrical main body 2, and a distal end of the retaining ring 3 inside the cylindrical main body 2. The retainer 4 is provided.
[0003]
A sealing material 8 is attached to the inner peripheral portion of the cylindrical main body 2 on the back side of the retainer 4. This sealing material 8 is constituted by a cylindrical body in which a fire-resistant part 8A on the back side and a normal rubber part 8B on the opening side which has no fire resistance but has excellent sealing properties are integrated in the axial direction. .
[0004]
The flexible tube 5 connected to the joint has a configuration in which a thin metal corrugate tube 6 is covered with a resin cover 7.
In the one-touch joint having such a configuration, the flexible tube 5 in a state where the covering 7 is removed from the top of the corrugate pipe 6 is connected to the retaining ring 3, the retainer 4, and the sealing material from the end of the retaining ring 3. The flexible tube 5 can be connected to the joint 1 with a single touch by being inserted into the inside of the joint 8. The work at this time is usually performed manually by the operator.
[0005]
[Problems to be solved by the invention]
When the flexible tube 5 is connected to the joint 1 in this way, a plurality of peaks in the corgate pipe 6 pass through the position of the retainer 4 while elastically expanding the retainer 4 by the peaks of the corgate pipe 6. To work. For this reason, the reaction force at the time of the expansion is returned as a response when the flexible tube 5 is inserted.
[0006]
On the other hand, even when the insertion of the flexible tube 5 shown in FIG. 5 is completed, there is a response due to the tip of the corrugate tube 6 hitting the back end of the cylindrical main body 2, and it is difficult to distinguish between the responses.
[0007]
For this reason, although insertion of the flexible tube 5 shown in FIG. 5 is not completed, there is a possibility that the operator erroneously determines that the insertion is completed. That is, the tip of the corrugate tube 6 does not reach the back end of the cylindrical main body 2 or the tip of the corrugate tube 6 does not reach the refractory portion 8A of the seal member 8 or, in extreme cases, the seal member 8 There is a possibility that the joining operation will be terminated due to a misjudgment in a state where the normal rubber portion 8B is not reached.
[0008]
Among these, when the tip of the corrugate pipe 6 does not reach the normal rubber portion 8B of the sealing material 8, the sealing performance of the joint is poor, and when it does not reach the refractory portion 8A, it is exposed to a high temperature due to a fire or the like. Fire resistance performance will be poor.
[0009]
In addition, when the inner end of the cylindrical main body 2 is not reached, the fire-resistant portion 8A is fragile due to heat even though it is temporarily sealed by the fire-resistant portion 8A when exposed to a high temperature due to a fire or the like. Therefore, the reliability of the sealing performance when a lateral impact or the like acts on the joint or the flexible tube is lowered.
[0010]
Moreover, in this type of one-touch joint, when a pull-out force is applied to the flexible tube 5, the retainer 4 comes into contact with the taper surface 9 on the inner periphery of the retaining ring 3 based on the pull-out, so that the retainer 4 is connected to the corgate pipe 6. Since the break-in is prevented by biting into the valley, the allowance for the flexible tube 5 to be pulled out is set accordingly. Therefore, when the corrugate pipe 6 is not sufficiently pushed in, the conditions for the sealing performance become severer by the amount of the withdrawal.
[0011]
In order to cope with such a problem, the felt is located at a position corresponding to the required insertion length of the flexible tube 4 to the joint, that is, at a position corresponding to the insertion length from the tip of the corrugate tube 6. Marking may be performed by coloring with a pen or the like, and the flexible tube may be inserted into the joint to the position of the marking.
[0012]
However, in this case, it takes time to confirm the predetermined length at the time of marking. That is, for example, it is necessary to prepare a ruler and measure the length from the tip of the corrugate tube 6 and then perform marking. However, it is necessary to prepare a ruler etc. There is a possibility that a marking is made at an incorrect position.
[0013]
SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to solve such problems and to easily and accurately mark a predetermined position as an insertion margin in a flexible tube inserted into a joint.
[0014]
[Means for Solving the Problems]
In order to achieve this object, the jig for a flexible tube to be joined to this joint by being inserted into the joint according to the present invention is a flexible tube to be joined to this joint by being inserted into the joint. The flexible tube is configured to be inserted into the joint in a state in which the corrugate pipe is covered with a covering and several coverings at the tip of the corgate pipe are removed. The jig includes an engaging portion that engages with a distal end portion of the corrugate tube, and a main body portion that is disposed in a length direction of the flexible tube along an outer surface of the flexible tube. A through-hole portion that is bent in an L shape in a direction and a circumferential direction is formed, and a tip portion of a portion extending in the axial direction of the through-hole portion is formed to extend to a position to be removed from the covering. , Definitive on the surface of the covering body through the through hole is configured at a position corresponding to the insertion depth of the distal end portion of the flexible tube to be inserted into the fitting, to be able to apply the circumferential direction of the marking At the same time, the tip end portion in the axial direction of the through-hole portion is configured to recognize the position to be removed from the covering.
[0015]
In such a configuration, when marking the flexible tube, the main body of the jig is placed along the outer surface of the flexible tube with the engaging portion of the jig being engaged with the tip of the corrugate tube. By arranging the length of the flexible tube and marking the surface of the cover through the through hole, the position of the removed part of the cover of the corrugate tube and the insertion depth when inserting into the joint Each position corresponding to the position is marked easily and accurately.
[0016]
The flexible tube marking jig according to claim 2 is the flexible tube marking jig according to claim 1, wherein the main body portion is curved in the circumferential direction, and the engaging portion is folded back toward the center of curvature of the curve. It is what.
[0017]
Therefore, when the engaging part of the jig is engaged with the tip of the corrugate tube, the jig main body part is in a stable state along the outer surface of the flexible tube, so that it is easy to mark using the through hole. Become.
[0018]
The marking jig for flexible tubes according to claim 3 is the marking jig for flexible tubes according to claim 2, wherein the engaging portions bent toward the center of curvature of the main body are in the same direction at both ends of the main body. A bend is formed, and an incision is formed from both ends in an intermediate portion in the length direction, and the main body portion can be bent in a square shape on the side opposite to the center of curvature of the main body at the notch portion. .
[0019]
By folding back at the middle part, it becomes possible to use either side of the main body part, for example, by providing a through-hole part at a position suitable for each of pipes with different nominal diameters, it is possible to use various types of jigs It can be applied to flexible tubes.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the jig according to the embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4 and the same members as those shown in FIG.
[0021]
1 to 3, reference numeral 11 denotes a jig according to the present invention, which is formed by bending a metal strip-shaped plate material. That is, the jig 11 has a main body 12, and an engaging portion 13 that is bent in a direction of 90 degrees with respect to the main body 12 is integrally formed at the end of the main body 12.
[0022]
As shown in FIGS. 1 and 2, the flexible tube 5 is covered with several peaks at the tip of the corrugate tube 6 in the state where the tip is cut at the valley of the corgate tube 6 as in the case of FIG. It is inserted into the joint with the body 7 removed. Here, the thing which should remove the covering 7 for six mountains is illustrated.
[0023]
If the number of ridges to be removed is incorrect, the flexible tube 5 cannot be inserted into the joint up to a predetermined position and cannot be correctly connected to the joint, or the flexible tube 5 can be inserted up to a predetermined position. However, inconveniences such as incomplete sealing between the joint and the covering 7 occur.
[0024]
As shown in FIGS. 1 and 2, the jig 11 is used for the flexible tube 5 in a state in which the coverings 7 for the six peaks at the tip of the corrugate tube 6 have been removed.
[0025]
The main body 12 of the jig 11 is engaged with the engaging portion 13 on the tip of the corrugate tube 6 with the covering 7 removed for six mountains, and the main body 12 is attached to the outer surface of the flexible tube 5. Along the longitudinal direction of the flexible tube 5, the axial penetrating portion 14 is formed on the surface of the flexible tube 5 at a position corresponding to the six peaks, and the rear end of the axial penetrating portion 14 a is formed. Corresponds to the position of the entire insertion depth of the flexible tube 5 to be inserted into the joint, and a circumferential through portion 15 is provided by bending in an L shape in the circumferential direction.
[0026]
That is, as shown in FIG. 1, the axial through-hole portion 14 is formed as a long hole along the length direction of the flexible tube 5, that is, the main body portion 12, and the distal end portion of the corrugate tube 6 in the engaging portion 13 The distance D from the contact surface to the circumferential through hole 15 is formed to have a dimension corresponding to the length of the tip to be inserted into the joint in the flexible tube 5.
[0027]
Therefore, as shown in FIGS. 1 and 2, the jig 11 is attached to the flexible tube 5, and the axial through-hole portion 14 is used to move the end portion 14 a of the through-hole portion 14 farther from the engaging portion 13. By marking the surface of the covering 7 of the flexible tube 5 with a felt pen or the like up to the end and along the circumferential through-hole 15, the length of the tip to be inserted into the joint in the flexible tube 5 is removed. It is possible to easily and accurately mark the position of the covering.
[0028]
Further, when the jig 11 is applied to the flexible tube 5 as shown in FIG. 1, if the end of the covering 7 can be observed through the end 14 a closer to the engaging portion 13 in the through-hole portion 14, the covering It can also be inspected that 7 is removed by the proper number of ridges of the corrugate tube 6.
[0029]
The main body 12 of the jig 11 may have a flat plate shape, but is curved along the circumferential direction as shown in the drawing so that the outer periphery of the flexible tube 5 can be easily marked in the circumferential direction. It is preferable to bend in the direction of the center of curvature. In the case of a pipe having a large diameter, this curvature is not always necessary.
[0030]
FIG. 3 shows a state where the flexible tube 5 having the markings 15 applied to the entire through-hole portion 14 is inserted into the joint 1 by a predetermined length. As shown in the drawing, the flexible tube 5 is inserted until the circumferential marking 15a is hidden by the retaining ring 3, thereby inserting a predetermined length.
[0031]
By the way, actually, the flexible tube 5 and the joint 1 have various diameters, and the actual length is that the insertion length into the joint 1 is different for each diameter. Therefore, as shown in FIGS. 4A to 4C, a plurality of through-hole portions 14, 14,... Corresponding to the flexible tubes 5 having various diameters are formed in the main body portion 12 of the jig 11. You may do it. That is, you may form so that the above-mentioned distance D may differ for every through-hole part 14. FIG.
[0032]
And besides having the engaging part 13 in the one end side of the main-body part 12, you may provide the engaging part 16 in the other end side. As shown in the figure, when the main body part 12 is curved in the circumferential direction, these engaging parts 13 and 16 are bent toward the center of curvature of the curve, so when one of the engaging parts 13 is used. The main body part 12 is bent in the direction opposite to the center of curvature at the intermediate part as shown by a dotted line so that the engaging part 16 on the other side does not get in the way.
[0033]
Thus, when one engaging portion 13 is engaged with the tip of the corrugate tube 6, the other does not interfere with the flexible tube 5.
And the through-hole part 14 corresponding to the flexible tube 5 of another diameter is formed corresponding to the engaging part 16 of the other end side. Thereby, it is possible to deal with a very wide variety of flexible tubes with only one jig 11.
[0034]
As shown in FIG. 4, it is preferable that the diameter of the flexible tube adapted to each through hole portion 14 is displayed on the jig 11 by engraving or the like corresponding to each through hole portion 14. Reference numeral 17 denotes the aperture display portion, and the symbol such as “25A” described above represents the aperture. In addition, as shown in the figure, when the aperture display portion 16 is formed on the surface side of the main body portion 12 when the jig 11 is applied to the flexible tube, the main body portion 12 can be easily operated. It is convenient because the display can be confirmed.
[0035]
Further, as shown in FIG. 3, it is convenient to display the number of ridges of the corrugate tube 6 from which the covering body 7 is to be removed on the main body portion 12 in the same manner. Reference numeral 18 denotes the mountain number display section. In the figure, reference numeral 19 denotes a through hole for locking a hanging strap or the like.
[0036]
【The invention's effect】
As described above, according to the jig of the present invention, the corrugate tube is covered with the covering, and the flexible tube is inserted so as to be inserted into the joint in a state where several coverings at the tip of the corrugate tube are removed. And the jig includes an engaging portion that engages with a distal end portion of the corrugate tube, and a main body portion that is disposed in the length direction of the flexible tube along the outer surface of the flexible tube. Through-holes in the axial direction and the circumferential direction are formed, and the tip of the part extending in the axial direction of the through-hole part is formed to extend to a position to be removed from the covering, and through this through-hole part, shows the distal end of the insertion to be flexible tube by circumferential direction of the marking, allowed that markings circumferentially position the surface to be joint opening of the cover which corresponds to the length Since the axial tip of the through hole is configured to recognize the position to be removed from the cover, the position corresponding to the length of the tip to be inserted into the joint in the flexible tube Can be easily and accurately marked.
[0037]
Further, according to the present invention, since the through-hole portion is also opened at the position of the end portion of the covering body that has been removed by the normal number of the corrugate pipes, It can be checked whether the body has been removed by the correct number of piles of the corrugate tube.
[Brief description of the drawings]
FIG. 1 is a plan view showing an example of use of a flexible tube marking jig according to an embodiment of the present invention.
FIG. 2 is a side view of FIG.
FIG. 3 is a view showing a state in which a flexible tube marked with the jig is joined to a joint.
FIGS. 4A and 4B are explanatory diagrams of another configuration example of the flexible tube marking jig, where FIG. 4A is a plan view, FIG. 4B is a side view, and FIG. 4C is a front view;
FIG. 5 is a view in which a part of a conventional one-touch joint for flexible tube to which the jig of the present invention can be applied is cut away.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 5 Flexible tube 6 Corrugate pipe | tube 7 Covering body 11 Marking jig | tool 12 for flexible tubes The main-body part 13 Engagement part 14 Through-hole part 14a Through-hole end part 16 Engagement part

Claims (3)

It is a jig for a flexible tube to be joined to this joint by being inserted into the joint,
The flexible tube is configured to be inserted into the joint in a state where the corrugate tube is covered with a covering and several coverings at the tip of the corgate tube are removed,
The jig includes an engaging portion that engages with a distal end portion of the corrugate tube, and a main body portion that is disposed in the length direction of the flexible tube along the outer surface of the flexible tube,
A through-hole portion that bends in an L shape in the axial direction and the circumferential direction is formed in the main body portion, and a tip portion of a portion extending in the axial direction of the through-hole portion is extended to a position to be removed from the covering body. It is, the definitive through the through holes on the surface of the covering body, at a position corresponding to the insertion depth of the distal end portion of the flexible tube to be inserted into the joint, is configured to be able to apply the circumferential direction of the marking And a flexible tube marking jig characterized in that an axial front end portion of the through-hole portion is configured to recognize a position to be removed from the covering.   The marking jig for a flexible tube according to claim 1, wherein the main body portion is curved in the circumferential direction, and the engaging portion is folded and integrally formed toward the center of curvature of the curve.   At both ends of the main body, a hook portion bent toward the center of curvature of the main body is bent in the same direction, and an incision is formed from both ends in the middle portion in the length direction. The flexible tube marking jig according to claim 2, wherein the marking can be bent in a square shape on the opposite side of the curvature center of the main body.

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