JP3952014B2 - Fixing band and joint - Google Patents

Description

  The present invention relates to, for example, a fixing band for fixing a resin pipe, a rubber hose and the like inserted into a joint such as a bamboo shoot joint, and a joint to which the fixing band is attached.

  An example of a fixing band for fastening and fixing a resin pipe or the like inserted into a plugged portion of a joint such as a bamboo shoot joint is shown in FIG. As shown in FIGS. 2A and 2B, the fixed band 50 is tightened to the inner side in the radial direction by reducing the diameter of the end portion of the resin pipe P inserted into the inserted portion 61 of the joint 60. And an annular fastening band 51 urged in the reduced diameter direction, and operation parts 52a and 52b for expanding the diameter of the fastening band 51 to a tightening release state, and a connecting part connected to the fastening band 51. 53 is embedded in the base end portion 62 of the resin-molded joint 60 so that the fixing band 50 is integrated with the joint 60 in advance.

  Therefore, when the resin pipe P is connected to the joint 60, the resin pipe is connected to the inserted portion 61 of the joint 60 in a state where the operating portions 52a and 52b of the fixed band 50 are operated to expand the diameter of the fastening band 51. After the P is inserted, when the tightening release state of the tightening band 51 by the operation parts 52a and 52b is released, the tightening band 51 is reduced in diameter, and the end of the resin pipe P inserted into the inserted part 61 is the tightening band 51. Is fastened and fixed to the joint 60.

JP 2001-65765 A

  By the way, since the fixed band 50 as described above is integrated with the joint 60 in advance, the resin pipe P inserted into the inserted portion 61 of the joint 60 is not forgotten to be fixed by the fixed band 50. When the resin pipe P is connected to the joint 60, the fastening band 51 is arranged so that the resin pipe P can be inserted into the inserted portion 61 of the joint 60 by operating the operation parts 52 a and 52 b of the fixed band 50. There is a problem that the connection workability of the resin pipe P to the joint 60 is poor because the diameter must be kept expanded.

  Accordingly, an object of the present invention is to provide a fixing band and a joint that do not forget to fix the pipe or hose inserted into the joint and that does not deteriorate the connection workability of the pipe or hose to the joint. .

  In order to solve the above-described problem, the invention according to claim 1 includes an attachment portion attached to the base end portion of the joint, and a main body portion connected to the attachment portion, and the main body portion is reduced in diameter. By tightening the end of the pipe or hose inserted into the inserted portion of the joint, an annular tightening band biased in the diameter reducing direction and the tightening band connected to the tightening band are expanded. An operating portion for making a diameter; and a holding member for holding the fastening band in a diameter-expanded state by engaging with the operating portion, wherein the holding member is the pipe to the inserted portion of the joint. Alternatively, the fixing band is provided in which the holding member is disengaged from the operation portion in accordance with the insertion operation of the hose.

  Moreover, in order to solve said subject, the invention concerning Claim 2 provides the coupling with which the fixed band of Claim 1 was attached.

  The invention according to claim 3 is the joint of the invention according to claim 2, wherein a lubricant made of silicon oil compound is applied in advance to the outer surface of the insertion portion into which the pipe or the hose is inserted. .

  According to a fourth aspect of the present invention, in the joint according to the third aspect of the present invention, a cap that covers the inserted portion is detachably attached.

  As described above, the fixed band according to the first aspect of the present invention has the holding member that holds the tightening band in the diameter-enlarged state by engaging with the operation portion that expands the diameter of the tightening band. When inserting a pipe or hose into the insertion part of the joint, there is no need to operate the operation part in order to keep the tightening band in the expanded diameter state, and the holding member is a pipe or hose to the insertion part of the joint Since the engagement with the operation part is released along with the insertion operation, after inserting the pipe or hose into the insertion part of the joint, the pipe or hose is tightened and fixed with the fastening band. Therefore, it is not necessary to operate the holding member.

  Therefore, if the fixing band described above is attached in advance as in the joint of the invention according to claim 2, the pipe or hose inserted into the inserted portion is fixed without reducing the connection workability of the pipe or hose. It is possible to reliably prevent the band from being forgotten to be fixed.

  Further, in the joint according to the third aspect of the present invention, since the lubricant made of silicon oil compound is preliminarily applied to the outer surface of the inserted portion, the pipe or hose can be smoothly and easily inserted into the inserted portion. The connection workability of pipes and hoses can be further improved.

  Further, in the joint according to the fourth aspect of the present invention, since the inserted portion is covered with the cap, the lubricant applied to the outer surface of the inserted portion is surely secured until the pipe or hose is actually inserted. The dust can be prevented from adhering to the inserted portion.

  Hereinafter, embodiments will be described with reference to the drawings. As shown in FIGS. 1 to 3, the fixing band 1 is fixed by tightening a resin pipe inserted into a plugged portion 31 in which a plurality of step portions each having a small diameter at the tip side of the bamboo shoot joint 30 are connected. For this purpose, the base end portion 32 of the bamboo shoot joint 30 is attached in advance.

  As shown in FIGS. 1 to 3, the fixing band 1 includes a main body 10 that tightens the outer peripheral surface of the end portion of the resin pipe inserted into the insertion portion 31 of the bamboo shoot joint 30 to the inside in the radial direction, and the main body 10. And a mounting portion 20 that attaches the portion 10 to the base end portion 32 of the bamboo shoot joint 30, and the mounting portion 20 has three locking claws 21 projecting radially inwardly on the outer peripheral surface of the base end portion 32. By being fitted into the circumferential groove, the base end portion 32 of the bamboo shoot joint 30 is held.

  The main body 10 has an annular tightening band 11 urged in the diameter reducing direction, which tightens the end of the resin pipe inserted into the insertion part 31 of the bamboo shoot joint 30 by reducing the diameter, and the tightening band 11. As the operation part for expanding the diameter of the fastening band 11, the pair of knobs 12 a and 12 b connected to both ends of the fastening band 11 and the pair of knobs 12 a and 12 b are engaged with each other so as to cross each other. And a holding member 13 that holds the accessory 11 in a diameter-expanded state. When the pair of knobs 12a and 12b are picked and brought close to each other, the fastening band 11 is increased in diameter.

  The holding member 13 is inserted into a holding portion 13a that holds the pair of knob pieces 12a and 12b close to each other, and a inserted portion 31 of the bamboo shoot joint 30 that is connected to the holding portion 13a. An annular abutting portion 13b is provided, and an insertion end of a resin pipe inserted into the inserted portion 31 of the bamboo shoot joint 30 comes into contact with the annular abutting portion 13b.

  As shown in FIG. 3, the fixed band 1 configured as described above expands the diameter of the fastening band 11 by sandwiching the pair of knobs 12 a and 12 b by the sandwiching portion 13 a of the holding member 13. 11 and the abutting portion 13b of the holding member 13 are attached in advance to the base end portion 32 of the bamboo shoot joint 30 via the attachment portion 20 in a state of being inserted into the inserted portion 31 of the bamboo shoot joint 30. .

  In the bamboo shoot joint 30 in which the fixing band 1 is attached in advance as shown in FIG. 4, when the resin pipe P is inserted into the inserted portion 31, the resin pipe P inserted into the inserted portion 31 is inserted. Since the insertion end comes into contact with the contact portion 13b of the holding member 13, when the resin pipe P is further pushed in, the holding member 13 moves backward as shown in FIG. The gripping pieces 12a and 12b by the holding portion 13a are released, the fastening band 11 is reduced in diameter by the urging force acting on the fastening band 11, and the resin pipe inserted into the insertion portion 31 of the bamboo shoot joint 30 The end of P is fastened and fixed by the fastening band 11.

  Note that a lubricant made of a silicone oil compound having properties and characteristics as shown in Table 1 is preliminarily applied to the outer peripheral surface of the inserted portion 31 of the bamboo shoot joint 30, and the inserted portion of the bamboo shoot joint 30. The hard resin pipe P can be smoothly and easily inserted into 31. Particularly important properties as a lubricant are the three items of “Consistency”, “Degree of oil separation” and “Volatile content” in Table 1. In the usable temperature range, it should have a suitable viscosity, have little separation of components, have few components that volatilize easily, and can maintain the expected lubricating effect over a long period of time.

  Further, as described above, for example, as shown in FIG. 6, the bamboo shoot joint 30 in which the lubricant is applied to the insertion portion 31 is provided with an internal protrusion 41 that protrudes rearward from the tip portion. The protective cap 40 is attached in a state where the outer peripheral surface of the inserted portion 31 is hardly contacted, such as to be fitted to the flow path 30 a of the portion 31, and the resin pipe is attached to the inserted portion 31 of the bamboo shoot joint 30. Before inserting P, the lubricant cannot be removed from the outer surface of the inserted portion 31. Therefore, when the resin pipe P is inserted into the inserted portion 31 of the bamboo shoot joint 30, the attached protective cap 40 is first removed from the bamboo shoot joint 30.

  As described above, the fixed band 1 includes the holding members 13 that hold the fastening band 11 in the diameter-expanded state by holding the knobs 12a and 12b that expand the diameter of the fastening band 11 in a state where they are close to each other. Therefore, when the resin pipe P is inserted into the insertion portion 31 of the bamboo shoot joint 30, it is not necessary to operate the knobs 12a and 12b in order to keep the tightening band 11 in the diameter-enlarged state. The member 13 is configured such that the gripping of the knobs 12a and 12b is released in accordance with the insertion operation of the resin pipe P into the insertion portion 31 of the bamboo shoot joint 30. After the resin pipe P is inserted into the insertion portion 31, it is not necessary to operate the holding member 13 in order to fasten and fix the resin pipe P with the fastening band 11.

  Therefore, as described above, in the bamboo shoot joint 30 to which the fixed band 1 is attached, the resin pipe P inserted into the inserted portion 31 is not removed by the fixed band 1 without reducing the connection workability of the resin pipe P. It is possible to reliably prevent forgetting to fix.

  7 to 10 show other embodiments of the fixing band. Since the fixed band 2 also basically has the same configuration as the fixed band 1 described above, the same constituent elements are denoted by the same reference numerals and the description thereof is omitted, and are different constituent elements. The holding member 14 will be described in detail.

  As shown in the figure, the holding member 14 employed in the fixing band 2 includes a rectangular plate-like body that can receive the knobs 12a and 12b that are separated from each other, and the opening 14a. 14a is formed with a slit-like insertion recess 14b extending rearward from the rear end edge of 14a and capable of being inserted in a state in which the pair of knobs 12a and 12b are brought close to each other. From the rear edge, the contact portion 14c with which the insertion end of the resin pipe P inserted into the insertion portion 31 of the bamboo shoot joint 30 contacts is suspended.

  As shown in FIG. 8, the fixing band 2 configured as described above is inserted into the insertion recess 14b of the holding member 14 so that the pair of knobs 12a and 12b are brought close to each other, that is, tightened. In a state where the diameter of the accessory 11 is expanded, it is attached in advance to the base end portion 32 of the bamboo shoot joint 30 via the attachment portion 20, and when the resin pipe P is inserted into the inserted portion 31 of the bamboo shoot joint 30, As shown in FIG. 9, since the insertion end of the resin pipe P inserted into the inserted portion 31 contacts the contact portion 14c of the holding member 14, when the resin pipe P is further pushed in, as shown in FIG. In addition, the holding member 14 is pushed back by the resin pipe P, and the knobs 12a and 12b are detached from the insertion recess 14b of the holding member 14 with this, so that the biasing force acting on the fastening band 11 is Fastening band 11 is contracted And, the ends of the plastic pipe P plugged into the insertion portion 31 of the bamboo shoots joint 30 is fastened by the tightening band 11.

  11 to 14 show other embodiments of the fixing band. In each of the fixing bands 1 and 2 described above, the holding members 13 and 14 that hold the pair of knobs 12a and 12b close to each other are completely separated from the knobs 12a and 12b. The band 3 is different from the fixed bands 1 and 2 in that the holding member 15 is integrally formed with the one knob 12a.

  As shown in the figure, the holding member 15 employed in the fixed band 3 includes a latching portion 15a that is cut and raised from one knob 12a and that latches the other knob 12b, and one knob. It is comprised from the contact part 15b with which the insertion end of the resin pipe P inserted in the to-be-inserted part 31 of the bamboo shoot joint 30 was connected to the rear end edge of the piece 12a, and contacted with the latching part 15a. By hooking the other knob 12b, the pair of knobs 12a, 12b is held in a state of being close to each other, and the insertion end of the resin pipe P inserted into the insertion portion 31 of the bamboo shoot joint 30 Is brought into contact with each other, so that one of the tabs 12a is elastically deformed, and accordingly, the latching of the other tab 12b by the latching portion 15a is released.

  As shown in FIG. 12, the fixing band 3 configured as described above causes the pair of tabs 12 a and 12 b to approach each other by hooking the tab 12 b on the hook 15 a of the holding member 15. In this state, that is, in a state where the diameter of the fastening band 11 is expanded, it is attached in advance to the base end portion 32 of the bamboo shoot joint 30 via the attachment portion 20, and resin is inserted into the inserted portion 31 of the bamboo shoot joint 30. When the pipe P is inserted, as shown in FIG. 13, the insertion end of the resin pipe P inserted into the inserted portion 31 comes into contact with the contact portion 15b of the holding member 15, so that the resin pipe P is further pushed in. The knob 12a, which is pushed by the resin pipe P and is continuously provided with the holding member 15, is elastically deformed. Accordingly, the knob 15a of the holding member 15 cut and raised from the knob 12a is picked. Because 12b comes off 14, the tightening band 11 is reduced in diameter by the urging force acting on the tightening band 11, and the end of the resin pipe P inserted into the inserted portion 31 of the bamboo shoot joint 30 is tightened by the tightening band 11. It is fixed.

  Moreover, in this fixed band 3, the pair of tabs 12a and 12b are brought close to each other by hooking the other tab 12b to the hook 15a cut and raised from the one tab 12a. However, the present invention is not limited to this. For example, as in the case of the fixed band 4 shown in FIGS. 15A and 15B, the latch piece 16a cut and raised from one of the knob pieces 12a. Is held by the slit 16b formed in the other knob 12b, so that the pair of knobs 12a and 12b are held close to each other, as shown in FIGS. 16 (a) and 16 (b). Like the fixed band 5, the latching portion 17 a is formed by folding back one of the tabs 12 a itself, and the other tabing piece 12 b is latched on the latching portion 17 a, thereby a pair of tabs 12 a and 12 b. Mutually connected It may be held in a state of being. In these fixed bands 4 and 5, as in the above-described fixed band 3, the contact portions 16 c and 17 b constituting the holding members 16 and 17 are connected to the rear end edge of one knob 12 a. When the insertion end of the resin pipe P inserted into the insertion portion 31 of the bamboo shoot joint 30 comes into contact with the contact portions 16c and 17b, one of the tabs 12a is elastically deformed. The holding of the other knob 12b is released.

  Further, in the above-described fixing bands 1, 2, 3, and 4, the three locking claws 21 projecting radially inward of the attachment portion 20 are formed in the circumferential groove formed on the outer peripheral surface of the base end portion 32 of the bamboo shoot joint 30. By fitting, it is designed to be held by the base end portion 32 of the bamboo shoot joint 30, but is not limited to this, for example, like the mounting portion 20 employed in the fixed band 5, A fixed band 5 is obtained by tightening and fixing an annular tightening band 22 energized in the diameter-reducing direction, in which a pair of knobs 23 a and 23 b are connected to both ends, to the base end 32 of the bamboo shoot joint 30. Is attached to the bamboo joint 30 or, like the attachment part 20 employed in the fixed band 6 shown in FIGS. By fitting the proximal end portion 32 of the joint 30, It may be attached to the band 6 to the bamboo shoots joint 30.

  Moreover, in each embodiment mentioned above, although the case where the resin pipe P was connected to the bamboo shoot joint 30 was demonstrated, it is not limited to this, When inserting and connecting a resin pipe, a rubber hose, etc. to various joints Needless to say, the fixed band of the present invention is useful.

It is a perspective view which shows one Embodiment of the fixed band concerning this invention. (A) is a perspective view which shows the main-body part (except a holding member) and attachment part which comprise the same fixed band, (b) is a perspective view which shows the holding member which comprises the same fixed band. . It is a perspective view which shows the bamboo shoot joint which attached the fixed band same as the above. It is a perspective view which shows the connection process of the resin pipe to a bamboo shoot joint same as the above. It is a perspective view which shows the connection process of the resin pipe to a bamboo shoot joint same as the above. It is sectional drawing which shows the protective cap with which the bamboo shoot joint same as the above was mounted | worn. It is a perspective view which shows the fixed band which is other embodiment. It is a perspective view which shows the bamboo shoot joint which attached the fixed band same as the above. It is a perspective view which shows the connection process of the resin pipe to a bamboo shoot joint same as the above. It is a perspective view which shows the connection process of the resin pipe to a bamboo shoot joint same as the above. It is a perspective view which shows the fixed band which is other embodiment. It is a perspective view which shows the bamboo shoot joint which attached the fixed band same as the above. It is a perspective view which shows the connection process of the resin pipe to a bamboo shoot joint same as the above. It is a perspective view which shows the connection process of the resin pipe to a bamboo shoot joint same as the above. (A) is a perspective view which shows the diameter-expanded state of the fixed band which is other embodiment, (b) is a perspective view which shows the diameter-reduced state of the fixed band same as the above. (A) is a perspective view which shows the diameter-expanded state of the fixed band which is other embodiment, (b) is a perspective view which shows the diameter-reduced state of the fixed band same as the above. (A) is a perspective view which shows the diameter-expanded state of the fixed band which is other embodiment, (b) is a perspective view which shows the diameter-reduced state of the fixed band same as the above. (A) is a side view which shows the conventional bamboo shoot joint with a fixed band, (b) is sectional drawing along the XX line of (a).

Explanation of symbols

1, 2, 3, 4, 5, 6 Fixed band 10 Main body 11 Tightening band 12a, 12b Knob (operating part)
13, 14, 15, 16, 17 Holding member 13a Clamping portion 13b Contact portion 14a Opening 14b Insertion recess 14c Contact portion 15a Latch portion 15b Contact portion 20 Mounting portion 21 Locking claw 30 Bamboo joint (joint)
30a Flow path 31 Inserted part 32 Base end part 40 Protective cap (cap)
41 Internal projection P Resin pipe (pipe)

Claims (4)

A mounting portion attached to the base end of the joint;
A main body portion connected to the mounting portion;
The main body portion tightens an end portion of a pipe or a hose inserted into the inserted portion of the joint by reducing the diameter, and an annular fastening band biased in the diameter reducing direction,
An operation unit that is connected to the fastening band and expands the diameter of the fastening band;
A holding member for holding the fastening band in an expanded state by engaging with the operation portion;
The holding member is configured such that the engagement of the holding member with the operation portion is released along with the insertion operation of the pipe or the hose into the insertion portion of the joint. And a fixed band.   A joint to which the fixing band according to claim 1 is attached.   The joint according to claim 2, wherein a lubricant made of silicon oil compound is applied in advance to the outer surface of the inserted portion into which the pipe or the hose is inserted.   The joint according to claim 3, wherein a cap that covers the inserted portion is detachably attached.

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