JPH08159345A - Bent state holder for flexible resin tube - Google Patents

Abstract

PURPOSE: To provide a bent state holder having the capability of being easily mounted on a flexible resin tube and keeping the tube bent over a long term by providing the joint of two rotatably connected main links with a tube bearing member for supporting the inner side of the tube, and further providing the outer ends of the links with tube presser members for pressing the outer side of a bent tube section. CONSTITUTION: This holder 11 for keeping a flexible resin tube for interior piping in a bent state, rotatably joints the inner ends of main links 13a and 13b of the same length via a shaft pin 15, and the jointed section is fitted with a tube support member 19 of approximately semi-circular cross section for receiving the inner side of the tube. Also, the outer ends of the links 13a and 13b are fitted with tube presser members 21a and 21b for pressing the outer side of the tube via shaft pins 17a and 17b. Furthermore, one end of an angle setting link 23 is supported on one outer end of one link 13a via the pin 17a, and the pin 17b is coupled to a hole formed out of a slot 25 and a branched hole 27 on the other end thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bent state holder suitable for holding a resin flexible tube for indoor piping in a bent state.

[0002]

2. Description of the Related Art Recently, a flexible resin tube with a heat insulating layer has been used for cold and hot water pipes for indoor air conditioning and drain pipes. This kind of flexible resin tube is used to connect two pipe joints installed at fixed positions without branching. The piping route in the middle of the flexible resin pipe is basically free, but the pipe near the end of the flexible resin pipe should be parallel to the axial direction of the flexible joint for connection to the flexible joint. There must be.

However, if a sufficient piping space cannot be secured near the pipe joint, there may be a case where the flexible resin tube must be bent with a small radius of curvature near the pipe joint. Although the flexible resin tube has flexibility, it also has a certain degree of rigidity.
A force of about 8 kgf is required to bend 90 ° at 00 mm. It is not easy to connect the end of the resin flexible tube to the pipe joint while keeping the vicinity of the end of the resin flexible tube in a bent state by such a force, and it is difficult for one person to do the work. It has to be a tedious task. Further, even if the connection to the pipe joint is completed, the elastic restoring force of the resin flexible tube is applied to the pipe joint, so that the reliability of the connection portion is reduced.

In order to deal with such a problem, the actual exploitation Sho 57
No. 180422 discloses a holder for holding a flexible resin tube in a bent state. In this holder, tube holding portions that hold the outside of the bent tube to fix the tube in a bent state are integrally formed at both ends of a guide portion that curves along the inside of the bent tube.

[0005]

However, this holder has the following problems.
Since it is necessary to bend the pipe to attach it to the pipe, the work of attaching it to the pipe is troublesome. Further, since the intermediate guide portion may be twisted or deformed, it is difficult to stably maintain the bent state of the pipe for a long period of time. Furthermore, since it has a difficult three-dimensional shape, it is difficult to manufacture and there is a problem that the cost becomes high.

An object of the present invention is to provide a bent state holding tool for a resin flexible tube which is easy to attach to the resin flexible tube, can hold the tube in a bent state for a long time, is easy to manufacture, and is inexpensive. To do.

[0007]

In order to achieve this object, the bending state holding tool of the present invention has two main links rotatably connected to each other at their inner ends, and the two main links are rotated at their inner ends. A tube that is movably connected and has a pipe receiving member that receives the inside of the bend of the resin flexible tube at the connecting portion of the two main links, and that holds the outside of the bend of the resin flexible tube at the outer ends of the two main links. A structure in which a pressing member is attached, and an angle fixing mechanism is provided between the two main links to allow the rotation of the two main links in the direction of decreasing the included angle and to serve as a stopper in the direction of increasing the included angle. (Claim 1).

The bending state holding tool is attached to the resin flexible tube before bending the resin flexible tube. After that, if the bending force is released by bending the resin flexible tube to a required angle (reducing the included angle of the two main links), the elastic restoring force of the resin flexible tube reduces the included angle of the two main links. It works in the direction of increasing it. As a result, the angle fixing mechanism serves as a stopper, which holds the resin flexible tube in a bent state at that angle.

Since this bent state holder can be attached to the resin flexible tube before bending the resin flexible tube, it can be easily attached to the resin flexible tube. In addition, since there is no risk of twisting or deformation, the bent state can be stably maintained. Furthermore, since it can be configured by combining simple parts such as a link, it is easy to manufacture and the cost is low.

The angle fixing mechanism in the bending state holding tool of the present invention has one end rotatably attached to the outer end of one main link, and a long hole in the longitudinal direction on the other end side and the other from the long hole. With an angle fixing link having a plurality of branch holes branched obliquely toward the end, and a shaft pin that is attached to the outer end of the other main link and is movable in the oblong hole and the branch hole of the angle fixing link. It can be configured (claim 2).

With this configuration, the included angles of the two main links can be adjusted stepwise depending on which branch hole of the fixed angle link the shaft pin is positioned, so that the bending angle of the resin flexible tube can be adjusted to the situation at the site. It is possible to set it.

Further, the angle fixing mechanism in the bending state holding tool of the present invention has two "doglegged" links whose base ends are rotatably attached to the outer ends of the two main links, and two "links". Two "ku" between the tips of the "ku" shaped link
The character-shaped link can be configured with an intermediate link that is connected so as to be interdigitated with each other (claim 3).

When such an angle fixing mechanism is used, 2
The rotation in the direction of increasing the included angle of the two main links is locked only by rotating the two main links to the place where the two “U” -shaped links interlock with each other. The bending angle can be set easily and surely.

[0014]

【Example】

[Embodiment 1] FIGS. 1 to 5 show a first embodiment of the present invention (corresponding to claim 1 + 2). 1 and 2 are a front view and a rear view when the bending state holding tool of this embodiment is in a straight line state, and FIGS. 3A to 3C are lines AA to C of FIG.
A sectional view taken along the line C and FIGS. 4 and 5 are a front view and a rear view in a bent state.

This bent state holding tool 11 has a length of 2
It has one main link 13a, 13b. Main link 1
The inner ends of 3a and 13b are rotatably connected by a shaft pin 15. A pipe receiving member 19 that receives the inside of the bending of the resin flexible pipe P (dashed line) by a shaft pin 15 is attached to the connecting portion between the main links 13a and 13b. Further, the shaft pin 1 is provided at the outer end of each of the main links 13a and 13b.
Pipe pressing members 21a and 21b for pressing the outside of the bend of the resin flexible tube P by 7a and 17b are attached.
The pipe receiving member 19 and the pipe pressing members 21a and 21b are members each having a substantially semicircular cross section that fits the outer peripheral surface of the resin flexible tube P.

Further, one end of the fixed angle link 23 is rotatably attached to the outer end of the one main link 13a by a shaft pin 17a. The fixed angle link 15 has a length that is almost twice that of the main link, and the other end side has a long hole 25 extending in the link longitudinal direction and the long hole 25.
A plurality of branch holes 27 that are obliquely branched from the to the other end. A shaft pin 17b attached to the outer end of the main link 13b is movably inserted into a hole formed by the elongated hole 25 and the branch hole 27.

The structure of the bent state holding tool 11 is as described above. Next, a method of using the bent state holding tool 11 will be described. First, as shown in FIG. 1, the resin flexible tube P is attached to the portion to be bent in a substantially linear state. The attachment is performed so that the pipe receiving member 19 is located inside the bend of the flexible resin tube P about to be bent, and the pipe holding members 21a and 21b are located outside the bend. When the resin flexible tube P is bent in this state, the main links 13a and 13b also bend around the shaft pin 15 (rotate in a direction to reduce the included angle α). At this time, the shaft pin 17b moves along the elongated hole 25.

When the resin flexible tube P is bent to a required angle, the shaft pin 17b is introduced into the nearby branch hole 27 (the state shown in FIGS. 4 and 5) to release the bending force of the resin flexible tube P. . Then, the elastic restoring force of the resin flexible tube P causes the main link 13
Although the a and 13b try to rotate in the direction of increasing the included angle, the main links 13a and 13b are fixed at that angle because the shaft pin 17b is caught in the branch hole 27 and cannot move. Therefore, the resin flexible tube P is held in a bent state.

[Second Embodiment] FIGS. 6 to 8 show a second embodiment of the present invention (corresponding to claim 1 + 3). FIG. 6 is a front view of the bent state holding tool of this embodiment when it is in a straight line state, and FIG.
6A to 6C are cross-sectional views taken along the lines AA to CC of FIG. 6, and FIG. 8 is a front view in a bent state.

This bent state holding tool 11 also has main links 13a and 13b, shaft pins 15 and 17, as in the above embodiment.
a, 17b, pipe receiving member 19 and pipe pressing member 21
a and 21b. This bending state holding tool 11 is different from the above-mentioned embodiment in that the mechanism for fixing the angles of the main links 13a, 13b has two "dogleg" links 29a, 2b.
9b and the intermediate link 31.

The two "V" -shaped links 29a and 29b are rotatably attached to the outer ends of the main links 13a and 13b, respectively. Further, one end of the intermediate link 31 is rotatably attached to the tip of one of the V-shaped links 29a by a shaft pin 33. The other end of the intermediate link 31 is rotatably attached by a shaft pin 35 to the tip end of the other "V" shaped link 29b.
With respect to the distance between the shaft pins 33 and 35, when the main links 13a and 13b are bent to a required angle, the two "dogleg" links 29a and 29b interlock with each other as shown in FIG. It is set so that it cannot be opened.

Note that ribs 37a and 37b as shown by broken lines in FIG. 6 are formed on the back surfaces of the "V" shaped links 29a and 29b, and the "V" shaped links 29a and 29b are mutually connected as shown in FIG. This rib 37
The a and 37b are in contact with each other to stabilize the state.

Further, it is preferable that the hole through which the shaft pin 35 of the intermediate link 31 passes is constituted by the elongated hole 25 and a plurality of branch holes 27 similar to those in the above-mentioned embodiment. With this configuration, the distance between the shaft pins 33 and 35 can be adjusted, and thus the fixed angles of the main links 29a and 29b can be adjusted in multiple stages.

The method of using the bent state holding tool 11 is the same as that in the above-mentioned embodiment. That is, as shown in FIG. 6, when the main links 13a and 13b are attached to the resin flexible tube P in a substantially linear state and then the resin flexible tube P is bent to a required angle, as shown in FIG. The V-shaped links 29a and 29b become intricate with each other. In this state, even if the bending force of the resin flexible tube P is released, the angles of the main links 13a and 13b cannot be opened.
The bent state is maintained at the angle regulated by a and 13b.

[0025]

As described above, the bending state holding tool of the present invention can be attached to the resin flexible tube before bending the resin flexible tube and can be bent together with the resin flexible tube. Can be easily attached to a flexible tube. Further, since there is no possibility of twisting or deformation even when bent, there is an advantage that the bent state of the resin flexible tube can be stably maintained. Furthermore, since it can be configured with a combination of simple parts such as links, it is easy to manufacture and is advantageous in cost reduction.

[Brief description of drawings]

FIG. 1 is a front view of a bent state holding tool according to a first embodiment of the present invention in a linear state.

FIG. 2 is a rear view of the state shown in FIG.

3A is a line AA in FIG. 1, and FIG. 3B is a line BB in FIG.
Line (C) is a cross-sectional view taken along the line CC.

FIG. 4 is a front view of the bent state holder of FIG. 1 in a bent state.

FIG. 5 is a rear view of the state of FIG.

FIG. 6 is a front view of a bent state holding tool according to a second embodiment of the present invention in a straight state.

7A is a line AA in FIG. 6, and FIG. 7B is a line BB in FIG.
Line (C) is a cross-sectional view taken along the line CC.

FIG. 8 is a front view of the bending state holding tool of FIG. 6 in a bending state.

[Explanation of symbols]

 11: Bending state holding tool 13a, 13b: Main link 15, 17a, 17b: Shaft pin 19: Pipe receiving member 21a, 21b: Pipe pressing member 23: Angle fixing link 25: Long hole 27: Branch hole 29a, 29b: " V-shaped link 31: Intermediate link 33, 35: Shaft pin

Claims (3)

[Claims] 1. A tube receiving member (19) for rotatably connecting two main links (13a, 13b) at an inner end thereof and for receiving a bending inner side of a resin flexible tube P at a connecting portion of the two main links. )
Attached to the outer ends of the two main links to hold the outside of the bend of the resin flexible tube P (21a, 21b).
Is attached between the two main links (13a, 13b) to allow rotation of the two main links in the direction of decreasing the included angle, and to provide an angle fixing mechanism that serves as a stopper in the direction of increasing the included angle. A bent state holding tool for a resin flexible tube, which is provided. 2. An angle fixing mechanism comprises one main link (13).
One end is rotatably attached to the outer end of a), and a long hole (25) in the longitudinal direction is provided on the other end side, and a plurality of branch holes (27) that branch obliquely from the long hole toward the other end. ) And an axial pin (17b) which is attached to the outer end of the other main link (13b) and is movable in the oblong hole and the branch hole of the angle fixing link. The bent state holding tool for a resin flexible tube according to claim 1, wherein: 3. The angle fixing mechanism comprises two main links (13).
a, 13b) two "doglegged" links (29a, 29a) each of which has a proximal end rotatably attached to an outer end thereof.
b) and an intermediate link (31) for connecting the two "doglegged" links so that the tips of the two "doglegged" links can be interdigitated with each other. The bent state holding tool for a resin flexible tube according to claim 1.