JPS6235529Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an end face processing tool for crushing the end face of a flexible pipe to form a sealing surface.

Conventionally, the following types of end face processing tools have been developed. That is, it has a clamping half body with a gripping rod that is pivotally connected to a pivot shaft so as to be able to swing open and close, and a machined recess with a semicircular cross section is formed in the opposing surface of each clamping half body. It consists of a pipe holder that holds the flexible pipe in its processed recess by combining the holding halves, and an end face presser that presses against the processed end face of the flexible pipe and crushes the end face, This end face pressing tool has a male threaded portion formed on its outer periphery, and is screwed into a half-shaped female threaded hole formed when the holding halves are combined, so that it can move forward and backward. However, in such a half-split female threaded hole, when the clamping halves are assembled, the pivot joint part is likely to become misaligned due to rattling. When the other clamping half was closed after the male threaded portion of the end face pressing tool was screwed together, there was a risk that the screw thread would be crushed due to displacement. Moreover, such inconveniences are likely to occur due to the operator's own mistakes in attaching the pressing tool. Furthermore, during machining, the gripping halves tend to open due to the screwing of the end face presser, so the gripping rods must be tightly gripped throughout the work, reducing operability and worker fatigue. There was a problem with this point.

The present invention solves these conventional problems, and eliminates the risk of crushing the threads of the threaded portion of the clamping halves and the end face presser when the clamping halves are combined.
Another object of the present invention is to provide a flexible pipe end face processing tool that has good operability and reduces operator fatigue. Therefore, the feature of the present invention is that it has gripping halves with gripping rods that are pivotally connected to the pivot shaft so as to be able to swing open and close, and that each of the gripping halves has a semicircular cross section on the opposing surface. a pipe holder, which has a processed recess, and holds the flexible pipe in the processed recess by combining the holding halves;
In the end face processing tool comprising an end face pressing tool that presses against the end face to be processed of the flexible pipe and crushes the end face, a cylindrical part is integrally extended on one end side in the axial direction of one of the holding halves. , the inner periphery of the cylindrical portion is formed into a female threaded hole, and the outer periphery of the end face pressing tool is formed with a male threaded portion that is screwed into the female threaded hole, so that the pressing tool is screwed into the pipe holder. Freely move forward and backward,
The pressing tool is configured to be screwed forward by rotation of the handle and crush the processed end surface of the flexible pipe with its tip surface, and further, the pressing tool is engaged with the opposing surfaces of both the clamping halves in the combined state. In addition, a concave-convex engaging portion is formed to prevent displacement of both clamping halves in the axial direction due to the pressing force of the end face pressing tool.

Hereinafter, the present invention will be explained in detail based on drawings showing embodiments.

In FIGS. 1, 2, and 3, reference numeral 1 designates a flexible pipe used as a pipe for water supply, hot water, etc., and is formed in a bellows-like shape by alternating peaks 2 and troughs 3. The material generally used is metal such as stainless steel. The flexible pipe end face processing tool 4 for processing this includes a pipe holder 5,
It consists of an end face pressing tool 6 that crushes the processed end face 1a of the flexible pipe 1.

The pipe holder 5 has holding halves 8A and 8B pivotally connected to each other by the pivot shaft 7 so as to be able to swing open and close as shown by the solid line and the imaginary line in FIG. A grasping rod 9 to be grasped projects outward from the clamping halves 8A, 8B. Each of the holding halves 8A and 8B has a machined recess 10 having a semicircular cross section on the opposing surfaces, and the other holding half 8A has a cylindrical part at one end in the axial direction of the rectangular parallelepiped holding part 11. 12 are integrally extended. The other holding half 8B is only a rectangular parallelepiped holding part. A protruding strip 13 that fits into the trough 3 of the flexible pipe 1 is provided around the end of the cylindrical portion 12 of the processing recesses 10, 10, and the gripping rod 9 is swung around the pivot shaft 7. When the holding halves 8A and 8B are combined by moving, the protrusions 13 and 13 are formed around the entire circumference of the valley 3 of the flexible pipe 1.
is fitted as shown in FIG. 1, completely blocking the movement of the flexible pipe 1 in the axial direction.

Further, the cylindrical portion 12 is cut out from the holding portion 11 by a predetermined distance l on the same plane as the holding portion 11. The inner periphery of the cylindrical portion 12 is formed with a female screw hole 14, and the outer periphery of the end face presser 6 has a male screw portion 15 screwed into the female screw hole 14.
is formed, and the end face pressing tool 6 can be screwed forward and backward with respect to the pipe holder 5. Further, a manual knob 16 having a diameter larger than the outer diameter of the male threaded portion 15 and approximately the same diameter as the outer diameter of the cylindrical portion 12 is integrally formed on one end side of the end face pressing tool 6. A square hole 18 for connecting the handle 17 is formed in the center of the end face on the side of the manual knob 16, and a recess 19 is formed on the four inner circumferential surfaces of the square hole 18. That is, the square shaft portion 20 of the handle 17 is fitted into the square hole 18, and the steel ball 21 held in the hole of the square shaft portion 20 so as to be elastically retractable is fitted into the recess 19. The handle 17 is connected in a locking manner. In the illustrated example, a ratchet handle 17 is shown that can switch torque transmission between forward and reverse directions by rotating the knob 22.

Furthermore, the opposing surfaces of the holding halves 8A and 8B are formed with uneven engaging portions 23 and 24 that engage in the combined state. Specifically, a convex engaging portion 24 is provided on the end of one holding half body 8A having a cylindrical portion 12 on the opposite side from the cylindrical portion 12, and a convex engaging portion 24 is provided on the other holding half body 8B. is provided with a concave engaging portion 23 into which the convex engaging portion 24 fits when combined, so that when the holding halves 8A and 8B are combined, one holding half 8A is held against the other holding half. This prevents the half body 8B from shifting in the direction of arrow A (FIG. 1).

FIG. 4 shows the end face processing tool 4 for attaching a ring 25 to the collapsed end portion of the flexible pipe 1. As shown in FIG. This end face processing tool 4 has clamping halves 8A and 8B.
Two step portions 26 and 27 are formed at the ends of the processed recesses 10 and 10 on the side of the cylindrical portion 12, and the large diameter side step portion 27 closer to the cylindrical portion 12 is for tightening the ring. That is, the ring 25 has a C-shape with a slightly open mouth, and is loosely fitted into the valley 3 of the flexible pipe 1 and fitted into the large-diameter side step 27, and when the holding halves 8A and 8B are combined, the diameter is increased. It deforms in the contraction direction and is securely fastened to the outer peripheral surface of the valley portion 3. The rest of the structure is the same as that of the above embodiment, so the explanation thereof will be omitted.

Next, a case will be described in which the end face of the flexible pipe 1 is processed by the end face processing tool 4 described above. In FIG. 3, first, the end of the flexible pipe 1 is inserted into the processing recess 10 of the holding half 8A on one side of the end face processing tool 4 in the open state, so that the second trough 3 fits into the protrusion 13. Contain as it fits. That is, two peaks are made to protrude from the protrusion 13 toward the cylindrical portion 12 (usually by crushing the two peaks). In this state, the other clamping half 8B is closed, and the flexible pipe 1 is clamped by gripping the gripping rods 9, 9 with one hand. In addition, the end face processing tool 4 in FIG.
In this case, the other clamping half 8B is closed with the ring 25 fitted into the second valley 3 of the flexible pipe 1. Thereafter, with the other hand, turn the manual knob 16 of the end pressing tool 6 to screw the pressing tool 6 forward, so that its tip surface 6a comes into contact with or approaches the processed end surface 1a of the flexible pipe 1. and,
By rotating the handle 17, the pressing tool 6 is further screwed forward, and the tip end surface 6a is brought into pressure contact with the end surface 1a to be processed. As a result, the two end portions of the flexible pipe 1 are crushed, and the processed end surface 1a is formed into a sealing surface. Thereafter, the sandwiching halves 8A and 8B are opened and the processed flexible pipe 1 is taken out.

The state of the end portion of the flexible pipe 1 processed in this manner is shown in FIGS. 5 and 6. FIG. 5 shows the end face processed by the end face processing tool 4 shown in FIGS. 1 to 3, and FIG. 6 shows the end face processed using the end face processing tool 4 shown in FIG.

FIG. 7 shows an example of the use of the flexible pipe 1 whose end face has been processed as shown in FIG.
If the cap nut 28 is fitted onto the pipe 1 in advance, the end face is processed as described above, and the cap nut 28 is tightened to the male threaded portion 30 of the joint portion 29, the sealing nut 28 is crushed, flattened, and has a large diameter. The outer flange portion 31 is pressed evenly around the entire circumference by the cap nut 28 via the ring 25, and the seal member 32 is pressed against the end surface of the joint portion 29 to obtain sealing performance. Moreover, since the outer flange 31 is pressed evenly around the entire circumference through the ring 25, cracks occur near the outer flange 31 when the flexible pipe 1 is suddenly curved with a small radius of curvature. There are advantages to not doing so.

According to the embodiment of the present invention, by providing the end face pressing tool 6 with the hand turning knob 16 having approximately the same diameter as the outer diameter of the cylindrical portion 12, the pressing tool 6 can be screwed forward and backward quickly without using the handle 17. It can be carried out. Further, since the cylindrical portion 12 is cut by a predetermined dimension l,
The progress and status of machining can be viewed while working, which is convenient for work.

The present invention has effectively achieved the intended purpose with the configuration detailed above. In particular, a cylindrical portion 12 is integrally extended on one end side in the axial direction of one of the clamping half bodies 8A, and the inner periphery of the cylindrical portion 12 is formed into a female screw hole 14, and the outer periphery of the end face pressing tool 6 is formed. Since a male threaded portion 15 is formed to be screwed into the female threaded hole 14, and the pressing tool 6 can be screwed forward and backward with respect to the pipe holder 5, it can be held in place like a conventional half-split female threaded hole. There is no possibility of crushing the threads of the threaded joint between the half body and the end face presser.
Moreover, the operation is easy, and in particular, the end face pressing tool 6 can be always screwed into the cylindrical portion 12 of the holding half 8A, so that the end face pressing tool 6 will not be lost. Moreover, the clamping halves 8A, 8 during work
The force for grasping the gripping rods 9, 9 of B is relatively small, and the fatigue level of the operator can be reduced. Furthermore, since uneven engaging portions 23 and 24 that engage in the combined state are formed on the opposing surfaces of both the holding halves 8A and 8B,
During the crushing process by the end face pressing tool 6, the pressing can reliably prevent the other clamping half 8B from twisting at the pivoting portion.

[Brief explanation of the drawing]

Fig. 1 is a side view of an end face processing tool showing an embodiment of the present invention, Fig. 2 is a front view of the same, Fig. 3 is a side view of the holding half in an open state with some parts omitted, and Fig. 4. 7 shows another embodiment, a side view of the clamping half in an open state with some parts omitted; FIGS. 5 and 6 are sectional views of the end of the flexible pipe showing the finished state, respectively; and FIG. FIG. 2 is a partially cross-sectional side view showing an example of how to use the flexible pipe. DESCRIPTION OF SYMBOLS 1... Flexible pipe, 1a... End face to be processed, 5... Pipe holder, 6... End face pressing tool, 6
a... Tip surface, 7... Pivot shaft, 8A, 8B... Clamping half, 9... Gripping rod, 10... Machining recess, 12
...Cylindrical part, 14...Female threaded hole, 15...Male threaded part, 17...Handle, 23...Concave engagement part, 2
4... Convex engaging portion.

Claims (1)

[Claims for Utility Model Registration] It has gripping halves 8A and 8B with gripping rods 9 which are pivotally connected to the pivot shaft 7 so as to be able to swing open and close, and on the opposing surfaces of each of the gripping halves 8A and 8B. A pipe holder 5 is provided with a processed recess 10 having a semicircular cross section, and holds the flexible pipe 1 in the processed recesses 10 and 10 by combining the holding halves 8A and 8B, and the flexible pipe 1 In the end face processing tool, the cylindrical part 12 is integrally extended on one end side in the axial direction of one of the clamping half bodies 8A. The inner periphery of the cylindrical portion 12 is formed into a female threaded hole 14, and the outer periphery of the end face presser 6 has a male threaded portion 1 screwed into the female threaded hole 14.
5, so that the pressing tool 6 can be screwed forward and backward with respect to the pipe holder 5, and by rotating the handle 17, the pressing tool 6 is screwed forward and the tip surface 6a is held against the flexible pipe 1. Processed end surface 1a of
furthermore, both the clamping halves 8
On the opposing surfaces of A and 8B, both clamping halves 8A and 8B are engaged in a combined state and pressed by the end face pressing tool 6.
an uneven engagement portion 23 that prevents displacement in the axial direction of the
An end face processing tool for a flexible pipe, characterized in that it has a shape of 24.