JP3047998U - Pipe crimp restoration device - Google Patents

Abstract

(57) [Summary] [Problem] To restore a pipe crimped using a crimping machine,
The same crimping machine can be used very easily and without any trouble. SOLUTION: A plastic pipe P is crimped between a pressing blade 7 attached to an operating rod 6 and a lower arm 3, while a pressing die 10 for restoring the pressing blade 7 and the lower arm 3 is received. A die 11 is mounted, and a pipe crimping portion Pa is interposed between the restoring grooves 10Y and 11Y of the two dies 10 and 11 in a state where the crimping portion Pa is erected, and both end edges of the crimping portion Pa are recessed into the restoring grooves 10Y and 11Y, respectively. The provided engagement grooves 10a,
By pressing the pressing die 10 down by engaging with the pressing die 11a, the pipe crimping portion Pa is restored to a circular shape.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention is used in the technical field of a crimping machine for crimping a plastic pipe used for gas or water supply, and more specifically, a pipe crimping restoration device having a function of restoring a crimped plastic pipe. It is about.

[0002]

[Prior art]

 When repairing or replacing a water pipe made of a plastic pipe such as vinyl chloride, for example, a water pipe as disclosed in Japanese Utility Model Laid-Open Nos. 55-61690 and 57-143485, etc. By using a crimping machine, the water pipe is crimped (crushed) at an appropriate position and the water flow is cut off, so that each work is performed while preventing unnecessary water leakage.

[0003]

[Problems to be solved by the invention]

 The above crimping machine is configured to crimp a plastic pipe (water pipe) between the press blade and the frame by lowering the press blade attached to the operating rod. It is necessary to return the pipe to its original shape and flush it immediately after repair or replacement is completed.

However, the above-mentioned conventional crimping machine does not have a function of performing this restoration, and therefore, it is necessary to prepare special tools separately in order to restore the pipe, which makes the restoration operation very complicated. In addition, when restoring a crimped part that has been crimped in a substantially flat shape, applying force to the crimped part will make the plastic pipe slippery and rotate easily, making it difficult to work. There was also a problem that forcibly applying force to destroy the pipe structure.

Therefore, a technical problem of the present invention is to make it possible to restore a pipe crimped by using a crimping machine extremely easily and without any trouble using the same crimping machine.

[Means for Solving the Problems] Means taken in the present invention to solve the above technical problems are as follows.

A crimping machine for crimping a plastic pipe between a press blade attached to an operation rod and a frame,

(1) A restoring pressing die and a restoring receiving die, each of which has a restoring groove having a substantially semicircular arc-shaped cross section on the opposing pressing surfaces, are configured to be freely attachable to the pressing blade and the frame. At the center of each of these restoration grooves, an engagement groove that engages both ends of the crimped plastic pipe shall be provided. (Claim 1)

(2) Recessed grooves are formed on the upper surface of the restoring pressing die and on the lower surface of the restoring receiving die, into which the pressing blade and the frame are fitted, respectively. Each of the dies described above is attached to the press blade and the frame by screwing and fitting. (Claim 2)

[0010] Here, the operating rod means a rod which is lowered by hydraulic pressure, compressed air, or lever operation by human power, and presses the pressing blade against the plastic pipe.

According to the means of claim 1 described in the above (1), a pressing die for restoring and a receiving die are attached to the pressing blade and the frame attached to the operating rod, respectively, and both the returning die and the receiving die are mounted. By lowering the pressing die with the pipe crimping part interposed between the base grooves, the pipe crimping part crushed between the pressing blade and the frame is returned to the original shape (circular). In addition to this, the pipe can be restored by engaging both ends of the pipe press-fitted part which is crimped in a substantially flat shape with the engagement grooves formed in the restoration grooves of each die. The plastic pipe does not rotate and the pressing force of each die against the pipe crimping part does not come off, and it is possible to reliably carry out the restoration work in a stable state.

According to the means according to claim 2 described in the above (2), the pressing die for restoration and the receiving die can be easily attached to and detached from the pressing blade and the frame with one touch. Switching between the reversing machine is performed very smoothly, and the work efficiency on site can be improved.

As described above, the technical problems described above can be solved by the means (1) and (2), and the problems of the conventional technology can be solved.

[0014]

[Embodiment of the invention]

 An embodiment of a pipe crimping and restoring apparatus according to the present invention will be described below in detail with reference to the accompanying drawings. FIGS. 1 and 2 show the overall configuration of a conventionally used pipe crimping machine, FIG. 2 is a partial cross-sectional side view showing the configuration of the main part of the crimping device, in which the reference numeral 1 generally designates the main part of the crimping device main body formed in a substantially U-shape. Frames 2 and 3 are upper and lower arms opposed to each other above and below the frame 1, 4 is a hydraulic or compressed air cylinder mounted on the upper arm 2, and 5 is a pump. A connection port 6 for connecting a high pressure hose (both not shown) on the side is a piston rod 6 housed in the cylinder 4, and its tip 6 a protrudes toward the lower arm 3. .

Next, reference numeral 7 denotes a pressing blade which can be replaced and attached to the distal end portion 6a of the piston rod 6. The pressing blade 7 is used to fit the distal end portion 6a of the rod. A hole 7T and a bearing locking member 8 for locking the rod tip 6a fitted in the hole 7T are provided, and a guide 1a vertically provided on the inner edge of the main frame 1 is provided on the back surface thereof. A guide groove 7b to be fitted is recessed.

Reference numeral 9 denotes a regulation piece for determining the position of the plastic pipe P placed on the lower arm 3 and is made of, for example, hard rubber or spring steel.

FIG. 2 shows a state in which the plastic pipe P is crimped using the above-mentioned pressing blade 7. By sending hydraulic pressure or compressed air to the cylinder 4 to lower the pressing blade 7, The pipe P is pressed in a substantially flat shape as indicated by the symbol Pa between the pressure ridge 7a formed on the bottom surface of the press blade 7 and the pressure ridge 3a formed on the upper surface of the lower arm 3. In the drawing, T is a dead line interval set in advance so as not to break the structure of the plastic pipe P during the above-mentioned crimping, and the pressing blade 7 is structured so as not to descend below this point. ing.

The above-mentioned interval T is determined by the thickness of the plastic pipe P to be crimped, and the crimping machine used in the present invention determines this point by the vertical dimension width of the pressing blade attached to the rod tip 6a. When the thicker plastic pipe P shown in FIGS. 1 and 2 is to be crimped, the other pressing blade having a narrow vertical dimension is replaced with the pressing blade 7 which is currently in use. On the other hand, when a plastic pipe P having a smaller thickness than the one shown in the drawing is crimped, a push blade having a wider vertical dimension than the push blade 7 currently in use is used. Is used instead.

Incidentally, the above-mentioned interval T is obtained by (the thickness of the pipe × 2 × 70%). For example, in the case of a pipe having a thickness of 5.5 mm, the T interval is 5.5 × 2 × 70% = 7.7 mm.

Next, FIGS. 3 and 4 show a restoring device for restoring the crimped portion Pa of the plastic pipe P crimped by the press blade 7 to the original shape (circle). In the drawing, reference numeral 10 denotes a restoring pressing die to be attached to the above-mentioned pressing blade 7, and 11 denotes a restoring receiving die to be attached to the lower arm 3 in opposition to the die 10, and these dies 10, 11 The opposite surfaces are respectively provided with restoration grooves 10Y and 11Y each having a semicircular cross section, and by the pressing action of the restoration grooves 10Y and 11Y, crimping of a pipe crimped as shown in FIGS. The portion Pa can be restored to a circular pipe shape as shown in FIG.

As shown in the front view of FIG. 5A, the cross-sectional view taken along the line XX of FIG. 5B, and the plan view of FIG. A fitting groove 10 </ b> X into which the blade 7 is fitted is recessed downward, and a screw hole 10 </ b> Z for a tightening screw 10 </ b> H (see FIGS. 3 and 4) and a bearing locking member 8 described above are provided on both left and right sides. A notch groove 10b to be fitted is formed, and an engaging groove 10a for engaging an upper end edge of the pipe crimping portion Pa is formed in an upwardly recessed portion on the central ceiling surface of the above-described restoration groove 10Y. The central portion 10a1 has a configuration penetrating the fitting groove 10X.

On the other hand, as shown in the front view of FIG. 6A, the sectional view taken along line YY of FIG. 6B, and the plan view of FIG. A fitting groove 11X into which the arm 3 is fitted is recessed upward, and a screw hole 11Z for a tightening screw 11H (see FIGS. 3 and 4) and a cutout groove 11b are formed on both left and right sides thereof. At the center of the bottom surface of the above-mentioned restoration groove 11Y, an engagement groove 11a for engaging the lower end edge of the pipe crimping portion Pa is recessed downward, and the center portion 11a1 is placed on the side of the fitting groove 11X. It has a penetrating configuration, and its structure is made in the same shape as the above-mentioned pressing die 10. Therefore, the pressing die 10 and the receiving die 11 are interchangeable, and the pressing blade 7 and the lower arm 3 The mechanism can be used by attaching to any of them.

Since the pipe crimping restoring device according to the present invention has the above-described configuration, when crimping the plastic pipe P, a pressing blade 7 having a size corresponding to the wall thickness of the pipe is selected to select the tip of the rod. After the plastic pipe P is mounted on the lower arm 3 as shown in FIG. 1 in a state where the plastic pipe P is positioned by the regulating piece 9, the rod is supplied by hydraulic pressure or compressed air or lever operation or the like. When the push blade 7 is depressed by moving the lower part 6, the plastic pipe P is crushed between the push blade 7 and the lower arm 3 to form a crimping part Pa as shown in FIG. The water flow can be blocked to prevent leakage.

On the other hand, when the plastic pipe P crimped as described above is restored, dies 10 and 11 for restoring are attached to the press blade 7 and the lower arm 3, respectively, and the crimped portion Pa is attached as shown in FIG. After being placed between the restoring grooves 10Y and 11Y of both dies 10, 11 in the upright state, with the upper and lower end edges engaged with the upper and lower engaging grooves 10a and 11a, respectively, When the die 10 is lowered, the crimped portion Pa can be restored to a circular shape as shown in FIG. 4 between the restoration grooves 10Y and 11Y of both the dies 10 and 11.

Further, at the time of this restoration, since both ends of the crimping portion Pa are pressed while being engaged with the respective engagement grooves 11a, 11a, the restoration operation can be smoothly performed without rotating the plastic pipe P, and , Can proceed exactly.

[0026]

[Effect of the invention]

 As described above, according to the pipe crimp restoring device according to the present invention, the crimped plastic pipe can be restored by attaching the restoring dies to the pressing blade and the frame, respectively. However, at the time of restoration, it is possible to surely restore the crimped portion to a circular shape without rotating the plastic pipe by pressurizing, so that each operation of crimping and restoring the plastic pipe can be efficiently and smoothly performed. It is economical and can be provided at a low price as a device. For example, it is made of vinyl chloride or polyethylene used as a flow channel for various fluids such as water, gas, or fuel. It is suitable for temporary fixing and restoration of plastic pipes made of steel.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view showing a state in which a pipe crimp restoring device according to the present invention is used as a crimping machine.

FIG. 2 is a partial cross-sectional side view of a main part showing a state where a plastic pipe is crimped.

FIG. 3 is a partial cross-sectional side view showing a state in which the pipe crimp restoring device according to the present invention is used as a restoring machine.

FIG. 4 is a partial cross-sectional side view of a main part showing a state where a crimped portion of the plastic pipe is restored to a circular shape.

5A and 5B show the configuration of the pressing die used in the present invention, wherein FIG. 5A is a front view, FIG. 5B is a cross-sectional view taken along line XX of FIG. 5A, and FIG. FIG.

FIGS. 6A and 6B show a configuration of a receiving die used in the present invention, wherein FIG. 6A is a front view, FIG. 6B is a cross-sectional view taken along line Y-Y of FIG. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main frame of crimping machine main body 3 Lower arm 6 Piston rod 7 Pressing blade 10 Pushing die for restoration 10Y Restoration groove 10a Engagement groove 10X Insertion groove 10H Tightening screw 11 Restoration receiving die 11Y Restoration groove 11a Engagement groove 11X Fitting groove 11H Tightening screw P Plastic pipe Pa Crimping part

Claims (2)

[Utility model registration claims] 1. A crimping device for crimping a plastic pipe between a pressing blade attached to an operation rod and a frame, wherein the pressing blade and the frame have substantially semicircular arc-shaped cross sections on opposing pressing surfaces. A restoring press die and a restoring receiving die having a restoring groove formed therein are configured to be freely attachable, and an engaging groove for engaging both edges of the crimped plastic pipe is formed in a central portion of each of the restoring grooves. A pipe crimp restoring device characterized by being provided. 2. A fitting groove for fitting a pressing blade and a frame is formed on an upper surface side of a restoring pressing die and a lower surface side of a restoring receiving die, and the pressing blade and the frame are respectively fitted into these fitting grooves. The pipe crimping and restoring apparatus according to claim 1, wherein each of the dies is attached to the press blade and the frame by being fitted and screwed.