TWI541086B - The pipe clamp of the expander is improved - Google Patents

Description

Pipe clamp improved structure of pipe expander

The invention relates to an accessory for a pipe expander, in particular to a pipe clamp structure of a pipe expander.

As shown in Fig. 10, in the pipe clamp structure of the conventional pipe expander, a body 91 is pivoted at one end with two elongated halves 92, and the two halves 92 can be opened or closed at an end away from the pivot. The body 91 forms a plurality of perforations 93 when the two halves 92 are closed. The sides of the halves 92 have a plurality of recesses 94, and the recesses 94 respectively correspond to the perforations 93. The plurality of recesses 94 extend along the half of the portion 94. The directions are arranged in a straight line, and the concave portions 94 are tapered toward the deep direction, so that the tubular body 95 to be expanded is clamped after the through holes 93 are pierced, and the body 91 is moved on the expander 96 to the corresponding mark of the through hole 93. The end of the expander 96 is screwed into the recess 94, and the taper (not shown) of the expander is aligned in the expander 96 to be clamped to the perforation. The tubular body of 93 can be expanded by the tubular body 95 by pulling the driving portion 99 on the expander 96.

The plurality of recesses 94 are conventionally known as tapered bores, and the center of the tapered bore is aligned with the axis of the bore 93 to achieve positional alignment. Although the tapered hole has the end portion of the guiding positioning rod 98 aligned in the concave portion 94, the setting of the concave portion 94 does not damage the perforation 93, and the structural strength of the half portion 92 should not be weakened, that is, if the depth is deepened, the perforation may be broken. 93, if the opening is enlarged, it will weaken The structural strength of the half portion 92, even if the recess 94 is deepened and the opening is enlarged, the length of the end portion of the positioning rod 98 in the concave portion 94 is further extended, which delays the speed of the original expansion operation, so that the market is delayed. The recess 94 is formed by a tapered hole having a slightly the same size, and the opening of the tapered hole is smaller than the width of the positioning rod 98.

Therefore, if the inexperienced user fails to align the expander 96 with the indicator 97, or if it is aligned, but the indication 97 has a significant error with the axis of the perforation 93, the end of the positioning rod 98 may be as 11 is shown outside the extent of the recess 94, causing the end of the positioning rod 98 to be forced against the side of the half 92 rather than the recess 94, in addition to causing the cone to fail to align with the body 95 in the perforation 93. In addition, the side of the half portion 92 may also be damaged by the tension of the end of the positioning rod 98.

Therefore, how to solve the problem of the pipe clamp structure of the conventional pipe expander is the main focus of the present invention.

The main object of the present invention is to solve the above problems and provide an improved pipe clamp structure of a pipe expander. By providing a concave groove in the concave portion, the end of the positioning rod can be enlarged without destroying the perforated structure and weakening the structural strength. The portion can be guided into the range of the recess, so that the positioning rod can be introduced into the recess in the case of avoiding damage to the body.

For the purpose of the foregoing, the present invention is a body in which a half-shaped half is pivotally connected at one end to be openable or closed, and the body forms a plurality of perforations for the tubular body to be expanded when the two halves are closed. Rear clamping, at least half of the side has a plurality of recesses corresponding to the respective perforations, the plurality of recesses on the side Arranging along a line along the direction in which the halves extend, the positioning rod provided beside the expander can be displaced along the axis and positioned in the recess by the end of the screw, characterized in that: The linearly arranged concave portion includes two concave portions at both ends, and inner concave portions located inside the two outer concave portions, each outer concave portion having a diagonal groove at least on a side facing the adjacent inner concave portion, each inner concave portion facing the phase The two sides of the adjacent recess have two inclined grooves, each inclined groove is inclined along the axis and has a top end on the surface of the side and a bottom end on the bottom of the concave portion, and each oblique groove has two symmetry a guiding inclined surface, the opening width of each concave portion between the top ends of the two inclined grooves is not less than the width of the positioning rod, and the maximum opening width of each inner concave portion perpendicular to the axis between the top ends of the two inclined grooves is not more than the positioning rod The width.

The above and other objects and advantages of the present invention will be readily understood from

Of course, the invention may be varied on certain components, or in the arrangement of the components, but the selected embodiments are described in detail in the specification and their construction is shown in the drawings.

(customized part)

91‧‧‧Ontology

92‧‧‧ half

93‧‧‧Perforation

94‧‧‧ recess

95‧‧‧ tube body

96‧‧‧Expander

97‧‧‧Marking

98‧‧‧ Positioning rod

99‧‧‧ Drive Department

(part of the invention)

1‧‧‧ Ontology

2‧‧‧ half

21‧‧‧Act

22‧‧‧ side

3‧‧‧Perforation

4‧‧‧ recess

41‧‧‧The outer recess

411‧‧‧ oblique ditch

412‧‧‧Top

413‧‧‧ bottom

414‧‧‧ guiding slope

42‧‧‧ Inside recess

421‧‧‧ oblique ditch

422‧‧‧Top

423‧‧‧ bottom

424‧‧‧ guiding slope

5‧‧‧Marking

A‧‧‧ axis

B‧‧‧ axis

L1‧‧‧ opening width

L2‧‧‧ distance

L3‧‧‧ spacing

Fig. 1 is a perspective view showing a first embodiment of the present invention.

Fig. 2 is a side plan view showing the half of the first embodiment of the present invention on the side of the plurality of recesses.

Fig. 3 is a schematic cross-sectional view showing the recess of the first embodiment of the present invention placed in a conventional rod body.

Fig. 4 is a top plan view showing the recess of the first embodiment of the present invention placed in a conventional rod body.

Fig. 5 is a plan view showing a plan view of a recess corresponding to a first embodiment of the present invention.

Figure 6 is a side plan view showing the half of the second embodiment of the present invention on the side of the plurality of recesses.

Figure 7 is a partially enlarged view of a second embodiment of the present invention.

Figure 8 is a side plan view showing the half of the third embodiment of the present invention on the side of the plurality of recesses.

Figure 9 is a partially enlarged view of a third embodiment of the present invention.

Figure 10 is a schematic perspective view of the pipe clamp structure of the conventional pipe expander.

Figure 11 is a schematic cross-sectional view showing a conventional rod placed in a recess.

Referring to Figures 1 through 9, the structure of the embodiment selected for use in the present invention is for illustrative purposes only and is not limited by such structure in the patent application.

The embodiment provides a pipe clamp improved structure of the pipe expander. As shown in FIG. 1 , the body has a body 1 , and the body 1 includes two halves 2 , and each half 2 is at one end. The body 1 is pivotally connected by a ring body 21, so that the body 1 can be opened or closed by one end of the two halves 2 that are pivotally connected away from the ring body 21, and the body 1 forms a plurality of perforations 3 when the two halves 2 are closed, and the perforations 3 are available. The tube to be expanded is clamped after being worn.

As shown in Figures 1 to 2, in the present embodiment, the side 22 of the half portion 2 has a plurality of recesses 4 corresponding to the respective perforations 3, and the plurality of recesses 4 are along the side edges 22 Along with the axis A of the extending direction of the half (this axis A is a virtual line on the side 22) .

As shown in the second to third figures, the plurality of linearly arranged recesses 4 include two recesses 41 at both ends and inner recesses 42 located within the outer recesses 41. Each of the outer recesses 41 has a diagonal groove 411 on a side facing the adjacent inner concave portion 42 , and each inner concave portion 42 faces the adjacent concave portion 4 (if the inner concave portion 42 is between the two inner concave portions 42 ) The concave portion 4 refers to the inner concave portion 42. If the inner concave portion 42 is interposed between the outer concave portion 41 and the inner concave portion 42, the concave portion 4 includes both sides of the outer concave portion 41 and the inner concave portion 42) The two inclined grooves 421 are inclined along the axis A, and each of the inclined grooves 411 and 421 has a top end 412, 422 on the surface of the side 22 and a bottom at the bottom of the concave portion 4. The ends 413, 423, the bottom ends 413 of the inclined grooves 411 on both sides of the same outer concave portion 41 are adjacent to each other at the bottom of the outer concave portion 41 in the embodiment (not in different embodiments); The bottom end 423 of the inclined groove 421 on both sides of the same concave portion 42 is also adjacent to the bottom of the inner concave portion 42 in the embodiment, and is not adjacent to each other (in different embodiments, it may be connected), and each oblique The grooves 411 and 421 have two symmetrical guiding surfaces 414 and 424. The guiding surfaces 414 and 424 are all planar in this embodiment (or curved surfaces in different embodiments).

As shown in FIGS. 3 to 4, the conventional positioning rod 98 is located in an inner recess 42. The opening width of the inner recess 42 between the top ends 422 of the two oblique grooves 421 is larger than the positioning rod 98 in this embodiment. Width, and the maximum opening width of each of the inner recesses 42 perpendicular to the axis A between the top ends 422 of the two inclined grooves 421 (as shown in FIG. 4 is perpendicular to the opening width L1 at the axis B of the axis A) is in this embodiment. Medium is smaller than the width of the positioning rod 98. Such as 1st to 2nd As shown in the figure, in the two outer recesses 41 of the present embodiment, the recessed portion 41 is located on the left side of the figure, and has a slanted groove 411 on both sides of the inner recessed portion 42 facing and facing away from each other, and the recessed portion 41 is also As shown in FIGS. 3 to 4, the width of the opening between the top ends 412 of the two oblique grooves 411 is also larger than the width of the positioning rod 98 in the present embodiment, and the outer concave portion 41 is perpendicular to the top end 412 of the two oblique grooves 411. The maximum opening width of the axis A (like the opening width L1 at the axis B perpendicular to the axis A as shown in Fig. 4) is also smaller than the width of the positioning rod 98.

As shown in Fig. 5, the inner recessed portion 42 (or the outer recessed portion 41) corresponds to the through hole 3, and here the inner recessed portion 42 (or the outer recessed portion 41) is opposed to the axis of the through hole 3. When the body 1 is set in the expander (not shown), the relative position of the expander and the body 1 can be shifted, so that the positioning rod next to the expander is also displaced along the axis A, when the pipe is expanded. The indicator on the device (not shown) is aligned at the mark 5 of the body 1, so that the positioning rod can be rotated and the end portion thereof is placed in the corresponding inner concave portion 42 (or the outer concave portion 41) to be positioned. The cone of the pipe (not shown) is disposed in the pipe body (not shown) of the pipe to be expanded in the perforation, and is inserted into the inner recess 42 (or the outer recess 41) at the end through the screw lock. in.

From the above description, it is not difficult to find that the present invention has an advantage in that the opening width between the tips 412 and 422 of the two inclined grooves 411 and 421 of each of the concave portions 4 is not less than the inner concave portion 42 or the outer concave portion 41 (i.e., as in the above embodiment) Is greater than, or equal to) the width of the positioning rod 98, and the maximum opening width of the recess 4 perpendicular to the axis A between the tips 412, 422 of the two inclined grooves 411, 421 is not greater than (i.e., less than the above embodiment) Or equal to the width of the positioning rod 98, compared to the conventional recess 94 is a tapered hole and the opening is smaller than the positioning rod 98 In terms of the width, even if the inexperienced user fails to align the expander with the indication 5, or if it is aligned, but the indication 5 and the axis of the perforation 3 have significant errors, the recess 4 of the present invention The opening is only larger than the width of the positioning rod 98 in the direction of the axis A, so that the structural strength of the perforation 3 or the weakened half 2 is not damaged, and the end of the positioning rod 98 can be easily introduced into the recess 4, and the inclined groove 411, 421 lead to the positioning, so that the cone of the expander can be aligned with the tube body clamped in the perforation 3, and the side 22 of the half 2 can be prevented from being damaged by the tension of the end of the positioning rod. The problem.

Of course, there are many examples of the invention, with only minor variations in the details. Referring to Figures 6 to 7, a second embodiment of the present invention, wherein a top end 412 of one of the outer recesses 41 and a top end 422 of the inclined groove 421 opposite the adjacent inner recess 42 The distance L2 between the tips 412 and 422 is half of the distance L3 between the outer concave portion 41 and the bottom portion of the inner concave portion 42. The oblique groove 411 between the concave portions 4 in FIG. 6 is analogized by this relationship, thereby achieving the first implementation. The same effect.

Referring again to FIGS. 8-9, which is a third embodiment of the present invention, a top end 412 of one of the outer recesses 41 and a top end 422 of the inclined groove 421 opposite the adjacent inner recess 42 The distance between the two tips 412, 422 approaches zero, and the oblique groove 411 between the recesses 4 in Fig. 8 is analogously applied in this relationship, thereby achieving the same effect as the first embodiment.

The above description of the embodiments is intended to be illustrative of the invention and is not intended to limit the scope of the invention.

From the above detailed description, those skilled in the art will be able to understand the present invention. It is indeed possible to achieve the aforementioned objectives, and it has already met the requirements of the Patent Law and has filed a patent application.

1‧‧‧ Ontology

2‧‧‧ half

21‧‧‧Act

22‧‧‧ side

3‧‧‧Perforation

4‧‧‧ recess

41‧‧‧The outer recess

42‧‧‧ Inside recess

5‧‧‧Marking

Claims (8)

A tube clamp improved structure of a pipe expander, wherein a body is pivotally connected at one end by a half of the elongated body to be openable or closed, and the body forms a plurality of perforations for the tube to be expanded when the two halves are closed After the body is pierced, at least half of the side has a plurality of recesses corresponding to the respective perforations, and the plurality of recesses are linearly arranged on the side of the side line along an axis extending in the direction of the half, and the raft is provided for the expansion The positioning rod next to the device is displaceable along the axis and is positioned in the recess by the screw lock, wherein the plurality of linearly arranged recesses include two recesses at both ends and two recesses. The inner concave portion has a diagonal groove at least on a side facing the adjacent inner concave portion, and each inner concave portion has two oblique grooves on opposite sides of the adjacent concave portion, and each inclined groove is inclined along the axis And having a top end of the surface of the side and a bottom end of the bottom of the recess, and each of the inclined grooves has two symmetrical guiding slopes, and the width of the opening of each concave portion between the top ends of the two inclined grooves is not less than The width of the positioning rod, and each concave portion is Between the top of the angled trench vertical maximum opening width of not greater than the width of the axis of the positioning rod. The pipe clamp improving structure of the expander according to claim 1, wherein an opening width of each of the inner concave portions between the top ends of the two inclined grooves is larger than a width of the positioning rod, and each inner concave portion is at the second inclined groove The maximum opening width of the axis perpendicular to the top end is smaller than the width of the positioning rod. The pipe clamp improvement structure of the expander according to claim 2, wherein a top end of one of the concave grooves is a top end of the inclined groove opposite to the adjacent concave portion, and a distance between the top ends is The bottom of the recess Half to the distance that is close to zero. The tube clamp improvement structure of the expander according to claim 3, wherein the distance between the top ends is further half of the bottom pitch of the two recesses. The pipe clamp improvement structure of the expander according to claim 1, wherein the outer concave portion has a slant groove on both sides facing and adjacent to the adjacent inner concave portion, and the concave portion is between the top ends of the two inclined grooves The opening width is not less than the width of the positioning rod, and the maximum opening width of the outer concave portion perpendicular to the axis between the top ends of the two oblique grooves is not more than the width of the positioning rod. The tube clamp improvement structure of the expander according to claim 1, wherein the guide slope is one of a plane or a curved surface. The tube clamp improvement structure of the expander according to claim 1, wherein the bottom ends of the inclined grooves on both sides of the same inner concave portion are adjacent to each other at the bottom of the inner concave portion. The tube clamp improvement structure of the expander according to claim 1, wherein the bottom ends of the inclined grooves on both sides of the same inner concave portion meet at the bottom of the inner concave portion.