JP5553678B2 - Manufacturing apparatus and manufacturing method for cylindrical body with stopper - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a manufacturing apparatus and a manufacturing method for a cylindrical body with a stopper used for an attachment plate mounting bracket for attaching an attachment plate to a steel column bracket, beam or the like used in the construction of a construction steel frame.

  Referring to FIG. 14, a part of the construction of a construction steel frame site is shown as a perspective view. In the figure, reference numeral 10 indicates a steel column, reference numeral 11 indicates a bracket welded to the steel column 10, and reference numeral 12 indicates a beam to be connected to the bracket 11. Reference numerals 13a and 13b indicate webs of the bracket 11 and the beam 12, respectively, and reference numerals 15a and 15b indicate upper and lower flanges of the bracket 11 and the beam 12, respectively.

  Reference numerals 14a, 14b, and 14c denote a pair of attachment plates temporarily fixed to one end of the beam by bolts, and the beam 12 is connected and fixed to the bracket by these attachment plates. The pair of attachment plates 14a are temporarily fixed by bolts at the temporary attachment positions on both sides of the web end of the beam 12, but only one of them can be seen in FIG. The pair of attachment plates 14b are temporarily fixed to the upper and lower flanges 15b of the beam 12 by bolts, but the upper attachment plate 14b is temporarily fixed at the original mounting position, and the lower attachment plate 14b is It is temporarily fixed at the temporary mounting position. The pair of attachment plates 14c are temporarily fixed to the opposed inner wall surfaces of the upper and lower flanges 15b of the beam 12 by bolts at temporary mounting positions. Although not visible in FIG. 14, a pair of attachments similar to the pair of attachment plates 14 c are also temporarily fixed to the opposing inner wall surface on the opposite side of the upper and lower flanges 15 b.

  The steel column 10, the bracket 11 and the beam 12 are manufactured at the factory, and the bracket 11 is welded to the steel column 10 and the brackets 11 are temporarily fixed to the attachment plates 14a, 14b and 14c.

  As shown in FIG. 14, after the steel column 10 transported from the factory is erected at a predetermined position on the site, the beam 12 is lifted by a crane (not shown), and one end of the beam 12 is brought close to the bracket 11. .

  Next, as shown in FIG. 15, one end of the beam 12 is abutted against the end of the bracket 11, and the pair of temporarily attached attachment plates 14 a is temporarily removed, and the web 13 a of both the bracket 11 and the beam 12 After being applied to both sides of the butted portion 13b, it is fixed at the original mounting position by a bolt. Subsequently, the upper contact plate 14b is fixed to both the upper flanges 15a and 15b of the bracket 11 and the beam 12 with bolts. On the other hand, the temporarily attached lower attachment plate 14b is once removed and applied to the butted portions of the lower flanges 15a and 15b of both the bracket 11 and the beam 12, and then fixed in place with bolts. It is done.

  Next, as shown in FIG. 16, after the temporarily attached attachment plate 14 c is once removed and applied to the opposing inner wall surfaces of the butted portions of the upper and lower flanges 15 a and 15 b of both the bracket 11 and the beam 12. It is fixed at the original mounting position with bolts. A pair of attachment plates similar to the pair of attachment plates 14c is also fixed in the same manner on the opposite inner wall surface side opposite to the upper and lower flanges 15b.

  Conventionally, in order to apply the attachment plate 14a to the abutting portions of the web 11a and 13b of the bracket 11 and the beam 12 from both sides, first, an operator needs to remove the bolt of the attachment plate 14a that is temporarily fixed. In order to fix the attachment plate 14a to the webs 13a and 13b, the operator moves the attachment plate 14a to the original mounting position and sets the position of the bolt insertion hole on the web 13a and 13b side. It is necessary to insert the bolt after alignment with the bolt insertion hole.

  However, the attachment plate 14a is relatively heavy, and its weight may be 25 kg or more, and there is a risk in the operation of removing, moving, and attaching the heavy attachment plate 14a at a high place. It is a problem. The same applies to the other attachment plates 14b and 14c.

  Therefore, as shown in FIG. 17, it has been proposed that the attachment plate 14 a is attached in advance to each side wall of the web 13 a of the bracket 11 by a pair of attachment plate mounting brackets 16. Each attachment plate mounting bracket 16 includes a pair of arm members and bolts for pivotally attaching the pair of arm members to each other, and the pair of arm members are welded to the web 13a and the attachment plate 14a, respectively.

  With such a configuration, the attachment plate 14a is rotatable between the original attachment position shown in FIG. 17 and the storage position rotated to the right side of the pair of attachment plate attachment brackets 16 in FIG. The Welding of the attachment plate mounting bracket 16 to the web 13a and the attachment plate 14a is performed at the factory, and at this time, the attachment plate 14a is positioned at the storage position. When the attachment plate 14a is fixed to the web 13a of the bracket 11 and the web 13b of the beam 12 with bolts in the construction of the building steel frame, the attachment plate 14a is moved from the storage position to the original attachment position (FIG. 17). After being rotated, fixing with a bolt is performed. For this reason, as described above, since the heavy attachment plate 14a is released from the work of removing, moving and attaching at a high place, the attachment operation of the attachment plate 14a can be performed safely. .

  In the example of FIG. 17, the attachment plate mounting bracket 16 is mounted on the web 13a side of the bracket 11, but the attachment plate mounting bracket 16 may be mounted on the web 13b side of the beam 12. The same thing as the attachment plate mounting bracket 16 can be applied to the contact plates 14b and 13c.

  However, the attachment plate mounting bracket 16 having the structure as shown in FIG. 17 has a large number of assembly steps, and there is a problem that the manufacturing cost is high. Further, the welding length of the attachment plate mounting bracket is determined to be 40 mm or more according to the Architectural Institute of Japan standard (JASS6-1996). However, in the attachment plate mounting bracket 16 configured as shown in FIG. There arises a problem that the above weld length cannot be secured. Further, in the case of the attachment plate mounting bracket 16 configured as shown in FIG. 17, there is a problem that a welding defect (undercut) is likely to occur.

Accordingly, the present applicant has provided an attachment plate mounting bracket as disclosed in Patent Document 1 in order to solve the problems of the attachment plate mounting bracket as described above.
JP-A-10-195987

  Specifically, as shown in FIG. 18, each of the attachment plate mounting brackets 1 of Patent Document 1 includes a tubular body 2 a welded to the attachment plate 14 a and a tubular shape welded to the web 13 a of the bracket 11. It comprises a body 2b and a rod-like body 3 inserted through these tubular bodies 2a and 2b. At the respective ends of each of the tubular bodies 2a and 2b, a bottom portion is provided to prevent the rod-like body 3 from falling off. That is, a lid is formed. According to such an attachment plate mounting bracket 1, in the case of the cylindrical bodies 2a and 2b, not only a sufficient welding length can be obtained, but also the occurrence of welding defects can be greatly suppressed, and the number of assembly steps can be reduced. Also, it is less than that of the attachment plate mounting bracket 16 shown in FIG.

  As disclosed in Patent Document 1, each of the cylindrical bodies 2a and 2b is closed at one end with a lid. For example, each of the cylindrical bodies 2a and 2b can be formed by subjecting the cylindrical body from one end portion of the cylindrical body. Further, as disclosed in Patent Document 1, each tubular body 2a or 2b may be formed by welding or screwing one end of a tubular material to a lid member, or tubular. It is said that a hexahedron can be press-fitted into one end of the material.

  However, although the attachment plate mounting bracket 1 of Patent Document 1 can be manufactured at a lower cost than the attachment plate mounting bracket 16 shown in FIG. 17, the manufacture of the cylindrical bodies 2a and 2b is relatively troublesome. Thus, in order to further reduce the cost of the attachment plate mounting bracket, the cost of the cylindrical body should be reduced.

Therefore, the present applicant has provided an attachment plate mounting bracket as disclosed in Patent Document 2 in order to solve the problem of the attachment plate mounting bracket of Patent Document 1.
Utility Model Registration No. 3153010

  Specifically, as shown in FIG. 19, each of the attachment plate mounting brackets 4 of Patent Document 2 includes a cylindrical body 5 a welded to the attachment plate 14 a and a cylindrical shape welded to the web 13 a of the bracket 11. A body 5b and a rod-like body 6 inserted through the tubular bodies 5a and 5b. At each end of each of the tubular bodies 5a and 5b, a nail is formed to prevent the rod-like body 6 from falling off. An element or stopper element 7 is integrally formed. The manufacture of the cylindrical bodies 5a and 5b with stoppers of the attachment plate mounting bracket 4 can be performed more easily than the manufacture of the cylindrical bodies 2a and 2b of the attachment plate mounting bracket 1 of Patent Document 1. It is.

  The objective of this invention is providing the cylindrical body manufacturing apparatus with a stopper for manufacturing the cylindrical body with a stopper which is disclosed by patent document 2 from a cylindrical raw material at low cost.

The above object is achieved by the cylindrical body manufacturing apparatus with stopper and the manufacturing method of the present invention having the following configurations (1) to (7).
(1)
To manufacture a cylindrical body with stoppers for attachment slope mounting brackets by pressing and bending at least two stopper elements spaced around one end of the steel material from a cylindrical material inward in the radial direction It is a cylindrical body manufacturing apparatus with a stopper that is a press machine,
The cylindrical material is positioned opposite to the cylindrical or annular holder positioned in a predetermined position in an upright state by positioning the inner diameter portion or the outer diameter portion thereof, and the cylindrical material disposed in the holder. And a dome-shaped cutter that is concave toward the cylindrical material, and the dome-shaped cutter is obliquely removed from the center of the cylindrical material. Extending in a curved direction and comprising a plurality of strip blades, the holder being aligned with each of the strip blades (26a) and substantially matching the lateral width of the strip blades, the stopper element A cylindrical body manufacturing apparatus with a stopper, characterized in that it has a radial groove portion that allows bending inward in the radial direction.

(2)
The cylindrical body manufacturing apparatus with a stopper according to the above (1), wherein three strip-shaped blades of the dome-shaped cutter are formed along the periphery thereof.
(3)
The cylindrical body manufacturing apparatus with a stopper according to the above (1), wherein four strip-shaped blades of the dome-shaped cutter are formed so as to be spaced along the periphery thereof.

(4)
In the cylindrical body manufacturing apparatus with a stopper according to any one of (1) to (3), the band-like blades of the dome-shaped cutter are formed at regular intervals along the periphery thereof. A cylindrical body manufacturing apparatus with a stopper.
(5)
In the cylindrical body manufacturing apparatus with a stopper according to any one of (1) to (4), a radius of curvature of the curved and extending belt-shaped blade is gradually increased obliquely outward. A cylindrical body manufacturing apparatus with a stopper.

(6)
Using the cylindrical body manufacturing apparatus with a stopper according to any one of (1) to (5), the dome-shaped cutter is relatively moved toward an end portion of the cylindrical material made of steel. A cylindrical body with a stopper is manufactured by processing the end portion of the cylindrical material with a strip blade and bending at least two stopper elements spaced around the one end portion of the cylindrical material inward in the radial direction. A manufacturing method of a cylindrical body with a stopper, characterized by:
(7)
In the method for manufacturing a cylindrical body with a stopper according to the above (6), the relative movement speed of the band-shaped blade is relatively small in the initial stage.

  According to the cylindrical body manufacturing apparatus with stopper and the manufacturing method of the present invention, a part of the peripheral wall of the end portion of the cylindrical material is simultaneously pressed out at a plurality of locations and bent radially inward to form a plurality of stoppers. Therefore, the cylindrical body with a stopper can be performed by a simple operation, and the cost is reduced.

FIG. 1 is an enlarged front view of the attachment plate mounting bracket shown in FIG. FIG. 2 is a perspective view of a cylindrical body with a stopper which is one component of the attachment plate mounting bracket shown in FIG. FIG. 3 is a plan view of the cylindrical body with a stopper in FIG. FIG. 4 is a perspective view showing a cylindrical material for manufacturing the cylindrical body with a stopper shown in FIGS. 2 and 3. FIG. 5 is a schematic side view of a digital electric servo press. FIG. 6 is a front view of an upper die used in the digital electric servo press of FIG. 7 is a partially enlarged perspective view showing the upper end side of the upper cylindrical die of FIG. FIG. 8 is a plan view of the upper and lower molds. FIG. 9 is a bottom view of the upper mold of FIG. FIG. 10 is a perspective view of the pressing die. FIG. 11 is a perspective view of the dome-shaped cutter. FIG. 12 is a perspective view showing a modification of the cylindrical body with a stopper shown in FIGS. FIG. 12 is a perspective view showing another modified example of the cylindrical body with stopper shown in FIGS. FIG. 14 is a perspective view showing a part of an on-site construction of a building steel frame. FIG. 15 is a perspective view similar to FIG. 14, and shows a state in which one end portion of the beam is abutted against the end portion of the bracket and both end portions are fixedly connected to each other by a part of the attachment plate. . FIG. 16 is a perspective view similar to FIG. 15, showing a state where one end of the beam and the end of the bracket are fixedly connected by all the attachment plates. FIG. 17 is an enlarged elevational view showing an end portion of the bracket shown in FIG. 14, and is a view showing a state in which the attachment plate is attached to the bracket web with a conventional attachment plate mounting bracket. FIG. 18 is an enlarged elevational view showing an end portion of the bracket shown in FIG. 14, and shows a state in which the attachment plate is attached to the web of the bracket with a conventional improved attachment plate fitting. FIG. 19 is an enlarged elevational view showing an end portion of the bracket shown in FIG. 14, and is a view showing a state in which the attachment plate is attached to the bracket web with a further improved attachment plate fitting.

  FIG. 1 is an enlarged view of the attachment plate mounting bracket 4 alone.

  As apparent from the description with reference to FIG. 19, the attachment plate mounting bracket 4 includes a cylindrical body 5 a welded to the attachment plate (14 a), and a cylindrical body 5 b welded to the web 13 of the bracket 11. And a rod-like body 6 inserted through the cylindrical bodies 5a and 5b, and a claw element or stopper for preventing the rod-like body 6 from falling off at one end of each of the cylindrical bodies 5a and 5b. Element 7 is integrally formed.

As shown in FIGS. 2 and 3, four stopper elements 7 are integrally formed around one end of each cylindrical body 5 a or 5 b so as to be spaced apart at equal intervals. Each stopper element 7 is obtained by bending a part of the peripheral wall on one end side of each cylindrical body 5a or 5b inwardly while cutting in the longitudinal direction.
In this example, the cylindrical body with stoppers has four stopper elements 7, but any number may be used as long as there are two or more.

The cylindrical body 5a or 5b with a stopper is manufactured by the cylindrical raw material 5 shown in FIG.
Below, the digital electric servo press machine which is an example of the cylindrical body manufacturing apparatus with a stopper which manufactures the cylindrical body 5a or 5b with a stopper using this cylindrical raw material 5 is demonstrated.

  FIG. 5 shows an example of a digital electric servo press for pressing the cylindrical material 5. In the figure, reference numeral 100 generally indicates a digital electric servo press, reference numeral 102 indicates a frame, reference numeral 103 indicates a bolster, reference numeral 104 indicates a servo motor, reference numeral 106 indicates a brake, reference numeral Reference numeral 108 denotes a pinion gear, reference numeral 110 denotes a main gear, reference numeral 112 denotes an encoder, reference numeral 114 denotes a condenser, and reference numeral 116 denotes a crank.

  FIG. 6 shows a mold 10 of the digital electric servo press machine 100. The mold 10 includes a lower lower mold 20 installed on a bolster 103, an upper mold 201 and an upper mold 22 that serve as cushions. The lower lower mold 20 includes a base 20a disposed on the bolster 103 (FIG. 5), a base 20b installed on the base 20a, and a center of a rectangular recess formed on the upper surface of the base 20b. A cylindrical die 20c that is implanted and also acts as a holder for the cylindrical material 5, a spacer 20d through which the cylindrical die 20c is slidably inserted, and a guide rod 20e that guides the spacer 20d are provided. Yes. Although not shown, a coil spring is wound around the guide rod 20e, and the spacer 20d is biased upward.

  In addition, guide pillars 20f are planted on both sides of the base 20a of the lower lower mold 20, and coil springs 20g are attached to the guide pillars 20f, respectively. The guide column 20f is for guiding the upper die 22 that cooperates with the lower lower die 20 as will be described later.

The upper and lower molds 201 can move up and down, but are usually biased upward by a spring.

  As shown in FIG. 7, in this embodiment, four radial groove portions 21 are formed at equal intervals along the periphery of the upper end portion of the cylindrical die 20c, and the arrangement interval of these radial groove portions 21 is as shown in FIG. 3 and the spacing between the four stopper elements 7 shown in FIG. 3, and the width of the radial groove 21 matches the lateral width of the stopper element 7. The outer diameter of the cylindrical die 20c is slightly smaller than the inner diameter of the cylindrical material 5 shown in FIG. 4, so that the cylindrical material 5 substantially eliminates play in the cylindrical die 20c. It can be inserted.

  The upper mold 22 that cooperates with the lower lower mold 20 includes a base 23 and a first upper mold main body 24 installed on the base 23.

  As shown in FIG. 8, guide rods 27 are implanted on both sides of the upper die body 24, and the upper and lower dies 201 have guide holes through which the guide rods 27 are slidably inserted as shown in FIG. 201 a is formed, whereby the upper and lower molds 201 are movable in the front-rear direction with respect to the first upper mold body 24. A coil spring 28 is provided between the upper mold body 24 and the upper and lower molds 201, and the upper and lower molds 201 are normally maintained at a position separated from the upper mold body 24 by a biased force. Has been. The spring force of the coil spring 28 is made smaller than the spring force of the coil spring 20g attached to the guide column 20f of the lower lower mold 20.

  As shown in FIG. 9, the pressing die 29 shown in FIG. 10 is installed in the lower center of the upper mold body 24.

  In the present embodiment, the pressing die 29 is provided with a cross-shaped cross-shaped member 30, and the bottom of the cross-shaped cross-shaped member 30 is complementary to the curved form of the four band-shaped blades 26 a of the dome-shaped cutter 26 shown in FIG. 11. Are formed on the four pressing surfaces 30a. A dome-shaped cutter 26 is fixed to the pressing surface 30a. The lateral width of each pressing surface 30a is substantially matched with the lateral width of the belt-like blade 26a.

  In the present embodiment, the dome-shaped cutter 26 has four band-shaped blades 26a extending in the radial direction from the center thereof, and the arrangement interval thereof is the same as that of the four radial grooves 21 at the upper end of the cylindrical die 20c. In addition, the lateral width of each band-shaped blade 26 a is substantially the same as the width of the radial groove 21. That is, the belt-like blade 26 a is disposed at a position aligned with the radial groove 21. The lower ends of the four belt-like blades 26a are arranged on a predetermined circumference, and the circumference is larger than the outer circumference of the tubular material 5 (FIG. 4), and thus the tubular material 5 passes through the bore in the dome-shaped cutter 26 side. When moved toward, each belt-like blade 26a is brought into contact with the outer edge of the upper end of the tubular material 5 at a position higher than the lowermost end thereof.

  As shown in FIG. 9, sleeves 31 are provided on both sides of the base 23 of the upper die 22, and these sleeves 31 are slidably inserted into the guide pillars 20f of the lower lower die 20 shown in FIG. Thus, the upper die 22 is guided by the guide pillar 20f with respect to the lower lower die 20, and is movable in the vertical direction. As shown in FIG. 8, a through-opening 201 b that has a shape opposite to the pressing die 29 and through which the pressing die 29 can be inserted is formed in the central portion of the upper and lower molds 201.

  Next, the manufacturing method which manufactures the cylindrical body 5a or 5b (FIG. 2 and FIG. 3) with a stopper from the cylindrical raw material 5 (FIG. 4) using the digital electric servo press machine 100 mentioned above is demonstrated.

  First, an assembly of the upper die 22, the upper and lower dies 201, and the lower lower die 20 is installed on the bolster 103 of the digital electric servo press machine 100, and then the cylindrical material 5 (FIG. 4) is a cylindrical die 20c (FIG. 6 and FIG. 7).

  Thereafter, the digital electric servo press 100 is started. That is, the servo motor 104 is driven, and its rotational driving force is decelerated by the pinion gear 108 and the main gear 110, and then the reduced rotational driving force is converted by the crank 116 into a pressing force that presses the upper die 22 downward. .

When the upper mold 22 is pressed downward, the upper mold 22 shown in FIG. 8 is lowered toward the upper / lower mold 201 along the guide pillar 20 while compressing the spring 28, and after contacting the upper / lower mold 201, The upper and lower molds 201 are further lowered.

  Further, the upper die 22 is further lowered along with the upper and lower dies 201, and the belt-like blade 26a of the dome-shaped cutter 26 (FIG. 10) of the pressing die 29 (FIG. 11) provided in the upper die body 24 is the cylindrical material 5 (The spacer 20d is lowered to loosen the impact at this time), and a part of the peripheral wall on the upper end side of the cylindrical material 5, that is, the part where the belt-like blade 26a acts is cut and radially inward. The four stopper elements 7 are formed simultaneously by bending. It is desirable that the lowering speed of the pressing die 29 during processing is such that the initial speed is high and the speed is gradually reduced.

  Referring to FIG. 12, there is shown a modification of the stopper-equipped tubular body 4 shown in FIGS. 2 and 3. In this modification, the stopper-equipped tubular body 4 is provided with three stopper elements 7. Yes. Such a cylindrical body with a stopper can also be manufactured by a manufacturing method similar to the manufacturing method described above. In this case, according to the form of the cylindrical body with a stopper having three stopper elements 7. Three radial grooves 21 are also formed at the upper end of the cylindrical die 20c, a dome-shaped cutter 26 having three strip blades 26a is used, and a pressing die 29 having three pressing surfaces 30a is used.

  Referring to FIG. 13, another modification of the stopper-equipped tubular body 4 shown in FIGS. 2 and 3 is shown. In this modification, the stopper-equipped tubular body 4 is provided with two stopper elements 7. It has been. Such a cylindrical body with a stopper can also be manufactured by a manufacturing method similar to the above-described manufacturing method. In this case, according to the form of the cylindrical body with a stopper having two stopper elements 7. Two cylindrical grooves 21 are formed at the upper end of the cylindrical die 20c, a dome-shaped cutter 26 having two strip blades 26a is used, and a pressing die 29 having two pressing surfaces 30a is used.

  In the above-described embodiment, the pressing die 29 is provided on the upper die main body 24 and the pressing die 29 is lowered. However, in the U state, the pressing die 29-shaped die is disposed below the groove. The cylindrical material 5 may be positioned and arranged on the annular holder, the cylindrical material 5 may be lowered together with the holder while the die is fixed, and the stopper element may be processed.

5: Tubular material 5a, 5b: Tubular body 6: Rod body 7: Stopper element 20: Lower lower mold 20a: Base 20b: Base 20c: Cylindrical die 20d: Spacer 20e: Guide bar 20f: Guide column 20g: Coil spring 21: Radial groove portion 22: Upper die 23: Base 24: Upper die body 25: Upper die 26: Domed cutter 26a: Strip blade 27: Guide rod 28: Coil spring 29: Press die 30: Cross section 10 Character-shaped member 30a: Pressing surface 31: Sleeve 100: Digital electric servo press machine 102: Frame 103: Bolster 104: Servo motor 106: Brake 108: Pinion gear 110: Main gear 112: Encoder 114: Condenser 116: Crank

Claims (7)

To manufacture a cylindrical body with stoppers for attachment plate mounting brackets by pressing and bending at least two stopper elements spaced around one end of the steel material from a cylindrical material inward in the radial direction It is a cylindrical body manufacturing apparatus with a stopper that is a press machine,
The cylindrical material is positioned opposite to the cylindrical or annular holder positioned in a predetermined position in an upright state by positioning the inner diameter portion or the outer diameter portion thereof, and the cylindrical material disposed in the holder. And a dome-shaped cutter that is concave toward the cylindrical material, and the dome-shaped cutter is obliquely removed from the center of the cylindrical material. Extending in a curved direction and comprising a plurality of strip blades, the holder being aligned with each of the strip blades (26a) and substantially matching the lateral width of the strip blades, the stopper element A cylindrical body manufacturing apparatus with a stopper, characterized in that it has a radial groove portion that allows bending inward in the radial direction.   The cylindrical body manufacturing apparatus with a stopper according to claim 1, wherein three strip-shaped blades of the dome-shaped cutter are formed along the periphery thereof.   The cylindrical body manufacturing apparatus with a stopper according to claim 1, wherein four strip-shaped blades of the dome-shaped cutter are formed along the periphery thereof.   The cylindrical body manufacturing apparatus with a stopper according to any one of claims 1 to 3, wherein the belt-like blades of the dome-shaped cutter are formed at regular intervals along the periphery thereof. A cylindrical body manufacturing apparatus.   The cylindrical body manufacturing apparatus with a stopper according to any one of claims 1 to 4, wherein a radius of curvature of the curved and extending belt-shaped blade is gradually increased toward an obliquely outward direction. A cylindrical body manufacturing apparatus with a stopper as a feature.   The tubular body manufacturing apparatus with a stopper according to any one of claims 1 to 5, wherein the dome-shaped cutter is relatively moved toward an end of a tubular material made of steel material, and the tube Manufacturing a cylindrical body with a stopper by processing the end portion of the cylindrical material with a belt-like blade and bending at least two stopper elements spaced around the one end portion of the cylindrical material inward in the radial direction. The manufacturing method of the cylindrical body with a stopper characterized by the above-mentioned. The manufacturing method of the cylindrical body with a stopper according to claim 6, wherein the relative movement speed of the band-shaped blade is relatively small in the initial stage.

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