Source: http://www.google.com/patents/US6711803?dq=6,821,337
Timestamp: 2017-01-23 04:35:58
Document Index: 704815322

Matched Legal Cases: ['art 25', 'art 25', 'art 25', 'arts 43', 'arts 43', 'arts 48', 'art 48', 'art 25', 'arts 48', 'arts 48', 'arts 48', 'arts 52', 'arts 60', 'arts 52', 'arts 60', 'art 4']

Patent US6711803 - Method of joining steel products, method of processing junction surfaces of ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsThe present invention enables to firmly assemble a steel-frame structure. To form a steel-frame structure or to join two steel members being reinforcing members thereof, a slip-proof surface having one or plural concentric higher parts and grooves is formed on the joined surface of one side or both sides...http://www.google.com/patents/US6711803?utm_source=gb-gplus-sharePatent US6711803 - Method of joining steel products, method of processing junction surfaces of steel products, and reinforcing memberAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS6711803 B1Publication typeGrantApplication numberUS 09/622,884PCT numberPCT/JP1999/007136Publication dateMar 30, 2004Filing dateDec 20, 1999Priority dateDec 25, 1998Fee statusPaidAlso published asCA2320380A1, CN1151332C, CN1291929A, EP1136173A1, EP1136173A4, WO2000038878A1Publication number09622884, 622884, PCT/1999/7136, PCT/JP/1999/007136, PCT/JP/1999/07136, PCT/JP/99/007136, PCT/JP/99/07136, PCT/JP1999/007136, PCT/JP1999/07136, PCT/JP1999007136, PCT/JP199907136, PCT/JP99/007136, PCT/JP99/07136, PCT/JP99007136, PCT/JP9907136, US 6711803 B1, US 6711803B1, US-B1-6711803, US6711803 B1, US6711803B1InventorsKiyokazu KobayashiOriginal AssigneeTakashima CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (44), Referenced by (1), Classifications (40), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetMethod of joining steel products, method of processing junction surfaces of steel products, and reinforcing member
According to the present invention, a slip-proof surface which has one or plural recessed and projected parts around a connecting hole of steel members is formed on the joined surface of steel members on a conical incline by form-rolling the joined surface of the steel members by prescribed constant pressure obtained by pressure setting means by means of rolling dies forming a rolling edge that has one or plural concentric higher parts. Therefore, a joined surface having a slip-proof surface in which a difference by “misshaping” to each part of the concentric recessed and projected parts is small can be accomplished.
Referring to FIGS. 5 and 6, 11 generally shows a joined surface processing apparatus. A steel member 12 which is conveyed by an automatic conveyer line in a steel member processing factory is fed onto a working table 18 on a workbench 17 in the feeding direction shown by an arrow “a” by a feed roller 15 driven by an electric motor for working automatic line 14 and driven rollers 16 that are provided on an introducing bench 13, along guide members 13A.
Thus processed steel member 12 is sent out by a sending roller 32 driven by a motor 31 and driven rollers 33 that are provided on a discharging bench 30 in the sending direction shown by an arrow “b” along guide members 30A.
The processing mechanism part 25 is mounted on position adjusting rails 35. Thus, the processing mechanism part 25 generally adjusts the position of the spindle device 26, i.e., the tool 27, in the feeding and sending direction of the steel member 12 (this is referred to as “x” direction), and adjusts the position of the spindle device 26 in the direction that is orthogonally crossing the feeding and sending direction of the steel member 12 (this is referred to as “y” direction) by a position adjusting mechanism 36.
Since the processing mechanism part 25 adjusts the position of the tool 27 in the “x” direction and the “y” direction when the steel member 12 being the object of joined surface processing is positioned on the working table 18, the position of the tool 27 is adjusted to the central position of a bolt hole 21 that has been previously drilled in the steel member 12.
The tool supporting member 43 has a U-shaped section. A rolling die holder 44 is disposed between a pair of supporting plate parts 43A and 43B that are mutually opposite at the longitudinal positions and are extending downward. And the rolling die holder 44 is axially supported freely rotatably in a direction shown by an arrow “d” to rotary supporting shafts 45A and 45B that are provided to protrude inward in the longitudinal direction at the top ends of the supporting plate parts 43A and 43B respectively.
In this connection, in form rolling operation, for example, several tons of pressing force is given to the thrust ball bearings 50A, however, as a condition to stably receive such large pressing force by the contacted surface to the conical incline 48A of the steel member 12, preferably the attaching angle θ is selected to θ≈40°.
In the case of this embodiment, the rolling edge 48B has four higher parts in an isosceles triangle and one higher part in a half of isosceles triangle: it is formed by edge parts 48C having such higher part, and as shown in FIG. 10(A), an apex angle a of the higher part of each edge part 48C is selected to α=60° to 170°.
According to the test, as shown in FIGS. 10(B) and 10(C), if the apex angle α is selected to 60° to 170°, recessed and projected parts having a practically sufficiently large intensity can be formed on the surface of the steel member 12 as a slip-proof surface 52. On the contrary, if the apex angle α is selected to 60° or less, the intensity of the recessed and projected parts shows a tendency to lower, and if it is selected to 170° or more, a tendency to increase the difficulty of the processing work of a slip-proof surface 52 is shown.
In the above structure, if the steel member 12 is fed from the introducing bench 13 onto the workbench 17 and the processing reference position PO1 of the bolt hole 21 that becomes a connecting hole in the steel member 12 is located at the position where coincides with the working reference position PO2 on the working table 18, the spindle device 26 of the processing mechanism part 25 performs position adjusting operation to the tool 27 in the “x” and the “y” directions. Thus, the rotational center axis PO3 coincides with the processing reference position PO1 of the bolt hole 21.
In this manner, since the diameter of the higher parts of the edge parts 48C on the conical incline 48A becomes larger from inside to outside, when the tool 27 makes one revolution centering the rotational center axis PO3, a difference by “misshaping” that is given by the inside and the outside edge parts 48C on the slip-proof surface 52 can make to be practically sufficiently small, and thus, plastic working can be performed on the concentric recessed and projected parts on the slip-proof surface 52 with even accuracy and large intensity.
For instance, if plural edge parts 48C are formed on the cylindrical surface of a cylindrical die head in place of the conical incline 48A to form plural concentric recessed and projected parts, the recessed and projected parts are cut by the edge parts that have same radius of curvature: in the above-mentioned case, the radius of curvature of the inside and the outside concentric recessed and projected parts is mutually different. Therefore, a difference by “misshaping” by the corresponding edge parts to the inside and the outside concentric recessed and projected parts becomes large.
According to the aforementioned embodiment, by applying the conical incline 48A, the change of the radius of curvature of the edge parts aligned from inside to outside can be adopted to the change of the radius of curvature of the corresponding concentric recessed and projected parts. Thus, a difference by “misshaping” by the inside and the outside edge parts can make to be small.
This force to prevent face shifting functions in the all directions of the width direction from the bolt holes 58A or 58B since the slip-proof surfaces 52 and 52X are formed by the concentric recessed and projected parts having the higher parts 52A and the grooves 52B. Accordingly, in the frame structure of FIG. 19, also in the case where a force to shift in the horizontal direction functions to the frame structure as shown by an arrow “e” and the case where a vertical force functions to the frame structure as shown by an arrow “f”, the motion that the two pieces of steel plates shift can be prevented owing to the slip-proof surfaces 52 and 52X that are engaged as mutually-fitting by the in-raw system.
In this state, if the rod parts 60A and 60B are pulled in the directions shown by arrows “g” (FIG. 21(B)), the higher parts 52A and the grooves 52B of the slip-proof surfaces 52 and 52X are mutually engaged, and face shifting of the plate parts 60C and 60D to the washers 60E and 60F can be prevented. Thus, fear of shearing of the bolts 60G and 60I can be further reduced.
(7-3) In the aforementioned embodiment, it has dealt with the case where the attaching angle θ of the rolling die 46L(46R) (FIG. 8) is set to θ=40° as a suitable condition when a ball bearing is used. However, the attaching angle θ is not only limited to this but also various angles can be selected.
In this connection, when the attaching angle θ is θ=40°, form rolling processing with less “misshaping” can be practically performed with respect to the entire conical inclines 48A and 48B. On the other hand, if it becomes θ≈0°, “misshaping” at an external diameter part tends to become large. If θ becomes larger than 45°, the breadth of the joined surface processing tool 27 can be reduced.
Referring to FIGS. 33(A) to 33(C) and 34(B) that correspond to FIGS. 32(A) to 32(C) and 34(A), as shown by adding an additional letter “X” to the reference numerals of corresponding parts, the brace plate 83 will be subjected to form rolling processing by the rolling tool TO2 similarly to the processing on the brace sheet 84 except that rolling edges 90X in rolling dies 87LX and 87RX are different from 90 in shape.
According to the above configuration, in the state where the strut reinforcing members 80 have been fixed to the frame structure part 4, if an earthquake occurs and cross beam steel members 2A and 2B and vertical steel members 3 is about to do vibrating motion such as distort, the tension members 81 are strained in the extended direction as shown by arrows “g” in FIG. 28.
At this time, since the brace plate 83 has been joined to the brace sheet 84 by the bolt 85 and the slip-proof surface 83A formed around the bolt hole 83B, if the tensile directions “g” are shifted, it turns in the direction along the concentrical recessed and projected parts being the slip-proof surface so as to suit the force in that direction. And at the same time, the brace sheet 84 and the brace plate 83 are held not to mutually slip to the tensile force by bite of the slip-proof surface 84B on the brace sheet 84 and the slip-proof surface 83C on the brace plate 83.
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