JP6124179B2 - Stud mounting structure and mounting method - Google Patents

Description

  The present invention relates to a stud mounting structure and a mounting method for standing studs such as stud gibbles on a thin metal plate constituting a deck plate or the like.

  A deck plate made of a thin metal plate is widely used as a flooring material that also serves as a formwork for placing concrete slabs.

  Since this deck plate may cause damage to the slab if it deviates from the concrete part, as shown in FIG. In some cases, the adhesion strength between the deck plate made of the thin metal plate 1 and the concrete is secured via the stud gibber 2.

  This stud gibber 2 has a constant outer diameter in order to ensure the adhesion strength with concrete, and conventionally, as a method of standing the stud 2 having such a constant outer diameter integrally with the thin metal plate 1. A method is known in which the lower end of the stud 2 is welded to the surface of the thin metal plate 1 by arc-type stud welding or the like (see, for example, Patent Document 1). In the figure, reference numeral 3 denotes a weld metal part.

JP 7-323373 A

  However, in the conventional technology as described above, the relationship between the stud diameter and the thickness of the base metal is greatly related to the influence on the base material due to the heat of fusion during welding, and a stud having a constant outer diameter is made into a thin metal plate. When stud welding is performed, there is a problem that the back of the thin metal plate is burnt due to the heat of melting, or the paint on the back of the metal plate is peeled off. When burn marks occur on the back surface of the metal plate, it is necessary to repaint the back surface of the metal plate, resulting in a problem that work efficiency is poor.

  Further, after installing a deck plate made of a thin metal plate, a stud is attached to the thin metal plate, and the back surface of the thin metal plate is such that a deck plate made of a thin metal plate is installed at a high place. Is very difficult, there is a problem that repainting is not possible even if the coating on the back of the thin metal plate is peeled off due to the heat of fusion during stud welding.

  Further, if the thickness of the thin metal plate is not sufficient with respect to the stud diameter, the thin metal plate as the base material may be damaged by the heat of fusion.

  Therefore, in view of such a conventional problem, the present invention has an object of providing a stud mounting structure and a mounting method capable of standing up a large-diameter stud efficiently on a thin metal plate with little influence on the thin metal plate. It was made as.

The feature of the invention described in claim 1 for solving the above-described conventional problem is that the stud mounting structure for standing the stud on the surface portion of the thin metal plate is superimposed on the thin metal plate. A stud standing body in which the stud is erected integrally on a flat base plate , and a diameter of eight times or less the plate thickness of the thin metal plate, which is erected by welding on the thin metal plate A plurality of small-diameter studs, and a plurality of insertion holes through which the small-diameter studs are respectively inserted into the pedestal plate, and the small-diameter studs inserted through the insertion holes are fixed to the pedestal plate surface portion by fixing means. And the stud standing structure is fixed to the thin metal plate.

  According to a second aspect of the present invention, in addition to the configuration of the first aspect, each of the small diameter studs is erected on the thin metal plate by CD type stud welding.

  According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, the small-diameter stud has a threaded portion on the outer periphery and uses a nut as a fixing means.

According to a fourth aspect of the present invention, in the stud mounting method in which the stud is erected on the surface portion of the thin metal plate , the stud is integrally erected on a flat base plate having a plurality of insertion holes. A stud standing body is manufactured in advance , and a plurality of small-diameter studs having a diameter of 8 times or less the plate thickness of the thin metal plate are installed by welding on the thin metal plate, and then the base plate is attached to the thin wall The stud standing body is placed on the thin metal plate so that the small-diameter stud is inserted through the insertion holes, and then the small-diameter stud is fixed to the surface of the base plate by fixing means. The stud is erected on the thin metal plate by fixing the stud erected body to the thin metal plate.

  According to a fifth aspect of the present invention, in addition to the configuration of the fourth aspect, the small diameter studs are erected on the thin metal plate by CD-type stud welding.

  As described above, the stud mounting structure according to the present invention is a stud mounting structure for standing a stud on a thin metal plate, and the stud is integrated with a flat pedestal plate superimposed on the thin metal plate. And a plurality of small diameter studs erected by welding on the thin metal plate, and a plurality of insertion holes through which the small diameter studs are inserted respectively. The small diameter studs inserted into the insertion holes are fixed to the surface of the base plate by fixing means, and the stud standing body is fixed to the thin metal plate so that each small diameter stud has a small diameter. Therefore, the effect on the thin metal plate during welding can be reduced, the coating on the back of the thin metal plate can be prevented from peeling off, high quality can be maintained, and repainting can be performed. Good can be work efficiency be omitted.

  In addition, the pedestal plate with the studs erected integrally makes contact with the thin metal plate at a surface larger than the cross section of the stud, and the force acting on the stud erection body is distributed to the plurality of small diameter studs. Can exhibit high bending strength and shear strength.

  In the present invention, the small-diameter studs are erected on the thin metal plate by CD-type stud welding, so that the heat of fusion during welding does not affect the back surface of the thin metal plate.

  Furthermore, in the present invention, the small-diameter stud has a threaded portion on the outer periphery, and by using a nut as the fixing means, the stud standing body can be easily attached to the thin metal plate, and the work efficiency is excellent.

  The stud mounting method according to the present invention is a stud mounting method in which a stud is erected on a thin metal plate, and the stud is erected integrally on a flat base plate having a plurality of insertion holes. The body is manufactured in advance, and a plurality of small-diameter studs are erected on the thin metal plate by welding, and then the pedestal plate is overlaid on the thin metal plate, and the small-diameter stud is inserted into each insertion hole. The stud standing body is installed on the thin metal plate as described above, and then the small diameter stud is fixed to the surface of the base plate by fixing means to fix the stud standing body to the thin metal plate. Thus, by standing the stud on the thin metal plate, the large-diameter stud is efficiently erected on the thin metal plate while suppressing the influence of stud welding on the thin metal plate. Door can be.

  In the present invention, the small diameter studs are erected on the thin metal plate by CD-type stud welding, so that the heat of fusion during welding does not affect the back surface of the thin metal plate.

It is a front view which shows an example of the attachment structure of the stud which concerns on this invention. It is a top view same as the above. It is a perspective view which shows an example of the stud standing body in FIG. (A)-(c) is a front view which shows the outline of each process of the attachment method of the stud which concerns on this invention. It is the schematic which shows an example of CD system stud welding apparatus. It is a schematic front view for demonstrating the attachment process of the small diameter stud in Fig.4 (a). It is a front view which shows an example of the attachment structure of the conventional stud.

  Next, an embodiment of the stud mounting structure according to the present invention will be described based on the embodiment shown in FIGS. In the figure, reference numeral 10 denotes a thin metal plate constituting a deck plate or the like.

  The thin metal plate 10 is formed in a thin shape with steel plates or the like whose front and back surfaces are coated, and is installed at a high place or the like according to the application.

  As shown in FIGS. 1 and 2, the stud mounting structure for erecting a stud 11 such as a stud gibber on the thin metal plate 10 is a stud standing structure in which the stud 11 is erected integrally with a base plate 12. A stud 13 is provided, and the stud 11 is erected on the thin metal plate 10 by fixing the stud standing body 13 to the thin metal plate 10 using small diameter studs 14, 14... It is like that.

  As shown in FIG. 3, the stud standing body 13 includes a flat base plate 12 and a columnar stud 11 erected integrally with the base plate 12, and the lower end of the stud 11 is an arc type, short cycle. It is firmly fixed to the surface portion of the base plate 12 by stud welding such as a method.

  The stud 11 is formed in a columnar shape having a desired outer diameter d1 with a steel material such as mild steel or stainless steel, or other metal material, and has, for example, a stud shape with a head integrally including a head portion 11a projecting outward at the upper end. (Stud gibber shape). In addition, the aspect of the stud 11 is not limited to the above-mentioned stud shape with a head, The stud bolt shape etc. which have a thread part in an outer peripheral part may be sufficient.

  The pedestal plate 12 is formed in a rectangular flat plate shape having a certain thickness with a steel plate or the like, and a plurality of insertion holes 15, 15... Penetrating in the thickness direction are formed on both sides at intervals in the longitudinal direction. Yes. The shape of the base plate 12 is not limited to a rectangular flat plate shape, and may be a circular flat plate shape, for example.

  The pedestal plate 12 is formed so as to have substantially the same thickness as the thickness t of the thin metal plate 10 or thicker than the thin metal plate 10 and to have a thickness suitable for the base material at the time of stud welding. Has been.

  In addition, the thickness suitable for the base material at the time of stud welding is determined based on various conditions such as the molten metal, the material of the stud 11 and the base plate 12, the welding method, etc., and has a thickness of 1/3 or more of the stud diameter d1. It is preferable to do.

  The insertion holes 15, 15... Are formed so that the inner diameter is substantially the same as the small diameter stud diameter d 2, and the small diameter studs 14, 14 erected integrally with the thin metal plate 10 in the respective insertion holes 15, 15. Is inserted, and the upper ends of the small-diameter studs 14, 14... Are fixed to the surface of the base plate 12 by fixing means, so that the studs stand through the small-diameter studs 14, 14. The structure 13 is fixed to the surface of the thin metal plate 10.

  Each of the small-diameter studs 14, 14... Is formed in a stud bolt shape having a male threaded portion 16 on the outer periphery with a steel material such as mild steel or stainless steel, and is formed on the surface portion of the thin metal plate 10 by CD (Capacitor Discharge) type stud welding. Standing at a predetermined position, the heat of melting by stud welding does not affect the back surface of the thin metal plate 10.

  The diameter d2 of each of the small diameter studs 14, 14... Is determined according to various conditions such as the material of the thin metal plate 10 and the small diameter studs 14, 14. The diameter is preferably smaller than the diameter d1 and not more than 8 times the plate thickness t of the thin metal plate 10, and is preferably not more than 6 times the plate thickness t of the thin metal plate 10.

  As the fixing means, a nut 17 is used, and the nut 17 is screwed into the male threaded portion 16 of the small diameter studs 14, 14... And tightened so that the small diameter studs 14, 14. It has become established.

  The fixing means is not limited to the nut 17, and, for example, the small diameter studs 14, 14... And the base plate 12 surface portion are welded, and the small diameter studs 14, 14. You may make it.

  In the mounting structure of the stud 11 configured as described above, since the small diameter studs 14, 14... Have a small diameter, it is possible to suppress the influence of the heat of fusion upon welding on the thin metal plate 10 having a small thickness. On the other hand, the stud 11 having a desired outer diameter d1 can be attached to the thin metal plate 10 having a small plate thickness via the plurality of small-diameter studs 14, 14.

  In particular, by using CD stud welding for welding the thin metal plate 10 of the small diameter studs 14, 14..., The heat of fusion during welding does not affect the back surface of the thin metal plate 10. The paint on the back side does not peel off, and repainting after welding becomes unnecessary. Therefore, the stud 11 can be suitably erected on the thin metal plate 10 already installed in a place where it is difficult to work on the back surface of the metal plate such as a high place.

  Further, the base plate 12 on which the stud 11 is erected integrally contacts the thin metal plate 10 with a surface larger than the cross section of the stud 11, and the force acting on the stud erected body 13 has a plurality of small diameter studs 14, 14..., So that the stud 11 can exhibit high bending strength and shear strength.

  Next, a stud mounting method according to the present invention will be described based on the embodiment shown in FIGS. In addition, the same code | symbol is attached | subjected and demonstrated to the structure similar to the above-mentioned Example, and the code | symbol 10 is a thin metal plate by which the front and back which comprise the deck plate etc. were painted.

  In order to attach the stud 11 to the thin metal plate 10, first, as a preliminary preparation, a stud stand in which the stud 11 is integrally erected on a flat base plate 12 having a plurality of insertion holes 15, 15. The structure 13 is manufactured in advance at a factory or the like.

  The stud standing body 13 includes a flat base plate 12 and a columnar stud 11 erected integrally with the base plate 12 as in the above-described embodiment shown in FIG. Is firmly fixed to the surface of the base plate 12 by stud welding such as arc method or short cycle method.

  Then, at the site where the stud 11 is attached, first, as shown in FIG. 4A, a plurality of small-diameter studs 14, 14... Are erected at predetermined positions on the surface portion of the thin metal plate 10.

  In order to erect each small-diameter stud 14, 14..., First, the standing position of the stud 11 on the thin metal plate 10, that is, the position of the insertion hole 15, 15. The surface of the thin metal plate 10 is removed by polishing or the like in accordance with the position, the background of the thin metal plate 10 at the position where the small diameter studs 14, 14. The lower ends of the small-diameter studs 14, 14 ... are fixed to the part by CD stud welding.

  CD-type stud welding uses a welding apparatus as shown in FIG. 5, and as shown in FIG. 6, the charge charged in the large-capacity capacitor is converted into small-diameter studs 14, 14... And thin metal plate 10 (base material). .. Are welded to the thin metal plate 10 by instantaneously discharging between them. In the figure, reference numeral 20 denotes a welding machine, reference numeral 21 denotes a welding gun, and reference numeral 22 denotes a ground connection cable.

  CD method stud welding can be broadly classified into contact method and gap method, and either method may be adopted in the present invention.

  In the contact method, small diameter studs 14, 14... Having a projection 23 called a navel on the lower end surface are set on the welding gun 21, and the welding gun 21 is pressed against the base material 10, so that the tip of the projection 23 is moved. When the welding gun 21 is operated in contact with the base material and the electric charge stored in the capacitor is concentrated and flowed to the protrusion 23 at the tip, the protrusion 23 instantaneously melts and evaporates, and the small diameter stud 14, 14. The arc spreads on the lower surface, and at the same time, the stud 11 is pressed against the base material 10 by the spring inside the welding gun 21 and welded.

  On the other hand, the gap method operates with the small-diameter studs 14, 14... Being set on the welding gun 21 in a state where an appropriate amount is separated from the base material by the solenoid coil and pressing the welding gun 21 against the base material. Then, the excitation of the solenoid coil is cut off, and the small diameter studs 14, 14... Move toward the base material, and at the moment when the small diameter studs 14, 14. It flows so as to concentrate on the projection 23 at the lower end.

  After the welding of the small-diameter studs 14, 14... Is completed, the portion around the small-diameter studs 14, 14. Is completed.

  In addition, by welding the small diameter studs 14, 14... By CD method stud welding, the heat of fusion during welding does not affect the back surface of the thin metal plate 10, and thus the coating on the back surface is not peeled off. There is no need to repaint the back surface of the thin metal plate 10.

  Next, as shown in FIG. 4B, the stud standing body 13 is installed in accordance with the positions of the small-diameter studs 14, 14... And the base plate 12 is overlaid on the thin metal plate 10, and each insertion is made. The small diameter studs 14, 14 ... are inserted into the holes 15, 15 ....

  .. Are fixed to the surface portion of the base plate 12 by fixing means, that is, the nut 17 is fastened to the male thread portion 16 of the small diameter studs 14, 14. Fix to the thin metal plate 10. As a result, the stud 11 is erected on the thin metal plate 10 as shown in FIG.

  In the above-described embodiment, the example in which the small-diameter studs 14, 14... Are integrally installed on the thin metal plate 10 by CD-type stud welding has been described, but the thickness t of the thin metal plate 10, the small-diameter stud diameter. d2, in consideration of various conditions such as the material of the thin metal plate 10 and the small diameter studs 14, 14,..., when the heat of fusion does not affect the back surface of the thin metal plate 10, short cycle method or arc method .. May be erected on the thin metal plate 10.

DESCRIPTION OF SYMBOLS 10 Thin metal plate 11 Stud 12 Base plate 13 Stud standing body 14 Small diameter stud 15 Insertion hole 16 Male thread part 17 Nut 20 Welding machine 21 Welding gun 22 Ground connection cable 23 Protrusion part

Claims (5)

In the stud mounting structure for standing the stud on the surface of the thin metal plate,
A stud standing body in which the stud is erected integrally with a flat base plate overlapped with the thin metal plate , and a plate thickness of the thin metal plate which is erected by welding on the thin metal plate And a plurality of small-diameter studs with a diameter of 8 times or less ,
The pedestal plate is provided with a plurality of insertion holes through which the small diameter studs are respectively inserted, and the small diameter studs inserted through the insertion holes are fixed to the surface of the pedestal plate by fixing means, and the stud standing body is provided. A stud mounting structure characterized by being fixed to the thin metal plate.   The stud mounting structure according to claim 1, wherein each of the small-diameter studs is erected on the thin metal plate by CD stud welding.   The stud mounting structure according to claim 1 or 2, wherein the small-diameter stud has a threaded portion on an outer periphery and uses a nut as a fixing means. In the stud mounting method of standing the stud on the surface of the thin metal plate,
A stud erected body is manufactured in advance by integrally standing the stud on a flat base plate having a plurality of insertion holes,
After erected a plurality of small-diameter studs having a diameter of 8 times or less the thickness of the thin metal plate by welding to the thin metal plate ,
While superimposing the pedestal plate on the thin metal plate, the stud standing body is installed on the thin metal plate so that the small-diameter stud is inserted into each insertion hole,
Thereafter, the stud is erected on the thin metal plate by fixing the small diameter stud to the surface of the base plate by fixing means and fixing the stud standing body to the thin metal plate. Stud mounting method.   The stud mounting method according to claim 4, wherein each of the small-diameter studs is erected on the thin metal plate by CD stud welding.

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