JP5263283B2 - Stud pin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stud pin which is optimum for stud welding to a structural material worked with a thin steel material such as a deck plate. <P>SOLUTION: The stud pin A includes a rod pin part the one end of which has a welding tip part 1 and the other end of which is formed of a spherical part 2 and a pin cover part 4. The welding tip part 1 of the rod pin part is projected to the outside, and the spherical part 2 is covered with a pin cover part 4 so as to be present in the inside. In the circumferential side wall of the pin cover part 4, in addition to a projection part 5' of holding the rod pin part, a projection part 5 dealing with the application of being joined to a full-screw bolt, a long nut or the like is formed. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a stud pin for attaching a pin to the surface of a steel material by stud welding.

The present invention relates to a stud pin used for attaching a structure such as a pipe, a cable, an air conditioner, or a mechanical facility to a structural material such as a steel beam, a pillar, or a deck plate in water supply / drainage, air conditioning, electrical equipment construction, or the like. .
In general, stud welding is broadly divided into leading and trailing. The former is a method in which a stud pin is first erected on the surface of a structural material, and then a covering material such as a fireproof heat insulating material, a soundproof material, and a heat insulating material is suspended thereon. (See Patent Document 1). On the other hand, the latter is a so-called post-stud stud welding method in which a coating material such as a refractory heat insulating material, a sound insulating material, and a heat insulating material is wound around the surface of the structural material and a stud pin for standing up is fixed. It is. (See Patent Document 2). The present invention relates to the former stud pin for leading.

JP-A-8-14233 JP 2000-246444 A

Conventionally, in order to install structures such as pipes, cables, air conditioning equipment, mechanical equipment, protective pipes, etc., on steel structural members such as beams, pillars, deck plates, etc., a support called a saddle that restrains the outer periphery of these structures After drilling the structural material with a drill, the saddle was attached to the structural material using a drilling tapping screw.
Alternatively, a rod-shaped male screw called a full screw is cut into a predetermined length, one end is fixed to a structural material by gas welding or arc welding, and a support with a restraining portion is attached to the whole screw to construct the structure. It was fixed. Furthermore, after drilling the structural material with a drill, a female screw anchor may be inserted, and all the screws may be screwed into the female screws to be fixed, and a support with a restraining portion may be attached to all the screws. It was.

  In particular, in the case of a thin structural material such as a deck plate, the structural material breaks down. Has been adopted. However, this method is not preferable in terms of waterproofing, and drilling is difficult because there is no drill compatible with both the structural material and concrete. Rather than that, I was worried about damaging invisible pipes and wires embedded in concrete during drilling.

  In any case, the method of drilling the structural material or fixing all the screws by gas welding or arc welding is not possible in the case of a thin structural material such as a deck plate. there were. In addition, these operations involve a lot of work at high places, and it is necessary for the operator to operate heavy work tools. Therefore, there has been a demand for a stud pin that can be erected easily even if it is a thin structural material and does not break the structural material.

Means for Solving the Invention

The present invention has been made as a result of diligent research in view of such circumstances and background, and the problem to be solved is to develop a stud pin that can be easily used in a wide range.
That is, the first characteristic configuration of the present invention is a rod pin portion made of a conductive material having a welding tip portion at one end and a spherical portion at the other end, and the welding tip portion of the rod pin portion is externally provided. A stud is provided with a cylindrical pin cover part that protrudes so that the circular ball part is present inside, and a protruding part that fits or joins all screw bolts or long nuts is formed on the peripheral side wall of the pin cover part On the pin.
A second characteristic configuration of the present invention resides in a stud pin in which the rod pin portion and the pin cover portion are configured such that the angle can be changed or rotated with a circular ball portion of the rod pin as a fulcrum.
A third characteristic configuration of the present invention is a stud pin in which an opening from which a welding tip portion of a rod pin formed at one end of the pin cover portion protrudes has a size such that a spherical portion of the rod pin does not protrude. is there.
According to a fourth characteristic configuration of the present invention, the protruding portion of the pin cover portion is configured as a female screw protrusion that can be screwed into the entire screw bolt until the tip of the entire screw bolt contacts the spherical portion of the rod pin. There is a stud pin.

  In the stud pin of the present invention, the rod pin portion is not particularly limited as long as the rod pin portion is formed of a conductive material and is selected from a metal material having a low electrical resistance and good electrical conductivity. For example, it consists of materials such as iron plate, copper plate, stainless steel plate, aluminum plate and brass plate. Or you may consist of the material of these alloys. In addition, the thickness and length of the rod pin part to be molded are sufficient to determine the size based on the size and weight of the structure to be mounted or suspended later.

  The rod pin portion has a welding tip at one end of the pin, and a tip suitable for welding is formed. For example, a welding tip that is sharpened like a knife or one that has a vertically sharp protrusion on a circle center is preferable, and is not particularly limited. The other end of the welding tip is formed as a round sphere. Of course, the size of the round sphere is larger than the thickness of the rod pin portion. The shape of the spherical portion referred to in the present invention is basically preferably a perfect spherical shape, but may be an elliptical spherical shape as long as the rod pin portion is erected vertically from the surface of the spherical portion. It is preferable that the rod pin portion is formed integrally with the welding tip portion and the spherical portion.

  Next, the pin cover portion in the present invention is not particularly limited as long as it is a cylindrical body, such as a cylindrical shape or a prismatic shape. However, the welding tip portion of the rod pin portion protrudes outside the cylinder, and the spherical portion is in the cylinder. It is a cover that covers it. Therefore, one end of the pin cover part protrudes so that the welding tip part of the rod pin part protrudes to the outside, but the narrowing is formed according to the size of the spherical part so that the circular ball part does not protrude. With the size of this narrowing down, the rod pin portion can freely change the angle and rotate with the circular sphere as a fulcrum.

The pin cover, a metal material, ceramic material, intended to be molded of a material such as plastic material, is not particularly limited, such as the above-mentioned long as cylinder cylindrical or prismatic shape what moldability and strength desirable. And it is effective to form protrusions such as protrusions for male threads and female threads corresponding to the purpose of fitting or joining with all screws and long nuts as necessary on the peripheral side wall of the pin cover part. is there.
For example, in the case of a cylindrical pin cover part, it can be obtained by cutting a cylindrical pipe into a desired length. Further, in the case of a prismatic pin cover portion, it can be obtained by punching a flat iron plate according to a development view and then bending and forming it into a prismatic shape. In this punching process, the projections and depressions of the projections and recesses can be easily obtained by processing and molding at the same time.

  The stud pin of the present invention constructed as described above is constructed by pressing the welding tip protruding from the pin cover part against the structural material (base material) and applying a welding gun to the circular ball part in the pin cover part. It is sufficient to supply an instantaneous large current to generate an arc at the tip of the stud pin. Then, the tip of the stud pin is melted, and the stud pin can be erected on the structural material surface with the melt. When supplying power, the welding gun can be directly applied to the spherical portion, or power can be supplied via a power supply plug inserted into the pin cover portion, or via all screw bolts joined to the pin cover portion.

  When using the stud pin of the present invention, the power supply circuit of the DC power supply is provided with an overcurrent protection circuit. When the charge of the capacitor is discharged to the stud and the structural material, the DC power supply By using a capacitor discharge type stud welding device that makes the output current equal to or less than the holding current of the thyristor and turns off the thyristor to open the discharge circuit, the welding device is small, lightweight, portable, and high Even if the work is performed at a place, the burden on the operator is light and the gun of the welding apparatus can be operated with one hand.

effect

  The stud pin of the present invention is formed by integrally forming a welding tip portion and a spherical portion with a relatively thin rod-like pin lot and covering this with a pin cover portion of a cylindrical body. In addition, large current welding using a large apparatus that directly welds all screw bolts becomes unnecessary. Therefore, stud pins can be erected without worrying about perforation even when welding studs to light iron materials or deck plates made of thin structural materials. Since the welding device is small and light, the burden on the operator is light even when the welding device is carried or work at a high place, and the welding gun can be operated with one hand.

  Furthermore, it is easy to suspend an air conditioner, a mechanical facility, etc. via the projection part of the pin cover part of the stud pin erected. Also, even if external stress such as bending or twisting that occurs during installation occurs in the pin cover part, the pin cover part can be freely reoriented or rotated with the circular ball part as a fulcrum to release the external stress. Therefore, the stress on the welded portion is reduced and the failure of the structural material is avoided. The stud pin of the present invention is most suitable for stud welding to a structural material processed with a thin steel material such as a so-called deck plate.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, a specific configuration of the stud pin according to the present invention will be described in detail with reference to the drawings.
First, FIG. 1 and FIG. 2 show an example of a stud pin according to the present invention. As is clear from this figure, the stud pin A of the present invention comprises a rod pin portion 3 formed of a conductive material, and has a welding tip portion 1 that forms a protrusion that is pointed perpendicular to the center of the circle at one end thereof. And the other end is formed integrally with the circular sphere portion 2. The rod pin part 3 is covered with a pin cover part 4 of a prismatic cylindrical body with the welding tip part 1 projecting to the outside and the circular sphere part 2 is contained.
A plurality of inner protrusions 5 are formed on the peripheral side wall of the pin cover portion 4. The protruding portion 5 ′ is a protruding portion that supports the ball of the circular sphere portion 2 from below so that the rod pin portion 3 loaded in the pin cover portion 4 does not fall out. The protruding portion 5 is screwed into the pin cover portion 4. It is the projection part provided so that it might join to the thread groove of all the screw bolts.

  Incidentally, as shown in FIG. 3, a welding tip 1 having a vertically pointed projection on the center of a circle and a 7 mm diameter circular sphere 2 at the other end are integrally formed on a pin having a length of 10 mm and a shaft diameter of 3 mm. The rod pin portion 3 was loaded from the bottom of the pin cover portion 4 having a length of 25 mm and a 14 mm square pillar in which a plurality of inwardly protruding portions 5 ′ and 5 were formed on the peripheral side wall to obtain a stud pin A. A 3/8 full screw bolt having a length of 300 mm was fastened to the stud pin A until it was brought into contact with the spherical portion 3 while being joined to the protruding portion 5.

  Next, the welding tip 1 of the stud pin A was pressed against the deck plate surface having a thickness of 0.8 mm, and a large current was passed through the stud gun through all screw bolts to perform stud welding. As a result, the stud pin A of the present invention could be erected without any energization failure and without causing the deck plate surface to fail. As a result, it was recognized that all screw bolts can be freely changed in direction and rotated together with the pin cover portion 4 and the external stress is released. The stud pin A was measured to have a tensile strength of 150 kg or more.

It is a front center longitudinal view of a stud pin showing an example of an embodiment of the present invention. It is a perspective external view of the stud pin of FIG. It is explanatory drawing which shows the state by which the failure of a structural material is avoided when external stress arises in the stud pin of this invention after welding.

A ... Stud pin 1 ... welding tip 2 ... spherical part 3 ... rod pin part 4 ... pin cover part 5 ... projection part 5 '... projection part B ... Structural material

Claims (4)

  A rod pin part made of a conductive material having a welding tip part at one end and a spherical part at the other end, and a cylinder in which the welding tip part of the rod pin part protrudes to the outside and the sphere part is inside. A stud pin including a body pin cover portion, and a protruding portion that fits or joins all screw bolts or long nuts is formed on a peripheral side wall of the pin cover portion. The stud pin according to claim 1, wherein the rod pin portion and the pin cover portion are configured to be capable of changing an angle or rotating with a circular ball portion of the rod pin as a fulcrum . The stud pin according to claim 1 or 2, wherein the opening from which the welding tip of the rod pin formed at one end of the pin cover portion protrudes is sized so that the round portion of the rod pin does not protrude. The projection of the said pin cover part is comprised by the protrusion for internal threads which can screw in this all screw bolt until the front-end | tip of all the screw bolt contacts the spherical part of a rod pin. The stud pin as described in the item.

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