JPH0318551B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides a method for attaching a non-conductive material to a non-conductive material by penetrating a metal stopper into a non-conductive material and electrically welding its tip to a metal base material. The present invention relates to a welding device that connects a metal base material and a metal base material.

(Prior Art) Walls of prefabricated houses and the like are constructed by connecting panels (non-conductive members) to crosspieces (metallic base materials). Further, the floor is constructed by connecting boards (non-conductive members) to H steel (metal base material) as beam members.

Conventionally, when connecting the above-mentioned non-conductive member to a metal base material, it may be done manually using, for example, screw nails or tapping screws. Below, the 6th
7, the wall manufacturing process will be explained as an example.

When using screw nails, as shown in FIG. 6, the panel 21 is brought into contact with the hollow crosspiece 22, and the screw nail 23 is driven from the surface of the panel 21 into the crosspiece 22 using a hammer (not shown). The panel 21 and the crosspiece 22 were connected.

When using tapping screws, as shown in FIG.
The panel 21 and the crosspiece 22 were connected by screwing into them.

In addition, a technology for connecting asbestos or other insulating materials (non-conductive materials) to metal base materials using welding equipment was developed in Japanese Patent Application Laid-open No. 49.
-Described in Publication No. 43056. In detail,
First, the insulation material is layered on the metal base material. Then, the head of the stud (metal fastener) is magnetically attracted to the welding holder of the welding equipment, and the worker, while holding this welding holder, inserts the stud into the insulation material, so that the tip of the stud is attached to the metal base. When the two are brought into point contact, a current is passed between them, causing a spark and welding between the two.

(Problem to be solved by the invention) However, when using the screw nail 23,
There was a problem in that the screw nail 23 could not be driven into the corners of the metal base material, and the places where it could be driven were limited.

Further, when using the tapping screw 25, the hole 24 had to be formed in the metal base material in advance, which required a lot of effort. Furthermore, it was difficult to align the tapping screw 25 with the hole 24 and screw it in. Further, in this case as well, the tapping screws 25 cannot be screwed into corner portions, and the screwing places are limited.

Furthermore, when using the screw nails 23 and tapping screws 25, connection is difficult if the metal base material is too thin or too thick, and there are restrictions on the thickness of the metal base material.

Furthermore, in the welding device described in JP-A No. 49-43056, the insertion of rivets, sparking between the tip of the rivet and the metal base material, welding, etc. are all carried out manually by the operator. There was a problem that required skill in welding work. In particular, it was difficult to press the rivets during welding, making it impossible to weld with constant connection strength. Furthermore, if the non-conductive member is hard, it is difficult to insert rivets into it.

(Means for Solving the Problems) This invention has been made to solve the above problems, and its gist is to penetrate a metal fastener through a non-conductive member and connect the tip end to a metal base. A device for connecting a non-conductive member and a metal base material by electrically welding the material to the metal base material, which includes a welding device main body and a driving machine, the driving machine includes a hammer that applies an impact force, and a metal base material. A pressurizing tip that pressurizes the manufactured stopper;
an elastic body that is interposed between the hammer and the pressure tip and biases the pressure tip in the projecting direction; one electrode of the welding device main body is connected to the pressure tip; There is a welding device characterized in that an electrode is connected to the metal base material.

(Function) Layer a non-conductive member on a metal base material. One electrode of the welding device main body is connected to the pressure tip of the driving machine, and the other electrode is connected to the metal base material. Next, an impact force is applied to the hammer, and the pressure tip is urged in the protrusion direction through the elastic body, and the metal stopper is press-fitted from the surface of the non-conductive member toward the metal base material. do. Then, when the tip of the metal stopper approximately reaches the metal base material, electricity flows between the two. Additionally, the current generates molten metal, and solidification of the molten metal connects the non-conductive member to the metal substrate.

(Embodiment) Hereinafter, an embodiment of the present invention will be described based on the drawings from FIG. 1 to FIG. 5.

In FIG. 1, reference numeral 1 denotes a welding device, which penetrates a hollow pin 11 (metal fastener) through a board 12 (non-conductive member), and connects its tip 11a to an H steel 13 (metallic The board 12 and the H steel 13 are connected by electric welding to the base material. This welding device 1 includes a capacitor 2 (welding device main body) and a driving machine 3.

The capacitor 2 has a pair of electric wires 4 and 5. A contact holder 6 is provided at the tip of one of the electric wires 4.

The driving machine 3 includes a cylindrical hammer 7 to which an impact force is applied by a striking mechanism (not shown), and a pressurizing tip 8 inserted into the hammer 7 so as to be able to move forward and backward.
and the pressure tip 8 provided in the hammer 7.
It is equipped with a coil spring 9 (elastic body) that always biases the holder in the projecting direction. Note that the above-mentioned striking mechanism is the same as that of a known automatic nailing machine, so a description thereof will be omitted.

The cylindrical hammer 7 has an annular flange 7a on the inner peripheral surface of the middle portion. The pressurizing tip 8 is formed of a hemispherical head 8a, an elongated small diameter part 8b, a large diameter part 8c, and an insertion part 8d which performs the function described below.
The insertion portion 8d has a gentle taper that becomes thinner toward the distal end, and the distal end portion 8e thereof has a conical shape. The small diameter part 8b of the pressurizing tip 8 is inserted into the collar part 7a of the hammer 7, and is prevented from coming off by the head 8a and the large diameter part 8c. Also,
One electrode of the capacitor 2 is connected to the head 8a of the pressurizing chip 8 via an electric wire 5.
The coil spring 9 is interposed between the flange portion 7a of the hammer 7 and the large diameter portion 8c of the pressure tip 8.

The pin 11 is formed into a cylindrical shape and has a hollow portion 11c that penetrates from the tip portion 11a to the head portion 11b. The outside of the head 11b expands into a brim shape,
The insertion portion 8d of the pressure tip 8 is inserted into the hollow portion 11c. Note that the outer diameter of the proximal end of the insertion portion 8d is slightly larger than the inner diameter of the hollow portion 11c. Pin 11 is
A large number of chips are stored in the driving machine 3, and are supplied one by one to positions corresponding to the pressure chips 8. Note that this feeding mechanism is the same as that of a known automatic nailing machine, so a description thereof will be omitted.

A case will be described in which a board 12 is connected to an H-steel 13 using the welding apparatus 1 having the above-described configuration to manufacture a floor of a prefabricated house or the like. Note that the board 12 is
Non-conductive and non-flammable (or flame-retardant) materials such as hard wood chips and cement materials.

As shown in FIG. 1, the board 12 is placed on the H steel 13. The other electrode of the capacitor 2 is connected to the H steel 13 via the electric wire 4 and the contact holder 6. From this state, hold the driving tool 3 in your hand and place the tip end 11 of the pin 11 above the surface 12a of the board 12.
Place a side down.

When the switch of the driving machine 3 is turned on and the striking mechanism is activated, the hammer 7 descends at high speed, and the pressure tip 8 follows suit. Then, the insertion portion 8d of the pressure tip 8 is inserted into the hollow portion 11c of the pin 11, and the pin 11 is lowered with the large diameter portion 8c of the pressure tip 8 in contact with the head portion 11d of the pin 11. At this time, the outer diameter of the distal end side of the insertion portion 8d is
The insertion part 8d is slightly larger than the inner diameter of the insertion part 1c.
is press-fitted into the hollow portion 11c, and the pin 11 can be stably supported.

As shown in FIGS. 2 and 3, the pin 11 is driven into the H steel 13 from the surface 12a of the board 12. At this time, since the pin 11 is cylindrical, the pin 11 can be press-fitted into the board 12 with a relatively small force. The shavings of the board 12 enter the hollow portion 11c of the pin 11 and do not come out. For this reason, pin 11
No large stress is applied to the board 12 during press-fitting, and cracks can be prevented.

As shown in FIG. 4, the tip 11a of the pin 11
When the wire passes through the board 12 and almost reaches the H steel 13, an electric circuit returns from the capacitor 2 to the capacitor 2 via the wire 5, pressure tip 8, pin 11, H steel 13, contact holder 6, and wire 4. The electricity formed and stored in the capacitor 2 instantly flows and sparks between the pin 11 and the H steel 13.
Note that the spark time is approximately 4/1000 seconds.
When the tip of the pin 11 hits the H steel 13, this H
The reaction force from the steel 13 causes the pin 11 to rebound, but due to the elastic force of the coil spring 9,
This rebound can be prevented, and the tip of the pin 11 can be
It can be brought into reliable contact with the steel 13. Moreover, by continuing to press-fit the pin 11 with the elastic force of the coil spring 9 after the spark starts,
A sufficient amount of the tip portion 11a of the pin 11 and a portion of the H steel 13 can be melted. As a result, due to the solidification of this molten metal 14, as shown in FIG.
The tip 11a of the pin 11 is firmly welded to the H steel 13.

Further, since the molten metal 14 is cooled and solidified around the cylindrical tip 11a having a relatively large diameter,
The welding area can be widened, and the connection can be made stronger. Furthermore, when the molten metal 14 cools down to room temperature, the molten metal 14
and the pin 11 contracts, and the head 11b of the pin 11
As a result, the board 12 is crimped, so that the above-mentioned connection can be further strengthened.

The present invention is not limited to the above embodiments, and various embodiments are possible. This welding device can be used to manufacture a wall by connecting a panel (hard non-conductive member) to a crosspiece (metal base material). Also,
This welding device can also be used for plywood and the like (non-conductive members). Even in this case, sparks occur locally and there is little air, so no combustion occurs. Furthermore, it can also be used to connect flexible flame insulating materials (non-conductive members) and the like.

(Effects of the Invention) As explained above, in the present invention, since electric welding is used, non-conductive members can be connected at any location on the metal base material. Furthermore, the metal base materials can be connected regardless of whether they are thin or thick.

Furthermore, when welding a non-conductive member to a metal base material, the metal stopper is driven in by a driving machine, so workability is good and welding is possible even if the non-conductive member is hard.

Furthermore, the elastic force of the elastic body allows the tip of the metal stopper to reliably come into contact with the metal base material, and a predetermined pressing force can be applied to the metal stopper, allowing the molten metal to This can be ensured sufficiently, and the connection strength between the non-conductive member and the metal base material can be increased.

[Brief explanation of the drawing]

The drawings from Fig. 1 to Fig. 5 show one embodiment of the present invention, and Fig. 1 shows a partially cross-sectional state before starting the work of connecting the boards using a welding device. Figure 2 is a partial cross-sectional view of the state immediately after the board connection work has started, Figure 3 is a cross-sectional view of the state immediately before the tip of the pin reaches the H steel, and Figure 4 is a cross-sectional view of the state immediately before the tip of the pin reaches the H steel. A cross-sectional view showing the state in which the tip of the pin reaches the H steel and sparks, Fig. 5 is a cross-sectional view showing the state after the connection is completed, and Figs. It is a sectional view showing a state where a conductive member is attached to a metal base material. 1... Welding device, 2... Capacitor (welding device body), 3... Driving machine, 7... Cylindrical hammer,
8... Pressure chip, 9... Coil spring (elastic body),
11... Pin (metal stopper), 11a... Tip, 12... Board (non-conductive member), 13...
H steel (metal base material).

Claims (1)

[Claims] 1. In a device that connects a non-conductive member and a metal base material by passing a metal stopper through the non-conductive member and electrically welding its tip to the metal base material, the welding device body and The driving machine includes a hammer to which an impact force is applied, a pressurizing tip that pressurizes the metal stopper, and a pressurizing tip that is interposed between the hammer and the pressurizing tip and pushing the pressurizing tip in the projecting direction. a biasing elastic body, one electrode of the welding device main body is connected to the pressure tip, and the other electrode of the welding device main body is connected to the metal base material. .