JP2006194379A - Connection pin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pin for fastening a steel plate member to a steel thick base material while allowing efficient fastening work in a fashion of improved fastened quality. <P>SOLUTION: The connection pin comprises a number of pins 1 arranged in parallel, washers 2 fitted into the pins 1, respectively, and a connector 3 for connecting a group of pins 1. It is of a connection type, using a driving tool of a gas type for continuous driving work. The washer 3 is fitted into the midway of the shaft of the pin 1, and a tapered portion 8 is formed on the shaft 4 of the pin 1 for supporting the washer 2. Thus, a work W is pressed and fixed to a base B, independently of the depth of the pin 1 to be driven. The connector 3 is formed of a raw material less tending to ionize a zinc plate or the like, therefore preventing galvanic corrosion. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a connection pin (connection fastener) suitable for fastening a steel plate member to a thick steel base material.

  For example, in a steel-framed concrete building, as shown in FIG. 7 (B), as a floor slab construction method, a steel plate deck plate 21 is fixed to an H-shaped steel beam member 20, and a concrete layer 22 is applied to the deck plate. (In many cases, concrete is not placed in a steel structure having a deck plate.)

  As a method of fixing the deck plate 21 to the beam member 20, generally, a stopper plug welding is often employed, but fixing by this welding is inferior in mobility because a welding machine is required, Since skill was required for welding, there was a problem that efficiency and quality stability were bad.

  On the other hand, there is a nail-like pin as a fastener that can easily fasten a steel plate workpiece to a base material, and a gas combustion type by forming a connection pin by connecting a large number of pins in a state aligned in parallel There is one that can perform a continuous driving operation using a portable driving tool such as a gunpowder type or a gunpowder type (for example, see Patent Document 1).

  In addition, fasteners in which washers are fitted to the shaft have been proposed in order to enhance the work holding function, and Patent Documents 2 and 3 describe that pins with washers are connected in parallel. ing. Further, it is well known that a coiled connection nail is used in the nailing machine.

  An example of a gas combustion type driving tool that can use the connecting pin of Patent Document 1 is shown in FIG. This driving tool includes a main body 23 having a built-in cylinder, a head 24 provided at the front end of the main body 23, and a magazine 25 extending downward from the head 24, and moves forward in the cylinder by the combustion pressure of gas. A rod is provided on the piston.

The magazine 25 is loaded with a connecting pin (not shown), and the connecting pin is pushed toward the head 24 by a follower (pusher) 26 pulled upward by a spring. When the tip of the head 24 is pressed against the work to unlock the safety device and the trigger 28 provided on the grip 27 is pulled, the pin located at the head of the connecting pins is driven out by the forward movement of the rod.
Japanese Patent No. 2588812 Japanese Utility Model Publication No. 57-136010 Japanese Utility Model Publication No. 49-27695

  Conventionally, the connection type driven fastener is mainly used to fasten a work piece to a soft base material compared to steel such as wood or concrete, and fastens the work piece to a thick steel base material. It is not used much. Some pins used to fix workpieces on thick steel bases are used for gunpowder guns that use the explosive power of gunpowder, but these pins are used by loading them one at a time. Therefore, there is a problem that workability is poor.

  Fastening a relatively thin steel plate member to a thick steel base material, as in the case of fastening a deck plate to a thick steel beam material, is performed in many fields including construction and civil engineering. Therefore, it can be said that a fastener and a driving system capable of performing the fastening operation efficiently and stably are demanded in many industrial fields. In particular, if the gas combustion type driving tool illustrated in FIG. 7A can be used, it is excellent in maneuverability and particularly suitable.

  This invention makes it a subject to respond to such a request.

  In order to achieve the object, the inventor of the present application has created a connecting pin according to the invention of each claim. Of these, the connecting pin according to the invention of claim 1 is provided with a large number of metal pins with a sharpened tip end of the shaft and a head provided at the base end portion of the shaft. Are fitted in a state in which the washer is not easily detached, and the pins are connected in a state of being arranged in parallel via a connecting body. The washer is fitted in a midway portion of the pin shaft along the longitudinal direction of the pin, while the coupling body includes a group of ring-shaped portions that fit in a state of not being detached from the shaft of each pin. Adjacent ring-shaped portions are connected together via a bridge portion that can be broken.

  A connecting pin according to a second aspect of the present invention is the connecting pin according to the first aspect, wherein a portion of the shaft of each pin located on the side of the head with respect to a portion into which the washer is fitted is outside the head. While the tapered portion having a larger diameter is formed, the washer is formed in a bowl shape that opens toward the tip of the shaft, and the washer is fitted to the shaft of the pin.

  The connection pin according to the invention of claim 3 is the connection pin according to claim 1 or 2, wherein the pin and washer are made of an iron-based metal such as carbon steel or stainless steel, while the connection body is made of zinc, magnesium, manganese, It is made of a non-ferrous material (preferably non-ferrous metal) that has a higher ionization tendency than iron, such as aluminum, and this coupling body is arranged so as to overlap with a washer on the tip end side of the pin.

  The connecting pin according to the invention of claim 4 is provided with a number of metal pins with a sharpened tip portion of the shaft and a head provided at the proximal end portion of the shaft, and each pin is easily washed. It is fitted in a state where it is not detached, and is connected in a state of being arranged in parallel by connecting means, and the connecting means is a separate connecting body from the washer, or is integrated through a bridge portion. A group of the washers connected to each other, and can be loaded into a magazine of a driving tool so that pins can be driven one by one, and further, a part of each pin positioned on the head side Is formed in a taper shape with an outer diameter increasing toward the head, and the washer is inserted into a midway portion along the axial direction of the pin shaft so that the washer is pinned when driven into the workpiece. On the axis of It is allowed to move toward the side of my head I.

  In each invention of the present application, since a large number of pins are connected, a continuous driving operation can be performed using a driving tool such as a gas type or an explosive type. For this reason, the efficiency of the fastening work is good. The construction quality can be stabilized by the fact that the fastening work can be performed without requiring skill and the construction quality is stable, and the work holding function is provided and the work holding function is excellent.

  By the way, when a workpiece is fastened to a thick steel base material, the base material is hard, and therefore there may be a space between the pin head and the washer after driving. That is, the pin may not be driven to the end. However, in the present invention, since the washer is fitted in the middle part of the shaft along the axial direction, the work piece can be pressed firmly even if there is a space between the pin head and the washer after driving. Can do.

  In particular, when the tapered portion is formed on the shaft of the pin as in claims 2 and 4, even if there is a space between the head of the pin and the washer after driving, the washer is firmly secured by the tapered portion. Since it can hold down, high fastening strength can be secured and it is particularly suitable.

  Further, if the washer is formed in a bowl shape opened toward the tip of the shaft as in claim 2, the washer can be applied to the surface of the workpiece at the initial stage of driving, so there is a variation in the driving depth of the pin with respect to the base material. However, the variation can be absorbed and the workpiece can be accurately pressed and held, and as a result, there is an advantage that the quality stability of the fastening construction can be improved.

  By the way, while a work such as a deck plate is generally made of a steel plate, a washer is often made of an iron plate in terms of workability and cost. In this case, electrolytic corrosion may occur due to the washer coming into contact with the workpiece. In this regard, if the coupling body is made of a material having a higher ionization tendency than iron as in claim 3, it prevents or suppresses the occurrence of a potential difference between the washer and the workpiece, thereby preventing or remarkably suppressing the electrolytic corrosion. be able to.

  Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 4 show the first embodiment, and FIGS. 5 and 6 show the second to fifth embodiments. First, the first embodiment will be described.

(1). Structure of First Embodiment First, the structure will be described with reference to FIGS. 1A is a perspective view of the connecting pin seen from the plane direction, FIG. 1B is a perspective view seen from the bottom direction, and FIG. 2A is a partially broken / separated portion. (B) is an enlarged view of the tip of the pin, and (C) is a partial bottom view.

  The connecting pins (which may be called connecting rods) are composed of a large number of pins 1 (in this example, 10 pins) arranged in parallel, washers 2 individually fitted into the pins 1, and the pins 1. It is comprised with the connection body 3 for connecting with.

  For example, as shown in FIG. 2 (A), the pin 1 includes a shaft 4 and a head 5 provided integrally at the base end thereof. The shaft 4 includes a first portion (tip portion) 6 that is tapered, a second portion (intermediate portion) 7 that is continuous to the tip portion, and a third portion that is located between the second portion 7 and the head 5 ( The second portion 7 is formed in a tapered shape whose outer diameter increases toward the head 5 at a very small angle (or curvature), and the third portion 8 is the second portion 7. It is a taper-shaped part whose outer diameter expands toward the head 5 at a larger angle.

  The first portion 6 has a rounded round shell shape. This is to cause a biting (seizing) action on the base material when entering the steel base material. Although the shallow annular groove 9 connected to the third portion 8 of the shaft 4 is formed on the seat surface of the head 5, the seat surface of the head 5 may be formed flat or tapered. . .

  Specifically, the overall length is 15 to 20 mm, the outer diameter of the head is 12 to 15 mm, the length L1 of the first portion 6 is 3 to 5 mm, the length L2 of the second portion 7 is 5 to 9 mm, The length L3 of the portion 8 is 4 to 6 mm, the reference outer diameter D1 at the boundary portion between the second portion 7 and the third portion 8 is 3 to 4 mm, and the inclination angle with respect to the axis of the second portion 7 is about 7 degrees. The inclination angle of the third portion 8 with respect to the axis is set to 30 degrees. Of course, these dimensions are examples, and specific dimensions may be set as necessary.

  The pin 1 is made of a hard steel material such as carbon steel, vanadium steel, or stainless steel, and the profile is adjusted by processing the head 5 by a header and the shaft 4 by rolling (or forging), using a wire material as a raw material. After that, it is quenched and further subjected to surface treatment (formation of a rust preventive film) as necessary to obtain a finished product.

  The washer 2 has a ring shape in plan view and is formed in a bowl shape (cross-sectional trapezoidal shape) that opens toward the tip of the pin 1, and a flange 2a is provided at the opening edge. As a matter of course, the washer 2 has a center hole 9 into which the shaft 4 of the pin 1 is fitted, and the center hole 9 is dimensioned to fit exactly in the middle portion of the second portion 7 of the shaft 4 in the pin 1. Is set to Since the second portion 7 of the pin 1 has a loose taper shape, the washer 2 is held in a state where it is not detached.

  The washer 2 is set to have an outer diameter that is substantially the same as the outer diameter D0 of the head 4 of the pin 1, but of course, it may not be the same diameter. The plate thickness can be set arbitrarily, but is preferably strong enough to cause some deformation by driving, and in this example, is set to about 1.0 to 1.5 mm. The washer 2 is made of iron plate.

  The connection body 3 is made of, for example, a zinc plate, and includes a group of ring-shaped portions 11 that fit into the shaft 4 of the pin 1 and a narrow-width bridge portion 12 that connects the adjacent ring-shaped portions 11. The ring-shaped part 11 is formed in a bowl shape so as to be in close contact with the lower surface of the washer 2, and a flange 11a is formed at the opening edge. (Note that the ring-shaped portion 11 may be a flat plate). Needless to say, the bridge portion 12 has a strength that can be broken by driving with a driving tool.

  The thickness of the connection body 3 may be about 0.5 mm, and the bridge portion 12 is made as narrow as possible in a state where the connection function is maintained in order to make it easy to break. Further, the center hole 13 of the ring-shaped portion 11 is set to an inner diameter that fits in a state in which the pin 1 is not detached from the second portion 7 of the shaft 4. Note that the washer 2 may be disposed at the boundary between the second portion 7 and the third portion 8 of the shaft 4 in the pin 1.

(2). Driving process Next, the driving process will be described with reference to FIGS. FIG. 3 is a diagram showing a state in which the pins 1 are driven. The connecting pins are used by being loaded into the magazine 25 of the driving tool illustrated in FIG. 7A, for example. It moves along the first guide body 15 that contacts the lower surface of the body 3 and the second guide body 15 that contacts the seating surface of the head 5.

  Then, when the pin 1 positioned at the head receives the pressing action of the rod L, the bridge portion 12 connecting the pin 1 positioned at the head and the subsequent pin 1 is broken, and the pin 1 positioned at the head moves forward. As a result, as shown in FIG. 4, the shaft 5 of the pin 4 enters the workpiece W and the substrate B, and the workpiece W is fastened to the substrate B.

  In this case, the degree to which the shaft 4 of the pin 1 enters the substrate B depends on many factors such as the hardness and thickness of the substrate B, the thickness and hardness of the workpiece W, and the strength of the washer 2. However, in general, as shown in FIG. 4, there is a space between the workpiece W and the head 5.

  And even if there is a gap between the head 5 and the washer 2 as shown in FIG. 4, the washer 2 is held by the third portion (tapered portion) 8 of the pin 1 so as not to move backward. High fastening strength can be secured by strongly pressing W against the base material B.

  In this case, since the washer 2 has a bowl shape, the deformation of the washer 2 by the third portion 8 of the pin 1 is allowed, and the pin 1 can be driven into the substrate B as deeply as possible. In addition, the washer 2 has a higher vertical height (the height of the pin 1 in the axial direction) than the flat type, so that even if the driving depth of the pin 1 is shallow, the washer 2 is firmly in contact with and holds the work W. Can be fixed.

  By the way, when different metals are in contact with each other, electrolytic corrosion may occur due to a potential difference. This electrolytic corrosion is caused by the fact that one member is in an unstable state that easily reacts with other atoms due to the movement of electrons from one material to the other, and electrons are emitted from one member. As a result, the reaction between the one member and water or oxygen existing in the vicinity thereof is promoted, and corrosion proceeds. This electrolytic corrosion may occur between similar metals due to environmental differences such as temperature. If the washer 2 and the workpiece W are in direct contact with each other, electrolytic corrosion may occur.

  As a countermeasure against this electrolytic corrosion, it is common to interrupt the energization by interposing a non-conductive material between both members, and synthetic resin is often adopted as the non-conductive material. However, since the synthetic resin is vulnerable to heat, there is a possibility that problems such as a decrease in fastening force may occur if it is melted by fire.

  On the other hand, when the ring-shaped part 11 made of a zinc plate is interposed between the washer 2 and the workpiece W as in the present embodiment, the energization between the washer 2 and the workpiece W is interrupted or significantly reduced. Suppressing can prevent or significantly suppress electrolytic corrosion.

  That is, since zinc constituting the ring-shaped portion 11 has a higher ionization tendency (higher activity) than iron, which is the main component constituting the washer 2 and the workpiece W, both the washer 2 and the workpiece W from the ring-shaped portion 11. In this way, by receiving the electrons from the ring-shaped portion 11, the iron atoms constituting the washer 2 and the workpiece W are held in a stable state in which they do not easily react with water or oxygen. As a result, corrosion of the washer 2 and the workpiece W is prevented or significantly suppressed. In other words, the washer 2 and the workpiece W are in the same state as when galvanized. And since the connection body 3 is metal, it does not melt by fire and can ensure a fastening state.

(3). Other embodiment (FIGS. 5 to 6)
In FIG. 5, 2nd Embodiment which is a modification of 1st Embodiment is shown. The basic configuration of this embodiment is the same as that of the first embodiment. The difference from the first embodiment is that the cylindrical portion of the washer 2 is almost cylindrical and the area of the top plate portion 2b is large. The flange is not provided at the edge. In this embodiment, the top plate portion 2b of the washer 2 is easier to deform than in the first embodiment.

  A third embodiment shown in FIG. 6A is a specific example of claim 4, and the washer 2 and the connecting body 3 are both flat (flat). The shaft 4 of the pin 1 is composed of a bullet-shaped first portion 6, a long tapered second portion 7, and a short third portion located near the seat surface. The taper angle of the two portions 7 is set to be larger than that of the first portion.

  Therefore, in this embodiment, the washer 2 is pressed and fixed by the work W by the support force of the second portion 7. It is also possible to form the whole shaft 4 in a simple taper shape whose outer diameter expands at a substantially equal rate. The material of each member is the same as in the first embodiment.

  In the fourth embodiment shown in FIG. 6B, the washer 2 is formed in a bowl shape that opens toward the head 5 side, and the ring-shaped portion 11 of the coupling body 3 is also fitted to the washer 2 from the outside. It is formed in a bowl shape.

  In the fifth embodiment shown in FIGS. 6C and 6D, the adjacent washers 2 are connected via the bridge portion 2c, and thus the group of washers 2 is a connected washer. The washer 2 is formed in a bowl shape that is divided and opened on the tip side of the pin 1, and an auxiliary spacer 16 made of a material having a high ionization tendency, such as a zinc plate, is overlaid on the lower surface thereof. A notch 17 is formed in the bridge portion 2c connecting the washer 2 as shown in an enlarged view (D) (the notch 17 may be formed on only one side of the upper and lower surfaces).

(4). Others The present invention can be embodied in various ways other than the above embodiment. For example, the shaft of the pin may be formed in a straight shape excluding the tapered tip portion, or may be formed in a form in which a straight portion is formed between the tapered tip portion and the tapered portion near the head. You may do it. Alternatively, the head only needs to have a function capable of preventing the washer from coming off. Therefore, the outer peripheral surface of the head and the outer peripheral surface of the tapered portion of the shaft may be continuous without a step.

  Moreover, the planar shape (shape seen from the axial direction) and cross-sectional shape of a washer and a coupling body can also be set arbitrarily.

It is a perspective view of a connecting pin. (A) is a partial front view in which a part of the connecting pin is broken and separated, (B) is an enlarged view of the tip of the pin, and (C) is a partial bottom view of the connecting pin. It is a display which shows the launch state of a pin. It is a figure which shows the fastening state of a workpiece | work. It is a figure which shows 2nd Embodiment. It is a figure which shows 3rd-5th embodiment. (A) is a perspective view of an example of a gas type driving tool, (B) is a perspective view which shows a part of building structure.

Explanation of symbols

W Work B Steel base material 1 Pin (Head with head)
2 Washers
3 Linkage 4 Axis 6 First part (tip)
7 Second part 8 Third part (tapered part having washer holding function)
11 Ring-shaped part of connecting body 12 Bridge part of connecting body

Claims (4)

The tip of the shaft is sharpened and the base end of the shaft is provided with a large number of metal pins with a head, and the washer is fitted into the shaft of each pin so that it is not easily detached. And each pin is a connecting pin connected in a state of being arranged in parallel via a connecting body,
The washer is fitted in a midway portion along the longitudinal direction of the shaft of the pin, while the coupling body includes a group of ring-shaped portions that fit in a state of not being detached from the shaft of each pin, Adjacent ring-shaped parts are connected together via a tearable bridge part,
Connecting pin. Of the shafts in each pin, a portion located on the head side with respect to the portion into which the washer is fitted is formed with a tapered portion whose outer diameter increases toward the head,
The washer is formed in a bowl shape that opens toward the tip of the shaft, and the washer is fitted into the shaft of the pin.
The connecting pin according to claim 1. The pin and washer are made of a ferrous metal such as carbon steel or stainless steel, while the connecting body is made of a non-ferrous material having a higher ionization tendency than iron, such as zinc or magnesium. It is arranged to overlap with the washer on the tip end side of the pin,
The connecting pin according to claim 1 or claim 2. The tip of the shaft is sharpened, and the base end of the shaft is equipped with a large number of metal pins with a head, and each pin is fitted in a state where the washer is not easily detached and connected Connected in parallel by means, and the connecting means is a separate connecting body from the washer, or a group of the washers connected together through a bridge portion, and , A connecting pin that can be loaded into the magazine of the driving tool and driven out one by one,
A part of the shaft of each pin located on the side of the head is formed in a tapered shape with an outer diameter increasing toward the head, and the washer is arranged along the axial direction of the pin shaft. By fitting in the middle part, the washer is allowed to move toward the head side along the axis of the pin when driven into the workpiece,
Connecting pin.

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