JP2007120706A - Driven type fastener holding strip and connection fastener - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a crack of a sleeve sure in a fastener holding strip of a type by which the sleeve is dispersed by being driven into a work. <P>SOLUTION: The sleeve 2 is composed of a first annular portion 3, a second annular portion 4, and an intermediate portion 5. A tapered portion 10 is formed in the first annular portion 3, and a forked foot body 6 is formed at the second annular portion 4. The intermediate portion 5 is thin where a window hole is formed. As parts of a vertically cracking means, an upper vertically long groove 12 and an upper end face notch 13 are formed at the first annular portion 3 and a cut and opened groove 17 and a lower face notch 18 are formed at the second annular portion 4. The existence of the tapered portion 10 and the forked foot body 6 causes the sleeve 2 to be surely cracked in two by the compression of the head P2 of a pin P and broken away from the pin P. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a connecting fastener used by being loaded on a gas combustion type or pneumatic type driving tool and a synthetic resin strip used therefor.

  In order to fix the plate-shaped workpiece to the base material, a driving tool using gas combustion pressure or pneumatic pressure or explosive power of explosives is used, and a driving fastener such as a nail is connected to this driving tool. Connected fasteners are used.

  There are various types of connection fasteners depending on the application and the type of driving tool. For example, as a connection fastener for fixing a work to a hard member such as concrete or steel, a nail that is tapered on a synthetic resin strip is used. A connecting pin with a head-shaped pin (鋲) is used. That is, the strip constituting the connecting pin has a configuration in which a large number of sleeves (for example, about 10) into which one pin is fitted are arranged in parallel, and adjacent sleeves are connected by a breakable bridge portion. .

  The connecting pin is used by being loaded into the magazine of the driving tool. When the head of the pin located at the head is struck with the rod (hammer blade) of the driving tool, the sleeve located at the head separates from the subsequent sleeve. The shaft portion of the pin enters the workpiece and the substrate, and thereby the workpiece is fixed to the substrate.

In the strip, the sleeve that is struck with the pin remains in the pin in the state of a washer, and the sleeve that is struck with the pin breaks and separates (scatters) from the pin and the workpiece. There is. The former type is described in, for example, Patent Document 1, and the latter type is described in, for example, Patent Document 2.
Japanese Patent No. 2588812 JP-A-11-198064

  The latter type of strip is used when it is not desirable for the sleeve to remain on the workpiece. In other words, it is used when the head of the pin must be in close contact with the workpiece. However, in rare cases, the sleeve may remain sandwiched between the head of the pin and the workpiece when driven.

  The present invention has been made in view of such a current situation, and an object of the present invention is to provide a strip and a connecting fastener in which the sleeve reliably separates from the fastener and the workpiece when driven.

  The reason why the sleeve remains in the fastener and the workpiece when the fastener is driven is that when the sleeve is pinched between the head of the fastener and the workpiece, the sleeve is insufficient to separate in the radially outward direction of the fastener, Further, the reason why the sleeve is insufficiently separated in the radially outward direction of the fastener is that the pressing force by the fastener head may not sufficiently act as a longitudinal crack of the sleeve. Based on this analysis, the present inventor has completed the present invention.

  The strip according to the present invention has, as a basic configuration, a large number of sleeves into which a single headed-in type fastener is fitted, and adjacent sleeves are arranged via bridge portions that are torn off when the fasteners are punched out. In addition, each sleeve is formed with a vertical dividing means for separating from the fastener by being clamped between the head of the fastener and the workpiece.

  In the invention of claim 1, as a feature, the vertically dividing means is formed in a taper portion whose inner diameter is enlarged toward the outer periphery of the head of the fastener, on the inner peripheral surface of the sleeve. And at least one of forming a plurality of legs that expand in a crotch shape by the clamping pressure on the side of the sleeve that contacts the workpiece.

  The invention of claim 2 also relates to a strip. In the strip of claim 1, each of the sleeves has a first annular portion having a tapered portion and two legs projecting in a bifurcated state. It consists of the 2nd annular part and the intermediate part located between these 1st annular parts and the 2nd annular part, and the said intermediate part is the front seen from the direction orthogonal to the axis of a sleeve and the arrangement direction of a sleeve In addition to being recessed on both the front and rear sides in the view, and a window hole through which the pin is exposed opens in the front and rear, the legs of the second annular portion are disposed on the left and right sides in the front view, and In the first annular portion and the second annular portion, a thin-walled portion is formed that has a fracture surface when the two annular portions are divided into two in the front view.

  As described in claim 3, the present invention also includes a connecting fastener formed by fitting and holding a drive-in fastener in each sleeve of the strip described in claim 1 or 2.

  When the taper portion is formed on the sleeve as in the present invention, when the sleeve is pressed by the head of the fastener by the driving of the fastener, the head of the pin is fitted into the taper portion, so that the sleeve is forcibly pushed outward radially. As a result, the longitudinal division of the sleeve can be ensured.

  In addition, when the portion of the sleeve that contacts the work is formed into a plurality of crotch shapes composed of a plurality of legs as in the present invention, the sleeve is clamped between the head of the fastener and the work by driving the fastener. It becomes a crotch split state in which the distance between the legs spreads to each other, and thereby the longitudinal division of the sleeve can be ensured.

  Therefore, according to the present invention, it is possible to ensure that the sleeve scatters (separates) from the fastener and the workpiece during driving. The formation of the tapered portion and the formation of the foot are effective even when used alone, but it is preferable to use both in combination because the longitudinal cracks of the sleeve can be made more reliable.

  The invention of claim 2 is similar to Patent Documents 1 and 2, in which a recess is formed in the intermediate portion of the sleeve, but the intermediate portion is in a state separated into right and left by the presence of the recess and the window hole. Therefore, it is further ensured that the sleeve is vertically cracked and separated into left and right.

  Next, an embodiment of the present invention will be described with reference to the drawings.

(1). Structure of First Embodiment FIGS. 1 to 5 show the first embodiment. The strip and the connecting pin of this embodiment are used for, for example, a driving tool using gas combustion pressure, and are used for fixing a steel plate member or sheets (for example, a waterproof sheet) to concrete.

  FIG. 1 shows the appearance of the strip 1, in which (A) is a plan view, (B) is a front view, and (C) is a bottom view. The strip 1 is composed of a large number (for example, 8 to 10) of sleeves 2 holding one pin P, and the adjacent sleeves 2 are connected to each other. Details will be described below with reference to FIGS.

  In order to specify the shape and the like of the strip 1, it is necessary to specify the viewing direction. In the following description, the direction orthogonal to the axis and the arrangement direction of the sleeves 2, that is, the arrow F in FIG. 1 and a direction orthogonal to the paper surface in FIG. 1B is defined as a front view direction, and the terms “front and rear”, “up and down”, and “left and right” are used based on this direction. The strip 1 has a symmetric shape and a symmetric shape.

  2A is a side view of the strip 1, FIG. 2B is a cross-sectional view taken along the line IIB-IIB in FIG. 1A, FIG. 2C is a cross-sectional view taken along the line IIC-IIC in FIG. (A) is a partial front view with the pin P fitted in, (B) is a cross-sectional view taken along the line IIIB-IIIB in FIG. 4 are sectional views corresponding to the AA view, the BB view, the CC view, the DD view, and the EE view of FIG. Needless to say, the pin P used in this embodiment includes a shaft P1 and a head P2, as shown in FIG. 3A, and the tip of the shaft P1 is pointed. In some shafts P1, the tip side has a small diameter and the base end side has a large diameter (step difference).

  The sleeve 2 includes a first annular portion 3 located on the head side of the pin P, a second annular portion 4 located on the opposite side, and an intermediate portion 5 that connects the two, and the second annular portion 4. The left and right two feet 6 are projected downward at the lower end of the. For this reason, the two right and left legs 6 are bifurcated.

  Further, the intermediate portion 5 is formed with recesses 7 recessed in the front and rear sides, so that the front and rear thicknesses are thinner than the annular portions 3 and 4, and the insertion hole 8 of the pin P is formed in the intermediate portion 5. A window hole 9 that communicates with the intermediate portion 5 is vacant, so that the intermediate portion 5 is in the same state as if it were composed of two left and right pillars. Due to the presence of the window hole 9, the axis P1 of the pin P is partially exposed to the outside. The upper part of the recess 7 of the intermediate part 5 is formed in an arc shape in a side view, and the upper part of the window hole 9 has an inverted V shape in a front view. For this reason, it is easy to break. Accordingly, the window hole 9 also functions to promote the vertical division of the first annular portion 3. In addition, the recess 7 can be formed in an angular shape in a side view.

  The substantially upper half of the first annular portion 3 is formed in a circular shape in plan view, and as shown in FIGS. 2 (B) and 3 (B), the inner peripheral surface has an inner diameter from the bottom to the top. Is a tapered portion 10 that expands. In other words, the inside of the first annular portion 3 is a tapered hole. The inner diameter of the upper end of the taper portion 7 is set to be substantially the same as or slightly smaller than the outer diameter of the head P2 of the pin P (may be slightly larger). Although the taper portion 10 extends to the upper end of the intermediate portion 5, a straight portion that firmly holds the shaft P <b> 1 of the pin P can be formed at the lower portion of the first annular portion 3.

  Both front and rear surfaces of the lower half of the first annular portion 3 are inclined surfaces 11 that are tilted toward the recess 7 in a side view. Of the lower half of the first annular portion 3, the left and right side portions of the inclined surface 11 are the same flat surfaces as the front and rear surfaces of the intermediate portion 5 (therefore, the boundary between the first annular portion 3 and the intermediate portion 5 is not necessarily limited). Although it is not clear, this does not deny the establishment of the present invention.)

  Although the inclination angle of the inclined surface 11 is set to be the same as the inclination angle of the taper portion 10, a different angle may be used. For example, as can be easily understood from FIGS. 3 (A) and 4 (B), the left and right middle portions of the front and rear surfaces of the first annular portion 3 have a flat cross-section V shape (even in U shape) as part of the vertically dividing means. A good) upper longitudinal groove 12 is formed.

  A V-shaped upper end surface notch 13 that opens upward in a front view is formed on the front and rear upper surfaces of the first annular portion 3. The upper end surface notch 13 is also part of the vertically dividing means, and the lower end thereof is close to the upper end of the upper longitudinal groove 12 (the longitudinal groove 12 and the upper end surface notch 13 may be connected).

  The first annular portions 3 of the adjacent sleeves 2 are connected via a first bridge portion 15 having a small front-rear thickness. In this case, a notch 16 that is open upward in a side view angle (other shape may be used) is formed on both left and right sides of the first conversion, and a lower portion of the notch 16 is formed as a first bridge portion 15. Yes. This is because when the pin P is driven out, shear stress is effectively concentrated on the first bridge portion 15 to improve the tearing. As shown in FIG. 4B, the lower end surface of the first bridge portion 15 is formed in an inverted V shape in front view, but may be flat.

  In the present embodiment, the outer diameter of the first annular portion 3 in a plan view is circular, but other shapes such as an octagon, a hexagon, etc., or a left-right longitudinal ellipse can also be adopted. The tapered portion 10 has a conical shape, but may be formed in a pyramid shape such as a hexagonal shape or an octagonal shape in plan view.

  Next, the second annular portion 4 will be described. The basic shape of the second annular portion 4 is a circular ring shape on both the outer periphery and the inner periphery, and the shaft P1 of the pin P is fitted (held) into the pin insertion hole 8 exactly. Then, as a part of the vertically dividing means, the second annular portion 4 is formed with a U-shaped slit groove 17 that opens outwardly on both front and rear surfaces (which may be V-shaped or rectangular). Similarly, an inverted V-shaped (may be U-shaped or square-shaped) lower surface notch 18 is formed on the lower surface of the portion between the inner peripheral surface and the vertical dividing means.

  In addition, the left and right foot bodies 6 are vertically long on the left and right outer surfaces, but the opposing surfaces are inclined surfaces 6a whose intervals increase from top to bottom. The left and right feet 6 are set to have a cross-sectional area that has such a rigidity that it does not bend and deform even when it hits a workpiece.

  The second annular portions 4 of the adjacent sleeves 2 are integrally connected by a second bridge portion 19. V-shaped grooves are formed on the upper surface and the lower surface of the second bridge portion 19 in front view, but may be flat.

  Also for the second annular portion 4, the basic outer shape of the outer periphery can be formed in another shape such as an octagon or a hexagon, or a left-right longitudinal ellipse, and the pin insertion holes 8 are formed in six. It can also be formed in a pyramid shape such as a square or octagon.

(2) Action Next, the action will be described with reference to FIG. The method of using the connecting pin according to the present embodiment is the same as the conventional method. The connecting pin is loaded into the magazine of the driving tool, and the tip (nose) of the head of the driving tool is pressed against the workpiece W to lock the safety. Release the trigger in that state. Then, the rod R of the driving tool moves forward, the pin P positioned at the head of the connecting pin is pushed out by the rod R, and the workpiece W is fixed by the pin P entering the workpiece W and the base material B. .

  In this driving process, the pin P enters the workpiece W and the base material B with its head P2 in contact with the upper surface of the first annular portion 3, and then the foot 6 hits the front of the workpiece W. Then, the sleeve 2 is subjected to an axial clamping action (axial compression action) by the head P2 of the pin P.

  Then, when the head P2 of the pin P enters the taper portion 10 of the first annular portion 3, the first annular portion 3 is subjected to the action of spreading radially outward, but stress is applied to the upper end notch 13 and the upper longitudinal groove 12. By concentrating at the location, the first annular portion 3 is broken and vertically divided at the location of the upper longitudinal groove 12 and separated to the left and right.

  On the other hand, since the foot 6 has the inclined surface 6a, the left and right feet 6a are spread apart so as to be separated from each other. Therefore, stress concentrates on the lower notch 18, and as a result, The 2nd annular part 4 will be in a crotch tear state, it will fracture | rupture in the location of the slit groove 17, and will divide into two right and left. Thus, since the first annular portion 3 and the second annular portion 4 are simply vertically divided, the sleeve 2 is surely separated from the pin P and the workpiece W as shown in FIG. (Scatter).

(3). Other Embodiments FIG. 6 shows another embodiment. (A) is a longitudinal side view, (B) is a plan view of (A), and (C) is a sectional view taken along the line CC of (A). This embodiment is basically the same as the first embodiment. The difference from the first embodiment is that the upper vertically long groove 12 is formed in the tapered portion 10 as a part of the vertically dividing means of the first annular portion 3. And a slit groove 17 is formed in the form of opening inward as a vertical dividing means of the second annular portion 4.

(4). Others The present invention can be embodied in various ways other than the above embodiment. For example, the recess 7 and the window hole 9 in the illustrated embodiment are formed for the purpose of applying the pin P to the guide rail of the magazine, but when such a function is not necessary, the recess or the window hole is formed. Is not always necessary.

  It is also possible to form the sleeve 2 into three parts by providing three legs at three locations at equal intervals in the circumferential direction to form a trifurcated shape. Further, the sleeve does not necessarily need to be split into a plurality of pieces, and can be separated from the pins and the workpiece by breaking at only one place to form a non-loop state. Further, in the illustrated strip, the sleeves are arranged with their upper and lower surfaces aligned, but it is also possible to arrange adjacent sleeves in a state where they are slightly shifted in the axial direction.

It is a figure which shows the top view, front view, and bottom view of a strip which concern on this embodiment. (A) is a side view of the strip, (B) is a cross-sectional view taken along line IIB-IIB in FIG. 1 (A), and (C) is a cross-sectional view taken along line IIC-IIC in FIG. 1 (A). (A) is a partial front view with the pin P assembled, (B) is a cross-sectional view taken along the line IIIB-IIIB in FIG. 1 (A) with the pin indicated by a one-dot chain line. Cross-sectional view of FIG. 3, (A) is a cross-sectional view taken along AA, (B) is a cross-sectional view taken along BB, (C) is a cross-sectional view taken along CC, (D) is a cross-sectional view taken along DD, and (E) is a cross-sectional view taken along EE It is. It is a figure which shows an effect | action. It is a figure which shows other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Strip 2 Sleeve 3 1st cyclic | annular part 4 2nd cyclic | annular part 5 Intermediate | middle part 6 Foot 7 Middle part recessed part 9 Window hole 10 Tapered part 12 Upper vertical groove

Claims (3)

A large number of sleeves into which a single headed-in type fastener is fitted are arranged in parallel, and adjacent sleeves are connected via a bridge portion that is torn off by the punching of the fastener. Is a strip that forms vertical dividing means for separating from the fastener by being clamped between the head of the fastener and the workpiece,
The vertically dividing means is formed such that a portion of the inner peripheral surface of the sleeve located on the fastener head side is formed into a tapered portion whose inner diameter increases toward the outer periphery of the fastener head, and on the side of the sleeve that contacts the workpiece. It has at least one of forming a plurality of legs that expand in a crotch shape by the pinching pressure,
Drive-in fastener retention strip. Each sleeve is positioned between a first annular portion having a tapered portion, a second annular portion in which two legs project in a bifurcated state, and between the first annular portion and the second annular portion. The middle part,
The intermediate portion is recessed in the front and rear sides in a front view seen from a direction orthogonal to the axis of the sleeve and the arrangement direction of the sleeves, and a window hole in which the pin is exposed is opened in the front and rear.
The legs of the second annular portion are arranged on the left and right sides in the front view,
Furthermore, the first annular portion and the second annular portion are formed with a thin portion that becomes a fracture surface when the two annular portions are divided into left and right by the front view,
The drive-in fastener holding strip according to claim 1.   A coupling fastener comprising a drive-in fastener fitted and held in each sleeve of the strip according to claim 1 or 2.

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