JP4745906B2 - Connecting screw - Google Patents

Description

The present invention relates to connecting screw a number of screws are held in the root Ji holder.

In order to be able to continuously drive self-drilling screws such as milled screws and drill screws, a large number of screws are attached to a long screw holder to form connecting screws. . There are several types of screw holders, but one type is a belt type.

  That is, in this belt type, the screw is fixed to the holding body by making holes in the belt-shaped resin holding body into which the screw shaft fits at regular intervals, and by closely contacting the seat surface of the screw head to the holding body. It is held in an upright posture with respect to the wide surface. Notches are formed at both longitudinal edges of the screw holder at intervals of screw arrangement so that the screw holder can be loaded into the driver tool to enable intermittent feeding. In this type of screw coupling body, the head of the screw is protruded from the screw holding body by a driver bit at an early stage of the screwing process.

In this belt type screw holder, the upright holding ability of the screw and the ease of protruding the head of the screw can be cited as quality factors, but they are in a contradictory relationship. In view of this, various proposals have been made in order to achieve both improvement in the upright retention of the screw and ease of protruding the screw. For example, Patent Documents 1 and 2 describe that a screw holding body is integrally formed with a cylindrical portion that grips a root portion of a screw, and the cylindrical portion has a strength that allows the screw head to penetrate.

Further, Patent Document 3 discloses a structure in which the screw holder has a two-layer structure of a main body sheet and a coating layer overlapping therewith, and the top surface of the screw is pressed by the coating layer. Further, Patent Document 4 relating to the application of the present applicant discloses that the entire or most of the screw holder is made of paper, and that a holding portion for gripping the screw shaft is provided integrally. Patent Documents 1 and 2 also relate to the application of the present applicant.

On the other hand, a driver tool in which this type of screw holder is used includes a cylindrical case having a driver bit and a slider slidably fitted in the case, and the slider is loaded with the screw holder. Furthermore, the slider is urged in the forward direction by a spring, and the screw holder is intermittently fed in conjunction with the slider moving back and forth with respect to the case ( For example, Patent Document 5). In this case, those screw retaining member is sent when the slider is advanced by the spring and advances the case against the front end of the slider on the surface of the workpiece (to relatively retract the slider) stroke initially screw retaining member Is sent.

In any case, the screw head protrudes from the screw holder with the screwdriver bit when screwing, but the inner diameter of the screw holding hole in the screw holder is basically the same as the outer diameter of the screw. inner diameter smaller damage than the outer diameter of the driver bit, when screwing driver bit ends is retracted, screw retaining member had to act as resistance against retraction of the driver bit.
Japanese Utility Model Publication No. 4-49367 Utility Model Registration No. 2593069 Japanese Utility Model Publication No. 48-16051 JP 2002-168218 A JP-A-7-256564

  If it comprises like patent document 3, since the head of a screw is pinched | interposed by the main body sheet | seat and the coating layer, it can be said that the uprightness of a screw can be improved. However, in Patent Document 3, since the driver bit is engaged with the screw head by breaking the coating layer with the driver bit, there is a possibility that the driver bit may not fit into the engagement hole of the screw head. For this reason, there is a problem of lack of certainty of screwing. Further, if the resistance when the screw head is protruded with the driver bit is large, the holding body may be detached from the loading portion (guide groove) of the driver tool.

The present invention has been made in order to improve such a situation, in particular, provides a connecting screw consisting of a screw and the coercive bearing member which forms a periphery of the head and the flat (flat) flanges It is something to be done.

The present invention relates to a connection screw, and the connection screw includes a plurality of screws arranged in parallel and a belt-like screw holder for holding the plurality of screws in an aligned state. The screw used in the present invention is a self-drilling type, and has a head integrally provided at the base end of the shaft on which the thread is formed, and the head has an outward recess whose outer diameter increases as it approaches the top surface. A trumpet- shaped portion is formed, and an engagement hole into which a driver bit is fitted is formed on the top surface of the head, and the outer peripheral edge portion of the head of each screw is formed outside the trumpet-shaped portion. The flat flange is located.

Then, the screw holder is provided with a top side security band sandwiching the outer peripheral portion from front and rear sides and the seat surface side security band head before Symbol number of screws which are arranged, two holding band, a width to completely cover the head of the separating non retained which do Rutotomoni screws equal width, the portion corresponding to the respective screw of the top side holding band is larger than the outer diameter of the driver bit diameter or substantially bit insertion hole of the same diameter as the sky vignetting, at portions corresponding to the respective screw of the seat surface side holding band, protrudes hole for passing the head of the screw and the bit insertion hole and drilled concentrically, the inner peripheral edge of the projecting hole of the seat surface side holding band, and supporting supporting pieces that Do heavy on the seating surface of the outer peripheral edge portion of the head is formed in each of the screws, each the support pieces, has become a deformable strength so that the head of the screw may pass, further, the two holding To form a engaging portion for transmitting intermittently at arrangement intervals of the screw is loaded into the driver tool.

The present invention has the above basic structure. In the invention of claim 1, in the above basic structure, the top surface side holding band and the seat surface side holding band have the same thickness over the entire length, and the seat surface side The support piece that overlaps the flange portion of the head of the screw is formed on the inner peripheral edge of each protruding hole in the holding band so as to be pushed and bent to the opposite side of the top side holding band.
According to a second aspect of the present invention, in the basic configuration described above, the seating surface side holding band has an equal thickness over the entire length and is thicker than a flange portion of a head of the screw. Moreover, the support piece that overlaps the flange portion of the head of the screw is formed by thinning the seating surface side holding band.

  According to the present invention, since the head of the screw is sandwiched between the top surface side holding band and the seat surface side holding band, the function of holding the screw in an upright posture is remarkably improved. In addition, since the bit insertion hole of the top surface side holding band is larger than or substantially the same as the outer diameter of the driver bit, resistance to back and forth movement of the driver bit increases due to the provision of the top surface side holding band. There is nothing.

  Furthermore, when projecting the head of the screw, it is only necessary to deform the support piece of the bearing surface side holding band (elastic deformation or plastic deformation). For example, it is not necessary to pierce the cylindrical portion, so the driving resistance is small. As a result, it is possible to prevent the holding body from being removed from the guide groove of the driver tool and to perform the screwing operation easily.

  As described above, according to the present invention, it is possible to easily remove the screw head from the holding body (protrusion) while improving the uprightness of the screw.

  By the way, there is a kind of screw type wood screw. One of the uses of this wood screw is to fasten a gypsum board as a building interior material to a frame material (base material). And a driver tool loaded therewith are often used for fastening gypsum boards. And as for the screw for gypsum board fastening, what the seat surface of the head is formed in the trumpet shape is often used. This is because the trumpet-shaped head is easy to squeeze the whole into the gypsum board, and the gypsum board has a higher pressing function than the countersunk head (the whole screw head is fitted to the gypsum board). The reason for this is to improve the finish when wallpaper is applied to the surface of the plasterboard.)

  In recent years, however, gypsum boards tend to be brittle. This is presumably because the ratio of recycled products to the raw material of gypsum board is increasing due to progress of recycling, and as a result, the bonding force between particles is reduced. If the gypsum board becomes brittle, it is understood that the number of screws to be used should be increased in order to ensure the necessary fastening strength, but this will reduce the efficiency of the fastening operation. On the other hand, the inventor of the present application forms a thin flat flange portion on the head of the screw so that the outer diameter of the screw head is larger than that of the conventional one (for example, about 2.5 to 3 times the nominal diameter). For example, they discovered the fact that the necessary fastening strength can be secured without increasing the number of screws.

The present invention is suitable to hold the screw that forms the thin disk-shaped flange portion an outer peripheral portion of the head as described above, stability suitable screws for fastening of the gypsum board It can be kept in a state of being easily and easily removed.

Next, an embodiment of the present invention will be described with reference to the drawings. First, it will be described with reference to FIG. 5 an embodiment of a screw (screws).

(1). Embodiment of Screw In FIG. 5 , (A) is a front view of the screw, and (B) is a plan view. The screw 1 is composed of a shaft 2 and a head 3 provided at the base end thereof, and the tip portion of the shaft 2 is a tapered portion 2a having a sharp tip. Further, a portion (straight portion) of the shaft 2 excluding the tapered portion 2a is formed in a stepped manner by a small diameter portion 2b continuous to the tapered portion 2a and a large diameter portion 2c continuous to the head 3. Has been.

  The tapered portion 2a and the small diameter portion 2b are formed with two threads of a first thread 4 and a second thread 5, and only the first thread 4 extends in the large diameter portion 2c. ing. Accordingly, the tapered portion 2a and the small diameter portion 2b are double threaded portions, and the large diameter portion 2c is a single threaded portion. In the small diameter portion 2b, the height of the first screw thread 4 is higher than the height of the second screw thread 5. The starting end of the first screw thread 4 is located at the forefront of the tapered portion 2a, and controls the work of introducing the bite into the workpiece.

The head 3 of the screw 1 is composed of a trumpet- shaped portion 3a that is continuous with the shaft 2 and increases in outer diameter as it approaches the top surface, and a flange portion 3b that projects from the outer peripheral end of the trumpet- shaped portion 3a. A cross hole 6 as an example of an engagement hole into which a driver bit is fitted is formed in a portion corresponding to the trumpet- shaped portion 3a in the top surface of the. The trumpet- shaped portion 3a has an outwardly concave profile . The flange portion 3b is formed in a disk shape having the same thickness throughout.

The maximum outer diameter D1 of the screw portion (the large diameter of the first thread 4 in the large diameter portion 2c of the shaft 2 and generally synonymous with the nominal diameter of the screw), the maximum outer diameter D2 of the trumpet- shaped portion 3a in the head 3, and The relationship between the outer diameter of the flange portion 3b of the head 3 (in other words, the outer diameter of the head 3) D3 is approximately twice D2 and D3 is approximately 2.5 to 3 times D1 (in the drawing). D3 is drawn about 3 times D1.) Further, the thickness of the flange portion 3b is set to about 0.5 to 0.8 mm (this thickness dimension is substantially constant regardless of the nominal diameter of the screw 1).

The entire top surface of the head 3 can be recessed with a gentle curvature, and only the portion corresponding to the trumpet- shaped portion 3a of the top surface of the head 3 can be recessed with a gentle curvature. . In addition, it is possible to select a form that is not a cross hole 6 such as a square or hexagonal engagement hole or a star shape.

In FIG. 5 (C) shows an example of the state of use of a screw 1. In this use example, the gypsum board 7 is used for fastening to a U-shaped thin steel plate frame material (base material) 8. The frame material 8 has a thickness of about 0.5 to 0.8 mm. In recent houses (buildings), a frame material 8 made of a thin steel plate is used instead of the conventional wooden frame material in terms of fire resistance and corrosion prevention. It has been heavily used.

  A cover 9 and a backing paper 10 are pasted on the gypsum board 7, and with the gypsum board 7 fastened, the head 2 of the screw 1 is entirely inside the gypsum board 7 (more precisely than the surface of the cover 9). (Inward). Accordingly, the portion of the cover 9 that overlaps the head 3 is also pushed into the thick portion of the gypsum board 7.

The head of a conventional gypsum board fastening screw is almost the same as the present embodiment in which the flange portion 3b does not exist. For this reason, if the gypsum board 7 is brittle, the gypsum board 7 is crushed and it is difficult to obtain the required fastening strength. was there. For this point, to display the dashed line 3c in FIG. 5 (A), it is conceivable to a larger diameter across the head 3 remains trumpet-shaped. However, in this case, since the volume of the head 3 becomes excessively large, the gypsum board 7 is largely crushed and does not contribute much to the improvement of the fastening strength.

On the other hand, in the screw 1 of this embodiment , since the flange portion 3b is thin and flat (thin disc shape), the volume of the head 3 is not excessively increased. The flange portion 3b is flat and the gypsum board 7 is flat. The cover 9 has little action to crush the gypsum board 7 because it can only be pushed from the surface side, and the cover 9 does not break the portion of the cover 9 that overlaps the flange portion 3b. The effect that the crushing of 7 is further suppressed is synergistic, and high fastening strength can be secured.

(2). First embodiment of screw holder (FIGS. 1 and 2)
Next, an embodiment of a screw holder according to the present invention will be described. First, a first embodiment will be described with reference to FIGS. 1A is a partially broken plan view, FIG. 1B is a partially broken front view, FIG. 1C is a sectional view taken along the line CC of FIG. 2A, and FIG. (B) is a sectional view showing a driving state.

  The screw holder 11 includes a top surface side holding band 12 that overlaps the top surface of the head 3 in the screw 1 and a seat surface side holding band 13 that overlaps the seat surface of the head 3 in the screw 1. By holding the head 3 of the screw 1 between the holding band 12 and the seating surface side holding band 13, the screw 1 is held upright from the wide surface of the screw holding body 11. Both the top surface side holding band 12 and the seat surface side holding band 13 are made of the same kind of synthetic resin sheet having flexibility and have the same width and the same thickness, and both are integrated by adhesion or welding. Yes.

A number of bit insertion holes 15 are formed at a predetermined interval in the top surface side holding band 12, while a group of protruding holes 16 concentric with the bit insertion hole 13 is formed in the seat surface side holding band 13. A support piece 17 is formed on the inner peripheral edge of the protruding hole 16 so as to overlap the seating surface of the flange portion 3b of the head 3 of the screw 1. The bit insertion hole 15 is set to have a diameter larger than the outer diameter of the driver bit 14 and smaller than the minimum diameter of the flange portion 3b of the head 3 in the screw 1 (in other words, the maximum outer diameter of the trumpet-shaped portion 3a ). (in a state that does not interfere with the driver bit 14, as far as possible small diameter is preferred.).

  In the present embodiment, the support piece 17 is formed by partially denting (or pushing and bending) the seating surface side holding band 13. The support pieces 17 are divided into four slits (grooves) 18 extending in the radial direction, and four support pieces 17 are formed. The pair of support pieces 17 are opposed to the longitudinal direction and the width direction of the holding bands 12 and 13. Arranged in a state. The reason why the support pieces 17 are arranged in this way is to form the slits 18 with the arrangement interval of the screws 1 as small as possible.

The diameter of the inscribed circle of the support piece 17 is set larger than that of the bit insertion hole 15, so that the driver bit 14 does not interfere with the support piece 17. In the present embodiment overlaps only the flange portion 3b of the head 3 in the support piece 17 screws 1, it is also possible overlap with La Celle to a part of the trumpet-shaped portion 3a (however, the drivers in this case bit 14 It is preferable to set so as not to interfere with. Further, when the support piece 17 is difficult to bend and deform, it is possible to provide weakening means such as forming a notch 20 on the bottom surface of the base portion of the support piece 17 as shown by a one-dot chain line in FIG. (Of course, it is necessary not to sacrifice the upright holding function of the screw 1).

  As an example of an engaging portion that is loaded into a driver tool (continuous screwing device) and is intermittently sent (fed out) on both longitudinal edges of the screw holder 11, the notches 19 are spaced at the same interval as the arrangement interval of the screws 1. It is formed with. The notch 19 is formed at an intermediate position between the adjacent bit insertion holes 15.

  As described above, the top surface side holding band 12 and the seat surface side holding band 13 are integrated so as not to be separated by adhesion or welding. In this case, the top surface side holding band 12 and the seat surface side holding band 13 It is not necessary to bond or weld the entire superposed portion. For example, it is possible to bond or weld in a flying state, or to bond or weld only the longitudinal side edges in a line.

  It is preferable that the screw holder 11 has appropriate flexibility so as to be wound in a spiral shape. Holding the screw holder 11 with appropriate flexibility can be realized by adjusting the material and thickness of the top surface side holding band 12 and the seat surface side holding band 13, or as shown in FIG. As shown by a two-dot chain line at the right end, it can also be realized by forming a weakening means such as a notch 21 or a slit at a portion sandwiched by the notches 19 facing each other (the weakening means is formed on the top side holding belt 12 and the seat. It may be formed on both the surface side holding band 13 or only one of them.)

  In the above configuration, since the head 3 of the screw 1 is sandwiched between the top surface side holding band 12 and the support piece 17, the screw 1 is held in an upright posture with respect to the screw holding body 11. In particular, since the flat top surface of the head 3 overlaps the top surface side holding belt 12 over the entire circumference, the posture stability of the screw 1 is remarkably increased. As a result, only the flange portion 3b is supported by the support piece 17. Even in the pressed state, the screw 1 is held in an upright position (the flange portion 3b is held in an upright position even when lightly pressed by the support piece 17 because the flange portion 3b has a large outer diameter).

  The use method of the connecting screw in which the screw 1 is planted on the screw holder 11 is the same as the conventional method. As shown in FIG. 2 (B), the longitudinal side edges of the screw holder 11 to which the screw 1 is attached are attached to the driver tool. With the tip of the driver tool applied to the surface of the workpiece (gypsum board 7), the driver bit 14 is rotated and engaged with the cross hole 6 of the head 3 of the screw 1 and pushed in. It will be.

  In this state of use, the driver bit 14 does not interfere with the top surface side holding band 12 and the seating surface side holding band 13, and the head of the screw 1 can be removed from the screw holding body 11 only by pushing and bending the support piece 17. Since the screw 1 is pushed out, the resistance when the screw 1 is pushed out can be small. Therefore, the entire screw holder 11 is not bent and deformed and is not detached from the guide groove 22 of the driver tool. Work can be done lightly with light force.

When the outer diameter of the head 3 is larger than the conventional one like the screw 1 of this example, the edge of the flange portion 3b is inclined when the driving posture of the screw 1 is slightly inclined with respect to the line perpendicular to the surface of the gypsum board 7. The screw holder 11 of the present invention can hold the screw 1 in an upright posture with respect to the screw holder 11, so the screw 1 covers the entire flange portion 3 b. Ru can be screwed into a state in which sink into the gypsum board 7.

  As a method of holding both holding bands 12 and 13 inseparably, as shown in FIG. 1D, one holding band is pressed with a punch and the protrusion 12b is pushed into the thick part of the other holding band. (A technique similar to “half-pressing” used for joining metal plates) can also be used. In this case, the bulging portion 13b may be formed in the other holding band. Other fixing methods include a method of forming a eyelet portion in one holding band and fitting it into a hole formed in the other holding band, and fastening with a rivet-like fastener.

(3). Other embodiments (FIGS. 3 to 4 )
Next, FIG. 3, another embodiment will be described with reference to FIG.

FIG. 3 shows another example of the form of the support piece 17. Among these, in 2nd Embodiment shown to FIG. 3 (A), the adjacent support piece 17 is parted by the square (or rhombus) hole 23. Accordingly, the side surfaces of the support pieces 17 extend in parallel, and thus the support pieces 17 are easily deformed.

In the third embodiment are shown in FIG. 3 (B), the by forming a number of cutting lines 24 extending radially on the seat surface side security band 13, forms a plurality of support pieces 17 which are separated from each other. A small hole 25 is formed at the base end of the cutting line 24. The support piece 17 is easily deformed as its width dimension is reduced. Further, when the small hole 25 is provided, the support piece 17 is further easily deformed.

In the fourth embodiment shown in FIG. 4A , the seat surface side holding band 13 is made thicker than the flange portion 3b of the head 3 of the screw 1 and the inner peripheral edge of the seat surface side holding band 13 is thinned. A support piece 17 is formed.
On the other hand, FIG. 4B shows a reference example, in which the bearing surface side holding band 13 is left flat and a support piece 17 is formed thereon, while the top surface side holding band 12 has a screw. A pressing portion 12a that covers one head 3 is formed to bulge. In both (A) and (B), it is preferable to form a plurality of support pieces 17 along the circumferential direction.

(4). Others The present invention can be embodied in various ways other than the above embodiment. For example, the material constituting the roots Ji holder is not limited to the use of the resin sheet, it is also possible to use paper Waterproof. It is also possible to change the material of the constituent members such that the top side holding band 12 is made of paper and the seat side holding band 13 is made of resin.

Contact name The driver tool part for feeding the screw holder is the type (dedicated machine) provided integrally, but a portion for feeding the screw holder is a type to be mounted in retrofit, referred to in this application, "Driver “Tool” includes both.

It is a figure which shows the structure of 1st Embodiment. It is a figure which shows the structure and use condition of 1st Embodiment. It is a figure which shows 2nd , 3rd embodiment. It is a figure which shows 4th Embodiment and a reference example . It is a figure which shows embodiment of a screw .

1 Screw 2 Shaft 3 Head 3a Trumpet 3b Flange 4,5 Thread
6 Cross hole (engagement hole)
DESCRIPTION OF SYMBOLS 11 Screw holder 12 Top surface side holding band 13 Seat surface side holding band 14 Driver bit 15 Bit insertion hole 16 Protrusion hole 17 Supporting piece 22 Guide groove of driver tool

Claims (2)

It consists of a large number of screws arranged in parallel and a belt-shaped screw holder that holds the multiple screws in a lined state.
The screw is self-piercing and has a head integrally provided at the base end of the shaft on which the thread is formed, and the head has an outwardly concave trumpet-like portion whose outer diameter increases as it approaches the top surface. An engaging hole into which a driver bit is fitted is formed on the top surface of the head, and the outer peripheral edge of the head of each screw is a flat flange positioned outside the trumpet-shaped portion. On the other hand,
The screw holder includes a top surface side holding band and a seat surface side holding band that sandwich the outer peripheral edge portions of the heads of the multiple screws arranged from both the front and back sides, and both holding bands have equal widths. It is a width dimension that is held inseparable and completely covers the head of the screw, and the portion corresponding to each screw in the top surface side holding band has a diameter larger or smaller than the outer diameter of the driver bit. A bit insertion hole having the same diameter is formed, and a protruding hole for allowing the head of the screw to pass through is concentric with the bit insertion hole at a portion corresponding to each screw in the bearing surface side holding band. And a support piece is formed on the inner peripheral edge of each protruding hole in the seating surface side holding band and overlaps with the seating surface of the outer peripheral edge portion of the head of each screw. Is deformable enough to pass through,
Furthermore, an engaging portion is formed on both the holding bands to load the driver tool intermittently and send it at intervals of the screw.
The structure
The top surface side holding band and the seat surface side holding band are equal in thickness over the entire length, and the support piece overlaps the inner peripheral edge of each protruding hole in the seat surface side holding band and the flange portion of the head of the screw. Is formed in a state of being pushed and bent to the opposite side of the top surface side holding band,
Connecting screw . It consists of a large number of screws arranged in parallel and a belt-shaped screw holder that holds the multiple screws in a lined state.
The screw is self-piercing and has a head integrally provided at the base end of the shaft on which the thread is formed, and the head has an outwardly concave trumpet-like portion whose outer diameter increases as it approaches the top surface. An engaging hole into which a driver bit is fitted is formed on the top surface of the head, and the outer peripheral edge of the head of each screw is a flat flange positioned outside the trumpet-shaped portion. On the other hand,
The screw holder includes a top surface side holding band and a seat surface side holding band that sandwich the outer peripheral edge portions of the heads of the multiple screws arranged from both the front and back sides, and both holding bands have equal widths. It is a width dimension that is held inseparable and completely covers the head of the screw, and the portion corresponding to each screw in the top surface side holding band has a diameter larger or smaller than the outer diameter of the driver bit. A bit insertion hole having the same diameter is concentrically formed with each screw, and a protruding hole for allowing the head of the screw to pass therethrough is provided in the portion corresponding to each screw in the bearing surface side holding band. A support piece is formed on the inner peripheral edge of each protruding hole of the seating surface side holding band and overlaps with the seating surface of the outer peripheral edge of the head of each screw. Is strong enough to allow the head of the screw to pass through,
Furthermore, an engaging portion is formed on both the holding bands to load the driver tool intermittently and send it at intervals of the screw.
The structure
The supporting surface side holding band has an equal thickness over the entire length and a thickness thicker than a flange portion of the head of the screw, and the support surface overlaps the flange portion of the head of the screw. The piece is formed by thinning the seating surface side holding band,
Connecting screw.

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