JP2007278350A - Panel mounting bolts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide panel mounting bolts capable of fixing a panel by simply and reliably screwing a nut to the panel mounting bolts without processing the panel at the site and factory.
SOLUTION: Panel mounting bolts for passing through a panel with respect to a mounting position of a fixing bracket disposed in a structural frame, and the front end portions of the panel mounting bolts are substantially free of threads. It has a substantially conical shape that forms a smooth surface, and the shaft portion of the panel mounting bolts includes a screw portion that is screwed into a nut with the fixing bracket interposed therebetween.
[Selection] Figure 5 (a)

Description

  In the present invention, when fixing a relatively fragile panel such as a plate material or ALC to a structural frame, the bolts are driven without performing processing on the panel in advance at the site and factory. The present invention relates to panel mounting bolts that allow a nut to be securely screwed into a portion protruding from the rear surface of the panel.

  In general, panel mounting structures that fix panels used for building floors, roofs, etc. to building structures such as beams and pillars do not use complex parts, require a small number of parts, and do not require skill. Field work is desired. In particular, various mounting structures with high construction efficiency and high accuracy have been proposed using mounting screws.

  For example, in Patent Document 1, as shown in FIGS. 6, 7, and 8, as shown in FIGS. 6, 7, and 8, a cut-and-raised piece (resistive protrusion) 103 that bites into the surface of an ALC floor panel and becomes rotational resistance protrudes on the back surface. The floor plate is hooked on the floor frame using a fixing bolt B having a head plate portion 101 and a shaft portion 102 inserted into a bolt insertion hole 104 penetrating in the vertical direction of the floor panel. A mounting bracket for fixing the floor panel to the floor frame F by holding the floor panel P from above and below by the fixing bracket A and the head plate portion 101 disposed below the panel has been proposed.

  Further, in Patent Document 2, as shown in FIG. 9, a head 208 having a protruding portion 207 on the back surface and a screw portion 204 for screwing with a fastener are provided, and a lightweight cellular concrete panel is provided at the tip. As shown in FIG. 10, using mounting screws 201 having blades 205 penetrating into the panel, these mounting screws are driven from the surface of the panel P, and between the flange of the H-shaped steel beam and the back surface of the panel. There has been proposed a mounting structure in which a lightning bolt 211 is disposed and the screw portion 201 of the mounting screw protruding by the penetration is fixed by a fastener 209.

Further, as shown in FIG. 11, Patent Document 3 proposes a panel P that is fixedly attached to an H-shaped steel beam F via a mounting bracket 305 having a U-shaped cross section. As shown in FIG. 12, the mounting hardware 305 used for mounting and fixing includes a flat plate portion 305a and side plate portions 305b in which both side edges of the flat plate portion are bent and extended at right angles in the same direction. The plate portion has a configuration in which a notch 305c is formed in parallel to the flat plate portion from one end portion.
In this case, as shown in FIG. 13, an elongated concave groove portion 303 is formed on one side surface, and a mounting screw hole 304 is provided through the panel at a position corresponding to the concave groove portion. At this concave groove position, the notch of the mounting bracket is fitted into the flange F of the H-shaped steel beam. In this state, as shown in FIG. 11, a screw (drilling tapping screw) 302 is screwed through the panel mounting screw hole 304 and the flat plate portion 305a from the surface side of the panel, so that the panel is H-shaped steel beam. It is attached and fixed to the flange F.

  However, in the mounting structure described in Patent Document 1, it is necessary to provide mounting screw holes in the manufacturing factory in advance from the panel surface side, and there is a problem that panel processing equipment and the like are required and the cost is increased.

  Further, in Patent Document 2, when driving mounting screws to a panel, panel chips are generated by a blade installed at the tip of the mounting screws, and the panel chips are screwed on the mounting screws. There is a problem in that the attachment screws and the fasteners are not smoothly screwed by being stuck on and clogging.

  Further, in Patent Document 1, since the mounting screw hole is opened in advance, when the fixing bolt is tightened with a nut from below, the fixing bolt may be pushed up to the panel surface side and cannot be screwed. It is necessary to hold down the fixing bolt from the top, and it may be necessary to work by two workers in total, one worker up and down by fixing one place. Also in Patent Document 2, since the blade is installed at the tip of the mounting screw, when the mounting screw is driven into the panel, the thread portion is clogged with ALC cutting powder, There are cases where the screwing does not go smoothly and the mounting screws may rotate together. Even in this case, it may be necessary to work by a total of two workers one by one up and down, In addition to increasing the number of man-hours required for the work, the efficiency sometimes deteriorated.

Furthermore, in the mounting structure described in Patent Document 3, it is necessary to use a mounting hardware having a relatively complicated shape, and to previously form a recessed groove and a mounting screw hole in the panel in advance in the factory. There was a problem that the panel processing equipment was required and the manufacturing cost increased. If the grooves and mounting screw holes to be formed on the panel are processed in the field instead of at the factory, these processes directly affect the mounting accuracy, and dust is generated during processing. There is a problem that the labor is extremely large.
Further, in Patent Document 3, after the mounting hardware is fixed to the beam, the panel is placed, and a screw is driven from the surface of the panel over the mounting hardware, but the mounting hardware position cannot be seen from the panel surface. It is necessary to indicate the position of the mounting hardware in the length and width directions of the panel, and it is not possible to confirm whether the screw is securely driven into the mounting hardware when the screw is driven.
In addition, when installing a mounting hardware on a frame such as a beam, the position of the mounting hardware depends on the panel assignment, so it was necessary to pay attention to the mounting position of the mounting hardware during construction.
JP 2001-49778 JP 2004-11678 A JP 2000-273996 A

  The present invention has been made to remedy such problems. The panel is fixed by simply and securely screwing the nut to the panel mounting bolts without processing the panel at the site and factory. An object of the present invention is to provide panel mounting bolts that can be used.

  Therefore, the panel mounting bolts according to the present invention are panel mounting bolts for passing through the panel with respect to the mounting position of the fixing bracket disposed in the structural housing, and the panel mounting bolts The tip portion of the type has a substantially conical shape having a substantially smooth surface without a thread, and the shaft portion of the panel mounting bolts has a screw portion for screwing with the nut with the fixing bracket interposed therebetween. It is characterized by this.

  Further, other panel mounting bolts according to the present invention are panel mounting bolts for penetrating through the panel with respect to the mounting position of the fixing bracket disposed in the structural casing, The maximum diameter of the front end portion of the bolts does not exceed the peak diameter of the shaft portion of the panel mounting bolts.

  According to the panel mounting bolts according to the present invention, when the panel mounting bolts are driven into the panel, the tip is conical, and the conical surface has a smooth shape without protrusions or dents. Therefore, it is driven in a form that pushes the panel apart rather than cutting it while cutting the panel, so the amount of cutting powder generated when the panel penetrates is extremely small, and the screws installed on the shafts of the panel mounting bolts The clogging of the mountain is extremely reduced, and the nut can be easily and reliably screwed onto the panel mounting bolts protruding from the back of the panel.

In addition, according to the panel mounting bolts according to the present invention, when the mounting screws are driven into the panel, the panel powder hardly gets stuck in the male thread valley portion of the mounting screws. Even if it is clogged, the state of clogging is extremely small and the clogged chips are not compacted, so that the nut can be screwed reliably and easily.
As a result, when the nuts are screwed from below, the panel mounting bolts do not rotate around or come off, allowing only one worker from below to work, improving work efficiency. can do.

  Furthermore, according to the panel mounting bolts according to the present invention, the hole processing for inserting the panel mounting bolts, the processing of the notch for fitting the mounting hardware, etc., as in the conventional panel mounting structure, etc. When these processes are performed at the factory, the panel manufacturing cost can be reduced, and when processing at the site, the work in the process can be omitted and the work efficiency can be improved. In addition, since the generation of ALC cutting powder is extremely small, scattering of ALC cutting powder on site can be prevented, and the on-site environment can be kept in a good state.

  Further, according to the panel mounting bolts according to the present invention, since the mounting hardware is retrofitted, it is sufficient to drive the panel mounting bolts slightly outside the beam flange, so the panel mounting bolts are driven. There is no need for precise positioning, and it is possible to reduce the work of inking, etc. Furthermore, since it is not necessary to install the mounting hardware according to the panel assignment in advance, the work is reduced and it is very Since it is possible to fix the panel by simple work, it is possible to work even if it is not specialized in panel erection and also in other craftsmanship, and it is expected to improve the work efficiency on site.

  Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a partially broken perspective view showing a configuration of an embodiment of a panel mounting structure using panel mounting bolts according to the present invention, and FIG. 2 is a panel mounting bolt according to the present invention. FIG. 3 is an enlarged view showing a tip end portion and a shaft portion of panel mounting bolts according to the present invention. Needless to say, the panel mounting bolts according to the present invention are not limited to these examples.

More specifically, the panel mounting bolts 3 according to the present invention, as shown in FIGS. 1 and 2, after the panel 1 is arranged on the upper flange portion 2 a of the H-shaped steel beam 2, To about the position where the fixing bracket 5 is disposed. Next, the panel mounting bolts 3 projecting from the back surface of the panel 1 are fastened with nuts 4 with the fixing metal fitting 5 interposed therebetween.
In addition, when giving a horizontal direction intensity | strength to an attaching part, what is necessary is just to weld this fixing metal 5 and the back surface of this upper flange 2a after the said construction.

  3 (X) and 4 (Y) show the panel mounting bolts 3 according to the present invention, which are composed of a tip portion 3a and a shaft portion 3b.

Here, as shown in FIGS. 3 (a) and 3 (b), the tip of the mounting bolts according to the present invention needs to have a substantially conical shape having a substantially smooth surface without any thread. is there.
Because, as shown in FIG. 3 (c) and FIG. 3 (h), a protrusion is provided at the tip, as shown in FIG. 3 (d) and FIG. 3 (f), a blade is provided at the tip, As shown in FIG. 3 (g) and FIG. 3 (h), the tip is uneven, for example, a cut is made or a screw thread is installed as shown in FIG. 3 (g) and FIG. 3 (e). Then, when panel mounting screws are driven into the panel, the protrusions are crushed and cut into the panel, and at that time, cutting powder is generated at the tip, resulting in the result. This is because, when penetrating the panel, the above-mentioned cutting powder is clogged in the valley of the thread of the shaft protruding from the back of the panel, and when the nut is screwed, this cutting powder disturbs and cannot be screwed. (Example 1 shown in FIG. 5A, Example 2 shown in FIG. 5B, and Comparative example shown in FIG. 5C) See.). In addition, as shown in FIGS. 3 (a) and 3 (b), the tip portion is formed in a substantially conical shape having a substantially smooth surface without a thread, so that the panel mounting bolts are driven. Since the cutting powder is extremely small, it is possible to prevent scattering of the cutting powder at the site, and the site environment can be kept good.
Moreover, the axial part of the panel mounting bolts which concern on this invention needs to consist of a screw thread for screwing together with a nut through the said fixing metal fitting.
This is because, in the present invention, when fixing the panel, the panel is fixed by tightening a nut with a fixing bracket interposed between the panel mounting bolts that penetrate the panel and protruding from the back of the panel. Because.

Further, the mounting bolts according to the present invention require that the maximum diameter of the front end portion of the panel mounting bolts does not exceed the peak diameter of the shaft portion of the panel mounting bolts.
This is because, as shown in FIG. 4 (a), if the maximum diameter of the tip of the panel mounting bolts is made larger than the thread diameter of the thread of the shaft, Patent Document 1 and Patent Document 2 are used when driving the panel. In the same way as when the insertion holes for inserting the mounting bolts into the panel are drilled, the panel mounting bolts cannot be threaded at all when the panel mounting bolts are driven in the field. This is because when the nut is screwed together, the panel mounting bolts are swung around or pulled out, and if someone does not hold the panel mounting bolts on the upper side, it will not be possible to screw them. .
On the other hand, as shown in FIGS. 4 (b) to 4 (d), by setting the maximum diameter of the conical tip of the mounting bolts according to the present invention to be less than the mountain diameter of the shaft portion, When the panel mounting bolts are driven into the panel, the thread of the shaft of the panel mounting bolts remains firmly on the panel, ensuring that the panel mounting bolts and the panel are sufficiently screwed together. This is because it is possible to prevent co-rotation and disconnection during screwing, and it is possible to securely fix the panel.
In addition, as shown in FIG.4 (c) and FIG.4 (d), it is most preferable that the maximum diameter of the front-end | tip part of panel mounting bolts is below the trough diameter of a shaft part.
This is because the diameter of the hole drilled at the tip of the panel mounting bolts is reduced, so that when the panel mounting bolts are driven into the panel, all the threads of the shaft of the panel mounting bolts This is because the panel is firmly attached to the panel, and the effect of preventing the surroundings and omission is the highest.

In addition, the mounting bolts according to the present invention can achieve the above-described effect if the conical angle at the tip of the mounting bolts is less than 180 degrees, but the angle is in the range of 20 degrees to 60 degrees. However, it is most preferable because it can be easily driven into the panel, the conical portion at the tip is small and the space after installation is small, and no specially difficult technique is required for manufacturing.
If the cone angle of the tip of the mounting bolts is less than 20 degrees, the driving comfort will be much better, but the length of the panel mounting bolts protruding from the back of the panel after fixing the panel will be long, requiring a large space In addition, the mounting bolts themselves are unnecessarily long and the tip is extremely sharp, and care must be taken when carrying to the site and handling.
In addition, if the conical angle of the tip of the mounting bolts exceeds 60 degrees, the resistance to spread the panel at the time of driving is increased, workability is reduced, and it is necessary to devise in manufacturing. It is not preferable.

Panel mounting bolts (hereinafter referred to as “panel mounting bolts according to the first embodiment”) including a substantially conical tip portion having a substantially flat surface with a cone angle of 35 degrees and a shaft portion provided with a screw portion. )), 10 tests were performed on the ALC panel. In addition, the thing with the same diameter as the maximum diameter of the front-end | tip part of the said mounting bolts and the trough diameter of the axial part of this panel mounting bolt was used.
As a result, 10 out of 10 panel mounting bolts according to Example 1 after the driving test could be screwed into the nut without stress.
Moreover, the panel mounting bolts according to Example 1 were in a state in which there was almost no clogging at the tip and the shaft. Furthermore, since the cone angle at the tip was 35 degrees, it was possible to drive smoothly.
FIG. 5A shows external photographs of the front end shape (upper right, upper left, lower left) and the front end shape (lower right) after construction of the panel mounting bolts according to the first embodiment.

Except for the conical angle of the tip portion being 90 degrees, the same conditions as the panel mounting bolts according to the first embodiment (hereinafter referred to as “panel mounting bolts according to the second embodiment”) are used. Ten driving tests were performed on the panel.
As a result, 10 out of 10 panel mounting bolts according to Example 2 after the driving test could be screwed into the nut without stress.
In addition, the panel mounting bolts according to Example 2 had a conical angle of 90 ° at the tip, which was somewhat difficult to drive, but there was almost no clogging at the tip and the shaft.
FIG. 5B shows external photographs of the front end shape (upper right, upper left, lower left) and the front end shape after construction (lower right) of the panel mounting bolts according to Example 2.

[Comparative Example 1]
Except for providing a small protrusion on the surface of the substantially conical tip, the same conditions as those of the panel mounting bolts according to Example 1 (hereinafter referred to as “panel mounting bolts according to Comparative Example 1”) 10), and 10 tests were performed on the same ALC panel.
As a result, only 5 out of 10 panel mounting bolts according to Comparative Example 1 after the driving test could be screwed into the nut.
The reason is considered to be that some clogging occurred because there was a small protrusion at the tip of the panel mounting bolts according to Comparative Example 1. However, the degree of clogged powder was not so much, and the ease of driving was remarkably improved.
FIG. 5C shows appearance photographs of the front end shape (upper right, upper left, lower left) and the front end shape (lower right) after construction of the panel mounting bolts according to Comparative Example 1.

[Comparative Example 2]
A drilling tapping screw (product number “MB Tesque HEX 6-14 × 125ZNU”) (hereinafter referred to as “panel mounting bolts according to Comparative Example 2”) having a cutting edge on the surface of the tip is used. Similarly, ten driving tests were performed on the ALC panel.
As a result, one out of ten panel mounting bolts according to Comparative Example 2 after the driving test could not be screwed into the nut.
The reason for this is that the panel mounting bolts according to Comparative Example 2 have a blade at the tip, so that ALC is cut and driven at the time of screw driving, resulting in a large amount of clogging. It appears to be. Moreover, the clogged powder is thought to be caused by clogging in a fairly hard state.
FIG. 5 (d) shows appearance photographs of the front end shape (upper right, upper left, lower left) and the front end shape (lower right) after construction of panel mounting bolts according to Comparative Example 2.

[Comparative Example 3]
Except that the thread is provided up to the surface of the substantially conical tip, the same conditions as the panel mounting bolts according to Example 1 (hereinafter referred to as “panel mounting bolts according to Comparative Example 3”) 10), the same ALC panel driving test was carried out ten times.
As a result, only one out of ten panel mounting bolts according to Comparative Example 3 after the driving test could be screwed into the nut.
The reason is considered to be that a large amount of clogging occurred because there was a screw thread as a large protrusion at the tip of the panel mounting bolts according to Comparative Example 3. In addition, the clogged powder was clogged in a fairly hard state, but compared with the panel mounting bolts according to Comparative Example 2, the workability was not the worst because the cone angle at the tip was an acute angle.
FIG. 5 (e) shows external appearance photographs of the front end shape (upper right, upper left, lower left) and the front end shape (lower right) after construction of panel mounting bolts according to Comparative Example 3.

1 is a partially broken perspective view showing an embodiment of a panel mounting structure using panel mounting bolts according to the present invention. It is sectional drawing which shows one Example of the panel attachment house structure using the bolts for panel attachment which concern on this invention. (X) is a schematic diagram of panel mounting bolts comprising a tip portion and a shaft portion according to the present invention, and the shape of the tip portion of the panel mounting bolts according to the present invention and the panel mounting bolts according to the prior art (A) is one example showing the most preferable tip shape in the present invention, (b) is one example showing the tip shape in the present invention, (c) is An example showing a tip shape having a protrusion at the tip portion of Comparative Example 1, (d) is an example showing a tip shape of a drilling tapping screw having a cutting edge at the tip portion of Comparative Example 2 [Prior Art]. (E) is an example of a tip shape in which a screw thread is provided up to the tip shown in Comparative Example 3 [Prior Art], and (f) is a tip of a tip provided with a blade at the tip of the prior art. Example, (g) is an example of a tip portion provided with a notch in the tip portion of the prior art, and (h) is a conventional technology. The distal portion of one embodiment in which a and projections as cutting edge blade. (Y) is the schematic of the panel mounting bolts which consist of the front-end | tip part and axial part which concern on this invention, The front-end | tip part of the panel mounting bolts which concern on this invention, and the panel mounting bolts which concern on a prior art It is an example of the enlarged view explaining the relationship between the maximum diameter of and the thread diameter of a shaft part, Comprising: (a) is not preferable in this invention, The maximum diameter of the front-end | tip part is a thread diameter of the thread of a shaft part. (B) is an embodiment when the maximum diameter of the tip portion is smaller than the thread diameter of the screw thread of the shaft portion and larger than the valley diameter, which is preferable in the present invention. ) Is an example when the maximum diameter of the tip portion is most preferable in the present invention and is smaller than the thread diameter of the thread of the shaft portion and larger than the valley diameter, and (d) is the most preferable tip portion of the present invention. This is an example in which the maximum diameter is smaller than the thread diameter of the thread of the shaft and larger than the valley diameter. It is an external appearance photograph of the tip shape (upper right, upper left, lower left) before construction of the panel mounting bolts concerning Example 1, and the tip shape after construction (lower right). It is the external appearance photograph of the tip shape (upper right, upper left, lower left) before construction of the panel mounting bolts concerning Example 2, and the tip shape after construction (lower right). It is an external appearance photograph of the tip shape (upper right, upper left, lower left) before construction of the panel mounting bolts concerning comparative example 1 and the tip shape after construction (lower right). It is an external appearance photograph of the tip shape (upper right, upper left, lower left) before construction of the panel mounting bolts concerning comparative example 2, and the tip shape after construction (lower right). It is an external appearance photograph of the tip shape (upper right, upper left, lower left) before construction of the bolt for panel attachment concerning comparative example 3, and the tip shape after construction (lower right). It is a look-up perspective view of a prior art (patent document 1). It is sectional drawing of a prior art (patent document 1). It is a look-down perspective view of a prior art (patent document 1). It is a perspective view of the attachment bolt of a prior art (patent document 2). It is sectional drawing of a prior art (patent document 2). It is a perspective view of a prior art (patent document 3). It is a perspective view of the attachment hardware of a prior art (patent document 3). It is a perspective view of the panel processing of a prior art (patent document 3).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Panel 2 H-shaped steel beam 2a Flange 3 Panel attachment bolts 3a 3 tip part 3b 3 shaft part 3c 3 shaft part 3c 3 tip part and shaft part intersection 4 nut 5 fixing bracket

Claims (2)

Panel mounting bolts for passing through the panel with respect to the mounting position of the fixing bracket disposed in the structural frame,
The front end portion of the panel mounting bolts has a substantially conical shape having a substantially smooth surface without a thread, and the shaft portion of the panel mounting bolts is for screwing with a nut through the fixing bracket. Panel mounting bolts characterized by comprising screw parts. Panel mounting bolts for passing through the panel with respect to the mounting position of the fixing bracket disposed in the structural frame,
Panel mounting bolts, characterized in that the maximum diameter of the front end portion of the panel mounting bolts does not exceed the peak diameter of the shaft portion of the panel mounting bolts.