JP6709064B2 - Connecting bolt set and morning glory unit using the same - Google Patents

Description

The present invention relates to a connecting bolt set that connects bolts.

The temporary scaffolding at the construction site is a fall prevention morning glory, which is a protective fence to catch falling objects, in order to prevent materials and tools accidentally dropped during work etc. from hitting the person below. Is installed. For example, Patent Documents 1 and 2 below disclose fall prevention morning glories.

Further, in recent years, in order to facilitate the carrying of the fall prevention morning glory, there has also been provided a fall prevention morning glory in which a frame or the like can be easily disassembled and can be carried in a small packaged state. Since such a fall prevention morning glory needs to be assembled at a high place where the scaffolding is installed, it is necessary to take care not to accidentally drop bolts or the like for connecting the frames during assembly.

On the other hand, hitherto, a fall prevention mechanism has been provided for preventing a bolt or the like from falling when working at a high place at a construction site or the like, and is disclosed in, for example, Patent Documents 3 and 4 below.

JP, 2005-203184, A JP, 2014-84594, A Japanese Patent No. 5756243 JP, 2010-25302, A

However, in the fall prevention mechanism disclosed in Patent Documents 3 and 4, it is necessary to attach and detach the fall prevention mechanism to and from the bolt every time the bolt is turned, so it takes a lot of time and the wire extends from the head of the bolt. Therefore, it becomes difficult to turn the bolt with a box wrench or ratchet wrench when the fall prevention mechanism is set.

The present invention has been made in view of such a problem, and provides a connecting bolt set that can rotate a bolt in the same manner as an ordinary bolt and that can prevent the bolt from falling with a simple configuration. The purpose is to

A connecting bolt set according to the present invention for solving the above-mentioned problems is a connecting bolt set in which two bolts are connected by a string-shaped member, wherein the bolts are provided below the head with a predetermined distance from the head. Of the first flange formed, the annular groove formed between the head and the first flange, the screw portion formed under the first flange , the head and the annular groove And a second flange having a size including the head in a plan view, which is integrally formed continuously with the head, and both ends of the string-like member surround the bolt. It is characterized in that it is bound in the annular groove so as to be rotatable in any direction.

Further, the morning glory unit according to the present invention is a connecting bolt set in which two bolts are connected by a string-like member in a morning glory unit installed on a scaffolding at a construction site to receive a falling object, and the bolt is a head. A first flange formed below the head at a predetermined distance from the head, an annular groove formed between the head and the first flange, and formed below the first flange. A threaded portion, and a second flange that is integrally formed with the head portion between the head portion and the annular groove, and has a size that includes the head portion in plan view , Both ends of the string-like member are connected to the bolt in a circumferential direction so as to be rotatable in the annular groove, and a connecting bolt set, a pair of vertical frames, a pair of horizontal frames, and a pair of horizontal members. A sheet stretched between a frame or the pair of vertical frames, a female screw for bolts for fixing the vertical frame, and a female screw for bolts for fixing the horizontal frame are formed adjacent to each other. A connecting metal fitting for connecting the vertical frame and the horizontal frame, wherein one of the bolts of the connecting bolt set is screwed to the female screw for bolts for fixing the vertical frame, and the other The bolt is screwed to the internal thread for the bolt for fixing the horizontal frame.

According to the connecting bolt set of the present invention, the bolt can be turned in the same manner as an ordinary bolt, and the bolt can be prevented from dropping or losing with a simple configuration.

FIG. 1 is a perspective view of a connecting bolt set according to an embodiment of the present invention. FIG. 2 shows the structure of the bolt according to the embodiment of the present invention. FIG. 3 is a perspective view of the morning glory unit according to the embodiment of the present invention. FIG. 4 is an exploded perspective view of the morning glory unit according to the embodiment of the present invention. FIG. 5 is an exploded perspective view showing an enlarged part of the morning glory unit according to the embodiment of the present invention. FIG. 6 is a perspective view showing an installed state of the fall prevention morning glory according to the embodiment of the present invention.

Hereinafter, a connecting bolt set according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a connecting bolt set according to the present embodiment. 2A and 2B are views showing the configuration of the bolt according to the present embodiment, FIG. 2A is a perspective view, and FIG. 2B is a vertical sectional view.

The connecting bolt set 10 includes two bolts 11 and a connecting wire 30 that is a string-shaped member that connects the two bolts 11. The bolt 11 is characterized in that two-stage flanges 15 and 16 are formed below the head portion 12, and the head portion 12 has a hexagonal prism shape, a screw portion 13 in which a male screw is formed, and a first portion. It has a flange 15, a second flange 16, and an annular groove 17. The entire bolt 11 is manufactured by integral molding.

The second flange 16 has a disk shape, and is integrally formed with the head 12 below the head 12 between the head 12 and the annular groove 17. The second flange 16 serves as a circumscribing circle including the hexagonal head 12 when viewed from above. The first flange 15 is installed below the second flange 16 with a predetermined space. The first flange 15 has the same disk shape as the second flange 16, and is a circumscribing circle having a size that also includes the head 12 when viewed from above.

The ring-shaped groove 17 is a ring-shaped groove formed between the first flange 15 and the second flange 16 so as to make one horizontal rotation around the axis of the bolt 11, and the shaft 17a at the portion of the ring-shaped groove 17 is a screw. The diameter is substantially the same as that of the portion 13.

The connecting wire 30 is a linear member that connects the two bolts 11, and the groove winding portions 31 are formed at both ends thereof. The groove winding portion 31 is formed by turning the end portion of the connecting wire 30 into the annular groove 17, folding the tip of the groove, and fixing the end portion of the connecting wire 30 to the connecting wire 30 with a sleeve 33 that is a fixture.

The length (circumferential length) of the groove winding portion 31 of the connecting wire 30 is configured to be shorter than the circumferential lengths of the first flange 15 and the second flange 16 of the bolt 11, and the groove firmly fixed by the sleeve 33. The circumferential portion 31 does not come off from the annular groove 17.

The length of the groove winding portion 31 is longer than the length of the annular groove 17 around the shaft 17a, and the groove winding portion 31 is rotatably attached to the shaft 17a (bolt 11). There is.

As described above, in the connecting bolt set 10, since the two bolts 11 are connected by the connecting wire 30, the two bolts 11 are always connected without being separated from each other. Therefore, it is possible to prevent the one bolt 11 from being lost.

Also, if one bolt 11 is screwed somewhere, the other bolt 11 is always connected to this fixed bolt 11, so that the other bolt 11 may be slipped when working at height. Even if dropped, the other bolt 11 does not drop downward, which is very safe.

Further, the connecting wire 30 is connected to the annular groove 17 of the bolt 11, and in the connected state, the head portion 12 is opened upward without being hindered by the connecting wire 30. Therefore, when a tool such as a ratchet wrench is fitted to the head 12 in order to screw the bolt 11, the bolt 11 can be screwed while being connected with the connecting wire 30 without interfering with the connecting wire 30. It can be removed.

Further, in the bolt 11, the second flange 16 installed below the head 12 is a circumscribing circle that includes the hexagon of the head 12 in a plan view, so the head of the tool fitted to the head 12 is The upper surface of the second flange 16 cannot move below the head 12.

Therefore, even when the tool is vigorously fitted into the head 12, the head of the tool hits the connecting wire 30 passed through the head 12 and tied in the annular groove 17 to damage the connecting wire 30. There is nothing to do.

The configuration of the connecting bolt set 10 has been described above. Next, as a usage mode of the connecting bolt set 10, the connecting bolt is connected to the morning glory unit 60, which is a member constituting the fall prevention morning glory installed on the temporary scaffold 5 at the construction site. The case of using the set 10 will be described. Of course, the application place of the connecting bolt set 10 is not limited to the morning glory unit 60, and can be used in various places.

FIG. 3 is a perspective view of the morning glory unit according to the present embodiment. FIG. 4 is an exploded perspective view of the morning glory unit according to the present embodiment. FIG. 5 is an exploded perspective view showing an enlarged part of the morning glory unit according to the present embodiment.

The morning glory unit 60 includes a right vertical frame 61, a left vertical frame 66, an upper horizontal frame 70, a lower horizontal frame 75, a seat 80, and a connecting bolt set 10. The morning glory unit 60 has a frame structure that can be easily disassembled, and the frames 61, 66, 70, and 75 can be bundled into a small package when carrying.

In the assembled state, the right vertical frame 61, the left vertical frame 66, the upper horizontal frame 70, and the lower horizontal frame 75 are connected to each other to form a rectangular frame (frame) as a whole, and the upper end of the right vertical frame 61 is connected. Section and the right end portion of the upper horizontal frame 70 are the upper right connecting portion, the lower end portion of the right vertical frame 61 and the right end portion of the lower horizontal frame 75 are the lower right connecting portion, and the upper end portion of the left vertical frame 66 and the upper horizontal frame portion. The left end portion of 70 is connected and fixed at the upper left connecting portion, and the lower end portion of the left vertical frame 66 and the left end portion of the lower horizontal frame 75 are connected and fixed by the connecting bolt set 10 at the lower left connecting portion.

When the fall prevention morning glory is installed on the scaffold 5, the morning glory unit 60 is carried in a small package to a high place of the scaffold 5, and then assembled and installed there. Further, when removing the scaffold 5, the morning glory unit 60 can be disassembled at a high place of the scaffold 5 and then carried in a small packing state, and can be carried to the installation place in the same packed state at the next site as well. it can. As a result, it is not necessary to raise and lower the assembled large morning glory unit 60 to the upper layer of the scaffold 5, and the installation work efficiency of the fall prevention morning glory can be greatly improved.

First, the disassembled state of the morning glory unit 60 before assembly will be described. As shown in FIG. 4, in the disassembled state, the morning glory unit 60 includes an upper horizontal frame 70, a lower horizontal frame 75, and a connected body of a right vertical frame 61, a left vertical frame 66, and a sheet 80 that are integrally connected. It is divided into three parts.

The sheet 80 is a rectangular mesh net that receives falling objects, and the left and right sides thereof are fixed to the right vertical frame 61 and the left vertical frame 66, respectively, as described later (see FIG. 4). The fixing is realized by winding the round pipes 62 and 67 of the vertical frames 61 and 66 described later.

FIG. 5 is an enlarged view of a lower left connecting portion between the lower end of the left vertical frame 66 and the left end of the lower horizontal frame 75. The left vertical frame 66 includes a round pipe 67 that extends vertically from the upper end to the lower end. The left vertical frame 66 has a lower end side surface slightly larger than the outer diameter of the screw portion 13 of the bolt 11. Two bolt insertion holes 68 that cannot pass through the first flange 15 are formed.

The lower horizontal frame 75 is provided with an L-shaped coupling fitting 76 and a square pipe 78 of a predetermined length that is provided upright at a position facing the round pipe 67 at the left end portion. Two bolt insertion holes 77 (not shown), which are slightly larger than the outer diameter of the screw portion 13 of the bolt 11 and cannot pass through the first flange 15, are formed on the lower surface of the left lateral end of the lower horizontal frame 75. ..

As shown in FIG. 5, female screws 761 for bolting the left vertical frame 66 and female screws 76 for bolting the lower horizontal frame 75 are screwed to the two surfaces of the L-shaped coupling fitting 76. 761 and two are formed, respectively. The distance between the two female threads for bolts 761 on each surface is the same as the distance between the two bolt insertion holes 68 and the distance between the two bolt insertion holes 77. The L-shaped coupling fitting 76 is fixed to the lower surface inside the frame of the lower horizontal frame 75 with the bolt 11 at a position where the female screw 761 for bolt on one surface faces the bolt insertion hole 77.

More specifically, by screwing one of the bolts 11 of the connecting bolt set 10 from the lower outside of the lower horizontal frame 75 into the female screw 761 for a bolt through the bolt insertion hole 77, one surface of the L-shaped connecting fitting 76 is lowered. It is fixed to the horizontal frame 75 with screws. Two female screws for bolts 761 are formed, and two connecting bolt sets 10 are used to fix the L-shaped connecting fittings 76 to the lower horizontal frame 75.

In the two connecting bolt sets 10, only one bolt 11 is fixed to the lower horizontal frame 75, and the other bolt 11 is free. However, since the free bolt 11 is fixed via the connecting wire 30 and is connected to the other bolt 11, the movable range is limited and will not be lost.

Although the configuration of the morning glory unit 60 before assembly in the lower left connecting portion has been described above, the configuration of the morning glory unit 60 is the same in the other connecting portions such as the upper right connecting portion, the lower right connecting portion, and the upper left connecting portion.

That is, although not shown, the right vertical frame 61 includes a round pipe 62 and bolt insertion holes 63 formed on the upper end side surface and the lower end side surface, respectively, and the left vertical frame 66 also includes the upper end side surface. A bolt insertion hole 68 is provided.

Further, the upper horizontal frame 70 is provided with L-shaped connecting fittings 71 having female screws 711 formed therein and square pipes 73, which are installed at both left and right ends, respectively. Two bolt insertion holes 72 are formed. Further, the lower horizontal frame 75 includes an L-shaped connecting fitting 76 installed at the right end and a square pipe 78, and two bolt insertion holes 77 are formed in the lower surface of the frame at the right end.

Next, the work of assembling the morning glory unit 60 at the site of the scaffold 5 will be described. At the time of assembly, the above-mentioned three members are connected and fixed to each other with the connecting bolt set 10. Two connecting bolt sets 10 are installed in each of the upper right connecting portion, the lower right connecting portion, the upper left connecting portion, and the lower left connecting portion, and connect and fix the vertical frames 61, 66 and the horizontal frames 70, 75.

Explaining the lower left connecting portion with reference to FIG. 5, when connecting and fixing the left vertical frame 66 and the lower horizontal frame 75, first, by inserting the square pipe 78 into the round pipe 67, The vertical frame 66 and the lower horizontal frame 75 are guided so as to be in the above-mentioned predetermined relative connection position. At the relative connection position, the bolt insertion hole 68 of the left vertical frame 66 and the female screw 761 for the bolt of the L-shaped connection fitting 76 face each other.

In this state, of the two bolts 11 of the connecting bolt set 10, the free bolt 11 that is not fixed to the lower horizontal frame 75 is screwed into the female screw 761 for bolts from the outside of the left vertical frame 66 through the bolt insertion hole 68. Thus, the remaining surface of the L-side coupling fitting 76 is screwed and fixed to the left vertical frame 66. As a result, the left vertical frame 66 and the lower horizontal frame 75 are firmly connected and fixed via the L-shaped connecting fitting 76.

Subsequently, similarly, the vertical frames 61, 66 and the horizontal frames 70, 75 are connected and fixed in the upper right connecting portion, the lower right connecting portion, and the upper left connecting portion as well, whereby the morning glory unit 60 shown in FIG. 3 is completed.

As described above, it is desirable to fix the L-shaped coupling fittings 71 and 76 to the horizontal frames 70 and 75 with the bolts 11 before assembling the scaffold 5 at a high place. You can fix it with. Further, when the morning glory unit 60 is disassembled for transportation to the next site after use, the bolts 11 for fixing the L-shaped coupling fittings 71, 76 to the horizontal frames 70, 75 are not removed, but the vertical frame 61, It is sufficient to remove only the other bolt 11 for connecting with 66.

Thus, in the present embodiment, the bolts 11 for connecting the frames 61, 66, 70, 75 of the morning glory unit 60 have already been screwed and fixed to the horizontal frames 70, 75 during the assembly work on the scaffold 5. Since the bolt 11 connected to the bolt 11 by the connecting wire 30 is used, even if the bolt 11 slips down from the operator's hand, it only hangs down from the horizontal frames 70, 75 via the connecting wire 30 and Can surely be prevented from falling.

Subsequently, an installation mode of the morning glory unit 60 on the scaffold 5 will be described. FIG. 6 is a perspective view showing a manner of installing the morning glory unit on a scaffold. As shown in the figure, the assembled morning glory unit 60 is rotatably connected to the scaffold 5 via a connecting fitting 79 of the lower horizontal frame 75, and is also attached to the scaffold 5 by a diagonal member 91. It is supported from below, and is further suspended from the scaffold 5 via the connecting metal fitting 74 of the upper horizontal frame 70 and installed by being suspended by a rope 92.

At this time, the morning glory unit 60 is installed in a state of protruding from the scaffold 5 so as to extend obliquely upward from the connecting portion with the scaffold 5, and receives falling objects such as materials from above not to fall downward. Functions as a protective fence.

Although the present embodiment has been described in detail above, according to the connecting bolt set 10, the two connecting bolts 30 are bound together in the annular groove 17 located between the head portion 12 and the screw portion 13, so that the two bolts 11 can be connected. Since the bolts 11 are connected to each other, it is possible to prevent the bolts 11 from being lost, and the head 12 of the bolt 11 is accessible from above while the connecting wire 30 is bound, and the bolt 11 can be freely rotated by a tool. be able to.

If one bolt 11 of the connecting bolt set 10 is fixed to some member, the other bolt 11 can be prevented from falling even if the user's hand slips when screwing the other bolt 11. it can.

According to the morning glory unit 60, the connecting bolt set 10 is used to connect the vertical frames 61, 66 and the horizontal frames 70, 75, and the morning glory unit 60 is assembled or disassembled at a high place of the scaffold 5. At this time, since the bolt 11 that is not the bolt 11 that is tightened or removed by the tool (the bolt 11 that is screwed to the vertical frames 61 and 66) is always screwed and fixed to the horizontal frames 70 and 75, Even if the bolt 11 is about to fall due to slippage, it is possible to reliably prevent the bolt 11 from falling down and causing an accident simply by hanging from the connecting wire 30.

Further, since the one bolt 11 of the connecting bolt set 10 is always screwed and fixed to the lateral frames 70 and 75 in this manner, the morning glory unit 60 is disassembled at a high place of the scaffold 5 and carried to the next site. Even when assembling, the assembly bolt 11 is not lost.

Although the embodiments of the present invention have been described above, the embodiments of the present invention are not limited to the above embodiments, and various modifications can be made without departing from the gist of the present invention. For example, the size, the shape, the material, etc. of the members forming the connecting bolt set and the morning glory unit can be appropriately changed.

Further, in the above embodiment, the bolt is provided with the two-stage flange and the annular groove is formed between the two flanges, but only one flange (only the first flange) may be used. An annular groove may be formed between the head and the first flange.

Further, in the above embodiment, the two-stage flanges installed on the bolt have the same shape, but they may have different shapes. Further, in the above embodiment, the shape of the two flanges is a circumscribing circle of the hexagonal head in a plan view, but it can be appropriately changed and is not limited to a circle, and may be a polygon or an ellipse. good.

The first flange, which is located below the head portion with the annular groove in between, may be of a size and shape such that the groove-surrounding portion of the connecting wire bundled in the annular groove does not come off from the annular groove. Further, the second flange located above the head side across the annular groove may also be of a size and shape such that the groove winding portion of the connecting wire bundled in the annular groove does not come off from the annular groove.

Further, the second flange may have a shape having a portion projecting to the outside of the head in a plan view so that the head of the tool does not slip below the head of the bolt, and ensure that the tool passes through. In order to prevent, it is desirable that the shape is larger than the circumscribing circle including the circumscribing circle disclosed in the above-described embodiment.

Further, in the above-described embodiment, the L-shaped connecting fitting for connecting the vertical frame and the horizontal frame is always fixed to the horizontal frame, but the structure may be fixed to the vertical frame. Also, the connecting fitting may be formed integrally with the horizontal frame or the vertical frame, not separately from the vertical frame. Of course, the shape of the connecting fitting is not limited to the L shape, but can be changed as appropriate.

Further, in the above embodiment, both of the two bolts of the connecting bolt set are used as connecting bolts for connecting the vertical frame and the horizontal frame of the morning glory unit, but the connecting bolt set is used as connecting bolts. Even in this case, one of the bolts may not be used as the connecting bolt.

For example, when one of the bolts of the connecting bolt set is used as a connecting bolt for screwing the horizontal frame and the connecting metal fitting together, the other bolt is screwed and fixed to another female screw also formed on the horizontal frame. Is also good.

In the above embodiment,

10 Connection Bolt Set 11 Bolt 12 Head 13 Screw Part 15 First Flange 16 Second Flange 17 Annular Groove 17a Shaft 30 Connection Wire 31 Groove Circumference 33 Sleeve 60 Boshoku Unit 61 Right Vertical Frame 62 Round Pipe 63 Bolt Insertion Hole 66 Left Vertical frame 67 Round pipe 68 Bolt insertion hole 70 Upper horizontal frame 71 L-type connection fitting 711 Bolt female screw 72 Bolt insertion hole 73 Square pipe 74 Connection fitting 75 Lower horizontal frame 76 L-type connection fitting 761 Bolt internal screw 77 Bolt insertion Hole 78 Square pipe 79 Connecting metal fitting 80 Seat 5 Scaffold 91 diagonal member 92 Rope

Claims (4)

In a connecting bolt set that connects two bolts with a string-shaped member,
The bolt is a first flange formed below the head at a predetermined distance from the head,
An annular groove formed between the head and the first flange,
A screw portion formed under the first flange ,
A second flange that is formed integrally with the head between the head and the annular groove, and has a size that includes the head in a plan view ,
A connecting bolt set, wherein both ends of the string-like member are bound together in the annular groove so as to be rotatable in the circumferential direction with respect to the bolt. The connecting bolt set according to claim 1, wherein the first flange and the second flange are disc-shaped, and the annular groove is recessed in a U shape in a vertical cross section . The connecting bolt set according to claim 2, wherein the annular groove portion has substantially the same diameter as the threaded portion . In the morning glory unit that is installed on the scaffolding at the construction site to catch falling objects,
A connecting bolt set in which two bolts are connected by a string-like member, wherein the bolt includes a first flange formed below the head with a predetermined distance from the head, the head and the first flange. An annular groove formed between the one flange, a threaded portion formed under the first flange, and the head formed between the head and the annular groove so as to be continuous with the head. A second flange having a size including the head portion in a plan view, and both ends of the string-shaped member are bound together in the annular groove so as to be rotatable in the circumferential direction with respect to the bolt. Connecting bolt set,
A pair of vertical frames,
A pair of horizontal frames,
A sheet stretched between the pair of horizontal frames or the pair of vertical frames,
A female thread for a bolt for fixing the vertical frame, and a female fitting for a bolt for fixing the horizontal frame, a connecting fitting for connecting the adjacent vertical frame and the horizontal frame,
Equipped with
One of the bolts of the connecting bolt set is screwed to the female screw for bolts for fixing the vertical frame, and the other bolt is screwed to the female screw for bolts for fixing the horizontal frame. Morning glory unit characterized by that.

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