JP2019127694A - Scaffolding connecting device - Google Patents

Abstract

To provide a scaffolding connecting device easy in connecting scaffoldings and reduced in construction labor of a building.SOLUTION: A scaffolding connecting device is composed of a drill screw 1, an intermediate member 2 and a joint member 3. The drill screw 1 has a flange 6 and a second screw part 8, and the intermediate member 2 is screwed to the second screw part 8. The joint member 3 is distributably connected to the intermediate member 2 by a bolt 11. By rotating the bolt 11 with a wrench 16, the drill screw 1 is screwed into a structural material 26 of the building. End face cams 18, 19 clutch-likely meshing with each other are formed on the flange 6 of the drill screw 1 and a tip face of the intermediate member 2. When screwing, while surely transmitting torque, the drill screw 1 is not co-rotated when unscrewing the intermediate member 2. Therefore, only the intermediate member 2 can be easily removed. The drill screw 1 functions as a fastening means of a wall material 27.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a scaffold connecting device for connecting a scaffold installed in the construction of a steel-type building or the like to the building.

  In constructing a steel-frame building or the like, a scaffold is assembled to surround the building, and the scaffold is fixed to the building via a scaffolding device so as not to fall down. As an example of this scaffolding device, Patent Literature 1 discloses a metal fitting made of a drill screw and a long nut (high nut).

  That is, in the metal fitting of Patent Document 1, a cylindrical portion for holding the head of a drill screw is formed at one end of a long nut into which a coupling shaft (scaffolding joint) connected to a scaffold is screwed. It is designed to be able to swing (swing) with respect to the head of the drill screw, and since the axis of the long nut can be arbitrarily changed within a certain range with respect to the axis of the drill screw, the connecting shaft Even if the shaft center of the drill is shifted from the shaft center of the drill screw, the connecting shaft body and the long nut can be connected.

Patent No. 2764232

  In buildings where this type of metal fitting is used, wall materials such as ALC plates and heat insulation panels are fixed to a structural material made of angle C-shaped steel etc. The drill screw of Patent Document 1 is a wall of ALC plates etc. It is threaded into the structural material through the material.

  And in patent document 1, since the head of the drill screw is held at one end of the long nut, in order to remove the long nut, it is necessary to unscrew the drill screw with a wrench and take it out of the building. After removing the drill screw set with the long nut, another fixing drill screw is screwed back into the same location to fix the wall material. For this reason, two processes of the process of removing the drilling screw for scaffold connection and the process of screwing another drill screw in the same place are required, and there was a problem that construction of a building takes time and effort.

  In addition, the step of re-fixing the wall material to the structural material with another drill screw is performed in a state in which the connection by the metal fittings is released, so it can be said that there is also a problem with safety.

  The present invention has been made under such circumstances, and eliminates the process of removing a drill screw and reattaching another drill screw, thereby reducing the time and effort for building construction, etc. It is an issue.

The present invention relates to a scaffold connecting device used for construction of a steel frame type building etc., and this scaffold connecting device is:
“A drill screw (screw with a drill part) to be screwed into a building, an intermediate member attached to the drill screw, and a joint member attached to the intermediate member and to which a joint joint for scaffolding is connected ,
The drill screw and the intermediate member are arranged concentrically and screwed together, and thus the drill screw includes a first screw portion screwed into a building and a second screw portion screwed into the intermediate member. While having
The intermediate member and the joint member are connected to each other so as to be freely rotatable and swingable so that the relative posture can be arbitrarily changed.
The drill screw is screwed into the building by rotating the intermediate member with a wrench while the intermediate member is fully screwed into the second screw portion of the drill screw. "
It has a basic configuration.

And in claim 1, in the above basic configuration,
“An anti-break-in means for facilitating unscrewing of the intermediate member from the second screw portion of the drill screw is formed at the opposing portion of the drill screw and the intermediate member.”
The configuration is added. The "facing portion between the drill screw and the intermediate member" includes a portion facing in the axial direction and a portion facing in the radial direction.

The present invention can be developed in various ways. The example is specified by claim 2 or less. Among these, in claim 2, in claim 1,
“The biting prevention means is constituted by end face cams formed on opposing surfaces of the drill screw and the intermediate member, respectively, and the end face cam has an engagement surface parallel to the axis, By engaging the engagement surface with the engagement surface of the drill screw, the rotational torque of the intermediate member is transmitted to the drill screw. "
It is the composition.

Moreover, in claim 3, in claim 2,
"The end face cam of the drill screw and the intermediate member has a plurality of engaging surfaces spaced at equal intervals in the circumferential direction and a circumferentially extending relief surface located between the adjacent engaging surfaces. The relief surface of the intermediate member is an inclined surface inclined with respect to a plane orthogonal to the axial center of the intermediate member, and the inclination angle of the inclined surface is determined by screwing the intermediate member and the drill screw. It is smaller than the lead angle of the combined screw. "
It is the composition.

The invention of claim 4 is characterized in that in claim 2 or 3,
"In the screwing portion between the intermediate member and the drill screw, a play larger than the reference tolerance is formed so that axial rattling occurs."
It is the composition.

In claim 5, in any of claims 1 to 4,
"The joint member is hollow and the outer periphery is formed in a square shape, and is connected to the intermediate member by a bolt,
The bolt head is formed with an engagement hole for rotating with a wrench, the bolt head is inserted into the joint member, and the bolt is screwed into the intermediate member. By spacing the member and the coupling member, it is permitted to swing the coupling member relative to the intermediate member,
And, by rotating the bolt with a wrench, the drill screw is rotated through the intermediate member. "
It is the composition.

  In the present invention, although the drill screw is screwed into the structural material of the building or the like through the intermediate member, since the bite prevention means is provided, the intermediate member can be unscrewed and removed from the second screw portion of the drill screw.

  That is, if the intermediate member is only screwed into the second screw portion of the drill screw, the biting between the screw threads causes the phenomenon that the drill screw returns together as the intermediate member is reversely rotated. Then, since the biting between the screw threads does not occur due to the presence of the biting prevention means, only the intermediate member can be removed.

  Therefore, the drill screw can be left in the building as it is when the scaffold is removed. For this reason, there is no need to remove the drilling screws of the scaffold binding device and to re-screw another drilling screw for fixing the wall material such as ALC or heat insulating material, and the work of building construction can be reduced accordingly. Can. Moreover, since the operation | work which fixes a wall material to a structural material in the state which cancel | released the connection by a scaffolding apparatus is unnecessary, a worker's safety can also be improved.

  The biting prevention means can adopt various structures. However, if the end face cam is used as in claim 2, there is an advantage that the biting prevention can be ensured with a simple structure. In this case, adopting the configuration according to claim 3 is particularly preferable because the engagement between the engagement surfaces of the end face cams can be ensured and the disengagement between the engagement surfaces upon screwing back of the intermediate member can be ensured. .

  Now, the standard dimensions of the screw are specified in JIS, and the bolt and nut are specified in a state that there is almost no backlash in the axial direction. However, when the intermediate member and the drill screw are engaged by the cam mechanism, If the drill screw is manufactured based on JIS and there is no play in the screwing state, the cam of the intermediate member hits the cam of the drill screw and the cams bite into each other before screwing the intermediate member into the drill screw. In such a case, the drill screw may rotate along with the screw return of the intermediate member.

  On the other hand, when the configuration of claim 4 is adopted, even if the cam of the intermediate member hits the cam of the drill screw before the intermediate member is completely screwed in, the intermediate member is axially retracted so that the cam of the intermediate member Since the biting phenomenon of the drill screw with the cam can be prevented and the screwing of the intermediate member can be continued, the intermediate member can be reliably screwed in to the end so that the cam and the cam can be brought into contact without biting. Accordingly, it is possible to reliably prevent the return of the drill screw. The dimension of the axial play (backlash) may be about 0.2 to 0.3 mm.

  According to the fifth aspect of the present invention, since the intermediate member can be rotated by a wrench using a bolt for connecting the joint member to the intermediate member, the structure can be simplified and cost can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows embodiment, (A) is a partial fracture isolation side view, (B) is a BB view of (A), (C) is a CC view of (A), (D) is a figure. (A) DD view, (E) is a partial side view in the set state, (F) is a developed view of the end face cam. (A) is a partially cutaway side view in a state of being attached to a building, (B) is a partial plan sectional view showing a state of connection with a scaffold, (C) is a sectional view in a state in which an intermediate member is removed .

(1) Description of Structure Next, an embodiment of the present invention will be described with reference to the drawings. The scaffold tethering device of the embodiment includes a drill screw 1, an intermediate member 2, and a joint member 3. A dish-shaped washer 4 and a packing 5 are fitted into the drill screw 1. The drill screw 1 and the intermediate member 2 are concentrically connected.

  A drill portion 1 a is formed at the tip of the drill screw 1, and a flange 6 that overlaps the washer 4 is formed at the other end of the shaft. A first screw portion 7 is formed between the drill portion 1 a and the flange 6 in the shaft, and a male screw type second screw portion 8 is formed on the opposite side of the flange 6 with the first screw portion 7. It is done. The end surface of the second screw portion 8 has an engagement hole 9 into which a wrench such as a hexagon is engaged. The first screw portion 7 may only be partially formed in an appropriate range on the side of the drill portion 1a (an unthreaded portion may be present in the shaft).

  The intermediate member 2 is a hexagonal high nut (long nut), and a female screw 10 screwed with the second screw portion 8 of the drill screw 1 is formed over the entire length inside. On the other hand, the joint member 3 has an external appearance like a hexagonal high nut and is connected to the intermediate member 2 by a bolt 11. Note that the outer peripheral surface of the intermediate member 2 does not have to be a hexagonal square, but if it is formed into a square, it can be easily rotated upon removal.

  The bolt 11 is provided with a countersunk head 11 a in which a hexagonal hole 12 is formed on the top surface, and the countersunk head 11 a enters into the inside of the joint member 3. Then, at one end portion of the joint member 3 located on the side of the intermediate member 2, a tapered surface 13 on which the countersunk head 11 a of the bolt 11 overlaps and an inward flange 14 loosely fitted with the shaft of the bolt 11 are formed. There is.

  A certain range of the lower part of the neck of the bolt 11 is a non-threaded portion 11b with the material diameter unchanged, and with the bolt 11 completely screwed into the intermediate member 2, a certain amount of space between the intermediate member 2 and the joint member 3 There is an interval. Therefore, the intermediate member 2 and the joint member 3 are a kind of universal joint, and the joint member 3 can be arbitrarily changed in posture to a position intersecting the intermediate member 2 within a certain range. In other words, the joint member 3 can freely swing relative to the intermediate member 2 within a certain range (for example, about 10 ° with respect to the axial center of the intermediate member 2). An external thread 15 is formed on the inner periphery of the joint member 3.

(2). Biting-prevention means Since the bolt 11 is screwed into the intermediate member 2, the drill screw 1 can be rotated by rotating the bolt 11 with the wrench 16 as shown in FIG. 2 (A). However, if only the intermediate member 2 is screwed into the second screw portion 8 of the drill screw 1, the female screw 10 of the intermediate member 2 and the male screw of the second screw portion 8 bite into each other, and the intermediate member 2 is unscrewed. The drill screw 1 may also come back together. Therefore, end face cams 18 and 19 that engage with each other are formed on the tip end surface of the intermediate member 2 and the flange 6 of the drill screw 1 as an example of biting-in preventing means for preventing the return of the drill screw 1.

  The end face cams 18 and 19 include three engaging surfaces 20 and 21 parallel to the axis, and three circumferentially extending relief surfaces 22 and 23 positioned between the adjacent engaging surfaces 20 and 21. It has a clutch-like form as a whole. The height of the engaging surfaces 20 and 21 is about 1/3 of the pitch of the second screw portion 8 in the female screw 9 and the drill screw 1 of the intermediate member 2.

  FIG. 1 (F) is a developed view of the end face cams 18, 19. As shown in FIG. 1 (B), with the intermediate position of two adjacent engagement surfaces 20, 21 as a starting point (0 °), The end face cams 18 and 19 are displayed in a state of being stretched in the circumferential direction. However, for easy understanding, the ratio in the axial direction is displayed larger than the actual ratio.

  In the end face cam 18 of the intermediate member 2, the escape surface 23 extending in the circumferential direction between the adjacent engagement surfaces 20 is an inclined surface which is entirely inclined with respect to the plane orthogonal to the axial center of the intermediate member 2. The inclined relief surface 23 changes at an equal rate. The inclination angle θ1 of the relief surface 23 of the intermediate member 2 is slightly larger than the lead angle θ2 of the female screw 9 of the intermediate member 2 and the second screw portion 8 of the drill screw 1.

  On the other hand, in the end face cam 19 of the flange 6 in the drill screw 1, a slight range of the escape surface 23 on the side connected to the proximal end of the engagement surface 21 is parallel to a plane orthogonal to the axis of the drill screw 1. The flat surface 23 a is formed, and the other portion is an inclined surface 23 b inclined with respect to a plane orthogonal to the axis of the drill screw 1. The inclination angle θ3 of the inclined surface 23 b of the drill screw 1 is It is approximately the same as the lead angle θ2 of the screw.

  Accordingly, with the engagement surfaces 20 and 21 of the end face cams 18 and 19 engaged, a slight space is left between the relief surface 23 of the intermediate member 2 and the relief surface 23 of the drill screw 1. Therefore, when the intermediate member 2 is screwed in, the engagement surfaces 20 and 21 can be engaged with each other without bringing the release surfaces 22 and 23 into contact with each other, and when the intermediate member 2 is screwed back, the release surface 22 and 23 can be removed without resistance, and only the intermediate member 2 can be removed easily.

  According to the standard dimensions of JIS, the bolt and the nut are differently screwed in a state in which there is no backlash in the axial direction, but in this embodiment, it is indicated by a dotted line in FIG. As described above, a play (backlash) having a slight dimension S is positively formed in the axial direction between the intermediate member 2 and the second screw portion 8. Therefore, even when the plurality of cams 18 and 19 are formed circumferentially apart as in the embodiment, the end face cam 18 of the intermediate member 2 strikes the end face cam 19 of the drill screw 1 before screwing in the intermediate member 2. As the intermediate member 2 moves backward, the cams 18 and 19 are prevented from biting into each other, and the screwing of the intermediate member 2 can be continued. Therefore, the intermediate member 2 can be screwed to the end, and the engagement surfaces 20 and 21 of both cams 18 and 19 can be brought into contact with each other.

  When the intermediate member 2 is completely screwed in, the intermediate member 2 is retracted by an amount of the play size S, but the height of the engagement surfaces 20 and 21 is larger than the size S of the play. The meshing state is maintained. Therefore, the screwing function of the drill screw 1 is secured. The play dimension S can be set according to the diameter of the screw. For example, when the outer diameter is 8 mm, it may be about 0.2 to 0.3 mm. As means for forming the play, the valley width of the internal thread of the intermediate member 2 may be increased, or the peak width of the second screw portion 8 in the drill screw 1 may be reduced, or both may be combined.

  The height of the engagement surfaces 20 and 21 is a size obtained by dividing the pitch by the engagement surfaces 20 and 21. Therefore, the smaller the number of engagement surfaces 20 and 21, the larger the height of the engagement surfaces 20 and 21. Thus, the engagement can be ensured, but when the number of engagement surfaces 20, 21 is one or two, torque transmission to the drill screw 1 tends to be unstable. In this regard, it is preferable to provide three engagement surfaces 20 and 21 at intervals of 120 ° because torque transmission can be stabilized while ensuring a necessary height. If the thread of the second screw portion 8 and the female screw 10 of the intermediate member 2 are formed as multiple threads such as double thread, the pitch can be increased, so the height of the engagement surfaces 20 and 21 is increased to achieve meshing. It can be assured.

(3) Summary The building to be used for the scaffolding device has a structure in which a wall material 27 such as an ALC panel or a heat insulation panel is attached to a structural material 26 such as an angle material or C-shaped steel. The scaffolding device is attached to the building by rotating the bolt 11 with the wrench 16 inserted into the joint member 3 and rotating the drill screw 1 through the intermediate member 2. That is, in a state where the wall material 27 is pressed by the flange 6 via the packing 5 and the washer 4, the drill screw 1 is screwed into the structural material 26 of the building, so that the scaffolding connecting device is attached to the building.

  The scaffold is provided with a pipe-made column 28, and a joint fitting 29 for holding the column 28 is fixed to the end face of the joint member 3 by a bolt 30. In this case, since the joint member 3 can be oscillated within a certain range, the joint fitting 29 can be fastened to the joint member 3 even if the position of the support 28 is somewhat shifted. The bolt 30 is screwed in a state where the joint member 3 is held in a non-rotatable manner by a spanner.

  When removing the scaffold, the joint fitting 29 may be removed and then the intermediate member 2 may be manually screwed back (of course, it may be screwed back using a tool). As described above, since the intermediate member 2 does not bite into the second screw portion 8 of the drill screw 1, the intermediate member 2 can be removed very easily in a state in which the accompanying return of the drill screw 1 is prevented.

  As in the embodiment, when the second screw portion 8 of the drill screw 1 is formed with the engagement hole 9 into which the wrench is fitted, the intermediate member 2 can be retightened after being removed. Moreover, when it is necessary to remove the drill screw 1 for some reason, it can be easily removed. Therefore, it is excellent in flexibility. It is also possible to form the flange 6 in a polygon such as a hexagon so that it can be rotated with a spanner.

  The drill screw 1 remains attached to the building, and the drill screw 1 continues to function as a fastening member for the wall material 27. Therefore, the effort of construction of a building can be reduced. If the second screw portion 8 of the drill screw 1 remains exposed after completion of the building, the exposed portion may be covered with a cap 31 made of resin or the like, as shown by a dashed dotted line in FIG. . When the second screw portion 8 is covered with mortar or covered with a siding material, a special covering means is unnecessary (again, it is possible to cover with a cap 31 for anticorrosion etc.). ).

  In this embodiment, although the drill screw 1, the intermediate member 2 and the joint member 3 are set, when the scaffold is removed, the intermediate member 2 and the joint member 3 are removed from the building. The removed intermediate member 2 and joint member 3 may be discarded, or the drill screw 1 may be supplemented and regenerated as a new set.

  In the above embodiment, the head of the bolt 11 connecting the joint member 3 to the intermediate member 2 is formed as a countersunk head, but a cylindrical head, a pan head, a spherical head, etc. may be adopted. In the embodiment, the second screw portion 8 of the drill screw 1 is a male screw, but it is also possible to reverse the male-female relationship between the second screw portion 8 and the intermediate member 2.

  As the biting prevention means, for example, a ring made of an elastic material that compresses and deforms can be interposed between the second screw portion and the intermediate member. When the end face cam is employed, a configuration in which a plurality of protrusions separated in the circumferential direction are provided on the surface where the second screw portion and the intermediate member face each other may be employed. Further, it is also possible to adopt a circumferential surface cam instead of the end surface cam.

  The present invention can be embodied in a scaffold tethering device. Therefore, it can be used industrially.

DESCRIPTION OF SYMBOLS 1 Drill screw 1a Drill part 2 Intermediate member 3 Joint member 4 Washer 5 Packing 6 Flange 7 1st screw part 8 2nd screw part 11 Bolt 11a Countersunk 16 Wrench 18, 19 End surface cam 20, 21 Engagement surface 22, 23 Relief Surface 26 Structural material 27 Building wall material 29 Joint fitting constituting the scaffolding θ1 Inclination angle of relief surface (inclined surface) θ2 Lead angle of screw

Claims (5)

A drill screw to be screwed into a building, an intermediate member attached to the drill screw, and a joint member attached to the intermediate member and connected to the joint fitting for scaffolding,
The drill screw and the intermediate member are arranged concentrically and screwed together, and thus the drill screw includes a first screw portion screwed into a building and a second screw portion screwed into the intermediate member. While having
The intermediate member and the joint member are connected to each other so as to be freely rotatable and swingable so that the relative posture can be arbitrarily changed.
The structure is such that the drill screw is screwed into a building by rotating the intermediate member with a wrench in a state in which the intermediate member is completely screwed into the second screw portion of the drill screw,
A biting prevention means is formed on the opposing portion between the drill screw and the intermediate member to facilitate unscrewing of the intermediate member from the second screw portion of the drill screw.
Scaffold tethering device. The biting prevention means is composed of end face cams formed on opposing surfaces of the drill screw and the intermediate member, respectively, and the end face cam has an engagement surface parallel to the shaft center. The mating surface engages with the engagement surface of the drill screw, whereby the rotational torque of the intermediate member is transmitted to the drill screw.
The scaffolding device according to claim 1. The end face cam of the drill screw and the intermediate member has a plurality of engagement surfaces spaced at equal intervals in the circumferential direction, and a relief surface positioned between adjacent engagement surfaces and extending in the circumferential direction. The relief surface of the intermediate member is inclined with respect to a plane orthogonal to the axis of the intermediate member, and the inclination angle of the inclined surface is such that the intermediate member and the drill screw are screwed together. Smaller than the lead angle of the screw
The scaffolding device according to claim 2. In the screwing portion between the intermediate member and the drill screw, a play larger than a reference tolerance is formed so that axial rattling occurs.
The scaffolding device according to claim 2 or 3. The joint member is hollow and has a rectangular outer periphery, and is connected to the intermediate member by a bolt.
The bolt head is formed with an engagement hole for rotating with a wrench, the bolt head is inserted into the joint member, and the bolt is screwed into the intermediate member. By spacing the member and the coupling member, it is permitted to swing the coupling member relative to the intermediate member,
And, by rotating the bolt with a wrench, the drill screw is rotated through the intermediate member,
The scaffold connecting device according to any one of claims 1 to 4.

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