JP7185873B2 - wall tie - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wall connecting device for connecting a scaffold temporarily installed around a building to an outer wall of the building (hereinafter referred to as an outer wall of the building) when demolishing the building or renovating the outer wall.

In Patent Document 1, a first clamping body and a second clamping body are provided on one end side of a horizontal bar, and the outer wall of the building is sandwiched and fixed by the first clamping body and the second clamping body. A wall tie device is described. In this wall connecting device, a plurality of holes are formed in the horizontal bar and aligned in the longitudinal direction. By aligning these holes with the holes formed in the second clamping body and inserting the connecting pin, the The two clamps can be fixed at a plurality of positions along the cross bar so that the distance between the first clamp and the second clamp can be adjusted. In addition, the second clamp is provided with an adjusting screw shaft so that it can be adapted to different wall thicknesses.

JP-A-09-310483

Although the wall tether device of US Pat. No. 4,700,000 can accommodate exterior walls of varying thicknesses, a through hole in the second clamp and a through hole in the cross bar are required to secure the second clamp to the cross bar. are aligned, a connecting pin is inserted there, and an adjusting screw shaft is tightened. Therefore, in order to fix the wall connecting device of Patent Document 1 to the outer wall of the building and the scaffolding, workers are arranged on the building side and the scaffolding side, or the workers lean out from the scaffolding to perform the fixing work. I have a problem that needs to be done.

The present invention aims to solve the problems of the prior art, and is a wall connecting device that can be securely and firmly fixed to the outer wall of a building and that can be easily attached to and detached from the outer wall by a single worker from scaffolding. is intended to provide

In order to achieve the above object, according to the present invention, a rod-shaped bridging member bridged between a wall of a building and scaffolding arranged around the building, and a wall of the building at the bridging member a first clamping member movably connected along the bridging member to the front end portion of the side; and a second clamping member,
A wall tie that clamps the wall of the building between the first and second clamping members and locks the first clamping member so that it cannot move along the bridging member by the principle of a universal hook. An apparatus is provided.

According to the present invention, an operator can use the first holding member movably connected along the bridging member and the second holding member fixed to the bridging portion so as not to move. The wall tie device can be arranged to bridge the bridging member between the scaffolding disposed around the building and the wall of the building in a clamping manner. By locking the first clamping member so that it cannot move along the bridging member on the principle of a universal hook, the wall connecting device can be firmly fixed to the wall of the building.

Figure 2 is a perspective view of the wall tether according to the first embodiment of the invention, wherein the wall tether is in the unclamped position in Figure 1; FIG. 11 is a perspective view of the wall tie device in the clamping position, seen obliquely from the rear; Fig. 3 is a side perspective view of the wall tie device of Fig. 2; Fig. 10 is a side view of the wall tie in the unclamped position; Fig. 10 is a side view of the wall tie device in clamped position; FIG. 3 is a perspective view showing a modification of the wall tie device of FIG. 1; FIG. 10 is a perspective view of a wall tie device according to a second embodiment; Figure 8 is a side view of the wall tie device of Figure 7; FIG. 4 is a partially enlarged cross-sectional view of the support member, and is a diagram for explaining the offset of the opening formed in the support member;

Preferred embodiments of the present invention will now be described with reference to the accompanying drawings.
1 to 5, the wall connecting device 10 includes a bridging member 12 which is a rod-shaped member that connects a scaffolding (not shown) assembled outside the building to the outer wall W of the building, and the bridging member 12 A first holding member 14 that is movably connected, a second holding member 16 that is fixed so as to intersect the bridging member 12 substantially perpendicularly, and the first holding member 14 to the outer wall W. A drive mechanism 18 is provided for driving to approach and separate. Also, the second holding member 16 has a contact portion 16a at the end opposite to the bridging member 12 .

The first and second holding members 14 and 16 are provided so as to protrude on the same side with respect to the bridging member 12, that is, downward when the wall connecting device 10 is fixed to the outer wall W of the building. It is The second holding member 16 is fixed closer to the distal end of the bridging member 12 than the first holding member 14, and in FIGS. is held by an operator to operate the wall connecting device 10. As shown in FIG.

In this specification, the side on which the second clamping member 16 is arranged is referred to as the distal side of the wall tie device 10, and the opposite side is referred to as the proximal side. In this specification, the longitudinal direction along the bridging member 12 is defined as the front-rear direction, and the horizontal direction perpendicular to the front-rear direction when the wall connecting device 10 is arranged so that the bridging member 12 is horizontal. Transverse direction.

The bridging member 12 consists of a rod-like member of rectangular cross-section made of metal having sufficient strength to connect the scaffolding to the outer wall W of the building, preferably a hollow tubular member having a central axis O. A bridging member 12 is attached to the scaffold at its proximal end.

Drive mechanism 18 includes a support member 20 mounted for movement along bridge member 12 . The support member 20 can be formed from a generally hollow rectangular parallelepiped member. A stopper 20 a is provided at the lower end of the support member 20 . The support member 20 has an opening penetrating from a proximal side surface 20b to a distal side surface 20c, which are two side surfaces facing each other in the front-rear direction. A bridging member 12 is inserted through the opening.

A pair of brackets 22a, 22b are secured to the transverse sides 20d, 20e of the support member 20. As shown in FIG. A stop 21 may be provided below the pair of brackets 22a, 22b on one or both of the side surfaces 20d, 20e of the support member 20. As shown in FIG. A pair of brackets 22a and 22b extend vertically from the support member 20 to the tip side in parallel with each other on both sides of the support member 20. As shown in FIG. An upper end portion of the first holding member 14 is rotatably connected to the distal end portions of the pair of brackets 22a and 22b via a rotating shaft 24 extending in the transverse direction.

A lever 26 forming a drive lever is rotatably connected to the lower end of the first clamping member 14 via a transversely extending pivot 28 . The lever 26 has a pair of arm portions 26a and 26b, and a connecting portion 26c that connects end portions on the base end side of the pair of arm portions 26a and 26b. Arm portions 26 a and 26 b extend parallel to each other on both sides of support member 20 .

When the stop portion 21 is attached to one or both of the side surfaces 20d and 20e of the support member 20, the unclamping position of the lever 26 about the pivot shaft 28 is determined by the contact of the lever 26 with the stop portion 21. be. That is, the maximum value of the tilt angle φ of the lever 26 with respect to the center axis O′ passing through the rotation shaft 28 and parallel to the center axis O of the bridging member 12 is determined. As a result, the position of the roller 32 relative to the support member 20 is kept constant in the unclamped position, preventing the roller 32 from being in a different position for each fixing operation of the wall tie device 10 for each operation.

A rotating shaft 30 extending in the transverse direction is provided between the arm portions 26a and 26b. A roller 32 is rotatably attached to the central portion of the rotating shaft 30 . The rotary shaft 30 is positioned along the arm portions 26a and 26b so that the roller 32 can come into contact with and separate from the tip end side surface 20c of the support member 20 depending on the rotation position of the lever 26 about the rotary shaft 28. ing.

The operation of this embodiment will be described below.
First, as shown, the first clamping member 14 contacts the outer surface W _O of the outer wall W of the building, the second clamping member 16 contacts the inner surface W _I of the outer wall W, and the proximal end of the bridging member 12 contacts the scaffolding. A wall tether 10 is positioned between the scaffolding and the outer wall W so as to extend toward . More specifically, first, the bridging member 12 is pulled proximally until the contact portion 16a of the second holding member 16 comes into contact with the wall inner surface _WI . The lever 26 is then rotated upward until it abuts against the stop 21 and is moved to the unclamping position. With the lever 26 held at the unclamped position, the support member 20 is slid along the bridging member 12 toward the wall, and the tip (lower end) of the first holding member 14 is brought into contact with the outer surface W _O of the outer wall W. Let

At this time, the first clamping member 14 rotates about the rotation shaft 24 and the lever 26 rotates about the rotation shaft 28, so that the tip (lower end) of the first clamping member 14 Substantially at the same time that the roller 32 comes into contact with the outer surface W _O of the outer wall W, the roller 32 comes into contact with the tip side surface 20 c of the support member 20 . This work can be done by a worker from a scaffold.

Next, when the operator pushes down the lever 26 around the pivot shaft 28 , the roller 32 pushes the pivot shaft 28 together with the lever 26 until it engages with the stopper 20 a provided at the lower end of the support member 20 . Move down as center. In this specification, the rotational position where the roller 32 is engaged with the stopper 20a is referred to as the clamp position.

While rotating the lever 26 toward the clamping position in the direction indicated by the arrow R, after the roller 32 contacts the tip side surface 20c of the support member 20, when the lever 26 is further rotated so as to push down, the lever 26 is moved to the tip side. The wall connecting device 10 is urged toward the distal end by the roller 32 in contact with the side surface 20c. As a result, the first holding member 14 rotates around the rotation shaft 24, and the lower end thereof is pressed against the outer surface W _O of the outer wall W as shown in FIG. After that, when the lever 26 is further pushed down and the roller 32 is engaged with the stopper 20a, the lever 26 stops at the clamp position.

When the lever 26 is in the clamping position, the lower end of the first clamping member 14 is pressed against the outer surface W _O of the outer wall W by the biasing force of the roller 32 acting on the lever 26 . As a result, the outer wall W is clamped by the lower end portion of the first clamping member 14 and the contact portion 16a of the second clamping member 16, and the wall connecting device 10 is fixed to the outer wall W. As shown in FIG.

In the wall connecting device 10, when the lever 26 is in the clamping position, the portion of the first clamping member 14 that contacts the outer surface W _O of the outer wall W and the contact portion 16a of the second clamping member 16 are generally on the same horizontal line. It is designed to be placed in This is because if the two heights are different, a bending moment acts on the bridging member 12, which is not preferable.

Furthermore, in the clamp position, the proximal side (the right side in FIGS. 1 to 5) of the lever 26 is lower than the distal side, or the position of the rotating shaft 30 of the roller 32 is lower than the position of the rotating shaft 28. It's like As a result, when the lever 26 rotates from the clamping position to the unclamping position, the support member 20 must once rotate in the direction in which the lower end part thereof separates from the outer wall W, so that the lever 26 remains in the clamping position. to the unclamped position.

In the clamped position, the support member 20 is urged by the roller 32 so that the lower end thereof is separated from the outer wall W, whereby the support member 20 is locked with respect to the bridge member 12 by the "universal key" principle. That is, in FIG. 5, the compressive force acting on the outer wall W by the lower end portion of the first holding member 14 and the contact portion 16a of the second holding member 16 is P, and the distance from the central axis O of the bridging member 12 is H, the moment M=HP occurs. A strong contact force (reaction force or normal force ) is generated between the support member 20 and the bridging member 12 by the moment M, and the frictional force causes the support member 20 to be fixed without sliding along the bridging member 12. be done. The principle of the universal key is that the moment due to the reaction force received by the first holding member 14 from the outer surface WO is transmitted to the supporting member 20 through the lever 26 and the roller 32, and the frictional force generated between the supporting member 20 and the bridging member 12 is reduced. means to increase.

When it is desired to release the fixation with the outer wall W, the operator grasps the proximal end portion of the lever 26 or the connecting portion 26c and rotates the lever 26 upward in the direction opposite to the arrow R. , the roller 32 separates from the tip end side surface 20c of the support member 20, the first holding member 14 rotates around the rotary shaft 24, and the lower end thereof separates from the outer surface _W.sub.O of the outer wall W. As shown in FIG. As a result, the first clamping member 14 locked to the bridging member 12 by the "principle of a universal key" becomes movable with respect to the bridging member 12, and the wall connecting device 10 can be detached from the outer wall W. .

By loosening the fastener connecting the scaffold and the bridging member 12 and rotating the bridging member 12 about its axis, the second clamping member 16 can be detached from the outer wall W of the building, and the bridging member 12 can be removed from the scaffold. It is possible to pull it to the side. As a result, the wall connecting device 10 is completely separated from the outer wall W of the building and can be recovered to the scaffold side or the building side.

According to this embodiment, the wall tie device 10 includes a bridge member 12 that extends across the top of the outer wall W of the building between the outer wall W of the building and a scaffolding (not shown) to provide a first The lower end of the holding member 14 contacts the side surface (outer surface) _WO of the outer wall W facing the scaffolding, and the second holding member 16 contacts the side surface (inner surface) _WI on the opposite side of the outer wall W. placed. This work can be done by one worker.

Furthermore, according to this embodiment, by applying the "principle of a universal lock", the wall connecting device 10 can be easily fixed to the outer wall W of the building by one worker without using any tools. The proximal end of the bridging member 12 can also be secured to the scaffold by the operator using appropriate fasteners (not shown).

Furthermore, as described above, by providing the stop portion 21, the initial inclination angle φ of the lever 26 before fixing the wall connecting device 10 to the outer wall W becomes constant, and the position of the roller 32 with respect to the support member 20 becomes constant. Therefore, the fixing force or fastening force for pinching the outer wall W between the first and second pinching members 14 and 16 is stabilized. In other words, each time the wall connecting device 10 is fixed to the outer wall W, it becomes substantially constant. If the initial inclination angle φ of the lever 26 is increased, the fixing force or the fastening force increases, but the torque when lowering the lever 26 increases. power is required. Conversely, when the initial inclination angle φ of the lever 26 is reduced, the fixing force or fastening force is also reduced. A suitable initial inclination angle φ of the lever 26 is about 30 to 35°.

Referring now to Figure 6, a variation of the above embodiment is shown. In the embodiment of FIGS. 1 to 5, the lever 26 jumps up abruptly when releasing from the clamped state, and there is a risk that the bridging member 12 and the lever 26 may be jammed. Therefore, in the embodiment of FIG. 6, the lever of the drive mechanism is bent. In addition, in FIG. 6, the same reference numerals are given to the same components as in the embodiments of FIGS.

In the wall connecting device 10' shown in FIG. 6, the lever 26' of the drive mechanism 18' includes a pair of arm portions 26'a and 26'b and base ends of the pair of arm portions 26'a and 26'b. and a connecting portion 26'c for connecting the two to each other. The arm portions 26'a and 26'b are convexly bent toward the bridging member 12 in a "<" shape and arranged on both sides of the support member 20 in planes parallel to each other. As a result, the proximal end portion of the lever 26 ′, particularly the connecting portion 26 ′c, is separated from the bridging member 12 . In particular, since the proximal tip of the lever 26' is separated from the bridging member 12 at the unclamped position, fingers or hands of the operator are prevented from being caught between the lever 26' and the bridging member 12. FIG.

The wall tie device 10' shown in FIG. 6 also has a holding member 34 for holding the lever 26' in the unclamped position and a grip 38 projecting upward from the support member 20. As shown in FIG. The holding member 34 consists of a pair of rod-like or elongated plate-like members whose one ends are welded to the pair of brackets 22a and 22b. In FIG. 6, only one holding member 34 is illustrated. The holding member 34 contacts the side surfaces of the arm portions 26'a and 26'b of the lever 26', and the lever 26' is held by the frictional force generated between the holding member 34 and the arm portions 26'a and 26'b. It is held in an unclamped position.

In this example, when fixing the wall tethering device 10' to the wall W, the fixing operation of the wall tethering device 10' is performed so that the grip 38 can be grasped and the support member 20 can be moved along the bridging member 12. becomes easier. Further, in the wall tether 10', the lever 26' can be held in the unclamped position by the retaining member 34, so that when the wall tether 10' is fixed to the wall W, the first clamping member 14 can be displaced. The work of contacting the outer side surface of the wall W becomes easier. The holding member 34 also serves as a stop for keeping the initial tilt angle φ of the arm 26' constant. As described above, by making the initial inclination angle φ of the arm 26' before fixing to the outer wall W constant and by making the position of the roller 32 with respect to the support member 20 constant, every fixing work of the wall connecting device 19 , the fixing force to the outer wall W surface becomes a substantially constant value.

7 and 8 show yet another embodiment of the present invention. In the embodiment of Figures 7 and 8, the drive mechanism for the first clamping member is adapted to operate from the distal side of the wall tie device. 7 and 8, the wall connecting device 100 includes a bridging member 102, a first clamping member 104 movably connected to the bridging member 102, and a clamping member 104 that intersects the bridging member 102 substantially perpendicularly. and a driving mechanism 108 for driving the first holding member 104 toward and away from the outer wall W. As shown in FIG.

The bridging member 102 consists of a metal rod-like member, preferably a hollow tubular member, having a rectangular cross-section and having sufficient strength to connect the scaffolding to the outer wall W of the building. In this embodiment, bridging member 102 is also attached to the scaffolding at its proximal end.

The first and second clamping members 104, 106 are fixed to the same side of the bridging member 102, that is, the wall tie device 100 to the outer wall W of the building, as in the embodiment shown in FIGS. Sometimes, it is provided so as to protrude downward. In addition, the second holding member 106 is fixed closer to the tip side of the bridging member 102 than the first holding member 104, and in FIGS. is held by an operator to operate the wall connecting device 100. As shown in FIG.

A contact portion 104a and a stopper 104b are provided at the lower end portion of the first holding member 104 (the end portion opposite to the bridging member 102). The contact portion 104 a protrudes toward the second holding member 106 at the lower end of the first holding member 104 . The stopper 104b protrudes toward the base end of the wall connecting device 100 at the lower end of the first holding member 104. As shown in FIG. A contact portion 106 a is provided at the lower end portion of the second holding member 106 . The contact portion 106 a protrudes toward the proximal end of the wall connecting device 100 .

Drive mechanism 108 includes a support member 110 movably mounted along bridging member 102 . Support member 110 may be formed from a generally hollow cuboid member. The support member 110 has an opening penetrating from a proximal side surface 110a to a distal side surface 110b, which are two side surfaces facing each other in the front-rear direction. A bridging member 102 is inserted through the opening.

A pair of brackets 112a, 112b are secured to the transverse sides 110c, 110d of the support member 110. As shown in FIG. A pair of brackets 112a and 112b extend perpendicularly from the support member 110 to the distal end side in parallel with each other on both sides of the support member 110 . An upper end portion of a first holding member 104 is rotatably connected to the tip portions of the pair of brackets 112a and 112b via a rotating shaft 114 extending in the transverse direction. A stop 130 may be provided on one or both of the sides 110c, 110d of the support member . 7 and 8 show that the stop 130 is provided at the proximal end of the bracket 112a, but the position of the stop 130 is not limited to this, and is provided at the proximal end of the bracket 112b. Alternatively, they can be provided at the proximal end portions of both of the pair of brackets 112a and 112b. Alternatively, stops 130 may be provided on transverse sides 110c, 110d of support member 110 other than proximal portions of brackets 112a, 112b.

A pair of arm members 116 a and 116 b are rotatably connected to the lower end of the support member 110 via a rotation shaft 118 . Rollers 122 are rotatably attached to the distal ends of the arm members 116a, 116b by a rotating shaft 120 extending in the transverse direction. The length of the arm members 116a and 116b is determined by the rotational positions of the arm members 116a and 116b about the pivot shaft 118 so that the roller 122 can contact and separate from the proximal side surface 104c of the first clamping member 104. be done.

The drive mechanism 108 also includes a lever 124 that is generally L-shaped. Lever 124 has first and second legs 126, 128 joined together at substantially right angles. A first leg 126 is coupled to the arm members 116a, 116b and a second leg 128 is coupled to the first leg 126 so as to extend from the first leg 126 distally of the wall tie device 100. It is In addition, in this embodiment, a driving lever is formed by the lever 124 and the pair of arm members 116a and 116b.

Note that the crossing angle between the first and second legs 126 and 128 does not necessarily have to be a right angle, and can be appropriately determined depending on the conditions of use, the size of the wall connecting device 10, and the like. By making the intersection angle of the second leg portions 126 and 128 slightly obtuse, the gap between the connecting member 124a at the tip of the second leg portion 128 and the bridging member 102 can be increased in the clamped state. As a result, the operator's hand is prevented from being caught between the connecting member 124a and the bridging member 102, and the safety of the wall connecting device 10 can be enhanced.

The first leg 126 can be formed from a pair of plate members 126a, 126b coupled to each of the arm members 116a, 116b. Each of plate members 126a, 126b is coupled at one end thereof to arm member 116a, 116b. More specifically, each of plate members 126a and 126b is coupled to a portion between rotating shaft 118 and rotating shaft 120 in arm members 116a and 116b. Preferably, plate members 126a, 126b are coupled perpendicularly to arm members 116a, 116b, respectively.

The second leg 128 is formed from plate members 128a, 128b coupled to the plate members 126a, 128b of the first leg 126, respectively. The plate members 128a, 128b of the second leg 128 are arm members at the plate members 126a, 128b of the first leg 126 at one end of each, more particularly the proximal end of the wall tie device 100. It can be connected to the end (upper end) opposite to the end connected to 116a, 116b. The plate members 128a and 128b of the second leg 128 are connected to each other by a connecting member 124a at their distal ends. Both ends of the second leg 128 at the proximal end are connected to each other by connecting members 124a and 124b. The connecting member 124a on the distal end side acts as a handle or grip when the lever 124 is operated.

The operation of this embodiment will be described below.
As shown in FIGS. 7 and 8, a first clamping member 104 contacts the outer surface W _O of the outer wall W of the building and a second clamping member 106 contacts the inner surface W _I of the outer wall W, the proximal end of the bridging member 102 A wall tie device 100 is placed between the scaffolding and the outer wall W so that the side extends toward the scaffolding. When arranging the wall connecting device 100 between the scaffolding and the outer wall W, the support member 110 of the driving mechanism 108 is moved along the bridging member 102, and the abutment portions 104a of the first and second holding members 104 and 106 are moved. , 106a contact the outer surface Wo and the inner surface _WI of the outer wall W, respectively.

More specifically, first, the bridging member 102 is pulled proximally until the contact portion 106a of the second holding member 106 comes into contact with the wall inner surface _WI . Lever 124 is then rotated upward until it abuts stop 130 and is moved to the unclamped position. With the lever 124 held at the unclamped position, the support member 110 is slid along the bridging member 102 toward the wall, and the contact portion 104a at the lower end of the first holding member 104 touches the outer surface W _O of the outer wall W. abut.

At this time, the first clamping member 104 rotates about the rotation shaft 114 and the lever 124 rotates about the rotation shaft 118, so that the tip (lower end) of the first clamping member 104 Substantially simultaneously with contacting the outer surface W _O of the outer wall W, the roller 122 contacts the proximal side surface 104 c of the first holding member 104 . This work can be done by a worker from the building side.

When the wall tether 100 is placed between the scaffolding and the outer wall W, the lever 124 of the drive mechanism 108 is in the unclamped position, which is the upward rotational position about the pivot 118 .

In this embodiment, when the worker on the side of the outer wall W (building side) to which the wall connecting device 100 is fixed pushes down the lever 124 around the pivot shaft 118 , the roller 122 moves the first clamping member 104 . It moves downward around the pivot shaft 118 together with the lever 124 until it engages with the stopper 104b provided at the lower end of the proximal side surface 104c. In this specification, the rotational position where roller 122 engages stopper 104b is referred to as the clamp position.

While rotating the lever 124 toward the clamping position in the direction indicated by the arrow R, the roller 122 contacts the proximal side surface 104c of the first clamping member 104. When the lever 124 is further rotated, the lever 124 is moved to the proximal end. The wall connecting device 100 is urged toward the distal end by the roller 122 in contact with the end side surface 104c. As a result, the first holding member 104 rotates about the rotation shaft 114, and the contact portion 104a at the lower end thereof presses the outer surface _W.sub.O of the outer wall W, as shown in FIGS. After that, when the lever 124 is further pushed down and the roller 122 is engaged with the stopper 104b, the lever 124 stops at the clamp position.

When the lever 124 is at the clamping position, the contact portion 104a of the first holding member 104 is pressed against the outer surface _WO of the outer wall W by the biasing force of the roller 122. As shown in FIG. As a result, the outer wall W is clamped by the contact portion 104a of the first clamping member 104 and the contact portion 106a of the second clamping member 106, and the wall connecting device 100 is fixed to the outer wall W.

The wall tie device 100 is such that the contact portions 104a, 106a of the first and second clamping members 104, 106 are arranged substantially on the same horizontal line when the lever 124 is in the clamping position. This is because if the heights of the two are different, a bending moment acts on the bridging member 102, which is not preferable.

Furthermore, in the clamping position, the distal end side (left side in FIGS. 7 and 8) of the arm members 116a and 116b is lower than the proximal end side, or the position of the rotation shaft 120 of the roller 122 is higher than the position of the rotation shaft 118. It's getting lower. As a result, when the lever 124 rotates from the clamping position to the unclamping position, the support member 110 must once rotate in a direction in which the lower end thereof separates from the outer wall W, so that the lever 124 remains in the clamping position. to the unclamped position.

In the clamped position, the support member 110 is biased by the arm members 116a and 116b in a direction away from the outer wall W at the lower end thereof, whereby the support member 110 is attached to the bridging member 102 by the principle of the "universal hook" as described above. locked against.

When it is desired to release the fixation with the outer wall W, a worker on the side of the outer wall W (building side) to which the wall connecting device 100 is fixed grasps the tip end (connecting member 124a) of the lever 124, and pulls the lever 124. is rotated upward in the direction opposite to the arrow R, the roller 122 is separated from the base end side surface 104c of the first holding member 104, and the first holding member 104 is rotated around the rotation shaft 114. As a result, the contact portion 104a separates from the outer surface _WO of the outer wall W. As a result, the support member 110 locked with respect to the bridging member 102 by the "principle of a universal key" becomes movable with respect to the bridging member 102, and the wall connecting device 100 can be detached from the outer wall W.

By loosening the fastener connecting the scaffolding and the bridging member 102 and rotating the bridging member 102 about its axis, the second clamping member 106 can be detached from the outer wall W of the building, and the bridging member 102 can be removed from the scaffolding. It is possible to pull it to the side. Thereby, the wall connecting device 100 is completely separated from the outer wall W of the building, and can be recovered to the scaffold side or the building side.

In this embodiment, the wall tie device 100 includes a bridge member 102 extending across the top of the exterior wall W of the building between the exterior wall W of the building and a scaffolding (not shown) to provide a first clamping The contact portion 104a of the member 104 contacts the side surface (outer surface) W _O of the outer wall W facing the scaffolding, and the contact portion 106a of the second holding member 106 contacts the side surface (inner surface) W _I on the opposite side of the outer wall W. placed in contact with the

Furthermore, as described above, by providing the stop portion 130, the initial inclination angle φ of the lever 124 before fixing the wall connecting device 100 to the outer wall W becomes constant. The position of 122 becomes constant, and the fixing force or fastening force with which the outer wall W is sandwiched by the first and second holding members 104 and 106 is stabilized (the fixing force to the outer wall W surface increases each time the wall connecting device 100 is fixed). approximately constant value). A suitable initial inclination angle φ of the lever 124 is approximately 30 to 35 degrees. In this embodiment, the tilt angle φ is defined by the rotational positions of the arm members 116a and 116b.

In this embodiment, the operation of the lever 124 of the drive mechanism 108 can be performed by a worker on the side of the outer wall W (the side of the building) to which the wall tie device 100 is fixed. For example, an assembly of the first clamping member 14 and the drive mechanism 18 shown in FIGS. 1 to 6 and an assembly of the first clamping member 104 and the drive mechanism 108 shown in FIGS. 7 and 8 are prepared. If so, it becomes possible to select whether to fix the wall connecting device 10 from the scaffolding side or the wall connecting device 100 from the building side according to the situation of the site where the wall connecting device is installed. .

Furthermore, according to this embodiment, by applying the "principle of universal lock", the wall connecting device 100 can be easily fixed to the outer wall W of the building by one worker without using any tools. The proximal end of bridging member 102 can also be secured by a single operator using suitable fasteners (not shown) to the scaffold.

As already mentioned, the support members 20, 110 are formed with openings through which the bridging members 12, 102 are inserted. The openings are preferably offset from each other as described in detail below. The opening has a slightly larger diameter than the diameter of the bridging members 12 and 102 in order to allow the bridging members 12 and 102 to pass therethrough. The fastening force based on the "universal key principle" changes rapidly.

Without the offset, the slight gap between the bridging member 12, 102 and the opening causes the support member 20, 102 to move downward when a horizontal force acts on the lower end of the support member 20, 102. part rotates away from the outer wall W. If the horizontal displacement of the lower ends of the support members 20 and 102 due to this rotation is too large, the roller 32 may move from the distal side surface 20 c of the support member 20 or the roller 122 may move from the proximal side surface of the first holding member 104 . 104c, and the outer wall W cannot be clamped by the first and second clamping members 14, 16;

By slightly offsetting the centers of the openings in the vertical direction, the bridging members 12, 102 cross the support members 20, 110 not perpendicularly but slightly obliquely. By offsetting the openings so that the lower ends of the support members 20 and 110 approach the outer wall W, it is possible to increase the fastening force. Conversely, if the lower ends of the support members 20 and 110 are separated from the outer wall W, the fastening force is rapidly reduced and fastening becomes impossible. The offset amount will be described in detail below.

In FIG. 9, support members 20, 110 are formed from hollow members having a rectangular cross-section. Support member 20, 110 has a distal side wall 150 that defines side 150a that provides distal side 20c, 110b, and a proximal side wall 152 that defines side 152b that provides proximal side 20b, 110a. is doing. The proximal side wall 152 and the distal side wall 150 have openings 156 and 154 as openings penetrating from the proximal side surfaces 20b and 110a, which are two side surfaces facing in the front-rear direction, to the distal side surfaces 20c and 110b. ing.

9, distal opening 154 and proximal opening 156 have respective central axes O1 and O2. The central axes O1, O2 are substantially perpendicular to the proximal side surfaces 20b, 110a and the distal side surfaces 20c, 110b of the support members 20,110.

As shown in FIG. 9, each of the openings 154, 156 has a diameter D and their respective central axes O1, O2 are offset from each other in the longitudinal direction of the support members 20, 110 by a distance .delta.. As shown in FIG. Also, the distal side wall 150 and the proximal side wall 152 of the support member have a plate thickness t.

A columnar (solid) or cylindrical (hollow) member 160 (hereinafter simply referred to as a rod member 160) having a diameter d that provides the bridging members 12 and 102 is inserted through the openings 154 and 156 . Since the central axes O1 and O2 are offset from each other in the longitudinal direction (vertical direction) of the support members 20 and 110, the rod member 160 is inclined at an angle .theta. with respect to the central axes O1 and O2. That is, the central axis O of the bar member 160 forms an angle θ with respect to the central axes O1 and O2.

Now, as shown in FIG. 9, points of contact of the bar member 160 with the peripheral edges of the openings 154 and 156 on the distal side surface 150a and the proximal side surface 152b are A and B, and the point of contact A is the origin. , the y-axis is defined in the longitudinal direction (vertical direction) of the support members 20 and 110, and the x-axis is defined in the front-rear direction perpendicular thereto (horizontal direction in FIG. 9).

At this time, the coordinates of the contact point B are obtained by the following formula (1).

であるので、

となる。従って、

である。 Let C be the point of intersection between a straight line passing through the point of contact B and parallel to the y-axis and the surfaces of the bridging members 12 and 102 . Assuming that the distance between the contact point B and the intersection point C is H,

Since

becomes. Therefore,

is.

とすると、

となる。今、仮にδ＝１０ｍｍ、ｂ＝１４０ｍｍ、ｄ＝３５ｍｍ、Ｄ＝４２ｍｍとすると、分子にある±の符号が＋の場合、ξ＝０．９９２９１８、θ＝６．８２°となる。また、分子にある±の符号が－の場合、ξ＝－０．８２９７１９、θ＝１４６．１°となり、＋の方が正解となる。従って、以下の式（５）を得る。

Equation (3) is an equation for θ, so

and

becomes. Assuming that δ=10 mm, b=140 mm, d=35 mm, and D=42 mm, ξ=0.992918 and θ=6.82° when the sign of ± in the numerator is +. Also, when the sign of ± in the numerator is -, ξ=-0.829719 and θ=146.1°, and + is the correct answer. Therefore, the following formula (5) is obtained.

Next, in FIG. 9, an intersection point E is defined as an intersection point between a straight line extending parallel to the y-axis along the tip side surface 152a and the surfaces of the bridging members 12 and 102. As shown in FIG. Further, let F be the intersection of a straight line extending parallel to the y-axis along the tip-side side surface 152a and the peripheral edge of the opening 156 in the tip-side side surface 152a. In FIG. 9, the y-coordinates of intersection points E and F can be obtained from the following equations (6) and (7)

Therefore, the distance (gap) ε between the intersections E and F can be obtained from the following equation (8).

Here, if ε>0, the rod member 160 can be inserted through the openings 154 and 156, but if ε<0, it cannot be inserted. For example, if δ=10 mm, b=140 mm, d=35 mm, D=42 mm, t=10 mm, and θ=6.82°, ε=5.55 mm from equation (8). When ε=0, the thickness of the distal side wall 150 and the proximal side wall 152 of the support member is t _(ε=0) =56.44 mm according to equation (8).

Reference Signs List 10 wall connecting device 12 bridging member 14 first clamping member 16 second clamping member 16a contact portion 18 drive mechanism 20 support member 20a stopper 20b proximal side surface 20c distal side surface 20d side surface 20e side surface 21 stopping portion 22a bracket 22b Bracket 24 Rotating shaft 26 Lever 26a Arm portion 26b Arm portion 26c Connecting portion 28 Rotating shaft 30 Rotating shaft 32 Roller 34 Holding member 38 Grip 100 Wall connecting device 102 Bridge member 104 First clamping member 104a Contact portion 104b Stopper 104c Base end side surface 106 Second clamping member 106a Contact portion 108 Drive mechanism 110 Support member 110a Base end side surface 110b Distal side surface 110c Side surface 110d Side surface 112a Bracket 112b Bracket 114 Rotating shaft 116a Arm member 116b Arm member 118 Rotation Shaft 120 Rotating shaft 122 Roller 124 Lever 124a Connecting member 124b Connecting member 126 First leg 126a Plate member 126b Plate member 128 Second leg 128a Plate member 128b Plate member 130 Stopper 150 Tip side wall 150a Tip side side 152 Base end side wall 152a Distal end side surface 152b Base end side surface 154 Opening 156 Opening 160 Rod member

Claims (8)

A rod-shaped bridging member that bridges between a wall of a building and scaffolding arranged around the building;
a first sandwiching member connected to a tip portion of the bridge member on the wall side of the building so as to be movable along the bridge member;
a second clamping member fixed to the bridging member so as not to move along the bridging member further to the distal end side than the first clamping member;,
a support member movably provided along the bridging member; a bracket rotatably connecting the first holding member to the support member; a driving lever for pressing the first clamping member toward the wall that is located between the first clamping member and the first clamping member toward the wall that is clamped between the first and second clamping members. a drive mechanism;
The drive lever has a roller engageable with the support member, and is connected to the lower end of the first holding member so as to be rotatable between an unclamping position and a clamping position. cage,
in the unclamped position the roller is separated from the support member and in the clamped position the roller engages the support member;
Rotation of the drive lever relative to the first clamping member from the unclamping position to the clamping position causes the roller to engage the support member to direct the drive lever toward the first clamping member. is energized by The wall of the building is sandwiched between the first and second sandwiching members, and the first sandwiching member is locked so as not to move along the bridging member by the principle of a universal hook. wall tie device. A rod-shaped bridging member bridged between the building wall and scaffolding arranged around the building;
a first sandwiching member connected to a tip portion of the bridging member on the wall side of the building so as to be movable along the bridging member;
a second clamping member fixed to the bridging member so as not to move along the bridging member further to the distal end side than the first clamping member;
a support member movably provided along the bridging member; a bracket rotatably connecting the first holding member to the support member; and a drive lever for pressing the first clamping member toward the wall that is located between the first clamping member and the wall clamped between the first and second clamping members. a drive mechanism;
The drive lever has a roller engageable with the first holding member, and is connected to the lower end of the support member so as to be rotatable between an unclamping position and a clamping position. cage,
In the unclamping position the roller is separated from the first clamping member, and in the clamping position the roller is engaged with the first clamping member;
Rotation of the drive lever relative to the support member from the unclamped position to the clamped position causes the drive lever to be urged toward the support member by the roller engaging the first clamping member. the wall of the building is thereby clamped between the first and second clamping members, and the first clamping member is locked against movement along the bridging member on the principle of a universal hook. A wall connecting device characterized by: In the wall tie device, the bridging member extends across the top of the wall of the building and between the wall of the building and the scaffolding, and one end of the first clamping member extends from the wall of the building. 3. A wall tie according to claim 1 or 2 , wherein the second clamping member is arranged to contact the opposite side of the wall of the building at the side facing the scaffolding. The support member has an opening through which the bridging member is inserted,
The support member is urged by the roller in a direction in which the lower end thereof is separated from the wall of the building, thereby generating a moment between the support member and the bridging member of the drive mechanism. 3. The structure according to claim 1, wherein a normal force is generated between said supporting member and said bridging member, and the frictional force of the normal force causes said supporting member to be fixed so as not to slide along said bridging member. wall tie device. The opening has an opening formed in a side surface facing the distal end side of the wall connecting device and an opening formed in a side surface facing the proximal end side of the wall connecting device in the support member. 5. A wall tether according to claim 4 , wherein the two openings are offset from one another in their centers longitudinally of the support member. 2. The wall connecting device according to claim 1, wherein said second clamping member has an abutment portion provided so as to be able to abut on the surface of the wall of said building. 2. The wall tie device of claim 1 further comprising a stop engaging said drive lever to maintain a constant position of said roller relative to said support member when said drive lever is in an unclamped position. 3. The wall tie of claim 2 , further comprising a stop engaging said drive lever to maintain a constant position of said roller relative to said first clamp member when said drive lever is in an unclamped position. Device.

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