JP2019019499A - Wall connecting device - Google Patents

Abstract

To easily and surely fix a wall connecting device to an outer wall of a building by one worker from a scaffold.SOLUTION: A wall connecting device 10 comprises: a rod-like bridging member 12 bridged between a wall of a building and a scaffold arranged around the building; an outer plate 14 connected to a distal end at the wall side of the building in the bridging member so as not to be moved along the bridging member; and an inner plate 18 provided on the distal end side from the outer plate in the bridging member so as to be movable along the bridging member. The wall of the building is held between the outer plate and the inner plate, and the inner plate is locked so as not to be moved along the bridging member by the principle of a free hook.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wall connecting device that connects a scaffold temporarily provided around a building when a building is dismantled or an outer wall is remodeled to an outer wall of the building (hereinafter referred to as an outer wall of the building).

  In Patent Document 1, a first sandwiching body and a second sandwiching body are provided separately on one end side of a horizontal bar, and an outer wall of a building is sandwiched and fixed between the first sandwiching body and the second sandwiching body. A wall splicing device is described. In this wall splicing device, a plurality of holes are formed in the horizontal bar in the longitudinal direction. By aligning the holes and the holes formed in the second sandwiching body and inserting the connecting pin, The distance between the first sandwiching body and the second sandwiching body can be adjusted by allowing the two sandwiching bodies to be fixed at a plurality of positions along the horizontal bar. Furthermore, an adjustment screw shaft is disposed on the second holding member so that it can be adapted to outer walls of various thicknesses.

Japanese Patent Application Laid-Open No. 09-310483

  The wall joining device of Patent Document 1 can be adapted to outer walls of various thicknesses, but in order to fix the second sandwiching body to the horizontal bar, the through hole of the second sandwiching body and the through hole of the horizontal bar Is fixed, the connecting pin is inserted therethrough, and the adjusting screw shaft is tightened, and it is difficult for the operator to perform these fixing operations from the fixed scaffold. Therefore, in order to fix the wall joining apparatus of Patent Document 1 to the outer wall and the scaffolding of the building, an operator is arranged on the building side and the scaffolding side, or the worker gets out of the scaffolding and performs the fixing work. There is a problem that must be done.

  The present invention has a technical problem to solve such problems of the prior art, and can be securely fixed to the outer wall of a building and can be easily attached to and detached from the outer wall by one operator from a scaffold. The purpose is to provide.

  In order to achieve the above-mentioned object, according to the present invention, a rod-shaped bridging member spanned between a building wall and a scaffold disposed around the building, and the building member includes a wall of the building. An outer plate connected so as not to move along the bridging member to the distal end portion on the side, and an inner plate provided on the bridging member so as to be movable along the bridging member on the tip side of the outer plate. There is provided a wall connecting device that holds the wall of the building between the outer plate and the inner plate, and locks the inner plate so that the inner plate cannot be moved along the bridging member by the principle of a free key. The

  According to the present invention, the operator holds the building wall between the outer plate connected so as not to move along the bridging member and the inner plate movably provided along the bridging member. The wall connecting device can be arranged so that the bridging member is bridged between the scaffolding disposed around the building and the building wall. Then, by locking the inner plate so that it cannot move along the bridging member by the principle of a free key, the wall connecting device can be firmly fixed to the wall of the building.

1 is a perspective view of a wall tethering device according to a preferred embodiment of the present invention. It is a side view of the wall joining apparatus of FIG. It is the schematic for demonstrating the principle of a free key.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
1 and 2, a wall connecting device 10 includes a bridge member 12 that connects a scaffold (not shown) assembled on the outside of a building to an outer wall W of the building, and is rotatably connected to the bridge member 12 by a pin 16. A first holding member or outer plate 14 to be moved, a second holding member or inner plate 18 movably attached along the bridging member 12, a pressing lever 20 coupled to one end of the outer plate 14, A string-like member 22 inserted into the pressing lever 20 and connected to the inner plate 18 at the distal end portion 22a, and a locking device 25 for the pressing lever 20 are provided.

  The bridging member 12 is made of a rod-shaped member having a rectangular metal cross section, preferably a hollow tubular member, having sufficient strength to connect the scaffold to the outer wall W of the building. In the present embodiment, the outer plate 14 is made of a steel plate having a web 14a and flanges 14b provided on both sides of the web 14a and having a U-shaped cross section. An opening 14c to be inserted is formed. The outer plate 14 is rotatably connected to the bridging member 12 by a pin 16 at the flange 14b.

  In the present embodiment, the inner plate 18 is made of a steel having a web 18a and flanges 18b provided on both sides of the web 18a and having a U-shaped cross section. A rectangular opening 18c is formed through which is inserted. Moreover, the contact part 18d which protrudes from the surface which faces the outer wall W of a building in the web 18a is provided. The abutting portion 18d is preferably formed such that a tip portion that abuts on the outer wall W is a spherical surface or a cylindrical surface, and is integrally coupled to the web 18a by a coupling method such as welding. The inner plate 18 is movably attached along the bridging member 12 on the distal end side of the outer plate 14 in the bridging member 12 by inserting the bridging member 12 through the opening 18c.

  The pressing lever 20 is made of a hollow metal pipe member, and is coupled to the upper end portion of the outer plate 14 via a bracket 34. In the present embodiment, the bracket 34 is coupled to the upper end portion of the outer plate 14 by an appropriate coupling method such as welding. In this embodiment, the pressing lever 20 is detachably attached to the bracket 34 by appropriate fastening means such as a U bolt. A string-like member 22 extends through the inside of the pressing lever 20. The string-like member 22 can be formed of a wire, a rope, or the like, and the distal end portion 22a is divided into two forks and connected to both flanges 18b of the inner plate 18. In the string-like member 22, a grip or a grip (not shown) that assists the operator in gripping may be provided at the end opposite to the tip 22a.

  The locking device 25 includes a rod 24 that extends in the transverse direction with respect to the bridging member 12, and a locking lever 28 that locks the rod 24. The rod 24 is rotatably connected to a portion of the pressing lever 20 adjacent to the distal end that is separated from the coupling portion with the outer plate 14 by a pin 26. The locking lever 28 is formed of an angle member and is rotatably connected to the side surface of the bridging member 12 by a pin 32. The locking lever 28 has a through hole through which the rod 24 is inserted. In addition, a grip 30 made of, for example, a U-bolt is attached to the locking lever 28 for gripping and operating the locking lever 28 by an operator.

Hereinafter, the operation of the present embodiment will be described.
First, as shown in FIGS. 1 and 2, the outer plate 14 contacts the outer surface of the outer wall W of the building, the inner plate 18 contacts the inner surface of the outer wall W, and the bridging member 12 and the pressing lever 20 extend to the scaffold side. The wall connecting device 10 is disposed between the scaffold and the outer wall W. This work can be performed from the scaffold by the worker.

  Next, the bridging member 12 is pressed toward the outer wall W, and the tip of the outer plate 14 contacts the outer surface of the outer wall W. When the operator pulls the string-like member 22, the inner plate 18 slides along the bridging member 12, and the contact portion 18 d comes into contact with the inner surface of the outer wall W. When the operator grasps and pushes down the tip end portion of the pressing lever 20, a moment about the pin 16 acts on the outer plate 14 as shown by an arrow A in FIG. The lower end is strongly pressed against the outer surface of the outer wall W.

  At the same time, due to the reaction force of the outer plate 14 being pressed against the outer surface of the outer wall W, the contact portion 18d of the inner plate 18 is also pressed against the inner surface of the outer wall W, and the bridging member 12 is firmly fixed to the outer wall W. The At this time, the inner plate 18 is locked to the bridging member 12 and cannot slide by the principle of a free key. That is, when the contact portion 18d is pressed against the outer wall W, a moment in the opposite direction (counterclockwise direction) acts on the inner plate 18 due to a reaction force from the outer wall W acting on the contact portion 18d. However, a strong contact force (reaction force or vertical effect) is generated between the inner plate 18 and the bridging member 12 so as to balance the moment, and the inner plate 18 is locked onto the bridging member 12 by the frictional force. The This is the principle of free key. In the present embodiment, the principle of the free key means that the frictional force generated between the inner plate 18 and the bridging member 12 is increased by the moment due to the reaction force that the inner plate 18 receives from the outer wall W.

With reference to FIG. 3, which is a schematic diagram showing a dynamic model between the inner plate 18 and the outer wall W, the principle of the free key will be described in more detail. In FIG. 3, N is a force acting between the bridging member 12 and the opening 18c of the inner plate 18, that is, the side far from the outer wall W with respect to the bridging member 12 of the bridging member 12 and the opening 18c of the inner plate 18 (see FIG. 3, the inner plate 18 receives from the bridging member 12 at the contact point P ₁ with the inner edge on the upper side) and the contact point P ₂ with the inner edge on the side close to the outer wall W (lower side in FIG. 3) with respect to the bridging member 12 of the opening 18 c. Reaction force (vertical effect). R is a reaction force (vertical effect) that the contact portion 18d of the inner plate 18 receives from the outer wall W. Here, it should be noted that R is equal to a force for pulling the bridging member 12 from the opening 18c of the inner plate 18 in the longitudinal direction (left direction).

Assuming that the distance in the longitudinal direction of the bridging member 12 between the contacts P ₁ and P ₂ (the direction along the central axis of the bridging member 12) is B, the following formula (1) is obtained from the balance of moments around the contact P _1. Get.

Here, the condition for the bridging member 12 not to slide with respect to the inner plate 18 is that μ is a friction coefficient.

となる。一例として、実寸であるＢ＝５ｍｍ、Ｈ＝１５０ｍｍを式（３）に代入すると、μ＝０．０１７となる。通常鉄同士の摩擦係数は０．２程度であるので、０．２／０．０１７＝１１．８と安全率は１０以上あり、摩擦力でも十分強固に固定可能なことが分かる。 From equations (1) and (2)

It becomes. As an example, if B = 5 mm and H = 150 mm, which are the actual dimensions, are substituted into Equation (3), μ = 0.17. Since the friction coefficient between irons is usually about 0.2, the safety factor is 0.2 / 0.017 = 11.8, which is 10 or more.

  When the operator holds the grip 30 of the locking lever 28 and pulls it upward while the pressing lever 20 is pushed down, the rod 24 is locked to the locking lever 28 by the principle of a free key, and the pressing lever 20 is bridge member. 12 is firmly locked. Finally, if the bridging member 12 and the scaffold are fixed with a commonly used fixing bracket (not shown), the scaffold is completely fixed to the wall. These series of operations can be performed in a few seconds while the operator is on the scaffold.

  When it is desired to release the fixation with the outer wall W, the operator holds the grip 30 and pushes down the locking lever 28, whereby the locking lever 28 rotates about the pin 32, and the rod 24 moves to the locking lever 28. It is possible to move freely in the through-holes, and the lock is released instantly. At this time, if the front end portion of the pressing lever 20 is also pushed down at the same time, the locking lever 28 can be pushed down easily.

  By loosening the fastener that connects the scaffold and the bridging member 12 and rotating the bridging member 12 about its axis, the inner plate 18 can be detached from the outer wall W of the building, and the bridging member 12 is pulled into the scaffold side. It becomes possible. Thereby, the wall joining apparatus 10 is completely separated from the outer wall W of the building and can be collected on the scaffold side.

  In the above-described embodiment, the opening 18c of the inner plate 18 is formed in a rectangular shape, but the principle of the free key works effectively even if the opening 18c has a shape other than a rectangle. The opening 18c may be circular instead of rectangular, for example.

DESCRIPTION OF SYMBOLS 10 apparatus 12 bridging member 14 outer plate 14a web 14b flange 14c opening part 16 pin 18 inner plate 18a web 18b flange 18c opening part 18d contact part 20 pressing lever 22 string-like member 22a tip part 24 rod 25 locking device 26 pin 28 Locking lever 30 Grip 32 Pin 34 Bracket

Claims (8)

A rod-shaped bridging member that spans between a wall of the building and a scaffold disposed around the building;
An outer plate connected so as not to move along the bridging member to the tip of the building on the wall side of the bridging member;
An inner plate provided movably along the bridging member on the leading end side of the outer plate in the bridging member;
A wall joining apparatus characterized in that a wall of the building is sandwiched between the outer plate and the inner plate, and the inner plate is locked so as not to move along the bridging member by the principle of a free key.   The wall connecting apparatus according to claim 1, wherein the inner plate has a contact portion provided so as to be able to contact the surface of the wall of the building. The outer plate has an opening through which the bridging member is inserted, and is rotatably connected to the bridging member by a pin, and the inner plate has an opening through which the bridging member is inserted,
In the wall connecting device, the bridging member extends across the top of the building wall between the building wall and the scaffold, and one end of the outer plate is located on the building wall. The wall connecting apparatus according to claim 1, wherein the wall connecting device is disposed so as to contact a side surface facing the wall and the inner plate is configured to contact a side surface opposite to the wall of the building.   A pressing lever for pressing the one end of the outer plate against the outer surface of the building wall, which is coupled to the end of the outer plate opposite to the end contacting the wall of the building with respect to the pin; The wall joining apparatus of Claim 3 which comprises.   A cord-like member connected to the inner plate is further provided, and the inner plate is moved toward the outer plate along the bridging member by pulling the cord-like member from the scaffold. 4. A wall joining apparatus according to 4.   The wall connecting device according to claim 5, wherein the pressing lever is formed of a hollow member, and the string-like member is inserted into a hollow portion of the pressing lever.   The wall joining apparatus according to claim 5, further comprising a locking device that fixes the pressing lever at a position where the outer plate is pressed against the outer surface of the building wall.   The locking device includes a rod extending from the pressing lever toward the bridging member, and a locking lever that is rotatably attached to the bridging member and locks the rod. A wall joining device as described in 1.

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