JP2008280740A - Connector for erection structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the accidental disconnection of a connector, the generation of a noise, etc., in an erection structure. <P>SOLUTION: In this connector for the erection structure, an arc-shaped front recessed portion 10 is formed on the rear surface of a central wall 5 of a retainer fitting 2; a crescent rear recessed portion 22 is formed on the front surface of an end surface plate 7 of a rod-shaped horizontal member 3; a rotator 11 is attached to a horizontal protrusion which is elongated forward from the end surface plate 7 and the leading end of which has a locking claw; a front protruding portion 14 with an arcuate edge 14a is formed on the retainer fitting 2 side of the rotator 11; a rear protruding portion 15 with a edge 15a is formed on the end surface plate 7 side of the rotator 11; an arc surface 10a of the front recessed portion 10 and the arcuate edge 14a of the front protruding portion 14 have the center of an arc as the center O1 of the central axis 12 of rotation; the arcs have radii which allow the front protruding portion 14 to be tightly fitted into the front recessed portion 10 in locking, respectively; an arc surface 22a of the rear recessed portion 22 and an arc edge 15a of the rear protruding portion 15 have the center of an arc as a point O2 away downward from the center O1 of the central axis 12 of rotation; and the arcs have radii which allow the rear protruding portion 15 to be tightly fitted into the rear recessed portion 22 in locking, respectively. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a connecting device in a erected structure, and more particularly to a linking device that connects a column and a bar-like horizontal member that constitute an erected structure such as a temporary scaffold.

  In this specification, in the relationship between the column and the bar-shaped horizontal member, the front side refers to the side with the column to be connected, and the rear side refers to the side with the bar-shaped horizontal member to be connected.

  The conventional connecting device includes a receiving metal fixture fixed to the outer periphery of a predetermined height of a support structure pillar, and a wedge-shaped locking metal object fixed to an end of a bar-shaped horizontal member passed between the two support columns. The wedge-shaped locking metal fitting is connected to the column and the bar-shaped horizontal member by hitting the metal fitting with the hammer from above with the hammer. Also, when releasing the connection between the column and the bar-shaped horizontal member, the wedge-shaped locking bracket of the bar-shaped horizontal member is released from below with a hammer from the column receiving bracket, or the locking is released. The end of the bar-like horizontal member near the top is lifted from below with a hammer to release the lock of the wedge-shaped lock fitting fixed to the end. Therefore, since noise is generated in both the connection and release operations, there has been a problem of causing trouble around the construction site. Furthermore, as shown above, the connection between the column and the bar-shaped horizontal member is simply done by firmly inserting the wedge-shaped locking bracket into the receiving bracket, so it passes under the bar-shaped horizontal member with a large tool. If the tool or material hits the rod-like horizontal member when an unexpected force is applied to the rod-like horizontal member from below, the wedge-shaped locking bracket will be loosened. There was a risk that the wedge-shaped locking bracket could come off from the receiving bracket.

  In order to prevent unintentional release of the connection, one of the present applicants has proposed a temporary structure connecting device as disclosed in Patent Document 1 below. In this proposed apparatus, the receiving bracket is U-shaped when viewed from above, and has an upper opening vertical groove in the center of the width of the central wall. The locking bracket extends forward from the end face plate of the bar-shaped horizontal member, and A horizontal protrusion with a rectangular cross section that fits into a vertical groove in the central wall, a locking claw that is provided at the tip of the horizontal protruding part and is inserted between the central wall of the receiving bracket and the column, and behind the locking claw , It is hooked slidably back and forth on a horizontal projection by a downward opening vertical groove formed in the center, and has a forward-facing horizontal convex part at the lower end, and is locked in a vertical rectangular shape when viewed from the front and reversely when viewed from the side. A spring-made central wall clamping member that clamps the central wall with claws, and is hooked up and down on the horizontal protrusion between the clamping member and the end plate so that it can be moved up and down, inverted U-shaped when viewed from the front, and inverted L when viewed from the side The upper half is wide, the lower half is narrow, and it falls out at both lower ends. In which and a wedge member that because pins are passed.

Also, a temporary structure connecting device as disclosed in Patent Document 2 below has been proposed to prevent the unexpected connection release and noise generation. In this proposed device, the receiving bracket is U-shaped when viewed from above, and the central wall is inclined downward toward the support column, and the locking bracket is integrally formed at the upper end with an inverted U-shaped cross section and is in the form of a rod. It has a semi-cylindrical part that is fitted and fixed to the end of a horizontal member, and both side wall edges are inclined downwards in accordance with the inclination angle of the central wall of the bracket, and is inserted between the bracket and the column. Also, there is a locking claw that has a gentler abutting edge near the upper end of both side wall edges and has a lower end projecting downward from the receiving metal fitting, and a locking claw having a reverse cross-section of the transverse cross section. It is integrally formed on both sides of the lever and the upper edge of the lever. By being slightly biased forward, a locking edge is formed near the lower end of the arc portion. The upper end is attached to the inside of the center wall of the locking claw that has an upward protruding ear that forms a corner at the top of the front edge, and the reverse claw of the transverse cross section, and the lower free end is when the lever is hanging It is provided with a leaf spring for holding the posture of a retaining member that comes into contact with the upper front edge of the upper protruding ear portion and comes into contact with the upper edge of the upper protruding ear portion when the lever is horizontal.
JP 2003-56176 A JP 2006-45822 A

  According to the proposed apparatus disclosed in Patent Document 1, after the locking claw of the locking metal fitting is inserted between the central wall of the metal fitting and the support column, the upper end of the wedge member that is in the raised position at the time of releasing the connection is Tap the upper half-width part and lower the upper half-width part to move the spring-shaped central wall clamping member against the spring force, clamp the central wall with the locking claw, and connect the column and the horizontal bar member Therefore, the spring force of the central wall clamping member is working at the time of connection, and the wedge member is not easily pulled up. However, since the spring center wall clamping member has an inverted shape, V-shaped and inverted V-shaped gaps are formed above and below the upper half wide portion of the wedge member. Therefore, the bar-like horizontal member is slightly unstable and unstable with respect to the support column. Further, since the wedge member must be hit with a hammer several times during connection and release, there is a problem of noise generated at that time, although not as much as in the prior art.

Further, according to the proposed device disclosed in Patent Document 2, after the locking claw is inserted between the metal fitting and the column, the lever of the retaining member that protrudes downward from the locking claw and is in a suspended state is horizontally disposed. The arcuate part of the ear is moved to contact the lower edge of the central wall of the metal fitting to reach the locking edge. The contact edge contacts the lower edge of the central wall of the receiving metal fitting. When the leaf spring for holding the posture is brought into contact with the upper edge of the ear portion which is displaced vertically of the retaining member, the locking claw cannot be removed from the receiving metal fitting. It is said that when the latching claw is pulled out from the metal fitting, the lever of the retaining member may be rotated so as to be vertical, so that the problem of noise is solved. However, in the actual work site, the position dimensions of the locking bracket relative to the receiving bracket are not necessarily as specified, so
The locking metal must be struck into the receiving metal with a hammer, and the problem of noise still remains. Also, since the spring force is acting on the retaining member, there is a retaining effect of the locking claw to some extent, but if a strong force is applied to the bar-shaped horizontal member to lift it from below, the lever of the retaining member in the horizontal state will be vertical. As a result, the locking claw comes out upward. Furthermore, since the locking claw is only loosely fitted into the receiving metal, there is a risk of collapse of the construction structure.

  An object of the present invention is to provide a connection device for a construction structure that solves all of the problems of unexpected connection release, noise generation during connection and release, instability of a bar-like horizontal member with respect to a column, and danger of collapse of the installation structure. To provide.

  The connecting device in the erected structure according to the present invention includes a receiving metal fastened to the outer periphery of a predetermined height of the support structure and an end of a bar-like horizontal member passed between the two support pillars. The receiving bracket is U-shaped when viewed from above and has a vertical opening in the center of the width of the central wall, and the locking bracket is forward of the end plate of the bar-shaped horizontal member. A horizontal protrusion with a rectangular cross section that fits into a vertical groove in the center wall of the bracket, and a locking claw that is provided at the tip of the horizontal protrusion and is inserted between the center wall of the bracket and the column. In the connecting device for a temporary structure provided with arcuate front recesses on both rear surfaces of the central wall across the vertical groove of the receiving metal fitting, and two circles corresponding to both front recesses on the front surface of the end plate An arcuate rear recess is formed, and the horizontal protrusion of the locking bracket A pair of rotating bodies are arranged on the side, and the rotation center axis that spans both rotating bodies is penetrated through the horizontal protrusion, and the receiving metal side of the rotating body has an arc edge and when unlocking A front convex portion formed so as not to interfere with the arc surface of the front concave portion is formed, and a rear convex portion having an arc edge is formed on the end face plate side of the rotating body, and the arc surface and the front convex portion of the front concave portion are formed. Both the arc edges of the part are arcs with a radius centered on the center of the rotation center axis and the front convex part closely fits in the front concave part when locked, and the arc surface of the rear concave part and the arc edge of the rear convex part are both A point separated downward from the center of the rotation center axis is the center of the arc, and the arc is of a radius where the rear protrusion closely fits into the rear recess when locked, and the rotation levers of the pair of rotation bodies It is provided in at least one of the upper and lower sides.

  According to the connecting device in the erected structure of the present invention, the arc-shaped front recesses are formed on the rear surfaces on both sides of the center wall across the vertical groove of the receiving metal fitting, and two front recesses corresponding to the two front recesses are formed on the front surface of the end face plate. An arcuate rear recess is formed, a pair of rotating bodies are arranged on both sides of the horizontal protrusion of the locking bracket, and a rotation center axis that spans both rotating bodies penetrates the horizontal protrusion. A front convex portion is formed on the metal fitting side so as to have an arc edge and not to interfere with the arc surface of the front recess when unlocking, and the end plate of the rotating body has an arc edge. A rear convex portion is formed, and the arc surface of the front concave portion and the arc edge of the front convex portion are both centered on the center of the rotation center axis, and the arc having a radius in which the front convex portion is closely fitted in the front concave portion when locked Both the arc surface of the rear concave part and the arc edge of the rear convex part are below the center of the rotation center axis. The center of the arc is a center of the arc and the radius is such that the rear protrusion closely fits into the rear recess when locked, and the pivot levers of the pair of pivot bodies are provided on at least one of the upper and lower sides of the pivot body. Therefore, when connecting the rod-like horizontal member to the column, the horizontal protrusion was inserted into the vertical groove on the center wall of the metal fitting and the locking claw at the tip was inserted between the metal center wall and the column Then, if the rotating body is rotated counterclockwise until the rotating body stops rotating by the lever for rotation, the arc edge of the rear convex portion and the arc surface of the rear concave portion are brought into a surface pressure contact state, and the rotating body is located behind the end face plate. It is reliably held at the position where the rear convex portion is fitted in the concave portion. Since the front convex portions of the two rotating bodies arranged side by side are fitted into the two front concave portions separated from each other on the central wall of the receiving metal fitting, the central wall of the receiving metal metal is connected to the locking claws of the receiving metal. The rod-like horizontal member is reliably connected to the support column by being sandwiched from the front and rear by the two rotating bodies arranged in a row. In addition, this state is not held by a spring as in the prior art, but is held in a state where the arc edge of the rear convex portion of the rotating body is pressed against and stretched against the arc surface of the rear concave portion of the end plate of the bar-like horizontal member. Therefore, the locking claw cannot be removed from the receiving metal fitting. Therefore, the rod-like horizontal member is reliably connected to the support column in a stable state, and the connection is not unexpectedly released, and of course, there is no risk of collapse of the construction structure. Further, since the rotation of the rotating body in both directions is due to the operation of the lever, it is only necessary to move the lever by hitting it once or twice with a hammer, and no noise is generated as in the case of connection with a conventional wedge. .

  The best mode for carrying out the present invention will be described below with reference to the drawings. In this specification, the clockwise direction and the counterclockwise direction with respect to the rotating direction of the rotating body refer to the directions viewed from the paper side of FIGS. 2 to 4 and FIGS. 8a to 8c. An arc is a shape viewed from the paper side.

  The connecting device in the erection structure shown in FIGS. 1 to 5 is passed between the support metal (2) fixed to the outer periphery of a predetermined height of the strut (1) of the erection structure and the two struts (1). And a locking metal fitting (4) fixed to the end of the bar-like horizontal member (3) to be fixed to the receiving metal fitting (1). The support column (1) and the rod-like horizontal member (3) are made of steel pipes having a predetermined length, and the four metal fittings (2) are peripheral surfaces of the same height of the support column (1) as shown in FIG. It is fixed on all sides by welding. A set of four receiving metal fittings (2) is present in the height direction of the same column (1) at a predetermined interval. Two of the four metal fittings (2) facing each other may be positioned one step below.

  The receiving metal fitting (2) is U-shaped when viewed from the plane, and has an upper opening vertical groove (6) in the center of the width of the central wall (5), and the locking metal fitting (4) is a bar-like horizontal member (3). A horizontal protrusion (8) having a rectangular cross section and extending vertically from the circular end plate (7) and fitted in the vertical groove (6) of the central wall (5) of the metal fitting (2), and the horizontal protrusion (8) The latching claw (9) is provided between the central wall (5) of the receiving metal fitting (2) and the support column (1).

  As shown in FIG. 8c, arcuate front recesses (10) are formed on the rear surfaces of both sides of the central wall (5) sandwiching the vertical groove (6) of the metal fitting (2), and 2 on the front surface of the end plate (7). Two arcuate rear recesses (22) are formed corresponding to the two front recesses (10). A pair of rotating bodies (11) are arranged on both sides of the horizontal protrusion (8) of the locking metal fitting (4), and the rotation center shaft (12) straddling both rotating bodies (11) is connected to the horizontal protrusion (8). It is penetrated through a long slot (13) that is long in the front-rear direction. On the side of the metal fitting (2) of the rotating body (11), the front recess (10) has an arc edge (14a) and does not interfere with the arc surface (10a) of the front recess (10) when unlocked. The front convex part (14) of the shape by which the part corresponding to the lower part of this circular arc surface (10a) was cut off diagonally back downward is formed. When the front concave portion (10) is shallow and does not interfere with the arc surface (10a) of the front concave portion (10) when unlocking, the front convex portion (14) itself having the arc edge (14a) is locked. This means that it does not interfere with the circular arc surface (10a) of the front concave portion (10) at the time of release. A rear projection (15) having an arc edge (15a) is formed on the end plate (7) side of the rotating body (11). The arc surface (10a) of the front recess (10) and the arc edge (14a) of the front projection (14) are both centered on the center (O1) of the rotation center axis (12) and the front recess when locked ( 10), the front convex portion (14) is a circular arc with a tight fit. (R2) is the arc radius of the arc edge (14a) of the front projection (14). The arc surface (22a) of the rear concave portion (22) and the arc edge (15a) of the rear convex portion (15) are both concentric on a vertical line (V) passing through the center (O1) of the rotation center axis (12). A point (O2) that is a predetermined distance (D) below (O1) is the center of the arc, and the arc has a radius that allows the rear protrusion (15) to fit tightly into the rear recess (22) when locked. (R1) is the arc radius of the arc edge (15a) of the rear projection (15). The length of the radius (R1) is such that the point (O2) separated from the center (O1) of the rotation center axis (12) by a predetermined distance (D) and the arcuate rear recess (22) of the end plate (7). Is equal to the horizontal distance between the deepest point (O3). As a result, when the rod-like horizontal member (3) is connected to the column (1), when the rotating body (11) is rotated counterclockwise, the arc edge (15a) of the rear projection (15) becomes the end plate (7). ) Is pressed against the arc surface (22a) of the rear recess (22) and cannot be rotated any further. When the rod-like horizontal member (3) is moved away from the column (1) and the rotating body (11) is rotated clockwise, the arc edge (15a) of the rear convex portion (15) becomes the rear concave portion of the end face plate (7) ( 22) away from the arcuate surface (22a).

  Here, the predetermined distance refers to a practically necessary distance. If the arc center of the arc surface (22a) of the rear concave portion (22) and the arc edge (15a) of the rear convex portion (15) are slightly separated below the center (O1) of the rotation center axis (12), By rotating the rotating body (11) counterclockwise, the arc edge (15a) of the rear projection (15) is pressed against the arc surface (22a) of the rear recess (22) of the end face plate (7). There is no need to choose a distance as large as necessary. In addition, in this embodiment, a point (O2) that is a predetermined distance (D) below the center (O1) of the rotation center axis (12) is perpendicular to the center (O1) of the rotation center axis (12). Although it is on the line (V), it is not necessarily on the vertical line (V), and may be away from the vertical line (V).

  In this embodiment, the arc radius (R1) of the arc edge (15a) of the rear projection (15) is slightly shorter than the arc radius (R2) of the arc edge (14a) of the front projection (14). .

  The upper ends of the pair of rotating bodies (11) are formed in a front and rear step shape in a state where the locking metal fitting (4) is locked and fixed to the receiving metal fitting (2). The upper turning lever (16) is made of an L-shaped plate, and the horizontal portion (16b) is passed to the front horizontal surface of both rotating bodies (11) with the vertical portion (16a) of the L-shaped plate as the support side. It is fixed. The lower rotating lever (17) is formed integrally with each rotating body (11) and extends obliquely downward and rearward. The lower end of the rotating lever (17) is bent backward so that the rear end surface can be easily hit with a hammer. (See FIG. 6).

  Both sides of the upper end of the opening of the vertical groove (6) are tapered upward and outward so that the horizontal protrusion (8) having a rectangular cross section of the locking fitting (4) can be easily fitted into the vertical groove (6). . Also, the lower end of the locking claw (9) faces downward and inward so that it can be easily inserted between the central wall (5) of the catch (2) and the support column (1). Each rear side is tapered downward and forward.

  The horizontal protrusion (8) having a rectangular cross section of the locking metal fitting (4) is fitted into the hole formed in the center of the end face plate (7) so that the rear end of the horizontal rectangular plate matches the cross section of the rectangular projection. It is formed by being fixed to the hole edge rarely. Then, the end of the horizontal protrusion (8) is fixed to the end of the horizontal protrusion (8) by fitting the end of the end into a hole of the stop claw (9) formed so as to match the cross section of the end. (9) is provided.

  On the end face plate (7), a circular cross-sectional cover (18) covering both sides of the pair of rotating bodies (11) and extending to the receiving metal fitting (2) is fixed in a forward projecting manner. Most of the upper side of the cover (18) is a notch (19) so that the upper turning lever (16) can move, and the lower side of the cover (18) is the lower turning lever (17). ) Is a notch (20) so that it can move. On both sides of the cover (18), circular peepholes (21) are formed so that the relationship between the rotation center axis (12) and the long hole (13) can be seen. The diameter of the viewing hole (21) is equal to the length of the long hole (13).

  Next, as shown by the solid line in FIG. 1, a method of connecting the rod-like horizontal member (3) separated from the first support column (1) to the support column (1) will be described. First, as indicated by the chain line in FIG. 1 and the arrow in FIG. 2, the locking claw (9) at the tip of the horizontal protrusion (8) of the locking bracket (4) receives the central wall (5 ) And the column (1). Next, as shown in FIG. 3, the catching claw (9) is inserted between the central wall (5) of the receiving metal fitting (2) and the column (1). At this time, the vertical portion (16a) of the upper turning lever (16) made of an L-shaped plate is inclined obliquely downward to the rear. Then, the rotating body (11) in the state shown in FIG. 3 rotates counterclockwise, and becomes in the state shown in FIG. 4 and cannot be rotated any further.

The reason will be described with reference to FIGS. 8a to 8c. FIG. 8a shows a state in which the lower end of the arc edge (14a) of the front convex part (14) of the rotating body (11) is about to enter the front concave part (10) of the central wall (5) of the receiving metal fitting (2). In this state, on a vertical line (V) passing through the rotation center axis (12), a horizontal line passing through a point (O2) that is a predetermined distance (D) below the center (O1) of the rotation center axis (12) ( H) A gap (S1) is generated between the arc edge (15a) on the upper surface and the deepest point (O3) of the rear recess (22) of the end face plate (7). In FIG. 8b, the rotating body (11) further rotates counterclockwise, and the lower end of the arc edge (14a) of the front convex part (14) of the rotating body (11) is the front concave part (10) of the central wall (5). ) In the middle of the length of the circular arc surface (10a). In this state, on the vertical line (V) passing through the center (O1) of the rotation center axis (12), the horizontal line (H) passing through the point (O2) that is a predetermined distance (D) below the center (O1). A gap (S2) is generated between the upper arc edge (15a) and the deepest point (O3) of the rear recess (22) of the end face plate (7). This gap (S2) is smaller than the previous gap (S1). In FIG. 8c, the rotating body (11) further rotates counterclockwise, and the lower end of the arc edge (14a) of the front convex part (14) of the rotating body (11) is the front concave part (10) of the central wall (5). ) Shows a state of coming near the lower end of the length of the circular arc surface (10a). In this state, on the vertical line (V) passing through the center (O1) of the rotation center axis (12), the horizontal line (H) passing through the point (O2) that is a predetermined distance (D) below the center (O1). The gap between the upper arc edge (15a) and the deepest point (O3) of the rear recess (22) of the end face plate (7) is zero. This is because the length of the line connecting the arc edge of the arc edge (15a) and the arc edge (15a) of the rear projection (15), that is, the length of the radius (R1) is the center of the rotation center axis (12) ( This is because it is equal to the horizontal distance between the point (O2) that is a predetermined distance (D) below O1) and the deepest point (O3) of the rear recess (22) of the end face plate (7). At this point, the arc edge (15a) of the rear convex portion (15) and the arc surface (22a) of the rear concave portion (22) are in a pressure contact state, and the rotating body (11) can no longer rotate. When the rotating body (11) is rotated in the counterclockwise direction as shown in FIGS. 8a to 8c, the rear projection (15) of the rotating body (11) is in the above state. On the vertical line (V) passing through the center (O1) of the rotation center axis (12), the radius (R1) with the point (O2) separated by a predetermined distance (D) below the center (O1) as the arc center This is because although the arc edge (15a) is provided, the arc edge (15a) rotates about the center (O1) of the rotation center axis (12). In order to release the connection of the rod-like horizontal member (3) to the support column (1), the lower end of the lower rotating lever (17) extending diagonally downward and rearward of the rotating body (11) is moved forward with a hammer. When hit, the rotating body (11) rotates clockwise, and the front protrusion (14) of the rotating body (11) follows the reverse of the above and the front wall (5) of the metal fitting (2) is in front. The locking claw (9) can be removed from between the central wall (5) of the metal fitting (2) and the support column (1) through the recess (10).

  The lower turning lever (17) may be omitted and the vertical portion (16a) of the upper turning lever (16) made of an L-shaped plate may be pulled rearward. Since it is close to 1), it becomes difficult to work.

  For some reason, when the arc edge (15a) of the rear projection (15) contacts the arc surface (22a) of the end plate (7) and the rear recess (22), the front projection (14) of the rotating body (11). In this embodiment, even if there is a gap between the arc edge (14a) and the arc surface (10a) of the front recess (10) of the central wall (5), the rotation center axis (12) is passed. Since this is a long hole (13) which is long in the front-rear direction, this gap can be filled. That is, the rotating body (11) is further rotated counterclockwise with the arc edge (15a) of the rear projection (15) in contact with the arc surface (22a) of the rear recess (22) of the end face plate (7). Then, as is clear from FIG. 8c, the distance from the center (O1) of the rotation center axis (12) to the arc edge (15a) gradually increases from the top to the bottom, so that the end plate (7) The contact point of the arc edge (15a) of the rear projection (15) at the deepest point (O3) of the rear recess (22) moves below the arc edge (15a), and the center of rotation corresponds to the movement. The shaft (12) moves in the forward direction of the long hole (13) to fill the gap, and the rotation stops when the rotating body (11) becomes a stretched shape.

It is a horizontal sectional view showing a state just before connecting a bar-like horizontal member to a pillar. It is the side view which notched a part which shows the state just before connecting a rod-shaped horizontal member to a support | pillar. It is the side view which notched a part which shows the state in the middle of the rotation of a rotating body. It is the side view which notched a part which shows the state which connected the rod-shaped horizontal member to the support | pillar. FIG. 5 is a sectional view taken along line VV in FIG. 4. It is a side view of the rotation body provided with the lever for up-down rotation. It is a rear view of the rotation body provided with the lever for up-down rotation. The relationship between the front convex portion having the arc edge when rotating the rotating body and the arc-shaped front concave portion of the central wall and the relationship between the rear convex portion having the arc edge and the arc-shaped rear concave portion of the end face plate, It is an explanatory side view in the state where the lower end of the arc edge of a front convex part is going to enter the circular arc front concave part. FIG. 4 is a side view illustrating the above relationship in a state where the lower end of the arc edge of the front convex portion has reached the middle of the length of the arc surface of the front concave portion. The lower end of the arc edge of the front convex part comes closer to the lower end of the length of the arc surface of the front concave part, and the arc edge of the rear convex part and the arc surface of the rear concave part of the end face plate are in pressure contact with each other. It is explanatory side view in a state.

Explanation of symbols

(1) Support (2) Receiving bracket (3) Bar-shaped horizontal member (4) Locking bracket (5) Center wall of the receiving bracket (6) Vertical opening vertical groove in the center wall (7) End plate of the bar-shaped horizontal member (8) ) Horizontal protrusion (9) Locking claw (10) Front recess (10a) Arc surface of the front recess (11) Rotating body (12) Center of rotation (O1) Center of center of rotation (14) Front projection (14a) Arc edge of the front convex part (15) Rear convex part (15a) Arc edge of the rear convex part (O2) Point away from the center of the rotation center axis (R2) Arc of the arc edge of the front convex part Radius (R1) Arc radius of arc edge of rear projection (16) Upper turning lever (17) Lower turning lever
(22) Rear recess on end plate
(22a) Arc surface of rear recess of end plate

Claims (1)

  It consists of a receiving bracket fixed to the outer periphery of a predetermined height of the support structure pillar, and a locking bracket fixed to the end of the bar-shaped horizontal member passed between the two supports and locked to the receiving bracket, The bracket is U-shaped when viewed from the plane, and has an upper opening vertical groove in the center of the width of the central wall, and the locking bracket extends forward from the end face plate of the bar-shaped horizontal member to the vertical groove of the central wall of the bracket. In a connecting device for a temporary structure, comprising: a horizontal projecting portion having a vertical rectangular cross-section to be fitted into the housing; and a locking claw that is provided at the front end of the horizontal projecting portion and is inserted between the central wall of the receiving bracket and the column An arcuate front recess is formed on the rear surfaces of both sides of the central wall across the vertical groove of the metal fitting, and two arcuate rear recesses are formed on the front surface of the end face plate corresponding to the two front recesses. A pair of rotating bodies are arranged on both sides of the horizontal protrusion of the The pivoting central shaft that penetrates the horizontal protrusion, and has a circular arc edge on the receiving metal side of the pivoting body, so that it does not interfere with the arc surface of the front recess when unlocked. A convex portion is formed, and a rear convex portion having an arc edge is formed on the end face plate side of the rotating body, and the arc surface of the front concave portion and the arc edge of the front convex portion are both centered on the center of the rotation center axis. The center of the arc is a radius of arc where the front convex part closely fits in the front concave part when locked, and the arc surface of the rear concave part and the arc edge of the rear convex part are both separated downward from the center of the rotation center axis. The center of the arc is a circular arc having a radius in which the rear convex portion is closely fitted to the rear concave portion at the time of locking, and the pivot levers of the pair of pivot bodies are provided on at least one of the upper and lower sides of the pivot body. A connecting device in an erected structure.

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