JP4220561B2 - Tightening device for wedge-tight scaffolding - Google Patents

Description

  The present invention relates to a binding device in a wedge binding type scaffold.

  In this specification, in the relationship between the support column and the arm wood, the front side refers to the side with the support column to be tightened, and the rear side refers to the side with the arm wood to be tightened.

  The above-mentioned conventional fastening device is composed of a receiving bracket fixed to the outer periphery of a predetermined height of a support column and a wedge-shaped locking bracket fixed to an end of an arm lumber passed between the two support columns. The struts and arm lumbers were tightly bound by hitting the retaining brackets with a hammer from above and locking them. In addition, when releasing the tightness between the support column and the arm lumber, either release the lock by hitting the wedge lock bracket of the arm lumber from below with the hammer of the support column or near the support bracket of the prop. The end of the arm wood was struck from below with a hammer to release the lock of the wedge-shaped lock fitting fixed to the end. In this way, the support column and arm timber are simply tightened by receiving the wedge-shaped locking bracket and inserting it firmly into the bracket. During installation, if an unexpected force is applied to the arm wood from below, such as when a tool or material hits the arm wood, the wedge-shaped locking bracket will loosen, and the wedge-shaped locking will start from the receiving bracket. There was a risk that the bracket would come off. Furthermore, when a sheet steel floor cloth used in a frame scaffold that has been widely used in the past is attached to the arm wood, the floor cloth has a lock function for the arm wood. Therefore, when wind pressure is applied from below, there is a risk that the wedge-shaped metal fittings of the arm wood will come off the receiving metal and the cloth with the floor will fall together with the arm wood. Therefore, an expanded metal fabric that blows through the wind is used as a cloth with a floor. Since the expanded metal is narrower than the thin steel plate, if it is made of cloth with a floor having the same width as that of the thin steel plate, it becomes heavy and expensive. Therefore, although the width of the cloth with the floor is narrowed, if the width is narrow, anxiety is given to those who work on it. In addition, since the bottom made of expanded metal can be seen through, there is a problem that the work floor and the passage give further anxiety.

In the connecting device between the support and the horizontal member constituting the temporary structure, the following device has been proposed in which the locking as disclosed in Patent Document 1 is not unexpectedly released. That is, in this proposed apparatus, the receiving 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 plate of the horizontal member, and the receiving bracket. A horizontal projection having a rectangular cross section that fits in a vertical groove in the central wall of the central wall, a locking claw that is provided at the tip of the horizontal projection and is inserted between the central wall of the receiving bracket and the support column, In the rear, it is hooked slidably back and forth on the horizontal protrusion by a downward opening vertical groove formed in the center and has a forward horizontal convex part at the lower end, in the form of a vertical rectangle seen from the front, reversed from the side, A spring-made central wall clamping member that clamps the central wall with the front locking claw, and a hook that is vertically movable between the clamping member and the end plate so that it can be moved up and down. When viewed from the top, the upper half is wide and the lower half is narrow. Only those that and a wedge member which locking pin is passed.
JP 2003-56176 A JP 2006-45822 A

  According to the proposed device disclosed in Patent Document 1, after inserting the locking claw of the locking metal fitting between the central wall of the metal fitting and the column, the upper end of the wedge member at the raised position is hit with a hammer several times. The upper half-width part is lowered and the spring-shaped central wall clamping member made of springs is advanced against the spring force, the central wall is narrowed by the locking claw, and the column and the horizontal member are connected. Therefore, the spring force of the central wall clamping member is working at the time of connection, and the wedge member does not easily fall upward. 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. Accordingly, the horizontal member is slight but unstable with respect to the column.

  It is an object of the present invention to provide a binding device in a wedge-type scaffold that solves both the unexpected release of arm wood from the support and the instability of the arm wood with respect to the support.

  The binding device for the wedge-binding scaffold according to the invention of claim 1 is embedded so that the front side is exposed at the end of the arm lumber passed between the support metal and the two support columns fixed to the outer periphery of the predetermined height of the support column. It consists of a locking bracket that is installed and locked to the receiving bracket. The receiving bracket is U-shaped with the center wall tilted forward and downward, and the locking bracket is lowered for tightening. Finally, a longitudinal plate-shaped wedge having a front edge with a vertical part in contact with the column and a rear edge inclined forward and downward at substantially the same inclination as the central wall of the bracket, and a part protrudes downward from the arm wood and A wedge guide member in which the central wall is tilted forward and downward at the same inclination as the central wall of the metal fitting, and the wedge is movably moved up and down, with a U shape that fits into the metal fitting when viewed from the plane, Between the wedge and the central wall of the wedge guide member The upper end is attached to the upper part of the wedge guide member so as to be able to swing back and forth, and the lower end part is provided with a retaining protrusion protruding rearward and is urged toward the wedge side by a push spring. The wedge escapement prevention bar is passed between both side walls of the wedge guide member, and the wedge escape prevention bar can only move across the vertical length required for vertical movement of the wedge. A vertically long hole with a trailing edge that contacts or a forward notch is formed in the wedge, and the lower part from the arm lumber of the wedge guide member is an insertion part to the receiving metal fitting, and the insertion part portion in the central wall of the wedge guide member is In the state where the front and rear penetrating retaining projection storage portion is formed, the insertion portion of the wedge guide member is inserted into the receiving bracket, and the end of the arm lumber is received at the upper end of the receiving bracket, the central wall of the receiving bracket A retaining projection receiving portion is formed corresponding to the retaining projection receiving hole, and the retaining projection receiving portion has an upper edge on which the retaining projection is caught when the locking bracket attempts to be pulled upward from the receiving bracket. The swing bar swings backward against the spring force when tightening and receives the retaining protrusion into the retaining protrusion receiving part of the bracket, and swings forward and retracts due to the spring force when tightening is released. The distance between the central wall of the wedge guide member and the wedge is determined so as to be pulled out from the retaining projection receiving portion of the metal fitting.

  According to a second aspect of the present invention, in the binding device in the wedge-tightening type scaffold according to the first aspect, the arm lumber is made of a metal tube, and the corresponding portion of the wedge guide member is closely fitted to the upper and lower peripheral wall facing portions of the end portion of the metal tube. A U-shaped notch is provided when viewed from the plane, and the wedge guide member is fitted into the upper and lower notches so that its upper edge slightly protrudes from the upper end of the pipe, and is welded to the arm. The upper end of the swing bar fixed to the both side walls does not exceed the upper edge of the wedge guide member, and the wedge inserted into the wedge guide member is Among them, at least a portion of the cloth scaffolding with the thin steel plate floor for the frame scaffolding is formed in a shape that is substantially the same height as the upper edge of the wedge guide member.

  According to a third aspect of the present invention, in the binding device for the wedge-tightening type scaffolding according to the first or second aspect, the push spring is a coil spring, and the coil spring is formed in a rearward bottomed hole opened near the lower end of the swing bar. The rear projecting end is fitted into the rear projecting state, and the rear projecting end is received by the front surface of the central wall of the wedge guide member.

  According to the invention of claim 1, the end of the arm lumber is directly received by the upper end of the metal fitting, and the arm lumber does not wobble due to the wedge action, so that the arm lumber is kept firmly and level, Even if a sheet steel floor cloth is used and wind pressure is applied from below, the retaining projection on the retaining bracket side will catch on the upper edge of the retaining projection receiving portion of the retaining bracket. There is no risk that the will come out of the bracket. Therefore, there is an advantage that a cloth with a floor made of a thin steel plate can be used instead of the expanded metal.

  In the conventional wedge-binding scaffold, a cloth cloth with a floor having a width that does not hit the wedge-shaped fittings at both ends of the arm lumber is used. In the case of a framed scaffold, the cloth bracket with a floor grips the horizontal frame of the vertical frame, so there is no obstacle at the end of the horizontal frame, and the floor is wider than the cloth with the wedge-tight scaffolding floor. A cloth with a cloth is used. If you want to use a cloth with a wide floor for a conventional wedge-tight scaffold, make sure that the width between the grips on both ends of the floor cloth is avoided from the wedge-shaped locking brackets on both ends of the arm lumber. There is an inconvenience to make a special product that is narrow.

  According to the invention of claim 2, the arm wood is made of a metal tube, and a U-shaped notch portion is provided as viewed from the plane in which the corresponding portion of the wedge guide member is closely fitted to the upper and lower peripheral wall facing portions of the end portion of the metal tube, The wedge guide member is fitted in the upper and lower cutouts so that its upper edge slightly protrudes from the upper end of the pipe and welded to the arm, and the upper end of the swing bar that is fixed to both side walls of the wedge guide member The wedge is inserted into the wedge guide member so that the wedge does not exceed the upper edge of the wedge guide member. Since the part where the metal fittings are hooked is formed in a shape that is almost the same height as the upper edge of the wedge guide member, the cloth with a thin steel sheet floor for the frame scaffolding with a width that can be relieved by the worker working above Can be used and wife with it Morning glory of use, curing frame, member, which has been used in the framework scaffolding, such as sheet also has the advantage that it is made available.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  The binding device in the wedge-binding scaffold shown in FIG. 1 to FIG. 7 is a brace (2) fixed to the outer periphery of a predetermined height of the support column (1) and the arm wood passed between the two support columns (1). It consists of a locking fitting (4) that is embedded in the end of (3) so that the front side is exposed and locked to the receiving fitting (2). The support column (1) and the arm wood (3) are made of steel pipes having a predetermined length, and four steel support brackets (2) are arranged at the same height of the support column (1) as shown in FIG. It is fixed to the four sides by welding. Two of the four metal fittings (2) facing each other may be positioned one step below.

  The metal fitting (2) is U-shaped when viewed from the plane, and the central wall (5) is inclined forward and downward. The locking metal fitting (4) has a vertical part (6) in contact with the support column (1) when being lowered for tightening, and the lower part is inclined slightly downward so that it can be easily inserted into the receiving metal fitting (2). A steel vertical wedge (8) having a front edge and a rear edge (7) inclined forward and downward at substantially the same inclination as the central wall (5) of the catch (2); 3) Projected downward from the plane and sized to fit into the bracket (2) when viewed from above, the central wall (9) is tilted forward and downward at the same inclination as the central wall (5) of the bracket (2). And a wedge guide member (10) in which the wedge (8) is inserted so as to be movable up and down, and an upper end interposed between the wedge (8) and the central wall (9) of the wedge guide member (10). The part is attached to both side walls (11) of the wedge guide member (10) by a stop shaft (12) so that it can swing back and forth. The lower end is provided with a retaining protrusion (13) that protrudes backward in a bent shape, and a swing bar (15) that is biased toward the wedge (2) by a coil spring (14). . The coil spring (14) is fitted in a rearward projecting state in a rearward bottomed hole (16) opened near the lower end of the swing bar (15), and the rearward projecting end is the central wall of the wedge guide member (10). Received on the front of (9). The wedge (8) has a length that can protrude partly above the wedge guide member (10) when the binding is released, and partly protrude below the wedge guide member (10) when tightened. The wedge escape prevention bar (17) is blocked from the coil spring (14) at a position approximately in the middle of the width of both side walls (11) of the coil spring (14). A longitudinal hole (19) having a rear edge (18) with which the wedge escape prevention bar (17) is in contact with the longitudinal length necessary for vertical movement is formed in the wedge (8). The vertically long hole (19) is inclined forward and downward at the same inclination as the central wall (9) of the wedge guide member (10). Instead of the vertically long hole (19), a forward notch having a rear edge similar to this may be used. The rear edge (7) inclined forward and downward with substantially the same inclination as the central wall (5) of the catch (2) is easily inserted into the wedge guide member (10) on the front side of the swing bar (15). The substantially lower half is slightly inclined from the upper part.

  The lower part from the arm wood (3) of the wedge guide member (10) is an insertion part (20) to the receiving metal fitting (2), and the insertion part part in the central wall (9) of the wedge guide member (10) An inverted U-shaped retaining projection storage downward cutout (21) penetrating into the recess is formed, and the insertion portion (20) of the wedge guide member (10) is inserted into the receiving bracket (2), and the receiving bracket (2) In a state where the end of the arm lumber (3) is received at the upper end, the reverse U-shaped retaining projection corresponding to the retaining projection storage downward notch (21) on the central wall (5) of the receiving bracket (2) A receiving downward notch (22) is formed. The retaining protrusion receiving downward notch (22) has an upper edge on which the retaining protrusion (13) is hooked when the locking metal fitting (4) tries to come out upward from the receiving metal fitting (2). The swing bar (15) swings backward against the spring force when tightened, and the retaining protrusion (13) is pushed into the retaining protrusion receiving notch (22) of the metal fitting (2) to release the tightening. The center wall (9) of the wedge guide member (10) is pivoted forward by the spring force so as to be pulled out from the retaining projection receiving downward notch (22) of the metal fitting (2) by receiving the retaining projection (13). The distance from the wedge (8) is determined. A through-hole may be used instead of the retaining protrusion receiving downward notch (21), and a forward recess may be used instead of the retaining protrusion receiving downward notch (22).

The wedge guide member (10) is provided so as to extend downward from the end of the arm wood (3) as follows. The arm wood (3) is made of steel pipe. Therefore, a U-shaped notch (23) (41 ) is provided in the plane where the corresponding portion of the wedge guide member (10) fits closely at the upper and lower peripheral wall facing portions of the end portion of the metal tube, and the wedge guide member (10 ) is provided. The upper edge is fitted into the upper and lower cutouts (23) and (41 ) so as to slightly protrude from the upper surface of the pipe, and the arm wood (3 ). In particular, at the outer side of both side edges of the U-shaped lower notch (41), the bead (26) fits into the shallow recess (25) formed over almost the entire upper end of the side walls (24) of the receiving metal fitting (2). The wedge guide member (10) is welded to the arm wood (3) at the portion corresponding to the depression (25). The upper end portion of the swing bar (15) fixed to the both side walls (11) of the wedge guide member (10) does not exceed the upper edge of the wedge guide member (10). The wedge (8) inserted into the wedge guide member (10) has a slight portion of the entire upper edge (27) of the wedge guide member (10) where the gripping bracket of the cloth frame with the thin steel sheet floor for the frame frame scaffolding is fastened. The upper end of the wedge guide member (10) is formed so as not to be inclined upwardly by being inclined downward, and the front side of the wedge guide member (10) is an upper protrusion (28) for hammering (see FIG. 5).

  FIG. 8 to FIG. 10 show modifications of the attaching portion of the swing bar to the wedge guide member and the upper edge portion of the wedge.

  The swing bar (31) shown in the figure is provided with a latching protrusion (32) protruding rearward in a bent shape at the upper end portion, and from the upper end portion of the central wall (34) of the wedge guide member (33). An upward notch (36) is formed on the rear upper end of both side walls (35), and a latching protrusion (32) of the swing bar (31) is fitted into the upward notch (36) to form a central wall. (34) It is hooked on the upper edge so as to be swingable back and forth. In this embodiment, since the wedge-shaped guide member (33) is formed with an upward notch (36), the depth of the U-shaped upper notch (42) is the same as that of the U-shaped lower notch (23). It becomes shorter than the depth.

  The wedge (37) inserted into the wedge guide member (33) shown in the figure is the part of the upper edge (38) of the entire upper edge (38) at the time of tightening where the gripping bracket of the cloth with the steel sheet floor for the frame scaffolding is fastened. Is formed in a shape slightly beyond the upper edge of the wedge guide member (33), the front side thereof is an upper protrusion (39) for hammering, and the rear convex arc-shaped portion (40 ) Is formed (see FIG. 9).

  8 to 10, the same reference numerals are given to the same or similar parts that are not substantially different from this embodiment even if they are slightly different in size or shape from the embodiment shown in FIGS. 1 to 7. Description is omitted.

  In the above description, in order to fasten the arm lumber (3) to the strut (l), the latch metal (4) of the arm lumber (3) is first latched to the catch (2) of the strut (1). Put the fastener (4) into the receptacle (2). Then, the insertion portion (20) of the wedge guide member (10) (33) fits into the receiving metal fitting (2) and the end of the arm lumber (3) itself is received by the upper edge of the receiving metal fitting (2). The timber (3) does not tilt and its levelness is guaranteed. In this state, the wedges (8) and (37) escape from the wedge in contact with the swinging bars (15) and (31) swinging forward by the spring force and the rear edge (18) of the vertically long hole (19). Since the upper part of the wedge guide member (10) (33) protrudes from the wedge guide member (10) (33), the wedge (8) (37) is hit from above with a hammer. Lower. Then, since the vertical part of the front edge (6) of the wedges (8) and (37) is in contact with the support (1), the support (1) on the horizontal line passing through the coil spring (14) and the swing bar (15 ) The interval of (31) gradually widens as the wedges (8) and (37) are lowered. In other words, the rocking bar (15) (31) is swung backward, and the wedge guide members (10) and (33) are tightened. The retaining protrusion receiving notch (22) of the metal fitting (2) against the spring force against the retaining protrusion (13) of the retaining protrusion housing downward notch (21) of the central wall (9) (34) ). As a result of the above, by the wedge action, the arm lumber (3) is kept firmly and tightly connected to the support post (1) in a stable state. Moreover, when a thin steel plate floor cloth with a gripping metal not shown is attached to a pair of separated arm timbers (3), even if a strong wind pressure is applied from below, the locking metal (4 ) -Side retaining protrusion (13) is caught on the upper edge of the retaining protrusion receiving notch (22) of the receiving metal fitting (2), and there is a risk that the locking metal fitting (4) may come off from the receiving metal fitting (2). Absent.

  To remove the locking bracket (4) of the arm lumber (3) from the bracket (2) of the support column (1), the lower end of the wedge (8) (37) protruding downward from the bracket (2) is used. When the hammer is struck up, the wedge action is released as the wedge (8) (37) rises, and the distance between the support (1) and the swing bar (15) (31) on the horizontal line passing through the push spring (14). Is narrowed as the wedges (8) and (37) are lifted. As a result, the swinging bars (15) and (31) are swung forward by the spring force, and the retaining protrusions (13) are mounted on the catches (2). It is pulled out of the retaining projection receiving downward notch (22) and returned to the retaining projection housing downward notch (21) of the central walls (9) and (34) of the wedge guide members (10) and (33). Then, since the wedge guide members (10) and (33) are free with respect to the metal fitting (2), when the arm lumber (3) is lifted, the locking metal fitting (4) can be removed from the metal fitting (2). The arm wood (3) can be released from the support (1).

  In this way, it is possible to eliminate both unexpected release of the arm wood (3) from the support post (1) and instability of the arm wood (3) with respect to the support post (1).

1 shows an example of an embodiment of the present invention and is a horizontal cross-sectional view showing a state immediately before an arm lumber is fastened to a column. FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1. It is a side view which shows the state just before tying an arm lumber to a support | pillar. FIG. 6 is a side view in which a part of the locking metal fitting is put in the receiving metal fitting, and a part showing a state in which the end portion of the arm lumber is received by the upper end of the receiving metal fitting is cut out. It is the side view which notched a part which shows the state which lowered the wedge from the state of FIG. FIG. 6 is an enlarged sectional view taken along line VI-VI in FIG. 5. It is a disassembled perspective view of the rocking | fluctuation bar and pushing spring of FIG. FIG. 10 is a side view showing another example of the embodiment of the present invention, in which a locking metal fitting is received in a metal fitting, and a part of the arm lumber is cut out to show a state where the end portion of the arm lumber is received on the upper end of the metal fitting. . It is the side view which notched a part which shows the state which lowered the wedge from the state of FIG. FIG. 9 is an exploded perspective view of the swing bar and the push spring of FIG. 8.

Explanation of symbols

(1) Support (2) Receiving bracket (3) Arm lumber (4) Locking bracket (5) Center wall of the receiving bracket
(6) Wedge front edge
(7) Trailing edge of the wedge
(8) (37) Wedge
(9) (34) Central wall of wedge guide member
(10) (33) Wedge guide member
(11) (35) Both side walls of wedge guide member
(13) Retaining protrusion
(14) Coil spring (pressing spring)
(15) (31) Oscillating bar (17) Escape prevention bar (18) Rear edge of the vertical hole (19) Vertical hole (20) Insertion part of the wedge guide member into the receiving bracket (21) Downward notch housing (Retaining protrusion storage part)
(22) Retaining protrusion receiving downward notch (Retaining protrusion receiving part)
(23) (42) U-shaped upper notch (41) U-shaped lower notch (27) (38) Upper edge of the wedge

Claims (3)

  A receiving bracket fixed to the outer periphery of the pillar at a predetermined height, and a locking bracket embedded in the end of the arm lumber passed between the two supports so that the front side is exposed and locked to the receiving bracket; The bracket is U-shaped with the center wall inclined forward and the locking bracket is a front edge with a vertical part that comes into contact with the column when it is lowered for tightening and the bracket. A vertical plate-shaped wedge with a trailing edge that slopes forward and downward at approximately the same inclination as the central wall, and a central wall that is partially U-shaped and protrudes downward from the arm lumber and fits into the receiving bracket as seen from the plane Is tilted forward and downward at the same inclination as the central wall of the bracket, and is interposed between the wedge guide member in which the wedge is inserted in a vertically movable manner and the central wall of the wedge and the wedge guide member. The upper end is swingable back and forth on the top of the wedge guide member And a rocking bar that is biased toward the wedge side by a push spring and is provided on both side walls of the wedge guide member. The bar is blocked, and the wedge escape prevention bar has a vertical length that is necessary for vertical movement of the wedge, and the wedge is formed with a longitudinal hole or a forward notch with a trailing edge that contacts the wedge escape prevention bar when released. The lower part from the arm lumber of the wedge guide member is an insertion part to the receiving metal fitting, and the insertion guide part in the central wall of the wedge guide member is formed with a front-rear penetrating retaining protrusion storage part to insert the wedge guide member When the end is inserted into the bracket and the end of the arm lumber is received at the upper end of the bracket, a retaining protrusion receiving portion is formed on the central wall of the receiving bracket corresponding to the retaining protrusion storage portion. The retaining protrusion receiving portion has an upper edge on which the retaining protrusion is caught when the locking bracket is about to be pulled upward from the receiving bracket, and the swing bar resists the spring force when tightening. Swing backward to receive the retaining protrusion and push it into the retaining protrusion receiving part of the metal fitting, and swing it forward by the spring force when releasing the tightening to receive the retaining protrusion and pull it out from the retaining protrusion receiving part of the metal fitting. A binding device in a wedge-tightening type scaffold in which a distance between a central wall of a wedge guide member and a wedge is determined.   The arm timber is made of metal pipe, and a U-shaped cutout is provided on the upper and lower peripheral wall facing part of the end of the metal pipe as viewed from the plane where the corresponding part of the wedge guide member fits tightly. The upper part of the swing bar that is fitted to the upper and lower cutouts and is welded to the arm so as to slightly protrude from the upper surface of the wedge guide member The wedge inserted into the wedge guide member is not wedged upward, and at least the portion of the entire upper edge of the wedge that is attached to the cloth scaffolding with the thin steel plate floor for the frame scaffolding is wedge-guided when tightened. The binding device for a wedge-tightening type scaffold according to claim 1, wherein the binding device is formed in a shape that is substantially the same height as the upper edge of the member.   The push spring is a coil spring, and this coil spring is fitted in a rearwardly projecting bottom hole formed near the lower end of the swing bar in a rearward projecting state, and the rearward projecting end is received by the front surface of the central wall of the wedge guide member. The binding device in the wedge binding type scaffold according to claim 1 or 2.

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