JP2018204306A - Ladder fixture - Google Patents

Abstract

To provide a ladder fixture capable of vertically connecting and fixing ladders to each other safely and easily.SOLUTION: A ladder fixture 1 vertically connects and fixes ladders 11a and 11b having a plurality of rungs provided in parallel between supports, to each other. The fixture comprises a pair of clamping parts 2a and 2b which clamp supports 12a and 12b of the top and bottom ladders 11a and 11b to be connected from a thickness direction of the ladders 11a and 11b, and a connection part for connecting the pair, and is formed so as to have a U-shaped cross-section. A rung fit-in groove 4 for fitting in rungs 13a and 13b from the thickness direction of the ladders 11a and 11b is provided in one clamping part 2b. A fastener 5 for preventing the rung from falling out is provided between tips of the clamping parts 2a and 2b.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a ladder fixing bracket for connecting up and down ladders mainly used in scaffolding work and the like.

  Conventionally, when a temporary scaffold is assembled at a construction site and a ladder for raising and lowering is attached between the upper and lower scaffolds, the ladder is sometimes connected and fixed up and down. In addition, in a work stage for building a steel frame or a suspended scaffold, the distance between the scaffolds may be about 6 m, and a plurality of ladders may have to be connected and fixed.

  For example, there are Patent Documents 1 to 3 related to a connecting tool for connecting a ladder and a tool for connecting a scaffold and a ladder.

  Patent Document 1 describes an extendable ladder and its connecting tool. The connector is locked / released to a frame having a portion fixed to one of the two stacked side columns and facing the other side column, and a locked portion formed on the other side column. An engaging portion, a wedge member slidably fitted between the other side column and the frame, and sliding the wedge member to press the other side column to one side column. An operation unit for temporarily fixing the frame and the side column is provided.

  Patent Document 2 describes a method for fixing a temporary ladder in which both ends of a horizontal pipe member for a step are opened on the outer surfaces of left and right vertical members. Use a fixing bracket that consists of an insertion flange that can be inserted into the horizontal pipe material for the step and a support flange that is connected to the outer end of the insertion flange, and the insertion flange of the fixing bracket is located at the appropriate height of the ladder. In a state where it is inserted into the pipe material, the support hook portion of the fixing bracket and the structure located around the ladder or the connecting member fixed to the structure are connected by a clamp.

  Patent Document 3 describes a lifting bracket fixing bracket that is attached to a temporary scaffold formed by assembling a plurality of vertical members, cross members, scaffolding plates, and the like. A pair of substantially U-shaped holding pieces for holding the ladder pillars are provided in parallel, and the base ends of each holding piece are connected by a flat guide member to form a fixing metal body. The guide member is provided with slits of a predetermined length substantially parallel to the respective holding pieces, and the slits are slidable by inserting support bolts of locking clamp bases that lock the cross members of the temporary scaffolding into the slits. When the ladder is fixed to the temporary scaffold, the ladder is fixed to the horizontal member of the temporary scaffold with the locking clamp while holding the ladder pedestal with the holding piece, and the fixing bracket body is aligned with the slit. The ladder pedestal is clamped between the holding piece and the horizontal member of the temporary scaffold to be fixed.

Utility Model Registration No. 3127879 JP 2004-108064 A JP 2012-158944 A

  The method described in Patent Document 1 is provided in the connection portion when the side pillars of the upper and lower ladder bodies are overlapped to be extended and retracted, and the side pillars are slid so that the length of the ladder is a desired length. By inserting the wedge member, the upper and lower side pillars can be temporarily fixed, but this is not suitable when the number of ladders is large, and lacks stability.

The method described in Patent Document 2 is an L-shaped fixing bracket, which is composed of an insertion hook part made of a pipe material and a support hook part made of a pipe material fixed to one end of the insertion hook part at a right angle. However, it can be used only for ladders in which both ends of the horizontal pipe material for the step are open on the outer surfaces of the left and right vertical members.
The method described in Patent Document 3 connects a temporary scaffold and a ladder, and cannot connect the ladders.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a ladder fixing bracket that can connect and fix ladders up and down safely and easily.

  The ladder fixing bracket according to the present invention is a ladder fixing bracket for vertically connecting and fixing ladders in which a plurality of step bars are provided in parallel between two columns, and the columns are sandwiched from both sides in the width direction of the ladder. A step rail insertion groove that is formed in a U-shaped cross section from a pair of sandwiching portions and a connection portion connecting the pair of sandwiching portions, and in which at least one of the pair of sandwiching portions fits a step rail from the thickness direction of the ladder Is provided, and a fastener is provided between the distal ends of the pair of sandwiching portions to prevent the step rail from coming out.

  Place the ladder struts on the ladder with a pair of clamping parts so that the ladder treads connected to the top and bottom are placed side by side and the two treads on the top and bottom ladders that are lined up side by side are inserted into the treadle insertion slots. Insert from the width direction. A fastener can be provided between the front ends of the pair of sandwiching portions, and the ladder fixing bracket can be fixed to the ladder support so that the step bar does not come out of the ladder fixing bracket.

  Although the fastening method and form of the fastener are not particularly limited, for example, an openable / closable fastener that is pivotally supported by one of the tip portions of the pair of sandwiching portions and locked and fixed to the other can be used. Note that the fastener may be integrated with the ladder fixing bracket in advance, or may be a separate fastener from the ladder fixing bracket.

It is preferable that a rib-like folded portion for sandwiching the step rail from above and below is formed above and below the step rail insertion groove.
By providing the rib-like turn-up portions above and below the treadle insertion groove, the rigidity of the ladder fixing bracket itself is increased. In addition, there is also an effect of preventing and stabilizing the ladder when the ladder is raised and lowered by inserting the ladder with the stepped-piece insertion groove.

  A clamp fitting can be provided integrally or detachably on the back side of the connecting portion of the ladder fixing fitting. By providing the clamp fitting on the back side of the connecting portion of the ladder fixing bracket, it is possible not only to connect and fix the ladders but also to fix the ladder to a single pipe such as a temporary scaffold.

  The ladder fixing bracket according to the present invention fixes a ladder in which a plurality of step bars are provided in parallel between two struts to a scaffold member constituting the scaffold, and the struts are arranged in the width direction of the ladder. It is formed in a U-shaped cross section from a pair of sandwiching parts sandwiched from both sides and a connecting part connecting the pair of sandwiching parts, and at least one of the pair of sandwiching parts is a step for fitting a step bar from the thickness direction of the ladder A rail fitting groove is provided, and a clamp is provided between the front ends of the pair of clamping parts to prevent the stepping rail from coming out. Or it is provided so that attachment or detachment is possible.

  The ladder fixing bracket of the present invention can be used not only for connecting the ladders but also for stabilizing the ladder by combining and fixing the ladder to a scaffold member constituting a temporary scaffold or the like in combination with the clamp fitting.

  Since the ladder fixing bracket according to the present invention is configured as described above, ladders in which a plurality of step bars are provided in parallel between two support columns can be connected and fixed safely and easily.

  Further, by providing a clamp fitting on the ladder fixing bracket, the ladder can be connected and fixed to a temporary scaffold or the like, and the ladder can be prevented from swinging.

It is a perspective view which shows the principal part in the use condition in one Embodiment of the ladder fixing metal fitting which concerns on this invention. It is a perspective view which shows only the ladder fixing metal fitting of embodiment of FIG. (a) is a plan view of the ladder fixing bracket of the embodiment of FIG. 1, (b) is a front view, (c) is a rear view (viewed from the ladder crossing side), and (d) is a right side view. . In the embodiment of FIG. 1, it is the perspective view which showed a mode that ladders were connected and fixed up and down. In other embodiment of the ladder fixing metal fitting which concerns on this invention, it is the perspective view which showed a mode that the ladder was fixed to a member to a scaffold.

  Hereinafter, the present invention will be described with reference to the accompanying drawings. In addition, this invention is not limited to embodiment shown below.

  1 to 4 show an embodiment of a ladder fixing bracket 1 according to the present invention, and FIGS. 1 and 4 show how ladders are connected and fixed vertically.

  As shown in FIGS. 2 and 3, the ladder fixing metal fitting 1 is formed in a U-shaped cross section from a pair of sandwiching portions 2a, 2b and a connection portion 3 connecting the sandwiching portions 2a, 2b. One clamping part 2b is provided with a stepping-bar insertion groove 4 and a rib-like folded part 6 is provided above and below the stepping-bar insertion groove 4. By providing the turn-up portions 6 above and below the stepping-bar insertion groove 4, the rigidity of the ladder fixing bracket 1 itself can be increased.

  Moreover, as shown in FIG. 1, since the folding | returning part 6 pinches | interposes the treads 13a and 13b of the upper and lower ladders 11a and 11b from the upper and lower sides, a wide contact area is obtained, so that the ladders 11a and 11b connected to the upper and lower sides are stabilized. It can be fixed and the shaking etc. when raising / lowering the ladders 11a and 11b are also reduced.

  A bent piece 7 that is bent outward is formed at the tip of the other clamping part 2a. Providing the bent piece 7 facilitates insertion when the ladder fixing bracket 1 is attached to the column 12 of the ladder 11. Further, a horizontally long eyebolt penetration hole 8 through which the eyebolt 5a constituting the fastener 5 is penetrated is formed at the distal end portion of the clamping portion 2a.

  The fastener 5 in the present embodiment is composed of an eyebolt 5a, a nut 5b, a locking round bar 5c passed through the hole of the eyebolt 5a, and the like, and the tip of the eyebolt 5a passed through the eyebolt penetration hole 8 of the clamping portion 2a described above. The locking round bar 5c is locked in a locking groove 6a formed in the folded portion 6 of the other holding portion 2b, and the nut 5b is tightened and fixed.

  The eyebolt penetration hole 8 provided in the clamping part 2a is fixed with a nut 5b in a state in which the eyebolt 5a is penetrated. 5, the ladder fixing bracket 1 can be mounted on the column 12 of the ladder 11.

  FIG. 4 shows how the ladders 11a and 11b are connected and fixed up and down in the present embodiment. In the connection work, first, the struts 12a and 12b are overlapped in the thickness direction so that the step bars 13a and 13b of the upper and lower ladders 11a and 11b to be coupled are positioned side by side.

  The ladder fixing bracket 1 is inserted into the ladders 11a and 11b in the thickness direction of the ladders 11a and 11b so that the stepping bars 13a and 13b are inserted into the stepping-bar insertion grooves 4, and the locking round bar 5c of the fastener 5 is inserted. The struts 12a and 12b and the tread bars 13a and 13b are fixed in the sandwiching portions 2a and 2b of the ladder fixing bracket 1 by being locked in the locking groove 6a and tightening the eyebolt 5a with the nut 5b.

  Fixing by the ladder fixing bracket 1 is performed at the same height of the columns 12a and 12b on both sides of the ladders 11a and 11b. In addition, the connection by the ladder fixing metal fitting 1 is not limited to one place, and a more stable connection state can be obtained if it is performed at two or more steps.

  FIG. 5 shows an embodiment in which the ladder 11 is fixed to a member constituting the scaffold using the ladder fixing bracket 1 of the present invention. For example, it can be used when the lower part of a suspended ladder is fixed to a single pipe 15 or the like of a scaffold and stabilized.

  In the present embodiment, the clamp fitting 14 is attached to the clamp fitting hole 9 (see FIG. 3) of the connecting portion 3 of the ladder fixing fitting 1.

  In the present embodiment, there is only one ladder 11 fixed to the ladder fixing bracket 1, but for example, the lower part of the pillar 12 of the ladder 11 in the suspended state and the step bar 13 at that position are shown in FIG. 4 described above. By the same operation as in the embodiment, the ladder fixing bracket 1 is fixed in the holding portions 2a and 2b.

  In this state, by fixing to the single pipe 15 or the like of the scaffold with the clamp fitting 14, the swing of the ladder 11 with the lower end suspended can be eliminated and stabilized.

  If a spacer 16 having a size corresponding to the cross section of the column 12 of the ladder 11 is sandwiched together in the clamping portions 2a and 2b of the ladder fixing bracket 1, the same ladder fixing bracket 1 as that of the embodiment of FIG. What attached the clamp metal fitting 14 can be used.

DESCRIPTION OF SYMBOLS 1 ... Ladder fixing bracket, 2a, 2b ... Holding part, 3 ... Connection part, 4 ... Treading-beam insertion groove, 5 ... Fastener, 5a ... Eye bolt, 5b ... Nut, 5c ... Locking round bar, 6 ... Folding part 6a ... locking groove, 7 ... bent piece, 8 ... eyebolt penetration hole, 9 ... hole for clamp fitting,
DESCRIPTION OF SYMBOLS 11 ... Ladder, 11a ... Upper ladder, 11b ... Lower ladder, 12 ... Column, 12a ... Upper ladder column, 12b ... Lower ladder column, 13 ... Step ladder, 13a ... Upper ladder step Cross, 13b ... Ladder on the lower ladder,
14 ... Clamp fitting, 15 ... Single pipe pipe for scaffolding, 16 ... Spacer

Claims (5)

  A ladder fixing bracket for vertically connecting and fixing ladders each having a plurality of step bars provided in parallel between two struts, the pair of sandwiching portions for sandwiching the struts from both sides in the width direction of the ladder and the pair of pairs It is formed in a U-shaped cross section from the connection part that connects the clamping part, and at least one of the pair of clamping parts is provided with a stepping bar insertion groove for inserting the stepping rail from the thickness direction of the ladder A ladder fixing bracket is provided between the distal ends of the pair of sandwiching portions, and a fastener is provided to prevent the step bar from coming off.   The ladder fixing metal fitting according to claim 1, wherein the fastener is an openable and closable fastener that is pivotally supported by one of the front end portions of the pair of holding portions and locked to the other. securing bracket.   3. The ladder fixing bracket according to claim 1 or 2, wherein a rib-like turn-back portion is formed above and below the step rail insertion groove so as to sandwich the step rail from above and below.   The ladder fixing metal fitting according to claim 1, 2, or 3, wherein a clamp metal fitting is integrally or detachably provided on the back side of the connecting portion.   A ladder fixing bracket for fixing a ladder, in which a plurality of step bars are provided in parallel between two struts, to a scaffold member constituting the scaffold, and a pair of sandwiching portions for sandwiching the struts from both sides in the width direction of the ladder; The connecting portion connecting the pair of sandwiching portions is formed in a U-shaped cross section, and at least one of the pair of sandwiching portions is provided with a step rail insertion groove for inserting the step rail from the thickness direction of the ladder. A clamp is provided between the front ends of the pair of sandwiching portions to prevent the step rail from coming out, and a clamp fitting is integrally or detachably attached to the back side of the connecting portion. Ladder fixing bracket characterized by being provided.

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