JPH0420916Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field] The present invention provides a base frame that is placed on a horizontal crosspiece of a stepladder and has a receiving part into which a scaffold board is inserted, and the horizontal crosspiece is compressed by loading the scaffold board. The present invention relates to a scaffold board fixing fitting that can firmly fix a scaffold board to a horizontal beam of a stepladder by providing a locking tool, thereby forming a safe scaffold.

[Background technology]

In construction, painting work, etc., stepladder scaffolding, in which scaffold boards are strung between the horizontal bars of stepladders placed side by side, is often used. During the work, the scaffolding board fell off the horizontal beam, creating a risk of falling accidents.

[Purpose of the invention] The present invention is capable of firmly fixing the scaffolding board to the horizontal beam by providing a locking tool for pinching the horizontal beam on the receiving part on the horizontal beam into which the scaffolding board is inserted, thereby solving the above-mentioned problem. The purpose of this invention is to provide a scaffold board fixing fitting that can solve the problem.

[Disclosure of invention]

In the figure, the scaffold board fixing fitting 1 has a receiving part 6 into which a scaffold board 5 is fitted, which is attached to the horizontal bars 3, 3 of the stepladders 2, 2 and placed on the horizontal bars 3 at right angles to the horizontal bars 3. The base frame 7 is provided with a hanging piece 9 and a locking tool 10 for pinching the horizontal beam 3 between the hanging piece 9.

The stepladder 2 is, as shown in FIGS. 1 and 3,
Ladder-like bodies A and B, which are formed by spanning horizontal beams 3 in multiple stages between parallel leg rods 15 and 15, are pivotally supported at their upper ends so as to be openable and closable. Furthermore, the leg rod 15 of one ladder-like body A,
A latch-like opening prevention tool 19 having a hook portion 19A at the tip is rotatably attached to the outer surface of the member 15 by a locking pin 17A, and is attached to a locking pin 17B provided on the other ladder-shaped body B. By locking the hook portion 19A, the ladder-like bodies A and B can maintain the opened state for the length of the opening prevention device 19.

The ladders A, B are opened at 180 degrees, and the ladders A,
It can be used as a ladder C that is twice the length of B, and a tool 21 to prevent it from folding in the middle is attached to the ladder-like body B. The breakage prevention tool 21 includes the locking pin 17B and a locking pin 17C provided on the top of the locking pin 17B.
A U-shaped groove 21A is provided at the tip of the base, which has an elongated hole 23 inserted therethrough and is slidably attached along the leg rod 15. The bending prevention tool 21 is
As shown by the dashed line in FIG. 3, by sliding downward and fitting the groove 21A into the base of the locking pin 17A, the ladders A and B become unbendable.

The horizontal beam 3 opens the ladder-like bodies A and B and prevents the device 19 from opening.
When forming a stepladder shape with the legs spread at a small angle using the ladder C, or when using it tilted as a ladder C by flipping up, the front and back sides are attached to the leg levers 15 so that the upper surfaces of the horizontal bars 3 are both horizontal. , and the upper and lower surfaces are inclined at a symmetrical inclination angle equal to the opening angle with respect to an axis perpendicular to the leg rod 15 .

In this example, the scaffolding board 5 is made up of four long crosspieces 27 placed side by side with a gap g in between, as shown in FIG.
A pair of frames 3 whose outer ends are fixed to a joint material 29
1A and 31B, with their inner ends facing each other,
The other crosspieces 27 are slidably inserted into each gap g, thereby making it expandable and retractable.
Note that the inner end of each frame 31A, 31B is connected to the upper and lower surfaces of the crosspieces 27 and connected to the other frame 31.
Rectangular annular slide fixtures 35A and 35B that go around the outer crosspieces 27 of A and 31B are attached. The slide fixtures 35A and 35B are each provided with bolts 39 that are screwed into screw holes 37 arranged in parallel with the other crosspiece 27, and can be fixed with the bolts 39.

The base frame 6 is formed by forming upright pieces 41 and 42 on both sides of the bottom plate 11 placed on the upper surface of the horizontal crosspiece 3 of the stepladder 2 at right angles to the horizontal crosspiece 3. A U-shaped receiving portion 6 with an open upper portion into which the portion 27 is inserted is formed. Also, on the back edge of the bottom plate 11,
An L-shaped hanging piece 9 is provided that hangs diagonally along one surface of the horizontal beam 3, in this example the back surface, and has a receiving piece 9a passing through the lower surface of the horizontal beam 3 at its lower end. Further, a contact piece 53 made of a high friction material such as a rubber sheet is attached to the inner surface of the lowering piece 9.

The upright pieces 41 and 42 have a width that extends beyond the front edge of the bottom plate 11 and protrudes from the horizontal crosspiece 3, and at the upper end of the upright piece 41 there is a width extending beyond the upper surface of the crosspiece 27 and outward in an arc shape. A bending guide portion 43A is formed. Further, the upright piece 42 is provided with a flange 42A protruding outward at a position lower than the upper surface of the scaffold board 5, and a guide piece 45 extending outward and diagonally upward is attached to the flange 42A via a spring piece 44. Fixed. The spring piece 44 has a base part 46 that is flush with the inner surface of the upright piece 42, a mounting part 47 that projects outward from the lower end of the base part 46 and is screwed to the flange 42A, and a mounting part 47 that extends horizontally inward from the upper end. It has a Z-shape with a protruding horizontal portion 48. Further, the guide piece 45 has a mounting portion 49 fixed to the horizontal portion 48 and a guide portion 43B extending outward from the inner edge of the mounting portion 49 and diagonally upward. Note that the guide piece 45 is
When the crosspiece 27 is inserted into the receiving part 6, the crosspiece 27 is moved outward by the spring piece 44 as shown in FIG.
7 is inserted therethrough, and its lower surface protruding into the receiving portion 6 prevents the crosspiece 27 from coming off upward.

The locking tool 10 has a pressing piece 13 facing downward and an abutting piece 12 joined to the upper end thereof, and is made of L-base hardware reinforced with reinforcing pieces 51. Projecting pieces 50, 50 are provided that extend rearward in the opposite direction to the contact piece 12. In addition, the locking tool 10 is such that the projecting pieces 50, 50 are attached to pins 49 that are inserted into horizontal elongated through holes 47, 47 at the lower ends of the front edges of the lowering pieces 41, 42. As a result, the locking tool 10 is pivotally supported on the base frame 7 so as to be freely tiltable.

The abutting piece 12 causes the pressing piece 13 to abut against the other surface of the horizontal beam 3, in this example the front surface, so that the scaffold board 5
The pressing piece 1 can be brought into contact with the lower surface, and the pressing piece 1
3 toward the front of the horizontal bar 3, and the horizontal bar 3 can be pressed between it and the vertical piece 9. Further, a contact piece 53 is attached to the inner surface of the pressing piece 13.

In the scaffold board fixing fitting 1, the locking tool 10 is flipped up, the lowering piece 9 is positioned on the back side of the horizontal beam 3, and the base frame 7 is placed on the horizontal beam 3. By fitting the crosspiece 27 of the scaffold board 5 into the receiving part 6, the crosspiece 27
The lower surface and the abutting piece 12 are in contact with each other, and the pressing piece 13 can be pressed against the front surface of the horizontal beam 3 by tilting due to the load.
As described above, the front and back sides of the horizontal beam 3 can be pressed between the lowering piece 9 and the pressing piece 13, and the scaffold board 5 can be firmly supported.

FIG. 7 shows another embodiment of the present invention in which the base frame 7 is provided with a pair of locking tools 10, 10 for pinching the front and back sides of the horizontal bar 3. In this example, the horizontal bar 3 has a cross section of form a rectangle.

The base frame 7 has upright pieces 41 and 4 on both sides of the bottom plate 11.
It has a U-shaped receiving part 6 with a raised part 2, and a piece 53 is attached to the inner surface of the receiving part 6.

The locking tool 10 is provided with an abutting piece 12 extending diagonally upwardly beyond the upper surface of the bottom plate 11 at the upper end of a pressing piece 13 that hangs down along the front or back side of the horizontal beam 3. The lower end of the base frame 7 is inserted into a notch 55 formed at a corner of the locking tool 10, and the locking tool 10 is pivoted to the upright pieces 41 and 42 using pins 56. Note that the pressing piece 13 of one of the locking tools 10 is connected to the lowering piece 9.
It consists of Therefore, by loading the scaffolding plate 5 onto the abutment piece 12, the locking tools 10, 10
3 and 13 to pinch the horizontal beam 3 between the vertical piece 9 and the pressing piece 13.

[Effect of idea]

As mentioned above, the scaffold board fixing fitting of the present invention has a base frame that is placed on the horizontal crosspiece of a stepladder and has a receiving part into which the scaffold board is inserted, a lowering piece and an abutment piece that protrudes from the top surface of the bottom plate. By attaching a locking device with a pressing piece, the horizontal beam can be clamped between the lowering piece and the pressing piece by loading the abutting piece of the scaffolding board, and the scaffolding board can be firmly attached to the horizontal beam. It can be fixed to the ground, prevent the scaffolding boards from falling off, form a strong and safe scaffolding, and have many other effects.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an embodiment of the present invention together with its usage state, Fig. 2 is an enlarged perspective view showing the scaffold board fixing fittings, Fig. 3 is a sectional view showing the upper part of the stepladder, and Fig. 3 is a sectional view showing the upper part of the stepladder. Fig. 4 is a perspective view showing the scaffold board, Fig. 5 is a side view showing the mounting state of the scaffold board fixing fittings, Fig. 6 is a front view thereof, and Fig. 7 is a perspective view showing another embodiment of the present invention. be. 2...Stepladder, 3...Horizontal beam, 5...Scaffold board, 6...
... Receiving part, 7 ... Base frame, 9 ... Hanging piece, 10 ...
Locking tool, 11... Bottom plate, 12... Contact piece, 13...
...Press piece.

Claims (1)

[Scope of utility model registration request] A base frame having a U-shaped receiving part that is open at the top into which a scaffolding board that is mounted on the horizontal crosspiece of the stepladder and placed at right angles to the horizontal crosspiece is inserted, along one side of the horizontal crosspiece. A hanging piece and a locking tool are attached, and the locking tool is connected to a pressing piece facing downward and in contact with the other surface of the horizontal beam, and the pressing piece is joined at a joint at the upper end of the pressing piece. A scaffolding plate fixing device having an abutment piece extending diagonally upward beyond the upper surface of a bottom plate of a receiving part and in a direction away from the receiving part, and in which the joint part is tiltably pivoted to the base frame.