JPH068596U - Tread support device - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] The upper and lower ends of which the extension and contraction can be adjusted are connected to the arm so that the arm can swing vertically, and a horizontal frame locking device is provided at the swing end of the arm. By providing a horizontal frame locking tool and a vertical frame holding tool at the lower end portion, the mounting range can be expanded and the mounting and dismounting can be performed quickly and easily. [Structure] An arm 12 is vertically swingably connected to an upper end of a vertical rod 2 which is vertically adjustable.
The horizontal frame locking members 15 and 16 that bend in a U shape are provided at the swinging end of the vertical rod and the lower end of the vertical rod 2, and the horizontal rod that is the vertical rod 2 and is provided at the lower end of the vertical rod 2. A vertical frame holding tool 21 is connected to a position immediately above 14 so as to be rotatable at least in the vertical direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tread support device for supporting a tread that serves as a scaffold for work in high places.

[0002]

[Prior art]

 As a conventional technique, a large number of vertical bars (vertical frames) and horizontal bars (horizontal frames) are framed in a frame shape, and some vertical bars are arranged in two rows, and crossing arms for supporting the treads There was a structure that was tied and tied with a tie.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional art, since the arms are tied to the vertical wood with a wire and connected, there is a drawback in that the operation of connecting the arms requires a great deal of labor and skill. In addition, the horizontal bar can be installed only at the position where the vertical bar is arranged in two rows, which has a drawback that the mounting position of the horizontal bar is limited. It is an object of the present invention to obtain a new tread support device that solves the above drawbacks.

[0004]

[Means for Solving the Problems]

 The present invention is configured as follows in order to achieve the above object. That is, a vertical rod that can be adjusted to expand and contract in the vertical direction is provided, an arm is connected to the upper end of the vertical rod so as to be vertically swingable, and a horizontal end is provided between the swinging end of the arm and the lower end of the vertical rod. Fixing a horizontal rod extending in the direction, and providing a horizontal frame locking tool that bends in a U shape at both ends of the horizontal rod, which is a vertical rod and directly above the horizontal rod provided at the lower end of the vertical rod. A vertical frame holding tool is installed at the position, and the vertical frame holding tool connects a pair of opposing holding pieces with one end so as to be rotatable around the vertical axis as a pin, and at the other end, holds both holding pieces in the closing direction. It is configured such that a screwing tool for tightening is provided, and one holding piece is connected to the vertical rod so as to be rotatable at least in the vertical direction.

[0005]

[Action]

 Since the present invention is configured as described above, when the arm is rotated upward, the swinging end of the arm is engaged with the upper horizontal frame via the horizontal frame locking member. The lower end of the vertical rod is engaged with a horizontal frame or a vertical frame located below through a horizontal frame locking device or a vertical frame holding device, whereby the arm and the vertical rod are supported at two points. When the vertical rod is expanded and contracted in this state, the bending angle between the arm and the vertical rod is changed, and by adjusting the expansion and contraction amount of the vertical rod to a predetermined value, the arm is held horizontally and the tread plate is placed. Parts will be formed.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 is a side view showing an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a sectional view taken along line III--III of FIG. In FIG. 1, reference numeral 1 denotes a metal tread supporting device, which has the following structure. That is, reference numeral 2 is a vertical rod which can be adjusted to be expanded and contracted. A sliding rod 4 made of a small-diameter square tube is slidably fitted to a base rod 3 made of a large-diameter square tube so as to be slidable upward, Adjust the expansion and contraction with. In this adjusting tool 5, a large number of small holes 6 are formed in the sliding rod 4 at a predetermined pitch in the longitudinal direction, one locking hole 7 is formed above the lower part of the base rod 3, and the lower part of the base rod 3 is formed. After attaching the lock pin 8 to the upper part of the slide rod 4 and sliding the slide rod 4 with respect to the base rod 3 by a predetermined amount, the lock pin 8 is moved from the lock hole 7 to a predetermined position corresponding to the lock hole 7. The sliding rod 4 is inserted into the small hole 6 and fixed to the base rod 3 so as not to slide. As shown in FIG. 3, the locking pin 8 is curved in a U-shape, and one end 8a of the locking pin 8 can be laterally slidably attached to the side surface of the base rod 3 and the other end 8b thereof. Facing the locking hole 7, a coil spring 9 is attached to the one end 8a, and the other end 8b is moved and biased toward the locking hole 7 by the compressive force of the coil spring 9.

A bracket 10 is welded and fixed to an upper end portion of the sliding rod 4, and an arm 12 is connected to the bracket 10 by a pin (bolt) 11 so as to be vertically swingable. The left end (swing end) of the arm 12 and the horizontal rods 13 and 14 extending in the lateral direction are welded and fixed to the lower end of the base rod 3 described above. The horizontal rods 13 and 14 are formed of equilateral mountain-shaped steel material having upper surfaces 13a and 14a and right side surfaces 13b and 14b, and U-shaped horizontal frame locking members whose lower surfaces are open at both ends of the horizontal rods 13 and 14. 15 and 16 are fixed by welding. Further, the first tightening bolts 17 and 19 and the second tightening bolts 18 and 20 are vertically displaced on the right side surfaces 15b and 16b of the horizontal frame locking members 15 and 16 and the right side surfaces 13b and 14b of the horizontal rods 13 and 14, respectively. Screw it in.

A vertical frame holding tool 21 is attached to the lower portion of the base rod 3 and directly above the horizontal rod 14 provided at the lower end of the base rod 3. As shown in FIG. 2, this vertical frame holding tool 21 has semi-cylindrical holding pieces 21a and 21b facing left and right, and one end thereof is rotatably connected by a pin 22 arranged in the vertical direction. The support pin 23 is arranged in the up-down direction and rotatably attached to the other end of the holding piece 21b of the section, and the screw shaft 24 is projected and fixed to the left in the up-down direction intermediate part of the support pin 23. The collar 25 and the nut 26 are fitted to the left part of the screw shaft 24. In addition, a fitting groove (reference numeral omitted) is formed at the other end of the holding piece 21a on the left side, and the screw shaft 24 is removably fitted into this fitting groove, and the right end of the collar 25 is formed as a fitting groove. Engage with the edge, tighten the nut 26, and rotate the two holding pieces 21a, 21b in the closing direction. Further, the right holding piece 21b is rotatably connected to the base rod 3 by a pin 27 arranged in the lateral (horizontal) direction. The pin 27 integrally has a connecting bolt 28 protruding rightward, the connecting bolt 28 is passed through the base rod 3, and a nut 29 is screwed and locked at the right end thereof.

Reference numeral 30 denotes a connecting wire, which is inserted through the inside of the base rod 3 and the sliding rod 4 and whose upper end is connected to a locking tool 31 which is engaged with the top of the sliding rod 4 and whose lower end is connected to the base rod. When the sliding rod 4 is maximally projected from the base rod 3 by being locked to the connecting bolt 28 provided at the lower end of the rod 3, the connecting wire 30 is tensioned and the sliding rod 4 is inadvertently removed from the base rod 3. It is designed to prevent you from leaving.

Next, the usage of the above embodiment will be described. First, as shown in FIG. 1, when mounting the tread support device 1 on the ladder 35 standing on the wall, it is mounted as follows. Immediately, the horizontal frame engaging member 16 of the base rod 3 is fitted to the step rod 36 below the ladder 35, and the arm 12 is rotated leftward so that the horizontal frame engaging member 15 is placed on the ladder 35. The stepping rod 37 of the part is fitted. Then, the amount of expansion and contraction of the vertical rod 2 is adjusted. That is, as shown by the phantom line in FIG. 3, the locking pin 8 is moved in the disengagement direction against the coil spring 9 to disengage from the small hole 6 of the sliding rod 4, and in this state, the arm 12 moves horizontally. After sliding the sliding rod 4 vertically with respect to the base rod 3, the pressing force of the locking pin 8 is released, and the reaction force of the coil spring 9 causes the locking pin 8 to move into a predetermined small hole. Fit to 6. Then, the second tightening bolts 18 and 20 (or the first tightening bolts 17 and 19) of the horizontal frame locks 15 and 16 are tightened to move the horizontal frame locks 15 and 16 to the step rods 36 and 37. Lock. Then, the footboard 40 for scaffolding is placed on the upper surface of the arm 12.

Next, as shown in FIG. 4, when the tread support device 1 is attached to a frame in which a vertical frame 38 (vertical tree) and a horizontal frame 39 (horizontal tree) are framed in a grid pattern, they are attached as follows. . That is, the horizontal frame locking tool 15 of the arm 12 is fitted to the horizontal frame 39, and the vertical frame holding tool 21 of the base rod 3 is fixed to the vertical frame 38. In other words, the vertical frame 38 is sandwiched by the holding piece 21a on the left side and the holding piece 21b on the right side, and the holding pieces 21a, 21b are vertically moved along the vertical frame 38 so that the arm 12 becomes horizontal. Then, the screw shaft 24 is fitted into the fitting groove formed at the other end of the left holding piece 21a, and the nut 26 is tightened to move the left holding piece 21a through the collar 25. By moving in the direction of the right holding piece 21a, the vertical frame 38 is held by the holding pieces 21a and 21b, and the vertical frame holding tool 21 is fixed to the vertical frame 38. Next, the first tightening bolt 17 (or the second tightening bolt 18) of the lateral frame locking tool 15 is tightened to lock the lateral frame locking tool 15 to the lateral frame 39. Then, the footboard 40 for scaffolding is placed on the upper surface of the arm 12.

[0012]

[Effect of device]

 As is clear from the above description, the present invention can be appropriately attached to both the horizontal frame portions that are parallel to each other in the vertical direction and the intersecting portions of the horizontal frame and the vertical frame, so that the mounting range is expanded and the bolts are mounted. Since it can be attached and detached by the operation of, there is an effect that the attachment and detachment can be done quickly and easily.

[Brief description of drawings]

FIG. 1 is a side view showing a state in which the present invention is attached to a ladder.

FIG. 2 is a plan view of FIG.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a side view showing a state in which the present invention is attached to a frame framed in a grid pattern.

[Explanation of symbols]

 1 Stepping plate support device 2 Vertical rod 3 Base rod 4 Sliding rod 5 Adjusting tool 6 Small hole 7 Locking hole 8 Locking pin 8a One end 8b The other end 9 Coil spring 10 Bracket 11 Pin 12 Arm 13 Horizontal rod 14 Horizontal rod 15 Horizontal Frame Locking Tool 16 Horizontal Frame Locking Tool 17 First Tightening Bolt 18 Second Tightening Bolt 19 First Tightening Bolt 20 Second Tightening Bolt 21 Vertical Frame Holding Tool 21a Holding Piece 21b Holding Piece 22 Pin 23 Support Pin 24 Screw Shaft (screw) 25 Collar 26 Nut 27 Pin 28 Connecting bolt 29 Nut 30 Connecting wire 31 Locking tool 35 Ladder 36 Lower step rod 37 Upper step rod 38 Vertical frame 39 Horizontal frame 40 Tread plate

Claims (1)

[Scope of utility model registration request] 1. A vertical rod which can be vertically extended and contracted,
An arm is swingably connected to the upper end of the vertical rod in the vertical direction, and a horizontal rod extending in the horizontal direction is fixed to the swing end of the arm and the lower end of the vertical rod, and both ends of the horizontal rod are fixed. A horizontal frame locking tool that bends in a U-shape is provided in the portion, and a vertical frame holding tool is provided at a position vertically above the horizontal rod provided at the lower end of the vertical bar, and the vertical frame holding tool is provided. Is a pair of opposing holding pieces that are rotatably pinned at one end about the vertical axis, and at the other end a screwing tool that tightens both holding pieces in the closing direction, and one holding piece is vertically attached. A tread support device, which is connected so as to be rotatable at least in the vertical direction.