JPH026190Y2 - - Google Patents

Description

[Detailed description of the invention] In recent years, safety at construction sites has become particularly strict.

Therefore, in order to meet the above objectives, the present invention can be opened and closed easily and smoothly, and can be freely attached and detached at any point on the straight section of the steel frame, and can also be attached and detached even when placed in the corner of the steel frame, making it easier to work. It is convenient, and on the other hand, it is strong and stable without warping or rattling, and even if the connecting pins of the hanging equipment should come off, the floorboards and handrails will remain in an upright position, making it safe. The present invention relates to a foldable scaffold which is convenient in that it has no obstructions above the handrail and has a wide space for easy work.

To explain the structure of one embodiment of the present invention shown in the drawings, 1 is the underframe of the folding scaffold, and the main pillars 2 on both sides are square pipes with a rectangular cross section that are long in the front and back direction.
The upper end, middle part, and lower end of 2 are connected by a horizontal crosspiece 3 made of a square pipe. Reference numeral 4 denotes a floorboard having a rear part formed in a convex arc shape and a skirting board standing up on the peripheral edge. Arms 5 are fixed to both sides of the front end of the floorboard by protruding diagonally forward and upward, and between the protruding parts of the armrests 5 on both sides. The underframe 1
The tip of the cross arm 5 is fitted onto the lower end of the main column 2,
A floor plate 4 is pivotally connected to the underframe 1 by a shaft 6 so as to be rotatable only upward from a standing state at right angles. Reference numerals 7 and 8 are upper and lower handrails made of square pipes that are parallel to each other at appropriate intervals above the floor plate 4 and are open in the front. Arms 9 and 10 are fixed to the sides of both front free ends of the handrails 7 and 8 so as to protrude diagonally forward and upward, and the protruding portions of the armrests 9 and 10 are attached to both sides of the underframe 1. The cross arm 9 fits between the main pillars 2,
The tip of the shaft 10 is connected to the main pillar 2, and the handrails 7 and 8 are attached to the shaft 1 so that they can rotate only upward from the standing position perpendicular to the underframe 1.
1 and 12, respectively, and the upper and lower ends of the connecting rod 13 are connected to the intermediate portions on both sides of the handrails 7 and 8 by pins 14 and 1.
5, and the main pillar 2, handrails 7, 8, and connecting rod 13 constitute a parallel movement mechanism.

Reference numeral 16 denotes a bendable and extensible hanging device, which is constructed by pivotally connecting an upper hanging member 17 and a lower hanging member 18 with a pin 19. are pivotally attached to the lateral intermediate portions of the floorboard 4 by pins 20 and 21, respectively, and the upper hanging member 17 is biased in the direction of the arrow in FIG. 5 by a spring 22 fitted to the pin 20. Reference numeral 23 denotes a handrail hanging member, and pins 24 and 25 are attached to both ends of the handrail hanging member 24 to the middle part of the upper hanging member 17 and the lateral middle part of the lower handrail 8.
They are respectively pivoted. 26 is a rotatable pull handle detachably attached to the rear center of the upper handrail 7.

Reference numeral a indicates scaffold fixtures on both sides, and reference numeral 27 indicates base metals on both sides, which are fixed to the upper part of the main pillar 2 by protruding forward. Reference numeral 28 denotes a mounting metal whose base portion is fitted between the front protruding portions of the base metals 27 on both sides, and is pivoted by a bolt 29 so as to be movable up and down. Reference numeral 30 denotes a tightening bolt, and a U-shaped metal 31 installed at the base end thereof is fitted into a flat end portion of the mounting metal 28, and is pivotally connected by a pin 32 so as to be rotatable left and right. Reference numeral 33 denotes a locking pawl whose proximal cylindrical body is loosely fitted onto the tightening bolt 30, and the distal end of the pawl piece is bent rearward. 34 is a nut screwed onto the tightening bolt 30 in front of the locking pawl 33, and an operating piece 35 is provided on this nut. A is an I-shaped steel frame of a concrete building.

Next, we will explain how to use the foldable scaffolding.
The scaffolding is folded as shown in Figure 4, and the worker carries it onto the steel frame A of the concrete building.

Therefore, as shown in Fig. 2, when installing on a straight section of steel frame A, attach the mounting fixtures a on both sides with bolts 29 at the required locations on steel frame A as shown in Fig. 1.
After standing up using the base metal 27 as a fulcrum, place the front protruding part of the base metal 27 on the steel frame A, apply the base frame 1 to one side edge of the steel frame A, and then attach the locking claws 3 of the fixtures A on both sides.
3 on the other side of the upper side of steel frame A, and
When the nut 34 is screwed in, the locking claws 33 are hooked on the upper piece of the steel frame A, and the locking claws 33 on both sides are connected to the underframe 1 .
3, the scaffold is fixed to the steel frame A by sandwiching the upper side of the steel frame A, and the scaffold is suspended from the steel frame A in a vertical state.

Next, when the operator removes the pull handle 26 from the upper horizontal crosspiece 3 and pushes the handrail 7 backward, the spring 22
The hanging member 17 rotates backwards using the pin 20 as a fulcrum against the elasticity of the hanging member 16, and the hanging member 16 extends while the hanging member 23 descends and connects the connecting member 13 and the handrail 7 via the connecting rod 13. , 8 move in a parallelogram manner with the main pillar 2, and the floorboard 4 and handrails 7, 8 rotate downward about the shaft rods 6, 11, 12, respectively. When the hanging tool 16 is fully extended as shown in FIG. is opened and held in that open position so that scaffolding can be installed on the straight section of steel frame A.

On the other hand, when removing the scaffolding, the worker must
If you climb up and pull the handle 26 toward you, the elasticity of the spring 22 will cause the hanging tool 16 to
As the hanging members 17 and 18 are bent upward into a ∧ shape and folded, the hanging member 23 rises, and, contrary to the above,
The floorboard 4 and handrails 7, 8 are made of shaft rods 6, 11, 12.
The scaffold rotates upward using the scaffold as a fulcrum, and as shown in FIG. 4, the scaffold is folded so that it overlaps the rear surface of the underframe 1 . Next, the puller 26 is rotated and hooked onto the upper end horizontal beam 3 to lock the scaffold in the folded state.

Then, by unscrewing the nut 34 using the operation piece 35 and moving the locking pawl 33 forward, removing the pawl from the steel frame A and lifting the scaffold, the scaffold will be moved to the steel frame A.
After that, the fixture a is rotated in the opposite direction to the above using the bolt 29 as a fulcrum to align it with the underframe 1 as shown in Fig. 4, and the worker carries the folded scaffold. carry it.

On the other hand, as shown in Fig. 7, when installing the scaffolding at the corner of the steel frame A, after carrying the folded scaffold to the required corner of the steel frame A, attach the fixtures a on both sides with the bolts 2
9 as a fulcrum, and the tightening bolt 30 is appropriately rotated outward using the pin 32 as a fulcrum to open the fittings a, a first.

Therefore, in the same manner as above, place the front protruding parts of the base metals 27 on both sides on the beams on both sides of the steel frame A, and then operate the fixtures a on both sides in the same manner as above to attach the base frame 1 and the fixtures on both sides. The scaffolding is fixed to the steel frame A by pinching the upper sides of both side beams of the steel frame A with the locking claws 33 of a. Therefore, after that, when the worker removes the pull handle 26 from the upper end horizontal beam 3 and pushes the handrail 7 backward to open the scaffold in the same manner as above, the scaffold is installed at the corner of the steel frame A across the beams on both sides. be able to.

On the other hand, when removing the scaffolding, after folding and locking the scaffolding in the same manner as above and removing it from both side beams of the steel frame A, attach the fixtures a on both sides by rotating them inward using the pins 32 as fulcrums. The scaffolding is folded by bringing the tools a and a into a parallel state and rotating them downwards using the bolt 29 as a fulcrum to align them with the underframe 1 .

Note that the connecting rod 13 may be placed at the position of the pin 25, and the lower ends of the connecting rod 13 and the hanging material 23 may be pivotally connected to the handrail 8 by the pin 25.

The foldable scaffold of the present invention has the following remarkable effects.

(1) The upper and lower handrails are shaped like pipes, and the armrests on both sides of the front end are pivoted to the main pillars on both sides of the underframe. (a) The handrails are strong and difficult to deform.

(b) The handrails are securely attached to the main pillars on both sides of the underframe, and the handrails do not warp or wobble even when workers are inside the scaffolding, allowing workers to work comfortably and with peace of mind. can.

(2) By forming the rear of the floorboard and upper and lower handrails into a convex arc shape, when a worker enters the scaffold and works facing forward, the distance from the worker's back to the handrail is approximately equal. In addition, since the work space is expanded, there is no mental pressure on the worker, and the worker can work comfortably and with peace of mind, reducing fatigue and increasing work efficiency.

(3) The front of the floorboard and both front free end surfaces of the upper and lower handrails should approach and face the rear surfaces of both main pillars of the underframe, respectively, and the front ends of the floorboard and the upper and lower handrails should each have a front end facing diagonally forward and upward. Projecting armrests were attached, and the tips of these armatures on both sides were pivoted to the main pillars on both sides so that the floorboard and upper and lower handrails could rotate only upwards from a standing position perpendicular to the underframe. Therefore, (a) Even if the connecting pins of the hanging equipment should come off, the floorboards and upper and lower handrails will be locked to the main pillars on both sides in an upright position and will not come down, making it easy for workers to This is extremely beneficial in terms of safety as it will not fall.

(b) When folding the scaffold, the floorboards and upper and lower handrails are in good condition so that the scaffold can be folded as thinly as possible along the underframe.

(4) Scaffolding fixtures on both sides can be rotated vertically and horizontally. Therefore, (a) In addition to straight sections of the steel frame, at corners, if the scaffolding fixtures on both sides are opened first and attached to the beams on both sides of the corner of the steel frame,
Scaffolding can be installed at the corner of the steel frame across the beams on both sides, making it highly versatile and convenient for work.

(b) When folding the scaffold, the scaffold attachments on both sides can also be folded along the underframe to make the scaffold smaller.

(5) It has a simple structure, can be manufactured easily and inexpensively, operates light and smoothly, and is securely fixed.

[Brief explanation of the drawing]

Fig. 1 is a side view of a folding scaffold according to an embodiment of the present invention, Fig. 2 is a plan view, Fig. 3 is a slope view, Fig. 4 is a side view of the scaffold in a folded state, and Fig. 5 6 is a plan view, and FIG. 7 is a plan view of the scaffold attached across the corner of the steel frame. 1 ...Underframe, 2...Main pillar, 4...Floor plate, 5...
Bracelet, 6... Axle, 7, 8... Handrail, 9, 10
...Archive, 11, 12... Axis rod, 13... Link rod,
16... Hanging tool, 23... Handrail hanging material, a...
Scaffolding fixture, A...Steel frame.

Claims (1)

[Scope of utility model registration request] The floorboard and the upper and lower handrails, which are made of pipes and are arranged in parallel at appropriate intervals above the floorboards, are open in the front, and the rear parts of the upper and lower handrails are formed into a convex arc shape, and the sides on both sides of the front end have arms that protrude diagonally forward and upward. wearing gold,
The front surface of the floorboard and the front free end surfaces of the upper and lower handrails are closely opposed to the rear surfaces of the main pillars on both sides of the underframe, respectively, and the protruding parts of the armrests on both sides of the floorboard and the upper and lower handrails are connected to the main pillars on both sides of the underframe. The tips of the armrests on both sides are pivoted to the main pillars on both sides of the underframe so that the floorboard and the upper and lower handrails can rotate only upward from a standing position perpendicular to the underframe, and the upper and lower handrails are The lateral middle part of the handrail is connected by a connecting rod, and the main pillar, upper and lower handrails, and connecting rod form a parallel movement mechanism, and the upper and lower hanging members are pivotally connected with pins. Connect the upper part of the main pillar and the lateral middle part of the floorboard using a hanging tool, and connect the middle part of the upper hanging material of the hanging tool to the lateral middle part of the lower handrail using a handrail hanging material. , a folding type scaffolding in which the rear base ends of scaffolding fixtures that can be attached to and detached from the steel frame are attached to the tops of the above-mentioned main columns on both sides so as to be able to rotate vertically and horizontally.