JPH0577439U - Mobile folding scaffolding - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the mobility and safety of scaffolds used for interior work. [Structure] A support frame 5 is attached to one surface side of a ladder frame 4 so as to be freely foldable, and universal wheels 6 and 7 are attached to the lower portions of the ladder frame 4 and the support frame 5, respectively, and the lower portions of both are folded in two. And the ladder wheels 4 stand upright in an inclined state to support the load, so that the scaffolding plate 31 can be supported without rattling.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mobile folding scaffold used for constructing a work scaffold for interior work and the like.

[0002]

[Prior Art]

 In order to carry out interior work in high places such as ceilings and walls in the room, we constructed mobile work scaffolds so that work in high places can be performed smoothly.

A conventional mobile work scaffold is, for example, one in which a pair of support frames having free wheels attached to the bottom are connected by a brace in an upright state, and a scaffold plate is stretched between the upper ends of opposing support frames. It is known that a scaffold is constructed by stretching a floor plate on the upper surface of a frame frame with free wheels attached to the four lower corners, and arranging a required number of these scaffolds side by side.

By the way, the work scaffolding for interior work must be moved in the room as the work progresses, and is restricted by the opening portions such as entrances and exits during movement, and the vertical height changes due to the existence of beams and the like. Is also required.

Further, since the worker rests on the scaffolding plate to perform the work, if the scaffolding plate is loose, the posture during the work becomes unstable, which is extremely dangerous.

[0006]

[Problems to be solved by the device]

 However, all of the above-mentioned conventional mobile scaffolds have a structure that cannot be changed in the width direction, so it is difficult to move indoors. Since it had to be assembled, there was the problem that it took time to move each time.

Further, in all conventional scaffolds, since the portion supporting the load of the scaffold plate is vertical, there is a problem that the scaffold plate rattles.

Therefore, the present invention provides a movable folding scaffolding that can be folded in the width direction and can be moved smoothly in the room, and that the scaffolding plate does not rattle and work can be performed safely. The challenge is to provide.

[0009]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention makes it possible to freely fold along the ladder frame by pivotally fixing the upper end to the upper part of the vertical column on one surface side of the ladder frame in which a pair of vertical columns are connected by a horizontal bar. A supporting wheel is attached to the ladder frame and a lower portion of the supporting frame, and the free wheels are attached to the ladder frame and the lower portion of the supporting frame, respectively. The structure is such that they are connected by a folding rod, and a support base for a scaffolding plate is fixed to the upper end of the ladder frame so that the upper support surface is horizontal when the ladder frame is inclined and erected.

[0010]

[Action]

 A scaffold can be constructed by placing a scaffolding board on the upper support base of the adjacent ladder frame with the ladder frame and the support frame opened and the ladder frame standing up in an inclined shape. Therefore, the ladder frame can freely move and the ladder frame supporting the load of the scaffolding plate stands upright, so that the ladder frame can be stretched while supporting the load and the scaffolding plate can be supported without rattling.

Further, if the support frame is folded with respect to the ladder frame, the support frame becomes thinner in the width direction and can pass through the opening in the room without any trouble.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 5, a movable folding scaffold 1 is mounted on one surface side of a ladder frame 4 in which a pair of vertical columns 2 and 2 are connected by a plurality of horizontal crosspieces 3. Support frame 5, free wheels 6 and 7 attached to both sides of the lower part of the ladder frame 4 and both sides of the lower part of the support frame 5, two folding rods 8 connecting the ladder frame 4 and the lower part of the support frame 5, and a ladder frame 4 and a scaffolding board support 9 fixed to the upper end.

As shown in FIG. 9, the vertical columns 2 and 2 on both sides of the ladder frame 4 are formed by inserting an inner square pipe 11 into an outer square pipe 10 which is connected by a horizontal crosspiece 3 from the upper end so that the plate can be inserted freely. A through hole 13 for the pin 12 is provided in the upper part of the square pipe 10, and the inner square pipe 11 is provided with through holes 14 for the pin 12 at appropriate intervals along the axial direction. By selecting, the height of the support base 9 fixed between the upper ends of the inner square pipes 11 and 11 can be changed stepwise.

The horizontal rail 3 serves as a step rail when moving up and down, and both ends of the lowermost horizontal rail 3a project outward from the vertical columns 2 and 2, and free wheels 6 with brakes are attached to the lower portions of both ends thereof. ing.

The support frame 5 has two slanted rods 16 and 16 standing on the base rod 15 in an inclined manner at equal intervals to the vertical columns 2 and 2, and has free wheels with brakes at the lower ends of both ends of the base rod 15. 1 and 2 and FIG. 8, the hinge 17 is welded to the outer surface of the upper end of the outer corner pipe 10 in the vertical columns 2 and 2, and is attached to the ladder frame 4. The upper end of the inclined rod 16 is pivotally fixed to the tip of the bolt 17 by a bolt 18 so that the legs can be opened from the folded state along the ladder frame 4.

The two-folded rod 8 pivotally connects the lowermost horizontal rail 3a of the ladder frame 4 and the base rod 15 of the support frame 5 and extends linearly as shown in FIGS. 1 and 2. With the leg angles of the ladder frame 4 and the support frame 5 kept constant and the free wheels 6, 7 grounded, the ladder frame 4 and the support frame 5 incline in the opposite directions and load. Will be supported.

As described above, when the ladder frame 4 and the support frame 5 stand up while supporting each other with the reverse inclination, they try to spread to both sides due to the load, which prevents rattling of the load supporting portion. Further, since the ladder frame 4 is inclined, the operator can smoothly move up and down using the horizontal rail 3.

As shown in FIG. 10, the two-folding rod 8 connects a pair of rods 21 and 22 with a screw 23 so as to be bendable, and a spring 24 applies an elastic force to press the rods 21 and 22 against each other. In addition, an engaging piece 25 for holding the linear state of both rods 21 and 22 in such a manner that the linear state of both rods 21 and 22 can be bent to one side is provided at the end of the one rod 21, and the other rod 22 is pivotally stopped by a screw 23. A bending recess 26 is formed which fits into one rod 21 in a state where both rods 21 and 22 are bent at about 90 °.

As shown in FIG. 4, when the two-folding rod 8 is locked by the bending concave portion 26 in a bent state of about 90 °, the ladder frame 4 and the support frame 5 can be held in an intermediate state of folding, As a result, the width of the scaffold 1 can be narrowed while the movable wheels 6 and 7 can be moved, so that the scaffold 1 can be smoothly moved in a room having a doorway.

As shown in FIG. 3, the support base 9 has a length that supports three scaffolding plates 31 arranged in parallel, and the opposite L-shaped portions of the scaffolding plates 31 are fitted to both ends thereof. Character-shaped end walls 32 and 32 are provided, and are fixed to the upper end of the ladder frame 4 so that the upper support surface 33 is horizontal when the ladder frame 4 is inclined and erected. The support base 9 is provided with a low partition ridge 34 at the center of the upper support surface 33 over the entire length in the longitudinal direction, and supports both ends of the ridge 34 to support the end of the scaffold plate 31. There is.

As shown in FIG. 6 and FIG. 7, the scaffolding plate 31 is formed by using a metal plate to have a U-shaped cross-section downward, and the end fittings 35 having a U-shaped cross-section are fitted to both ends of the scaffolding plate 31. And the projections 36 are provided on the support surface 33 of the support base 9 at positions close to both ends, and the end fittings 35 of the scaffolding plate 31 placed on the support base 9 are partitioned as shown in FIG. It is accommodated between the line 34 and the protrusion 36 so that the support base 9 and the length direction of the scaffolding plate 31 are engaged with each other.

As for mounting the scaffolding plate 31 on the support base 9, as shown in FIG. 1, first, the scaffolding plate 31 is mounted near both ends of the support base 9 and fitted into the end walls 32, 32. In this state, next, the last scaffold plate 31 may be dropped between the scaffold plates 31 on both sides, and the three scaffold plates 31 can be stably held in the parallel state.

A pair of locking metal fittings 37 are fixed to the outer surfaces of both ends of the support base 9, respectively, and the end hooks 39 of a separately prepared connecting plate 38 are locked to the locking metal fittings 37, so that adjacent scaffolds are supported. The connection plate 38 is installed between the support bases 9 of 1 and the scaffold plate 31 is laid between the parallel connection plates 38 so that a work scaffold can be formed.

In the scaffolds 1 arranged to face each other, the lowermost horizontal rail 3a of the ladder frame 4 and the base rod 15 of the support frame 5 are provided with a downwardly U-shaped hook 40 at both ends as shown in FIG. It is designed to be connected by a connecting bar 41 provided with. When the scaffolding 1 and the scaffolding plate 31 are combined, the connecting bar 41 can be omitted from use.

Further, the support base 9 may have a supporting surface formed into a flat by omitting the partition ridges 34 and the protrusions 36 as shown in the figure, so as to support the wooden scaffolding board.

The scaffold of the present invention is constructed as described above, and in order to construct a work scaffold using a plurality of scaffolds 1, as shown in FIG. 1, the folding folds 8 of each scaffold 1 are extended to form a ladder frame. 4 and the supporting frame 5 are opened, and the supporting base 9 of the ladder frame 4 standing upright in an inclined state is set to a desired height. By installing the scaffolding plate 31 between the support bases 9, a work scaffolding in which three parallel scaffolding plates 31 are continuously arranged in the longitudinal direction is completed as shown in FIG. 7 makes it possible to move.

Further, as shown in FIG. 12, if a plurality of the work scaffolds are arranged side by side, adjacent support bases 9 are connected by a connecting plate 38, and a scaffolding plate 31 is stretched between the connecting plates 38, a planar view is obtained. A wide stage can be built.

In the work scaffold constructed as described above, as shown in FIG. 2, since the ladder frame 4 and the support frame 5 that support the load stand up with opposite inclinations, they stick to each other and rattling occurs at all. Since it does not twist, the work on the scaffolding plate 31 can be stably performed, and the safety can be improved. Further, the height of the scaffolding plate 31 can be adjusted easily and easily by changing the height of the support base 9 by inserting and removing the pins 12.

As shown in FIG. 5, if the scaffold 1 is folded by folding the double-folding rod 8 in half, the ladder frame 4 and the support frame 5 become substantially parallel to each other, and the support frame is supported by the stopper 42 of the ladder frame 4. 5 comes into contact with each other, and the folding rod 8 is housed between the ladder frame 4 and the support frame 5, making the entire structure thin and convenient for storage and transportation, and the directions of the free wheels 6, 7 are alternated. It is possible to stack and store in reverse order.

FIG. 4 shows a state in which the scaffolding 1 is moved and passed through a narrow opening such as a doorway in a room. The two folding rods 8 are bent at a substantially right angle so that the ladder frame 4 and the support frame 5 are joined together. Hold in a semi-open state and move the scaffold 1 with a narrow width.

[0032]

【effect】

 As described above, according to the present invention, the support frame is foldable with respect to the ladder frame, so that even a narrow portion such as an opening in the room can be passed through, and movement in the room can be performed smoothly. At the same time, the folding makes it bulky and easy to carry and store.

Further, since the ladder frame and the support frame stand upright in a state of being tilted in the opposite directions to support the scaffolding plate, the load can be supported without rattling, and the work safety on the scaffolding plate can be improved. At the same time, the ladder frame stands upright so that you can climb up and down the scaffolding board smoothly.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a scaffold according to the present invention.

FIG. 2 is a partially cutaway front view of the above.

FIG. 3 is a side view of the above.

FIG. 4 is a front view showing the above half-opened state.

FIG. 5 is a front view showing the folded state of the above.

FIG. 6 is a vertical sectional front view showing an enlarged support base portion.

FIG. 7 is a vertical cross-sectional side view in which a support base is enlarged.

FIG. 8 is a cross-sectional view showing a mounting portion of a ladder frame and a support frame.

FIG. 9 is a vertical sectional view showing a height adjusting portion of a ladder frame.

FIG. 10 is a cross-sectional plan view showing the structure of the double-folded rod.

FIG. 11 is a perspective view showing a first example of an assembled scaffold.

FIG. 12 is a perspective view showing a second example of the above.

[Explanation of symbols]

 1 Folding scaffolding 2 Vertical column 3 Horizontal cross 4 Ladder frame 5 Supporting frame 6, 7 Flexible wheel 8 Two-folding rod 9 Scaffolding board support stand 31 Scaffolding board

Claims (1)

[Scope of utility model registration request] 1. A ladder frame having a pair of vertical columns connected to each other by a horizontal crosspiece, and a support frame which is pivotally fixed at an upper end to an upper portion of the column and is foldable along the ladder frame. And a free wheel attached to the lower part of the support frame, and the ladder frame and the lower part of the support frame are connected by a double-folding rod that holds the ladder frame and the support frame in an open-leg state in which the ladder frame and the support frame are inclined and stand upright. A movable foldable scaffold with a scaffolding board support fixed to the upper end of the so that the upper support surface is horizontal with the ladder frame tilted upright.