JPH0247139Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] This invention relates to scaffolding for staircases and stairwells, and is mainly used for interior work in stairwells and various stairwells during the construction of ordinary houses. This invention relates to a suitable scaffold for stairs and atriums.

[Technical background of the invention and its problems] Conventionally, for example, when constructing a general house,
Interior work for stairwells and various types of atriums is carried out by temporarily erecting appropriate scaffolding because the work support surfaces are stepped or low. In particular, installation in these locations is troublesome due to the narrow space, such as installing scaffolding boards on stepladders, or installing scaffolding boards on stair handrail walls and window frames. Even if installed, the work surface was extremely narrow, and in such a narrow work area, workability was poor and the danger was great.

In order to improve these, for example,
52-27128 Publication, Utility Model Application Publication No. 55-94333, Publication of Utility Model Application No. 55-142288, Publication No. 1987-154548,
Japanese Utility Model Publication No. 57-53806 proposes several scaffolds for use as scaffolds in staircases. However, all of these are troublesome to handle, do not have the versatility to be modified and applicable to various types of stairs such as straight stairs, J-shaped stairs, U-shaped stairs, L-shaped stairs, etc. There were drawbacks such as difficulty in getting workers in and out when going up and down narrow stairs.

[Purpose of the invention] Therefore, this invention was devised in view of the existing drawbacks as described above and to eliminate these. It has the versatility to be used in various interior work, and can also be used as a scaffolding in the atrium.It can also be easily assembled and dismantled even in narrow spaces, and it also improves the efficiency of various interior work.
The purpose of this invention is to provide scaffolding for stairs and stairwells that can improve safety.

[Summary of the invention] Therefore, in this invention, the components are standardized to enable modification and combinations, and the assembly and disassembly of these members can be done in one touch. A long base frame and a short base frame, each comprising a long base frame and a short base frame, each comprising an appropriate number of horizontal beams placed horizontally between support members connected to each other on a jack base and arranged facing each other on the left and right sides, and the jack base;
A standard frame consisting of a long base frame, a short base frame, connected to each other, and an appropriate number of horizontal beams placed horizontally between the supporting columns of a predetermined standardized length, which are arranged facing each other on the left and right sides;
Scaffolding boards installed between the horizontal beams of the long base frame, short base frame, and standard frame, and handrails installed between the horizontal beams of the long base frame, short base frame, and standard frame. a frame, a locking mechanism for the scaffolding board and handrail frame that engages with the horizontal beams of the long base frame, the short base frame, and the standard frame, and gripping the support members of the long base frame, the short base frame, and the standard frame; a steady rest metal fitting that is supported in contact with a predetermined wall surface; and a locking member with an engaging edge recessed in one of the front and rear side walls of each support member of the long base frame, short base frame, and standard frame that are arranged adjacent to each other. It is equipped with a connecting metal fitting that engages and connects to the matching recess, and these jack bases, long base frames, short base frames, standard frames, scaffolding boards, handrail frames, steady rest metal fittings, and connecting metal fittings are selectively combined with each other. This makes it possible to construct a work surface of a predetermined height in a stairwell or an atrium.

[Embodiments of the invention] Hereinafter, embodiments of the invention will be described with reference to the drawings.

Reference numeral 10 shown in the figure is a jack base, and a circular base plate 12 is attached to the lower end of a bolt body 11 having a predetermined length and a male thread formed on the outer periphery.
It is made by fixing to the work surface such as the riser surface of stairs or the floor surface.
A protection plate 13 made of rubber or a soft elastic material similar to rubber is attached to the lower surface of the base board 12.

Further, 20 is a long base frame which is screwed and connected to the jack base 10, and is made up of an appropriate number of hollow cross members 22 horizontally arranged between hollow support members 21 arranged oppositely on the left and right sides, Further, 30 is a short base frame which is also screwed and connected to the jack base 10, and is made up of an appropriate number of hollow horizontal support members 32 horizontally arranged between hollow support members 31 arranged oppositely on the left and right sides. .
Both the long base frame 20 and the short base frame 30 have substantially the same basic structure, and they have different heights corresponding to the difference in steps when used in stairs, for example, the height of 5 steps. The lengths of the strut members 21 and 31 are different from each other. These long base frames 2
0. The short base frame 30 is a long brace that is arranged along the front-rear direction on the installation surface and is removably fixed to gravity locks 25, which will be described later, provided on the side surfaces of the respective support members 21 and 31. They are connected to each other by 35.

Reference numeral 40 denotes a standard frame, which can be placed at the same height directly on the jack base 10, or by the long base frame 20 and short base frame 30, which have different heights in the case where there is a step in the staircase room as described above. A suitable number of tiers are stacked and connected on top of the flat surfaces to ensure the height to the work surface. Its structure is approximately the same as the long base frame 20 or the short base frame 30, and the jack base 10
Support members 41 are connected to the top by screws or connected to the long base frame 20 and the short base frame 30 and are rated at a predetermined length.Hollow cross members 42 are provided between each other.
The standard frame 40 is placed horizontally, and the standard frame 40 is placed front and rear.
A gravity lock 25, which will be described later, is provided on the side surface of the strut member 41 for mounting X-shaped short braces 45 that connect each other.

Incidentally, the gravity lock 25 is attached to the support members 21, 31, 41, as shown in FIG. 5 or 6.
A fixing pin 2 has a built-in locking piece 28 that elastically retracts from a base plate 26 that is screwed and fixed to the side surface.
7 is fixedly installed, and the fitting hole 3 is opened in the crushed portion of both ends of the long brace 35 or the short brace 45.
6 and 46 onto the fixing pin 27, and lock the lock piece 28.
By engaging with each other, the long base frame 20 and the short base frame 30 are connected to each other by the long brace 35, or the standard frames 40 are connected to each other by the short brace 45.

Therefore, the strut material 2 in the long base frame 20
1. The struts 31 in the short base frame 30 and the struts 41 in the standard frame 40 are both formed of shaped materials having the same structure, such as extruded aluminum products. That is, as shown in FIGS. 5 and 6, the four corners of the hollow body, which has a substantially square cross section, are chamfered and concave to form an octagonal cylinder shape, and the outer surfaces of the opposing left and right side walls are each provided with shallow holes. A bottom-shaped engagement surface 1 is recessed, and a deep-bottomed engagement recess 2 with an engagement edge 3 along the opening edge is provided in one of the opposing front and rear side walls. It is.
When the long base frame 20, the short base frame 30, and the standard frame 40 are combined and arranged, the horizontal beams 22,
32 and 42 are installed horizontally between the engaging surfaces 1, and
The front and rear side walls in which the engagement recesses 2 are formed face forward or rearward.

The horizontal beams 22, 32, and 42 are made of extruded aluminum material and have an elongated rectangular cross section, and have C-shaped fixing grooves 4 along the inner surfaces of the upper and lower side walls. It is something. Then, these horizontal beams 22, 32, 42 and each support 2
1, 31, and 41, as shown in FIG.
This is done by fitting both ends of 2, 32, and 42, and screwing the fixing screw 6, which is penetrated from the outside and accommodated in the strut members 21, 31, and 41, into the fixing groove 4. Furthermore, connection holes 5 are drilled at both ends of the horizontal beams 22, 32, and 42 for connecting a scaffold board 50 and a handrail frame 60, which will be described later.

The screw connection between the jack base 10 and the long base frame 20 or the short base frame 30, as well as the screw connection between the jack base 10 and the standard frame 40, is performed via a jack nut 15, which is shown in FIG. As shown, the insertion connecting pieces 16 having a substantially square cross section and facing each other so as to abut on the inner surfaces of the left and right side walls of each of the struts 21, 31, 41 are brought into contact with the lower end surfaces of each of the struts 21, 31, 41. A nut body 18 into which the bolt body 11 of the jack base 10 is screwed is fixed to the lower surface of the support piece 17, and a hole communicating with the female screw hole of the nut body 18 is bored in the support piece 17. Each support material 21, 3
The charging connecting piece 16 inserted into each of the supporting columns 21, 31, 41 is screwed to the left and right side walls of each support member 21, 31, 41.

Further, vertical connections between the long base frame 20 and the standard frame 40, between the short base frame 30 and the standard frame 40, and even between the standard frames 40 are performed by a joint pipe 48. is formed into, for example, an octagonal cylindrical shape so as to be fitted externally to the ends of the strut members 21, 31, 41, and is fixed with screws in an externally fitting state. In the illustrated example, a long base frame 20, a short base frame 30, a standard frame 4
The upper ends of the support members 21, 31, and 41 of each of the support members 21, 31, and 41 are fixed in advance with screws, and by doing so, the lower ends of the support members 41 of the standard frame 40 connected upward can be simply inserted, allowing smooth stacking. A retaining pin 49 can be inserted therethrough if necessary.

A scaffold board 50 serving as a work surface and a handrail frame 60 for ensuring safety are mounted between the long base frame 20, short base frame 30, and standard frame 40 arranged in the front-rear direction.

As shown in FIGS. 7 and 8, the scaffolding board 50 is provided with engaging portions 65 at the front and rear so as to be engaged with the horizontal beams 22, 32, and 42, and the supporting pillars 21
Side rods 51 arranged on the left and right having the same cross section as
A plurality of mounting rods 52 each having an uneven anti-slip surface 53 are horizontally suspended between them, and a door portion 55 is swung to either the front or rear so as to be able to open and close upward. It is what it is. The door portion 55 is
Abuts against a base door frame member 57 with a groove-shaped cross section that is pivotally connected to either one of the side bars 51 via a hinge 56 and a stopper 58 with an L-shaped cross section that runs along the lower part of the other side bar 51. Supported door frame material 5 with groove-shaped cross section
9, a plurality of mounting rods 52 as described above are horizontally suspended in parallel.

Note that the mounting rod 52 has a flat approximately angle C in cross section.
Inside the character shape there is a side rod 51 and a base door frame material 5.
7. The door frame material 59 consists of a pair of fixing grooves with a C-shaped cross section extending from the outside into which fixing screws are screwed from the outside, and a rubber or rubber-like material is provided between the stopper 58 and the door frame material 59. By interposing a soft elastic material,
This is intended to cushion the collision between the stopper 58 and the door portion 55.

Moreover, the handrail frame 60 includes the horizontal beams 22, 32,
The horizontal rod 61 is provided with engaging portions 65 at the front and rear so as to be engaged with the support rod 42, and has a cross section having the same structure as the support member 21.

The engaging portion 65 has a hook piece 66 with a groove-shaped cross section that engages with the horizontal beams 22, 32, and 42 from above. A resilient locking mechanism 67 is provided to facilitate and ensure engagement with the members 22, 32, and 42. That is, this locking mechanism 67, as shown in FIG.
Side rod 51 or horizontal rod 61 with the same structure as 1
At one end of a lock body 68 having a substantially inverted U-shaped cross section, the lock body 68 is screwed into contact with the left and right side walls and the inner surface of the upper wall of the side rod 51 or horizontal rod 61 with the engagement recess 2 facing downward. Groove-shaped hook piece 66
A pin insertion hole 70 is formed in a pin fixing piece 69 fixed in the lock body 68.
and a pin retraction hole 71 bored in the side wall of the fixing side of the hook piece 66, by protruding into the hook piece 66 to fit into the connecting hole 5, and by slanting only the lower surface of the tip. The tip is the protruding end 72
A lock pin 72 is slidably inserted into the lock pin 72, and the hook piece 6 is inserted into the lock pin 72 at a position where only the protruding and retracting end 72A protrudes into the hook piece 66.
6, the operating rod 73 that comes into contact with the outer surface of the side wall is fixed, and a coiled spring 74 is fitted between the operating rod 73 and the pin fixing piece 69, and the retractable end 72A is fixed to the hook. It is designed so that it always protrudes elastically within the piece 66. When this locking mechanism 67 is installed in the end of the side rod 51 or the horizontal rod 61, the operating rod 73 is a slide cut into the bottom wall of the engagement recess 2, which also serves to prevent the rotational phase shift of the protruding and retracting end 72A. Moving guide notch 75
The lock pin 72 is moved out from below the side rod 51 or the horizontal rod 61, and the lock pin 72 is disengaged from the connection hole 5 by sliding the operating rod 73 that has been moved out in this way. be.

Therefore, such a resilient locking mechanism 6
7. In other words, the lock pin 72, which slides elastically into the connecting hole 5 drilled in the crosspieces 22, 32, and 42, is retracted when engaging the crosspiece 22 from above; A locking mechanism 67 that is inserted forward into the connecting hole 5 at the connecting hole 5 position and can be retreated and removed from the connecting hole 5 using an operating rod 73 attached to the lock pin 72 itself is attached to both ends of the side rod 51 of the scaffold board 50, and to the handrail frame 60. The engaging portions 6 at both ends of the horizontal rod 61 in
5, the scaffolding board 50 or the handrail frame 60 can simply place the engaging portion 65 on the horizontal beams 22, 32, and 42 of the long base frame 20, short base frame 30, and standard frame 40 from above. By placing and engaging the lock pin 72, the protruding and retracting end 7 of the lock pin 72 is temporarily inserted.
2A will fit into the connecting hole 5, it will be extremely easy and secure to insert the scaffold board 50 or the handrail frame 60.
can be mounted, and its separation and disassembly can be done via the connecting hole 5 of the lock pin 72 via the operating rod 73.
It is sufficient if the engagement and disengagement operation is performed from

In addition, 80 prevents the scaffold itself from swinging or falling by coming into contact with the wall of the long base frame 20, short base frame 30, and standard frame 40 assembled on the jack base 10 in the staircase or atrium. It is a steady rest metal fitting for. This steady rest metal fitting 80
As shown in FIG. 11, at both ends of the support member 81, which has the same cross-section as the support member 21, there are protectors made of rubber or a soft elastic material similar to rubber, in order to protect the wall surface that is brought into contact with the support member 81. A circular abutting plate 82 to which a plate 83 is attached is fixed, and a supporting member 81
A fixing screw 85 is screwed in from the outside of the upper wall of a fixing piece 84 with a substantially groove-shaped cross section that spans the top wall of the fixing piece 84, and a fixing screw 85 is provided at the tip of the fixing screw 85 to press against the support member 81 surface. , the fixing piece 84 is mounted on the back side of the upper wall of the mounting piece 87, which has a substantially groove-shaped cross section and is straddled by the support member 21 in the long base frame 20, the support member 31 in the short base frame 30, and the support member 41 in the standard frame 40. This mounting piece 8 is fixed between the left and right leg wall ends of the
A mounting screw 88 is screwed in from the outside of one of the left and right leg walls of 7 so that it can move forward and backward, and a plate 89 is provided at the tip of the mounting screw 88 to press against the support material 21, 31, 41 surface. be. In addition, the plate 86,
89 is rotatably provided at the tip of the fixing screw 85 or the mounting screw 88 in a substantially cup shape, and is attached to the support member 81 or the strut members 21, 3.
The fixing screw 85 or the mounting screw 88 can be rotated smoothly and easily even when pressed against the 1 and 41 surfaces, and the other of the left and right leg walls of the mounting piece 87 is connected to the support material 21, 31, 41. The abutting plate 82 is fixed to the supporting member 81 by forming the abutting plate 82 on the outer surface and bending it into a F-shape so as to abut the support member 81.
It has the same structure as the one used for charging and fixing.

The use of this steady rest metal fitting 80 is based on the support material 21,
31 or 41 using the mounting piece 87 by tightening the mounting screw 88 at an appropriate position in the vertical direction. is brought into contact with the wall surface, and the fixing screw 85 is screwed in and pressed against the supporting member 81 surface.

Figures 12 and 13 show, for example, a large staircase,
The figure shows a state in which the scaffolds are connected to each other in the left and right direction in order to create a wide work surface when working in a large space such as an atrium. The connecting fittings 90 used when forming such a connecting form are the support members 2 of the long base frames 20 adjacent to each other in the left and right direction.
1. A straddling piece 9 with a generally groove-shaped cross section that straddles the struts 31 in the short base frame 30 and the struts 41 in the standard frame 40 when they are arranged adjacent to each other.
A pair of left and right rotation holes 92 are formed in the upper wall of the spanning piece 91 at positions corresponding to the engagement recesses 2 in the support members 21, 31, and 41, respectively. A handle 93 that can be rotated is inserted, and the shaft end of the handle 93 has a width that is not larger than the internal width of the engagement recess 2 and larger than the gap between the engagement edges 3, An engaging protrusion 94 having a longitudinal width smaller than the gap between the engaging edges 3 is provided in a protruding manner, and when the engaging protrusion 94 is engaged into the engaging recess 2, the handle 93 is held tightly. A pull regulating protrusion 95 is attached to the back surface of the upper wall of the straddling piece 91. The engaging protrusion 94 is cut into an arc shape so that the corner in the rotation direction smoothly slides into contact with the inner surface of the side part of the engaging recess 2, and
In order to visually confirm whether or not the coupling fitting 90 is engaged from the outside and to ensure safety, the engagement protrusion 9
4 are arranged orthogonally to each other so that they engage in the engagement recess 2. Furthermore, the end of the pull regulating protrusion 95 resists the pull resistance when the gripping operation portion of the handle 93 itself is placed on the pull regulating protrusion 95 and the engagement protrusion 94 engages with the engagement recess 2. It is formed into a sloping surface that gradually becomes higher from the end toward the center so that it can be climbed on.

This connecting fitting 90 is used by straddling the adjacent struts 21, 31, and 41 with the straddle flats 91 with the handles 93 facing sideways, and then inserting the engaging protrusions 94 into the engaging recesses. 2 and then rotate the handle 93 downward 90 degrees to engage the engagement protrusion 94 with the inner edge of the engagement edge 3 within the engagement surface 1.

This invention uses the above-mentioned components selected and combined, and the jack base 10,
Long base frame 20, short base frame 30, standard frame 40,
The scaffolding board 50, the handrail frame 60, the steady rest metal fittings 80, and the connecting metal fittings 90 are selectively combined. In other words, in a staircase room, the jack bases 10 are installed at front and back intervals corresponding to the difference in level, and in correspondence with straight stairs, J-shaped stairs, U-shaped stairs, L-shaped stairs, etc.
Connect the long base frame 20 and the short base frame 30 on top,
Further, the standard frames 40 are stacked upward and connected to form the scaffolding board 5.
0. By mounting the handrail frame 60, the standard frame 40 can be mounted on the jack base 10 in the atrium.
By connecting the scaffolding boards 50 and handrail frames 60, and then installing the long braces 35 and short braces 45 as necessary, a work surface at a predetermined height is constructed. In order to prevent the device from swinging, it is supported on a wall via a steady rest metal fitting 80, and if necessary, it is arranged adjacently via a connecting metal fitting 90 to enlarge the work surface.

[Effect of the invention] Therefore, according to this invention, the long base frames 20 with different heights corresponding to the steps in the staircase interior,
By connecting the short base frame 30 to the jack base 10 with screws, it can be used as a base part to ensure a horizontal work surface, and then a standard frame having a support member 41 of a predetermined standardized length can be used. A predetermined height can be obtained by connecting the frame 40 to the long base frame 20 and the short base frame 30 and stacking them.
By connecting them on top of each other and stacking them, a predetermined height can be obtained.

At that time, place the long base frame 2 on the jack base 10.
0. By connecting the short base frame 30 and the standard frame 40, it is not only possible to finely adjust the height, but also to adjust the work installation surface such as the riser surface in a stairwell or the floor surface in an atrium. It will not cause any damage.

The scaffold board 50 installed between the horizontal beams 22, 32, and 42 located in the front and back direction of the stacked and assembled long base frame 20, short base frame 30, and standard frame 40 is made of horizontal beams. A plurality of mounting rods 52 mounted on the left and right sides are installed between 22, 32, and 42, and a door portion 55 is installed on either the front or rear.
By swinging it upward so that it can be opened and closed, not only can the structure be made lightweight, but also when stacking it upward, assembling it, and when going up and down the scaffold, it can be done inside the scaffold by opening and closing the door part 55. It is possible,
For example, even if it is installed in a narrow staircase, workers can go up and down it extremely easily.

Long base frame 20, short base frame 30, standard frame 40
The steady rest fitting 80 that grips and supports the support columns 21, 31, 41 in contact with a predetermined wall surface is stacked,
This prevents the entire assembly from swinging, and also prevents the scaffold itself from collapsing, and furthermore, from damage caused by each member contacting the wall surface.

On the other hand, the handrail frame 60 installed between each of the support members 21, 31, and 41 in the long base frame 20, short base frame 30, and standard frame 40 is particularly arranged at the top, so that it can prevent workers from falling. This prevents accidents and ensures work safety.

Moreover, at both ends of the scaffolding board 50 and the handrail frame 60, the long base frame 20, the short base frame 30,
By employing an elastic locking mechanism 67 in the engaging portion 65 that engages with each of the horizontal beams 22, 32, and 42 in the standard frame 40, stacking, assembly, and even disassembly can be performed by one person. The locking means also prevents the scaffolding board 50 and handrail frame 60 from lifting up, further improving workability and safety.

In addition, each support material 21, 31, 4 of the long base frame 20, short base frame 30, and standard frame 40 that are arranged adjacent to each other
By providing a connecting fitting 90 that engages and connects to the engagement recess 2 with the engagement edge 3 recessed in either the front or rear side wall of the 1, it is possible to use a large work surface in a wide space such as an atrium. Of course, the connecting fittings 90 may not be used in the case of a single row configuration.

As explained above, according to this invention, each component such as the jack base, long base frame, short base frame, standard frame, scaffolding board, handrail frame, steady rest metal fittings, and connecting metal fittings can be selectively combined with each other. staircase room,
It is possible to obtain a work surface of a predetermined height in the atrium, and it can be easily stacked, assembled, and dismantled by a single worker, and is easy to handle because it is lightweight. It has excellent workability and has excellent practical effects such as safety.

[Brief explanation of drawings]

The drawings show an embodiment of this invention; Fig. 1 is a perspective view showing an example of assembly and use; Fig. 2 is a perspective view showing the assembly of a long base frame and a short base frame;
Figure 3 is an exploded perspective view showing the connection between the jack base and the long base frame or short base frame, Figure 4 is a perspective view showing the assembly of the standard frame, Figure 5 is a perspective view of the gravity lock, and Figure 6 is the support column. Fig. 7 is a partially cutaway perspective view of the scaffolding board, Fig. 8 is its sectional view, Fig. 9 is a partially omitted perspective view of the handrail frame, Fig. 10 The figure is a partially cutaway perspective view of the locking mechanism, Figure 11 is a partially cutaway plan view with a part of the steady rest fitting omitted, and Figure 12 is the connection configuration when used as a work scaffold in an atrium, etc. FIG. 13 is a partially cutaway perspective view of a connecting fitting used in that case. 1... Engagement surface, 2... Engagement recess, 3... Engagement edge, 4... Fixing groove, 5... Connection hole, 6... Fixing screw, 10... Jacket base, 11... Bolt body , 12...Base board, 13...Protection plate, 15...
...Jacket nut, 16...Charging connection piece, 17...
... Support piece, 18 ... Nut body, 20 ... Long base frame, 21 ... Support material, 22 ... Side beam material, 25 ...
Gravity lock, 26... Base plate, 27...
Fixing pin, 28...Lock piece, 30...Short base frame, 31...Strut material, 32...Horizontal material, 35...
Long brace, 36...fitting hole, 40...standard frame,
41... Support material, 42... Horizontal beam material, 45... Short brace, 46... Fitting hole, 48... Joint pipe, 49... Retention prevention pin, 50... Scaffolding board, 5
1... side rod, 52... mounting rod, 53... anti-slip,
55... Door part, 56... Hinge, 57... Base door frame material, 58... Stopper, 59... Door frame material, 60
... Handrail frame, 61 ... Horizontal rod, 65 ... Engagement part,
66...Hook piece, 67...Lock mechanism, 68...
... Lock body, 69 ... Pin fixing piece, 70 ... Pin insertion hole, 71 ... Pin retraction hole, 72 ... Lock pin, 72A ... Retraction end, 73 ... Operation rod, 74
...Spring, 75...Sliding guide notch, 80...
... steady rest metal fitting, 81 ... support material, 82 ... abutting plate, 83 ... protection plate, 84 ... fixing piece, 85 ...
Fixing screw, 86...Plate, 87...Mounting piece, 88
...Mounting screw, 89...Plate, 90...Connecting metal fittings, 91...Spanning piece, 92...Rotation hole, 93...
Handle, 94... Engaging protrusion, 95... Pulling regulating protrusion.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A long base frame and a short base frame, each consisting of a suitable number of horizontal beams placed horizontally between support beams connected to each other on a jack base and arranged facing each other on the left and right sides;
A standard consisting of an appropriate number of horizontal beams placed horizontally between the pillars connected to the jack base, long base frame, and short base frame and arranged facing each other on the left and right sides with a predetermined standardized length. a frame, and the long base frame;
A scaffold board installed between the horizontal beams of the short base frame and the standard frame, a handrail frame installed between the horizontal beams of the long base frame, short base frame, and standard frame, and a handrail frame installed between the horizontal beams of the long base frame, short base frame, and standard frame; A locking mechanism for the scaffolding board and handrail frame that engages with the horizontal beams of the base frame, short base frame, and standard frame, and a locking mechanism for the scaffolding board and handrail frame that engages with each of the horizontal beams of the base frame, short base frame, and standard frame, and a predetermined wall surface by gripping the support materials of the long base frame, short base frame, and standard frame. A steady rest metal fitting that is brought into contact with and supported by an engagement recess with an engagement edge provided in one of the front and rear side walls of each support member of the long base frame, short base frame, and standard frame arranged adjacently. It is equipped with a connecting metal fitting that joins and connects,
These jack bases, long base frames, short base frames, standard frames, scaffolding boards, handrail frames, steady rest metal fittings,
Scaffolding for staircases and stairwells, characterized in that a work surface of a predetermined height in the stairwell and stairwell can be constructed by selectively combining connecting fittings with each other. 2. The locking mechanism is provided with engaging parts that are engaged with the crossbars at both front and rear ends of the scaffolding board and handrail frame, and these engaging parts are elastically connected to connecting holes drilled in the crossbars. The lock pin, which slides in and out, is moved back when engaging the crosspiece from above, inserted forward into the connection hole at the connection hole position, and can be moved back and removed from the connection hole using the operating rod attached to the lock pin itself. The staircase described in paragraph 1 of the claims for utility model registration
Scaffolding for the atrium. 3. The steady rest fitting has abutment plates fixed to both ends of the support material to abut against the wall surface, and the fixing screw can be moved forward and backward from the outside of the upper wall of the fixed piece with a generally groove-shaped cross section that straddles the support material. At the tip of this fixing screw, there is a plate that presses against the support material surface, and on the other hand, there is a groove of approximately cross section that straddles the support material in the long base frame, the support material in the short base frame, and the support material in the standard frame. A shaped mounting piece is fixed on the back of the upper wall between the left and right leg wall ends of the fixing piece, and a mounting screw is screwed in from the outside of either the left or right leg wall of this mounting piece so that it can move forward and backward. The staircase according to claim 1 or 2 of the utility model registration claim, wherein the tip of the screw is provided with a stop plate that presses against the support material surface.
Scaffolding for the atrium.