JPS6214269Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Industrial application field) This invention relates to scaffolding boards, which can be used at construction sites by attaching safe scaffolding boards to all places where scaffolding boards are required. This invention relates to a retractable scaffolding board designed to ensure work safety.

(Prior art) Usually, this type of scaffolding board has its length, width, etc.
The material or strength is standardized based on certain safety standards, and the required number of identical standardized steel scaffolding boards are used by sequentially erecting them on supporting rods. .

However, because there are many scaffolding boards mass-produced to the same standard on the market, depending on the construction site, the length of the scaffolding board may be slightly short or too long compared to the length of the required scaffolding. There may be cases where

Conventionally, a pair of tread plates was formed by bending both side edges of a thin steel plate into a channel shape, and the length of the tread plates was adjusted telescopically by slidably fitting the small-diameter channel into the large-diameter channel. A scaffold board has been proposed in which the length is fixed by inserting locking bolts into the sides of the joined channels (Japanese Utility Model Publication No. 51-160934).

(Problem to be solved by the invention) However, in a scaffolding board in which channel portions provided on both sides of a thin steel plate are slidably fitted, the channel portions are easily deformed, and the fitting and sliding of the channel portions are likely to occur. There was a risk that the bolts that fix the length of the tread may become unusable.

This is because the load applied to the top surface of the scaffolding board is concentrated on the channel part that fits in the longitudinal center of the scaffold, and when the load is applied to the channel part, the small diameter part of the fitted channel part that fits inside This is because the tip of the channel portion acts to expand the large diameter channel portion. Moreover, this expansion effect tends to become stronger as the scaffolding board is extended longer and the fitting area of the channel portion is reduced.

Therefore, this invention was devised to solve the above-mentioned problems, and prevents deformation of the sliding part that adjusts the length of the scaffold board due to the load applied to the top surface of the scaffold board. To provide a scaffold board capable of reliably and quickly fixing the scaffold length.

[Structure of the invention] (Means for solving the problem) In order to achieve the above-mentioned purpose, this invention consists of a scaffold main body having groove-shaped rails on both longitudinal edges of the plate, and a superimposed structure on the lower surface of the scaffold main body. In a work scaffold board whose length can be adjusted freely, it consists of a slide body that has slide protrusions on both longitudinal edges of the slide body that fit into the rail and slide, and the scaffold is mainly composed of fixed protrusions that run parallel to the rail. A pair of locking protrusions are provided on the slide body, which protrude from the center of the lower surface, face each slide protrusion, and slide into sliding contact with the sides of the fixed protrusion, and the locking protrusions protrude from the lower surface of the scaffold main body. A means to solve the problem is to provide a fixing plate that locks the lower end of the locking protrusion at the lower end of the tool, tighten this fixing plate against the scaffold body, and press and fix the slide body and the scaffold body. .

(Function) According to this invention, the load applied to the upper surface of the work scaffolding plate is applied to the fitting portion between the rail of the main body of the scaffold and the slide protrusion of the slide body, and the locking protrusion of the slide body to the main body. They are each distributed on a fixed plate that is crimped and fixed. The fixed protrusions and rails strengthen the structure of the scaffold, and the slide protrusions and the locking protrusions strengthen the structure of the slide body. Furthermore, the fixing plate that tightens and press-fixes the slide body and the scaffold main body together with the scaffold main body prevents deformation of the fitting portion between the rail and the slide protrusion.

(Example) Hereinafter, an example of this invention will be described in detail based on the drawings.

In the figure, 1 is a main body of scaffolding, and this main body of scaffolding 1 has a cross section on the inner center line of a steel plate having a substantially C-shaped cross section, with grooves 3 formed by bending both edges in the longitudinal direction so as to hang down to the back surface 2. A pair of side plates 4 having a shape that is the same as the rail 3 at both ends and with a part of the overall length cut out are arranged in a row so as to face each other, and two bolts 5 are installed at appropriate intervals between the side plates near the notch shape. A fixing protrusion 6 is provided, and a substantially rectangular parallelepiped steel lid body 7 is fitted and fixed on the open surface on the opposite side of the fixing protrusion 6 perpendicular to the longitudinal direction.
In addition, two hooks 8 to the frame material for the support frame are provided in a row at predetermined locations on the outer surface of the lid body 7.

As shown in FIG. 2, the bolts 5 are directly welded to the fixing ridges 6 on the back surface 2 without passing through the front surface 9 of the scaffold main body 1. By doing this, for example,
If an insertion hole is provided in advance and the bolt is inserted through the surface 9 each time it is used, the head of the bolt 5 may protrude from the surface 9 and become an obstacle when walking, or the nut 10 may be stepped on during use. It is possible to effectively prevent tightening from loosening.

A slide body 11 is combined with such a scaffold main body 1, and this slide body 1
1 has rails 3 and side plates 4 of the scaffold main body 1 on both long edges.
Two steel plates having a substantially square C-shaped cross section with a slide protrusion 12 and a locking protrusion 17 formed to slide on the inner wall of the steel plate are arranged in parallel with a slight gap,
One of the open surfaces perpendicular to the longitudinal direction of these pieces is integrally formed by fitting and fixing a substantially rectangular lid body 13 onto the outside, and furthermore, two hooks 14 for supporting rods are provided on the outer surface of the lid body 13. and is charged into the scaffold main body 1 from the other open end perpendicular to the longitudinal direction,
It is designed to be able to slide freely within the scaffold main body 1.

The fixing plate 15 that fixes the scaffold main body 1 and the slide body 11 locks the lower end of the locking protrusion 17 of the slide body 11 inserted into the scaffold main body 1, thereby fixing the scaffold main body 1 and the slide body 11. It is a rectangular plate made of steel with rising pieces connected at both ends for crimping, and is secured to the lower end of the fastening device protruding from the lower surface of the scaffold main body 1. The bolt 5 is inserted through and the nut 10 is tightened to attach it to the scaffold main body 1.

Regarding the structure of the scaffold main body 1 and the fixed plate 15, the side plate 4 is not provided, the fixed plate 15 is made the same length as the scaffold main body 1, and the number of bolts 5 fixed to the scaffold main body 1 is increased to form a slide body. It is also possible to press the entire slide protrusion 12 at the center of 11. However, since the slide body 11 is normally used in an extended state, it is better to use only about half of the side plate 4 as the fixed protrusion 6 as shown in the figure to simplify the assembly work. Of course, the slide body 11 is held safely and robustly by the fixing plate 15 and the side plate 4.
Since it is fixed, there are no safety issues.

Next, this explains the use of this invention:
After adjusting the overall length of the slide body 11 slidably inserted into the scaffold main body 1 according to the length of the scaffold required at a construction site, etc., a fixing plate with bolts 5 inserted is formed. 15, attach the central slide protrusion 12, then tighten it with the nut 10 to fix it to the scaffold main body 1, and attach the hooks 8, 1.
4, it is used by being installed on a rod for a support frame.

[Structure of the invention] This invention achieves its original purpose by being constructed as described above.

That is, the scaffold main body 1 has groove-shaped rails 3 on both longitudinal sides of the plate, and the slide protrusions 12 that overlap the lower surface of the scaffold main body 1 and fit into the rails 3 and slide are formed on both longitudinal sides of the scaffold main body 1. Slide body 1 on the edge
1, in which a fixed protrusion 6 running parallel to the rail 3 is protruded from the center of the lower surface of the scaffold main body 1, facing each sliding protrusion 12, and A pair of locking protrusions 17 that slide on the side surfaces of the fixed protrusion 6 are provided on the slide body 11, and a pair of locking protrusions 17 are provided on the lower end of the fastening device protruding from the lower side of the scaffold main body 1.
A fixing plate 15 is provided to lock the lower end of the scaffolding plate 7, and by tightening the fixing plate 15 against the scaffold main body 1 and crimping and fixing the slide body 11 and the scaffold main body 1, it is possible to attach the fixing plate 15 to the upper surface of this invented scaffold board. The load is distributed to the fitting portion between the rail 3 and the slide protrusion 12, and to the fixing plate 15 of the fastening device that presses and fixes the scaffold main body 1 and the slide body 11. Therefore, the load does not need to be concentrated on a limited portion, and deformation of the slide connecting portion between the scaffold main body 1 and the slide body 11 is prevented.

Also, a fixing plate 1 that locks the lower end of the locking protrusion 17 to the lower end of the fastener protruding from the lower surface of the scaffold main body 1
5 is provided, and this fixing plate 15 is tightened around the scaffold main body 1 to press and fix the slide body 11 and the scaffold main body 1, so that the overlapping portion of the scaffold main body 1 and the slide body 11 is tightly fixed. As a result, the load applied to the end of the fixed protrusion 6 fitted into the rail 3 is significantly reduced compared to the conventional one, so the risk of the rail 3 being expanded by the fixed protrusion 6 is eliminated. did.

Furthermore, the fixed protrusions 6 provided on the scaffold main body 1 strengthen the strength of the scaffold main body 1 itself, and the slide body 11
Since the slide protrusions 12 provided on the slide body 11 can strengthen the strength of the slide body 11 itself, the strength of the entire scaffold board of this invention is extremely strong. Even if the overlapping area decreases, deformation of each part of the scaffolding board can be prevented, allowing safe work.

As described above, this invention prevents deformation of the sliding part that adjusts the length of the scaffold board due to the load applied to the top surface of the scaffold board, and also allows the work of fixing the scaffold length to be performed reliably and quickly. It has various useful effects in practice.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
2 is an exploded perspective view, FIG. 2 is a plan view, FIG. 3 is a side view, and FIG. 4 is a cross-sectional view taken along the line - in FIG. 2. 1...Scaffolding main body, 2...Back side, 3...Rail, 4
... Side plate, 5 ... Bolt, 6 ... Fixed protrusion, 7,
13... Lid body, 8, 14... Hook, 9... Surface, 10... Nut, 11... Slide body, 12
...Sliding protrusion, 15...Fixing plate, 16...Mounting hole, 17...Locking protrusion.

Claims (1)

[Scope of utility model registration request] A scaffold main body having groove-shaped rails on both longitudinal edges of the plate body, and a slide body having slide protrusions on both longitudinal edges thereof that overlap the lower surface of the scaffold main body and fit into the rails and slide. In this work scaffold board, the length of which can be adjusted freely, fixed protrusions extending parallel to the rails are provided protruding from the center of the lower surface of the main body of the scaffold, facing each slide protrusion, and sliding on the side of the fixed protrusion. A pair of locking protrusions that touch each other are provided on the slide body, and a fixing plate that locks the lower end of the locking protrusions is provided on the lower end of the fastener protruding from the lower side of the scaffold main body. A scaffolding board characterized in that a sliding body and a scaffolding main body are crimped and fixed by tightening.