JP2949683B2 - Cross scaffolding of framework scaffold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross brace for improving work safety in a frame scaffold used in construction sites such as construction and civil engineering.

[0002]

2. Description of the Related Art In principle, an X-shaped cross brace for reinforcing and securing the safety of workers is attached to a frame scaffold. By the way, if the brace is merely X-shaped, when it is attached to the frame scaffold, a large triangular space is formed in the lower half, and therefore, when the worker slides his foot, There was a danger of falling from space and causing a serious accident.

As a conventional technique for solving such a problem, there is a "crossover strut" disclosed in JP-A-9-287282. In this method, receiving brackets slidable in the axial direction of the bracing members are attached to the lower halves of the two bracing members in the X-shaped crossing state, and the X-shaped crossing members are attached to these receiving brackets. The end portions of the protective bar are pivotally supported so as to be bridged between the lower halves of both bracing members in the state.

[0004] Accordingly, when the brace is attached to the vertical ground of the frame scaffold, a protection bar is disposed and fixed horizontally across the triangular space formed in the lower half. This eliminates the concern of a falling accident from the triangular space during work.

[0005]

The above-mentioned conventional "crossing strut" is capable of sliding a vertically long rectangular frame-shaped receiving bracket on each lower half of both strut members in an X-shaped crossing state. If the brace is kept vertical because it is only fitted to the brace, there is no problem because the vertical width of the receiving bracket is slightly smaller than the vertical width of the base end of the brace. Does not occur, but when the brace is tilted and its base end is located diagonally to the brace, there is a problem that the brace falls off from the brace. Become. Because the receiving bracket has a rectangular frame shape, the length of the diagonal portion is naturally longer than its vertical width, and the receiving bracket is required to smoothly slide the bracing material. , If you reduce the height of this too much,
This is because a certain amount of play is required to cause an inconsistency in the sliding.

As a device for solving the above-mentioned problem, there is an "apparatus for preventing fall and fall of a frame scaffold" described in Japanese Utility Model Laid-Open No. 7-38426. In this method, both ends of a protection bar which can be folded in two with respect to a bracing material are directly pivotally connected with pins or the like. However, with such a structure, it is necessary to process the bracing material itself for the pivotal connection, and it is necessary to purchase a brace with a protective bar built into the bracing from the beginning, or The bracing must be perforated for pin insertion.

[0007] As described above, when purchasing a product incorporating a protective bar, replacement of all braces, that is,
The economic burden of this is significant because the existing braces must be discarded. And when performing the above-mentioned processing on the braces on hand, the current worker is engaged only in simple construction work, and such processing cannot be performed by the worker himself. This had to involve a processor, which was also economically burdensome.

The present invention has been made to provide a novel cross scaffold for a scaffold which solves such a conventional problem.

[0009]

SUMMARY OF THE INVENTION According to the present invention, two bracing members 1 and 2 are pivotally connected at their central portions 1c so as to be in a state where they intersect in an X-shape and almost overlap in a straight line. In a brace which is configured to be inverted, a protection bar 3 in which slide fittings 4 and 4 having frame-shaped openings are fixed at both ends,
The slide fittings 4 and 4 are slidably attached to the brace members 1 and 2 by inserting the slide fittings 4 and 4 through the respective lower ends of the brace members 1 and 2.
The cross streaks of the frame scaffold are configured such that retaining metal fittings 5 are provided at both ends of the protection bar 3 for restricting the frame-shaped opening of the above to a size in which the pull-out of the bracing members 1 and 2 is prevented. It relates to paddy.

[0010] The diameter of the rod portions of the bracing members 1 and 2 is set to a dimension A, the maximum vertical width of the mounting flat enlarged portion 2a is set to a dimension B, and the frame-shaped opening in the slide fitting 4 is The dimension L that represents the longest distance between the upwardly directed arc edge 5d of the retaining piece 5c of the retaining metal 5 and the inner edge of the top horizontal rod 4c of the slide metal 4 is defined as a dimension L.
The configuration is such that the relationship of dimension A <dimension L <dimension B is maintained.

The present invention solves the above-mentioned conventional problems based on the adoption of the above configuration.

[0012]

FIG. 8 shows a brace according to the present invention in which the flat bulging portion 2a for mounting the brace material 2 is located vertically in the slide fitting 4 (see the second drawing from the right). Even in the case where the mounting flat bulge 2a is displaced to the diagonal position of the vertical groove of the slide fitting 4 (see the drawing shown on the rightmost side of FIG. 9), the above-described dimensions are always used. Since the relationship of A <dimension L <dimension B is maintained, it is possible to completely prevent the mounting flat bulge 2a from coming out of the vertical groove of the slide fitting 4.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a disassembled state of a brace according to the present invention, in which two brace members 1 and 2 are pivotally connected 1c in an X-shaped cross state. Things. Reference numerals 1a and 2a denote mounting flat bulges formed at both ends of the bracing members 1 and 2, in which mounting holes 1b and 2b are formed. The widths of the enlarged portions 1a and 2a are configured to be larger than the diameter of the rod portions of the bracing members 1 and 2. The dimensions are those set by the Ministry of Labor standards. And the bracing provided with such a configuration is an existing one.

According to the present invention, the protection bar is slidably attached to the existing bracing as described above.
It is designed to ensure work safety.

In FIG. 1, reference numeral 3 denotes a protection bar, and slide fittings 4 and 4 are fixed to both ends thereof. As shown in FIGS. 6 and 7, the slide fitting 4 includes fixed horizontal rods 4a, 4a and obliquely rising rods 4b, 4b.
And the top horizontal rod portion 4c are formed by bending a single metal round bar into a vertically long rectangular frame shape. Then, as shown in the figure, the slide fitting 4 is fixed to the both ends of the protection bar 3 by the fixed horizontal rods 4a, 4a.
It is fixed by welding etc. through the part.

Then, as shown in FIG. 1, the protection bar 3 is inserted into the lower ends of the brace members 1 and 2 by inserting the slide fittings 4 and 4 into the lower ends of the brace members 1 and 2, respectively. 2 is slidably mounted on the second.

Reference numeral 5 denotes a retaining metal fitting which prevents the sliding metal fittings 4, 4 from falling off the bracing members 1, 2 by closing the lower part of the frame-shaped openings of the sliding metal fittings 4, 4. It is to prevent. As shown in FIG. 1, the retaining metal fitting 5 is configured to be securely fixed to the protective bar 3 by driving a caulking rivet 6 using a caulking tool 7. .

FIG. 5 is a perspective view showing the retaining fitting 5, and FIG. 4 is an enlarged view showing a state in which the retaining fitting 5 is attached to the slide fitting 4. As shown in FIG. As shown in the figure, the retaining metal fitting 5 includes a mounting horizontal plate portion 5b having a rivet insertion hole 5a, and the slide metal fitting 4 described above.
And a retaining piece 5c which rises obliquely for a predetermined length in parallel with the inclined rising rod 4b.
The upper edge is formed so as to form an upward arc edge 5d having a predetermined arc dimension.

The brace according to the present invention is attached to a frame scaffold in a state of being opened in an X shape as shown in FIG. 2 in the same manner as a conventional brace. Accordingly, the protection bar 3 is erected on each lower half of the two bracing members in the X-shaped cross state. Therefore, a large triangular space formed in the lower half of the bracing is protected by the protective bar 3,
It is possible to prevent a situation in which an operator falls from the space.

When the brace is mounted on a frame scaffold with the above-mentioned protection bar 3 positioned above the brace (in a state in which the protection bar 3 is turned upside down), the protection bar 3 is held by a worker's hand. It will function as a slide.

When the brace according to the present invention is stored, as shown in FIG. 3, if the brace members 1 and 2 are closed, the protective bar 3 is slidably attached to the brace members 1 and 2. Therefore, the protective bar 5 is also parallelized with the bracing members 1 and 2,
The whole is folded into a shape like a single bar.

FIG. 9 is an explanatory drawing showing a conventional brace with a protective bar without a retaining metal fitting 5 as a gist of the present invention. In the figure, A is the dimension of the diameter of the rod portions of the bracing members 1 and 2, and B is the dimension of the maximum vertical width of the mounting flat bulging portions 1a and 2a. The size A of the diameter of the rod portions of the bracing members 1 and 2 is specified by the Ministry of Labor standards (in Japan, almost all pipes with an outer diameter of 21.7 and a wall thickness of 2.0 are used). And the mounting flat bulging part 1
The dimension B of the maximum vertical width of a and 2a is a constant dimension that is inevitably determined in crushing the pipe material forming the bracing members 1 and 2. Note that, in FIG.
The vertical dimension D of the opening is a substantial vertical groove dimension of the slide fitting which is necessarily determined by the dimension C and the inclination angle α of the slide fitting.

In FIG. 9, when the flattened portion 2a for mounting the bracing member 2 is positioned vertically in the slide fitting 4 (see the second drawing from the right), the flattened portion 2a for mounting is used. Since the maximum vertical width B is larger than the substantial dimension of the vertical dimension C of the opening of the slide fitting 4, that is, the substantial vertical groove D in consideration of the inclination angle of the slide fitting 4, the mounting flat enlarged portion 2a is There is no possibility of slipping out of the vertical groove of the slide fitting 4.

However, if the mounting flat portion 2a is displaced to the diagonal position of the vertical groove of the slide fitting 4 (see the drawing shown on the rightmost side of FIG. 9), the dimension F of the diagonal line is set. Since the enlarged flat portion 2a is larger than the maximum vertical width B of the enlarged flat portion 2a, the enlarged flat portion 2a for attachment comes off the slide fitting 4. In other words, the protection bar 3 is detached from the bracing members 1 and 2, causing a situation in which the protection bar 3 is lost when stored in a bar state.

FIG. 8 is an explanatory drawing showing the bracing according to the present invention. In the same figure, the dimension A indicates the dimension of the diameter of the rod portion of the bracing members 1 and 2, and the dimension B indicates the dimension of the maximum vertical width of the mounting flat enlarged portion 2a, as in the case of FIG. The dimension L is the size of the slide fitting 4.
, Which is the dimension that represents the longest distance between the upwardly curved arc edge 5d of the retaining piece 5c of the retaining metal fitting 5 and the inner edge of the top horizontal rod 4c of the sliding metal fitting 4. In other words, the dimension L indicates a substantial opening dimension of the slide fitting 4.

The point to be noted here is that the upper edge of the retaining piece 5c in the retaining metal fitting 5 is an upwardly curved arc edge 5d. Accordingly, even if the substantial opening dimension L of the slide fitting 4 is in the vertical direction of the opening (see the second drawing from the right in FIG. 8), its diagonal direction (FIG. 8)
Are the same distance. Therefore, the substantial opening dimension L is larger than the diameter A of the rod portions of the bracing members 1 and 2 and smaller than the maximum vertical width dimension B of the mounting flat bulging portion 2a (dimension A < The relationship of dimension L <dimension B) is maintained.

In order to satisfy the above conditions, the upwardly directed arc edge 5d formed on the upper edge of the retaining piece 5c of the retaining metal 5 is attached to the inner edge of the top horizontal rod 4c of the slide metal 4. Of the mounting flat bulging portion 2a when the flat bulging portion 2a moves along
It is important that the lower end of “a” be configured to have an arc edge that matches the arc locus drawn.

Based on the dimensional conditions as described above, the bracing according to the present invention, as shown in FIG.
Even in the case where the mounting flat bulging portion 2a of the bracing member 2 is positioned vertically (see the second drawing from the right),
Even if the mounting flat bulge 2a is displaced to the diagonal position of the vertical groove of the slide fitting 4 (see the drawing shown on the rightmost side of FIG. 8), the aforementioned dimension A <dimension L is always maintained.
<Because the relationship of dimension B is maintained, the flat enormous portion 2 for mounting
a can be completely prevented from slipping out of the vertical groove of the slide fitting 4.

[0029]

According to the present invention, a structure as described in claim 1 is provided.
That is, the two bracing members 1 and 2 are pivotally connected at their central portions 1c.
In this way, in a brace which is configured to convert to a state where it crosses in an X shape and substantially overlaps in a straight line, the slide fittings 4 and 4 having frame-shaped openings are fixed to both ends. The bar 3 is inserted through the slide fittings 4 and 4 at the lower ends of the bracing members 1 and 2 respectively.
Slidably attached to the bracing members 1 and 2,
The frame-shaped openings of the slide fittings 4 and 4 are
2 is provided at the use end of the protection bar 3 so as to restrict it to a size that prevents the pull-out of the two bracing members in the X-shaped crossing state. The protection bar 3 is erected in the half part, so that a large triangular space formed in the lower half of the bracing is protected by the protection bar 3 and when the worker falls from the space. Such a situation is prevented from occurring.

Further, since the present invention can be applied to an existing cross-brace, that is, it does not require any modification to the existing cross-brace (for example, mechanical processing and processing such as welding). ), The present invention can utilize the existing strut as it is, and therefore, the capital investment can be reduced.

In addition, according to the present invention, the protective bar 3 does not come off even if it is rotated about its axis by providing the retaining fitting. Therefore, when storing braces,
Based on the unexpected dropout of the protection bar 3 , there is no occurrence of a situation where the protection bar 3 is lost.

The present invention is characterized in that the slide fitting 4 is fixed to the horizontal rods 4a, 4a,
The inclined rising rods 4b, 4b and the top horizontal rod 4c
It has a vertically long rectangular frame shape formed by bending a single metal round bar, and is fixed to both ends of the protection bar 3 via fixing horizontal rods 4a, 4a. With such a configuration, the sliding of the slide fitting 4 with respect to the bracing members 1 and 2 is extremely smooth because the sliding fitting 4 is a round bar.

In the present invention, the retaining metal member 5 is parallel to the mounting horizontal plate portion 5b having the rivet insertion hole 5a and the inclined rising rod portion 4b of the slide metal member 4. And a retaining piece 5c that rises obliquely for a predetermined length, and the upward edge 5d is formed on the upper edge of the retaining piece 5c. Reference numeral 5 denotes a form that fits inside the slide fitting 4, so that the stopper fitting 5 protects against loosening and deformation due to some external pressure, and at the same time, prevents the slide fitting 4 from being crushed. The metal fitting 5 plays a role of helping this. In other words, since the slide fitting 4 and the retaining fitting 5 are located in a state of being superimposed on each other, their resistance to destructive deformation is achieved in a mutually supporting relationship.

According to the present invention, the retaining metal fitting 5 is fixed to the protection bar 3 by driving the caulking rivet 6 with the caulking tool 7. Thus, the practice of the present invention on existing bracing is extremely simple.
In other words, if it involves drilling work, welding work, cutting work, etc., the execution must involve the work of a specialized work company, but in the present invention, simple caulking work is sufficient. Therefore, it can be easily implemented in-house.

According to the present invention, the sliding member has a diameter A of the rod portions of the bracing members 1 and 2, a dimension B of a maximum vertical width of the flattened portion 2a for mounting, and a slide. The dimension representing the longest distance between the upwardly-facing arc edge 5d of the retaining piece 5c of the retaining metal 5 and the inner edge of the top horizontal rod 4c of the sliding metal fitting 4, which is a frame-shaped opening in the metal fitting 4. Dimension L, each dimension is dimension A <dimension L <
Since the protection bar 3 is configured so as to maintain the relationship of the dimension B, the protection bar 3 does not come off even when it is rotated around its axial center.

According to the present invention, the upward arc edge 5d of the retaining piece 5c of the retaining metal fitting 5 is attached along the inner edge of the top horizontal rod 4c of the sliding metal fitting 4. When it is moved in a state where the upper end of the flat bulging portion 2a is in contact with the upper end of the flat bulging portion 2a, it is configured to have an arc edge that matches the circular locus drawn by the lower end of the flat bulging portion 2a for mounting. The separation prevention in the case of rotation in the direction of the center can be achieved extremely reasonably and accurately.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cross bracing according to the present invention in an exploded state.

FIG. 2 is a perspective view of a cross brace according to the present invention in an X-shaped open state.

FIG. 3 is a perspective view of a cross bracing according to the present invention in a state of being closed in a single rod shape.

FIG. 4 is an enlarged front view of a main part of the present invention.

FIG. 5 is a perspective view showing a retaining metal fitting 5 as a gist of the present invention.

FIG. 6 is a front view showing the protection bar 3 according to the present invention.

FIG. 7 is a plan view showing a protection bar 3 according to the present invention.

FIG. 8 is an assembly drawing for explaining the bracing according to the present invention.

FIG. 9 is an explanatory drawing showing a conventional bracing.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMBERS 1 Brace material 1a Flat bulging part for mounting 1b Mounting hole 1c Pivot 2 Brace material 2a Flat bulging part for mounting 2b Mounting hole 3 Protection bar 4 Slide bracket 4a Fixed horizontal rod part 4b Sloping rising rod Part 4c Top horizontal rod 5 Detachment fitting 5a Rivet insertion hole 5b Mounting horizontal plate 5c Detachment piece 5d Upward arc edge 6 Swaging rivet 7 Swaging tool

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-13781 (JP, A) JP-A-5-52091 (JP, A) JP-A-9-228624 (JP, A) JP-A 9-208 72089 (JP, A) JP-A-5-214807 (JP, A) JP-A-6-67679 (JP, U) JP-A 7-32091 (JP, U) JP-A-4-90635 (JP, U) Hira 2-58546 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) E04G 1/26 E04G 7/22

Claims (6)

(57) [Claims] 1. A method in which two bracing members (1, 2) are pivotally connected at their central portions (1c) so as to be converted into a state of crossing in an X shape and a state of substantially linearly overlapping. In the constructed bracing, slide fittings (4,
By inserting the slide bars (4, 4) into the respective lower ends of the brace members (1, 2), the protection bars (3) having both ends secured to the respective brace members (1, 4) are provided. , 2), and for restricting the frame-shaped openings of the slide fittings (4, 4) to dimensions that prevent the bracing members (1, 2) from being pulled out. Attach the retaining bracket (5) to the protection bar (3).
Cross struts of a framework scaffold, which are provided at both ends of the frame. 2. A horizontal rod for fixing the slide fitting (4).
(4a, 4a), the obliquely rising rod (4b, 4b), and the top horizontal rod (4c) are formed by bending a single metal round bar to form a vertically long rectangular frame. , Protection bar (3)
2. The cross strut of a frame scaffold according to claim 1, wherein the cross struts are fixed to both end portions of the frame scaffold via fixing horizontal rod portions (4a, 4a). 3. A rivet insertion hole is formed by inserting a retaining metal fitting (5).
(5a) a mounting horizontal plate (5b), and a retaining piece (5c) that rises obliquely for a predetermined length in parallel with the slanting rising rod (4b) of the slide fitting (4). The cross strut of the frame scaffold according to claim 1 or 2, wherein the retaining piece (5c) has an upwardly arcuate edge (5d) at an upper edge thereof. 4. The retaining bracket (5) is configured to be fixed by driving a caulking rivet (6) into a protective bar (3) using a caulking tool (7). The cross bracing of the framework scaffold according to any one of claims 1 to 3. 5. The diameter of the rod portion of the bracing members (1, 2) is set to a dimension A.
The dimension of the maximum vertical width of the mounting flat bulging portion (2a) is defined as a dimension B, which is a frame-shaped opening in the slide fitting (4) and a retaining piece (5c) in the retaining fitting (5). ) Upward arc edge (5d) and top horizontal rod of slide fitting (4)
The dimension representing the longest distance between the inner edges of (4c) is defined as dimension L,
The cross strut of the frame scaffold according to any one of claims 1 to 4, wherein each dimension is configured so as to maintain a relationship of dimension A <dimension L <dimension B. 6. A retaining piece in a retaining metal fitting (5).
(5c) The upwardly extending arc edge (5d) is attached along the inner edge of the top horizontal rod portion (4c) of the slide fitting (4) to the flattened portion for mounting.
6. The configuration according to claim 3 or claim 5, wherein when the upper end of (2a) moves in a state of contact, an arc edge coincides with an arc-shaped locus drawn by a lower end of the flattened portion for mounting (2a). Cross braces for the described framework scaffold.