JP2021167532A - Ledger frame with floor - Google Patents

Abstract

To provide a ledger frame with a floor eliminating a gap formed between a horizontal member and a beam member and capable of suppressing the falling-down deformation without providing a new reinforcement member even when an unexpected impact load is applied to a gripping metal fitting.SOLUTION: A ledger frame with a floor comprises a floor plate member 1, a cloth member 2, a beam member 3, and a gripping metal fitting. The beam member 3 comprises: an upper side flange 3a whose rear end portion is fixed to the floor plate member 1 and whose tip portion extends toward the outside of the floor plate member 1; a lower side flange 3b fixed to a terminal flange portion 1b of a leg portion 1a provided in the floor plate member 1; and a web 3c having a Y-shaped cross section connected respectively with at least two places of the upper side flange 3a and a tip portion of the lower side flange 3b.SELECTED DRAWING: Figure 7

Description

The present invention relates to a floored cloth used to form a passage or a work floor of a temporary scaffold constructed at a construction site or the like.

As a floored cloth frame used for forming a passage or a work floor for temporary scaffolding at a construction site or the like, as seen in Patent Document 1, a floorboard material, a cloth material, and both ends of the floorboard material are used. A beam material to be attached and a gripping metal fitting fixed to the beam material or cloth material and projecting outward from the four corners of the floor board material in the longitudinal direction are used.

In such a cloth frame with a floor, the grip metal fitting is hooked on the horizontal member provided on the support column to hold the floor material in a horizontal posture to form a passage or a work floor. Since it protrudes from both ends in the length direction, when the gripping metal fitting is hooked on the horizontal member, a gap is formed between the horizontal member and the beam as much as the gripping metal fitting. It cannot be said that consideration has been given to safety because tools and the like may be accidentally dropped from the gap or tripped when walking.

As a prior art for solving the above-mentioned problems, Patent Document 2 proposes a scaffolding board having a structure in which the upper part of the beam material is extended toward the outside of the floor material portion. By the way, the cloth frame with a floor proposed in Patent Document 2 is deformed by falling down (deformation due to an impact load such as dropping) of the gripping metal fitting in the gap for inserting the gripping metal fitting of another scaffolding plate arranged adjacently. ) Is constructed by incorporating a reinforcing member separately, and as the number of parts increases, a new process for assembling it has to be added, and efficient production of flooring cloth is performed. However, it is difficult and the cost increase is unavoidable.

Jitsukaisho 60-1840 Gazette Japanese Patent No. 5374178

An object of the present invention is that it is possible to eliminate the gap formed between the horizontal member and the beam, and even if an unexpected impact load is applied to the gripping metal fitting, a new reinforcing member is provided. We are proposing a cloth frame with a floor that can suppress the collapse deformation without it.

In the present invention, a floor board material in which a partition area surrounded by a pair of short edge portions and a pair of long edge portions is used as a walking path or a work surface, and a floor board material on the long side edge portion of the floor board material over the entire length thereof, respectively. A pair of cloth materials that are suspended and held, a pair of beam materials that are connected to the short edges of the floor board material, and the floor board material that is attached to the cloth material at four corners of the floor board material and hooked on a horizontal member to hook the floor board material. A floored cloth frame provided with the cloth material, the beam material, and a gripping metal fitting that holds the material in a horizontal position.
The rear end of the beam is fixed to the floor plate material, and the tip portion is fixed to the upper flange portion extending outward of the floor plate material and the end flange portion of the leg portion provided on the floor plate material. It consists of a web that has a Y-shaped cross section that is connected to at least two locations of the upper flange and the tip of the lower flange.
The web has an end face that is brought close to or in contact with the inner side wall portion of the grip fitting to suppress the tilting deformation of the grip fitting, and the upper flange and the web are attached to at least one end portion in the width direction. It is characterized by having a relief portion for removing the upper flange and a part of the web to form an insertion gap for another floored cloth grip fitting arranged adjacent to each other with the inner side wall portion of the grip fitting. It is a cloth flange with a floor.

In a cloth with a floor consisting of the above configuration
1) The upper flange is connected to a flange main body whose tip portion extends outward of the floor plate material and a fixed piece which is connected to the rear end portion of the flange main body and is fixedly held by being fitted to the lower surface of the floor plate material. The lower flange is fixedly held on the tip end portion connected to the web by forming a step having the same dimension as the length of the end flange portion of the leg portion and on the upper surface of the end flange portion of the leg portion. Having a bottom surface,
2) The upper flange is such that the flange body and the fixing piece are connected via a step.
3) The step has the same dimensions as the thickness of the floorboard material.
4) It is preferable that the fixing piece and the lower flange have slits provided in the floor plate material to allow passage of the legs, as a specific means for solving the problem.

According to the present invention, the tip of the upper flange of the beam material is extended toward the outside of the floor plate material, so that when the flooring cloth frame is attached to the horizontal material, the horizontal material is used. It is possible to eliminate the gap formed between the beam and the beam.

Further, according to the present invention, there is an insertion gap between the upper flange and a part of the web connected to the upper flange to insert the grip fitting of another floored cloth frame adjacent to the inner side wall portion of the grip fitting. By providing a relief portion to be formed and making the web of the beam material always close to or in contact with the inner side wall portion of the grip fitting, even if an impact load acts on the grip fitting, the impact load is applied to the web. Since it is received as a whole, it is possible to reliably avoid the tilting deformation of the gripping metal fitting without using an extra member such as a reinforcing member.

Further, according to the present invention, the rigidity of the beam material itself can be increased by forming the web connected to the lower flange and the upper flange so as to have a Y-shaped cross section.

Further, according to the present invention, the upper flange is rearward of the flange main body via a flange main body whose tip portion extends outward of the floor board material and a step having the same dimensions as the thickness of the floor board material. Since it is composed of a fixed piece that is connected to the end and is fixedly held by being fitted to the lower surface of the floor plate, even if a load is applied to the beam material and a moment is generated, the floor plate material is placed under the fixed piece. A force that pushes up from the side acts, and even if the beam material and the floor board material are joined at a joint (welded part) with a relatively short joint length, it should be divided at the joint. No significant shearing force is generated, and sufficient strength can be ensured.

Further, according to the present invention, each of the fixing piece and the lower flange is provided with slits provided in the floor plate material to allow the legs to pass through, so that the legs are supported by the fixing piece and the lower flange. This makes it possible to prevent the legs from inadvertently falling over.

FIG. 5 is an external perspective view schematically showing an embodiment of a cloth frame with a floor according to the present invention. It is a figure which showed the front of the cloth frame with a floor shown in FIG. It is a figure which showed the plane of the cloth frame with a floor shown in FIG. It is a figure which showed the bottom surface of the cloth frame with a floor shown in FIG. It is a figure which showed the side surface of the cloth frame with a floor shown in FIG. It is a figure which showed the AA cross section of FIG. It is an external perspective view which showed the disassembled state of the cloth frame with a floor shown in FIG. It is an external perspective view which showed the disassembled state of the cloth frame with a floor shown in FIG. (A) to (e) are enlarged views of the front surface, the flat surface, the right side surface, the left side surface, and the bottom surface of the beam. It is the figure which showed the back of the beam material enlarged. (A) and (b) are views which showed the use state of the cloth frame with a floor according to this invention with respect to a plane and a side surface. It is a figure which showed the other example of the beam material suitable for constructing the cloth frame with a floor according to this invention.

Hereinafter, the present invention will be described in more detail with reference to the drawings. The floor cloth according to the present invention can be made of a metal member such as steel, and when constructing a temporary scaffold, a plurality of floor cloths having the same structure are used. In addition, when manufacturing a cloth frame with a floor, from the viewpoint of improving manufacturing efficiency and reducing the weight, the floor board material and the beam material are made by extruding the material into a predetermined shape from aluminum or an aluminum alloy or the like. Can also be used.

FIG. 1 is an external perspective view schematically showing an embodiment of a floored cloth according to the present invention, and FIGS. 2 to 5 show the front surface, the flat surface, the bottom surface, and the floored cloth frame shown in FIG. It is the figure which showed the side surface respectively, FIG. 6 is a figure which showed the AA cross section of FIG. 3, and FIGS. It is an external perspective view which showed the disassembled state only a part of a beam material and a floor board material while removing a beam material. 9 (a) to 9 (e) are enlarged views of the front surface, the flat surface, the right side surface, the left side surface, and the bottom surface of the beam, and FIG. 10 is an enlarged view of the back surface of the beam. It is a figure shown.

Reference numeral 1 in FIGS. 1 to 10 is a floor board material having a section area surrounded by a pair of short edge portions A and B and a pair of long edge portions C and D as a walking path or a working surface. The floor plate material 1 has a plurality of leg portions 1a provided on the lower surface thereof at intervals along the width direction, and a terminal flange portion 1b is formed at the lower end thereof.

Further, reference numeral 2 is a pair of cloth materials which are vertically held on the long edge portions C and D of the floor plate material 1 over the entire length thereof. The upper end portion of the cloth material 2 is provided with an upper wall 2b having ribs 2a extending outward and protruding downward at the tip portion, and the lower end portion of the cloth material 2 is provided outward. A lower wall 2d having a rib 2c extending upward in parallel with the upper wall 2b and projecting upward is provided at the tip portion thereof.

Further, reference numeral 3 is a pair of beam members connected to the short edge portions A and B of the floorboard material 1 by joining means such as welding, and 4 is attached to the cloth material 2 at the four corners of the floorboard material 1 by bolts or the like and is temporarily installed. It is a gripping metal fitting that holds the floor plate material 1 in a horizontal posture together with the cloth material 2 and the beam material 3 by hooking it on a horizontal member (not shown) constituting the scaffold.

The beam 3 has an upper flange 3a whose rear end is fixed to the floor plate 1 by welding or the like and whose tip extends outward from the floor plate 1, and a leg portion 1a provided on the floor plate 1. It is composed of a lower flange 3b fixed to the end flange 1b by welding or the like, and a web 3c having a Y-shaped cross section that is integrally connected to at least two locations of the upper flange 3a and the tip of the lower flange 3b. The web 3c has an end surface 3c1 that prevents the grip metal fitting 4 from collapsing and deforming by approaching or contacting the inner wall portion of the grip metal fitting 4 with a hollow structure having a hollow portion M.

The upper flange 3a is connected to the flange main body 3a1 via a flange main body 3a1 whose tip portion extends outward from the floor plate material 1 and a step d1 having the same dimensions as the thickness of the floor plate material 1, and is connected to the floor plate material 1. A fixing piece 3a2 that fits and is fixed to the lower surface of 1 can be used.

For the flange body 3a, an inclined portion connected to the fixed piece 3a2 and a flat portion connected to the inclined portion and raised within a range of 1 to 5 mm above the upper surface of the fixed piece 3a2 are applied. According to this, it is possible to secure a space for installing the inclined reinforcing member (not shown) in the horizontal member located directly under the beam member 3.

Further, the lower flange 3b includes a tip portion connected to the web 3c via a step d2 having the same size as the thickness of the end flange portion 1b of the leg portion 1a provided on the floor plate material 1, and the end portion of the leg portion 1a. Those having a lower surface fixed and held by welding on the upper surface of the flange portion 1b are used.

Further, reference numeral 5 is a relief portion formed by removing a part of the upper flange 3a and the web 3c at the widthwise ends of the upper flange 3a and the web 3c. The relief portion 5 forms an insertion gap between the grip fitting 4 and the grip fitting of another floor-mounted cloth frame that is adjacent to each other.
The step d2 is not always necessary for the lower flange 3b.

Reference numeral 6 is a slit provided in the fixed piece 3a2 of the upper flange 3a, and reference numeral 7 is a slit provided in the lower flange 3b. The slits 6 and 7 are provided so that the leg portions 1a can pass through, and are formed by the number of the leg portions 1a. By providing the slits 6 and 7, the leg portion 1a can be supported by the fixing pieces 3a2 and the lower flange 3b above and below the leg portion 1a, and the leg portion 1a can be prevented from inadvertently falling over.

Further, reference numeral 8 is a rib-shaped protrusion provided on the lower wall 2d of the cloth material 2 and the lower surface of the end flange portion 1b. The protrusion 8 is provided in order to adjust the height when laminating the cloth frame with a floor and to prevent scratches on the smooth surface when the floor plate material 1 and the beam material 3 are extruded.

Further, reference numeral 9 is a welded joint portion (welded bead) formed to join the upper flange 3a and the floor plate material 1, and 10 is an end flange provided at the lower end of the lower flange 3b and the leg portion 1a. It is a joint portion (welded bead) formed by welding to join the portion 1b. The joint portions 9 and 10 may be provided at about 6 locations having a joint length of about 20 to 30 mm, more preferably about 15 to 20 mm, but the length and the number of joint portions can be appropriately changed. Yes, not limited to those shown.

In the cloth frame with a floor according to the present invention, since the tip portion 3a1 of the upper flange 3a constituting the beam member 3 extends outward from the floor plate material 1, as shown in FIGS. 11A and 11B. In addition, a large gap that causes a tool or the like to fall or trips during walking is not formed between the horizontal member S and the beam member 3.

Further, in the cloth frame with a floor according to the present invention, the end portion of the web 3c, particularly the lower web 3c1 in the width direction, is maintained in a state of being always close to or in contact with the inner side wall portion of the grip fittings 4a to 4d. Therefore, even if an unexpected impact load may be applied to the grip metal fittings 4a to 4d due to the fall of the cloth frame with a floor, the impact load will be received by the entire web 3 and will be applied to the inside of the web 3 itself. Falling deformation is suppressed. Therefore, it is not necessary to newly provide a reinforcing member or the like.

Since the beam 3 has a hollow structure in which a space M is formed between the upper flange 3a and the web 3c, it is possible to increase the rigidity of the beam 3 itself without increasing the weight. Since the fixing piece 3a2 of the upper flange 3a is fixed to the lower surface of the floor plate material 1 in addition to not being easily deformed, a load is applied to the tip of the beam material 3 and the moment is generated from that point. Even if it occurs, a force that pulls the beam material away from the floor plate material does not act on the joint portion with the floor plate material, and conversely, a force that pushes up the floor plate material 1 by the fixing piece 3a2 is applied. , Sufficient joint strength can be ensured without forming a joint portion having a long weld length.

In particular, in the case where the floor plate material 1 and the beam material 3 are made of aluminum, an aluminum alloy, or the like, it is inevitable to increase the welding length particularly when giving a desired joint strength to the joint portion. However, in the floored cloth according to the present invention, it is sufficient that the beam material 3 has enough strength to be fixed at a predetermined position of the floor plate material 1, thereby simplifying the welding work. Can be planned.

The flange main body 3a1 and the fixing piece 3a2 of the upper flange 3a are shown as an example in which they are connected via a step d1 having the same dimensions as the thickness of the floor plate material 1, but by providing the step d1, the beam material is provided. Since the joint portion between 3 and the floor plate material 1 is in a flush state, it is possible to flatten the joint portion, and there is an advantage that a portion that causes a stumbling is not formed.

As the beam material 3, a material as shown in FIG. 12 in which a plurality of ribs 11 are provided on the tread surface in order to enhance the anti-slip effect can also be applied.

According to the present invention, the gap formed between the horizontal member and the beam is eliminated, and even if an unexpected impact load is applied to the gripping metal fitting, the tilting deformation is prevented without providing a new reinforcing member. A lumber with a floor that can be suppressed can be provided.

Further, according to the present invention, it is possible to increase the rigidity of the beam material itself, and it is possible to secure sufficient strength between the beam material and the floor plate material without forming a joint portion having a long weld length. A floored cloth frame that can be joined can be provided.

1 Floor board 1a Leg 1b End flange 2 Cloth 2a Rib 2b Upper wall 2c Rib 2d Lower wall 3 Beam 3a Upper flange 3a1 Flange body 3a2 Fixing piece 3b Lower flange 3c Web 3c1 End face 4 Grab metal fitting 5 Relief part 6 Slit 7 Slit 8 Rib 9, 10 Joint 11 Rib A, B Short edge C, D Long edge

Claims (5)

The partition area surrounded by the pair of short edge portions and the pair of long edge portions is held by the floor plate material as a walking path or a work surface and the long edge portion of the floor plate material by hanging over the entire length. A pair of cloth materials, a pair of beam materials connected to the short edges of the floor board material, and the floor board material attached to the cloth material at four corners of the floor board material and hooked on the horizontal member to attach the floor board material to the cloth material. , A floored cloth frame equipped with a gripping metal fitting that holds the beam in a horizontal position together with the beam material.
The rear end of the beam is fixed to the floor plate material, and the tip portion is fixed to the upper flange portion extending outward of the floor plate material and the end flange portion of the leg portion provided on the floor plate material. It consists of a web that has a Y-shaped cross section that is connected to at least two locations of the upper flange and the tip of the lower flange.
The web has an end face that is brought close to or in contact with the inner side wall portion of the grip fitting to suppress the tilting deformation of the grip fitting.
The upper flange and the web are other scaffolding plates arranged adjacent to each other at at least one end in the width direction, with the upper flange and a part of the web removed, and the inner side wall portion of the grip fitting. A floored cloth flange characterized by having a relief portion forming an insertion gap for the gripping metal fitting. The upper flange is composed of a flange main body whose tip portion extends outward of the floor plate material and a fixing piece which is connected to the rear end portion of the flange main body and is fixedly held by being fitted to the lower surface of the floor plate material.
The lower flange has a tip portion that forms a step having a dimension equivalent to the thickness of the end flange portion of the leg portion and is connected to the web, and a lower surface that is fixedly held on the upper surface of the end flange portion of the leg portion. The floored cloth according to claim 1, wherein the cloth is provided with a floor. The floored cloth according to claim 2, wherein the upper flange is connected to the flange body via a step between the fixing piece. The floored cloth according to claim 3, wherein the step has a dimension equivalent to the thickness of the floorboard material. The floored cloth according to any one of claims 2 to 4, wherein the fixing piece and the lower flange have slits provided in the floor plate material to allow passage of the legs. ..

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