JPH0111870Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fabric frame with a floor, and more particularly to a fabric frame with a floor, which includes gripping metal fittings supported on a beam member and riveted to the fabric material.

As is well known, the cloth frame with a floor, which is used as a work board that also serves as a connection between scaffolding structures, covers floor material 1, cloth material 2, and both ends of the floor material, as shown in the plan view of Figure 1. It consists of a beam 3 and a pair of grips 4 which are fixed to the beam or to the fabric and project from both ends of the fabric frame in the length direction. In order to maintain safety at the place of use, the components of this product are restricted to meet the standards stipulated in the Industrial Safety and Health Act. Therefore, each component is made to meet strict strength tests prescribed by law.
In particular, grip fittings must withstand the load stipulated by law in the shear test of the main body and attachment part, so the material and shape of the grip must be able to withstand the load, and therefore safety must be ensured. Therefore, the individual members must also have sufficient dimensions and become heavy. Since cloth frames with floors are used by being passed between scaffolding sites, if they are used at high places, it would be desirable if they could be made even slightly lighter in handling. For this reason, a cloth board formed by integrating the cloth material 2 and the flooring material 1 shown in Figure 1 into a C shape is also used, but for the purpose of safety, the regulations for grip fittings currently only include the single-plate type and the box type. It has been shown as optimal and no standards have been established for others. For this reason, only these two types have been used as they are for cloth frames with floors.

The inventor considered a single plate type, but
It is equipped with a grip recess 6 extending forward from the mounting piece 5, and the mounting piece can be directly riveted to the cloth material 2 from the inside as shown in the following example, or the flooring material can be folded into a C shape. The holes 7, 7a of the multi-part 2, which were previously drilled on the inner surface of the abdomen (hereinafter referred to as the abdomen) corresponding to the bent cloth material, are aligned with the holes 8, 8a of the mounting piece, and then riveted to the fabric frame. Ru. As is self-evident, the single-plate type grip fitting holds the thick plate in the above shape, that is, the second
As shown in the figure, since it is a processed product, it has sufficient strength, but it is attached only to the cloth material or the corresponding portion of the cloth material with simple rivets, and is not supported by anything else, so it is not a cloth frame with a floor. During frequent use, the rivets may loosen and the grip may become loose. Furthermore, if the length of the attachment piece of the gripping metal fitting is increased as a means of securing the grip to the abdomen with sufficient force, the weight inevitably increases. The box type has a U-shaped gripping member with a gripping member projecting integrally from the back of the gripping member, and the U-shaped gripping portion is welded to the beam. Workpieces welded during machining have distortions left in the machined parts due to the heat applied during welding, and this distortion reduces reliability in terms of strength. Therefore, for items that are used at high places and where emphasis is placed on safety, rivet-finished grips are more reliable than welded ones, and therefore it is desirable to use rivet-finished grips. .

The present inventor researched the single-plate type grip and found that during use, stress is applied to the concave part of the grip that grips and connects buildings and to the attachment part of the metal, but the stress applied to the concave part is By changing the cross-sectional shape of the concave part, for example, it is known that even if the cross-sectional area is the same, the latter has a stronger stress resistance than the former. We considered selecting a small cross-sectional shape for the same stress resistance. On the other hand, although the mounting part of the metal fittings has conventionally been riveted exclusively to the cloth material 2 or the inner surface of the abdomen, we also considered whether it could be partially supported by beams as another method of support. . The cloth frame with a floor of the present invention was developed as a result of such studies, and the main point is that the grip fitting 14, which extends forward from the mounting piece 15 and has a grip recess 16, has a shallow rim 21 formed around the entire circumference of the metal fitting. The beam 13 has a groove-shaped cross section, and has notches 22 on each side at both ends of the beam 13 facing the folded abdomen 12 of the floor material 11, which corresponds to a cloth material, and the notches allow the beam to protrude at both ends. The portion 23 is fitted into the groove 24 of the grip, and the mounting piece of the grip has a structure in which the back surface of the groove and the inner surface of the abdomen are in contact with each other and the facing portions are riveted and tightly attached. Each member of the cloth frame of the present invention will be further explained and examples will be described in detail below.

The gripping fitting 14 is formed by shallowly drawing a thick plate to form a rim 21 around its entire circumference. The height of the rim is considerably lower than the width of the groove 24 formed by the metal fitting 14. Holes 18, 18a are drilled in the mounting piece 15 in correspondence with holes (not shown) previously drilled in the abdomen 12, and the respective holes of both are aligned and studs 25, 25 are drilled.
A is struck. Hole 1 between the mounting part and grip recess
Numerals 9 and 19a correspond to the holes 9 and 9a in FIG. 2, and are for mounting a clamp claw 20 corresponding to the clamp claw 10. The notches 22 provided on each side of both ends of the beam material 13 are 26 in the width direction and 27 in the length direction, so that the back of the groove 24 of the grip fitting is in contact with the inner surface of the abdomen 12 at the time of installation. When the width part 26 of the notch 22 is on the rim protruding surface, the length part 27 is on the inner surface of the rim, or the protruding ends 23 of the splicing material
are adjacent to the surfaces of the grooves 24, respectively, and the rectangular protrusions of the beams fit into the grooves.

The cloth frame with a floor of the present invention is an integrated frame abdomen 1 consisting of a C-shaped bent floor material 11 and an abdomen 12 equivalent to cloth material.
The groove back of the mounting piece 15 of the grip fitting 14 is arranged on the inner surface of the metal fitting 14, and the convexly protruding ends of the beams 13 arranged at both ends of the flooring material 11 are fitted into the grooves 24 of the metal fitting 14 to attach it to the abdomen. Fasten the studs 25 and 25a between the pieces to complete the assembly. Riveting in this case is not limited to the method of aligning the holes drilled in the mounting piece and the abdomen of the cloth material in advance, but can also be done by other methods such as the driving rivet method, which is done without drilling holes in both parts in advance. good. The beams and flooring materials are fixed using conventional techniques.

With this structure, the gripping metal is not only fixed to the abdomen by the rivets, but also the protruding end of the beam fits into the inner surface of the groove of the metal fitting. The length 27 of the cut 22 in the beam therefore comes into contact with the groove wall of the rim. When the grip recess 16 is hung over the building site and the cloth frame is hung between the buildings, if the grip fittings tend to bend relative to the cloth frame due to the load applied to the flooring material, both the grip fittings and the cloth frame In addition to the supporting force provided by the studs that fix the
By contacting the groove wall of the rim, the beam supports the grip 14 through its length. This can strengthen the supporting force of the gripping metal fittings against the cloth frame. Therefore, the same supporting force can be obtained by making the length of the mounting piece shorter than that of the conventional one. Furthermore, since the gripping metal fittings are made in the groove shape, even if the cross-sectional area is the same, the mechanical strength can be increased compared to the conventional gripping metal fittings having a rectangular cross section. Therefore, in order to maintain the same mechanical strength as before, a smaller cross-sectional area is sufficient.
Can be made lighter. Furthermore, since the plate thickness of the groove of the grip can be made thin during manufacturing, it is also possible to rivet the mounting piece and the abdomen 12 using the above-mentioned driving rivet method. This eliminates the need for alignment work when attaching rivets, increasing manufacturing efficiency. This makes it possible to reduce the weight of the grip fittings by approximately 1.5 kg or more even in a standard floor-mounted cloth frame, thereby increasing work efficiency at high places.

In this example, the floor material and cloth material are integrated, but the same method can be applied to a cloth frame with a floor where the floor material and cloth material are made separately and integrated using an appropriate joining method. can.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a conventional cloth frame with a floor, in which the upper half shows the floor material and the cloth material integrated together, and the lower half shows the floor material and the cloth material separated and fixed together. Second
Figure 3 is an elevational view of a conventional grip fitting, Figure 3 is an elevational view of the grip used in the present invention, showing the state in which it is attached to a cloth frame, Figure 4 is an end view of the grip fitting mounting piece, Fig. 5 is a sectional view taken along the line A-A in Fig. 3 and shows how the grip is attached, and Fig. 6 is a cross-sectional view taken along the line B-A in Fig. 3.
It is a view from arrow B. 11: Floor material, 12: Bent abdomen, 13: Beam material, 14: Grip fitting, 15: Mounting piece, 16: Grip recess, 21: Rim, 22: Notch, 23: Projecting end, 24: Groove.

Claims (1)

[Scope of utility model registration request] In a fabric frame with a floor integrally formed with a C-shaped cross section and provided with grip fittings extending from the fixed beams at both ends, the grip fittings 14 are provided with a grip recess 16 in a portion extending forward from the mounting piece 15. , the section of the beam 13 is formed into a shallow groove shape with a rim 21 formed around the entire periphery of the metal fitting, and cuts 22 are provided on each side at both ends of the beam 13 facing the bent abdomen 12 of the flooring 11. This cloth frame with a floor is provided with a grip fitting in which both protruding ends 23 of a beam are fitted into grooves 24 of the grip fitting, and the mounting piece is riveted with the back surface of the groove 24 facing the inner surface of the abdomen.