JP3965065B2 - Temporary element coupling bracket and temporary element coupling method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a technique for joining temporary elements when constructing a temporary structure such as a scaffold or a support.
[0002]
[Prior art]
Conventionally, a support fitting with an insertion hole is projected on the support column, and a hand clamp connected to the support column is provided with a wedge-type connection fitting that can be connected to the support fitting, so that a pipe clamp or the like is provided. A technique for simply connecting temporary elements without using them is known. In particular, the inventor of the present application has invented a wedge-type fitting having a pawl portion for temporary fixing (Japanese Patent Application No. 2001-223298). According to this, the joining operation can be performed by a small number of personnel. In addition, a handrail can be attached in advance.
[0003]
That is, the structure is such that a metal plate is bent into a hook shape and a downward claw portion that can be locked in the insertion hole of the metal fitting is formed, and a through hole formed in the upper surface portion of the main body. A wedge that can be inserted into the insertion hole is configured separately. In order to connect a handrail or the like to the support column using the connecting bracket, first, the claw portion is temporarily hooked on the insertion hole of the bracket, and then fixed by driving the wedge into the insertion hole. To do. Thus, according to the said coupling metal fitting, since it can carry out by one worker from the temporary fixation by a nail | claw part to the permanent fixation by a wedge, the staff concerning construction | assembly of a scaffold etc. can be reduced. In particular, when the connection fitting is applied to a handrail, the handrail is temporarily fixed by the claw portion from the floor one floor below the mounting floor, and then the wedge is driven up to the mounting floor. Can be attached in advance, so that the safety of workers is also ensured.
[0004]
[Problems to be solved by the invention]
However, the problem to be solved still remains in the above-described coupling metal fitting by the present inventor. The first is due to the fact that there is no standard for the size, shape, etc. of the metal fittings in the columns and the like. That is, there are currently several manufacturers of temporary elements, and therefore the shape and size of the metal fittings vary slightly from manufacturer to manufacturer. In particular, there is a difference in the degree of protrusion from the peripheral wall of the support post. On the other hand, in order to make a fitting that can be applied to any of the metal fittings, the distance between the claw portion and the back portion facing it can only be lengthened, and the main body can be deepened. For the insertion part with a small degree of protrusion, when the claw part is temporarily fixed, a considerable opening occurs in the back surface part and the receiving metal part, resulting in rattling. In order to avoid this inconvenience, it is only necessary to prepare several types of coupling fittings having different sizes, but the metal plate as the molding material has a thickness of 5 mm or more in order to ensure strength. It is disadvantageous in terms of cost to mold the cores so that the sizes of the cores are different. In addition, it takes time and effort for the user to select one coupling bracket from several types.
[0005]
As a second problem, this type of support is used many times and the wedge is driven in each time. However, the insertion hole of the metal fitting may be deformed by repeatedly driving the wedge in this way. . A deformed insertion hole is not preferable because the effect of the wedge is lost and the coupling fitting cannot be firmly fixed to the receiving fitting.
[0006]
The present invention has been made in view of the above-described problems, and an object of the present invention is to disclose a technique capable of obtaining a coupling fitting that can be applied to any receiving fitting with a slight change in configuration.
[0007]
[Means for Solving the Problems]
In order to achieve the above-described object, the present invention provides a separate temporary element such as a handrail to be coupled to a temporary element such as a column that is provided with a receiving metal fitting with an insertion hole in advance. A hook-shaped main body provided with a claw portion engageable with the insertion hole, and a wedge penetrating the upper surface portion of the main body and being inserted into the insertion hole. Further, a means for projecting an adjustment portion capable of coming into contact with the receiving metal fitting toward the claw portion on the back surface portion facing the claw portion of the main body was used.
[0008]
Further, in this means, in the second aspect of the present invention, means is selectively used in which the adjusting portion is provided by recessing a part of the back surface portion.
[0009]
On the other hand, as a method for connecting the temporary elements, in claim 3, a method for connecting another temporary element such as a handrail to a temporary element such as a post formed by protruding a receiving metal fitting with an insertion hole in advance, A coupling metal fitting provided on the temporary element having a hook-shaped main body having a claw portion engageable with the insertion hole and a wedge penetrating the upper surface portion of the main body and capable of being inserted into the insertion hole. A rear portion of the main body facing the claw portion of the main body is protruded toward the claw portion with an adjustment portion capable of contacting the receiving metal fitting, and the claw portion is engaged with the insertion hole, and then the wedge is inserted. The means of tightly inserting into the hole was used.
[0010]
Further, in this coupling method, in claim 4, the adjusting part uses a means in which a part of the back face part of the main body is recessed in the field.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a state in which the coupling member 10 according to the present invention is applied to a horizontal member 20 such as a handrail, and the horizontal member 20 is coupled to a column 30. In addition, the support | pillar 30 protrudes from the metal fitting 31 in advance at four places (illustration three places) of the surrounding surface, and the insertion metal fitting 32 penetrates this metal fitting 31 up and down. The coupling fitting 10 is fixed to one end of the horizontal member 20 with a bolt and nut 21. In this embodiment, the horizontal member 20 is configured to be rotatable about the bolt shaft of the bolt nut 21 as a rotation shaft.
[0012]
Next, the detailed structure of the coupling fitting 10 will be described. The coupling fitting 10 includes a main body 11 to which the horizontal member 20 is attached and a wedge 12 that is tightly inserted into the insertion hole 32. The main body 11 has an upper portion of a metal plate bent in a U shape, and a tip thereof serving as a claw portion 13 that can be engaged with the insertion hole 32. That is, the upper part of the main body 11 has a bowl shape. A through hole 15 for the wedge 12 is formed in the upper surface portion 14 of the main body 11. A mounting portion 17 for a bolt and nut 21 protrudes outward from the back surface portion 16 facing the claw portion 13.
[0013]
Further, a part of the back surface portion 16 is recessed toward the claw portion 13, and the recessed portion 18 is used as an adjustment portion of the main body 11. In addition, the recessed part 18 in this embodiment is horizontally long as shown in FIG. That is, the recessed portion 18 adjusts the place of the main body 11 by narrowing the distance between the claw portion 13 and the back surface portion 16, and is attached to the receiving metal fitting 31 with the coupling fitting 10. In this state, the metal fitting 31 comes into contact.
[0014]
According to the present coupling fitting 10 in which the recessed portion 18 is formed, it is possible to prevent the coupling fitting 10 from rattling or wobbling in a temporarily fixed state where the claw portion 13 is engaged with the insertion hole 32. it can. That is, since the support column 30 is generally cylindrical, when the coupling fitting 10 is temporarily fixed by the claw portion 13, the claw portion 13 contacts the support column 30 only at a point. For this reason, although the temporarily fixed coupling fitting 10 is easily rattled to the left and right, the recessed portion 18 is in contact with the receiving fitting 31 to suppress rattling of the coupling fitting 10 during temporary fixation.
[0015]
The following operation is also performed when the wedge 12 is driven. That is, if the wedge 12 is driven into the insertion hole 32, a force for expanding the insertion hole 32 acts as the degree of tight insertion increases. The insertion hole 32 may be deformed by repeatedly driving the wedge 12 or driving it strongly. However, since the recessed portion 18 holds the receiving metal 31 from the back, the insertion is performed so as to lose the wedge effect. The deformation of the hole 32 can be prevented.
[0016]
In the above-described embodiment, the recessed portion 18 is horizontally long. However, this may be circular or other shapes, and a plurality of the recessed portions 18 may be provided. Further, when providing a plurality of the recessed portions 18, for example, in the case of the receiving metal fitting 31 with the narrowing described here, it is also possible to provide a plurality of recessed portions 18 in the vertical direction so that the degree of protrusion increases in order from the top.
[0017]
Further, the recessed portion 18 can be provided at the factory when the coupling fitting 10 is molded, but can also be provided at the site. That is, if it confirms how much the receiving metal fitting 31 of the support | pillar 30 protrudes in the field, and if the recessed part 18 is provided, the effect | action mentioned above can be acquired reliably. At this time, the method for molding the recessed portion 18 is not particularly limited, but can be performed by a processing tool such as a punch. Further, in addition to the recessing process of the back surface part 16, it is only necessary to form a projection toward the claw part 13. For example, a small piece is adhered or welded to the base side of the back surface part 16, or the brazing is performed by an arc or the like. The adjustment part can also be constructed by placing it.
[0018]
Next, a method for connecting temporary elements according to the present invention will be described with reference to FIGS. In addition, the coupling metal to be used has the above-described structure, and the one provided with the recessed portion 18 in advance is attached to the end of the temporary element. Here, when attaching the handrail 50 to the support column 30, the preceding attachment for attaching the handrail 50 on the upper floor from the lower floor will be described. First, the handrail 50 in this case has a pine needle shape in which one end of a diagonal member 52 is rotatably joined to one end of a horizontal member 51, and the above-described coupling fitting 10 is attached to each end (three places). . Here, at least the coupling fitting 10 at the tip of the horizontal member 51 is rotatably attached by the above-described bolt-nut structure. Then, with the diagonal member 52 folded, the joint between the horizontal member 51 and the diagonal member 52 faces downward, and the claw portion of the joint fitting 10 at the tip of the horizontal member 51 is temporarily fixed to the receiving member 31 of the column 30 ( FIG. 3). Next, the diagonal member 52 is supported, the horizontal member 51 is set in a horizontal state, and the coupling fitting 10 relating to the joint is temporarily fixed. Subsequently, the coupling fitting at the tip of the remaining diagonal member 52 is temporarily fixed (FIG. 4), and finally the wedge 12 of each coupling fitting 10 is received and inserted into the insertion hole 32 of the fitting 31.
[0019]
According to this method, not only the action unique to the coupling fitting 10 can be obtained, but also when the wedge 12 is driven up, the handrail 50 is already present when climbing to the upper floor. A temporary structure can be constructed safely while preventing the fall.
[0020]
In addition, although the support | pillar and the handrail were illustrated as a temporary element in the said embodiment, of course, the temporary element to apply is not restricted to these.
[0021]
By the way, in this kind of wedge type fitting, the catch on the insertion hole 32 of the claw part 13 may become shallow. That is, if the nail | claw part 13 is lengthened, a catch can be deepened, However, Since the load bearing strength of the nail | claw part 13 falls correspondingly, it is hard to say that it is suitable to form the claw part 13 long in general. Accordingly, a fitting that can be securely fixed even when the catch by the claw portion 13 is shallow will be described with reference to FIG.
[0022]
The basic configuration of the coupling fitting shown in FIG. 5 is not different from the above-described embodiment. That is, this coupling metal fitting also includes a bowl-shaped main body 11 whose upper portion is bent in a U-shape and a wedge 12. However, in the case of this coupling fitting, the adjustment part such as the recessed part 18 is not an essential requirement. More specifically, in the coupling fitting, a wedge 12 is inserted into a through hole 15 in the upper part of the main body 11, but a retaining portion 19 such as a rivet is provided at the tip of the wedge 12, and the wedge 12 passes through the through hole 15. It is configured not to escape from the hole 15. Further, in the case of this embodiment, the through hole 15 is notched to the upper part of the main body back surface portion 16 so that the wedge 12 can be held in a lying state.
[0023]
As shown in FIG. 6, according to the above-described connecting metal fitting, the wedge 12 is first laid down, and in this state, the claw portion 13 is inserted into the insertion hole 32 of the metal fitting 31 and temporarily fixed. (Refer to FIG. 1A). Next, when the temporary movement of the temporary fitting element to which the coupling fitting is attached, and / or when the temporary fitting is lowered by an operator, the wedge 12 is moved downward by a certain amount or more. The receiving metal 31 hits the front lower surface 12a, and the coupling metal is then rotated in the direction indicated by the arrow with the front lower surface 12a contacting the receiving metal 31 serving as a force point and an action point, with the retaining portion 19 at the tip as a fulcrum. (Refer to FIG. 5B). When the wedge 12 rotates to a state close to being upright, the wedge 12 falls so as to pierce the insertion hole 32 by its own weight (see FIG. 3C). After that, it goes without saying that the wedge 12 may be driven and fixed.
[0024]
Thus, according to the coupling fitting described here, as a so-called auto-locking coupling fitting, the wedge 12 is inserted into the insertion hole 32 by free-fall when the claw portion 13 is temporarily fixed. It becomes high and the fitting is not accidentally detached. Therefore, the temporary structure can be constructed more safely.
[0025]
【The invention's effect】
As described above, according to the present invention, the main body of the wedge-type coupling metal fitting is provided with the recessed portion that adjusts the location thereof, so that the coupling metal fitting can be temporarily fixed without wobbling, and also after the temporary fixation, The rattling can be prevented and the construction work of the temporary structure can be performed safely. Further, the recessed portion prevents deformation of the receiving metal fitting due to the driving of the wedge. There is a practical advantage that these effects can be obtained by a simple configuration change.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of the present invention. FIG. 2 is a rear view of a joint fitting according to the embodiment. FIG. 3 is a first process explanation showing a construction method of a temporary element using the joint fitting. FIG. 4 is an explanatory diagram of the second process. FIG. 5 is a side view showing an auto-locking coupling fitting. FIG. 6 is an explanatory diagram of a process showing an operation procedure using the coupling fitting.
DESCRIPTION OF SYMBOLS 10 Coupling metal fitting 11 Metal fitting body 12 Wedge 13 Claw part 14 Main body upper surface part 15 Through hole 16 Main body rear face part 17 Bolt nut attaching part 18 Recessed part 19 Retaining part 20 Horizontal material 30 Post 31 Receiving metal fitting 32 Insertion hole

Claims (4)

A fitting provided on a separate temporary element, such as a handrail, to join a temporary element such as a support column, which is previously provided with a receiving metal fitting with an insertion hole, which is associated with the insertion hole. It has a bowl-shaped main body with a mating claw portion, a wedge that penetrates the upper surface portion of the main body and can be inserted into the insertion hole, and a back portion that faces the claw portion of the main body. A temporary element coupling metal fitting characterized in that a place adjusting portion capable of coming into contact with the receiving metal fitting protrudes toward the claw portion. The temporary adjustment element coupling bracket according to claim 1, wherein the adjustment portion is provided by recessing a part of the back surface portion. A method of joining another temporary element, such as a handrail, to a temporary element such as a column, which is formed by protruding a receiving metal fitting with an insertion hole in advance, and having a claw portion that can be engaged with the insertion hole The receiving metal fitting on the back surface of the main body facing the claw portion of the fitting for fitting provided in the temporary element provided with a wedge-shaped body and a wedge penetrating the upper surface of the main body and being able to be inserted into the insertion hole A temporary element coupling characterized by projecting an adjustment portion capable of abutting against the claw portion, engaging the claw portion with the insertion hole, and then inserting the wedge into the insertion hole. Method. 4. The temporary element coupling method according to claim 3, wherein the adjusting portion is provided by recessing a part of the back surface of the main body at the site.

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