JP2004324353A - Connection metal fitting for temporary installation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection metal fitting for temporary installation in which a temporarily fixing claw inserted in a reception metal fitting does not improperly drop out due to a slight impulsion. <P>SOLUTION: The metal fitting is used for connecting to a reception metal fitting having a spigot opening, provided with a temporary element such as a handrail or a bracing, etc. in a support when constructing scaffolding etc. and it can be fitted to the end of the temporary element. The metal fitting is constituted of a metal fitting body in which a downward insertion claw fixable to the insertion opening and a wedge insertable in a erected state in the insertion opening through the through hole in a fixed state that the insertion claw of the metal fitting body is fixed in the insertion opening. The through hole is formed at the upper side of the metal fitting body to be horizontally held so that the front edge of the wedge can not be removed and an angle adjusting means which gets into contact with the inside edge of the through hole by pulling down the metal fitting and the wedge is made rotatable from the horizontal state to the erected state is provided. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint fitting for fixing a temporary element such as a handrail or a brace to a receiving fixture provided in advance on a support when constructing a scaffold or a shoring at a construction site.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, when constructing a scaffold or a shoring (hereinafter, these are collectively referred to as “scaffolds or the like”), a support column having a receiving metal fitting having an insertion port on its peripheral surface integrated by welding or the like is used. You. On the other hand, there is a technique in which a wedge member is integrally provided at an end of a temporary element such as a handrail or a brace, and the temporary element is connected to the column by inserting the wedge member into the receiving bracket of the column. . According to this conventional technique, since the connection of the temporary element to the column is completed only by inserting the wedge member into the receiving bracket, the double clamp used up to that point becomes unnecessary, and the scaffolding and the like can be efficiently provided with respect to personnel and working time. Could be built.
[0003]
[Problems to be solved by the invention]
However, in the above-mentioned prior art, prior mounting of a handrail or the like is impossible, and work safety has not been ensured. That is, in the case of the prior art, since the wedge member is fixed to the end of the temporary element by welding or the like, the work must be performed on the target floor in order to connect the temporary element to the column. On the other hand, if the temporary element can be connected to the column from the floor one level below the destination floor, so-called pre-installation is possible, the safety of the connection work is always ensured by the handrail etc. installed earlier. Will be.
[0004]
The inventor of the present invention has come up with a fitting as shown in FIG. That is, the joining fitting forms a temporary fixing claw 52 by bending the upper side end of the U-shaped channel 51 attachable to the temporary element 50 such as a handrail or a brace downward, and forms the temporary fixing claw 52 on the upper and lower surfaces thereof. It comprises a combination of a metal fitting body 54 having a through hole 53 formed therein and a wedge member 55 insertable into the through hole 53. In order to connect the joining metal fitting to the receiving metal fitting 61 of the column 60, the temporary element 50 is manually supported from the lower floor, and the connecting metal fitting is lifted up to the receiving metal fitting 61 on the destination floor. The temporary fixing claw 52 is positioned above the insertion port 62 of the receiving metal fitting 61 by moving the temporary fixing claw 52 downward, and the connecting metal fitting is further pulled down to insert the temporary fixing claw 52 into the receiving metal fitting 61. By this operation, the hypothetical element 50 can be temporarily fixed in advance from the floor immediately below the destination floor. Therefore, when this operation is repeatedly performed to the upper floor, the safety of the working floor is always temporarily fixed in advance. Will be secured by Then, when the wedge member 55 is driven into the receiving fitting 61 by using a hammer or the like, the permanent fixing of the connecting fitting is completed.
[0005]
However, the following problems are also present in the coupling hardware devised above. This is because the temporary element 50 is temporarily fixed by the temporary fixing claw 52 at the time of the preliminary mounting, but the clearance A of the opening 56 of the metal fitting body 54 is set to be slightly longer than the overall height B of the receiving metal fitting 61, so that it is temporarily connected. When a downward force is applied to the metal fitting, the temporary fixing claw 52 comes out of the receiving metal fitting 61, the temporary fixing state is released, and the temporary element may drop.
[0006]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a temporary connecting fitting in which a temporary fixing claw inserted into a receiving fitting is not inadvertently dropped by a slight impact.
[0007]
On the other hand, in the above-mentioned prior art, it is assumed that the insertion of the temporary fixing claw 52 and the driving of the wedge member 55 are performed by different operations. However, it is preferable that the wedge member 55 can be simultaneously inserted into the receiving metal fitting when the temporary fixing claw 52 is inserted, because it is possible to more reliably prevent the fitting metal from falling off. A technique disclosed in Japanese Patent Application Laid-Open No. 2001-164744 is one which discloses such a so-called auto-lock type fitting. The joining fitting disclosed in the publication is a combination of a holder member provided at both ends of a horizontal member such as a handrail, and a wedge member for fastening a holder member and a holder member within the holder member. When the wedge member is inserted into the receiving member, the inner edge of the rod-shaped portion of the wedge member comes into contact with the receiving member, so that the locking step of the wedge member comes off the lower horizontal rail of the holder member, and the wedge member falls by its own weight. As a result, the wedge portion falls into the coupling hole of the receiving member, and the wedge portion fixes the receiving member and the holder member in a state where the front wall of the holder member is pressed against the column.
[0008]
However, this joint has the following problems. That is, first, the applicable metal fitting is limited to a plate-shaped metal fitting, and cannot be applied to, for example, a pocket-shaped metal fitting. Second, in this connection fitting, since the holder member is moved horizontally and inserted into the receiving fitting, it is difficult to attach the handrail or the like in advance. Third, since the wedge member has a complicated structure in which the wedge portion and the rod-shaped portion are formed in a forked shape, and furthermore, the rod-shaped portion is formed with a locking step, so that there is also a problem that the molding or product cost increases. I can't deny it. Therefore, an object of the present invention is to solve the problems described here.
[0009]
[Means for Solving the Problems]
According to the present invention, in order to achieve the above-described object, when constructing a scaffold or the like, a connecting metal fitting for connecting a temporary element such as a handrail or a brace to a receiving metal fitting having an insertion port provided in a support, A fitting main body having a through hole formed on an upper side provided with a downward insertion claw that can be attached to the end of the temporary element and that can be hooked on the insertion port, is different from the insertion claw of the metal fitting body. A wedge that can be inserted upright into the insertion port through the through hole in a state of being hooked on the insertion port, and the through hole holds the wedge horizontally so that the tip thereof cannot be removed. Means are formed on the upper side of the metal fitting body, and provided at the tip of the wedge with an angle adjuster that can rotate the wedge from a horizontal state to a standing state by contacting the inner edge of the through hole by pulling down the metal fitting body. Was used. According to this means, the wedge penetrates the receiving fitting in an upright state through the through hole of the fitting main body, and the temporary element is fixed to the receiving fitting by the wedge effect. In addition, the wedge angle adjusting portion slightly protrudes into the upper side through hole in the horizontal state (in a laid state) before being fixed, and the insertion claw is fitted into the metal fitting, that is, the metal fitting main body lowering operation. As a result, an upward force acts on the angle adjusting portion by contacting the inner edge of the receiving fitting. Then, the upward force acting on the angle adjusting unit is converted into a rotational force with the tip of the wedge as a fulcrum, and the wedge is shifted from the horizontal state to the upright state.
[0010]
In order to configure the angle adjusting portion that performs such an action, it is achieved by expanding the front of the slope edge in a curved shape (claim 2) or bending the front of the slope edge (claim 3). Can be.
[0011]
According to the fourth aspect of the present invention, a notch is provided at the other edge of the slope edge so that the inner edge of the upper side through-hole can be engaged when the wedge is in an upright state by the above operation. According to this means, the standing state of the wedge is stabilized. Then, if the engagement is released by changing the posture of the bracket main body or applying vibration, the wedge immediately falls under its own weight.
[0012]
In claim 5, the adjustment is made such that the center of gravity is located closer to the front of the wedge. As a specific means therefor, it is possible to form a hole in a part of the wedge (claim 6) or to adjust the wedge by a retaining portion (claim 7). As described above, the wedge whose center of gravity is located closer to the front can smoothly rotate and fall to the above-described standing state.
[0013]
Further, in the eighth aspect, the metal fitting body is formed such that the clearance of the opening is smaller than the total height of the receiving metal fitting at the upper side end of the U-shaped channel whose clearance in the upper and lower surfaces is larger than the total height of the receiving metal fitting. Means was used in which an insertion claw for the receiving fitting bent downward was provided. In this case, since the opening of the metal fitting body (from the tip of the insertion claw to the channel or the lower surface) is smaller than the overall height of the receiving metal fitting, the insertion claw cannot be inserted into the receiving metal fitting unless the metal fitting body is tilted forward. On the other hand, once the insertion claw is inserted into the receiving fitting, the insertion claw does not come out of the receiving fitting even if an upward force is applied to the fitting main body due to an impact or the like.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the best mode of the present invention will be described with reference to the accompanying drawings. Each figure in FIG. 1 shows the front (a), side (b), back (c), and plane (d) of the fitting according to the first embodiment. A metal fitting body formed by bending the end of the vertically bent portion of the character-shaped channel further downward to form an insertion claw 1a and a receiving jaw 1b, and a through hole 1c formed in the upper and lower surfaces of the metal fitting body 1. A wedge 3 that can be inserted into 1d and a mounting member 3 for a temporary element provided integrally with the back plate 1e of the fitting body 1.
[0015]
Each member will be described in more detail. First, the metal fitting main body 1 receives the clearance of the upper and lower surfaces and sets it to be larger than the total height H of the metal fitting 6, while the opening 10 thereof, that is, the clearance C between the tip and the lower surface of the insertion claw 1a is As shown in FIG. 2, the overall height H of the receiving bracket 6 is set to be smaller. In addition, as described above, through-holes 1c and 1d communicating with the upper and lower surfaces of the metal fitting body 1 are formed. More specifically, as shown in the front view (FIG. 1a), The upper through hole 1c is smaller than the lower through hole 1d. At the same time, a rivet 2a is provided at the lower end of the wedge 2 to prevent the rivet 2a from passing therethrough, while the lower surface side through hole 1d is set to a width that allows the rivet 2a to pass through. By setting the width to be smaller than the width, the wedge 2 separate from the metal fitting main body 1 is configured not to fall out of the upper side through hole 1c. Further, as shown in the rear view (FIG. 1c), the upper side through hole 1c is formed by cutting out to the upper part of the back plate 1e, and the wedge 2 is laid down before the fixing work of the present fitting is performed. To be able to hold. Further, by cutting the upper side through hole 1c up to the upper part of the insertion claw 1a, the upright state of the wedge 2 is stabilized as described later.
[0016]
On the other hand, as shown in FIG. 3, the specific structure of the wedge is such that one of the front and rear edges is a sloped edge 2b, and a curved portion 2c is swelled in front of the sloped edge 2b. -Molded so that 2d is continuous. In the curved portion 2c, the distance from the step portion 2f (boundary portion of the sloped edge 2b to the linear portion) to the distal end arc portion 2d substantially matches the inner size of the metal fitting body 1 from the insertion claw 1a to the back plate 1e. It is formed in size. Therefore, when the wedge 2 is set on the metal fitting body 1, the curved portion 2 c protrudes downward inside the upper side through hole 1 c, and the two-point support of the step portion 2 f and the tip arc portion 2 d changes the state. maintain. In this embodiment, a cutout portion 2g is formed ahead of the other vertical edge 2e. The notch 2g stabilizes the wedge 2 in an upright state by engaging with the insertion claw 1a side edge of the upper side through hole 1c, as described later.
[0017]
Next, the operation of fixing the temporary element by the above-described connecting fitting will be described with reference to FIG. In the figure, reference numeral 4 denotes a temporary element rotatably connected to the mounting member 3 of the metal fitting body 1 and reference numeral 5 denotes a connecting member integrally provided with the temporary element 4, which is connected to the mounting member 3. If the temporary element 4 is made of a diagonal material such as a brace, another temporary element such as a handrail can be connected to the connecting member 5. In this case, a handrail frame that is also used as a crutch as a whole is formed. can do. Since such a basic configuration is known in Japanese Patent Application Laid-Open No. 2003-41760 filed by the present applicant, the known technology is appropriately adopted, and the details are omitted here.
[0018]
To explain the pre-attachment of the handrail frame as an example, prior to the work, first, the wedge 2 is set in a state of being laid on the upper surface side of the fitting main body 1 according to the above-described procedure, and the temporary element 4 is set. Is lifted up by hand, and the insertion claw 1a is positioned above the metal fitting 6 (FIG. 2A). Next, the temporary element 4 is rotated to tilt the metal fitting body 1 forward so that the corner 1h on the side of the insertion claw 1a of the metal fitting body 1 comes into contact with the support column 7, and the temporary element 4 is slightly lowered (FIG. 6B). . By doing so, the insertion claw 1a of the fitting main body 1 having the opening 10 narrower than the overall height H of the receiving fitting 6 can be inserted into the receiving fitting 6. Further, the wedge 2 is a spring that rotates the temporary element 4 and slightly rotates in the same direction with the circular arc portion 2d as a fulcrum (FIG. 3C). Then, by rotating the temporary element 4 so as to be vertical and further lowering the temporary element 4, the fitting main body 1 tilted forward can be returned to the original state while the insertion claw 1a is inserted into the receiving fitting 6. . Also, at this time, the wedge 2 is in a state where the curved portion 2c rides on the inner edge 6a of the receiving metal member 6 (FIG. 4D). In the state where the curved portion 2c rides on the inner edge 6a of the receiving fitting 6, the wedge 2 is in a state of being slightly inclined upward (downward). In this state, the temporary element 4 is operated to slightly separate the insertion claw 1a from the column 7 and the temporary element 4 is lowered, so that the inner edge 6a of the receiving fitting 6 pushes up the curved portion 2c, and the wedge 2 It rotates about the contact point between the arc portion 2d and the insertion claw 1a and becomes almost upright (e in the figure). As described above, the curved portion 2c interferes with the inner edge 6a of the receiving fitting 6, and functions as an angle adjusting portion for shifting the wedge 2 from the horizontal state to the upright state.
[0019]
Further, by lowering the temporary element 4, it is not impossible to bring the wedge 2 to a completely vertical state and drop the wedge 2 between the insertion claw 1 a and the receiving fitting 6 by its own weight. There is also. If the fixing operation is completed here, even if an upward force is applied to the joint fitting, the insertion claw 1a does not come out of the receiving fitting 6. This is because the clearance C of the opening 10 of the fitting main body 1 is smaller than the overall height H of the receiving fitting 6.
[0020]
However, in the state of FIG. 4E, the wedge 2 maintains the upright state by the two-point support of the wedge tip at both the curved portion 2c and the tip arc portion 2d, and the wedge 2 easily falls back to the original horizontal state on the way. That instability is undeniable. Then, in this embodiment, in order to ensure the automatic locking by the wedge 2, the following work is subsequently performed. That is, from the state shown in FIG. 4e, the temporary element 4 is rotated counterclockwise in the drawing with the contact point between the receiving jaw 1b of the metal fitting body 1 and the support 7 as a fulcrum (FIG. 4f). Then, the wedge 2 is rotated so that the rear portion leans on the column 7 by the pressing force from the insertion claw 1a acting on the front side of the vertical edge 2e. By doing so, the inner edge of the insertion claw 1a engages with the notch 2g provided on the vertical edge 2e of the wedge 2, and as a result, the upright state of the wedge 2 is determined by the engagement and the contact between the rear portion and the support column 7. To be more stable. Then, when the fitting body 1 is pushed toward the column 7 so that the insertion claw 1a contacts the column 7 from this state, the engagement is released, and the wedge 2 falls by its own weight in the vertical direction (FIG. 4g). Until the tip protrudes from the lower surface side through-hole 1d, the tip is pierced into the gap between the insertion claw 1a and the receiving fitting 6, and the fixing operation is completed (FIG. 4h).
[0021]
Here, another feature of the above embodiment will be described. The wedge 2 is provided with two holes 2i so that the center of gravity is closer to the tip. Thus, the transition of the wedge 2 to the upright state and the fall can be performed smoothly.
[0022]
In the work procedure shown in FIG. 4, each fixation is described in the state of frame advance, and the operation is performed continuously without any difficulty, and the time required is only a few seconds. This has been confirmed by a private experiment by the present inventors. The notch 2g formed in the vertical edge 2e of the wedge 2 is particularly effective when the depth of the receiving metal 6 is relatively large, and can be omitted when the depth is small. This is because when the depth of the receiving fitting 6 is small, the wedge 2 stands up easily.
[0023]
Next, a second embodiment of the present invention will be described with reference to FIG. The only structural change from the first embodiment is the shape of the tip of the wedge, so only the change will be described here. That is, the wedge 20 according to the second embodiment is characterized in that its tip is slightly bent toward the slope edge 21 side. Although the bending portion and the bending ratio are not strictly set, at least when the wedge 20 is laid on the metal fitting body 1, the inner corner portion 22 is formed on the rear surface of the upper side through hole 1 c in the metal fitting body 1. What is necessary is just to be located so that it may correspond to a side edge and the bent part 23 may project below the upper side through-hole 1c of the metal fitting main body 1. The corner portion 22 and the bent portion 23 include a stepped portion 2f for stabilizing the laid state in the wedge 2 of the first embodiment and a curved portion 2c for abutting the inner edge 6a of the receiving fitting 6 to erect the wedge. It has the same function.
[0024]
As shown in FIG. 6, the work procedure using the connecting fitting employing the wedge 20 according to the second embodiment is as follows. First, the fitting main body 1 is set in a lying state (a in FIG. 6), and then, When the insertion claw 1a is inserted into the receiving fitting 6 in the same manner as described in the first embodiment (b in the drawing) and the temporary element 4 is pulled down in this state (c in the drawing), the inner edge of the receiving fitting 6 is obtained. 6a pushes up the bent portion 23, so that the wedge 20 rotates with the tip arc portion 24 as a fulcrum and rises (d in the figure), and the wedge 20 falls into the gap between the receiving fitting 6 and the insertion claw 1a (the same figure). e).
[0025]
As described above, in both of the above-described embodiments, not only the provisional attachment of the temporary element is possible, but also the insertion claw 1a inserted into the receiving metal member 6 is not inadvertently pulled out, and only by operating the temporary element. Automatic locking by the wedge is completed. Further, the metal fitting to be applied is not limited to the pocket-shaped one illustrated here, but may be the plate-shaped one described in the related art. However, in this case, since the clearance C of the opening 10 of the metal fitting body 1 cannot be made smaller than the total height H of the metal fitting, it is not necessary to satisfy this requirement. Further, since both the metal fitting body and the wedge have relatively simple structures, the molding cost is lower than that of the prior art. Although the automatic locking by the falling of the weight of the wedge has been described here, a method of driving the wedge with a hammer or the like afterwards in order to further increase the fixing strength is not excluded.
[0026]
【The invention's effect】
As described above, according to the present invention, since the angle adjustment portion with the receiving fitting protruding from the upper side through hole of the fitting main body is provided in front of the wedge, the operation is performed immediately after the insertion claw is inserted into the receiving fitting. An upward force acts on the angle adjusting section following the above, and the wedge can be quickly shifted from the horizontal state to the upright state. Further, since the configuration of the angle adjusting section is a relatively simple configuration such as forming a swelling curved section or bending the tip of a wedge, it is possible to suppress an increase in product cost. Furthermore, since the center of gravity is located at the tip of the wedge, the transition to the upright state and the fall are smooth, and the auto-lock work is simplified. Furthermore, since the connection fitting of the present invention can be applied irrespective of a plate shape or a pocket shape as long as the reception fitting has an inner edge, it can be positioned as a versatile temporary member. Furthermore, if the connecting bracket of the present invention is used for connecting handrails or bracing, or a dual-purpose handrail frame, it can be used for pre-installation, and the contribution to the safety of construction of scaffolds and the like is very large. There are many things.
[Brief description of the drawings]
FIG. 1 is an overall view of a fitting according to a first embodiment of the present invention. FIG. 2 is an explanatory view showing the relationship between the fitting and a receiving fitting. FIG. 3 is a detailed explanatory view of a wedge in the fitting. FIG. 4 is a process chart showing a manual procedure using the same fitting. FIG. 5 is an overall view of a fitting according to a second embodiment of the present invention. FIG. 6 is a process diagram showing a working procedure using the same fitting. 7: Schematic diagram of conventional fittings devised by the inventor [Description of reference numerals]
Reference Signs List 1 metal fitting body 1a insertion claw 1b receiving jaw 1c upper side through hole 1d lower side through hole 1e back plate 2, 20 wedge 2a retaining part (rivet)
2b Inclined edge 2c Swelled curved portion 2d Tip arc 2e Vertical edge 2f Step 2g Notch 3 Mounting member 4 Temporary element 5 Connecting member 6 Receptacle 6a Inner edge 7 Prop

Claims (8)

When constructing a scaffold or the like, it is a fitting for connecting a temporary element such as a handrail or a brace to a receiving fitting having an insertion port provided in a support, and can be attached to an end of the temporary element, and A fitting body having a through hole formed on an upper side provided with a downward insertion claw that can be hooked on the insertion port; and the through hole in a state where the insertion claw of the fitting body is hooked on the insertion port. And a wedge that can be inserted into the insertion port in an upright state through the through hole, and the through-hole is formed on the upper side of the bracket main body so as to horizontally hold the wedge in a state where its tip cannot be removed, A fitting for temporary attachment, characterized in that an angle adjuster is provided at the tip of the wedge so as to be able to rotate the wedge from a horizontal state to an upright state by contacting the inner edge of the through-hole by pulling down the fitting body. The temporary fitting according to claim 1, wherein the angle adjusting portion is formed by expanding a curved edge of the wedge in a forward direction. The temporary fitting according to claim 1, wherein the angle adjusting portion is formed by bending a front end of the wedge toward a slope edge. 4. The temporary fitting according to claim 1, wherein a notch is provided on the other edge of the sloped edge so as to engage with the inner edge of the upper through hole when the wedge is in an upright state. The temporary fitting according to any one of claims 1 to 4, wherein the wedge is adjusted so that the center of gravity is located closer to the front. 6. The temporary fitting according to claim 5, wherein the center of gravity is adjusted by a punch formed in a part of the wedge. The temporary fitting according to claim 5, wherein the center of gravity is adjusted by a retaining portion. The metal fitting body is bent downward so that the clearance of the opening is smaller than the total height of the receiving metal fitting at the upper side end of the U-shaped channel whose clearance on the upper and lower surfaces is larger than the total height of the receiving metal fitting. The temporary fitting according to any one of claims 1 to 7, further comprising an insertion claw to the receiving fitting.

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