JP4061235B2 - Temporary coupling bracket - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a coupling fitting for fixing a temporary element such as a handrail or a brace to a receiving bracket provided in advance on a support column when constructing a scaffold or a supporting work at a construction site.
[0002]
[Prior art]
Conventionally, in constructing scaffolds and support works (hereinafter collectively referred to as “scaffolds”), struts in which a receiving metal fitting having an insertion port in advance on its peripheral surface is integrated by welding or the like. The On the other hand, there is a technique in which a wedge member is integrally provided at an end portion of a temporary element such as a handrail or a brace, and the temporary element is coupled to the column by inserting the wedge member into the receiving bracket of the column. . According to this prior art, by simply inserting the wedge member into the metal fitting, the connection of the temporary element to the support column is completed, so the double clamp that has been used up to now is not required, and the scaffolding etc. can be efficiently used in terms of personnel and work time. Was able to build.
[0003]
[Problems to be solved by the invention]
However, in the above prior art, it is impossible to perform prior attachment such as a handrail, 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 operation must be performed on the target floor in order to connect the temporary element to the support column. On the other hand, if so-called advance attachment is possible, in which a temporary element is joined to a column from the floor one floor below the target floor, the joining work is always secured by a handrail attached first. Will be.
[0004]
Therefore, the present inventor has come to create a coupling fitting as shown in FIG. 7 in order to enable the preceding attachment such as the handrail described above. That is, the coupling fitting is formed by temporarily bending the upper side end portion of the U-shaped channel 51 that can be attached to the temporary element 50 such as a handrail or a brace downward to form the temporary fixing claw 52 and on the upper and lower surfaces thereof. A metal fitting body 54 formed with a through hole 53 and a wedge member 55 that can be inserted into the through hole 53 are combined. In order to connect this connecting bracket to the receiving bracket 61 of the support column 60, the temporary element 50 is supported by hand from the lower floor and the connecting bracket is lifted to the receiving bracket 61 on the target floor, and then the connecting bracket is directed to the supporting column 60. Then, the temporary fixing claw 52 is positioned above the insertion port 62 of the metal fitting 61, and the coupling metal is pulled down to insert the temporary fixing claw 52 into the metal fitting 61. As a result of this work, the hypothesis element 50 can be temporarily fixed in advance from one floor below the destination floor. Therefore, when this process is repeated to the upper floor, the safety of the work floor is always temporarily fixed in advance. Will be secured. Then, when the wedge member 55 is driven into the receiving bracket 61 using a hammer or the like, the main fixing of the coupling bracket is completed.
[0005]
However, there are the following problems in the above-developed coupling fittings. The temporary element 50 is temporarily fixed by the temporarily fixing claw 52 at the time of prior mounting, but the clearance A of the opening 56 of the metal fitting body 54 is set slightly longer than the overall height B of the receiving metal fitting 61. If a downward force is applied to the metal fitting, the temporarily fixing claw 52 comes out of the receiving metal fitting 61, the temporarily fixed state is released, and the temporary element may fall.
[0006]
Accordingly, the present invention has been made with the object of providing a temporary coupling fitting in which a temporary fixing claw inserted into a receiving fitting does not fall inadvertently due to a slight impact.
[0007]
On the other hand, the above prior art assumes that the temporary fixing claw 52 is inserted and the wedge member 55 is driven by separate operations. However, if the wedge member 55 can be simultaneously inserted into the receiving metal fitting when the temporarily fixing claw 52 is inserted, it is preferable that the coupling metal can be more reliably prevented from falling off. Japanese Patent Laid-Open No. 2001-164744 discloses a technique for disclosing such a so-called auto-lock type fitting. The joint 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 that fastens the support bracket and the holder member within the holder member. When the hook is inserted into the receiving bracket, the inner edge of the hook-shaped portion of the wedge member abuts against the receiving bracket, so that the locking step of the wedge member comes off from the lower side rail of the holder member, and the wedge member falls by its own weight. Then, the wedge part falls into the coupling hole of the receiving metal fitting, and the wedge part fixes the receiving metal fitting and the holder member in a state where the front wall of the holder member is pressed against the support column.
[0008]
However, this coupling metal has the following problems. That is, first, the applicable metal fittings are limited to plate-like ones, and cannot be applied to, for example, pocket-shaped metal fittings. Secondly, in this coupling fitting, the holder member is moved horizontally and inserted into the receiving fitting, so that it is difficult to perform prior attachment such as a handrail. Thirdly, since the wedge member has a complicated structure in which a wedge portion and a hook-like portion are formed in a bifurcated shape, and a locking step portion is formed in the hook-like portion, there is a problem that molding or product cost is increased. I can't deny it. Therefore, the present invention aims to solve the problems described here.
[0009]
[Means for Solving the Problems]
In order to achieve the above-described object, the present invention provides a coupling 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 when building a scaffold or the like, A fitting body formed by forming a through hole on the upper side provided with a downward insertion claw that can be attached to the end of the temporary element and that can be hooked to the insertion port, and the insertion claw of the fitting body are A wedge that can be inserted into the insertion port in an upright state through the through hole while being hooked in the insertion port, and the through hole holds the wedge horizontally in a state in which the tip cannot be removed. Means formed on the upper side of the metal fitting body and provided with an angle adjusting portion at the tip of the wedge so as to contact the inner edge of the receiving metal fitting by pulling down the metal fitting body so that the wedge can be rotated from the horizontal state to the standing state. Was used. According to this means, the wedge is pierced in a standing state in the receiving metal via the through hole of the metal body, and the temporary element is fixed to the receiving metal by the wedge effect. In addition, the wedge angle adjustment part slightly protrudes into the upper through-hole in the horizontal state (laying down state) before fixing, and the operation of fitting the insertion claw into the fitting, that is, the lowering work of the fitting body As a result, an upward force is applied to the angle adjusting portion in contact with the inner edge of the receiving metal fitting. Then, the upward force acting on the angle adjusting unit is converted into a rotational force with the wedge tip as a fulcrum, thereby shifting the wedge from the horizontal state to the standing state.
[0010]
An angle adjusting unit that performs such an action can be achieved by expanding or bending the tip of the wedge in a curved shape .
[0011]
Further, in the present invention, a means is used in which a notch portion that can be engaged with the inner edge of the upper through hole is provided on the other edge of the angle adjusting portion when the wedge is in an upright state by the above-described action. According to this means, the standing state of the wedge is stabilized. If the engagement is released by changing the posture of the metal fitting main body or applying vibration, the wedge immediately falls due to its own weight.
[0012]
In Claim 5, it adjusted so that a gravity center might be located near the front of a wedge. Specific examples of the means include forming a part of the wedge (Claim 6) and adjusting the part with a retaining part (Claim 7). As described above, the wedge whose center of gravity is located closer to the front can smoothly rotate and drop to the standing state described above.
[0013]
Further, in the present invention , the metal fitting body is faced downward so that the clearance of the upper and lower surfaces is larger than the overall height of the receiving metal fitting and the opening clearance is smaller than the overall height of the receiving metal fitting. The means of providing an insertion claw to the receiving metal member bent in the above manner was used. 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 metal fitting unless the metal fitting body is tilted forward. On the other hand, once the insertion claw is inserted into the metal fitting, the insertion claw does not come out of the metal fitting even if an upward force is applied to the metal fitting body due to impact or the like.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. 1 shows the front (a), side (b), back (c), and plane (d) of the coupling fitting according to the first embodiment. A metal fitting body formed by bending the ends of the upper and lower bent portions of the letter-shaped channel further downward to form an insertion claw 1a and a receiving jaw 1b, 2 is 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 is a mounting member for a temporary element integrally provided on the back plate 1e of the metal fitting body 1.
[0015]
To explain each member in more detail, first, the metal fitting body 1 receives the clearance of the upper and lower surfaces and is set to be larger than the total height H of the metal fitting 6, while the opening C, that is, the clearance C between the tip and the lower surface of the insertion claw 1a is set. As shown in FIG. 2, it is set to be smaller than the total height H of the receiving metal fitting 6. In addition, the metal fitting body 1 is formed with through holes 1c and 1d communicating with the upper and lower surfaces as described above. More specifically, as shown in the front view (FIG. 1a), The upper side through hole 1c is narrower than the lower side through hole 1d. At the same time, a rivet 2a is provided at the lower end portion of the wedge 2, and the lower surface side through hole 1d is set to a width allowing passage of the rivet 2a, while the upper side through hole 1c is set to the rivet 2a. By setting the width to be narrower than the width, the wedge 2 that is separated from the metal fitting body 1 is configured not to fall off from 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. To be able to hold on. Further, by cutting out the upper side through hole 1c up to the upper portion of the insertion claw 1a, the standing state of the wedge 2 is stabilized as will be 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 forward, and the tip is an arcuate portion 2d. -Molded so that 2d is continuous. In the bending portion 2c, the distance from the step portion 2f (boundary portion with the straight portion of the gradient edge 2b) to the tip arc portion 2d substantially matches the inner dimension from the insertion claw 1a to the back plate 1e in the metal fitting body 1. It is formed in size. Therefore, when the wedge 2 is set in the state of being laid on the metal fitting body 1, the curved portion 2c protrudes downward inside the upper side through hole 1c, and this state is supported by the two-point support of the step portion 2f and the tip arc portion 2d. maintain. In this embodiment, a notch 2g is formed at the tip of the other vertical edge 2e. As will be described later, the notch 2g engages with the insertion claw 1a side edge of the upper side through hole 1c to stabilize the wedge 2 in an upright state.
[0017]
Next, the fixing operation of the temporary element by the coupling metal fitting having the above configuration will be described with reference to FIG. In the figure, 4 is a temporary element that is pivotally connected to the mounting member 3 of the metal fitting body 1, and 5 is a connecting member that is integrally provided on the temporary element 4, and is connected to the mounting member 3. If the temporary element 4 is an oblique member such as a brace, another temporary element such as a handrail can be coupled to the connecting member 5, and in this case, a pine needle-shaped balustrade frame is formed as a whole. can do. Such a basic configuration is publicly known in Japanese Patent Application Laid-Open No. 2003-41760 related to the applicant's application, and therefore, the publicly known technology is appropriately adopted, and details thereof are omitted here.
[0018]
Then, the prior attachment of the handrail frame will be described as an example. Prior to the work, the wedge 2 is first set on the upper surface side of the metal fitting body 1 according to the above-described procedure, and the temporary element 4 is set. Is lifted up by hand and positioned up to the upper part of the receiving metal 6 with the insertion claw 1a (FIG. 1a). Next, the temporary element 4 is rotated so that the metal fitting body 1 is tilted forward so that the insertion claw 1a side corner portion 1h of the metal fitting body 1 is in contact with the support column 7, and the temporary element 4 is slightly pulled down (FIG. 5B). . By doing so, the insertion claw 1 a of the metal fitting body 1 having the opening 10 narrower than the overall height H of the metal fitting 6 can be inserted into the metal fitting 6. Further, the wedge 2 is a spring obtained by rotating the temporary element 4, and slightly rotates in the same direction as the tip arc portion 2d as a fulcrum (FIG. 3c). Then, by rotating the temporary element 4 so as to be vertical and further pulling down the temporary element 4, it is possible to return the metal body 1 tilted forward while the insertion claw 1 a is inserted into the metal fitting 6 to the original state. . At this time, the wedge 2 is in a state in which the curved portion 2c is on the inner edge 6a of the metal fitting 6 (d in FIG. 4). Thus, in a state where the curved portion 2 c is on the inner edge 6 a of the receiving metal fitting 6, the wedge 2 is slightly inclined to rise up (fall down first). Then, by operating the temporary element 4 from this state and slightly pulling the insertion claw 1a away from the support column 7 and lowering the temporary element 4, the inner edge 6a of the receiving metal 6 pushes up the curved portion 2c, and the wedge 2 has a tip. The contact point between the circular arc part 2d and the insertion claw 1a is rotated as a fulcrum and is almost upright (e in FIG. 5). In this way, the bending portion 2c functions as an angle adjusting portion that interferes with the inner edge 6a of the receiving metal fitting 6 and shifts the wedge 2 from the horizontal state to the standing state.
[0019]
Further, by pulling down the temporary element 4, it is not impossible to bring the wedge 2 into a completely vertical state and to drop the wedge 2 between the insertion claw 1a and the receiving metal fitting 6 by its own weight. There is also. Further, if the fixing work is completed here, even if an upward force is applied to the coupling 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 metal fitting body 1 is smaller than the total height H of the receiving metal fitting 6.
[0020]
However, in the state of FIG. 4e, the wedge 2 is maintained in the standing state by the two-point support of the wedge tip, both of the curved portion 2c and the tip arc portion 2d, and the wedge 2 easily falls down to the original horizontal state in the middle thereof. I cannot deny the instability. Therefore, in this embodiment, in order to ensure the auto-locking by the wedge 2, the following operation is subsequently performed. That is, from the state of 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 column 7 as a fulcrum (FIG. 4f). Then, the wedge 2 rotates so that the rear part leans against the column 7 by the pressing force from the insertion claw 1a acting on the tip of the vertical edge 2e. By doing so, the inner edge of the insertion claw 1a is engaged with the notch 2g provided in the vertical edge 2e of the wedge 2, and as a result, the standing state of the wedge 2 is the engagement and the contact between the rear portion and the column 7 More stable. When the metal fitting body 1 is pushed toward the support column 7 so that the insertion claw 1a contacts the support column 7 from this state, the engagement is released and the wedge 2 falls by its own weight in the vertical direction (FIG. 4g). The insertion work is completed until the tip protrudes from the lower surface side through hole 1d, 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 cutouts 2i so that the center of gravity is closer to the tip. As a result, the wedge 2 can be smoothly transitioned to the standing state and dropped.
[0022]
The work procedure shown in FIG. 4 has been described in a state of frame advance so that each fixing is performed, and the operation is continuously performed without any difficulty, and the required time is only a few seconds. This has been confirmed by unpublished experiments by the present inventors. Further, the notch 2g formed in the vertical edge 2e of the wedge 2 is particularly effective when the depth of the metal fitting 6 is relatively large, and can be omitted when the depth is small. This is because the wedge 2 easily stands up when the depth of the metal fitting 6 is small.
[0023]
Next, a second embodiment of the present invention will be described with reference to FIG. Since the structural change from the first embodiment is only the tip shape of the wedge, 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 gradient edge 21 side. The bending portion and the bending rate are not strictly set, but when at least the wedge 20 is laid on the metal fitting body 1, the inner corner 22 is the back surface of the upper 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 bending part 23 may protrude below the upper side through-hole 1c of the metal fitting main body 1. FIG. The corner portion 22 and the bent portion 23 are a step portion 2f that stabilizes the laying state in the wedge 2 of the first embodiment, and a curved portion 2c that abuts the inner edge 6a of the receiving metal fitting 6 and raises the wedge. Because it has the same function.
[0024]
As shown in FIG. 6, the work procedure using the fitting 20 employing the wedge 20 according to the second embodiment is first set in a state in which the fitting body 1 is laid down (the figure a), and then. If the insertion claw 1a is inserted into the metal fitting 6 in the same manner as described in the first embodiment (Fig. B), and the temporary element 4 is pulled down in this state (Fig. C), the inner edge of the metal fitting 6 6a pushes up the bent portion 23, and the wedge 20 rotates and rises with the tip arc portion 24 as a fulcrum (Fig. D), and the wedge 20 falls into the gap between the receiving metal 6 and the insertion claw 1a (Fig. 6). e).
[0025]
Thus, in both of the above-described embodiments, not only the temporary attachment of the temporary element is possible, but also the insertion claw 1a inserted into the receiving metal fitting 6 is not accidentally pulled out, and only the temporary element is operated. Auto-lock with wedge is completed. Further, the receiving metal fitting to be applied is not limited to the pocket shape illustrated here, but may be the plate shape 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 overall height H of the metal fitting, it is not necessary to satisfy this requirement. Furthermore, since the metal fitting body and the wedge are relatively simple in construction, the molding cost is lower than that of the prior art. Here, the auto-lock by the falling of the wedge by its own weight has been described. However, in order to further increase the fixing strength, a method of using the hammer to be driven later with a hammer or the like is not excluded.
[0026]
【The invention's effect】
As described above, according to the present invention, since the angle adjusting part with the receiving metal fitting protruding from the upper through hole of the metal fitting body is provided at the tip of the wedge, the operation is performed immediately after the insertion claw is inserted into the metal receiving metal fitting. Following this, an upward force acts on the angle adjusting section, and the wedge can be quickly shifted from the horizontal state to the standing state. Moreover, since the structure of an angle adjustment part is a comparatively simple structure which forms an expansion | swelling curved part or bends the tip of a wedge, the raise of the product cost can be suppressed. In addition, since the center of gravity is located at the edge of the wedge, the transition to the standing state and the falling are smooth, and the auto-locking work is simplified. Furthermore, since the coupling fitting of the present invention can be applied regardless of the plate shape or pocket shape as long as the receiving fitting has an inner edge, it can be positioned as a highly versatile temporary member. Furthermore, if the coupling metal fittings of the present invention are used for handrails, braces, or connection of both handrail frames, the preceding attachment can be performed, and the contribution to the safety of construction of scaffolding etc. is also very high. There are many things.
[Brief description of the drawings]
FIG. 1 is an overall view of a joint fitting according to a first embodiment of the present invention. FIG. 2 is an explanatory view showing a relationship between the joint fitting and a receiving bracket. FIG. 3 is a detailed explanatory view of a wedge in the joint fitting. FIG. 4 is a process diagram showing a procedure for operating the joint metal fitting. FIG. 5 is an overall view of the joint metal fitting according to the second embodiment of the present invention. FIG. 6 is a process diagram showing a work procedure using the joint metal fitting. 7] Schematic diagram of conventional fittings devised by the inventor [Explanation of symbols]
1 metal fitting body 1a insertion claw 1b receiving jaw 1c upper side through hole 1d lower surface side through hole 1e back plate 2, 20 wedge 2a retaining portion (rivet)
2b Inclined edge 2c Inflated curved portion 2d Arc end 2e Vertical edge 2f Step 2g Notch 3 Mounting member 4 Temporary element 5 Connecting member 6 Bracket 6a Inner edge 7 Column

Claims (7)

When constructing a scaffold or the like, it is a coupling 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 column, and can be attached to an end of the temporary element, and A metal fitting body in which a through hole is formed on the upper side provided with a downward insertion claw that can be hooked to the insertion port, and the through hole in a state where the insertion claw of the metal fitting body is hooked to the insertion port. And the through hole is formed on the upper side of the metal fitting body so as to hold the wedge horizontally in a state in which the tip cannot be removed. the receiving rotatable angle adjuster inner edge and in contact with the wedge from the horizontal state to the standing state of the bracket by pulling the bracket body to other party of the wedge provided on the other edge with the angle adjustment unit, the wedge A notch that is engageable with the inner edge of the upper through hole when standing. Temporary for fitting, characterized in that the provided. When constructing a scaffold or the like, it is a coupling 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 column, and can be attached to an end of the temporary element, and A metal fitting body in which a through hole is formed on the upper side provided with a downward insertion claw that can be hooked to the insertion port, and the through hole in a state where the insertion claw of the metal fitting body is hooked to the insertion port. And the through hole is formed on the upper side of the metal fitting body so as to hold the wedge horizontally in a state in which the tip cannot be removed. At the tip of the wedge, there is provided an angle adjusting portion that is capable of rotating the wedge from a horizontal state to an upright state by abutting against the inner edge of the receiving metal by pulling down the metal fitting body. The upper side edge of the U-shaped channel that is larger than the total height Temporary for fitting, characterized in that the opening of the clearance provided with insertion claw into the receiving metal is bent downward to be less than the total height of the receiving metal. The temporary fitting according to claim 1 or 2 , wherein the angle adjusting portion is formed by expanding the tip of the wedge in a curved shape. The temporary fitting according to claim 1 or 2, wherein the angle adjusting portion is formed by bending the tip of the wedge .   The temporary coupling fitting according to any one of claims 1 to 4, wherein the wedge is adjusted so that the center of gravity is positioned closer to the tip.   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 coupling fitting according to claim 5 or 6, wherein the center of gravity is adjusted by a retaining portion.

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