Formwork separator folding and cutting tool and formwork separator folding and cutting method

Abstract

To provide a novel and highly practical formwork separator folding and cutting tool and a formwork separator folding and cutting method.SOLUTION: There is provided a formwork separator folding and cutting tool for folding and cutting a formwork support portion 50a, which supports a formwork 70 for forming a rising base portion 60a, of a formwork separator 50. The tool has a handle 10 at the tip of which is provided with a separator holding portion 1, which is made up of a lower holding member 2 inserted and positioned below the formwork support portion 50a, and right and left holding members 3 positioned on the right and left sides of the formwork support portion 50a.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a tool for folding and cutting a separator for a formwork and a method for folding and cutting a separator for a formwork. [Background technology]

[0002] In recent years, construction work for residential foundations has mainly focused on the use of metal formwork 70 known as steel formwork. For example, when constructing a concrete foundation 60 (commonly known as a mat foundation or a strip footing) in which a rising foundation section 60a is provided on top of a base foundation section 60b, the formwork 70 that forms the rising foundation section 60a is positioned using a formwork separator 50 (see Figure 5). As shown in Figure 11, this formwork separator 50 has formwork support sections 50a that support the formwork 70 in an upright position and are integral with both ends of a base section 50b made of metal plate material. Note that a weak groove section 50c (thin section) is provided in the formwork separator 50 where the base section 50b and the formwork support section 50a are connected.

[0003] When actually constructing a concrete foundation 60 (rising foundation portion 60a) using this form separator 50, multiple form separators 50 are arranged side by side on the upper surface of the base foundation portion 60b at the portion where the rising foundation portion 60a is to be constructed (arranged side by side at equal intervals along the length of the rising foundation portion 60a), a form 70 is supported by the form support portions 50a of each form separator 50, and concrete is poured into the form 70 in this state to form the rising foundation portion 60a. Note that before pouring the concrete that makes up the rising foundation portion 60a, rebar embedded in the base foundation portion 60b protrudes from the surface of the base foundation portion 60b on which the form separators 50 are arranged side by side.

[0004] After the formwork 70 has been removed, the formwork support portion 50a of the formwork separator 50 is exposed, protruding horizontally from the surface of the rising base portion 60a (the base portion 50b is buried within the rising base portion 60a). Leaving it in this state would not only look bad, but would also get in the way of other work, so the formwork support portion 50a is removed by breaking and cutting it at the weak groove portion 50c using a tool such as a crowbar. However, since a large number of formwork separators 50 are sometimes used at just one construction site, squatting down to remove them one by one is a lot of work and takes a lot of time.

[0005] Therefore, in the past, a formwork separator folding and cutting tool (hereinafter referred to as the "prior art") has been proposed as disclosed in Patent Document 1 in order to simplify folding and cutting of the formwork support portion 50a, which is exposed and protrudes horizontally from the surface of the rising base portion 60a.

[0006] As shown in Figure 12, this conventional example has a grip 30 with a predetermined length, and is provided at the lower tip thereof with a locking claw 31 that locks onto the tip (locked portion 81) of the rising portion 80a' of the formwork support portion 80a provided on both sides of a formwork separator 80 exclusive to the conventional example, and a grounding portion 32 provided at the base end of this locking claw 31. This locking claw 31 is locked onto the locking portion 81 of the rising portion 80a' to ground the grounding portion 32, and by swinging the grip 30 downward (swinging), the formwork support portion 80a is twisted with the grounding portion 32 as a fulcrum (see Figure 13), and the formwork support portion 80a is broken at the weakened groove 80c provided on the underside. The original function of the engaging portion 81 is to bend inward to prevent the formwork 70 from floating up, but in the conventional example, it is used to bend and cut the formwork support portion 80a, and when bending and cutting the formwork support portion 80a, the engaging portion 81 bent inward is raised and then the engaging claw portion 31 is engaged. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-100350 Summary of the Invention [Problem to be solved by the invention]

[0008] As a result of further research and development into the aforementioned formwork separator folding and cutting tool, the inventor has invented a highly practical formwork separator folding and cutting tool and a formwork separator folding and cutting method that have never been seen before. [Means for solving the problem]

[0009] The gist of the present invention will be explained with reference to the accompanying drawings.

[0010] This is a formwork separator folding and cutting tool for folding and cutting the formwork support portion 50a of a formwork separator 50, which has a formwork support portion 50a that supports a formwork 70 for forming a rising foundation portion 60a, and is characterized in that the tip of the handle 10 is provided with a separator holding portion 1 consisting of a lower holding member 2 that is inserted and positioned below the formwork support portion 50a, and left and right holding members 3 that are positioned on the left and right sides of the formwork support portion 50a.

[0011] In addition, the present invention relates to a formwork separator folding and cutting tool as described in claim 1, characterized in that the distance between the front inner surfaces 3a of the left and right holding members 3 is configured so that the distance between them becomes wider as they move further forward.

[0012] The present invention also relates to a formwork separator folding and cutting tool as described in any one of claims 1 and 2, characterized in that the front end of the lower holding member 2 is tapered, and the upper surface 2a of the lower holding member 2 is an upwardly curved inclined surface or an upwardly inclined surface toward the rear.

[0013] The present invention also relates to a formwork separator folding and cutting tool as described in any one of claims 1 and 2, characterized in that the handle 10 is provided with a gripping portion 11 having a length in a direction intersecting the longitudinal direction of the handle 10.

[0014] The present invention also relates to a formwork separator folding and cutting tool as described in claim 3, characterized in that the handle 10 is provided with a gripping portion 11 having a length in a direction intersecting the longitudinal direction of the handle 10.

[0015] The present invention also relates to a method for folding and cutting the formwork support portion 50a of the formwork separator 50 using the formwork separator folding and cutting tool described in claim 1, characterized in that the lower holding member 2 of the separator holding portion 1 is inserted and positioned below the formwork support portion 50a, the handle 10 is rotated around its axis, and the left and right holding members 3 clamp the left and right sides of the formwork support portion 50a, thereby twisting and folding and cutting the formwork support portion 50a. [Effects of the Invention]

[0016] Because the present invention is configured as described above, it is possible to easily and quickly fold and cut form support parts, and it is applicable to many types of form separators, making it an unprecedented and very practical form separator folding and cutting tool. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a perspective view showing the present embodiment. [Figure 2] FIG. 2 is a perspective view showing a main part according to the present embodiment. [Figure 3] FIG. 2 is a front view showing the main part according to the present embodiment. [Figure 4] FIG. 2 is a side view showing a main part according to the present embodiment. [Figure 5] FIG. 2 is an explanatory diagram of the use state of the present embodiment. [Figure 6] FIG. 2 is an explanatory diagram of the use state of the present embodiment. [Figure 7] FIG. 2 is an explanatory diagram of the use state of the present embodiment. [Figure 8] FIG. 2 is an explanatory diagram of the use state of the present embodiment. [Figure 9] FIG. 2 is an explanatory diagram of the use state of the present embodiment. [Figure 10] FIG. 2 is an explanatory diagram of the use state of the present embodiment. [Figure 11] FIG. 2 is a perspective view showing a form separator 50. [Figure 12] FIG. 10 is a perspective view showing a conventional example and a form separator 80 dedicated to the conventional example. [Figure 13] FIG. 10 is an explanatory diagram of a conventional example in use. DETAILED DESCRIPTION OF THE INVENTION

[0018] A preferred embodiment of the present invention will be briefly described below, illustrating the operation of the present invention with reference to the drawings.

[0019] For example, when the lower holding member 2 is inserted and placed below the form support part 50a, the left and right holding members 3 are placed on the left and right sides of the form support part 50a, and the form support part 50a is held by the separator holding part 1. In this state, for example, when the handle 10 is operated to rotate the separator holding part 1, the form support part 50a is twisted and broken.

[0020] Therefore, it can be applied to any type of form separator 50, regardless of whether or not the form support portion 50a has an engaging portion as in the conventional example described above, and the form support portion 50a of the form separator 50 can be easily and quickly folded and cut while standing in a comfortable position. [Example]

[0021] Specific embodiments of the present invention will be described with reference to the drawings.

[0022] This embodiment is a form separator folding and cutting tool that folds and cuts the form support portion 50a of a form separator 50 that has a form support portion 50a that supports a form 70 for forming a rising base portion 60a.

[0023] In this embodiment, the target form separator 50 is a form separator 50 of a known structure used when constructing a concrete foundation 60 (commonly known as a slab foundation or a strip foundation) in which a rising foundation portion 60a is provided on the top surface of the base foundation portion 60b described above. Specifically, as shown in Figure 11, it is made of metal plate material and has a base portion 50b and form support portions 50a integrally connected to both left and right ends of this base 50b via weak groove portions 50c (thin portions). This form support portion 50a is made up of an outer rising portion 50a' formed by bending the end of the metal plate material upward, and an inner rising portion 50a" formed by cutting and raising at an opposing position near the center of this outer rising portion 50a' (a position separated by a gap equal to the thickness of the formwork 70). Furthermore, a weak groove portion 50c is provided in a position near the inner rising portion 50a".

[0024] Each component of this embodiment will be described in detail below.

[0025] In this embodiment, a separator holding portion 1 for holding a form support portion 50 a of a form separator 50 is provided at the tip of a handle 10 .

[0026] This separator holding portion 1 is composed of a lower holding member 2 inserted and disposed below the form support portion 50a, and left and right holding members 3 disposed on the left and right sides of the form support portion 50a.

[0027] The lower holding member 2 is a plate-like body formed from an appropriate metal member as shown in Figures 1 to 4, and is square in plan view and S-shaped in side cross section, and is wider than the width of the formwork support part 50.The base end of this lower holding member 2 is configured as a connecting part that is welded to the tip of the handle 10.

[0028] The front end (edge) of the lower holding member 2 is tapered in the thickness direction (like the blade of a scraper, tapering toward the tip), and the upper surface 2a of the lower holding member 2 is curved upward and inclined toward the rear relative to the lower surface 2b (ground contact surface).The lower surface 2b of the lower holding member 2 is a smooth surface with no irregularities.

[0029] Therefore, the lower surface 2b of the lower holding member 2 is slid over the upper surface of the base foundation portion 60b (described later), and the lower holding member 2 is smoothly inserted into the gap between the upper surface of the base foundation portion 60b and the underside of the formwork support portion 50a, and as a result of this insertion, the formwork support portion 50a is bent upward from the weakened groove portion 50c along the upper surface 2a (in this state, the left and right holding members 3 are placed in opposing positions on the left and right sides of the formwork support portion 50a.) The upper surface 2a of the lower holding member 2 may be an upwardly sloping surface facing rearward relative to the lower surface 2b.

[0030] In addition, each of the left and right end portions of the lower holding member 2 is provided with a screw hole (not shown) into which a bolt member 4 is screwed to secure the left and right holding members 3 in an upright position, making the left and right holding members 3 freely attachable and detachable to the lower holding member 2.

[0031] The left and right holding members 3 are rectangular plate-like bodies formed from appropriate metal members as shown in Figures 1 to 4, and are detachably attached to the left and right side portions of the lower holding member 2 via bolt members 4, and are installed in an upright state at the left and right end portions of the lower holding member 2 with a gap between them.

[0032] Furthermore, the left and right side holding members 3 may be integrally molded with the lower holding member 2, or may be configured to protrude from the tip of the handle 10 rather than from the lower holding member 2, as long as they are erected on the left and right parts of the lower holding member 2 and positioned opposite the left and right sides of the formwork support portion 50a arranged on the upper surface 2a of the lower holding member 2 to hold the left and right sides of the formwork support portion 50a.

[0033] The distance between the front inner surfaces 3a of the left and right holding members 3 is configured to be a V-shape in which the distance increases toward the front, and in this embodiment, this configuration is achieved by providing bent portions (curved portions) in the left and right holding members 3. The front inner surfaces 3a of the left and right holding members 3 may also be configured to be inclined surfaces (tapered surfaces).

[0034] Therefore, the front inner surfaces 3a of the left and right holding members 3 function as guiding surfaces, making it possible to easily and reliably guide and arrange the formwork support portion 50a between the inner surfaces 3b of the left and right holding members 3.

[0035] The interval between the inner surfaces 3b (retaining surfaces) of the portions connected to the rear of the front inner surface 3a is set to be slightly wider than the width of the form support portion 50a.

[0036] The spacing between the left and right side retaining members 3 is set so that there is a slight gap between the left and right sides of the formwork support part 50a, to allow for ease of placement on the formwork support part 50a and to accommodate various types of formwork separator 50 sizes, without interfering with the folding and cutting work.

[0037] The handle 10 is a round rod-shaped body made of an appropriate metal material as shown in Figures 1 to 4, and the length from the grip part 11 (described later) to the connecting part with the separator holding part 1 is set to approximately 1 m.

[0038] The grip 10 has a T-shaped grip portion 11 at its base end.

[0039] Specifically, as shown in FIG. 1, the grip portion 11 is formed by welding the longitudinal center of a round rod-shaped body made of an appropriate metal member to the upper base end of the grip 10, and is configured to have a length in a direction intersecting the longitudinal direction of the grip 10.

[0040] Grips 11a made of synthetic resin are fitted and connected to the left and right sides of the grip portion 11.

[0041] Therefore, the operation of gripping the grip portion 11 and rotating the grip handle 10 around its axis can be easily performed.

[0042] The grip portion 11 is not limited to a T-shape, but may have other shapes (for example, an L-shape or a ring shape).

[0043] The following describes a method for folding and cutting form separators using the form separator folding and cutting tool according to this embodiment, which is configured as described above. Note that the form separators 50 and concrete foundations 60 to be used are not limited to those described in this embodiment.

[0044] First, the separator holding portion 1 holds the form support portion 50a.

[0045] Specifically, the worker holds the handle 11 (left and right grips 11a) with both hands in front of the body, and in this state slides the underside 2b of the lower holding member 2 over the top surface of the base foundation part 60b, and forcefully inserts the front end of the lower holding member 2 between the underside of the formwork support part 50a and the top surface of the base foundation part 60b from the longitudinal side of the formwork support part 50a, causing the formwork support part 50a to bend from the weak groove part 50c (rising up by sliding up the upper surface 2a, which is the upward curved inclined surface of the lower holding member 2), and enters a state of being held by the separator holding part 1 (the lower holding member 2 is positioned below the formwork support part 50a, and the left and right holding members 3 are positioned on the left and right sides of the formwork support part 50a) (see Figures 5, 6 and 7). Furthermore, if the degree of insertion (holding of the separator holding part 1 against the formwork support part 50a) in a single insertion operation is not sufficient, the separator holding part 1 is repeatedly moved back and forth to gradually raise the formwork support part 50a until the separator holding part 1 is sufficiently held against the formwork support part 50a.

[0046] Next, the separator holding portion 1 is rotated to break and cut the form support portion 50a held by the separator holding portion 1.

[0047] Specifically, when the worker rotates (swings) the gripping portion 11 (left and right grips 11a) held in front of his body back and forth in the left and right directions (clockwise and counterclockwise) to rotate the grip handle 10 around its axis, the left and right sides of the formwork support portion 50a are clamped between the left and right holding members 3, causing the formwork support portion 50a to twist left and right and be severed from the weak groove portion 50c (see Figures 8, 9, and 10). Note that this axial rotation of the grip handle 10 is performed by the left and right parts of the underside of the lower holding member 2, which is in contact with the base foundation portion 60b, alternately coming into contact with the base and acting as a fulcrum.

[0048] Therefore, according to this embodiment, it can be applied to any type of form separator 50, regardless of whether or not the form support portion 50a has an engaging portion as in the conventional example described above, and the form support portion 50a of the form separator 50 can be easily and quickly folded and cut while standing in a comfortable position.

[0049] In addition, in this embodiment, the distance between the front inner surfaces 3a of the left and right holding members 3 is configured so that the distance between them becomes wider the further forward, so that the holding of the separator holding portion 1 relative to the formwork support portion 50a (the work of guiding and arranging the formwork support portion 50a between the inner surfaces 3b of the left and right left holding members 3) can be performed easily and reliably.

[0050] In addition, in this embodiment, the front end of the lower holding member 2 is tapered, and the upper surface 2a of the lower holding member 2 is formed as an upwardly curved inclined surface or an upwardly inclined surface toward the rear, so that in this respect too, the holding of the separator holding portion 1 relative to the formwork support portion 50a (the work of guiding and arranging the formwork support portion 50a between the inner surfaces 3b of the left and right holding members 3) can be performed easily and reliably.

[0051] In addition, in this embodiment, the grip 10 is provided with a grip portion 11 having a length in a direction intersecting the longitudinal direction of the grip 10, which allows the grip 10 to be easily rotated about its axis.

[0052] The present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate. [Explanation of symbols]

[0053] 1 Separator holder 2 Lower holding member 2a Top side 3 Left and right holding members 3a Front inner surface 10 Grip handle 11 Grip part 50 Formwork separator 50a Formwork support part 60a Rising base 70 Formwork

Claims

1. A form separator folding and cutting tool for folding and cutting a form separator provided with a form support portion that supports a form for forming a rising foundation portion, characterized in that the form separator has a separator holding portion at the tip of the handle, which consists of a lower holding member that is inserted and positioned below the form support portion, and left and right holding members that are positioned on the left and right sides of the form support portion.

2. 2. The formwork separator folding and cutting tool according to claim 1, wherein the distance between the front inner surfaces of the left and right holding members is configured so that the distance between the front inner surfaces increases toward the front.

3. 3. A formwork separator folding and cutting tool as claimed in claim 1, characterized in that the front end of the lower holding member is tapered, and the upper surface of the lower holding member is an upwardly curved inclined surface or an upwardly inclined surface facing rearward.

4. 3. A formwork separator folding and cutting tool according to claim 1, wherein the handle is provided with a gripping portion having a length in a direction intersecting the longitudinal direction of the handle.

5. 4. A formwork separator folding and cutting tool according to claim 3, wherein said grip is provided with a gripping portion having a length in a direction intersecting with the longitudinal direction of said grip.

6. 2. A method for folding and cutting a form support portion of a form separator using the form separator folding and cutting tool described in claim 1, characterized in that the lower holding member of the separator holding member is inserted and positioned below the form support portion, the handle is rotated around its axis to clamp the left and right sides of the form support portion with the left and right holding members, and the form support portion is twisted and folded and cut.

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