JPH024202Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention provides
When assembling concrete formwork, it is important to configure the engagement relationship between the spacing rods that maintain the spacing and the formwork clamping fittings in the best condition, and when dismantling the formwork after the poured concrete has hardened. This invention relates to a concrete formwork tightening device characterized in that it is constructed so that the spacing rods used in the concrete formwork can be easily and quickly removed from the formwork.

In other words, as shown in Figure 1 of the attached drawings, the conventionally used concrete formwork spacing rods are difficult to use when engaging with the engaging portion of the concrete formwork clamping fitting through the insertion hole drilled in the formwork. The method involves assembling a formwork by engaging the semicircular heads formed at both ends of the formwork spacing rod with the engaging parts of the concrete formwork clamping fittings, and then placing concrete between the concrete formworks. After pouring and concrete hardening, the formwork is removed from the concrete surface by releasing the engagement between the formwork spacing rod and the formwork clamping fittings, and then inserting the formwork into the insertion hole of the formwork to maintain the formwork spacing. It is necessary to remove the head of the rod from the formwork, but during this removal work, as shown in Figure 2 of the attached drawing, the inside horizontal of the semicircular head of the end of the formwork spacing rod The problem was that the concrete formwork retaining rods were caught in the ends of the through holes of the formwork, making it difficult to remove them from the formwork. In particular, the reality is that several formwork holding rods are inserted through veneer formwork, and a huge amount is used when constructing a structure, so removing them can cause damage to the formwork. There were flaws that were connected. The present invention is a concrete formwork tightening device devised to solve the above-mentioned problems, and examples of its configuration and effects will be described below with reference to the accompanying drawings. Figure 1 is a side view showing a conventionally commonly used formwork spacing retaining rod A'. In the figure, 1' is the engaging part that engages with the concrete formwork clamping fitting, and the concrete formwork spacing is Both ends of the holding rod A' are formed in a semicircular shape, and 2' is the inner horizontal part of the semispherical engaging part 1'. Figure 2 is a diagram showing the state in which the concrete formwork is removed from the head of the conventional concrete formwork spacing rod A'.
In the figure, B shows the concrete formwork, 3 shows the insertion hole drilled in the formwork B, and C shows the poured concrete. Figure 3 shows the concrete formwork used in the concrete formwork tightening device of the present invention. This is a side view showing the holding rod A, and 1 in the figure is an engaging part that engages with each concrete formwork tightening fitting that together constitute the present invention, which will be described later, and is constructed at both ends of the concrete formwork spacing holding rod A. In particular, a diagonal straight portion 2 is formed on the side surface of the concrete form spacing retaining rod A connected to the main body, and the upper end thereof is formed into a semicircular shape to constitute an engaging portion 1. Also, a stopper 4 is provided on the center side from the engaging portion 1.
The bearing washer 5 which is locked by is loosely fitted,
Supports concrete formwork B. Further, a flat portion 6 is formed at the center of the concrete form spacing rod A to prevent the concrete form spacing rod A from rotating in the hardening concrete.
Figure 4 shows concrete form spacing retaining rod A of the present invention.
FIG. 2 is an enlarged partial view of the engaging portion 1 of FIG. FIG. 5 is a side sectional view showing a tightening device for a concrete form spacing retaining rod A and a concrete form fastening fitting D, which is one of the embodiments, constituting the concrete form tightening device of the present invention. Figure 6 is a partial cross-sectional view taken along the - line in Figure 5. In other words, the concrete formwork fastening bracket D, which constitutes the present invention shown in Figures 5 and 6, is made of a band-shaped iron plate and has a U-shape. The inner outer surface 7 is provided with a narrow vertical hole 8 into which the concrete form spacing retaining rod A is inserted, and the inner inner surface 9 is provided with a diagonal hole 8 of the engaging portion 1 of the concrete form spacing retaining rod A. The guide part 10 having an inverted U-shaped oblique straight part is welded and fixed so that the straight part 2 engages with the guide part 10. In the diagram, E is the vertical frame material, F is the horizontal frame material, and C
shows the wedges. FIG. 7 is a side sectional view showing a tightening device for a concrete form spacing retaining rod A and a concrete form fastening fitting D', which is one of the embodiments, constituting the concrete form tightening device of the present invention.
FIG. 8 is a partial end view taken along the - line in FIG. 7. That is, the concrete formwork clamp D' used in the concrete formwork clamping device shown in FIGS. The pressing part 13 is provided with a narrow vertical hole 14 into which the concrete formwork spacing rod A is inserted from below to the top, and a tightening fitting is connected to the formwork pressing part 13. In this configuration, the engaging portion with which the diagonal straight portion 2 of the engaging portion 1 of the concrete form holding rod A on the side of the main body 12 abuts and engages is the diagonal portion 15 . In addition, H in the figure indicates a washer. Figure 9 shows the concrete formwork spacing holding rod A that constitutes the concrete formwork tightening device of the present invention.
and concrete formwork holding fittings, which is one of the examples
D" is a side sectional view showing the tightening device. FIG. 10 is a partial end view taken along the - line in FIG. D'' is constructed of a strip of iron plate in a so-called U-shape with an open outer side, and a narrow vertical hole 8' into which the concrete form spacing retaining rod A is inserted is provided on the inner outer surface part 7' of the steel plate. A guide part 10' having an inverted U-shaped diagonal part that engages with the diagonal straight part 2 of the engaging part 1 of the concrete form spacing retaining rod A is welded and fixed to the inner surface part 9'. It is. Next, the operation and effect of the concrete formwork tightening device of the concrete formwork tightening device of the present invention will be explained. That is, the concrete form spacing retaining rod A that acts on the structure of the concrete form tightening device of the present invention is attached to both ends of the concrete form spacing retaining rod A, as shown in Figures 3 and 4 in the attached drawings. A diagonal linear part is formed on the side surface connected to the main body, and the upper end thereof is formed into a semicircular shape to constitute an engaging part 1. A support washer 5 is loosely fitted to support the concrete formwork B which is stopped by the stopper 4, and a flat support washer 5 is fitted to the concrete formwork spacing rod A to prevent it from rotating in the concrete when the concrete hardens. A portion 6 is formed. In addition, the functions and effects of the concrete formwork clamping brackets D, D', and D'', which together with the concrete formwork spacing retaining rod A constitute the concrete formwork clamping apparatus of the present invention, are as follows. That is, as shown in Figures 5 and 6 of the attached drawings, the engaging part 1 of the concrete form spacing rod A is inserted into the insertion hole 3 drilled in the concrete form B, and the concrete form is inserted into the concrete form. The engaging part 1 of the frame spacing retaining rod A is inserted into the narrow vertical hole 8 of the inner outer surface part 7 of the concrete formwork fastening metal fitting D, which is configured in a U-shape, and the concrete formwork fastening metal fitting D is inserted. When pressed downward from above, the engaging portion 1 of the concrete form spacing retaining rod A will engage the inner inner surface 9 of the concrete form clamping bracket D.
The concrete formwork retaining rod A moves upward in the formwork clamping fitting D while the guide part 10 having an inverted U-shaped oblique straight part welded and fixed to the horizontal line moves upward. Let it reach its peak. As a result, concrete formwork B is connected to concrete formwork spacing rod A.
It is firmly held between the support washer 5 which is loosely fitted into the concrete formwork clamping fitting D,
After that, press the vertical frame member E against the concrete formwork B, insert the horizontal frame member F into the U-shaped concrete formwork tightening fitting D, and insert the wedge G into the wedge hole 11. Inserting it and pressing the horizontal flap member F forward completes the construction of the concrete formwork tightening device. Further, an embodiment of the tightening device with the concrete formwork clamping fitting D' which constitutes the concrete formwork tightening device of the present invention together with the concrete formwork spacing rod A is as follows.
That is, as shown in FIGS. 7 and 8 of the attached drawings,
A formwork in which the engaging part 1 of the concrete formwork spacing retaining rod A is inserted into the insertion hole 3 of the concrete formwork B, and the engaging part 1 is connected to the front end of the concrete formwork clamping fitting D'. Insert from below into the narrow vertical hole 14 of the pressing part 13, and attach the concrete formwork tightening metal fitting.
When D' is pushed down, the diagonal straight portion 2 of the engaging portion 1 of the concrete form spacing retaining rod A and the engaging portion having the diagonal portion 15 of the formwork pressing portion 13 are engaged with each other. It is firmly held. With this, concrete formwork B is attached to the concrete formwork clamping bracket.
It is held between the pressing part 13 of D' and the support washer 5 of the concrete formwork spacing rod A, and the vertical frame member E and the wedge hole 1 of the concrete formwork fastening fitting main body 12
A wedge G is inserted into 1, and the horizontal beam member F is pressed forward by a washer H to complete the construction of the concrete form tightening device. In addition, the embodiment of the tightening device with the concrete formwork clamping bracket D'', which constitutes the concrete formwork clamping device of the present invention together with the concrete formwork spacing rod A, is the same as the embodiment of the concrete formwork clamping bracket D described above. It has a similar configuration, and the concrete formwork fastening bracket D″ is shown in attached drawings Figures 9 and 10.
Concrete formwork fasteners as shown in the figure.
A guide part 10' having an inverted U-shaped oblique part is welded and fixed to the U-shaped inner inner surface part 9' of D'', and the engaging part 1 of the concrete form spacing rod A is constructed. The engagement with the diagonal straight portion 2 is more firmly engaged.As explained above, the concrete form spacing rod used in the structure of the concrete form tightening device of the present invention is Since the continuous side surfaces are configured as diagonal straight parts, when the concrete formwork is peeled off from the concrete surface after the concrete has hardened and the formwork is removed from the engagement part of the concrete formwork spacing rod, The inner surface of the insertion hole of the formwork is guided by the oblique straight portion formed in the engagement part of the concrete formwork spacing rod, and the engagement part of the concrete formwork spacing rod is centered in the insertion hole. This makes it possible to easily remove the concrete formwork from the concrete formwork spacing retaining rod.Furthermore, the concrete formwork, which together with the concrete formwork spacing retaining rod constitutes the concrete formwork tightening device of the present invention. As explained in each embodiment, the tightening fitting has a guide part having an inverted U-shaped cross section with a diagonal straight part, and a formwork pressing part. Since the guide part that engages with the formwork spacing retaining rod in the section is configured as a diagonal straight part, when concrete is poured between the formworks, a pressing force is generated against the concrete formwork, and as a result,
A tensile force is applied to the engagement between the engaging part of the concrete formwork spacing rod and the concrete formwork fastening fitting, but even in such cases, the diagonal Due to the engagement between the straight part and the diagonal straight part formed in the guide part of each of the concrete formwork clamping fittings, the engagement state will not be bitten, so separation from the concrete formwork interval retaining rod is prevented. Also, it is possible to easily and quickly separate it from the concrete formwork clamping fittings.
Therefore, since the concrete formwork tightening device itself can be used repeatedly, it is economically effective, and as a result, the concrete formwork tightening device has various practical effects such as saving materials. It is.

[Brief explanation of drawings]

Figure 1 is a side view of a conventional concrete form spacing rod. FIG. 2 is a partially enlarged view showing the state in which the formwork is removed from the head of the holding rod. Figure 3 is a side view of the concrete form spacing rod used in the proposed tightening device. FIG. 4 is an enlarged partial side view of a portion of the retaining rod. FIG. 5 is a side sectional view showing the tightened state of the holding rod and the tightening fitting of the present invention. FIG. 6 is a partial end view taken along the - line in FIG. 5. FIG. 7 is a side sectional view showing another embodiment of the present invention. FIG. 8 is a partial end view taken along the - line in FIG. 7. FIG. 9 is a side sectional view showing another embodiment of the present invention. FIG. 10 is a partial end view taken along the - line in FIG. 9. 1, 1'...Engagement part, 2...Diagonal straight part, 2'...
...Inner horizontal part, 3...Insertion hole, 4...Stopper, 5...Support washer, 6...Flat part, 7, 7'...
...Inner outer surface part, 8, 8'...Narrow vertical elongated hole, 9,
9'... Inner inner surface part, 10, 10'... Guide part, 1
1, 11'...Wedge hole, 12...Tightening fitting body, 1
3... Formwork pressing part, 14... Narrow vertical elongated hole, 15...
...Diagonal straight section, A, A'...Concrete formwork spacing rod, B...Concrete formwork, C...Concrete, D, D', D''...Concrete formwork tightening bracket, E...Vertical Frame material, F...Horizontal material, G
...Wedge, H...Washer.

Claims (1)

[Claims for Utility Model Registration] (1) When tightening concrete formwork, a diagonal straight part is formed at both ends of the formwork spacing retaining rod on the side surface that is continuous with the main body, and the upper end part is cut in half. A concrete formwork comprising an engaging part formed in a circular shape and engaging and tightening a formwork clamping fitting having an internal structure having a diagonal straight part that engages with the engaging part. Tightening device. (2) When tightening concrete formwork, an engaging part is formed on both ends of the formwork spacing retaining rod, with a diagonal straight part formed on the side surface connected to the main body, and the upper end thereof formed in a semicircular shape. The engaging part is connected to a guide part having an inverted U-shaped oblique straight part welded and fixed to the inner inner surface of the U-shaped fastening fitting having a narrow vertical hole on the inner outer surface. The concrete form tightening device according to claim 1 of the registered utility model claim, characterized in that the device performs joint tightening. (3) When tightening concrete formwork, an engaging part is formed on both ends of the formwork spacing retaining rod, with a diagonal straight part formed on the side surface connected to the main body, and the upper end thereof formed in a semicircular shape. , a narrow vertical elongated hole is provided on the outside of the formwork pressing part that is connected to the engagement part and the front end of the formwork clamping body, and an oblique straight part is formed on the inside of the engagement part. A concrete formwork tightening device according to claim 1, characterized in that the device engages and tightens the concrete formwork.