JP2024087201A - Fixtures for stakes - Google Patents

Abstract

To provide a fixing device for stake out that allows easy adjustment of the height and inclination of a stake out board and can be used with the same metal fittings even when the diameter of the stake out pile changes significantly.
[Solution] A batter stake fixing device made of a metal frame body with a V-shaped tip for removably fixing a batter stake plate to a batter stake pile, the device comprising a batter stake pile engaging screw hole formed in the rear part of the frame body, a batter stake pile engaging screw that is inserted into the batter stake pile engaging screw hole and presses and fixes the batter stake inserted into the tip side of the frame body, a screw fastening member extending upright from the upper part of the rear part of the frame body, a batter stake plate engaging screw hole formed in the screw fastening member, and a batter stake plate engaging screw that is inserted into the batter stake plate engaging screw hole and presses and fixes the batter stake plate abutting against the batter stake.
[Selected Figure] Figure 1

Description

The present invention relates to a fixing device for stake out, and in particular to a fixing device for stake out that allows easy adjustment of the height and inclination of the stake out, and that can use piles of different diameters and materials, such as wooden piles or reinforced concrete piles, depending on the construction site.

At civil engineering and construction sites, before or during construction, stake setting work is carried out to determine standards for the height, position, direction, etc. of the structure being constructed. This involves driving multiple piles (stake setting piles) into the ground at regular intervals outside the boundaries defined based on the construction drawings, and then attaching horizontal stake boards, etc. to each pile using a spirit level.

Traditionally, stakes were installed by nailing a wooden board called a stake board (stretching board) to a wooden stake. However, there was a problem in that it was not easy to dismantle a stake that had been nailed down, and it was difficult to reuse the stake or stake board. In addition, because the stake board was fixed with nails, there was a restriction that the stake had to be made of wood.

In addition, as construction progresses, it may become necessary to temporarily remove and reinstall the stake board to adjust its height or inclination angle. However, this requires removing the nails from the stake board, adjusting the height, etc., and then fastening the stake board to the piles again with nails, making this a time-consuming and complicated process.

In addition, since it is not easy to drive wooden stakes into frozen ground surfaces or bedrock, metal stakes (e.g. rebar) are sometimes used instead of wooden stakes. In such cases, nails cannot be used to attach the stake board, so the stake board must be attached to the rebar pile by some means other than nails, and traditionally the stake board has been fixed to the rebar pile with a metal fixing jig. For this reason, many proposals have been made regarding fixing devices for fixing stake boards to rebar piles (e.g. Patent Documents 1 to 3). Below, the technical details of previously proposed fixing devices for stake boards are explained.

Patent document 1 discloses a "survey stake assembly clamp" in which a plate support tube (rectangular box) into which a plate is inserted is fixed in a predetermined direction to a pile support tube into which a pile is fitted, with set screws provided in the pile support tube and nail holes or set screws provided in the plate support tube.

Patent document 2 discloses a stake tensioning device that has a metal or hard resin stake member, a tubular part that fits into the stake member so that it can move up and down, and a register part that is attached perpendicular to the tubular part. This stake tensioning device also discloses a configuration that allows the register part to rotate relative to the stake.

Patent document 3 discloses a stake fixing device that includes a stake plate holding part with a U-shaped cross section that holds the stake plate, a pile holding part connected to the center of the back surface of the holding part, and a connecting part that rotatably connects the two.

However, these patent documents do not suggest any solution to the problem of the present invention described below, namely, to provide a fixing device for stakes that allows the stake plate to be easily removed and attached from the pile in order to adjust the height and inclination of the stake plate, and that can be used even if the diameter of the pile material changes significantly.

Japanese Utility Model Application Publication No. 5-2014 JP 2004-37154 A JP 2018-185189 A

As mentioned above, in civil engineering and construction work, as the work progresses, there are cases where it is necessary to temporarily remove the stake plate and adjust the height and inclination angle of the stake plate. In such cases, the stake plate fixing device described in Patent Document 1 allows the use of reinforced concrete piles, so that piles can be driven into frozen ground surfaces and hard ground, and the stake plate can also be fixed to the reinforced concrete piles using the stake plate fixing device.

However, the fixing of the baffle board to the baffle board must be done by nailing through nail holes formed in the baffle board. This means that in order to adjust the height of the baffle board, it is necessary to remove the nails from the baffle board and then re-nail it, which creates the problem that it is difficult to reuse the baffle board.

The stake tensioning device described in Patent Document 2 can use reinforcing steel piles, so like the stake tensioning fixture in Patent Document 1, it can be used on frozen ground surfaces or hard ground. However, since the stake tensioning plate is held in a tubular portion, and the tubular portion is fastened and fixed to the pile member by a height adjustment screw provided on the stake tensioning device, there is a problem that even if it is desired to fine-tune the height or inclination of the stake tensioning plate, the stake tensioning device itself will come off the pile by loosening the adjustment screw, making it impossible to fine-tune only the stake tensioning plate. There is also the problem that the structure is complex, heavy, and expensive.

The bunk fixing device described in Patent Document 3, like the bunk fixing device in Patent Document 1 and the bunk fixing device described in Patent Document 2, can use reinforcing bar piles, so it can be used on frozen ground surfaces and hard ground. However, because the bunk board is held by a bunk board holding plate formed on the bunk fixing device, there is a problem that only bunk boards that fit within the width of the bunk board holding plate can be used. In addition, the reinforcing bar piles are held by a hollow cylindrical holding plate, but the hollow cylindrical holding plate is connected to the rectangular bunk board holding plate by welding via an auxiliary plate, which results in a problem that the structure is complex, heavy, and expensive. There is also a problem that the bunk board holding plate can come off the welded part and break depending on how it is handled on site.

As mentioned above, the techniques described in Patent Documents 1 to 3 have the problem that they cannot easily accommodate fine adjustments to the height or inclination of the staking boards that arise as construction work progresses, and also have the following problems:

Many types of stakes are used for stake construction, including wooden stakes (round wooden bars), reinforcing bars, steel pipes, iron bars, and hard plastic pipes. Furthermore, stakes with diameters that vary greatly, ranging from about 15 to 60 mm, are often used.

On the other hand, since many stake fixing devices are used at one construction site and are relatively expensive, it is necessary to remove the used stake fixing devices after one construction job is completed and reuse them at other construction sites. The problem with reusing such stake fixing devices is the issue of adaptability to changes in the diameter of the stake piles.

In the prior art, a method for removably attaching a stake fixing device to a stake pile is to insert the stake pile into a tubular member (sheath tube, hereafter referred to as a sleeve) provided on the stake fixing device, and then screw a bolt or thumbscrew into a female-threaded screw hole provided on the side of the sleeve to press and fix it in place. As can be seen in the examples of Patent Documents 1 to 3, the cross-sectional shape of the sleeve is almost always circular.

To use a thick stake, the diameter of the sleeve must be made larger to some extent, but when fixing a large diameter sleeve to a thin stake, the following problems can occur. In other words, for the pressing force of the locking screw to work properly, the axis of the sleeve and the axis of the stake must be aligned. If they are misaligned, the tip of the locking screw will hit the inclined surface of the stake, causing the stake to shift sideways or insufficient tightening force.

In actual on-site work, it is not always easy to align the axis of the sleeve and the pile, which increases the work load (there is a problem of alignment). Also, if the pile is thin compared to the diameter of the sleeve, even if the axis is pressed to align, the tip of the locking screw (usually a thick bolt-shaped screw) is flat, so if a strong lateral force (especially an impact force) acts on the stake fixing device, the pile will shift sideways, the pressing force of the locking screw will no longer work, and the stake fixing device will slip off (there is a problem of lateral shift).

The inventors' experience has shown that if the pile diameter is at least 2/3 the diameter of the sleeve, lateral slippage is not a major problem, but if the pile diameter is less than this, alignment and lateral slippage become major problems. In this way, when the sleeve is cylindrical, the contact surface between the pile and the sleeve is a single point (straight line), so lateral slippage is likely to occur.

Therefore, by changing the cross-sectional shape of the sleeve and changing the state of contact between the sleeve and the pile, it is possible to significantly improve the adaptability of the stake fixing device to changes in pile diameter.

The first objective of the present invention is to provide a stake fixing device that allows easy adjustment of the height and inclination of the stake board and allows the stake board to be reused, i.e., contributes to reducing the labor and resources required for stake installation work and improving work efficiency. ... structure that can accommodate significant changes in the diameter of the stake pile (without problems with alignment or lateral shifting) by improving the structure of the area where the stake fixing device and the stake pile come into contact with each other, in a stake fixing device that fixes a stake board to a stake pile.

In order to solve the above problem, the applicant came up with the following idea. That is, if the cross section of the sleeve through which the pile is inserted is not circular, but has a tapered pentagonal tip, then even if the diameter of the pile is significantly smaller than the sleeve, when the pile is pressed with the stake pile locking screw, the pile will fit into the tapered tip and will not sway sideways. Also, since the pile is supported on both sides of the tip, there is two-point contact, and it will not slip sideways even if a strong lateral force is applied.

The stake plate is placed so that it abuts against the pile that is pressed and fixed with the stake plate locking screw, which presses and fixes the pile, and the stake plate in this state is pressed and fixed with the stake plate locking screw. This allows the stake plate to be fixed to the pile with the stake fixing device and the stake plate to be fixed with the stake fixing device independently, making it easy to make small adjustments to the height and inclination of the stake plate.

The present invention, based on the above concept, is a stake fixing device having a metal frame with a V-shaped tip for removably fixing a stake board to a stake post,
A stake post fastening screw hole formed on the rear surface of the frame body of the frame body, and a stake post fastening screw inserted into the stake post fastening screw hole and pressing and fixing the stake post inserted into the tip side of the frame body;
It is characterized by having a screw-fastening member extending upright from the upper part of the rear portion of the frame body, a screw hole for engaging the baffle board formed in the screw-fastening member, and a baffle board engaging screw that is inserted into the screw hole for engaging the baffle board and presses and fixes the baffle board that abuts against the baffle post.

In the above-mentioned bundling fixture, it is desirable that the horizontal cross section of the frame body is pentagonal, has an axially symmetrical shape with respect to the center line of the horizontal cross section, and that the screw holes for fastening the bundling board and the screw holes for fastening the bundling pile are formed above and below on the vertical center line of the rear part of the frame body.

The present invention relates to a stake fixing device, which is a metal frame-shaped stake fixing device for removably fixing a stake board to a stake post, and
The frame body includes a frame body side portion consisting of a pair of band plates arranged opposite each other at an interval equal to or greater than the diameter of the stake;
The frame body is characterized by having a frame tip portion connected to one end of the frame side portion and having a V-shaped tip, a frame back portion consisting of a strip plate connected to the other end of the frame side portion, a stake pile engagement screw hole formed in the frame back portion, a stake pile engagement screw that is inserted into the stake pile engagement screw hole and presses and fixes the stake pile inserted into the tip side of the frame body, a flat or U-shaped screw fixing member extending to the upper part of the frame back portion, a stake plate engagement screw hole formed in the screw fixing member, and a stake plate engagement screw that is inserted into the stake plate engagement screw hole and presses and fixes the stake plate abutting against the stake.

The horizontal cross section of the frame is a tapered pentagon, and is axially symmetrical with respect to the center line of the horizontal cross section. It is desirable that the screw holes for fastening the stake plate and the screw holes for fastening the stake pile are formed above and below the vertical center line of the rear part of the frame.

The stake fixing device of the present invention allows for easy adjustment of the height and inclination angle of the stake plate, and can contribute to reducing the labor and resources required for stake installation work and improving work efficiency.

Furthermore, when using the stake fixing device of the present invention, the stake pile pressed by the locking screw abuts against both sides of the tip of the V-shaped frame, so there is no concern of it shifting sideways even if a force is applied from the side. Furthermore, if the stake pile is thin, it will penetrate deep into the tip of the V-shaped frame, and if the pile is thick, it will remain in a shallow position. In any case, the stake pressed by the locking screw is fixed on both sides of the tip of the frame, so it can be used without problems even if the diameter of the stake pile changes significantly.

In other words, the ability to accommodate large changes in the diameter of the stake piles is ensured, which means that the stake pile fixing device of the present invention can be applied to any type of stake pile with a single fixing device, greatly expanding the versatility of the stake pile fixing device.

Below, a preferred embodiment of the present invention will be described with reference to the drawings of the embodiment. Figure 1 shows the shape of the fixing device for stakes in this embodiment, with Figure 1(a) being a plan view, Figure 1(b) being a side view, Figure 1(c) being a rear view, and Figure 1(d) being a perspective view.

As shown in the figure, this stake fixing device consists of a frame body 1 and a screw fastening member 2. The frame body 1 has the function of inserting a stake post 10 into its interior and holding the post in place with a stake post locking screw 11.

This frame 1 comprises a pair of frame side sections 3a, 3b arranged opposite each other with a distance equal to or greater than the diameter of the stake (see Figures 2 and 3) (assuming the maximum expected diameter), a frame tip section 4 formed at one end of the frame side sections and having a tapered V-shape when viewed from above, and a frame back section 5 in the form of an upright plate that connects the other ends of both frame side sections and seals them to form a frame (sleeve). In addition, a screw hole 6 for fastening the stake is formed near the center of the frame back section 5.

This frame 1 is formed so that its horizontal cross section is a tapered pentagonal shape, and with the stake 10 fitted inside the tip of the frame, it is pressed and fixed by the stake stake locking screw 11 that screws into the stake stake locking screw hole 6. What is important here is that the pentagonal shape is formed axially symmetrical with respect to the normal line (upright line) that passes through the center of its base (in this case, the frame back part 5). This positions the stake stake 10 so that its central axis coincides with the central axis of the stake stake locking screw 11.

In this embodiment, the frame side portions 3, frame tip portion 4, and frame back portion 5 are all made using strips approximately 20 mm wide and 3 mm thick, which are arranged vertically.
The material constituting the frame 1 does not necessarily have to be a strip plate, except for the frame back portion 5, and may be formed of, for example, a round bar or a square bar. In this embodiment, the pair of frame side portions 3a and 3b are parallel to each other, but this is not necessarily required, and they may be shaped such that the width widens at a slight incline, for example.

The screw-fastening member 2 is a plate-like member with a screw hole, and has the function of pressing and fixing the baffle plate 12 with the baffle plate locking screw 13 that screws into it. The screw-fastening member 2 is a plate-like member that stands upright on the extension of the frame body back part 5 of the frame body 1, and has a baffle plate locking screw hole 7 near its center.

In this embodiment, the screw fastening member 2 has a groove-shaped (C-shaped) cross section, consisting of the frame body flat portion 8 and the raised portions 9 formed on both ends of the frame body flat portion 8. From the viewpoint of stably supporting the baffle plate 12, the height of the frame body flat portion 8 is preferably approximately the same as the width of the baffle plate 12. The thickness of the frame body flat portion 8 should be sufficient to form a female thread that screws into the locking screw.

In this embodiment, the frame body 1 and the screw fastening member 2 are integrally formed, but this is not necessary. The frame body 1 and the screw fastening member 2 may be made separately and joined by means of welding, silver soldering, screw fastening, etc. However, it is preferable that the axes of the screw hole 6 for fastening the stake and the screw hole 7 for fastening the stake plate are arranged in the same vertical plane.

The raised portion 9 (sleeve portion 9) of the screw fastening member 2 in this embodiment is intended to reinforce the frame flat portion 8 against the reaction force of the screw fastening, but is not necessarily required. Also, if necessary, it may be reinforced with a reinforcing material of a different shape.

Figure 2 shows the state in which a stake plate 12 is attached to a stake pile 10 using the stake fixing device of this embodiment, with Figure 2(a) being a plan view and Figure 2(b) being a side view. As can be seen in Figure 2, the stake pile 10 is pressed from behind by a stake pile locking screw 11 (a wing screw is used in this embodiment), and is pressed against the frame body tip 4 of the frame body 1, and is fixed in place by contacting the frame body 1 at two points P1 and P2 shown in Figure 2(a).

As mentioned above, the stake pile 10 is fixed with two points of contact, so there is no risk of lateral displacement. In addition, while the stake plate 12 is placed on the frame body 1, it is pressed from behind by the stake plate locking screw 13 (a wing screw in this embodiment), and is pressed against the surface of the stake pile 10 and fixed in place.

The axis of the screw 13 for fastening the baffle plate is configured to coincide with the central axis of the baffle pile 10 cross section, so the pressing force acts on the axis of the baffle pile 10 cross section. It is also desirable for the tip of this screw to be flat and perpendicular to the axis. This allows the baffle plate 12 to be fixed perpendicular to the axis of the baffle pile 10 without any special angle adjustment.

Furthermore, if the tip of the screw is flat, it has the effect of preventing the baffle board 12, which is pressed against the baffle post 10, from rotating. In the case of a gate-type baffle board, the baffle board is fixed by two or more posts, so there is no problem with rotation. However, in the case of a dragonfly-type baffle board, it is fixed by a single post, so there is a concern that the baffle board 12 may wobble if a force is applied to rotate it around the post.

If the tip of the screw is convex, the board will be supported at one point, which can cause wobbling, but if a thicker locking screw is used and the tip is flat, it will have the same effect as supporting it at two points, and wobbling can be avoided.

Furthermore, although not included in the configuration of this embodiment, by removably attaching a T-shaped or Y-shaped retaining member to the tip of the locking screw so that it does not rotate in conjunction with the screw, it is possible to more reliably prevent the tension plate from wobbling.

Figure 3 is a diagram for explaining the fixing state within the frame when the stake fixing device of the present invention is used for stake piles of different diameters, with Figure 3(a) being for a thin stake pile and Figure 3(b) being for a thick stake pile. Both are horizontal cross-sectional views of the frame at the height of the axis of the stake pile retaining screw 11.

As shown in Figure 3, the stake pile 10 is pressed by the tip of the stake pile locking screw 11, abutting against the inside of both inclined surfaces of the V-shaped frame tip 4 of the frame body, and fixed in place. At this time, the stake pile locking screw hole is provided so that the central axis of the stake pile locking screw 11 coincides with the normal line (upright line) X that passes through the center of the frame back part 5. In addition, both inclined surfaces of the frame tip 4 are formed axially symmetrical with respect to the normal line X.

Therefore, regardless of the thickness of the stake pile 10, it is positioned so that the center line of the pile cross section coincides with the normal line X. In other words, if the stake pile 10 is inserted into the frame body 1 and pressed with the stake pile locking screw 11, the center of the locking screw will abut on the center line of the stake pile 10 cross section without any special alignment operations.

This principle applies equally well to any thickness of stake, making it easy to fasten the stake fixing device to the stake. In this way, one of the important features of the stake fixing device of the present invention is that it automatically holds the center of the stake without the need for special alignment operations.

Figure 4 shows an example of a construction state of a stake setting using the stake setting fixture of the present invention at a civil engineering work site. The stake setting piles 10 are reinforcing bars, and a stake setting plate 12 is hung in a gate shape on two stake setting piles 10. In Figure 4, the stake setting plates 12 are fixed to the stake setting piles 10 in two stages with the stake setting fixture, and the slope of the upper stake setting plate 12 with the ground surface is measured with a level. If the slope angle of the stake setting plate 12 is slightly different, the stake setting plate 12 can be easily adjusted by loosening the stake setting plate locking screw 13 while maintaining the fixation between the stake setting piles 10 and the stake setting fixture.

FIG. 2 is a diagram showing the shape of a stake fixing device according to one embodiment of the present invention. FIG. 2 is a diagram showing the state in which a stake board is attached to a stake pile using a stake fixing device according to one embodiment of the present invention. This is an explanatory diagram of the fixing condition within the frame when a stake fixing device according to one embodiment of the present invention is used on stake piles of different diameters. FIG. 1 is a diagram showing a construction state of setting stakes at a civil engineering work site as an embodiment of the present invention.

1: frame body, 2: screw fastening member, 3a, 3b: frame body side portion, 4: frame body tip portion,
5: Rear part of frame, 6: Screw hole for stake engagement, 7: Screw hole for stake engagement,
8: Frame body flat portion, 9: Rising portion, 10: Stake post, 11: Stake post locking screw,
12: Tie plate, 13: Tie plate retaining screw

The fixing device for stakes of the present invention based on the above idea is a fixing device for stakes made of a metal frame having a V-shaped tip for removably fixing a stake board to a stake pile ,
A stake pile engagement screw hole formed on the rear surface of the frame body of the frame body, and a stake pile engagement screw inserted into the stake pile engagement screw hole and pressing and fixing the stake pile inserted into the tip side of the frame body;
It is characterized by having a screw-fastening member extending upright from the upper part of the rear portion of the frame body, a screw hole for engaging the baffle board formed in the screw-fastening member, and a baffle board engaging screw that is inserted into the screw hole for engaging the baffle board and presses and fixes the baffle board that abuts against the baffle post.

The present invention relates to a stake fixing device, which is a metal frame-shaped stake fixing device for removably fixing a stake board to a stake pile , and
The frame body includes a frame body side portion consisting of a pair of band plates arranged opposite each other at an interval equal to or greater than the diameter of the stake;
The frame body is characterized by having a frame tip portion connected to one end of the frame side portion and having a V-shaped tip, a frame back portion consisting of a strip plate connected to the other end of the frame side portion, a screw hole for engaging a stake pile formed in the frame back portion, a stake pile engaging screw that is inserted into the stake pile engaging screw hole and presses and fixes the stake pile inserted into the tip side of the frame body, a flat or U-shaped screw fixing member extending to the upper part of the frame back portion, a stake plate engaging screw hole formed in the screw fixing member, and a stake plate engaging screw that is inserted into the stake plate engaging screw hole and presses and fixes the stake plate abutting against the stake.

Claims (3)

A stake fixing device having a metal frame with a V-shaped tip for removably fixing a stake board to a stake pile,
A stake post fastening screw hole formed on the rear surface of the frame body of the frame body, and a stake post fastening screw inserted into the stake post fastening screw hole and pressing and fixing the stake post inserted into the tip side of the frame body;
A stake fixing device characterized by comprising a screw-fastening member extending upright from the upper part of the rear portion of the frame body, a screw hole for engaging a stake plate formed in the screw-fastening member, and a stake plate engaging screw that is inserted into the screw hole for engaging the stake plate and presses and fixes the stake plate that abuts against the stake post. The fixing device for stakes described in claim 1, characterized in that the horizontal cross section of the frame body is a tapered pentagon, has an axially symmetrical shape with respect to the center line of the horizontal cross section, and a screw hole for fastening the stake board and a screw hole for fastening the stake pile are formed above and below on the vertical center line of the rear part of the frame body. A metal frame fixing device for removably fixing a stake board to a stake pile,
The frame body includes a frame body side portion consisting of a pair of band plates arranged opposite each other at an interval equal to or greater than the diameter of the stake;
a frame tip portion connected to one end of each of the frame side portions and having a V-shaped tip;
a frame back portion of a band plate connected to the other end of each of the frame side portions;
A stake pile engagement screw hole formed in the rear part of the frame body, a stake pile engagement screw inserted into the stake pile engagement screw hole and pressing and fixing the stake pile inserted into the tip side of the frame body, and a flat or U-shaped screw fastening member extending to the upper part of the rear part of the frame body;
A stake fixing device characterized by comprising a screw hole for engaging a stake plate formed in the screw fastening member, and a stake plate engaging screw that is inserted into the screw hole for engaging the stake plate and presses and fixes the stake plate that abuts against the stake post.

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