JP2013136913A - Foundation for outdoor unit installation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a foundation for outdoor unit installation which is immune to the earthquake, can be installed even in a narrow place, is small-sized and lightweight, can be manufacture at low cost and can be constructed alone.SOLUTION: A concrete foundation body 1 is fixed on an installation panel 14 and a horizontal adjuster plate 13 by a spiral anchor 5, and a unit 19 is installed on the fixed foundation body 1. Thus, since the foundation body 1 is fixed on the ground by the spiral anchor 5, bearing ability to pulling-out is improved, the foundation is immune to shakes during the earthquake, is small-sized and lightweight, reduces manufacturing costs and can be constructed even alone.

Description

  The present invention relates to a foundation for outdoor equipment installation used for outdoor equipment such as air conditioning equipment or hot water supply equipment, fuel cells, boilers, etc. under the eaves of a building and where the equipment location is soil.

  When installing outdoor equipment on the soil under the eaves, the ground is not stable, and outdoor equipment is usually 20 kg or more, and large items such as boilers are over 100 kg. The foundation is installed, and outdoor equipment is installed on top of this.

  For example, in Patent Document 1, in a facility basic structure that is disposed at a place where a predetermined facility is to be installed and supports the facility, the location where the predetermined facility is to be installed has a predetermined interval. A pair of base members disposed substantially in parallel with each other, and a horizontal coupling member having fitting recesses at both ends for fitting with the upper surface of the base member, and the horizontal coupling member on the pair of base members An earthquake-resistant base (foundation) composed of a foundation portion for supporting the predetermined equipment by joining together is introduced.

  However, since this base stabilizes the base by its weight, it is inconvenient in transportation and installation because it has no strength against an earthquake and the base itself is large and heavy.

  Further, Patent Document 2 discloses an earthquake-resistant base device in which a block-shaped base body 11 on which an outdoor device installed outdoors is placed, a device connecting member 12 that connects the base and the outdoor device, and the base When an external force is applied to the seismic base device, the underground connecting member 13 is extended from the ground to the underground, and the embedded plate 14 is attached to the lower end of the underground connecting member. A base device that functions so that the embedded plate 14 coupled to the base main body 11 via the underground coupling member 13 resists toppling and tilting, and prevents stable toppling and tilting and realizes stable installation. It has been introduced.

However, this base device can be used in a relatively large area, but it cannot be used if there is an adjacent building, and sufficient installation space and work space cannot be secured under the eaves. There is a problem that the cost increases as a result.
Patent Document 3 introduces a screw anchor in which four anchors, each having a screw formed at the tip of an anchor with a top plate, are connected by an X-shaped bracket and a base plate is mounted thereon.
However, in the case of this screw anchor, when the screw anchor is screwed in, the top plate is in direct contact with the ground, so the rotation of the top plate shaves the ground or sinks into the ground, and the screwing amount is not stable. There is a problem that the level cannot be secured.

JP 2008-223399 A JP 2010-126948 A Utility Model Registration No. 3160003

  The present invention can be installed in a narrow place and has sufficient strength to prevent it from falling even in the event of an earthquake, and is small and light in weight. However, the task is to provide a foundation for outdoor equipment installation that allows construction work and is easy to level.

The present invention provides a means for solving the above-described problems, and the invention according to claim 1 is a basis for installing outdoor equipment. Forming a bottomed depression at the center of the top surface of the concrete substrate having a square shape in plan view, forming a spiral anchor insertion hole at the center of the depression, and providing a device fixing means on the upper surface;
b. A spiral anchor formed by forming a spiral blade portion on the lower end side of the anchor shaft, forming a screw portion and a rotary tool engaging portion on the upper end of the anchor shaft, and fixing a rotating plate in a hook shape below the screw portion; ,
c. The threaded portion of the spiral anchor is inserted into the spiral anchor insertion hole of the base body from below, and the threaded portion is exposed in the lowered portion, and then the threaded portion can be penetrated from below and exposed upward. A reinforcing plate having a hole, and being freely close to the bottom surface of the depressed portion of the foundation body;
d. A screw which forms a hole for determining the screwing position of the spiral anchor in the center, transmits the tightening force of the spiral anchor to the ground, prevents the rotation of the rotating plate from digging up the ground, and is exposed to the sagging portion of the base body An installation plate laid on the ground to stabilize the dimensions of the part,
e. A leveling plate for adjusting the level of the foundation body by inserting between the lower surface of the foundation body and the ground, and transmitting the force transmitted to the foundation body when tightening the nut to the ground;
f. The spiral anchor is screwed into the ground through the installation plate, the lower surface is brought into contact with the rotating base plate of the spiral anchor so that the lower surface is brought into contact, and the reinforcing plate is dropped into the lowered portion of the basic body. The nut formed on the upper end of the spiral anchor is exposed from the through hole of the reinforcing plate, and the nut is fixed to the spiral anchor by screwing and tightening the nut.
g. It is characterized by comprising.

  According to the present invention, the foundation main body may be sized for equipment installation, but the foundation main body is simply fixed to the ground with a spiral anchor with screw blades. Work becomes possible.

  Moreover, since the foundation main body is fixed with the spiral anchor, the strength against pulling out is large, and it is possible to construct a strong foundation that does not fall down in the event of an earthquake.

  In addition, since the foundation is small and light, it can be constructed by one worker, and the costs for production and transportation can be reduced, and the foundation body can be easily leveled by using a leveling plate.

  According to a second aspect of the present invention, in the outdoor equipment installation base according to the first aspect, the outer shape of the screw portion of the spiral anchor is formed as a two-sided rotating tool engaging portion, and the rotating tool engagement is performed. The spiral anchor can be screwed into the ground by rotating with a rotating tool applied to the part.

  In addition, the invention according to claim 3 is mixed in the soil of the ground when the ground for installing outdoor equipment according to claim 1 is soft ground where sufficient strength cannot be obtained in the soil into which the spiral anchor is screwed. It is characterized by providing a soil conditioner that is used to increase the yield strength.

Since the foundation of the present invention secures the foundation main body with a spiral anchor, it can ensure sufficient strength against pulling out during an earthquake and the like, and the spiral part is only formed on the lower end side of the anchor shaft about 2 to 3 passes, Since the soil around the anchor shaft is not broken when entering into the ground, the resistance against the extraction of the soil can be increased as compared with the conventional spiral anchor in which the spiral blade portion is formed on the entire shaft.
In addition, the installation plate can determine the screwing position of the spiral anchor, prevent the rotating plate from coming into contact with the ground when screwing the spiral anchor, and can stabilize the screwing amount. Further, the horizontal adjustment plate can be inserted between the four corners of the foundation body and the ground to adjust the level of the foundation body.

  In addition, the overall size is small and the number of parts is low, so the manufacturing cost is low, it is easy to transport and can be installed by one person, and each member can be installed from the vertical direction. Easy to work in places.

The exploded perspective view of the member which constitutes the foundation concerning the present invention. It is explanatory drawing of a basic body, Comprising: (A) is a top view, (B) is A-A 'sectional view, (C) is B-B' sectional view. It is explanatory drawing of a spiral anchor, Comprising: (A) is a front view, (B) is explanatory drawing of an anchor upper part, (C) is a top view of an anchor. It is explanatory drawing which shows the engagement relationship of a base main body and a spiral anchor, Comprising: (A) is a front view, (B) is a side view, (C) is a top view. (A)-(I) Explanatory drawing of a construction process. Explanatory drawing of the state which installed the apparatus.

An embodiment of the present invention will be described in detail with reference to FIGS.

FIG. 1 is an explanatory view showing a state in which each member is disassembled on the basis of the present invention based on the positional relationship during construction. In FIG. 1, reference numeral 1 denotes a base body, and the base body 1 is made of a metal frame 1a having a rectangular shape in plan view as shown in FIGS. 1 and 2A to 2C and a concrete body. A rectangular drop portion 2 is formed at the center of the upper surface, and a horizontally long spiral anchor insertion hole 3 is formed at the center of the drop portion 2.
This spiral anchor insertion hole 3 is a case where two spiral anchors are used, and when four spiral anchors are used, the insertion holes 3 are formed in two rows.

Also, fixing holes 4 made of female screws are provided at the four corners of the upper surface of the base body 1 as device fixing means.

However, a fixing anchor bolt may be projected in place of the fixing hole 4, and means for fixing the device to the foundation body 1 is not particularly limited.

Reference numeral 5 denotes a spiral anchor. As shown in FIGS. 1 and 3A to 3C, the spiral anchor 5 has a two-pitch spiral blade portion 6 formed at the lower end of the anchor shaft 5a, and the upper end side thereof. Is a configuration in which a two-sided rotating tool engaging portion 7a, a screw portion 7, and a circular rotary plate 8 are fixed in a hook shape under the screw portion 7.

Reference numeral 9 denotes a reinforcing plate, and the reinforcing plate 9 has a size that can be accommodated in the depressed portion 2 formed in the foundation body 1, and a through hole 10 that matches the spiral anchor insertion hole 3 is formed in the center. ing.
When four spiral anchors 5 are used, the through holes 10 are formed in two rows.

Reference numeral 11 denotes a nut which can be screwed into the screw portion 7 of the spiral anchor 5 via a washer 12.

A horizontal adjustment plate 13 is used by being inserted into four places between the bottom surface of the base body 1 and the ground in order to level the base body 1 when the base body 1 is placed on the ground.

14 is an installation plate for determining the position where the spiral anchor 5 is screwed into the ground and for preventing the rotating plate 8 from scraping the ground when the spiral anchor 5 is screwed. A hole 15 larger than the diameter of the spiral blade 6 and a notch opening 16 into which the anchor shaft 6 of the spiral anchor 5 can freely enter and exit are formed in the hole 15, and from the spiral anchor 5 through the opening 16. It can also be removed.

Next, the foundation construction process performed using each of the above components will be described with reference to FIGS.

First, as shown in FIG. 5A, two installation plates 14 are laid on the ground at the installation location, and the spiral anchor 5 is erected at the position defined by the hole 15 as shown in FIG. As shown in FIG. 2, the rotating wrench 17 is screwed into the ground until it is slightly lifted from the installation plate 14 by rotating the monkey wrench 17 against the rotating portion 7a.

In the embodiment, the monkey wrench 17 is used. However, the monkey wrench 17 may be rotated by a dedicated tool or a wrench having a large handle. The rotating tool is not limited to the monkey wrench 17 of the embodiment.

Next, as shown in (D), holding the rotating plate 8 with both hands and applying a force in the direction of the arrow, the resistance to pulling is confirmed.

  If there is anxiety about the yield strength at this stage, the soil is strengthened by mixing a commercially available soil improver in the surrounding soil (Claim 3).

As described above, the spiral anchor 5 is fixed in a state where it is not loosened by the frictional resistance between the contact surface (lower surface) of the rotating plate 8 and the horizontal installation plate 14, the spiral portion, and the contact surface of the soil.

At that time, a tensile force (axial force) is applied to the spiral anchor 5 and a compressive force is applied to the soil, resulting in a repulsive force.

With this force, the spiral anchor 5 is fixed in the ground.

  The horizontal installation plate 14 increases the ground contact area to prevent loosening as shown in (E) and prevents excavation of the ground (rotation) by the rotating plate 8, and the protruding length of the screw portion 7 of the spiral anchor shaft 5a. As a result, the washer 12 and the nut 11 are securely attached when the foundation body 1 is installed.

Next, as shown in (F), sand 18 is appropriately put around and the height with the surrounding ground is made uniform, and then, as shown in (G), the rotary plate 8 of the spiral anchor 5 is placed on the horizontal installation plate 14. Then, it is screwed in until it comes into contact with, and further, leveling plates 13 are laid in four places to adjust the level of the foundation body 1.

Next, as shown in (H), the threaded portion 7 of the spiral anchor 5 is passed through the insertion hole 3 of the base body 1, and the base body 1 is placed on the rotating plate 8 and the horizontal adjustment plate 13, and the depression portion is placed thereon. 2, the reinforcing plate 9 is dropped using the through hole 10.

Next, as shown in (I), the base body 1 is fixed to the spiral anchor 5 by inserting the washer 12 from above the reinforcing plate 9 and tightening the nut 11 into the screw portion 7.

As described above, when the nut 11 is tightened on the screw portion 7 of the spiral anchor 5 that is firmly installed, a tensile force (axial force) is applied to the spiral anchor shaft 5a and a compression force is applied to the installation plate 14 to repel each other. Power to do.

This compressive force works as a force on the load side to the ground, thereby exhibiting a function equivalent to or higher than that of a heavy foundation such as cited document 1.

  Even when an external factor such as an earthquake acts, the spiral anchor 5 does not come out due to the pulling resistance with the soil, and thus the device 19 installed on the foundation main body 1 does not fall down.

The construction of the foundation is completed as described above. After that, as shown in FIG. 6, the equipment 19 is placed on the foundation body 1, and the installation of the equipment 19 is completed by screwing the bolts on the equipment 19 side into the fixing holes 4.

Next, the result of the strength test when the above-described foundation is used will be shown.

Equipment 19 (hot water storage unit) size: 475 × 360 × 1990 mm,
When full of water: 161 kg, center of gravity height: 950 mm
Basic body 1 size: 600 x 400 x 60 mm
Spiral anchor 5: anchor shaft 5a length 800mm, shaft diameter 22mm
Spiral part 6 length 200mm, diameter 97mm

  When a rope is hung on the device 19 at a distance of 1 m from the foundation (the center of gravity of the device 19), and the inclination of the foundation body 1 is measured with an angle meter when a tensile force of 100 kg is applied from the horizontal direction, it is 1 degree. Although this angle was measured, this degree of inclination did not cause any problem, and this value indicates that even if a roll of 40% or less of the general weight of the seismic design is applied to the device 19, it will not fall over. It has been proved and confirmed to be extremely effective for earthquake countermeasures.

1 Foundation body 5 Spiral anchor 9 Reinforcing plate 11 Nut 13 Adjustment plate 14 Installation plate

Claims (3)

a. Forming a bottomed depression at the center of the top surface of the concrete substrate having a square shape in plan view, forming a spiral anchor insertion hole at the center of the depression, and providing a device fixing means on the upper surface;
b. A spiral anchor formed by forming a spiral blade portion on the lower end side of the anchor shaft, forming a screw portion and a rotary tool engaging portion on the upper end of the anchor shaft, and fixing a rotating plate in a hook shape below the screw portion; ,
c. The threaded portion of the spiral anchor is inserted into the spiral anchor insertion hole of the base body from below, and the threaded portion is exposed in the lowered portion, and then the threaded portion can be penetrated from below and exposed upward. A reinforcing plate having a hole, and being freely close to the bottom surface of the depressed portion of the foundation body;
d. A screw which forms a hole for determining the screwing position of the spiral anchor in the center, transmits the tightening force of the spiral anchor to the ground, prevents the rotation of the rotating plate from digging up the ground, and is exposed to the sagging portion of the base body An installation plate laid on the ground to stabilize the dimensions of the part,
e. A leveling plate for adjusting the level of the foundation body by inserting between the lower surface of the foundation body and the ground, and transmitting the force transmitted to the foundation body when tightening the nut to the ground;
f. The spiral anchor is screwed into the ground through the installation plate, the lower surface is brought into contact with the rotating base plate of the spiral anchor so that the lower surface is brought into contact, and the reinforcing plate is dropped into the lowered portion of the basic body. The nut formed on the upper end of the spiral anchor is exposed from the through hole of the reinforcing plate, and the nut is fixed to the spiral anchor by screwing and tightening the nut.
g. A foundation for outdoor equipment installation.   The outer shape of the screw portion of the spiral anchor is a two-sided rotating tool engaging portion, and the rotating tool engaging portion is rotated against the rotating tool so that the spiral anchor can be screwed into the ground. The outdoor equipment installation foundation according to claim 1, which is configured.   The outdoor equipment installation according to claim 1, further comprising a soil conditioner that is mixed with the soil of the ground and used to increase the yield strength when the soil where the spiral anchor is screwed is not soft enough. For foundation.

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