JP3126097B2 - Basic structure of two-stage parking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plurality of anchor bolts which are inserted into a plurality of anchor bolt holes formed in a base plate of a two-stage parking device to fix the base plate.
The present invention relates to a basic structure of a two-stage parking device buried and fixed except for an upper end portion inserted into an anchor bolt hole of a base plate.

[0002]

2. Description of the Related Art First, an example of a two-stage parking device installed on the ground through such a basic structure will be described with reference to FIGS. 6 and 7. The pallet 13 for mounting a vehicle is mounted on a base plate 10 upright. It is supported by an arm assembly 12 that is guided and supported by a pair of columns 11 so as to be able to move up and down, and is moved up and down by a motor (not shown). Thus, another vehicle can be parked in the space below the raised pallet 13. The support 11 is covered with a cover 15 in a use state.

[0003] Such a two-stage parking device comprises four anchor bolt holes 14a formed in a base plate 10 at the upper end of four anchor bolts 6 embedded and fixed in the concrete 2 of the foundation 1 and projecting upward from the concrete 2. , 14b,
14c is inserted and fastened with a nut.

[0004] Such a conventional foundation 1 is shown in Figs.
As shown in the figure, the ground G is dug to a predetermined depth, and the anchor bolt 6
Is formed by hitting concrete 2 which is thicker than the burial depth. The concrete 2 has a deformed reinforcing bar 3 which is arranged in a lattice and whose intersection is bound by a wire, is buried in a middle portion in the thickness direction, and is entirely reinforced. The reinforcing bar 3 is arranged so as to avoid the bolt installation positions 5a, 5b, 5c where the anchor bolts 6 are provided, and a bolt burying hole is formed at each of these positions to fix the anchor bolt 6 in place. For example, as shown in FIG. 6, the size of the concrete 2 is almost the same as the pallet 13 and the length is slightly larger than the width of the base plate 10, but the length may be almost the same as the pallet 13. . As the anchor bolt 6, a strike anchor bolt and a chemical anchor bolt (both will be described in detail later) are used.
Concrete 2 is installed using a formwork as needed.

[0005]

In the foundation of the prior art described above, the entire concrete is thicker than the anchor bolt burying depth and is entirely reinforced by the reinforcing bar 3, so that the foundation work area for providing the reinforcement is large. At the same time, there is a problem in that the amount of concrete and reinforcing steel bars increases, and thus the cost required for foundation work increases. SUMMARY OF THE INVENTION An object of the present invention is to reduce the area required for foundation work by reducing the foundation work area where reinforcement is provided while securing necessary strength.

[0006]

To this end, the basic structure of the two-stage parking device according to the present invention comprises a concrete layer provided on the ground over a wider area than the base plate of the two-stage parking device and having no reinforcing steel. , Multiple concrete short pillars buried in the ground centered around each bolt installation position corresponding to each anchor bolt hole of the base plate and connected to the concrete layer at the top, and almost symmetrical around each bolt installation position A plurality of vertical reinforcing bars that are arranged vertically and almost vertically, each lower part is driven into the ground, and each upper part excluding the lower part is integrally connected to the concrete short pillar, and around the bolt installation position.配置 The lower part is driven into the ground symmetrically and the lower part spreads out and each lower part is driven into the ground and each upper part except this lower part is integrated with the concrete short pillar It is characterized in that it comprises a plurality of combined inclined rebars and a plurality of anchor bolts buried and fixed at each bolt installation position which is the center of each concrete short column and whose upper end protrudes from the upper surface of the concrete short column. Things.

[0007]

The anchor bolts are buried and fixed at the center of the concrete short pillar buried in the ground and the upper end is connected to the concrete layer, and the upper end protrudes from the upper surface of the concrete short pillar. The base plate of the two-stage parking device is
Each anchor bolt hole is inserted through this upper end and fixed. Each concrete short pillar is not only buried in the ground, but also a plurality of vertical reinforcing bars and inclined reinforcing bars whose upper parts are integrally connected to the respective concrete short pillars 23 are connected to the ground by driving the lower part into the ground. Since the strength is reinforced, the bonding strength of each short concrete column to the ground is sufficiently large.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The basic structure of a two-stage parking device according to the present invention will be described below with reference to the embodiments shown in FIGS. The two-stage parking device installed according to the present invention is the same as that shown in FIGS. 6 and 7 described above in connection with the prior art.

As shown in FIGS. 1 and 2, the structure of the foundation 20 of the present embodiment has a concrete layer 21 which is thinner than the conventional one.
4 for burying and fixing anchor bolts 31 and 36 described later.
It is made up of individual concrete short columns 23. The concrete layer 21 has a smaller thickness than the anchor bolts 31 and 36 and has no reinforcing steel, and is provided over a wider range than the base plate 10 of the two-stage parking device. Although the width of the concrete layer 21 of this embodiment is substantially the same as the width of the pallet 13 and the length thereof is about twice the width of the base plate 10, the width is the same and the length is almost the same as that of the pallet 13. The same or a wider concrete layer 21 may be provided. The concrete layer 21 is provided on the crushed stone layer 22.

Each concrete short pillar 23 is provided with an anchor bolt hole 14a, provided in the base plate 10 of the two-stage parking device.
The bolts are buried in the ground G around the bolt installation positions 29a, 29b, and 29c corresponding to the bolts 14b and 14c (see FIG. 7), and each upper end is connected to the concrete layer 21. Each concrete short pillar 23 has a substantially cylindrical shape with a thicker lower portion embedded in the ground G, and upper halves of four vertical reinforcing bars 24 and inclined reinforcing bars 25 are integrally embedded and fixed. Each vertical reinforcing bar 24 is a concrete short column 2
3 bolt installation positions 29a, 29b, 29 at the center of 3
Each lower half protruding from the concrete short pillar 23 is driven into the ground G substantially symmetrically and substantially vertically around the vicinity of c. The upper half of each inclined rebar 25 is integrally connected to the concrete short column 23 similarly to the vertical rebar 24 except that the upper end is bound to the upper end of each vertical rebar 24 by a wire 26 and extends downward and outward. The respective lower halves projecting from the concrete short columns 23 are driven into the ground G. Reinforcing bars 24 and 25 are located in the periphery of concrete short pillar 23 except for the center, and concrete short pillar 2
3 does not protrude upward.

One anchor bolt 31, 36 is embedded and fixed at each bolt installation position 29 a, 29 b, 29 c which is the center of each concrete short column 23. It is protruding. A strike anchor bolt 31 having a weak pull-out strength for positioning purpose is installed at a bolt installation position 29a at the center of the concrete short pillar 23 corresponding to the anchor bolt hole 14a located at the center among the anchor bolt holes 14a of the base plate 10. Bolt installation position 29b, 2 at the center of concrete short column 23 corresponding to anchor bolt holes 14b, 14c
9c is a chemical anchor bolt 3 with strong pull-out strength.
6 is installed.

Next, the concrete construction steps of the basic structure of the two-stage parking device of the above embodiment will be described with reference to FIGS. First, the ground G is dug to a predetermined depth shallower than in the past, and crushed stone is laid on the bottom thereof and crushed to form a crushed stone layer 22. A formwork is provided on the crushed stone layer 22, cement and sand are mixed therein, gravel is added as an aggregate, and concrete kneaded with water is poured. After the concrete is hardened, the formwork is removed and the concrete layer 21 is removed.
To form The concrete layer 21 is relatively thin, 60 to 8
This construction is extremely simple because it is about 0 mm and no reinforcing bars are provided. In this state, the concrete short columns 23 are not provided. The concrete layer 21 has a thickness of 60
If there is an existing concrete layer of mm or more, it may be used.

Next, anchor bolt holes 14a, 14b, 14
The four bolt installation positions 2 on this concrete layer 21 by using a template matched to
9a, 29b, and 29c are scribed, and circles corresponding to the upper openings 27a of the four excavation holes 27 for the concrete short columns 23 are scribed centering on each installation position. Then, as shown in FIG. 3 (a), an upper opening 27a is opened in the concrete layer 21 with a hanging tool, and the crushed stone layer 22 and the ground G are excavated with a small scoop to form a short column forming hole 27. Sand is laid and squeezed to form a sand layer 28. In this embodiment,
The diameter of the upper opening 27a of the short column forming hole 27 is 200 mm, the depth is 250 mm from the surface of the concrete layer 21, and the lower portion 27b of the short column forming hole 27 is thicker than the upper opening 27a and has a diameter of 300 mm.

Next, as shown in FIG. 3 (b), four rod-shaped deformed reinforcing bars 24 each having a diameter of 10 mm and a length of 550 mm having a large number of irregularities extending in the circumferential direction formed on the outer peripheral surface are attached to the bolt installation position. The lower portion of the deformed reinforcing bar 24 is hammered into the ground G on the bottom surface of the short column forming hole 27 by arranging it vertically and symmetrically with respect to the centers 29a, 29b and 29c. In addition, four inclined deformed reinforcing bars 25 having the same shape and size are similarly driven into the ground G outward and diagonally downward from the upper end of the vertical deformed reinforcing bar 24. Both rebars 24 and 25 are driven in until the upper ends thereof are located 10 mm below the upper surface of the concrete layer 21, and the upper ends are slightly crossed and bound by wires 26.

Next, as shown in FIG. 3 (c), mortar obtained by mixing ordinary Portland cement and plaster sand and mixing with water is poured into each short column forming hole 27. After the curing period (for example, 5 days in summer and 7 days in winter) elapses, the upper end portion becomes concrete layer 2
The concrete short pillar 23 is connected to 1 and has an upper half except for the lower half of the four vertically deformed reinforcing bars 24 and the inclined deformed reinforcing bars 25 whose lower half is driven into the ground G. can get. As described above, each concrete short pillar 23 is not only buried in the ground G with a thick bottom, but also each of the plurality of vertical reinforcing bars 24 and the inclined reinforcing bars 25 whose upper portions are integrally connected to each concrete short pillar 23. Since the lower part is driven into the ground G to reinforce the bonding strength to the ground G, the bonding strength of each short concrete pillar 23 to the ground G is sufficiently large.

Next, the anchor bolts 31 and 36 fixed to the center of each concrete short column 23 and the embedding process thereof will be described with reference to FIGS. First, the base plate 10 of the two-stage parking device is placed on the concrete layer 21 and the concrete short columns 23, and the respective anchor bolt holes 14a, 14b, 14
c and the bolt installation position 2 at the center of each concrete short column 23
Positioning is performed so that 9a, 29b and 29c coincide.

Since the strike anchor bolt 31 corresponding to the anchor bolt hole 14a at the center of the base plate 10 is installed before the chemical anchor bolt 36, the embedding process thereof will be described with reference to FIG. Strike anchor bolt 3
As shown in FIGS. 3 (b) and 3 (c), 1 has a pin 32 provided coaxially, and when it is driven in, a strike anchor bolt 31 divided into a plurality of parts by an axial slit.
Is opened by the tip 32a of the pin 32, and the outer periphery of the tip 31a of the strike anchor bolt 31 is provided with circumferential irregularities.
First, as shown in FIG. 4 (a), a predetermined bolt burial hole 30 (in this embodiment, a diameter of 17 mm and a depth of 90 mm) is drilled at the center of the concrete short column 23 concentrically with the anchor bolt hole 14a.
mm), remove the chips with a metal brush, and completely remove the chips with a blower.

Next, as shown in FIG. 4 (b), a strike anchor bolt 31 in which a nut 33 and a washer 33a are screwed into a predetermined position, and a tip portion 31a of which has a bolt burying hole 30a.
Is inserted through the anchor bolt hole 14a of the base plate 10 so as to reach a predetermined depth. And pin 32
When the upper end of the strike anchor 34 is driven in with the hammer 34, the strike anchor bolt 31 is opened and the front end 31a is opened and engaged with the inner surface of the bolt buried hole 30, as shown in FIG. 3 (c).
In this state, the nut 33 is tightened and the base plate 10
So that it does not move. The strike anchor bolt 31 of this embodiment has an outer diameter of 16 mm, a length of 150 mm, and an amount of protrusion from the upper surface of the base plate 10 of 25 mm.

Next, the step of embedding the three chemical anchor bolts 36 will be described with reference to FIG. An anchor capsule 37 for fixing a chemical anchor bolt 36, which is a normal stud bolt, encloses an adhesive such as an uncured epoxy acrylate resin in a glass capsule having a plurality of constrictions formed on an outer peripheral surface, and forms an inner constricted portion. Is provided with a curing agent. First, as shown in FIG. 5 (a), a predetermined bolt embedding hole 35 (diameter 19 mm, depth 14 mm) is drilled concentrically with the anchor bolt holes 14b and 14c in the center of the concrete short column 23 by drilling.
0 mm), and chips are completely removed as in the case of the strike anchor bolt 31.

Next, as shown in FIG. 5B, an anchor capsule 37 (16.5 mm in diameter and 120 mm in length) is inserted into the bolt buried hole 35, and the stopper 3 is inserted as shown in FIG. 5C.
The chemical anchor bolt 36 into which 8 is inserted is inserted from the anchor bolt hole 14b and is driven in with the hammer 39. Thereby, the glass of the anchor capsule 37 is crushed, and the crushed glass flakes are mixed with the adhesive, the hardener and the mixture 37.
A is filled between the bolt burial hole 35 and the chemical anchor bolt 36 as shown in FIG. After a predetermined curing time (for example, 160 minutes at 0 ° C. and 20 minutes at 30 ° C.), the mixture 37A hardens and the chemical anchor bolt 3
6 is embedded and fixed to the short concrete pillar 23. In this state, the nut 33 is tightened to firmly fix the base plate 10. The chemical anchor bolt 36 provided at the bolt installation position 29b has an outer diameter of 16 mm and a length of 200 mm.
The protrusion amount from the upper surface of the base plate 10 is 25 mm.
Anchor bolt hole 14c serving as a tip of base plate 10
Is provided with a spot facing as shown by a two-dot chain line in FIG.
The chemical anchor bolt 36 provided at the bolt installation position 29c has an outer diameter of 16 mm and a length of 175 mm, and its tip is almost the same height as the upper surface of the base plate 10.

As described above, each of the anchor bolts 31 and 36 is
The concrete short pillars 23 are buried and fixed at the respective bolt installation positions 29a, 29b, 29c, which are central portions thereof, and the respective upper ends protrude from the upper surface of the concrete short pillars 23. The anchor bolts 31 at the bolt installation positions 29a and 29b except for the bolt installation position 29c which is the tip of the base plate 10,
The upper end of the cover 36 covers the support 11 of the two-stage parking device.
5 is located within.

[0022]

As described above, according to the present invention, since the foundation work for providing reinforcement is only near each concrete short column in which anchor bolts are buried, the area of such foundation work is reduced and concrete and The amount of reinforcing steel used is reduced, so that the cost required for foundation work can be reduced. In addition, since each concrete short pillar has a required bonding strength to the ground by the vertical reinforcing bars and the inclined reinforcing bars, the mounting strength of the base plate does not decrease.

[Brief description of the drawings]

FIG. 1 is an overall plan view showing an embodiment of a basic structure of a two-stage parking device according to the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is an explanatory view of a concrete short pillar of the embodiment shown in FIG. 1 and a construction process of its reinforcement.

FIG. 4 is an explanatory view of a construction process of a strike anchor bolt.

FIG. 5 is an explanatory view of a process for installing a chemical anchor bolt.

FIG. 6 is an overall perspective view of an example of a two-stage parking device installed according to the present invention.

FIG. 7 is a plan view of a base plate of the two-stage parking device shown in FIG.

FIG. 8 is an overall plan view showing an example of a basic structure of a two-stage parking device according to the related art.

9 is a cross-sectional view of the basic structure shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Base plate, 14a, 14b, 14c ... Anchor bolt hole, 21 ... Concrete layer, 23 ... Concrete short column, 24 ... Vertical rebar, 25 ... Inclined rebar, 29a, 2
9b, 29c: bolt installation position, 31, 36: anchor bolt, G: ground.

Claims (1)

(57) [Claims] 1. The basic structure of a two-stage parking device, wherein a plurality of anchor bolts for fixing a base plate of the two-stage parking device are buried and fixed except for an upper end portion inserted into an anchor bolt hole formed in the base plate. A concrete layer provided on the ground over a wider area than the base plate and having no reinforcing steel, and an upper end buried in the ground around the vicinity of each bolt installation position corresponding to each anchor bolt hole, and an upper end portion is formed of the concrete layer. A plurality of short concrete pillars connected to each other, and each of the lower parts are driven into the ground while being arranged substantially symmetrically and substantially vertically about the vicinity of each of the bolt installation positions, and each upper part excluding this lower part is made of the concrete. A plurality of vertical reinforcing bars integrally connected to the short pillars; A plurality of inclined rebars each of which is arranged in an eight-letter shape and whose lower part is driven into the ground and whose upper part excluding this lower part is integrally connected to the concrete short pillar, and a central part of each concrete short pillar And a plurality of anchor bolts buried and fixed at the respective bolt installation positions and having upper ends protruding from the upper surface of the concrete short pillar.