JPH09324545A - Footway for access platform - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a footway that is connected simply to an access platform by providing a pair of main beams arranged in parallel with each other at a specified distance, a middle beam to be laid for spanning the main beams, antiskid boards to be fixed to the upper side of a footway platform to be constructed in a gridlike form of the main beams and the middle beam, and a foldable balustrade to be erected on the main beam at the outside. SOLUTION: Two main beams 22a and 22b arranged oppositely with a specified distance provided in between and a middle beam 23 serving as a tie beam to be arranged for spanning the main beams 22a and 22b are assembled into a gridlike form, and thereby a footway platform is constructed. Antiskid boards are fixed to the upper side of the footway platform, and a foldable balustrade 30 is erected on the main beam 22b at the outside. On using, the main beam 22b is placed on a footway joist 14 and the main beam 22a is placed on a joist 12 on which lining boards 13 are laid. Therefore, the footway can be clearly distinguished from a carriageway and safety is ensured for walkers (workers).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sidewalk dedicated to a boarding gantry used in construction and civil engineering sites.

[0002]

2. Description of the Related Art At a construction site of a steel frame structure, a steel frame / reinforced concrete structure, or a reinforced concrete structure,
There is a temporary gantry on the first floor so that excavators, crane trucks, dump trucks for loading and unloading sand, large trucks for transporting steel frames, or ready-mixed trucks can be used to enter and leave the site where the trees have been cleared. It has become. Further, this gantry is used as a work stage of various work vehicles for construction of the basement or ground floor skeleton, and a part of the gantry may also be used as a sidewalk for field workers.

As described above, since various heavy work vehicles pass through and go in and out of the gantry, as shown in FIGS.
As illustrated in c), the Daihiki 11 is erected on the gantry support, and the joists 12 made of H-shaped steel or I-shaped steel are laterally laid on it at predetermined intervals. It is constructed by laying a large number of lining plates 13 side by side. In addition, when a part of the gantry is used as a sidewalk, the lining plate 13 is used.
On top of that, a method was used in which a sidewalk was designated by drawing a line with paint or the like for convenience.

[0004]

However, the conventional gantry has the following problems.
Usually, there is a problem in safety management of workers who pass by because the roadway and the sidewalk are not clearly separated. That is, even if a sidewalk is specified by drawing a line on the site, there is no car stop, so in reality, when the work vehicle is on the specified sidewalk or the outrigger of a crane vehicle is overhanging. However, the work categories were not always followed, and therefore, the safety of pedestrians who pass through the gantry was not sufficiently secured. Also, paint is applied on the lining plate, so when this lining plate is used for other places, its appearance (appearance)
Gets worse. Therefore, there is the annoyance that the paint has to be dropped again.

Although it has been considered to widen the width of the gantry to provide a dedicated sidewalk, it is not possible to use a part of the gantry as a humanitarian road so as to withstand the entry and exit of large heavy vehicles. It is uneconomical.

Therefore, the inventors of the present invention have made various investigations in view of the problems associated with the above-mentioned boarding gantry.
By developing a special sidewalk that can be easily connected to the gantry, the conventional drawbacks mentioned above were eliminated.

[0007]

In order to achieve the above-mentioned object, the present invention is a sidewalk for a boarding gantry which is provided on at least one side of a gantry on which lining boards are lined up and which constitutes a boarding surface of a vehicle. , A pair of main girders installed in parallel at a predetermined distance, a middle girder spanned between the main girders, and fixed to the upper surface of a sidewalk stand assembled in a grid pattern with the main girder and the middle girder. It consists of a non-slip plate and a foldable handrail standing on the outside main girder. If you use this,
A slip prevention clip for fixing the outer main girder to the joist,
Using the fall prevention stopper with fastening position adjustment mechanism that is fixed to the inner main girder, fix it on the joist of the gantry, and make sure that the main girder of the sidewalk pedestal is higher than the top height of the lining plate. By setting it, the pedestrians (workers) can be secured by clearly separating the roadway and the sidewalk, and the convenience and weight saving of diverting the gantry lining plate have been achieved.

[0008]

Embodiments of the present invention will be described below. First, an example of the installation situation of the exclusive sidewalk according to the present invention will be described with reference to the drawings. Figure 1 shows the boarding stand A
And a partial plan view showing an outline of a situation in which the sidewalk B dedicated to the present invention is connected, and FIG. 2 is a vertical sectional side view taken along the line II-II in FIG.
In the figure, reference numeral 10 is a gantry support pillar placed in the soil at intervals, 11 is a large pull installed above the gantry support pillar, 12
Is a joist made of H-shaped steel, and 13 is a lining plate continuously placed on the joist.

At least one side of the gantry A constructed as described above, a sidewalk joist 14 is arranged on the Daihiki 11, and a sidewalk stand is provided between the sidewalk joists 14 and 12. Several 20 sets are connected and installed. This sidewalk stand 2
Of course, 0 may be installed on both sides of the gantry A. Reference numeral 15 indicates a height adjusting piece, which is installed between the joist 14 and the Daihiki 11 if necessary.

As shown in FIG. 5, the sidewalk platform 20 has two columns of main girders 22a and 22b installed to face each other at a predetermined distance, and a middle girder 23 serving as a connecting material between the main girders. It is constructed by crossing over three. This mount has a length of 2 m and a width of 1 as an example so as to correspond to the dimensions of the lining plate.
One unit is constructed by assembling and fixing to a lattice of about m. In use, one main girder 22b is erected on the side joist 14 and the other main girder 22a is covered with the lining plate 1
It is used by installing it on the joist 12 in which 3 are arranged. The main girder 22a on the gantry side (inner side) is fixed to the joist 12 by using a pedestal fall prevention stopper 25 provided on the middle girder 23, and the main girder 22b on the opposite side (outer side) is made of H-shaped steel or the like. It is fixed to the joist 14 by using a slip prevention clip 24 described later.

The main girders 22a and 22b are formed by welding a stiffener / medium girder mounting plate to the inside of a groove-shaped member as an example, and the height h thereof is higher than the upper surface of the lining plate 13. (See FIG. 5). The reason for raising the main girder in this way is to clearly separate the roadway from the sidewalk, and to make the main girder function as a car stop so that the vehicle cannot physically enter the sidewalk. .

As described above, the gantry 20 assembled by assembling the main girders 22a, 22b and the three middle girders 23 in a lattice is continuously installed along one side of the gantry A, and thereby the lining is performed. Board 1
Prevents deviation of 3 in the left-right direction. Also the assembled pedestal 2
An anti-slip plate 26 made of a perforated metal or the like as shown in FIG. 3 is fixed to the upper surface of 0 at a height substantially equal to that of the upper surface of the lining plate via a mounting member 27. As the non-slip plate, it is preferable to use a material such as expanded metal or a perforated plate equivalent thereto, because it is lightweight and has a non-slip function.

Reference numeral 30a is an upper handrail, and 30b is a lower handrail, both of which can be bent through a hinge 29 provided on the support column 28. For the outer main girder 22b, the handrail 30 supported by the foldable handrail support 28 is placed in a state in which the base of the support is rotatable by a rotating shaft 31 made of a bolt nut as shown in FIGS. It is integrated. Incidentally, reference numerals 29a and 31a are holes for preventing the columns from falling down near the pivot shaft 31 of the columns and the column hinges 29, and insertion pins and bolt nuts 29b and 31b are inserted into the holes. Normally, it prevents the column 28 from inadvertently falling. Lower handrail 30b and main girder 22b
A blindfold material 30c is stretched between and. A perforated metal, a wire mesh, a synthetic resin plate, or the like may be used as the blinding material.

Incidentally, the state shown by the phantom line in FIG. 5 is a folded state when the handrail is not used, and the pins or bolts 29b, 3b from the holes 29a, 31a for preventing the columns from falling.
1b is removed and the support is folded in two. In this state, the upper handrail 30a and the lower handrail 30b are arranged within the height h between the main girders 22a and 22b so as not to project above the main girder.

As described above, the main girder 2 on the gantry side (inside)
2a is a mount fall prevention stopper 25 provided on the middle girder 23.
To the upper flange surface of the joist 12 and fasten them (see FIG. 5). Below is this pedestal fall prevention stopper 25
The configuration of will be described in detail. As shown in FIG. 6, the stopper 25 is provided at a predetermined position on the back surface of the middle girder 23 near the gantry side. The stopper is attached to a cylindrical support member 32 whose one side is open. Slots 33a and 33b extending in the longitudinal direction of the middle girder 23 are formed on both upper and lower surfaces of the support member 32. A suspending member 34 made of a bolt and a nut is inserted in the elongated hole so as to be movable. Upper part of hanging material, that is, bolt head 34a
Causes the nut 34b to be suspended and held inside the support member by projecting it upward from the upper surface elongated hole 33a of the support member 32.
Further, a grooved plate 35 having a substantially U-shaped groove 36 into which the upper flange of the joist 12 can be gripped is fixed to the nut 34b, and this plate is inserted so as to be retractable below the lower surface elongated hole 33b. There is. The grooving plate 35 is attached to the joist 1 through the bottom surface long hole 33b provided in the support member.
The fastening position with respect to the joist can be adjusted by moving slightly toward or away from 2.

When the pedestal 20 is connected to the gantry A, the pedestal fall prevention stopper 25 is provided in the lower surface elongated hole 33b of the supporting member.
Then, as shown in FIG. 5, the U-shaped groove 35 is gripped on the upper flange surface of the joist 12 and the bolt 34a is tightened and fixed to the nut 34b. The H-section steel used for the joist 12 is not necessarily constant, and the H-section steel having a large size and the one having a small size are properly used according to the situation at the site.
In such a case, even if the size of the joist changes, the groove of the grooving plate 35 can be dealt with in the present invention.
It is set large in advance. The position of the suspending member 34 can be moved along the elongated hole,
As a result, as shown in FIG. 9, it is possible to change the fastening position according to the situation of use at the site.

Reference numeral 36 is a storage pin projecting from the side surface of the grooved plate 35, and when not in use, this pin is hooked on the locking portion of a holding base 37 with a locking step provided inside the support member 32. Then, the grooved plate 35 is stored and held inside the support member 32.

On the other hand, the main girder 22b is fixed to the side joist 14 made of H-shaped steel or the like via a slip prevention clip 24. The state of attachment is shown in FIG. Bolt nuts 38, 3 in the bolt holes opened in the side joist 14
The slip prevention clip 24 is tightly connected at 9 and the lower flange of the main girder 22b is sandwiched between the taper surface 24a formed on the lower surface of the clip 24 and the flange surface of the joist 14 and fixed so as not to move.

As described above, the sidewalk frame 20 of the present invention is
It is arranged on the joist 14 for sidewalks and the haul 11 and is connected to at least one side of the gantry by a slip prevention clip 24 and a fall-prevention stopper 25. As shown in, connect several sets to build a sidewalk of the required length.

[0020]

According to the present invention, a pair of main girders installed in parallel on a joist at a predetermined distance, a middle girder bridged between the main girders, and the main girder and the middle girder. An anti-slip plate fixed to the upper surface of the sidewalk frame assembled in a lattice shape, a foldable handrail standing on the outer main girder, a slip prevention clip for fixing the outer main girder to a joist, and an inner side. It is equipped with a fall prevention stopper with a fastening position adjustment mechanism that is fixed to the main girder and the main girder is set higher than the top surface of the lining plate, so the roadway and sidewalk should be clearly separated. (Worker) safety can be secured.

Further, since it is not necessary to draw a line on the lining plate with paint, deterioration of the appearance can be prevented even when the lining plate is reused.

Further, since the sidewalk of the present invention is provided with a handrail, it is economical because it is not necessary to newly provide a handrail. Furthermore, it is not necessary to weld the lining plate joists to prevent displacement of the lining plate, improving workability when building the gantry,
The effect of improving the quality of the construction material can be achieved.

[Brief description of drawings]

FIG. 1 is a plan view showing how a dedicated sidewalk according to the present invention is attached.

FIG. 2 is a vertical sectional side view taken along the line II-II of FIG.

FIG. 3 is a plan view of a gantry unit.

FIG. 4 is a vertical sectional side view taken along the line IV-IV in FIG.

5 is a vertical cross-sectional side view taken along the line VV of FIG.

FIG. 6 is a plan view of the middle girder.

FIG. 7 is a front view of the middle girder.

FIG. 8 is a bottom view of the middle girder.

FIG. 9 is an explanatory view of the behavior of the fall prevention stopper.

10 is a vertical cross-sectional side view taken along the line XX of FIG.

FIG. 11 is an explanatory diagram of a slip prevention clip.

12A is an explanatory view showing a side surface of a gantry, FIG. 12B is a plan view thereof, and FIG. 12C is a longitudinal side view thereof.

[Explanation of symbols]

 10 gantry props 11 Daihiki 12 joists 13 abdominal work plates 14 sidewalk joists 20 sidewalk pedestals 22a, 22b main girders 23 middle girders 24 anti-slip clips 25 pedestal fall prevention stoppers 26 non-slip plates 27 mounting brackets 28 struts 29 hinges 30 Handrail 31 Rotating shaft 32 Supporting members 33a, 33b Long hole 34 Hanging material 35 Grooved plate 36 Storage pin 37 Holding base 38, 39 Bolt nut

Front page continuation (72) Inventor Takuya Tamura 1-6-5 Nihonbashihonmachi, Chuo-ku, Tokyo Marufuji Sheet Pile Co., Ltd. (72) Inventor Tsuneyoshi Hioki 1-6-5 Nihonbashihonmachi, Chuo-ku, Tokyo Marufuji Sheet Inside Pile Co., Ltd.

Claims (7)

[Claims] 1. A sidewalk for a loading gantry, which is continuously provided on at least one side of the gantry in a gantry on which lining boards are laid out and which constitutes a boarding surface of a vehicle, and which are installed in parallel at a predetermined distance. Main girder (22a,
22b) and a middle girder (23) to be bridged between the main girders,
A non-slip plate (26) fixed to the upper surface of a sidewalk stand (20) assembled in a grid pattern with the main girders and middle girders, and a handrail (30) standing on the outer main girders (22b). Sidewalk for boarding gantry consisting of. 2. At least one side of the gantry in a gantry in which a joist is laid horizontally on a large haul provided at the upper part of the gantry support, and a lining plate is laid on it to form a vehicle entry surface. A sidewalk for a boarding gantry that is continuously provided, and a pair of main girders (22a, 22b) installed in parallel on the joist at a predetermined distance, and a middle girder (23) bridged between the main girders. And a non-slip plate (26) fixed to the upper surface of a sidewalk stand (20) assembled in a grid pattern with the main girder and middle girder, and foldable upright on the outer main girder (22b) A handrail (30), a slip prevention clip (24) for fixing the outer main girder (22b) to a joist, and a fall prevention stopper (2) fixed to the inner main girder (22a).
5), and the main girder is set to be higher than the height of the upper surface of the lining plate. 3. The sidewalk for a boarding gantry according to claim 2, wherein several pedestals (20) for the sidewalk are arranged in a row in the length direction of the gantry. 4. The handrail (30) has an outer main girder (22) at the base of a handrail support pole having a folding hinge (29).
3. The boarding gantry according to claim 1 or 2, which is integrated so as to be rotatable by a rotation shaft with respect to b), and is provided with means for preventing the column from collapsing in the vicinity of the rotation shaft and the hinge. Sidewalk. 5. The fall prevention stopper (25) has elongated holes (33a, 33b) extending in the longitudinal direction of the middle girder, which are fixed at predetermined positions of the middle girder (23), formed on both upper and lower surfaces. A suspending member (3) comprising a support member (32) and a bolt and nut inserted and supported in the elongated hole so as to be movable.
4) and a grooved plate (35) suspended and held by the suspending member, the grooved plate being capable of projecting and retracting through a slotted hole on the lower surface and engaging with a joist's flange. The sidewalk for the access gantry according to claim 2, which has means. 6. The sidewalk for boarding gantry according to claim 5, wherein a holding base (37) for storing said grooved plate (35) is integrally formed inside said support member (32). 7. The slip prevention clip (24) is provided with bolt nuts (38, 3) in bolt holes formed in a side joist.
9), the outer main girder (22b) is provided between the taper surface formed on the lower surface of the clip and the flange surface of the joist.
The sidewalk for boarding gantry according to claim 2, which is fixed by sandwiching a lower flange of the.