JP2931760B2 - Scaffold structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scaffold structure suitable for construction work, maintenance work and inspection work of a cylindrical tank or other cylindrical building for storing gas or oil, for example.

[0002]

2. Description of the Related Art Conventionally, as a scaffold structure, a rectangular step is supported by four pillars, and two rectangular pillars are commonly used next to the steps to connect the rectangular steps. Had become.

[0003] A horizontal frame provided between the columns is welded by fitting a cap fitting provided at the base end of a wedge-shaped member to a cylindrical pipe. Then, after the wedge-shaped member is inserted into the engagement hole of the engagement fitting fixed to the outer periphery of the column from above, the outer periphery of the cap fitting is hit with a hammer or the like to press-fit the wedge-shaped member into the engagement fitting. Was.

[0004]

When a conventional scaffolding structure is used by being linearly arranged on a building or the like,
Since each step is horizontally arranged at the same height position, there is no particular problem.

However, when assembling or performing maintenance and inspection of a cylindrical building such as a gas tank, for example,
Since each step is obliquely attached to each other and the ends of the steps must be assembled by overlapping them up and down,
There was a problem that a step was formed, which hindered the traffic of workers.

In addition, since the horizontal frame has a cap fitting of a wedge-shaped member fitted to the end of the cylindrical main body, when the wedge-shaped member is pressed into the engagement fitting, the cap fitting is hit. No damage. However, when disassembling the scaffold,
There is no other choice but to hit the main body in the vicinity of the cap metal from below to upward, so that there is a problem that the main body is easily damaged.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and to use it, for example, in the vicinity of a circular tank or the like.
It is an object of the present invention to provide a scaffold structure that can easily be constructed horizontally and in an arc without steps.

Another object of the present invention is to provide a scaffold structure capable of preventing damage to a horizontal frame during a disassembling operation of the scaffold structure in addition to the above objects.

[0009]

In order to achieve the first object, the invention according to claim 1 has four columns and four columns.
A pair of four horizontal frames, which are laterally connected to each other via a wedge-shaped member and an engagement fitting provided, and at least a plurality of horizontal frames of each horizontal frame.
Supporting the lifting, and the scaffold structure is constructed arcuately disposed between formed empty inside using the automatic answering step of each lateral frame and
In the above, the horizontal frame is fixed to a cylindrical main body and both ends thereof.
A downwardly extending wedge-shaped member,
Of these horizontal frames, the wedge-shaped members of a pair of
While tilting it with respect to the center axis of the horizontal frame body,
Position the wedge-shaped members of the pair of horizontal frames on the center axis of the horizontal frame body.
And press-fit it from above into the engaging holes of the fittings provided on each column.
It is configured to specify .

According to a second aspect of the present invention, in order to achieve the second object, in the first aspect, the horizontal frame comprises a cylindrical main body, and a cylindrical mounting cap fitted and fixed to both ends thereof. It is constituted by a wedge <br/> shaped member Ru extending downwardly fixed to the end face of the mounting cap, provided with the wedge-shaped member on each post
And press-fit into the engaging hole of the engaging fitting from above.

According to a third aspect of the present invention, in order to achieve the first object, the side edge of the step in the first or second aspect is provided.
It is fitted with a hooking bracket having a concave portion engaged Ru from above into the lateral frame.

[0012]

According to the first aspect of the present invention, each of the four horizontal frames has an alternate shape.
The wedge-shaped members of a pair of horizontal frames facing each other are
Wedges of the other pair of horizontal frames
The material was positioned on the center axis of the horizontal frame body and provided on each support.
Press into the engaging hole of the engaging bracket from above and fix it.
Using the steps located in the space formed inside
The scaffold structure is formed in an arc shape. For this reason, a plurality of sets used
Since the scaffolding structure configured for use as a whole is configured in an arc shape, a plurality of steps are held at the same height position,
Workers pass smoothly.

According to the second aspect of the present invention, since the mounting cap is fitted and fixed to the end of the horizontal frame main body and the wedge-shaped member is fixed to this cap, the wedge-shaped member is engaged with the engagement fitting. By hitting the mounting cap with a hammer or the like when removing or pulling out, the damage to the horizontal frame main body can be prevented.

Further, in the invention according to the third aspect, since the latch is attached to the side edge of the step, the recess of the latch is fitted into the horizontal frame from above, so that the step can be mounted. It can be done easily.

[0015]

FIG. 1 shows an embodiment of the present invention.
This will be described with reference to FIG. This scaffold structure has a plurality of columns 1-4 as schematically shown in FIGS.
A plurality of horizontal frames 5 to 8 that are erected and connected to the columns 1-4.
And a trapezoidal plate-like step 9 which is removably mounted inside the horizontal frames 5 to 8 connected in a trapezoidal ring as a whole.

The column 1 is, as shown in FIG. 3, a column main body 10 formed by cutting a cylindrical metal pipe to a predetermined height.
On the other hand, four U-shaped engaging metal fittings 11 to 14 are fixed by welding. These engagement fittings 11 to 14
Are vertically penetrated, and 180
The pair of engaging members 11, 12 provided at a distance from each other are at the same height position, and the engaging members 13, 14, which are 90 degrees out of phase with both engaging members 11, 12, are the engaging members 11, 12, respectively. Located on the lower side. These engaging fittings 11 to 14 are fixed to the support 1 at two positions, respectively, above and below. The pillar body 10
A cylindrical connection tube 15 is fitted into the upper end opening of the main body 10, and the connection tube 15 is fixed to the main body 10 by a connection pin 16. Further, holes 10a and 15a are formed in the lower end portion of the column main body 10 and the connecting cylinder 15 so as to penetrate in the horizontal direction. For this reason, the lower end portion of another column 1 is fitted into the connecting tube 15 of the column 1 and a connecting pin (not shown) penetrates the holes 10a and 15a so that the columns 1 and 1 can be connected to each other in series. It is. The other columns 2 to 4 are formed similarly to the column 1.

As shown in FIG. 4, the horizontal frame 5 has a main body 16 formed by cutting a horizontal cylindrical metal pipe into a predetermined length.
Mounting caps 17 and 18 fitted to outer peripheral portions of both ends of the main body 16 and fixed by welding;
8 are wedge-shaped metal fittings 19 and 20 which are fixed to the distal end face by welding and have a substantially U-shape. The wedge-shaped fittings 19 and 20 are formed in a tapered shape that becomes thinner toward the lower end. That is, the vertical surfaces 19a,
20a is formed in an arc shape so as to follow the outer peripheral surface of the column body 10, and the opposite side thereof has a vertical surface 19a, 20a near the lower end.
Are inclined portions 19b and 20b approaching the front. Then, as shown in FIG. 5, for example, wedge-shaped fittings 19, 20 of the horizontal frame 5
To the engaging holes 12 of the engaging fittings 12 and 11 of the columns 1 and 2.
a and 11a can be inserted from above.
At the time of this connecting operation, the wedge-shaped fittings 19, 20 are forcibly pushed into the engagement holes 12a, 11a by hitting the mounting caps 17, 18 with a hammer. Are connected and fixed to each other in a parallel state.

As shown in FIG. 1, a wedge-shaped fitting 1 of a horizontal frame 5 for connecting columns 1 and 2 disposed close to a cylindrical tank T.
9 and 20 are slightly inclined with respect to the central axis of the main body 16. Similarly, the horizontal frame 6 that connects the columns 3 and 4 that are spaced apart from the cylindrical tank T is formed longer than the horizontal frame 5 ,
The wedge-shaped fittings 19 and 20 are also slightly inclined with respect to the central axis of the main body 16. Further, the horizontal frames 7, 8 arranged in the radial direction with respect to the cylindrical tank T are formed to have the same length, and the wedge-shaped fittings 19, 20 are located on the center axis of the main body 16.

Next, step 9 will be described. In this step 9, as shown in FIG. 1, a trapezoidal frame 21, a wire mesh 22 welded and fixed to the frame 21, a reinforcing frame 23 connected to the center of the frame 21, a right and left Each pair of latches 24 is fixed to both sides by welding. As shown in FIG. 6, the latch 24 has an arc-shaped concave portion 24a fitted into the main body 16 of the pair of horizontal frames 7, 8 from above. As shown in FIG. 7, first and second guide pins 25 and 2 are provided at the base end of the latch 24.
6 are cantilevered in parallel with each other and at predetermined intervals up and down. A lock plate 27 is supported by the two guide pins 25 and 26 so as to be movable in the vertical direction. A long hole 27a guided by the first pin 25 is formed in an arc shape whose lower end is displaced toward the frame 21 side, and Slot 2 guided by pin 26
7b is displaced in the direction in which the lower end is separated from the frame 21. Therefore, the latch 24 is fitted to the main body 16 of the horizontal frames 7, 8 while the lock plate 27 is held at the unlocked position shown in FIG.
When the guide plate 5 and 26 and the long holes 27a and 27b guide it downward while drawing an arc, the lower end of the lock plate 27 goes under the main body 16 as shown in FIG. 9 is prevented from rising.
In the unlocked state shown in FIG. 7, the pins 25, 26 enter the bent ends of the long holes 27a, 27b, so that the lock plate 27 does not move downward due to its own weight.

In the above description, four pillars 1-4, four horizontal frames 5-8, and a scaffold unit as a minimum element constituted by one step 9 have been described. When sequentially connected as shown in FIG. 2, a scaffold structure having an arc shape as a whole is constructed.

In the scaffold structure constructed as described above, since the step 9 is formed in a trapezoidal shape, the cylindrical tank T
The step 9 can be provided in an arc shape along and at the same height. Therefore, operations such as construction of the tank T and maintenance and inspection on step 9 can be performed smoothly.

In the above-described embodiment, mounting caps 17 and 18 are fitted and fixed to the end of the horizontal frame main body 16.
Since the wedge-shaped members 19 and 20 are fixed to the members 17 and 18, when the wedge-shaped members 19 and 20 are engaged with or disengaged from the engagement fittings 11 to 14, the mounting caps 17 and 18 are hit with a hammer or the like. Damage of the horizontal frame body 16 by the hammer can be prevented.

Further, in the above-described embodiment, since the latch 24 having the recess 24a opening downward is attached to the side edge of the frame 21 in step 9, the recess 24a of the latch is attached to the horizontal frame 5. 8 can be easily carried out by fitting in Step 9.

The present invention is not limited to the above embodiment, but can be embodied as follows. (1) As shown in FIG. 9, a trapezoidal step 9 and a rectangular step 9A are alternately connected to construct an arc-shaped scaffold structure as a whole.

(2) In the above embodiment, the main body 1 of the horizontal frames 5 to 8 is used.
6, the mounting caps 17 and 18 are fitted and fixed, and the wedge-shaped fittings 19 and 20 are fixed by welding to the end surfaces of the caps. Forming the catch of the hammer of time. In this case, since the main body 16 does not have to be hit, the main body 16 is not damaged.

(3) In the above embodiment, the lock plate 27 is provided on the latch 24, but this is changed to a lock pin which is always urged to the lock position by a spring, though not shown.

The technical ideas other than the claims that can be grasped from the above embodiment will be described below together with their effects. The scaffolding structure according to claim 3, wherein the latch has a lock plate.

In the case of this scaffold structure, in addition to the function and effect of the above-described third aspect, it is possible to prevent the step 9 from rising from the horizontal frames 5 to 8.
Also, before Symbol engagement alloy tool 11-14 attached to the posts 1-4
In addition, the connecting structure constituted by the wedge-shaped members 19 and 20 attached to the horizontal frames 5 to 8 may be constituted by, for example, a fitting hole formed in the column main body and a connecting pin fitted in the fitting hole. Any material that can be attached and detached may be used.

[0029]

As described in detail above, the invention according to claim 1 uses a plurality of sets of scaffold structures formed in an arc shape.
Since the constructed scaffold structure is configured as an arc as a whole, a plurality of steps are held at the same height position, the traffic of workers is smooth, and various works of the cylindrical building can be performed smoothly. There is an effect that can be done.

According to the second aspect of the present invention, the mounting cap is fitted and fixed to the end of the horizontal frame main body, and the wedge-shaped member is fixed to this cap. By hitting the mounting cap with a hammer or the like when engaging or removing the wedge-shaped member with the engagement fitting, damage to the horizontal frame main body can be prevented.

According to the third aspect of the present invention, since the latch is attached to the side edge of the step, in addition to the effect of the first or second aspect, the concave portion of the latch is mounted on the horizontal frame. The fitting work of the step can be easily performed by fitting.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part of a building scaffold embodying the present invention.

FIG. 2 is a partial perspective view of a building scaffold.

FIG. 3 is a partially omitted perspective view of a support for a scaffold.

FIG. 4 is a partially omitted perspective view of a horizontal frame for a scaffold.

FIG. 5 is a front view showing a connection state between a support and a horizontal frame.

FIG. 6 is a perspective view showing a connection structure between a horizontal frame and a step.

FIG. 7 is a cross-sectional view of a non-locked state showing a coupling mechanism between a horizontal frame and a step.

FIG. 8 is a cross-sectional view of a locked state showing a coupling mechanism between a horizontal frame and a step.

FIG. 9 is a schematic plan view showing another example of the present invention.

[Explanation of symbols]

1-4: Prop, 5-8: Horizontal frame, 9: Step, 10: Prop body, 11-14: Engagement hardware, 11a-14a: Engagement hole, 16: Horizontal frame body, 17, 18: Mounting cap , 1
9, 20: wedge-shaped member, 21: frame, 24: latch, 2
5, 26: first and second connecting pins, 27: lock plate.

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04G 1/36 E04G 1/12 E04G 5/02 E04G 5/08

Claims (3)

(57) [Claims] 1. Four pillars and an engagement metal fitting provided on each pillar
And four horizontal frames connected sideways via a wedge-shaped member ,
At least a plurality of the horizontal frame are paired Shi supported lifting, and is located between air formed inside of each lateral frame away step out of the lateral frame
In the scaffold structure formed in an arc shape by using the above, the horizontal frame has a cylindrical main body and a lower part fixed to both ends thereof.
And wedge-shaped members extending in the
The wedge-shaped members of a pair of horizontal frames facing each other are
While tilting with respect to the central axis, the other pair of horizontal frames
Position the wedge-shaped member on the center axis of the horizontal frame body, and
Press-fit into the engaging hole of the provided fitting from above
A structured scaffold structure. 2. The method of claim 1, the horizontal frame is a cylindrical body, a cylindrical mounting cap that is fitted and fixed at both ends, Ru extends downwardly fixed to the end face of the mounting cap wedge < and the wedge-shaped member is provided on each of the columns.
Configured to press-fitted from above into the engagement hole of the engagement alloy tool was
Scaffold structure was. 3. A process according to claim 1 or scaffold structure hooking bracket is mounted with a concave portion that Ru engaged from above into the lateral frame on a side edge of the step in 2.