JPH1046807A - Bent framing body with variable curvature - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bent framing body utilized for various applications depending on the ideas, such as framing members for a dome-like structure or timbering work for concrete formwork for pouring concrete for forming a curved surface. SOLUTION: This framing body comprises a plurality of framing units A made of shape-steel each having an arbitrary cross-sectional shape or a cylindrical body of a predetermined length, a plurality of joint members B for coupling respective framing units A by coupling pins D1 in a manner for freely bending the pins in a longitudinal direction, and a combination of a plurality of fixing members bent to a certain angle for one set of neighboring framing units A, A. As a reinforcing and fixing means E for the fixing function of bent angle by bent angle fixing members, and reinforcing pins D3 is inserted in a slidable manner to a first long hole 21 and a second long hole provided in an intersecting form provided in the framing unit and the joint member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the use of a formwork for casting a curved surface of a concrete structure as a support material for withstanding the injection pressure of concrete, a dome-like structure, or the like. The present invention relates to a curved skeleton body having a variable curvature, which can be easily used as a curved skeleton material or the like for constructing.

[0002]

2. Description of the Related Art FIG. 17 shows a first conventional example of a method of constructing a formwork for driving a curved surface portion of a concrete structure. To construct a formwork, first, a formwork of a flat portion B of a structure is assembled by using a set of formwork plates 30 and 30 by a well-known formwork supporting method. Next, on this formwork,
The curved formwork 21 for casting the curved surface portion A is assembled as shown. Reference numeral 22 denotes a square member for assembling the formwork 21, and reference numeral 33 denotes a frame member for forming a curved surface. Then, in order to prevent the form 21 from being deformed by the pressure of the poured concrete, the form 2
A rectangular tubular shaped steel 34 is vertically disposed on the outer peripheral surface of the first steel plate 1 at a predetermined interval. A holding jig 35 having a curved surface 35a following the curved surface of the formwork 21 is applied to a plurality of locations at predetermined intervals in the vertical direction on the back surface of the group of shaped steels 34. Presser jig 35
Is a form tie (wedge-type fastener) 3 attached to the tip of a fastening bolt 36 projecting from the form plate 30 as a foothold.
7, the wedge 38 is driven into contact with the curved formwork 21 via the shaped steel 34.

FIG. 18 shows a second conventional example of the above method. In this case, a metal pipe 39 bent according to the curved surface of the curved mold 21 is used instead of the holding jig 35. The metal pipe 39 is pressed against the back surface of the curved formwork 21 via the shaped steel 34 using the fastening bolt 36 and the form tie (registered trademark) 37 as in the first conventional technique.

[0004]

According to the first conventional method, a large number of material costs and labor are required to produce a large number of holding jigs 35 each having a curved surface that accurately follows the curved surface of the curved formwork 21. And require. Needless to say, the holding jig 35 cannot be shared with other curved formwork 21 having a cast-in curved surface 35a having a different curvature, and even when it can be used repeatedly, it is bulky and difficult to store.

Further, instead of the holding jig 35, a metal pipe 39 is used.
According to the second conventional method, a large amount of labor and time are required to bend each pipe to a required curvature at a construction site. It is not easy to change the curvature of the pipe once bent. In addition, since the curved pipe is bulky, the transportation and storage costs are high, and of course, it cannot be diverted to a formwork with a different curvature of the casting surface, increasing the burden of unnecessary warehouse costs, etc. It was difficult to reduce.

[0006] In order to remedy such difficulties of the prior art,
The applicant of the present application can, for example, when casting a curved surface portion of a concrete structure, be able to use the same for formwork having a different curvature of the casting surface, and save time for storage and transportation for repeated use. Invented curved frames with variable curvature, which can be greatly reduced and can be conveniently used as curved frames for various structures, are disclosed in Japanese Patent Application Nos. 7-339271 and 8-347.
18 "and" Japanese Patent Application No. 8-120597 ". In the curved frame of the invention of the prior application, a plurality of frame units of a predetermined length are pin-connected in tandem using joint members, and the adjacent frame units are fixed to the joint members at an arbitrary bending angle. For this purpose, a configuration incorporating a refraction angle fixing member is provided.

However, there is still room for improvement in this curved frame. This means that as the number of frame units connected increases, the effect of the mounting accuracy at each connection point becomes conspicuous, and there is a tendency for the curvature to fluctuate under dynamic loads. . In addition, as the bending moment applied to the curved frame body increases, the amount of bending deformation also increases to a level that is not negligible.

However, if the thickness and thickness of each component of the curved skeleton are increased, the connection structure is complicated, and the processing accuracy is greatly improved, the excellent features of the curved skeleton are as follows.
Advantages such as simplicity of handling, simplicity and speed of changing the curvature ratio, and inexpensiveness are impaired.

Therefore, an object of the present invention is to provide a structure having the basic structure of the above-mentioned prior application without complicating the operation of changing the connecting structure and the curvature and increasing the weight, and increasing the manufacturing cost. Another object of the present invention is to provide a curved frame having a variable curvature in which the bending moment resistance is remarkably increased while pressing as much as possible.

[0010]

In order to achieve the above object, a variable-curvature curved frame body according to the present invention comprises a cylindrical body having a predetermined length or a shaped steel or the like having an arbitrary cross-sectional shape and a main body 1. And a plurality of joint members B for connecting each of the frame units A in a tandem manner so as to be mutually refractible by a connection pin D1, and a pair of adjacent frame units A,
A comprises a combination with a plurality of refraction angle fixing members C for fixing the refraction angle at an arbitrary refraction angle, and as the fixing reinforcement means E for reinforcing the refraction angle fixing function of the refraction angle fixing member C, The reinforcing pin D3 is slidably inserted into the first long hole 21 and the second long hole 22 provided in the frame unit A and the joint member B in an intersecting manner. The main body 1 is provided with pin holes 2 near both ends thereof, through which the connecting pins D1 are inserted. At both ends of the bending angle fixing member C, a predetermined distance from each pin hole 2 is provided. It is preferable to provide a pin hole 3 through which an assembling pin D2 for connecting the pins is inserted. The joint member B is composed of a channel-shaped metal fitting 5 that can be fitted or fitted inside the main body 1. Pin holes 6 for inserting the connecting pins D1 are provided near both ends of both side surfaces of the fitting member B, respectively. It is preferable that a bolt hole 7 is provided at the center. Refraction angle fixing member C
Is a channel-shaped metal fitting 1 that can be fitted inside the joint member B.
0 and the assembling pin D2
And a nut member 12 for screwing a push / pull bolt 13 inserted into the bolt hole 7 of the joint member B is preferably attached to the center of the top surface. The first elongated hole 21 is disposed in a direction in which the reinforcing pin D3 does not hinder the operation of changing the bending angle by the bending angle fixing member C, and the second elongated hole 22 is configured to change the bending angle. The operation in which the reinforcing pin D3 does not hinder the operation, and in the bending angle fixed state, the frame unit A subjected to the bending moment is caused to move around the connecting pin D1. The reinforcing pin D3 may be disposed in a direction to be blocked.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The curved frame of the present invention is described below.
An embodiment used for supporting a concrete form having a curved casting surface will be described with reference to FIGS. 1 to 14. As shown in FIGS. 1 to 4, the curved frame body of this embodiment has a plurality of rectangular tubular frame units A having a predetermined length, and these frame units A are mutually refracted by connecting pins D1. A large number of joint members B to be connected in a possible cascade and a large number of refraction angle fixing members C for refracting adjacent frame units A, A to an arbitrary refraction angle and fixing the refraction angle. It has a combined basic configuration.

Square tubular main body 1 constituting frame unit A
In this embodiment, the dimensions are 50 mm square and 300 mm in length. The main body 1 of this embodiment is made by bending a metal plate cut into the shape shown in FIG. 2 into the cross-sectional shape shown in FIG. The bottom surface 1d is a reinforcing rib, and this portion is spot-welded as necessary.

As shown in FIGS. 1 and 3, both ends of the top surface (in the figure) 1a of the main body 1 are notched over a length of about 40 mm, respectively, and corners of both side surfaces 1b, 1b are formed. The corner is cut into a shape in which a gentle slope and a curve are connected to form a notch portion a. As a result, the adjacent main bodies 1 and 1 can be refracted from each other, and the refraction angle fixing member C
Can be easily rotated.

A pin hole 2 for inserting a connecting pin D1 and a pin hole 3 for inserting an assembling pin D2 for assembling a refraction angle fixing member C are provided near both ends of both side surfaces 1b, 1b of the main body 1. Are provided at a predetermined distance in a penetrating manner, with the assembling pin D2 positioned outside and offset toward the bottom surface 1c. Arrows F1 serving as refraction angle display means are provided at both ends of both side surfaces 1b.

Further, near the respective ends of both side surfaces 1b, 1b, a predetermined length for slidably inserting a reinforcing pin D3 into an upper portion at a predetermined distance from the connecting pin D1 and the assembling pin D2, respectively. The first oblong vertical holes 21 are provided respectively. The orientation direction of the first elongated hole 21 is set such that the lower end thereof is inclined by a predetermined angle in a direction away from the pin hole 2.

The shape of the connecting pin D1, the mounting pin D2, and the reinforcing pin D3 are the same, and as shown in FIG. 3, the retaining ring 4 is removably fitted in an annular groove provided on the outer peripheral surface of the distal end. I'm wearing it.

The joint member B comprises a channel-shaped metal fitting 5 having a U-shaped cross section and having the shape shown in FIGS. The width of the channel-shaped metal fitting 5 is set to a size that can be slidably inserted into the inside of the main body 1 constituting the frame unit A. Both side surfaces 5a, 5a of the channel-shaped metal fitting 5 are formed in a substantially trapezoidal shape.
Are respectively provided in a penetrating manner. or,
A notch 5b is provided at the bottom to prevent the frame unit A from interfering with the assembly pin D2 when the frame unit A is rotated around the connection pin D1.

At the center of both side surfaces 5a, 5a, an angle scale F2 is vertically cut at a position facing the arrow F1. The arrow F1 and the angle scale F2 serve to notify the refraction angle between the adjacent skeleton units A, A. Further, a bolt hole 7 through which a push / pull bolt 13 described later is inserted is provided at a central portion of the top surface 5c, and reinforcing concave and convex strips are formed on both left and right sides thereof.

Further, a second elongated hole 22 having a predetermined length into which the reinforcing pin D3 is slidably inserted is provided in the main body 1 of the frame unit A at both left and right shoulder portions of both side surfaces 5a, 5a. First
A position intersecting with the long hole 21 is selected and provided. The crossing angle is set so as to be about 45 degrees when the refraction angle between the adjacent skeleton units A, A is zero.

The first elongated hole 21 and the second elongated hole 22 overlapped in an intersecting manner, and the reinforcing pin D3 slidably inserted into these two holes, the angle formed by the bending angle fixing member C. Fixing reinforcing means E for reinforcing the fixing function is provided.

The refraction angle fixing member C has the configuration shown in FIGS. Refraction angle fixing member C of this embodiment
Has a downwardly facing channel-shaped fitting 10 as a main body.
An assembly pin D is provided near both ends of both side surfaces 10a, 10a.
2, a somewhat elongated pin hole 11 is provided in a penetrating manner. A nut 12 as a nut member is fixed to the top surface 10b coaxially with a bolt hole b provided at the center thereof.

The channel-shaped fitting 10 is made by bending a metal plate punched into the shape shown in FIG.
The nut 12 is, as shown in FIG.
This is for screwing the push / pull bolt 13 inserted into the bolt hole 7 of FIG.

Next, a description will be given of an example in which the operation of the curved frame is applied to the conventional form support shown in FIG. The curved skeleton serves as a substitute for the curved metal pipe 39 for fastening the curved formwork 21 illustrated in FIG.

In order to assemble a curved frame having a desired length and curvature, first, of the plurality of frame units A prepared, as shown in FIG.
6 and a home tie 37, etc., are fixed behind the one end side of the curved formwork 21 in a press-contact state. Next, a second frame unit A is provided on the right (or left) end side of the frame unit A.
Are connected using the joint member B and the two connection pins D1.

At this time, the refraction angle fixing member C is also mounted so as to straddle between the two framing units A using two mounting pins D2, as shown in FIGS. . Further, the reinforcing pin D <b> 3 is inserted into the first and second long holes 21 and 22 of the frame unit A and the joint member B which are overlapped in a cross shape, and is stopped by the retaining ring 4.

At this time, when the push / pull bolt 13 inserted into the pin hole 7 of the joint member B is screwed into the nut 12, the two frame units A, A are shown in FIG. Thus, they can be connected in a straight line.

From this state, as shown in FIG.
When the pull bolt 13 is rotated in a direction of being screwed into the nut 12, the two skeleton units A, A are rotated around the two connecting pins D1 in the downward direction in the figure, respectively, and the two skeleton units A, A are rotated. The units A, A are bent in a C shape. As a result, the second frame unit A is also connected to the curved formwork 21 via the shaped steel 34.
Can be brought into contact behind.

In the case where the curved mold 21 is curved in a concave shape, as shown in FIG. The frame units A, A to be bent can be bent in an inverted C-shape to follow the recessed form surface.

At the time of this turning operation, the reinforcing pin D3 inserted into the first long hole 21 and the second long hole 22 has the second long hole because the long holes are oriented in a specific direction. It is pushed by the hole edge of the hole 22 and is slid in both long holes in a direction that does not hinder the rotation of the frame unit A (see FIGS. 12 and 13). Therefore, the reinforcing pin D3 does not hinder the rotation operation.

However, when a large bending moment is applied to the connected frame unit group A (curved frame body) in the bending direction for some reason, the reinforcing pin D3 is connected to the connecting pin D1 and the assembly pin. In cooperation with the pin D2, it plays a role of firmly receiving this bending moment.

That is, as can be understood from FIGS.
The orientation direction of the second elongated hole 22 is set to be substantially orthogonal to the directions f and g in which the frame unit A is to be rotated left or right around the connecting pin D1. Therefore, in a state where the refraction angles of the adjacent frame units A, A are fixed by the refraction angle fixing member C, even if a large bending moment is applied to the frame unit A, FIG.
As shown in 2 to 14, the reinforcing pins D3, which are hooked on both edges of the second elongated hole 22 in the longitudinal direction, reliably prevent this rotation.

In other words, the reinforcing pin D3 cooperates with the connecting pin D1 and the assembling pin D2 to make the mutually connected portion of the frame unit A and the joint member B much more flexible than the two-point support. It plays the role of providing a three-point support state where deformation strength can be obtained. In addition, the above-described connection structure using the three-point support also has an effect of compensating for the insufficiency of assembling accuracy of each pin connection portion.

Next, next to the right of the second frame unit A, 3
If the second frame unit A (not shown) is connected and the push / pull bolt 13 of the bending angle fixing member C interposed between the second frame unit A and the second frame unit A is rotated in the same manner as described above, This third frame unit A is also abutted behind the curved formwork 21.

Thereafter, by repeating the same operation as above,
All the framing units A constituting the curved framing body can be uniformly brought into contact with the entire curved back surface of the curved formwork 21. In the course of this series of connection work, the fastening bolt 3
6. The work of sequentially mounting the home ties 37 at appropriate intervals is also performed in parallel. At this time, the above-mentioned contact state is firmly fixed (fastened) by driving the wedge 38 into the home tie 37. In this manner, the support using the curved frame can be performed skillfully and quickly even by an unskilled worker.

If the used curved skeleton is removed from the form while being connected in a curved shape, it can be used as it is for supporting a form of the same shape. In the case of storing for a while after use, if the push / pull bolts 13 at the connection points of the respective frame units A are respectively rotated to straighten the entire curved frames, the curved frames are stacked in a bulkless state. I can do it.

FIG. 15 shows a second application example in which the curved frame of the present invention is used as a frame for a dome-shaped structure. Reference numeral 51 denotes a base frame formed by connecting a number of frame units A in a ring shape having a predetermined diameter.
Reference numeral 52 denotes a plurality of frame units A which are approximately 1/4 of a predetermined length.
It is a roof frame made by connecting in an arc shape.

Base frame 5 curved to a desired curvature
1 and the roof frame 52 can be assembled easily and quickly by the same procedure as in the first embodiment.
The length and thickness of the main body 1 constituting the framing unit A may be determined to be optimal dimensions suitable for the size of the dome.

To connect the lower end of the roof frame 52 to a predetermined position on the base frame 51 at equal intervals, a connecting bracket 53 is used. To connect the upper ends of the roof frames 52 integrally, the zenith is used. A metal fitting 54 is used.

FIG. 16 shows a third application example in which the curved frame of the present invention is used for a frame material of a roller conveyor. Conveyor lines installed in factories, product distribution bases, and the like often need to be installed in a curved or S-shaped manner depending on the installation location. In this case, it is extremely troublesome to install the frame supporting the roller group in a bent state.

Therefore, if the curved frame of the present invention is used as a frame material for a roller conveyor, the time and cost required for manufacturing and installing the frame can be greatly reduced. Of course, the curvature of the conveyor line can be freely changed as needed after the line is installed.

That is, as shown in the plan view of FIG. 16, each of the conveyor units 61 constituting the conveyor line 60
Are the main body 1 of the frame unit A as left and right frame members.
Is diverted. 62 is a roller. In the main body 1 of this embodiment, for the convenience of assembling the roller 62 and the like, a channel-shaped material is used instead of the rectangular cylinder, and the length is appropriately set according to the curvature of the conveyor line.

In order to assemble a conveyor line 60 having an arbitrary curvature and length by using a plurality of the conveyor units 61, one of the main bodies 1, 1 serving as frames on both left and right sides of each conveyor unit 61 is required. If the main bodies 1 are connected in the same manner as in the first embodiment,
The curvature of the conveyor line 60 is adjusted by the pull bolt 13.
It can be set arbitrarily for each part of the entire length.

However, as can be understood from FIG. 16, the main bodies 1 on the other side are slightly spaced from each other.
Therefore, the other side is connected via a connecting member 63 instead of using the joint member B and the bending angle fixing member C.

In the above configuration, the object of the present invention can be achieved even if the detailed structure is appropriately changed in design. For example,
The configuration of the frame unit A, the joint member B, the refraction angle fixing member C, etc. may be arbitrarily changed according to each use condition as long as the function described in each claim is achieved.

[0045]

As is apparent from the above description, the variable curvature curved frame according to the present invention has various excellent practical effects as listed below. (A) The push / pull bolt screwed to the bending angle fixing member is
The curvature can be easily and quickly changed according to the individual use condition of the curved frame only by appropriately rotating in the forward or reverse direction. (B) Since the frame units are connected to each other by a simple pin connection, they have excellent connection strength, can withstand severe repeated use, and are economical. (C) Since the three pins of the connecting pin, the assembling pin, and the reinforcing pin cooperate with each other in a three-point support state,
It can sufficiently withstand a large bending moment, and is unlikely to be deformed by bending. (D) When used for supporting a curved formwork or the like, the bending direction can correspond to both outward and inward directions. (E) The entire length of the curved frame can be freely expanded and contracted only by changing the number of frame units added. (F) Since there are no welding points requiring skill, almost no variation in quality can be achieved. (G) Depending on the device, it can be variously used as a frame material of a structure having a curved portion, in addition to the applications shown in the embodiments. This field of application is not limited to the fields of architecture and civil engineering.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the present invention, and is a front view of a state in which two frame units are connected to each other and a part of a curved frame is assembled.

FIG. 2 is an exploded view of a main body constituting the framing unit A;

FIG. 3 is a partially exploded perspective view showing the connection structure of the frame units.

FIG. 4 is a longitudinal sectional view taken along the line XX of FIG. 1;

FIG. 5 is a front view of the channel-shaped fitting 5;

FIG. 6 is a plan view of FIG. 5;

FIG. 7 is a front view of the channel-shaped metal fitting 10;

FIG. 8 is a plan view of FIG. 7;

FIG. 9 is a side view of FIG. 7;

FIG. 10 is a side view of the push / pull bolt.

FIG. 11 is an exploded view of the channel-shaped metal fitting 10;

FIG. 12 is a partially broken front view showing the connection structure of the frame units.

FIG. 13: Same as above, refraction angle fixing member C and fixing strengthening means E
It is a 1st explanatory view of the effect | action of.

FIG. 14: Same as above, refraction angle fixing member C and fixing strengthening means E
It is a 2nd explanatory view of the effect | action of.

FIG. 15 shows a second application example in which the curved frame of the present invention is used as a frame of a dome-shaped structure, and is a sketch of the dome frame.

FIG. 16 is a partial plan view of a conveyor line, showing a third application example in which the curved skeleton body of the present invention is applied to a frame material of a roller conveyor.

FIG. 17 is a partial cross-sectional view illustrating a first conventional example.

FIG. 18 is a partial cross-sectional view illustrating a second conventional example.

[Explanation of symbols]

 Reference Signs List A Frame unit B Joint member C Refraction angle fixing member D1 Connecting pin D2 Assembling pin D3 Reinforcement pin E Fixing and reinforcing means F1 Arrow F2 Angle scale 1 Main body 1a Top surface 1b Side surface 1c Bottom surface 1d Reinforcing rib 2,3 Pin hole 4 Locking Pin 5 Channel-shaped bracket 5a Side surface 5b Notch 5c Top surface 6 Pin hole 7 Bolt hole 10 Channel-shaped bracket 10a Side surface 11 Pin hole 12 Nut (nut member) 13 Push / pull bolt 21 First elongated hole 22 Second elongated hole 51 Base frame 52 Roof frame 53 Connecting fitting 54 Zenith fitting 60 Conveyor line 61 Conveyor unit 62 Roller 63 Connecting member a Notch b bolt hole

Claims (5)

[Claims] 1. A plurality of skeleton units A having a main body 1 made of a cylindrical member having a predetermined length or a shaped steel having an arbitrary cross-sectional shape, and each skeleton unit A is cascaded so as to be mutually refractible by a connecting pin D1. And the adjacent joint members B
It consists of a combination of a plurality of refraction angle fixing members C for fixing the frame units A, A of each set at an arbitrary refraction angle, and for reinforcing the refraction angle fixing function of the refraction angle fixing member C. A curvature characterized in that a reinforcing pin D3 is slidably inserted into a first elongated hole 21 and a second elongated hole 22 provided in the frame unit A and the joint member B in an intersecting manner as the fixing reinforcement means E. Variable curved skeleton. 2. The main body 1 is provided with pin holes 2 near both ends thereof for inserting the connecting pins D1, respectively.
An assembling pin D2 for connecting both ends of the bending angle fixing member C to the outside at a predetermined distance from each pin hole 2.
The curved frame body with variable curvature according to claim 1, further comprising a pin hole (3) through which the hole is inserted. 3. The joint member B includes a channel-shaped metal fitting 5 that can be fitted or fitted inside the main body 1, and a pin hole 6 through which the connecting pin D1 is inserted near both ends of both side surfaces thereof.
3. A curved frame body having a variable curvature according to claim 1 or 2, wherein a bolt hole 7 is provided in a central portion of a top surface thereof. 4. The refraction angle fixing member C comprises a channel-shaped metal fitting 10 which can be fitted into the joint member B, and has pin holes 11 near both ends on both sides thereof, through which the mounting pin D2 is inserted. The nut member (12) for screwing a push / pull bolt (13) inserted into the bolt hole (7) of the joint member (B) is attached to a central portion of the top surface. A curved skeleton with variable curvature. 5. The first elongated hole 21 is disposed in a direction in which the operation of changing the angle of refraction by the angle-of-refraction fixing member C is not hindered by the reinforcing pin D3. The reinforcing pin D3 does not hinder the angle changing operation, and
In the bending angle fixed state, the frame unit A to which the bending moment is applied is disposed in a direction in which the reinforcing pin D3 prevents a movement of the frame unit A to be rotated around the connecting pin D1. The curved skeleton body with variable curvature according to any one of claims 1 to 4, characterized in that: