JP3510921B2 - Method of closing end of flat deck plate and closing device used therefor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat deck plate having an upper flange, a web projecting to one surface side of the upper flange, and a rib formed of a lower flange at the front end of the web. The present invention relates to an end closing method for crushing and forming the rib on the upper flange side at the end portion of the above, and a closing device used therefor.

[0002]

2. Description of the Related Art The above-mentioned flat deck plate has been widely used as a formwork material for concrete structures such as steel structures, reinforced concrete structures, floors and roof slabs. The ribs are completely crushed at both ends in the length direction and bridged between the beams in a state that the ribs are completely crushed, so that the pouring concrete can be prevented from flowing out and the slab thickness between the beams can be limited.

Therefore, when the ribs are crushed, for example, as shown in the cross-sectional view of the use posture in FIG. 8 (a), the upper flange UF and the web projecting to one surface side of the upper flange UF at a right angle thereto. A flat deck plate having a rib L formed of W and a lower flange LF of a triangular contour located at the tip of the web W, and the upper flange UF is brought into surface contact with the flat flange plate at both end portions in the longitudinal direction thereof. In the state of being fixed to the receiving mold, the indenting load f is evenly applied to the entire lower surface of the lower flange LF, so that the end portion of the rib L is extended to a predetermined length and enlarged sectional view is shown in FIG. 8 (b). It was crushed and deformed into a flat shape as shown in.

[0004]

Many of the conventional flat deck plates are used by straddling between beams positioned at intervals of about 3.2 m, and the rigidity required for the flat deck plate is not sufficient. Since it is relatively small, for example, when it is manufactured from a steel plate having a thickness of 0.8 mm, the protruding height from the upper flange UF of the rib L is about 75 mm. From this, even if the end portion of the rib L is uniformly crushed and deformed as described above, no particular problem occurs.

By the way, recently, due to the floor design,
There is a strong demand for a flat deck plate capable of supporting a beam distance of up to about 4 m, which is why the applicant
We have developed a high-rigidity flat deck plate that can satisfy the requirements without changing the thickness, in other words, keeping the weight small. This flat deck plate has a rib height of 100 mm, which was 75 mm in the past, and this allows the rigidity to be greatly increased compared to the conventional flat deck plate. That is, with a plate thickness of 0.8 mm, it is possible to obtain a section coefficient equivalent to that of a conventional flat deck plate with a thickness of 1.2 mm, and to obtain a second moment of area larger than that with a thickness of 1.6 mm. be able to.

However, in this high-rigidity flat deck plate, the protruding height of the rib is 25 mm higher than that of the prior art, so that the end portion of the rib is the same as that of the prior art. When the crush deformation is caused by the uniform pushing load over the entire lower surface, even if the operating condition of the load is constant, due to the buckling of the rib due to the large ratio of the rib height to the lower flange width, The collapsed mode, the deformed mode, and the like change with each crush. This means that not only can a fixed crushed state of the rib end portion not be brought about, but also the number of overlapping plates at the crushed end portion becomes 7 to 9, and in many cases, the upper flange is There is an inconvenience that openings are formed in the base portions of the ribs that are formed by bending and the bent portions are separated from each other, and the upper flanges that are separated by the ribs are separated from each other. In particular, an increase in the number of overlapping plates leads to an increase in the thickness of the closed end, which results in the loss of concrete on the beam.
When laying flat deck plates, the deck plates will interfere with each other.

The present invention has been made as a result of studies made to solve the problems of the prior art, and the object of the present invention is to provide a conventional flat deck having a low rib protrusion height. Not only can it be applied to plates, but when it is applied to high-rigidity flat deck plates with high rib height, the crushing form of the rib end parts is always made almost constant, and the number of overlapping plates at the crushing end part is A method for closing an end portion of a flat deck plate and a closing device used therefor capable of sufficiently preventing the upper flanges spaced apart from each other from being separated from each other by a small number of pieces, for example, about five pieces. Is.

[0008]

According to the method of closing an end of the present invention, in particular, the pushing load is biased only on one side of the lower flange so that the rib falls in a specific direction. Of the rib, which is guided or brought to the start of deformation, and is then subjected to a pushing load over the rib that is guided to deform or has started to deform, and is always a stable form based on the collapse of the rib in the specific direction. It brings about the crushing of ribs.

The end closing device used for carrying out the method of the present invention comprises a receiving die that makes surface contact with the upper flange, and a plate retainer that presses the upper flange against the receiving die on at least one side of the rib. A pressing die capable of advancing and retracting with respect to the receiving die at a position corresponding to the rib, in which one of the lower flanges of the molding portion provided at the tip of the pressing die abuts on one side. Part is urged in the protruding direction by spring means that can be a spring, rubber or rubber-like elastic body, air spring, air cylinder, hydraulic cylinder, etc. It is a projecting one.

In this apparatus, preferably, one pressing die is provided with a plurality of molding portions which are located apart from each other by the plate retainer and which simultaneously crush and deform a plurality of ribs, and more preferably one pressing die. In the flat deck plate processing line, there are provided molding portions that are located at intervals in the flow direction of the flat deck plate processing line and that simultaneously crush and deform the front end portion and the rear end portion of each rib of different flat deck plates. Here, more preferably, a rib deformation restraining means that allows the rib to be fitted is provided at a position adjacent to the plate pressing member and the pressing die.

[0011]

According to the method of the present invention, for example, with the upper flange positioned and fixed on the lower mold as the receiving mold,
By applying a biased indentation load to one side of the lower flange to determine the direction in which the rib, particularly the web, collapses, the subsequent indentation load on the entire rib keeps the rib constant. It will be crushed and deformed in the form, even if it is a rib with a height of 100 mm,
The number of stacked plates can be reduced to five. Therefore, in addition to being able to effectively reduce the load required for crushing the ribs, the thickness of the crushed portion can be made sufficiently thin, and the risk of concrete damage at the beam portion can be eliminated. Moreover, here, by positively tilting the ribs in a certain direction, it is possible to prevent the upper flanges, which are spaced apart from the ribs, from being separated from each other, so that when the flat deck plates are laid, interference between the deck plates is prevented. The fear can be removed.

In the apparatus of the present invention, the upper flange is placed on the lower mold as the receiving mold, and the plate holder is lowered onto the upper flange to clamp the upper flange. For example, insert a pressing die between two plate holders, and first, of the molding part of the pressing die,
The part biased by the spring means is brought into contact with one side of the lower flange to guide or bring about the start of the collapse of the rib, especially the web, based on the pushing deformation of the contact part. , Then, by causing the other part of the forming part to also abut on the rib under the subsequent advancing operation of the press die, a pushing load is applied to the entire rib to promote its crushing deformation, and finally , The force exceeding the spring force of the spring means, in other words, by pushing the entire molding portion as a unit under the condition that the part of the molding portion is completely retracted against the spring force, The inventive method can be carried out easily and smoothly. Here, it is possible to change the closing mode of the rib by selecting the spring force of the spring means.

By the way, in this apparatus, when one pressing die is provided with a plurality of molding portions which are located apart from the plate retainer, end portions of a plurality of ribs extending to one flat deck plate. Can be crushed and deformed at the same time by one stroke of the push die, and one push die is positioned at intervals in the flow direction of the flat deck plate processing line, and each of the different flat deck plates can be deformed. If each forming part that deforms the rib is provided, the rear end rib of the flat deck plate of a predetermined length located on the front side and the flat part located on the rear side are formed by one stroke of the pressing die. It is possible to bring about crushing deformation with the tip ribs of the deck plate at the same time. Further, when a rib deformation restraint means is provided at a position adjacent to the plate retainer and the pressing die, when the end portion of the rib is crushed and deformed, the influence of the deformation spreads to a portion that does not require crushing, Rib bend in that part,
It is possible to effectively prevent falling and other deformations.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional view exemplifying the apparatus according to the present invention as viewed from the flow direction of a flat deck plate processing line, and FIG. 2 is a vertical sectional view taken along the line AA of FIG. In this example, the fixed lower mold 1 is a receiving mold that comes into surface contact with the upper flange, and each of the plate holders 2 that press the upper flange on the fixed lower mold has ribs 3 shown by phantom lines in the drawing.
And the fixed lower die 1 can be moved up and down with respect to the fixed lower die 1 at the same time, and further, the pressing die 4 that moves back and forth with respect to the fixed lower die 1 between the plate holders. Is connected to the movable upper die 7 via the mounting plate 5 and the connecting plate 6. Further, here, the tip end portion of the pressing die 4 is a molding portion 8, and a part 8a of the molding portion 8 that abuts on either side of the upper flange 9 is urged in the protruding direction by the spring means 10. . Therefore, this part
As long as a pressing force that exceeds the spring force of the spring means 10 does not act on the end surface of the spring 8a, the spring 8a projects downward from the other molded portion 8b by a predetermined amount. Here, a part 8a of the molding portion 8 is formed by the spring means 10 which is a coil spring in the figure.
In addition, the head of the bolt 12 is engaged with the guide block 11 attached to the movable upper die 7 so as to be vertically displaceable, and the tip of the bolt 12 is engaged with the upper end block 13a of the guide pin 13.
, And the coil spring 10 arranged around the bolt 12 is seated on both blocks 11 and 13a so that the compression reaction force of the coil spring 10 acts on both of them, and Guide pin inserted in 4
This is performed by screwing the tip of the shaft portion 13b of 13 onto the part 8a of the molding portion 8. According to this, the advancing limit position of the part 8a of the molding portion 8 is due to the contact between the guide book 11 and the head of the bolt 12, and the retracting limit position of the part 8a is the indentation with the upper surface of the part 8a. The contact with the die main body portion will identify each.

In this example, the urging mechanism as described above is arranged at two positions before and after the pressing die 4 as shown in FIG. 2, but it is arranged at three or more positions. On the other hand, on the other hand, as long as the smooth forward / backward displacement of the part 8a of the molding portion 8 can be ensured, it can be arranged at only one position. Further, in the illustrated example, the spring means 10 which is a coil spring may be constituted by a combination of disc springs.

By the way, reference numeral 1a in the drawing denotes a recess which is provided in the lower mold 1 and allows the crushed and deformed rib 3 to escape. By the recess 3a escaping, the upper flange of the flat deck plate As a result, the rib-side surface of the rib can be set on a beam or the like in a stable posture.

The operation of the apparatus constructed as described above, in other words, the method of closing the end of the present invention will be described below with reference to the schematic vertical sectional view shown in FIG. First, the flat deck plate 14 is placed on the fixed lower mold with its rib 3 having a height of 100 mm facing upwards, and its upper flange 15 is brought into surface contact with the fixed lower mold 1, where The pushing die 4 is lowered onto the upper flange, and the upper flange 15 is sandwiched and fixed between the fixed lower die 1 and the pushing die 4, and then the pushing die 4
To lower. As a result, the molding part 8 of the pressing die 4
, Part 8a urged by the coil spring 10
As shown in FIG. 3 (a), it abuts only one side of the lower flange 9 and causes a local deformation of the rib 3, which results in a specific orientation of the rib 3, and in particular of its web 16. The onset of the collapse into is guided or brought about, by the subsequent abutment over the ribs 3 by the entire forming part 8 of the web 16, as shown in FIG.
In addition to always causing a deformation in a fixed direction, the deformation of the lower flange 9 in a substantially fixed manner is also provided. Here, the deformation mode of the web 16 and the lower flange 9 has a relatively large influence depending on the spring force of the coil spring 10, in other words, when the part 8a of the molding portion 8 reaches its retracted limit position. Will be received.

Such deformation is continued until the pushing die 4 reaches its lower limit position, and when the pushing die 4 reaches its lower limit position, the forming portion 8 urged by the coil spring 10 is pressed. 8a is in the retracted limit position as shown in FIG. 3 (c), and causes the rib 3 to be crushed in cooperation with the other molding portion 8b.

In the figure, two upper flanges 15 are sandwiched and fixed on both sides of the rib 3, but due to the molding of the flat deck plate 14, one of them is particularly fixed. With respect to the rib 3 located at the side end portion, the upper flange 15 is present only on one side thereof (see FIG. 8 (a)). Therefore, in this case, with only one upper flange 15 being fixed, it is unavoidable to perform the crushing molding as described above, but it is still possible to perform the same crushing as described above. , Confirmed by experiments.

At the end portion of the rib 3 which is crushed and closed as described above, for example, the number of stacked plates can be always five. Therefore, as described above, the crush load can be effectively reduced, and the risk of concrete damage at the beam portion can be sufficiently eliminated. Further, here, by positively inclining the ribs 3 in a specific direction, the respective upper flanges 15 that are located apart from the ribs 3 are separated from the bent base position of the ribs 3 or on one side. It is possible to effectively prevent it from being biased, so when laying a flat deck plate,
The risk of interference between deck plates can be eliminated.

FIG. 4 is a schematic vertical sectional view showing another example of the invented device, which is one pressing die 4 and one plate pressing member 2.
By providing two molding portions 17 and 18 which are spaced apart from each other, the end closing processing can be simultaneously performed on the flat deck plate 14 having the two ribs 3. In addition, in the place shown in the figure, spring-biased,
The parts 17a and 18a of the molding parts 17 and 18 are arranged at the positions most distant from each other, but they can be arranged close to each other, and one of them can be placed on one side. They can also be provided close together. By the way, in order to efficiently perform the end closing processing of the flat deck plate having three or more ribs with one downward stroke of the pressing die, the pressing die is provided with a number of forming parts according to the number of ribs. It is preferable to provide.

FIG. 5 is a schematic plan view showing still another example of the invented apparatus. This is an example of the apparatus shown in FIG.
A position adjacent to the plate retainer 2 and the pressing die 4, here,
At the position adjacent to the insertion side of the flat deck plate 14,
Deformation restraining means for the rib 3 that allows the rib 3 to fit therein
19 is provided. The deformation restraint means 19 includes ribs 3
In addition to an integral structure having a through hole corresponding to the outer ring portion shape, it is also possible to use a split type that defines a space corresponding to the outer ring portion shape of the rib 3 when closed. Such deformation restraint means 19 is formed by inserting the ribs 3 of the flat deck plate 14 therethrough.
When the end portions of the ribs 3 are closed by the molding parts 17 and 18, the effect of the crushing deformation of the ribs 3 is prevented from reaching unnecessary portions, and each rib 3 is accurately held in its initial shape. To do. By the way, it goes without saying that the deformation restraint means 19 can be applied to the devices shown in FIGS. 1 and 2 as well.

FIG. 6 is a schematic line plan view showing still another embodiment of the invented apparatus.
In addition to the above, the ribs 3a, 3 of the different flat deck plates 14a, 14b are spaced apart in the flow direction F of the flat deck plate processing line.
The molding parts 20 and 21 for simultaneously deforming the front end part and the rear end part of b are provided. According to this, one pressing die 4 has four molding parts 17, 18 and 20, 21. Will have. By the way, each of the molding portions 17, 18, 20, and 21 here has a portion urged by the spring means and a molding portion as the remaining portion, as in FIGS. 1 to 5. Note that in this example,
It is also possible to provide the molding parts 17 and 20 in one press die and the molding parts 18 and 21 in the other press mold separately, which also results in the flat deck plate located on the front side. It is possible to simultaneously perform the closing processing on the rear end portion of the rib 3b of the rib 14b and the tip end portion of the rib 3a of the flat deck plate 14a located on the rear side.
Further, reference numeral 22 in the drawing denotes a stopper that can project into the conveyance path of the flat deck plate and can be retracted therefrom. As shown in FIG. Of the flat deck plates 14a, 14b, which are carried in from the rear side and the front side, below the molding portions 17, 18 and 20, 21 of the above, and function to position them.

Such an end closing device can be used, for example, as follows. It is assumed that deck plate transporting devices, such as conveyors, which are independent of each other, are installed on the front side and the rear side of the device.
First, the flat deck plate 14b on the front side is fed back by the conveyor, and when the rear end of the flat deck plate 14b is detected by the sensor incorporated in the device, the stopper 22 is raised and the conveyor is decelerated and stopped sequentially. The flat deck plate 14b is preferably positioned so that its rear end just abuts on the stopper 22 or at a position slightly in front of it. Next, the flat deck plate 14a on the rear side is sequentially fed by a conveyor,
When the sensor detects the leading edge, the conveyor is decelerated and stopped, and this is also preferably positioned at a position where the leading edge abuts on the stopper 22 or a position slightly before this. Here, it is also possible to end both of the above-mentioned operations at the same time by operating the respective conveyors together. After that, each plate holder 2
The upper flange 15 is clamped and fixed by the above, and the pressing die 4 is descended in order, whereby the ribs 3a, 3b are crushed and deformed by the respective molding portions 17, 18 and 20, 21.

In this way, after the two flat deck plates 14a and 14b are simultaneously subjected to the end closing processing, the plate retainer 2 and the pressing die 4 are raised and the stopper 22 is displaced downward. By the operation of both conveyors, the front flat deck plate 14b is carried out and the rear flat deck plate 14a is transported to the front side, and thereafter, the rear end portion of the flat deck plate 14a transported to the front side. Then, the closing processing for the other flat deck plate or the leading end portion newly carried in to the rear side is performed in the same manner as described above. In addition,
In this case, the rear flat deck plate 14a
When transporting to the front side of the
When positioning directly under 0 and 21, the subsequent positioning operation for the flat deck plate 14a is unnecessary.

[0026]

As is apparent from the above description, according to the method of the present invention, even if the height of the rib of the flat deck plate is increased, the rib is always crushed into a substantially constant shape. As a result, it is possible to sufficiently reduce the number of overlapping plates at the crushed portion, reduce the load required for crushing, and eliminate the risk of concrete damage at the beam portion. Moreover, in this case, by collapsing the ribs in a certain direction, it is possible to prevent the upper flanges located apart from each other from being separated from each other,
The flat deck plate laying work can be facilitated. Further, according to the invention device, the invention method can be implemented extremely easily and smoothly.
Incidentally, in the invention device, when a plurality of molding parts are provided in one pressing die, the efficiency of the closing work can be increased,
When the rib deformation restraint means is provided, it is possible to prevent unnecessary deformation of the rib due to the blockage of the end portion.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view illustrating an invention device.

FIG. 2 is a vertical sectional view taken along the line AA of FIG.

FIG. 3 is an operational process diagram of the apparatus shown in FIGS. 1 and 2.

FIG. 4 is a schematic vertical sectional view showing another example of the invention device.

FIG. 5 is a schematic plan view showing another embodiment.

FIG. 6 is a schematic line plan view showing still another example.

FIG. 7 is a longitudinal sectional view of a main part of FIG.

FIG. 8 is a cross-sectional view of a flat deck plate.

[Explanation of symbols]

1 fixed lower mold, 1a hollow 2 pressure plate 3 ribs 4 push plate 5 Mounting plate 6 connection plate 7 Movable upper mold 8, 17, 18, 20, 21 Molding part 8a, 17a, 18a, 20a, 21a part 8b, 17b, 18b Molded part 9 Lower flange 10 Spring means (coil spring) 11 Guide block 12 volt 13 Guide pin 14 flat deck plate 15 Upper flange 16 Web 19 Deformation restraint means 22 Stopper

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B21D 19/00 B21D 19/08 B21D 47/00 E04B 5/40

Claims (5)

(57) [Claims] 1. A flat deck plate having an upper flange, a web protruding toward one surface side of the upper flange, and a rib made of a lower flange located at the front end of the web, wherein the rib is moved to the upper flange side. A method of closing a crushed end part, firstly, biasing the indenting load only on one side of the lower flange to cause the indenting direction of the rib to be specified, and then the indenting load over the entire rib. A method for closing an end portion of a flat deck plate, which is characterized by causing a rib to be crushed. 2. A flat deck plate having an upper flange, a web protruding toward one surface of the upper flange, and a rib formed of a lower flange at the front end of the web, wherein the rib is moved to the upper flange side. An end closing device for collapsing, arranging a receiving die that makes surface contact with the upper flange, and providing a plate retainer for pressing the upper flange to the receiving die on at least one side portion of the rib, and At a position corresponding to the rib, a pressing die that can be moved forward and backward with respect to the receiving die is provided, and a part of the molding portion provided at the tip of this pressing die that abuts on one of the side portions of the lower flange, An end closing device for a flat deck plate, characterized by being biased in a protruding direction by a spring means. 3. The end portion of the flat deck plate according to claim 2, wherein the pressing die is provided with a plurality of molding portions that are located apart from the plate retainer and that crush and deform a plurality of ribs at the same time. Occlusion device. 4. The push die is positioned at intervals in the flow direction of the flat deck plate processing line, and the front end portion and the rear end portion of each rib of different flat deck plates are simultaneously deformed. An end closing device for a flat deck plate according to claim 2 or 3, wherein a molding portion is provided. 5. The rib deformation restraint means for allowing the rib to be fitted is provided at a position adjacent to the plate retainer and the pressing die, and the rib deformation restraint means is provided. End closure device for flat deck plate of.