JP2007118020A - End-closed deck plate working device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an end-closed deck plate working device capable of preventing formation of a multi-folded portions of the large overlapping number in a center part of the width direction of a ridge face when forming an end-closed beam placement part by squeezing a longitudinal end of a deck plate 1 by upper and lower dies 17, 14. <P>SOLUTION: A fold guide pin 30 which is brought into contact with a ridge face prior to the upper die 17 to depress the ridge face 2 when depressing the upper die 17 by a press machine is provided on a part of the upper die 17 corresponding to the center position in the width direction of the ridge face at a fore-end of the deck plate. When the upper die 17 squeezes the ridge face 2, the fold guide pin 30 is brought into contact with a center portion of the ridge face prior to the upper die 17 to depress the center portion. Since the fold guide pin performs the guide effect of providing the directionality to the ridge face folding pattern, the fluidity of a material is smoothly ensured, and the consistent folding of the small overlapping number is performed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  In this invention, a horizontal crest surface and a trough surface are continuously sloped to form a trapezoidal corrugated cross-sectional shape. The present invention relates to an end closed deck plate processing apparatus to be formed.

As shown in FIG. 5, a deck plate 1 in which a horizontal peak surface 2 and a valley surface 3 continuously form a trapezoidal corrugated cross-sectional shape on a slope 4 is widely used as a discarded formwork when a concrete floor is constructed. .
When this type of deck plate 1 is used as it is as a formwork without closing the end (the deck plate 1A in FIG. 10 (a)), the concrete flows out from the end opening (the lower part of the mountain surface 2). Therefore, the end opening is closed with a small cover plate, or an end closed (hereinafter referred to as Enclo) deck plate as shown in FIGS. Is used.

The deck plate 1B in FIG. 10 (b) forms a beam mounting portion 5B that closes the end portion by crushing the end portion in the length direction of the deck plate from above (the mountain surface 2 is on the valley surface 3 side). It is a normal Enclo deck plate.
In the deck plate 1C of FIG. 10 (c), the end portion of the beam mounting portion 5C is closed by crushing the end portion in the length direction from the bottom (so that the valley surface 3 is on the mountain surface 2 side). Is a so-called reverse-enclosure type deck plate. This reverse-enclosure type deck plate 1C has the advantage that the height of the mountain surface 2 is lowered, the floor height of the constructed concrete floor can be lowered, and the floor height of the building can be saved. is there.
The deck plate 1D shown in FIG. 10 (d) is formed by crushing the end in the length direction to form a beam placing portion 5D having an end blockage at an intermediate height position between the mountain surface 2 and the valley surface 3. This is a so-called intermediate enclosure type deck plate. This intermediate enclosure type deck plate 1D can ensure the thickness of the concrete on the beam 10 while having the advantage of floor height saving.
Further, as in the deck plate 1 shown in FIG. 11, as the beam placing portion 5, the deck plate length direction of the upper flat area 5 b with respect to the length L 1 of the lower flat area 5 a of the deck plate length direction. A medium-enclosure deck plate with a short L2 is also conceivable.

This type of encro deck plate end clogging (called encro process) is performed by crushing the end of the deck plate in the longitudinal direction with the upper and lower molds. The portion to be crushed is simply crushed with flat upper and lower molds (Patent Document 4 (Japanese Patent Laid-Open No. 6-313341)).
Note that the flatly crushed and closed portions are the portions indicated by 5B, 5C, 5D, and 5b in the deck plates of FIGS. This is referred to as a flat portion, and in some cases, it is indicated by 5B, 5C, 5D, and 5b.
In addition, in the patent literature on the encro deck plate itself, there are also references to encro processing, but there is only a description that “the crest and crest are crushed by pressing from both sides” ( Patent Document 5 (Japanese Patent Publication No. 2-60819), Patent Document 6 (Japanese Patent Laid-Open No. 6-158765), or “The beam placing portion is formed by crushing the longitudinal ends of the deck plate from above and below, respectively” (Patent Document 7 (Patent No. 2759580 (Japanese Patent Laid-Open No. 5-311794)), or just a word such as “crush from top and bottom” or “crush by press”) Patent Document 1 (Japanese Patent Laid-Open No. 56-5997), Patent Document 2 (Japanese Utility Model Publication No. 53-54406), Patent Document 3 (Japanese Patent Laid-Open No. 9-253755) and the like are disclosed to a certain extent, and an enchrome processing apparatus or mold is disclosed. Not.
JP 56-5997 53-54406 JP-A-9-253755 JP-A-6-313341 JP-B-2-60819 JP-A-6-158765 Patent No. 2759580 (Japanese Patent Laid-Open No. 5-311794)

  In the above-described end closing process (enclosure processing) of the deck plate, when the deck plate length direction end is crushed with the upper and lower molds, the crest surface 2 and the slope 4 at the end of the deck plate are folded and closed flat. The portions 5B, 5C, 5D, and 5b are formed, but the material flow at that time is unstable, the mountain surface 2 and the slope 4 are not regularly folded, and extremely irregular and complicated folding occurs. Done. In particular, in the case of a tall deck plate, the instability of the flow of the material is remarkable. For example, the symbol P ′ in FIGS. 9A and 9B described later in the description of the embodiment of the present invention. Like the part shown by (5), the case where the center part of the width direction of the mountain surface 2 overlaps 5 sheets often arises. It should be noted that the folded portion other than the center of the mountain surface hardly overlaps 5 sheets and stays in 3 layers.

When folding with a large number of overlaps (referred to as multiple folding) is performed in this way, the thickness of the multiple folded parts becomes thick, so the upper mold does not move down to the design position and is not at the place other than multiple folding. When crushing is insufficient and the concrete is placed with the deck plate placed on the beam, there is a problem that the gap between the beam increases and the concrete leaks. Is slightly damaged. Further, if the upper die is not lowered sufficiently, there is a problem that the height h with respect to the valley surface 3 of the beam mounting portion 5D becomes smaller than the design value in the case of the intermediate enclosure deck plate 1D of FIG. To do. In addition, since the multiple folded portions are thick, there is a problem that when a plurality of sheets are bundled for shipping, the number of packages in a single bundle is reduced and the conveyance efficiency is lowered.

  The present invention was made in order to eliminate the above-mentioned conventional drawbacks, and when enchrome processing is performed, the flow of the material is stabilized as much as possible, and the mountain surface and the slope are smoothly folded. An object of the present invention is to provide an enclo deck plate processing apparatus that enables folding with a small number of overlapping sheets in the center in the width direction.

The present invention that solves the above-mentioned problem is that the edge in the longitudinal direction of the deck plate having a trapezoidal corrugated cross-sectional shape in which the horizontal crest and trough are continuously sloped is crushed by upper and lower molds. An end closed deck plate processing apparatus for forming a beam placing portion,
In the upper die, when the upper die is pushed down by the press machine at a position corresponding to the center position in the width direction of the peak surface of the top portion of the deck plate to be flattened by the upper die, the upper die is preceded. A folding guide pin is provided which is brought into contact with the mountain surface and pushes down the mountain surface and the upper mold finally crushes the mountain surface flatly and is accommodated in the upper mold.

  According to a second aspect of the present invention, in the end-closed deck plate processing apparatus according to the first aspect, the folding die pin pushes down the crest surface of the deck plate in a state where it receives the reaction force of the elastic member, and the upper mold finally completes the crest surface. The folding guide pin is elastically pushed back into the upper die by contraction of the elastic member at the time of flattening.

In the end closed deck plate processing apparatus of the present invention, when the upper mold crushes the mountain surface, the folding guide pin comes into contact with and lowers the central portion (the central portion in the width direction) of the mountain surface prior to the upper mold. When crushing the mountain surface with the upper mold, the material tends to be gathered near the center of the mountain surface, so the center of the mountain surface tends to be folded irregularly and multiple times. By pushing down the central part of the mountain surface in advance, it has a guiding action to give direction to the pattern that the mountain surface is folded, smoothes the fluidity of the material, limits the folding shape to a certain extent, and creates a stable folding shape. be able to. As a result, a folded shape with a small number of overlapping is obtained as a portion corresponding to the central portion of the mountain surface in the flatly crushed portion.
In particular, in the case of a tall deck plate, multiple folding is likely to occur in the central portion of the mountain surface, so the present invention is particularly effective in the case of a tall deck plate.

  When the folding guide pin pushes down the mountain surface in advance of the upper mold and is stored in the upper mold when the mountain surface is crushed, an elastic member as in claim 2 is used. This is effective in properly exhibiting the action of the folding guide pin.

  Embodiments of the end closed deck plate processing apparatus of the present invention will be described below with reference to FIGS.

The target deck plate in this embodiment is as shown in FIG. 5, and the horizontal crest surface 2 and the trough surface 3 are continuously formed on the slope 4 to form a trapezoidal corrugated cross-sectional shape, and both end edges in the width direction. The adjacent deck plates 1 have engaging portions 6 and 7 for engaging with each other.
The end closed deck plate processing apparatus of this embodiment crushes the end portion in the length direction of the deck plate 1, and places the end block beam at the intermediate height position as shown in FIGS. The intermediate enclose deck plate in which the portion 5 is formed is obtained, and the intermediate end closed shape (intermediate encro shape) of the beam mounting portion 5 mounted on the beam 10 is shown in FIG. The length L2 of the upper flat area 5b in the deck plate length direction is shorter than the length L1 of the lower flat area 5a in the deck plate length direction.

  1 to 3 show an end-closed deck plate processing apparatus (hereinafter abbreviated as “enclosure apparatus” in some cases) 11 according to an embodiment. FIG. Is the state at the time when the tip of the upper mold 17 (described later) comes into contact with the crest surface 2 of the deck plate 1, and FIG. 1 to 3, (a) is a longitudinal sectional view of an intermediate enchrome processing apparatus, (b) is a sectional view taken along line BB in (a), and (c) is a sectional view taken along line AA in (a). is there. In addition, in FIGS. 1-3, the cross-sectional shape of a deck plate and the crushing deformation | transformation state are represented typically.

The enchrome processing apparatus 11 includes a mold 12 that crushes the end of the deck plate 1 in the length direction, and a lift conveyor 13 that can move the deck plate 1 into the mold 12 from the horizontal direction.
The mold 12 is composed of a lower mold 14 having an uneven surface generally matched to the lower surface shape of the intermediate enclosure, and an up and down movable mold 17 having an uneven surface generally matched to the upper surface shape of the intermediate encro shape. ing. 4 (a) is a plan view of the lower mold 14, FIG. 4 (b) is a vertical sectional view of the upper and lower molds shown at the CC cross-section position of FIG. 4 (a), and FIG. It is the longitudinal cross-sectional view of the up-and-down metal mold | die shown by the DD cross-section position.

The lower mold 14 can move up and down with respect to the fixed lower mold 15 while holding a fixed fixed lower mold 15 corresponding to at least a portion that undergoes crushing deformation and a portion of the deck plate that does not undergo crushing deformation. The movable lower mold 16 is divided.
The fixed lower mold 15 includes a protrusion 15a corresponding to at least a portion that undergoes crushing deformation, a recess 15b in which the movable lower mold 16 is fitted so as to be movable up and down, and an inclination corresponding to an inclined portion on the trough side of the encro shape. A spring 20 having a surface 15c and supporting the movable lower mold 16 elastically so as to be movable up and down is disposed at the bottom of the recess 15b. The slope portion of the protruding portion 15a of the fixed lower mold 15 does not necessarily have the lower surface shape of the intermediate enclosure shape (it may be a surface that is recessed from the lower surface shape of the intermediate enchrome shape, or the protruding portion 15a It is also possible to make the middle part in the deck plate width direction of the slope part of the slope part a recess).
The movable lower mold 16 has a cross-sectional shape corresponding to a portion of the deck plate that is not subjected to crushing deformation. That is, the peak portion 16a corresponding to the peak surface 2 of the deck plate 1, the valley portion 16b corresponding to the valley surface 3 (not only the valley portion between the peak portions 16a but also both side portions are also indicated by 16b), and the slope corresponding to the slope 4. A cross-sectional shape having a portion 16c (that is, a cross-sectional shape of the deck plate 1).
The guide when the movable lower mold 16 is moved up and down with respect to the fixed lower mold 15 uses the wall surface of the recess 15b (in this case, a wall surface is also formed in the rear opening) or is fixed. A fitting structure of a vertical guide pin provided on one of the lower mold 15 and the movable lower mold 16 and a pin hole provided on the other can be employed.

  When the upper die 17 is lowered from the state shown in FIG. 1, the elevating conveyor 13 is substantially at the time when the recess 17a of the upper die 17 comes into contact with the upper surface of the deck plate 1 (when the upper die 17 is slightly lowered from the step shown in FIG. 2). ) To the height position of FIG. 3 according to the upper mold 17.

In the present invention, when the upper mold 17 is pushed down by a press to a position corresponding to the center position in the width direction of the peak surface 2 of the top surface of the deck plate to be flatly crushed in the upper mold 17, A folding guide pin 30 is provided to be housed in the upper die when the upper die 17 finally pushes the mountain surface 2 flatly in contact with the mountain surface 2 in advance. .
The upper part of the folding guide pin 30 of this embodiment is housed together with a spring (elastic member) 31 on the back side in a pin housing hole 17 d opened in the upper mold 17. The spring 31 has a spring rigidity that can dent the mountain surface 2 with the folding guide pin 30. Therefore, the folding guide pin 30 pushes down the crest surface 2 of the deck plate 1 while receiving the reaction force of the spring 31 when the upper mold 17 descends, and the upper mold 17 finally pushes the crest surface 2 down. At the time of flattening, the spring 31 is elastically pushed back into the pin accommodating hole 17d by contraction.
In this embodiment, a metal spring is used as the elastic member, but rubber can also be used, and a gas spring or the like can also be used.

An enchrome processing process by the enchrome processing apparatus 11 will be described.
The elevator conveyor 13 on which the deck plate 1 is placed is driven to feed the deck plate 1 between the lower mold 14 and the upper mold 17 in the raised position, and then lowered by a predetermined distance, as shown in FIG. The top end portion of the deck plate 1 (the portion serving as the beam mounting portion 5) is placed on the vicinity of the front end of the fixed lower die 15 and is urged by the spring 20 to the movable lower die 16 in the raised position. Place the portion of the deck plate 1 that will not be crushed and deformed.
Subsequently, when a press machine (not shown) is operated to lower the upper mold 17, enchrome processing is performed.
The deformation of the flatly crushed portion of the front end portion of the deck plate at that time will be described. The folding guide pin 30 comes into contact with the center in the width direction of the top surface 2 of the front end portion of the deck plate before the upper mold 17. When the upper die 17 continues to descend, the folding guide pin 30 pushes down the central portion in the width direction of the peak surface 2 to dent the peak surface 2, but the flat surface portion on the tip side of the upper die 17 is delayed from the folding guide pin 30. 17c comes into contact with the crest surface 2 of the deck plate 1 (the state shown in FIG. 2), and subsequently descends to crush the crest surface 2 flatly. In addition, in the upper mold used for actual processing, usually, the tip portion is not the integral flat surface portion 17c, but as will be described later with reference to FIG. 9, the upper mold main body portion that pushes down the peak surface and the plate pressing portion that presses down the valley surface. Use a mold that is divided into two.
The deformation of the portion that becomes the inclined portion will be described. Although the inclined portion is gradually formed from the time when the flat surface portion 17c on the front end side of the upper mold 17 comes into contact with the mountain surface 2 of the deck plate 1, the upper mold is generally formed. The lift conveyor 13 descends again in synchronism with the lowering of the upper die 17 from the time when the recess 17a contacts the upper surface of the deck plate 1, and the upper die 17 reaches the stroke bottom dead center of the press machine. As shown in FIG. 3, it is crushed by the upper and lower molds 14 and 17 to form a final intermediate enchrome shape. The final intermediate enchrome shape is roughly as shown in FIG. 6, FIG. 7, and FIG.

  In the above-described enchrome processing step, the material that is flatly crushed by the upper mold 17 (flat portion 5b) is likely to be gathered at the central portion of the mountain surface 2, so that the central portion of the mountain surface 2 is irregular and Although it is apt to be folded in multiple, as described above, the folding guide pin 30 pushes down the central portion of the mountain surface 2 in advance of the upper mold 17 so as to give directionality to the pattern in which the mountain surface 2 is folded. Therefore, the fluidity of the material is made smooth, the folding shape is limited to some extent, and a stable folding shape is created. As a result, as a portion corresponding to the central portion of the mountain surface in the flatly crushed portion, a folded shape with a small number of overlaps can be obtained, for example, a portion indicated by P in FIGS.

  The intermediate enchrome shape to be processed in the above embodiment is an intermediate encro shape in which the length L2 of the upper flat region 5b is shorter than the length L1 of the flat region 5a on the lower surface of the beam placing portion 5. The present invention can be similarly applied to the case of intermediate enchrome processing in which the upper and lower surfaces are crushed equally and flatly as in (d), and the obtained effects are the same. However, since the folding guide pin in this case has a long length in the deck plate length direction of the flat portion 5D, it is preferable that the folding guide pin has an elongated rectangular section instead of a circular section according to the length.

In the enclosure processing, multiple folding is likely to occur at the center of the mountain surface particularly in the case of a tall deck plate, so the present invention is particularly effective in the case of a tall deck plate. For example, the folding state of the flat portion when enchrome processing is performed on the tall deck plate 1 ′ having a cross-sectional shape shown in FIG. 8 will be described.
The illustrated deck plate 1 ′ has a groove 2 a for increasing the rigidity of the peak surface 2 at the center of the peak surface 2. The illustrated deck plate 1 ′ has a stepped portion 4 a on the slope 4, and the stepped portion 4 a allows the concrete hardened after placement and the deck plate 1 to be integrated to bear the load. It is a deck plate for.

The enchrome processing apparatus for performing the enclosure processing of the deck plate 1 ′ is basically the same as the enchrome processing apparatus 11 shown in FIGS. 1 to 4, but the mold shape is slightly different due to the difference in cross-sectional shape. It will be a thing.
The deformation state of the flatly crushed portion in the enchrome processing of the deck plate 1 ′ will be described with reference to FIG. In the figure, the left side (a) is the case of the conventional method not using the folding guide pin 30, and the right side (b) is the case of the present invention using the folding guide pin 30, respectively (i) to (h). It transforms in order. Since the actual deformation situation is complicated, FIG. 9 is schematically shown to some extent.
In the illustrated example, the upper mold 27 is divided into an upper mold main body 27 a that presses down the peak surface 2 and plate pressing portions 27 b that press the valley surfaces 3 on both sides of the peak portion 2 in advance, and receives the force of the spring 28. In a state where the valley surface 3 is previously pressed by the plate pressing portion 27b, the upper mold main body 27a slides and descends with respect to the plate pressing portion 27b to crush the mountain surface 2. A lower mold is indicated by 24.
In addition, since the plate pressing portion 27b that presses the valley surface 3 is pressed by the force of the spring 28, the valley surface 3 is not necessarily pressed down completely. In some cases, the lower die 24 may float from the upper surface.
When crushing the mountain surface 2 without using the folding guide pin 30, as shown in (a) to (d) of FIG. After the mountain surface 2 and the steps to the stepped portions 4a on both sides of the mountain surface 2 are expanded, they are greatly dented. Subsequently, when the upper mold body 27a is lowered, as shown in FIGS. 9A to 9H, the portion of the slope 4 is folded and the material is gathered in the central portion of the mountain surface 2. Thus, the crest 2 is crushed flat in a state where the central portion of the mountain surface 2 is irregularly and multiply folded. In the illustrated example, the overlapping portion P ′ at the center of the mountain surface is overlapped by five as shown in FIG. 9 (H) and the enlarged overlapping portion P ′.
On the other hand, when the folding guide pin 30 is crushed, the folding guide pin 30 pushes down the ridge surface 2 before the upper mold body 27a, but the upper mold body 27a contacts the ridge surface 2. After ((c) in FIG. 9 (b)), as shown in (d) in FIG. 9 (b), a large dent deformation at the center of the mountain surface by the depression of the upper mold body 27a precedes. In the processes from) to (d), there is no great difference from the case without the folding guide pin 30 (illustrated as having the same deformation).
However, after the crushing by the upper mold main body 27a further proceeds and the large dent deformation of the mountain surface portion disappears as shown in FIG. As shown in (e) to (h), the folding guide pin 30 effectively performs a guiding action to give direction to the pattern in which the mountain surface is folded, smoothes the fluidity of the material, and stabilizes the folding shape to some extent. A folded shape is created, and a folded shape with a small number of overlapping sheets is obtained at the center of the mountain surface as shown in FIG. In the illustrated example, the overlapping portion P in the center of the mountain surface is three-layered, as shown in (h) of FIG. This is less than the five-layer stack in the case of FIG.

The present invention is not limited to the intermediate enclosure shape as long as the beam mounting portion with the end portion closed is formed at the end portion in the longitudinal direction of the deck plate. The present invention can also be applied to the processing of the reverse encro shape of (c). In this case, the folding guide pin has a long length in the deck plate length direction of the flat portions 5B and 5C. Therefore, the folding guide pin may have an elongated rectangular cross section instead of a circular cross section in accordance with the length.
In the case of a reverse enclo deck plate, the valley surface is crushed toward the mountain surface. Normally, however, the reverse encro process is crushed in a state where the front and back sides are reversed. It can be considered in exactly the same way as the machining process (that is, in a state where reverse enchrome processing is performed, “pushing down the valley surface” as a product means “pushing down the mountain surface” in the claims).

The initial stage in the process sequence by the enchrome processing apparatus (end closed deck plate processing apparatus) of one Example of this invention is shown, (a) is a longitudinal cross-sectional view of an encro-processing apparatus, (b) is in (a). BB sectional drawing, (c) is an AA sectional view in (a). FIG. 1 shows a stage following FIG. 1, where (a) is a longitudinal sectional view of the enchrome processing apparatus, (b) is a sectional view taken along line BB in (a), and (c) is a sectional view taken along line AA in (a). is there. FIG. 1 shows the final stage of enchrome processing following FIG. 1 (however, the folded shape of the closed end portion of the deck plate is schematically shown), (a) is a longitudinal sectional view of the enchrome processing apparatus, and (b) is BB sectional drawing in (a), (c) is AA sectional drawing in (a). The metal mold | die in the said enchrome processing apparatus is shown, (A) is a top view of a lower metal mold | die, (B) is a longitudinal cross-sectional view of the upper and lower metal mold | die shown by CC cross-section position of (A), (C). FIG. 3 is a vertical cross-sectional view of the upper and lower molds shown in the DD cross-sectional position of (a). It is sectional drawing of the deck plate made into the process target in the Example of this invention. It is the figure which looked at the intermediate | middle end closed deck plate which carried out the intermediate enchrome processing of the longitudinal direction edge part of the deck plate of FIG. 5 from the deck plate length direction. It is a typical perspective view of the principal part of the said intermediate | middle end closed deck plate. It is sectional drawing which shows the other example of the deck plate made into the object of this invention. The deformation process when the deck plate of FIG. 8 is engraved will be described by comparing the case (b) of the present invention with the case (a) of the conventional example. ) In this order. This is a general description of Enclo type deck plates. (A) is a deck plate that is not closed, (B) is a normal Encro type deck plate, (C) is a reverse Enclo type deck plate, (D) is an intermediate enclosure type deck plate. It is a figure which shows the other example of an intermediate | middle enclosure type deck plate.

Explanation of symbols

1, 1 'Deck plate 2 Mountain surface 3 Valley surface 4 Slope 5 Beam placing portion 5a Flat surface 5b on the bottom surface Flat region 11 on the top surface End closed deck plate processing device (enclosure processing device)
12 Mold 13 Lifting conveyor 14, 24 Lower mold 15 Fixed lower mold 15a Protrusion 15b Recess 15c Inclined surface 16 Lower movable mold 16a Mountain 16b Valley 16c Slope 17, 27 Upper mold 17a Recess 17b Convex portion 17c Flat surface portion 17d Pin receiving hole 20 Spring 27a, upper mold body 27b Plate pressing portion 28 Spring 30 Folding guide pin 31 Spring (elastic member)

Claims (2)

An end-closed structure in which the horizontal crest and trough are continuously sloped to form a trapezoidal corrugated cross-sectional shape, and the longitudinal ends of the deck plate are crushed with upper and lower molds to form a closed-end beam mounting section. A deck plate processing apparatus,
In the upper die, when the upper die is pushed down by the press machine at a position corresponding to the center position in the width direction of the peak surface of the top portion of the deck plate to be flattened by the upper die, the upper die is preceded. An end-closed deck plate provided with a folding guide pin that is housed in the upper die when the upper die is pressed against the mountain surface and the upper die finally crushes the mountain surface flatly. Processing equipment. While the folding guide pin receives the reaction force of the elastic member, it pushes down the crest surface of the deck plate, and when the upper mold finally crushes the crest surface flatly, the folding guide pin contracts due to the contraction of the elastic member. 2. The end closed deck plate processing apparatus according to claim 1, wherein the end closed deck plate processing apparatus is elastically pushed back into the upper mold.

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