JPS62107825A - Closing method for end part of deckplate - Google Patents

Abstract

PURPOSE:To obtain a fixed end part closing shape without causing any crack by performing the inner bending predeformation by a claw-shaped projection on the flange part of a deckplate, then by crushing it upto the root face bottom part with a press die. CONSTITUTION:The whole upper die body is descended simultaneously with the descent of a press ram and the projection of a claw 16 gives a predeformation on the flange pat of the deckplate by descending upto a point (b) by coming in touch with the point (a) of the flange part of the deckplate. After descent of the projection of the claw 16 to the point (b) the crushing of the crest part of the deckplate by the punch 15 is started. Simultaneously with this, a cam 6 is descended according to the groove of the cam guide, but the predeformation function is dissipated with the cam 6 escaping in the arrow mark direction by the dislocation allowance. The claw 16 moves to the upper part the elliptic groove 27 provided on the punch 15 simultaneously with being returned to the vertical state by receiving the skew by a pump 15. The claw 16 performs the closing of the deckplate by receiving the load of the upper part holder 14.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a method for closing the end of a deck plate.

(Prior Art) Deck plates are often used as architectural flooring materials or bridge deck bottom materials. For example, Japanese Patent Application Laid-Open No. 58-58349 discloses a method for closing the ends of deck plates during running. There is.

That is, as shown in FIG. 10, the molding machine 120 has desired rolls 122-1.122-2.122-n,
A drive is provided to the roll 122 via a coupling. The running cutting machine 161 is a forming machine 120
It is installed on the line and has a mold. The mold consists of an upper mold and a lower mold, and the upper mold and lower mold are connected to the rail 136-
1 and 156-2 in the advancing direction of the deck plate 1. The deck plate, which has been cut to a regular length and whose ends are closed, is carried out by a roller table 60.

Conventionally, as shown in FIG. 11, for example, the end of a deck plate 30 is given a flat part 31, an inclined part 32, a lip 34 by a closing process, and a ridge line 35.
is formed. H is the deck plate height, b is the lip height, and a is the lip width.

By the way, in the deck plate 30-1, as shown in FIG. 12, a mating part t2 of the lip 34 is overlapped in the width direction of the deck plate to form a floor slab.According to experience, the width of the lip 34 is In a, concrete leakage occurred during construction,
Improvements are desired.

Furthermore, the process of closing the end of the deck plate is usually performed on an on-line, which has poor productivity and requires mass production by in-line.

(Problem to be solved by the invention) When closing the end of the deck plate, an S-shape is formed during the closing process without forming a lip at the end, and the S-shape is finally crushed and deformed. This can prevent concrete from leaking at the joints in the width direction of the deck plate, but requires a method for closing the ends that prevents the deck plate from cracking and provides excellent shape.

The present invention provides a method for closing the end of a deck plate that reliably prevents concrete leakage during construction and forms the end with high productivity.

(Means for solving problems) The present invention will be explained below with reference to the drawings.

FIG. 1 is a flowchart of the step of closing the end of the deck plate in the present invention. The material 1 is molded by a conventional method in step a, and in step b, it is positioned in a mold (not shown), and the deck plate is restrained by a temporary presser 11.

In step C, the flange is pre-deformed to obtain bending directionality. Next, step C is completed by crushing the peaks of the deck plate with a punch, crushing the rib peaks, bringing the bent portion S into a close contact state, and, if necessary, processing one end of the notch.

Therefore, the deck plate according to the present invention has a completely closed end, as shown in FIG. 1f.

Figure 2 shows the entire front view of the present invention when the end closure process is completed, the right side of the figure is a front view of a partial cross section, and Figure 3 (aJ
i'f, the side view of Figure 2 shows the start of machining and the time of machining completion, Figure 3 (bl is a partial view), Figure 4 (at
, (bl is an exploded view of the main parts of the present invention, FIG. 5 is a state at the start of closing processing, (aJ is a front view, (b) is a side view, and (c) is a partial side view. FIG. 6 is a front view, (b) is a side view, and (c) is a partial side view. , (a) is a front view, [b] is a side view, and U is a partial side view when the closing process is completed.

In the present invention, as shown in FIG. 2, a lower die 22 is provided with a lower holder 21, and a guide bonnet 4 is erected.

The upper die 6 is entirely mounted on the rail 2, is engaged with a drive system (not shown), moves back and forth, and is given a known press function so that it can be moved up and down. The lower holder 21 also has a product guide 12 that fits into the crest of the deck plate 10 as shown in FIG.
A product guide 13 that fits into the valley is disposed.

Furthermore, as shown in FIG. 3, in the upper die 3, a spring 8 is provided in the guide bin 7-2, and a temporary presser 10 is installed horizontally with a buffer material 9 interposed therebetween, and is fitted into the valley of the deck plate 1. It has a temporary presser foot 11 which cooperates with the lower die to facilitate the end closing action of the deck plate 1. Further, a lower blade 23 is provided on the lower holder 21, and the deck plate 1 is cut into a regular length by the upper blade 20 provided on the upper holder 14.

The upper holder 14 in the present invention includes an upper blade 20 and a punch 15. As shown in FIG. 5, the punch 15 is provided with an elliptical groove 27 having a desired length tl.

The guide pin 7-1 is covered with a spring 8 and is tapped to the upper die 6, while the other end is fixed to the pack plate 18.

The pack plate 18 according to the present invention is provided with an arbitrary slope Q on the edge side end surface, and the pin 1 is provided in the oval groove 27 of the punch 15.
An L-shaped pawl 16 pivotally supported at 9 is brought into contact with the slope Q.

A pair of cam guides 5 are provided vertically on the lower die 22, facing each other, and a groove 28 is formed in the cam guide 5, as shown in FIG. 5, and a cam 6 is horizontally provided therein. As shown in FIG. 6, the groove 28 guarantees the movement amount t2 of the cam B, and can provide a deviation L1 at any position of the groove. Further, the amount of movement t2 of the cam O is designed to be equal to the length tl of the oval groove 27 of the punch.

FIG. 4 (al is an exploded explanatory view in which the claw 16 is supported in a vertical state during closing machining, and (bl is an exploded explanatory view at the start of machining).

The structure of the present invention is as described above, but next, the closing process of the end of the deck plate will be explained.

The entire upper die 5 descends at the same time as the press ram descends, and the fifth
As shown in the figure, the protrusion of the claw 16 comes into contact with point a on the flange portion of the deck plate 1 and descends to the point a, thereby imparting pre-deformation to the flange portion of the deck plate 1. The reaction force caused by the pre-deformation of the deck plate 1 is stopped by the cam 6 via the pack plate 18 against which the pawl 16 comes into contact.

After the protrusions of the claws 16 have descended completely, the punch 15 begins crushing the peaks of the deck plate 1.

At the same time, the cam 6 descends according to the groove 28 of the cam guide 5, but due to the deviation L1, the cam 6 moves downward as shown in FIG.
The pre-deformation function disappears in the direction of the arrow shown in .

On the other hand, using the pin 19 as a fulcrum, the claw 16 is pushed by the punch 15 and returned to the vertical state, and at the same time
5. The oval groove 27 provided in 5 is moved completely upward. The movement at this time is subject to the compressive stress of the spring 8.

Therefore, the closing process in the present invention is performed using the punch 15 and the claw 16.
, punch 17 will cooperate.

The punch 15 is held by the upper holder 14, and the claw 16 is
It moves upward along the oval groove 27 of the punch 15 and returns vertically. As mentioned above, tl of the oval groove 27 of the punch 15 is equal to the movement amount t2 of the cam of the groove 28 of the cam guide 5.
It is assumed to be the same as that and to be aligned at the end of the stroke of the press ram. Therefore, the claws 16 receive the load of the upper holder 14 and close the deck plate 1.

FIG. 7 shows the deformation of the deck plate 1 over time during the closing process. At the stage where the end portion of the deck plate 1 has been closed, the deck plate 1 is cut to a fixed length by the upper blade 20 and the lower blade 23.

In the present invention, the product deck plate is joined in the width direction as shown in FIG. and obtain the shape of part B. Therefore, it is extremely practical to process part A so that the notch γ is rounded as shown in FIG. 9, since the joint with the adjacent deck plate 3 can be formed tightly.

Although the present invention is carried out within the deck plate forming line, the closing process may of course be carried out in a separate line, or the cutting of the deck plate to a fixed length and the closing process may be carried out separately.

(Effects of the Invention) In the present invention, the end of the deck plate is closed by pre-deforming the flange of the deck plate by inward bending using a claw-like protrusion, and then being pressed from above to the bottom of the valley surface with a pressing die. A closed shape is obtained, and the deck plate does not crack due to the closing process, and productivity can be improved by incorporating it into a deck plate production/processing line.

[Brief explanation of drawings]

FIG. 1 is a detailed explanatory diagram of the present invention, FIG. 2 is a front view of the present invention, FIG. 6(a) is a side view of FIG. 2, and FIG. 5(b) is a partial explanatory diagram of the present invention. Figure 4 (al (b) is an exploded explanatory diagram of the main parts of the present invention, Figure 5 (al (b) Ic) is an explanatory diagram of the action at the start of processing of the present invention, and Figure 6 (a) (bl
(cl is an explanatory diagram of the action of the present invention upon completion of machining, Figure 7 is a line diagram of modification of the present invention, Figure 8 (al (bl tc)
is an explanatory diagram of a product according to the present invention, FIG. 9 (b) is a partial perspective view of the present invention, and FIG. 10 is a process explanatory diagram of a conventional example.
FIG. 11 is a perspective view of the conventional example, and FIG. 12 is a front explanatory view of the conventional example. 1: Depth plate 2: Rail 6: Upper die 4 Guide post 5: Cam guide 6: Cam 7-1 Guide pin 7-2: Temporary press guide 8 Spring Pin 9: Urethane 10: Temporary press A 11: Temporary press B 12 :Product guide A13:Product guide B 14:Upper holder 15:Punch A 16
: Claw 17: Punch B 18: Pack plate 19: Bin 20: Upper blade 21: Lower holder 22 = Lower die 25: Lower blade 24: Claw holder 25: Cam holder 26: End notch upper blade 27: Oval groove 28 :
Mizo Agent Patent Attorney Tatsuo Chanoki Figure 1 Figure 9 Figure 10 Figure 11 Figure 12

Claims (4)

[Claims] (1) A steel strip is passed through multiple roll stands and continuously cold rolled to form a deck plate, and the intermediate part of the flange of the deck plate at the longitudinal end of the deck plate is pre-deformed by inward bending with claw-like protrusions. A method for closing the end of a deck plate, which is characterized in that the bottom of the valley surface is then closed by pressing with a pressing die from above. (2) Continuous cold roll forming line for deck plates,
2. A method for closing an end of a deck plate according to claim 1, wherein a desired cutting position of the deck plate is closed and the deck plate is cut at the same time. (3) A method for closing the ends of a deck plate according to claim 1, wherein a continuous cold roll-formed deck plate is cut at the same time as a desired cutting position of the deck plate is closed on a separate line. (4) The method for closing the ends of a deck plate according to claim 1, wherein the ends of the deck plate are closed after cutting the deck plate formed by continuous cold roll into regular lengths.