JPS6324974Y2 - - Google Patents

Description

[Detailed description of the invention] The invention includes a first cover and a second cover, and the opening width is divided into two stages depending on the width of the hoop material temporarily stored inside the pit. An embodiment of the adjustable pit cover will be described below with reference to the drawings.

In the figure, the pit cover 1 of the present invention is attached to a pit 4 recessed between a roll forming machine 2 and an uncoiler 3. The hoop H is temporarily stored by rapid forwarding in step 5, and the hoop H is temporarily stored until the tip _H1 of the hoop H of the coil newly supplied to the uncoiler 3 and the rear end _H2 of the preceding hoop H are connected using the joining tool 6. By supplying the hoop H that has been stored for a while to the roll forming machine 2, it is possible to prevent the roll forming machine 2 from stopping.

The pit cover 1 opens and closes the pit 4. The pit cover 1 includes a first cover member 19 and a second cover member 10, and the first cover member 9 is arranged along both sides of the pit 4, for example, as shown in FIG. A slat 13 spans between the string-like bodies 12, 12, which are chains, and the slat 13a located in the center has a small opening into which a narrow hoop material H can be inserted by cutting out the middle part. 14 is formed. The string-like body 12 is wound around chain wheels 17 and 18 that are attached to support shafts 15 and 16 at the front and rear upper ends of the pit 4, and is wrapped around a rotating shaft 20 that is attached to the bottom surface of the pit 4 via an intermediate chain wheel 19. It passes through the chain wheel 21 and revolves endlessly. Also, the slats 13, 13
a is equipped with rollers 23 running on rails 22 arranged on both sides of the pit 4, and the rotating shaft 20
Due to the rotation of the first motor 24 attached to the
By moving beyond this point, almost the entire surface of the pit 4 can be opened. The second cover 10 is attached to the side of the slat 13a facing the small opening 14, and has a slat 29 that moves in a groove 27 formed at the lower end of a link 26 that connects the small opening 14 side of the slat 13a. equip The slats 29 are successively connected using hinges (not shown), and rollers 30 provided at both ends are supported by the grooves 27.
It is held by the first cover member 9. The second cover member 10 is connected to the rotating shaft 20 via a so-called no-back bend chain 31 that can only be bent inward on the support shaft 15 side, and to a drum 34 attached via an electromagnetic clutch 33. be done. Furthermore, chain 3
1 revolves around an intermediate chain wheel 35 that is pivotally supported on the support shaft 15, and the chain 31 is rotated by the rotation of the drum 34 as the outer surface a of the chain 31 is supported by a guide piece (not shown). The second cover member 10 can be moved back and forth through the cover. The electromagnetic clutch 33 is linked to the second motor 36, and when the second motor 36 is rotating, the electromagnetic clutch 33 drives only the drum 34;
4, it operates to connect the rotating shaft 20 and the drum 34.

However, as described above, the pit cover 1 of the present invention moves the first cover member 19 by rotating the first motor 24, and moves the first cover member 19 beyond the chain wheel 17 to position it in the vertical portion thereof, thereby opening the pit 4. At the same time, when the electromagnetic clutch 33 is activated, the second cover 10 is moved together with the first cover 9, and the entire pit 4 is opened, and the wide hoop H is also stored in the pit 4. can. Note that when the second motor 36 is rotated when the first cover 9 is closed, only the drum 34 rotates because the electromagnetic clutch 33 is open, and therefore only the second cover 10 is rotated. By moving, only the small opening 14 can be opened and the narrow hoop material H can be stored therein.

As mentioned above, the pit cover of the present invention can selectively open and close the pit between the roll forming machine and the uncoiler, either in the entire surface or in a small opening, and therefore can open and close the pit depending on the width of the hoop material. That is, by reducing the opening distance as much as possible, accidents such as falling into the pit can be prevented and work can be made safer. In addition, in the pit cover of the present invention, in addition to chains, ropes, belts, etc. can be used as string-like bodies, and in addition to slat-like bodies, flexible wide belts, etc. can also be used by applying appropriate reinforcement. It can be transformed into various forms such as.

[Brief explanation of the drawing]

Fig. 1 is a diagram illustrating a pit that is opened and closed by the pit cover of the present invention, Fig. 2 is a perspective view showing an embodiment of the present invention, and Fig. 3 is a diagram illustrating a pit that is opened and closed by the pit cover of the present invention. Cross-sectional view showing the installation state, No. 4~
FIG. 5 is a perspective view showing the operation. 2... Roll forming machine, 3... Uncoiler, 4...
... pit, 9... first cover, 10... second
12... string-like body, 13... slat, 14... small opening, 24... first motor,
36...Second motor.

Claims (1)

[Scope of utility model registration request] A pit cover for a pit that is recessed between a roll forming machine and an uncoiler and temporarily stores hoop material, and is a pit cover that spans a slat between string-like bodies arranged along both sides of the pit. A first cover member which forms a small opening into which a narrow hoop material can be inserted by cutting out a part of the center thereof, and which opens substantially the entire surface of the pit by running a string-like member; and a second cover member that moves independently to open and close the small opening.