JPS5837857Y2 - Chain tensioning device for sheet-fed printing machine paper discharge section - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a chain tensioning device for a paper discharge section of a sheet-fed printing machine.

A conventional device will be explained with reference to FIGS. 1 to 4.

Shafts 2.3 are attached to the front and rear of the frame 1 arranged on the left and right sides, and sprocket wheels 4.5 are rotatably attached to each of the shafts 2.3.

A chain 76 is looped around the sprocket wheel 4.5 and is driven from the machine.

The shaft 3 is inserted into the frame 1 and detachably attached to the frame 1 via a washer 7 with a cap nut 8.

The shaft part of the shaft 3 inserted into the frame has its upper and lower surfaces chamfered with two planes parallel to the axis, a thread is cut perpendicular to this, and a tension bolt 9 is screwed into it, and the side of the frame 1 Similar planes are provided on these planes, on which the frame 1 and the shaft 3 come into contact, and by twisting the tension bolt 9, the shaft 3 slides back and forth on said plane.

There are two bearings 10 on the overbang part of the shaft 3.
There is a bearing 11 held by, to which the sprocket wheel 5 is bolted.

The chain guide 12°13.14 is placed between the sprocket wheel 4 and the sprocket wheel 50, above and below the chain 7, and is attached to the frame IK with bolts 15.

Chain 6 is connected to these chain guides 12°13.14
will be moved as a guide.

Bolt 1 listed in Cheno Guide 12.13.14
The hole for No. 5 is a long hole extending in the horizontal direction.

The above is an outline of the structure for the drive side, but the operation side is also provided with an opposite hand at a corresponding position, and when adjusting the shaft position, the left and right sides are adjusted at the same time.

The chain 76 driven from the machine stretches and sag during use.

Therefore, in such a case, by loosening the cap nut 8, further loosening the bolt 15, and twisting the tension bolt 9, the shaft 3 of the sprocket wheel 5 can be slid backward, and the chain loop can be lengthened to tension the chain. can be done, but each time I use Cheno 6 and Cheno Guide 12.13°1
Since it is necessary to adjust the positional relationship between the printers 4 and 4, the adjustment operation takes time, which reduces the efficiency of printing work.

This invention rotatably supports the sprocket wheel that hangs the chain 7 at the rear end of the machine in the paper discharge section of a sheet-fed printing press that discharges paper using a chain gripper, and also allows it to slide horizontally on the frame in the front and back direction. a shaft attached to the shaft, a drive mechanism for sliding the shaft in the front-back direction, a chain guide support fixed to the shaft and whose movement is regulated in the horizontal front-rear direction by the frame, and a chain guide support fixed to the chain guide support. It is characterized by a cheno guide that guides the path of the chino, and its purpose is to eliminate the drawbacks of the conventional chino, eliminate the need for positional adjustment work, and shorten the machine stop time. It is an object of the present invention to provide a chain tensioning device for a paper discharge section of a leaf printing machine.

The present invention is constructed as described above, and when the chino is stretched and slack during use, when the drive mechanism is activated to slide the shaft rearward, the sprocket wheel moves rearward and the chino becomes slack. The pass becomes longer and Cheno is stretched.

At the same time, the chain guide support fixed to the shaft also slides rearward, thereby moving the chain guide a similar distance rearward.

As described above, according to the present invention, when the sprocket wheel is moved, the cheno guide also moves by the same distance, so that the positional relationship between the cheno and the cheno guide can be easily adjusted in a short time.

Moreover, the stop time of the printing operation is thereby shortened, and the efficiency of the operation is improved.

The present invention will now be described in detail with reference to the most preferred embodiment shown in FIGS. 5 and 6.

The shaft 23 is inserted into the frame 21 and is attached to the frame 21 with a washer 27 and a cap nut 28.

The shaft portion of the shaft 23 inserted into the frame 21 has an upper and lower surface chamfered with two planes parallel to the axis, a thread cut perpendicular to this, and a tension bolt 29 screwed into the shaft portion.

A similar plane is also provided on the side of the frame 21, and the frame 21 and the shaft 23 are in contact with each other on these planes, and by twisting the tension bolt 29, the shaft 23 can be slid back and forth on the plane.

A chain guide 1 support 22 is fixed to the overhang of the shaft 23, and a bearing 31 held by two bearings 30 is inserted, and a sprocket wheel 25 is bolted to this bearing 31 to drive the chain 26. It can be rotated by

The chain guide support 22 is provided with a groove 36 for guiding that extends in the front-rear direction, and the tip of a shaft 37 bolted to the frame 21 is inserted into this groove 36. It can slide horizontally in the front and back directions as a guide.

The chaino guides 32, 33, and 34 are arranged between the front and rear sprocket wheels and above and below the chaino 26, and are attached to the chain guide support 22 by bolts 35, respectively.

Furthermore, the ceno guide 34 is attached to the frame 2 by means of bolts 38.
It is also attached to 1.

The hole through which the bolt 38 on the cheno guide 34 passes is an elongated hole extending horizontally in the front-rear direction.

The above is an outline of the structure for the drive side, but the operation side is also provided with an opposite hand at a corresponding position, and when adjusting the shaft position, the left and right sides are adjusted at the same time.

The present embodiment is constructed as described above, and if the cenograph 26 is stretched and becomes slack, the cap nut 28 is loosened, the bolt 38 is further loosened, and the tension bolt 29 is twisted.
The shaft 23 slides and moves horizontally in the rearward direction of the frame 21.

Chain guide support 2 attached to shaft 23 at the same time
2 moves horizontally in the rear direction by being guided by a shaft 37 attached to the frame 21 through a groove 36 provided therein.

Therefore, the chain guides 32, 33, 34 attached to the chain guide support 22 move horizontally in the rearward direction.

The elongated hole for the bolt 38 raised in the cheno guide 34 is a long hole raised horizontally in the front-rear direction, so there is no problem when moving the cheno guide, and after the movement is completed, the bolt 38
and tighten the cap nut 28.

In this way, according to this embodiment, the chain guide support is attached to the shaft to which the sprocket wheel is attached, and the chain guide support is attached to the chain guide support, and each of them slides only horizontally in the front and back direction with respect to the frame. Since the shaft is regulated to move, when the shaft is slid, the respective members slide together,
It can make Cheno nervous.

Further, the position adjustment of the chain and the chain guide after tensioning the chain is easy and can be done in a short time.

Therefore, the stop time of printing work can be shortened and work efficiency can be improved.

[Brief explanation of drawings]

Figures 1 to 4 show the paper discharge section of a conventional sheet-fed printing press, where Figure 1 is a plan view, Figure 2 is a view taken along the line X-X in Figure 1, and Figure 3 is a top view.
The figure is an enlarged explanatory view of the Y section in Figure 2, and Figure 4 is the z-Z diagram in Figure 3.
5 to 7 show a chain tensioning device according to an embodiment of the present invention, FIG. 5 is an explanatory view of the overall structure showing the same parts as in FIG. 3, and FIG. -W sectional view, and FIG. 7 is a TT sectional view of FIG. 21...Shaft, 22...Chain guide support, 23...Shaft, 25...
・Sprocket wheel, 26...Cheno, 2
9...Tensile pole), 32°33.34...
...Cheno guide.

Claims (1)

[Scope of utility model registration request] In the paper discharge section of a sheet-fed printing press that discharges paper using a chain gripper, it rotatably supports the sprocket wheel that hangs the chain 7 at the rear end of the machine, and is attached to the frame so that it can slide horizontally in the front and back direction. a shaft, a drive mechanism for sliding the shaft in the front-rear direction, a chain guide support fixed to the shaft and whose movement is regulated in the horizontal front-rear direction by the frame, and a path for the chain guide 7 fixed to the chain guide support. A chain tensioning device for a paper discharge section of a sheet-fed printing machine, characterized by comprising a chain guide for regulating.