JPS5853514Y2 - Press machine safety fence - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a safety fence for a press machine.

The safety fence used in press machines is suspended by a wire wrapped around the wheels of a pulley or sprocket, or by the string of a check 7, and when the wheels are rotated, it can be moved up and down via the string. It is supposed to be done.

However, with conventional safety fences, the left and right sides of the fence are suspended by one string each, so if this string breaks due to some kind of failure, the drive shaft to which the wheel is fixed and the drive When the coupling that connects the shaft to the power source breaks and the shaft becomes free, there is a serious danger that the safety fence will fall due to its weight.

The present invention was developed in consideration of the above-mentioned issues, and by providing a safety string in addition to the drive string, a safety fence is provided even if the drive string breaks or the drive shaft becomes free. The object of the present invention is to provide a safety fence for a press machine that does not fall by itself and can improve safety.

The configuration will be explained below based on the embodiment shown in the drawings.

1, 1 in the figure. ... are multiple press machines installed in parallel, and 2 is a safety fence.

Both sides of each safety fence 2 are guided by rollers 4 rolling into guides 3 fixed to an applied part of the press machine 1.

A driving string (in this embodiment, a check 7) 5a and one end of an auxiliary string 5b are connected to the upper portions of both sides of the safety fence 2.
The two bodies 5a and 5b are wound around a drive wheel 6as and an auxiliary wheel 6b provided on the upper part of the press machine 1, and the other end is a weight fitted into the guide 3 so as to be slidable in the vertical direction. It is connected to the weight 7.

The drive wheel 6a is wedged on the drive shaft 8, and the auxiliary wheel 6b is rotatably fitted on the drive shaft 8.

The drive shaft 8 is connected to a worm reducer 10 via a coupling 9.
The worm reducer 10 is connected to a drive source 12 via a torque limiter coupling 11.

In the above configuration, when the drive source 12 is driven to rotate the drive shaft 8, the safety fence 2 is moved up and down via the drive wheel 5a and the drive string 5a.

At this time, the auxiliary string 5b is also driven by the driving string 5a.
move parallel to.

When the safety fence 2 is driven, if the drive string 5a breaks or the coupling 9 breaks and the drive shaft 8 becomes free, the safety fence 2 cannot be driven, but the safety fence 2 is used for auxiliary purposes. It balances with the weight 7 via the string 5b and stops at that position.

Furthermore, when an overload acts on the drive source 12, the torque limiter coupling 11 acts to prevent the overload from acting on the drive source 12.

The present invention is as described above, and the safety fence 2 is connected to one end of the drive string 5a wrapped around the drive wheel 6a fixed to the drive shaft 8 provided on the upper part of the press machine 1, and the safety fence 2 is connected to the other end. In a safety fence for a press machine in which a weight I is connected and the safety fence 2 is moved up and down by rotating the drive shaft 8, an auxiliary wheel 6b is rotatably provided on the drive shaft 8, and this auxiliary wheel 6b is rotatably provided on the drive shaft 8. Since the safety fence of the press machine was constructed by wrapping the auxiliary string 5b, which had one end connected to the safety fence 2 and the other end connected to the weight 7, around the cart 6b, the driving string 5a could be cut. Even if the drive shaft 8 becomes free, the safety fence 2 is balanced with the weight 7 by the auxiliary string 5b and does not fall, thereby improving safety.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view;
Figure 2 is a front view, Figure 3 is an enlarged sectional view taken along the line
The figure is a partially cutaway front view, FIG. 5 is a partially cutaway side view, and FIG. 6 is a plan view. 1 is a press machine, 2 is a safety fence, 5a and 5b are driving and auxiliary strings, 6as6b is a driving and auxiliary wheel, I is a weight, and 8 is a drive shaft.

Claims (1)

[Scope of utility model registration request] A safety fence 2 is attached to one end of a driving string 5a wrapped around a driving wheel 6a fixed to a driving shaft 8 provided at the top of the press machine 1.
In the safety fence of a press machine, the safety fence 2 is moved up and down by connecting a weight 7 to the other end and rotating the drive shaft 8. This safety fence for a press machine is characterized in that an auxiliary string 5b, which is freely provided and connected to the safety fence 2 at one end and connected to a weight I at the other end, is wound around the auxiliary wheel 6b.