JPH0215116Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an improvement of a safety fence that covers the front surface of a mold area of a press machine so as to be openable and closable.

(Prior art) A conventional safety fence that covers the front surface of the mold area of a press machine so as to be openable and closable to ensure the safety of workers is, for example, as described in Japanese Utility Model Application Publication No. 123476/1983. There is a press machine in which a safety fence that covers the front of the mold area is raised and lowered along a guide made of a square pipe or the like.

(Problem to be solved by the invention) In the conventional technology in which the safety fence is formed into a single piece, the distance from the bottom surface of the crown of the press machine to the top surface of the bed is the same as the distance from the bottom surface of the slide to the top surface of the bed. If the height is less than twice the height (height of the mold area), the safety fence that covers the front of the mold area cannot be stored inside the storage space formed below the bottom surface of the crown, so the opening height of the safety fence The height of the mold area had to be made smaller than the height of the mold area, which caused problems such as worsening the workability of replacing the mold.

(Means for Solving the Problems) The object of the present invention is to provide a safety fence for a press machine that allows the opening height to be sufficiently increased while requiring a sufficiently small storage space.

For this reason, the present invention divides the safety fence that covers the front of the mold area so that it can be opened and closed into upper and lower parts, and each safety fence is moved up and down between the mold area and the storage space formed above it. In addition to providing a guide to guide the safety fence, by providing an interlocking mechanism that links each safety fence so that the safety fence located relatively above is raised and lowered at half the speed of the safety fence located relatively below. A plurality of safety fences covering the front surface of the mold area are stored in an overlapping state in a storage space smaller than the mold area, so that a sufficient opening height can be formed.

(Embodiment) FIG. 1 is a schematic front view showing an embodiment of a press machine equipped with the present invention, in which a bed 1 and a crown 2 are shown.
are connected via columns 3, 3 on both the left and right sides to form a straight side press. 4 is a slide that is driven up and down along the columns 3, 3;
Reference numeral 5 denotes a bolster mounted on the upper surface of the bed 1, and a mold area 6 is defined between this bolster 5 and the lower surface of the slide 4 located at the top dead center. or,
An upper mold is mounted on the lower surface of the slide 4, and a lower mold is mounted on the upper surface of the bolster 5.

Further, a guide 7 having a pair of front and rear grooves along the vertical direction is installed on the inner surface of the columns 3, 3, and safety fences 8 are installed in the grooves 7a, 7b of the guide 7, respectively.
a and 8b are attached so that they can be raised and lowered. The safety fences 8a and 8b are each formed to have a height approximately half the height of the mold area 6. Furthermore, by covering the front surface of the storage space 9 above the mold area 6 with a fixed fence 10 fixed to the columns 3, 3, the safety fences 8a, 8b can be installed along the grooves 7a, 7b of the guide 7. When raised to the storage space 9, the safety fences 8a and 8b are stored in a superimposed state on the back of the fixed fence 10, respectively.

Reference numerals 11 and 11 indicate guide rollers attached to both ends of the safety fences 8a and 8b, and are made of, for example, bearings.
The safety fences 8a, 8b can be easily moved up and down by the rolling motion of the first part. Moreover, the safety fence 8 is provided between the columns 3, 3 and the guides 7, 7.
Balance weight 12 that balances the weight of a and 8b
a, 12b are housed so as to be able to rise and fall freely, and the balance weights 12a, 12b and the safety fences 8a, 8b are connected via wire ropes 14a, 14b passing through wire guide rollers 13a, 13b, respectively. The safety fences 8a and 8b can be made to stand still at any vertical position.

On the other hand, each safety fence 8a, 8b is connected to an interlocking mechanism 15.
By linking the safety fences 8a through , the safety fence 8a located relatively above is raised and lowered at half the speed of the safety fence 8b located relatively below. This interlocking mechanism 15 is configured as shown in FIG. 4, for example, and has rollers 15a and
15b is pivoted, and the wire 15c, which is stretched and held by the rollers 15a and 15b, is fixed to the back of the upper end of the safety fence 8a located below and the front of the lower end of the fixed fence 10. When the safety fence 8a is moved up and down along the groove 7a of the guide 7, the upper safety fence 8b moves up and down from the lower safety fence 8a.
It is designed to go up and down at 1/2 the speed.

16a is a stopper for regulating the upper and lower end positions of the safety fence 8a located below with respect to the safety fence 8b located above; 16b is a stopper for regulating the lower end position of the safety fence 8b with respect to the fixed fence 10; The safety fence 8a is raised and lowered manually by operating a handle (not shown), or automatically raised and lowered by a lifting mechanism (not shown).

In the safety fence for the press machine configured as described above, during operation of the press machine, the safety fences 8a and 8b descend to their respective lower end positions along the grooves of the guide 7, as shown in the left half of FIG. mold area 6
covers the front of the

When it is necessary to open the front surface of the mold area 6 in order to attach and detach a workpiece (not shown) or replace a mold, for example, the lower safety fence 8a is moved upward. Then, as the lower safety fence 8a rises, the upper safety fence 8b rises at half the speed of the lower safety fence 8a via the interlocking mechanism 15, so both safety fences 8a and 8b are fixed at the same time. fence 10
It is stored in a storage space 9 covered with.

When raising and lowering the safety fences 8a, 8b in this manner, the operating force required to move the safety fences 8a, 8b is proportional to the weight and moving speed of the safety fences 8a, 8b. Therefore, if it is necessary to reduce the operating force, the safety fences 8a, 8b may be moved at a low speed, but in this case, the moving time becomes longer, which is inefficient. On the other hand, if you try to increase the efficiency by increasing the moving speed of the safety fences 8a and 8b,
As the moving speed increases, a greater operating force is required, so it is necessary to increase the size of the elevating and lowering mechanism.

By the way, in order to move the safety fences 8a, 8b that cover the front surface of the mold area 6 to the storage space 9, it is not necessary to move all the safety fences 8a, 8b by the same distance; The distance traveled is becoming smaller. In addition, the actual opening/closing time of the mold area 6 is limited to the safety fence 8 located at the bottom.
The safety fence 8b located above may be raised or lowered within the time taken for the safety fence 8a located at the lowest stage to be raised or lowered.

Therefore, if the safety fence 8a located above is raised and lowered at half the speed of the safety fence 8a located below as in the present invention, the lifting time of the safety fences 8a and 8b will not increase. The lifting force can be reduced. Moreover, since the speed ratio of the safety fence located above and the safety fence located below is 1:2, for example, the rollers 15a and 15b shown in the embodiment
A simple interlocking mechanism 15 using a wire 15c or the like may be provided, and an increase in the cost of the safety fence as a whole can be suppressed.

If the height of the storage space 9 is made larger than half of the mold area 6 by dividing the safety fence into upper and lower parts as in the embodiment, the safety fence 8 is installed inside this storage space 9.
a, 8b can be completely stored.

In addition, when coating the front surface of the mold area 6 again,
Contrary to the above, if the safety fence 8a, which should be located below, is moved downward, the safety fence 8b, which should be located above, will also be lowered.

In the above embodiment, the safety fence is divided into two parts, upper and lower, but if the vertical height of the storage space 9 is less than one-half of the mold area, the safety fence may be divided into three equal parts, for example, into the upper and lower parts. Moreover, the interlocking mechanism 15 that links each safety fence is not limited to the embodiment. Further, in the embodiment, the front surface of the storage space is covered with a fixed fence, but this fixed fence may be omitted.

(Effects of the invention) According to the invention, the safety fence that covers the front of the mold area is divided into upper and lower sections, which are moved up and down through an interlocking mechanism to separate the storage space and the mold area. The lower end of the safety fence protrudes from the storage space into the mold area, reducing the opening height, unlike when a single safety fence is installed in the past. This eliminates the problem and allows the opening area of the mold area to be increased.

In addition, since interlocking means are provided to connect each safety fence so that the safety fence located above is raised and lowered at half the speed of the safety fence located below, the actual time taken to raise and lower the safety fence is increased. The lifting and lowering operation force can be reduced without causing any damage.

[Brief explanation of drawings]

Figure 1 is a schematic front view showing a press machine equipped with an embodiment of the present invention, Figure 2 is a cross-sectional view of Figure 1, Figure 3 is a cross-sectional view of Figure 1, and Figure 4 is an interlocking mechanism. FIG. 1... Bed, 2... Crown, 3... Column, 4... Slide, 5... Bolster, 6... Mold area, 7... Guide, 7a, 7b... Groove, 8
a, 8b...safety fence, 9...storage space, 10...
Fixed fence, 11...Guide roller, 12a, 12b
...Balance weight, 13a, 13b...Wire guide roller, 14a, 14b...Wire rope, 15...Interlocking mechanism, 15a, 15b...Roller, 15c...Wire, 16a, 16b...Stopper.

Claims (1)

[Scope of utility model registration request] A safety fence that covers the front of a mold area that is divided into upper and lower parts and is formed as a whole in a press machine, and a lifting guide for each safety fence between the mold area and a storage space provided above the mold area. and an interlocking mechanism that interconnects each safety fence and raises and lowers the safety fence located relatively above at half the speed of the safety fence located relatively below. Safety fence for press machines.