JP3246644B2 - Shearing machine upper blade replacement device and replacement method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upper blade replacement device and a replacement method for a shearing machine.

[0002]

2. Description of the Related Art Conventionally, when replacing the upper blade of a shearing machine, a plurality of workers remove and mount the upper blade by simultaneously inserting fingers between the upper blade and the lower blade and supporting the heavy upper blade up and down. . For this reason, there is a drawback that a very dangerous and unreasonable posture is required and workability is poor.

[0003]

SUMMARY OF THE INVENTION The present invention provides a safe and operable upper blade replacement device and a replacement method for a shearing machine which allows one worker to easily replace the upper blade.

[0004]

SUMMARY OF THE INVENTION The present invention relates to an upper blade exchanging device for a shearing machine, which includes a stay removably disposed so as to extend from a bed position in a direction in which a cutting material is delivered. A support having a vertically extending main body portion detachably mounted, an upper blade receiver mounted on the main body portion so as to be able to move up and down to support the upper blade, and an operating device for moving the upper blade receiver up and down. The present invention provides a shearing machine upper blade replacement device including the device. The present invention is also such a device, wherein the operating device for raising and lowering the upper blade raises and lowers the upper blade receiver via a bevel gear from a shaft operated and rotated from a delivery side of the cutting material provided on the main body. And a shearing machine upper blade changing device. .

[0005] The present invention also relates to a method of replacing an upper blade of a shearing machine, comprising the steps of: arranging a stay extending from a bed position in a cutting material sending direction; Mounting the support device having the upper blade support on the ram with the upper blade support being lower than the upper blade, raising the upper device to a state in which the upper blade support supports the upper blade, loosening the mounting bolt of the upper blade, and Supporting the blade support, lowering the upper blade support to support the upper blade on the stay, and removing the support device. Removing the upper blade, supporting the next upper blade on the stay, mounting the supporting device on the ram, raising the upper blade receiver of the supporting device to the mounting position of the upper blade, and mounting bolts. A method for replacing an upper blade of a shearing machine, comprising the steps of: attaching an upper blade to a ram; and removing the support device and the stay.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of the blade portion of the shearing machine as viewed from the cutting material sending side. In this figure, 10 is a bed of a shearing machine, and 12 is a lower blade. 13 is a ram, and 15 is an upper blade inclined as shown. Reference numeral 17 denotes a mounting bolt for the upper blade, which passes through a hole 18 formed in the ram 13 and is screwed into a screw hole formed in the upper blade. A push bolt 19 is screwed into a screw hole passing through the ram 13 so as to press the upper blade 15.
Reference numeral 20 denotes a lock nut screwed into the push bolt. 2
Reference numeral 2 denotes two stays which are detachably attached to the bed 10 by bolts or the like (not shown), and whose upper surface is disposed near the lower end of the lower blade 12 so as to extend substantially horizontally in the cutting material sending direction. It is. As the stay, the tip of a horizontal metal rod may be screwed to the bed 10 and attached. The stays 22 may be arranged so as to extend adjacent to each other without being fixed to the bed 10, and only one stay having a certain width may be arranged near the center.

Reference numeral 23 denotes two support devices having different lengths, which are configured as described below. That is, referring also to FIG. 2, reference numeral 25 denotes a main body extending in the up-down direction. A notch 26 is formed by cutting out a part near the upper end. It is designed to be fixed with a nut 20. 27 is the main part 2
A female screw member 28 is provided with an upper blade receiver which can be moved up and down along 5. Reference numeral 29 denotes a lifting device, which is a rotating means 3 such as a wrench.
The screw 32 is screwed from the shaft 32 that rotates from the front through the pair of bevel gears 33 to the female screw member 28 via a pair of bevel gears 33, and the screw 35 that extends in the vertical direction is rotated to move the upper blade receiver 27 up and down.

A method for replacing the upper blade 15 in the above-described configuration will be described. First mounting bolt 1
7. Remove one by one near both ends. The two remaining mounting bolts 17 are also slightly loosened. Next, each lock nut 20 is loosened and all the push bolts 19 are also loosened, but one push bolt 19 is largely loosened together with the lock nut 20 near both sides where the support device 23 is mounted. The notch 26 of the main body 25 of each support device 23 is engaged with the corresponding push bolt 19, and the lock nut 20 is tightened and fixed.
In FIG. 1, the upper blade receivers 27 on the left and right sides of the support device 23 are raised so that they come into contact with the lower surface of the upper blade 15, and one mounting bolt 17 remaining on the left side is removed. In this state, the upper blade receiver 27 of the left support device 23 is lowered until the upper blade 15 becomes horizontal. One or two mounting bolts 17 that have been removed are screwed into the screw holes of the upper blade 15. Next, one lower mounting bolt 17 is removed. The upper blade receivers 27 on both sides of the support device 23 are slowly lowered while being kept substantially horizontal so as to be supported on the stay 22 so as not to fall down using the mounting bolt 17 screwed in earlier.
Both support devices 23 are removed. Remove the mounting bolt 17 screwed in from the upper blade 15 on the stay 22, and remove the upper blade 1
5 is tilted sideways, pulled forward and taken out and arranged at a predetermined position.

The maintained upper blade 15 is mounted as follows. The upper blade 15 is placed on the stay 22 after confirming the position of the blade surface. The two support devices 23 removed earlier are installed in the same place. Mounting bolt 1 similar to that removed from upper blade 15
7 is screwed in. Two upper blade supports 27 of the support device 23
The upper blade 15 is raised to the lower side, that is, the mounting position of the support device 23 on the right side in FIG. 1 so that the upper blade 15 is not tilted by the mounting bolt 17 and the mounting bolt 17 is inserted at this position. Temporarily tighten. Next, the upper blade receiver 27 is raised by the support device 23 on the upper side, that is, the left side in FIG.
3 is brought into contact with the upper surface of the mounting portion and temporarily tightened with the mounting bolt 17. Raise the upper blade receiver of the lower support device of the upper blade 15 until it can no longer be raised, and raise both mounting bolts 1.
7 is fixed. Next, the upper blade receiver 27 of each support device 23 is lowered, and this support device is removed. Tightening all the remaining mounting bolts 17 and tightening the push bolts 19 complete the replacement of the upper blade 15.

When replacing the lower blade 12 with the upper blade 15, the stay 22 is first attached, and the lower blade 12 is placed on the stay and taken out. Next, the upper blade 15 is replaced as described above, but the stay 22 is left. Thereafter, the prepared lower blade 12 is placed on the stay 22 and attached to the bed 10,
If the stay 22 is removed, the replacement is completed.

In the present invention, various changes can be made. Many shearing machines are not provided with the above-mentioned push bolt 19, and in such a case, the main body 25 of the support device 23 is inserted into the hole 18 of the ram 13 from which the mounting bolt 17 is removed as shown in FIGS. The pin 37 attached to the upper end may be inserted and fixed with the set screw 38 before use. Alternatively, a screw hole may be formed in the ram 13, and the ram 13 may be mounted in the same manner as in the embodiment shown in FIGS. In the present invention, for example, only one support device 23 disposed near the center may be used. The lifting device 29 of the support device 23 may be changed to a device using a fluid pressure cylinder.

[0012]

As described above, according to the present invention, the upper blade 1
There is no need to raise / lower the ram 13 to replace the 5 and the power can be turned off and work can be performed, and there is no need to support the upper blade 15 by inserting fingers between the upper blade 15 and the lower blade 13. In addition, since there is no need for human power to move the upper blade 15 up and down, and since the mounting and dismounting of the supporting device 23 is simple, it can be replaced in a short time and with little labor. In addition, there is an advantage that one worker can perform the work only from the front.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the present invention as viewed from a cutting material delivery side, which is partially cut away.

FIG. 2 is a side view mainly showing the supporting device.

FIG. 3 is a side view showing, as a partial cross section, a main part of an embodiment in which a part thereof is modified.

FIG. 4 is a front view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Bed 12 Lower blade 13 Ram 15 Upper blade 19 Mounting bolt 22 Stay 23 Supporting device 25 Main part 27 Upper blade receiver 29 Elevating device 33 Bevel gear

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Showa 55-179724 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B23D 33/00

Claims (3)

(57) [Claims] 1. An upper blade changing device for a shearing machine, comprising a stay removably disposed so as to extend from a position of a bed in a direction in which a cutting material is delivered, and further detachably attached to a ram. It includes a supporting device having a main body extending in the vertical direction, an upper blade receiver mounted to the main body so as to be able to move up and down to support the upper blade, and an operating device for moving the upper blade receiver up and down. Shearing machine upper blade replacement device. 2. The apparatus according to claim 1, wherein the operating device for raising and lowering the upper blade receives the upper blade receiver via a bevel gear from a shaft provided on the main body and rotated by operating from a cutting material delivery side. An upper blade changing device for a shearing machine, which is adapted to be raised and lowered. 3. A method for replacing an upper blade of a shearing machine, comprising: arranging a stay extending from a bed position in a cutting material sending direction; Attach the device to the ram with the upper blade holder below the upper blade, raise the device to a state where the upper blade holder supports the upper blade, and loosen the mounting bolts of the upper blade to secure the upper blade holder to the upper blade holder. Supporting, lowering the upper blade receiver to support the upper blade on the stay, and removing the supporting device. Removing the upper blade, supporting the next upper blade on the stay, mounting the supporting device on the ram, raising the upper blade receiver of the supporting device to the mounting position of the upper blade, and mounting bolts. A method for replacing an upper blade of a shearing machine, comprising the steps of: attaching an upper blade to a ram; and removing the support device and stay.