JPH0111375Y2 - - Google Patents

Description

[Detailed description of the invention] (Technical field) The gap adjustment device for a shearing machine according to this invention has a gap adjustment device that adjusts the gap when the upper and lower blades of a shearing machine are engaged to cut various sheet-like or coil-like metal plates. It is used to adjust the size of the gap formed between the end faces of both teeth.

(Background of the invention) To cut various metal plates, two blades are brought close to each other using the power of a motor, hydraulic cylinder, etc., or through a transmission mechanism such as a toggle mechanism, and a force in the shearing direction is applied to the metal plate. Shears for cutting this metal plate are widely used. Such a shearing machine has an upper blade 1 and a lower blade 2 as shown in FIG. 1, and when cutting a metal plate, the upper and lower blades 1 and 2 are
Insert the metal plate 3 between the two blades 1 and 2 with the two blades separated from each other, raise the lower blade 2 (or lower the upper blade) relative to the fixed upper blade 1 (the lower blade may be fixed), A metal plate 3 is cut between the double blades 1 and 2.

By the way, in the shearing machine that operates as described above, the end surface 1a of the upper blade 1 and the end surface 2a of the lower blade 2 do not come into sliding contact with each other when the two blades 1 and 2 are engaged, but the two surfaces 1a and 2a A gap of width W is provided between them. The width W of this gap is not always constant,
It must be adjusted according to conditions such as the material and thickness of the metal plate 3 to be cut. For this reason, in the past, the fixing bolts 6, 6 of the holder 5 for attaching the fixed upper blade 1 to the frame 4 of the shearing machine were warmed, the holder 5 was moved in the left-right direction in FIG. The width W of the gap formed between the end surfaces 1a and 2a of the double blades 1 and 2 was adjusted by tightening the bolt 6. However, in this way, the mounting bolt 6,
The work of adjusting the width W of the gap by warming and tightening 6 is troublesome and time-consuming, and is a work that workers dislike because it stains their hands and clothes with oil. Also, with the mounting bolts 6, 6 warmed, attach the holder 5 of the upper blade 1.
Even if you push and pull, it is difficult to finely adjust the gap width W, and in some cases, the end surface 1a of the upper blade
The end face 2a of the lower blade 2 may become non-parallel, making it difficult to perform a good cutting operation.

(Purpose of the invention) The present invention solves the above-mentioned inconveniences, makes it possible to easily and quickly adjust the width W of the gap between the upper and lower blades, and allows delicate adjustments to be made to break the parallelism between the two blades. It is an object of the present invention to provide a gap adjustment device for a shearing machine without

(Structure of the invention) In the gap adjustment device for a shearing machine of the invention, a pair of bearings are fixed at a distance from each other to a holder with an adjustment blade fixed to the front side, and the pair of bearings are , an eccentric shaft portion formed at the intermediate portion of each rotating shaft is rotatably inserted.

A threaded piece having a female thread is provided at the distal end of the arm whose base end is fixed to each rotating shaft so that the arm can freely rotate and move slightly in the length direction of the arm.

In this way, the screw piece attached to each arm is threaded with the middle part of a single screw rod that is supported on the frame so that it can only rotate in the twisting direction parallel to the blade. A handle for rotating the screw rod is provided at the end of the rod.

(Operation of the invention) When adjusting the gap between the upper and lower blades using the gap adjustment device of the present invention constructed as described above, when the screw rod is rotated using the handle at the end of the screw rod, the arm end The screw piece attached to the section moves along this screw rod. By this movement of the screw piece, the arm with the screw piece attached to the end swings about the rotation shaft, thereby rotating the rotation shaft by that amount. As the rotating shaft rotates, the bearing in which the eccentric shaft part in the middle of the rotating shaft is inserted moves slightly in parallel, and as a result, the blade on the adjustment side, which is fixed to the front of the holder with this bearing provided at both ends, moves in parallel. Then, the gap between the upper and lower blades is adjusted.

(Embodiments of the Invention) Next, the present invention will be explained in more detail by explaining the illustrated embodiments.

2 to 4 show an embodiment of the present invention, FIG. 2 is a perspective view with the adjustment device partially omitted, and FIG.
The figure is a plan view, and FIG. 4 is a sectional view taken along the line AA in FIG. 3.

Bearings 9, 9 each having a vertical bearing hole 8 are fixed to the rear surface of both ends of the holder 7 to which the blade 2 on the adjustment side (lower side in the illustrated example) is fixed. In the bearing hole 8 of both bearings 9, 9, there is an eccentric shaft portion 13 formed in the middle part of a rotating shaft 12 which is supported at two upper and lower locations on the frame 11 of the shearing machine via a bearing 10.
is inserted so that it can freely rotate and move up and down within this bearing hole 8. Reference numeral 14 denotes a bearing provided between the outer circumference of the eccentric shaft portion 13 and the inner circumference of the bearing hole 8. The central axis a of the eccentric shaft portion 13 is
It is slightly shifted from the center axis b of the rotation shaft 12. Therefore, when the rotating shaft 12 supported by bearings 10, 10 on the upper and lower sides rotates about the axis b,
This eccentric shaft portion 13 is swung in the left-right direction in FIG. 4, and the bearing 9 into which this eccentric shaft portion 13 is inserted is translated in the left-right direction in FIG.

On the other hand, the base of an arm 15 is fixed to the upper end of each rotating shaft 12, 12, respectively. A fork 16 is formed at the tip of each arm 15, 15, respectively. A long hole 22 extending in the length direction of the arm 15 is formed on both upper and lower surfaces of the forked portion 16 . A pin 18 protruding from the upper and lower surfaces of a screw piece 17 attached to the inside of the forked portion 16 is loosely engaged with the elongated hole 22 . A screw rod 20, which is rotatably supported by the frame of the shearing machine, is screwed into the screw hole 19 provided in each of the screw pieces 17, 17. A handle 21 is fixed to one end of this screw rod 20 so that the screw rod 20 can be rotated by hand. The operation of the shear gap adjusting device of the present invention constructed as described above is as follows.

First, when cutting a metal plate, the holder 7 to which the lower blade 2 is fixed is raised together with the bearing 9 by a drive mechanism (not shown) such as a toggle mechanism or a hydraulic cylinder, and the holder 7 is raised together with the bearing 9 between the upper blade 1 and the lower blade 2. Cut the metal plate. At this time, the bearing 9 is attached to the eccentric shaft portion 13 of the rotating shaft 12.
move vertically relative to the

When adjusting the width W (FIG. 1) of the gap between the end surface 1a of the upper blade 1 and the end surface 2a of the lower blade 2, the threaded rod 20 is rotated by the handle 21. As the screw rod 20 rotates, the screw pieces 17, 17 screwed into the screw rod 20 move to the left and right in FIG. 3, and the rotation shaft 12 rotates slightly via the arm 15. When the rotation shaft 12 rotates in this way, this rotation shaft 1
The bearings 9, 9 into which the eccentric shaft portion 13 formed in the middle part of the two is inserted move in the vertical direction in FIG. The lower blade 2 fixed to the front surface of the blade 7 moves in parallel in the vertical direction in FIG. As a result, the width of the gap between the end surface 2a of the lower blade 2 and the end surface 1a of the fixed upper blade 1 can be adjusted.

During this adjustment work, the distance between the center axis b of the rotating shaft 12 and the screw pieces 17, 17, and the distance between each arm 15, 1
5 and the threaded rod 20 is the angle made by the threaded piece 1.
7, 17 change as they move along the screw rod, each screw piece 17, 17 has a pin 18, 18 protruding from the upper and lower surfaces of each arm 15, 15's forked part 1.
By fitting the elongated holes 22, 22 formed in the forked part 6, it is provided inside the forked part 16 so that it can be rotated and moved slightly in the length direction of the arm. The amount of change in is absorbed sufficiently, and smooth adjustment can be performed with light force.

Furthermore, since the distance traveled by the holder 7 to which the adjustment side blade is fixed is much smaller than the amount by which the handle 21 is rotated, the gap between the blades can be finely adjusted. The amount by which the handle 21 is rotated and the amount by which the holder 7 is moved in parallel depend on the pitch of the screw and the eccentric shaft portion 1.
3, the length of the arms 15, 15, etc., so it is convenient to provide a scale indicating the amount of movement of the holder 7 near the handle 21 when adjusting the above-mentioned gap. . Note that since the rotation shafts 12 and the arms 15 at both ends of the holder 7 are made the same, the parallelism of the upper and lower blades 1 and 2 does not collapse during adjustment.

In addition, in the above-mentioned embodiment, the upper and lower blades 1 and 2
Although the upper blade 1 is fixed and the lower blade 2 is adjustable, it is not limited to the lower blade 2, but the upper blade 1 may also be adjusted. When the upper blade 1 is made adjustable in this way, the lower blade 2 moves up and down during cutting work, so the eccentric shaft portion 13 only needs to freely engage the bearing 9 in rotation, and the bearing 9 is connected to the eccentric shaft portion. It is not necessary to be able to move up and down relative to 13. Even if the lower blade 2 is on the adjustment side, the same applies if the upper blade 1 is moved up and down during cutting work.

(Effect of the invention) The shear gap adjustment device of the present invention is configured and operates as described above, so that the width of the gap between the upper and lower blades can be adjusted easily and quickly without staining hands or clothes. Moreover, since it allows for precise and delicate adjustments, it is possible to cut metal plates under the best conditions.

[Brief explanation of the drawing]

Fig. 1 is a partial side view of the shearing machine, Figs. 2 to 4 show embodiments of the present invention, Fig. 2 is a perspective view with the adjusting device partially omitted, and Fig. 3 is a plan view. Fourth
The figure is a sectional view taken along the line AA in FIG. 3. 1...Upper blade, 1a...End face, 2...Lower blade, 2a
...End face, 3...Metal plate, 4...Frame, 5...
...Holder, 6...Mounting bolt, 7...Holder, 8
... bearing hole, 9 ... bearing, 10 ... bearing,
11... Frame, 12... Rotating shaft, 13... Eccentric shaft portion, 14... Bearing, 15... Arm,
16...Forked part, 17...Screw piece, 18...Pin, 19...Threaded hole, 20...Threaded rod, 21...
Handle, 22... long hole.

Claims (1)

[Scope of utility model registration request] Attached to a shearing machine that cuts metal plates by bringing two opposing blades closer together, it adjusts the width of the gap formed between the end surface of one blade and the end surface of the other blade when the two blades are brought closer together. In this device, a pair of bearings each having a bearing hole opened in the direction of movement of the blade is fixed to both ends of the rear side of a holder with one blade fixed to the front side, and a shearing machine is installed in the bearing hole of each bearing. An eccentric shaft part is formed in the middle part of a rotating shaft rotatably supported on the frame of the rotating shaft, and the central axis is located away from the central axis of this rotating shaft.An eccentric shaft part is rotatably inserted into each rotating shaft. A screw piece having a screw hole is attached to the distal end of the arm with the base end fixed so that it can be rotated and moved slightly in the length direction of each arm,
In the screw hole of each screw piece, parallel to the above two blades,
A gap adjustment device for a shearing machine, which is supported by a frame of a shearing machine so as to be able to freely rotate only in the twisting direction, and is formed by screwing together the middle part of a single threaded rod having a handle at one end.