JPH045217Y2 - - Google Patents

Description

[Detailed explanation of the invention] Industrial field of use This invention has the upper and lower blades, respectively,
The present invention relates to a plate holding device in a so-called right-angle shearing machine that is bent at right angles along an axis (referring to any two axes that are orthogonal to each other in a horizontal plane; the same applies throughout this specification).

BACKGROUND ART A so-called right-angle shearing machine in which upper and lower blades are bent at right angles along the X-axis and Y-axis directions is known, for example, from Japanese Patent Publication No. 7850/1983.

However, in the plate holding device of the above-mentioned right angle shearing machine, the plate holding member along the X axis and the plate holding member along the Y axis are formed into several small blocks that move up and down independently within the portions along each axis. For example, as shown in FIG. 9, by operating only the small block 1 near the end of the section along the Although it has the advantage of being able to provide a plate-holding effect, it also has the following drawbacks.

That is, the small blocks 1 are pressed downward by the fluid cylinders 2 connected to each other, and since the pressing force is always constant, the operating state is as shown in FIG. 9, for example. The rightmost block 1a of the small blocks 1 in the block 1 only partially hangs over the end of the plate W,
Furthermore, if that portion was a very small area, the posture of the block 1a itself could be tilted due to the pressing force of the fluid cylinder 2. For this reason, as shown in an enlarged view in FIG. 9, the corner Wa of the end of the plate material W is crushed by the inclined bottom surface of the block 1a, resulting in a problem of lowering the commercial value.

In order to eliminate the above-mentioned fear, it is extremely complicated to control the process of detecting the insertion state of the plate material W into the shearing machine and changing the pressing pressure of each small block depending on the depth and shallowness of the insertion state. becomes impractical.

Problems that the invention aims to solve This invention aims to solve the problems mentioned above.

Means to Solve the Problem In order to solve the above-mentioned problem, this invention is designed to rotatably attach a cover body that covers the outside of the upper blade to the machine frame that supports the upper and lower blades whose plane shape is bent at right angles. , a plate holding member is disposed between the upper blade and the cover body, the plate holding member corresponding to at least one side of the right-angled upper blade is integrally configured, and the cover body is pivotally supported on the inner surface of the cover body. An arm member is provided protruding from a plurality of locations in the axial direction of the rotating shaft, the arm member and the plate holding member are pivotally connected via a link member, and the arm member is provided protruding from the cover body and the rotating shaft. A driving cylinder corresponding to the integrally configured plate holding member is installed between the cover body and the plate holding member is moved vertically evenly over the entire length by driving the cylinder. It is composed of

Example Examples will be described below with reference to FIGS. 2 to 8.

That is, Figures 2, 3, and 4 are a front view, left side view, and right side view showing the outer shape of the right angle shearing machine, respectively, and Figure 5 is an internal plan view with a part of the top plate cut away. Fig. 6 is an internal plan view with the blade drive mechanism such as cylinders and links and the plate holding device 3 removed, Fig. 1 is a front view of the plate holding device, and Fig. 7 is the upper and lower blades.
FIG. 3 is a schematic perspective view showing the support mechanism and drive mechanism of BU, BL, and the upper blade BU.

The machine frame 4 has a substantially rectangular parallelepiped shape, and has a slit-like notch 5 extending horizontally in the front surface. 5a and 5b are the edges of the notches on the left and right sides, respectively. The notch 5 on the right side is wide enough to allow a conveyor (not shown) for discharging cut pieces to pass through.

6 and 7 are upper blade covers (cover bodies) attached to the front and left side via hinges 8 and 9 so as to be openable and closable (as shown in Figure 5), and inside the upper blade covers 6 and 7, respectively. A plate holding device 3 is provided which is driven up and down by cylinders 11 and 12. The plate holding device 3 will be described in detail later.

Note that 13 is a table provided on the front and left side surfaces around the notch, 14 and 15 cover the machine frame surface above the blade covers 6 and 7, and cover the machine frame surface above the blade covers 6 and 7.
1 and 12, and 16 is a cover plate that can be flipped upward to hide the cover plate, 1.
Mounting hinges 4 and 15 and 17 are telescopic gas springs for supporting the cover plates 14 and 15 when they are flipped upward and opened.

The support mechanism and drive mechanism of the upper blade BU will be explained below.

That is, the lower blade BL is bolted to the lower side of the notch 5 as shown in the second, third, and fourth figures, but the upper blade BU has guide post portions 19a at both ends thereof by a guide mechanism 18, which will be described later. It is fixed to a ram 19 which is supported in a vertically movable manner and has a substantially right triangular shape in plan view, and is supported on the machine frame 4 so as to be vertically movable.

The upper blade BU is provided with a uniform inclination (rake angle) α with respect to the horizontal from one end of the blade to the other end via the intermediate bending part, and this inclination causes the upper and lower blades BU, BL to A shearing action occurs when the two mesh.

In this embodiment, the guide mechanism 18 that clamps and guides the guide post portions 19a at both ends of the ram 19 is similar to the one shown in the aforementioned Japanese Patent Publication No. 57-7850. teX,Y
Two pressing cylinders 21, 22 each that press in the axial direction, and a pair of wedges each supporting the guide post portion 19a by receiving the movement of the guide post portion 19a due to the pressing force of the pressing cylinders 21, 22. body 2
3, 24, 25, and 26. Therefore, the guide post portion 19a is surrounded by the pressing cylinders 21 and 22 and the wedge bodies 23 and 2.
4, 25, and 26, it is always supported by clamping pressure.

Further, the taper directions of the outer wedge bodies 23, 25 and the inner wedge bodies 24, 26 are reversed vertically, and the outer wedge bodies 23, 25 can be vertically inserted and removed using a clearance adjustment device (not shown). By doing so, the wedge body 24,2
The guide post portion 19a, which is constantly pressed by the pressure cylinders 21 and 22, moves in parallel along the X and Y axis directions of The entire ram 19 moves in parallel along the X and Y axes to adjust the clearance between the blades.

Next, to explain the drive mechanism, the drive mechanism of this embodiment includes three brackets 27 protruding from the ram 19, and a
The rotation shafts 31 and 32 are interlocked and connected via the link 28 and the crank plate 29, and the rotation shaft 3
It consists of hydraulic cylinders 33 for driving 1 and 32.

34 is a link plate that interlocks and connects the rotating shaft 31 and the rotating shaft 32. When the hydraulic cylinder 33 expands and contracts, each link 28 moves up and down by the rotating shafts 31, 32 and the crank plate 29, and the ram 19
is moving up and down. In FIG. 5, reference numeral 4a denotes a vertical wall portion for supporting one end of the rotating shaft 32, which is provided upright within the machine frame 4, and reference numeral 4b denotes a wall to which the cylinder 33 is connected. In addition, the hydraulic cylinder 33 of this embodiment is constructed by connecting two cylinders 33a and 33b that extend and contract independently back to back to form a cylinder that substantially extends and contracts in two stages and has two stages of long and short strokes. When only one cylinder 33a is extended and the ram 19 moves downward by approximately half a stroke, the blade portion of the upper blade BU extending along the X axis meshes with the lower blade BL. If a shearing action is applied to the plate material W only in the X-axis direction, both cylinders 33a and 33b are extended, and the ram 19 moves downward over the entire stroke, the upper blade BU and lower blade BL will mesh over the entire blade length. A series of shearing actions represented by orthogonal L-shaped shear lines are applied to the plate material W.
In other words, the upper blade BU has a uniform inclination (rake angle) α with respect to the horizontal line from one end of the blade on the right side of Figure 7 to the other end on the left side of the Figure through the intermediate bending part. , one cylinder 3
When only 3a is extended and the ram 19 moves downward by about half a stroke, the cutting progresses only in the portion parallel to the X axis due to the manner of the scissors. Therefore, by repeating the expansion and contraction of only one cylinder 33a and the feeding of the plate material, only linear shearing can be performed.

A plate holding device 3 as described below is disposed in front of the upper blade BU, which is guided and driven in a vertically movable manner as described above.

That is, the blade covers 6 and 7 have horizontal cross sections 6a and 7a as shown in the first drawing.
and side plate portions 6b and 7b bent in a dogleg shape, each of which is formed into a hollow frame having an internal space extending long in the X and Y axis directions, and protrudes from the side plate portions 6b and 7b. The rotating shafts 36, 37 are rotatably supported by the bearing bracket 35, and the arm plates 38, which are fixed to the rotating shafts 36, 37, are connected to the arm plates 38 via links 39. The plate holding members 41 and 42 are connected 43.

Among the arm plates 38, the link 3 is attached to the arm plate 38 near the intersection of the X and Y axes.
In addition to the arm portion 38a connecting the cylinders 9, another arm portion 38b is formed protrudingly, and the rods 11 of the cylinders 11 and 12 are attached to the arm portion 38b.
The a and 12a ends are connected. 44 is cylinder 1
1 and 12 blade cover top plate portions 6a and 7a
This is a fixed bracket.

Further, 45 is a cylindrical member fixed to the side surface of each plate holding member 41, 42, and the cylindrical member 45
A guide pin 46 passing through the inside in the vertical direction is fixed to the blade cover side plate portions 6b, 7b, so that each plate holding member 41, 42 is accurately guided along the vertical direction and moves up and down. It's summery.

The right angle shearing machine of this example is
As described above, the cylinder 3
When the shearing action is performed by extending the full stroke of the plate 3, the corner of the plate material W inserted into the notch 5 is sheared along the L-shaped cutting line to obtain the desired shape and size, as shown in Figure 6. A rectangular blank material is cut out, and after extending the cylinder 33 by half a stroke to form a straight sheared part along the X-axis direction on the surface of the plate material W, the plate material is further fed and moved in the X-axis direction,
By repeating the half-stroke or full-stroke extension operation of the cylinder 33, it is possible to cut out an elongated rectangular blank extending in the X-axis direction from the plate material W. Prior to full stroke operation, the plate holding device 3 is operated as follows.

That is, in the above embodiment, the cylinder 1
1 and 12 respectively to rotate the rotation shafts 36 and 37, and further extend the arm plate 38 and the link 39.
The plate holding members 41 and 42 are moved downward through the plate holding members 41 and 42, and the plate material W on the table 13 is pressed and fixed downward by the downward movement of the plate holding members 41 and 42. Pressing members 41, 4
2, since the parts along the X and Y axes are integral, a large pressing force acts locally on the edge of the plate W as described above, causing the edge of the plate to be improperly deformed. There is no chance that you will be rejected.

In addition, in the above embodiment, the plate holding members 41 and 42 are integrated for each portion along the X and Y axes,
Drive mechanism of each plate holding member 41, 42 (cylinder 1
1, 12) are provided separately, so X,
It is possible to operate the plate holding member 41 or 42 only in the Y-axis direction, and for example, in the case of only cutting work along the X-axis to the plate material W surface by half-stroke extension of the cylinder 33, the above-mentioned operation can be performed. It is also possible to speed up the work by operating only the plate holding member 41 along the X axis.

Further, the plate holding device 3 of the above embodiment has X, X,
Since it is provided inside the blade covers 6 and 7 along the Y-axis direction, inspection and repair can be performed very easily by opening the blade covers 6 and 7 as shown by the chain lines in FIG. However, as shown in FIG. 8, for example, the upper blade cover (cover body) 47 is integrally L-shaped in plan view, and there is a circuit connected within the blade cover 47 by bevel gears 48, 48. The rotating shafts 36 and 37 are supported, and plate holding members along the X and Y axes are connected to the rotating shafts 36 and 37 via arm plates and links, respectively, in the same manner as in the above-described embodiment. ,37
The plate holding members along the X and Y axes may be moved up and down at the same time by expanding and contracting a single cylinder 49 that is interlocked with any one of the cylinders. In the case shown in the eighth diagram above, X,
Since the plate holding member along the Y axis always moves up and down at the same time, the plate holding member is an integral member (L-shaped integral member in plan view) over the entire length along the X and Y axes.
It may be done as follows.

Effects of the invention As is clear from the above explanation, the plate holding device of this invention has the following effects.

Regardless of the state of insertion of the plate into the shearing machine, the plate holding member always moves up and down while maintaining a parallel state. Therefore, it is possible to prevent the occurrence of defective products such as the corners of the ends of the plate being crushed due to the inclination of the plate holding member due to uneven contact.

Since the plate holding member is provided on the back side of the rotatable cover body, the plate holding member is not exposed to the operator and is safe. If you open it like the state,
On the contrary, the entire plate holding member can be exposed to the operator side, making maintenance work easier.

Since the drive cylinder for the plate holding member is attached to the cover body, when the cover body is opened for maintenance work, the plate holding member can be actually moved up and down to check the operating state.

The plate holding member and the drive cylinder are interlocked and connected by a plurality of arm members and link members, so that the plate holding member moves vertically evenly over its entire length even though it is a single driving cylinder. Since the plate holding member corresponding to at least one side of the blade shape is integral, an even pressing force can be applied over the entire length of the L-shaped cutting line of the plate material.

The connection structure between the plate holding member and the drive cylinder is
Since it is composed only of a rotation shaft, an arm, and a link member, this connection structure can be compactly provided on the back surface of the cover body.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view of the plate holding device (the cross section is taken along the - line in Fig. 5), Fig. 2 is a front view showing the outline of the right angle shearing machine, Fig. 3 is a left side view of the same, Fig. 4 is a right side view of the same, Figure 5 is a plan view of the internal structure with a part of the top plate cut away, and Figure 6 is a plan view of the inside of the machine frame with the upper blade drive mechanism and plate holding device removed. , Fig. 7 is a schematic perspective view showing the upper and lower blades and the support mechanism and drive mechanism for the upper blade, Fig. 8 is a plan view of a right angle shearing machine in another embodiment, and Fig. 9 shows the structure and structure of the conventional device. It is an explanatory diagram showing an effect. 3... Plate holding device, 4... Machine frame, 6, 7... Upper blade cover (cover body), 11, 12... Cylinder, 11a, 12a... Rod, 36, 37
...Rotation axis, 38...Arm plate, 38a,
38b...Arm part, 39...Link, 41,4
2... Plate holding member, 47... Upper blade cover (cover body), 49... Cylinder, BU... Upper blade, BL... Lower blade, W... Plate material.

Claims (1)

[Scope of utility model registration request] In a plate holding device for a right-angle shearing machine, a cover body that covers the outside of the upper blade is rotatably attached to a machine frame that supports upper and lower blades whose planar shape is bent at right angles, and a cover body that covers the outside of the upper blade is rotatably attached to a plate holding member is disposed at the plate holding member, and the plate holding member corresponding to at least one side of the right-angled upper blade is integrally constituted, and at a plurality of locations in the axial direction of the rotation shaft pivotally supported on the cover body on the inner surface of the cover body. An arm member is provided protruding from the plate, the arm member and the plate holding member are pivotally connected via a link member, and the integral member is provided between the cover body and the arm member protruding from the rotation shaft. A light characterized in that a drive cylinder corresponding to the configured plate holding member is installed on the cover body, and the plate holding member is moved vertically evenly over the entire length by driving the cylinder. Plate holding device for angle shearing machines.