JP2004314124A - Folding mechanism for wire netting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a folding mechanism capable of dealing with changes in the working profile at the ends of wire netting and the sizes and spacing of the wire netting simply by changing pressure dies and a bending mechanism capable of rapidly and efficiently executing end portion working of the polygonal shape by using the folding mechanism. <P>SOLUTION: The mechanism funtions to simultaneously fold a plurality of the ends of the wire netting to the polygonal shape. A plurality of C frames having centers aligned to the bending centers at the ends of the wire netting are installed in juxtaposition so as to align each of a plurality of the central axes. Bending dies having the corners aligned to the bending centers and sheet-like pressure dies freely advanceable and retreatable toward and from the bending centers are disposed in the C frames respectively pivotably along the inside surfaces of the C frames. In addition, support dies for holding the ends of the wire netting to be charged into the C frames in the prescribed position inclusive of the bending centers are arranged. As a result, the ends of the wire netting are surely folded to the prescribed shapes by the pivoting of the bending dies, and the pivoting and retreat and advance actuation of the pressure dies. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an apparatus for bending a wire mesh, and more particularly to an apparatus for bending upper and lower ends of a welded wire mesh used for a fence or the like into a polygonal shape.
[0002]
[Prior art]
BACKGROUND ART In recent years, welded wire meshes having excellent design properties have been widely used as fences to be provided on enclosures and boundaries of apartment buildings and detached houses. This welding wire mesh is formed by assembling a predetermined number of vertical wires and horizontal wires in a lattice shape and welding them. When used as a fence, it is necessary to process the upper and lower ends of the vertical wires into a round shape or a polygonal shape.
2. Description of the Related Art Conventionally, a method of winding a wire mesh end around a mandrel to form a cylindrical shape, a device for bending a wire mesh end into a substantially cylindrical basket shape using a mold composed of a male mold and a female mold (see Patent Document 1), 2. Description of the Related Art There is known an apparatus (see Patent Document 2) for manufacturing a wire mesh basket or a reinforcing bar cage using a bending apparatus including a body bending mechanism and a mesh body holding mechanism. Further, a processed product into a polygonal shape such as a pentagon or a boat has been demanded for emphasizing the design property of the end portion of the wire mesh. To respond to such a demand, for example, as shown in Patent Document 3, welding is performed. The wire mesh is composed of a gooseneck-type upper mold and a lower mold with a die having a V-shaped groove in the longitudinal direction. A folding device and a processing method are disclosed.
[0003]
[Patent Document 1]
Japanese Patent Publication No. 2805284 [Patent Document 2]
JP 2001-205381 A [Patent Document 3]
Japanese Patent Publication No. 3032760 [0004]
[Problems to be solved by the invention]
In the conventional method in which the end of the wire mesh is wound around the mandrel and formed, it is necessary to change the mandrel every time the bent shape of the product is changed, and it takes time and effort to exchange. In the method of molding by pressing a wire mesh against a mold or the like as described above, there is an inconvenience that it is difficult to obtain a beautiful shape due to the return of the wire rod after processing. Further, in the apparatus as disclosed in Patent Document 3, when changing the product shape, only the upper mold needs to be replaced, but it is difficult to accurately control the bending angle when processing into a polygon, and the upper mold itself is a gooseneck. It was not easy to process into a shape, and there was a problem in practicality. In any case, in the conventional method, since the wire mesh itself is formed while being rotated, there is a problem that only one end of the wire mesh can be formed.
[0005]
The present invention has been made to solve the problems of the conventional technology, and can change the processing shape of the wire mesh end portion, and can change the size of the wire mesh and the gap by changing only the presser die, Provided is a bending device capable of reliably performing beautiful polygonal edge processing, and a bending device capable of efficiently performing polygonal edge processing in a short time by using the bending device. Is what you do.
[0006]
[Means for Solving the Problems]
The gist of the present invention for solving the above problems is as follows.
(1) In an apparatus for simultaneously bending a plurality of ends of a wire mesh into a polygonal shape, a plurality of C-shaped frames having centers matching the bending centers of the ends of the wire mesh are arranged side by side so that their respective central axes coincide. In the mold frame, a bending mold having a corner portion aligned with the bending center, and a plate-shaped holding mold that is movable toward and away from the bending center are provided so as to be pivotable along the inner surface of the C-shaped frame, A receiving die for holding the end of the wire mesh at a predetermined position including the bending center in the C-shaped frame is disposed, and the wire mesh end is bent into a predetermined shape by the turning of the bending die and the turning and advance / retreat operations of the holding die. Wire mesh bending device.
(2) The bending die and the presser die are respectively attached via a base rotatably provided on a C-shaped frame, and the presser die is replaceably mounted on the base and corresponds to the interval between the ends of the wire mesh to be bent. The bending device according to (1), wherein the bending device has a groove.
(3) A pair of the bending devices according to (1) or (2) is installed to face each other with a wire mesh fixed in a horizontal position, and the pair of bending devices can be moved along the bending direction and positioned. A wire mesh bending device wherein both ends of the wire mesh are simultaneously bent into an arbitrary polygonal shape without moving the wire mesh.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view showing a specific example of the bending apparatus according to the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a view showing only a main driving part of FIG. In order to bend the end portion of the welded wire mesh 12 (upper and lower ends of the vertical wire when it becomes a product fence) into a predetermined polygonal shape, the bending apparatus of the present invention uses the bending die 1, the pressing die 2, and the receiving die (flat). Base) 3, the bending die 1 having a rectangular cross section is provided at the tip of the bending base 4, the plate-shaped pressing die 2 is located at the tip of the pressing die base 5, and the receiving die 3 is located at the upper end of the receiving die base 6. Installed. As shown in FIG. 1, the bending mold base 4 and the press mold base 5 are held so as to be able to turn (rotate) along the inner surface of the C-shaped frame 7, and the C-shaped frame 7 The base 8 is installed on the base 8, and is configured to move back and forth in parallel (in the bending direction) with the wire rod of the wire net 12 to be bent by the base moving drive unit 11 (motor).
As this moving mechanism, for example, as shown in the figure, a nut part 14 fixed to the base 8 may be engaged with a screw part 13 rotated by a motor 11, and the screw part may be moved forward and backward by forward and reverse rotation. The present invention is not limited to this, and other known reciprocating mechanisms can be appropriately employed. 1 and 2, reference numeral 15 denotes a rail, and 16 denotes a guide provided on the bottom surface of the base 8 that slides along the rail 15.
[0008]
As described above, the C-shaped frame 7 holds the bending-type base 4 and the pressing-type base 5 so as to be able to swivel at the C-shaped portion. Only this swivel mechanism is taken out and shown in FIG. As shown in FIG. 3, a chain 17 is provided on the innermost surface of the C-shaped portion, and sprockets 18 and 19 which mesh with the chain 17 are provided on the bending-type base 4 and the holding-type base 5, respectively. The drive unit 9 drives the sprocket 18 of the bending die base 4, and the drive unit 10 drives the sprocket 19 of the holding die base 5, thereby turning and stopping to an arbitrary rotation angle position, thereby turning the bending die 1 and the holding die 2. Determine the angular position with respect to the bending center. In FIG. 3, a rail 20 is provided on the C-shaped frame 7 side, and rollers 21 and 22 are provided on the base side so as to sandwich the rail 20 in order to smoothly perform the turning operation of the bending-type base 4 and the holding-type base 5. ing.
[0009]
In the present invention, the center of the C-shaped portion of the C-shaped frame 7 is the turning center of the bending die base 4 and the pressing die base 5, and the turning center is a bending for bending the wire mesh end. Also coincides with the center. In FIG. 1, a bending center (turning center) O is located at a corner of the upper end of the bending die 1 on the wire mesh side, and this position is on an advancing / retreating line directed by the presser die 2. It also coincides with the corner on the anti-wire mesh side. When the bending die 1 is at the bending start position (origin position), the upper surfaces of the bending die 1 and the receiving die 3 coincide with each other, and they are almost in contact with each other.
[0010]
As shown in FIG. 2, a plurality of C-shaped frames 7 are arranged in parallel at intervals along the axis of the bending center O, and each frame has a bending-type base 4, a holding-type base 5, and a receiving base. Although the mold base 6 is provided, the bending mold 1, the holding mold 2, and the receiving mold 3 extend so as to connect the respective C-shaped frames 7 along the axis of the bending center O. The plurality of bending-type bases 4 and the holding-type bases 5 provided on each C-shaped frame 7 are connected by the same drive shaft as shown in the drawing for the same base. Rotation), but each of the bending die base 4 and the presser die base 5 independently rotates. The number of the C-shaped frames 7 is preferably at least three or more (four in FIG. 2), although it depends on the number and interval of the vertical wires to be bent in the welding wire netting.
[0011]
Among the dies used for bending the ends of the wire mesh, the plate-shaped holding die 2 is configured to be able to advance and retreat toward the bending center O. For example, as shown in FIG. 2, the forward / backward mechanism is configured such that a mold mounting member 23 having a presser die 2 detachably mounted at one end is fixed to a rod tip of a hydraulic cylinder 24 installed on the C-type frame 7. The lifting die 24 moves the presser die 2 forward and backward with respect to the bending center O, and presses the end of the wire mesh at an arbitrary turning angle as necessary. Further, the presser die 2 has a plurality of grooves 25 formed at a lower portion thereof corresponding to a pitch (interval between vertical wires) of a wire mesh end portion to be bent. The groove 25 of the presser die 2 avoids interference when the wire mesh tip and the presser die 2 interfere with each other due to the turning angle at the time of final bending of the end of the wire mesh, because the wire mesh tip enters the groove. obtain. When the pitch of the wire mesh end or the size of the wire mesh is changed, the presser die 2 may be pulled out from the mounting member and changed to a presser die having a groove or a size matching the next pitch or size.
[0012]
Next, an operation example of bending the wire net end into a pentagonal shape using the above-described bending device according to the present invention will be described based on the four-step bending process shown in FIGS. In these figures, one wire rod to be bent is taken as an example for the sake of convenience. However, in practice, a plurality of (about 30 to 50) vertical wire rod ends arranged in a horizontal wire rod of a wire mesh are simultaneously used. Although the wire is bent and the wire side is moved in accordance with the progress of the sequential bending step, the wire and the C-shaped frame need only be relatively moved, and as shown in FIG. You can also move the side. Further, the bent shape may be any shape such as a circle, a boat, etc. other than the pentagon.
[0013]
First, as shown in FIG. 4A, a wire 12 to be bent is introduced from the left side of the drawing, and set on a receiving mold (flat base) 3 in a C-shaped frame 7 of the present invention. At this time, the distal end of the wire is bent in an L-shape in advance over a predetermined length, and a part of the distal end extends from the receiving mold 3 to the bending mold 1. At the start, the bending die 1 (bending die base 4) is at the position of 6 o'clock (clockwise) at the lower end, and the presser die 2 (presser die base 5) is at 12 o'clock and its tip reaches the bending center O. Extending. In this state, the turning drive units (motors) 9 and 10 are operated to turn the bending-type base 4 and the presser-type base 5 in a counterclockwise direction (the turning angles do not match). While holding the bending center O, the tip end of the wire mesh protruding from the receiving mold 6 with the bending mold 1 is bent upward with O as a fulcrum. Finally, as shown in FIG. 4 (b), the bending die 1 is at a position slightly beyond 90 ° (turning angle from the starting point) from the starting point (origin), and the presser die 2 is at a position exceeding 55 ° from the starting point. Ends the first stage bending.
[0014]
When the first-stage bending is completed, the bending die 1 is returned to the original position by the clockwise rotation of the base 4, and the presser die 2 is retracted from the bending center O by the cylinder, and is returned to the original position by the clockwise rotation of the base 5. Return to position and prepare for second stage bending. FIG. 5A shows a state in which the wire rod 12 is further fed to the bending mold side by a predetermined length, and the pressing die 2 has advanced to the bending center O. From this state, the bending die base 4 and the pressing die base 5 are moved. By turning counterclockwise in the same manner as described above, the tip end of the wire mesh is bent upward by the bending die 1 while pressing the bending center O by the pressing die 2. Finally, as shown in FIG. 5B, the bending die 1 finishes the second-stage bending at a position slightly more than 60 ° from the start point, and the presser die 2 at a position near 50 ° from the start point.
[0015]
Similarly, after the return of the bending die 1 and the press die 2 to the origin and the further feeding of the wire are performed, the third stage bending is started from the position shown in FIG. By turning the bending die base 4 and the presser die base 5 at a predetermined angle in the counterclockwise direction in the same manner as described above, finally, as shown in FIG. Then, the presser die 2 finishes the third-stage bending at a position near 45 ° from the starting point.
[0016]
In the final fourth stage bending process, the bending is performed from the origin position in FIG. 7A to the final bending position in FIG. 7B by the same operation as described above. Is at a position near 65 ° from the start point, the presser die 2 is at a position exceeding 40 ° from the start point, and the wire rod tip bent to about 90 ° by the first stage bending interferes with the presser die 2. However, since a groove corresponding to the pitch of the wire ends (the wire pitch in the direction orthogonal to the bending direction) is formed in the presser die 2, the wire tip does not enter this groove and hinders the bending operation. Absent.
[0017]
In the actual bending of the wire mesh end, when the end shape of the final product is determined, the turning angle and the turning speed of the bending die 1 and the presser die 2 in each bending step (process), the wire rod end Is set in advance for each stage, and each drive unit is controlled in accordance with these set values to automatically form an end of a desired shape. The bending angle of the wire is slightly larger than the bending angle of the final product in consideration of the bending return.
[0018]
Further, a method for performing the most efficient wire mesh bending operation using the apparatus of the present invention will be described.
FIG. 8 shows an equipment arrangement for simultaneously forming the upper and lower ends of a fence as a final product into a desired polygonal shape, and a device 26 for holding and fixing the welding wire mesh 12 to be bent in a substantially horizontal posture, A pair of C-shaped frames 7a and 7b each having a bending die, a holding die, and a receiving die for bending both ends of the target wire mesh are installed facing each other on the same stand with the wire mesh interposed therebetween, and the wire mesh is fixed without moving. The bending operation is performed in such a manner that the opposing C-shaped frames 7a and 7b move closer to each other in accordance with the progress of the bending step. The movement of the C-shaped frame may be performed using the moving mechanism shown in FIG. Of course, the shapes of both ends of the wire mesh may be the same or different.
[0019]
【The invention's effect】
According to the bending apparatus according to the present invention described above, the following effects can be expected.
(1) Since the polygonal bending operation of the wire mesh end is always performed with the same bending center as a fulcrum, and the bending die, the movable holding die and the receiving die are rationally arranged, any bending work can be performed. Can be performed reliably and with high precision, and a beautiful polygonal wire mesh end can be easily obtained.
(2) It can be said that it is excellent in productivity and economical efficiency because it is possible to easily cope with a change in the size and the interval of the wire mesh by replacing only the presser die.
(3) Since the same bending device is opposed to each other with the wire mesh fixed in a horizontal posture, both ends can be bent at the same time, and the processing time can be reduced.
[Brief description of the drawings]
FIG. 1 is a front view showing a specific example of a bending device according to the present invention.
FIG. 2 is a side view of FIG.
FIG. 3 is a side view showing only a driving part in the apparatus of FIG. 1;
FIG. 4 is a diagram showing a first-stage bending step in the case where the pentagonal wire mesh end is bent using the bending apparatus of the present invention.
FIG. 5 is a view showing a second-stage bending step following FIG. 4;
FIG. 6 is a view showing a third-stage bending step following FIG. 5;
FIG. 7 is a view showing a fourth-step bending step following FIG. 6;
FIG. 8 is a view showing an example of a processing device for simultaneously bending both ends of a wire net using a pair of bending devices of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bending type 2 Pressing type 3 Receiving type (flat base) 4 Bending type base 5 Holding type base 6 Receiving type base 7 C type frame 8 Frame base 9 Bending type base drive unit (motor) 10 Press type drive unit (motor)
DESCRIPTION OF SYMBOLS 11 Base movement drive part 12 Wire rod 13 Screw part 14 Nut part 15 Rail 16 Guide 17 Chain 18, 19 Sprocket 20 Rail 21, 22 Roller 23 Type mounting member 24 Holding type advance / retreat cylinder 25 Holding type groove 26 Wire holding and fixing device

Claims (3)

In an apparatus for simultaneously bending a plurality of ends of a wire mesh into a polygonal shape, a plurality of C-shaped frames having a center corresponding to a bending center of an end of the wire mesh are arranged side by side so that respective center axes coincide with each other. In addition, a bending mold having a corner portion corresponding to the bending center and a plate-shaped holding mold that is movable toward and away from the bending center are provided so as to be pivotable along the inner surface of the C-shaped frame, respectively. Characterized by disposing a receiving die for holding a wire at a predetermined position including a bending center in a C-shaped frame, and bending the wire net end into a predetermined shape by turning the bending die and turning the holding die and moving forward and backward. Bending device. The bending die and the presser die are respectively mounted via a base rotatably provided on the C-shaped frame, and the presser die is replaceably mounted on the base and has grooves corresponding to the intervals between the ends of the wire mesh to be bent. The bending device according to claim 1, further comprising: A pair of bending devices according to claim 1 or 2 are installed facing each other across a wire mesh fixed in a horizontal position, and the pair of bending devices are movable along the bending direction, and the positioned wire mesh is moved. A wire mesh bending apparatus wherein both ends of the wire mesh are simultaneously bent into an arbitrary polygonal shape.

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