JPH0646584Y2 - Bender head of vertical long continuous bending device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention has a center guide and a bending roller arranged in a vertical plane, and a center roller that can move back and forth in the axial direction is retracted to bend a long object. The present invention relates to a bender head of a vertical type long continuous bending apparatus capable of continuously bending a long object by removing the bent head from the bender head.

[Conventional technology]

Generally, in a device for bending a long object, a long object such as a reinforcing bar or an iron pipe is arranged between a center guide such as a center roller and a bending roller rotatable around the center guide. It The bending roller rotates (revolves) around the center guide to bend the long object at a predetermined angle.

The bending process includes right-angled bending (90 ° bending), hook bending (135 ° bending), 180 ° bending, etc. For long products, continuous bending that continuously performs these bending processes is often used. Is being done. For example, in the case of a reinforcing bar for a columnar bar, both ends of the reinforcing bar as a long product are bent in the same direction, for example, upward by 135 ° to form a hook shape, and right angle bending is repeated three times and bent to form a so-called hoop bar. is doing.

In order to perform such continuous bending efficiently,
BACKGROUND ART There is known a long-length continuous bending apparatus in which a plurality of bender heads including a center guide and a bending roller are arranged in parallel, usually 3 or 5 sets. A long-material continuous bending apparatus having three or five bender heads arranged in parallel is called a three-head or five-head long material continuous bending apparatus. The center guide of the bender head is housed in a horizontal cylinder and can move back and forth in the axial direction.
It is arranged in a vertical plane together with the bending roller. Here, the cylinder is rotatably provided, and the bending roller is attached to a crank arm integral with the cylinder, and is rotated together with the crank arm and the cylinder. The bending roller rotates around the center guide to bend the long object between the center guide and the bending roller upward. Here, the center guide of the bender head that is not bent is retracted and removed from the locus of the long object (bending locus of the long object) in the bending process so as not to hinder the bending process.

In this way, since the center guide of the bender head and the bending roller are disposed on the vertical surface and the long object is bent on the vertical surface, this type of bending apparatus is called a vertical long object continuous bending apparatus. Be seen.

According to the vertical long continuous bending apparatus, the long object can be continuously bent by controlling the forward / backward movement of the center roller of the bender head and the pivoting movement of the bending roller appropriately, thereby increasing efficiency. Can be bent.

[Problems to be solved by the device]

The center guide is slidably supported in the cylinder, and by supporting the free end of the center guide that has advanced in the axial direction with the hole provided in the support wall, the center guide is supported from both ends, and high rigidity is secured. There is. The distance between the cylinder and the support wall is, for example, about 104 mm, and a long object such as a reinforcing bar is conveyed by being arranged in parallel between the cylinder and the support wall by several to 10 pieces depending on the diameter. It Then, the bending roller rotates around the center guide,
A long object is bent at the same time, and the bent reinforcing bar is extended upward.

Since as many long objects as possible are arranged side by side and conveyed, the total width of long objects conveyed at the same time (diameter of long object x
The number) is set to a value slightly smaller than the distance between the cylinder and the support wall, so that no gap is left between the cylinder and the support wall and the elongated object.

In the case of a hoop bar made by bending a reinforcing bar into a rectangle, the bending step of bending both ends of the reinforcing bar in the same direction by 135 ° to form a hook is performed first, and the bending step of the part facing the hook end is performed last (No. (See Fig. 4). Since the hook ends overlap in the final bending step, the total width of the long objects at the hook ends is doubled from the horizontal side located at the lower end. The final bending step is usually as shown in FIG.
This is done using the central vendor head.

The total width of the long object is minimum at the horizontal side of the lower end and maximum at the hook end, and the rate of increase, in other words, the inclination is smaller as the vertical side of the long object is longer. As shown in FIGS. 4 (A) and 5 (A), in the square hoop muscle, one side is relatively long, and overlapping hook ends are sufficiently separated from between the cylinder and the support wall. Therefore, the inclination of the total width of the long object is relatively small. for that reason,
The total width of the long object inside the cylinder and the supporting wall does not increase so much, and the increase is sufficiently compensated by the gap between the cylinder, the supporting wall and the long object, and the bending process can be performed without any trouble.

Usually, in the case of a vertical long continuous bending device for a five head, the bender head 4 is the fourth from the left (see FIGS. 6A and 6B), and in the case of a three head, the bender head C at the right end. The final bending step of the hoop muscle is performed by the center bender head without moving (see FIGS. 6C and 6D). Then, in the hoop muscle called a short shape in which the short side (vertical side) is sufficiently shorter than the long side (horizontal side), as shown in FIGS. 4 (B) and 5 (B), the vertical side is Is short, and the total width of long objects increases rapidly from the bottom to the top. Therefore, FIG. 6 (B), (D)
As can be seen from the above, in the case of the five head, the upper part of the inside of the bender head C on the right end in the case of the fourth bender head 4 from the left and in the case of the three head, the total width of the long object is the cylinder and the support wall. There is a risk of exceeding the interval.

If the total width of the long object exceeds the space between the cylinder and the support wall inside the cylinder and the support wall, galling occurs between the adjacent long objects, which makes smooth bending difficult.
Therefore, in forming a rectangular hoop line, the number of long objects to be bent at the same time must be reduced, and high work efficiency cannot be obtained.

The present invention aims to provide a bender head that can ensure high work efficiency even when forming a rectangular hoop muscle.

[Means for Solving the Problems]

To achieve this object, according to the present invention, in the bender head adjacent to the central bender head, notches are formed on both the surface of the cylinder that houses the center guide and the inner surface of the support wall that faces the cylinder. It is provided.
The notch is formed on the surface of the cylinder and the inner surface of the support wall at a position that compensates for the increase in the total width of the long object in the hoop muscle.

With the bender head adjacent to the center bender head,
As shown in FIG. 6, in the structure in which the bending roller of the central bender head is rotated clockwise, it is the bender head to the right of the central bender head. However, the bending roller of the central bender head may be rotated counterclockwise, and in this case, the bender head on the left side of the central bender head corresponds.

A guide hole is formed on the end surface of the free end of the center roller, and a guide pin that can be fitted into the guide hole is provided on a support wall facing the cylinder.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In the vertical long continuous bending apparatus for three-head, the final bending step of the hoop streak is shown in FIGS. 6 (C) and (D).
As shown in the figure, this is performed by using the center bender head B, and at this time, the bender head C on the right side is not moved and is placed in the same position. Therefore, the total width of a long object such as a reinforcing bar may exceed the space between the cylinder and the support wall in the upper left portion of the inside of the right bender head C, and the bender head C is the target of the present invention. It corresponds to the vendor head. Left and center bender heads
A and B also have the same configuration as the bender head C except that there is no notch described later. Below, the configuration common to the bender heads A, B, and C (basic configuration) is used. Shown as 10, and by substituting A, B, C,
The left, center, and right bender heads represent the bender heads.

As shown in FIG. 1, the bender head 10 is a frame 12 of a continuous bending apparatus for long objects formed by combining shape steel and the like.
It is located above.

The bender head 10 is configured to include a center guide that can move back and forth in the axial direction, for example, a center roller 14 and a bending roller 16 that rotates (revolves) around the center roller. The center roller 14 is slidably housed in the cylinder 15, and for example, the piston 18 of the cylinder is
And a collar 20 loosely fitted around the tip of the piston (free end) constitute a center roller, and a guide hole 22 is formed in the center of the end face of the piston tip (free end).
For long items with a small diameter, remove the collar 20 and
A center roller 14 consisting of 18 is used.

A support wall 24 is formed on the frame 12 so as to face the cylinder 15. In the embodiment, the support wall 24 has a through hole 25, and this hole is closed by a cover 26 to form the support wall 24. A guide pin 28 fitted in the guide hole 22 is bolted to the cover 26 of the support wall so as to face the guide hole.

The center roller 14 moves the piston 18 forward and backward (back and forth).
The guide pin 28 loosely fits in the guide hole 22 of the center roller to support the center roller at the forward position. Therefore, the center roller 14 is fixedly supported without leaving a gap in the axial direction and has a doubly supported beam shape, and a highly rigid structure having a large resistance force against a pressing force from the side can be obtained.

As is clear from FIG. 9 in addition to FIG. 1, the cylinder 15 has an oval shape that bulges downward, and the roller 30 is rotatably mounted on the shaft 29 fixed to the bulging portion 15a of the cylinder. Attached and the bending roller 16 is constructed. Cylinder
15 is rotatably disposed on the frame 12 with a bearing (not shown) interposed. When the driving force is transmitted to the cylinder 15, the cylinder rotates about the axis of the piston 18 along with the bending roller 16, and the center guide 14 and a long object between the bending rollers, for example, a reinforcing bar. 32 is bent by the rotation of the bending roller. Thus, the bulge 15a of the cylinder functions as a crank arm for the bending roller 16.

As shown schematically in FIGS. 6 (C) and (D), three bender heads 10 (A, B, C) are arranged side by side in the longitudinal direction of the frame 12, and normally, the bender heads on both sides are arranged. 10 (A, C)
Is movable and the central bender head is immovable.

If the final bending process of the hoop muscle is performed by the center bender head 10B without moving the right bender head 10C, in the case of the short hoop muscle, in the case of three head, the inside left upper part of the right end bender head 10C. The total width of the long object may exceed the distance between the cylinder 15 and the support wall 24. Therefore, the bender head 10 on the right end
In FIG. 2C, notches 32-1, 32-2 are formed in the surface of the cylinder 15 of the bender head and the inner surface of the support wall 24, as shown in FIGS.

Here, the total width of the reinforcing bar 31 is the cylinder 15, the supporting wall.
Positions where there is a risk of exceeding the interval of 24, that is, cylinder 15
Notch 32-1, 32-2 in the upper left part of the inner surface of the support wall 24
Is provided.

As described above, in the processing of the hoop streak, since the hook ends 31a overlap, the total width of the long object increases to twice the horizontal side located at the lower end. Therefore the notch 32-1,32-2
Considering this maximum value, the total width of is appropriate from the position of the hook end 31a of the hoop muscle, that is, whether the hook end is located inside the cylinder 15, the support wall 24 or outside. Is decided.

The widths of the notches 32-1, 32-2 may be uniform or may be wider toward the outside.

Such a notch 32-1,32-2, central bender head 1
Bending is performed by a continuous long object bending device provided in the bender head 10 (C) on the right side of 0 (B), and the cylinder 15 and the bending roller 16 are bent as indicated by the alternate long and short dash line on the left side of FIG. Bender head in the center by rotating the
10B, the bending process (final bending process) of the portion facing the hook end 31a is performed. When the final bending process is performed, as shown by the chain line in FIG.
Overlap and increase the total width of the plurality of reinforcing bars 32.
As shown by the alternate long and short dash line in FIG. 2, even if the overlapping portion overlaps with the upper left portion of the right bender head 10 (C), the surface of the cylinder 15 of the bender head 10 (C) and the support wall 24. The increase is compensated for in the notches 32-1, 32-2 in the upper left part of the inner surface. Therefore, even when forming a short hoop bar, it is possible to prevent galling between adjacent reinforcing bars. Therefore, it is possible to perform bending without having to reduce the number of long products that are simultaneously bent, and it is possible to secure high work efficiency.

In the embodiment, the cylinder 15 is provided with the bulging portion 15a and the bulging portion is used as the crank arm for the bending roller 16. However, the crank arm may be formed separately from the cylinder 15. However, if the crank arm is integrally formed with the cylinder 15 as in the embodiment, the structure is simplified.

The above-described embodiments are for explaining the present invention, and are not intended to limit the present invention in any way, and all modifications and alterations within the technical scope of the present invention are also included in the present invention. Needless to say.

For example, in both the long head continuous bending apparatus for five heads and the three heads, the bending roller 16 of the center bender head is configured to rotate in the clockwise direction, and a notch is formed in the upper left portion of the right adjacent bender head. 32-1 and 32-2 are provided. However, the bending roller of the central bender head may be rotated counterclockwise, and in this case,
A notch is provided in the upper right portion of the bender head adjacent to the left.

[Effect of device]

As described above, according to the bender head according to the present invention, the long object is pushed into the notch formed in the cylinder surface and the inner surface of the support wall, and enters the long object. The increase in the total width of is compensated for by the notch. Therefore, even when forming a short hoop muscle, it is possible to prevent galling of an adjacent long object. Therefore, it is not necessary to reduce the number of long objects to be bent at the same time, and bending can be performed with high work efficiency.

In addition, the guide pin of the support wall is fitted into the guide hole provided in the end surface of the free end of the center roller, and the support wall fixedly supports the center roller from the axial direction, and the center roller is supported by the beam. I am trying. Therefore, it is possible to obtain a highly rigid structure having a large resistance against the pressing force from the side.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing the basic structure of a bender head, FIG. 2 is a front view of the cylinders of the center and right bender heads as seen from between the cylinder and the support wall, and FIG. 4B is a rear view of the supporting wall of the bender head of FIG. 4, FIGS. 4A and 4B are process diagrams showing final bending in square and short hoop muscles, and FIGS. 5A and 5B are square. And FIG. 6A to FIG. 6D are side views showing the final shape of the short hoop muscle, and FIGS. 6A to 6D are process diagrams before and after the final bending in the long head continuous bending apparatus for the five head and the three head. . 10: Bender head of continuous bending machine for long objects, 10
(B): Center bender head, 10 (C): Right bender head, 12: Frame, 14: Center guide (center roller), 15: Cylinder, 15a: Cylinder bulge (crank arm), 16: Bending roller, 18: Piston, 20: Color, 24: Support wall, 26: Cover, 30: Reinforcing bar (long piece), 32-1,
32-2: Notch.

Claims (1)

[Scope of utility model registration request] 1. A center roller housed in a cylinder and capable of advancing and retracting in the axial direction, and a crank arm that supports a long object and rotates it around a center roller in a vertical plane while sandwiching a long object between the center rollers. And a bending roller for bending the long object upward, and at least three sets of bender heads arranged in parallel with each other in the longitudinal direction of the main frame so as to be separated from each other. In the bending apparatus, a guide hole is formed on the end surface of the free end of the center roller, and a guide pin that can be fitted into this guide hole is provided on the support wall facing the cylinder, and the guide pin is fitted into the guide hole. The support wall fixedly supports the center roller in the axial direction, and the bender head adjacent to the center bender head has notches on both the cylinder surface and the inner surface of the support wall. Only, the vendor head vertical continuous bending device long object of which enables compensate for the increase in total width of the elongated article in the hoop.