JPH0327819A - Bender - Google Patents

Abstract

PURPOSE:To bend a work in the prescribed curvature by placing a holding roller at the center, supporting the work through a bending medium at 2-points on the conveyer side and making the bender composed of the above medium as load bearings to receive the bending load from the roller. CONSTITUTION:The conveyer 17 horizontally receives one side part 14 of the work C at the loosening side of the bending medium portion directly or indirectly and carrys the work. The holding roller 18 to give the bending load is provided facing this conveyor 17 and receives the work with the outer peripheral groove in which the other sides of the work is inserted closely. This holding roller 18 is placed at the center, the work is supported at the position of 2-points on the above conveyor side through the bending medium portion and one or plural load bearings 19, 20 receive the bending load from the above roller, these three constituting elements are provided. In such a way, if the side part of the work is worked with the bending load in the width direction from the above roller, the strain i.e., flow, recession and crack, etc., are hardly generated and the ending work in the prescribed curvature is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention provides a method for handling a flat workpiece, such as a chalk tray on a blackboard, while keeping the surface of the workpiece flat.
The present invention relates to a bender that can be suitably used when bending a side part, especially a barbed side part, to a required curvature.

(Problems to be Solved by American Technology and Invention) Recent large blackboards have curved writing surfaces in consideration of ease of viewing from both sides. Therefore, it is necessary to attach a chalk holder (made of aluminum alloy) that is curved so as to follow the writing surface of the board. In the past, bending of such a choke receiver was carried out, for example, by the method shown in FIG. In other words, 1 in the figure is a tool for bending, in which a mold 2 is fixed in a sandwich-like manner from both sides by a pair of guides [3]. A choke receiver C is inserted into this guard 1, and one end thereof is clamped together with the mold 2 by a clamp 4.

Then, hold the free end, which is the other end of the choke receiver C, and press it down as it is, bending the half so that it follows the mold 2. Next, the choke receiver C is reversed, that is, the other free end is fixed with the clamp 4, and the fixed f
Using the one end, which was 1ll, as a free end, the same operation as described above was performed to further bend the half to give the desired curvature.

However, such manual bending process not only has low working efficiency but also has the disadvantage of lacking stability in accuracy.

However, there has been a bending roll machine that passes a plate material between three upper and lower rolls and bends it to a desired curvature. However, although a bending roll machine is suitable for bending a workpiece such as a flat plate into a cylindrical or conical shape, it keeps the plate surface flat while bending the sides, especially the curved sides. It was not suitable for cases where bending was to be performed with a required curvature.

That is, in a bending roll machine, each roll is a workpiece II.
Since there is a point contact with the I1 part, there is a problem in that the workpiece is damaged during bending work where a large load is applied.

This invention was devised to eliminate the above-mentioned drawbacks of conventional methods. The purpose of this is that it can be suitably used for bending the sides of a flat workpiece, especially the side parts of the barb, to a required curvature while keeping the plate surface flat. Provided by vendors.

(Means for Solving the Problem) In order to achieve the above object, the bender according to the present invention (a) indirectly or directly bends one side of the workpiece on the slack side of the bending mediating joint. A conveyor (b '') that receives the workpiece on a flat surface and conveys the workpiece.A holding roller (C) that faces the conveyor and receives the workpiece through an outer circumferential groove into which the other side of the workpiece fits snugly and applies a bending load. When this presser roller is opened halfway, it supports the workpiece via its bending joints at two positions on the conveyor side, and there are three structures of one or more load receivers that receive the bending load caused by the roller. element.

However, a conveyor may be used instead of the pressing roller. However, this younger brother 2 conveyor applies a bending load by indirectly or directly supporting the other side of the work piece with a bending joint supported by a pusher placed between the shafts. , the axis rWI distance is overwhelmingly shorter than that of the PIS1 conveyor that conveys the workpiece.

An example of a conveyor is a chain conveyor that continuously supports a large number of metal receiving plates.

(Function) The input workpiece is conveyed to the holding roller (f52 conveyor) side by the conveyor (first conveyor). After passing the holding roller (second conveyor) and supported at two points by the load receiver, the roller (second conveyor)
It is bent to the required curvature by receiving the bending load from the conveyor.

(Embodiment) Hereinafter, an embodiment of the vendor according to the present invention will be described based on FIGS. 1 to 6. The Bengoo shown in this embodiment is a device suitable for bending the sides, especially the curved sides, of a blackboard to a desired curvature while keeping the board surface flat. has been made into

That is, numeral 11 in the figure indicates the entire bender, and casters 13 are attached to the base 12 of the bender, making it movable. On both sides of the main body on the base 12, there are processing sections that process the chalk receiver C of the blackboard, which is the workpiece, with the required curvature, and on the table in front of these processing sections, A work input section for inserting the work is provided.

The choke receiver C is made of an aluminum alloy, and consists of a flat plate having an asymmetric cross-section, with the other barb side gA portion 15 being thicker than the one barb side portion 14. Therefore, the workpiece input section is configured such that the irregularly shaped chalk receiver C can be inserted stably by standing in the direction of the inside of the board.
Two guide plates 16 are provided. That is, as clearly shown in Figure 3, the two side plates 16 are erected with a required gap that allows the choke receiver C to be inserted, and the two side plates 16 are erected with a required gap that allows the choke receiver C to be inserted. It has a cross-sectional shape that allows it to more snugly support 15 from both sides.

Next, a conveyor that conveys the loaded chalk receiver C toward the processing section is located below the depth of the work input section. The conveyor is capable of transporting the choke receiver C by receiving it on its surface, and in this embodiment, a chain conveyor 17 that continuously supports a large number of metal receiving plates P is provided. This chain conveyor 1
7 may be replaced with a belt conveyor provided with a metal flat belt.

As clearly shown in FIG. 5, the chain conveyor 17 is stretched so that the loose side is at the top. Therefore, one side 14 of the choke receiver C is flat-supported and conveyed via a metal receiving plate P supported by a roller chain (bending agent joint) on the slack side, more specifically, on the slack side. It has become.

When the conveyor is the above-described belt conveyor, the chalk receiver C is directly supported flat on the slack side of the metal flat belt, which is the bending mediating joint, for conveyance.

On the chain conveyor 17 side, that is, between its two axes, a press roller 18, which will be described later, is placed at the upper center and symmetrically located on the left and right sides! 51 and a second two load receptors 19.20 are provided. These first and second younger load receivers 19 and 20 support one side 14 of the choke receiver C at two points via a roller chain running on the upper side S thereof, and also support the presser roller 18. It can absorb the bending load due to tjS6
As clearly shown in the figure, the upper side S of the younger brother 1 load receiver 19 (first load receiver 20) has two slopes, a1 and a2. a1 is the inclination when the choke receiver C moves up and down before and after the presser roller 18,
In the embodiment, the angle is set at about 5 degrees. and,
α2 is an inclination for imparting a required curvature to the choke receiver C, and is set at an angle of about 2° in the embodiment.

The greater the inclination of a2, the more the choke receiver C curves. Of course, the upper side portion S may be formed into a curved surface. Furthermore, the two load receivers 19 and 20 may be integrally shaped and integrated into one, and the upper side thereof may be a curved surface composed of two circular arcs. And these two load receivers 19.20 are
A portion of the back (not shown) is inserted into a hole 21 extending across the bender body, and is fixed by tightening a hexagonal socket bolt 22 with double defeat.

Next, at the upper center of the chain conveyor 17, a pressing roller 18, which is rotationally driven by the same drive source as the conveyor 17, is opposed. As shown in FIG. 4, the pressing roller 18 is provided with an outer circumferential groove 23 into which the other side 15 of the choke receiver C is perfectly fitted. Bending load is applied in the direction of the plate. Further, a slide plate 25 is attached and fixed behind the pressing roller 18 via a connecting sleeve 24 which is inserted through the pressing roller 18. Further, on both sides of the slide plate 25, there are vertical grooves (not shown) that fit into idle rails 26 provided on the bender body, and the slide plate 25 can be moved up and down along the rails 26. . By going up and rotating the adjustment screw 27 screwed into the top of this slide Jfi 25,
The slide plate 25 is moved up and down, and the pressing roller 18
The mounting position can be adjusted up and down. If the mounting position of the presser roller 1 is lowered, the degree of curving of the workpiece will be increased, and conversely, if it is raised, the degree of curving of the workpiece will be decreased.

Note that a compression spring 28 is provided at the bottom of the slide plate 25 to bias the slide plate 25 upward.
To correct the loosening of the screw of the adjustment knob 27.

Between the chain conveyor 17 and the holding roller 18, there is a mechanism so that the choke receiver C, which is the workpiece, can be stably held and conveyed before and after the bending process.
A guide member 29, 30.31 is provided, 32.33
is an attachment sleeve support plate for fixing these guide members 29 to 31 to the bender main body.

Furthermore, depending on the shape of the workpiece, especially a workpiece with an asymmetrical cross-sectional shape such as the choke receiver C shown in this embodiment, there is a risk that twisting or bending may occur in the mask during bending. To correct such distortion,
After the bending process is carried out on the press roller 18, it is desirable to apply tension with a roller-like object from the side. In the embodiment, a freely rotatable tension roller 34 is attached to the upper end of the attachment auxiliary plate 33 behind the presser roller 18, that is, on the side opposite to the work input section.

The roller 34 needs to be positioned at such a height that it can just hit the upper end of the choke receiver C being sent out.

Alternatively, each of the id surfaces of the id members 29 to 31 may be warped in an arc shape along the handle direction, thereby giving a reverse warp to the workpiece and correcting distortion such as twisting.

Next, the operation of the adhesive according to the present invention having the above structure will be explained.

First, the chalk receiver C is inserted into the workpiece input section with the chalk receiver C erected in the direction of the board, that is, with one thin side 14 facing down and the other thick side 15 facing up. The rotating chain conveyor 17 receives one side 14 of the choke receiver C on its surface by a receiving plate P supported by a roller chain, and conveys the choke receiver C to the processing side. At this time, the chain conveyor 17 receives the choke receiver C by the loose roller chain. Therefore, this choke receiver C is conveyed in a downward direction along the upper side S of the first load receiver 19, and passes under the press roller 18. Then, after passing under the presser roller 18, it turns upward, and rises along the upper side S of the second load receiver 20. Therefore, the choke receiver C is supported at two points by the load receivers 19 and 20, and receives the bending load of the presser a-ra 18 located at the upper center thereof. As already mentioned,
One side 14 of the choke receiver C is a flat receiver with a large contact area, so there is no concentration of load. *In addition, the other side portion 15 is not easily deformed by fitting snugly into the outer circumferential groove of the pressing roller 18. Therefore, even if subjected to a bending load, scratches, dents, cracks, etc. will occur on both sides 14.15 of the choke receiver C.
Easily processed into curved shapes. Further, twisting of the plate surface due to bending is corrected by the tension roller 34 hitting the plate.

However, at the start and end of the bending process, some distortion may occur at the leading end and rear end of the choke receiver C. Such distortion can be eliminated by employing the following method and structure.

(A) In advance, attach the choke receiver C to both load receivers 19.
20 to a position where it is supported at two points, and then the press roller 18 at the upper center lowers to apply a bending load.
Once the required curvature has been imparted, the product is transported out.

(B) The receiving plate P of the roller chain is attached so that it can freely tilt around the roller shaft as a fulcrum, so that it can freely correspond to the inclination of the choke receiver C.

(C)\Chake catch C on the roller chain catch plate P
A guide portion such as a groove or a support is provided to hold one side 14 of the device.

Note that, of course, the work that can be bent by the bender according to the present invention is not limited to the choke receiver shown in the embodiment. It can be suitably used for bending various flat workpieces, and can also be used for bending objects that were previously bent using conventional bending rolls, such as round azaleas, square bars, round pipes, and square pipes. The types and shapes of the N-elephant workpieces are not particularly limited. Moreover, the vehicle according to the present invention can also be implemented in the following manner.

(1) Instead of the holding roller 18, the other side of the workpiece may be received by a conveyor such as a chain conveyor that continuously supports a large number of receiving plates P, or a belt conveyor equipped with a metal flat belt. good. for example,
For a thin plate-like workpiece, it is desirable that both sides of the workpiece be received by flat supports with a large contact area.

That is, as shown in FIG. 7, the conveyor (e.g., chain conveyor 18a) that replaces the presser roller 18 has an overwhelmingly shorter distance between its two axes than the opposing conveyor (e.g., chain conveyor 17), and Between the axes,
A pusher W that applies a bending load to a workpiece (for example, a choke receiver C) is provided.The pusher W is supported by this pusher W, and a bending mediating joint (for example, a large number of The other side of the workpiece is supported flatly by a roller chain supporting a receiving plate.This conveyor (for example, chain conveyor 18a) is connected to a matching conveyor (for example, chain conveyor 17). , cargo receivers 19, 20, etc., employ the same structure as in the embodiment described above.

(2) In the illustrated embodiment, the load receivers 19 and 20 are fixed to the bender body by bolting, but instead of bolting, they are supported at one point by a method such as pinning, and the fulcrum is the center point. It may also be possible to freely change the inclination.

By adopting such a structure, it is possible to deal with works having various curvatures, thereby providing versatility.

(3) The vertical relationship between the presser roller 218 and the chain conveyor 17 may be set in the opposite direction to the illustrated embodiment. , it may be set horizontally.

(4) In the illustrated embodiment, there are two . Although we provided a processing section, it is also possible to have one, or three
There may be more than one.

(Effects of the Invention) The present invention is constructed as described above, and provides the following effects.

In the bender according to the first aspect, one side of the workpiece is flatly supported by a conveyor, and the other side is received by a roller having an outer circumferential groove that matches the shape of the workpiece. Therefore, even if a bending load is applied to the side of the workpiece in the direction of the inside of the plate, this roller prevents distortions such as scratches, dents, and cracks from occurring, and maintains the plate surface flat while maintaining the required curvature. Can be bent.

In the bender according to the second aspect of the present invention, both sides of the workpiece are flatly received by the conveyor. Therefore, both sides are suitable for bending a thin plate-like workpiece with no thickness.

In the bender according to claim 3, since a chain conveyor in which a large number of metal receiving plates are continuously supported is used as the conveyor for flatly receiving the workpiece, there is little fear of wear and the like and the product is excellent in durability.

[Brief explanation of drawings]

Fig. 1 is a front view of a preparatory layer according to the present invention, Fig. 2 is a side view thereof, Fig. 3 is a perspective view of the workpiece input section, Fig. 4 is an enlarged layer sectional view taken along line A-A in Fig. Figure 5 is a schematic diagram explaining the mechanism of the bender, younger Figure 6 is a front view of the load receiver, and Figure 7 is a schematic diagram explaining the mechanism of the bender.
The figure corresponds to the ttS5 diagram in another embodiment,
FIG. 8 is a diagram illustrating an example of a method of processing junmai. 14...One side of the work 15...The other side of the work 17...Chain conveyor 18...Press roller 18a...Chain conveyor 19.20...Load receiver 23...Outer circumferential groove P of the press roller・・Metal receiving plate

Claims (1)

[Scope of Claims] 1) A conveyor that conveys the workpiece by indirectly or directly supporting one side of the workpiece on the loose side of the bending mediating joint; A press roller that receives the work through an outer circumferential groove into which the other side of the work is tightly fitted and applies a bending load; A bender comprising one or more load receivers that support a workpiece through joints and receive bending loads from the rollers. 2) a first conveyor that conveys the workpiece by indirectly or directly supporting one side of the workpiece on the loose side of the bending mediating joint; A second conveyor with a short distance between the shafts that applies a bending load by indirectly or directly supporting the other side of the work on a plane with a bending joint supported by a pusher placed between the shafts; , with this second conveyor in the middle, one or more load receivers that support the work via the bending joints at two positions on the side of the first conveyor, and that receive the bending load caused by the second conveyor. A vendor consisting of. 3) The bender according to claim 1 or 2, wherein the conveyor is a chain conveyor that continuously supports a large number of metal receiving plates.