JPH0530811Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a device for bending the edge of a thin metal plate to create an edge.
This invention relates to a river-transportable edge-edging device for thin metal sheets, which allows the edge-edging process to be easily performed even when the edge of the thin metal sheet to be edge-edged extends in a curved shape. be.

[Prior art] Edge processing on thin metal sheets has traditionally been carried out by air conditioning duct-related companies, signboard processing companies,
This is done by other sheet metal processing companies. In this case, most of the work was done by hand using an anvil and a hammer.

For example, FIG. 18 shows a thin metal plate 1 that has been subjected to an edge-raising process. A raised edge portion 2 is formed on the thin metal plate 1 over its entire circumference. In addition, even the same edging portion 2 has various contour shapes, for example, a large radiused portion (hereinafter referred to as an outer radiused portion) 3 that bulges outward.
, a small outer radius portion 4 , a large inwardly bulging radius portion (hereinafter referred to as the inner radius portion) 5 , a small inner radius portion 6 , and a straight portion 7 .

[Problems to be solved by the invention] As shown in FIG. 18, when forming the edging portions 2 having various outline shapes by hand processing as described above, anvils of various shapes are used. It was necessary.
In addition, the small radius portions 4 and 6, especially the inner radius portion 6,
is extremely difficult to process using an anvil and a hammer, and the work takes a long time even for experienced workers.

Further, in the conventional manual processing using an anvil and a hammer, it is difficult to obtain a raised edge portion with a low height of about 1 mm, for example.

Therefore, this idea was developed to make it possible to easily and efficiently edge edges not only on straight parts but also on both outer and inner rounded parts, even those with a relatively small radius of curvature. It is an object of the present invention to provide a transportable edge processing device for thin metal sheets.

[Means for Solving the Problems] The edging device for thin metal sheets of this invention is provided so that they can face each other and be separated from each other so as to clamp the edges of the thin metal sheets to be edged. Holds the pair of receiving punch and pad, the processing punch that is placed adjacent to the pair of receiving punch and pad and moves reciprocally in a direction intersecting the surface direction of the thin metal plate, and the pair of receiving punch and pad and processing punch. Equipped with a handle to Here, the receiving punch has a cross-sectional shape that follows the cross-sectional shape of the edging portion of the thin metal sheet, and has a substantially partially cylindrical shape with an axis perpendicular to the surface direction of the thin metal sheet. On the other hand, the working part of the processing punch has a substantially spherical surface, and when the processing punch moves in one direction, the edge of the thin metal plate held by the receiving punch and the pad protruding from the receiving punch. The punches act sequentially from the tip edge of the punch, and the edge is bent to follow the outer surface of the receiving punch to perform the edge-raising process.

[Operations and Effects of the Invention] According to this invention, when performing edge-edging processing, first, the edge of the thin metal plate is clamped by the receiving punch and the pad. Next, by moving the processing punch in one direction, the acting part of the processing punch, which has a substantially spherical surface, acts in order from the tip edge of the edge of the thin metal plate that protrudes from the receiving punch, and Bend the part to follow the outer surface of the receiving punch. As a result, a part of the peripheral edge of the thin metal plate is edged. Therefore, if the above-mentioned edging process is carried out sequentially along the periphery of the thin metal sheet, the entire circumference of the thin metal sheet will be
Alternatively, a raised edge can be applied at a desired location.

As mentioned above, when performing edge processing,
Since the edge of the thin metal sheet is clamped by the receiving punch and pad, the position of the thin metal sheet will not shift as the edge processing progresses, for example, by 1 mm.
It is possible to form a slightly raised edge portion and to process an edge with an accurate height.

In addition, the receiving punch and the processing punch that directly contribute to edge-raising processing are such that the former has a substantially partially cylindrical shape, and the latter has a substantially spherical working part, so it can be used in any direction. Also for the round part,
Furthermore, even if the radius of curvature is relatively small, edge-edging processing can be easily performed. Further, since the working part of the processing punch has a substantially spherical surface, the edging part of the thin metal plate is not damaged, and the edging process can be performed with a clean finish.

Also, according to this invention, instead of using separate tools such as an anvil and a hammer as in the past, it can be handled as an integrated tool that incorporates a receiving punch, pad, and processing punch through the handle. Therefore, it is possible to carry this to the location where the metal sheet is placed and perform edge-edging processing on-site. Therefore, in particular, the complexity of carrying large sheet metal sheets is eliminated.

Furthermore, even if the curvature of each part of the edge of a thin metal sheet to be processed is different, a single edge-edging device can process the entire circumference of such a thin metal sheet. can be applied,
Be efficient. That is, there is no need to replace the anvil depending on the curvature of the peripheral edge of the thin metal plate, as in the conventional case.

[Embodiment] The attached FIGS. 1 to 17 are for explaining an embodiment of this invention.

First, as shown in FIG. 2, the thin metal plate edge processing apparatus 10 of this embodiment is of a portable type and includes a handle 11 that forms a grip for the operator's hand. This edge trimming device 10 is driven by rotational power, and its rotational drive source 1
2 is constructed separately from the main body portion 13 of the processing device 10, so that the burden of gripping the handle 11 is not so great. The rotational drive source 12 is driven by a power source, for example, and includes a motor, a transmission, and the like. The rotational drive provided by the rotational drive source 12 is applied to the body portion 1 via a cable 15 covered by a flexible tube 14.
3. The main body portion 13 includes a handle 11
It has a drive shaft 16 which is rotatably built in and serves as an input for the rotation transmitted via the cable 15.

The main body portion 13 is provided with a head portion 17 connected to the tip of the handle 11, and the main mechanism is housed within the head portion 17.

The detailed structure of the head section 17 is shown in FIG. The head portion 17 includes a housing 18 that extends integrally from the handle 11. The aforementioned drive shaft 1
One end of 6 extends to a head portion 17, to which a gear 19 is fixed. Gear 19 meshes with gear 20 having a larger diameter. Gear 20 is
It is fixed on a crankshaft 21 which is rotatably held relative to the housing 18. In order to facilitate the incorporation of various mechanisms into the housing 18, a portion of the housing 18 is configured with a cover 22 that can be opened and closed, and the above-mentioned crankshaft 21
One end of is held on this lid 22.

An eccentric inner ring 23 is fixed on the crankshaft 21. On the outer peripheral surface of this eccentric inner ring 23,
An eccentric outer ring 24 is arranged. In this way, the circular motion of the crankshaft 21 is applied to the eccentric outer ring 24, causing the eccentric outer ring 24 to reciprocate.

A connecting portion 25 is formed integrally with the eccentric outer ring 24, and an upper end portion of a processing punch 27 is connected to this connecting portion 25 via a pin 26. Processing punch 2
7 is held for reciprocating linear movement within a guide sleeve 28 fixed to the housing 18. Therefore, the rotation of the drive shaft 17 is finally transmitted to the eccentric outer ring 24, and when this moves back and forth, the processing punch 27 moves linearly back and forth in the vertical direction.

Note that a more detailed configuration of the processing punch 27 will be described later.

A pair of a receiving punch 29 and a pad 30 is arranged adjacent to the processing punch 27.

The receiving punch 29 has an overhanging portion 31 at its upper end, and a fixed sleeve 32 that engages with this is attached to the guide sleeve 28, so that the overhanging portion 31 is sandwiched between the fixed sleeve 32 and the guide sleeve 28. As a result, the receiving punch 29 is fixed to the head portion 17.

Note that a more detailed configuration of the receiving punch 29 will be described later.

The pad 30 is held at the lower end of the processing punch 27 so as to slide over a predetermined range on the processing punch 27. Below the pad 30,
A spring 33 is provided, and when the upper end of the spring 33 comes into contact with the lower surface of the pad 30, the pad 30 is biased toward the receiving punch 29.

The processing punch 27 includes an important structure in the cross section shown in FIG. That is, in this part, the action part 34 and the contact surface 35 are formed in the vicinity thereof. In order to show the detailed shape of these parts, cross-sectional views are shown in FIGS. 3 to 6. 3 is an enlarged sectional view taken along the line - of FIG. 1, FIG. 4 is the same line -, FIG. 5 is the same line -, and FIG. 6 is the same line -
FIG. As shown in these drawings, the cross-sectional shape of the processing punch 27 sequentially changes from the portion where the contact surface 35 is formed to the portion where the action portion 34 is formed.

Referring to FIG. 3, abutment surface 35 is preferably formed by a substantially partially cylindrical circumferential surface. The abutment surface 35 is separated from the planar part 36 by a predetermined distance, which distance is related to the height of the edge of the sheet metal, which will be explained later.

As can be seen by referring to FIGS. 4 to 6 in sequence, the operating portion 34 has a substantially spherical shape. Note that this spherical surface does not have to be an exact spherical surface, but may be rounded to an extent that does not damage the thin metal plate to be processed. For example, it may be a spherical surface closer to the circumferential surface of a cylinder or a spherical surface closer to the circumferential surface of a cone. In short, for convenience, a shape that is rounded in both the horizontal and vertical directions will be referred to as a "substantially spherical surface."

The cross-sectional portion shown in FIG. 6 is the portion that comes into contact with the thin metal plate in the final stage of edge-edging processing, and the above-mentioned flat portion 36 is the surface that comes into direct contact with this thin metal plate. The flat part 36 functions to shape the processed edge part, and such a flat part 3
6 is not formed, waves may be formed on the upper edge of the edging portion unless processing is carried out while feeding the head portion 17 at a fairly short pitch.
However, if the width of the flat portion 36 is made too wide, it becomes difficult to process a smaller radiused portion. Therefore, when the flat portion 36 is formed, it is preferable to have a narrower width.

In FIG. 7, only the lower end portion of the receiving punch 29 is shown. Further, FIG. 8 shows the lower surface of the receiving punch 29.

The metal sheet is bent to follow the outer surface of the lower right corner 37 in FIG. Therefore, the receiving punch 39 has a cross-sectional shape at the corner 37 that follows the cross-sectional shape of the edging portion of the thin metal plate. In addition, in order to expect smooth bending without damaging the thin metal plate, it is preferable to round the corners 37 as shown in FIG. 7, but such an advantage is not desirable. If not, the corner 37 does not need to be rounded.
Further, the receiving punch 29 has a partially cylindrical shape with an axis directed in the vertical direction in FIG.
The partial cylindrical circumferential surface 38 extends from the lower end of the receiving punch 29 to a predetermined height. Note that the partial cylindrical circumferential surface 38 does not need to be a part of the exact cylindrical circumferential surface, but may be composed of a part of the circumferential surface of a cylinder whose cross section has a curved outline such as an ellipse, for example. Good too. Therefore, it can be said that the partial cylindrical circumferential surface 38 only needs to be a part of the circumferential surface of a substantially partially cylindrical cylindrical body.

A partial cylindrical peripheral surface 39 is also formed on the opposite side of the partial cylindrical peripheral surface 38, but this is merely shaped to match the inner peripheral surface of the fixed sleeve 32 described above. Therefore, if the means for fixing the receiving punch 29 is changed, the partial cylindrical circumferential surface 39 may be changed to another shape.

A flat portion 40 is also formed on the partial cylindrical peripheral surface 38 . This plane portion 40 is formed by the processing punch 27 described above.
The edging part is sandwiched between the edges and the flat part 36 formed in the edging part. It is preferable that the plane part 40 is also as narrow as possible for the same reason as the above-described plane part 36.

A guide portion 41 is formed extending from the upper end of the region where the partial cylindrical circumferential surface 38 is formed. The lower surface of this guide part 41 is particularly effective, and it positions the thin metal plate by coming into contact with the end edge of the thin metal plate after the edge-edging process. In addition,
As shown by the dotted line in FIG. 8, the guide portion 41 is relatively large so that even if the edging portion 42 of the thin metal plate is curved according to the shape of the edge of the thin metal plate, it can be received by the guide portion 41. It forms a wide underside.

Note that the illustrated guide portion 41 was designed to position the thin metal sheet by coming into contact with the edge of the thin metal sheet after processing, but the guide portion 41 was designed to position the thin metal sheet by contacting the edge of the thin metal sheet after processing. A guide portion may be provided in association with the receiving punch 29 so as to come into contact with the edge of the previous thin metal plate. Also. Alternatively, a score line may be formed in advance on the thin metal plate, and the worker may proceed with the edging work while visually confirming the score line as a reference.

A relatively upper portion of the receiving punch 29 forms a protrusion 44 that slidably fits into the guide groove 43 of the processing punch 27 shown in FIG. Due to the fitting between the protrusion 44 and the guide groove 43, the processing punch 27 is stably operated in a state adjacent to the receiving punch 29.

Next, the operation of the above-mentioned thin metal plate edge processing apparatus 10 will be explained with reference mainly to FIGS. 9 to 17.

First, as shown in FIG. 9 and FIG. 10 showing a cross section taken along the line -, a thin metal plate 45 to be edged is prepared. Such a thin metal plate 45 is a thin metal plate having a thickness of, for example, about 0.1 to 0.6 mm, and its material may be iron, aluminum, copper, or the like. The thin metal plate 45 supports the receiving punch 29 and the pad 3 which are spaced apart from each other.
0, and the contact surface 3 of the processing punch 27
5. In this state,
The edge of the thin metal plate 45 protruding from the receiving punch 29 will later become an edge portion.

Next, the drive shaft 16 shown in FIG. 1 is operated to rotate. Although not shown in the drawings, this operation can be performed by operating a push button switch or a lever switch provided on the handle 11, for example, to supply power to a motor included in the rotational drive source 12. For example, a pin clutch may be provided at the intermediate portion of the cable 16, and the clutch may be operated to transmit rotation from the constantly rotating cable 15 to the clutch. In any case, when the drive shaft 16 is rotated, the rotation is applied to the eccentric inner ring 23, the eccentric outer ring 24 reciprocates, and the processing punch 27 moves up and down.

As the processing punch 27 moves upward, the first
As shown in FIG. 1, the pad 30 moves upward and the thin metal plate 45 is clamped between the pad 30 and the receiving punch 29. This allows the thin metal plate 45 to be firmly positioned.

Further, the processing punch 27 is moved upward. After the pad 30 contacts the thin metal plate 45, the upward movement of the processing punch 27 is prevented by the spring 33.
It progresses against the elasticity (Fig. 1). Therefore,
Between the pad 30 and the receiving punch 29, a stronger clamping force is applied to the thin metal plate 45.

The final stage of the upward movement of the working punch 27 is shown in FIG. Note that FIG. 13 is a sectional view taken along the line - in FIG. 12. During the transition from the state shown in FIG. 11 to the state shown in FIG. 12, the action portion 34 of the processing punch 27 acts on the edge of the thin metal plate 45 protruding from the receiving punch 29 in order from its tip edge,
This edge is bent to follow the outer surface of the receiving punch 29. As a result, at the edge of the thin metal plate 45,
A edging portion 46 is formed. In the final stage of such edge-edging processing, the flat parts 36 and 40 of the processing punch 27 and receiving punch 29 sandwich the edge-raising portion 46 from both sides, thereby contributing to shaping the edge-raising portion 46.

After completing the formation of the edging portion 46 as described above,
The processing punch 27 moves downward. This intermediate stage is shown in FIG. 14. First, the receiving punch 2
Only the processing punch 27 is displaced downward while the thin metal plate 45 is held between the pad 9 and the pad 30, and finally, as shown in FIG. 15, the processing punch 27 is displaced downward. Accordingly, the pad 30 is separated from the receiving punch 29.

Thereafter, the above-described operations are repeated, and the operator, while gripping the handle 11, feeds the edging device 10 along the edge of the thin metal plate 45 at a predetermined pitch. FIGS. 16 and 17 show how edge-edging is carried out after several stages of edge-edging have already been completed.

FIG. 16 shows a stage before the next edge-edging process is to be applied to the edge of the thin metal plate 45 following the already-formed edge-edged portion 46, and this state is as follows:
This corresponds to the state shown in FIG. 10 described above. The edge portion of the thin metal plate 45 before processing is in contact with the contact surface 35 of the processing punch 27, while the edge portion of the thin metal plate 45 after processing is
The edge portion of the edging portion 46 contacts the guide portion 41 of the receiving punch 29 to position the thin metal plate 45, thereby facilitating the work by the operator.

FIG. 17 corresponds to the state shown in FIG. 13 described above, in which a raised edge portion 46 is formed on a new edge of the thin metal plate 45.

As can be seen from FIGS. 16 and 17, the processing device 1
The smaller the pitch at which the action portion of 0 is advanced, the more beautifully finished the edging portion 46 can be formed. However, when such a pitch is made smaller, the efficiency of edge-edging processing decreases. Therefore, such a pitch may be selected depending on the finishing conditions required for the edging portion 46 to be obtained.

Furthermore, when observing the deformation of the material related to the edging portion 46 of the thin metal plate 45 shown in FIGS. It can be considered to be a combined process of 1 and 2 and drawing.

Note that although FIGS. 10, 13, 16, and 17 show the edges of the thin metal plate 45 extending in a straight line, this is simply because the drawings are easy to create. This is the only reason why this edge processing device 10 is more effective when using the thin metal plate 45.
It should be pointed out that this is not a straight edge, but a rounded edge. In particular, as is clear from FIGS. 16 and 17, even if the thin metal plate 45 is formed with a radius of relatively small radius of curvature and in either direction, the processing punch 27 will not come into contact with it. It will be appreciated that the surface 35 and the acting portion 34, as well as the partial cylindrical circumferential surface 38 of the receiving punch 29, are shaped to advantageously avoid interference with such a rounded portion of the thin metal sheet.

If the thickness of the thin metal plate to be edged is changed, for example, if the receiving punch 29 is made replaceable, such thickness adjustment can be easily made. In this embodiment, by removing the fixing sleeve 32,
The receiving punch 29 is configured to be easily replaceable. Note that the processing punch 27 may be replaced in place of the receiving punch 29, or both may be replaced.

Further, adjustment of the rising height of the edging portion obtained by the edging process can also be handled by replacing the receiving punch 29 and/or the processing punch 27, as in the case described above. However, the rising dimension in particular can be sufficiently adjusted by the operator himself depending on how deep the edge of the thin metal plate is received between the receiving punch 29 and the pad 30.

Although this invention has been described above in connection with the illustrated embodiment, several modifications can be made within the scope of this invention.

For example, in the illustrated embodiment described above, the edging portion 46 is formed to rise upward from the thin metal plate 45. By doing this, the worker can proceed with the work while observing the edging portion 46 with his own eyes, which has the advantage of making the work easy. If this is not desired, the structure may be changed so that the edging portion rises below the thin metal plate.

Further, in the illustrated embodiment, the processing punch 27 is configured to move in a reciprocating straight line, but it may be modified to perform a reciprocating rotational movement around a certain pivot point.

Further, in the illustrated embodiment, a rotary drive source such as a motor is used as the drive source, and a so-called crank mechanism converts circular motion into reciprocating motion. Good too. Furthermore, hydraulic pressure, pneumatic pressure, or the like may be used as the driving source. In this case, in addition to a cylinder that moves linearly, it is also possible to use a cylinder that provides rotational movement. Furthermore, the processing punch may be driven by manual operation by the operator himself/herself. For example, in relation to FIG. 2, a lever is provided in line with the handle 11, a machining punch is connected to this lever, and the operator himself/herself grips both the handle 11 and the lever to operate the lever. The processing punch may be reciprocated by rotating the punch.

Furthermore, as shown in FIG.
Although the driving source is configured separately from the main body portion 13, the motor may be attached to the handle 11, for example.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a main body portion 13 of an edge processing device for a thin metal plate according to an embodiment of the present invention. FIG. 2 is a partially sectional front view showing an overall outline of the edge-edging processing apparatus 10 for a thin metal plate, which includes the main body portion 13 shown in FIG. 1. FIG. FIG. 3 is an enlarged sectional view of the processing punch 27 taken along the line - in FIG. 1. FIG. 4 is an enlarged sectional view of the processing punch 27 taken along the line - in FIG. 1. FIG. 5 is an enlarged sectional view of the processing punch 27 taken along the line - in FIG. 1. FIG. 6 is an enlarged sectional view of the processing punch 27 taken along the line - in FIG. 1. Figure 7 shows the receiving punch 2.
9 is an enlarged front view showing the lower end portion of FIG. Figure 8 shows
FIG. 3 is an enlarged bottom view of the receiving punch 29. FIG. FIG. 9 is an enlarged sectional view showing the first stage of operation, and FIG. 10 is a sectional view taken along the line - in FIG. 1st
FIG. 1 is an enlarged sectional view showing the second stage of operation. FIG. 12 is an enlarged sectional view showing the third stage of operation, and FIG. 13 is a sectional view taken along the line - in FIG. 12. FIG. 14 is an enlarged sectional view showing the fourth stage of operation. Figure 15 shows the fifth operation.
It is an enlarged sectional view showing a stage. FIGS. 16 and 17 are cross-sectional views corresponding to FIGS. 10 and 13, respectively, and show the state after the edge-raising process has progressed to a certain extent. 1st
FIG. 8 is a perspective view showing a thin metal plate 1 as an example to which this invention is applied. In the figure, 10 is a metal sheet edge processing device, 11 is a handle, 12 is a rotational drive source, 16 is a drive shaft, 19 and 20 are gears, 21 is a crankshaft, 23 is an eccentric inner ring, 24 is an eccentric outer ring,
25 is a connecting part, 26 is a pin, 27 is a processing punch,
29 is a receiving punch, 30 is a pad, 33 is a spring, 3
4 is an action part, 35 is a contact surface, 36 is a flat part, 38
40 is a partial cylindrical circumferential surface, 40 is a plane portion, 41 is a guide portion, 42 is a edging portion, 45 is a thin metal plate, and 46 is an edging portion.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A pair of a receiving punch and a pad, which are provided facing each other so as to be able to approach and separate so as to clamp the edge of a thin metal plate to be edge-edged, the receiving punch; and a processing punch that is disposed adjacent to the pair of the pad and the pad and that reciprocates in a direction intersecting the surface direction of the thin metal sheet, and a handle that holds the pair of the receiving punch and the pad and the processing punch, The receiving punch has a cross-sectional shape that follows the cross-sectional shape of the edging portion of the thin metal sheet, and has a substantially partially cylindrical shape with an axis perpendicular to the surface direction of the thin metal sheet, and the processing is performed as described above. The acting part of the punch has a substantially spherical surface, and when the processing punch moves in one direction, the edge of the thin metal plate clamped by the receiving punch and the pad, which protrudes from the receiving punch, is A portable edge-edging device for a thin metal sheet, which works sequentially from the leading edge and bends the edge to follow the outer surface of the receiving punch to perform the edge-edging process. (2) The edge-edging processing device for a thin metal sheet according to claim 1, wherein the processing punch moves in a reciprocating straight line. (3) The edge-edging device for a thin metal sheet according to claim 2, wherein the processing punch is connected to a rotational drive source via a crank mechanism. (4) The pad is held in a state where it can slide on the processing punch and is biased by a spring in a direction approaching the receiving punch, and the acting part of the processing punch acts on the edge of the thin metal plate. 3. The edge-edging device for a thin metal sheet according to claim 2, wherein the thin metal sheet is first clamped between the receiving punch and the receiving punch. (5) The processing punch includes, near the action part,
For a thin metal plate according to any one of claims 1 to 4 of the utility model registration claim, in which a contact surface for positioning the thin metal plate by contacting the edge of the thin metal plate before edge processing is formed. Edging processing equipment. (6) The receiving punch is provided with a guide portion that abuts against the edge of the thin metal sheet after edge processing and positions the thin metal sheet, as set forth in claims 1 to 5 of the scope of utility model registration claims. The edge processing device for a thin metal plate according to any one of the above. (7) The surfaces of both the processing punch and the receiving punch that come into contact with the thin metal plate in the final stage of edge-edging processing are narrow flat surfaces, as set forth in claims 1 to 6 of the utility model registration claims. The edge processing device for a thin metal plate according to any one of the above.