JP6046304B1 - Curved plywood processing equipment - Google Patents

Abstract

A processing device for curved plywood for accurately cutting the ends of various curved plywoods having different radii of curvature used as concrete molds or the like with a predetermined dimension. A table 7 that moves on a straight rail 6 laid on a base 2 and a rod 17 that is installed above the table 7 via a frame 12 fixed to the table 7 and expands and contracts in the vertical direction. An air cylinder 16 provided, a support plate 18 provided with an arc portion processed to a curvature radius corresponding to the curvature of the curved plywood W that is a workpiece, and a pair of circular saws 26 disposed on both outer sides of the base 2. 29, and the support plate 18 is erected on the table 7 with the arc portion 19 facing upward, and then the curved plywood W is placed on the arc portion 19, and the curved plywood W is mounted by the rod 17 of the air cylinder 16. In a state of being pressed downward, the table 7 is moved toward the circular saws 26 and 29, whereby both side edges of the curved plywood W are simultaneously cut. [Selection] Figure 2

Description

  The present invention relates to a curved plywood processing apparatus used in a construction civil engineering site.

  When building a structure made of reinforced concrete at a construction site, a concrete form panel made of wood, metal, FRP or the like is often used. Many high-design structures such as art museums, museums, and stadiums have curved external shapes, but when constructing these structures, the radius of curvature (bending) is adjusted to the shape of the outer surface. Various curved plywood (also referred to as “bending plywood”) with different thicknesses are used as concrete molds. Also, at the civil engineering site, when building an arched dam or a cylindrical pier, various curved plywoods with different curvature radii are used as concrete molds in accordance with the outer surface shape.

  The plywood is formed by applying an adhesive to a plurality of single plates, bonding them together, and applying pressure to join them. In this forming process, a curved plywood having a desired radius of curvature can be formed by placing a plate material between male and female molds having a desired radius of curvature and pressing the adhesive at a high temperature to dry the adhesive. For example, a rectangular veneer plate of 910 mm × 1820 mm (thickness is 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 9 mm, 12 mm, etc.) is used as a single plate, and about 4 pieces of 4 mm thick veneer plates are laminated. A curved plywood with a thickness of 12 mm is formed. Note that, as the curved plywood has a smaller curvature, it is difficult to form a plywood having a desired radius of curvature unless a thin plywood is used. Therefore, a veneer having an arbitrary thickness is selected according to the size of the curvature radius.

  A concrete formwork is used by assembling a plurality of formwork panels into a building civil engineering site and connecting them to each other at the site to form a desired formwork shape. The assembly work of these formwork panels is made by bringing the side surfaces of each formwork panel into contact with each other without any gaps, and then, for example, attaching piers provided at both ends of each formwork panel to each other with hardware such as nails or screws. To be connected to each other. As a method of forming curved formwork at the site, there are cases where a plurality of formwork panels that have been pre-processed to a desired radius of curvature in the factory are used by connecting them to the site, and a flat formwork panel is used on site. In some cases, after being carried in, it is transformed into a desired radius of curvature at the site. As an example of the latter, Patent Document 1 discloses a technique related to a method of installing a curved formwork having an arbitrary curvature in the field, but this technique makes contact with the sides of each formwork panel abutting each other without a gap. After that, they are connected to each other using tightening metal fittings, and by turning the turnbuckle laid between each formwork panel, the formwork panel is bent to achieve a curved formwork of any curvature It is.

JP-A-6-212787

  If the finishing accuracy of the side surfaces of the formwork panels, which are the connecting parts of the formwork panels, is poor, a gap will be created in the connecting part between the formwork panels, and the concrete will leak out of the gaps, etc. Etc.). Therefore, it is necessary to finish the edges on both sides (hereinafter referred to as “both side edges”) of the formwork panel to be a connecting portion linearly and smoothly with high accuracy so as to be connected without a gap.

  By the way, a plywood is formed by laminating a plurality of single plates (plywood). In the process of applying an adhesive to each single plate and bonding them together and applying pressure, Due to variations in dimensional accuracy of the (each layer), positional misalignment when pasting each other, or the like, unevenness usually occurs at the end portions. In particular, for curved plywood curved in an arc shape, since the arc length on the outer layer side and the arc length on the inner layer side are different, unevenness tends to occur on each edge of the curved plywood, so curved plywood after press molding When using as a formwork panel, it is necessary to finish the edge linearly and smoothly with high accuracy.

  In this regard, the technique disclosed in Patent Document 1 does not consider the problem of a gap generated in a connection portion between the formwork panels when the formwork panels are bent. In addition, an attempt is made to mechanically bend a plywood formwork panel formed by laminating a plurality of plywood plates using a fastening metal fitting such as a turnbuckle at a construction civil engineering site as in the technique disclosed in Patent Document 1. In this case, it is difficult to form a beautiful aspect because it is originally a flat veneer plate. If you try to forcibly bend it, the arc lengths on the inner layer side and the outer layer side will be different, so the adhesive that joins each veneer plate Cannot be handled when the radius of curvature is small (the curve is tight).

  When a curved plywood is used as a concrete mold, it is conceivable to finish an end portion that becomes a connecting portion of the curved plywood with a panel saw using a circular saw as a cutting means. In this panel saw, the bottom of the panel (face plate) is placed on a horizontal ruler, the back of the panel is leaned against a table surface standing at a predetermined inclination angle, the panel is clamped to the table surface, and then a circular saw is Use it to cut.

  However, when finishing the ends of curved plywood using a panel saw, each edge of the curved plywood has uneven irregularities and the plywood itself is curved, so the bottom surface of the curved plywood Is unstable and easy to wobble when placed on a horizontal ruler. Therefore, it is extremely difficult to place the desired position and angle on the table surface, so it is difficult to accurately cut the desired position, or until the curved plywood is placed at the desired position and angle. There is a problem that it takes a considerable amount of time and work efficiency is poor. In addition, panel saws usually use a single circular saw to cut the panel one side at a time, so if there are large irregularities on each end, such as curved plywood, each end is cut in parallel. There is also a problem that it is difficult to do.

  For example, if the lower edge is placed on a horizontal ruler to process the right edge of the curved plywood, it is difficult to stand the curved ply vertically because of the unevenness of the lower edge. In some situations, the right edge may be cut. In addition, when the curved plywood is turned upside down and the upper edge is placed on a horizontal ruler to cut the left edge, it is difficult to stand the curved ply vertically due to the unevenness of the upper edge. The left side edge may be cut in an inclined state, and as a result, it is difficult to cut the right side edge and the left side edge, which are the connecting portion of the formwork, in parallel. Even if such a curved plywood is brought into the field as a formwork panel and assembled, a gap is generated at the connecting portion between the formwork panels, which adversely affects the finishing accuracy (smoothness, etc.) of the concrete surface.

  The present invention has been made in view of the above-described problems, and is a curved plywood processing apparatus for accurately cutting the ends of various curved plywoods having different curvature radii used as concrete molds or the like with predetermined dimensions. The purpose is to provide.

  The curved plywood cutting device according to the present invention includes a table that moves on a straight rail laid on a base, and a rod that is installed above the table via a frame fixed to the table and expands and contracts in the vertical direction. Pressing means, a support plate having an arc portion processed to a radius of curvature corresponding to the curvature of a curved plywood that is a workpiece, and a pair of circular saws disposed on both outer sides of the base After the support plate is erected on the table with the arc portion facing upward, the curved plywood is placed on the arc portion, and the curved plywood is pressed downward by the rod. By moving toward the circular saw, both side edges of the curved plywood are simultaneously cut.

  In the cutting apparatus for curved plywood of the present invention, preferably, each of the pair of circular saw blades may be arranged toward the center of curvature of the curved plywood placed on the support plate.

  The cutting device for curved plywood according to the present invention is preferably a fixed portion fixed on the table, a sliding portion slidably disposed on the table, and the sliding portion facing the fixed portion. A supporting plate holding means having a spring member that presses and presses the supporting plate on the table by sandwiching the supporting plate between the fixed portion and the sliding portion and biasing the supporting plate by the spring member. You may make it stand upright.

  In the cutting apparatus for curved plywood according to the present invention, preferably, a plurality of the supporting plate holding means are arranged at regular intervals along the extending direction of the linear rail, and according to the size of the curved plywood that is a workpiece. Further, a plurality of support plates may be sandwiched between arbitrary support plate holding means, and may be erected on the table, and the curved plywood may be supported by the plurality of support plates.

  In the cutting apparatus for curved plywood according to the present invention, preferably, a long plywood presser is attached to the lower end of the rod in the extending direction of the linear rail, and the curved plywood as a workpiece is pressed through the plywood presser. You may do it.

  ADVANTAGE OF THE INVENTION According to this invention, the edge part of curved plywood used as a concrete formwork etc., for example, a both-sides edge, can be cut | disconnected with a predetermined dimension accurately. In particular, by using a pair of circular saws arranged one by one on both outer sides of the base, both side edges of the curved plywood can be cut simultaneously, so both side edges can be cut in parallel. The time required for finishing can be shortened. When the curved plywood cut according to the present invention is brought into the construction and civil engineering field and used as a formwork panel, the side edges that become the connecting parts of the formwork panel are finished in parallel and smoothly with high precision. There is no gap in the connection between the frame panels.

  Further, according to the present invention, a support plate having an arc portion processed into a curvature radius corresponding to the curvature of the curved plywood can be appropriately selected and used according to the curvature of the curved plywood. It can be used as a processing device for various curved plywood having different thicknesses.

In the processing apparatus of the curved plywood which is one embodiment of this invention, it is the side view which showed typically the step which mounted the curved plywood which is a workpiece, and pressed it with the press means. In the processing apparatus for curved plywood according to one embodiment of the present invention, it is a front view schematically showing the stage where the curved plywood that is the workpiece is placed and pressed by the pressing means, and the position of the cutting edge of the circular saw Also schematically shown are means for adjusting the angle. It is the perspective view which showed an example of the support plate typically, (a) is a semicircle thing, (b) is a reverse U-shaped thing. It is the perspective view which showed typically an example of the support plate holding means. It is the perspective view which showed typically an example of the curved surface plywood which is a to-be-processed object. In the processing apparatus of the curved plywood which is one embodiment of this invention, it is the side view which showed typically the step before mounting a support plate. In the processing apparatus of the curved plywood which is one embodiment of this invention, it is the front view which showed typically the step before mounting a support plate. In the processing apparatus of the curved plywood which is one embodiment of this invention, it is the side view which showed typically the step after mounting a support plate. In the processing apparatus of the curved plywood which is one embodiment of this invention, it is the front view which showed typically the step after mounting a support plate. In the processing apparatus of curved plywood which is one embodiment of this invention, it is the side view which showed typically the start step which cut | disconnects the edge of a curved plywood by moving a table toward a circular saw. In the processing apparatus of curved plywood which is one embodiment of this invention, it is the side view which showed typically the completion | finish step which cut | disconnects the edge of a curved plywood.

  Hereinafter, a curved plywood processing apparatus 1 according to an embodiment of the present invention will be described. As shown in FIGS. 1 and 2, the curved plywood processing apparatus 1 according to the present invention includes a table 7 that moves on a straight rail 6 laid on a base 2 and a frame 12 that is fixed to the table 7. Via the air cylinder 16 as a pressing means that is provided above the table 7 and includes a rod 17 that expands and contracts in the vertical direction, and a circular arc portion 19 that is machined to a curvature radius corresponding to the curvature of the curved plywood W that is a workpiece. And a support plate 18 erected on the table 7 with the arc portion 19 facing upward, and a pair of circular saws 26 and 29 arranged one by one on both outer sides of the base 2.

  The base 2 is installed and fixed on a floor surface of a factory or the like, and supports the rail 6, the table 7, and the like at a predetermined height position. In the present embodiment, the base 2 includes a base frame 3 that is installed and fixed on the floor surface, a plurality of support columns 4 that are installed and fixed on the base frame 3, and supported and fixed by the support columns 4 from the ground. And a flat plate-like stage 5 installed substantially horizontally at a height of about 1 meter. Two straight rails 6 are laid in parallel on the stage 5 along the longitudinal direction of the stage 5 (see FIG. 2). The space below the stage 5 can be used as a support plate 18 storage space.

  The table 7 includes wheels 8 that roll on the straight rail 6, and can move on the straight rail 6 so as to freely move back and forth. As a drive mechanism for running the table 7, the curved plywood processing device 1 includes a pair of sprockets 9 disposed at both ends of a stage 5, an endless wire 10 spanned between these sprockets 9, and a speed reducer. And a reversible electric motor (not shown) connected to one of the sprockets. A connecting portion 11 attached to the wire 10 is fixed to the bottom of the table 7. Then, by operating the electric motor and winding the wire 10, the table 7 can be moved forward and backward through the connecting portion 11. As a drive mechanism for running the table 7, various table transport means such as a chain mechanism, a rack and pinion mechanism, and a feed screw can be used.

  The frame 12 is a member for disposing the air cylinder 16 as a pressing means above the table 7. In the present embodiment, the frame 12 is configured in a gate shape in a side view (see FIG. 1), and two columns 13 and 14 that are erected and fixed to the front and rear ends of the table 7 respectively (see FIG. 2). And a beam 15 spanned between the front end support column 13 and the rear end support column 14. As shown in FIG. 2, the two support columns 13 on the front end side are erected and fixed at predetermined intervals in the width direction of the linear rail 6 (left and right direction in FIG. 2). A plywood presser 21 is disposed. Similarly, two columns 14 on the rear end side are erected and fixed at a predetermined interval in the width direction of the linear rail 6, and a plywood presser 21 is disposed between these columns 14. The plywood presser 21 is movable up and down without being fitted into each of the front end support column 13 and the rear end support column 14.

  An air cylinder 16 is disposed above the table 7 via the frame 12. In the present embodiment, the air cylinder 16 is mounted downward at a constant interval on the bottom side of the beam 15. The air cylinder 16 includes a rod 17 that expands and contracts in the vertical direction, and a pressing force can be applied downward by lowering the rod 17. Note that the rod 17 can be extended and contracted by an operator by a control device (not shown) that is generally used. The pressing means is not limited to the air cylinder 16 and can be widely used as long as it is a lifting means having a power source capable of moving a hydraulic cylinder and other telescopic rods up and down.

  FIG. 3 is a schematic view showing an example of a support plate. As shown in FIG. 3A, the support plate 18 includes an arc portion 19 processed to have a radius of curvature corresponding to the curvature of the curved plywood W, and a sandwiching portion 20 placed on the table 7. It is a semicircular plate (also referred to as an R-shaped frame). The support plate 18 is a member made of plywood, and those having various radii of curvature and vertical and horizontal dimensions are created and stored in advance so as to correspond to the curvature of the curved plywood that is the workpiece. The inverted U-shape (see FIG. 3B) is composed of a semicircular arc portion and a rectangular sandwiching portion, and is provided with a rectangular sandwiching portion, thereby providing a semicircular shape. This is used when the curved plywood is desired to be disposed further upward than when the support plate is used. A semicircular (see FIG. 3A) or inverted U-shaped (see FIG. 3B) support plate is arbitrarily selected and used in accordance with the height position of the circular saws 26 and 29.

  A plywood presser 21 that is long in the extending direction of the linear rail 6 is attached to the lower end of the air cylinder 16, that is, the tip of the rod 17. The plywood presser 21 is a rectangular parallelepiped wooden member having a predetermined height, and is formed, for example, by connecting a plurality of square members in the height direction. The plywood presser 21 suspended from the tip of the rod 17 is used as a backing plate for equally applying the pressing force of the air cylinder 16 to the curved plywood W and for leaving no rod marks on the curved plywood W. When the separation distance to the curved plywood W placed on the support plate 18 is large (that is, when the expansion / contraction stroke of the air cylinder 16 is smaller than the separation distance), it is used as a spacer for filling the separation. A plywood presser 21 having a desired height can be easily formed by connecting square members having a predetermined height with a metal fitting such as a nail.

  On the table 7, a plurality of support plate holding means 22 are provided at regular intervals along the extending direction of the linear rail 6. FIG. 4 is a perspective view schematically showing an example of the support plate holding means. The support plate holding means 22 includes a fixing portion 23 fixed on the table 7, a sliding portion 24 slidably disposed on the table 7, and a spring that presses the sliding portion 24 toward the fixing portion 23. And a member 25. In the present embodiment, the fixing portion 23 is formed by fixing an L-shaped steel plate installed in the width direction of the linear rail 6 to the table 7. Due to the pressing force of the spring member 25, the sliding portion 24 is normally in a position where it approaches or contacts the fixed portion 23 (closed state, see FIGS. 4 and 6). The sliding portion 24 can be moved away from the fixing portion 23 (open state, see FIG. 8). After the support plate 18 is disposed between the fixed portion 23 and the sliding portion 24 in a state where the sliding portion 24 is moved away from the fixed portion by human power or the like (opened state), the sliding portion 24 is slid with the fixed portion 23 in a closed state by a spring force. The support plate 18 can be detachably held on the table 7 by sandwiching the support plate 18 with the moving part 24. That is, according to the support plate holding means 22, the support plate 18 is erected on the table 7 by sandwiching the support plate 18 between the fixed portion 23 and the sliding portion 24 and energizing it with the spring member 25. Can do.

  As shown in FIG. 2, the support plate 18 is arranged such that the arc portion 19 faces upward in the width direction of the linear rail 6 by such support plate holding means 22. As described above, a plurality of support plates 18 having different curvature radii of the arc portion 19 are provided, and the support plate 18 corresponding to the curvature of the curved plywood W that is a workpiece is selected from these support plates 18. It is selected and placed on the table 7.

  Cutting devices 27 and 30 are installed at predetermined positions on both outer sides of the base 2 (near the center in the longitudinal direction of the base 2). The respective cutting devices 27 and 30 move the circular saws 26 and 29 as cutting means, the hoods 28 and 31 for sucking and collecting the chips, and the circular saws 26 and 29 in the height direction (vertical direction). Position adjusting means (not shown) composed of a Z-axis drive unit, a Y-axis drive unit that moves the circular saws 26 and 29 in the width direction of the linear rail 6 (left and right direction in FIG. 7), and roll rotation (Y An angle adjusting means (not shown) for rotating the roll with the X axis perpendicular to both Z axes as a roll axis (see FIGS. 6 and 7) is provided. In the present embodiment, the Z-axis drive unit and the Y-axis drive unit are realized by a conventionally used ball screw feed mechanism, and the height direction and the width direction (the left-right direction in FIG. 7) are controlled by a manual handle or an electric motor. ) Position can be adjusted. Further, the angle adjusting means has a rotating shaft arranged in the roll axis direction and connected to the circular saw. By rotating the rotating shaft by a manual handle or an electric motor, the circular saws 26 and 29 are curved in FIG. The roll can be rotated in the direction indicated by the arrow.

  These circular saws 26 and 29 are set to rotate in such a manner that the curved plywood W is cut from the same surface side (for example, cut from the upper surface to the lower surface of the curved plywood W). ). By the pair of circular saws 26 and 29, the curved plywood W is cut or cut. As described above, the positions and roll angles of the circular saws 26 and 29 can be manually adjusted by rotating a manual handle (not shown). However, the circular saws 26 and 29 are driven by an electric motor constituting each drive unit and angle adjusting means. Adjustment can also be made by outputting a signal and rotating the electric motor. That is, as schematically shown in FIG. 2, each drive unit and angle adjusting means constituting the cutting devices 27 and 30 are connected to a control unit 32, and this control unit 32 is connected to an operation panel 33 as an interface. ing. The operator inputs information such as a desired amount of movement to the operation panel 33, so that the control unit 32 applies to each electric motor constituting the Z-axis drive unit / Y-axis drive unit (position adjustment unit) and angle adjustment unit. By outputting the drive signal, the position and roll angle of the circular saws 26 and 29 in the YZ direction can be adjusted.

  FIG. 5 is a perspective view schematically showing an example of a curved plywood which is a workpiece of the present invention. The curved plywood W, which is a workpiece of the present invention, is obtained by applying an adhesive to a plurality of single plates (plywood) and bonding them together to form a plate material between male and female dies having a desired bending (curvature) radius. It is formed by putting and pressurizing. The curved plywood W is formed by laminating a plurality of veneers, and the variation in dimensional accuracy of each veneer (each layer), misalignment when pasting each other, and the difference in arc length between the outer and inner layers As a result, irregularities occur at each end.

  Next, the process of the curved plywood processing apparatus 1, that is, by cutting the ends of the curved plywood W with a predetermined dimension with high precision, the unevenness of each end is processed to form smooth side surfaces. The process will be described.

  [First Step] Initial State (FIGS. 6 and 7): First, as shown in FIGS. 5 and 6, the table 7 is moved and placed on one end side of the linear rail 6. The rod 17 of the air cylinder 16 is in the raised position, and a space is provided between the plywood presser 21 and the table 7 so that the support plate 18 and the curved plywood W can be taken in and out.

  [Second Step] Preparatory Step (FIGS. 8 and 9): The operator can use the curvature of the curved plywood W, which is a workpiece, from a wide variety of support plates with different curvature radii that have been manufactured and installed in advance. As shown in FIGS. 7 and 8, the support plate 18 corresponding to the above is selected, and the support plate 18 is erected on the table 7 so that the arc portion 19 is on the upper side. At this time, a plurality of support plates 18 are sandwiched between arbitrary support plate holding means 22 in accordance with the dimensions of the curved plywood W (the dimensions in the horizontal direction when laid down as shown in FIG. 1). In the case shown in FIG. 7, three semicircular support plates 18 are erected on the table 7.

  [Third Step] Workpiece Placement Step (FIG. 1): Next, on the circular arc portion 19 of the support plate 18, a curved plywood W (before the side edge processing) Place with the layer side (concave side) facing down. Then, as shown in FIG. 1, the air cylinder 16 is operated to extend the rod 17 downward, and the curved plywood W is pressed downward via the plywood presser 21. Thus, the curved plywood W is pressed to prevent the curved plywood W from being displaced.

  [Fourth Step] Circular Saw Adjustment Step (FIG. 2): Next, the cutting edges of the circular saws 26 and 29 are arranged toward the center of curvature of the curved plywood W as schematically shown by broken lines in FIG. As described above, the positions and angles of the circular saws 26 and 29 can be adjusted manually by rotating the handle. However, a desired movement amount is input to the operation panel 33 so that the position adjusting means and the angle adjusting means can be adjusted. It is also possible to adjust by driving the electric motor.

  [Fifth Step] Cutting Step (FIG. 10): The table 7 is moved in the direction in which the circular saw 26 is arranged. The pair of circular saws 26 and 29 are rotated together at the same speed to cut both side edges of the curved plywood W. Note that when cutting for the first time, it is desirable to test cut about several millimeters to several centimeters, and measure the distance (arc distance) of the cut position after the trial cutting with a tape measure or the like. If it is within a predetermined dimension (allowable error), the table 7 is moved to cut the edge, and if the error is large, the arrangement of the circular saw is adjusted again and the trial cut is performed again. Both side edges of the curved plywood W are simultaneously cut. Since the curved plywood is pressed downward, positional displacement can be prevented. By using the two circular saws 26 and 29, both side edges of the curved plywood W can be cut simultaneously, so that both side edges can be cut in parallel and the time required for finishing can be shortened. Can do.

  [Sixth Step] Ending Step (FIG. 11): When the table 7 has been fed to the end of the curved plywood W, the rotation of the circular saws 26 and 29 is stopped, the rod 17 is raised, and then the curved plywood W is removed. . Finally, with the support plate 18 standing, the table 7 is returned to the initial state (FIG. 1), and thereafter the same process (the second and fourth processes are the second and subsequent cutting processes). Can be omitted), the edge processing of a large number of curved plywoods W can be performed quickly.

  As described above, the support plate is a plate-like member formed in a semicircular shape or an inverted U-shape (see FIG. 3), and has various curvature radii corresponding to the curvature of the curved plywood that is the workpiece. Those having vertical and horizontal dimensions are created and stored in advance. Therefore, any semicircular or inverted U-shaped support plate can be selected and used in accordance with the height position of the circular saws 26 and 29. In other words, the circular saws 26 and 29 can be moved and adjusted in accordance with the height position of the curved plywood W arranged on the support plate 18, but any semicircle can be adjusted in accordance with the height position of the circular saws 26 and 29. Or an inverted U-shaped support plate can be selected and used. Thereby, even if the movable amount in the height direction of the circular saws 26 and 29 (movable stroke of the Z-axis drive unit) is small, it is possible to cope with processing of curved plywood having various radii of curvature.

  Since cutting is performed after the cutting edges of the circular saws 26 and 29 are arranged toward the center of curvature of the curved plywood W, the finished surfaces of both side edges of the curved plywood W are directed toward the center of curvature. When the curved plywoods W as the formwork panels are connected to each other, both side edges of the formwork panels as the connection portions can be connected without a gap.

  Further, when the separation distance to the curved plywood W placed on the support plate 18 is large (that is, when the expansion / contraction stroke of the air cylinder 16 is smaller than the separation distance), the plywood presser 21 is used as a spacer to fill this separation. As described above, the plywood presser 21 having a desired height can be easily formed. That is, a plywood support plate or plywood presser having a desired shape can be easily formed and used as the height position adjusting means of the curved plywood without preparing a cutting device or air cylinder with a large movable amount. Therefore, it is possible to perform processing of curved plywood having various shapes without cost.

  When a plywood formwork panel formed by laminating a plurality of plywood plates is to be bent mechanically using a fastening bracket such as a turnbuckle at a construction civil engineering site, it is originally a flat plywood plate. It is difficult to form a beautiful aspect from this, and if you try to bend it forcibly, the arc length on the inner layer side and the outer layer side will be different, so the adhesive joining each plywood will be destroyed, and the radius of curvature will be There is a problem that it is not possible to cope with small (curved) curves. In this regard, the present invention does not cause such a problem because a plurality of formwork panels that have been processed to have a desired radius of curvature in advance in a factory are carried in and connected to the site.

  The processing apparatus for curved plywood according to the present invention can be used for processing both side edges of the curved plywood, but is not limited to this, and can be generally used for cutting curved plywood.

DESCRIPTION OF SYMBOLS 1 Processing apparatus of curved surface plywood 2 Base 3 Base frame 4 Support column 5 Stage 6 Linear rail 7 Table 8 Wheel 9 Sprocket 10 Wire 11 Connection part 12 Frame 13 Front end side support column 14 Rear end support column 15 Beam 16 Air cylinder (Pressing means)
DESCRIPTION OF SYMBOLS 17 Rod 18 Support plate 19 Arc part 20 Clamping part 21 Plywood presser 22 Support plate holding means 23 Fixing part 24 Sliding part 25 Spring member 26 Circular saw 27 Cutting device 28 Hood 29 Circular saw 30 Cutting device 31 Hood 32 Control part 33 Operation panel (input means)
W Curved plywood

Claims (5)

A table that moves on a straight rail laid on the base;
A pressing means provided with a rod which is installed above the table via a frame fixed to the table and expands and contracts in the vertical direction;
A support plate comprising an arc portion processed to a radius of curvature corresponding to the curvature of a curved plywood that is a workpiece;
A pair of circular saws disposed on both outer sides of the base,
After the support plate is erected on the table with the arc portion facing upward, the curved plywood is placed on the arc portion, and the curved plywood is pressed downward by the rod, and the table is An apparatus for processing a curved plywood, wherein both ends of the curved plywood are simultaneously cut by moving toward a circular saw.   2. The curved plywood processing apparatus according to claim 1, wherein the cutting edges of the pair of circular saws are arranged toward the center of curvature of the curved plywood placed on the support plate.   A support plate holding means comprising: a fixing portion fixed on the table; a sliding portion slidably disposed on the table; and a spring member that presses the sliding portion toward the fixing portion. The support plate is erected on the table by sandwiching the support plate between the fixed portion and the sliding portion and energizing the spring plate with the spring member. The machine for processing curved plywood as described.   A plurality of the support plate holding means are arranged at regular intervals along the extending direction of the linear rail, and a plurality of support plates are arbitrarily attached to the support plate holding means according to the size of the curved plywood that is a workpiece. 4. The curved plywood processing apparatus according to claim 3, wherein the curved plywood is supported by a plurality of the support plates, the curved plywood sandwiched between the plurality of support plates. 5. The curved surface according to claim 1, wherein a long plywood presser is attached to a lower end of the rod in the extending direction of the linear rail, and a curved plywood as a workpiece is pressed through the plywood presser. Plywood processing equipment.

Images