JPH0533249Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a workpiece processing device, and more specifically, the blade of the processing tool is moved along the workpiece surface, and a predetermined amount is applied to the workpiece surface. It relates to a device that performs processing.

(Prior art) For example, in finishing the outer peripheral edge of an FRP waterproof floor pan in a bathroom unit, a sander as a processing tool is moved along the outer circumference of the waterproof floor pan, and its blade is The edge portion is ground by a grinder to remove burrs left on the edge portion when forming the waterproof floor pan.

In this case, the sander as a processing tool is usually moved linearly along the outer periphery of the floor pan while being fixed to its support member.

(Problem that the invention aims to solve) However, this waterproof floor pan is shaped so that the entire body is curved slightly toward the surface with a constant curvature, so that the center part bulges slightly toward the surface. (When the floor pan is installed and a weight is placed on it, the floor pan is made to be almost horizontal.)
Along with this, the outer peripheral edge portion is also curved with a large curvature. That is, the outer peripheral edge is rounded with a large curvature.

For this reason, if the sander is moved linearly in a fixed state, the rounded portion of the outer peripheral edge will be directly scraped off in a straight line. Furthermore, in some cases, a large load may be applied to the sander, causing the sander to be blown off during processing.

(Means for solving the problems) The processing device of the present invention was devised to solve the above problems, and its gist is as follows: (a) A cutting device is provided at the front end. a processing tool; (b) a support member that is provided to be movable along the surface to be processed of the workpiece and supports the processing tool so as to be swingable about its substantially central portion as a fulcrum; (c) the support member; (d) a spring means attached to the member and biasing the blade portion of the processing tool in a direction to move it away from the surface to be processed of the workpiece; By pushing out the rear part of the processing tool, the processing tool is rotated around the fulcrum, and the cutting tool on the front end side is rotated against the biasing force of the spring means to rotate the processing tool into the workpiece. and an air cylinder that presses against the surface.

(Function) In this device, the blade of the processing tool is pressed against the workpiece surface with a force corresponding to the difference between the biasing force of the spring means and the thrust of the air cylinder arranged at the rear side of the processing tool. and is moved along the surface to be machined under its pressing force. Therefore, in this device, the blade can be moved along the outline and shape line of the workpiece surface, for example, if the surface to be processed has a radius of large curvature, it can be moved along that radius. . This is because if the surface to be machined is smooth and has large protrusions, a large load will be applied to the blade of the processing tool (if the processing tool is applied to this protruding part, a large load will be applied to the processing tool). This is because the air cylinder that pushes out the rear side of the processing tool around its pivot center is overwhelmed by the reaction force, and the rod is pulled into the cylinder. Conversely, if there is a large recess, the air cylinder will overwhelm it and the rod will be pushed out from inside the cylinder. Large irregularities on the surface to be machined are absorbed by the extrusion and retraction movements of the rod. Therefore, the blade of the processing tool can move smoothly along the shape line of the surface to be processed, and the small irregularities on the surface to be processed are removed, resulting in a clean finish on the surface to be processed. It is.

(Example) Next, an example in which the present invention is applied to a device for deburring the outer peripheral edge of a waterproof floor pan in a unit bathroom will be described in detail with reference to the drawings.

In FIGS. 2 to 4, reference numeral 10 denotes a base frame, and support frames 12 are erected on both sides of the base frame (in the left-right direction in FIG. 3). A lifting frame 14 is disposed between the pair of support frames 12 as shown in FIG. , is adapted to be raised and lowered by this lifting cylinder 18. At this time, the lifting frame 14 is guided up and down by fitting the guide rod 36 attached to the support frame 12 and the guide bush 20 fixed to the lifting frame 14.

On the other hand, a support stand 22 is provided on the upper surface of the elevating frame 14.
is attached, and the entire turntable 24 is supported by this support base 22 in a rotatable manner and in a state that it can move up and down together with the support base 22.
That is, a pair of bearings 26 are fixed to the support base 22, and the rotating shaft 28 of the turntable 24 is supported by the bearings 26 so as to be rotatable at both the upper and lower ends and immovably relative to the axial direction. As the elevating frame 14 moves up and down, the turntable 2
4 can be raised and lowered as a whole.

A rotary drive cylinder 30 for rotationally driving the turntable 24 is also mounted on the lift frame 14 on the side of the rotary shaft 28 via a mounting base 31 . A rack 32 is fixed to the rod of this cylinder 30, and this rack 32 is connected to the turntable rotation shaft 2.
It meshes with a gear 34 fixed to 8. That is, the telescopic movement of the rotary drive cylinder 30 is transmitted to the lower end of the rotary shaft 28 via the rack 32 and the gear 34.

A one-way clutch 38 is attached to the rotating shaft 28 above the gear 34. The one-way clutch 38 transmits the driving force to the turntable 24 when the rotary drive cylinder 30 is extended, that is, when the rod of the cylinder 30 is pushed out, while the cylinder 30 is retracted. When the rod is retracted, the gear 34 and the rotating shaft 28
The lower end portion is rotated idly to cut off the driving force from the cylinder 30.

A disk-shaped positioning plate 40 is attached to the upper end of the turntable rotation shaft 28.
Four engagement grooves 42 are formed at 90-degree intervals on the outer circumference of the positioning plate 40, and engagement pins (stopper pins) 44, which will be described later, are engaged with the engagement grooves 42. ing. Note that the engagement groove 42
The opening of the engagement pin 4 is slightly wide.
4 can be smoothly inserted into the engagement groove 42.

The left side of this positioning board 40 (see Figures 2 and 4)
In the figure), a pin drive cylinder 48 is installed on a pedestal 46, and the above-mentioned engagement pin 44 is moved forward and backward by the expansion and contraction movement of this cylinder 48. The engagement pin 44 engages with the engagement groove 42 in its forward position and functions to stop the positioning plate 40 and, in turn, the turntable 24.

On the other hand, in front of the turntable 24, as shown in FIGS. 1 and 5, a sander 54 as a processing tool is arranged. In Figure 1, 56
is a support body for supporting this sander 54, and is connected to the rail 5 via a linear motion bearing (not shown).
8 is fitted. The support main body 56 can be smoothly moved forward and backward along the rail 58 by a ball screw mechanism (not shown). This support body 56 includes a support plate 6
4 is attached via a mounting base 62. A pair of bearings 66 is fixed to the lower surface side of the support plate 64, and a swing plate 70 is swingably supported via a shaft 68 attached to the bearings 66. The sander 54 is fixed to the swing plate 70 by a U-shaped wire 72, and is able to swing together with the swing plate 70. The sander 54 has a blade portion 55 at its front end, and this blade portion 55 is attached to the waterproof floor pan 5.
Chamfer the outer peripheral edge of 0.

A shock absorber 74 is attached to the lower surface of the support plate 64 at the front side of the shaft 68, and the tip of its rod is brought into contact with the swing plate 70. This shock absorber 74
has a built-in spring as a spring means, and exerts a biasing force on the swing plate 70. That is, the shock absorber 74 urges the blade portion of the sander 54 in a direction away from the surface to be processed of the waterproof floor pan 50.

On the other hand, an air cylinder 76 is attached to the rear end of the support plate 64 so as to face downward. A roller 7 is installed at the tip of the piston rod of the air cylinder 76.
8 is attached to the sander 54, and the thrust from the air cylinder 76 is applied to the sander 54 through this roller 78.
It is designed to extend to the rear side of the vehicle.

Next, the operation of this device will be explained.

A waterproof floor pan 50 as a workpiece is carried over rollers 52 (FIG. 2) with its lower surface facing up. At this time, the turntable 24 is in the lowered position, the engagement pin 44 is in the forward position (the engagement position with the positioning plate 42), and the turntable 24 is positioned and stopped.
Furthermore, the sander 54 is retracted to the upper or lower end in FIG. 5 by a ball screw mechanism.

In this state, the waterproof floor pan 50 is attached to the turntable 2.
4, the turntable 24 is raised by the lift cylinder 18 and lifts the waterproof floor pan 50. Then, when the waterproof floor pan 50 is lifted up to the rising end, the sander 54 is moved to the waterproof floor pan 50 by the above-mentioned ball screw mechanism.
It can be moved to the bottom of. At this time Thunder 54
As shown by the two-dot chain line in FIG. 1, the blade portion 55 of the shock absorber 74 is separated from the waterproof floor pan 50 by the biasing force of the spring built into the shock absorber 74. When the sander 54 has moved to the lower side of the floor pan 50, the air cylinder 76 is activated and its thrust is applied to the rear side of the sander 54. Then, the sander 54 rotates about the shaft 68 and presses the blade portion 55 against the outer peripheral edge surface (lower edge surface in FIG. 1) of the waterproof floor pan 50. Note that at this time, the thrust of the air cylinder 76 suddenly acts on the sander 54, but this sudden thrust is absorbed by the shock absorber 74, and no impulsive force acts on the sander 54. thunder 5
If the sander 54 is moved with the blade portion 55 of No. 4 pressed against the lower end surface of the floor pan 50, one side of the waterproof floor pan 50 is finished. At this time, if the lower end surface of one side of the outer periphery of the floor pan 50 forms a downward mountain shape, the blade portion 55 of the sander 54 will move following this shape line, and if it makes a large wave, it will move like this. It moves along the waves and smooths out minute irregularities on the end surface.

When the sander 54 reaches the reciprocating end of its reciprocating motion and finishes processing the above-mentioned side of the waterproof floor pan 50, the air in the air cylinder 76 is released, and the sander 54 is rotated by the biasing force of the spring in the shock absorber 74. 55 is separated from the waterproof floor pan 50. In this state, the turntable 24 is driven and rotated by the rotary drive cylinder 30, and when it has rotated exactly 90 degrees, the engagement pin 44 is advanced and engaged with the engagement groove 42 of the positioning plate 40, and the following steps are taken. Then, the turntable 24 is positioned and stopped. Then, air is supplied to the air cylinder 76 again, and the blade portion 55 of the sander 54 is pressed against the other side of the floor pan 50. In this state, the sander 54 is moved back on the rail 58 by the aforementioned ball screw mechanism. This completes the machining of the two sides of the floor pan 50, and by repeating the above operations, the machining of the other two sides is performed.

In this way, according to the present device, the edge surface of the floor pan 50 can be deburred while the blade portion 55 of the sander 54 is moved to follow the shape of the floor pan 50. Furthermore, by appropriately adjusting the thrust of the air cylinder 76, the pressing force of the sander blade portion 55 against the workpiece surface can be adjusted. Thereby, the machined surface can be machined while checking the finished state of the machined surface. Therefore, the surface to be processed can always be processed to a good finished state.

Although the embodiments of the present invention have been described in detail above, the present invention can be configured in various other forms.

For example, by using a tension spring as the spring means and arranging this on the rear side of the swinging fulcrum of the sander 54, the blade part 55 can be moved to the floor pan 5.
It is also possible to apply force in a direction away from the surface to be processed, and it is also possible to apply the present invention to the processing of workpieces other than the above-mentioned waterproof floor pans, such as bathtubs.

In addition, the present invention can be constructed with various modifications based on the knowledge of those skilled in the art without departing from the spirit thereof.

(Effects of the invention) As described in detail above, the present invention supports the processing tool in a swingable manner, and uses a spring means and an air cylinder to apply the blade part to the workpiece under a constant pressing force. It is designed to be pressed against the machined surface.

This makes it possible to move the blade of the processing tool along the shape of the surface of the workpiece while processing that surface, and also prevents the processing tool from being blown away by the large load applied to it. This also avoids the risk of being exposed.

[Brief explanation of the drawing]

Fig. 1 is a front view (partially sectional view) of the main parts showing the sander and its surroundings of a processing device that is an embodiment of the present invention, and Fig. 2 is a turntable and main parts of the surroundings of the same device. It is a front view (partial sectional view). FIG. 3 is a side view (partially sectional view) of the same turntable and surrounding parts, and FIG. 4 is a plan view of the main part of the processing apparatus (the turntable is excluded). FIG. 5 is a plan view showing the sander and its surrounding area of the same processing device. 50...Waterproof floor pan, 54...Sander, 55
...Blade portion, 56...Support body, 62...Mounting base,
64...Support plate, 74...Shock absorber, 76...Air cylinder.

Claims (1)

[Claims for Utility Model Registration] A device for machining a workpiece while moving the machining tool along the surface of the workpiece, comprising: a machining tool equipped with a blade at the front end; a support member that is provided to be movable along a machining surface and that supports the machining tool in a swingable manner about its substantially central portion as a fulcrum; a spring means for biasing the workpiece in a direction away from the surface to be machined; an air cylinder that rotates the tool around the fulcrum and presses the blade portion on the front end side against the workpiece surface of the workpiece against the biasing force of the spring means; .