JPH032629B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a polishing apparatus for polishing the upper surface, edge surface, and corner portion of the edge surface of a flat steel plate using an abrasive belt.

B. Prior Art When polishing the top surface, edge surface, or corner of a steel plate with a large area, for example, a polishing device equipped with a polishing belt is used and the device is moved along the steel plate, or the device is The steel plate is fixed while being polished while being moved. However, in conventional polishing equipment, the polishing surface of the polishing belt is held in a fixed position, so in order to polish the three sides of the steel plate, dedicated polishing equipment must be used for each, resulting in high equipment costs. When I got there, I had a problem.

B. Purpose of the Invention This invention provides a contact wheel that presses the polishing belt against the surface to be polished so as to be swingable about an imaginary center outside the frame body, so that the polishing surface of the polishing belt can be adjusted from a horizontal position to a vertical position. It is an object of the present invention to provide a polishing device that can polish various surfaces of a steel plate by adjusting the angle of the polishing device.

C. Structure of the Invention The present invention provides a polishing machine that is equipped with a driving wheel and a driven wheel, has an abrasive belt device mounted on a self-propelled frame body, and performs polishing work while moving over the surface of an object to be polished. It is attached to the frame body so that its height can be adjusted in the vertical direction while protruding to one side perpendicular to the running direction, and is formed in concentric circles with a virtual center below the frame body along the above-mentioned protruding direction. A guide frame having a plurality of circular arc-shaped long holes, and a contact wheel that can be fixed at any position within the circular arc-shaped long holes of the guide frame, and a shaft of the contact wheel can be freely rotated on the lower side so as to be orthogonal to the running direction. A swinging frame has two idler pulley shafts rotatably supported in parallel with the running direction on its upper part, and one end is wrapped around the contact wheel of the swinging frame in a U-shape, and wrapped around the two idler pulleys, the other end of which is stretched endlessly around the belt driving means on the frame body and the direction changing pulley, This makes it possible to set the axis of the contact wheel at any angle around the virtual center of the arcuate long hole while maintaining a constant tension relationship between the two idler pulleys and the contact wheel relative to the abrasive belt. .

D. Embodiment FIGS. 1 to 3 are drawings showing an embodiment of the present invention, and show a self-propelled polishing device. In the figure, 1 is the frame body to which various parts are attached,
Drive wheels 2, 2 are provided on both sides of the front, and driven wheels 3, 3 are provided on both sides of the rear. 4 is a driving drive motor installed on the front upper surface of the frame body 1, and a clutch 5, a reduction gear, and a chain drive the drive wheels 2 through a power transmission means (not shown) such as gears. It is constructed so that it can run on its own at a constant speed.

Reference numeral 6 denotes a drive pulley disposed above the center of the frame body 1, and is fixed to the output shaft of a belt drive motor 8 installed on a support base 7 fixed on the frame body 1. 9 is a tension pulley arranged to face the drive pulley 6 in the longitudinal direction and with its peripheral surface parallel to the width direction;
Two guide rods 1 fixed upright on a support stand 7
It is rotatably attached to a slide block 11, which is slidably attached to 0 and 10. An adjustment screw 13 is inserted into the slide block 11 and is rotatably supported through an upper connecting plate 12 connected to the upper ends of the guide rods 10, 10. By rotating the adjusting screw 13,
The slide block 11 moves up and down to adjust the position of the tension pulley 9. Further, a spring 16 is compressed and interposed between the lower surface of the slide block 11 and a support plate 15 fixed to the lower end of the adjustment screw 13, so that the slide block 11 and the adjustment screw 13 are accurately screwed together. . 17
is a direction changing pulley rotatably mounted between the drive pulley and tension pulley 9 and on the lower side surface of the frame body 1 so as to be orthogonal to these pulleys 6 and 9.

Idler pulleys 18 and 18 are arranged on the sides of the drive pulley 6 and tension pulley 9, respectively, and are rotatably attached to the upper ends of both side walls of the swing frame 19, which is bent into a U-shape. . A contact wheel 20 is rotatably mounted below the center of the swing frame 19 so as to be orthogonal to the idler pulleys 18, 18. The contact wheel 20 is made of, for example, hard elastic rubber in order to increase the friction resistance of the circumferential surface, and the circumferential surface is appropriately textured.

Reference numerals 21 denote the drive pulley 6, the tension pulley 9, the direction conversion pulley 17, and the idler pulley 1.
8, 18, an abrasive belt which is attached endlessly over the contact wheel 20, and has appropriate abrasive grains attached to its surface.

Reference numeral 22 denotes a guide frame for supporting the swing frame 19, which is bent into a U-shape, and has a boss portion 23 fixed to the central wall surface 22a, which can be slid freely onto a support column 24 fixed to the support base 7 in the vertical direction. Concentric arc-shaped elongated holes 25 and 26 are formed in both side wall surfaces 22b and 22b, respectively. The centers of the long holes 25 and 26 are the steel plate 2 that is the object to be polished.
The curvature is set to be approximately at the center of the plate thickness of No. 8, and is formed over a range of at least 90°. Then, insert the swing frame 19 into the guide frame 22, and
Bolts 29, 29 protruding from both side walls of the guide frame 22 are made to protrude outward from elongated holes 25, 26 formed in the guide frame 22, and are fixed by tightening nuts 30 thereto.

Reference numeral 31 denotes a screw shaft that passes through the support base 7 and screws the lower threaded portion into the guide frame 22. By rotating the screw shaft 31, the guide frame 22
It is configured so that its height can be adjusted.

Reference numerals 32 and 33 denote guide rollers disposed on the front and rear sides of the device, and the rotating shafts 32a and 33a are connected to the bifurcated tip portions 34 of extendable and retractable connecting rods 34 and 35.
a, 35a, and the connecting rods 34, 3
5 are supported by support rods 36 and 37 fixed to the front and rear end surfaces of the frame body 1, respectively.
These guide rollers 32 and 33 are connected to the steel plate 28 to be polished.
The guide rotates while contacting the edge surface 28b of the guide to move the device linearly.

38 is a handle attached to the rear of the frame body 1 so as to be swingable; 39 is a control unit provided on the handle 38, and is provided with a control switch for controlling the traveling drive motor 4 and the belt drive motor 8 on and off. .

To explain the polishing operation in the above configuration,
First, when polishing the upper surface 28a of the steel plate 28, the swing frame 1 supporting the contact wheel 20 is
9 is erected so that the circumferential surface of the contact wheel 20 is parallel to the upper surface 28a of the steel plate 28, and in this state, the swing frame 19 is fixed to the guide frame 22. Then, with the driving wheels 2, 2 and the driven wheels 3, 3 placed on the steel plate 28, the screw shaft 31 is rotated to press the contact wheel 20 against the steel plate 28 with a constant pressure, and at the same time, the guide rollers 32, 33 are moved in the width direction. After adjusting the position and height position, the guide roller 32,
33 in contact with the edge surface 28b of the steel plate 28, the centers of the elongated holes 25, 26 of the guide frame 28 are set to be equidistant from the upper surface 28a and edge surface 28b of the steel plate 28. After that, the belt drive motor 8 is operated to rotate the drive pulley 6, the polishing belt 21 is circulated to polish the upper surface 28a of the steel plate 28, and at the same time, the traveling drive motor 4 is operated,
The driving wheels 2, 2 are driven to cause the entire device to run on the steel plate 28, thereby polishing the upper surface 28a (see FIG. 4).

Next, to polish the edge surface 28b of the steel plate 28,
Set the swing frame 19 in a free state and tighten the bolt 2.
9, 29 to the elongated holes 25, 26 of the guide frame 22.
While guiding the contact wheel 20, the contact wheel 20 is swung by 90 degrees to bring the circumferential surface of the contact wheel 20 into contact with the edge surface 28b in parallel.
In this state, the swing frame 19 is moved to the guide frame 2.
Fixed at 2. Then, the belt drive motor 8 and the running drive motor are operated to make the apparatus run by itself, while the polishing belt 21 is circulated to polish the edge surface 28b (see FIG. 5).

To polish the corner 28c of the edge surface 28b of the steel plate 28, the swinging frame 19 is guided by the guide frame 22 and swung in the same manner as described above to polish the peripheral surface of the contact wheel 20.
In this state, the belt drive motor 8 and traveling drive motor 4 are operated to polish the corner 28c of the steel plate 28 (see FIG. 6).

When polishing is performed and the polishing belt 21 is stretched, the adjustment handle 14 is operated to raise the tension pulley 9 to tension the polishing belt 21.
Furthermore, the positions of the idler pulleys 18, 18 and the contact wheel 20 are different depending on whether the upper surface 28a of the steel plate 28 is polished, the edge surface 28b, or the corner 28c, and the polishing belt required for polishing is different. Since the length of the belt 21 will change, in this case, for example, polishing belts of three different lengths corresponding to each polishing may be prepared and replaced for each polishing. Another method is to increase the adjustable range of the tension pulley 9, attach the longest polishing belt 21 to the contact wheel 20, and adjust the tension pulley 9 for each polishing. You may also do so.

E. Effects of the Invention As explained above, the present invention has a polishing belt device mounted on a frame body which is equipped with a driving wheel and a driven wheel and is capable of self-propelled, and performs polishing work while moving over the surface of the object to be polished. In the polishing machine, it is attached to the frame body so that the height can be adjusted in the vertical direction in a state that it protrudes to one side perpendicular to the running direction, and is concentrically arranged in the above-mentioned protruding direction with a virtual center below the frame body. A guide frame has a plurality of arcuate long holes formed along the guide frame, and the guide frame can be fixed at any position within the arcuate holes, and the axis of the contact wheel is arranged perpendicular to the running direction on the lower position side. A swinging frame is rotatably supported on a cantilever, and the shafts of two idler pulleys are rotatably supported on the upper part parallel to the running direction, and one end is connected to the contact wheel of the swinging frame in a U-shape. The rotating frame and the guide frame consist of a polishing belt which is wound around the above two idler pulleys, and the other end is stretched endlessly around the belt driving means and the direction changing pulley on the frame main body. The arc-shaped long hole allows the axis of the contact wheel to be set at any angle around the virtual center of the arc-shaped long hole while maintaining a constant tension relationship between the two idler pulleys and the contact wheel relative to the abrasive belt. Therefore, the frame body can be moved straight on the steel plate and the top surface of the steel plate can be polished in strips by the belt width from one side to the other. In this case, the contact wheel is biased to one side of the frame body. Because of this, it is possible to polish up to the edge of the steel plate without the wheels of the frame body coming off the steel plate, and at the opposite end, the running direction can be reversed, and the edge surface of the steel plate can be polished. If you do,
It is sufficient to fix the swinging frame in a position tilted approximately 90 degrees so that the axis of the contact wheel is perpendicular to the guide frame. Also, if the angle between the edge surface and the top surface of the steel plate is to be polished, It is sufficient to fix the moving frame at a position inclined at approximately 45 degrees to the guide frame, and in this way, the top surface, edge surface, and corners of the steel plate can be polished well with one device. In this case, preparation for the work can be done by changing the angle of the swinging frame, adjusting the tension of the tension pulley, or replacing the belt.Furthermore, since it is self-propelled, it can be used for large ship steel plates, etc. Can polish long and wide objects. In particular, when displacing the entire polishing head with respect to the frame body, the weight balance of the frame body changes significantly, which may impede running.However, in the present invention, only the relatively lightweight contact wheel and idler pulley are used. is attached to the swinging frame for displacement, and the drive means such as the relatively heavy belt drive motor are fixed fixed on the frame body, so there is no significant change in the weight balance of the frame body during any work. Therefore, stable running can be ensured, and good polishing work can be performed. Furthermore, by using a virtual center system as the center of swing of the swing frame relative to the guide frame, it is possible to achieve an extremely simple structure in which the swing frame is simply fixed at an arbitrary angular position relative to the arc-shaped elongated hole.
The structure can be made lighter and cheaper than when an actual pivot axis is provided. In addition, when changing the angle of the contact wheel to polish the top surface, edge surface, and corners of the steel plate, it is most rational to set the center within the thickness of the object to be polished. From this point of view, if the center axis of swing is actually set on the frame body side, the structure will not only be complicated, but it will also require large movements, but with the present invention, only small movements are required, and space is saved. It is also advantageous.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a polishing apparatus according to the present invention, and FIG.
The figure is a front view of the polishing apparatus, FIG. 3 is a plan view thereof, and FIGS. 4 to 6 are drawings showing examples of polishing. 1...Frame body, 4...Traveling drive motor, 6
...Drive pulley, 8...Belt drive motor, 9...
Tension pulley, 18... Idler pulley, contact wheel, 21... Polishing belt, 28... Steel plate.

Claims (1)

[Scope of Claims] 1. A polishing machine in which a polishing belt device is mounted on a frame main body which is equipped with a driving wheel and a driven wheel and is capable of self-propelled, and which performs polishing work while moving the surface of the object to be polished. A plurality of frames are attached to the main body so that the height can be adjusted in the vertical direction while projecting to one side perpendicular to the running direction, and are concentrically formed along the projecting direction with a virtual center below the frame main body. a guide frame having a long arc-shaped hole; and a guide frame that can be fixed at any position within the long arc-shaped hole of the guide frame, and the shaft of the contact wheel is rotatably cantilevered at the lower position side perpendicular to the running direction. and a swinging frame that rotatably supports the shafts of two idler pulleys parallel to the running direction on the upper part, and one end of the swinging frame is wrapped around the contact wheel of the swinging frame in a U-shape, and the middle part is wrapped around the contact wheel of the swinging frame. It consists of an abrasive belt wrapped around the two idler pulleys and the other end of which is stretched endlessly around the belt driving means on the frame body and the direction changing pulley; This feature allows the axis of the contact wheel to be set at any angle around the virtual center of the arcuate long hole while maintaining a constant tension relationship between the two idler pulleys and the contact wheel relative to the abrasive belt. polishing equipment.