JPS62176744A - Automatic continuous multisurface grinding operating method for square stone - Google Patents

Abstract

PURPOSE:To enable saving of a labor, by a method wherein a gantry type stone grinding device and a gantry type stone turning-over device are situated in juxtaposition at a distance therebetween, common rails are installed in the two devices, and a truck tracted by a winch is reciprocatively run. CONSTITUTION:A truck 21, on which a square stone 22 is loaded, is tracted by a winch to be conveyed in a gantry type stone grinding device, and the upper surface of the stone is roughly and final-finishing-grounded by a grinding head. Thereafter, the stone is conveyed in a gantry type turning-over device, a stone position is detected by photoelectric tube detecting means 29 and 29', a pair of grasping means 27 and 27' are lowered to nip the stone in positions situated laterally opposite to each other, the stone 22 is lifted up once to rotate it properly, with other surface up, the stone is lowered, it is placed on the truck 21 again, and is conveyed to the gantry type stone grinding device again. Through automatic repetition of the motion, multisurface grinding finish of the square stone 22 can be continuously executed. This constitution enables saving of a labor and improvement of productivity.

Description

[Detailed description of the invention] The present invention relates to a continuous automatic multi-face polishing operation method for rectangular stones.

Today, when polishing square stones, it is possible to automatically polish a single surface from rough cutting to final finishing thanks to the advent of stone polishing machines that rotate intermittently a polishing head equipped with various types of polishing wheels. However, the so-called unmanned continuous reading automatic multi-surface polishing operation, which is performed by automatically switching to the 11 (α-th order) after polishing one surface is completed, is not performed.

The present invention smoothly performs an unmanned continuous automatic multi-face polishing operation, so that the entire surface automatic polishing work of rectangular stones (such as gravestones) can be carried out completely unattended even at night, for example.

An example of implementing the method of the present invention will be described below based on the drawings.

FIG. 1 shows a gate-type stone polishing apparatus used in the present invention, and 1 is a beam, which is supported by supports 2a, 21) so as to be movable up and down. 8a and 3b are guide rails completely installed on the beam 1, and 4 is a running platform that supports the guide rails 3a and 3.
Wheels 5 are provided which run while being guided by the beam 1, and the running base 4 is rotated by the forward and reverse drive of a rack tooth (not shown) built into the beam 1 and a motor 6 attached to the running base 4Ill. It is designed to move left and right by meshing with a moving worm gear (not shown).

7 is another beam supported by the supports 2a and 2b, and a threaded rod 8 is connected to the motor 9 (1 on the back side of the drawing) on the mJ surface.
(see Fig. 3), and the threaded rod 8 simultaneously rotates the threaded rods 10a and 10b arranged in parallel in the length direction of the columns 2a and 2b. Rod 10 black tab,! : Threaded points lla, ll
The beam 1 is raised and lowered via the beam 1b.

Reference numeral 12 denotes a mother base that is provided to move up and down in the vertical direction of the traveling base 4 by the drive of a motor 13, and a polishing head 14 is attached to the lower end of the base 12 by a motor 5 (on the back side of the drawing, see Figure 3). The polishing head 14 has a plurality of cylinders (six in the illustrated example) of grindstone support means 16 arranged at equal intervals. A rotating shaft having a grinding wheel 17 fixed to the lower end thereof is attached to the head 14 so as to be rotatable and slidable downward a certain distance.

On the other hand, 18a and 18b are air cylinders fixed to both side walls of the base 12, and each piston tip of the air cylinder is engaged with a rotating shaft in the polishing head 14, and a spindle case is used to rotate this. 19 is attached, and the spindle case 19 is an air cylinder 18a.

181) engages the polishing head 14 in the lower position and lowers it a certain distance to bring the polishing wheel 17 into pressure contact with the stone surface, and its rotation polishes the contact surface. It is.

20.20' is a rail laid across the inside of the gate-type stone polishing apparatus, 2 is a truck that runs on the rail, 22 is a stone placed on the truck, and 23.231 is a rail laid on the truck 21. Each support 2a is placed between the stones 22 to be placed,
This is a phototube detection means placed on the second fence side.

Next, FIG. 2 shows a gate-type stone reversing device used in the present invention, in which 25 is a beam supported vertically movably on a column 2626'. 27.271 is the beam 25 above
Each gripping means 27.271 is a holding block 27c provided with a base 27a (97'a) and a reversing rod 27b (271b).
(27'c) Each base 27a, 27'a is inverted by meshing with a worm gear (not shown) which is rotated by forward and reverse drive of a larter 28.281 built into the beam 25, and a reversing rod 27b. , 271b can be changed as appropriate. This time 27d, 27d
1 is a motor for rotating each reversing rod 27b, 27+b, and each reversing rod 271) 2
7'b is provided with a locking means for safely locking a certain pressing state. Note that 29 and 29' are phototube detection means attached to the side surface of the outer cylinder of each of the reversing rods 27b and 27'b.

On the other hand, 30 is another beam supported by columns 26 and 261. A screw rod 31 is held on the upper surface so as to be rotated by the drive of a motor 32, and the screw rod 31
1 is a screw rod 33 arranged in parallel on one side of the support column 26.261
．． 33' are rotated at the same time.
(See figure) At this time, the threaded rods 33, 33' are screws that fix both ends of the beam 25 and allow it to slide against the supports 26, 26'.
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The beam 25 is moved up and down by reverse rotation at the 8th point 11. Incidentally, reference numeral 36 is a regulating rod installed between the beam 30 and the base plate 37 to regulate the upper and lower limits of the above-mentioned lifting and lowering operations, and limit switches 88a and 88b are installed at fixed height positions on the upper and lower sides. ,
As the beam 25 moves up and down, a protruding dog 39 comes into contact with the post 35.

On the other hand, inside the apparatus, rails 20 and 20' are extended and laid across the inside of the gate-type stone polishing apparatus, and the trolley 21 is reciprocated between the two by means of a winch means, which will be described below. become what is done. In addition, 40.401
is a phototube detection means disposed on each support column 2626' side so as to sandwich the stone 22 placed on the trolley 21.

FIG. 3 shows the gate-type stone polishing device and the concave stone reversing device at a rate tLz20.20'1 and the rail 20.20'.
It is a side view showing a state in which the trolleys 21 running above are common and are arranged in parallel at a position lowered by a certain distance, and the trolleys 21 are connected to the rails 2.
One of the drums (drum 41 in the LIJ example) is not connected via a wire rope 43 to drums 41 and 42 disposed at both ends (the right end in the illustrated example) of 0.20'.
) is driven by the motor 44 to move in the right and left directions as appropriate by rotating the motor 44 in the forward direction and in the reverse direction. In addition,
Reference numeral 45 denotes an operation panel with a built-in computer located on one side of the device.

4A to 4F are explanatory views of the operation. First, as shown in A, a cart 21 is placed near the winch on the side of the stone reversing device, and the stone 22 is placed on the cart 21. , and then turn on the start button on the operation panel 45. Then, the motor 44 is driven and the cart 21 travels in the direction of the arrow (in the opposite direction), and at this time, the stones 22 on the cart 21 pass through the gate-shaped stone reversing device while temporarily blocking the phototube detection means 40 and 401. (See Figure B) When the gate-shaped stone polishing device is reached, the phototube detection means 23, 23' detects this and the trolley 21 stops (see Figure C). The polishing head 14 is lowered from above to a certain height position above the stone material 22, and at this position, the grinding wheel supporting means air cylinder 18a to which the rough grinding stone is attached is first moved.
, 181), the rough grinding stone on the lower end surface is brought into contact with the surface of the stone 22 under constant pressure to perform the polishing work.

At this time, the trolley 21 is moved according to the width 0 of the stone 22 placed on it (the width S is determined by the light beam detected by the straight pipe detection means 40, 401 when the stone 22 first passes through the concave stone reversing device). The dimensions are processed as data and input into the controller 4111 board 45). The final polishing process is carried out by replacing the grinding wheel with a new one.

When the final final polishing is completed, the operation of the air cylinders IBa and 18b is stopped and the polishing head 14 is raised, and the carriage 21 is moved in the direction of the black arrow (b) shown in Figure E. The stone is moved towards the recessed stone reversing device, in which the photocell detection means 40.401 detects the ml edge e of the stone 22 and moves it a certain distance, more precisely, to the 100 center second ring division position. When it reaches the destination, it will stop as shown in Figure F, and the rest will be as shown in Figure 5 A.
-F, the beam 25 is lowered and the gripping means 27.
27' is used to invert the stone 22.

Next, to explain this, the gripping means 27, 271 (specifically, the inverted rondo 271), the photocell detection means 29, 291 provided on the side surface of 2τb are set at a certain distance from the upper edge of the stone 22 using data processing as described below. When the beam 25 descends, the downward movement of the beam 25 is stopped, and this position indicates the position of the center of gravity of the stones 22 with respect to the vertical and stacked dimensions of the stones 22. This is because when the upper limit height of the beam 25 is determined by setting the limit switch 38a of the regulating rod 36, the following relational expression is established between this and other dimensions.

(See Figure 2) H= Ht + 8 +, h + H2 However, H...
- Distance (constant value) between the board and limit switch 38a Hl...Distance (constant value) between limit switch 38a and light 1 straight tube detection means 29 (29') e...Phototube detection means 29 ( 29') and the top surface of the stone h...height of the stone Hl...height from the base to the top of the cart (constant value) Now, the beam 25 is moved from its upper limit position (state 1 in Figure 2). After descending a certain distance (as shown in FIG. 5A), the reversing rod 27b
, 27'b, when the phototube detection means 29.29' detects the upper surface of the stone 22, the descending distance corresponds to e, so it is immediately calculated as, and the beam descends at the constant distance calculated above. shall be suspended. (Figure B
Note that in the lateral direction, since the above-mentioned traveling stop position of the cart is already on the center bisector of the stones 22+tS, the above position is the correct center of gravity of the stones 22.

In this way, the stone 220 weight and the knob rolling rod 271) are placed at position b.
27'l) are facing each other, the motors 28 and 28' are driven to move the bases 27a and 27'b in the direction of arrow C4), and as shown in Figure C, the stone 22 is placed between the reversing rods 27b and 271. After the clamping, the clock beam 25 shown in the figure is slightly raised to a height that does not interfere with the inversion of the stone 22, and the motor 27CL,
The beam 25 is then rotated by 90 degrees as shown in Figure E by the drive of 2γd.Then, the beam 25 is lowered as shown in Figure F, the stone 22 is placed on the cart 21 again, and the gripping means 27, 271 and the beam 25 are It returns to its original position (the state shown in Figure 2).

When the above-mentioned work is completed, the cart 21 is again run towards the concave stone polishing device, and the polishing work of the above-mentioned 4 replaced surfaces is performed as described above.When the polishing work is completed, the gate-shaped stone is turned over again. The polishing process returns to the apparatus and is converted to other surfaces in the same manner, and the same process is repeated to automatically polish each surface of the stone 22 one after another.

In the above embodiment, one stone 22 is placed on the cart 21,
Although an example has been described in which each surface of the stone 22 is automatically polished, a plurality of stones may be placed on the cart 21.

For example, when two stones 22a and 22b are placed on the cart 21, the cart 21 is placed first at the gate type stone polishing device.
The upper front side stone 22a is polished, and when the polishing of the stone is finished, the rear side stone 22b is polished, and when the polishing work is completed and it is returned to the concave stone reversing device and reversed. Conversely, the stones 22b on the rear side are sequentially reversed, and the stones 22a are turned over last.

In the present invention, the above-mentioned series of operations is carried out by placing stones on the cart, turning on the start button on the operation panel 45, and causing the cart to travel! Relatedly, the rest is performed automatically by a sequence circuit built into the operation panel 45 and data processing by a computer. For example, multifaceted polishing of rectangular stones can be carried out continuously even at night, completely unattended. This makes it possible to complete the process at once, making a significant contribution to labor saving and productivity improvement.

[Brief explanation of drawings]

The attached drawings are an explanatory diagram of an apparatus for carrying out the method of the present invention and its operation, and FIG. 1 is a front view of the concave stone polishing apparatus, and FIG.
The figure is a front view of the concave stone reversing device, Figure 3 is a side view of both of the above devices installed side by side at a constant distance, and Figures 4 A to F.
5 is an explanatory view of the operation in a state in which a cart carrying stones is traveling back and forth between the two devices, and FIGS. 5A to 5F are explanatory views of the operation in a state in which the stones are reversed. 10.・Beam 2a, 2b... Support 4...
Traveling stand 7... Pabeam 8... Screws 12... Mother stand 14...
- Polishing head 16 ... Polishing disk support means 17
... Polishing whetstone 18a, 18'b ... Air cylinder 19 ... Nupindle case 20.
20'...Rail 21...Bolly 2
2...Stone material 23.231...Phototube detection means
25... Beam 26.26'... Support
27.271...Gripping means 27a, 2γa
' ,,, Mother stand 27'b, 27'b-' Reversal o
Tsudo 28.28'...Motor 29.291
...Phototube detection means 30...Beam 3
1...screw soil 32...motor 34.34
1...Nulighter 36...Regulation rod B8
a, 38b... Limit switch 40.40'
...Light/buried pipe detection means 44...Motor 45...Operation panel No. 4 A $4r No. - Fig. 5 Fig. 5 D Sj Fig. 5 St

Claims (1)

[Claims] (1) A gate-type stone polishing device and a gate-type stone reversing device are installed side by side at a certain distance, a common rail is laid inside both devices, and square stones are placed on a cart pulled by a winch. On the other hand, the gate-type stone polishing device is equipped with phototube detection means for detecting the position of the stone on the cart and a polishing head that rotates intermittently. A plurality of grinding wheels are attached and pressed with a constant pressure, and the gate type stone reversing device has a photocell detection means for detecting the position of the stone on the cart, and a stone turning device that lowers the stone from a certain height position with respect to the stone on the cart. and a pair of gripping means for gripping from left and right opposing positions, and each gripping means is configured to appropriately rotate the clamped stone to change it to another surface, and also includes a winch operation and a winch operation for reciprocating the cart. A series of polishing operations accompanied by intermittent rotation of the polishing head in the gate-type stone polishing device, and a pair of gripping means in the gate-type stone reversing device that grips and rotates the stone to change it to another surface. An automatic continuous multi-face polishing method for rectangular stone, characterized in that the operation is performed by a sequence circuit built into a separate operation panel and data processing by a computer.