JPH0259262A - Automatic beveling device for stone stock - Google Patents

Abstract

PURPOSE:To surely run a beveling guide even along the stone stock whose angular part, straightness, dimension, etc., are not accurate by making a beveling guide guiding a lapping wheel rockable freely by an universal joint. CONSTITUTION:Due to a stone stock A being low at its accuracy of the dimension, angles and straightness of each angular part (a), the angular part (a) is displaced either to the right or left from on the vertical line which passes the center line of the stone stock A. In this case, a frame body 26 is pivotally stopped to the lower end of a cylinder 21 via an universal joint 23 and made rockable freely, so it becomes superposed by following up correctly the adjoining two faces of the stone stock A and bevelling by a lapping wheel 37 can be executed accurately without the beveling being deviated. When the lapping wheel 37 returns to a standby position, a cylinder is contracted, a beveling guide 24 is ascended, the cylinder 16 interposing the stone stock A rotates the stone stock A 90 deg. and the succeeding angular part is located at the uppermost part.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is an automatic chamfering device for stones, and more specifically, an apparatus for automatically chamfering stones, and more specifically, an apparatus for automatically chamfering stones, which clamps square shaft-shaped stones, rotates them by a predetermined angle, and chamfers each corner. This invention relates to an automatic chamfering device.

[Conventional technology]

For example, if the corners of square shaft-shaped stones used for tombstones remain sharp, they will chip or crack due to external impact, so they must be chamfered.

Traditionally, chamfering of stone was done by hand.

(Problems to be Solved by the Invention) By the way, manual chamfering is inefficient and requires a skilled technique to chamfer uniformly over the entire length.

In particular, the dimensions and angles of stones used for tombstones are not very accurate, and the straightness of the corners is often distorted, making it extremely difficult to accurately chamfer stones under these conditions by hand. .

The purpose of this invention is to solve the above-mentioned problems by creating an automatic chamfering device that can automatically chamfer the corners of stone and can chamfer accurately even if the angle or straightness is distorted. Our goal is to provide the following.

[Means to solve the problem]

In order to solve the above-mentioned problems, this invention includes a clamp mechanism that holds and lifts a stone from both sides and rotates the stone at a predetermined angle around the clamped axis; The chamfering mechanism consists of a chamfering guide that rests on two adjacent surfaces along the axial direction of the stone, an elevating mechanism that moves this chamfering guide up and down, and a long flat plate on the chamfering guide. The chamfer guide is attached to the elevating rod of the elevating mechanism via a universal joint so as to be movable in one direction.

[Effect]

The stone clamped by the clamp mechanism is lifted and rotated, and with one corner facing upward, the lifting mechanism is activated and the chamfering guide is lowered, and this guide rests on two adjacent sides of the stone, The wrapping foil rotates along the guide and chamfers the corners of the stone.

The chamfer guide is attached to the rod of the lifting mechanism via a universal joint.
Since it is attached so that it can move freely, it adheres evenly to the two adjacent sides of the stone, allowing accurate chamfering even if the corners are not facing upwards or the straightness is distorted. can.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 3, rails 2.2 are laid in parallel on both sides of a base 1 on which stone is placed, and a chamfering device 3 and a polishing device 4 are installed on the top of the base 1. 2
It is arranged so that it can be moved freely along the

The chamfering device 3 is a traveling trolley 5 placed on a rail 2.2.
．． A guide shaft 6.6 is installed upright on the guide shaft 6.6, and a motor 7.7 provided on the guide shaft 6.6 drives the cart 5.5, and an external shaft is installed on both guide shafts 6.6 so as to be able to move up and down. A horizontal crosspiece 9 is installed between the fitted elevating cylinders 8.8, and the horizontal crosspiece 9 is moved up and down by a cylinder 10.10 provided on the traveling carriage 5.5.

The horizontal beam 9 includes a clamp mechanism 11 that clamps and lifts the stone A from both sides and rotates the stone A, and a chamfering mechanism 1 that chamfers the corners of the stone clamped by the clamp mechanism 11.
2 is installed.

The clamp mechanism 11 has a pair of arms 13 and 14 that protrude downward fixed to positions near both ends of the horizontal beam 9, and has a pressing cylinder 15 made of stone A at one lower end, and a receiving cylinder 16 at the other lower end. The press cylinder 15 has a press head 17 rotatably attached to the tip of the rod, and the cylinder 16 has a press head 17 attached to the tip of the rod that moves forward and backward. It is able to move and rotate.

The clamp mechanism 11 is mounted on the base 1),'? ! Both cylinders 15.16 extend at the position where the arms 13.14 fit around the stone A, and when the stone is clamped from both sides, the cylinders 10.10 extend and the horizontal beam S rises, and the stone A is Lift it up from base 1 and place the receiver on cylinder 1.
6, the stone material A is intermittently rotated so that each corner of the four circumferential surfaces is sequentially positioned directly above the stone material A.

Clamping of stone A by the clamp mechanism 11 is 1, stone A
It is necessary to clamp the stone at a position coaxial with the center line of the height and width, and rotate it with the center line as the center. A sensor is provided for detecting each of the centers, and the detection by this sensor causes the movement of the carriage 5.5 and the cylinder 10.
．． By controlling the vertical movement of the horizontal crosspiece 9 by the control circuit 10, the center line of the stone A and both cylinders 15 and 16 are controlled.
It is designed to match the centers of the

As shown in FIG. 10, the above sensors include a width detection sensor consisting of a light emitter X and a light receiver X' provided opposite to each other at the lower ends of both arms 13. It is made up of two sets with a detection sensor.

To clamp the center of stone A, first move the trolley 5.5 forward, and during this movement, the control circuit electrically detects the distance that the width detection sensor is interrupted by stone A, and then the above-mentioned Half of the distance is determined by the control circuit, and the cart 5.5 is moved backward by that amount, so that the axes of both cylinders 15.16 coincide with the center of the stone A in the width direction.

In addition, to detect the center in the height direction, after detecting the center in the width direction, the horizontal bar 9 that is waiting at the highest position is moved down to the lowering limit position, and during this descent, the height detection sensor detects the stone A.
The control circuit detects the distance from the position where the clamp mechanism 11 is cut off to the lower limit, and adds the distance from the lower limit position of the clamp mechanism 11 to the lower end surface of the stone, which has been input in advance, and adjusts the cylinder 10 so that the distance is half that. If the horizontal beam 9 is raised at step 10, both cylinders 15 and 16 will coincide with the center line of the width and height of the stone A.

Next, in the chamfering mechanism 12, as shown in FIG. is attached, and a wrapping foil mechanism 25 is attached to this chamfering guide 24.

The chamfering guide 25 is provided with inner upward slopes 2 on the lower surface of the horizontally long frame 26 on both sides along the longitudinal direction.
7.27 are arranged at right angles, and the pads 28.28 are attached to the double-sided slopes 27.27.

The chamfered guide 24 is attached to the piston rod 21 of the cylinder 22.
The universal joint 23 to be attached to the
A horizontal hole 30 along the width direction of the chamfered guide 24 is bored in the square shaft 29 fixed to the tip of the piston rod 21, and a square tube part 32 protruding from the upper surface of the downward U-shaped frame 31 is attached to the square shaft 2S. A square tube part 32 is attached to the square shaft 29 by a shaft 33 which is loosely fitted into the horizontal hole 30, and the middle of the chamfered guide 24 is fitted into the lower end of the U-shaped frame 31 and fixed with a bolt 34.

The chamfering guide 24 can swing freely around the shaft 33 in the longitudinal direction, and can swing freely in the width direction by the amount of clearance between the horizontal hole 30 and the shaft 33.
It is possible to move in the axial direction of the shaft 33 by a clearance amount of 2.

As shown in FIGS. 5 and 6, the wrapping foil mechanism 25 has a wrapping foil 37 attached to the downward output shaft 36 of the rotary drive machine 35, so that it can be freely moved in the longitudinal direction on the frame 26 of the chamfering guide 24. Slider 38 placed so that
When the frame body 26 is placed on the stone A with the rotating drive a35 fixed thereon, the wrapping foil 3 is placed against the corner a of the stone A.
7 is designed to grind a predetermined amount.

As shown in FIG. 6, in the wrapping foil mechanism 25, a rotary drive unit 35 is attached to a shaft 44 erected on a slider 38 with a nut 45 so that the position can be adjusted up and down. The amount of grinding can be adjusted.

Pulleys 39 and 40 are supported on the upper surface of both ends of the frame body 26, and both ends of a wire 41 wound between both pulleys 39 and 40 are connected to the slider 3, and the wires 41 are connected to one end of the frame body 26. A motor 42 for reciprocating the wrapping foil 37 is attached via the boot 1J39 and a wire 41, and the rotating wrapping foil 37 is moved in the longitudinal direction of the corner a, thereby chamfering the corner a. .

The frame body 26 has a universal joint as shown in FIG. A mint switch 43 is installed to detect when the frame body 26 overlaps the stone A, and a detection signal from this switch 43 stops the extension of the cylinder 22 and at the same time stops the rotation of the wrapping foil mechanism 25. It is designed to run both ways.

Next, the polishing device W4 is for polishing each surface of the stone material A after the chamfering process, and as shown in FIGS. .5
A guide shaft 52.52 is set upright on the guide shaft 52.5.
A motor 53.53 provided on the 2nd drive the cart 51.51, and a horizontal bar 54 installed on both guide shafts 52.52 so as to be movable up and down is movable up and down by a cylinder 55.55. A movable table 57 which is horizontally moved by a cylinder 56 is attached to the movable table 54, and a rotary drive machine 5S equipped with a chunk for detachably holding an abrasive material 58 is attached to the movable table 57.
This driving machine 59 takes out a predetermined abrasive material 58 from an abrasive material holder 60 and uses it.

Note that the wrapping foil mechanism 25 may have a plurality of types of wrapping foils lined up and attached along the moving direction so that the chamfering process can be performed successively with rough grinding, intermediate grinding, and polishing.

The automatic chamfering device of this invention has the above configuration,
Next, the chamfering method will be explained.

Ii+ stone A at a predetermined position on the base 1! 2, move the chamfering device 3 along the rail 2.2,
The center line of the stone in the width direction and the vertical direction is detected by the sensor, and both cylinders 15 and 16 of the clamp mechanism 11 are set to the center line.

In this state, both cylinders 15 and 16 of the clamp mechanism 11 are extended and clamp the stone A from both sides.
5.16 is extended, the horizontal beam 9 rises, and the stone A is lifted from the base 1.

In this raised position, the cylinder 16 is rotated by 45° and holds one corner of the stone in the uppermost position.

Next, the cylinder 22 is extended and the chamfering guide 24 is lowered, and the frame 26 is placed on the stone A as shown in FIG. The frame body 26 is positioned by the inclination angle of the pads 28 and 28.

When the frame body 26 is pressed onto the stone A by the cylinder 22, the limit switch 43 detects this, the cylinder 22 stops, the pressing state is maintained, and the ramping wheel mechanism 25, which waits at the leaving position, is activated. The ramping wheel 37 moves along the frame 26 while rotating, and the corner a of the stone A located within the frame 26 is ground and chamfered as shown in FIGS. 5 and 6.

During the above chamfering process, as shown in Figure 9, stone A
Because the precision of dimensions, angles, and straightness of each corner a is not high, corner a located at the top of stone A may be displaced to the left or right from the vertical line passing through the center line to the stone. be.

In this case, the frame 26 is connected to the cylinder 2 via the universal joint 23.
2, and is swingable in the longitudinal and width directions, so under the above conditions, the frame 26
The two adjacent surfaces of the stone material A are accurately followed and overlapped, so that the chamfering by the wrapping foil 37 can be accurately performed without being biased.

When the wrapping foil 37 reciprocates and returns to the standby position, the cylinder 22 contracts and the chamfering guide 24 rises,
The cylinder 16 that clamps the stone A rotates the stone A by 90 degrees and positions the next corner at the top.

Thereafter, when the cylinder 22 is extended and the chamfering guide 24 is lowered, and the frame body 26 is placed on two adjacent sides of the stone, the corner is chamfered by the rotation and reciprocation of the wrapping foil 37.

As mentioned above, every time one corner is chamfered, each corner is sequentially chamfered by the vertical movement of the chamfering guide 24 and the rotation of stone A by 90'' by the clamp mechanism 11. Become.

When chamfering of the four corners is completed, the clamp step groove 11 rotates the stone A by 45 degrees, and in this state, the cylinder 10.
10 contracts and lowers the stone material A onto the base 1, and when both cylinders 15 and 16 of the clamp mechanism 11 contract, the chamfering device 3 returns to the standby position.

Next, the polishing device 4 approaches the stone A and finishes polishing the upper surface of the stone A with the abrasive material 58.

In the polishing position, the clamping mechanism 11 of the chamfering device 3 may be used to lift and rotate the stone so that each surface of the stone A can be polished sequentially upward.

〔effect〕

As described above, according to the present invention, corners of stones can be chamfered automatically, and the chamfering work can be improved.

In addition, the chamfering guide that guides the wrapping foil is made swingable with a universal joint, so it is possible to improve the accuracy of corners, straightness, and dimension rings.
(The chamfering guide can be reliably aligned even with inaccurate stones, and the corners of the stones can be chamfered accurately.)

[Brief explanation of the drawing]

Fig. 1 is a side view of an automatic chamfering device and polishing device according to the present invention, Fig. 2 is a front view of the chamfering device, Fig. 3 is a front view of the polishing device, and Fig. 4 is an enlarged view of the main parts of the chamfering device. front view,
Figure 5 is an enlarged longitudinal sectional front view of the same chamfered state as above;
The figure is a longitudinal sectional side view of the same, Fig. 7 is an enlarged longitudinal sectional view showing the relationship between the chamfering device and the stone, Fig. 8 is a longitudinal sectional side view of the universal joint in the same, and Fig. 9 is the axis of the stone and the chamfering mechanism in the same. 1011D is a cross-sectional view of a sensor portion that detects the center of width and height. 1...Base stand, 2...Rail,
3... Chamfering device, 9... Horizontal crosspiece, 11
... Clamp mechanism, 12 ... Chamfering mechanism, 13.14 ...
Arm, 15... Press cylinder, 16... Receiver is cylinder, 22...; Cylinder, 23... Universal joint, 24... Chamfer Guide, 25...Wrapping foil mechanism, 26...
...Frame, 37...Wrapping foil.

Claims (1)

[Claims] (1) Consisting of a clamping mechanism that clamps and lifts a stone from both sides and rotates the clamped stone at a predetermined angle around the clamped axis, and a chamfering mechanism disposed directly above the clamping mechanism so as to be movable up and down; a chamfering guide in which the chamfering mechanism rests on two adjacent surfaces of the stone along the axial direction;
It is formed by a lifting mechanism that moves this chamfering guide up and down, and a wrapping foil attached to the chamfering guide so that it can freely move back and forth in the longitudinal direction.The chamfering guide swings through a universal joint to the lifting rod of the lifting mechanism. Automatic stone beveling device that can be installed freely.