JPH07144319A - Band saw for building stone - Google Patents

Abstract

PURPOSE:To provide a band saw of low device height which can carry out the winding of endless saw teeth and an accuracy-setting, and prevent the vibration of saw teeth due to the accumulation of cuttings. CONSTITUTION:Support housings 4 and 5 supporting pullies 2 and 3 for winding endless saw teeth 8 for free operation and a rotation driving device 12 for the pullies 2 and 3 are disposed on the positions lower than the winding position of the endless saw teeth 8, and the support housings 4 and 5 are fixed not to be lifted or lowered on a base 1 of a device so as to rotate the endless saw teeth 8 at a specific height, and a lifting mechanism 34 of a table 32 is provided. Preferably the lifting mechanism 34 of the table 32 is provided between the table 32 and a moving stand 23, and driving mechanisms 26 and 27 for driving horizontally the moving stand 23 in the direction crossing perpendicularly the hanging direction of the endless saw teeth 8 are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stone band saw for cutting a stone material by using an endless saw tooth provided with a cutting edge of a diamond sintered material or an endless saw tooth formed by a flat band metal having free abrasive grains as a tooth body. The present invention relates to a band saw having a structure in which a stone material is cut by vertically moving an endless saw tooth wound between two pulleys rotating around a vertical axis with respect to the stone material.

[0002]

2. Description of the Related Art A stone band saw having a structure in which an endless saw tooth wound around two pulleys that rotate around a vertical axis is moved up and down relative to a stone to cut the stone is disclosed in, for example, Japanese Patent Laid-Open No. 61-132305. Gazette and actual development Sho 63-20170
No. 7 publication. In a conventional stone saw band saw of this type, a support housing and a saw-tooth drive device are vertically mounted on two columns that are vertically provided, and the two support housings descend synchronously by a feed screw mechanism or the like. As a result, the endless saw teeth wound between the pulleys rotatably supported by the support housing are moved downward with respect to the stone material fixed at a fixed position for cutting.

In these conventional devices, the support housing of the pulley and the sawtooth drive mechanism are arranged above the pulley. That is, the pulley is provided so as to project downward from the support housing, and the endless saw teeth are wound around a position below the support housing of the pulley and the saw tooth drive device.

[0004]

However, in the device having the conventional structure, there is a problem that it is difficult to obtain accuracy during the setup work when the endless saw teeth are wound between the two pulleys. That is, in the conventional structure, in particular, the driven pulley is mounted via the two slide mechanisms of the vertical slide mechanism and the horizontal slide mechanism (tension adjusting mechanism), so the positional accuracy of the relationship between the two pulleys decreases, The supporting rigidity is lowered, and moreover, the endless sawteeth have to be wound from below the pulley, so that the workability is poor, and therefore it is very difficult to obtain accuracy during setup work.

Further, in the conventional apparatus, guide columns are provided upright on both sides of the apparatus, and a synchronous lifting mechanism for vertically moving the saw teeth is usually arranged above the columns, so that these members and pulleys are supported. There is a problem that the height of the device becomes very high because it is necessary to avoid interference with the housing and the like.

Further, in the stone band saw, a phenomenon in which powdery chips are accumulated on the upper surface of the pulley at the time of cutting, which causes imbalance in the pulley to cause vibration and reduces the smoothness of the cut surface. There was a problem.

The present invention has been made in order to solve the above problems, and can reduce the height of the device, and can easily and accurately wind the endless sawteeth around the pulley and work out its precision. An object of the present invention is to obtain a stone band saw that can be performed and that can prevent vibrations of pulleys and saw teeth due to the accumulation of chips.

[0008]

A stone band saw of the present invention is provided with support housings 4 and 5 and pulleys 2 and 3 for supporting freely rotatable pulleys 2 and 3 around which endless saw teeth 8 are wound.
Is provided at a position lower than the winding position of the endless saw teeth 8, and the support housings 4 and 5 are fixed to the base 1 of the device so as not to be lifted and the endless saw teeth 8 are rotationally driven at a constant height. And is provided with an elevating mechanism 34 for the table 32.

In the apparatus of a more preferred embodiment of the present invention, the lifting mechanism 34 of the table 32 is provided between the table 32 and the movable table 23, and the movable table 23 is in a direction orthogonal to the installation direction of the endless saw teeth 8. The horizontal movement mechanism 26, 27 is provided.

[0010]

In the apparatus of the present invention, the stone material 9 fixed to the table 32 is lifted at a constant feeding speed with respect to the endless saw teeth 8 rotating at a constant height, thereby cutting the stone material 9. According to the configuration of the present invention, it is not necessary to provide guide columns on both sides of the device, and the endless saw teeth 8 are wound around the uppermost part of the device, so that the device height can be made extremely low. Further, since the pulleys 2 and 3 are axially supported in a state of protruding above the support housings 4 and 5, the endless sawteeth 8 can be wound so as to be dropped from above the pulleys 2 and 3, which facilitates setup work. become. Moreover, since the vertical guide mechanism for moving the endless sawteeth 8 up and down is eliminated,
The relative positional accuracy and support rigidity between the two pulleys 2 and 3 are also increased, and it becomes possible to easily mount the endless saw teeth 8 with high positional accuracy and high rigidity.

Further, since the pulleys 2 and 3 are located at the uppermost part of the apparatus, it is possible to easily provide a conical cover 19 on the upper surfaces of the pulleys 2 and 3, and such a cover 19 allows the pulley 2 and 3 to be provided. Since the accumulation of chips on the upper surface of 3 can be prevented, the vibration caused by the unbalanced accumulation of chips can also be prevented, and the endless saw tooth 8 can be wound at an accurate position, and a smoother cut surface can be obtained. be able to.

[0012]

1 to 3 show an embodiment of the present invention. A base 1 of the device shown in the embodiment is a cross shape in a plane, and a support housing 4 of a drive pulley 2 and a support housing 5 of a driven pulley 3 are fixedly provided on the upper part of one of the opposite ends thereof. The drive pulley 2 is fixed to an upper protruding end of a drive pulley shaft 6 which is rotatably supported by two bearings (not shown) provided in the support housing 4. A V-belt pulley 11 is fixedly provided on the drive pulley shaft 6 between the drive pulley 2 and its support housing 4. The V-belt pulley 11 is provided with a V
The rotational force is transmitted by the belt 13.

On the other hand, the driven pulley 3 is rotatably supported by two bearings (not shown) in a bearing housing 16 supported via a tension slide 14 and a centering portion 15 provided on the upper end of the support housing 5. It is fixed to the upward protruding end of the driven pulley shaft 7. The tension slide 14 is configured to be driven in the left-right direction in FIG. 1 by a feed screw driven by a tension adjusting device 17, whereby the distance between the pulleys 2 and 3 is set and the pulley 2 and
Tension is applied to the endless sawteeth 8 wound between the three.

The pulleys 2 and 3 are fixed to the upper ends of the pulley shafts 6 and 7 by a fixture 18, and these pulleys 2 and 3 are fixed.
A conical pulley cover 19 is mounted on the upper surface of the above with the lower end circumference being bolted to the outer peripheral surfaces of the upper surfaces of the pulleys 2 and 3.

A rail 21 is provided on the base 1 in a direction orthogonal to the winding direction of the endless sawteeth 8 in a plane, and a wheel 22 rolling on this rail causes a moving table 23 to be orthogonal to the endless sawteeth 8. It is movably provided in the horizontal direction. Further, a rack 24 in a direction parallel to the rail 21 is fixed to the base 1 by a bracket 25. A pinion 27, which is rotatably driven by a servo motor 26, is mounted on the movable table 23, and the pinion 27 meshes with the rack 24.

A vertical guide rod 31 is erected on the movable table 23, and a sleeve 33 provided on a table 32 for fixing the stone material 9 is slidably fitted on the guide rod 31. Between the table 32 and the moving table 23,
A vertical hydraulic cylinder 34 is provided.

The apparatus of the embodiment shown in the figure is provided with two sets of a movable table 23 and a table 32, and a pair of endless saw teeth formed by winding a stone material 9 provided on each table around pulleys 2 and 3. The structure is such that both sides of 8 can be cut at the same time, but of course, a structure in which the base 1 has a plane T shape and only one table 32 is possible.

Next, the operation of the apparatus shown in the drawings will be described. The endless sawteeth 8 move the tension slide 14 to the drive pulley 2 side by the tension adjusting device 17, and
In the state where the space between the two is narrowed, the pulleys 2 and 3 are wound around from above, and the tension slide 14 is pulled by the tension adjusting device 17.
Is moved to the side of the non-driving pulley to apply a predetermined tension to the endless sawteeth 8 so that the endless sawteeth 8 are wound between the pulleys 2 and 3. At this time, if necessary, the driven pulley 3
By finely adjusting the position and inclination of the endless sawteeth 8, the endless sawteeth 8 are stretched between the pulleys 2 and 3 in an accurate position and posture.

The stone material 9 to be cut is placed on the table 32 by a crane or the like with the movable table 23 moved to the outside of the base 1. Stone 9 table 32
Fixation to the mortar is performed using a quick-drying mortar or the like. The stone material 9 is attached to and detached from the table 32 in a state where the table 32 is lowered.

After the stone material 9 is fixed to the table 32, the servo motor 26 is rotated to move the movable table 23 below the endless saw teeth 9, and the cutting position of the stone material 9 is set by controlling the rotation angle of the servo motor 26. To do.

When the position of the movable table 23 is set, the servo motor 26 is held, the drive motor 12 is driven to drive the endless saw teeth 9, and then pressure oil is supplied to the head end side of the hydraulic cylinder 34, Raise the table 32. The rising speed of the table 32 is set to a desired feed speed by controlling the flow rate of the pressure oil supplied to the cylinder 34. When the stone material 9 is small, after rapidly raising the table 32 until the upper end of the stone material 9 approaches the endless saw teeth 8,
Of course, control to switch to a predetermined feed rate is also possible.

When the stone material 9 is cut, the pressure oil supplied to the cylinder 34 is drained to lower the table 32, and the movable table 23 is moved from the bottom to the outside of the endless sawteeth 8 to be cut from the table 32. Remove the stone.

[0023]

According to the band saw for stone of the present invention described above, the endless saw teeth can be installed between the pulleys with high positional accuracy and high rigidity, and the vibration of the pulley and the saw teeth during cutting can be performed. Since this can be prevented, a cut surface with high smoothness can be obtained. Further, there is an effect that the work of constructing the sawteeth between the pulleys can be facilitated and the height of the device can be reduced.

[Brief description of drawings]

FIG. 1 is a side view of an apparatus according to an embodiment.

FIG. 2 is a plan view of the apparatus according to the embodiment.

FIG. 3 is a view of a portion A of FIG.

[Explanation of symbols]

 2 Drive pulley 3 Driven pulley 4 Support housing 5 Support housing 8 Endless saw tooth 9 Stone material 12 Motor 19 Cover 23 Moving stand 24 Rack 26 Servo motor 27 Pinion 32 Table 34 Hydraulic cylinder

Claims (2)

[Claims] 1. Two pulleys that rotate about a vertical axis
The endless sawteeth (8) wound between (2,3) are moved up and down relative to the stone (9) fixed to the table (32), and the stone (9)
In a stone band saw that cuts, the support housings (4,5) that support the pulleys (2, 3) so that they can rotate freely and the rotary drive device (12) for the pulleys (2, 3) have endless saw teeth (8). It is installed at a position lower than the winding position, and the support housing (4,5)
Is fixed to the base of the machine (1) so that it cannot move up and down and the endless sawteeth (8)
Is rotatably driven at a constant height and is provided with a lifting mechanism (34) for the table (32), a band saw for stone material. 2. The lifting mechanism (34) for the table (32) is provided between the table (32) and the moving table (23), and the moving table (23) is orthogonal to the installation direction of the endless saw teeth (8). Horizontal movement mechanism (2
The band saw for stones according to claim 1, further comprising: 6,27).