JPS5837539Y2 - Gravity feed back band saw machine - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a band saw machine that utilizes gravity in the cutting feed and return mechanism of a workpiece to automatically feed and return the workpiece without using a new drive source.

Conventionally, a band saw machine that automatically cuts a workpiece has a cable that moves the workpiece for feeding and returning the workpiece.
In addition to the power that drives the bandsaw cutter, another power is used.

In addition, when a power-operated table finishes cutting the workpiece, it advances to a predetermined position and stops, so the operator has to move to the table and take out the finished object. .

In view of the above, this invention has been developed to create a gravity feed back system that does not require power to feed and return the workpiece, and does not require the operator to move to take out the workpiece after cutting. The purpose is to provide a band saw machine.

Next, this invention will be explained based on embodiments shown in the drawings.

In the figure, the bandsaw machine has one machine stand, and the front of machine stand 1 (
A pair of left and right wheels 2 are attached to the lower part (right side in FIG. 1), and a jack 3 is attached to the rear lower part of the machine base 1.

The pair of support columns 4, 4 have their upper portions inclined rearward at a predetermined angle, and their lower ends are attached to the machine base 1.

An angled support member 5 is fixed to one end of each column 4 near its center, and the lower end of this support member 5 is fixed to the machine base 1 at the rear of the lower end of the column 4. ing.

As shown in FIG. 3, the compatibility 4, 4 has a connecting member 6 attached to the top thereof for connecting the compatibility 4, 4, and this connecting member 6 has a drive motor driven by a drive motor M. Pulley 7 is attached.

A driven pulley 8 having the same diameter as the driving pulley 7 is rotatably attached to the connecting member 6 via a shaft 9 with a predetermined distance therebetween.

As described above, the driving pulley 7 and the driven pulley 8 attached to the connecting member 6 have approximately the same inclination angle as the support column 4.
An endless band of two cutters 10 is hung between the driving pulley 7 and the driven pulley 8.

In this way, since both pulleys 7 and 8 are inclined with respect to the vertical plane, the cutting surface of the saw cutter 10 hung on the pulleys 7 and 8 forms an angle (elevation angle) with respect to the horizontal plane. The blade 10a of the saw cutter 10 is directed forward.

The rocking table 11 has a substantially rectangular shape, and a pair of support plates 12, 12 are attached to both sides of the lower surface in the longitudinal direction so as to project downward.

The rocking table 11 is arranged between both supports 4, 4, and the support plates 12, 12 attached to the lower surface of the rocking table 11 are attached to the bearing members 13j3 attached to the upper surfaces of the support members 5, 5, respectively. It is pivotally mounted by a support shaft 14.

In this way, the rocking table 11 attached below the two band cutters 10 can swing in the direction in which the angle formed with the cutting surface of the two band cutters 10 changes.

A guide rail 15 consisting of a pair of rails is attached to the top surface of the rocking table 11 in the longitudinal direction thereof, and a suitable number of wheels 16 that roll on the guide rail 15 are mounted on the guide rail 15. A carriage 17 for moving the workpiece W is mounted thereon.

The carriage 17 is provided at its front end with a projecting piece 18 that projects from the front end, and at its rear end is a locking piece 19 having a hole 19a into which the tip of a pulling claw 20 (to be described later) is locked.
(See Figure 4).

A claw portion 20 bent upward at the tip (on the second cutter 10 side of the band)
The hook 20 having a shape a is swingably attached to a bracket 21 provided on the upper surface of the rear end of the swing table 11 by a pin 22.

There is a gap between this hook 20 and the racket 21.
A screw 23 is attached to the hook 23 to maintain a constant height of the hook portion 20a of the hook 20 from the swing table 11.

The locking rod 24 is fixed to the lower rear end of the rocking table 11,
A rod 24' identical to this locking rod 24 is attached to the lower front end of the rocking table 11.

In the rocking table 11 having the above configuration, the support plate 12 supported by the bearing member 13 via the support shaft 14 is attached to the rocking table 11.
Since the carriage 17 with the workpiece W attached to the upper part is located behind the center of gravity of the
No matter what position it is moved on 5, it rotates clockwise around the support shaft 14.

As shown in FIG. 6, the stopper member 25 has a round bar-shaped shaft 26, and the upper end of the shaft 26 is tilted rearward by approximately 90 degrees.
A stopper 26a is formed by bending.

Further, a conical locking pawl 27 is attached to the shaft portion 26 below the stopper 26a.

Further, in the stopper member 25, a rectangular weight portion 28 is fixed to the lower end portion of the shaft portion 26.

This weight portion 28 is swingably supported by a shaft 30 attached to a support 29 attached to the rear upper surface of the machine base 1.

As described above, the stopper member 25 supported by the support 29 is swingable in the front and back direction, and
Since the center of gravity of the weight portion 28 is located in front of the shaft 30, a clockwise rotational force is constantly applied to the weight portion 28.

Next, the operation of this embodiment will be explained.

The operator operates the jack 3 to adjust the inclination of the machine stand 1 and adjust the elevation angle of the band saw cutter 10.

Next, lift the front part of the rocking table 11 and rotate the rocking table 11 counterclockwise about the support shaft 14 so that the locking rod 24 at the front end touches the lower surface of the locking claw 27 of the stopper member 25. Let them come into contact with you.

The stopper member 25 is constantly rotated clockwise by the action of the weight portion 28, so that the locking claw 27 of the stopper member 25 is rotated clockwise by the action of the weight portion 28.
1 to stop the clockwise rotation of the rocking table 11.

In this way, the rocking table 11 supported by the stopper member 25 with its front end raised is moved by its guide rail 15.
The upper surface of the belt has the same inclination as the cutting surface of the two cutter 10.

Next, hook the claw 20a of the hooking claw 20 into the cap 17.
into the hole 19a of the locking piece 19 to hold the carriage 17 at the front end of the guide rail 15.

Next, the workpiece W is fixed to the carriage 17 by appropriate means, the motor M is started to operate the bandsaw cutter 10, and the hook 20 is rotated counterclockwise.
When the claw 20 and the carriage 17 are released, the carriage 17 descends on the inclined guide rail 15 due to its own weight and comes into contact with the two cutters 10 of the band.

The workpiece W is fed by the band saw cutter 1 while being fed by the weight of the carriage 17 and the weight of the workpiece W itself.
Cut by 0.

When the band saw cutter 10 finishes machining, the carriage 17 moves toward the guide rail 1 while increasing the speed compared to during cutting.
5, the protruding piece 18 at the tip collides with the upper part of the stopper member 25 that maintains the tilt of the rocking table 11, and rotates the stopper member 25 counterclockwise.

As a result, the locking rod 24 of the rocking table 11 and the stopper member 2
5 is disengaged from the locking claw 27, the rocking table 11 rotates clockwise around the support shaft 14, and stops when the locking rod 24 comes into contact with the stopper 26a of the stopper member 25. .

At this time, the rocking table 11 has a slope opposite to that during machining of the workpiece W, and a sufficient space is formed between the workpiece W and the two band cutters 10.

Thereby, the carriage 17 carrying the processed workpiece W passes under the bandsaw cutter 10 and retreats on the guide rail 15 to its original position.

When the carriage 17 retreats, the locking piece 19 presses down the claw 20a of the hooking claw 20 against the biasing force of the spring 23 and moves forward, so that the hole 20a is inserted into the hole 19a of the locking piece 19.
When the carriage 17 enters, the carriage 17 stops.

Therefore, the operator moves the cut workpiece W onto the carriage 1.
7 and attach the next workpiece to the carriage 17, lift the front part of the rocking table 11 and
By hooking the locking claw 27 of the stopper member 25 on the locking rod 24 at the rear end and then removing the hook 20 from the carriage 17, the next workpiece can be cut.

As mentioned above, this idea consists of a band saw cutter with a predetermined elevation angle driven by a pair of pulleys arranged horizontally with a predetermined elevation angle, and a band saw cutter with the center of gravity in front of the band saw cutter. A rocking table that is pivotally supported on a machine base below it with the same elevation angle as the elevation angle of this cutter and that can swing in a direction that changes the angle formed by the two cutters of the band, and a rocking table that is installed on the top surface of this rocking table. The carriage supports the workpiece and is movable back and forth with respect to the band saw cutter, and the oscillating table is tilted approximately parallel to the cutting direction of the band saw cutter, and after the workpiece is finished machining. has a stopper member that enables the rocking table to rotate forward and downward, a stopper that stops the rotation when the rocking table rotates forward and downward at a predetermined angle, and a carriage that can be attached and removed in front of the bandsaw cutter. By configuring the band saw machine with a hook that is engaged with the band saw, the following effects can be obtained.

(2) There is no need to use a drive source for cutting and returning the workpiece, and the workpiece can be sent back automatically.

■ The operator only needs to be located in front of the bandsaw machine, so
Multiple machines can be used.

■ When the workpiece has been processed, the rocking table tilts forward and downward, making it easy to take out and install the workpiece from a low position.

[Brief explanation of drawings]

The figures show one embodiment of this invention, in which Fig. 1 is a side view of the band saw machine before machining, Fig. 2' is a side view of the band saw machine after machining,
Fig. 3 is a view in the direction of arrow A in Fig. 1, Fig. 4 is a plan view of the carriage, Fig. 5 is an enlarged view of the hook part in Fig. 1, and Fig. 6 is a view of the stopper member part in Fig. 1. This is an enlarged view. 1... Machine base, 7... Drive pulley, 8...
...Driven pulley, 10... Band saw cutter, 11... Rocking table, 14... Support shaft, 1
5... Force idle rail, 17... Carriage, 20... Hook claw, 25...
Stopper member, 26 a... Stopper W...
...Work material.

Claims (1)

[Claims for Utility Model Registration] (a) A bandsaw cutter having a predetermined elevation angle and driven by a pair of pulleys arranged horizontally with a predetermined elevation angle. (b) The center of gravity is placed in front of the band saw cutter, and the machine is pivoted at the same elevation angle as that of the band saw cutter, and is pivoted in a direction that changes the angle formed with the band saw cutter. A movable rocking platform. (c) A guide rail provided on the top surface of the rocking table that guides the carriage for supporting the workpiece so as to be movable in the front and rear directions of the bandsaw cutter. (d) Engage with the rocking table to tilt the rocking table toward the front end approximately parallel to the cutting direction of the band saw cutter, and when the carriage collides with the rocking table after machining the workpiece, A stopper member attached to the machine base that releases the lock and allows the rocking base to rotate forward and downward. (E) A stopper that stops the rocking table from rotating forward and downward by a predetermined angle. (f) A hook that removably locks the carriage in front of the bandsaw cutter. A gravity feed-back band saw machine comprising: