JP3312262B2 - Frame structure of twin-screw circular saw machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame structure of a two-axis circular saw capable of reducing the required number of parts and reducing the size and weight of the whole machine.

[0002]

2. Description of the Related Art There is known a two-axis circular saw having a movable saw blade capable of moving vertically relative to a fixed saw blade and in the front-rear direction (Japanese Patent Laid-Open No. 1-249401). In this method, the moving saw blade is raised and moved forward, and the fixed saw blade and the moving saw blade are positioned in the same vertical plane, so that it is possible to grind a thick material, and the moving saw blade is retracted. By lowering and arranging them in parallel, it is possible to perform two-piece processing of thin materials.

[0003] The frame structure of this device includes a base frame, a fixed frame arranged on the upper surface of the base frame, for accommodating a fixed saw blade, and a rear surface of the fixed frame. A movable vertical frame, and a combination of a vertical frame mounted on the vertical frame and slidable back and forth with respect to the vertical frame, the moving saw blade is mounted on the vertical frame. .
The vertically moving frame is driven by an air cylinder, and the front and rear moving frame is driven by a ball screw shaft.

[0004]

However, the prior art has a problem that the structure of the entire frame is complicated, the number of required parts is large, and it is extremely difficult to reduce the size and weight. That is, since the vertical frame and the vertical frame need to move linearly with respect to the fixed frame and the vertical frame, respectively, the fixed frame and the vertical frame, and the vertical frame and the vertical frame, In addition to the need to interpose the base, the vertical moving frame is loaded with the total weight of the moving saw blade and the driving motor that drives it, in addition to the front and rear moving frame,
This is because an air cylinder for driving the vertically moving frame also needs to have an extremely high output.

SUMMARY OF THE INVENTION In view of the above-mentioned problems in the prior art, an object of the present invention is to reduce the number of required parts by mounting a movable saw blade on a swinging frame that swings up and down, and to reduce the overall size and size. It is an object of the present invention to provide a frame structure of a two-axis circular saw capable of reducing weight.

[0006]

According to the present invention, there is provided a base frame on which a fixed saw blade is mounted on a front portion of an upper surface, and a moving frame which is mounted on a rear portion of the upper surface of the base frame so as to be movable back and forth. And a box-shaped oscillating frame mounted on the moving frame and loaded with a moving saw blade at the lower front portion. The oscillating frame rotatably connects one side of the lower rear portion to the moving frame, and The gist of the present invention is to swing up and down between an ascending position in a horizontal posture and a descending downward position via an air cylinder installed upright.

[0007] An interlock mechanism is interposed between the base frame and the moving frame. The interlock mechanism prevents the moving frame from moving forward as far as the swinging frame is lowered. However, when the moving frame is at the forward limit, the lowering of the swing frame can be prevented.

Further, the moving frame can be driven via a ball screw shaft with an encoder.

[0009]

According to the structure of the present invention, the movable frame is mounted on the base frame so as to be able to move back and forth, and the swing frame is mounted on the movable frame so as to be able to swing up and down. The moving saw blade loaded on the, relative to the fixed saw blade loaded on the base frame,
By moving the moving frame back and forth, it can be relatively moved back and forth, and by swinging the swinging frame up and down, it can be relatively moved up and down. That is, the movable saw blade can be positioned in the same vertical plane with respect to the fixed saw blade by raising the swing frame and moving the movable frame forward, and moving the movable frame backward to lower the swing frame. By doing so, it can be arranged in parallel with the fixed saw blade. In addition, since the swing frame is rotatably connected to one side of the lower portion of the lower surface of the movable frame, the entire movable saw blade mounted on the lower portion of the lower surface is exposed to the outside, and the periphery of the fixed saw blade and the movable saw blade is exposed. There is no risk of inadvertently restricting the space for material feeding.

[0010] When an interlock mechanism is interposed between the base frame and the moving frame, the interlock mechanism can effectively prevent an accident that the moving saw blade accidentally contacts the fixed saw blade. it can. The interlock mechanism does not advance the moving frame to the forward limit when the swing frame is descending, and when the moving frame is at the forward limit,
This is because the lowering of the swing frame can be prevented, so that the moving saw blade does not move down to the forward limit and does not move down to the forward limit.

When the moving frame is driven via a ball screw shaft with an encoder, the encoder can measure the amount of movement of the moving frame before and after, so that the relative spacing between the fixed saw blade and the moving saw blade can be easily determined. Can be set automatically.

[0012]

Embodiments will be described below with reference to the drawings.

The frame structure of the two-axis circular saw comprises a combination of a base frame 10, a fixed frame 20, a moving frame 30, and a swing frame 40 (FIG. 1). The fixed frame 20 houses a fixed saw blade S1, and the swing frame 40 carries a moving saw blade S2.

The base frame 10 is a box-shaped frame (FIGS. 1 and 2). A pair of slide rails 11, 11 are laid in the front-rear direction on the upper surface rear portion of the base frame 10. The shaft 12 of the fixed saw blade S1 is provided on the front portion of the upper surface of the base frame 10 through bearings 12a, 12a.
And a fixed saw blade S1 is mounted. The shaft 12 projects from the front end of the base frame 10, and the fixed saw blade S1 is vertically fixed to the front end of the shaft 12 via couplings S1a, S1a and set screws S1b.
On the other hand, a pulley 12b is fixed to the rear end of the shaft 12, and the shaft 12 is connected to a drive motor (not shown) installed in the base frame 10 via a belt 12c wound around the pulley 12b.

The fixed frame 20 is a base frame 10
It is installed in front of. The fixed frame 20 is formed in a cover shape that covers the front part of the base frame 10,
The shaft 12 houses the fixed saw blade S1. However, the fixed saw blade S1 has a square hole 20 formed on the upper surface of the fixed frame 20.
The upper half protrudes from the upper surface of the fixed frame 20 via a. The fixed frame 20 is formed with steps 20b, 20b one step lower than the fixed saw blade S1. Conveyance rollers 21, 21... Are arranged in parallel with the steps 20b, 20b.

The moving frame 30 includes the base frame 10
It is mounted on the upper surface of the for free movement. Moving frame 3
Reference numeral 0 denotes a main body 30a formed in a box shape with an open top, and a vertically open protrusion 30b protruding from an upper front surface of the main body 30a.
On the lower surface of the main body 30a, corresponding to the slide rails 11 of the base frame 10,
Are attached (see FIGS. 2 and 3). Note that a shelf 30c is formed in the front-rear direction inside the main body 30a, and a wide inverted trapezoidal cutout 30d is formed upward on the front surface of the main body 30a. Also, two sets of four bearings 32 are fixed on the shelf board 30c.

The moving frame 30 includes a swing frame 40.
(See FIGS. 1 and 2).

The swing frame 40 is formed in a box shape having an open top surface that can be stored in the movable frame 30, and a triangular motor base 41 is protruded from a rear portion thereof. Further, legs 42, 42 are suspended from the lower surface of the motor base 41, and the tops of the legs 42, 42
Of the support pins 3 against the bearings 32, 32...
They are rotatably connected via 2a and 32a. On the other hand, inside the moving frame 30, brackets 33a,
An air cylinder 33 is provided upright via 33a (FIGS. 2 and 3), and a rod of the air cylinder 33 is connected to a connection bracket 43 vertically provided on the lower surface of the swing frame 40. Therefore, the swing frame 40 includes the legs 42, 42,
One side of the rear lower surface is rotatably connected to the movable frame 30 via the support pins 32a, 32a and the bearings 32, 32.
Can be swung up and down around support pins 32a, 32a penetrating through 2, 32,..., And the opposite side of bearings 32, 32,. Slanting downward position (two-dot chain line in the figure)
And can be taken.

At the front of the lower surface of the swing frame 40, a bearing 4
The shaft 44 of the moving saw blade S2 is provided via 4a and 44a. However, the moving saw blade S2 has a coupling S2a,
S2a is vertically attached to the front end of the shaft 44 via a set screw S2b. On the other hand, a pulley 44
The shaft 44 is fixed, and the shaft 44 is connected to a drive motor 45 with a pulley 45a installed on the motor base 41 via a belt 44c wound around the pulley 44b. The belt 44c vertically passes through a square hole 40a formed in the bottom of the swing frame 40. Therefore, the motor 45, the shaft 44, and the moving saw blade S2
Can be moved up and down, and can be moved up and down together with the swing frame 40 (solid line and two-dot chain line in FIG. 3).

A drive mechanism 50 is attached to side surfaces of the base frame 10 and the moving frame 30 to move the moving frame 30 back and forth (FIGS. 1 and 4). The driving mechanism 50 includes a servo motor 51 fixed to the side surface of the moving frame 30, a ball screw shaft 53 connected to the servo motor 51 via a belt 52, and a ball screw shaft 5.
And a screw member 54 screwed into the third member 3 as a main member.

The ball screw shaft 53 is rotatably supported by bearings 53a, 53a projecting from the side surface of the moving frame 30, and the screw member 54 is integrated with the base frame 10 via a bracket 54a. Has become.
Further, a ball screw shaft 53 is provided at the shaft end of the ball screw shaft 53.
Is connected to an encoder 53b for detecting the rotation amount. Therefore, if the servo motor 51 is rotated in the forward and reverse directions, the screw member 54 can be driven back and forth via the ball screw shaft 53. At this time, the moving frame 30 is relatively moved back and forth with respect to the base frame 10. Can be done. In addition, the encoder 53b can detect the amount of movement of the moving frame 30. However, moving frame 3
The forward limit of 0 is a position where the moving saw blade S2 is in the same vertical plane as the fixed saw blade S1 (solid line in FIG. 2), and the retreat limit is that the moving saw blade S2 is positioned at a predetermined distance behind the fixed saw blade S1. The position is set to the position retracted by the interval do (two-dot chain line in the figure).

An interlock mechanism 60 is provided on the rear surface of the moving frame 30 between the moving frame 30 and the base frame 10 (FIG. 5).

The interlock mechanism 60 includes a vertically long swinging lever 61 and a pin 62 disposed at an upper end of the swinging lever 61. The swing lever 61 is rotatable around a support pin 63 penetrating the intermediate portion, and the support pin 63 is supported by a bearing 63 a fixed to the rear surface of the moving frame 30. On the other hand, the pin 62 slidably penetrates a rear wall of the moving frame 30 and a bracket 62b attached to the inner surface thereof.
0 and a head of the pin 62, a compression spring 62a
Is interposed. An adjust bolt 64 is provided upright at a lower portion of the inner end surface of the swing lever 61 toward the rear surface of the movable frame 30.

A fixing block 65 is mounted on the upper surface of the base frame 10, and another adjusting bolt 65 a is erected on the fixing block 65 so as to correspond to the lower end of the swing lever 61. . However, it is assumed that the adjustment bolt 65a is positioned by the fixed block 65 so as to come into contact with the inner end surface of the swing lever 61 when the moving frame 30 advances to the vicinity of the advance limit.

When the movable frame 30 is sufficiently retracted and the adjustment bolt 65a is separated from the swing lever 61, the swing lever 61 has a compression spring 62a and a pin 62 at its upper end in the direction of arrow K1 in FIG. While being urged, the lower end is positioned by the adjustment bolt 64 abutting on the rear surface of the moving frame 30 and is stationary substantially parallel to the rear surface of the moving frame 30. The swing lever 61 can maintain this state until the movable frame 30 moves forward and the adjusting bolt 65a comes into contact with the inner end surface of the swing lever 61 (solid line in FIG. 5). At this time, the pin 62 has almost completely escaped in the direction of arrow K1 in FIG.
Therefore, the pin 62 does not interfere with the swing frame 40 inside the moving frame 30. Therefore, the swing frame 40 can swing up and down by expanding and contracting the air cylinder 33 (the solid line and the two-dot chain line in the figure).

When the moving frame 30 moves further forward, the adjustment bolt 65a pushes the lower end of the swing lever 61 (in the direction of the arrow K2 in the figure). Therefore, the swing lever 61
It rotates around the support pin 63 (two-dot chain line in the figure), and can push the pin 62 against the compression spring 62a (the direction opposite to the arrow K1 in the figure). Therefore, at this time, if the swing frame 40 is in the raised position, the pin 62
, The tip of which can enter below the swing frame 40 to prevent the swing frame 40 from descending. That is, the interlock mechanism 60 includes the swing lever 61, the pin 6
When the movable frame 30 advances to the vicinity of the advance limit via 2, the lowering of the swing frame 40 can be prevented thereafter, even when the movable frame 30 is at the advance limit.

When the swing frame 40 is lowered, the pin 62 cannot be pushed in by the swing lever 61 because its tip abuts on the rear surface of the swing frame 40. Therefore, the swing lever 61 at this time
With the pin 62 and the adjustment bolt 65a, the posture is kept unchanged, and the moving frame 30 cannot be moved forward. That is, when the swing frame 40 is descending, the interlock mechanism 60
Can be prevented from moving forward to the forward limit.

The operation of the circular saw machine is as follows.

Now, when the swing frame 40 is raised and the movable frame 30 is advanced to the forward limit, the movable saw blade S
Since 2 is located in the same vertical plane as the fixed saw blade S1 (solid line in FIG. 2), if the material W is supplied to the fixed saw blade S1 and the moving saw blade S2 in this state (in the direction of arrow A in FIG. 6). , Material W is
The fixed saw blade S1 and the moving saw blade S2 can grind simultaneously from above and below. However, the material W is advanced through the transport rollers 21, 21... Disposed slightly higher than the uppermost surface of the fixed frame 20, and the fixed saw blade S1 and the moving saw blade S2 are respectively shown in FIG. Arrow Ks1,
Drive in the Ks2 direction. At this time, the shaft 44 of the moving saw blade S2 is eccentric to the supply side of the material W by a distance x with respect to the shaft 12 of the fixed saw blade S1, and the cutting edge of the moving saw blade S2 is a fixed saw blade. Distance y1 to the edge of S1
Only overlap vertically.

Next, the moving frame 30 is moved a predetermined distance d1.
When the swing frame 40 is moved down by <do, and the swinging frame 40 is lowered, the moving saw blade S2 moves relative to the fixed saw blade S1 at a relative distance d.
They can be positioned one parallel apart. However, at this time, it is assumed that the cutting edge of the moving saw blade S2 protrudes from the lower surface of the material W by a small distance y2 (two-dot chain line in the same figure). Therefore, at this time, the fixed saw blade S1 and the moving saw blade S2 are used.
Can grind the material W at two positions at a time, and can perform two-piece machining. It is assumed that the material W at this time is thinner than the effective diameter y3 of the fixed saw blade S1 protruding from the upper surface of the conveying rollers 21, 21,... Irrespective of FIG. At this time, the relative interval d1 for determining the sawing width of the material W is determined by the moving frame 30.
Is equal to the retreat distance from the forward limit of Therefore, the drive mechanism 50 including the encoder 53b and the servomotor 51 moves the moving frame 30 backward by a predetermined distance according to a relative distance d1 set from the outside with the forward limit of the moving frame 30 as an origin, and moves the moving frame 30 to a predetermined position. Positioning can be stopped.

In the above description, the fixed frame 20
May be formed integrally with the base frame 10. In addition, both may be installed on a common base.

[0032]

As described above, according to the present invention, the base frame on which the fixed saw blade is mounted, the moving frame mounted on the base frame, and the moving saw blade mounted on the moving frame are mounted. By combining the swing frame with the swing frame, the moving saw blade can be moved back and forth by moving the movable frame back and forth, and can be moved up and down by swinging the swing frame. There is no need to provide a vertically moving frame that is driven via an air cylinder or slide base, thus greatly reducing the number of required parts, simplifying the whole, and significantly reducing the overall size and weight. There is an excellent effect that it can be achieved.

[Brief description of the drawings]

FIG. 1 is an overall perspective explanatory view.

FIG. 2 is a configuration diagram of a main part (1).

FIG. 3 is a main configuration diagram (2).

FIG. 4 is a main configuration diagram (3).

FIG. 5 is a configuration diagram of a main part (4).

FIG. 6 is an operation explanatory diagram

[Explanation of symbols]

 S1 ... fixed saw blade S2 ... moving saw blade 10 ... base frame 30 ... moving frame 33 ... air cylinder 40 ... swing frame 53 ... ball screw shaft 53b ... encoder 60 ... interlock mechanism

Claims (3)

(57) [Claims] 1. A base frame on which a fixed saw blade is mounted on a front upper surface, a movable frame mounted on the upper rear portion of the base frame so as to be movable back and forth, and a movable saw blade mounted on the movable frame and mounted on a lower front portion. The swing frame is rotatably connected to one side of the lower rear portion of the lower frame to the moving frame, and has a horizontal posture via an air cylinder installed upright in the moving frame. A frame structure for a two-axis circular sawing machine characterized by swinging up and down between a rising position and a diagonally downward moving position. 2. An interlock mechanism is interposed between the base frame and the moving frame, and the interlock mechanism moves the moving frame to a forward limit when the swinging frame is lowered. 2. The frame structure of a two-axis circular saw machine according to claim 1, wherein the swing frame is prevented from descending when the movable frame is at the forward limit. 3. The frame structure of a biaxial circular saw machine according to claim 1, wherein the moving frame is driven via a ball screw shaft with an encoder.