JPH0938904A - Fret sawing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fret sawing machine, in which a fret saw blade can simply be mounted and dismounted and, at the same time, a workpiece can easily be arranged at cutting out. SOLUTION: On a base 11, a driving mechanism 14 for driving a fret saw blade 15 is installed. A case 12, on the top surface of which a table 13 is arranged, is mounted on the upper part of the base 11. On the base 11, a stand 83, in which a guide hole is bored, is disposed in upright. Further, a supporter 82 having a guide pin is provided at the lower end of an arm 17 and, at the same time, the arm 17 is pivotally disposed in upright in the stand 83 through a spring 81. At the upper end of the arm 17, an upper clamping device 18 and a hold-down leg 85 are installed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn saw machine used for sawing a plate material such as a wooden board.

[0002]

2. Description of the Related Art A yarn saw machine includes an upper and lower clamping device that clamps both upper and lower ends of a yarn saw blade, a drive mechanism that drives the yarn saw blade,
It is composed of an arm that supports the upper clamping device, a table on which a workpiece is placed, and the like, and the thread saw blade can be attached and detached. When attaching the saw blade, first, the lower end of the saw blade is passed through a through hole provided in the table and clamped by the lower clamping device. Then, similarly, the upper end of the saw blade is clamped by the upper clamping device. When removing the yarn saw blade, the upper end of the yarn saw blade is removed from the upper clamping device, and then the lower end of the yarn saw blade is removed from the lower clamping device.

[0003]

However, when the lower end of the saw blade is clamped by the lower clamping device, the upper clamping device is located above the through hole of the table. However, there is a problem in that it interferes with the thread saw blade and is difficult to be clamped in the lower clamping device.

Particularly, when performing the hollowing process, after the lower end of the thread saw blade is clamped by the lower clamping device, the thread saw blade is inserted through the hole formed in the workpiece, and the thread saw blade is used as the upper clamping device. Although it is necessary to sandwich the workpieces, it is difficult to arrange the workpiece because the gap between the upper and lower sandwiching apparatuses is narrow.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a yarn saw machine in which a yarn saw blade can be easily attached and detached.

[0006]

In order to achieve the above object, in the invention of the yarn saw machine according to claim 1, the arm is rotatably supported at its base portion to provide a free arm function. is there.

According to the invention of the yarn saw machine described in claim 2, the arm is horizontally rotatable around the lower end thereof.
In the invention of the yarn saw machine according to the third aspect, instead of the structure in which the arm rotates, the structure in which the arm moves up and down is used as a free arm function.

According to the invention of the yarn saw machine described in claim 4, the structure for the free arm function is such that the stand for supporting the lower end of the arm, the urging means for urging the arm upward, and the arm in the use position. And locking means for stopping.

According to another aspect of the invention of the yarn saw machine described above, the upper and lower ends of the yarn saw blade are supported by the upper and lower clamping devices, respectively.
In a yarn saw machine in which the upper clamping device is provided at the tip of the arm,
The upper clamping device is rotatably supported with respect to the arm, and is provided with a free arm function.

Therefore, in the yarn saw machine according to the first aspect, the upper sandwiching device mounted on the arm moves as the arm rotates, and the yarn saw blade is attached and detached above the lower sandwiching device. Creates a large space for doing.

In the yarn saw machine according to the second aspect, the arm horizontally rotates about the lower end thereof, and a large space for attaching and detaching the yarn saw blade is formed above the lower clamping device. .

In the yarn saw machine according to a third aspect of the present invention, the distance between the upper clamping device and the lower clamping device becomes wider with the arm held at the upper part. In the yarn saw machine according to claim 4, the arm is biased by the biasing means and moves upward. Further, the locking means locks the arm in the upper and lower positions.

According to the fifth aspect of the present invention, by rotating only the upper clamping device, a large space is created above the lower clamping device.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) An embodiment of the present invention will be described below in detail with reference to the drawings.

As shown in FIGS. 1 to 4, the yarn saw machine of this embodiment comprises a base 11, a case 12 mounted on the base 11, and a table 13 arranged on the case 12. I have it. The drive mechanism 14 is the case 12
Mounted on the base 11 so as to be covered by
A lower clamping device 16 for removably clamping the lower end of the saw blade 15 is provided.

The arm 17 is erected on the base 11 and protrudes above the table 13. The upper clamping device 18 is attached to the tip of the arm 17, and the upper end of the thread saw blade 15 is detachably clamped to the upper clamping device 18. As a result, the yarn saw blade 15 is set in a vertical state between the two clamping devices 16 and 18. The drive mechanism 14 reciprocates the thread saw blade 15 to saw the workpiece 19 such as a plate material placed on the table 11.

As shown in FIG. 2, the base 11 is formed into a substantially flat plate shape by die casting of aluminum, and a plurality of support legs 22 are provided on the lower surface thereof so as to project. The mounting wall 24 is formed so as to project from the upper surface of the base 11.

The motor of the drive mechanism 14 is mounted on a mounting wall 24, and a drive pulley is mounted on the motor shaft thereof. The shaft support tube 32 is attached to the mounting wall 2 in front of the partition wall 25.
4, a rotary shaft 33 is rotatably supported at the center thereof via a pair of bearings 34. The driven pulley 35 is attached to the rotary shaft 33, and the driven pulley 35
A belt 36 is hung between the drive pulley and the drive pulley.

Lower clamping shaft 37 of the lower clamping device 16
Are supported on the base 11 via a guide tube 38 so as to be vertically movable. The lower clamp lever 39 is attached to the lower clamp shaft 37.
Is supported rotatably on the upper end of the lower sandwiching shaft 37 so as to sandwich the lower end of the saw blade 15 between and, and an operation knob 40 is provided at the distal end thereof so as to project forward. Spring 41
Is disposed between the lower clamping lever 39 and the lower clamping shaft 37, and urges the lower clamping lever 39 to rotate in the clamping direction of the saw blade 15. Then, the lower clamp lever 39 can be rotated by the operating knob 40 to clamp or release the lower end of the saw blade 15.

The drive pin 42 is provided so as to project on the outer periphery of the lower clamp shaft 37, and a crank 43 is interposed between the drive pin 42 and the rotary shaft 33. Then, the rotating shaft 33 is driven by the motor through the driven pulley 35 and the belt 36.
When the crank is rotated, the crank 43 and the drive pin 42
The lower clamping shaft 37 is moved up and down through the reciprocating motion, and the reciprocating motion is applied to the yarn saw blade 15.

As shown in FIGS. 1 and 2, the case 1
2 is made of plastic and formed into a substantially rectangular tube shape. Then, the case 12 is positioned and locked at a predetermined position with respect to the base 11 so as to cover the drive mechanism 14 on the base 11.

The table 13 is formed of plastic into a substantially flat plate shape, and a peripheral wall 72 is provided on the outer peripheral edge of the table 13 so as to project downward. The pair of protruding walls 73 and 74 are provided on the lower surface of the table 13, and a fitting groove 75 that can be fitted to the upper edge of the case 12 is formed between the protruding walls 73 and 74.

Prior to mounting the case 12 on the base 11, the fitting groove 7 of the table 13 is attached.
5 is fitted to the upper edge of the case 12, and the table 13 and the case 12 are fixed to each other.

Insertion hole 7 for inserting the arm 17
7 is formed on the upper surface of one side of the table 13, and the insertion hole 7
A reinforcing cylinder 78 is fitted and fixed to the unit 7. The through hole 79 is formed on the upper surface on the other side of the table 13. Through the through hole 79, the lower end of the saw blade 15 is attached to the lower clamping device 1 of the drive mechanism 14.
It is sandwiched by 6. The bulging portion 80 having a substantially semi-circular shape in plan view is formed on the front edge of the table 13 so as to correspond to the saw blade 15, and protrudes forward more than the front surface of the case 12. The bulging portion 80 widens the surface to be machined on the table 13, so that even when the workpiece 19 is large, the workpiece 19 can be held horizontally without being tilted forward.

As shown in FIG. 2, a cylindrical stand 83 is fixed to the upper surface of one side of the base 13, and the stand 8
An arm 17 is supported in the base 3 at its base end so as to be horizontally rotatable. The support 82 is fixed to the base end of the arm 17, and a guide pin 70 is provided on the outer periphery of the support 82 so as to project therefrom. As shown in FIG. 3, the guide pin 70 has a stand 83.
It is movable in the guide hole 71 which is transparently provided. The guide hole 71 has an inverted L shape and defines a horizontal rotation range and a vertical movement range of the arm 17. The horizontal rotation range of the arm 17 is 90 degrees. The spring 81 biases the arm 17 upward.

The housing 84 of the upper clamping device 18 is fixed to the tip of the arm 17. The presser foot 85 is the support rod 8
6 is attached to the housing 84 via 6 so as to be able to move up and down,
It is fixed to the housing 84 by a set screw 87 at a height position where it contacts the upper surface of the workpiece 19 on the table 13. The guide roller 88 is rotatably supported by the presser foot 85, slides on the spine of the thread saw blade 15, and guides the up and down movement of the thread saw blade 15.

The upper clamp shaft 89 is supported in the housing 84 so as to be vertically movable via a guide tube 90, and a push button 91 is attached to the upper end thereof. Spring 92 is push button 9
1 is interposed between the guide cylinder 90 and the upper holding shaft 89 is urged to move upward by the spring 92, so that the upper and lower holding shafts 89, 37 are mounted between the upper and lower holding shafts 89, 37. A predetermined tension is applied. When the upper clamp shaft 89 is moved downward by the push button 91 against the biasing force of the spring 92, the thread saw blade 15 is released from the tensioned state.

The upper clamping lever 93 is the upper clamping shaft 89.
The upper end of the upper sandwiching shaft 89 is rotatably supported so as to sandwich the upper end of the saw blade 15 between and, and an operation knob 94 is provided at the tip end thereof so as to project laterally. Spring 95
Is disposed between the upper clamping lever 93 and the upper clamping shaft 89, and urges the upper clamping lever 93 to rotate in the clamping direction of the saw blade 15. Then, by rotating the upper clamp lever 93 with the operation knob 94, the upper end of the saw blade 15 can be clamped or released.

Next, the operation of the yarn saw machine configured as described above will be described. As shown in FIG. 3, the arm 1 in which the upper clamping device 18 is located directly above the lower clamping device 16
7 is in use, the guide pin 70 has a guide hole 71.
It is located at the locking portion 66 at one end of and is moved upward by the spring 81. Therefore, the arm 17 is securely locked so as not to rotate. In this state, if the upper end of the saw blade 15 is released and the arm 17 is pushed downward against the spring force of the spring 81, the guide pin 70, that is, the arm 17 moves along the guide hole 71. be able to. When the arm 17 is rotated clockwise as shown by the chain double-dashed line in FIG. 4, the upper clamping device 18 and the presser foot 85 attached to the tip of the arm 17 are moved to the rear of the table 13. Then, above the through hole 79 formed in the table 13, the upper clamping device 18 and the presser foot 85 are provided.
Is not located, creating a large space.

After the lower end of the saw blade 15 is clamped by the lower clamping device 16, the arm 17 is rotated counterclockwise so that the guide pin 70 is locked by the locking portion 66 at the right end of the guide hole 71, and the arm 17 is moved. It is securely held in the use position. Therefore, the upper clamping device 18 and the presser foot 85 are arranged right above the lower clamping device 16, and the upper end of the saw blade 15 is clamped by the upper clamping device 18.

With the above construction, the yarn saw machine of this embodiment exhibits the following effects. (1) By rotating the arm 17, the upper clamping device 18 and the presser foot 85 can be moved to the rear of the table 13. Therefore, a large space is formed above the through hole 79, and the lower end of the saw blade 15 can be easily clamped to the lower clamping device 16 without the upper mounting device 18 and the presser foot 85 interfering. Further, by rotating the arm 17 and arranging it in the original position, the upper end of the yarn saw blade 15 can be easily clamped to the upper clamping device 18. Further, when removing the thread saw blade 15, the lower end of the thread saw blade 15 can be easily removed by removing the upper end of the thread saw blade 15 and then rotating the arm 17 in the clockwise direction.

(2) Since a large space is formed above the through hole 79 with the rotation of the arm 17 even during the hollowing of the workpiece 19, the hole formed in the workpiece 19 The saw blade 15 can be easily inserted therethrough. Therefore, the workpiece can be easily arranged.

(3) By disposing the guide pin 70 in the locking portion 66 of the guide hole 71, the arm 17 is urged upward by the spring force of the spring 81 and the arm 17 is securely held in the use position.

(4) The rotation angle of the arm 17 depends on the guide hole 7
It can be arbitrarily selected within the range of length 1. (5) Since the arm 17 retreats and rotates backward, the presser foot 8
5 is only separated from the saw blade 15. Therefore, when the arm 17 rotates, the presser foot 85 and the saw blade 15 do not interfere with each other.

(6) The arm 17 can be rotated by holding the arm 17 anywhere, and the rotating operation is easy. Next, another mode of the present invention will be described focusing on the part different from the first mode. (Second Mode) In the second mode, as shown in FIG. 5, the arm 17 is vertically lengthened and can be arranged in two positions, an upper position and a lower position. According to this structure, when the arm 17 is raised, a large space is formed above the through hole 79. Therefore, the same effect as the first embodiment can be obtained. (Third Mode) In the third mode, as shown in FIG. 6, the arm 17 is arranged on the right side surface of the case 12 so as to be able to fall down. With this configuration, the same effect as that of the first embodiment can be obtained. (Fourth Embodiment) In the fourth embodiment, as shown in FIG. 7, the arm 17 is fixed to the stand 83, and the upper clamping device 18 is rotatable left and right in a vertical plane with respect to the arm 17. It is supported. Even with this structure, the saw blade 1
The pinching / releasing work of 5 can be easily performed. Further, when performing the hollowing process, the work piece can be easily arranged. (Fifth Mode) In the fifth mode, as shown in FIG. 8, the arm 17 is fixed to the stand 83, and the upper clamping device 18 is rotatable around the arm 17 in the vertical plane. It is supported. Even with this structure, the saw blade 1
The pinching / releasing work of 5 can be easily performed. Further, when performing the hollowing process, the work piece can be easily arranged.

The present invention can be modified and embodied as follows. (1) In the first embodiment, the guide holes 71 have different lengths. With this configuration, the arm 17
The rotation angle of can be changed.

(2) In the second embodiment, the arm 17 is vertically movable and rotatable about the insertion hole 78. With this structure, the upper clamping device 18
Also, since the presser foot 85 can be moved to the rear of the table 13, the work of pinching and releasing the thread saw blade 15 can be further facilitated, and the work piece 19 can be easily arranged during the hollowing process.

(3) In the first to third embodiments, the saw blade 1
After mounting 5, the arm 17 is configured to be fixed with a screw. With this structure, the arm 17 is securely fixed.

[0039]

Since the present invention is constructed as described above, it has the following effects. According to the first aspect of the present invention, by moving the arm, a wide space is formed above the lower holding device, and the work of holding and removing the yarn saw blade can be easily performed. Further, when performing the hollowing process, the work piece can be easily arranged.

According to the second aspect of the invention, if the upper clamping device is moved to the rear of the table, the upper clamping device can be easily attached and detached without interfering with the upper clamping device. You can Further, when performing the hollowing process, the work piece can be easily arranged.

According to the third aspect of the present invention, by moving the upper clamping device upward, a wide space is formed above the lower clamping device, and the thread saw blade can be easily attached and detached. You can Further, when performing the hollowing process, the work piece can be easily arranged.

According to the fourth aspect of the invention, the arm can be reliably fixed when the yarn saw machine is used. According to the fifth aspect of the present invention, by rotating only the upper clamping device, a wide space is formed above the lower clamping device, and the saw blade can be easily attached and detached. Further, when performing the hollowing process, the work piece can be easily arranged.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a yarn saw machine of the present invention.

FIG. 2 is a sectional view of the yarn saw machine.

FIG. 3 is a side view showing a stand.

FIG. 4 is a plan view showing a yarn saw machine.

FIG. 5 is a side view showing another embodiment.

FIG. 6 is a side view showing another embodiment.

FIG. 7 is a front view showing another embodiment.

FIG. 8 is a side view showing another embodiment.

[Explanation of symbols]

13 ... Table, 15 ... Yarn saw blade, 16 ... Lower clamping device,
17 ... Arm, 18 ... Upper clamping device, 19 ... Workpiece,
66 ... Locking portion, 70 ... Guide pin as locking means, 7
1 ... Guide hole, 81 ... Spring as biasing means, 84 ... Housing.

Claims (5)

[Claims] 1. A yarn saw machine in which upper and lower clamping devices are respectively supported by upper and lower clamping devices and an upper clamping device is provided at the tip of an arm, in which the arm is rotatably supported at its base. A thread saw machine with an arm function. 2. The yarn saw machine according to claim 1, wherein the arm is horizontally rotatable around its lower end. 3. A structure in which the arm can be moved up and down as a free arm function instead of the structure in which the arm rotates.
Or the yarn saw machine described in 2. 4. The structure for the free arm function includes a stand that supports the lower end of the arm, a biasing means that biases the arm upward, and a locking means that locks the arm in the use position. The yarn saw machine according to any one of 1 to 3. 5. A yarn saw machine in which upper and lower clamping devices are respectively supported by upper and lower clamping devices and an upper clamping device is provided at a tip of an arm, the upper clamping device being rotatable with respect to the arm. A thread saw machine that supports and gives a free arm function.