JPH0516054U - Saw blade holder for a thread saw - Google Patents

Abstract

(57) [Abstract] [Purpose] The attachment angle of the saw blade of the thread saw machine can be easily adjusted and can be set to an arbitrary angle. [Structure] A shaft portion 37a of a holder 37 is inserted into a hollow upper slide shaft 34. A peripheral groove 37b is formed on the outer peripheral portion of the shaft portion 37a. An O-ring 38, which is an elastic body, is fitted into the circumferential groove 37b and is pressed against the inner peripheral wall of the upper slide shaft 34. At this time, the pressing force of the O-ring 38 against the inner peripheral wall of the upper slide shaft 34 causes the holder 37 to move to the upper slide shaft 34 in a normal state (a state in which a slight rotational force is applied to the saw blade by cutting the curve, etc.). On the other hand, it is a force of a certain degree in which the rotation is restrained and is fixed. Further, this pressing force is easily applied to the holder 3 when a rotational force of a certain amount (for example, a large rotational force is artificially applied) is applied to the holder 37.
The force is such that 7 can be rotated with respect to the upper slide shaft 34.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a saw blade holder for a saw blade, and more particularly to a saw blade holder for a saw blade capable of adjusting an attachment angle with the longitudinal direction of the saw blade as an axis.

[0002]

[Prior Art]

 Generally, a thread saw machine in which a saw blade is reciprocated to cut a material to be cut is widely known.

In such a thread saw machine, there has been proposed one capable of adjusting a mounting angle of a saw blade (Jitsuko Sho 57-13202). This thread saw machine has a structure in which the mounting angle can be adjusted only at a preset angle.

[0004]

[Problems to be solved by the device]

 However, the above-described yarn saw machine has a problem that the mounting angle can be set only at a predetermined angle, and the desired angle cannot be adjusted.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a saw blade holder for a thread saw machine, which can set an attachment angle of the saw blade arbitrarily. And

[0006]

[Means for Solving the Problems]

 The present invention relates to a saw blade holder for a thread saw that holds both ends of the saw blade and has an adjustable mounting angle of the saw blade. The saw blade holder is a hollow slide that guides the reciprocating movement of the saw blade. A shaft and a holder that is inserted into the slide shaft at one end and holds the saw blade are provided. The holder rotates between the holder and the inner peripheral portion of the slide shaft in the slide shaft. An elastic body having a pressing force to prevent the above is interposed, and a retainer is provided to prevent the holder from coming out of the slide shaft; the retainer is the circumferential groove of the holder and the slide. It is characterized by a tapered C-ring that engages with the circumferential groove on the inner circumference of the shaft.

[0007]

[Action]

 When adjusting the mounting angle of the saw blade, rotate the holder with respect to the slide shaft. Then, the angle of the holder is adjusted at the desired position. At this time, the pressing force of the elastic body fixes the positions of the holder and the slide shaft.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view of a yarn saw machine according to the present invention. Reference numeral A in the figure denotes a base. FIG. 2 is an enlarged sectional view of the base portion A. Reference numeral 1 in the drawing is a base, and a table 3 is fixed to the base 1 by screws 2, 2, .... Two holding plates 4 and 4 are attached to the lower surface side of the upper plate portion 3a of the table 3. Further, on the lower surface side of the upper plate portion 3a, between the two holding plates 4 and 4, there are provided two sets of supporting members 5 and 5 arranged so as to face each other. Support arms 7a, 7a of the frame 7 are rotatably supported by the two sets of support members 5, 5 via fulcrum shafts 6, 6. The support arms 7a, 7a are provided with arm insertion holes 7b, 7b for inserting the arms 8. A motor 9 is attached below the support arms 7a, 7a in FIG. Holding arms 7d and 7d are formed on the left side of the support arm 7b on the left side of FIG. 2 and on the lower left side of the casing 7c in the figure. Holes 7e and 7e are formed in the holding arms 7d and 7d, and metals 11 and 11 are fitted in the holes 7e and 7e, respectively. A lower slide shaft 12 is inserted in the metal 11, 11 so as to be movable in the axial direction. A stop ring 13 is provided at the lower end of the lower slide shaft 12 in FIG. A coil spring 14 is interposed between the stop ring 13 and the metal 11, and the coil spring 14 constantly urges the lower slide shaft 12 downward in FIG. A lower blade holder 27 for holding the end of the saw blade 26 is provided at the upper end of the lower slide shaft 12 in FIG. On the other hand, a flywheel 15 is fixed to the end of the rotary shaft 9a of the motor 9 by a set screw 16. An eccentric shaft 15a is eccentrically formed on the left side of the flywheel 15 in FIG. 2, and one end of a link 17 is rotatably provided on the eccentric shaft 15a via a bearing 18. Further, a link pin 20 fixed to the lower slide shaft 12 via a bearing 19 is provided at the other end of the link 17. A cover plate 21 is fixed to the left ends of the holding arms 7d and 7d in FIG. 2 with screws (not shown). A leaf spring 22 is fixed to the cover plate 21 by screws 23, 23 (FIG. 3), and a protrusion 22a is formed on the leaf spring 22. The protrusion 22a is always attached to the holding plate 4. It is pressed to the left in FIG. 2 so as to abut. Further, in FIG. 3, the holding plate 4 is formed with an arc-shaped guide hole 4a. A bolt 24 fixed to the cover plate 21 in FIG. 2 is passed through the guide hole 4a, and a knob 25 is screwed into the bolt 24. By fastening the knob 25, the frame 7 is positioned and fixed. Further, as shown in FIG. 3, the holding plate 4 is provided with set holes 4b, 4b, 4b at appropriate places, and the projection 22a of the leaf spring 22 is engaged with the set hole 4b to position the frame 7. It is designed to be easy to do. On the other hand, one end of an arm 8 having a U-shaped side surface is fixed to the frame 7, and a slide holder 33 is fixed to the other end of the arm 8. As shown in FIG. 2, an upper slide shaft 34 is provided on the slide holder 33 via a metal 35 so as to be vertically movable in the figure. An upper blade holder 36 is provided at the end of the upper slide shaft 34. The upper blade holder 36 and the lower blade holder 27 hold the ends of the saw blade 26, so that the saw blade 26 is held by the yarn saw machine.

Hereinafter, the structure of the upper blade holder 36 will be described in detail. In FIG. 4, the shaft portion 37a of the holder 37 is inserted into the hollow upper slide shaft 34. The shaft portion 37a has a cylindrical shape, and a peripheral groove 37b is formed on the outer peripheral portion thereof. An O-ring 38, which is an elastic body, is fitted in the circumferential groove 37b and is pressed against the inner circumferential wall of the upper slide shaft 34. At this time, the pressing force applied to the inner peripheral wall of the upper slide shaft 9 by the O-ring 38 causes the holder 37 to slide upward under normal conditions (a state in which a slight rotational force is applied to the saw blade due to curving, etc.) The force is such that the rotation of the shaft 34 is restrained and the shaft 34 is fixed. Further, this pressing force can easily rotate the holder 37 with respect to the upper slide shaft 34 when the holder 37 is loaded with a certain amount of rotating force (for example, a large rotating force is artificially applied). It is a power of degree.

On the other hand, another peripheral groove 37c is formed on the base portion side (downward in FIG. 4) of the peripheral groove 37b of the shaft portion 37a. A stepped groove 34a is formed on the inner peripheral wall of the upper slide shaft 34 at a position that can be aligned with the peripheral groove 37c when the shaft portion 37a of the holder 37 is inserted. A tapered C-ring 39 is engaged between the stepped groove 34a and the circumferential groove 37c to prevent the holder 37 from falling off the upper slide shaft 34. Further, by using the tapered C-ring 39, the surface of the stepped groove 34a and the portion of the circumferential groove 37c that is locked at one end is improved.

A blade insertion hole 37d is formed at the tip of the holder 37, and a hollow portion 37e communicating with the blade insertion hole 37d is formed inside the holder 37. As shown in FIG. 4, the inner wall of the hollow portion 37e is formed with taper surface portions 37f, 37f facing each other so as to be narrowed downward in the figure. Further, knobs 40, 40 which are operation members are slidably brought into contact with the holder 37, and the two knobs 40, 40 are fixed to each other by screws 41, 41. Further, the knob 40 is formed with an elongated hole 40a extending in the left-right direction in FIG. 4 so as to face each other, and two cylindrical rollers 42, 42 rotatably supported in the elongated hole 40a. ing. The two rollers 42, 42 are housed in the hollow portion 37e of the holder 37, and have a configuration capable of abutting on the tapered surface portions 37f, 37f, respectively. Further, a coil spring 43 is interposed between the knob 40 and the upper slide shaft 34 to constantly urge the knob 40 downward in the figure. Then, the end of the saw blade 26 is placed between the two rollers 42, 42 supported by the knob 40, and the rollers 42, 42 are brought into contact with the tapered surface portions 37f, 37f by the downward urging of the knob 40, respectively. As a result, the rollers 42, 42 come into contact with the end of the saw blade 26 and the saw blade 26 is held.

The lower blade holder 27 also has a similar configuration, although detailed description thereof is omitted. The operation of adjusting the attachment angle of the saw blades 26 attached to the upper and lower blade holders 27 and 36 thus configured will be described.

That is, the operator picks the knobs 40 of the upper and lower blade holders 27 and 36 and rotates them in the direction of the arrow in FIG. At this time, since the holder 37 is held by the O-ring 38 with a pressing force that allows the holder 37 to rotate when a rotational force is applied to the upper slide shaft 34, the holder 37 rotates with respect to the upper slide shaft 34. In other words (FIG. 5), the mounting angle can be easily adjusted by stopping at the desired mounting angle. Further, during the cutting operation, the blade holders 27 and 36 reciprocate, but a large rotational force does not act on the holder 37, and the holder 37 is prevented from rotating by the pressing force of the O-ring 38.

FIG. 6 is a partially enlarged view showing a structure capable of positioning the mounting angle of the holder 37 at a predetermined position. The shaft 37a of the holder 37 is provided with a hole 37g in the radial direction at an appropriate position. A coil spring 44 is inserted in the hole 37g, and balls 45, 45 are attached to both ends of the coil spring 44. The coil spring 44 presses the balls 45, 45 to the outside of the shaft portion 37a. As shown in FIG. 6A, the upper slide shaft 34 has a plurality of recesses 34b, 34b, ... Formed therein so that the balls 45, 45 can be engaged with each other.

When the holder 37 is rotated, the balls 45, 45 are rotated until they come out of the recesses 34b, 34b and engage with the adjacent recesses 34b, 34b. The operator can confirm the positioning of the holder 37 by the click feeling at this time. Even in this case, the holder 37 is supported and fixed to the upper slide shaft 34 by the O-ring 38.

FIG. 7 is a partial sectional view showing another structure for positioning the holder 37. Two grooves 34c, 34c are formed at appropriate positions on the inner peripheral wall of the upper slide shaft 34 so as to face each other, and a long elastic body 46 is provided in the grooves 34c, 34c. The end surface of the shaft portion 37a of the holder 37 has a curved shape, and a flat cross groove 37h is formed in the head portion. The groove 37h is configured to be engageable with the elastic body 46.

When the holder 37 is rotated, the elastic body 46 bends upward in FIG. 7B, so that it is disengaged from the groove 37h and can be rotated. Further, the positioning of the holder 37 can be confirmed by a click feeling when the elastic body 46 is engaged with the groove 37h. Even in this case, the holder 37 is supported and fixed to the upper slide shaft 34 by the O-ring 38.

[0018]

[Effect of the device]

 According to the present invention, with the above-mentioned configuration, the attachment angle of the saw blade of the yarn saw can be set to a desired angle, and moreover, a reliable cutting operation can be performed at a desired position. In addition, it is possible to easily perform the work of adjusting the mounting angle.

[Brief description of drawings]

FIG. 1 is a side view of a yarn saw machine according to the present invention.

FIG. 2 is an enlarged cross-sectional view of a base portion of a yarn saw machine according to the present invention.

FIG. 3 is a front view of a yarn saw board according to the present invention.

FIG. 4 is a front sectional view of an upper blade holder according to the present invention.

FIG. 5 is a front sectional view of an upper blade holder according to the present invention.

FIG. 6 is a partially enlarged sectional view of an upper blade holder according to the present invention.

FIG. 7 is a partially enlarged sectional view of an upper blade holder according to the present invention.

[Explanation of symbols]

 34 ... Upper slide shaft (slide shaft) 26 ... Saw blade 37 ... Holder 38 ... O-ring (elastic body)

Claims (2)

[Scope of utility model registration request] 1. A saw blade holder of a thread saw machine, which holds both ends of the saw blade and is capable of adjusting a mounting angle of the saw blade,
This saw blade holder includes a hollow slide shaft that guides the reciprocating motion of the saw blade, and a holder that has one end inserted into the slide shaft and holds the saw blade. An elastic body having a pressing force for preventing the holder from rotating in the slide shaft is interposed between the peripheral portion and the peripheral portion, and a retainer for preventing the holder from coming out of the slide shaft is provided. A saw blade holder for a thread saw machine. 2. The saw blade holding tool of a yarn saw machine according to claim 1, wherein the retaining member is a tapered C ring that engages with the circumferential groove of the holder and the circumferential groove of the inner circumference of the slide shaft. Ingredient