JPH0319721A - Sawing machine - Google Patents

Abstract

PURPOSE:To eliminate the need for the work of fixing a circular saw to a main shaft by providing a movable bonding member which bonds the main shaft and circular saw integrally with its operation by a centrifugal force when the main shaft is rotated together with the circular saw in the space of the main shaft and the shaft hole of the circular saw. CONSTITUTION:A movable bonding member 9 is interposed with a loose gap inside the groove 7 of a main shaft 1 and the groove 8 of the boss 4 of a circular saw 3 during the low speed rotation or stoppage of the main shaft 1 and the interval of each circular saw 3 can be easily be changed with its free movement along a key 2. After adjusting the interval of each circular saw 3, the main shaft 1 is rotated in an arrow mark direction, then the movable bonding member 9 of between the grooves 7, 8 is moved to the external part by the centrifugal force, the member 9 is press-fitted to the bottom face of the groove 8 and the main shaft 1 and circular saw 3 are integrally bonded. Consequently the work of fixing the circular saw to the main shaft becomes unnecessary and the efficiency in the stripping work of a material can be improved.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a material sawing machine.

[Conventional technology]

Conventionally, each circular saw of a saw machine using a plurality of circular saws is fitted with a cylindrical positioning spacer onto a main shaft driven by a motor, and each circular saw is mounted in a fixed position by tightening a nant.

[Problem to be solved by the invention]

In the conventional saw machine as described above, when changing the cutting width of a material, the operation of the machine is first stopped, and then the nant is loosened and the spacer and circular saw are removed from the main shaft along with the nut.

Then, a spacer for the desired cutting width is selected, a circular saw is fitted with the spacer on the king shaft, and then tightened with a nut, which is extremely time-consuming and requires a long period of machine downtime when making changes. There was a problem that the rate decreased.

It also requires a large number of spacers with different dimensions,
There was also the problem that the troublesome selection and management required time and effort.

An object of the present invention is to solve the above-mentioned problems of conventional saw machines and to provide a saw machine that can easily and quickly adjust the spacing between circular saws.

Ca! Means for Solving the Problems] In order to solve the above problems, the present invention provides a circular saw that rotates with the main shaft and is movable in the axial direction, and a circular saw is provided between the main shaft and the shaft hole of the circular saw. To provide a saw machine provided with a movable coupling member that is actuated by centrifugal force when the main shaft rotates together with the circular saw to integrally connect the main shaft and the circular saw.

In addition, a movable coupling member is interposed between an axial groove provided on the main shaft and a groove on the inner circumference of the circular saw, and when the main shaft rotates together with the circular saw, centrifugal force causes the movable coupling member to move in the axial direction of the circular saw. A movable coupling member is attached to a part near the inner circumference of a circular saw so that it can be freely moved, and when the main shaft rotates together with the circular saw, centrifugal force causes a part of the movable coupling member to move. is crimped onto the main shaft to prevent the circular saw from moving in the axial direction, or a plurality of circular saws are provided that are free in the rotational and axial directions with respect to the main shaft, and each circular saw has a , a saw machine equipped with a one-way clutch that has the function of fixing the circular saw to the main shaft when the circular saw tries to rotate in the opposite direction to the rotational direction of the main shaft, and a radial direction between the circular saw and the main shaft. A movable coupling member that moves in the axial direction and does not move in the axial direction is provided, and when the main shaft rotates, the movable coupling member presses against the circular saw by centrifugal force, thereby integrally coupling the main shaft and the circular saw. A hollow annular body filled with liquid is provided on the inner periphery of each circular saw, and a movable member that protrudes into the hollow annular body is slid into a guide tube provided on the inner peripheral wall of the circular saw by the centrifugal force generated when the circular saw rotates. When the movable member is inserted movably into the hollow annular body and protrudes into the hollow annular body due to centrifugal force, the inner circumferential wall is elastically deformed and pressed against the outer periphery of the main shaft, thereby coupling the main shaft and the circular saw. We also offer

[Effect]

This invention has the above structure, and when changing the cutting width, each circular saw is moved relative to the main shaft while the main shaft is rotating at a low speed or is stopped, and the desired spacing is achieved.

After each circular saw is moved at a predetermined interval as described above, when the main shaft is rotated at high speed, the circular saw rotates at high speed together with the main shaft, and the movable coupling piece rotating at the same time moves outward due to centrifugal force, causing the main shaft and circular saw to rotate at high speed. Fix the saw together.

In the device according to claim (2), when the main shaft is rotated at high speed together with the circular saw after adjusting the interval between the circular saws, the movable coupling member takes a posture of coupling the circular saw and the main shaft, and the main shaft and the circular saw are rotated. join together.

In the apparatus according to claim (3), when the main shaft starts rotating at high speed after adjusting the position of the circular saw, a part of the swingable movable coupling member is crimped to the main shaft to connect the main shaft and the circular saw. do.

In the apparatus according to claim (4), when the main shaft is stopped and the crank is idle, each circular saw is positioned, and then the main shaft is rotated at high speed. The circular saw rotates as one.

According to claim (5), when the main shaft of the circular saw is rotated at high speed after position adjustment, each movable coupling member moves in the radial direction while rotating together with the main shaft and is crimped to the circular saw, thereby connecting the circular saw and the main shaft. Join.

According to claim (6), when the main shaft is rotated at high speed after adjusting the position of the circular saw, the inner circumferential wall is elastically deformed due to liquid compression and rise when the movable coupling member protrudes into the hollow annular body due to centrifugal force. and press it onto the outer periphery of the main shaft to connect the main shaft and the circular saw.

[Embodiment J In the first embodiment shown in FIGS. 1 to 3, reference numeral 1 denotes a main shaft of a saw machine (not shown), and a key 2 is fixed to the outer periphery of the main shaft 1.

Reference numeral 3 designates a plurality of circular saws, the central part of which is a thick-walled post 4, and a key groove 5 on the inner periphery of this boss 4 is slidably engaged with the key 2, whereby the circular saw 3 is connected to the main shaft 1. The shaft rotates with the shaft and is movable in the axial direction.

Another groove 7 is provided on the main shaft 1, and a groove 8 is provided on the inner periphery of the post 4, facing the groove 7.

Reference numeral 9 in FIGS. 1 to 3 denotes a movable coupling member, which is shaped like a rectangular bar and has a groove with an appropriate gap. , 8.

In the embodiment described above, the movable coupling member 9 is idle within the grooves 7 and 8 when the main shaft 1 is rotating at a low speed or is stopped.

Therefore, since each circular saw 3 can freely move along the key 2, the interval between the circular saws 3 can be easily changed.

After adjusting the spacing between the circular saws 3 in this way, the main shaft 1 is
When rotated in the direction of the arrow in the figure, the movable coupling member 9 between the grooves 7 and 8
is moved outward by centrifugal force, and the member S is pressed against the bottom surface of the groove 8, so that the main shaft 1 and the circular saw 3 are integrally connected.

Although the key 2 is used in the above embodiment, the key 2 may not be used because it is also possible to rotate the circular saw 3 and the main shaft 1 together using only the movable coupling member 9.

In the second embodiment shown in FIG. 4, a recess 10 is provided on the side surface of a boss 4 of a circular saw 3, and a movable coupling member 11 is in the form of a cam, which is swingably mounted within the recess 10 by a pin 12. It is something that

In this embodiment, a weight 1 is attached to the side of the member 11 in order to generate rotational force in the member 11 due to centrifugal force.
3 is provided, and a spring 14 is provided to push the outside of this weight 13, so that the member 11 is separated from the outer periphery of the main shaft 1 when the main shaft 1 is rotating at a low speed or is stopped.

In the case of the above embodiment, the interval between the circular saws 3 can be freely changed with respect to the main shaft 1 while the main shaft 1 is rotating at a low speed or is stopped.

After adjusting the spacing between the circular saws 3 as described above, when the main shaft 1 is rotated in the direction of the arrow in FIG. 4, the centrifugal force acting on the weight 13 causes the member 11 to rotate in the direction of the arrow against the spring 14. , the main shaft 1 and the circular saw 3 are integrally coupled.

FIGS. 5I and 5 to 6 show the third embodiment.

This embodiment is the same as the second embodiment in that movable coupling members 11 are attached to four locations 10 on the side surface of the boss 4 of the circular saw 3, but in this third embodiment no pins are used. .

That is, in this embodiment, recesses 10 are provided on both sides of the boss 4 of the circular saw 3, and a housing portion 25 is provided on the inner periphery of the post 4 at the recess 10.

The member 11 has a U-shaped cross section with pieces 27 on both sides of the thick part 6. The thick part 6 is fitted into the housing part 25, and the pieces 27 are fitted into the recesses 10 on both sides.
Attach to.

A chevron-shaped protrusion 28 is provided on the outside of the thick portion 6 mentioned above. Furthermore, if a weight 13 is provided as shown by the chain line, the centrifugal force can be increased, but this weight 13 may be omitted.

Assuming that the center of gravity of the member 11 is G in Fig. 5 (■), when the member 11 rotates at high speed together with the main shaft 1, the corner 34 of the member 11 becomes a fulcrum due to centrifugal force, and moves in the direction of the arrow in Fig. 5 (■). As it rotates, the outer protrusion 28 of the thick portion 6 presses against the inner surface of the housing portion 25, thereby joining the main shaft 1 and the circular saw 3 together.

Further, when the main shaft 1 is rotating at a low speed or is stopped, centrifugal force does not act on the member 11.

Therefore, since the outer protrusion 28 of the thick wall portion 6 is separated from the inner surface of the accommodating portion 25 as shown in FIG. 5, the position of the circular saw 3 can be changed freely.

The fourth embodiment shown in FIGS.
9 are in contact. In the case of this embodiment, while the main shaft 1 is stopped, the movable coupling member 11 is rounded because the lower surface (including the corner 34) of the member is in contact with the outer peripheral surface of the main shaft 1 due to the weight of the member. Moving saw 3 becomes heavy.

Furthermore, when the main shaft 1 rotates at a low speed, the outer protrusion 28 of the thick part 6 of the member 11 comes into contact with the inner surface of the accommodating part 25 due to a slight centrifugal force and becomes heavy. The movement of the circular saw 3 is facilitated by suppressing the action of centrifugal force during rotation and floating the protrusion 28 from the inner surface of the housing portion 25.

The rest of the structure is the same as the third embodiment shown in FIGS. 5 and 6.

Also, in this case, the center of gravity of the member 11 is located at G in Figure 7
Therefore, when the main shaft 1 rotates at high speed, the centrifugal force of the member 11 overcomes the pressing force of the bar 29, and it rotates outward about the corner 34 as a fulcrum, as shown by the arrow H in FIG. Projection 2
8 is crimped onto the inner surface of the housing portion 25 to connect the main shaft 1 and the circular saw 3 together.

FIGS. 8 to 11 show the fifth embodiment.

In this embodiment, the boss 15 consists of left and right ring-shaped members 16 and 17, as shown in FIG.
, 17 sandwich both sides of the center part of the circular saw 3, insert the cylindrical part 18 on one side of the inner circumference of the member 17 into the center hole of the circular saw 3 and the ring-shaped member 16 as shown in FIG. Libet 1
- or the like, to be integrally connected to the circular saw 3.

In addition, recesses 1S and 20 are provided in parts of both outer surfaces of both the members 16 and 17, and four recesses 19 and 20 are provided on the inner circumference of the cylindrical portion 18.
An axial groove 21 corresponding to 0 is provided. Reference numeral 22 denotes a movable coupling member, which has a weight 23 at one end and a locking piece 24 at the other end, and the weight side of the upper surface is a slope.

The above-mentioned connecting member 22 is a groove 2 inside the boss 15 of each circular saw 3.
1 and then insert the main shaft 1 into the boss 15.

When the main shaft 1 is stopped or rotating at low speed in this state, the inner periphery of the coupling member 22 and the outer periphery of the main shaft 1 are parallel as shown in FIG. can be done freely.

When the positioning of each circle 1ii3 is completed and the main shaft 1 is rotated at high speed, each circular saw 3 and the connecting member 22 also rotate,
The member 22 is tilted as shown in FIG. 11H by the centrifugal force of the weight 23, and the inner side of the locking piece 24 is pressed against the outer periphery of the main shaft 1, thereby connecting the circular saw 3 and the main shaft 1.

The sixth embodiment shown in FIG.
The operation of the second embodiment is the same as that of the fifth embodiment.

That is, in this sixth embodiment, when the main shaft 1 is stopped or rotating at low speed, both coupling members 2 are connected as shown in FIG. 12I.
Since the inner circumference of the circular saws 2 and the outer circumference of the main shaft 1 are parallel, each circular saw 3 can be freely moved in the axial direction.

When the positioning of each circular saw 3 is completed and the main shaft 1 is rotated at high speed, each circular saw 3 and both coupling members 22 also rotate, and both members 22 are caused by the centrifugal force of each weight 23 as shown in FIG.
Since the upper surfaces of both coupling members 22 are pressed against the lower surfaces of the ring-shaped members 16 and 17, and the lower surfaces of both coupling members 22 are pressed against the outer periphery of the main shaft 1, the circular saw 3 and the main shaft 1 are connected. .

The seventh embodiment shown in FIGS. The locking piece 24 is not necessary.

In this seventh embodiment, as in the sixth embodiment, when the main shaft 1 is rotating at low speed or stopped, the inner circumference of the coupling member 22 and the outer circumference of the main shaft 1 are parallel as shown in FIG. Circular saw 3
can be freely moved in the axial direction.

When the positioning of each circular saw 3 is completed and the main shaft 1 is rotated at high speed, each circular saw 3 and the connecting member 22 also rotate, and the member 22 is moved by the centrifugal force of the weight 23 to the pin 35 as shown in FIG. 13H. Since the two surfaces of both coupling members 22 are pressed against the lower surfaces of the ring-shaped members 16 and 17, and the lower surfaces of both coupling members 22 are pressed against the outer periphery of the main shaft 1, the circular saw 3 and the main shaft 1 are Join.

In the case of this seventh embodiment, the pair of coupling members 22 can be held parallel to the main shaft 1 by the pin 35.

In the eighth embodiment shown in FIGS. 14 and 15, a one-way clutch 8 is attached to the inner periphery of each circular saw 3.

One of the illustrated examples, Clasochi A, is provided with a plurality of recesses 31 in a ring 30 fixed to the inner periphery of a post 4 of a circular saw 3, and each of the recesses 3
1, and each ball 32 is pushed in the loosening direction by a spring 33.

In this case, the main shaft 1 rotates at a low speed or stops, and the ball 32
is located deep in the recess 31, each circular saw 3 can freely move on the main shaft 1.

In this state, each circular saw 3 is positioned, and then the main shaft 1 is
When the circular saw 3 is rotated at high speed in the direction of the arrow in FIG. 5, the crutch A fixes the circular saw 3 to the main shaft 1.

Note that the one-way clutch A may be of any shape other than the illustrated example, such as a rectangular shape.

16 and 17 show a ninth embodiment, in which an axially long tan arc-shaped movable coupling member 38 is attached to the outside of the main shaft 1, and this member 38 and the main shaft 1 are connected to a key groove 39 provided in the main shaft. The groove 40 on the inner circumference of the member 38 is coupled to the fixed key 41 so as to rotate together with play in the inner and outer directions, and the inner circumferential surface 42 of the boss 4 of each circular saw 3 is aligned along the outer circumference of the coupling member 38. and can move freely.

In this ninth embodiment, when the main shaft 1 is rotating at a low speed or is stopped, a gap is created between the outer circumference of the member 38 and the inner circumferential surface 42 of the circular saw 3, as shown in FIG. is in a state where it can freely move along the outer periphery of the member 38.

After positioning the circular saw 3 and rotating the main shaft 1 at high speed,
At the same time, the coupling member 38 also rotates, and the member 38 moves outward due to centrifugal force and presses its outer periphery to the inner circumferential surface 42 of the boss 4 of each circular saw 3, thereby connecting the circular saw 3 via the member 38. Main shaft 1
Since the circular saw 3 is integrally connected to the main shaft 1, the circular saw 3 rotates together with the main shaft 1.

In the ninth embodiment, when the movable coupling member 38 is provided only on one side as shown in FIG. 16, a balance weight (not shown) is provided on the opposite side. However, when there are two or more =15 I6 members 38, the balance weights are not required by arranging the members 38 symmetrically or at equal intervals.

In the tenth embodiment shown in FIGS. 18 and 19, a screw cylinder 48 is screwed into screw holes provided at appropriate intervals on the outer periphery of the main shaft 1 and fixed, and a pole-shaped connection is made inside the screw cylinder 48. The member 49 is fitted so that it can move freely, and the outer end of the threaded cylinder 48 is bent slightly inward by caulking or the like to prevent the member 49 from coming off, and a part of the member 49 protrudes from the outer periphery of the main shaft 1. It is designed to do so.

Also, like the other embodiments, the key 41 attached to the main shaft 1
is slidably engaged with the key lock 47 inside the boss 4.

In the case of the tenth embodiment, when the main shaft 1 is rotating at a low speed or is stopped, each member 49 is not pressed against the inner circumferential surface 50 of the boss 4, so the circular saw 3 can move freely.

When the main shaft 1 starts rotating at high speed, each member 49 is pressed against the inner circumferential surface 50 of the boss 4 by centrifugal force, thereby fixing the circular saw 3 to the main shaft 1.

In the case of this 10th embodiment, as is clear from FIG. 19,
The position can be adjusted within the range where the member 49 contacts the inner circumferential surface 50 of the boss 4.

The eleventh embodiment shown in FIG. 20 is the same as the tenth embodiment except that a coil spring 51 is inserted into the threaded cylinder 48 of the tenth embodiment to prevent the member 49 from being pulled in too much. Only the different parts are shown because they exist.

In this embodiment, as in the tenth embodiment, when the main shaft 1 is rotating at low speed or stopped, each member 4S is attached to the spring 51 as shown by the solid line.
The position of the circular saw 3 is adjusted in this state.

Thereafter, when the main shaft 1 is rotated at high speed, each member 49 protrudes as shown by the chain line due to centrifugal force and is pressed against the inner peripheral surface 50, thereby coupling the main shaft 1 and the circular saw 3.

The twelfth embodiment shown in FIGS. 21 and 22 uses liquid.

In this case, a hollow annular body 57 consisting of an annular member 55 having an outward-opening U-shaped cross section on the outer periphery of the main shaft 1 and a rigid lid 56 fixed to the outer periphery of the main shaft 1 is slidable, and a key 65 is used to move the main shaft 1 The circular saw 3 is fixed to the outer periphery of the iI56.

The inner circumferential wall 58 of the annular member 55 is elastically deformable, and a plurality of guide cylinders 59 are integrally provided at appropriate positions on the C circumferential wall 58 and project into the annular body 57, and the movable member 60 is slid within the guide cylinders 59. It is inserted movably, and has collars 61 and 62 on both ends.
to prevent it from falling off.

The inner circumferential wall 58 is provided with a recessed portion 63 into which N62 is fitted, and an O-ring 64 is attached to the inner circumference of the guide tube 59 to maintain liquid tightness.

Then, the hollow annular body 57 is filled with a liquid such as hydraulic oil.

In the twelfth embodiment described above, the inner surface of the inner peripheral wall 58 is separated from the outer periphery of the soil shaft 1 when the main shaft 1 is rotating at a low speed or when it is stopped.

Therefore, the interval between the circular saws 3 can be adjusted freely.

When the interval adjustment of the circular saw 3 is completed and the main shaft 1 is rotated at high speed, each movable member 60 moves outward due to centrifugal force and its end protrudes into the hollow annular body 57, so that the liquid in the annular body 57 is The pressure increases, but since the lid 56 is a rigid body and the inner circumferential wall 58 is elastically deformable, hydraulic pressure is applied to the inner surface of the inner circumferential wall 58 as indicated by the arrow in FIG.

Therefore, the inner circumferential wall 58 is elastically deformed and pushed out toward the main shaft 1, and is pressed against the outer circumferential surface of the main shaft 1 to couple the main shaft 1 with the inner peripheral wall 58.

〔Effect of the invention〕

As described above, in this invention, since the plurality of circular saws that rotate together with the main shaft are movable in the axial direction with respect to the main shaft, it is extremely easy to adjust the intervals between the circular saws.

In addition, a movable connecting member was installed between the main shaft and the circular saw, which is activated by centrifugal force when the main shaft rotates with the circular saw, and connects the main shaft and the circular saw together, so the spacing between each circular saw can be adjusted. Afterwards, when the main shaft is rotated, the main shaft and the circular saw are automatically joined together, so there is no need to fix the circular saw to the main shaft, and the efficiency of sawing and splitting of materials is significantly improved.

19 20 On the other hand, when the main shaft is stopped, the crank is idle, so the spacing between each circular saw can be adjusted freely.
When the main shaft begins to rotate, the crass joints are connected to fix each circular saw to the main shaft, so that the same effect as provided with a movable coupling member can be obtained.

Furthermore, an annular member filled with liquid is provided on the inner periphery of each circular saw, and the inner peripheral wall of this annular member is elastically deformable, and a movable member is inserted into a guide tube provided on the inner peripheral wall. Due to the increase in liquid pressure caused by the protrusion of the movable member into the liquid during rotation, the inner circumferential wall presses against the outer periphery of the main shaft and connects the circular saw to the main shaft, making the connection and separation of the main shaft and circular saw extremely smooth. There are effects such as being exposed.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing a first embodiment of the device of the present invention, FIG. 2 is a longitudinal side view of the main part of the same, and FIG. 3 is a partially cutaway longitudinal side view enlarging a part of the same. Fig. 4 is a partially cutaway longitudinal side view of the second embodiment, Fig. 5 1, ■ is a partially cutaway longitudinal side view of each state of the third embodiment, and Fig. 6 is a partially cutaway transverse front view of the same. , Fig. 7 I, ■ are partially cutaway longitudinal side views of each state of the fourth embodiment, Fig. 8 is a partially cutaway longitudinal side view of the fifth embodiment, and Fig. 9 is a partially cutaway top view of the same. , Fig. 10 is an exploded perspective view of the main parts, Fig. 11 1, ■ is an enlarged vertical side view explaining the function of the main parts, Fig. 12 I, ■ is a partially cutaway longitudinal cross-section of each state of the sixth embodiment. The front view, Figures 13 (■ and 2) are partially cutaway vertical front views of each state of the seventh embodiment, Figure 14 is a longitudinal sectional side view of the main part showing the eighth embodiment, and Figure 15 is a part of the same as above. An enlarged partially cutaway vertical side view, FIG. 16 is a longitudinal side view of the ninth embodiment, FIG. 17 is a partially cutaway front view of the same, and FIG. 18 is a longitudinal side view of the tenth embodiment. Fig. 19 is a partially cutaway longitudinal front view of the same as above, Fig. 20 is a partially longitudinal side view of the 11th embodiment, Fig. 21 is a longitudinal side view of the 12th embodiment, and Fig. 22 is a main part of the same as above. It is an enlarged vertical front view. 1... Main shaft, 2... Key 3.
...Circular saw, 7, 8...Groove, 9,
11, 22, 38, 49...Movable coupling member, 5
7...Hollow annular body, 58...Inner peripheral wall, 5
9... Guide tube, 60... Movable member, A... One side clutch. 23 Kuni No. 221!1 153

Claims (6)

[Claims] (1) The saw machine is equipped with a circular saw that rotates with the main shaft and is movable in the axial direction, and between the main shaft and the shaft hole of the circular saw, the main shaft is operated by centrifugal force when the main shaft rotates with the circular saw. A saw machine equipped with a movable connecting member that integrally connects the main shaft and circular saw. (2) The movable coupling member is interposed between the axial groove provided on the main shaft and the groove on the inner circumference of the circular saw, and when the main shaft rotates together with the circular saw, the movable coupling member is moved by centrifugal force to the circular saw. 2. The saw machine according to claim 1, wherein the saw machine is configured to take a posture that prevents axial movement. (3) The above-mentioned movable coupling member is swingably attached to a part near the inner circumference of the circular saw, and when the main shaft rotates together with the circular saw, a part of the above-mentioned movable coupling member is crimped to the main shaft by centrifugal force, causing the circular saw to The saw machine according to claim 1, wherein the saw machine is configured to prevent axial movement of the saw machine. (4) A saw machine is provided with a plurality of circular saws that are free in the rotational direction and axial direction with respect to the main shaft, and each of these circular saws has a plurality of circular saws that are free to rotate in the opposite direction to the rotational direction of the main shaft. A saw machine equipped with a one-way clutch that has the function of fixing the circular saw to the main shaft when (5) In a saw machine, a plurality of circular saws are provided that are movable in the axial direction relative to the main shaft, and a movable coupling member that moves in the radial direction but does not move in the axial direction is provided between the circular saws and the main shaft. When the movable coupling member rotates, the movable coupling member is pressed against the circular saw by centrifugal force, thereby integrally coupling the main shaft and the circular saw. (6) A saw machine is provided with a plurality of circular saws that rotate together with the main shaft and are movable in the axial direction, a hollow annular body filled with liquid is provided on the inner periphery of each of the circular saws, and a hollow annular body is provided on the inner circumferential wall of the hollow annular body. A movable member that protrudes into the hollow annular body due to the centrifugal force generated when the circular saw rotates is slidably inserted into the guide tube. A saw machine in which the inner circumferential wall is elastically deformed and press-fitted to the outer periphery of the main shaft to connect the main shaft and the circular saw.