JPH08252801A - Rightward and leftward leaning type sawing device - Google Patents

Abstract

PURPOSE: To realize the positioning of a rocking arm at three angles by a single operating pin. CONSTITUTION: By three stoppers 40, 42 and 48 formed on a supporting member, the rocking arm 6 is adjusted at the rightward rocking limit angle, the leftward rocking limit angle of a saw blade and the angle, at which the saw blade is normal to its supporting surface. An operating pin 52 equipped on the rocking arm 6, under the state energized by elastic force, abuts against three stoppers 40, 42 and 48. in order to perform the operation for moving against the energizing direction, the abutting against the neutral stopper 42 is avoided. Or the abutting against the neutral stopper 42 is avoided by performing the moving operation of the operating pin 52 against the direction energizing the operating pin 52 under the condition that the operating pin 52 abuts against either one of the tree stoppers 40, 42 and 48 under neutral state. For this, the rocking arm 6 can be positioned at the above-mentioned three angles by a single operating pin 52.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a saw device in which a saw blade can be tilted in a left-right direction with respect to a support member for supporting a material to be cut.

[0002]

2. Description of the Related Art The structure of a conventional left-right tilting saw device is disclosed in Japanese Utility Model Laid-Open No. 5-49301 and Japanese Patent Application Laid-Open No. 6-71602. Of these, the left and right tilt type saw device described in JP-A-6-71602 is shown in FIGS. 1 to 3. In these figures, the support member 4 is provided with a support surface 4a for supporting the material to be cut. Further, the swing arm 6 is configured to be swingable with respect to the support member 4 in the left-right direction, that is, in the directions of arrows L and R shown in FIG. Further, the saw blade 12 is attached to the swing arm 6 via the vertical swing member 10 and the slide bar 8. The blade surface of the saw blade 12 is inclined following the swing of the swing arm 6. The motor 14 shown in FIGS. 2 and 3 is a drive source that drives the saw blade 12.

1 to 3, the supporting member 4
Is a turntable rotatable with respect to the base 2, but there is also a type in which the support member 4 is fixed. A slide bar 8 and a vertical swing member 10 are provided between the saw blade 12 and the swing arm 6 shown in the figure.
Without the slide bar 8, the swing arm 6 has a vertical swing member 1
There are also types in which 0 is attached, and types in which the saw blade 12 is attached to the slide bar 8 without the vertical swinging member 10. Further, the saw blade 12 may be directly attached to the swing arm 6. In the last type, the material to be cut is fed over the support surface.

Regardless of the type, the left and right tilt type saw device, as shown in FIG. 3, follows the swing of the swing arm 6 and causes the saw blade 12 to tilt to the left side in the drawing with a left tilt angle 12L,
It can swing between a neutral angle 12C orthogonal to the support surface 4a and a right inclination angle 12R that is inclined to the right in the drawing.

At these three angles (left tilt angle 12L, neutral angle 12C and right tilt angle 12R), the swing arm 6
5493 is a technology for reliable positioning of
No. 01 publication. This technique is realized by using two independent stoppers. That is, normally, a stopper for positioning at the left inclination angle 12L and the right inclination angle 12R is used to incline to the left and right, and the neutral angle 1
Upright by a stopper for positioning at 2C.

[0006]

However, in the conventional technique, two stoppers are required, so that the structure is complicated and the cost is increased. Further, when positioning at the neutral angle, if the operator does not support the swinging arm in a free state, the operator falls down by its own weight. The present invention has been made in view of such points, and its problems are
The swing arm can be positioned by one operation pin at the above three corners, and the cost can be reduced. Further, another problem is to prevent the swing arm from falling down without supporting the swing arm at the time of positioning at the neutral angle.

[0007]

According to a first aspect of the present invention, there is provided a support member having a support surface for supporting a material to be cut, and a support member in a lateral direction with respect to the support member. A left-right tilting saw device including a swingable swing arm, a saw blade that can tilt in the left-right direction following the swing of the swing arm, and a drive source that drives the saw blade, The support member has three stoppers, a pair of left and right stoppers that regulate the left swing limit angle and the right swing limit angle of the saw blade, and a neutral stopper that regulates the saw blade at an angle orthogonal to the support surface. Is formed, the swing arm is provided with one operation pin that is biased in a predetermined direction by an elastic force, and the operation pin is in a state of being biased by the elastic force. Occasionally, the direction in which the three stoppers come into contact and are urged When the anti to perform an operation of moving the operating pin a structure in which contact between the neutral stopper is avoided.

[0008]

According to the first aspect of the invention, the swing arm can be moved to the left swing limit angle, the right swing limit angle, and the saw blade by the three stoppers formed on the support member. Is restricted to an angle perpendicular to the support surface. One operation pin provided on this swing arm contacts three stoppers when being biased by elastic force, and is neutral when performing an operation to move against the biased direction. Contact with the stopper is avoided. That is, in a natural state, the operation pin contacts one of the three stoppers, and the saw blade can be adjusted to a predetermined swing angle with respect to the support surface according to the contacting stopper. Further, since the contact with the neutral stopper is avoided by performing the operation of moving the operation pin against the biased direction, it is possible to swing between the stoppers. It is easy to form this structure, and the number of parts can be reduced, so that the cost can be reduced.

[0009]

A second aspect of the present invention is the invention according to the first aspect, wherein the support member has a side on which the operation pin abuts against the neutral stopper. Is provided in proximity to the opposite side, and is provided with a restriction portion that restricts the swing of the operation pin.

[0010]

According to the second aspect of the present invention, the swinging of the operation pin is restricted by the restricting portion provided on the support member. Therefore, even if the swing arm is not fixed, it does not fall down. Therefore, even if an inadvertent operation is performed, the rocking arm does not fall down, and it is possible to protect the rocking arm itself, devices provided on the rocking arm, and the like.

[0011]

A third aspect of the present invention is the invention according to the first aspect, wherein the supporting member is provided with the elastic member in the direction biased by the elastic force. The operating pin includes a sliding contact section in sliding contact with the guide surface and a non-sliding contact section in which the operating pin does not slide in contact with the guide surface, and when the operating pin is in a state of being biased by the elastic force, An operation to move the operation pin from the non-sliding contact section to the non-sliding contact section is possible, but the transition from the non-sliding contact section to the non-sliding contact section is prohibited, and the operation pin is moved against the biased direction. When performing the above, the sliding contact section and the non-sliding contact section can be moved to each other.

[0012]

According to the invention of claim 3, the operation pin swings while slidingly contacting the guide surface in the sliding contact section,
In the non-sliding contact section, it swings without any sliding contact. With this configuration, when the operation pin is urged by the elastic force, the transition from the sliding contact section to the non-sliding contact section is possible, but the transition from the non-sliding contact section to the sliding contact section is prohibited. .
On the other hand, when the operation pin is moved against the biased direction, the sliding contact section and the non-sliding contact section can be moved to each other. Therefore, in order to adjust the swinging arm to a desired swinging angle, it is sufficient to operate the operation pin at most once. Further, the transition from the sliding contact section to the non-sliding contact section can be performed without operating the operation pin. Therefore, it becomes possible to easily position the swing arm while minimizing the number of times the operation pin is operated.

[0013]

An embodiment of the present invention will be described below with reference to the drawings. First, a first embodiment will be described. The overall structure of the first embodiment is almost the same as that of the left-right tilting saw device shown in FIGS. That is, the support member 4
A turntable is used as the swing arm 6
The slide bar 8 and the upper oscillating member 10 are interposed between the blade and the saw blade 12. However, the following two points are different from the left-right tilting saw device shown in FIGS. 1 to 3. That is,
As shown in FIG. 4, the swing arm 6 is provided with an operation pin 52 that is biased by a spring in the depth direction (the right direction in the drawing in FIG. 4). Further, as will be described later in detail, the saw blade 12 is moved at a predetermined swing angle (for example,
The support member 4 is provided with a plurality of stoppers for adjusting the angle to the horizontal plane of the turntable such as 90 degrees and ± 45 degrees.

Next, the link structure of the support member 4 and the swing arm 6 will be described with reference to FIG. In FIG. 5, a shaft 34 serving as a swing center is cantileveredly fixed to a rear end portion 4e of the support member 4. Also, the support member 4
A cylindrical wall portion 4c surrounding the shaft 34 is formed at the rear end portion 4e, and the shaft 3 is provided at the rear end surface of the wall portion 4c.
A circumferential guide surface 4b that is concentric with 4 is formed. A circumferential guided surface 6a is formed in sliding contact with the circumferential guide surface 4b. Bosses 6c and 4d to be inserted into the shaft 34 are formed on the base portion of the swing arm 6 and the wall portion 4c of the support member 4, respectively. The swing arm 6 can swing about the shaft 34 as a swing center by the members formed in this way.

A screw 26 is formed at the end of the shaft 34, and a nut 24 is screwed onto the screw 26 via a washer 28. Further, the nut 24 is fixed to the shaft portion 22 of the handle 20 with a screw 50 so as not to rotate. here,
When the handle 20 is rotated in one direction, the nut 24 advances to the right in the drawing. By the forward movement of the nut 24, the washer 28 is pressed against the rear surface of the swing arm 6, and finally the guided surface 6a is pressed against the circumferential guide surface 4b. Therefore, the position of the swing arm 6 with respect to the support member 4 can be fixed. On the other hand, when the handle 20 is rotated in the opposite direction, the pressure contact state between the guided surface 6a and the circumferential guide surface 4b is alleviated, so that the swing arm 6 can swing again.

Next, the internal structure of the base portion of the swing arm 6 will be described with reference to FIGS. Figure 5
In the above, the swing arm 6 is formed with a fixed portion 6 d extending along the shaft 34, and the fixed portion 6 d follows the swing of the swing arm 6. A protective ring 32 is fitted on the shaft 34, and a spring 30 is attached around the protective ring 32.

Further, as shown in FIG. 6, one leg extending from the spring 30 contacts the contact piece 4f and the contact surface 6d1 of the fixed portion 6d as the swing arm 6 swings. Similarly, as shown in FIG. 8, the other leg extending from the spring 30 contacts the contact piece 4g and the contact surface 6d2 of the fixed portion 6d as the swing arm 6 swings.

Returning to FIG. 5, the swing arm 6 is provided with a stepped hole 6b. This hole 6b has a lid 54
The operation pin 52 is inserted therethrough. The operation pin 52 has a retaining ring 58 that is hooked on the step 6b1 of the hole 6b. Since the spring 56 is fitted between the lid 54 and the retaining ring 58, the operation pin 52 is biased rightward in the drawing by the elastic force of the spring 56. Therefore,
The operation pin 52 does not come out of the hole 6b unless the lid 54 is removed.

Here, in the left-right tilt type saw device, when used at the left tilt angle 12L, the neutral angle 12C and the right tilt angle 12R, it is required that the angle with the saw blade 12 be an accurate angle. Therefore, as shown in FIGS. 6 to 8, the wall portion 4c of the support member 4 has three stoppers 40, 42, 48.
Is provided. Each of the stoppers 40, 42 and 48 is a holding bolt, and the saw blade 12 is orthogonal to the support surface 4a at an inclination angle of 45 degrees (that is, 90 degrees).
It has a neutral angle (in degrees) and a tilt angle of 45 degrees to the left. Further, each of the stoppers 40, 42, 48 can be adjusted to an accurate angle by individually screwing in and out of the wall portion 4c. With this configuration, the swing arm 6 can be swung until it comes into contact with any of the stoppers 40, 42, 48 and adjusted to the respective correct angles.

That is, the left tilt angle 12L shown in FIG. 1 and the like is the angle when the operation pin 52 is in contact with the stopper 48, and the neutral angle 12C is the angle when the operation pin 52 is in contact with the stopper 42. The right tilt angle 12R is the angle when the operation pin 52 is in contact with the stopper 40.

Hereinafter, the area between the left tilt angle 12L and the neutral angle 12C will be referred to as a "usual area" having a high usage frequency, and the area between the neutral angle 12C and the right tilt angle 12R will be referred to as an "emergency area" having a low usage frequency. To do. Under this condition, the saw blade 12 is used in the normal range in the normal state, and exceptionally, the saw blade 12 is swung toward the emergency range in a special case. The stopper 40
Is projected from the emergency area side to the normal area side, and conversely, the stopper 48
Has a structure that projects from the regular area to the emergency area. Therefore, the stopper 40 regulates the swing limit angle on the emergency region side, and the stopper 48 regulates the swing limit angle on the normal region side. On the other hand, the stopper 42 has a structure projecting from the emergency area side to the normal area side, and supports the swing arm 6 on the support surface 4a.
Adjust to an angle orthogonal to.

Further, in FIGS. 6 to 8, the wall portion 4c is provided with a convex portion 46 protruding inward. The convex portion 46 is a concrete form of the regulation portion, and the operation pin 5
2 is provided close to the side opposite to the side contacting the stopper 42, and close to the side opposite to the side contacting the operation pin 52 with the stopper 48. With this configuration, even when the swing arm 6 is not fixed by tightening the handle 20, that is, in a free state, the operation pin 52
The rocking arm 6 cannot fall because it hits the convex portion 46 and stops. In addition, between the operation pin 52 and the protrusion 46 when the operation pin 52 is in contact with the stopper 42, or between the operation pin 52 and the protrusion 46 when the operation pin 52 is in contact with the stopper 48. Both have a structure in which a gap is created. Due to this gap, the left tilt angle 12L and the neutral angle 1
It becomes possible to adjust each angle of 2C by the stoppers 48 and 42, respectively.

In the left-right tilting saw device configured as described above, the swing arm 6 has a left tilt angle of 12 L as shown in FIG.
In order to shift the swing arm 6 to the state in which the swing arm 6 is at the neutral angle 12C as shown in FIG. 7, the following operation may be performed. That is, in FIG. 6, when cutting a material to be cut, the swing arm 6 is fixed by tightening the handle 20. For this reason, first handle 2
The swing arm 6 is released from being fixed by turning 0 (that is, the swing arm 6 is in a free state). In this state, the spring 30
Since the contact surface 6d1 is biased to the left in the drawing by the elastic force of, the swing arm 6 can be moved to the emergency area side with a small amount of force.

Next, pull the operation pin 52 (that is,
The swing arm 6 is moved to the right in the drawing while moving in the direction opposite to the direction biased by the elastic force of the spring 56).
When the operation pin 52 reaches the stage of overcoming the convex portion 46, the operation pin 52 is released and the swing arm 6 is continuously moved to the right in the drawing. By doing so, the operation pin 52 enters between the convex portion 46 and the stopper 42, and finally the operation pin 52 hits the stopper 42 and stops. Then, the swing arm 6 is fixed by tightening the handle 20. This state is shown in FIG.

The above-described operation shifts the swing arm 6 from the neutral angle 12C as shown in FIG. 7 to the right tilt angle 12R as shown in FIG. The same is true at times. Since the contact surface 6d2 is biased to the right in the drawing by the elastic force of the spring 30, the swing arm 6 can be moved to the normal region side with a small amount of force. Further, from the state where the swing arm 6 is at the right tilt angle 12R to the neutral angle 12C, or from the state where the swing arm 6 is at the neutral angle 12C, the left tilt angle 1 is set.
The same applies when shifting to the 2L state.

Now, comparing FIG. 6 with FIG. 8,
The distance between the contact surface of the fixed portion 6d and the contact piece at each swing limit angle is different. Specifically, the distance between the contact surface 6d2 and the contact piece 4f shown in FIG. 8 is equal to the contact surface 6d1 shown in FIG.
The positions of the respective members are set so as to be longer than the distance of the contact piece 4g. The reason why the distances are made different in this way is that the swing arm 6 can be swung with bilaterally symmetrical force in consideration of the weight of the motor 14.

That is, as shown in FIG. 3, the motor 14 for driving the saw blade 12 is mounted on the upper right side of the swing arm 6. Therefore, if the positions of the respective members are set while left-right symmetric, the right tilt angle compared with the amount of force required to move the swing arm 6 from the left tilt angle 12L (normal area side) to the neutral angle 12C. 12R (emergency zone side) to neutral angle 1
The amount of force required to move the swing arm 6 to 2C increases. This is because in this case, the balance between the left and right abilities becomes poor, which makes it inconvenient to operate.

Therefore, according to the first embodiment to which the present invention is applied, in the natural state, the operation pin 52 comes into contact with any one of the three stoppers 40, 42, 48, and depending on the abutting stopper. The saw blade 12 has a desired swing angle with respect to the support surface 4a (that is, a left tilt angle 12L, a neutral angle 1
2C, right tilt angle 12R) can be adjusted. Further, if the operation pin 52 is operated against the biased direction, the contact with the stopper 42 is avoided. Therefore, the swing arm 6 can be swung from the normal range to the emergency range by a simple operation.

Further, even when the swinging arm 6 is in a free state in which it is not fixed by tightening the handle 20, the operating pin 52 hits the convex portion 46 and therefore cannot fall.
For this reason, the rocking arm 6 does not fall down even if an inadvertent operation is performed, and the rocking arm 6 itself and the devices provided on the rocking arm 6 can be protected. And the first
It is easy to form the structure shown in this embodiment, and the number of parts can be reduced, so that the cost can be reduced.

Next, a second embodiment will be described with reference to FIGS. 9 to 12. The same members as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. First, the overall structure of the second embodiment is almost the same as that of the first embodiment, but is different in the following three points. That is, as shown in FIG. 9, among the three stoppers 40, 42, 48 provided on the wall portion 4 c of the support member 4, the stopper 40 is displaced with respect to the swinging direction of the stoppers 42, 48 and the swinging arm 6. It is provided in the open position. Further, between the stopper 40 and the stopper 42, there is newly provided a guide surface 44 with which the tip of the operation pin 52 slides. Further, the stopper 42
The convex portion 46 as shown in the first embodiment is not provided between the stopper 48 and the stopper 48. In this configuration, the stopper 4
8 is a non-sliding contact area where the operation pin 52 does not slidably contact the guide surface 44, and thus the stopper 4
The emergency area between 2 and the stopper 40 is a sliding contact section in which the operation pin 52 is in sliding contact with the guide surface 44.

In the left-right tilting saw device constructed as described above, the swing arm 6 has the left tilt angle 12 as shown in FIG.
In order to shift the swing arm 6 from the state of L to the state of the neutral angle 12C as shown in FIG. 11, the following operation may be performed. First, as in the first embodiment, the handle 20 is turned to bring the swing arm 6 into a free state.
In this state, the swing arm 6 is moved to shift the swing arm 6 to the neutral angle 12C. Then, the swing arm 6 is fixed by tightening the handle 20. The same applies when the swing arm 6 is shifted from the neutral angle 12C to the left tilt angle 12L. In this way, the swing arm 6 can be swung without operating the operation pin 52 between the left tilt angle 12L and the neutral angle 12C (that is, between the stopper 48 and the stopper 42).

On the other hand, the state in which the swing arm 6 is at the neutral angle 12C as shown in FIG. 11 is changed to the state in which the swing arm 6 is at the right tilt angle 12R as shown in FIG. 12 (that is, the swing arm 6). In order to shift 6 from the normal area to the emergency area), it is necessary to perform the following operations. First, the handle 20 is turned to bring the swing arm 6 into a free state. In this state, since the operation pin 52 needs to ride over the stopper 42 and slide on the guide surface 44, the operation pin 52 is pulled (that is, the direction opposite to the direction biased by the elastic force of the spring 56). Moving the arm 6 to the right in the drawing. Then, the operation pin 52 is applied to the stopper 40 and the handle 20 is tightened to fix the swing arm 6.

On the other hand, the swing arm 6 has the right tilt angle 1
In order to shift the swing arm 6 from the state of 2R to the state of the neutral angle 12C, the left tilt angle 12L and the neutral angle 12C are changed.
The same operation as that between the above may be performed. That is,
Without operating the operation pin 52, only the swing arm 6
Just move. Thus, the neutral angle 12C and the right tilt angle 1
Between 2R (that is, between the stopper 42 and the stopper 40), the handling differs depending on the direction in which the swing arm 6 is moved.

Therefore, according to the second embodiment to which the present invention is applied, the swing arm 6 is moved to a desired swing angle (ie,
In order to adjust the left tilt angle 12L, the neutral angle 12C, and the right tilt angle 12R), it is sufficient to operate the operation pin 52 at most once. Further, the transition from the emergency area (sliding contact section) to the regular area (non-sliding contact section) can be performed without operating the operation pin 52. Therefore, it is possible to easily position the swing arm 6 while minimizing the number of operations of the operation pin 52. As in the first embodiment, by providing the projection 46 on the wall portion 4c of the support member 4, it is possible to prevent the swinging arm 6 from falling down in a free state where the handle 20 is not fixed. .

Next, a third embodiment will be described with reference to FIGS. 13 to 15. The same members as those in the second embodiment are designated by the same reference numerals and the description thereof will be omitted.
First, the overall structure of the third embodiment is almost the same as that of the second embodiment, but is different in the following points. That is, in FIG.
As shown in, the holding member 52 provided on the swing arm 6
The operation pin 52a passed through the b is the wall portion 4c of the support member 4.
It is provided so as to be movable in the radial direction. The operation pin 52a has a retaining ring 58a, and a spring 56a is connected between the holding member 52b and the retaining ring 58a.
Therefore, the operation pin 52a is biased toward the center of the wall 4c by the elastic force of the spring 56a.

Further, the wall portion 4c is provided with a groove 60 having a step so that the operation pin 52a can swing. A portion of the groove 60 where the tip of the operation pin 52a slides is a guide surface 44a. Further, in the groove 60, stoppers 40a, 42a and 48a are provided at positions for adjusting the swing arm 6 to the left tilt angle 12L, the neutral angle 12C and the right tilt angle 12R, respectively, as in the second embodiment. Has been.

In the left-right tilting saw device configured as described above, by performing the same operation as in the second embodiment,
The swing arm 6 can be swung from the normal range to the emergency range, or conversely from the emergency range to the normal range, and can be positioned at a desired inclination angle. Therefore, also in the third embodiment to which the present invention is applied, the same effect as that of the second embodiment can be obtained.

Although one embodiment of the left and right tilting saw device has been described above, the structure, shape, size, material, number, arrangement and operating conditions of the other parts of the left and right tilting saw device are also described. It is not limited to the examples. For example, the present invention is applied to a saw device used by a turntable as the supporting member 4, but it can also be applied to a type in which the supporting member 4 is fixed. Also, the swing arm 6
Only the slide bar 8 may be interposed between the saw blade 12 and the saw blade 12, or only the vertical swing member 10 may be interposed, or the saw blade 12 may be directly attached to the swing arm 6. It may be. Furthermore, in the case of the type that is directly attached, the material to be cut can be cut or grooved by sliding the material to be cut on the saw blade 12. After all, the present invention can be applied to a general saw device in which the saw blade 12 tilts following the swing of the swing arm 6.

Further, although the circular saw is applied to the saw blade 12, the present invention can be applied to not only the circular saw but also a band saw, a chain saw or a reciprocating saw. Similarly, the “saw” referred to in the present specification is not limited to a saw for woodworking, but includes a grindstone for metal cutting and the like.

Further, the stoppers 40, 42, and 48 have an inclination angle of 45 degrees to the right, a neutral angle (that is, an inclination angle of 90 degrees) orthogonal to the support surface 4a, and an inclination angle of 45 degrees to the left. It was provided in each position. Not limited to this structure, it may be provided at positions having other tilt angles such as a tilt angle of 30 degrees to the left and right and a tilt angle of 60 degrees to the left and right, and three or more tilts including these tilt angles. The swing arm 6 may be positioned by providing it at each corner position. Note that the stoppers 40, 42, and 48 are not limited to the holding bolts, and may be other members such as wood screws and springs whose depth length can be adjusted.

In the second and third embodiments, the guide surface 44 on which the operating pin 52 slides in the direction biased by the elastic force of the spring 56 is formed in a flat shape. May be formed in two or more steps, and at least one stopper may be provided in each step. In this way, the stoppers provided in each step of the staircase are adjusted to the required inclination angle. According to this configuration, the spring 5
Depending on the amount of movement of the operation pin 52 against the direction biased by the elastic force of 6, the operation pin 52 can be moved to any step on the stepped guide surface. Therefore, the left tilt angle 12L, the neutral angle 12C
The right and left tilt angles 12R are not limited to the three tilt angles, and the rocking arm 6 can be easily positioned even when four or more tilt angles are set, and the number of times the operation pin 52 is operated is minimum. You can keep it to the limit.

[0042]

As described above, according to the first aspect of the present invention, the swing arm is moved to the left swing limit angle and the right swing limit angle of the saw blade by the three stoppers formed on the support member.
Since it is configured to regulate the saw blade at an angle orthogonal to the support surface,
One operation pin provided on this swing arm contacts three stoppers when being biased by elastic force, and is neutral when performing an operation to move against the biased direction. Contact with the stopper is avoided. Therefore, in a natural state, the operation pin abuts on any of the three stoppers, and the saw blade can be adjusted to a predetermined swing angle with respect to the support surface according to the abutting stopper. Further, since the contact with the neutral stopper is avoided by performing the operation of moving the operation pin against the biased direction, it is possible to shift between the stoppers. further,
It is easy to form this structure, and the number of parts can be reduced, so that the cost can be reduced.

Further, according to the invention of claim 2, since the swinging of the operation pin is regulated by the regulating portion provided in the supporting member, the swinging arm is not fixed and is free. Even if there is, it will not fall. Therefore, even if an inadvertent operation is performed, the swing arm does not fall down, and it is possible to protect the swing arm itself, devices provided on the swing arm, and the like.

Further, according to the invention of claim 3, the operation pin swings while slidingly contacting the guide surface in the sliding contact section, and swings without sliding anything in the non-sliding contact section. Is elastically urged, the transition from the sliding contact section to the non-sliding contact section is possible,
Transition from non-sliding section to sliding section is prohibited. On the other hand, when the operation pin is moved against the biased direction, the sliding contact section and the non-sliding contact section can be moved to each other. Therefore, in order to adjust the swinging arm to a desired swinging angle, it is sufficient to operate the operation pin at most once, and the operation pin must be operated for the transition from the sliding contact section to the non-sliding contact section. You can migrate without. Therefore, it is possible to easily position the swing arm while minimizing the number of operations of the operation pin.

[Brief description of drawings]

FIG. 1 is a side view of a conventional left-right tilting saw device.

FIG. 2 is a plan view of a conventional left and right tilt saw device.

FIG. 3 is a front view of a conventional left-right tilting saw device.

FIG. 4 is a side view of the left-right tilting saw device of the present invention.

FIG. 5 is a side view showing a partially broken side of a swing arm base portion in the first structure.

FIG. 6 is a cross-sectional view taken along the line AA of the swing arm base portion in the first structure shown in FIG. 5, showing a state in which the tilt angle is adjusted to one inclination angle.

FIG. 7 is a cross-sectional view taken along the line AA of the swing arm base portion in the first structure shown in FIG. 5, showing a state where the swing arm is adjusted to a neutral angle.

8 is a cross-sectional view taken along the line AA of the swing arm base in the first structure shown in FIG. 5, showing a state where the other tilt angle is adjusted.

FIG. 9 is a diagram showing a side view of a partially broken rocking arm base portion in the second structure.

10 is a BB cross-sectional view of the swing arm base portion in the second structure shown in FIG. 9, showing a state in which the tilt angle is adjusted to one inclination angle.

11 is a BB cross-sectional view of the swing arm base portion in the second structure shown in FIG. 9, showing a state where the swing arm base portion is adjusted to a neutral angle.

FIG. 12 is a sectional view taken along line CC of the swing arm base in the second structure shown in FIG. 9, showing a section in a state where the other tilt angle is adjusted.

FIG. 13 is a cross-sectional view of the swing arm base in the third structure, showing a state in which the tilt angle is adjusted to one inclination angle.

FIG. 14 is a cross-sectional view of the swing arm base in the third structure, showing a state where the swing arm is adjusted to a neutral angle.

FIG. 15 is a cross-sectional view of the swing arm base in the third structure, showing a state in which the tilt angle is adjusted to the other tilt angle.

[Explanation of symbols]

 4 Support member 4a Support surface 4f, 4g Contact piece 6 Swing arm 6d Fixed part 6d1, 6d2 Contact surface 12 Saw blade 14 Motor 30 Spring 32 Protective ring 34 Shaft 40, 42, 48 Stopper 44 Guide surface 46 Convex part ( Restriction part) 52 Operation pin 54 Lid 56 Spring 58 Retaining ring

Claims (3)

[Claims] 1. A support member having a support surface for supporting a material to be cut, a swing arm capable of swinging in the left-right direction with respect to the support member, and a swing arm for swinging the swing arm. In a left-right tilting saw device including a saw blade capable of following and tilting in the left-right direction, and a drive source for driving the saw blade, the support member includes a left swing limit angle and a right swing angle of the saw blade. Three stoppers, a pair of left and right stoppers that regulate the dynamic limit angle and a neutral stopper that regulates the saw blade to an angle orthogonal to the support surface, are formed. Is provided with one operation pin, which abuts against the three stoppers when the elastic pin is in a state of being urged by the elastic force, so as to resist the urging direction. And when performing the operation to move the operation pin The left and right tilt saw device is characterized in that the contact with the neutral stopper is avoided. 2. The supporting member is provided with a restricting portion that is provided in proximity to a side opposite to a side where the operation pin abuts on the neutral stopper and restricts swing of the operation pin. The left and right inclined saw device according to claim 1. 3. The support member has a sliding contact section in which the operation pin slides in contact with a guide surface in a direction biased by the elastic force, and a non-sliding contact in which the operation pin does not slide in contact with the guide surface. When the operation pin is urged by the elastic force, it is possible to transition from the sliding contact section to the non-sliding contact section, but from the non-sliding contact section to the sliding contact section. Of the sliding contact section and the non-sliding contact section can be moved to each other when the operation pin is moved against the biased direction. The left-right tilting saw device according to claim 1.