JP3000508U - Cutting machine - Google Patents

Abstract

(57) [Summary] [Purpose] To extend the life of circular saws in cutting machines. [Structure] A frame 2 supporting a circular saw is rotatably supported on a bed 4 via a support shaft 3 so as to be vertically rotatable, and the frame is rotated downward to cut a material to be cut on the bed with the circular saw. It can be so. The frame is fixed to a support shaft, and the support shaft is pivotally supported by the bracket 6 on the bed via an elastic member 12 that suppresses rotation of the frame. Since the rotation of the frame is suppressed by the elastic member, the rebound of the circular saw from the material to be cut is suppressed, and the phenomenon that the teeth of the circular saw suddenly bite into the material to be cut and chipped is prevented. The life can be extended.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cutting machine capable of reducing vibration during cutting with a circular saw.

[0002]

[Prior art]

 Conventionally, as a cutting machine, as shown in FIG. 4, a circular saw 1 is supported on a frame 2, and the frame 2 is supported on a bed 4 via a support shaft 3 so as to be rotatable in the vertical direction. There is one in which the material to be cut a on the bed 4 is cut by the circular saw 1 by rotating the frame 2 downward while holding the handle 5 fixed to the frame 2. As shown in FIG. 5, the frame 2 is connected to the support shaft 3 held by the bracket 6 on the bed 4, and is constantly moved upward by the coil spring 7 interposed between the bed 4 and the frame 2. It is supposed to be returned. At the time of cutting work, the operator holds the handle 5 and pushes down the frame 2 together with the circular saw 1 against the biasing force of the coil spring 7, and presses the circular saw 1 against the workpiece a fixed on the bed 4. Cut off.

[0003]

[Problems to be solved by the device]

 However, in the conventional cutting machine, when the tip, which is the blade tip of the circular saw 1 such as a tip saw, does not easily bite into the material a to be cut, the circular saw 1 is to be cut when the blade tip bites into the material a to be cut. The material a is repelled and hits the material a to be cut again, which causes a problem that the teeth are chipped due to the impact. When a tooth is chipped, vibration at the time of cutting becomes large, which also causes breakage of other teeth, which shortens the life of the blade. Such a phenomenon is likely to occur particularly when the material to be cut a is a hard material such as metal.

Further, during the cutting of the material a to be cut, since each chip of the tip saw intermittently contacts the material a to be cut, vibration is likely to occur. In particular, when the material to be cut a is a hard material such as metal, the occurrence of vibration is remarkable. Since the conventional cutting machine is designed to perform cutting work by simply placing the bed 4 on the installation surface, vibration may bounce on the installation surface 8 and may be transmitted to the cutting site, causing further vibration. When a large vibration is generated during cutting in this way, the chip is easily worn and chipped.

The object of the present invention is to solve such a problem.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, according to the present invention, a frame 2 supporting a circular saw 1 is supported on a bed 4 via a support shaft 3 so as to be vertically rotatable, and the frame 2 is rotated downward. As a result, in the cutting machine in which the material a to be cut on the bed 4 is cut by the circular saw 1, the frame 2 is fixed to the support shaft 3, and the support shaft 3 is attached to the bracket 6 on the bed 4. The frame 2 supporting the circular saw 1 is rotatably supported on the bed 4 via the support shaft 3 by adopting a structure in which the frame 2 is rotatably supported by the elastic member 12 for suppressing the rotation of the frame 2. In the cutting machine in which the material a to be cut on the bed 4 is cut by the circular saw 1 by supporting and rotating the frame 2 downward, the frame 2 is fixed to the support shaft 3, The support shaft 3 is attached to the bracket 6 on the bed 4 as described above. The circular saw 1 is supported by adopting a structure in which it is pivotally supported through an elastic member 12 that suppresses the rotation of the cam 2 and vibration-proof materials 21, 23 are attached to the support legs 18, 19 of the bed 4 described above. The frame 2 is supported on the bed 4 via the support shaft 3 so as to be rotatable in the vertical direction, and the frame 2 is rotated downward so that the material a to be cut on the bed 4 becomes the circular saw 1. In the cutting machine, the frame 2 is fixed to the support shaft 3, and the support shaft 3 is attached to the bracket 6 on the bed 4 via an elastic member 12 that suppresses the rotation of the frame 2. The support legs 18 and the wheels 20 that are supported and support the bed 4 have vibration damping members 21 and 22 attached thereto, respectively.

[0007]

[Action]

 When the frame 2 is rotated downward with the support shaft 3 as a fulcrum, the circular saw 1 hits the material a to be cut on the bed 4 and starts cutting. In the present invention, the frame 2 is fixed to the support shaft 3, the support shaft 3 is pivotally supported by the bracket 6 on the bed 4 via the elastic member 12, and the rotation of the frame 2 is suppressed by the elastic member 12. Therefore, the rebound of the circular saw 1 and the frame 2 from the material a to be cut is suppressed. Therefore, it is possible to prevent the tooth of the circular saw 1 from rapidly cutting into the material a to be cut and being chipped. Further, since it is possible to prevent chipping of teeth, it is possible to reduce the occurrence of vibration during cutting, prevent the induction of chipping of other teeth, and extend the life of the circular saw 1 as a whole.

Further, when the vibration damping materials 21, 22, 23 are provided in the present invention, the vibration damping materials 21, 22, 23 can absorb the vibration generated during the cutting operation. Therefore, it is possible to eliminate the inconvenience that the vibration rebounds from the installation surface 8 of the bed 4 and promotes the vibration at the cutting point, and it is possible to reduce the vibration and extend the life of the circular saw 1.

[0009]

【Example】

Next, an embodiment of a cutting machine according to the present invention will be described with reference to the drawings. Embodiment 1 As shown in FIG. 1, this cutting machine has a frame 2 for supporting a circular saw 1, and this frame 2 is supported on a bed 4 via a support shaft 3 so as to be vertically rotatable. By rotating the frame 2 downward, the material a to be cut on the bed 4 is cut by the circular saw 1. The frame 2 is provided with a handle 5 held by the operator when the frame 2 is pushed down.

In this case, the circular saw 1 is a tip saw for cutting metal, is axially supported by the frame 2, and is driven by a drive device including a motor 9 attached to the frame 2. The upper side of the circular saw 1 is covered with a safety cover 10 fixed to the frame 2, and the lower side of the circular saw 1 is covered with a lower guard 11. The lower guard 11 is connected to the frame 2 side and the bed 4 side via a known link mechanism (not shown), and overlaps with the safety cover 10 when the frame 2 is rotated downward. Thus, the circular saw 1 is exposed.

A bracket 6 for supporting the frame 2 via a support shaft 3 is provided at one end of the upper surface of the bed 4. As shown in FIG. 2, the frame 2 is fixed to a support shaft 3 at a forked portion at the lower end thereof, and the support shaft 3 is attached to a bracket 6 on the bed 4 by an elastic member for restraining the rotation of the frame 2. It is pivotally supported via 12. That is, the frame 2 is non-rotatably fixed to the support shaft 3 at two points by fixing screws 13, and the support shaft 3 has one end surface 2a of the frame 2 abutting on one end surface 6a of one bracket 6. It is pulled in the axial direction by the elastic member 12 so as to be in contact with it. The elastic member 12 is, for example, a Belleville spring, and is mounted on the threaded portion 3a of the support shaft 3 protruding toward the other end surface 6b of the bracket 6, and one or a plurality of fixed nuts 14 screwed onto the threaded portion 3a. Thus, it is pressed against the other end surface 6b of the bracket 6 via the flat washer 15. As a result, an appropriate frictional force is generated between the one end surface 2a of the frame 2 and the one end surface 6a of the bracket 6, and the rotation of the frame 2 is suppressed.

A torsion coil spring 7 is attached to the support shaft 3, and two spring ends are respectively locked to the frame 2 and the bed 4 so that the frame 2 can be returned upward. Has become. The frictional force of the elastic member 12 is smaller than the restoring force of the torsion coil spring 7 and does not hinder the returning of the frame 2.

Further, the elastic member 12 may be a compression coil spring or the like other than the disc spring. Also, a plurality of disc springs may be provided. A fixed vise 16 and a movable vise 17 for fixing the material a to be cut a on the bed 4 are installed at substantially the center of the bed 4. The movable vise 17 is movable on the bed 4 toward the fixed vise 16 by screw feeding or the like, and holds the workpiece a together with the fixed vise 16. The material to be cut a is, for example, a bar made of metal, wood, or the like. The rod material is not limited to a circular cross section, and may be a quadrangle, a triangle, or the like.

Support legs 18 and 19 are provided at the front and rear of the bed 4, and wheels 20 used when the cutting machine is moved on the installation surface 8 are provided at the rear end of the bed 4, and the front side is provided. Antivibration materials 21 and 22 are attached to the support leg 18 and the installation surface 8 of the wheel 20, respectively. The vibration damping members 21 and 22 absorb the vibration generated at the time of cutting with the saw blade 1. A vibration-proof material may be provided on the rear support leg 19 as well. A rubber-like elastic material made of rubber or the like can be used as the vibration isolator 21, 22. In this embodiment, the antivibration materials 21 and 22 can be omitted.

Prior to the cutting operation, the fixing nut 14 is turned to adjust the frictional force between the end faces 2a, 6a where the frame 2 contacts the bracket 6 so that the operation of the handle 5 is not hindered. I'll do it. Next, when the frame 2 is rotated downward with the support shaft 3 as a fulcrum while holding the handle 5, the circular saw 1 hits the material a to be cut on the bed 4 and starts cutting. When the circular saw 1 is a tip saw, the circular saw 1 is repelled by the material to be cut a when the cutting edge bites into the material to be cut a, and the frame 2 is rotated when trying to hit the material to be cut a again. Since 12 suppresses, the impact is softened and tooth chipping does not occur.

Further, during the cutting operation, since each tooth of the circular saw 1 collides intermittently with the material a to be cut and scrapes off, vibration easily occurs, but the elastic member 12 causes the frame 2 to rotate. Since the vibration is absorbed while being suppressed, the life of the circular saw 1 can be extended.

Further, since the vibration isolator 21, 22 is provided at the contact portion with the installation surface 8, the vibration isolator 21, 22 absorbs the vibration generated during the cutting work. Therefore, it is possible to extend the life of the circular saw 1 by eliminating the problem that the vibration is repelled from the installation surface 8 and promotes the vibration at the cutting point as in the conventional case.

Embodiment 2 As shown in FIG. 3, in this cutting machine, as in Embodiment 1, a frame 2 supporting a circular saw 1 is vertically rotatably supported by a support shaft 3 on a bed. 4 is supported on the bed 4, and the frame 2 is rotated downward so that the material a 1 to be cut on the bed 4 is cut by the circular saw 1. Further, the frame 2 is fixed to a support shaft 3, and the support shaft 3 is pivotally supported by a bracket 6 on the bed 4 via an elastic member 12 that suppresses rotation of the frame 2. However, in this embodiment, the vibration-proof materials 21 and 23 are attached to the support legs 18 and 19 at the front and rear of the bed 4, respectively.

Thus, the vibration generated during the cutting work is absorbed by the vibration damping members 21 and 23 on both the front and rear support legs 18 and 19, and the bounce of the vibration from the installation surface 8 is prevented. As a result, the inconvenience that vibration is promoted at the cutting location is eliminated, and the life of the circular saw 1 is extended.

[0020]

[Effect of device]

 According to the present invention, the frame is fixed to the support shaft, the support shaft is pivotally supported by the bracket on the bed through the elastic member, and the rotation of the frame is suppressed by the elastic member. Bounce from the cutting material is suppressed. Therefore, it is possible to prevent the phenomenon that the teeth of the circular saw suddenly bite into the material to be cut and are chipped. Further, since it is possible to prevent chipping of teeth, it is possible to reduce the occurrence of vibration during cutting, prevent the induction of chipping of other teeth, and extend the life of the circular saw as a whole.

Further, when the vibration isolator is provided in the present invention, vibration generated during the cutting operation can be absorbed by the vibration isolator. Therefore, it is possible to eliminate the inconvenience that the vibration rebounds from the installation surface of the bed and promotes the vibration at the cutting point, and it is possible to reduce the vibration and extend the life of the circular saw.

[Brief description of drawings]

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

FIG. 2 is a partial cutaway view of a connecting portion between a frame and a bed.

FIG. 3 is a side view of another embodiment of the cutting machine according to the present invention.

FIG. 4 is a side view of a conventional cutting machine.

FIG. 5 is a partial cutaway view of a connecting portion between a frame and a bed in a conventional cutting machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Circular saw 2 ... Frame 3 ... Spindle 4 ... Bed a ... Material to be cut 12 ... Elastic members 18, 19 ... Support legs 21, 22, 23 ... Anti-vibration material 20 ... Wheels

Claims (3)

[Scope of utility model registration request] 1. A frame for supporting a circular saw is rotatably supported on a bed via a support shaft so as to be vertically rotatable, and the frame is rotated downward so that the material to be cut on the bed is In a cutting machine that cuts with a circular saw, the frame is fixed to the support shaft, and the support shaft is pivotally supported by a bracket on the bed via an elastic member that suppresses rotation of the frame. Characteristic cutting machine. 2. A frame for supporting a circular saw is rotatably supported in the vertical direction on a bed via a support shaft, and the frame is rotated downward so that the material to be cut on the bed is In a cutting machine for cutting with a circular saw, the frame is fixed to the support shaft, the support shaft is pivotally supported by a bracket on the bed via an elastic member that suppresses rotation of the frame, and the bed is The cutting machine is characterized in that a vibration-proof material is attached to the support legs of the cutting machine. 3. A frame for supporting a circular saw is rotatably supported on a bed via a support shaft so as to be vertically rotatable, and the frame is rotated downward so that the material to be cut on the bed is In a cutting machine for cutting with a circular saw, the frame is fixed to the support shaft, the support shaft is pivotally supported by a bracket on the bed via an elastic member that suppresses rotation of the frame, and the bed is The cutting machine is characterized in that vibration-proof materials are attached to the support legs and wheels that support the wheel.