JP3538020B2 - Cutting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade case having a disc-shaped saw blade, such as a circular saw or a cutter, in which a hinge portion is disposed between a pair of connecting portions projecting from a base. The present invention relates to a cutting machine which is rotatably mounted on a mounting shaft.

[0002]

2. Description of the Related Art In a conventional cutting machine, a hinge portion of a blade case having a disk-shaped saw blade is disposed between a pair of connecting portions projecting from a base, and penetrates the hinge portion and the connecting portion. While the two are rotatably attached to each other by a mounting shaft such as a pin, a guide member extending along the shape of the blade case is connected to the other end of the base, and the rear end of the blade case is connected to the guide member By sliding and fixing at an arbitrary position, the amount of protrusion of the saw blade from the base can be adjusted.

[0003]

In the above-described base, the base and the blade case are likely to rattle at the shaft-attached portion due to dimensional tolerances of components such as a connecting portion, a hinge portion, and a pin, causing vibration during cutting. The use feeling is impaired, and the cutting accuracy is reduced. In some cases, a spring pin is used as the mounting shaft. In this case, although it is effective as a countermeasure against rattling, it takes time and labor to disassemble during assembly and repair.

[0004] In view of the above, the first aspect of the present invention is a cutting method capable of realizing a shaft attachment between a blade case and a base which can maintain cutting accuracy and feeling of use without rattling with a simple structure which can be easily assembled. It is intended to provide a machine.

[0005]

According to a first aspect of the present invention, in order to achieve the above object, the mounting shaft is slidable in the axial direction, and one end of the mounting shaft is in contact with a side surface of the hinge portion. While providing a contact part which can be contacted and formed with a diameter larger than the other end, the connecting part is provided with a regulating means capable of restricting slide of the mounting shaft, and the mounting shaft is provided with a contact part. The hinge portion is slid directly to a slide position where the hinge portion is pressed against the opposite connecting portion, and the slide of the attachment shaft is regulated by the regulating means at the slide position, so that the hinge portion is moved in the axial direction of the attachment shaft. It is characterized in that it can be regulated.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall view of a circular saw machine 1 as a cutting machine. A disc-shaped saw blade 2 driven by a motor is provided in a semicircular blade case 3 covering the upper part thereof, and is built in a motor housing 4. The motor is supported orthogonally to a motor (not shown). 5 is a handle, and 6 is a dust bag.
A rectangular base 7 is arranged below the blade case 3. The base 7 has a pair of connecting portions 8 and 9 erected on the upper surface in front of the cutting direction (right side in FIG. 1), and a hinge projecting forward of the blade case 3 between the connecting portions 8 and 9. Insert the part 10 and connect the connecting parts 8, 9 and the hinge part 10
On the other hand, a guide member (not shown) extending along the shape of the blade case 3 is provided upright at the rear of the base 7 to form a screw with the blade case 3 at the rear of the base 7. Combined, blade case 3
By sliding the rear end of the saw blade 2 with respect to the guide member and fixing the saw blade 2 at an arbitrary position, the amount of protrusion of the saw blade 2 from the base 7 can be adjusted.

Next, the details of the structure of connecting the connecting portions 8, 9 and the hinge portion 10 to each other will be described. Although a plurality of embodiments will be described, since the entire structure of the circular saw 1 is the same, the entire description will be omitted, and only the shaft-attached portion will be described with reference to the drawings. Embodiment 1 This embodiment and the following embodiment 2 are embodiments according to the first invention,
In FIG. 2, a stepped pin 11 as a mounting shaft has a penetrating end on one connecting portion 9 side larger in diameter than a penetrating end on the other connecting portion 8 side, and a large diameter portion 12 as a contact portion. And the connecting portions 8, 9 and the hinge portion 10 therebetween are loosely inserted,
Here, at the slide position where the stepped pin 11 is pressed against the other connecting part 8 by the large diameter part 12, the stepped pin 11 is screwed perpendicularly to the stepped pin 11 from above the connecting part 9. The axial movement of the stepped pin 11 is restricted by screwing the set screw 13 and pressing the large-diameter portion 12 with its tip. As described above, in the first embodiment, the hinge portion 10 loosely inserted into the stepped pin 11 restricts the axial movement of the stepped pin 11 between the large diameter portion 12 of the stepped pin 11 and the connecting portion 8. Therefore, rattling in the direction does not occur, and rattling in the lateral direction does not occur in the blade case 3 and the saw blade 2. Therefore, the cutting accuracy does not decrease,
Generation of vibration at the time of cutting can also be effectively prevented. Also, when assembling, the stepped pin 11 is inserted to connect the hinge 10 to the connecting portion 8.
, And the set screw 13 can be screwed in with a simple procedure, so that workability related to assembly and disassembly is also good. In particular, since there is a structure that can absorb dimensional tolerances and errors in molding and processing in the intervals between the hinge portions 10 and the connecting portions 8 and 9, it can always be produced with a constant quality, and each component has High processing accuracy is not required.

Mode 2 In the shaft mounting structure shown in FIG. 3, a slidable stepped screw 14 having a large-diameter portion 15 at one end into which the connecting portion 9 is loosely inserted is used. Here, the male screw portion 16 formed at the other end is projected outward of the connecting portion 8 with the hinge portion 10 loosely inserted, and a nut 17 (a lock nut or the like that can be prevented from loosening) is inserted there. The large-diameter portion 15 is screwed at a slide position where the hinge portion 10 is pressed against the connecting portion 8, and the set screw 13 is screwed in from above the connecting portion 9 to press the large-diameter portion 15, so that the stepped screw 14 is screwed. It is fixed. Therefore, the stepped screw 14 is restricted from moving in the axial direction while the hinge 10 is held between the large diameter portion 15 and the connecting portion 8.
As described above, also in the second embodiment, the hinge portion 10 loosely inserted into the stepped screw 14 is restricted from moving in the axial direction of the stepped screw 14 between the large diameter portion 15 and the connecting portion 8, and the blade case 3 And rattling of the saw blade 2 in the horizontal direction,
As in the first embodiment, the cutting accuracy does not decrease, and the generation of vibration during cutting can be effectively prevented. Also, assembling here,
Since the stepped screw 14 is pushed in to press the hinge portion 10 against the connecting portion 8 and the nut 17 and the set screw 13 are screwed together, the workability relating to assembly and disassembly is improved. Furthermore, since dimensional tolerances and errors in molding and processing can be absorbed, quality maintenance can be expected, and processing accuracy of each component is not required.

The specific configuration of the abutting portion of the mounting shaft and its restricting means can be changed as appropriate in addition to the above-described embodiments. The abutting portion includes the large diameter portions 12 and 15 and the connecting portion 8. , 9 and a pin having a straight diameter loosely inserted into the hinge portion 10, a snap pin or a snap ring, or a pin or screw or the like is attached orthogonally, and these are pressed against the side surface of the hinge portion 10 to restrict the movement. Is also conceivable. Further, a concave portion or a concave groove may be formed in a portion of the large diameter portions 12 and 15 where the tip of the set screw 13 abuts to ensure the fixation. Conversely, in the second embodiment, only the nut 17 is screwed. If sufficient fixation is obtained, set screw 1
3 can be omitted.

[0010] Embodiment 3 Next, a third embodiment of the implementation. The shaft mounting structure shown in FIG. 4 has a connecting portion 8 and 9 and a hinge portion 1 with a straight diameter headed pin 18.
In this case, a set screw 20 is screwed into the hinge portion 10 in a manner orthogonal to the headed pin 18 as a fixing means. By pressing the side of the headed pin 18, the hinge 10 and the headed pin 18 can be integrated. Therefore, the head-equipped pin 18 is pushed in until the head 19 serving as a stopper abuts against the outer surface of the connecting portion 9 and is slid, while the hinge portion 10 is slid until it comes into contact with the inner surface of the connecting portion 9. In this state, if the set screw 20 is screwed and integrated with the headed pin 18, the hinge part 10 integrated with the headed pin 18 is brought into contact with the connecting part 9 in the direction of the head 19 of the headed pin 18. The movement is regulated by the contact, and the movement in the opposite direction is regulated by the contact between the head 19 and the connecting portion 9. Thus, also in the third embodiment, the hinge portion 10
Since the movement of the headed pin 18 in the axial direction is restricted and the rattling of the blade case 3 and the saw blade 2 in the lateral direction does not occur, the cutting accuracy does not decrease as in the first and second embodiments. Generation of vibration at the time of cutting is also effectively prevented. Also, in the case of assembling here, the head pin 18 is pushed in until the slide is restricted, the hinge part 10 is pressed against the connecting part 9, and the set screw 2 is pressed.
0 can be screwed together in a simple procedure, which improves the workability of assembling and disassembling, and can also absorb dimensional tolerances, errors in molding and processing, and can be expected to maintain quality. No processing accuracy is required.

In the above embodiment 3, the head 19 of the head pin 18 is brought into contact with the outer surface of the connecting portion 9 and the hinge portion 10 is brought into contact with the inner surface of the connecting portion 9 to integrate the head pin 18. If there is enough space between the connecting portions 8 and 9, even if the pin is a headless pin, a clip pin as a stopper is provided between the connecting portion 8 and the hinge portion 10 of the headless pin. The hinge 10 is brought into contact with the inner surface of the connecting portion 9 on the opposite side in a state where a stopper ring or the like is provided and brought into contact with the inner surface of the connecting portion 8, and is fixed to the headless pin with a set screw 20. Also, it is possible to restrict the sliding of the headless pin, that is, the movement of the hinge portion 10.

[0012]

According to the first aspect of the present invention, since the hinge portion loosely inserted into the mounting shaft is restricted from moving in the axial direction of the mounting shaft, no rattling occurs in the direction. Also, no rattling occurs in the blade case and the saw blade in the lateral direction. Accordingly, the cutting accuracy does not decrease, and the occurrence of vibration during cutting can be effectively prevented. Further, since the assembling can be performed in a simple procedure, the workability relating to assembling and disassembling is improved.
Furthermore, even if there are dimensional tolerances and errors in molding and processing in the intervals between the hinges and connecting parts, the structure can absorb these errors, so that it is possible to always produce products with a constant quality and to require processing accuracy for each component. Not done.

[Brief description of the drawings]

FIG. 1 is an overall view of a circular saw machine.

FIG. 2 is an explanatory diagram of Embodiment 1.

FIG. 3 is an explanatory diagram of a second embodiment.

FIG. 4 is an explanatory diagram of a third embodiment.

[Explanation of symbols]

1. Circular saw machine, 2. Saw blade, 3. Blade case, 7
..Base, 8,9..Connection part, 10..Hinge part, 1
1 ··· Stepped pin, 12, 15 · · · large diameter part, 13, 20 ·
・ Set screw, 14 ・ ・ Stepped screw, 18 ・ ・ Pin with head, 1
9 ... Head.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-46710 (JP, A) JP-A-10-296701 (JP, A) JP-A-7-24521 (JP, U) JP-A-48 1182 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B23D 45/00-65/04

Claims (1)

(57) [Claims] 1. A hinge portion of a blade case provided with a disc-shaped saw blade is disposed between a pair of connecting portions projecting from a base, and both hinges are provided by a mounting shaft penetrating the hinge portion and the connecting portion. A cutting machine that is rotatably attached to each other, wherein the mounting shaft is slidable in the axial direction, and at one end thereof,
While providing the contact part which can contact with the side surface of the hinge part and is formed with a diameter larger than the other end, the connecting part is provided with regulating means capable of regulating the slide of the mounting shaft, Is slid to a slide position where the abutment portion directly presses the hinge portion against the connecting portion on the opposite side, and at this slide position, the slide of the attachment shaft is regulated by the regulating means, and the attachment shaft of the hinge portion is A cutting machine characterized in that movement in the axial direction can be restricted.