JP2000176901A - Circular saw machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the assembling and folding of a table. SOLUTION: To fixed legs 6 fixed below a table 2, movable legs 7 are connected pivotally under the state that a locking mechanism 12 for locking a movable leg in an upright state at the joint 9 of each movable leg 7. Between movable legs 7 and 7, a stay 18, which is divided into split stays 20 and 21 and can be foldable at its middle, is spanned. Under the state that the split stays 20 and 21 are stretched, the movable legs are pushingly widened outwards and, at the same time, each locking mechanism 12 locks the rotation of each movable leg 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circular saw having a rectangular table provided with saw blades and movable legs which can be folded via fixed legs.

[0002]

2. Description of the Related Art The above-mentioned circular saw is disclosed in Japanese Patent Application Laid-Open No. 10-18070.
As disclosed in Japanese Unexamined Patent Publication No. 2 (1994), a leg mounting member as a fixed leg is fixed to four corners of a rectangular table having a saw blade, and a pair of movable legs formed in a frame shape with a pipe or the like is fixed to the leg mounting member. The upper end of the movable leg is pivotally attached to the opposing sides of the movable leg by a pin, and the lower part of the movable leg is pressed against the leg mounting member by a knob bolt parallel to the downward direction and tightened. . According to this configuration, when the knob bolt is loosened and removed, both movable legs can be folded down and folded to the lower part of the table,
It is convenient for storage and transportation. A stay is provided between the two movable legs to improve rigidity during assembly.

[0003]

In the above-mentioned circular sawing machine, it is necessary to remove the knob bolt and the stay at the time of folding, so that much labor and time are required for folding and assembling, and workability is poor. Further, since the knob bolt and the stay are completely removed at the time of folding, the storage becomes troublesome and may be lost. Furthermore, since the leg attachment member (fixed leg) that supports the movable leg is made of sheet metal, the rigidity of the movable leg itself is insufficient even as a whole, and it is stable due to rattling when using a circular saw machine. Makes her worse.

In view of the above, a first aspect of the present invention is a circular sawing machine which can be easily folded and assembled with a single touch, does not lose a stay or the like, and has good rigidity and stability during assembly. It is intended to provide.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, the fixed leg is provided with a pipe-shaped frame fixed to two opposite sides of the table, respectively. On the other hand, the stay can be bent at at least one position in the middle portion, and both ends are rotatably connected to the movable leg, and furthermore, the extended portion of the stay is bent at the bent portion of the stay. A holding means that can be maintained is provided so that the movable legs can be maintained in an upright state by pushing and expanding the movable legs in the extended state of the stay by the holding means, while the movable part is bent by bending the stay by releasing the holding means. The leg can be folded between the fixed legs. According to the second aspect of the present invention, in addition to the object of the first aspect, in order to further enhance the reliability of the circular saw machine in an assembled state, the movable leg and the fixed leg are connected to each other by folding the movable leg. The restricting lock mechanism is provided so as to be freely released. According to the third aspect of the present invention, in addition to the object of the first or second aspect, in order to simplify the operation of holding the stay and simplify the operation, and to further improve the workability, the holding means is moved from the axis of the stay. In the extended state of the stays, the ends are in contact with each other, so that the stays slightly contact each other as a gap formed between the bent portion having a bent center set downward and the ends of the bent portions above the bent center. It is configured to bend downward.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an overall view of the circular saw machine 1.
Reference numeral 2 denotes a rectangular table, which protrudes substantially the upper half of the saw blade 3 driven to rotate by a motor (not shown). Reference numeral 4 denotes a safety guide provided on the table 2 with the saw blade 3 attached. Further, two opposing sides (here, two lateral sides in the short direction) at the lower portion of the table 2 are provided with strip-shaped connecting plates 5,
Each of the connecting plates 5 has fixed ends 6 of metal pipe fixed legs 6 formed in a U-shaped frame and fixed at right angles to the table 2. Further, on opposite sides of the fixed legs 6, 6, a metal pipe formed by bending both ends into a substantially trapezoidal frame shape having a length approximately twice as long as the vertical end of the fixed legs 6. Movable legs 7, 7 are connected. The connection of each movable leg 7 is performed as shown in FIG.
Using a joint 9 having a U-shaped cross section in which the end of the joint 9 is held and fixed from the inside, and the upper end portions of both side plates 10, 10 of the joint 9 are axially attached to the vertical end of the fixed leg 6 by bolts 11. The movable leg 7 is rotatable about the bolt 11, but the rotation of the movable leg 7 to the outside is limited to a standing posture in which the end of the movable leg 7 contacts the vertical end of the fixed leg 6. Then, the inward rotation is possible until the posture becomes substantially horizontal.

[0007] A locking mechanism 1 for the movable leg 7 is provided on a side plate 10 outside the joint 9 of each movable leg 7.
2 are provided respectively. As shown in FIG. 3, the lock mechanism 12 includes a leaf spring 13 having one end fixed to the side plate 10 in a direction intersecting with the end of the movable leg 7, and a free end of the leaf spring 13 serving as a free end. A lock pin 14 penetrates a through hole 15 formed in the side plate 10, and when the end of the movable leg 7 abuts the vertical end of the fixed leg 6 in the upright state of FIG. A lock pin 14 urged toward the fixed leg 6 has a lock hole 16 formed in a vertical end of the fixed leg 6.
It can be inserted into. Reference numeral 17 denotes a folded portion formed at the free end of the leaf spring 13.

On the other hand, the horizontal portions of the movable legs 7, 7 are formed so as to protrude slightly upward so that the central portion 8 rises from the grounding surface, and a stay 18 made of a pipe is provided between the central portions 8, 8. It will be erected. The stay 18 is composed of divided stays 20 and 21 rotatably connected to the central portion 8 by a rotating end 19 formed by combining a pair of half joints. As shown in FIG. 4, stay joints 22, 22 having ring-shaped shaft attachment portions 23 eccentric below the axis of the divided stays 20, 21 at the ends thereof are fixed. That is, the shaft attaching portion 2
The stay 18 can be bent substantially at the center by axially attaching the pins 3 and 23 to each other with a pin 24 serving as a center of bending. Here, the stay joints 22 and 22 are used.
Are set at positions slightly retracted from the center of the pin 24 toward the rotating end 19 so that a gap H is formed between them, so that the stay 18 moves upward. Can be bent until the split stays 20 and 21 abut each other, and can be bent downward until the end portions 25 and 25 abut on each other as shown in FIG. Therefore, when the bent portion of the stay 18 is pushed down until the ends 25, 25 abut, the split stays 20, 21 push the movable legs 7, 7 outward, respectively, and extend the ends of the movable legs 7, respectively. 1 and 5 are pressed against the vertical end of the fixed leg 6, and in this state, the ends 25 are pressed against each other against the stay 18 that is bent downward due to the reaction force of the movable legs 7, 7 that are spread. Since the urging force acts, the stay 18 is maintained in the extended state unless an external force forcibly lifting the bent portion acts.

When the circular saw 1 constructed as described above is folded during transportation or storage, the center of the stay 18 is first lifted up from the assembled state in FIG. Is released, the upper leg is bent upward, and the spread of the movable legs 7, 7 is also released (FIG. 6). Next, in the lock mechanism 12 on the left side of FIG. 6, the tip of the leaf spring 13 is pulled in the direction away from the joint 9 using the folded portion 17, and the lock pin 14 is pulled out from the lock hole 16 of the fixed leg 6. Since the rotation lock of the movable leg 7 on the side is released, the left side of the table 2 is lifted as it is, and the movable leg 7 on the side is rotated inward, and the movable leg 7 is moved downward of the table 2 as shown in FIG. The fixed leg 6 on that side can be grounded by folding. At this time, the stay 18
The movable leg 7 can be bent further below the table 2.
It does not interfere with the rotation of. And the right lock mechanism 1
2, the lock pin 14 is similarly pulled out from the lock hole 16, and the right side of the table 2 is lifted to rotate the right movable leg 7 inward. As shown in FIG. 7 and 7 are alternately folded on the lower surface of the table 2, and the stay 18 is also folded almost in half to the right without interfering with the protrusion on the lower surface of the table 2, and the fixing legs 6 and 6 are folded.
Thus, the table 2 is supported in a compact state.

Conversely, when assembling the circular saw machine 1 from here, contrary to the folding procedure, the right side of the circular saw machine 1 is lifted to raise the movable leg 7 below, and then the left side is lifted. If the movable leg 7 on that side is erected, the state shown in FIG. 6 can be restored. After that, if the central portion of the stay 18 which is bent upward from here is pushed down, the split stay 2
The movable legs 7, 7 are pushed outward by the extension of 0, 21 so that each end is pressed against the vertical end of the fixed leg 6, and the lock pin 14 is moved vertically by the elasticity of the leaf spring 13. While sliding the end in the circumferential direction, lock hole 16
Insert That is, when the circular saw machine 1 is assembled, the lock mechanisms 12, 12 are automatically operated to lock the rotation of the movable legs 7, 7.

As described above, according to the present embodiment, the movable legs 7, 7 can be folded and assembled by a simple operation of the stay 18 and the lock mechanism 12 without using any tool. The labor and time required for assembling are greatly reduced, and workability is excellent. Also, stay 18
Since the stays remain connected to the movable legs 7, 7, the trouble of storing the stay 18 and the risk of loss are completely eliminated. Further, since the fixed leg 6 is formed as a pipe-shaped frame in addition to the movable leg 7, the rigidity of the circular saw 1 at the time of assembly is increased,
Stability is improved without rattling during use. In particular, in the present embodiment, since the lock mechanism 12 including the leaf spring 13 and the lock pin 14 is employed, even if the extended state of the stay 18 is accidentally released, the movable leg 7,
7 is maintained as it is. Therefore, the reliability of the circular saw machine 1 at the time of assembly is improved. Since the stay 18 can be held in the extended posture by setting the eccentric position of the pin 24 on which the divided stays 20 and 21 are pivotally mounted and the gap H, the structure of the holding means is simplified and the stay 18 is extended. By being able to easily maintain the state and bend,
It can also contribute to improving workability.

The form of the stay may be shifted or increased in the bending position. The connecting structure of the divided stays can use the eccentricity of the stay joint 22 and can freely set and release the extended state. If,
A knob bolt or the like may be used only for the holding means. Needless to say, the number of stays is not limited to one, and a plurality of stays can be provided, and the stays provided beside the movable legs can be bent inward in the bending direction. Also, the lock mechanism can adopt other structures such as engagement and disengagement between the key-like member and the projection, in addition to the mechanism by inserting and removing the lock pin 14 and the lock hole 16. Further, the connection between the fixed leg and the movable leg is not limited to the holding by the above-mentioned joint, and the stay 18 is also used here.
By using an eccentric hinge as described above, it is possible to fold only on the opposite side.

[0013]

According to the first aspect of the present invention, since the movable leg can be folded and assembled by a simple operation of the stay without using any tool, the labor and time required for folding and assembling are extremely low. And workability is excellent. In addition, since the stay remains connected to the movable leg, the trouble of storing the stay and the risk of loss are completely eliminated. Further, since the fixed legs are also made of a pipe-shaped frame, the rigidity of the circular saw at the time of assembly is increased, and the stability is improved without rattling during use. According to the second aspect of the present invention, in addition to the effect of the first aspect, since the movable leg is not folded unless the lock mechanism is released, the assembled posture of the movable leg is maintained regardless of the state of the stay. The reliability of the circular sawing machine during assembly is increased. According to the invention described in claim 3, in addition to the effect of claim 1 or 2,
When the stay is in the extended state, the ends are in contact with each other and the stay is bent slightly downward, so that the structure of the holding means is simplified and the stay is maintained in the extended state. And bending can be performed very easily, which can contribute to improvement of workability.

[Brief description of the drawings]

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

FIG. 2 is an explanatory diagram of a lock mechanism.

FIG. 3 is an explanatory diagram of a released state of a lock mechanism.

FIG. 4 is an explanatory view of a bent portion of a stay.

FIG. 5 is a side view of a circular saw machine in an assembled state.

FIG. 6 is a side view showing a state where a stay is released from an extended state.

FIG. 7 is a side view of a state where the left movable leg is folded.

FIG. 8 is a side view of a state where the right movable leg is folded.

[Explanation of symbols]

1. Circular sawing machine, 2. Table, 5. Connection plate, 6.
Fixed leg, 7 movable leg, 9 joint, 12 lock mechanism, 13 leaf spring, 14 lock pin, 16
..Lock holes, 18 stays, 20, 21 split stays, 22 stay joints, 23 shaft mounting portions, 2
4. Pin.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Zenichi Oda 3-11-8 Sumiyoshicho, Anjo City, Aichi Prefecture Makita Incorporated (72) Inventor Atsushi Utsuno 3-11-8 Sumiyoshicho, Anjo City, Aichi Prefecture F-term in Makita Co., Ltd. (reference) 3C012 BB12

Claims (3)

[Claims] 1. A pair of movable legs formed in a frame shape can be folded down on a rectangular table provided with a saw blade only on opposing sides via fixed legs fixed to a lower portion of the table. A circular saw having a stay interposed between the movable legs in an upright state, wherein the fixed legs are pipe-shaped frames fixed to two opposite sides of the table, respectively. On the other hand, the stay can be bent at at least one position in the intermediate portion, and both ends are rotatably connected to the movable leg, and further, the bent portion of the stay maintains the extended state of the stay. A possible holding means is provided so that the movable legs can be maintained in an upright state by expanding the movable legs in the extended state of the stay by the holding means, and the movable legs can be bent by bending the stay by releasing the holding means. Circular saw, characterized in that the foldable between the fixed legs. 2. The circular saw according to claim 1, wherein a lock mechanism for restricting folding of the movable leg is provided at a connecting portion between the movable leg and the fixed leg so as to be arbitrarily releasable. The holding means may be formed as a gap formed between a bent portion having a bent center below the axis of the stay and an end of the bent portion above the bent center. The circular saw machine according to claim 1, wherein the ends are in contact with each other, and the stay is slightly bent downward.