JP3051964B2 - Guide plate of saw machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a sawing machine which performs a cutting action by circulating rotation of an endless saw with a cutting edge of a saw tooth facing outward and a saw blade facing inward. Related to components, guide plates (guide bars).

(Structure of the Invention) A sawing machine having the guide plate (10) of the present invention as a component is an inverted U
Frame (1) whose basic shape is a square gate shape, and a sawtooth portion (2
a), an endless saw (2) having a saw blade (2b) formed inward, and a front and rear pillar (1) in front of the frame body (1).
a) a suspension wheel characterized by comprising a plurality of suspension wheels (3) arranged in the same vertical plane or the same vertical layer connecting the (a) and (1b) in the same vertical layer with the direction of the rotation axis being the horizontal direction. Endless saw by rotation of (3) (2)
Of the frame body (1) where the endless saw (2) is exposed, and between the lower end portions of the rear pillars (1a) and (1b) are formed as a cutting action line area for performing a cutting action.

The guide plate (10) is arranged along the endless saw (2) exposed in the cutting action line area, and the sawtooth of the endless saw (2) having a plate thickness vertically above the guide plate (10). It is formed into a shape that is the same as or thinner than the width, and the lower end is fitted to the saw blade (2b) of the endless saw (2) (it may be fitted to a part of the sawtooth portion), and both ends are forward. , And is attached to the rear pillars (1a) and (1b).

The role of the guide plate (10) is to prevent the escape of the endless saw (2) in the cutting action line area due to the cutting resistance at the time of the cutting action, or to restrain the deflection in the lateral direction from side to side. If the endless saw (2) is fitted with the saw blade (2b), that is, if the cross-sectional shape of the saw blade (2b) is concave, the cross-sectional shape of the lower end portion becomes convex and the saw blade (2b)
If the shape of the cross section is convex, the shape of the cross section at the lower end is concave.

FIG. 1 and FIG. 2 show an embodiment in which the sawing machine is configured to be portable.

In this embodiment, the front and rear pillars (1
a), the part joining the heads of (1b) is the handle part (1c), and two suspension wheels (3) are provided on each of the front, rear pillar (1a), and (1b) lower parts. An endless saw (2) runs through the inside of the partition plate (8) installed below (1c), and a total of two are placed on the front and rear pillars (1a) and (1b), respectively. I have.

A tensioning mechanism (9) consisting of a suspension wheel (3), a screw shaft with a wing head (9a) and a feed nut (9b) is arranged on the upper part of the front pillar (1a), and inside the rear pillar (1b). The suspension wheel (3) above the rear pillar (1b), which is set to drive circulation rotation of the endless saw (2), is rotated by the electric motor (4) housed in the vehicle.

On the left side of the endless saw (2) in the cutting action line area, a plate-like base (6) with its plate surface turned up and down is arranged, and between the plate-like base (6) and the frame body (1). After the elevating guide mechanism (7) is interposed, the lower surface of the plate-shaped base (6) is in contact with the upper surface of the material to be cut, and the machine body is placed on the material to be cut. Frame body (1) by manually pressing part (1c) downward, and frame body (1)
Of the endless saw (2), the suspension wheel (3), the electric motor (4), the guide plate (10), and the like, which are disposed or attached to the outside, and after the cutting operation, The movable part is configured to guide the upward movement to return to the original position again, and as shown in FIGS. 3 and 4, in this embodiment, the endless saw (2) having a convex cross section is used. The cross section of the lower end of the guide plate (10) has a concave shape corresponding to the saw blade (2b).

The saw is constructed as described above, and one of its components, the guide plate (10), is provided with an endless saw (2) in the cutting action line area.
In this case, the endless saw (2) itself is shaken separately from the escape and the runout during the cutting action.

Naturally, the endless saw (2) is strongly tensioned by the tensioning mechanism (9).

However, the swing still exists,
This is an endless saw set up to accommodate the repetitive movements of a curved run on the suspension wheel (3) as the endless saw (2) circulates, and a straight run between the suspension wheels (3). Most of it comes from the fineness of the saw (2). An object of the present invention is to eliminate such a shake.

The width of run-out by the endless saw (2) itself is zero at the front and rear pedestal portions (1a) and (1b) in the cutting action line area, at the rear end, and maximum at the center. Becomes

FIG. 5 is a side view showing that the lower end of the guide plate (10) is expanded downward by an amount corresponding to the run-out width of the endless saw (2) in the cutting action line area while keeping the plate thickness unchanged. ,
The shape of the lower end portion in the front-rear direction becomes a curved shape that expands downward from the front and rear ends toward the central portion, and the central portion of the cutting action line area coincides with the vertex of the curved shape.

As described above, when the shape of the lower end portion of the guide plate (10) in the front-rear direction is a shape (curved shape) corresponding to the deflection of the endless saw (2), the deflection of the endless saw (2) is absorbed and eliminated. At the same time, the degree of contact between the back surface of the saw blade (2b) of the endless saw (2) and the concave or convex lower end surface of the guide plate (10) is determined by the cutting action line area. It can be measured uniformly over the entire area.

However, the shape of the curved line expanding downward with the center of the cutting action line area coincident with the vertex indicates the case of a no-load state where the cutting action is not performed. The situation will be different if a cutting resistance is applied.

This will be described with reference to the embodiment shown in FIGS. 1 and 2 in which the rotation of the driving suspension wheel (3) disposed above the rear pillar (1b) is set to the left rotation, and the endless rotation in the cutting action line area is performed. Assuming that the traveling direction of the saw (2) is from the front pillar (1a) to the rear pillar (1b), the cutting operation is actually started, and the cutting resistance is applied to the endless saw (2). When it is applied, a strong pulling force is applied at the position near the rear leg (1b) side of the cutting action line area, and the cutting resistance and suspension are applied between the position where the cutting resistance is applied and the front leg (1a). The wheel (3) receives a compressive force in both directions due to the rotational force in the opposite direction.

For this reason, the endless saw (2) in the cutting action line area includes:
In this embodiment, partial tension "loosening" or "bending" at a position closer to the front pillar (1a), that is, a position further upstream in the running direction from the position where the cutting action is applied.
Is generated.

In order to absorb and eliminate the "looseness" or "bending" again, the "looseness" or "bending" is added to the above-mentioned curved shape having the vertex coincident with the center of the cutting action line area. At this time, the running direction of the endless saw (2) is, in terms of the greatest common divisor, the front direction of the front pillar (1).
If the direction is from a) to the rear pillar (1b), move to a position closer to the front pillar (1a) than to the center of the cutting action line area,
If the running direction is the opposite direction, it will move to a position near the rear pillar (1b).

The precise shape corresponding to the "loose" or "bent" is not only the cutting resistance during the cutting action and the compressive force due to the rotational force from the opposite direction, but also the rigidity of the endless saw (2) due to the slenderness of the suspension wheel. Various factors such as the rotational force and rotational speed of (3) or the cutting (cutting) ability of the endless saw (2) are involved.

Therefore, a shape that partially incorporates a linear portion, such as a flat linear top portion, instead of a single vertex of a shape that gradually expands downward may be sufficient.

As described above, the guide plate (10) is fitted at its lower end with the saw blade (2b) of the endless saw (2), and its lower end has a front-to-rear shape, which is the center of the front and rear ends. The endless saw (2) absorbs and eliminates the run-out of the endless saw (2) and the "slack" or "bend" by forming a curved shape gradually expanding downward toward the part or a shape including a partly linear portion. However, it is not always necessary to take the form of fitting with the endless saw (2) in the entire line of cutting action. This is because, as described above, the endless saw (2) itself has a thin and stiffness, and takes a form of fitting at an interval corresponding to the stiffness. Inevitably, the shape of the lower end portion in the front-rear direction has a continuous waveform.

FIG. 6 is a side view showing that the shape of the lower end of the guide plate (10) in the front-rear direction is a curved shape gradually expanding downward from the front and rear ends toward the center, and a continuous waveform is formed. It is a figure, and as a result of having made this continuous waveform, the lower end surface formed in any one of the uneven | corrugated shape of the guide plate (10) which contacts the back surface of the saw blade (2b) of an endless saw (2). The contact area is reduced by an amount corresponding to the space portion of the waveform, and the space portion can be used as a discharge portion or a discharge hole for sawdust.

Further, in the case where the shape of the cross section at the lower end is concave, if the shape of this continuous waveform is a cutting edge or a saw blade, cutting is performed by synergistic action with the sawtooth of the endless saw (2). Abrasion) capability is improved, and the burden of the guide plate (10) entering the groove formed in the material to be cut is reduced by cutting the blade with the cutting edge.

(Effect of the Invention) In the sawing machine having the guide plate of the present invention as a constituent element, the dimensional width and cutting depth of cutting are limited by the size of the frame body. As shown in the embodiment configured for portable use, the purpose is to obtain precise dimensional cutting by performing a cutting operation with the airframe fixed at a fixed position and to obtain a smooth cut surface with a small saw blade of an endless saw. And

Therefore, the role of stopping the endless saw in the cutting action line area of the guide plate from escaping upward or deflecting in the left-right lateral direction at the time of the cutting action is a factor that determines the value of the sawing machine.

Therefore, the shape of the lower end of the guide plate in the front-rear direction is gradually swelled downward from the front and rear ends to the middle direction, and the endless saw itself swings and “looses” or “bends”. Absorbing, eliminating, and maintaining the proper form of engagement between the endless saw blade and the guide plate over the entire line of cutting action is exactly what the intended role of the guide plate is. In addition, a phenomenon such as breakage or disengagement of the endless saw during the cutting operation can be prevented, and the purpose of the saw can be faithfully realized.

Furthermore, the cut into the material to be cut at the start of the cutting operation is started from the top or the top, and gradually before,
The transition to the rear end avoids the temporary and excessive impact that would otherwise occur if the entire line of mere cutting action was straightened, thus allowing a slow and smooth start of the cutting operation.

[Brief description of the drawings]

FIG. 1 is a left side view of an embodiment in which a sawing machine having a guide plate of the present invention as a component is used for portable use, and FIG.
Fig. 3 is a sectional view taken along line AA of Fig. 1, Fig. 3 is a partially enlarged view of the guide plate of the present invention in Fig. 1, and Fig. 4 is BB of Fig. 3.
5 and 6 are cross-sectional views schematically illustrating an embodiment of the guide plate of the present invention. 1 ... frame body, 1a ... front leg of frame body, 1b ...
… The rear pillar of the frame, 1c …… the handle of the frame,
2 ... Endless saw, 3 ... Suspension wheel, 3a ... Rotation axis of suspension wheel, 4 ... Electric motor, 5 ... Operation switch, 6 ... Plate base, 7 ... Elevation guide mechanism, 7a ......
Guide shaft, 7b ... sliding sleeve, 7c ... support plate, 7d ... lower link, 7e ... upper link, 7f ... torsion coil spring, 7g
... Pin, 7h ... Storage drum, 8 ... Partition plate, 9 ... Tension mechanism, 9a ... Screw shaft with butterfly head, 9b ... Feed nut, 10 ...
…Guide plate

Claims (5)

(57) [Claims] 1. A frame body (1) having an inverted U-shaped gate shape as a basic shape, a saw tooth portion (2a) formed radially outward on the same surface or in the same layer, and a saw blade inward. The endless saw (2) formed with (2b) and the same vertical surface or the same vertical layer that runs in the front and rear direction connecting the front and rear pillars (1a) and (1b) of the frame body (1) A sawing machine characterized by a plurality of suspension wheels (3) arranged in a horizontal direction in the direction of the axis as a component, and performing a cutting action by circulating rotation of an endless saw (2) by rotation of the suspension wheel (3). In the cutting action line area, before and after the endless saw (2) exposed between the rear pillars (1a) and (1b) lower ends, the board thickness is set upright. Is the same as the sawtooth width of the endless saw (2),
Or a thinner saw blade (2) with an endless end (2)
b) to be fitted with the front and rear legs (1
In the guide plate (10) joined to a) and (1b), the shape of the lower end of the guide plate (10) in the front-rear direction gradually expanded downward from the front and rear ends toward the center. Shaped sawing machine guide plate (10). 2. The entire shape in the front-rear direction of the lower end portion gradually expanding downward from the front and rear ends to the center portion is curved, or the curved portion and the linear portion are mixed. The guide plate (10) of a saw machine according to claim 1, wherein the guide plate (10) is shaped. 3. A vertex or apex of a front-rear shape of a lower end portion which gradually inflates downward from the front and rear ends to a center portion is deviated to either forward or rear from the center of the cutting action line area. The guide plate (10) of a sawing machine according to claim 1, wherein 4. A guide plate (10) for a sawing machine according to claim 1, wherein a continuous waveform is formed on the front-rear shape of the lower end portion gradually expanding downward from the front and rear ends to the central portion. ). 5. A continuous waveform formed on a front-rear shape of a lower end portion gradually expanding downward from a front end and a rear end toward a center portion has a cutting edge shape or a saw blade shape. A guide plate (10) for a sawing machine according to claim 4.