JPH0626801B2 - Fence position adjustment mechanism in biscuit jointer - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a biscuit joint which forms an arcuate groove for pushing a joining piece into a joining surface of wood when joining timber using the joining piece. However, more specifically, it relates to a fence position adjusting mechanism of the biscuit jointer.

[Conventional technology]

Conventionally, when joining wood, a joining method of forming a tenon in one wood and forming a tenon in the other wood and pushing the tenon into the tenon is used, but the tenon and tenon Processing requires considerable labor and skill. Then the sixth
As shown in the drawing, arc-shaped grooves g ₁ and g ₂ are formed on the joint surfaces J ₁ and J ₂ of both woods W ₁ and W ₂ to be joined, and a joining piece B called a biscuit is pushed into the arc-shaped grooves. A simple joining method is used.

Biscuit B is usually made of beech wood and has an elliptical shape.
The adhesive filled in the grooves g ₁ and g ₂ swells to strengthen the bond.

In order to form the arcuate groove, various biscuit jointers have been conventionally devised. The general structure of the biscuit jointer is shown in FIG.
A motor casing 2 having a built-in gear case 4 incorporating the power transmission means 3 connected to the motor 1 is formed integrally, these cases 2 and 4 are slidably on the base 5 which abuts the timber end surface J ₁ It is provided. The base 5 incorporates a cutter 6, which is connected to the power transmission means 3 and rotates. Further, a grip portion 9 is integrally provided above the case 2 or 4. A post 7 is erected in front of the base 5, and a fence 8 that comes into contact with the upper surface of the wood is attached to the post 7.
Is provided so as to be vertically slidable and fixable with respect to the post 7. An opening 5a is formed on the front end surface of the base 5, and when the motor case 2 and the gear case 4 move forward with respect to the base 5, the cutter 6 projects from the opening 5a,
Arc-shaped grooves g ₁ and (g ₂ ) are formed in the wood end faces J ₁ and (J ₂ ). By adjusting the vertical position of the fence 8 with respect to the post 7, the cutting position of the arcuate groove g ₁ in the thickness direction of the wood can be adjusted.

[Problems to be Solved by the Invention]

Here, by the front end surface of the base 5 and the fence 8,
The relative position between the wood and the biscuit joint is determined, and thus the cutting position by the cutter 6 is determined. However, in the conventional biscuit joint, it was necessary to replace the fence in accordance with the processing. For example, when the upper surface of the wood is inclined as shown in FIG. 8, it is necessary to select a fence 8 ′ that can adapt to the inclination angle and attach it to the post 7. Such fence replacement work is complicated and reduces work efficiency.

In order to solve the problem
A mechanism for adjusting the angle is conceivable, but in this case, a mechanism for adjusting the vertical position of the fence is naturally required separately, which makes the mechanism complicated and difficult to realize.

Further, in the conventional device, since the grip portion 9 is provided on the integrated case, the pressing force cannot be directly applied to the base during the work, and the stable cutting operation cannot be achieved.

Therefore, the present invention overcomes the above-mentioned drawbacks of the conventional biscuit joiner, does not require replacement of the fence, and can adjust the vertical position of the fence and the fence angle with respect to the post with a simple mechanism. It is intended to provide a fence position adjusting mechanism of the.

[Means for Solving the Problems]

That is, according to the present invention, a base (5) having a cutter (6) built-in, the end face of one end of which abuts on the end face of the processed wood;
A drive means (1); a power transmission mechanism having one end connected to the drive means and the other end connected to the cutter; and a case (2) containing the drive means and the power transmission mechanism. In a biscuit joint in which the case is slidably provided on the base so that the cutter can be projected from and retracted from an end surface of the one end of the base, a vertically elongated hole (15) is provided at both end portions of the base. A pair of fence support parts (7) formed with is fixed, and side plates (27, 28) having slots (32) applied to the fence support parts are provided on the left and right sides of the fence. On the side plate, at the location corresponding to the center of the circular arc of the slot, the elongated hole (1
5) is provided with a protrusion (31) slidably engaged with the slot, and at the intersection of the slot and the slot, both the slot and the slot are penetrated, and the fence is supported by the fence support section. On the other hand, there is provided a fence position adjusting mechanism in a biscuit joint, which is provided with a pair of fixing means (10) for fixing an angle adjustable and a vertical position adjustable.

[Action]

By fastening or loosening the fixing means provided at the intersection of the long hole and the arcuate slot, the fence can be fixed or movable with respect to the fence supporting means. When the fixing means is loosened, the fence can be rotated about the protrusion along the slot, and the fence angle can be adjusted. Further, since both the projection and the fence fixing means are engaged with the elongated hole, the fence can be slid vertically along the elongated hole, and the vertical position of the fence can be adjusted.

〔Example〕

A fence position adjusting mechanism in a biscuit joint according to the present invention will be described with reference to the drawings.

FIG. 1 is a side view of a biscuit jointer provided with a fence position adjusting mechanism 10 according to the present invention. A motor case 2 having a built-in motor, which is a driving means, is connected to the motor and power connection as in the conventional biscuit jointer. The gear case 4 having the built-in power transmission mechanism is integrated (hereinafter referred to as an integrated case), and the integrated case is slidably mounted in the direction of arrow A on a base 5 having a built-in cutter. An opening 5a is formed in the end surface of the tip of the base 5, and when the integrated case moves in the direction of arrow A, a part of the cutter can project from the opening 5a.

A base portion 7a of a fence support member 7 is erected and fixed to each end of the base 5 by bolts 11 and 12, and a grip member extending between the upper end portions 7b of the fence support members 7 in parallel with the base 5. 14 (FIG. 3) is fixed by bolts 13, thus providing a grip at the front of the joint.

An elongated hole 15 is formed in the fence supporting member 7 in the vertical direction, so that the fence 8 can be slidably moved in the vertical direction along the elongated hole.

The fence support member 7 should be vertically erected so that the respective elongated holes 15 are parallel to each other, and therefore, the positioning pins are formed in advance to engage with the holes formed in the base 5 in advance. The bolts 11 and 12 may be fastened after they are fitted together.

FIG. 2 is a sectional view showing the internal structure of the biscuit jointer provided with the fence position adjusting mechanism according to the present invention.

The motor 1 is arranged in the motor case 2, and both ends of the motor shaft 16 are rotatably supported by bearings 17 and 17a. A bevel gear 18 is fixed to the tip of the motor shaft 16.

On the other hand, the drive transmission means 3 has a rotating shaft 21 rotatably supported by bearings 19 and 20, and a second bevel gear 22 fixed to the upper end of the rotating shaft 21 and meshing with the bevel gear 18. A circular cutter 6 is provided at the lower end of the inner flange 24.
And an outer flange 23 so as to be detachably fixed.

A slider 25 is integrally provided at the lower end of the gear case 4, and the slider is slidably provided in a guide groove 50 formed at the upper end of the base 5. Slider 25
A projection 26 is formed on the lower surface of the slider so as to be able to contact the stopper member 77 at the upper end of the base, and a tension spring 57 is interposed between the base 5 and the slider 25.
Is always urged in the direction opposite to the arrow A so that the circular cutter 6 can be arranged in the base when the biscuit joint is not used for safety.

As shown in FIG. 3, the fence 8 has a substantially U shape and includes a pair of left and right side plates 27 and 28 slidably fixed to the fence support member 7 and a holding plate 29 that connects the left and right side plates. Have. The pressing plate 29 has an area that can be pressed by the operator's hand, and has a marking line L drawn on the surface of the processed wood.
₁ and L ₂ (FIG. 6) to match the line mark 30
Are formed.

As shown in FIGS. 1, 4 and 5, one side plate 27 of the fence 8 is formed with an inwardly extending projection 31 which slidably engages with the slot 15 of the fence support member 7. To meet. This projection also plays a role as a shaft fulcrum when the fence 8 changes its angle with respect to the fence support member 7. Further, an arcuate slot 32 is formed on a virtual arc centered on the protrusion 31. Furthermore, on another virtual arc centered around the protrusion 31, at constant rotation angles (for example, 30
A plurality of recesses 33 are formed (for each degree). It should be noted that the other side plate 28 is also formed with a protrusion 31 ′ and an arcuate slot 32, and the protrusion 3 provided on the left and right side plates 27, 28.
Needless to say, the reference numerals 1 and 31 'are coaxial with each other, and the arcuate slots 32 are also provided at positions facing each other.

As shown in FIGS. 1 and 4, hexagonal bolts 34, which are fixing means, are provided at the intersections of the slots 15 and the arcuate slots 32.
34 'is inserted. These hexagon bolts 34, 3
The 4'hexagonal head is located on the outside and the circular part 3 is on the inside.
5, 35 'and screw parts 36, 36'. Circular part 3
5, 35 'and the threaded portions 36, 36' have different cross-sectional areas,
A step is provided between the two. And the circular parts 35, 3
The diameter of 5'is larger than the width of the long hole 15,
The diameter of 36 'is smaller than the width of the slot 15.

The threaded portions 36 and 36 'of the hexagon bolts 34 and 34' are respectively screwed into the square nuts 37 and 37 '. Square nut 3
7, 37 'are square heads 38, 38' and square protrusions 39, 3
9'and the square protrusions 39, 39 'are always in sliding engagement with the slot 15.

The hexagonal heads of the hexagonal bolts 34, 34 'are cup-shaped members 43,
Capped at 43 ', each cup-shaped member 43, 43' is
It is fixed to the hexagonal head with screws 44 and 44 '. A lever 45 (Fig. 1) is integrally attached to each of the cup-shaped members 43 and 43 '. By operating the lever 45, the hexagon bolt 3
The amount of screwing of the square nuts 37, 37 'with the screw nuts 4, 34' is adjusted so that the side plates 27, 28 are fixed to and released from the fence supporting members 7, 7 '.

The screwing relationship between the hexagonal bolt 34 'and the square nut 37' (for example, the fixing means 10 'in FIG. 4) will be described. The circular portion 35' of the hexagonal bolt 34 'has a substantially oval-shaped washer. 40 'is attached.

The washer 40 'has a round hole, and the hexagon bolt 34'
Is inserted into the circular portion 35 '. A protrusion 41 'is formed on the base portion of the washer 40' at a position corresponding to the protrusion 31 'of the side plate 28 and engages with the recess 31a' of the side plate 28. Therefore, the washer 40 'is prevented from freely rotating around the round hole. Washer 40 '
A bent portion 42 is formed at the tip of the lever so that it can come into contact with the lever 45, and the lever 45 is prevented from over-rotating (the nut 37 'is prevented from coming off).

The above-mentioned screwing relationship is the same for the hexagon bolt and square nut on the right side of FIG. 4, but they are different in the following points.

That is, the axial length of the circular portion 35 'of the left hexagon bolt 34' is longer than the total thickness of the side plate 28 and the washer 40 ', and is provided at the boundary between the circular portion 35' and the screw portion 36 '. The stepped portion functions as an annular seat, which abuts the fence support member 7. Therefore, the side plate 28 is fixed only in the vertical position, but is not fixed in the rotational direction along the arcuate slot 32 around the protrusion 31 '.

On the other hand, the other side of the fence fixing means 10 (on the right side in FIG. 4) is provided with the side plate 27 as shown in FIG. 5 described above, and the plate spring 46 is further provided with the square protrusion 3 of the square nut 37.
It is slidably provided in the elongated hole 15 while being locked to 9. One end of the leaf spring 46 is substantially U-shaped, and a V-shaped protrusion 47 is formed at the U-shaped free end thereof, and elastically engages with any one of the plurality of recesses 33 formed in the side plate 27. Further, the axial length of the circular portion 35 is determined by the washer 40 and the side plate 2.
It is formed to be shorter than the total plate thickness of No. 7, and the inner end surface of the hexagonal head presses the side plate 27 via the washer 40, and the side plate 27 is fixed by being directly pressed to the surface of the fence support member 7. . Therefore, the fence fixing means 10 on the right side
In, both the vertical position of the fence and the fence angle are fixed.

In the above structure, when the left and right levers 45 are rotated in the direction of arrow B shown in FIG. 1, the screw engagement between the hexagon bolts 34, 34 'and the square nuts 37, 37' is loosened.
5 contacts the bent portions 42, 42 'of the washers 40, 40' to prevent further rotation, so that the square nuts 37, 3 '
The 7'is not separated from the hexagon bolts 34, 34 '.

In this state, the hexagonal heads of the hexagon bolts 34, 34 'move in a direction away from the fence support member 7, and the annular seats of the hexagon bolts 34, 34' separate from the surface of the fence support member 7. Therefore, the fixation of the fence side plates 27, 28 to the fence support member 7 is released, and the fence 8
Can move up and down along the long hole 15. In this case the protrusion 3
Since 1, 31 'are engaged with the slot 15, the fence can be smoothly guided.

Then, by adjusting the fence angle and rotating the lever 45 in the direction opposite to the arrow B in FIG. 1, the fence 8 is fixed to the fence support member 7 at a desired vertical position and a desired fence angle. .

When it is desired to adjust only the fence angle without changing the vertical position of the fence, only one lever 45 (on the right side in FIG. 4) is rotated in the arrow B direction. In this case, the hexagon bolt 34 separates from the surface of the fence supporting member 7, and the fence side plate 27 can freely rotate with respect to the fence supporting member 7. On the other hand, with respect to the left fence fixing means 10 ', the lever 45 does not have to be rotated. This is because the bare side plate 28 is always rotatable around the circular portion 35 'of the bolt.

Furthermore, it is also possible to adjust the vertical position of the fence while maintaining the fence angle at a predetermined angle. That is, even when the left and right fence fixing means are slightly loosened to allow the fence to move up and down, the V-shaped projection of the leaf spring elastically maintains the engagement with any one of the recesses 33. This is because the fence angle can be maintained in that state.

In the above-mentioned embodiment, the axial lengths of the circular portions 35, 35 'of the hexagonal bolts 34, 34' in the left and right fixing means 10, 10 'are made different, and the circular portions 35, 35' and the screw portions 36, 3'are provided.
Although the cross-sectional areas of 6'are different, one fixing means 10
And the cross-sectional areas of the circular portion 35 and the screw portion 36 in
Even if the circular portion 35 is formed so as to pass through the elongated hole 15, the vertical position of the fence and the fence angle can be fixed at the same time.

〔The invention's effect〕

As described above, in the fence position adjusting mechanism of the biscuit jointer according to the present invention, the protrusions of the side plates on both the left and right sides of the fence are slidable in the vertical direction along the elongated holes of the fence supporting portion, and the pair of fixing means. Penetrates the slot of the side plate and the elongated hole of the fence supporting portion, so that the fence can be supported with respect to the fence supporting portion so that the angle can be adjusted and the position in the vertical direction can be adjusted. Therefore, both the vertical position of the fence and the fence angle can be adjusted, and the optimum cutting position of the cutter can be immediately provided for various types of wood to be processed.

Further, since the other fence side plate is provided so as to be always rotatable with respect to the other fence fixing means, the fence angle can be easily adjusted only by loosening the screwing relationship of the one fence fixing means.

Further, since one side plate is formed with concave portions at regular intervals and is configured to elastically engage with the V-shaped projection of the leaf spring, a predetermined fence angle can be easily provided.

In addition, the pair of fence support members that are erected and fixed to the end portion on the base side are connected to each other by the grip portion, so that the pressing force of the base against the processed wood is increased and the cutting operation of the biscuit joint is stabilized. be able to.

[Brief description of drawings]

1 is a side view of a fence position adjusting mechanism in a biscuit joint according to the present invention, FIG. 2 is a partial cross section of a fence position adjusting mechanism in a biscuit joint according to the present invention, and FIG. 3 is a biscuit joint according to the present invention. FIG. 4 is a plan view of the fence position adjusting mechanism, FIG. 4 is a partial cross-sectional view showing the relationship between the fence and the fence supporting means and the fence fixing means in the present invention, and FIG. 5 is a plan view showing the side plate of one fence according to the present invention. Fig. 6 is a perspective view showing the joining of timber using biscuits, Fig. 7 is a schematic view showing a conventional biscuit joint, and Fig. 8 is a schematic showing cutting work using a conventional biscuit joint. It is a figure. 5 ... Base, 6 ... Cutter, 7 ... Fence support member, 8 ... Fence, 10 ... Fence fixing means, 14
...... Grip member, 15 ...... oblong hole, 27, 28 ...... side plate, 3
1 ... Protrusion, 32 ... Arc-shaped slot, 33 ... Recess,
34, 34 '... Hexagon bolt, 35, 35' ... Circular part, 36, 36 '... Screw part, 37, 37' ... Square nut, 38, 38 '... Square head, 39, 39' ...... Square protrusions, 40,40 '... Washers, 41,41' ...
Protrusion, 42 ... Bent portion, 43, 43 '... Cup-shaped member, 45 ... Lever, 46 ... Leaf spring, 47 ... V-shaped protrusion.

Claims (4)

[Claims] 1. A base having a built-in cutter, one end of which comes into contact with an end surface of a wood to be processed, drive means, and a power transmission mechanism having one end connected to the drive means and the other end connected to the cutter. A biscuit joiner having a case containing the driving means and the power transmission mechanism, the case being slidably provided on the base so that the cutter can be retracted from the end face of the one end of the base. A pair of fence support portions having elongated holes formed in the vertical direction are fixed to both side ends of the base, and left and right sides of the fence have side plates each having a slot applied to the fence support portion. The side plate is provided with a projection slidably engaged with the elongated hole at a position corresponding to the center of the arc of the slot, and at the intersection of the elongated hole and the slot, Slot and slot A fence position adjusting mechanism in a biscuit joint, characterized in that a pair of fixing means for fixing the fence to the fence supporting portion so as to be capable of adjusting the angle and adjusting the position in the vertical direction is provided. . 2. At least one of the left and right side plates is provided with a plurality of recesses at regular intervals on an imaginary circumference centered on the protrusion, and an elastic member having a protrusion at the tip is fixed to the inner surface. It is slidably mounted in the oblong hole through means, and the convex portion selectively elastically engages with the concave portion, thereby enabling stepwise angle adjustment of the fence. The fence position adjusting mechanism in the biscuit jointer according to claim 1. 3. One of the pair of fixing means is such that one fence side plate is always rotatable and only the vertical position of the fence supporting member can be adjusted and set, and the other fixing means is The fence position adjusting mechanism for a biscuit joint according to claim 1, wherein the other fence side plate is provided so as to be adjustable in angle and adjustable in position in the vertical direction with respect to the fence supporting member. 4. A grip part is provided which connects upper ends of the pair of fence support parts to each other.
A fence position adjusting mechanism in the biscuit jointer described in the paragraph.