JPS5924610A - Manufacture of columnar body utilizing branch wood, etc. - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is based on punching out the center layer of a log cut from a branch or log using a pressing tool and a cylindrical blade. The present invention relates to a method of manufacturing a columnar body using branch wood, etc., which can extremely efficiently produce a columnar body that can be used as a buried tree, etc., and can greatly reduce the manufacturing cost.

Columnar bodies consisting of the central layer, which is the so-called reddish part of branch wood or raw wood with a relatively small diameter, are, for example, dead knots, rotten knots, etc. that appear on the surface of wood processing products such as pillars and boards.
It is suitably used as a filler to correct defective knots such as loose knots. Conventionally, when manufacturing such a columnar body, the outer part of the center layer of the circular cut material is cut with a machete or the like, and then cut into a columnar shape using a wood lathe or the like, or the circular cut material is This was done by direct turning using a wood lathe. However, in such conventional manufacturing methods, the machining allowance is too large, so it takes a lot of time and effort for finishing, making mass production completely impossible, and the manufacturing cost is high. It wasn't used that much.

The present invention is based on punching out the center layer of a circular cut material using a pushing tool and a cylindrical blade, and utilizes branches, etc., which can solve these problems. For the purpose of providing a method for manufacturing a columnar body, one embodiment thereof will be described based on the drawings.

1 to 9, the manufacturing method of the present invention uses a press device (4) comprising a pressing tool (2) and a cylindrical blade (3), and inserts a round cut material into the cylindrical blade (3). The columnar body (7) is manufactured by punching out the center layer portion (11) of (5) and finishing the peripheral surface (68) of the punched piece (0) as a tapered surface (7S), In this embodiment, a tapered surface is finished using a surface finishing machine (3).

The manufacturing method of the present invention will be described below with reference to the round cut material (5
), the press device (4), and the surface finishing machine (8), and then the first step of forming the punched piece (6), and the process of forming the punched piece (6).
0) and a second step of finishing the circumferential surface (68) as a tapered surface (78).

As shown in Fig. 1, the ring-cut timber (5) is a branch of various trees such as cypress or cedar, or a log with a relatively small diameter that is about the same thickness as a branch, preferably up to about 10 cm. Then, it is formed by cutting into rings with a length of up to about 30 cm using, for example, a circular saw, and the center is a so-called reddish part (including cases where there is some so-called white part at the periphery). It is preferable to select one in which the diameter of the layer portion (11) is larger than that of the desired columnar body (7). In this example, the thickness is approximately 3 cm, and due to cutting errors, both end surfaces (Sl) (S2) are formed at right angles to the axis (11) of the center layer (11). Use round cut timber). As shown in Figures 2 to 4, the press device (4) has a guide plate (13) installed upright on the base (12).
) is attached to the inner surface of one side plate (1 (0) of the U-shaped frame (15), which protrudes toward the other side plate (17), while the other side plate ( 17) A rectangular plate-shaped support plate (19) is fixed and erected close to the inner surface and parallel to the side plate (17). , attach the cylindrical blade (3). Note that the U-shaped frame (1υ is the oil cylinder (20
) to slide by expanding and contracting.

The pressing tool (2) has a cylindrical pressing rod (22) horizontally protruding from the center of a disk-shaped base plate (21) screwed onto one side plate (15). A relatively deep blind hole (25) is provided in the center of the distal end surface (23). The blind hole (25)
has a sharp tip and a retaining piece (2) at the base.
A nail-shaped body a (27) with a coil spring (29) interposed therebetween, and a nail-shaped body a (27) having a flat cap shape on the front end of the pressing rod (22). A lid (30) having a through hole (34) through which it can be inserted is screwed on.

Therefore, due to the biasing action of the coil spring (29), the nail state a
(27) has its retaining piece (26) in contact with the front surface of the lid (30) and normally protrudes from the lid (30). Note that the diameter of the pressing rod (22) should be larger than the diameter of the cylindrical blade (3), which will be described later, so that the circular cutting material (5) can be easily directed toward the cylindrical blade (3). Preferred for pressing.

As shown in Fig. 4, the cylindrical blade (3) has a cylindrical shape, and its tip is tapered so that the inner surface is smooth and the outer surface is tapered. (31), the base of which is provided with a flange (33) that is screwed onto the inner surface of the support plate (19) via a cushioning material (32) such as rubber.
) will be established. Note that the support plate (19) is equipped with the pressing rod (
A through hole (35) is formed, which is aligned with the axis of the cylindrical blade (3) and has a diameter approximately equal to the inner diameter of the cylindrical blade (3). When aligned with the through hole (35) and screwed, the cylindrical blade (3) and the pressing rod (22) are aligned with the axis (L2).
will match. The inner diameter of the cylindrical blade (3) is selected depending on the diameter of the desired columnar body (7).

Further, on the inner surface of the other side plate (17), an extruded rod (35) is fixed and protruded, through which the cylindrical blade (3) can be inserted and which can protrude from the tip of the cylindrical blade (3). Set up As in the case of the pressing rod (22), the extruding rod (36)
The coil spring (39) is inserted into the blind hole (37) recessed in the center of the
The nail-like body b (40) is installed with the extrusion rod (
36) At the tip, there is a through hole (
By screwing on the lid (42) having the bulge 41), the nail-shaped body b (40) is normally protruded from the lid (42) by the biasing action of the coil spring (39). Form.

The distance between the side plates (16) and (17) of the U-shaped frame (15) is approximately such that the extruded rod (36) is inserted into the cylindrical blade (3) and the other side plate (17) is connected to the support plate (19). a nail-shaped body a that protrudes from the pressing rod (22) and the extruding rod (36) when brought into contact;
Between the tips (27a) (40a) of b (27) (40),
The spacing is set to such an extent that the spacing is slightly larger than the thickness of the circular cut material (5). In addition, the coil springs (29) (39) connect the center layer portion (11) of the circular cut material (5) with the nail-like bodies a, b (27) (
40) When the coil springs (29) (39) are compressed by pressing against the tips (27a) (40a), the center layer portion (
11) with a spring constant sufficient to form a depression.

The hydraulic cylinder (20) is mounted on the outer surface of a mounting base (43) that is fixed and erected at a lateral position of the end of the guide plate (13) on the one side plate (16) side, parallel to the one side plate (16). The end of the rod (45) is pivotally connected to the base of one side plate (16). Therefore, the U-shaped frame (15) can slide as described above by the expansion and contraction of the hydraulic cylinder (20). In addition, the inner surface of the mounting base (43) and the other side plate (17) of the base (12)
At the side positions, one side plate (16) or the other side plate (
17) and stop members a, b (46) and (47) are arranged to stop the U-shaped frame (15). The stop member a (
46) stops the U-shaped frame (15) at the position where the other side plate (17) is the support plate (19), and also stops the stop member b (47).
) stops the U-shaped frame (15) at a position where the tip of the pressing rod (22) substantially contacts the tip of the cylindrical blade (3).

As shown in FIGS. 5 to 7, the surface finishing machine (7) has a rectangular plate-shaped sliding table (56) on a base (67) that slides back and forth by the operation of an air cylinder a (65). At the same time, on the sliding table (66), holders a (69) and holders b (70) for holding the inner extraction piece (6) are arranged on the left and right with an interval between them, and At the front position of the moving table (66), there is a rotary cutter (71) for finishing the circumferential surface (63) of the inner extraction piece (6) held by both the holders a and b (69) and (70) into a tapered surface. ). Further, on the lower surface of the sliding table (66), in the vicinity of both sides, there are guide tubes (73) that slide guide shafts (72) (72) arranged at intervals on both sides of the upper surface of the base (67). (73) is attached, and the slide table (56) moves back and forth by sliding of the guide tube (23). Also in the figure (75
) (76) are the front and rear end surfaces (77) (
78) to regulate the sliding stroke of the sliding member (66). There is, and the Nejisuke (81
) can be adjusted as desired by adjusting the length of the protrusion from the upright piece (30).

The air cylinder a (65) is fixed on the base (5) at the rear position of the slide table (56), and its rod (
32) The tip is pivotally attached to a hanging piece (83) (83) hanging down from the rear end of the lower surface of the sliding table (66), approximately in the center. Therefore, the sliding table (66) can be slid by its expansion and contraction.

Further, in this embodiment, a hydraulic cylinder (35) is installed in parallel with the air cylinder a (65), and the rod (36) is provided with a threaded portion over almost its entire length, and near its tip and base end. Attach lock nuts a, b (87) (8
9) Screw on. Also, both rods (82) and (86) are bridged by a joint piece (99). The joint piece (90) has a long piece shape, and one end thereof is fixed to the rod (32), and the rod (86) can be inserted through a through hole (99) formed at the other end side. As the air cylinder a (65) expands, the slide table (66) moves forward relatively quickly, and at the same time the joint piece (
90) advances toward the locking nut a (37), and at a slightly forward position where the sliding base (66) collides with the locking member c (75), the joint piece (90) and the locking nut a (87) After that, the air cylinder a (65) extends extremely slowly together with the hydraulic cylinder (35), and the sliding base (66) extends with the stop member e (95).
) will stop when it comes into contact with. Note that the locking nut a (
The mounting position of 87) is adjusted so that the joint piece (93) and the locking nut a (87) can abut each other immediately before the rotational force ivy (71) starts cutting the inner extraction piece (6). Also stop member e
The protrusion length of the screw shaft (81) of (75) is the same as that of the rotary cutter (
71) is regulated and adjusted to a predetermined protrusion length depending on the size of the columnar body (7) to be manufactured. On the other hand, due to the reduction of air cylinder a (65), the sliding table (
66) performs an operation opposite to that described above, and is stopped by colliding with the stop member d (76). Note that the hydraulic cylinder (85
) is contracted when the joint piece (90) collides with the locking nut d (89) and returns to its initial state.

The holder a (69) protrudes inward from a bearing (92) fixed to the left side of the top surface of the slide table (66) and holds the other end surface (6S2) of the punched piece (6). Holding shaft a (9
3), and the holding shaft a (93) is rotatable counterclockwise at low speed via a chain device (95). Moreover, the shaft diameter of the holding shaft a (93) is the same as that of the columnar body (7).
The diameter is set to be smaller than the diameter of the small diameter side, and the tip surface (95) has a positioning protrusion (97) in the center, as shown in FIG. 6
) are provided with claw pieces (99) that bite into one end surface (681) of each.

The holder b (70) has one end surface (6S1) of the punched piece (6) fixed to the bearing (1) on the right side of the top surface of the sliding table (66).
A holding shaft (101) holding the holding shaft (101) is supported so as to face the holding shaft a (93) and have their axes aligned with each other. The holding shaft b (101) can move forward and backward by expanding and contracting the air cylinder b (102) attached to the outer surface of the bearing (30), while the holding shaft b (101) has a In the same way as in the case, the protrusion (17) and the claw piece (99) are formed.

The rotary cutter (71) has four cutting blades (102) protruding from the periphery of a disc body at equal angular pitches, and has a base (67).
The bearing (103
) is fixed to the inner end of the rotating shaft (105),
It can be rotated counterclockwise at high speed via a belt device (103). The width of the cutting edge (102A) of the cutting blade (102) is
As shown in FIGS. 9(a) to (d), the tapered surface should be made slightly longer than the length of the punched piece (6), and the cutting edge (102A) should be formed on the punched piece (6). (7S), it is gently sloped.

Note that at the same time that the joint piece (90) collides with the locking nut a (37), the holding shaft a (93) starts rotating, and the joint piece (
The holding shaft a (93) is configured to stop rotating at the same time that the retaining shaft a (90) collides with the locking nut b (89).

Next, the method for manufacturing the columnar body (7) is shown in FIGS. 8(a) to (f) showing the first step, and FIGS. 9(a) to (f) showing the second step.
The explanation will be based on d).

First step: First, as shown in Fig. 8(a), with the one side plate (16) in contact with the stop member a (16), the cylindrical blade (3) is protruded from the extrusion rod (36). Nail b (48) tip (
40a) is applied to the end surface (S1) of the circular cutting material (5), and then the pressing tool (2) is gradually moved towards the cylindrical blade (3) by extending the hydraulic cylinder (20). Figure 8(b)
As shown in the figure, the one end surface (S2) of the circular cut material (5) comes into contact with the blade portion (31) of the cylindrical blade (3). After that, Figure 8 (
As shown in c), the tip (27a) of the nail-like body a (27)
The pressing tool (2) is brought closer to the cylindrical blade (3) until the tip (27a) comes into approximate contact with the other end surface (82) of the round cut material (5), and the tip (27a) is brought into contact with the center of the other end surface (S2). Position it so that it hits the center (01) of the layer part (11).

In this state, as shown in FIG. 8(d), when the round cut material (5) is pressed by the pressing tool (2), the nail-shaped body a (27)
moves backward against the biasing force of the coil spring blade, and at that time, the other end surface (6S2
) is formed with a depression (6a) that clearly defines the center (o1) of the central layer portion (11).

After that, when the circular cut material (5) is further pressed by the pressing tool (2), as shown in FIG. As a result of this action, a crack is generated at the periphery of the circular cutting material (5), making it easier for the cylindrical blade (3) to bite into the circular cutting material (5), and there is a center inside the cylindrical blade (3). The layer portion (11) is punched out while its peripheral surface (6S) is finished smooth by the blade portion (31). After the center layer part (11) is completely punched into the cylindrical blade (3), the other side plate (17)
collides with the stop portion b (47) and the U-shaped frame (15) stops. After that, when the hydraulic cylinder (20) is contracted, the eighth
As shown by the dashed line in Figure (f), the extrusion rod (36)
Extruding the punched piece (6) from the cylindrical blade (3),
As shown by the solid line in the same figure, after the punched piece (6) is discharged from the cylindrical blade (3), the one side plate (16) is removed from the stop a (
46), the U-shaped frame (15) stops. In addition, when extruding with the extrusion rod (36), the other end surface (6B
Similarly to case 2), there is also a nail-shaped body b (
40) forms a depression (6b) defining the center (O2) of the punching piece (6).

Approximately concentric annual rings appear on at least the other end surface (6S2) of the punched piece (6) formed in this way, that is, the surface that abuts the pressing rod (22), and the center thereof is on the other end surface. It is located approximately at the center of (6S2). Further, in this embodiment, the flange (33) of the cylindrical blade (3) is covered with a cushioning material (
Since it is screwed onto the support plate (19) with the buffer material (32) interposed, the punched piece (
6) It becomes possible to finish the peripheral surface even more smoothly.

2nd process First, as shown in FIG. 9(a), with the sliding fitting (66) in contact with the stop member c (75), the other end surface (6S2) of the punched piece (6) is Press the holding shaft a (93) so that the protrusion (97) of the holding shaft a (93) comes into contact with the recess (6a), and then punch out the holding shaft b (101) by extending the air cylinder b (102). One end surface (Sl) of piece (6)
The protrusion (97) touches the one end surface (6S).
Position the punched piece (6) so that it abuts the recess (6b) on the side 1), and hold the punched piece (6) by both holding shafts a, b (93) (101). ) bites into the punched piece (6), and the punched piece (6) reliably and its axis (L8) aligns with the axis (L) of the holding shafts a, b (93) (101).
4) is maintained.

Next, when air cylinder a (65) is extended, it slides together (65).
6) moves forward, and the joint piece (90) is attached to the locking nut a (87).
At the same time as the holding shaft a (93) collides with the holding shaft a (93), the holding shaft a (93) begins to rotate counterclockwise at a low speed, and the punched piece (6) also starts rotating together with the holding shaft a (93).

Thereafter, the punched piece (6) moves very slowly toward the rotating cutter (71) under the action of the hydraulic cylinder (85), and as shown in FIG. The rotating cutting blade (102) gradually cuts the sliding body, and as shown in FIG.
The cutting ends when it collides with the columnar body (75) and stops, and the columnar body (78) is finished with a smooth tapered surface (78) of a predetermined size.
7) is manufactured. After that, when the air cylinder a (65) is contracted, the joint piece (90) collides with the stop nut b (89), so that the rotation of the holding shaft a (93) is stopped and the slide table (66) becomes a stop member. It stops by colliding with d(76). Next, when the air cylinder b (102) is contracted, the holding shaft b (101) retreats, and at the same time the columnar body (7) falls, for example, into a storage container (not shown) placed on the base (57). do.

Note that at least the end surface (781) on the large diameter side of the columnar body (7)
), the annual rings appear almost concentrically.

Figure 10 shows the press device (4) used in the first step of the present invention.
Another example is shown in which a cylindrical blade (3) formed in the same manner as above is fixed to a support plate (19) fixed and erected on a base (12), and the hydraulic cylinder (20) is operated. This allows the pressing tool (2) to move forward and backward toward the cylindrical blade (3), and inserts the center layer part (1) of the round cut material (5) into the cylindrical blade (3).
1), and the punched pieces (6) are sequentially discharged from the base opening end (50) of the cylindrical blade (3). Note that (51) and (52) are stop members that restrict the movement process of the pressing tool (2), as described above.

In the second step of the present invention, in order to finish the peripheral surface (68) of the punched piece (6) as a tapered surface (78), surface finishing tools (53) and (55) illustrated in FIGS. 11 and 12 are used. You can also do that. The surface finisher (53) shown in FIG. 11 has a handle (56) (
The half pieces (59) (59) of a cylindrical body with a tapered inner surface are attached to the gripping parts (57) (57) of a pliers-shaped tool with the tips of the two (56) pivotally connected. facing each other and removably attached using screws (60), so that when the two half pieces (59) (59) are joined, the inner surface is formed as a tapered surface with various dimensions. By preparing half pieces (59) of various sizes in advance, the peripheral surface (6S) of the punched piece (6) can be finished into a predetermined tapered surface (7S). Further, the surface finishing tool (55) shown in FIG.
) (61) upper die 62) and lower die (63)
The punched piece (6) sandwiched between the recesses of the upper die (62) and the lower die (63) is compressed using the pressurizer to form a columnar body (7) of a predetermined size. Note that by heating the upper die (62) and the lower die (63) in advance to an appropriate temperature with a heater, the punched piece (6) can be compressed while being heated, and its finishing is facilitated. Further, the tapered surface (78) in the second step can be finished by various methods such as using a so-called wood cutting board or paper.

The columnar body (7) manufactured according to the present invention is the thirteenth (a) (
b) As shown in the figure, for example, a circular hole (b1) or a tapered hole (b2) is used as a filler and is formed by removing a defective knot part (a) of a pillar material, board material, etc. with a drill. ), and depending on its surface finish, it is possible to form an artificial node (c) in which annual rings appear approximately concentrically. Note that a columnar body (7
), use one in which the slope of the columnar body (7) is larger than the slope of the hole (b2),
Since the inner circumferential surface of the hole (b2) and the inner circumferential surface of the columnar body (7) are in substantially close contact with each other, the columnar body (7) is firmly and reliably embedded in the column material, plate material, etc. When used as a bed benefit as shown in Figure (b), even if the columnar body (7) is stepped on, there is no risk of it falling out because the hole (b2) has a tapered shape. At this time, adhesive may be applied to the circumferential surface of the columnar body (7) in advance, and in particular, the circumferential surface of the columnar body (7) (7S
) is provided with a narrow groove (107) as shown in FIG.
8), the peripheral surface (7) of the columnar body (7) is formed.
8) Ensures the retention of the adhesive applied to the adhesive and improves the adhesive strength. Note that the narrow groove (107) or the recess (10
8) means that when the columnar body (7) is press-fitted into the curved parts (b1) and (b2) and the surface is finished, the peripheral surface (7S) of the columnar body (7) is adjusted to the extent that no thin grooves (107) etc. appear on the finished surface. Small diameter end face (
7S2) to near the large diameter end face (781). Furthermore, as shown in FIG. 14, the narrow groove (107)
Near the inclined lower end of the cutting edge (102A) of the cutting blade (102), there are two auxiliary blades (106) in the shape of, for example, a sharp triangle.
(106) in advance, two narrow grooves (107) (107) are formed on the small diameter end surface (7S2) side of the circumferential surface (7S) of the columnar body (7). ) It can be formed by various methods, such as using a lathe that can form and engrave at the same time.

Note that the columnar body (7) is smaller than the inner diameter of the holes (b1) and (b2).
That is, if the diameter of the buried tree is too large, the first
Using the surface finishing tools (53) (55) shown in Figures 1 to 12,
The columnar body (7) can be compressed and finished into a wood insert having a diameter matching the holes (b1) and (b2).

As described above, the manufacturing method of the present invention uses a press device equipped with a pressing tool and a cylindrical blade, and punches out the center layer of a circular cut material into the cylindrical blade. Punching piece (6)
As a result of finishing the circumferential surface (6S) as a tapered surface (7S), the production efficiency of columnar bodies can be greatly improved, and the manufacturing cost is lower than when manufacturing columnar bodies using conventional machetes etc. can be significantly reduced.

As a result, for example, when the columnar body is used as a buried tree, it becomes possible to make extensive use of defective knot correction material, which has not been widely used due to manufacturing costs, etc., and can greatly contribute to resource saving. In addition to being used as the above-mentioned buried wood, the columnar body manufactured by the manufacturing method of the present invention uses the so-called reddish part, so it can be used for various containers, such as the stoppers of Western liquor bottles, by taking advantage of the softness of the natural wood. It can also be suitably used as a stopper for
It can also be used as a buried tree to hide the nail head, a wooden nail, or even as an accessory.

Further, according to the manufacturing method of the present invention, in addition to those in which the annual rings of the columnar bodies appear approximately concentric, those in which the annual rings appear eccentrically,
Furthermore, various columnar bodies, such as those partially having reddish portions, can be manufactured.

In addition, in the manufacturing method of the present invention, in addition to a cylindrical blade, a polygonal cylinder such as a rectangular, hexagonal, or octagonal blade can be used as the cylindrical blade. The material may be shorter than the thickness of the round cut material as long as it can punch out the center layer of the material. Furthermore, if a relatively thin-walled cylindrical body is used as the cylindrical blade,
The tip becomes a sharp blade. Note that the blade portion may be formed as a discontinuous blade portion having an appropriate notch, and the pressing tool may be used in the embodiments as long as it can press the circular cutting material toward the cylindrical blade. It is not limited to the cylindrical shape shown. Furthermore, the pressing tool and the cylindrical blade can be brought close to each other, or both can be brought close to each other, contrary to the case of the embodiment. This can be done by various means.

Furthermore, by preparing cylindrical blades with various diameters in advance, it is possible to form punched pieces with various diameters depending on the diameter of the central layer of the wood. columnar bodies can be manufactured. In addition, at that time, it is preferable that the pressing area of the pressing tool is also changed according to the diameter of the cylindrical blade so that it becomes larger than the diameter of the cylindrical blade. In addition, if the thickness of the cut material is made extremely large, for example about 30 cm, it is possible to manufacture long columns, and by cutting the material into rings, it is also possible to obtain a large number of short columns. can.

[Brief explanation of the drawing]

FIG. 1 is a perspective view illustrating a round cut material, FIG. 2 is a perspective view illustrating a press device, and FIG. 3 is an exploded perspective view showing a pressing tool.
4 is an exploded perspective view showing a cylindrical blade and an extrusion punch, FIG. 5 is a perspective view illustrating a surface finisher, FIG. 6 is a line diagram showing its drive system, and FIG. 7 is a holding shaft a. Perspective view showing b, Fig. 8(a
) to (f) are process diagrams showing the first step, and Fig. 9(a) to (
d) is a process diagram showing the second step, FIG. 10 is a sectional view showing another example of the press device, FIG. 11 is a perspective view illustrating a surface finishing tool, and FIG. 12 is another example of the surface finishing tool. 1st cross-sectional view showing
3(a) and 3(b) are perspective views illustrating a method of correcting a defective knot using a columnar body, and FIG. 14 is a plan view showing another example of the cutting blade together with the columnar body. (2)-. Pressing tool, (3)...Cylindrical blade, (5)...
Round cutting material, (6)...Punching piece, (11)...Center layer part, (22)...Press rod, (11)...Blade part, (6S
)...peripheral surface, (7S)...tapered surface.

Claims (1)

[Claims] (1) The center layer of the round cut material made by cutting raw wood with a relatively small diameter into rounds to a predetermined thickness is used with a pressing tool and a cylindrical blade with a sharp blade at the tip. After sandwiching the piece with the cylindrical blade, the cylindrical blade and the pressing tool are brought relatively close to each other to ladle the center layer into the cylindrical blade, and then the peripheral surface of the punched piece is A method for manufacturing a columnar body using branch wood, etc., characterized by forming a columnar body into a tapered surface.