JPS61288908A - Manufacturing device for hollow lumber - Google Patents

Abstract

PURPOSE:To enable a lumber to be hollowed and effectively dried, by turnably supporting the lumber to a supporting bed, provided in one side of the long sized base frame, and boring a hole by a cutter in the point end of a rotary rod in a longitudinally movable cutting device provided in the other side of the frame. CONSTITUTION:A lumber B is mounted onto a lumber supporting bed 4 and clamped by width direction clampers 41, 42, etc. while the lumber is aligned, and a device, vertically adjusting the supporting bed 4 by a handle 18, clamps the lumber by a vertical direction clamper 50. Next the device, turning a rotary rod 70 by a motor 96 and jetting compressed air through a hose 95 by a boring cutter 71 provided in the end of the rod 70, drills the lumber B by moving bearing supporting trucks 85, 86, and a chip of wood is discharged from a clearance between a hole and the rod 70. After the lumber is bored to its intermediate position, the device, retracting the rod 70 to be removed from the lumber B while 180 deg. turning the supporting bed 4 and drilling the lumber similarly to the above from the other end, enables a hollow lumber to be formed.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an apparatus for manufacturing hollow timber for use in construction etc. from natural wood.

(B) Conventional Technology In recent years, natural logs and lumber are increasingly being used in their original state as the main pillars or exterior and interior materials of various buildings. However, in order to prevent cracks from occurring, vertical grooves are formed in advance, or predetermined drying means are applied to ensure sufficient drying in order to eliminate problems caused by cracks in logs as much as possible.

(c) Problems to be solved by the invention However, no matter how dry natural logs are, they will crack after many years of use, spoiling their appearance, and decreasing their strength, making it difficult to use them as beam materials, etc. The reason for this is that drying occurs only from the outside surface of the log, and the only way to overcome this drawback is to dry the inside and outside of the log. However, in reality, drilling a hole in the center of a log and blowing hot air into the hole is the most effective method. This was extremely difficult, especially mechanized drilling equipment.

(d) Means for Solving the Problems In this invention, a lumber support frame for clamping and supporting lumber on the upper part is rotatably attached to one side of a long base frame, and the lumber support frame is rotatably attached to the other side of the same base frame. It is an object of the present invention to provide an apparatus for manufacturing hollow timber, characterized in that a boring device is mounted which moves a rotary rod having a boring cutter at its tip forward and backward toward the timber.

(E) Function In this invention, after a log or other lumber is clamped and supported on a lumber support frame, the boring device is driven to advance the rotary rod toward the lumber, and the lumber is removed from the center of one end surface of the lumber. Once the hole has been bored to approximately the center of the length of the timber, the timber support frame can be rotated as necessary, the timber can be bored from the other end, and the hole has been bored to approximately the center of the length of the timber. A hollow lumber is manufactured by making the holes from both end faces communicate with each other at approximately the center of the length.

(f) Effects According to the present invention, by configuring the apparatus for producing hollow timber as described above, even long timber can be bored accurately and without causing cracks or the like. , it is possible to easily and accurately dry the hollowed timber by blowing hot air into the hollow part and the outer surface thereof, and the drilling process can be carried out mechanically as a preliminary process for performing such a high-level drying method. Since it can be done easily, high quality hollow timber can be easily manufactured.

(g) Examples Hereinafter, the present invention will be specifically explained based on examples shown in the attached drawings.

In addition, FIG. 1 is a front view of the hollow timber manufacturing apparatus according to the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a cross-sectional view taken along line I-I in FIG. 1, and FIG. - Sectional view along line 4, 5th
The figure is a perspective view of a hole-boring cutter provided at the tip of a rotary rod, and FIG. 6 is an explanatory view of the working state of hole-boring by the cutter.

In Figures 1 and 2, (1) shows the entire hollow timber manufacturing equipment, and the equipment (1) essentially consists of a long base frame installed on the floor (2). (3) and the same base frame (3
) A timber support frame (4) is rotatably attached to the upper surface of one half (the left half in the drawing), and a timber support frame (4) is installed on the other half (the right half in the drawing) of the same base frame (3). Hole drilling equipment (5
).

In such a configuration, the base frame (3) of the timber support frame (4)
The mounting structure is shown in detail in FIG.

In Fig. 3, (10) is a sliding stand attached to the upper surface of the base frame (3) so as to be slidable (moveable) in the longitudinal direction, and the sliding stand (10) has an opening in the center. An upper fixed cylinder (11) and a lower fixed cylinder (12) are attached concentrically to the same opening. (13) is a rotary shaft rotatably disposed within the lower fixed cylinder (12), and a bevel gear (14) is fixed to the lower end of the rotary shaft (13).

Further, (15) is a pinion gear that meshes with the bevel gear (14), and the pinion gear (15) is connected to the bearing (16).
is fixed to the tip of a rotating shaft (17) rotatably disposed on the back surface of the sliding table (10).

On the other hand, an operating handle (18) is attached to the base end of the rotating shaft (17).

Further, (19) is an elevating screw shaft whose lower part is screwed to the rotating shaft (13) and whose upper part is inserted upward through the sliding table (1o) and the upper fixed cylinder (11). Rotation of the screw shaft (19) is regulated by a fixed key (20) that is integral with the upper fixed cylinder (11).

With this configuration, when the operating handle (18) is rotated, the rotating shaft (13) is rotated via the rotating shaft (17), pinion gear (15), and bevel gear (14), and this rotation causes the lifting screw shaft (19) to rotate. It will go up and down.

In addition, (30) is a swing catch fixed to the upper end of the elevating screw shaft (19), and a timber support frame (
4) is attached via a swivel base (31) so as to be freely rotatable on a horizontal surface.

As shown in FIGS. 1, 2 and 3, the timber support frame (4) has front, middle and rear widthwise clamping devices (40) spaced apart on its upper surface.

(41) and (42) are installed.

Each clamping device has a similar structure, and as shown in FIG.
a pair of clamp plates (43) that are expandable and retractable in the width direction.
, (44), both clamp plates (43), screw tubes (45), <46) fixed to the lower surfaces of (4, 4), and the inside of the timber support frame <4) are inserted horizontally, and the screws are inserted. Tube (45), (46)
It consists of a screw shaft (47) that is screwed together with the screw shaft (47), and an operation handle (48) attached to one end of the screw shaft (47).

With this configuration, when the operating handle (48) is rotated, both the clamp plates (43) and (44) are laterally separated from or approached each other via the screw shaft (47) and the screw tubes (45) and (46). 1 (B) can be clamped.

Further, (50) is a vertical clamp device disposed in the center of the base frame (3), and in this embodiment, the clamp device (50) is mounted on a mount (50) on the upper surface of the center part of the base frame (3). 51
) is erected, and a screw case (53) is attached to the front surface of the pedestal (51) via an intermediate member (52).
3) A pair of screw shafts (54) and (55) with opposite screw directions are provided with an interval in both width directions, and each screw shaft (54)
, (55) and upper and lower clamp plates (56), respectively.

(57) are connected via a screw cylinder, and the same screw shaft (54),
(55) are connected by an endless chain for synchronization (58), and the upper end of the first side screw shaft (54) is connected to the frame (51).
The rotary motor (59) is connected to the output shaft of a rotary motor (59) attached to the top surface of the rotary motor (59).

With this configuration, when the rotary motor (59>) is driven, the upper and lower clamp plates (56) and (57) move in the direction of moving away from each other or toward and away from each other via the screw shafts (54) and (55) and the screw tube. , the timber (B) can be clamped from above and below.

Further, (60) is a moving mechanism for moving the timber support frame (4) in the longitudinal direction with respect to the base frame (3), and in this embodiment, the moving mechanism (60) is An endless chain (63) that winds between the sprocket wheels (61) and (62) is installed inside the frame and located below the timber support frame (4), and a connecting bracket is attached to the endless chain (63). (64) to connect the sliding base (10) and roughly connect the sprocket wheel (6) to the operating handle (
65) by fixing it.

With this configuration, when the operating handle (65) is rotated, the sliding base (10) and the timber support frame (4) that is integrated therewith are moved in the longitudinal direction relative to the base R (3). .

In FIG. 1, (66) is a long hole provided in the base frame (3) to enable movement of the operating handle (18) as the sliding table (10) moves.

Next, the drilling device (5) installed on the other side of the base frame (3)
) will be explained.

In FIGS. 1 and 2, (70) is a hollow rotating rod with a hole cutter (71) attached to its tip and placed on the base frame (3) at a required parallel interval. The tip, middle, and base ends of 70) are a front bearing (72), an intermediate bearing (73), and a rear bearing (74) provided on the frame (51), respectively (the rear bearing (74) has a built-in deceleration mechanism). It is rotatably supported by

FIG. 5 shows the detailed configuration of the hole cutter (71), where 75 is a wood waste discharge passage formed along the entire length of the circumferential surface of the cutter body 76) and cut into a fan-shaped cross section. , (77) is a compressed air supply path bored over the entire interior length of the cutter body (76), and the compressed air supply path opens (78) at the sharp tip of the cutter body (76), and The sharpened tip surface of the cutter main body (76) is such that the center of the sharpened tip is eccentrically located, and the tip opening of the fan-shaped notch wood waste discharge path (75) is located eccentrically. The opening (78) is located in the eccentrically spaced direction, so that the opening (78) of the compressed air supply channel is located in the gap (S) at the end during the drilling operation.
) is in communication with the wood waste discharge path (75).

In FIG. 6, (79) is a compressed air supply hole formed in the hollow rotating rod (70) and communicating with the compressed air supply path (77).

Furthermore, as shown in Fig. 6, the diameter of the cutter body (76) is smaller than that of the rotating rod (70). The wood waste discharge space (81) is located between the outer peripheral surfaces of (70).
) is formed.

Furthermore, in FIGS. 1 and 2, (85).

(86) are bearing support carts that are equipped with intermediate bearings (73) and (74), respectively, and can move forward and backward in the longitudinal direction on the base D (, +) along the guide rail (87). )
, (86) are connected to an endless chain (90) disposed within the base frame (3) at locations located below the connecting brackets (88) and (89). Furthermore, (91).

(92) is a sprocket wheel around which the endless chain (90) is wound, and (93) is a tightener.

In addition, (94) is mounted on the bearing support cart (86),
Flexible air hose for conveying compressed air (95)
(96) is a rotary joint that connects the rotating rod (70), and (96) is similarly mounted on the bearing support truck (86), and transmits rotational force to the rotating rod (70) via pulleys (97) and (98). ) is a rotating motor that transmits power to the

With this configuration, when the endless chain (90) is driven manually or automatically, the bearing support carts (85), (8
6), the rotating rod (7o) integrated with the intermediate support bearing (73) and the rear bearing (74) will also move towards the timber (B). On the other hand, the rotating rod is driven by the rotating motor (96). (70) will rotate around its axis.

Note that (100) is an overhead wire installed above the hollow rotating rod (70) by struts (101) and (102), and an air hose (95) is suspended from the overhead wire (100).

Next, the drilling operation performed by the hollow timber manufacturing apparatus having the above configuration will be specifically explained.

First, the lumber (B) is placed on the lumber support frame (4), and the lumber (B) is placed on the width direction clamping device (4) while aligning the lumber (B).
0), (41), and (42).

The operating handle (18) is driven to perform the necessary vertical center adjustment, and the vertical clamping device ff1 (50) is used to firmly clamp it.

The rotating rod (70) is then rotated by the rotating motor (96).
While rotating, compressed air is ejected from a hole cutter (71) provided at the tip of the rotating rod (70) via an air hose (95).

In this state, the bearing support carts (85) and (86) move,
The timber (B) is sequentially bored by the boring cutter (71) of the rotating rod (70).

In this drilling operation, wood chips are effectively discharged to the outside through the wood chip discharge path (75) and the wood chip discharge space (81).

After that, after drilling the hole to the intermediate position, - the rotary rod (
70) and move the hole cutter (71) to the lumber (B).
), rotate the timber support frame (4) 180°,
The other end of the timber (B) is placed opposite the hole cutter (71).

Next, the rotary rod (70) is advanced in the manner described above, and a drilling operation is performed to form a hollow timber that is hollow over the entire length.

In addition, in the above drilling work, the bearing support cart (85)
When it reaches the front end of the endless chain (90), it separates from the endless chain (90) and does not impede the subsequent movement of the bearing support cart (86).

Moreover, when the bearing support cart (86) is located, the bearing support cart (85) is repositioned as the endless chain (90) retreats.
) will engage with the endless chain (90).

[Brief explanation of drawings]

Fig. 1 is a front view of the hollow timber manufacturing apparatus according to the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a sectional view taken along line I-I in Fig. 1, and Fig. 4 is Fig. 1 - 5 is a perspective view of a hole cutter provided at the tip of the rotary rod, and FIG. 6 is an explanatory view of the working state of hole boring by the cutter. (3): Base frame (4): Timber support frame (5): Hole processing device (70): Rotating rod (71): Hole cutter (B) Two pieces of wood

Claims (1)

[Claims] 1) Attach lumber (B) to the top of one half of the long base frame (3)
A lumber support frame (4) for clamping and supporting the lumber is rotatably attached, and a rotary rod equipped with a hole cutter (71) at the tip facing the lumber (B) is attached to the other half of the base frame (3). A hollow lumber manufacturing device characterized in that a boring device (5) having a protruding hole (70) is placed thereon so that it can move forward and backward.