JP3517337B2 - Automatic plane machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic plane which transmits the rotation of a drive shaft to a pair of screw shafts screwed to an elevating body via a bevel gear transmission mechanism to move the elevating body up and down. is there.

[0002]

2. Description of the Related Art In a conventional automatic plane, a pair of screw shafts are rotatably provided on both sides of a main body, and an up-and-down moving body which is vertically movable on the main body is screwed onto the screw shafts. The drive shafts that are horizontally installed on the main body are connected to both screw shafts via the bevel gear transmission mechanism, and the drive shafts are rotated by a motor or manually to rotate both screw shafts. , The lifting / lowering body can be moved up and down by screw feeding. However, in an automatic plane with such a configuration, the left and right bevel gears must be phase-matched at the time of assembly, and the assembly is cumbersome. However, there is a problem that the height of the threaded portion of the lifting body is different between the left and right, and the lifting body is tilted. Therefore, in Japanese Utility Model Publication No. 3-7122,
At least one of the bevel gears provided on the drive shaft side is provided so as to be slidable in the axial direction, and in the normal state, this is fixed to the drive shaft by a key and a retaining ring. If it occurs, remove the retaining ring and slide the bevel gear to temporarily disengage the bevel gear on the screw shaft side, and rotate only the free screw shaft to correct the tilt of the lifting body. A device is disclosed.

[0003]

However, in the technique disclosed in the above publication, since the bevel gear is slid inside the guide member to disengage the bevel gear, the left and right heights must be disassembled to some extent. Adjustment is not possible, and it takes a lot of time to reduce workability during assembly. Further, in order to slide the bevel gear with respect to the drive shaft, a lot of extra structures such as formation of an annular groove on the drive shaft, addition of a retaining ring, and a key are required, resulting in a high cost.

In view of the above, the invention according to claim 1 provides an automatic plane which allows height adjustment of an elevating body with a simple structure and a simple procedure without impairing workability during assembly. It is intended.

[0005]

In order to achieve the above object, the invention according to claim 1 is characterized in that any one bevel gear provided on the drive shaft in the pair of bevel gear transmission mechanisms is While the meshed state is maintained, the drive shaft is loosely integrally fitted only for rotation, the drive shaft is provided slidably in the axial direction, and at least one end of the drive shaft on the outer surface of the main body is further provided. On the side, a closing portion that restricts the slide of the drive shaft by fixing to the outer surface of the main body is detachably provided, and by releasing the fixing of the closing portion, the sliding operation of the drive shaft from the outer surface of the main body is possible. It is characterized by that. In addition to the object of claim 1, the invention according to claim 2 further comprises a bearing part for supporting the end part of the drive shaft, in order to reasonably configure the closed part. It was done.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Figure 1 is an overall explanatory diagram of the automatic plane 1,
FIG. 2 is a partial explanatory view of the lower part of the bed 2. Gearboxes 3 and 3 are fixed to both sides of the lower part of the bed 2 so as to project, and bearing holders 4 and 4 fixed to the upper parts of the gearboxes 3 and 3 are attached. , Thrust ball bearings 5 and 5, respectively
The screw shafts 6 and 6 are rotatably provided via the. on the other hand,
Above the bed 2, a head 7 having an inverted U-shaped cross section is arranged so as to cover the upper surface and the left and right side surfaces of the bed 2, and nut portions 9 and 9 fixed to the left and right end portions 8 and 8 of the head 7, respectively.
However, the head 7 is supported by being screwed into the screw shafts 6 and 6, respectively. In addition, 10 and 10 are pins for retaining upwards fitted to the screw shafts 6 and 6, 11 is a material feeding roller provided on the bed 2, and 12 is a motor and a belt transmission mechanism (not shown). It is a plane blade whose rotation is controlled by. Moreover, FIG.
As also shown in FIG. 3, a drive shaft 13 is horizontally laid on the lower portion of the bed 2, and a small diameter portion 13a formed at one end side (left side in FIGS. 1 and 2) is pivotally supported by a ball bearing 14. The bevel gear 1 that protrudes into the gear box 3 and meshes with the bevel gear 15 fixed to the lower end of the left screw shaft 6 in the gear box 3 from the right side in an orthogonal manner.
6 and a sleeve 17 interposed between the bevel gear 16 and the ball bearing 14 to restrict the slide of the bevel gear 16 are loosely inserted. The bevel gear 16 and the drive shaft 13 are integrally rotated only by a key 18, and the inner periphery of the sleeve 17 has a recessed portion 17a for allowing the key 18 to enter by sliding the drive shaft 13 described later.
Are installed around.

On the other hand, on the other end side of the drive shaft 13 (right side in FIGS. 1 and 2), the bevel gear 20 fixed to the lower end of the right screw shaft 6 is attached to the small diameter portion 13b at the tip protruding into the gear box 3. And a bevel gear 21 that meshes with each other at right angles
Is loosely inserted through the key 22 so as to be integrally rotatable, and the end portion of the small diameter portion 13b has the bearing box 2 as a closed portion.
It is pivotally supported by a ball bearing 24 which is held by No. 3. The ball bearing 24 is prevented from coming off by a flat washer 25 attached to the small diameter portion 13b and a hexagon socket head cap bolt 26. Therefore, the bearing box 23 is fitted into the square hole 3a on the side of the gear box 3 with the insertion portion 23a which is slightly smaller, and the hexagon bolts 27, 27.
By fixing to the gear box 3 by
The shaft support of 3b and the slide regulation of the bevel gear 21 are maintained. An elevating motor 28 is arranged in the bed 2 in parallel with the drive shaft 13, and a belt stretched between a sprocket 29 fixed to the motor shaft and a sprocket 30 fixed to the drive shaft 13. By 31,
The rotation of the lifting motor 28 can be transmitted to the drive shaft 13. It should be noted that tubular covers 32, 32 for protecting the screw shafts 6, 6 are mounted above the nut portions 9, 9 respectively, and bearing covers 4, 4 are provided under the nut portions 9, 9 respectively. The bellows 33, 33 are connected between each other.

In the automatic plane 1 constructed as described above, when the drive shaft 13 is rotated by the drive of the lifting motor 28, the bevel gears 16 and 21 at both ends are rotated in synchronization with each other.
The bevel gears 15 and 20 on the side of the screw shafts 6 and 6 that mesh with each other are rotated, and the screw shafts 6 and 6 are rotated in synchronization. By the rotation of the screw shafts 6 and 6, the nut portions 9 and 9 are screw-fed in the axial direction, and the head 7 integrated with the nut portions 9 and 9 moves up and down. When the automatic tuning board 1 is assembled or used after the assembly, when the tuning of the nut portions 9, 9 is broken and the head 7 is tilted, the hexagon in the gear box 3 on the right side of FIG. By removing the bolts 27, 27, ... and releasing the fixation of the bearing box 23 to the gear box 3, the drive shaft 13 is moved to the right side together with the bearing box 23, the ball bearing 24, and the bevel gear 21, as shown in FIG. Bevel gear 2 by pulling and sliding
1 and the bevel gear 20 on the screw shaft 6 side can be disengaged. At this time, on the left side of the drive shaft 13, the key 1
Although the slide of the drive shaft 13 is allowed by the entry of the groove 8 into the recessed portion 17a, the slide of the bevel gear 16 is restricted by the sleeve 17, and the engagement with the key 18 cannot be released. , Bevel gears 15 and 1 here
The meshing of the six members is maintained. Therefore, drive shaft 1
When 3 is rotated, only the bevel gear 15 can be rotated and only the nut portion 9 on the left side can be screwed (or the drive shaft 13 can be left as it is and the screw shaft 6 on the right side which is free).
It is possible to correct the inclination of the head 7 only by rotating only).

When the inclination of the head 7 is eliminated, the drive shaft 13
With bearing box 23, ball bearing 24
Slide the bevel gears 20 and 21 into the bed 2.
When the bearing boxes 23 are fixed by the hexagonal bolts 27, 27 ..., The correction of the inclination of the head 7 is completed. In addition, the insertion portion 2 of the bearing box 23
The length in the sliding direction in 3a is the bevel gear 20,
Since a dimension longer than the stroke required to release the meshing between the 21 is set, a stable sliding and rotating operation can be performed without the shaft center being shaken by the sliding operation of the drive shaft 13. As described above, according to the above-described embodiment, it is possible to easily correct the left and right heights of the head 7 from the outside of the bed 2 only by tightening and removing the hexagon bolts 27, 27. Even if the head 7 is assembled with a register and the height is adjusted after assembling, the work can be quickly performed with good workability. In addition, since no special processing or many parts are required for this height adjustment, the cost increase due to the adoption of these structures can be minimized. In particular, here, the closed portion is also used as the bearing box 23, so that the bearing box 23 is mounted so that the bearing of the drive shaft 13 and the slide regulation are simultaneously completed.

In the above embodiment, the drive shaft 13 is pulled to disengage the bevel gears from each other. However, the engagement between one of the bevel gears is released by pushing the drive shaft 13 which becomes free by releasing the closed portion. The structure may be such that the closing portions may be provided on both end sides of the drive shaft 13. Further, the closed portion does not also serve as the bearing box 23 serving as the bearing portion, and the bearing of the drive shaft 13 is used as the bevel gear 2
It may be a plate that is disposed inward of No. 1 and only has a function of restricting the slide of the drive shaft 13 and exposes the end portion 13b of the drive shaft 13 by detaching from the gear box 3. Furthermore, the present invention is an automatic plane including a drive shaft that synchronizes the rotation of the left and right screw shafts via a pair of bevel gear transmission mechanisms. The same can be applied to a structure in which the head is installed above a bed in which the head is installed, or a structure in which the drive shaft is rotated and controlled by a handle to manually raise and lower the head.

[0011]

According to the first aspect of the present invention, the left and right heights of the lifting body can be adjusted by simply sliding the drive shaft from the outside of the main body simply by attaching and detaching the closing portion. Therefore, even if the automatic plane is first assembled without considering the height adjustment and then the automatic plane is adjusted, the work can be quickly performed with good workability. In addition, it does not require any cost because it does not require many special processes or parts for height adjustment. Further, according to the invention of claim 2, in addition to the effect of claim 1, since the closing portion also serves as the bearing portion of the drive shaft, the bearing of the drive shaft and the slide regulation are mounted on the outer surface of the main body. It becomes a rational composition that and are completed at the same time.

[Brief description of drawings]

FIG. 1 is an overall explanatory view of an automatic plane.

FIG. 2 is an explanatory diagram of a drive shaft portion.

FIG. 3 is an explanatory diagram showing a state where a drive shaft is slid.

[Explanation of symbols]

1 ... Automatic plane, 2 ... Bed, 3 ... Gearbox,
6 ... Screw shaft, 7 ... Head, 9 ... Nut part, 13 ...
.Drive shafts, 15, 16, 20, 21 ... Bevel gears, 2
3 ... Bearing box, 27 ... Hexagon bolt, 28
..Lifting motors

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Claims (2)

(57) [Claims] 1. A pair of screw shafts screwed to an elevating body, a drive shaft installed between the screw shafts, and a drive shaft provided between the drive shaft and each of the screw shafts on the main body side. An automatic plane including a pair of bevel gear transmission mechanisms each capable of transmitting rotation of a drive shaft to the screw shaft, wherein either one of bevels provided on the drive shaft in the pair of bevel gear transmission mechanisms. A gear is loosely fitted integrally with the drive shaft only in rotation while keeping the meshed state, while the drive shaft is provided slidably in the axial direction, and further, at least one of the drive shafts on the outer surface of the main body. A closing portion that restricts the slide of the drive shaft by being fixed to the outer surface of the main body is detachably provided on one end side, and the operation of sliding the drive shaft from the outer surface of the main body is performed by releasing the fixing of the closing portion. It is characterized by enabling Dynamic planer. 2. The automatic plane board according to claim 1, wherein the closed portion is a bearing portion that axially supports the end portion of the drive shaft.