JPH10103444A - Linearly moving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust finely a table position on a screw shaft without using a circuit for step feed. SOLUTION: In a linearly moving device a larger diameter disk 5 is coaxially fixed to a screw shaft 33 connected to a table 4. The disk 5 is a spur gear, and gear teeth 52 are formed with equal angle each other on its outer circumference face. When the disk 5 is rotated around its axis with your fingertip, the screw shaft 33 rotates and the table 4 moves. Therefore, the position of the table 4 be finely adjusted even if the circuit for step feed is not used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear moving device having a screw shaft for linearly moving a table. More specifically, the present invention relates to a structure for manually performing fine adjustment of a table position.

[0002]

2. Description of the Related Art A linear moving device of a type in which a table engaged with a screw shaft linearly moves on the screw shaft with the rotation of the screw shaft is used for a consumer device, such as driving a focus lens such as an 8 mm movie or a floppy disk. It is used for moving magnetic heads such as disk drives. Further, the above-mentioned linear moving device is also used for industrial equipment such as FA, etc. In the case of this industrial equipment, the device itself is large. Is to be assembled by the user. In any case, fine adjustment is required for the table position on the screw shaft.

[0003]

In performing such fine adjustment, it would be convenient if the screw shaft could be manually turned to move the table on the screw shaft. There are no structural considerations in doing this. For this reason, the screw shaft cannot be directly operated by hand, especially when the linear moving device is reduced in size to be placed on the palm. Therefore, in such a case, a circuit for step feed is added to the drive circuit of the stepping motor,
It is inconvenient since there is no way to finely adjust the table position on the screw shaft only by rotating the stepping motor one step at a time.

An object of the present invention is to solve the above problems and to provide a linear moving device capable of finely adjusting the position of a table on a screw shaft manually without using a step feed circuit.

[0005]

In order to solve the above-mentioned problems, the present invention provides a table having a screw shaft, an engaging portion for engaging with the screw shaft, and rotating the table by rotating the screw shaft. In a linear movement device having a stepping motor that linearly moves on the screw shaft, an operation unit for manually rotating the screw shaft is connected to the screw shaft.

In the present invention, since the screw shaft is provided with a manual operation unit, the table can be moved by manually rotating the screw shaft. Therefore, the table position can be finely adjusted without using the step feed circuit.

[0007] In the present invention, the operation section may be configured as a large-diameter disk attached to the screw shaft. With this configuration, the screw shaft rotates together with the disk, so that the table can be adjusted by manually operating the disk. Also, since the disk is formed with a large diameter, the disk can be rotated with a fingertip even if the device is downsized, and the screw shaft can be rotated with a small force because the disk has a large diameter. it can.

In the present invention, the operation portion may be formed as a groove for inserting a driver shaft formed on at least one of both end surfaces of the screw shaft. With this configuration, it is possible to finely adjust the table position by rotating the screw shaft with a screwdriver. Further, since the screw shaft is rotated by the driver, the screw shaft can be rotated with a small force.

In the present invention, the operation unit includes:
It is preferable that an index for adjusting the angular position of the operation unit to the angular position corresponding to the step angle of the stepping motor is formed. With such a configuration, the feed amount of the table can be confirmed only by looking at the index when operating the operation unit, so that the table can be accurately positioned.

In the present invention, there is provided a pair of support plates for rotatably supporting both ends of the screw shaft, and a guide shaft for supporting the table disposed therebetween is fixed to the support plates. Preferably, a stepping motor is attached to one of the support plates.

[0011]

Embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1) FIG. 1 is a perspective view showing a linear moving apparatus according to Embodiment 1 of the present invention.

As shown in FIG. 1, the linear moving device 1 of this embodiment comprises a table 4 and a screw shaft 33 penetrating the table 4.
And a stepping motor 3 for rotating the screw shaft 33;
It is generally constituted by guide shafts 61 and 62 arranged in parallel with the screw shaft 33 so as to pass through the table 4. These constituent members are formed on a frame 2, and the frame 2 is composed of a bottom plate 21 disposed horizontally and support plates 22, 23 rising vertically at both ends of the bottom plate 21.

The screw shaft 33 is connected to the support plate 22 of the frame 2,
23, a rotatable screw groove 331 is formed on the outer peripheral surface. A screw groove (not shown) for screwing with the screw groove 31 is formed on the inner peripheral surface of the hole 42 of the table 4 through which the screw shaft 33 penetrates. Has become.

The screw shaft 33 is integrated with the output shaft 31 of the stepping motor 3 mounted on the outer surface of the support plate 22. Therefore, when a driving pulse is supplied to the stepping motor 3 via the cable 32 to drive the stepping motor 3, the screw shaft 33 rotates around the axis. When the screw shaft 33 rotates, since the table 4 is engaged with the screw shaft 33, the table 4 linearly moves on the screw shaft 33 as shown by the arrow A.

Here, guide shafts 61 and 62 arranged in parallel with the screw shaft 33 pass through the table 4 so that the table 4 does not rotate with the screw shaft 33. Both ends of the guide shafts 61 and 62 are fixed to support plates 22 and 23, and slidably support the table 4.

In the linear moving device 1 configured as described above, it is necessary to finely adjust the position of the table 4 on the screw shaft 33. However, when the overall length L of the linear moving device 1 is reduced to 40 mm to 50 mm, the screw shaft 33 cannot be rotated by direct contact with the hand. In addition, when the position of the table 4 is finely adjusted, a method for adding a step feed circuit to the drive circuit of the stepping motor 3 and rotating the stepping motor 3 one step at a time to adjust the position of the table 4 is inconvenient. is there.

Therefore, in the present invention, the operation unit 7 for manually rotating the screw shaft 33 is connected to the screw shaft 33. That is, in the present embodiment, the large-diameter disk 5 as the operation unit 7 is coaxially fixed to the screw shaft 33 at a position close to the support plate 23. Here, a part of the outer peripheral surface of the disk 5 protrudes above the upper end surface 231 of the support plate 23 and can be manually turned. The disk 5 is a spur gear, and teeth 52 are formed at equal angular intervals on the outer peripheral surface. Of these teeth 52, those at an angular position corresponding to the step angle of the stepping motor 3 are provided with a marking 53 (index). On the other hand, a reference line 531 for alignment with the marking 53 is provided on the upper edge of the support plate 23.

In the linear moving device 1 constructed as described above, the position of the table 4 can be finely adjusted by operating the outer peripheral surface of the disk 5 projecting upward from the upper end surface 231 of the support plate 23 with a fingertip. Is rotated in the circumferential direction. In this case, the screw shaft 33 rotates together with the disk 5, so that the table 4 can be moved. Therefore, since the position of the table 4 can be finely adjusted without using the step feed circuit, it is convenient, for example, that the table 4 can be moved even when the drive circuit is not connected to the stepping motor 3. In addition, a step feed circuit can be omitted from the drive circuit of the stepping motor 3, and in this case, the cost of the linear moving device 1 can be reduced.

Further, since the operating section 7 is configured as a large-diameter disk 5 attached to the screw shaft 33, the disk 5 can be easily operated with a fingertip even if the linear moving device 1 is downsized.
Since the diameter is large, the screw shaft 33 can be rotated with a small force.

In addition, the teeth 52 with the markings 53
And the reference line 531 attached to the support plate 23 as a guide.
By turning, the position of the table 4 can be adjusted by an angle corresponding to one step angle of the stepping motor 3. Therefore, the adjustment of the table 4 is easy.

If the pitch of the teeth 52 and the step angle of the stepping motor 3 are the same, the teeth 52 themselves can be used as an index without making the markings 53 on the disk 5.

(Embodiment 2) FIG. 2 is a perspective view showing a linear moving apparatus according to Embodiment 2 of the present invention. In addition,
Since the linear moving device 11 of the present embodiment has the same basic configuration as the linear moving device 1 described in the first embodiment, common portions are denoted by the same reference numerals, and detailed description thereof is omitted. I do.

As shown in FIG. 2, the linear moving device 11 of this embodiment also includes a table 4 and a screw shaft 3 penetrating the table 4.
3 and a stepping motor 3 for rotating the screw shaft 33
And guide shafts 61 and 62 arranged in parallel with the screw shaft 33 so as to penetrate the table 4. These constituent members are formed on the frame 2.

In this embodiment, a screw head 8 is formed on an end surface 332 of the both end surfaces of the screw shaft 33 which is located on the side of the support plate 23 as an operation unit 7 for manually rotating the screw shaft 33. There, a groove 81 for inserting a driver shaft is formed in a cross shape.

Here, the screw head 8 is provided with a marking 82 (index) at one location on the outer peripheral edge. On the other hand, a reference line 821 corresponding to the step angle of the stepping motor 3 is provided around the screw head 8 on the outer surface of the support plate 23.

According to the linear drive device 11 configured as described above, if the driver is turned while inserting the tip of the driver shaft into the groove 81, the screw shaft 33 is rotated.
Can be fine-tuned. Therefore, since the position of the table 4 can be finely adjusted without using the step feed circuit, the table 4 can be moved even when the drive circuit is not connected to the stepping motor 3, which is convenient. In addition, a step feed circuit can be omitted from the drive circuit of the stepping motor 3, and in this case, the cost of the linear moving device 1 can be reduced. Also,
Since the screw shaft 33 is rotated by the driver, the screw shaft 33 can be rotated with a correspondingly small force.

Further, by turning the screw shaft 33 with the screw head 8 provided with the marking 82 and the reference line 821 attached to the support plate 23 as a guide, the table 4 is rotated by an angle corresponding to one step angle of the stepping motor 3. Position can be adjusted.
Therefore, the adjustment of the table 4 is easy.

Moreover, in this embodiment, even if the linear drive device 11 is incorporated inside the device so that the fingertip cannot be reached, even the tip of the screwdriver shaft 33 has the end surface 33 of the screw shaft 33.
There is an advantage that the screw shaft 33 can be rotated if it reaches the groove 81 formed in FIG.

The groove 81 does not have to be the end surface 332 of the screw shaft 33 protruding toward the support plate 23, but the screw shaft 33 located on the rear end surface 34 of the stepping motor 3.
May be formed on the end face.

The groove 81 may be configured so that a minus screwdriver can be inserted without using a plus screwdriver.

Further, a general-purpose male screw conforming to JIS having the screw head 8 as the screw shaft 33 itself may be used. In this case, the hole 42 (the screw shaft 33) formed in the table 4
Can be constituted by an ordinary nut that fits with it. With this configuration, unlike the case where a simple rod is machined to manufacture the screw shaft 33 having the screw head 8 or the case where a screw hole is formed in the table 4, the labor for machining can be omitted. Manufacturing costs can be reduced.

[0033]

As described above, the linear moving device according to the present invention is characterized in that it has an operating section for manually rotating the screw shaft when finely adjusting the position of the table.
Therefore, according to the present invention, the table position on the screw shaft can be finely adjusted manually without using the step feed circuit, which is convenient.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a linear moving device according to Embodiment 1 of the present invention.

FIG. 2 is a perspective view showing a linear moving device according to Embodiment 2 of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 11 Linear movement apparatus 2 Frame 3 Stepping motor 33 Screw axis 4 Table 5 Disk 53, 82 Marking (index) 61, 62 Guide axis 7 Operation part 81 Slot for driver axis insertion

Claims (5)

[Claims] 1. A linear moving device comprising: a screw shaft; a table having an engaging portion that engages with the screw shaft; and a stepping motor that rotates the screw shaft to linearly move the table on the screw shaft. The linear moving device according to claim 1, wherein an operation unit for manually rotating the screw shaft is connected to the screw shaft. 2. The linear moving device according to claim 1, wherein the operation unit is a large-diameter disk attached to the screw shaft. 3. The linear movement device according to claim 1, wherein the operation portion is a groove for inserting a driver shaft formed in at least one of both end surfaces of the screw shaft. 4. The method according to claim 2, wherein an index for adjusting an angular position of the operation unit to an angular position corresponding to a step angle of the stepping motor is formed for the operation unit. Characteristic linear moving device. 5. The method according to claim 1, wherein
It has a pair of support plates that rotatably support both ends of the screw shaft, and a guide shaft that supports the table disposed between the support plates is fixed to the support plate, and one of the support shafts is supported. A linear moving device, wherein the stepping motor is attached to a plate.