JP3481711B2 - Electric linear reciprocating device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric linear reciprocating device in which a moving member such as a slide table for supporting a work is reciprocated in a linear direction.

[0002]

2. Description of the Related Art A moving member such as a slide table is linearly reciprocated in order to convey a work from one position to another position or to move a hand or a tool for holding the work between a processing position and a retracted position. Sometimes. This linear reciprocating device is also called a slide unit or slider, and there is a type in which a moving member is driven via a timing belt driven by an electric motor.

[0003]

Since such a linear reciprocating device is incorporated into various manufacturing devices in a factory, the thinner the housing constituting the main body of the device, the wider the range of use thereof. It will be possible.

However, in the conventional electric linear reciprocating device using the timing belt, the thinness of the device is limited. Therefore, in order to achieve a thinner device,
The present inventor has conducted various studies. As a result, the reason why the device cannot be made thin is that a guide rail is provided in the housing in order to slidably guide a moving member such as a slide table or a slide block on which a work is placed with a small friction resistance. The moving member is slid on the guide rail, and the timing belt for driving the moving member is arranged above the guide rail, so that the guide rail and the timing belt move vertically. It was recognized that they would be stacked in the direction. Therefore, various arrangements of the timing belt and the guide rails have been studied in order to achieve a thinner device.

An object of the present invention is to reduce the thickness of an electric linear reciprocating device using an electric motor.

The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

[0007]

Among the inventions disclosed in the present application, a brief description will be given to the outline of typical ones.
It is as follows.

That is, in the electric linear reciprocating device of the present invention, the guide rail along the longitudinal direction is provided on the inner surface in the widthwise central portion.
A housing having a substantially rectangular bottom plate with four driven pulleys rotatably provided at both corners in the width direction of both ends, and a flat surface on one side and tooth parts on the other side. is a timing belt passed over the driven pulley and the flat surface in contact with the driven side pulley so as to surround the guide rail, the moth
Is guided slidably disposed longitudinally Idoreru, a slide block in which the timing belt is connected, rotatably provided at one end of said bottom plate, said bottom
Between the two driven pulleys provided at one end of the plate
A drive-side pulley having external teeth that mesh with the tooth portions of the timing belt at a portion protruding toward the center of the bottom plate, and an electric motor that is attached to the bottom plate and drives the drive-side pulley. It is characterized by Also, each of the driven pulley and drive pulley
Adjustable movement of at least one of the leads in the longitudinal direction of the bottom plate
Characterized by being free .

[0009]

In the electric linear reciprocating device having the above structure,
The timing belt connected to the slide block is provided so as to surround a guide rail for slidably guiding the slide block, and the timing belt and the guide rail overlap in the thickness direction of the timing belt. As a result, the housing and the entire device can be made thinner.

[0010]

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

FIG. 1 is a perspective view showing the external appearance of an electric linear reciprocating device according to an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1 with a cover removed, and FIG. is a cross-sectional view taken along the line III-III in 2, 4 2
4 is a sectional view taken along line IV-IV in FIG.

The electric linear reciprocating device shown in the drawing has a substantially rectangular metal housing 10 which, as shown in FIGS. 3 and 4, has a bottom plate 10.
It is composed of a and side plates 10b and 10c, and has a cup-shaped cross section. Caps 11 and 12 made of resin are fixed to both ends of the housing 10.

A guide rail 13 is provided on the bottom plate 10a of the housing 10 along the longitudinal direction at the center in the width direction thereof, as shown in FIGS. 2 and 3, and slides on the guide rail 13. A slide block 15 is fixed to a guide block 14 that is movably provided.
Therefore, the slide block 15 is the guide block 1
4 and the guide rail 13 reciprocate in a linear direction.

A cover 16 is attached to the housing 10 to cover the widthwise central portion of the housing 10, and predetermined gaps 17 and 18 are formed between the cover 16 and the side plates 10b and 10c of the housing 10. There is. The slide block 15 has supporting portions 15a and 15b that protrude upward through the gaps 17 and 18, and directly support the work in this portion, or via a supporting table 19 fixed to the supporting portions 15a and 15b. The work is supported, and the work is conveyed by the slide block 15.

As shown in FIG. 2, a total of four driven pulleys 21 to 24 are rotatably provided in the housing 10 at two corners at both ends thereof, and these driven pulleys 21 to 24 are rotatable. The outer peripheral surfaces of 21 to 24 are flat. These driven pulleys 21 to 24 have
And a timing belt 25 is passed over, the timing belt 25 becomes endless clogging endless or loop-like, one side is a flat surface, on the other side are formed teeth 25a. Then, as shown in FIG. 2, the timing belt 25 is hung on the driven pulleys 21 to 24 with the side on which the tooth portion 25a is formed as the outside. The tooth portion 25a of the timing belt 25 is shown in FIG.
A part of the tooth portion 25a is shown, and the tooth portion 25a of the other portion is omitted for convenience of drawing.

In order to drive the timing belt 25,
As shown in FIG. 4, a motor 26 is attached to the bottom plate 10 a of the housing 10, and a drive side pulley 28 is fixed to a shaft 27 of the motor 26. The drive-side pulley 28 is located in the central portion of the housing 10 in the width direction, and is larger than the two driven-side pulleys 21 and 22 provided at one end of the housing 10.
Are displaced to the central portion side in the longitudinal direction.

The driving pulley 28 has external teeth 28a,
A drive side pulley 28 is hung on the timing belt 25 at a portion protruding from the space between the two driven side pulleys 21 and 22 toward the center side, and the tooth portion 28 a of the drive side pulley 28 is attached to the timing belt 25. It is adapted to mesh with the tooth portion 25a provided on the.

The timing belt 25 is fastened to the slide block 15 at a connecting portion 31 provided on the slide block 15 by using a screw member (not shown).
Is driven to drive the timing belt 25, the drive of the timing belt 25 is transmitted to the slide block 15 at the connecting portion 31. Although the connecting portion 31 is provided on one support portion 15b side of the slide block 15, it may be provided on the other support portion 15a side. In the illustrated case, a gap 32 is formed between the other supporting portion 15 a side and the timing belt 25.

As shown, a rectangular housing 10
Since the driven pulleys 21 to 24 are provided at the corners of both ends of the housing, and the timing belt 25 is hung over these, the timing belt 25 is
It is arranged so as to move along the 0 side plates 10b and 10c. On the other hand, since the guide rail 13 for guiding the slide block 15 is provided in the central portion in the width direction of the housing 10 along the longitudinal direction, the timing belt 25 surrounds the guide rail 13, that is, the timing belt 25. The guide rail 13 and the guide rail 13 are arranged in the left-right direction in FIG. 3 and FIG.
Are arranged so as to overlap each other in the thickness direction. As a result, the vertical dimension of the housing 10 in the drawing can be reduced, and the device can be made thinner.

The timing belt 25 is formed in an endless manner by fixing both end surfaces of the belt-shaped timing belt 25 having a predetermined length to the slide block 15 with the connecting portion 31 in a state of facing each other at their abutting portions. Alternatively, the timing belt 25 formed in advance in an endless shape may be used. In order to apply a predetermined tension to the timing belt 25, at least one of the four driven pulleys 21 to 24 in total can be adjusted and moved in the longitudinal direction of the housing 10, and the drive pulley 28 can be adjusted and moved in the same direction. You may make it free.

As shown in FIGS. 3 and 4, the slide block 15 is provided with a positioning step portion 33, and the side surface of the timing belt 25 is brought into contact with the positioning step portion 33 so that the timing is changed. When the belt 25 is fastened to the slide block 15, its positioning becomes easy. All the pulleys 21 to 24, 28 are arranged so as to match the position of the positioned timing belt 25.
Is provided.

Next, the procedure of carrying the work by using the electric linear reciprocating device will be described. When the slide block 15 is located at one end in the left-right direction in FIGS. The work is mounted on. When the motor 26 is driven in this state, the timing belt 25 is driven and the slide block 15 is driven in the linear direction. As a result, the work is conveyed to a predetermined position at the other end in the left-right direction.

In the illustrated case, the drive pulley 28 is provided at the central portion in the width direction of the housing 10, but the drive pulley 28 may be provided by displacing it to one side in the width direction. This makes it possible to effectively use the space on the lower surface of the housing 10 on the side where the motor 26 is not provided.

Although the invention made by the present inventor has been specifically described based on the embodiments, the invention is not limited to the embodiments and various modifications can be made without departing from the scope of the invention. Needless to say.

For example, the driving pulley 28 may be provided at either the left or right end of the both ends of the housing 10 in FIG. Also, in the case of illustration,
Although the device is installed horizontally, it may be installed vertically or in an inclined direction.

[0026]

The effects obtained by the typical ones of the inventions disclosed in the present application will be briefly described as follows.
It is as follows.

(1). A guide rail for slidably guiding a slide block for transporting a work is provided in the central portion in the width direction of the housing, and a timing belt 25 for driving the guide block surrounds the guide rail. Since it is provided in such a manner that the timing belt and the guide rail can overlap in the thickness direction of the timing belt, a thin electric linear reciprocating device can be obtained.

(2) As a result, the range of use of the device can be expanded and the device can be installed in a narrow place.

[Brief description of drawings]

FIG. 1 is a perspective view showing an external appearance of an electric linear reciprocating device that is an embodiment of the present invention.

FIG. 2 is a plan view of FIG. 1 with a cover removed.

3 is a sectional view taken along line III-III in FIG.

4 is a sectional view taken along line IV-IV in FIG.

[Explanation of symbols]

10 housing 11,12 cap 13 Guide rail 14 Guide block 15 slide blocks 16 covers 17,18 gap 19 Support table 21-24 Driven pulley 25 timing belt 26 motor 27 shaft 28 Drive side pulley 31 Connection 32 gap 33 steps

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-63-47558 (JP, A) JP-A-8-25255 (JP, A) JP-A-2-286589 (JP, A) JP-A-61- 140665 (JP, A) Actual development 4-13279 (JP, U) Actual development 1-110022 (JP, U) Actual development 60-97329 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F16H 19/00-19/08 F16H ⁷ /00-7/24 B25J 5/02-5/04 B23Q 5/38

Claims (2)

(57) [Claims] 1. A substantially rectangular bottom in which a guide rail extending in the longitudinal direction is fixed to the inner surface at the center in the width direction , and four rotatable pulleys are provided at both corners in the width direction at both ends.
A housing having a plate, and a timing belt hung on the driven pulley such that one side is a flat surface and teeth are provided on the other side, the flat surface is in contact with the driven pulley and surrounds the guide rail. A slide block which is guided by the guide rail and is slidable in the longitudinal direction and to which the timing belt is connected; and a slide block which is rotatably provided at one end of the bottom plate.
From the front between the two driven pulleys provided at one end
A drive-side pulley having external teeth that mesh with the tooth portions of the timing belt in a portion protruding toward the center of the bottom plate, and an electric motor that is attached to the bottom plate and drives the drive-side pulley. An electric linear reciprocating device characterized by. 2. The electric linear reciprocating device according to claim 1.
In addition, each of the driven side pulley and the drive side pulley
At least one of them is adjusted and moved in the longitudinal direction of the bottom plate.
An electric linear reciprocating device characterized by being present .