JP2896016B2 - Traverse device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traverse device for moving a moving body at a predetermined stroke by rotating a peripheral cam.

[0002]

2. Description of the Related Art In a conventional traverse device of this type, a peripheral cam is rotatably supported by a frame, and a moving body is supported by the frame so as to be movable in the rotation axis direction of the peripheral cam. . The movable body is provided with a cam follower that engages with the cam groove of the peripheral cam, and when the peripheral cam is rotated, the movable body is moved through the engagement between the cam groove and the cam follower. Was.

[0003]

However, since the conventional traverse device has a simple cam mechanism including a peripheral cam having a cam groove and a cam follower, the traverse device is limited to the cam stroke of the cam groove. Thus, there is a problem that the moving stroke of the moving body cannot be made large.

Further, it is conceivable to set the cam stroke of the cam groove to be large to increase the moving stroke of the moving body. However, in such a configuration, the peripheral cam becomes large in diameter and the device becomes large. A new problem of large size has arisen.

[0005] The present invention has been made in view of the problems existing in the prior art, and its object is to limit the cam stroke of the cam groove of the peripheral cam. Another object of the present invention is to provide a traverse device that can move a moving body with a large moving stroke and can prevent the peripheral cam from increasing in diameter and preventing the device from increasing in size.

[0006]

In order to achieve the above object, an invention according to claim 1 is provided with a rotating shaft rotatably supported by a frame, a rotating shaft integrally rotatable with the rotating shaft, and an axial direction. A peripheral cam having a peripheral surface provided with a cam groove, and a driving cam follower fixed to the frame so as to be engaged with a cam groove of the peripheral surface cam;
A moving body supported on the frame so as to be movable in the axial direction of the rotating shaft, so as to engage with the cam groove of the peripheral cam,
A driven cam follower fixed to a moving body, wherein the driving cam follower and the driven cam follower are provided at different positions in the circumferential direction of the peripheral cam, and the driving cam follower is adjusted in the axial direction of the rotation shaft. It is provided as possible.

According to a second aspect of the present invention, in addition to the first aspect, the driven cam follower is provided so as to be adjustable in the axial direction of a rotating shaft, and a plurality of the cam grooves are provided.
Furthermore, a pair of the driving cam follower and the driven cam follower are provided.

[0008] The invention according to claim 3 is the invention according to claim 1 or 2.
In addition to the above-mentioned invention, a cam groove in which the driving cam follower is engaged and a cam groove in which the driven cam follower is engaged are shared.

[0009]

According to the traverse device constructed as described above, according to the first aspect of the present invention, when the rotating shaft is rotated, the peripheral cam is rotated integrally with the cam groove and the driving cam follower. Through the engagement, it is moved in the axial direction by the same stroke as the cam stroke of the cam groove. Accordingly, the moving body is moved with a movement stroke twice as long as the cam stroke of the cam groove via the engagement between the cam groove and the driven cam follower.

Therefore, the moving body is not limited to the cam stroke of the cam groove of the peripheral cam, and the moving body can be moved to the cam stroke of two cam strokes.
It can be moved with twice as large a movement stroke.
In addition, since the moving stroke of the moving body can be increased without setting the cam stroke of the cam groove to be large, it is possible to prevent the peripheral cam from increasing in diameter and increasing the size of the apparatus.

Further, by adjusting the position of the driving cam follower in the axial direction of the rotating shaft while the rotation of the rotating shaft is stopped, the position of the moving body in the axial direction of the rotating shaft together with the peripheral cam is adjusted. be able to. Therefore, when assembling the device with an external device, the position of the moving stroke of the moving body can be adjusted in accordance with the settings of the external device.

According to the second aspect of the present invention, in a portion where the driving cam follower and the driven cam follower are respectively engaged with the cam grooves, the position of the cam follower is adjusted so that the two cam followers are paired with the two cam followers. It becomes possible to clamp between the grooves. As a result, the rotation of the peripheral cam and the movement of the moving body can be smoothly performed without rattling.

According to the third aspect of the present invention, the driving cam follower and the driven cam follower are engaged with the same cam groove. Therefore, the number of cam grooves formed on the peripheral cam is smaller than when each is engaged with a separate cam groove,
Manufacturing becomes easy.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of a traverse device embodying the present invention will be described in detail with reference to FIGS.

As shown in FIGS. 1 and 2, the frame 1 is formed in a box shape, and an opening 2 is provided on the upper surface thereof. A spline shaft 3 as a rotation shaft is rotatably supported in the frame 1 via a bearing 4 and is driven to rotate by a motor (not shown). The peripheral cam 5 is supported by the spline shaft 3 via a pair of spline nuts 6 so as to be integrally rotatable and relatively movable in the axial direction, and a part of the outer peripheral upper surface is projected upward from the opening 2 of the frame 1. ing.
The pair of endless cam grooves 7 are formed in parallel with the outer peripheral surface of the peripheral cam 5, and as shown in FIGS. 3 and 4, are symmetrical about a position at a rotation angle of 180 degrees with a predetermined cam stroke S1. It is formed in a shape.

A pair of driving cam followers 8 are mounted on the inner bottom of the frame 1 via a mounting plate 9 so as to be adjustable in position, and are positioned and fixed at predetermined positions by positioning bolts 10. When the driving cam follower 8 is engaged with the cam groove 7 of the peripheral cam 5 from below and the peripheral cam 5 is rotated with the rotation of the spline shaft 3, the driving cam follower 8 and the cam groove 7 Through the engagement, a moving force in the axial direction is induced on the peripheral cam 5.

A flat moving body 11 is supported on the upper surface of the frame 1 via a pair of rails 12 so as to be movable in the axial direction of the spline shaft 3. A pair of driven cam followers 13 are provided on the lower surface of the movable body 11 so as to be adjustable in position, and are positioned and fixed at predetermined positions by positioning screws 14. The driven cam follower 13 is engaged with the cam groove 7 of the peripheral cam 5 from above. Therefore,
The driving cam follower 8 and the driven cam follower 13 are provided at positions facing each other with the peripheral cam 5 interposed therebetween. When the peripheral cam 5 is moved while being rotated with the rotation of the spline shaft 3, a moving force in the axial direction is induced in the moving body 11 through the engagement between the driven cam follower 13 and the cam groove 7. You.

Next, the operation of the traverse device configured as described above will be described. Now, in this traverse device, the spline shaft 3 is driven by a motor (not shown) or the like.
Is rotated, the peripheral cam 5 is integrally rotated via the spline nut 6. At this time, since the fixed driving cam follower 8 is engaged with the cam groove 7 of the peripheral cam 5, a moving force in the axial direction of the spline shaft 3 is induced on the peripheral cam 5. The peripheral cam 5 is moved by the same stroke as the cam stroke S1 of the cam groove 7, as shown by the solid line and the chain line in FIG.

As described above, with the rotation of the spline shaft 3,
When the peripheral cam 5 is moved while being rotated, the moving body 11 is moved through the engagement between the cam groove 7 and the driven cam follower 13.
, A moving force in the axial direction of the spline shaft 3 is induced.
As shown by a solid line and a chain line in FIG. 1, the moving body 11 is moved twice as much as the cam stroke S1 of the cam groove 7 without being restricted by the driving cam follower 8.
It is moved by.

Therefore, the moving body 11 can be moved with a moving stroke S2 twice as large as the cam stroke S1, without being limited to the cam stroke S1 of the cam groove 7 of the peripheral cam 5. Therefore, the moving stroke S2 of the moving body 11 can be doubled without setting the cam stroke S1 of the cam groove 7 large, so that the peripheral cam 5 has a large diameter and the apparatus becomes large. Can be prevented.

Further, since the driven cam followers 13 are also engaged with the cam grooves 7 with which the driving cam followers 8 are engaged, the number of cam grooves is smaller than in the case where each of them is engaged with a separate cam groove. As a result, the production is easy and the production cost can be reduced.

[0022]

Next, another embodiment of the traverse device of the present invention will be described.
An embodiment will be described with reference to FIGS.

In the second embodiment, two pairs of endless cam grooves 15 and 1 forming a pair on the outer peripheral surface of the peripheral cam 5 are provided.
6 are formed. The pair of outer cam grooves 15 are formed asymmetrically so that the cam gradient in the front half is smaller than the cam gradient in the rear half, and the driving cam follower 8 is engaged with the cam grooves 15. Also, a pair of inner cam grooves 16 are provided.
Contrary to the outer cam groove 15, the front half cam gradient is formed asymmetrically so as to be larger than the rear cam cam gradient, and the cam groove 16 is engaged with the driven cam follower 13.

In the traverse device of this embodiment,
When the peripheral cam 5 is rotated with the rotation of the spline shaft 3, the peripheral cam 5 is brought into contact with the cam stroke S1 of the cam grooves 15, 16 through the engagement between the outer cam groove 15 and the driving cam follower 8. It is moved in the axial direction by the same stroke. As a result, the moving body 11 is moved with a movement stroke S2 twice as large as the cam stroke S1 of the cam grooves 15, 16 through the engagement between the inner cam groove 16 and the driven cam follower 13. At this time, the cam gradient in the front half of the outer cam groove 15 is formed to be smaller than the cam gradient in the rear half. Then, in the first half of the rotation angle of the peripheral cam 5, the peripheral cam 5 and the moving body 11 move at a low speed, and in the second half of the rotation angle, the peripheral cam 5 and the moving body 11 move at a high speed.

Therefore, also in the second embodiment, the movement of the moving body 11 is not restricted by the driving cam follower 8, as in the case of the first embodiment. Further, the moving body 11 is not limited to the cam stroke S1 of the cam grooves 15, 16 of the peripheral cam 5,
It can be moved by twice the moving stroke S2. Therefore, the moving stroke S2 of the moving body 11 can be doubled without setting the cam stroke S1 of the cam grooves 15, 16 large, so that the peripheral cam 5 has a large diameter and the apparatus becomes large. Can be prevented.

The present invention is not limited to the configuration of the above-described embodiment. For example, the peripheral cam 5 is formed in a cylindrical shape, and the cam grooves 7, 15,. 16
And so on, without departing from the spirit of the invention.
It is also possible to arbitrarily change the configuration of each unit and to embody it.

[0027]

As described above, according to the first aspect of the present invention, the movement is not limited by the driving cam follower, and the invention is not limited to the cam stroke of the cam groove of the peripheral cam. The moving body can be moved with a large moving stroke. Therefore, it is possible to prevent the peripheral cam from becoming large in diameter and the device from being enlarged.

Further, when assembling the device with an external device,
The position of the moving stroke of the moving body can be adjusted according to the setting of the external device. According to a second aspect of the present invention, in addition to the effect of the first aspect of the present invention, the position of the cam follower is adjusted at a portion where the driving cam follower and the driven cam follower are respectively engaged with the cam grooves. Since the pair of cam followers can sandwich the two cam grooves, the rotation of the peripheral cam and the movement of the moving body can be smoothly performed without rattling.

The invention described in claim 3 is the invention according to claim 1 or 2
In addition to the effects of the invention described in (1), the production is easy and the production cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a traverse device embodying the present invention.

FIG. 2 is a side view of the traverse device.

FIG. 3 is an expanded view showing the shape of the peripheral cam in an enlarged manner.

FIG. 4 is a timing chart showing the relationship between the rotation angle of the peripheral cam and the cam stroke.

FIG. 5 is a sectional view showing a second embodiment of the traverse device of the present invention.

FIG. 6 is an expanded view showing the shape of the peripheral cam in an enlarged manner.

FIG. 7 is a timing chart showing the relationship between the rotation angle of the peripheral cam and the cam stroke.

[Explanation of symbols]

1 ... frame, 3 ... spline shaft as rotation axis, 5 ...
Peripheral cam, 6: spline nut, 7: cam groove, 8: driving cam follower, 11: moving body, 13: driven cam follower, 15: outer cam groove, 16: inner cam groove, S
1: cam stroke, S2: moving stroke

Claims (3)

(57) [Claims] A rotary shaft rotatably supported by a frame, a peripheral cam rotatably supported by the rotary shaft and relatively movable in an axial direction, and provided with a cam groove on a peripheral surface thereof; A driving cam follower fixed to the frame so as to be engaged with a cam groove of the peripheral cam; a moving body supported on the frame so as to be movable in an axial direction of a rotating shaft; and a cam groove of the peripheral cam. to engage, and a cam follower follower fixed to the moving body, and said driving cam follower and the driven cam follower, provided on different positions in the circumferential direction of the circumferential face cam Rutotomoni, drive
Cam follower is installed so that its position can be adjusted in the axial direction of the rotating shaft.
Traverse and wherein the digit. 2. The driven cam follower is connected to an axis of a rotating shaft.
Direction, and a plurality of cam grooves are provided.
The driving cam follower and the driven cam follower
The traverse device according to claim 1, wherein a pair of the traverse devices is provided. 3. The traverse device according to claim 1, wherein a cam groove engaged with the driving cam follower and a cam groove engaged with the driven cam follower are shared.