JP3724529B2 - Synchronous mobile device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synchronous movement device used for an automatic assembly machine or the like. The synchronous moving device of the present invention is a device that mounts, for example, a tool on a moving part that is a component thereof, and performs work such as workpiece escapement, handling, or centering.
[0002]
[Prior art]
Conventionally, a synchronous mobile device published in No. 2521802 utility model registration gazette is known.
[0003]
As shown in FIG. 7, the synchronous movement device described in this publication includes one moving unit 52 of a pair of moving units 52 and 53 arranged to slide in parallel with respect to the fixed unit 51. While the fluid pressure is slid in one direction, the other moving portion 53 is driven in the opposite direction by a synchronizing mechanism 54 having a cam 55. In this synchronous moving device, the flat cam 55 A rotation shaft 55 a is erected at the center, and the rotation shaft 55 a is inserted into a hole 51 b provided in the top plate 51 a of the fixing portion 51, so that the cam 55 is rotatable with respect to the fixing portion 51. It is supported.
[0004]
Therefore, according to this synchronous movement device, since the rotation shaft 55a is erected on the cam 55 and a corresponding height is required, the entire device takes up a large space in the height direction. .
[0005]
On the other hand, in handling with a robot arm or the like, the shorter the distance from the robot head to the workpiece gripping point, the higher the accuracy and the smaller the moment load applied to the robot. Furthermore, the vibration of the head is reduced and the tact time can be shortened. Therefore, if the synchronous moving device for handling etc. is small in the height direction, not only can the automatic assembly machine itself be miniaturized, but also the accuracy of the automatic assembly machine can be improved, and the tact time can be shortened. As a result, productivity can be improved. Therefore, it is desired to reduce the size of the synchronous moving apparatus in the height direction.
[0006]
[Problems to be solved by the invention]
In view of the above, the present invention can smoothly rotate the cam even if the rotation shaft is omitted from the cam, and the synchronization shaft reduced in the height direction by the amount that the rotation shaft is omitted. An object is to provide a mobile device.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the synchronous movement device according to the present invention is configured so that one moving part of a pair of moving parts arranged so as to slide in parallel with respect to the fixed part is unidirectionally supplied with fluid pressure. A synchronous moving device that slides and moves the other moving portion in the opposite direction by a synchronizing mechanism having a cam that does not have a rotating shaft, and is provided with a cam accommodating portion that rotatably accommodates the cam in the fixed portion. The cam is rotatably supported by the fixed portion by sliding the flat surface and outer peripheral surface of the cam against the inner wall of the cam housing portion.
[0008]
As in the synchronous movement device of the present invention having the above-described configuration, the fixed portion is provided with a cam accommodating portion that rotatably accommodates the cam, and the cam slides its flat surface and outer peripheral surface against the inner wall of the cam accommodating portion. Therefore, when the fixed portion is rotatably supported, the cam is guided to the inner wall of the cam housing portion even if the rotating shaft is not erected on the cam and the cam is not pivotally supported by the rotating shaft. And rotate smoothly.
[0009]
The cam that rotates in the cam housing portion is preferably disk-shaped, but a part of the outer peripheral edge of the disk may be cut out so that it can no longer be called a disk. The cam may be guided to the inner peripheral wall of the cam housing portion without being unnecessarily large in the radial direction and smoothly rotate within the actual operation rotation angle. In order to make this possible, it is preferable to leave a part of the circle at least at a part of the outer peripheral edge of the cam at a 180-degree symmetrical position.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0011]
1 shows a plan view of the synchronous movement apparatus according to the embodiment, FIG. 2 is a front view of the apparatus, FIG. 3 is a bottom view, FIG. 4 is a cross-sectional view taken along line AA in FIG. It is the BB sectional view taken on the line in FIG. FIG. 6 is a perspective view of a single cam.
[0012]
The synchronous movement apparatus according to the embodiment first includes a fixed portion 1 in which side plates 3 and 4 are fixed to both ends in the longitudinal direction of the fixed portion main body 2, and a pair of moving portions 5 is provided on an upper surface 1 a of the fixed portion 1. , 6 are arranged to slide parallel to each other.
[0013]
The moving parts 5 and 6 are linearly slid along the longitudinal direction of the fixed part 1 by the linear guide mechanisms 7 and 8, respectively. The linear guide mechanisms 7 and 8 are respectively arranged on the upper surface 1a of the fixed part 1 in the longitudinal direction. A groove 1b provided along the projection, a convex portion (also referred to as a guide rail portion) 1c provided along the longitudinal direction of each side wall of the groove 1b, and a slidable engagement with the convex 1c. Are provided with recesses 5a and 6a provided in the moving parts 5 and 6, respectively. The convex portion 1c and the concave portions 5a and 6a have a substantially triangular cross section so as to correspond to each other. The groove portion 1 b and the convex portion 1 c are provided over the entire length of the fixed portion main body 2, and the concave portions 5 a and 6 a are provided over the entire length of the moving portions 5 and 6.
[0014]
A pair of pistons 9, 10 are fixed to one side plate 3 toward the other side plate 4, and one piston 9 is slidably inserted into a cylinder chamber 5 b provided in one moving portion 5. The other piston 10 is slidably inserted into a cylinder chamber 6b provided in the other moving part 6.
[0015]
One end of each of the pistons 9 and 10 is inserted into holes 3 a and 3 b provided in one side plate 3, and piping ports 11 and 12 are provided at the one end. Further, through holes 9a and 10a are provided in the pistons 9 and 10 so that compressed air as an operating pressure can be supplied from the piping ports 11 and 12 to the cylinder chambers 5b and 6b. Piston seals 13 and 14 are provided on the outer circumferences of the pistons 9 and 10 so that the supplied compressed air does not leak to the outside.
[0016]
As shown in FIG. 4, a cam housing space 1 d is provided in the fixed portion 1, and a cam 16 that is a component part of the synchronization mechanism 15 is rotatably housed in the cam housing space 1 d.
[0017]
As shown in FIG. 6, the cam 16 has a disk shape and does not have a rotating shaft as in the above-described prior art, so that the disk-shaped cam 16 can be rotatably accommodated. The cam housing space 1d is also provided as a disk-shaped space. As shown in FIG. 3, the cam housing space 1d is opened on the lower surface 1e of the fixed portion 1, and an annular mounting groove 1f is provided on the periphery of the opening so that the cam 16 does not fall out from the lower surface opening. Here, a retaining ring 17 for a hole is fitted. The cam housing space 1d communicates with the groove 1b within the range of the circular plane.
[0018]
With the above configuration, the cam 16 is rotatably supported by the fixed portion 1 by sliding the flat surface 16a and the outer peripheral surface 16b against the inner wall of the cam housing portion 1d. In this case, the inner wall of the cam housing portion 1d is Specifically, the inner circumferential wall 1g of the cam housing portion 1d, the lower surface 1i of the beam portion 1h between the pair of groove portions 1b, and the upper surface 17a of the retaining ring 17 are referred to.
[0019]
Pin-shaped engaging portions (also referred to as protrusions) 18 and 19 are provided on the lower surfaces of the moving portions 5 and 6 and protrude into the cam housing portion 1d. The engaging portions 18 and 19 are respectively connected to the cam 16. It engages with a pair of long hole-like engaging portions (also referred to as cam grooves) 16c, 16d. Therefore, for example, in FIG. 1, when the moving part 5 on the upper and lower sides in the figure moves in the right direction, the cam 16 rotates counterclockwise and the upper moving part 6 is driven in the left direction. When the camera moves in the right direction, the cam 16 rotates clockwise and the lower moving unit 5 follows in the left direction. Although the illustrated engaging portions 16c and 16d are in the shape of a long hole, they may be in the shape of a recess, groove or notch instead.
[0020]
Next, the operation of the synchronous movement apparatus having the above configuration will be described.
[0021]
Each of the drawings shows a state in which compressed air is not supplied to the apparatus, and the moving units 5 and 6 are respectively located at the center of the stroke.
[0022]
First, from this state, when the compressed air supplied from one piping port 11 is filled into one cylinder chamber 5b through the through hole 9a, one moving portion 5 is pressed by the compressed air, and the linear guide mechanism 7 It moves while being guided to the side plate 4 and stops. At this time, the pin-like engaging portions 18 and 19 projecting from the moving portions 5 and 6 are engaged with the long-hole-like engaging portions 16c and 16d provided in the cam 16, so that the cam In response to this, the other moving part 6 moves while being guided by the linear guide mechanism 8 in the opposite direction, and at the same time the one moving part 5 stops.
[0023]
Next, when the compressed air filled in one cylinder chamber 5b is discharged and the compressed air supplied from the other piping port 12 is filled into the other cylinder chamber 6b through the through hole 10a, the other moving part is obtained. 6 is pressed by the compressed air, moves while being guided by the linear guide mechanism 8, contacts the side plate 4 and stops. At this time, the pin-like engaging portions 18 and 19 projecting from the respective moving portions 5 and 6 are engaged with the long-hole engaging portions 16c and 16d provided in the cam 16, As the cam 16 is driven to rotate, one moving part 5 moves while being guided by the linear guide mechanism 7 in the opposite direction, and stops at the same time as the other moving part 6 stops.
[0024]
Therefore, by alternately repeating supply and discharge of compressed air in this manner, the pair of moving parts 5 and 6 reciprocate in opposite directions, that is, move synchronously in opposite directions.
[0025]
In the synchronous movement apparatus having the above-described configuration, the fixed portion 1 is provided with a disc-shaped cam accommodating portion 1d that rotatably accommodates the disc-shaped cam 16, and the cam 16 has a flat surface 16a and an outer peripheral surface 16b. Since the cam 16 is slidably contacted with the inner wall of the cam housing portion 1d, it is rotatably supported by the fixed portion 1, so that the cam 16 can be connected to the cam housing portion 1d even if there is no rotating shaft as in the prior art. The device is smoothly rotated in both forward and reverse directions, and the height of the device is lower than that of the prior art because the rotation shaft is omitted. Therefore, not only can the apparatus be downsized in the height direction, but also the accuracy of the automatic assembly machine can be improved, and productivity can be improved by shortening the tact time.
[0026]
Moreover, since the comparatively large top plate which was the component in the said prior art was abbreviate | omitted, the weight of the whole apparatus can be reduced.
[0027]
【The invention's effect】
The present invention has the following effects.
[0028]
That is, in the synchronous moving device of the present invention having the above-described configuration, the cam housing portion that rotatably accommodates the cam is provided in the fixed portion, and the cam slides the plane and outer peripheral surface of the cam against the inner wall of the cam housing portion. Therefore, even if there is no rotation shaft as in the prior art, the cam smoothly rotates in both the forward and reverse directions within the cam housing portion, and the rotation shaft is Omitted, the height of the device is lower than before. Therefore, not only can the apparatus be downsized in the height direction, but also the accuracy of the automatic assembly machine can be improved, and productivity can be improved by shortening the tact time.
[Brief description of the drawings]
FIG. 1 is a plan view of a synchronous movement device according to an embodiment of the present invention. FIG. 2 is a front view thereof. FIG. 3 is a bottom view. FIG. 6 is a perspective view of a single cam unit. FIG. 7 is an exploded perspective view of a conventional synchronous movement device.
DESCRIPTION OF SYMBOLS 1 Fixed part 1a, 17a Upper surface 1b Groove part 1c Projection part 1d Cam accommodating part 1e, 1i Lower surface 1f Mounting groove 1g Inner peripheral wall 1h Beam part 2 Fixed part main body 3, 4 Side plate 3a, 3b Hole part 5, 6 Moving part 5a, 6a Recess 5b, 6b Cylinder chamber 7, 8 Linear guide mechanism 9, 10 Piston 9a, 10a Through hole 11, 12 Piping port 13, 14 Piston seal 15 Synchronizing mechanism 16 Cam 16a Flat surface 16b Outer peripheral surface 16c, 16d, 18, 19 Engagement Part 17 Retaining ring for hole

Claims (1)

While moving one moving part (5) of a pair of moving parts (5) and (6) arranged so as to slide in parallel with respect to the fixed part (1) in one direction by supplying fluid pressure, A synchronous movement device that drives the other moving part (6) in the opposite direction by a synchronous mechanism (15) having a cam (16) that does not have a rotating shaft ,
A cam accommodating portion (1d) for rotatably accommodating the cam (16) is provided in the fixed portion (1),
The cam (16) is rotatably supported by the fixed portion (1) by sliding its flat surface (16a) and outer peripheral surface (16b) against the inner wall of the cam housing portion (1d). Synchronous mobile device characterized.

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