JPH0329090Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] This invention relates to transfer machines, conveyors, and other feeding devices for machine tools. The present invention relates to a feeding device convenient for use in intermittent feeding.

[Conventional technology]

Conventionally, special chain conveyors and pneumatic cylinder mechanisms have been used as this type of feeding device.

[Problem that the invention attempts to solve]

However, since these devices transport the workpiece at approximately constant speed over the entire area between stations, if the moving speed is increased to shorten the moving time, the shock at startup and stop becomes excessive, and However, if the speed of movement was lowered to avoid the impact, the time required for movement would increase and the operating rate of the machine would decrease.

[Means to solve the problem]

The purpose of this invention is to solve such contradictions, to obtain a feeding device that can increase the moving speed between stations without causing a large impact, and to simplify its configuration. two pairs of mutually parallel guide members 3, which support a sliding member 5 connected to the transferred object and an auxiliary sliding member 7 connected to the linear feed mechanism 6 on the frame 2;
A large rack 8 parallel to the guide member 3 is provided on the sliding member 5, and the large rack 8
A large pinion 11 that meshes with the guide member 3 is rotatably supported on the auxiliary sliding member 7 by a support shaft 9, and a small pinion 13 is integrally attached to the support shaft 9 via a rotating arm 12. A swinging arm 15 rotatably supported on the frame 2 is disposed on the side of the frame 2, and the small pinion 13 is pivotally supported on the swinging arm 15 and meshes with a small rack 19 connected to the linear feed mechanism 6. It is characterized by the fact that

[Operation] When the small pinion 13 rotates once by the linear feed mechanism 6, the support shaft 9 also rotates once. As a result, the large pinion 11 rotates on the large rack 8, and the sliding member 5 advances by the pitch circumference of the large pinion 11.

Here, when the support shaft 9 rotates once, the auxiliary sliding member 7 that supports it moves over the guide member 4 by a distance twice the length of the rotary arm 12 in the direction of movement of the sliding member 5. , the speed is decelerated by the amount of movement of the auxiliary sliding member 7 at the beginning and end of the stroke, and the speed is increased in the middle of the stroke.

〔Example〕

This invention will be explained below with reference to the illustrated embodiment. In the figure, 1 is a feeding device of a machine tool or the like;
Two pairs of bar guides 3 and 4, each serving as a guide member, are provided along the longitudinal direction of the elongated frame 2.
is provided.

A sliding member 5 connected to an object to be transferred (not shown) is slidably supported on one bar guide 3, and a pneumatic cylinder serving as a linear feed mechanism to be described later is supported on the other bar guide 4. An auxiliary sliding member 7 connected to 6 is slidably supported. 8 is a large rack provided on the sliding member 5 in parallel with the bar guide 3. A support shaft 9 is rotatably supported on the auxiliary sliding member 7, and a large pinion 11 that meshes with the large rack 8 is fixed to one side of the support shaft 9, and a rotating arm 12 is fixed to the other side. A small pinion 13 is fixed to the side surface of the free end of the pinion 12 .

On the other hand, at the other end of the frame 2, a base end of a swing arm 15 provided with the pneumatic cylinder 6 is rotatably supported by a pin 16. The swinging arm 15 is made of aluminum alloy, and the pneumatic cylinder 6 is provided along the longitudinal direction at its core, and a small rack 19 is connected to the rod 6a that protrudes from the pneumatic cylinder 6 so as to be able to move forward and backward. ing. Further, the swing arm 15 is provided with a through hole 21 located on the side of the small rack 19, and the small pinion 13 is inserted from the side and is bearingly engaged with the small rack 19.

Next, the operation of this embodiment will be explained. First, a sliding member 5 connected to an object to be transferred (not shown)
In order to advance the rod 6 from the pneumatic cylinder 6
When a moves to the left in FIG. 3, the small rack 19 connected to it moves to the left, as shown in a in FIG. 12, the support shaft 9 also rotates counterclockwise. Due to this rotation, the large pinion 11 moves the large rack 8 to the left, and the rotating arm 12 causes the auxiliary sliding member 7 to retreat to the right on the bar guide 4. That is, while the sliding member 5 is given a leftward movement by the large pinion 11 and the large rack 8, this is offset and decelerated by the rightward movement of the auxiliary sliding member 7. At this time, the rotary arm 12 extends in a direction perpendicular to the direction of movement of the auxiliary sliding member 7, and the backward speed of the auxiliary sliding member 7 is at its maximum, so the speed of the sliding member 5 is at its minimum in this state. Become.

As the small rack 19 moves further to the left from this position, the auxiliary sliding member 7 gradually reduces its retraction speed, and at a position (not shown) where the rotary arm 12 has made a further 1/4 turn, the auxiliary sliding member 7 When the moving direction of the member 7 and the direction of the rotating arm 12 match, the auxiliary sliding member 7
The sliding movement of the robot stops once, and the direction of movement is reversed. Therefore, at this position, the speed at which the sliding member 5 moves and the speed at which the small rack 19 moves to the left match.

Figure b shows the state in which the rod 6a and the small rack 19 have progressed further and have completed 1/2 of the stroke. Here,
Since the rotating arm 12 is located at the lower side, the forward speed of the auxiliary sliding member 7 to the left becomes maximum, contrary to the case shown in FIG. In this state, the speed of the sliding member 5 becomes maximum.

As the small rack 19 moves further to the left from this position, the auxiliary sliding member 7 gradually reduces its forward speed, and at a position (not shown) where the rotary arm 12 has made a further 1/4 turn, the auxiliary sliding member 7 When the moving direction of the member 7 and the direction of the rotating arm 12 match, the auxiliary sliding member 7
The sliding movement of the robot stops once, and the direction of movement is reversed. Therefore, even in this position, the moving speed of the sliding member 5 and the leftward moving speed of the small rack 19 match.

In this embodiment, the length of the movement of the sliding member 5 is from the pneumatic cylinder 6 to the rod 6a.
is longer than the protruding length by the diameter ratio of the large pinion 11 to the small pinion 13, and therefore,
A relatively short pneumatic cylinder 6 allows long strokes to be moved.

[Effect of idea]

As described above, this invention utilizes the reciprocating motion of the auxiliary sliding member 7 interposed between the sliding member 5 to move the sliding member 5 driven by the linear feed mechanism 6. Since it is configured to reduce the speed at the beginning and end of the stroke and increase the speed near the center of the stroke, the sliding member 5 can start or stop moving without a large impact. Regardless, since the speed during the stroke is increased, the travel time does not increase. Furthermore, since the device is mechanically processed and does not require electrical wiring or hydraulic mechanisms, the structure is simple and the purpose stated in the heading can be achieved. Furthermore, the stroke length of the sliding member 5 can be made longer than the operating length of the linear feed mechanism 6, and a relatively large machine can be driven by the small linear feed mechanism 6.

[Brief explanation of drawings]

The drawing shows an example of this invention.
FIG. 1 is a sectional view of the device, FIG. 2 is a sectional view thereof, and FIG. 3 is an operation diagram showing the operation of the device. 1...Sliding member, 7...Auxiliary sliding member, 6...
Linear feed mechanism (pneumatic cylinder), 8...Large rack,
9... Support shaft, 11... Large pinion, 12... Rotating arm, 13... Small pinion, 19... Small rack.

Claims (1)

[Claims for Utility Model Registration] (1) Two pairs of mutually parallel sliding members 5 connected to the transferred object and an auxiliary sliding member 7 connected to the linear feed mechanism 6 supported on the frame 2. The sliding member 5 is slidably supported on the guide members 3 and 4, and the sliding member 5 is provided with a large rack 8 that is parallel to the guide member 3. rotatably bearing on the moving member 7;
A small pinion 13 is integrally attached to the support shaft 9 via a rotating arm 12, while a guide member 3,
A swinging arm 15 rotatably supported on the frame 2 is disposed on the side of the frame 2, and the small pinion 13 is pivotally supported on the swinging arm 15 and meshes with a small rack 19 connected to the linear feed mechanism 6. Feeding devices for machine tools, etc. (2) The feeding device for a machine tool or the like according to claim 1, wherein the linear feeding mechanism 6 is a pneumatic piston cylinder.