JPH0115562Y2 - - Google Patents

Description

[Detailed description of the invention] In this invention, a conveyor chain 3 is stretched along rails 2, 2 provided on the machine frame 1, and a pallet 4 is supported by the rails 2, 2 and moves in the direction of the rails 2, 2. A friction braking sprocket 5 is supported by a bearing 7, and one end of a support shaft 6 of the sprocket 5 is supported by a bearing 7.
Both arms 7a, 7a of the same bearing 7 are bent toward the sprocket 5 side, and supported so as to be able to rise and fall along straight inner guides 9, 9 passing through both bent ends. A stopper 9a 7a is provided, and the bearing 7 is pressed down by coil springs 8, 8 provided on the outer peripheries of the guides 9, 9, respectively, and the sprocket 5 is provided at a position where it meshes with the chain 3. This relates to pallet conveyors.

The chains 3, 3 are formed so that the chains 3, 3 bypass the reversing rollers 3a, 3b, respectively, at the connection between the terminal end and the start end thereof, and the pallet 4 is supported by the rails 2, 2 by wheels 10, and Guide rollers 11, 11 provided on the pallet 4 can hold one of the rails 2 and move the pallet 4 in the direction of the rail 2. The friction braking sprocket 5 is pressed by a screw 13 in the direction of the support shaft 6 by a coil spring 12 via a friction plate 7b freely supported on the support shaft 6. In the figure, 14 is the drive sprocket of the chain 3, and 15 is its prime mover.

Therefore, the drive sprocket 14 is started and the chain 3
When the pallet 4 is moved in the direction of arrow a in FIG. It moves in the direction. At the connection point, the sprocket 5 meshes with the chain 3 up to the top of the end roller 3a, but as the pallet 4 moves in the direction of arrow a, the sprocket 5 disengages, and the sprocket 5 disengages from the chain 3 until it reaches the top of the start end roller 3b of the next conveyor chain 3. At this point, the sprocket 5 meshes with the chain 3 again. During this engagement, the teeth 5a of the sprocket 5 interfere with the connecting pin 3c of the chain 3 and are lifted, but the pallet 4 is not lifted and the support shaft 6 and bearing 7 rise against the springs 8, 8, and the pallet 4 is lifted up. Due to inertial movement or pressing movement in the direction of arrow a, the teeth 5a are fitted downwardly between the connecting pins 3c, 3c of the chain 3, and this downward fitting is caused by the lowering of the bearing 7 by the force of the springs 8, 8. It is something that can be done. When the teeth 5a are thus fitted between the connecting pins 3c, 3c of the chain 3, the pallet 4 moves in the direction of arrow a along with the chain 3 due to the frictional braking force.

Conventionally, precision workpieces on the pallet 4 were subjected to shocks due to interference between the teeth 5a and the connecting pins 3c, producing interference noise and hindering precision machining, resulting in defects that made it difficult to obtain a smooth moving pallet conveyor. .

This proposal was made in view of the above defects, and
Since the present invention is constructed as described above, there is an advantage that the shock caused by the interference between the teeth 5a of the sprocket 5 and the connecting pin 3c of the chain 3 is eliminated, and a smoothly moving pallet conveyor can be obtained.

[Brief explanation of the drawing]

Figure 1 is a side view showing the proposed pallet conveyor, Figure 2 is an enlarged cutaway side view of the conveyor, and Figure 3 is an enlarged side view of the conveyor.
The figure is a bottom view of FIG. 2. 1... Machine frame, 2... Rail, 3... Conveyor chain, 4... Pallet, 5... Friction braking sprocket, 6... Support shaft, 7... Bearing, 7a... Both arms, 8... Coil Spring, 9...direct guide,
9a...stopper.

Claims (1)

[Claims for Utility Model Registration] (1) A conveyor chain 3 is stretched along the rails 2, 2 provided on the machine frame 1, is supported by the rails 2, 2, and moves in the direction of the rails 2, 2. A friction braking sprocket 5 is pivotally supported on the pallet 4, one end of a support shaft 6 of the sprocket 5 is supported by a bearing 7, and both arms 7a, 7a of the bearing 7 are bent toward the sprocket 5 side and both bent ends are supported by a bearing 7. A stopper 9a for the arms 7a, 7a is provided at the lower end of the guides 9, 9, which are supported so as to be movable up and down along the straight inner guides 9, 9 that pass through the guides 9, 9.
The bearing 7 is pressed down by the coil springs 8, 8 provided on the outer periphery of the sprocket 5, respectively.
A pallet conveyor is provided at a position where it meshes with the chain 3. (2) The pallet conveyor according to claim 1, wherein the friction braking sprocket 5 is pressed in the direction of the support shaft 6 by the spring 12 via the friction plate 7a freely supported on the support shaft 6.