JPS58200848A - Intermittent feed device using screw - Google Patents

Abstract

PURPOSE:To prevent pallets from lowering of accuracy of its stop position due to the uneven stop angle of a drive shaft when each pallet fixed on a pin fitted into a male screw groove of the drive shaft is transferred on the basis of the rotation and the stoppage of the drive shaft by providing a specific linear part in the said-groove. CONSTITUTION:Pallets 4 fixed on pins 3 fitted into a male screw groove 2 of a long drive shaft 1 are successively transferred on the basis of the rotation and the stoppage of the drive shaftf 1. At this stage, a linear part A is cut to cross the axis at a right angle in a proper length on an upper face groove at the stop part of the drive shaft. This construction permits to improve the accuracy of the stop position of each pallet 4, since even the uneven stop angle of the drive shaft 1 cannot give any influence to the stop position of the pallet 4.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for intermittent feeding of pallets in a base machine used for automatic assembly.

Conventional intermittent feeding methods operate by fixing the pallet to a chain, etc., but there are problems such as poor pallet stopping accuracy, and it is necessary to remove the pallet from the drive device while the machine is operating. is extremely difficult.

The object of the present invention is to improve the accuracy of stopping the pallet, to smoothly operate and stop the pallet, and to make it easy to attach and detach the pallet to a drive device.

This invention will be explained as follows 1) based on the drawings.

Figure 1 shows an example of an intermittent feeding device, and shows the pallet 2 in a stopped position.

When the drive shaft 1 rotates, the pin 6 fitted in the groove moves along the lead of the drive shaft 1 and rotates the drive shaft 1 to the next stop 11'.

Pallet 2 is fixed to pin 6 and moves to pin 6 and j(.

Figure 2 is a detailed view of the M portion of the drive shaft 1 at the stop position of the pin 5, and the shaded area A with a smaller lead indicates that variations in the stop angle of the drive shaft 1 affect the stop position of the pallet 2. This improves the accuracy of the pallet stop fE.Also, in the shaded area A, since the lead is small, it can be easily attached and detached from the drive shaft 1 in a direction perpendicular to the center of the drive shaft.

In this invention, as explained above, by using a shaft with a partially reduced lead as the drive shaft of the intermittent feeder, it is possible to create an intermittent feeder that operates smoothly with high stopping accuracy and allows pallets to be freely attached and detached. effective.

[Brief explanation of drawings]

FIG. 1 shows an example of an intermittent feeding device, and FIG. 2 is a partially detailed view of the drive shaft 1. As shown in FIG. 1 Drive shaft 2 - Pallet 6 - Pin A... Small part of the lead! Patent Applicant Yoshio Daiki Drawings Figure 1/Figure 2 Procedural Amendment 11F (Voluntary) 1 ・11 Indications Show 1u 57'l Patent Application No. 074996゛(1
Person who conducts business 1'l L: Relationship Patent applicant 5 Lot 11 instruction L: Ifj' if as per the attached sheet Specification (correction) 1, Name of invention Intermittent feeding method using screw 2, Claims: In a linear intermittent transfer device that sequentially transfers pallets fixed to bins fitted into grooves of a male drive shaft by rotating and stopping a long drive shaft, the vertical length i of the upper surface groove in the drive shaft stop part is An intermittent feeding method using a screw characterized in that a straight line section is carved in a direction perpendicular to the shaft center so that variations in the stop angle of the drive shaft do not affect the stop position of the pallet. 3. Detailed Description of the Invention The present invention relates to a pallet intermittent feeding method that is driven by a long drive shaft and has high stopping accuracy in a base machine used in an automatic assembly machine or the like. Conventional intermittent feeding methods include fixing the pallet to a chain or the like and using a cylindrical cam, but these methods lack precision in stopping the pallet, making it difficult to change the feed pitch, and the machine There were drawbacks such as the fact that it was very difficult to attach and detach the pallet from the drive device during operation. Therefore, the present invention aims to provide a linear intermittent transfer device that sequentially transfers pallets fixed to bins that fit into the grooves of the male thread of the drive shaft, in which the rotation of the long drive shaft is stopped by a clutch brake, a brake motor, etc. A straight line section perpendicular to the shaft center is carved at an appropriate length to prevent the drive shaft stop angle from affecting the pallet stop position. Variations in the stop angle of the drive shaft due to the brake motor, etc.
Machining the straight line groove on the stop part improves pallet stopping accuracy without affecting the pallet stopping position. Also, since the pallet stops when the straight part is on the top, the pallet can be served independently in a direction perpendicular to the center of the axis. Furthermore, since each pallet is transferred independently, it is also possible to remove any pallet and equip a large jig to the remaining pallet, and the feed screws of the drive shaft can be set at equal intervals within one or at arbitrary intervals. This provides an intermittent feeding method using long screws, which could not be achieved with conventional devices, such as being able to carve at regular pitches, allowing pallets to be fed at arbitrary pitches. It is. An embodiment of the present invention will be described below with reference to the drawings. As the elongated drive shaft (1) rotates and stops, the groove of the drive shaft male thread (
2) In a linear intermittent transfer device that sequentially transfers pallets (4) fixed to bins (3) that are fitted into It is engraved with. In this invention, the long drive shaft (1) is rotated by a clutch brake, a brake motor, etc. Bottle (3) that fits into the groove (2) of the male thread of the drive shaft to be stopped
The pallet (4) fixed to Since the straight line part (A) is carved in the direction, even if there is some variation in the stopping angle of the drive shaft (1), it will not affect the stopping position of the pallet (4). . As a result, even if variations occur in the stopping angle of the drive shaft due to the clutch brake, brake motor, etc., the stopping position of the pellet is not affected, and the accuracy of the stopping position of the pallet can be improved. In this way, the present invention uses a long drive shaft to obtain a high stopping position, and since the straight part of the groove stops facing the upper surface of the pallet, any pallet can be easily moved in a single direction with respect to the shaft center. It is possible to attach and detach in the right angle direction ("Yes, it is also possible to remove this single pallet and install it on a large jig". A new long screw is used, which has a number of unprecedented effects, such as being able to carve equal intervals or intervals at the pitch between songs, allowing the pallet to be transported at any pitch. This is an intermittent feeding method. 4. Brief explanation of the drawings Drawing 1uj shows an embodiment of the present invention, Fig. 1 is an overall front view showing the stopping position of the pallet, and Fig. 2 shows a partial cutout of the drive shaft for details. 1. Drive shaft 2. Screw 1l18.. Bin 4. Pallet) A. Straight section Fig. 1 Fig. 2

Claims (1)

[Claims] The lead of the male screw or other curve is used for intermittent feeding, and the variation in the stopping angle of the shaft will cause the pallet to stop tJ.
An intermittent feeding method characterized by making a part of the lead of the drive shaft small so as not to affect the two positions.