JPH0117426Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a welding nut forward/reverse sorter used in a welding nut supply mechanism that continuously supplies a welding nut to any part of the welded material in the same posture when welding the welding nut to the welded material. Regarding correction devices.

Generally, when assembling machinery and other equipment,
In the case of feeding small-diameter parts with different front and back sides in the same position, feeding mechanisms have been devised that mechanically perform this feeding. In the supply mechanism,
A mechanism for separating the parts in the correct posture from those in the opposite posture, and a mechanism for correcting the objects in the reverse posture to the normal posture are indispensable.

Conventionally, the mechanism for sorting between the forward and reverse parts is as follows:
There are two methods: photoelectric detection method and air sensor detection method.

The photoelectric detection method consists of a light emitter and a receiver with a photoelectric element, which emits a signal according to the direction and orientation of the part. Upon receiving this signal, the control device compares the signal with a setting program and calculates the part. This is a method of electronically controlling the discharge or reject.

On the other hand, in the air sensor detection method, as shown in Fig. 1A and Fig. 1B, an air passage b is provided which leads into a block a in which the posture of the part is to be checked. If the air passage b is closed by part c, it is determined to be the opposite, and if the air passage b is opened as shown in FIG. 1B, it is determined to be positive. That is, in the air sensor detection method, a sensor detects whether or not air flows out from the air path b, and based on the detection, it is determined whether the posture of the component is normal or reverse.

In the present invention, unlike the two conventional methods, a sensor is not used, but only a mechanical structure is used to specifically select whether the welding nut is in the normal or reverse direction, and furthermore, the direction of the welding nut located in the opposite direction is corrected in the normal direction. It is an object of the present invention to provide a weld nut forward/reverse sorting and straightening device which performs not only the sorting but also the straightening by a mechanical structure by rationally combining the devices.

The present invention will be explained below according to an embodiment shown in the drawings.

1 in the figure is the passage of the welding nut, and both side walls 1
It has a shape so that it passes through a and 1b while abutting its axial surfaces. A selector 2 is movable left and right, and is pressed by a spring 3 in a direction opposite to the direction of the arrow. 4 is the primary stop rod of the welding nut attached to the main body of the selector 2, which has a diameter that can be inserted into the center hole of the welding nut, and is outside the passage 1 when the selector 2 is in the retracted position shown in the drawing. ,
It has a length that projects into the passage when in the forward position, and is slidably provided in a hole 5 provided on the side wall 1b of the passage 1. 6 is a secondary stop rod,
Like the primary stop rod, it is attached to the main body of the selector 2 and has a welding nut passage hole 7, which closes the passage 1 when the main body of the selector 2 is in the retracted position, and closes the passage 1 when the main body of the selector 2 is in the forward position. coincides with the passageway 1 and is slidably provided in a hole 8 provided linearly on both sides 1a, 1b of the passageway 1 to allow the welding nut to pass therethrough.

Reference numeral 9 denotes a forward/reverse sorting mechanism, which has the function of sorting the welding nuts fed into the passage 1 according to whether they are in the same or different orientations. That is, 10 is an abutting rod for the welding nut, and is slidably provided within the side wall 1a of the passage 1 with a length that reaches the passage 1. 11a,
Reference numeral 11b denotes a gap, both of which communicate with each other, and compressed air is sealed inside with plugs 12a and 12b, so that the abutment rod 10 is negatively biased in the direction of arrow A. Reference numeral 13 denotes a switch rod, which has a switch board 14 at one end. This switch-opposed rod 13 is negatively biased in the direction of arrow B by the compressed air sealed in the gap 11a. 15
is a switch, and a switch surface 16 is provided at a position corresponding to the switch panel 14 at the end.

Reference numeral 17 denotes a forward/reverse correcting mechanism, which has the function of allowing weld nuts judged to be in the normal position by the normal/reverse sorting mechanism 9 to pass through as they are, and correcting weld nuts judged to be in the opposite position to the normal attitude. That is, 18 is a rotary disk, which is configured to be freely rotatable through 360 degrees in two steps of 180 degrees. Reference numeral 19 denotes a correction path passing through the center of the rotary disk 18, which is located on the same line as the passage 1 and has the same cross-sectional shape. 20 is a tertiary stop lever, which is perpendicular to the correction path 19 and has a spring 21a.
Due to this negative force, when the tertiary stop rod 20 receives a positive signal from the forward/reverse sorting mechanism 9, the correction path 19 provided in the tertiary stop rod 20 and The passage hole 22 having the same diameter and the correction path are configured to match. 21b
is a pedestal of the spring 21a, and is in contact with a sliding surface of the straightening machine main body 23 in which the rotary disk 18 is rotatably buried.

24 is an air cylinder, which is composed of a hole formed in the rotary disk 18 and a hole formed in the straightening machine main body, and the other end of the tertiary stop rod 20 and the A piston 26 is fitted with a certain space 25 between the other end and the other end.

Reference numeral 28 denotes an alignment unit used in carrying out the present invention, and has the function of aligning welding nuts and feeding them into the passage 1 at a required speed.

In this embodiment having the above configuration, the welding nut N has a hole d in the center and protrusions e at the four corners of one side, so that a recess is formed in the center.
They are aligned by an alignment unit and fed into the passage 1 one after another. The operation when this welding nut N is fed in the normal position, that is, the position shown in FIG. 3B, will be described below. The newly introduced welding nut N ₁ comes into contact with the welding nut N ₂ and stops while the welding nut N ₂ introduced immediately before is being sorted. Then, when welding nut N ₂ finishes sorting, selector 2 is pressed in the direction of arrow N, and
The passage hole 7 of the next stop lever 6 is aligned with the passage 1.
As a result, the welding nut _N2 falls into the straightening path 19 due to its own weight. On the other hand, by pressing the selector in the direction of arrow 2, the primary stop lever 4 moves forward and fits into the hole d of the welding nut _N1 , thereby preventing _N1 from falling.

When the welding nut N ₂ falls, the selector 2 is pushed down by the spring 3 in the opposite direction of the arrow D, and the primary stop lever 4 also retreats, and the primary stop lever 4 is inserted into the hole d of the weld nut N ₁ . Get out of
The welding nut _N1 falls due to its own weight. At this time, the secondary stop lever 6 has already moved back due to the depression of the selector 2, and therefore the welding nut is
_N1 stops on the secondary stop lever 6. When stopped on this secondary stop rod 6 in a normal posture, the abutment rod 10 is a welding nut _N1 located on the same plane as the side wall 1a, so
It is not possible to proceed in the direction of arrow A, and gaps 11a, 1
The air pressure inside 1b is maintained as it is. Therefore, the switch rod 13 is still negatively biased in the direction of the arrow B, and the distance between the switch panel 14 and the switch face 16 remains constant, thereby indicating that the welding nut _N1 is in the normal position. The forward/reverse correction mechanism 17 is notified. On the other hand, the selector 2 moves forward again in the direction of arrow N, and the welding nut _N1 , like the welding nut _N2 , falls from the passage hole 7 into the correction path 19 of the forward/reverse correction mechanism 17. In the forward/reverse correcting mechanism, when the forward/reverse sorting mechanism 9 informs that it is in the normal position, no mechanism operates, and the welding nut _N1 is simply allowed to pass. The passed welding nut is sent out from the delivery port 27,
For example, a supply head (not shown) coupled to this
It is ejected from the pipe and used for welding.

Next, the operation when the welding nut _N3 is fed in an inverted position will be explained. Welding nut in reverse position
_N3 is placed on the secondary stop lever 6 in the same manner as _N1 . At this time, the welding nut _N3 is in the opposite position as shown in FIG. 3, so as shown in the enlarged view of FIG. The pressure decreases, and the switch rod 13 is attracted in the direction opposite to the direction of arrow B. As a result, the gap between the switch panel 14 and the switch surface 16 is enlarged, and this is communicated to the forward/reverse correcting mechanism 17. In response to this communication, in the forward/reverse correction mechanism 17, the piston 26 fitted into the air cylinder 24 moves forward in the direction of the arrow H, compressing the air in the space 25. Due to this compression, the tertiary stop lever 20 moves in the opposite direction of arrow C and closes the correction path 19. On the other hand, the secondary stop lever 6 that stops the welding nut N ₃ moves forward and causes the welding nut N ₃ to fall from the passage hole 7.
The welding nut N ₃ stops on the tertiary stop rod 20 . That is, as shown in Fig. 5A, the welding nut
N ₃ is still on the tertiary stop lever in a reverse position. Next, when the rotary disk 18 is rotated 180 degrees in the direction of the arrow, the welding nut _N3 is corrected to a normal posture under the tertiary stop lever 20 and falls into the outlet 27, where it is used for welding. Thereafter, the rotary disk 18 rotates 180 degrees in the same direction in preparation for feeding the next welding nut in the opposite position.

As explained above, in the present invention, only by the mechanical structure, it is possible to judge and sort whether the welding nut is in the right or wrong direction, and if the nut is in the opposite position, it is corrected to the normal position before being sent out. , it is possible to improve the efficiency of welding work, and because it does not use a light emitter, a receiver with a photoelectric element, or electronic parts, it is inexpensive and has a low failure rate.
Repairs and the like can be easily performed.

[Brief explanation of the drawing]

1A and 1B are cross-sectional views showing an embodiment of a conventional air sensor detection method, FIG. 2 is a sectional view showing an embodiment of the present invention, and FIG. 3A is a front view of a welding nut.
B is a left side view, C is a right side view, Figure 4 is a partially enlarged sectional view showing the state in which the abutting rod is in contact with the welding nut, and Figures 5A and B are sectional views showing the operating state of the disc. be. 1... Passageway, 2... Selector, 4... Primary stop lever, 6
...Secondary stop rod, 7...Passing hole, 10...Abutment rod, 18
...Rotary disk, 19...Correcting path, 20...Third stop rod.

Claims (1)

[Scope of utility model registration request] A passage through which a welding nut having a concave portion on one side is passed sequentially at a constant speed, and a passage in which the welding nut comes into contact with one side of the welding nut during the passage, and determines whether the posture of the welding nut passing through the passage is normal or reverse depending on whether or not it makes contact with the concave portion. A sorting mechanism is provided, and a disk is provided in the middle of the passage and has a through hole that communicates with the passage in the same manner as the sorting mechanism, and allows the weld nuts in the normal posture determined by the sorting mechanism to pass through as they are, and also allows the weld nuts in the reverse posture to pass through as they are. A welding nut forward/reverse sorting correction comprising a correction mechanism for stopping a welding nut in a through hole and correcting a disk formed by stopping the welding nut in the through hole by 180 degrees to a normal posture. Device.