JPH0244938Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention primarily relates to a stud feeding device for automatically and intermittently feeding relatively small studs one by one to a stud welding device.

[Prior art]

Conventionally, relatively small studs for stud welding were supplied by means such as loading a certain amount of studs in series into the welding gun itself and feeding them one by one to the tip of the gun using spring pressure or other means. However, loading the gun itself was troublesome and was not suitable for automatic welding. In addition, various feeders are used as automatic feeding devices for feeding small rod-shaped bodies, but in order to feed studs one by one to the welding gun intermittently, the device must be relatively large. The dot was hot.

[Means for solving problems]

Therefore, the present invention is compact and can separate the tipmost stud and other studs that are conveyed in series and supply them one by one to the stud welding machine, and is easy to handle even when the studs have different lengths. The purpose is to provide a supply device that can handle this, and its configuration is as follows.

That is, the stud storage portion 2 has a stud receiver 3 that is opened upward, and the stud receiver 3
is formed so that the lower end of the conveyance path 1 and the stud storage section 2 are aligned when the stud storage section 2 is in the first position,
The stud receiver 3 reciprocates from the first position to the second position in a direction crossing the conveying path 1. Further, when the stud receiver 3 is in the first position, the rod 5 reciprocates freely into and out of the through hole 4 on the bottom surface of the stud receiver 3. The protruding position of the tip of the rod 5 is set by rod end positioning means 10 so that it can freely move up and down.
Further, a holding means 8 is provided at the lower end of the conveyance path 1, and a holding means 8 is provided at the lower end of the conveyance path 1, thereby connecting the leading stud 6 housed in the stud receiver 3. The outer surface of the trailing stud 7 is detachably held. In addition, stud receiver 3
When the stud housing 2 is in the second position, the air conveying path 9 is aligned with the opening of the stud housing 2 and the through hole 4.
It is characterized by having a.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a longitudinal sectional view of the device, FIG. 2 is a plan view thereof, and FIG. 3 is a schematic perspective view showing the clamping portion of the holding means 8 that separates the leading stud 6 and the trailing stud 7 arranged in series. FIG. 4 is an enlarged view showing an example of the preceding stud 6 targeted by this supply device;
This figure is a sectional view taken from the same direction as FIG. 2, and shows the state in which the stud receiver 3 has been moved to the second position. The outline of this device is as shown in FIG.
It has an air cylinder 19 and an air-driven holding actuator 17 attached in the planar direction of the base 20, as well as an air cylinder 11 and an air conveyance path 9 attached in a direction perpendicular to the base 20.

First, an air cylinder 19 mounted in the plane of the base 20 has its piston rod tip connected to the stud receiver 3. The stud receiver 3 is then moved in the plane direction of the base 20 from the first position in FIG. 1 to the second position in FIG. 5.
Further, this stud receiver 3 is provided with a stud storage section 2, and a through hole 4 having an inner diameter smaller than that of the stud storage section 2 is bored in the bottom surface thereof. The through hole 4 is formed to coincide with the axis of the air cylinder 11 at the first position of the stud receiver 3, and the conveyance path 1 is provided on the axis. For example, a pipe 18 is connected to this conveyance path 1, and a large number of leading studs 6, 7 are supplied to the pipe 18 in a line-up in series. It is preferable to connect a known hopper feeder (not shown) to the tip of the pipe 18 (vibration type, swing type, vertical movement type, rotation type, circulation type, fluid type, etc.). A holding means 8 is provided at the lower end of this conveyance path 1 as shown in FIGS. 1 and 3. That is, the holding means 8 includes, for example, a pair of clamping bodies, and the gap between the clamping bodies can be opened and closed via the holding actuator 17. Next, as is clear from FIGS. 1 and 5, the air cylinder 11 is of a double-acting type with rods on both sides. The lower end of a narrower rod 5 is screwed and fixed to the upper piston rod, and a cylindrical rod end positioning means 10 of an appropriate length is screwed to the lower end of the rod. This rod end positioning means 10
A plurality of suitable cylindrical bodies with different axial lengths are prepared, and by replacing them, the protruding length of the tip of the rod 5 can be changed, and leading studs 6 of different lengths can be stored in the stud. Only one can be accommodated in section 2. Next, the air conveyance path 9 is formed at the second position of the stud receiver 3 so as to coincide with the axis of the through hole 4 and the stud housing 2, as shown in FIG. 5, and allows the compressed air to flow from below to above. , the leading stud 6 is conveyed via the air hose 16 to the stud gripping section of the arc stud welding machine.

[Effect]

Next, the operation of this device will be explained based on the drawings.

First, the leading stud 6 is not limited to the one shown in FIG. 4, but has an appropriate shape.
It has a length and diameter that allows it to be stored in.
The axial length of the rod end positioning means 10 made of a cylindrical body is determined according to the length of the preceding stud 6, and an appropriate cylindrical body is selected and fitted onto the lower end of the piston rod of the air cylinder 11, such as a screw or the like. Fix it with. This rod end positioning means 10 determines the protruding length of the tip of the rod 5, and only one leading stud 6 is stored in the stud storage portion 2. The preceding studs 6 and 7 are fed into the conveyance path 1 through a pipe 18 in a lined manner by a suitable feeder (not shown) or the like. In such a situation,
First, the holding actuator 17 is opened and closed as shown in FIG.
position. By the closing operation of the holding means 8, the outer periphery of the lowermost trailing stud 7 connected to the leading stud 6 is clamped. This causes the subsequent stud 7
never moves downward. Next, compressed air is supplied from the air port 13 located above the air cylinder 11, and the piston 12 moves downward and is positioned as shown in FIG. Then, the rod 5 is pulled out from the through hole 4 of the stud receiver 3, and only the leading stud 6 moves slightly downward. Then, the air cylinder 19 moves to the right in FIG. 1, and the stud receiver 3 comes to the second position. Next, compressed air is supplied from the air hose 16 on the upstream side of the air conveyance path 9 to blow the leading stud 6 upward, and the air is conveyed by the air hose 16 above. The tip of this upper air hose 16 is connected, for example, to the tip of an arc stud welding gun, or is opened at a predetermined position within a range where the hand of an arc stud welding robot can move, and the leading stud 6 is held there. It is something that makes you When the leading stud 6 is transported in this way, the piston rod of the air cylinder 19 moves to the left, and the stud receiver 3
returns to the first position. Then, the holding actuator 17 is actuated to once open the holding means 8 and close it again. Then, only one subsequent stud 7 is stored in the stud storage section 2. The above-described operations are then repeated. In addition, each air cylinder 19, 11 and the holding actuator 1
The operation timing of 7 is set in the above-described order by a timer or by known means such as an appropriate sensor. The leading stud 6 is arc-welded to the base material 21 using a welding gun, as shown in FIG. 7, for example.

Next, if the length of the leading stud is shorter than that shown in FIG. 1, select one with a shorter length for the cylindrical rod end positioning means 10 as shown in FIG. It can be fixed by fitting it onto the lower end. Thereby, the tip of the rod 5 protrudes longer into the stud storage part 2, and only one small leading stud 6 can be stored in the stud storage part 2. Note that when the stud receiver 3 moves, the rod 5 moves downward prior to the movement, and the rod end positioning means 10 moves from the state shown by the solid line to the state shown by the chain line. Then, the leading stud 6 falls to the bottom of the stud storage section 2 and is stored there.
Then, the stud 6 is conveyed to an appropriate position from the air conveyance path 9 through the above-described sequence.

[Modified example]

It should be noted that the present invention is of course not limited to the above-mentioned embodiments, and for example, the rod end positioning means 10 shown in the drawing is most preferable, but is not limited thereto.
For example, the length of the leading stud 6 may be changed as appropriate, or the length of the spacer 23 at the upper end of the air cylinder 11 may be changed as appropriate. however,
According to the illustrated embodiment, the lowermost protruding rod end positioning means 10 can be easily replaced, so that the length of the leading stud 6 can be adjusted more quickly. Further, as another example of the holding means 8 for holding the succeeding stud 7, the vast lower surface of the stud 7 may be held detachably by a locking pawl or the like. In short, it is sufficient to temporarily hold the trailing stud 6 in the position shown in FIG.

[Effect of idea]

The stud supply device of the present invention has the above-mentioned configuration and has the following effects.

(1) Since this device has a rod end positioning means 10 for vertically movably setting the protruding position of the tip of the rod 5, the leading studs 6 of different lengths are intermittently moved one by one within a certain range. can be supplied.

(2) Furthermore, in this device, since the through hole 4 and the stud storage portion 2 are provided in alignment with the air conveyance path 9 at the second position (FIG. 5) of the stud receiver 3, the leading stud 6 is intermittently supplied. The operation can be performed extremely easily and reliably in a space-saving manner.

(3) This stud supply device also has air conveyance path 9.
Since the studs are transported by the welding machine, the studs can be smoothly and quickly supplied to the welding machine even if the transport path is curved to some extent and spans a long distance.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the device, FIG. 2 is a plan view thereof, and FIG. 3 is a schematic perspective view showing the clamping portion of the holding means 8 that separates the leading stud 6 and the trailing stud 7 arranged in series. FIG. 4 is an enlarged view showing an example of the preceding stud 6 targeted by this supply device;
This figure is a sectional view taken from the same direction as FIG. 1, and shows the state in which the stud receiver 3 has been moved to the second position. FIG. 6 shows another embodiment of the rod end positioning means 10 in which the leading stud 6 is shorter;
FIG. 7 is an explanatory diagram showing a state in which the leading stud 6 is welded to the base metal 21. 1... Conveyance path, 2... Stud storage section, 3...
Stud receiver, 4... Through hole, 5... Rod, 6
...Preceding stud, 7...Subsequent stud, 8...
Holding means, 9... Air conveyance path, 10... Rod end positioning means, 11... Air cylinder, 12
...Piston, 13...Air port, 14...
Recessed portion, 15... Piston rod, 16... Air hose, 17... Holding actuator, 18...
...pipe, 19 ... air cylinder, 20 ... base, 21 ... base material, 22 ... screw, 23 ... spacer.

Claims (1)

[Scope of utility model registration request] a first position is located at the lower end of the conveyance path 1;
The stud receptacle 3 is reciprocated in the direction crossing the conveyance path 1 from the first position to the second position, and the stud receiving portion 2, which is aligned with the conveyance path 1 at the first position, opens upward. A positioning rod 5 that reciprocates freely into and out of the through hole 4 on the bottom surface of the storage portion 3, and a rod end positioning means 1 that sets the protruding position of the tip of the rod 5 so as to be vertically movable.
0, a holding means 8 which is provided at the lower end of the conveyance path 1 and removably holds the outer surface of the subsequent stud 7 which is connected in series with the upper surface of the preceding stud 6 housed in the stud receiver 3; A stud supply device for stud welding, comprising an air conveyance path 9 provided in alignment with the opening of the storage section 2 and the through hole 4 in a second position.