JP3133238U - Weld nut feeder - Google Patents

Abstract

A weld nut supply device capable of reliably supplying a weld nut to a welding position is provided.
When the weld nut 20 is received by the nut receiver 5, the opening of the drop prevention hinge 11 is suppressed, and when the weld nut 20 is skewed by the supply rod 4, the fall prevention hinge 11 is opened. It is characterized by providing a door opening inhibiting means that does not inhibit The door opening prevention means is movable in a direction orthogonal to the direction in which the drop prevention hinge 11 opens, and a hinge stopper 17 disposed on the front side of the drop prevention hinge 11 and an air cylinder 15 for moving the hinge stopper 17. When the weld nut 20 is received by the nut receiver 5, the air cylinder 15 moves the hinge stopper 17 on the locus where the fall prevention hinge 11 opens and closes, and prevents the fall prevention hinge 11 from opening. .
[Selection] Figure 3

Description

  The present invention relates to an improvement of a weld nut supply device for supplying a weld nut to a welding position.

  2. Description of the Related Art Conventionally, for example, automobile parts and the like are often used in which a weld nut is welded to a predetermined position of a base material, and an electric resistance welder is generally used to weld both. Recently, it has been proposed that unattended automatic welding is performed using a perforated part welding apparatus as disclosed in Patent Document 1, which improves quality, improves the efficiency of the welding process, reduces costs, and the like. ing

  Conventionally, as shown in FIG. 5 and FIG. 6, a weld nut supplied from a nut feeder is supplied to a supply head 50, and a supply rod 51 that expands and contracts in the axial direction in the supply head 50 into a screw hole of the weld nut. Was skewered and supplied to the welding position. The weld nut supplied from the parts feeder is received and held by the nut receiver 53 before being skewered by the supply rod 51. A drop-off prevention hinge 54 that is always biased in a closing direction by a torsion spring 55 is attached to the tip of the supply head 50 to prevent the supply head 50 from falling off when the weld nut is received by the nut receiver 53. ing.

However, as shown in FIG. 7 and FIG. 8, the weld nut 60 may protrude from the supply head 50 without being able to hold down the weld nut 60 with the drop prevention hinge 54. When the supply rod 51 is extended in this state, as shown in FIG. 8, the supply rod 51 does not pierce the screw hole 60 a of the weld nut 60, and the weld nut 60 is skipped, and the weld nut 60 is placed at the welding position. There was a problem that it could not be supplied.
JP 2002-307191 A

  The present invention solves the above problems and provides a weld nut supply device that can reliably supply a weld nut to a welding position.

In order to solve the above problems, the present invention includes a cylindrical supply head, a supply rod housed in the supply head and extending and contracting in an axial direction, and a nut receiver disposed in an opening portion of the supply head. And a drop-off prevention hinge that is normally biased in the closing direction and closes the opening of the supply head, receives the weld nut supplied from the nut feeder with the nut receiver, and in this state, in the screw hole of the weld nut, In the weld nut supply device that skewers the supply rod and supplies the weld nut to the welding position,
When the weld nut is received by the nut holder, the door opening of the drop-off prevention hinge is inhibited, and when the weld nut is skewed by the supply rod, the door opening of the drop-off prevention hinge is not inhibited. Means is provided.

The door opening prevention means is comprised of a hinge stopper disposed on the front side of the falling prevention hinge, and a moving means for moving the hinge stopper, which is movable in a direction perpendicular to the direction in which the falling prevention hinge opens.
When receiving the weld nut with the nut receiver, the moving means moves the hinge stopper on a locus on which the fall-off prevention hinge opens and closes,
When the weld nut is skewered with the supply rod, the moving means is configured to retract the hinge stopper from a locus on which the fall-off prevention hinge opens and closes.

  The moving means is an air cylinder.

  A guide for holding a hinge stopper is provided.

  When receiving the weld nut with the nut holder, a door opening prevention means is provided to prevent the opening of the fall prevention hinge, and when the weld nut is skewered with the supply head, the door opening of the fall prevention hinge is not inhibited. Therefore, it is possible to reliably prevent the weld nut from falling off the supply head.

  The door opening prevention means is movable in a direction perpendicular to the direction in which the fall prevention hinge is opened, and is composed of a hinge stopper disposed on the front side of the fall prevention hinge and a moving means for moving the hinge stopper, and a weld nut When the nut is received by the nut receiver, the moving means moves the hinge stopper on the locus where the fall-off prevention hinge is opened and closed, and when the weld nut is skewered by the supply rod, the moving means includes the If the hinge stopper is configured to be retracted from the locus on which the drop prevention hinge is opened and closed, it is possible to reliably prevent the weld nut from falling off the supply head with a simple structure.

  When the moving means is an air cylinder, air piping disposed in the factory can be used, so there is no equipment cost. In addition, it has good response and does not malfunction.

  Since the guide for holding the hinge stopper is provided, the movement of the hinge stopper is ensured and the durability is improved.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a side view of a weld nut supply device showing an embodiment of the present invention, FIG. 2 shows a front view of the weld nut supply device, and FIG. 3 shows a cross-sectional view taken along line AA of FIG. Reference numeral 1 denotes a supply pipe, which is a pipe for supplying a weld nut 20 supplied from a nut feeder (not shown) to a nut receiver 5 described later. The supply pipe 1 has a rectangular cross-sectional shape, and the dimension in the height direction of the cross-section is larger than the dimension in the height direction of the weld nut 20, but the dimension in the width direction of the weld nut 20. This also prevents the supplied weld nut 20 from rotating in the supply pipe 1.

  The seat surface of the weld nut 20 is provided with a disk-shaped flange 20b. A plurality of projections 20a are projected from the lower surface of the flange 20b. The projection 20a is attached by concentrating an electric current at the time of electric resistance welding, melting at the time of welding, melting with a molten metal of a member to be welded, and being integrated with a member to be welded.

  Reference numeral 2 denotes a substantially cylindrical supply head. The supply pipe 1 is attached so as to be orthogonal to the axial direction of the supply head 2 so as to face the opening 2 a of the supply head 2.

  A supply rod 4 is slidably housed inside the supply head 2. The supply rod 4 is extended and contracted by an air cylinder (not shown) attached coaxially to the rear end of the supply head 2.

  A plate-like bracket 2b is provided at the tip of the supply head 2 on the side opposite to the side where the supply pipe 1 is attached, and a bolt hole 2d is formed at the tip of the bracket 2b. As shown in FIGS. 1 and 3, a nut receiver mounting recess 2c is formed between the bracket 2b and the tip of the supply head 2, and a nut receiver 5 is disposed in the nut receiver mounting recess 2c. ing. In other words, the nut receiver 5 is disposed in the opening portion of the supply head 2 at the position where the opening end 1a of the supply pipe 1 faces. The nut receiver 5 is fixed to the tip of the supply head 2 by the tip of the bolt 8 screwed into the bolt hole 2 d of the bracket 2 b pressing the bottom surface of the nut receiver 5. A nut 9 is attached to the threaded portion of the bolt 8, and the nut 9 is tightened to the bracket 2b side to prevent the bolt 8 from loosening. Thus, the nut receiver 5 is attached to the supply head 2 so that it can be easily detached.

  As shown in FIG. 3, the nut receiver 5 is positioned on the extension line of the opening end 1 a of the supply pipe 1. By configuring in this way, the weld nut 20 supplied from the nut feeder flows through the inside of the supply pipe 1 and is received by the nut receiver 5 from the open end 1a of the supply pipe 1. Even if the supply method from the nut feeder to the open end 1a of the supply pipe 1 is a method of sliding down the supply pipe 1 by its own weight, the weld nut 20 is blown into the supply pipe 1 to blow it. However, there is no problem even if it is a method of circulating the gas in the supply pipe 1.

  A drop prevention hinge 11 is attached to the tip of the supply head 2 so as to close the opening of the supply head 2. The drop-off prevention hinges 11 are attached to both side surfaces of the front end portion of the supply head 2 by mounting bolts 12 one by one. The drop-off prevention hinge 11 is always urged in a closing direction by a torsion spring 13 attached to the support shaft 11a of the drop-off prevention hinge 11, and closes the opening of the supply head 2. This drop prevention hinge 11 prevents the weld nut 20 received by the nut receiver 5 from dropping from the supply head 2.

  An air cylinder 15 is disposed at the tip of the nut supply pipe 1. The air cylinder 15 is attached to the supply pipe 1 by being supported by a bracket 16 that holds the nut supply pipe 1. The air cylinder 15 has a cylinder shaft 15a that expands and contracts. The air cylinder 15 is disposed so that the direction in which the cylinder shaft 15a expands and contracts is orthogonal to the direction in which the drop-off prevention hinge 11 opens. In this embodiment, the air cylinder 15 is arrange | positioned so that the cylinder shaft 15a may extend below.

  An air supply / exhaust pipe 19 is connected to the air cylinder 15. By supplying and exhausting air to and from the air cylinder 15 through the air supply / exhaust pipe 19, the cylinder shaft 15a expands and contracts.

  On both sides of the cylinder shaft 15a of the air cylinder 15, guide shafts 15b are attached so as to be extendable in the same direction as the direction in which the cylinder shaft 15a expands and contracts.

  A plate-like hinge stopper 17 is attached to the ends of the cylinder shaft 15a and the guide shaft 15b. The hinge stopper 17 is held by the guide shaft 15b and is moved up and down by the cylinder shaft 15a. By comprising in this way, the hinge stopper 17 is arrange | positioned so that a movement in the direction orthogonal to the direction which the fall prevention hinge 11 opens is orthogonal. In the state where the cylinder shaft 15a is extended, the hinge stopper 17 is positioned on the locus where the drop prevention hinge 11 is opened and closed. In other words, when the cylinder shaft 15a is extended, the hinge stopper 17 is positioned on the front side of the pair of drop-off prevention hinges 11. In the state where the cylinder shaft 15a is extended, the hinge stopper 17 prevents the door 11 from opening off the fall prevention hinge 11.

  On the other hand, when the cylinder shaft 15a is contracted, the hinge stopper 17 retracts from the locus where the drop prevention hinge 11 opens and closes, does not prevent the fall prevention hinge 11 from opening, and the fall prevention hinge 11 can be opened and closed freely. It becomes a state.

  Next, the operation of the present invention will be described. FIG. 5 is an upper cross-sectional view showing a use state of FIG. 4. As shown in FIGS. 3A and 4A, the weld nut 20 supplied from the nut feeder slides down in the supply pipe 1 and is received by the nut receiver 5. In this state, as shown in FIG. 3A, the cylinder shaft 15a extends downward, and the hinge stopper 17 moves downward to be positioned on the front side of the drop-off prevention hinge 11. Yes. In other words, in this state, the hinge stopper 17 is located on the locus where the drop prevention hinge 11 opens and closes, and thus prevents the drop prevention hinge 11 from opening. Since the drop prevention hinge 11 does not open, the weld nut 20 is reliably prevented from dropping from the supply head 2.

  When the supply rod 4 is extended and the weld nut 20 is skewed with the supply rod 4, as shown in FIG. 3B, the cylinder shaft 15a contracts upward, and the hinge stopper 17 moves upward. . That is, in this state, the hinge stopper 17 is in a state of being retracted from the locus on which the drop prevention hinge 11 opens and closes, so that the drop prevention hinge 11 is openable and closable.

  When the supply rod 4 is extended in this state, the supply rod 4 is skewed into the screw hole 20c of the weld nut 20 as shown in FIG. 3B and FIG. Is pushed by the weld nut 20 to open the fall prevention hinge 11 and the weld nut 20 is supplied to the welding position. (State (C) of FIG. 4)

  As described above, the operation of the air cylinder 15 is interlocked with the operation of the supply rod 4, and the air cylinder 15 and the supply rod 4 are controlled by a relay circuit or a programmable logic controller (sequencer (registered trademark)). It has become.

  The moving means for moving the hinge stopper 17 is not limited to the air cylinder, and may be a hydraulic cylinder, an electromagnetic actuator, or the like.

  Although the present invention has been described above in relation to the most practical and preferred embodiments at the present time, the present invention is not limited to the embodiments disclosed herein. However, it can be appropriately changed without departing from the spirit or idea of the invention that can be read from the claims and the entire specification, and a weld nut supply device with such a change is also understood to be included in the technical scope. There must be.

It is a side view of the weld nut supply apparatus which shows embodiment of this invention. It is a front view of the weld nut supply apparatus which shows embodiment of this invention. It is a sectional side view which shows the use condition of this invention. (A-A cross section of FIG. 2) It is an upper section showing the use condition of the present invention. It is a side view of the conventional weld nut supply apparatus. It is a front view of the conventional weld nut supply apparatus. It is a sectional side view which shows the state of use of the conventional weld nut supply apparatus. It is an upper section showing the state of use of the conventional weld nut supply device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Supply pipe 1a Open end 2 Supply head 2a Opening part 2b Bracket 2c Nut receiving attachment recessed part 2d Bolt hole 4 Supply rod 5 Nut receiving 8 Bolt 9 Nut 11 Drop prevention hinge 11a Support shaft 12 Mounting bolt 13 Torsion spring 15 Air cylinder 15a Cylinder Shaft 15b Guide shaft 16 Bracket 17 Hinge stopper 19 Air supply / exhaust pipe 20 Weld nut 20a Projection 20b ２０ 20c Screw hole 50 Supply head 51 Supply rod 53 Nut support 54 Fall-off prevention hinge 55 Torsion spring 60 Weld nut 60a Screw hole

Claims (4)

A cylindrical supply head, a supply rod housed in the supply head and extending and contracting in the axial direction, a nut receiver disposed in an opening portion of the supply head, and constantly biased in a closing direction. It has a drop-off prevention hinge that closes the opening, and receives the weld nut supplied from the nut feeder by the nut receiver. In this state, the supply rod is inserted into the screw hole of the weld nut, and the weld nut is moved to the welding position. In the weld nut supply device to supply,
When the weld nut is received by the nut holder, the door opening of the drop-off prevention hinge is inhibited, and when the weld nut is skewed by the supply rod, the door opening of the drop-off prevention hinge is not inhibited. A weld nut supply device comprising means. The door opening prevention means is comprised of a hinge stopper disposed on the front side of the falling prevention hinge, and a moving means for moving the hinge stopper, which is movable in a direction perpendicular to the direction in which the falling prevention hinge opens.
When receiving the weld nut with the nut receiver, the moving means moves the hinge stopper on a locus on which the fall-off prevention hinge opens and closes,
2. The weld nut according to claim 1, wherein when the weld nut is skewered with the supply rod, the moving means is configured to retract the hinge stopper from a locus on which the fall-off prevention hinge opens and closes. Feeding device.   The weld nut supply device according to claim 2, wherein the moving means is an air cylinder.   The weld nut supply device according to claim 2 or 3, wherein a guide for holding a hinge stopper is provided.

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