JP4484607B2 - Magazine rack for chip changer - Google Patents

Description

  The present invention relates to a magazine rack for a tip changer which is attached to a tip changer for supplying electrode tips used for resistance welding to a shank.

  For example, resistance welding machines are widely used to manufacture automobile parts and the like formed by welding body steel plates and component steel plates. The electrode tip of this resistance welder wears and deforms when used for a long time and causes poor welding, so it is necessary to replace it periodically. Conventionally, as shown in Patent Document 1, Using magazines arranged on the disc at regular intervals, the disc was sequentially rotated toward the shank and supplied. Further, a rack in which 5 to 10 electrode tips are set is sequentially moved to the shank side and supplied.

However, in the former case, there is a problem that the apparatus becomes large and a large space is required, and there is a problem that the price becomes high. In the latter case, the magazine is aligned to the shank side at every replacement. There is a problem that it takes time to move, and there is a problem that it is necessary to frequently replenish the chip because the number of electrode chips stored is small.
JP-A-4-52083

  The present invention solves the conventional problems as described above, and can reduce the size and cost of the apparatus. Also, the number of stored electrode tips can be increased, and chip replenishment work can be reduced. Was completed for the purpose of providing a magazine rack for a tip changer that can accurately supply electrode tips to the shank.

The magazine rack for a chip changer of the present invention made to solve the above-mentioned problems is a magazine rack for a chip changer that is attached to a chip changer for supplying an electrode chip used for resistance welding to a shank, and is a cylindrical rack A guide rod for guiding the chip is arranged inside the main body to form a chip conveyance path for conveying the chip in the axial direction of the rack body in an upright state, and the guide bar is penetrated in the chip conveyance path, also the through hole is not O-ring is mounted to hold the airtightness, the guide設設only the chip push-out member for pushing out the slide and tip to tip of the outlet rack body bar along and the chip extrusion Air urged to always move the member toward the front side by air injected from the rear side of the rack body It is characterized in that it has as a funnel-type.

  The magazine rack for a chip changer according to the present invention has a chip transport path for transporting chips in an upright state by disposing a guide rod for guiding a chip inside a cylindrical rack body. It has a structure that has a tip push-out member that slides along the guide rod and pushes the tip to the take-out port at the tip, so that it is easy to process and the tip of the R-shaped electrode tip is upright and accurate. In addition, the apparatus can be transported to a predetermined position, and the size and cost of the apparatus can be reduced.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
The drawing shows the case where the magazine rack for tip changer of the present invention attached to the tip changer for supplying the electrode tip used for resistance welding to the shank is set in two upper and lower stages, and FIG. FIG. 2 is a perspective view of the magazine rack, FIG. 3 is a front view, and FIG. 4 is a side view. FIG. 5 is a plan view of the workpiece take-out lid, and FIG. 6 is a plan view showing another embodiment.

In the figure, 1 is a cylindrical rack body, 2 is a guide rod for guiding a chip disposed therein, and 3 is a tip that slides along the guide rod 2 and pushes the tip to a workpiece takeout port 6 at the tip. An extruding member 4 is a packing member for air leakage prevention provided at the rear end of the rack body 1, and 5 is a work take-out opening lid attached to the front end of the rack body 1.
Reference numeral 11 denotes a box body that houses the rack body 1, 12 denotes a mounting plate for setting the box body 11 on a robot arm or the like, 13 denotes an eco-raising mechanism for imparting cushioning properties to the rack body 1, T An electrode chip S to be supplied is a shank on which the electrode chip T is mounted.

In the present invention, as shown in the figure, a chip transport path 10 is provided in which three guide rods 2 for guiding a chip are disposed inside a cylindrical rack body 1 and transports the electrode chip T in an axial direction in an upright state. In addition, a tip push-out member 3 that slides along the guide rod 2 and pushes the electrode tip T to the leading-out take-out port 6 is provided in the transport path 10.
As a result, it is not necessary to perform a conventional cutting process or the like, and the process is simple, and it is possible to accurately convey the electrode tip T having an R-shaped tip to a predetermined position in an upright state.

  In FIG. 1, the chip push-out member 3 is an air float type that is urged so as to always move forward by air injected from the rear side of the rack body 1. The air is injected by detachable air couplers 8a and 8b provided at the rear end of the rack body 1. By removing the air coupler 8b, the air float type chip push-out member 3 is moved. It is returned to the rear end of the rack body 1 so that the electrode tip T can be easily loaded. In the illustrated example, 12 electrode tips T can be loaded.

  In addition, two O-rings 7 a that maintain airtightness with the inner peripheral surface of the rack body 1 are attached to the chip push-out member 3. Further, the guide pusher 2 is passed through the chip push-out member 3, and an O-ring 7 b that keeps airtightness is attached to the through-hole portion, and the air-tightness is kept so that the chip pushout member 3 is pushed out. The operation is performed smoothly.

  Reference numeral 9 denotes a sensor that detects whether or not the electrode tip T has been normally supplied to the workpiece take-out lid 5. As a result, it is possible to effectively prevent occurrence of an electrode tip T replacement error.

  As shown in FIG. 6, the tip push-out member 3 is a trolley type that is urged so as to always move toward the front side from a spring 13 a disposed on the back side of the rack body 1. You can also. Reference numeral 13b denotes a lever for pulling back the cart type chip pushing member 3 to the rear side.

  In such a configuration, the electrode tip T loaded in the rack body 1 with the tip push-out member 3 moved toward the rear end (12 pieces in the figure) is set on the robot arm or the like. In this case, the electrode tip T is pressed by the tip push-out member 3 and sequentially supplied to the take-out port 6 at the tip, and the electrode tip T is always supplied at the correct position and is accurately mounted on the shank S. Further, when all the electrode tips T are taken out, the setting can be completed immediately only by exchanging with another magazine rack loaded with the electrode tips T, and excellent workability is exhibited.

  As is apparent from the above description, in the magazine rack for chip changer according to the present invention, the guide rod 2 for guiding the chip is disposed inside the cylindrical rack body 1 and the chip T is conveyed in the axial direction in an upright state. In addition to forming the chip transport path 10 to be provided, the chip transport path 10 is provided with the chip push-out member 3 that slides along the guide rod 2 and pushes the chip T to the leading outlet 6. There is no need to cut the groove that matches the tip shape to form a tip transport path as in the past, and it is easy to process and the tip of the R-shaped electrode tip can be accurately transported to a predetermined position in an upright state. In addition, the apparatus can be reduced in size and cost.

It is a top view which shows embodiment of this invention. It is a perspective view which shows embodiment of this invention. It is a front view which shows embodiment of this invention. It is a side view which shows embodiment of this invention. It is a top view which shows a workpiece taking-out mouth cover body. It is a top view which shows other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rack main body 2 Guide rod 3 Chip extrusion member 4 Packing member 5 Work take-out port cover body 6 Take-out port 7a O-ring 7b O-ring 8a Air coupler 8b Air coupler 9 Sensor
10 Chip transfer path
13a Spring S Shank T Electrode tip

Claims (2)

A magazine rack for tip changers that is attached to a tip changer for supplying electrode tips to be used for resistance welding to the shank, and a tip guide is provided in the cylindrical rack body with the tips standing upright. And forming a chip transport path for transporting in the axial direction of the rack body, the guide rod is penetrated in the chip transport path, and an O-ring for maintaining airtightness is mounted in the through hole portion, A tip pushing member that slides along the guide bar and pushes the tip to the take-out port at the tip of the rack body is provided , and the tip pushing member is always moved forward by the air injected from the rear side of the rack body. A magazine rack for a chip changer, characterized in that it is of an air float type urged to do so . The magazine rack for a chip changer according to claim 1, wherein an O-ring that retains airtightness with the inner peripheral surface of the rack body is attached to the chip pushing member .

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