JP4450376B2 - 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 magazine rack in which 5 to 10 electrode chips 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 requires a large space, and there is a problem that the price becomes high. On the other hand, in the latter case, there is a problem that it takes time to align and move the magazine rack to the shank side every time it is exchanged, and it is necessary to frequently perform chip replenishment work because the number of stored electrode chips is small There was a problem. Furthermore, since the electrode tip is moved by the pressing force of a cylinder or a spring set on the rear side, there is a problem that the size is increased, and there is a problem that it is difficult to smoothly push out the tip due to the undulation of the spring. .
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 and smoothly push and supply electrode tips to a shank.

The present invention has been made to solve the above-mentioned problems, and is a magazine rack for a chip changer which is attached to a chip changer for supplying an electrode chip used for resistance welding to a shank, and the chip is placed inside a long columnar rack body. And a chip push-out member that is connected to a spiral spring provided at the tip and is always given a resilient force toward the front side. In a magazine rack for a chip changer in which chips are sequentially pushed out to the take-out port at the tip by this chip push-out member, a pair of guide pins projecting left and right on the side of the chip push-out member are moved back and forth. provided, and characterized in that engage the guide pin in the guide groove provided in the side wall of the chip housing portion Is shall.

  The magazine rack for a chip changer according to the present invention has a chip storage portion for storing a plurality of chips in the longitudinal direction inside a long columnar rack body, and a spiral leaf spring provided at the tip portion in the chip storage portion. The structure is such that the tip push-out member that is always connected to the front and is given a resilient force toward the front side is movably moved back and forth, so that the size of the device can be greatly reduced compared to conventional devices using air cylinders. In addition, the cost can be reduced, and the electrode tip can be accurately and smoothly extruded and supplied to the shank.

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. A front view and FIG. 2 are plan views. 3 is a front view of the upper magazine rack, FIG. 4 is a plan view thereof, FIG. 5 is a front view of the lower magazine rack, and FIG. 6 is a plan view thereof.

In the figure, 1 is a long columnar rack body, 2 is a chip storage section for storing a plurality of chips formed therein in the longitudinal direction, and 3 is a chip provided in the chip storage section 2 for taking out a workpiece at the tip. A chip push-out member for pushing out into the mouth 4.
Reference numeral 21 denotes a mounting plate for setting the rack body 1 to a chip dresser, a chip changer or the like, 22 denotes an eco-raising mechanism for imparting cushioning properties to the rack body 1, T denotes an electrode chip to be supplied, and S denotes this electrode. A shank to which the chip T is attached.

  The tip push-out member 3 is attached to the tip storage portion 2 so as to be movable back and forth, and is connected to a spiral leaf spring 5 provided at the tip portion to which a resilient force is always applied toward the front side. It has become. As the spiral leaf spring 5, for example, it is well known as a mainspring spring or a clock spring. In the present invention, the spiral leaf spring 5 wound and accommodated in the hobbin 6 is freely rotatable around the pin 8 in the box 7 as a rotation axis. It is pivotally attached to.

Further, at least a pair of guide pins 9, 9 project from the side surface of the chip push-out member 3, and the guide pins 9 are engaged with guide grooves 10 provided on the side wall of the chip storage portion 2. Yes. The pair here means that one set is provided on each of the left and right side surfaces, and in the illustrated case, a total of four guide pins comprising one set on the front side and one set on the rear side. 9 protrudes.
As described above, when the front and rear guide pins 9 are slid along the guide groove 10, the chip push-out member 3 can move straight and smoothly without swinging in the guide groove. The rear guide pin 9 protrudes outward from the guide groove 10 so that the advanced tip pushing member 3 can be easily pulled back to the rear end side.

In addition, a shutter mechanism 11 for preventing entry of dust and the like is provided on the upper portion of the upper rack body 1. As shown in FIG. 1, the lid 11b is normally closed by the spring 11a by the bias of the spring 11a, but the shank S pushes the lid 11b open when the chip is taken out. The chip T is taken out.
The shutter mechanism 11 does not need to be attached when the magazine rack is set sideways or downward because there is no entry of dust or the like.

Furthermore, an optical sensor (not shown) for detecting whether or not the electrode tip T has been normally supplied can be provided in the vicinity of the workpiece take-out port 4. As a result, it is possible to effectively prevent occurrence of an electrode tip T replacement error.
3 to 4 show the upper magazine rack, and FIGS. 5 to 6 show the lower magazine rack. Of course, each can be used independently according to the use situation. .

  In what is configured in this way, the one in which the electrode tip T is loaded into the tip storage portion 2 of the rack body 1 with the tip push-out member 3 moved toward the rear end side (12 pieces in the figure), If set with a tip changer or the like, the electrode tip T is pressed by the tip pushing member 3 urged forward by the elastic force of the spiral spring 5 and is sequentially and accurately supplied smoothly to the leading outlet 4. The electrode tip T is always supplied at the correct position and is accurately attached to 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. Moreover, unlike the conventional method in which the electrode tip T is moved by the pressing force of a cylinder or a spring set on the rear side, the spiral tip spring 5 is used to pull the electrode tip T from the front side. Therefore, it is possible to realize a reduction in size and cost.

  As apparent from the above description, in the magazine rack for chip changer according to the present invention, the chip storage portion 2 for storing a plurality of chips T in the longitudinal direction is formed inside the long columnar rack body 1, and the chip A tip push-out member 3 connected to a spiral leaf spring 5 provided at the distal end and provided with a resilient force that always moves forward is provided in the storage portion 2 so as to be movable back and forth. Since T is sequentially pushed out to the take-out port 4 at the tip, it becomes possible to push and feed the electrode tip accurately and smoothly to a predetermined position, and compared with the push-feed type from the rear side by a conventional air cylinder or the like. Thus, the device can be greatly reduced in size and cost.

It is a front view which shows embodiment of this invention. It is a top view of FIG. It is a front view which shows an upper magazine rack. FIG. 4 is a plan view of FIG. 3. It is a front view which shows a lower magazine rack. FIG. 6 is a plan view of FIG. 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rack main body 2 Chip storage part 3 Chip pushing member 4 Chip extraction port 5 Spiral leaf spring 6 Hobbin 9 Guide pin 10 Guide groove 11 Shutter mechanism S Shank T Electrode chip

Claims (1)

This is a magazine rack for chip changers that is attached to a chip changer for supplying electrode chips used for resistance welding to the shank, and a chip storage part is formed inside the long columnar rack body to store multiple chips in the longitudinal direction. At the same time, a chip push-out member, which is connected to a spiral spring provided at the tip and is always given a resilient force toward the front side, is provided in the chip storage part so as to be movable back and forth. In the magazine rack for chip changer , which is pushed out sequentially to the take-out port at the tip, a pair of guide pins projecting left and right on the side of the chip push-out member are provided at the front and back, and this guide pin is provided on the side wall of the chip storage portion A magazine rack for a chip changer, wherein the magazine rack is engaged with a guide groove formed .

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