JP2008296534A - Switch for detecting return of ejector plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a switch for confirming the return of an ejector plate which can mount a detection part in an optimal position from the outside, and can also adjust a detection state. <P>SOLUTION: This switch 1 for confirming the return of the ejector plate is composed of a microswitch-housing block 10 housing a microswitch 11 and having a face positioning in contact with a spacer block 102 or an attachment plate; an extension arm composed of an arm body extending from the microswitch-housing block to a mounting groove formed at the spacer block or the attachment plate and an extension arm for protection extending to a predetermined position of the ejector plate along the arm body; a rotary shaft rod extending along the extension arm; a detection part erecting at a predetermined angle from one end of the rotary shaft rod; and an actuation part composed of a rotary body rotating accompanied by the rotation of the rotary shaft rod, the other end of which is fixed, and pressing a push switch of the microswitch. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an ejector plate return detection switch for detecting a return position of an eject plate of an injection molding machine.

  Conventionally, according to the characteristics of the molded product (thin, deep, etc.), the position detector value is visually read and recorded for the switching position of the low speed range and high speed range while actually ejecting the molded product at low speed. However, it was common to manually enter keys on the setting device. For this reason, in Patent Document 1, in the injection molding machine, an operation is performed from the origin position, and in particular, the n-th signal or the m-th signal reaching an arbitrary position is transmitted, and a movable member such as an ejector plate at the time of receiving each signal. Is detected by a position detector and automatically read by a computing unit, and the nth position read value or mth position read value corresponding to the nth signal or mth signal is sequentially stored in the storage unit. A method of storing as a pair of position reading values or a pair of m-th signal and m-th position reading value and converting as a control position set value by a converter is disclosed.

  In addition, the molded product is a cylinder rod of the eject cylinder on the moving die plate in the molding machine such as an injection molding machine or a die casting machine in which the eject cylinder is operated after the mold is opened and the molded product is ejected from the female mold by the ejector pin. The position detection device for detecting the forward limit and the reverse limit of the position is mounted, but the position detection device is damaged by the shock vibration at the time of the return of the compression spring that returns the eject pin to the mounting device of this position detection device. There was a bug to do. For this reason, in patent document 2, it is comprised with the bracket which mounts the position detection apparatus of an eject mechanism, the bracket mounting pin which mounts a bracket to a movement die plate, and the elastic body interposed between a bracket and a bracket mounting pin. An attachment device is provided, and the impact vibration caused by the compression spring is effectively damped by the elastic body interposed between the bracket and the bracket attachment pin so as not to be transmitted to the position detection device.

Further, Patent Document 3 discloses, as one of the prior arts, a method in which when a movable mold is opened to a predetermined position, a limit switch detects this, and an operation of the ejector device is started by this detection signal. In contrast to this prior art, the invention disclosed in Patent Document 3 calculates the timing for starting the ejecting operation of the ejector device based on the current position and moving speed of the moving body, and calculates the time based on the calculated value. The ejector device starts an ejecting operation, and includes position detecting means, speed detecting means, and calculating means.
JP-A-5-269814 JP-A-7-304074 JP-A-10-225966

  As is apparent from Patent Documents 1 to 3, it is necessary to accurately detect the forward or backward limit position of the ejector pin or the ejector plate to which the ejector pin is attached. In addition, this is necessary for stopping the backward movement of the ejector plate and starting the forward movement, and as disclosed in the above-mentioned patent document, there are also those adapted to software, Since calibration is necessary when the mold shapes differ, it is still effective in terms of cost and workability to provide a limiter switch that detects that the ejector plate has been retracted to a predetermined position. .

  However, providing a limit switch near the optimal position between the mounting plate to which the template is attached and the ejector plate, for example, near the center of the ejector plate requires a special mounting structure, There is a problem that maintenance at the time of failure is difficult. In addition, when the ejector plate is provided at a position where it can be easily detected, for example, at the side, there is a problem that proper detection cannot be performed due to factors such as the inclination of the ejector plate.

  For this reason, this invention is providing the return confirmation switch of the ejector plate which can attach a detection part to the optimal position from the outside, and can adjust a detection state.

  Therefore, the ejector plate return confirmation switch according to the present invention includes a template, a mounting plate to which the template is attached via a spacer block, and an ejector plate to which a pin plate is attached and which moves forward and backward with respect to the mounting plate. In at least an injection molding machine, a microswitch is accommodated and has a surface that can be positioned by contact with the spacer block or the mounting plate, and from the microswitch storage block, the spacer block or An extension arm portion constituted by an arm main body portion extending in a mounting groove formed on the mounting plate and a protective extension portion extending along the arm main body portion to a predetermined position of the ejector plate; A rotating shaft rod extending along the extending arm portion, from one end of the rotating shaft rod At least configured by a detection unit that rises at a fixed angle, and an operation unit that is configured by a rotating body that is fixed with the other end of the rotating rod, rotates with the rotation of the rotating rod, and pushes the push switch of the microswitch It is to be done. Furthermore, the microswitch storage block has a positioning surface for the spacer block and a positioning surface for the mounting plate. Furthermore, positioning can also be performed by abutting the tip of the protective extension portion against a predetermined location.

  Moreover, it is desirable to have a sensitivity adjustment mechanism for adjusting the position of the microswitch with respect to the rotating body. Specifically, by rotating an adjustment knob provided on the microswitch storage block, the moving plate on which the microswitch is fixed can be moved relative to the rotating body, and the sensing range of the switch can be adjusted. Is.

  Furthermore, it is preferable that the arm main body is provided with a fixing mechanism for fixing the arm main body to the spacer block or the mounting plate. In addition, the fixing mechanism has a groove formed along the arm main body portion and formed with a predetermined inclination at the tip, and an inclination that is housed in the groove and matches the predetermined inclination at the tip. It is preferable that the fixing bar is configured to move along the groove portion by turning a pressure contact knob provided in the microswitch housing block and to be lifted along the inclination when the microswitch housing block moves forward.

  According to the present invention, the ejector plate return confirmation switch can be attached to and detached from the ejector plate, and the detection section can be extended to the optimum position of the ejector plate. In addition, the detection sensitivity can be adjusted from the outside, and maintenance is easy. In addition, there is an advantage that replacement in the event of a failure is easy and the interruption of work can be shortened.

  Embodiments of the present invention will be described below with reference to the drawings.

  The ejector plate return confirmation switch 1 according to the embodiment of the present invention includes a mold plate 101, a mounting plate 103 for mounting the template plate 101 via a spacer block 102, and a pin plate 104. On the other hand, it is mounted on an injection molding machine 100 having at least an ejector plate 105 that moves forward and backward. Reference numeral 106 denotes a current position for limiting the final position when the ejector plate 105 is returned.

  The ejector plate return confirmation switch 1 is, for example, as shown in FIGS. 1 to 3, and includes a surface 12, 13 in which a microswitch 11 is accommodated and contacts the spacer block 102 or the mounting plate 103 for positioning. A microswitch housing block 10 having an arm body portion 21 extending from the microswitch housing block 10 to a mounting groove 107 formed in the spacer block 102 or the mounting plate 103, and the arm body portion 21. An extension arm portion 20 constituted by a protective extension portion 22 extending to a predetermined position of the ejector plate 105, a rotary shaft rod 31 extending along the extension arm portion 20, and the rotary shaft rod The detection unit 32 rising from one end of the switch 31 at a predetermined angle, and the other end of the rotating rod 31 Fixed to rotate with the rotation of the rotating rod 31, at least constituted by a configured operating unit 30 by the rotation member 33 to press the push switch 14 of the microswitch 11. Further, the front end 28 of the protective extension 22 can be positioned by abutting against the opposite spacer block. In this embodiment, a micro switch is used as a switch, but other types of switches can also be used.

  The microswitch storage block 10 has a sensitivity adjustment mechanism for adjusting the position of the microswitch 11 with respect to the rotating body 33. As shown in FIG. 5, this sensitivity adjustment mechanism rotates the adjustment knob 15 provided in the microswitch storage block 10 to move the moving plate 16 to which the microswitch 11 is fixed with respect to the rotating body 33. The sensitivity of the microswitch 11 increases when the microswitch 11 approaches the rotating body 33, and the sensitivity of the microswitch 11 decreases when the microswitch 11 moves away. The moving plate 16 moves along the guide portion 17.

  The arm main body 21 is provided with a fixing mechanism that fixes the arm main body 21 to the spacer block 102 or the mounting plate 103. This fixing mechanism is, for example, as shown in FIG. 4, and is formed along the arm main body 21 and has a groove 24 with a predetermined slope 23 formed at the tip thereof. It has an inclination 25 that matches a predetermined inclination 23, and moves along the groove 24 by turning a pressure contact knob 26 provided on the microswitch storage block 10, and moves along the inclination 23 when moving forward. And a fixing bar 27 to be lifted.

  Thus, the ejector plate return confirmation switch 1 is attached to the mounting plate 103 so that the arm main body 21 is inserted into the mounting groove 107 formed in the spacer block 102 or the mounting plate 103, and is used for pressure contact. The knob 26 is turned in a predetermined direction to extend the fixing bar 27. As a result, the fixing bar 27 moves along the groove 24, the tip rises along the slope 23, and presses the upper side surface of the mounting groove 107 to fix the ejector plate return confirmation switch 1 to the mounting groove 107. To do.

  When the ejector plate return confirmation switch 1 is mounted, the detection unit 32 is disposed at a predetermined position of the ejector plate 105. When the ejector plate 105 moves downward by the return operation, the detection unit 32 is pushed down, so that the rotating rod 31 rotates, the rotating body 33 rotates, and the push switch 14 of the micro switch 11 is pressed. Thus, the microswitch 11 is turned ON, and the return of the ejector plate is detected.

It is explanatory drawing which showed the state which mounted | wore with the ejector plate return confirmation switch which concerns on this invention. It is a side view of the ejector plate return confirmation switch according to the present invention. It is a top view of the ejector plate return confirmation switch which concerns on this invention. It is explanatory drawing of a fixing mechanism. It is explanatory drawing of a sensitivity adjustment mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ejector plate return confirmation switch 10 Micro switch storage block 11 Micro switch 14 Push switch 16 Moving plate 17 Guide part 20 Extension arm part 21 Arm main part 23 Inclination 24 Groove part 25 Inclination 26 Pressure contact knob 27 Fixing bar 30 Actuating part 31 Rotating shaft rod 32 Detecting unit 33 Rotating body 100 Injection molding machine 101 Mold plate 102 Spacer block 103 Mounting plate 104 Pin plate 105 Ejector plate 106 Seat 107 Mounting groove

Claims (4)

In an injection molding machine comprising at least a template, a mounting plate for mounting the template via a spacer block, and an ejector plate to which a pin plate is attached and which moves forward and backward with respect to the mounting plate,
A microswitch housing block having a surface in which a microswitch is housed and having a surface that can be positioned in contact with the spacer block or the mounting plate;
An arm main body extending from the micro switch housing block to a mounting groove formed in the spacer block or the mounting plate, and a protective extension extending to a predetermined position of the ejector plate along the arm main body An extending arm part constituted by parts,
A rotating shaft rod extending along the extending arm portion, a detecting portion rising from one end of the rotating shaft rod at a predetermined angle, and the other end of the rotating rod are fixed, and rotate as the rotating rod rotates. And an ejector plate return confirmation switch comprising at least an actuating portion constituted by a rotating body that pushes a push switch of the microswitch.   The ejector plate return confirmation switch according to claim 1, further comprising a sensitivity adjustment mechanism for adjusting a position of the micro switch with respect to the rotating body.   The ejector plate return confirmation switch according to claim 1 or 2, wherein the arm body part is provided with a fixing mechanism that fixes the arm body part to the spacer block or the mounting plate.   The fixing mechanism includes a groove formed along the arm main body and having a predetermined inclination at a tip, and an inclination that is accommodated in the groove and matches the predetermined inclination at the tip. It is constituted by a fixing bar that moves along the groove portion by turning a pressure contact knob provided on the switch storage block and lifts along the inclination when moving toward the inclination. The ejector plate return confirmation switch according to claim 3.

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