JP2019069588A - Accommodation device and ejector pin with sensor - Google Patents

Abstract

To provide an easy-to-use accommodation device excellent in maintainability.SOLUTION: An accommodation device is provided with: a force sensor S1 arranged in opposite to a back end part 53 provided in a position back of a front end surface 51a of an ejector pin 50 and coming into indirect contact with the back end part 53; an accommodation cover 20 accommodating the back end part 53 of the ejector pin 50 and the force sensor S1 inside and formed with an insertion hole 43 through which the back end part 53 of the ejector pin 50 is inserted inside; and a detachable mechanism 44 provided in the insertion hole 43 of the accommodation cover 20 and for detachably fitting the back end part 53 of the ejector pin 50 and the accommodation cover 20 together.SELECTED DRAWING: Figure 2

Description

  The present invention relates to, for example, a housing device and a sensor-equipped ejector pin used in a pressure detection device that detects the internal pressure of a cavity in a mold of an injection molding machine using a force sensor.

  Conventionally, in a pressure detection device of an injection molding machine, a fixed mold supported by a fixed platen of a mold clamping device and a movable mold supported by a movable platen of the mold clamping device The internal pressure of the cavity formed by the mold is detected by a force sensor attached to the rear end of the ejector pin of the movable mold.

  As such an ejector pin, for example, a cylindrical flange provided at the rear end of the ejector pin is accommodated in a housing that accommodates a force sensor, so that a sensor with the force sensor and the ejector pin integrated is integrated. Ejector pins are known.

  In such a sensor-equipped ejector pin, when a pressure corresponding to the internal pressure of the cavity is applied to the front end of the ejector pin, the flange portion abuts against the force sensor to measure the internal pressure (for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 10-76554

  However, since the ejector pin with a sensor of Patent Document 1 is integrated in a state in which the ejector pin and the force sensor can not be detached, for example, even if it is desired to use ejector pins having different diameters and shapes, the force sensor You can not replace only the ejector pin separately. Also, for example, when either the ejector pin or the force sensor is broken, the ejector pin with sensor itself must be replaced although there is no abnormality in the force sensor or the ejector pin.

  Thus, for the conventional ejector pin with a sensor, improvement in maintainability has been required, such as replacing only the ejector pin or the force sensor separately.

  This invention is made in view of the above-mentioned subject, The objective is to provide the easy-to-use storage apparatus excellent in maintainability, and the ejector pin with a sensor.

  In order to achieve the above object, the storage device according to the present invention is disposed to face a rear end portion provided at a position facing the front end face of the ejector pin, and indirectly with the rear end portion. A force sensor to be in contact, a housing cover in which a rear end portion of the ejector pin and the force sensor are housed, and an insertion hole for inserting the rear end portion of the ejector pin into the inside is formed; It is characterized in that it comprises: an attaching / detaching mechanism provided in the insertion hole and detachably attaching a rear end portion of the ejector pin and the housing cover.

  In the storage device according to one aspect of the present invention, a male screw portion is provided at a rear end portion of the ejector pin, and the attaching / detaching mechanism portion is a female screw portion provided in an insertion hole of the housing cover. It is characterized by

  In the storage device according to one aspect of the present invention, the rear end portion of the ejector pin is provided with a protruding portion that protrudes from the center side of the rear end portion toward the inner surface side of the storage cover The mechanism portion is characterized in that it is an insertion groove formed at a position corresponding to the protruding portion.

  In the storage device according to one aspect of the present invention, the ejector pin extends toward the inner surface of the storage cover as it extends from the rear end to the front end, and the ejector extends from the rear end. A barb portion which can be deformed by elastic deformation is provided on the center side of the pin, and the attaching / detaching mechanism portion is a through hole whose diameter of the through hole is smaller than the maximum width of the barb portion. And an opening is formed at a position corresponding to the barb portion.

  In the storage device according to one aspect of the present invention, the rear end portion of the ejector pin is provided with a ball biased so that a portion thereof protrudes from the rear end portion, and the mounting and demounting mechanism portion It is a ball accommodating portion provided at a position corresponding to the ball of the insertion hole of the accommodation cover.

  In order to achieve the above object, the storage device according to the present invention is disposed to face a rear end portion provided at a position facing the front end face of the ejector pin, and indirectly with the rear end portion. A force sensor in contact, a rear end portion of the ejector pin and a housing cover for housing the force sensor therein, and the housing cover provided for detachably mounting the rear end portion of the ejector pin and the housing cover And an attaching / detaching mechanism portion.

  In the storage device according to one aspect of the present invention, the rear end portion of the ejector pin has a head that is larger in diameter than the rod portion of the ejector pin, and the attaching / detaching mechanism portion is the head It can be slidably accommodated inside the accommodation cover, and it is formed in the notch part which was notched partially toward the center side from the outer peripheral side of the accommodation cover, and the notch part which locks the head. And a flange portion.

  In the storage device according to one aspect of the present invention, a ring-shaped member is inserted into a gap between the head and the flange portion.

  In the storage device according to one aspect of the present invention, the storage cover has a pin storage body for storing the rear end portion of the ejector pin, and a pin guide portion in which an insertion hole for inserting the ejector pin is formed. The mounting and dismounting mechanism is formed on a screw formed on the inner peripheral surface of the pin housing and on an outer peripheral surface of the pin guide, and can be screwed with the screw on the pin housing. And a screw portion of the pin guide portion.

  In the housing device according to one aspect of the present invention, the housing cover includes a sensor housing for housing the force sensor, and a pin housing for supporting the ejector pin, wherein the pin housing is It has the disk part in which the insertion hole which inserts an ejector pin is formed, and the cylindrical part standingly arranged from the outer periphery of the disk part, and the attachment and detachment mechanism part is formed in the outer peripheral surface of the sensor container. And the threaded portion of the pin housing that can be screwed onto the threaded portion of the sensor housing formed on the inner peripheral surface of the cylindrical portion of the pin housing. It is characterized by

  In the storage device according to one aspect of the present invention, the storage cover is movable in the axial direction in a state of being stored in a rectangular column-shaped storage hole inside the storage cover, and the rear end portion of the ejector pin is inserted It has a prismatic prismatic guide portion corresponding to the accommodation hole in which the insertion hole to be formed is formed, and a male screw portion is provided on the outer peripheral surface of the rear end portion at the rear end portion of the ejector pin. The attaching and detaching mechanism portion is a female screw portion provided in the insertion hole of the prismatic guide portion.

  In order to achieve the above object, an ejector pin with a sensor according to the present invention comprises: an ejector pin for pushing out a molded product formed according to the shape of a cavity in a mold of an injection molding machine by a front end face; A force sensor disposed opposite to the rear end provided at a position opposite to the front end face of the ejector pin and indirectly contacting the rear end, the rear end of the ejector pin, and the force sensor A storage cover in which a force sensor is housed inside, and a housing cover formed with an insertion hole for inserting the rear end of the ejector pin into the inside, and an attaching / detaching mechanism for detachably attaching the rear end of the ejector pin and the housing cover A mounting / removal portion, and the mounting / dismounting mechanism portion is provided in a first mounting / dismounting mechanism portion provided at a rear end portion of the ejector pin, and the insertion hole of the housing cover Characterized in that it comprises a second detachment mechanism section which.

  In the ejector pin with a sensor according to one aspect of the present invention, the first attaching / detaching mechanism part is an external thread part provided at a rear end part of the ejector pin, and the second attaching / detaching mechanism part is insertion of the accommodation cover It is characterized in that it is an internal thread portion provided in the hole.

  In the ejector pin with a sensor according to one aspect of the present invention, the first attaching / detaching mechanism portion is a projecting portion that protrudes from the center side of the rear end portion of the ejector pin toward the inner surface side of the accommodation cover The second attachment / detachment mechanism portion is an insertion groove formed at a position corresponding to the projecting portion.

  In the ejector pin with a sensor according to one aspect of the present invention, the first attachment / detachment mechanism parts spread and extend toward the inner surface of the housing cover as they extend from the rear end to the front end of the ejector pin. The barb portion is elastically deformable on the center side of the ejector pin, and the second attaching / detaching mechanism portion is a through hole whose diameter of the through hole is smaller than the maximum width of the barb portion, the housing cover An opening is formed at a position corresponding to the barb portion.

  In the sensor-equipped ejector pin according to one aspect of the present invention, the first mounting and demounting mechanism portion is a ball biased so that a portion thereof protrudes from the rear end portion of the ejector pin, and the second mounting and demounting mechanism portion A ball housing portion is provided at a position corresponding to the ball of the insertion hole of the housing cover.

  In order to achieve the above object, an ejector pin with a sensor according to the present invention comprises: an ejector pin for pushing out a molded product formed according to the shape of a cavity in a mold of an injection molding machine by a front end face; A force sensor disposed opposite to a rear end provided at a position facing the front end face of the pin and indirectly contacting the rear end, a rear end of the ejector pin, and the force sensor And an attaching / detaching mechanism for detachably attaching the rear end of the ejector pin and the receiving cover, wherein the attaching / detaching mechanism is the rear end of the ejector pin or the ejector pin. And a second attaching / detaching mechanism provided at the receiving cover, and a second attaching / detaching mechanism provided at the receiving cover. The features.

  In the ejector pin with a sensor according to one aspect of the present invention, the first attaching / detaching mechanism portion has a head whose diameter is larger than a rod portion of the ejector pin provided at a rear end portion of the ejector pin. The second attaching / detaching mechanism portion is capable of slidably housing the head inside the housing cover, and a cutout portion partially cut out from the outer peripheral side to the center side of the housing cover; And a flange formed at the notch for locking the head.

  The ejector pin with a sensor which concerns on 1 aspect of this invention WHEREIN: The ring-shaped member is inserted in the clearance gap between the said head and the said flange part, It is characterized by the above-mentioned.

  In the ejector pin with a sensor according to one aspect of the present invention, the housing cover includes a pin housing body for housing the rear end portion of the ejector pin and a pin guide portion in which an insertion hole for inserting the ejector pin is formed. The first mounting and demounting mechanism portion is a screw portion of the pin housing formed on the inner peripheral surface of the pin housing, and the second mounting and demounting mechanism portion is the outer peripheral surface of the pin guide portion And a threaded portion of the pin guide portion which can be screwed with the threaded portion of the pin housing.

  In the sensor-equipped ejector pin according to one aspect of the present invention, the housing cover includes a sensor housing for housing the force sensor, and a pin housing for supporting the ejector pin, and the pin housing is A disc portion provided with an insertion hole through which the ejector pin is inserted, and a cylindrical portion erected from an outer peripheral edge of the disc portion; The screw portion of the sensor housing formed on the outer peripheral surface, and the second attaching / detaching mechanism portion is screwed to the screw portion of the sensor housing formed on the inner peripheral surface of the cylindrical portion of the pin housing. It is characterized in that it is a thread portion of the compatible cylindrical portion.

  In the sensor-equipped ejector pin according to one aspect of the present invention, the housing cover is axially movable in a state of being housed in a prismatic housing hole inside the housing cover, and a rear end portion of the ejector pin And the first mounting / removing mechanism portion is an external thread provided on the outer peripheral surface of the rear end portion of the ejector pin. The second attachment / detachment mechanism portion is a female screw portion provided in the insertion hole of the prismatic guide portion.

  The ejector pin with a sensor which concerns on 1 aspect of this invention WHEREIN: The part which contacts the said force sensor in the rear end part of the said ejector pin indirectly is characterized by the protrusion in which the front end has a roundness.

  ADVANTAGE OF THE INVENTION According to this invention, the easy-to-use storage apparatus excellent in maintainability and the ejector pin with a sensor can be provided.

Fig.1 (a) is sectional drawing which shows the structure of the metal mold | die used for the injection molding machine which concerns on the 1st Embodiment of this invention, FIG.1 (b) is the partial expansion of the ejector plate in a metal mold | die. FIG. FIG. 2 (a) is a cross-sectional view schematically showing the configuration of a sensor-equipped ejector pin according to a first embodiment of the present invention, and FIG. 2 (b) is a first embodiment of the present invention It is an arrow view which shows roughly the structure at the time of seeing the accommodation cover of the ejector pin with a sensor which concerns on (a) from the A direction in FIG. 2 (a). It is explanatory drawing which shows roughly the attachment method of the ejector pin in the ejector pin with a sensor which concerns on the 1st Embodiment of this invention, and the removal method. FIG. 4 (a) is a cross sectional view schematically showing a configuration of a sensor-equipped ejector pin according to a second embodiment of the present invention, and FIG. 4 (b) is a second embodiment of the present invention. It is an arrow view which shows roughly the structure at the time of seeing the accommodation cover of the ejector pin with a sensor which concerns on (a) from FIG. 4 (a) from A direction. FIG. 5 (a) is a cross-sectional view schematically showing a configuration of a sensor-equipped ejector pin according to a third embodiment of the present invention, and FIG. 5 (b) is a third embodiment of the present invention. FIG. 6 is an arrow view schematically showing a configuration of the housing cover of the sensor-equipped ejector pin according to FIG. 5 as viewed from the direction A in FIG. FIG. 6 (a) is a cross-sectional view schematically showing a configuration of a sensor-equipped ejector pin according to a fourth embodiment of the present invention, and FIG. 6 (b) is a fourth embodiment of the present invention It is an arrow view which shows roughly the structure at the time of seeing the accommodation cover of the ejector pin with a sensor which concerns on (a) from FIG. 6A direction. It is sectional drawing which shows roughly the structure in the modification of the ejector pin with a sensor which concerns on the 1st Embodiment of this invention. It is sectional drawing which shows roughly the structure in the modification of the ejector pin with a sensor which concerns on the 2nd Embodiment of this invention. It is sectional drawing which shows roughly the structure in the modification of the ejector pin with a sensor which concerns on the 3rd Embodiment of this invention. It is sectional drawing which shows roughly the structure in the modification of the ejector pin with a sensor which concerns on the 4th Embodiment of this invention. It is sectional drawing which shows roughly the structure in the modification of the ejector pin with a sensor which concerns on the 1st Embodiment of this invention. It is sectional drawing which shows roughly the structure in the modification of the ejector pin with a sensor which concerns on the 1st Embodiment of this invention. It is a perspective view which shows roughly the structure of the ejector pin with a sensor which concerns on the 5th Embodiment of this invention. It is sectional drawing and a top view which show roughly the cross-sectional structure and upper surface structure of the ejector pin with a sensor which concerns on the 5th Embodiment of this invention. It is a perspective view where it uses for description of the attachment method at the time of attaching the ejector pin of the ejector pin with a sensor which concerns on the 5th Embodiment of this invention to a storage cover. It is a perspective view which shows roughly the structure of the ejector pin with a sensor which concerns on the 6th Embodiment of this invention. It is a sectional view showing the composition of the ejector pin with a sensor concerning a 6th embodiment of the present invention. It is a perspective view which shows roughly the structure of the ejector pin with a sensor which concerns on the 7th Embodiment of this invention. It is sectional drawing and a top view which show roughly the cross-sectional structure and upper surface structure of the ejector pin with a sensor which concerns on the 7th Embodiment of this invention. It is a perspective view where it uses for description of the attachment method at the time of attaching the ejector pin of the sensor-equipped ejector pin which concerns on the 7th Embodiment of this invention to a storage cover. It is a perspective view which shows roughly the structure of the ejector pin with a sensor which concerns on the 8th Embodiment of this invention. It is sectional drawing which shows roughly the cross-sectional structure of the ejector pin with a sensor which concerns on the 8th Embodiment of this invention. FIG. 21 is a perspective view for describing a mounting method when mounting the ejector pins of the sensor-equipped ejector pin according to the eighth embodiment of the present invention to the housing cover. It is a perspective view showing roughly the composition of the ejector pin with a sensor concerning a 9th embodiment of the present invention. It is sectional drawing and top view which show roughly the cross-sectional structure and upper surface structure of the ejector pin with a sensor which concerns on the 9th Embodiment of this invention. FIG. 21 is a perspective view for describing a method of attaching an ejector pin with a sensor according to a ninth embodiment of the present invention to the housing cover when attaching the ejector pin to a housing cover.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiment of the present invention will be described separately for the first to ninth embodiments.

First Embodiment
FIG. 1 (a) is a cross-sectional view showing a configuration of a mold 1 used in an injection molding machine according to a first embodiment of the present invention, and FIG. 1 (b) is an ejector plate 7 in the mold 1. FIG. Hereinafter, for convenience of explanation, the direction of arrow ab in FIG. 1 is the height direction, the direction of arrow a is the upper side, and the direction of arrow b is the lower side. Further, the direction of the arrow cd (the direction perpendicular to the paper surface) is taken as the width direction, the direction of the arrow c is taken as the near side, and the direction as the arrow d is taken as the back side. Furthermore, the direction of the arrow ef is the direction of the axis X1, the direction of the arrow e is the left, and the direction of the arrow f is the right.

  As shown in FIG. 1A, the mold 1 includes a fixed side mounting plate 2, a fixed side mold 3, a movable side mounting plate 4, a spacer block 5, a movable side mold 6, and an ejector plate. 7, an ejector rod 8, and a return pin 9. In the mold 1, the fixed side mold 3 is attached to the fixed side mounting plate 2, and the movable side mold 6 is attached to the movable side mounting plate 4 via the spacer block 5.

  The fixed side mold 3 is formed with a curved recess 3 a for forming a cavity CT with the movable side mold 6, and a guide hole 3 b is also formed. The movable side mold 6 is formed with a convex portion 6 a for forming a cavity CT with the fixed side mold 3, and a guide pin at a position facing the guide hole 3 b of the fixed side mold 3. 6b is provided.

  Further, at a position which is a central portion of the movable side mold 6 and a center of the cavity CT, the sensor-mounted ejector pin 10 penetrates the center of the convex portion 6a in the direction of the axis X1 (direction of arrow ef). It is movably supported. The sensor-mounted ejector pin 10 includes a housing cover 20 as a housing device for housing the detection element S1 as a force sensor and an ejector pin 50.

  The ejector plate 8 is pushed by the ejector rod 8 with the ejector pin 50 in contact with the molded article P molded corresponding to the shape of the cavity CT and the front end face on the right side (arrow f direction) of the axis X1 direction. It is a rod-like member which removes the said molded article P by this. The housing cover 20 is detachably attached to the ejector plate 7.

  More specifically, the ejector plate 7 has the die side ejector plate 7a and the ejector rod side ejector plate 7b, as shown in FIG. 1 (b).

  Further, a housing cover mounting hole 7c and an ejector pin insertion hole 7d are formed in the mold side ejector plate 7a. The housing cover mounting hole 7c is a central portion of the movable mold 6, and a cylindrical shape with a bottom from the left side (arrow e direction) to the right side (arrow f direction) at a position that is the center of the cavity CT. Or it is a concave part which has a predetermined depth of bottomed substantially cylindrical shape. The ejector pin insertion hole 7d is a central portion of the movable side mold 6 and is a center of the cavity CT from the accommodation cover mounting hole 7c toward the right side (arrow f direction). , And has a diameter larger than that of the ejector pin 50 and a diameter smaller than that of the housing cover mounting hole 7c. The axial center of the ejector pin insertion hole 7d and the axial center of the accommodation cover mounting hole 7c coincide with each other in the direction of the axis X1. However, the present invention is not limited to this, and the axis centers may not be coincident with each other.

  The housing cover 20 is detachably attached to the housing cover mounting hole 7c of the die side ejector plate 7a, and the ejector pin 50 protrudes to the right (in the direction of the arrow f) through the ejector pin insertion hole 7d. The housing cover 20 is flush with the surface 7aL on the left side (direction of arrow e) of the mold side ejector plate 7a on the left side (direction of arrow e), and on the right side (direction of arrow f) of the mold side ejector plate 7a. It is not flush with the surface 7aR on the right side (the direction of the arrow f), but is disposed on the left side (direction of the arrow e) with respect to the surface 7aR. As described above, since the mold 1 is detachable, maintenance is easy, and the housing cover mounting hole 7c may be formed only in the mold side ejector plate 7a. Cost, time, and labor can be reduced. However, the present invention is not limited to this, and the sensor-mounted ejector pin 10 is supported movably in the direction of the axis X1 (the direction of the arrow ef) in a state of penetrating the fixed mold 3 at a position coaxial with the axis X1. The installation position is not limited.

  A plurality of cavities CT are formed between the fixed side mold 3 and the movable side mold 6 in the mold 1, and the accommodation cover 20 of the sensor-equipped ejector pin 10 corresponding to each cavity CT is also formed. Each of the detection elements S2 to Sn is accommodated. That is, detection elements S1 to Sn are provided corresponding to the respective cavities CT.

  Here, for example, a strain gauge is used as the detection elements S1 to Sn, and the internal pressure of the cavity CT acts on the detection elements S1 to Sn through the ejector pin 50 of the ejector pin with sensor 10. As a result, the detection elements S1 to Sn can detect the internal pressure of the cavity CT (in this case, the filling pressure of the molten material to be filled in the cavity CT by the injection unit not shown, the projection pressure at the time of extrusion of the molded product, etc.).

  As shown in FIG. 1A, the ejector rod 8 is attached to the ejector plate 7 on the side opposite to the ejector pin 50, and the return pin 9 is on the same side as the ejector pin 50 and parallel to the ejector pin 50. Is attached. The ejector rod 8 is attached to the ejector plate 7 so as to be movable in the direction of the axis X1 (the direction of the arrow ef) while penetrating the movable side mounting plate 4. The return pin 9 is provided with a spring (not shown) for returning the ejector plate 7 to its original position.

  Fig.2 (a) is sectional drawing which shows roughly the structure of the ejector pin 10 with a sensor which concerns on the 1st Embodiment of this invention, FIG.2 (b) is the accommodation cover of the ejector pin 10 with a sensor It is an arrow directional view roughly shown about the structure at the time of seeing 20 from FIG. 2 (a) from A direction. As shown in FIG. 2, the sensor-equipped ejector pin 10 is provided with a housing cover 20 which has a hollow cylindrical shape or a substantially cylindrical shape as a whole, and an ejector pin 50 detachably attached to the housing cover 20. . However, the present invention is not limited to this, and the accommodation cover 20 may have a quadrangular prism shape, and the appearance shape is not limited.

  The housing cover 20 is provided with a sensor housing space 21 which is a space for housing the detection element S1, and a rear end housing space 22 which is a space for housing a pin rear end portion 53 (described later) of the ejector pin 50. ing. Further, the housing cover 20 includes the sensor housing 30 and the pin housing 40, and is connected to each other in the direction of the axis X1 (the direction of the arrow ef). The sensor housing 30 and the pin housing 40 may be connected by adhesion or may be connected by fitting.

  The sensor housing 30 and the pin housing 40 are made of, for example, metal or the like. However, the present invention is not limited to this, and may be resin or the like. The sensor housing 30 and the pin housing 40 have the same or substantially the same diameter, and have the same or substantially the same length in the direction of the axis X1. However, the diameter is not limited to this, and different diameters and lengths may be used. The axial center of the sensor housing 30 and the axial center of the pin housing 40 coincide with each other in the direction of the axis X1. However, the present invention is not limited to this, and the axis centers may not be coincident with each other.

  The sensor container 30 is formed in a hollow cylindrical or substantially cylindrical shape as a whole, and has a pair of disc-shaped or substantially disc-shaped disc portions 31 and 32 opposed in the direction of the axis X1 (the direction of the arrow ef) And a cylindrical portion 33 having a cylindrical or substantially cylindrical shape formed between the disc portions 31 and 32 of FIG. In the sensor housing 30, the pair of disc portions 31, 32 and the cylindrical portion 33 are integrally formed.

  The disk portion 31 has an outer surface (hereinafter, also referred to as an "outside end surface") 31a opposed to the pin rear end portion 53 of the ejector pin 50 in the axial line X1 direction (arrow ef direction) and the outer end surface 31a. It has a face 31b facing the inside and forming the sensor accommodation space 21 (hereinafter, this is also referred to as an "inside end surface"). A detection element S1 is attached to the inner end surface 31b of the disc portion 31 so as to cover substantially the entire surface.

  Further, in the cylindrical portion 33, a wiring hole 34 for taking out the wiring S1a of the detection element S1 is formed. Incidentally, the disc portion 31 of the sensor housing 30 is a straining body interposed between the pin rear end portion 53 of the ejector pin 50 and the detection element S1, and the pin rear end portion 53 of the ejector pin 50 detects It functions as a pressed plate for indirectly pressing the element S1.

  The pin housing body 40 is formed in a cross-sectional concave shape having a predetermined depth of a bottomed cylindrical shape or a substantially bottomed cylindrical shape as a whole, and has a disc shape or a substantially disc shape disc portion 41 and the disc portion 41 And a cylindrical portion 42 having a cylindrical or substantially cylindrical shape that is erected toward the left side (direction of arrow e) in the direction of the axis X1. In the pin housing body 40, the disc portion 41 and the cylindrical portion 42 are integrally formed.

  The outer end surface 31a of the disk portion 31 of the sensor housing 30 is fixed to an annular or substantially annular end surface 42a of the cylindrical portion 42 facing the left side (direction of arrow e) in the direction of the axis X1. A circular or substantially circular insertion hole 43 through which the pin rear end portion 53 of the ejector pin 50 is inserted is formed at the axial center of the disc portion 41. A female screw portion 44 as a second attaching / detaching mechanism portion is formed on the inner peripheral surface of the disk portion 41 forming the insertion hole 43.

  The ejector pin 50 is generally formed in an elongated rod shape or a substantially rod shape along the direction of the axis X1 (the direction of the arrow ef), and is formed of, for example, metal or the like. The axial center of the ejector pin 50 coincides with the axial center of the sensor housing 30, the axial center of the pin housing 40, and the axial line X1 direction (the direction of the arrow ef). However, the present invention is not limited to this, and the axis centers may not be coincident with each other.

  The ejector pin 50 has a rod-like rod portion 51 having a surface (hereinafter, also referred to as "front end surface") 51a facing the right side (arrow f direction) in the axis X1 direction contacting the molded article P described above; A neck 52 having a diameter smaller than the diameter of the rod 51 and having a predetermined length on the right side (arrow ef direction) in the direction of the axis X1, and a surface opposite to the front end face 51a of the rod 51 (Also referred to as “rear end surface”) 53a, and includes a pin rear end 53 having a diameter larger than the diameter of the neck 52. In the ejector pin 50, the rod portion 51, the neck portion 52, and the pin rear end portion 53 are integrally formed so as to extend along the right side (arrow ef direction) in the direction of the axis X1.

  The rod portion 51 of the ejector pin 50 has a cylindrical or substantially cylindrical shape as a whole, and its length in the direction of the axis X1 (the direction of the arrow ef) is sufficiently longer than its diameter. Further, the diameter of the rod portion 51 is larger than the diameter of the insertion hole 43 of the pin housing 40. The front end face 51a of the rod portion 51 is a contact portion which abuts on the molded product P molded corresponding to the shape of the cavity CT and removes the molded product P from the cavity CT.

  The neck portion 52 of the ejector pin 50 is generally cylindrical or substantially cylindrical like the rod portion 51, but has a diameter smaller than that of the rod portion 51, and the left side along the axis X1 of the rod portion 51 (Arrow e direction) is provided. The diameter of the neck portion 52 is smaller than the diameter of the insertion hole 43 of the pin housing 40. The length of the neck 52 in the direction of the axis X1 (the direction of the arrow ef) is longer than the thickness t1 of the disc portion 41 of the pin housing 40.

  The pin rear end portion 53 of the ejector pin 50 has a cylindrical or substantially cylindrical shape as a whole, and is provided on the left side (arrow e direction) along the direction of the axis X1 of the neck 52. The diameter of the pin rear end portion 53 is larger than the diameter of the neck portion 52 but smaller than the diameter of the rod portion 51. Further, the diameter of the pin rear end portion 53 is larger than the diameter of the insertion hole 43 of the pin housing 40. On the outer peripheral surface of the pin rear end portion 53, a male screw portion 54 as a first attaching / detaching mechanism portion to be screwed with the female screw portion 44 of the insertion hole 43 of the pin housing 40 is provided. The present embodiment is an example, and as described above, since the rod portion 51 and the front end face 51a are free in shape and size, the magnitude relationship of the diameters may not be as described above.

  The rear end surface 53a of the pin rear end portion 53 is provided with a protrusion 55 which protrudes from the rear end surface 53a toward the left side (direction of arrow e) in the direction of the axis X1 and whose tip is rounded. The male screw 54 and the female screw 44 are not screwed between the projection 55 of the pin rear end 53 and the outer end face 31 a of the disk 31 of the sensor housing 30, and the cavity CT is filled. In the state where the filling pressure of the molten material is not received, a predetermined clearance (clearance) c1 is provided in the direction of the axis X1 (the direction of the arrow ef), and the ejector pin 50 moves in the direction of the axis X1 (the direction of the arrow ef) It is possible.

  Next, a method of attaching the ejector pins 50 integrally to the housing cover 20 will be described with reference to FIG. FIG. 3: is explanatory drawing which shows roughly the attachment method of the ejector pin 50 in the ejector pin 10 with a sensor which concerns on the 1st Embodiment of this invention, and the removal method.

  First, as shown in FIG. 3A, the ejector pin 50 is moved toward the accommodation cover 20 on the left side (direction of the arrow e) in the direction of the axis X1. Subsequently, as shown in FIG. 3B, the pin rear end portion 53 of the ejector pin 50 is brought into contact with the insertion hole 43 of the pin housing 40, and the ejector pin 50 is rotated. Screwing of the screw 54 and the female screw portion 44 of the insertion hole 43 of the pin housing 40 is started. Subsequently, as shown in FIG. 3C, the ejector pin 50 is rotated to further move the ejector pin 50 to the left side (direction of the arrow e) in the direction of the axis X1 while screwing the male screw portion 54 and the female screw portion 44. Let

  Subsequently, as shown in FIG. 3D, when the ejector pin 50 is moved leftward (in the direction of the arrow e) in the direction of the axis X1 until the screwing of the male screw portion 54 and the female screw portion 44 is completed, the pin rear end portion 53 passes through the disc portion 41 of the pin housing 40. Subsequently, as shown in FIG. 3E, the housing cover 20 and the ejector pin 50 are integrally attached, and the sensor-mounted ejector pin 10 can be used.

  With regard to the removal method for removing the ejector pin 50 from the housing cover 20, as shown in FIGS. 3 (e) to 3 (a), the ejector pin 50 is first moved in the direction of the axis X1 in the procedure opposite to the above mounting method. It is moved to the right (in the direction of the arrow f) (FIG. 3 (e)). Subsequently, screwing of the male screw portion 54 and the female screw portion 44 is started (FIG. 3 (d)), and the ejector pin 50 is engaged with the right side in the direction of the axis X1 (arrow f) while screwing the male screw portion 54 and the female screw portion 44. 3), and then the ejector pin 50 is removed from the housing cover 20 by the end of screwing between the male screw 54 and the female screw 44 (FIG. 3 (b)). be able to.

  Next, the operation of the sensor-equipped ejector pin 10 having the above-described configuration will be described. When the front end face 51a of the ejector pin 50 moves to the left side (direction of arrow e) in the direction of the axis X1 by the filling pressure of the molten material filled in the cavity CT by the injection unit (not shown) 55 abuts on the outer end face 31a of the disk portion 31 of the sensor container 30, and a load according to the filling pressure is applied to the outer end face 31a.

  When a load is applied to the outer end surface 31a of the disk portion 31, the outer end surface 31a of the disk portion 31 bends to the left (direction of arrow e) in the direction of the axis X1, and the strain amount of the outer end surface 31a according to the bending is detected S1 detects. Then, the detection result of the detection element S1 is sent to a control unit (not shown) of the injection molding machine, and the control unit can obtain the internal pressure in the cavity CT from the amount of strain. However, the detection result of the detection element S1 may be sent to a signal amplifier or the like.

  At this time, in the sensor-equipped ejector pin 10 according to the first embodiment, the male screw portion 54 is provided at the pin rear end portion 53 of the ejector pin 50 and the female screw portion 44 is provided in the insertion hole 43 of the pin housing 40 Thus, when it is desired to use ejector pins having different diameters and shapes of the rod portion 51, the housing cover 20 can be easily replaced. Further, even when either one of the ejector pin 50 or the detection element S1 is damaged, only one of the ejector pin 50 or the detection element S1 can be replaced. For this reason, the maintainability and usability of the sensor-mounted ejector pin 10 can be greatly improved.

  Further, in the use state of the mold 1 used for the injection molding machine, the male screw portion 54 and the female screw portion 44 regulate that the ejector pin 50 is easily removed from the housing cover 20, so the housing cover 20 is used. The ejector pin 50 can be easily attached and detached simply by rotating the rod portion 51 with respect to the insertion hole 43 in the pin housing 40 of the housing cover 20 while preventing the ejector pin 50 from falling off it can.

  Further, the diameter of the neck portion 52 of the ejector pin 50 is made smaller than the diameter of the insertion hole 43 in the pin housing 40 of the housing cover 20, and the rear end surface 53a of the pin rear end portion 53 from the rear end surface 53a Even when the ejector pin 50 is inclined with respect to the direction of the axis X1 (the direction of the arrow ef) by providing the protrusion 55 protruding toward the left side (the direction of the arrow e) and having a rounded tip, the outer end face Since the protrusion 55 contacts the detection element S1 in a point-to-point state with respect to 31a, a load is always applied to a specific place regardless of the presence or absence of inclination, so that the detection element S1 can accurately detect the amount of strain. it can.

Second Embodiment
Next, the configuration of the sensor-equipped ejector pin 60 according to the second embodiment of the present invention will be described. FIG. 4A is a cross-sectional view schematically showing the configuration of the sensor ejector pin 60, and FIG. 4B is a view from the direction A in FIG. 4A of the housing cover 70 of the sensor ejector pin 60. It is an arrow line view roughly shown about a case where it saw. Hereinafter, the same or similar configuration as or to that of the ejector pin with sensor 10 according to the above-described first embodiment is denoted by the same reference numeral, the description thereof is omitted, and only different configuration will be described.

  The sensor-mounted ejector pin 60 according to the second embodiment is replaced with the insertion hole 43 of the pin housing 40 of the sensor-mounted ejector pin 10 according to the first embodiment and the pin rear end 53 of the ejector pin 50. A great difference is that the insertion hole 81 of the pin housing 80 and the pin rear end portion 91 of the ejector pin 90 are provided.

  In this case, the insertion hole 81 of the pin housing 80 is formed to have a diameter slightly larger than the neck portion 52 of the ejector pin 50, and a circular or substantially circular through hole for inserting the pin rear end portion 91 of the ejector pin 90. It is. Further, in the insertion hole 81, a pair of insertion grooves 81a and 81b are respectively formed in the width direction (arrow cd direction) from the central portion in the height direction (arrow ab direction) of the inner peripheral surface. ing. As shown in FIG. 4B, the pair of insertion grooves 81a and 81b are formed in a rectangular shape or a substantially rectangular shape when viewed from the A direction in FIG. 4A.

  The pin rear end portion 91 of the ejector pin 90 includes a pair of projecting portions 92 and 93 extending in the height direction (the direction of the arrow ab) from the center side of the ejector pin 90 toward the inner peripheral surface side of the cylindrical portion 42 . The pair of projections 92, 93 are slightly smaller than the insertion grooves 81a, 81b when viewed in the direction of the axis X1 (the direction of the arrow ef), and have a rectangular or substantially rectangular shape corresponding to the insertion grooves 81a, 81b as a whole. It is formed. However, the present invention is not limited to this, and at least one protrusion may be provided, and the insertion grooves may be formed in the number and position corresponding to the protrusions.

  The pin rear end portion 91 has a tapered shape whose diameter gradually decreases toward the left side (direction of the arrow e) in the direction of the axis X1, and contacts the outer end surface 31a of the disk portion 31 of the sensor housing 30. Has a rounded tip. A predetermined clearance (clearance) in the direction of the axis X1 (the direction of the arrow ef) between the end of the pin rear end portion 91 and the outer end face 31a without receiving the filling pressure of the molten material filling the cavity CT. c1 is formed, and the ejector pin 90 is movable in the direction of the axis X1 (the direction of the arrow ef).

  Next, a method of removing the ejector pin 90 from the housing cover 70 will be described. First, in FIG. 4A, the ejector pin 90 is rotated clockwise or counterclockwise by 90 degrees or approximately 90 degrees, and the pair of projecting portions 92, 93 of the pin rear end portion 91 is inserted into the pair of insertion holes 81. It is rotated to a position facing the insertion grooves 81a and 81b. Subsequently, the ejector pin 50 is moved to the right (in the direction of the arrow f) in the direction of the axis X1, and the pair of projecting portions 92, 93 is inserted into the pair of insertion grooves 81a, 81b. Thus, the ejector pin 90 can be removed from the housing cover 70.

  In the mounting method of integrally attaching the ejector pin 90 from the housing cover 70, first, the pair of projecting portions 92, 93 of the pin rear end portion 91 are aligned with the positions facing the pair of insertion grooves 81a, 81b of the insertion hole 81. Subsequently, the ejector pin 90 is moved to the left side (the direction of the arrow e) in the direction of the axis X1, and the pair of projecting portions 92, 93 is inserted into the pair of insertion grooves 81a, 81b.

  Subsequently, when the pair of projecting portions 92 and 93 are inserted into the pair of insertion grooves 81a and 81b, the pin rear end portion 91 penetrates the disc portion 41 of the pin housing 80. Subsequently, the ejector pin 90 is rotated clockwise or counterclockwise 90 degrees or approximately 90 degrees. In this manner, the housing cover 70 and the ejector pin 90 are integrally attached, and the sensor-mounted ejector pin 60 can be used.

  Thus, in the sensor-equipped ejector pin 60 according to the second embodiment, the pin rear end portion 91 of the ejector pin 90 is provided with the pair of projecting portions 92 and 93, and the insertion hole 81 of the pin housing 80 is paired with Insertion grooves 81a and 81b were formed. Therefore, when it is desired to use an ejector pin having a different diameter and shape of the rod portion 51 by merely inserting and removing the pair of projecting portions 92 and 93 in a position facing the pair of insertion grooves 81a and 81b, the housing cover It can be easily replaced for 70. Also, even if either the ejector pin 90 or the detection element S1 is broken, only one of the ejector pin 90 or the detection element S1 can be replaced. For this reason, the maintainability and usability of the sensor-mounted ejector pin 60 can be greatly improved.

  Further, the ejector pin 90 is rotated clockwise or counterclockwise by a predetermined angle, and the pair of projections 92, 93 is displaced from the position facing the pair of insertion grooves 81a, 81b, so that the pair of projections 92, By 93, the ejector pin 90 is restricted from easily coming off from the accommodation cover 70. For this reason, the ejector pin 90 can be prevented only by rotating the rod portion 51 with respect to the insertion hole 81 in the pin accommodating body 80 of the accommodating cover 70 while preventing the ejector pin 90 from falling out of the accommodating cover 70. It can be easily attached and detached.

  Further, the insertion hole 81 of the pin housing body 80 is a through hole formed to have a diameter slightly larger than the neck portion 52 of the ejector pin 90, thereby permitting even a slight inclination, The blunt tip makes it possible to constantly press at a specific location in a steady state, which stabilizes the measurement.

Third Embodiment
Next, the configuration of the sensor-equipped ejector pin 100 according to the third embodiment of the present invention will be described. 5 (a) is a cross-sectional view schematically showing the configuration of the sensor-equipped ejector pin 100, and FIG. 5 (b) is a view from the direction A in FIG. 5 (a) of the housing cover 110 of the sensor-equipped ejector pin 100. It is an arrow line view roughly shown about a case where it saw. Hereinafter, the same or similar configuration as or to that of the ejector pin with sensor 10 according to the above-described first embodiment is denoted by the same reference numeral, the description thereof is omitted, and only different configuration will be described.

  The sensor ejector pin 100 according to the third embodiment includes the insertion hole 43 of the pin housing 40 of the sensor ejector pin 10 according to the first embodiment, the pin rear end 53 of the ejector pin 50, and the neck 52. Instead of the above, the insertion holes 121 to 123 of the pin housing 120 are formed, and the pin rear end portion 131 and the neck portion 134 of the ejector pin 130 are provided.

  In this case, the pin rear end portion 131 of the ejector pin 130 has a pair of barbs 132 and 133. The pair of barbs 132 and 133 extend toward the inner peripheral surface side (height direction (arrow ab direction)) of the pin housing 120 as they extend from the pin rear end portion 131 to the rod 51 side. It is a plate-like member whose cross-sectional shape is umbrella-like. In addition, the pair of barbed portions 132 and 133 are each elastically deformable on the center side of the ejector pin 130. The pair of barbs 132 and 133 have a width (hereinafter, also referred to as “maximum width”) which is expanded in the height direction (direction of arrow ab) than the diameter of the insertion hole 121 of the pin housing 120 as a default state. It has W1.

  The pin rear end portion 131 has a tapered shape whose diameter gradually decreases toward the left side (direction of the arrow e) in the direction of the axis X1, and contacts the outer end surface 31a of the disk portion 31 of the sensor housing 30. Has a rounded tip. Between the tip of the pin rear end portion 131 and the outer end surface 31a, a predetermined clearance (clearance) in the direction of the axis X1 (the direction of the arrow ef) without receiving the filling pressure of the molten material filling the cavity CT. c1 is formed, and the ejector pin 130 is movable in the direction of the axis X1 (the direction of the arrow ef).

  The neck portion 134 of the ejector pin 130 is smaller than the diameter of the rod portion 51 but larger than the diameter of the pin rear end portion 131. In addition, the neck portion 134 has a diameter slightly smaller than the insertion hole 121 of the pin housing 120.

  The insertion hole 121 of the pin housing body 120 is a circular or substantially circular insertion hole through which the pin rear end portion 131 of the ejector pin 130 is inserted. Further, the diameter of the insertion hole 121 is smaller than the maximum width W1 of the pair of barbed portions 132 and 133. Further, in the pin housing body 120, the pair of barbs 132, 133 is disposed at a position corresponding to the tip of the pair of barbs 132, 133 in the height direction of the cylindrical portion 42 (arrow ab direction). A pair of insertion holes 122 and 123 are formed as openings for pushing toward the center of the head. However, the present invention is not limited to this, and at least one barb may be provided, and the insertion grooves may be provided in the number and position corresponding to the barb.

  Next, a method of removing the ejector pin 130 from the housing cover 110 will be described. First, in FIG. 5A, a pair of insertion rods (not shown) are inserted from the pair of insertion holes 122 and 123 of the pin housing 120, and the tip portions of the pair of barbs 132 and 133 are ejector pins 130. Push toward the center of the Subsequently, when the tip end portions of the pair of barbed portions 132 and 133 are pushed into the insertion holes 121, the pair of barbed portions 132 and 133 are deformed toward the center side of the ejector pin 130 by elastic deformation.

  Subsequently, when the maximum width W1 of the pair of barbed portions 132 and 133 narrows due to elastic deformation and becomes smaller than the diameter of the insertion hole 121, the ejector pin 130 is moved to the right (arrow f direction) in the axis X1 direction. Thus, the ejector pin 130 can be removed from the housing cover 110.

  In the mounting method for integrally mounting the ejector pin 130 from the housing cover 110, first, the ejector pin 130 is moved to the left side (direction of arrow e) in the direction of the axis X1, and the pin rear end portion 131 of the ejector pin 130 is a pin housing It is pushed into the insertion hole 121 of 120. Subsequently, when the pin rear end portion 131 is pushed into the insertion hole 121, the pair of barbed portions 132 and 133 is deformed by elastic deformation toward the center side of the ejector pin 130.

  Subsequently, the ejector pin 130 is moved to the left (direction of the arrow e) in the direction of the axis X1 while elastically deforming the pair of barbs 132 and 133, and the pair of barbs 132 and 133 are inserted through the pin housing 120 Insert it in 121. When the pair of barbs 132 and 133 are inserted into the insertion holes 121 of the pin housing 120, the pair of barbs 132 and 133 are in a state of penetrating the disc portion 41 of the pin housing 120.

  When the pair of barbs 132 and 133 penetrate the disc portion 41 of the pin housing 120, the elastic deformation of the pair of barbs 132 and 133 is released, and the pair of barbs 132 and 133 return to the maximum width W1. It will be larger than 121. Thus, the ejector pin 130 is integrally attached to the housing cover 110, and the sensor-equipped ejector pin 100 can be used.

  As described above, in the sensor-equipped ejector pin 100 according to the third embodiment, the pair of barbed portions 132 and 133 that can be deformed by elastic deformation toward the center of the ejector pin 130 at the pin rear end portion 131 of the ejector pin 130. The diameter of the insertion hole 121 of the pin housing 120 is smaller than the maximum width W1 of the pair of barbs 132 and 133.

  Therefore, at the time of mounting, the pin rear end portion 131 of the ejector pin 130 is pushed into the insertion hole 121 of the pin housing 120, and at the time of dismounting, the tip portions of the pair of barbed portions 132 and 133 are the centers of the ejector pin 130 If it is desired to use an ejector pin having a different diameter or shape of the rod portion 51 simply by pushing it toward the side, the housing cover 110 can be easily replaced. Also, even if either the ejector pin 130 or the detection element S1 is broken, only one of the ejector pin 130 or the detection element S1 can be replaced. For this reason, the maintainability and usability of the sensor-equipped ejector pin 100 can be greatly improved.

  Further, the pin rear end portion 131 of the ejector pin 130 is simply pushed into the insertion hole 121 of the pin housing 120 and penetrated to the disc portion 41 of the pin housing 120. It regulates that the pin 130 is easily removed. For this reason, the ejector pin 130 is prevented from falling out of the housing cover 110, and at the time of mounting / removal, the ejector is simply inserted by pushing the pair of barbs 132, 133 into the insertion holes 121 in the pin housing 120 of the housing cover 110. The pin 130 can be easily attached and detached.

  Also, by making the neck portion 134 of the ejector pin 130 a diameter slightly smaller than the insertion hole 121 of the pin housing 120, even if it is slightly inclined, it is tolerated, and always by the blunt and pointed tip Measurement can be stabilized because a specific place can be pressed in a dotted state.

Fourth Embodiment
Next, the configuration of the sensor-equipped ejector pin 140 according to the fourth embodiment of the present invention will be described. 6 (a) is a cross-sectional view schematically showing the configuration of the sensor-equipped ejector pin 140, and FIG. 6 (b) is a view from the direction A in FIG. 6 (a) of the housing cover 150 of the sensor-equipped ejector pin 140. It is an arrow line view roughly shown about a case where it saw. Hereinafter, the same or similar configuration as or to that of the ejector pin with sensor 10 according to the above-described first embodiment is denoted by the same reference numeral, the description thereof is omitted, and only different configuration will be described.

  The sensor mounted ejector pin 140 according to the fourth embodiment is a pin housing instead of the pin housing 40 of the sensor mounted ejector pin 10 and the pin rear end portion 53 of the ejector pin 50 according to the first embodiment. A great difference is that 160 and a pin rear end portion 171 of the ejector pin 170 are provided.

  In this case, the pin rear end portion 171 of the ejector pin 170 has, for example, the same shape as a convex portion which is a so-called tip portion on the handle side, which is used for a socket wrench. The pin rear end portion 171 has a pair of flat surfaces (hereinafter, referred to as axial opposite surfaces) facing each other in the direction of the axis X1 (the direction of the arrow ef) among the surfaces formed in a square pole shape or a substantially square pole shape as a whole. A pair of flat surfaces (hereinafter referred to as widthwise facing surfaces) 174 and 175 opposed in the widthwise direction (arrow cd direction) are provided. However, the present invention is not limited to this, and the axially facing surfaces 172 and 173 and the widthwise facing surfaces 174 and 175 may have curved surfaces recessed toward the center of the ejector pin 170, respectively.

  The inner peripheral surface side (the height direction (arrow ab direction from the central portion) of the substantially central portion of the axially opposed surface 173 which is the lower surface of the pair of axially opposed surfaces 172 and 173 is A generally spherical or substantially spherical ball 176 having a portion projecting toward the)) is provided. The ball 176 is biased such that a portion thereof protrudes from the axially facing surface 173 as a default state.

  The rear end surface 171a of the pin rear end portion 171 is provided with a protrusion 177 having a rounded tip, which protrudes from the rear end surface 171a toward the left side (direction of arrow e) in the axis X1 direction. Between the projection 177 of the pin rear end portion 171 and the outer end face 31a of the disk portion 31 of the sensor housing 30, the filling pressure in the cavity CT does not receive the filling pressure of the molten material. A predetermined clearance (clearance) c1 is formed in the ef direction), and the ejector pin 170 is movable in the axial line X1 direction (the arrow ef direction).

  The pin housing 160 has, for example, a recess similar to the socket of a socket wrench. The pin housing 160 is formed in a cylindrical or substantially cylindrical shape as a whole, and penetrates in the direction of the axis X1 (the direction of the arrow ef) at the axial center of the pin housing 160. A support insertion hole 161 supporting the end portion 171 is formed.

  The support insertion hole 161 is formed in a rectangular shape or a substantially rectangular shape when viewed from the A direction in FIG. 6A, as shown in FIG. 6B, in the direction of the axis X1 (arrow ef direction). A pair of opposing flat surfaces (hereinafter referred to as axial facing surfaces) 162, 163 and a pair of flats (hereinafter referred to as width opposing surfaces) 164, 165 opposed in the width direction (arrow cd direction) are provided. However, the present invention is not limited to this. The axially opposing surfaces 162 and 163 and the widthwise opposing surfaces 164 and 165 are the axially opposing surfaces 172 and 173 and the widthwise opposing surface 174 of the pin rear end portion 171 of the ejector pin 170, In the case of the curved surface 175, it may have a curved surface that is recessed toward the center of the ejector pin 170 corresponding to the curved surface.

  In addition, it is provided at a position substantially corresponding to the ball 176 of the pin rear end portion 171 at a substantially central portion of the axially opposite surface 163 which is a lower surface of the pair of axially opposed surfaces 162 and 163. Alternatively, a concaved ball accommodating portion 166 having a predetermined depth of a substantially bottomed rectangular parallelepiped shape is provided. The length of the ball housing portion 166 in the direction of the axis X1 (the direction of the arrow ef) is longer than the diameter of the ball 176 at the pin rear end portion 171.

  Between the projection 177 of the pin rear end portion 171 and the outer end face 31a of the disk portion 31 of the sensor housing 30, the filling pressure in the cavity CT does not receive the filling pressure of the molten material. A predetermined clearance (clearance) c1 is formed in the ef direction), and the ejector pin 170 is movable in the axial line X1 direction (the arrow ef direction).

  Next, a method of attaching the ejector pin 170 integrally to the housing cover 150 will be described. First, in FIG. 5A, the ejector pin 170 is moved to the left side (direction of arrow e) in the direction of the axis X1, and the pin rear end portion 171 of the ejector pin 170 is pushed into the support insertion hole 161 of the pin housing 160. Subsequently, when the pin rear end portion 171 is pushed into the support insertion hole 161, the ball 176 is pushed toward the center side of the ejector pin 170 from the default state by the axially facing surface 163.

  Subsequently, the ejector pin 170 is moved to the left side (direction of the arrow e) in the direction of the axis X1 while the ball 176 is pushed to the center side of the ejector pin 170 to move the ball 176 in the support insertion hole 161 of the pin housing 160 Position in the housing portion 166. When the ball 176 is positioned in the ball housing portion 166, the biasing force of the ball 176 causes a part of the ball 176 to protrude toward the ball housing portion 166, and the ball 176 returns to the default state again. In this manner, the housing cover 110 and the ejector pin 130 are integrally attached, and the sensor-equipped ejector pin 100 can be used.

  In the removal method for removing the ejector pin 170 from the housing cover 150, first, the ejector pin 170 is moved to the right (in the direction of arrow f) in the direction of the axis X1. Subsequently, when the ejector pin 170 is moved to the right (in the direction of the arrow f) in the direction of the axis X1, the ball 176 is pushed toward the center of the ejector pin 170 from the default state by the axially facing surface 163. Subsequently, the ejector pin 170 is moved to the right (in the direction of the arrow f) in the direction of the axis X1 while the ball 176 is pushed toward the center of the ejector pin 170. Thus, the ejector pin 170 can be removed from the housing cover 150.

  As described above, in the sensor-equipped ejector pin 140 according to the fourth embodiment, the ball 176 biased so that a part thereof protrudes from the axially facing surface 173 is formed on the pin rear end portion 171 of the ejector pin 170. A ball housing portion 166 is provided in the support insertion hole 161 of the pin housing 160 corresponding to the ball 176. Therefore, at the time of installation, the pin rear end portion 171 of the ejector pin 170 is pushed into the support insertion hole 161 of the pin housing 160, and at the time of removal, the ejector pin 170 is pulled out to the right (arrow f direction) along the axis X1. When it is desired to use ejector pins having different diameters and shapes of the portions 51, the housing cover 150 can be easily replaced. Further, even when either the ejector pin 170 or the detection element S1 is broken, only one of the ejector pin 170 or the detection element S1 can be replaced. For this reason, the maintainability and usability of the sensor-equipped ejector pin 140 can be greatly improved.

  Also, the ball 176 and the pin 176 are simply pushed into the support insertion hole 161 of the pin housing 160 so that the ball 176 is positioned in the ball housing portion 166 of the support insertion hole 161 of the pin housing 160. The ball accommodating portion 166 restricts the ejector pin 170 from easily coming out of the accommodating cover 150. Therefore, it is possible to prevent the ejector pin 170 from falling off from the housing cover 150, and at the time of mounting / removal only by pushing or pulling out the pin rear end portion 171 with respect to the support insertion hole 161 in the pin housing 160 of the housing cover 150. The ejector pin 170 can be easily attached and detached.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments of the present invention, and includes all aspects included in the concept and claims of the present invention. In addition, the configurations may be combined appropriately as appropriate so as to achieve at least a part of the problems and the effects described above. For example, the shape, material, arrangement, size, and the like of each component in the above embodiment can be appropriately changed according to the specific use mode of the present invention.

  In addition, as the ejector pin with sensor 10, a neck portion and a rear end portion are provided on the ejector pin and the case where the pin housing is provided on the housing cover has been described, but the present invention is not limited thereto. As shown, the ejector pin may be provided with a pin housing, and the housing cover may be provided with a neck and a rear end.

  For example, as shown in FIG. 7, a neck 52 and a pin rear end 53 are provided substantially at the center of the outer end face 31a of the disk 31 of the sensor housing 30, and the pin housing 40 is provided on the ejector pin 50. It is also good. In such a case, when the front end face 51a of the ejector pin 50 is moved to the left side in the direction of the axis X1 (arrow e direction) by the filling pressure of the molten material filled in the cavity CT by the injection unit (not shown) The projections 55 at 53 abut the ejector pins 50, and a load according to the filling pressure is applied to the outer end surface 31a.

  When a load is applied to the outer end surface 31a of the disk portion 31, the outer end surface 31a of the disk portion 31 bends to the left (direction of arrow e) in the direction of the axis X1, and the strain amount of the outer end surface 31a according to the bending is detected S1 detects. Then, the detection result of the detection element S1 is sent to a control unit (not shown) of the injection molding machine, and the control unit can obtain the internal pressure in the cavity CT from the amount of strain.

  At this time, in the ejector pin with sensor 10 according to the other embodiment shown in FIG. 7, the male screw portion 54 is provided at the pin rear end portion 53, and the female screw portion 44 is provided in the insertion hole 43 of the pin housing 40 of the ejector pin 50. Thus, when it is desired to use ejector pins having different diameters and shapes of the rod portion 51, the housing cover 20 can be easily replaced. Further, even when either one of the ejector pin 50 or the detection element S1 is damaged, only one of the ejector pin 50 or the detection element S1 can be replaced. For this reason, the maintainability and usability of the sensor-mounted ejector pin 10 can be greatly improved.

  Further, as shown in FIG. 8, the neck portion 52 and the rear end portion 91 are provided substantially at the center of the outer end surface 31 a of the disk portion 31 of the sensor housing 30, and the pin housing 80 is provided on the ejector pin 90. Good. In this case, the pin rear end portion 91 of the outer end face 31a is provided with a pair of projecting portions 92, 93, and the insertion hole 81 of the pin housing 80 of the ejector pin 90 is formed with a pair of insertion grooves 81a, 81b. It is done.

  Further, as shown in FIG. 9, the neck portion 134 and the rear end portion 131 are provided substantially at the center of the outer end surface 31 a of the disk portion 31 of the sensor housing 30, and the pin housing 120 is provided on the ejector pin 130. Good. In this case, the pin rear end portion 131 of the outer end face 31a is provided with a pair of barbs 132 and 133 which can be deformed by elastic deformation on the center side of the ejector pin 130, and the insertion hole in the pin housing 120 of the ejector pin 130 The diameter of 121 was made smaller than the maximum width W1 of a pair of barbs 132,133.

  Further, as shown in FIG. 10, the rear end 171 may be provided substantially at the center of the outer end face 31a of the disk 31 of the sensor housing 30, and the pin housing 160 may be provided on the ejector pin 170. In this case, the pin rear end portion 171 of the outer end face 31a is provided with a ball 176 biased so that a part thereof protrudes from the axial facing surface 173, and the support insertion hole of the pin housing 160 of the ejector pin 170 A ball accommodating portion 166 is provided corresponding to the ball 176 at 161.

  Further, although the case where the protrusion 55 is provided on the rear end surface 53a of the pin rear end portion 53 as the sensor-equipped ejector pin 10 has been described, the present invention is not limited to this. The protrusion 55 may be provided at a substantially central portion of the outer end surface 31 a of the disk portion 31. Further, as for the ejector pin with sensor 60, 100, 140, as in FIG. 11, the tapered shape of the pin rear end 91 and the pin rear end 131 and the projection 177 are provided substantially at the center of the outer end face 31a. May be

  Further, as the sensor-equipped ejector pin 10, the case has been described where the sensor housing body 30 is formed in a hollow cylindrical shape or a substantially cylindrical shape as a whole, but the present invention is not limited to this, as shown in FIG. The left side (the direction of the arrow e) of the sensor housing 30 may be open, and the sensor housing space 21 may be filled with a resin 23 such as silicon. By filling the resin 23, the detection elements S1 to Sn can be protected from erosion by foreign matter and gas.

  In addition, as the ejector pin with sensor, although the first attachment / detachment mechanism portion is provided at the pin rear end portion of the ejector pin and the second attachment / detachment mechanism portion is provided in the insertion hole of the pin housing, the present invention Not limited to this, the second attaching / detaching mechanism may be provided at the pin rear end of the ejector pin, and the first attaching / detaching mechanism may be provided in the insertion hole of the pin housing. For example, the ball housing portion 166 may be provided at the pin rear end portion 171 of the ejector pin 170, and the ball 176 may be provided in the support insertion hole 161 of the pin housing 160.

Fifth Embodiment
FIG. 13 is a perspective view schematically showing a configuration of a sensor-equipped ejector pin according to a fifth embodiment of the present invention. FIGS. 14A and 14B are a cross-sectional view and a plan view schematically showing a cross-sectional configuration and a top surface configuration of a sensor-equipped ejector pin according to a fifth embodiment of the present invention. FIG. 15 is a perspective view for explaining a method of attaching the ejector pin with a sensor according to the fifth embodiment of the present invention to the housing cover. Hereinafter, the same or similar reference numerals are given to the same or similar configurations as the sensor-mounted ejector pin 10 according to the first embodiment, and the description thereof will be omitted, and only different configurations will be described.

  As shown in FIG. 13 to FIG. 15, the sensor-equipped ejector pin 200 according to the fifth embodiment includes a housing cover 220 which is generally hollow cylindrical or substantially cylindrical in shape, and is detachable from the housing cover 220. And an ejector pin 250 attached. However, also in this case, the appearance configuration of the housing cover 220 is not particularly limited.

  The housing cover 220 has a sensor housing 230 in which a sensor housing space 221 for housing the detection element S1 is formed, and a head 253 of the ejector pin 250 that protrudes in a flange shape by expanding in a direction perpendicular to the axis X1 ( The pin housing body 240 as a mounting and demounting mechanism portion in which the pin housing space 222 for housing the pin housing is formed is provided, and both are integrally fixed to each other in the direction of the axis X1 (the arrow ef direction). In this case, it is assumed that the axial center of the sensor housing 230 and the axial center of the pin housing 240 coincide with each other in the direction of the axis X1. However, the present invention is not limited to this, and the axis centers of both may not be completely coincident with each other.

  Here, the housing cover 220 has a welding mark 260 in which the contact portion between the sensor housing 230 and the pin housing 240 is joined by arc welding or the like. The welding mark 260 is a contact portion between the sensor housing 230 and the pin housing 240, and is annularly provided over the entire circumference so as to straddle both the sensor housing 230 and the pin housing 240 at the contact portion. .

  The sensor housing 230 and the pin housing 240 are formed of, for example, metal or resin, and the outer diameter of the sensor housing 230 is larger than the outer diameter of the pin housing 240. The reason for this is to prevent in advance that the welding mark 260 when joining the sensor housing 230 and the pin housing 240 by welding protrudes to the outer peripheral side than the outer peripheral surface of the sensor housing 230.

  The sensor housing 230 is formed in a hollow cylindrical or substantially cylindrical shape as a whole, and includes a pair of disc-shaped or substantially disc-shaped disc portions 231 and 232 opposed in the direction of the axis X1 (the direction of the arrow ef) It has a cylindrical or substantially cylindrical cylindrical portion 233 centered on an axis X1 formed between the disc portions 231 and 232. In the sensor housing 230, the disk portions 231 and 232 and the cylindrical portion 233 are integrated, and the inside is formed as a sensor housing space 221 for housing the detection element S1.

  The disk portion 231 has an outer end surface 231a parallel to the front end surface 251a provided on the front end side of the ejector pin 250, and an inner end surface 231b opposite to the outer end surface 231a and defining the sensor accommodation space 221. have.

  A detection element S1 is attached to the inner end surface 231b of the disk portion 231 so as to cover substantially the entire surface. The disk portion 231 is a strain generating body interposed between the head portion 253 of the ejector pin 250 and the detection element S1, and the head portion 253 of the ejector pin 250 indirectly presses the detection element S1. It functions as a pressing plate.

  In the outer end surface 231a on the right side (the arrow f direction) of the disk portion 231, a housing concave portion 231R having a disk shape in plan view that can be fitted with a part of the left side (the arrow e direction) of the pin housing 240 is formed. The housing recess 231R is a concave space recessed from the outer end surface 231a of the disk portion 231 to the left side (direction of arrow e) by a predetermined depth, and the disk-like bottom surface 231s and the outer peripheral edge of the bottom surface 231s It is defined by an annular side surface 231v with respect to the axis X1 extending in the f direction). In this case, the head portion 253 of the ejector pin 250 presses the bottom surface 231s of the disc portion 231.

  The inner diameter of the side surface 231v of the disk portion 231 forming the housing recess 231R is substantially the same as the outer diameter of the pin housing 240. For this reason, positioning at the time of attaching the pin accommodating body 240 with respect to the accommodating recessed part 231R of the disk part 231 is easy. In the cylindrical portion 233, a wiring hole 234 for taking out the wiring S1a of the detection element S1 is formed.

  The pin housing body 240 is formed in a concaved cross section having a predetermined depth of a bottomed cylindrical shape or a substantially bottomed cylindrical shape as a whole, and has a disc shape or a substantially disc shaped disc portion 241 and its disc portion 241. A cylindrical or substantially cylindrical cylindrical portion 242 is provided standing from the outer peripheral edge toward the left side (direction of arrow e) in the direction of the axis X1. In this case, the disc portion 241 and the cylindrical portion 242 are integrally formed.

  The disk portion 241 is formed with a cutout portion 243 having a substantially U shape in plan view having a predetermined width d1 having a shape partially cut away from the outer peripheral side of the disk portion 241 toward the center C1 side. ing. The width d1 of the notch portion 243 is slightly larger than the outer diameter d2 of the rod portion 251 (described later) of the ejector pin 250. In addition, the notch portion 243 has an opening portion 243 h in which a part of the outer peripheral edge of the disk portion 241 is opened.

  The cylindrical portion 242 is formed with a notch portion 244 having a substantially U-shape in a plan view and having a predetermined width d3 extending from the center C1 of the cylindrical portion 242 toward the outer peripheral side of the cylindrical portion 242. The width d3 of the notch 244 is slightly larger than the outer diameter d4 of the head 253 of the ejector pin 250. The notch 244 also has an opening 244 h in which a part of the outer peripheral edge of the cylindrical portion 242 is opened.

  The width w1 in the direction of the axis X1 in the pin accommodation space 222 of the cylindrical portion 242 is larger than the width in the direction of the axis X1 of the head 253 of the ejector pin 250. Therefore, when both are joined by welding in a state in which the side end surface 242a of the cylindrical portion 242 of the pin housing 240 is in contact with the disk portion 231 of the sensor housing 230, the disk portion 231 of the sensor housing 230 and the pin housing Between the disc portion 241 of the body 240, a pin accommodation space 222 is formed, in which the ejector pin 250 can move along the direction of the axis X1.

  In the pin housing 240, the notch 244 of the cylindrical portion 242 and the notch 243 of the disk 241 are spatially connected in the direction of the axis X1, and the notch 244 and the notch 243 are also perpendicular to the direction of the axis X1. Connected spatially in one direction.

  Here, since the width d1 of the notch portion 243 of the disk portion 241 is narrower than d2 of the notch portion 244 of the cylindrical portion 242, the head portion 253 of the ejector pin 250 is in the direction of the axis X1 at the periphery of the notch portion 243 of the disk portion 241. An edge portion 243 e is formed which functions as a lockable flange portion. The end edge portions 243 e extend in parallel to one another along the periphery of the notch portion 243 so as to form a substantially U-shape, and are connected near the center C 1.

  The ejector pin 250 as a whole is formed as a rod-like or rod-like member elongated along the direction of the axis X1 (the direction of the arrow ef), for example, metal. The axial center of the ejector pin 250 coincides with the axial center of the sensor housing 230, the axial center of the pin housing 240, and the axis X1 direction (the direction of the arrow ef). However, the present invention is not limited to this, and the axis centers of the respective axes do not have to completely coincide with each other.

  The ejector pin 250 has a rod-like rod portion 251 having a front end face 251a facing the right side (arrow f direction) in the direction of the axis X1 which abuts the molded article P described above, and the left side (arrow e direction) And a head portion 253 having an outer diameter d4 larger than the outer diameter d2 of the rod portion 251. That is, the head portion 253 of the ejector pin 250 is larger in diameter than the outer diameter d2 of the rod portion 251.

  The rod portion 251 has a cylindrical or substantially cylindrical shape as a whole, and the length in the direction of the axis X1 (the direction of the arrow ef) is sufficiently longer than the diameter thereof. Further, the outer diameter d2 of the rod portion 251 is slightly smaller than the width d1 of the notch portion 243.

  The head portion 253 has an arc-shaped rear end surface 253a (protrusion) convexly bulging toward the left side (direction of the arrow e) in the direction of the axis X1, and the disk of the sensor housing 230 at the tip which becomes the center of the rear end surface 253a. It is a functional portion that presses the bottom surface 231s forming the accommodation recess 231R of the portion 231 by point contact.

  Further, the head portion 253 has an umbrella portion 253 u which is expanded in the radial direction more than the outer diameter d 2 of the rod portion 251. Therefore, as shown in FIG. 15, the ejector pin 250 can be inserted while being slid from a direction perpendicular to the axis X1 from the notch 244 of the cylindrical portion 242 in the pin housing 240 and the notch 243 of the disk portion 241. It becomes. When the ejector pin 250 is moved in the direction of the axis X1 after the ejector pin 250 is inserted, the umbrella portion 253u of the head 253 is locked to the end edge portion 243e of the disk portion 241, and further movement is restricted Be done.

  Next, the operation of the sensor-equipped ejector pin 200 having the above-described configuration will be described. The method of detecting the internal pressure in the cavity CT by the sensor-mounted ejector pin 200 by the detection element S1 is the same as that of the first embodiment, and therefore the description thereof is omitted here, and the ejector pin with respect to the housing cover 220 is omitted. The operation of attaching and detaching 250 will be mainly described.

  In the ejector pin with sensor 200, when the ejector pin 250 needs to be replaced, it is in the direction orthogonal to the axis X1 via the notch portion 244 of the cylindrical portion 242 and the notch portion 243 of the disk portion 241 in the housing cover 220. It can be easily removed by pulling out the ejector pin 250 while sliding.

  The sensor ejector pin 200 is perpendicular to the axis X1 so as to accommodate the head 253 of the new ejector pin 250 from the notch 244 of the cylindrical portion 242 in the housing cover 220 and the notch 243 of the disk 241. It can be easily attached by sliding in a direction.

  In this case, the width d3 of the cutout portion 244 is slightly larger than the outer diameter d4 of the head portion 253 of the ejector pin 250, and the width w1 of the pin accommodation space 222 of the cylindrical portion 242 in the pin accommodation body 240 is the head of the ejector pin 250 It is larger than the width in the direction of the axis X1 (the direction of the arrow ef) of the 253. Therefore, in the ejector pin with sensor 200, the ejector pin 250 can be easily and smoothly attached and detached to and from the housing cover 220.

  In particular, in the ejector pin with sensor 200, the ejector pin 250 can be easily slid by merely sliding it through the cutouts 243 and 244 of the housing cover 220 without forcing the user to perform complicated operations such as rotating the ejector pin 250. It can be attached and detached.

Sixth Embodiment
FIG. 16 is a perspective view schematically showing a configuration of a sensor-equipped ejector pin according to a sixth embodiment of the present invention. FIG. 17 is a cross-sectional view showing a configuration of a sensor-equipped ejector pin according to a sixth embodiment of the present invention.

  The sensor attached ejector pin 270 according to the sixth embodiment has basically the same configuration as the sensor attached ejector pin 200 according to the fifth embodiment, and thus other different configurations. Will be explained.

  As shown in FIGS. 16 and 17, in the ejector pin with sensor according to the sixth embodiment, the rod portion 251 of the ejector pin 250 of the ejector pin with sensor 200 according to the fifth embodiment is provided. A spring washer 271 is newly attached as a ring-shaped member.

  The spring washer 271 is a washer made of a metal having a substantially rectangular cross section which is cut in a part in the circumferential direction and is entirely twisted, and is a component that exhibits a spring property in the longitudinal direction of the ejector pin 250 is there. The spring washer 271 is not limited to metal, and may be made of other materials such as resin.

  In the sensor-equipped ejector pin 270 having such a configuration, the ejector pin 250 to which the spring washer 271 is attached is slid from the cutout portion 244 of the cylindrical portion 242 of the pin housing 240 in the housing cover 220 and the cutout portion 243 of the disk portion 241 While inserting, attach.

  In this case, as shown in FIG. 17, the spring washer 271 is positioned in the space between the umbrella portion 253 u of the head portion 253 of the ejector pin 250 and the disc portion 241 of the pin housing 240. The biasing force is applied to press the portion 253 to the disc portion 231 of the sensor housing 230, and the biasing force is applied to press the disc portion 241 of the pin housing 240.

  As a result, a frictional force is generated by the spring washer 271 between the head portion 253 of the ejector pin 250 and the disc portion 241 of the pin housing 240 as the attachment / detachment mechanism portion, so the ejector pin 250 can be easily removed from the notches 243 and 244 Can be suppressed to

  Although the case of using the spring washer 271 has been described in the sixth embodiment, the present invention is not limited to this, and a ring-shaped member such as an endless simple washer, an O-ring, or a U-ring is used. If it can be attached to the rod portion 251 of the ejector pin 250 and friction can be generated between the head portion 253 of the ejector pin 250 and the disc portion 241 of the pin housing 240, other ring-shaped members of various configurations are used. You may do so.

Seventh Embodiment
FIG. 18 is a perspective view schematically showing a configuration of a sensor-equipped ejector pin according to a seventh embodiment of the present invention. FIGS. 19A and 19B are a cross-sectional view and a plan view schematically showing a cross-sectional configuration and a top surface configuration of a sensor-equipped ejector pin according to a seventh embodiment of the present invention. FIG. 20 is a perspective view for explaining a method of attaching the ejector pin with a sensor according to the seventh embodiment of the present invention to the housing cover. Hereinafter, the same or similar reference numerals are given to the same or similar configurations as the ejector pin with sensor 200 according to the fifth embodiment, and the description thereof will be omitted, and only different configurations will be described.

  As shown in FIGS. 18 to 20, the sensor-equipped ejector pin 300 according to the seventh embodiment is removable from the housing cover 310 which is generally hollow cylindrical or substantially cylindrical in shape and the housing cover 310. And an ejector pin 250 attached. The ejector pin 250 is the same as that of the fifth embodiment, so the description will be omitted.

  The housing cover 310 has a sensor housing 230 in which a sensor housing space 221 for housing the detection element S1 is formed, and a pin housing in which a pin housing space 332 for housing a head 253 (described later) of the ejector pin 250 is formed. A body 330 is provided, and both are integrally fixed to each other in the direction of the axis X1 (the direction of the arrow ef). In this case, the axial center of the sensor housing 230 and the axial center of the pin housing 330 coincide with each other in the direction of the axis X1. However, the present invention is not limited to this, and the axis centers may not completely coincide with each other.

  The sensor housing 230 and the pin housing 330 are formed of, for example, metal or resin, and the outer diameter of the sensor housing 230 and the outer diameter of the pin housing 330 are the same. However, the outer diameter of the sensor housing 230 may be larger than the outer diameter of the pin housing 330, and the outer diameter of the sensor housing 230 may be smaller than the outer diameter of the pin housing 330. It is also good.

  The sensor housing 230 is the same as that of the fifth embodiment, and is formed in a hollow cylindrical shape or a substantially cylindrical shape as a whole. That is, the sensor container 230 has a pair of disc-shaped or substantially disc-shaped disc portions 231 and 232 opposed in the direction of the axis X1 (the direction of the arrow ef) and the axis X1 formed between the disc portions 231 and 232 And a cylindrical portion 233 having a substantially cylindrical shape. In the sensor housing 230, the disk portions 231 and 232 and the cylindrical portion 233 are integrated, and a sensor housing space 221 for housing the detection element S1 is formed.

  The disk portion 231 has an outer end surface 231a parallel to the front end surface 251a provided on the front end side of the ejector pin 250, and an inner end surface 231b facing the outer end surface 231a and forming the sensor accommodation space 221. Have.

  A detection element S1 is attached to the inner end surface 231b of the disk portion 231 so as to cover substantially the entire surface. The disk portion 231 is a strain generating body interposed between the head portion 253 of the ejector pin 250 and the detection element S1, and the head portion 253 of the ejector pin 250 indirectly presses the detection element S1. It functions as a pressing plate. In this case, the head portion 253 of the ejector pin 250 presses the outer end surface 231 a on the right side (the direction of the arrow f) of the disk portion 231.

  The pin housing body 330 as a whole has a cylindrical or substantially cylindrical cylindrical portion 331, and an insertion hole 334h which is detachably attached to the cylindrical portion 331 and pivotally supports the ejector pin 250 so as to be insertable. And a pin guide portion 334.

  The cylindrical portion 331 has a side end face 331 a facing the disc portion 231 of the sensor housing 230. The side end surface 331 a of the cylindrical portion 331 is fixed to the outer end surface 231 a of the disk portion 231 of the sensor housing 230. However, the present invention is not limited to this, and the sensor housing 230 and the cylindrical portion 331 may have a structure integrated from the beginning.

  A female screw portion 331 m is formed on the inner circumferential surface 331 b of the cylindrical portion 331. The female screw portion 331 m is formed to have a predetermined depth from the side end surface 331 c opposite to the sensor housing 230 toward the left side (the direction of the arrow e). However, the female screw portion 331 m may be formed on the entire surface of the inner circumferential surface 331 b of the cylindrical portion 331.

  Inside the cylindrical part 331, the pin guide part 334 screwed and attached with the internal thread part 331m of the cylindrical part 331 is arrange | positioned. The pin guide portion 334 has a cylindrical or substantially cylindrical shape as a whole, and an insertion hole 334 h through which the rod portion 251 of the ejector pin 250 can be inserted is formed. The axial center of the insertion hole 334 h coincides with the axial center of the rod portion 251 of the ejector pin 250.

  The inner diameter d5 of the insertion hole 334h of the pin guide portion 334 is formed to be slightly larger than the outer diameter d2 of the rod portion 251 of the ejector pin 250. Therefore, the ejector pin 250 can move smoothly in the insertion hole 334h of the pin guide portion 334 without resistance along the direction of the axis X1 (the direction of the arrow ef).

  The pin guide portion 334 has a cylindrical or substantially cylindrical fixing portion 335 formed with an external thread portion 335 m to be screwed with the female screw portion 331 m of the cylindrical portion 331, and the right side (arrow f direction) from the fixing portion 335 And a knob portion 336 having two horizontal surfaces 336a and 336b parallel to each other along the axis X1.

  The knob portion 336 of the pin guide portion 334 is a portion that uses the horizontal surfaces 336a and 336b as "picking" when the user rotates the pin guide portion 334 with respect to the cylindrical portion 331, along the axis X1 direction. It extends to the right (in the direction of arrow f) by a predetermined length. These two horizontal surfaces 336a and 336b are surfaces after cutting a part of the cylindrical fixing portion 335 in parallel to each other along the direction of the axis X1, and are formed by, for example, cutting or injection molding.

  Therefore, the insertion hole 334 h of the pin guide portion 334 is formed so as to penetrate both the fixing portion 335 and the knob portion 336. In the pin guide portion 334, the fixing portion 335 and the knob portion 336 are integrally formed. However, the present invention is not limited to this, and the fixing portion 335 and the knob portion 336 separately provided may be adhesively fixed.

  The fixing portion 335 of the pin guide portion 334 has an external thread portion 335m which is screwed with the internal thread portion 331m of the cylindrical portion 331 on the outer peripheral surface thereof, and the outside of the disk portion 231 of the sensor housing 230 It has a side end face 335a that directly faces the end face 231a.

  Next, the operation of the sensor-equipped ejector pin 300 having the above-described configuration will be described. The method of detecting the internal pressure in the cavity CT by the sensor-equipped ejector pin 300 by the detection element S1 is the same as that of the fifth embodiment, so the description thereof is omitted here, and the ejector pin relative to the housing cover 310 The operation of attaching and detaching 250 will be mainly described.

  In the ejector pin with sensor 300, when it is necessary to replace the ejector pin 250, the horizontal surfaces 336a and 336b of the knob portion 336 of the pin guide portion 334 in the pin housing 330 of the housing cover 310 are pinched and rotated. Thus, the pin guide portion 334 and the ejector pin 250 can be removed from the cylindrical portion 331.

  Then, as shown in FIG. 20, the pin guide portion 334 is removed from the front end face 251a of the ejector pin 250, and the ejector pin 250 and the pin guide portion 334 are separated. Next, the pin guide portion 334 is engaged with the head portion 253 of the ejector pin 250 by inserting the pin guide portion 334 from the direction of the front end face 251 a of the newly prepared ejector pin 250.

  In this state, the user screwing the female screw portion 331m of the cylindrical portion 331 and the male screw portion 335m of the pin guide portion 334 through the knob portion 336 of the pin guide portion 334 with respect to the cylindrical portion 331. The ejector pin 250 can be attached via the pin guide portion 334.

  At this time, the user can freely change the position of the pin guide portion 334 in the direction of the axis X1 with respect to the cylindrical portion 331 by adjusting the amount of rotation with respect to the pin guide portion 334. That is, the user can arbitrarily adjust the distance between the head 253 of the ejector pin 250 and the disc portion 231 of the sensor housing 230 according to the amount of rotation with respect to the pin guide portion 334.

  As described above, with the ejector pin with sensor 300, the ejector pin 250 can be easily attached and detached by a simple operation of rotating the pin guide portion 334.

Eighth Embodiment
FIG. 21 is a perspective view schematically showing a configuration of a sensor-equipped ejector pin according to an eighth embodiment of the present invention. FIG. 22 is a cross sectional view schematically showing a cross sectional configuration of a sensor-equipped ejector pin according to an eighth embodiment of the present invention. FIG. 23 is a perspective view for describing a method of attaching the ejector pin with a sensor according to the eighth embodiment of the present invention to the housing cover. Hereinafter, the same or similar reference numerals are given to the same or similar configurations as the ejector pin 400 with a sensor according to the seventh embodiment, and the description thereof will be omitted, and only different configurations will be described.

  As shown in FIG. 21 to FIG. 23, the ejector pin with sensor according to the eighth embodiment has a receiving cover 410 which is generally hollow cylindrical or substantially cylindrical in shape, and is detachable from the receiving cover 410. And an ejector pin 250 attached. The ejector pin 250 is the same as that of the fifth embodiment, so the description will be omitted.

  The housing cover 410 includes a sensor housing 420 in which a sensor housing space 441 for housing the detection element S1 is formed, and a pin housing in which a pin housing space 442 for housing a head 253 (described later) of the ejector pin 250 is formed. A body 430 is provided, and both are integrally attached to each other in the direction of the axis X1 (the direction of the arrow ef). In this case, it is assumed that the axial center of the sensor housing 420 and the axial center of the pin housing 430 coincide with each other in the direction of the axis X1. However, the present invention is not limited to this, and the axis centers may not completely coincide with each other.

  The sensor housing 420 and the pin housing 430 are made of, for example, metal or resin, and the outer diameter of the pin housing 430 is larger than the outer diameter of the sensor housing 420.

  The sensor housing 420 is formed in a hollow cylindrical or substantially cylindrical shape as a whole, and includes a pair of disc-shaped or substantially disc-shaped disc portions 421 and 422 opposed in the direction of the axis X1 (the direction of the arrow ef) A cylindrical or substantially cylindrical cylindrical portion 423 centered on an axis X1 formed between the disk portions 421 and 422 is provided. In the sensor housing 420, the disk portions 421 and 422 and the cylindrical portion 423 are integrated, and a sensor housing space 441 for housing the detection element S1 is formed.

  The disc portion 421 is opposed to the outer end surface 421 a facing the head 253 provided on the pin rear end side of the ejector pin 250 in the direction of the axis X1 (direction of arrow ef) and the outer end surface 421 a. And an inner end surface 421b forming the

  A detection element S1 is attached to the inner end surface 421b of the disc portion 421 so as to cover substantially the entire surface. The disk portion 421 is a strain-generating body interposed between the head 253 of the ejector pin 250 and the detection element S1, and the head 253 is also a pressed plate for indirectly pressing the detection element S1. In this case, the head portion 253 of the ejector pin 250 presses the outer end surface 421 a on the right side (the direction of the arrow f) of the disk portion 421.

  The cylindrical portion 423 has an external thread 423 m at the end of the outer peripheral surface 423 a on the right side (the direction of the arrow f). The male screw portion 423 m may be formed over the entire surface of the outer peripheral surface 423 a of the cylindrical portion 423.

  The pin housing 430 as a whole has a cylindrical portion 431 with a bottomed cylindrical shape or a substantially cylindrical shape with a bottom, and a disc shape or a substantial shape that is detachably attached to the cylindrical portion 431 and pivotally supports the rod portion 251 of the ejector pin 250 And a disc-like disc portion 432.

  The cylindrical portion 431 has a female screw portion 431 m screwed with the male screw portion 423 m of the cylindrical portion 423 of the sensor housing 230 at the end of the left side (direction of arrow e) of the cylindrical inner circumferential surface 431 a There is. The female screw portion 431m may also be formed over the entire inner peripheral surface 431a of the cylindrical portion 431.

  The disk portion 432 is integrally formed with the cylindrical portion 431 and has an inner end surface 432 a facing the disk portion 421 of the sensor housing 420. That is, the pin housing space 442 is defined by the outer end surface 421a of the disk portion 421 in the sensor housing 420, the inner peripheral surface 431a of the cylindrical portion 431 in the pin housing 430, and the inner end surface 432a of the disk portion 432. .

  Since the inner end surface 432a of the disk portion 432 in the pin housing 430 and the head 253 of the ejector pin 250 are engaged, in the left direction (arrow e direction) in the axis X1 direction (arrow ef direction) of the ejector pin 250 Movement is free, but movement to the right (in the direction of arrow f) and falling off are prevented.

  The pin housing space 442 is an axis in accordance with the screwing state between the male screw portion 423 m of the cylindrical portion 423 in the sensor housing 420 and the female screw portion 431 m of the cylindrical portion 431 in the pin housing 430 being deep or shallow. The space length in the X1 direction (arrow ef direction) is changed.

  The disk portion 432 of the pin housing 430 has a through hole 432 h having an inner diameter slightly larger than the outer diameter of the rod portion 251 of the ejector pin 250 around the axis X 1. Therefore, the disc portion 432 of the pin housing 430 supports the rod portion 251 of the ejector pin 250 through the through hole 432 h so as to be able to move smoothly without resistance along the direction of the axis X1.

  Next, the operation of the sensor-equipped ejector pin 400 having the above-described configuration will be described. The method of detecting the internal pressure in the cavity CT by the sensor-equipped ejector pin 400 by the detection element S1 is the same as that of the fifth embodiment, and therefore the description thereof is omitted here. The operation of attaching and detaching 250 will be mainly described.

  In the ejector pin with sensor 400, when the ejector pin 250 needs to be replaced, the user grasps and rotates the outer peripheral surface 431b of the cylindrical portion 431 in the pin housing 430 of the housing cover 410, thereby rotating the cylindrical portion 431 and The ejector pin 250 can be removed from the cylindrical portion 423 of the sensor housing 420.

  Then, as shown in FIG. 23, after the pin housing body 430 is removed from the front end face 251a of the ejector pin 250, the ejector pin 250 and the pin housing body 430 are separated.

  Next, the head portion 253 of the ejector pin 250 is engaged with the disc portion 432 of the pin housing 430 by inserting the pin housing 430 from the front end face 251 a of the ejector pin 250 newly prepared.

  In this state, the user holds the outer peripheral surface 431 b of the cylindrical portion 431 in the pin housing 430 and rotates the cylindrical portion 431 to rotate the external thread portion 423 m of the cylindrical portion 423 in the sensor housing 420 and the pin housing 430. The sensor accommodating body 420 and the ejector pin 250 can be coupled via the pin accommodating body 430 by screwing the female screw portion 431 m of the cylindrical portion 431 in FIG.

  At this time, the user adjusts the amount of rotation of the pin housing 430 with respect to the sensor housing 420 so that the distance between the head 253 of the ejector pin 250 and the outer end surface 421 a of the disk portion 421 in the sensor housing 420 ) Can be set arbitrarily.

  As described above, in the ejector pin with sensor 400, the ejector pin 250 can be easily attached and detached by a simple operation of rotating the pin housing 430 with respect to the sensor housing 420.

The Ninth Embodiment
FIG. 24 is a perspective view schematically showing a configuration of a sensor-equipped ejector pin according to a ninth embodiment of the present invention. FIG. 25 is a cross-sectional view and a plan view schematically showing a cross-sectional configuration and a top surface configuration of a sensor-equipped ejector pin according to a ninth embodiment of the present invention. FIG. 26 is a perspective view for describing a method of mounting the ejector pin with a sensor according to the ninth embodiment of the present invention when the ejector pin is attached to the housing cover. Hereinafter, the same reference numerals are given to the same or similar configurations as the ejector pins 200 and 300 according to the fifth and seventh embodiments, and the description thereof is omitted, and only different configurations are described. Do.

  As shown in FIG. 24 to FIG. 26, the sensor-equipped ejector pin 500 according to the ninth embodiment is detachable from the housing cover 510 which is generally hollow cylindrical or substantially cylindrical in shape, and the housing cover 510. And an ejector pin 550 attached.

  The housing cover 510 includes a sensor housing 230 in which a sensor housing space 221 for housing the detection element S1 is formed, and a pin housing 520 for housing a rod rear end 551 of the ejector pin 550 in which a male screw 551m is formed. The two are integrally fixed to each other in the direction of the axis X1 (the direction of the arrow ef). In this case, it is assumed that the axial center of the sensor housing 230 and the axial center of the pin housing 520 coincide with each other in the direction of the axis X1. However, the present invention is not limited to this, and the axis centers may not completely coincide with each other.

  The sensor housing 230 and the pin housing 520 are made of, for example, metal or resin, and the outer diameter of the sensor housing 230 is larger than the outer diameter of the pin housing 520. Here, the housing cover 510 has a welding mark 260 in which the contact portion between the sensor housing 230 and the pin housing 520 is joined by arc welding or the like. The welding mark 260 is a contact portion between the sensor housing 230 and the pin housing 520, and is annularly provided over the entire circumference so as to straddle both the sensor housing 230 and the pin housing 520 at the contact portion. .

  The sensor housing 230 and the pin housing 520 are made of, for example, metal or resin, and the outer diameter of the sensor housing 230 is larger than the outer diameter of the pin housing 520. The reason is that the weld marks 260 when joining the sensor housing 230 and the pin housing 520 by welding do not project outward from the outer peripheral surface of the sensor housing 230.

  The sensor housing 230 is as described in the fifth embodiment, and is formed in a hollow cylindrical shape or a substantially cylindrical shape as a whole. The sensor housing 230 has a pair of disc-shaped or substantially disc-shaped disc portions 231 and 232 opposed in the direction of the axis X1 (the direction of the arrow ef), and the axis X1 formed between the disc portions 231 and 232 And a cylindrical portion 233 having a substantially cylindrical shape. In the sensor housing 230, a sensor housing space 221 for housing the detection element S1 is defined by the disk portions 231 and 232 and the cylindrical portion 233.

  The disk portion 231 has an outer end surface 231a parallel to the pin front end surface 551a of the ejector pin 250, and an inner end surface 231b opposite to the outer end surface 231a and forming the sensor accommodation space 221.

  A detection element S1 is attached to the inner end surface 231b of the disk portion 231 so as to cover substantially the entire surface. The disc portion 231 is a straining body interposed between the rod rear end 551 of the ejector pin 550 and the detection element S1, and the rod rear end 551 of the ejector pin 550 indirectly presses the detection element S1. It functions as a pressed plate to

  In the outer end surface 231a on the right side (the arrow f direction) of the disk portion 231, a housing recess 231R having a disk shape in a plan view that can be fitted with a part on the left side (the arrow e direction) of the pin housing 240 is formed. The housing recess 231R is a recess which is recessed from the outer end surface 231a of the disk portion 231 to the left side (direction of arrow e) by a predetermined depth, and the disk-like bottom surface 231s and the outer peripheral edge of the bottom surface 231s And an annular side surface 231v with respect to the axis X1 extending in the direction). The rod rear end portion 551 of the ejector pin 550 has an arc-like pin rear end surface 551s (protrusion) that bulges in a convex shape toward the left side (direction of arrow e) in the axis X1 direction. The bottom surface 231s forming the housing recess 231R of the disk portion 231 of the sensor housing 230 is pressed by point contact.

  The inner diameter of the side surface 231v of the disk portion 231 forming the housing recess 231R is substantially the same as the outer diameter of the cylindrical portion 522 of the pin housing 520. Therefore, the pin housing 520 can be accurately positioned and attached to the housing recess 231R of the disk portion 231 in the sensor housing 230.

  The pin housing body 520 is formed in a substantially U-shaped cross section having a predetermined depth of a bottomed cylindrical shape or a substantially bottomed cylindrical shape as a whole, and a disc-like or substantially disc-like disc portion 521 and its disc A cylindrical or substantially cylindrical cylindrical portion 522 is provided to stand from the outer peripheral edge of the portion 521 toward the left side (direction of arrow e) in the direction of the axis X1. In this case, the disk portion 521 and the cylindrical portion 522 are integrally formed.

  In the disc portion 521, a through hole 543 having a predetermined radius d7 with respect to the center C2 of the disc portion 521 is formed. The radius d7 of the through hole 543 is slightly larger than the outer diameter d8 of the rod rear end 551 of the ejector pin 550. Therefore, the disc portion 521 can support the ejector pin 550 movably in the direction of the axis X1 via the through hole 543.

  In the cylindrical portion 522, a prism having a predetermined length in the direction of the axis X1 (the direction of the arrow ef) and a length L1 of one side extending in a square shape in cross section extending from the center C2 of the cylindrical portion 522 toward the outer periphery of the cylindrical portion 522 An accommodation hole 523 having a shape is formed. The accommodation hole 523 is a concave space for accommodating a prismatic guide portion 560 described later.

  In the opening end portion 522t of the cylindrical portion 522, an opening hole 524 having an inner diameter larger than the length L1 of the accommodation hole 523 and having a predetermined length in the direction of the axis X1 is formed. However, the opening hole 524 does not necessarily have to be formed, and the accommodation hole 523 may extend to the side end surface 522ts of the opening end 522t of the cylindrical portion 522.

  In the accommodation hole 523 of the cylindrical portion 522, there is disposed a prismatic guide portion 560 which is formed of a prismatic member having a square cross-sectional shape having a cross-sectional similar shape to the accommodation hole 523 and an internal thread 561m formed on the inner circumferential surface. It is set up. The length L2 of one side of the prismatic guide portion 560 is slightly smaller than the length L1 of one side of the accommodation hole 523 of the cylindrical portion 522.

  The prismatic guide portion 560 is movable in the direction of the axis X1 (direction of arrow ef) in a state of being accommodated in the rectangular pillar-shaped accommodation hole 523 inside the accommodation cover 510, and an internal thread 561m that can be screwed with the ejector pin 550. , And has a similar prismatic shape corresponding to the accommodation hole 523.

  However, the present invention is not limited to this, and if the rectangular column guide portion 560 disposed in the accommodation hole 523 of the cylindrical portion 522 is disposed in the non-rotatable state when accommodated in the accommodation hole 523, the accommodation hole Both the 523 and the prismatic guide portion 560 may have a polygonal cross-sectional shape such as a regular hexagonal cross-sectional shape.

  Further, the accommodation hole 523 of the cylindrical portion 522 is longer on one side than the rod rear end 551 of the ejector pin 550 and is formed to be one size larger. Therefore, the ejector pin 550 can move smoothly in the receiving hole 523 of the cylindrical portion 522 without resistance along the direction of the axis X1 (the direction of the arrow ef).

  Next, the operation of the sensor-equipped ejector pin 500 having the above-described configuration will be described. The method of detecting the internal pressure in the cavity CT by the sensor-mounted ejector pin 500 by the detection element S1 is the same as that of the fifth embodiment, and therefore the description thereof is omitted here. The operation of attaching and detaching the 550 will be mainly described.

  In the ejector pin with sensor 500, when it is necessary to replace the ejector pin 550, it is only necessary to grasp the ejector pin 550 with a finger and rotate it. In this case, only the ejector pin 550 advances to the right (in the direction of the arrow f) along the direction of the axis X1 while the prism guide portion 560 accommodated in the accommodation hole 523 of the pin container 520 is in contact with the disc portion 521 Thus, the ejector pin 550 is completely removed from the pin holder 520.

  Then, as shown in FIG. 26, in the ejector pin with sensor 500, when attaching the ejector pin 550, first, the rod rear end 551 of the ejector pin 550 is inserted into the through hole 543 of the disc portion 521 of the pin housing 520. Insert it.

  Thereafter, by rotating the ejector pin 550, the female screw portion 561m of the rectangular column guide portion 560 housed in the housing hole 523 and the male screw portion 551m of the ejector pin 550 are screwed together, and the ejector pin 550 is Continue to rotate further. At this time, since the prismatic guide portion 560 has a prismatic shape and can not rotate in the prismatic housing hole 523, only the ejector pin 550 is a sensor container in the axis X1 direction (arrow ef direction) according to the rotation. Head towards 230.

  The user can freely adjust the position of the rear end portion 551 of the rod at the ejector pin 550 in the direction of the axis X1 (direction of the arrow ef) with respect to the disc portion 231 of the sensor housing 230 according to the amount of rotational operation on the ejector pin 550 it can. That is, the user can arbitrarily adjust the distance between the rod rear end portion 551 of the ejector pin 550 and the disc portion 231 of the sensor housing 230.

  Thus, in the ejector pin with sensor 500, the ejector pin 550 can be easily attached to and detached from the housing cover 510 by a simple operation of rotating the ejector pin 550.

  In the first to ninth embodiments described above, although the sensor ejector pin 10, 60, 100, 140, 200, 270, 300, 400, 500 is named, the housing cover 20 as a housing device is used. , 70, 110, 150, 220, 310, 410, and 510, since the ejector pins 250 and 550 are main replacement targets, they can also be referred to as ejector pin removable sensors.

  DESCRIPTION OF SYMBOLS 1 ... Mold, 2 ... Fixed side mounting plate, 3 ... Fixed side mold, 3a ... Recess, 3b ... Guide hole, 4 ... Movable side mounting plate, 5 ... Spacer block, 6 ... Movable side mold, 6a ... Convex Parts, 6b: Guide pin, 7: Ejector plate, 7a: Mold side ejector plate, 7b: Ejector rod side ejector plate, 7c: Containment cover mounting hole, 7d: Ejector pin insertion hole, 8: Ejector rod, 9: Return Pin, 10, 60, 100, 140, 200, 270, 300, 400, 500 ... Ejector pin with sensor, 20, 70, 110, 150, 220, 310, 410, 510 ... Housing cover, 21, 221, 441 ... Sensor accommodation space, 22 ... rear end accommodation space, 30, 230, 420 ... sensor accommodation body, 31, 32, 41, 231, 232, 241, 421, 422 432, 521 ... disk portion, 31a, 231a, 421a ... outer end surface, 31b, 231b, 421b ... inner end surface, 33, 42, 2333, 242, 331, 423, 431, 522 ... cylindrical portion, 34, 234 ... wiring hole 40, 80, 120, 160, 240, 330, 430, 520 ... pin housing body 42a ... end face, 43, 81, 121 to 123 ... insertion hole, 44, 331 m, 431 m, 561 m ... female screw portion, 50, 90, 130, 170, 250, 550 ... ejector pin, 51, 251 ... rod portion, 551 ... rod rear end portion, 51a, 251a ... ... front end surface, 52, 134 ... neck portion, 53, 91, 131, 171 ... pin Rear end portion, 53a ... Rear end surface, 54, 335 m, 423 m, 551 m ... Male thread portion, 55, 177 ... Protrusion, 81 a, 81 b ... Pair of insertion grooves, 2, 93: a pair of projections, 132, 133: a pair of barbs, 161: a support insertion hole, 162, 163: an axially opposed surface, 164, 165: a widthwise opposed surface, 166: a ball accommodating portion, 172, 173: axially facing surface, 174, 175: width facing surface, 176: ball, CT: cavity, P: molded article, S1 to Sn: detection element, 222, 332, 442: pin accommodation space, 231R: accommodation recess 243, 244 Notched part 243h, 244h Opening part 243e Edge part 253 Head part 253a Rear end face 253u Umbrella part 260 Weld mark 271 Spring washer 331 Cylindrical part , 331b, 431a: inner circumferential surface, 334: pin guide portion, 334h: insertion hole, 432h, 543: through hole, 335: fixing portion, 551a: pin front end face, 3 36: knob portion, 523: accommodation hole, 524: opening hole, 551: rod rear end portion, 551s: pin rear end surface, 560: prismatic guide portion.

Claims (23)

A force sensor disposed opposite to the rear end provided at a position facing the front end face of the ejector pin, and indirectly contacting the rear end;
A housing cover in which a rear end portion of the ejector pin and the force sensor are accommodated inside, and an insertion hole is formed through which the rear end portion of the ejector pin is inserted into the inside;
A storage device comprising: an attaching / detaching mechanism provided in the insertion hole of the housing cover and detachably attaching the rear end portion of the ejector pin and the housing cover. A male screw portion is provided at the rear end of the ejector pin,
The storage device according to claim 1, wherein the attaching / detaching mechanism portion is a female screw portion provided in the insertion hole of the housing cover. The rear end portion of the ejector pin is provided with a projecting portion which protrudes from the center side of the rear end portion toward the inner surface side of the accommodation cover,
The storage device according to claim 1, wherein the attaching / detaching mechanism portion is an insertion groove formed at a position corresponding to the projecting portion. The rear end of the ejector pin extends toward the inner surface of the housing cover as it extends from the rear end to the front end, and is elastically deformable on the center side of the ejector pin. A return section is provided,
The attachment / detachment mechanism portion is an insertion hole in which the diameter of the insertion hole is smaller than the maximum width of the barbed portion,
The storage device according to claim 1, wherein an opening is formed in the storage cover at a position corresponding to the barb portion. The rear end portion of the ejector pin is provided with a ball biased so that a part thereof protrudes from the rear end portion,
The storage device according to claim 1, wherein the mounting and demounting mechanism portion is a ball storage portion provided at a position corresponding to the ball of the insertion hole of the storage cover. A force sensor disposed opposite to the rear end provided at a position facing the front end face of the ejector pin, and indirectly contacting the rear end;
A housing cover for housing the rear end portion of the ejector pin and the force sensor therein;
An accommodating device comprising: an attaching / detaching mechanism provided on the accommodating cover and detachably attaching a rear end portion of the ejector pin and the accommodating cover. The rear end portion of the ejector pin has a head which is larger in diameter than the rod portion of the ejector pin,
The attaching / detaching mechanism portion is capable of slidably housing the head in the housing cover, and a cutout portion partially cut out from the outer peripheral side to the center side of the housing cover, and the head The housing device according to claim 6, further comprising: a flange portion formed in the cutout portion for locking the hook. The ring-shaped member is inserted in the clearance gap between the said head and the said flange part. The storage apparatus of Claim 7 characterized by the above-mentioned. The housing cover has a pin housing body for housing the rear end portion of the ejector pin, and a pin guide portion in which an insertion hole for inserting the ejector pin is formed.
The attaching / detaching mechanism is a screw formed on an inner peripheral surface of the pin housing and an outer peripheral surface of the pin guide, and the pin guide can be screwed with the screw of the pin housing. The housing device according to claim 6, further comprising a screw portion of The housing cover includes a sensor housing for housing the force sensor, and a pin housing for supporting the ejector pin.
The pin housing body has a disk portion in which an insertion hole through which the ejector pin is inserted is formed, and a cylindrical portion erected from an outer peripheral edge of the disk portion.
The attaching / detaching mechanism unit includes a screw portion of the sensor housing formed on an outer peripheral surface of the sensor housing and a screw portion of the sensor housing formed on an inner peripheral surface of the cylindrical portion of the pin housing. The housing device according to claim 6, further comprising: a screw portion of the pin housing capable of being screwed. The housing cover is movable in the axial direction in a state of being housed in a prismatic housing hole inside the housing cover, and the housing hole in which the insertion hole for inserting the rear end of the ejector pin is formed Has a corresponding prismatic prismatic guide part,
At the rear end of the ejector pin, an external thread is provided on the outer peripheral surface of the rear end,
The storage device according to claim 6, wherein the mounting and demounting mechanism portion is a female screw portion provided in the insertion hole of the prismatic guide portion. An ejector pin for pushing out a molded product molded according to the shape of a cavity in a mold of an injection molding machine by the front end face and removing it from the cavity;
A force sensor disposed opposite to a rear end portion provided at a position facing the front end face of the ejector pin, and indirectly contacting the rear end portion;
A housing cover in which a rear end portion of the ejector pin and the force sensor are accommodated inside, and an insertion hole is formed through which the rear end portion of the ejector pin is inserted into the inside;
And an attaching / detaching mechanism that detachably attaches the rear end portion of the ejector pin and the housing cover.
The attachment / detachment mechanism includes a first attachment / detachment mechanism provided at the rear end of the ejector pin and a second attachment / detachment mechanism provided in the insertion hole of the housing cover. Ejector pin. The first attachment / detachment mechanism portion is an external thread portion provided at the rear end portion of the ejector pin, and the second attachment / detachment mechanism portion is an internal thread portion provided in the insertion hole of the accommodation cover. The sensor-equipped ejector pin according to claim 12. The first attachment / detachment mechanism is a projection projecting toward the inner surface of the housing cover from the center side of the rear end of the ejector pin, and the second attachment / detachment mechanism corresponds to the position of the projection The ejector pin with a sensor according to claim 12, characterized in that the insertion groove is formed in The first attachment / detachment mechanism portions are mutually spread and extend toward the inner surface side of the housing cover as they extend from the rear end portion of the ejector pin to the front end face side, and can be deformed by elastic deformation to the center side of the ejector pin The second attachment / detachment mechanism is an insertion hole in which the diameter of the insertion hole is smaller than the maximum width of the bending portion,
The sensor-equipped ejector pin according to claim 12, wherein an opening is formed in the housing cover at a position corresponding to the barb portion. The first attachment / detachment mechanism is a ball biased so that a portion thereof protrudes from the rear end of the ejector pin, and the second attachment / detachment mechanism is applied to the ball of the insertion hole of the housing cover. It is a ball | bowl accommodating part provided in the corresponding position. The ejector pin with a sensor of Claim 12 characterized by the above-mentioned. An ejector pin for pushing out a molded product molded according to the shape of a cavity in a mold of an injection molding machine by the front end face and removing it from the cavity;
A force sensor disposed opposite to the rear end provided at a position facing the front end face of the ejector pin, and indirectly contacting the rear end;
A housing cover for housing the rear end portion of the ejector pin and the force sensor therein;
And an attaching / detaching mechanism that detachably attaches the rear end portion of the ejector pin and the housing cover.
The mounting and demounting mechanism portion includes a first mounting and demounting mechanism portion provided on the rear end portion of the ejector pin or the housing cover to which the ejector pin is attached, and a second mounting and demounting mechanism portion provided on the housing cover. Sensor attached ejector pin. The first attaching / detaching mechanism portion has a head whose diameter is larger than a rod portion of the ejector pin provided at a rear end portion of the ejector pin,
The second attaching / detaching mechanism portion is capable of slidably housing the head in the housing cover, and a cutout portion partially cut out from the outer peripheral side to the center side of the housing cover, and the cutout portion. The sensor-equipped ejector pin according to claim 17, further comprising: a flange portion formed in the notch for locking the head. The sensor-equipped ejector pin according to claim 18, wherein a ring-shaped member is inserted in a gap between the head portion and the flange portion. The housing cover has a pin housing body for housing the rear end portion of the ejector pin, and a pin guide portion in which an insertion hole for inserting the ejector pin is formed.
The first attaching / detaching mechanism portion is a screw portion of the pin housing formed on an inner peripheral surface of the pin housing,
The second attaching / detaching mechanism part is a screw part of the pin guide part which is formed on an outer peripheral surface of the pin guide part and which can be screwed with the screw part of the pin housing. Sensored ejector pin. The housing cover includes a sensor housing for housing the force sensor, and a pin housing for supporting the ejector pin.
The pin housing body has a disk portion in which an insertion hole through which the ejector pin is inserted is formed, and a cylindrical portion erected from an outer peripheral edge of the disk portion.
The first attachment / detachment mechanism portion is a screw portion of the sensor container formed on an outer peripheral surface of the sensor container,
The second attaching / detaching mechanism portion is a screw portion of the cylindrical portion which can be screwed to the screw portion of the sensor housing formed on an inner peripheral surface of the cylindrical portion of the pin housing. The sensor-equipped ejector pin according to claim 17. The housing cover is axially movable in a state of being housed in a prismatic housing hole inside the housing cover, and the housing hole is formed with an insertion hole through which the rear end portion of the ejector pin is inserted. Has a corresponding prismatic prismatic guide part,
The first attaching / detaching mechanism portion is an external thread portion provided on an outer peripheral surface of a rear end portion of the ejector pin,
The sensor-equipped ejector pin according to claim 17, wherein the second attaching / detaching mechanism portion is an internal thread portion provided in the insertion hole of the prismatic guide portion. The sensor-equipped ejector pin according to any one of claims 12 to 22, wherein a portion of the rear end portion of the ejector pin in indirect contact with the force sensor is a protrusion having a rounded end. .

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