JP2006326742A - Drawing holder of knocking pin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a holder allowing connection members to be easily exchanged, and a knocking pin to be efficiently drawn. <P>SOLUTION: This holder comprises a connection member 1 fitted to a workpiece and connectable with a held knocking pin for positioning, an adapter 2 holding the connection member 1 at its tip, a rod 3 connected with the rear end of the adapter 2 and having a stopper S at its terminal end, and a sashweight 4 slidably held by the rod 3, and drawing the knocking pin P fitted and held to the workpiece by applying shocks to the stopper S. The adapter 2 has a two-divided structure comprising an adapter body 2a directly connected with the rod 3 on its rear end, and a clamp nut 2b screwed and fixed on the front end of the adapter body 2a, nipping the rear end of the connection member 1 between it and the adapter body 2a, and holding the connection member 1 at the tip of the adapter 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pull-out holder for a knock pin that is fitted and held on the outer surface of a workpiece and used to position the workpiece, and can be quickly replaced even if a linkage member that is directly connected to the knock pin is damaged. In this case, the knock pin can be easily pulled out.

  In a molding apparatus or the like in which a fixed mold and a movable mold are matched to form a cavity therein, a knock pin is usually provided on the mating surface for positioning the molds.

  Such a knock pin may be removed when the mold is exchanged or adjusted. In that case, a dedicated holder for pulling out the knock pin has been used.

  As a conventional holder for pulling out the knock pin, there is known a structure in which the knock pin is sandwiched by a gripping member and the knock pin is pulled out by impact when the weight is slid along the pulling work and collides with the disc (for example, Patent Document) 1).

Japanese Patent Laid-Open No. 11-33929

  By the way, the holder has a problem that the gripping member is easily detached from the knock pin, and it is difficult to stably extract the knock pin.

  For this reason, a holder of a type in which the gripping member is changed from a sandwiching type to a screw linking member and the linking member is directly screwed into a knock pin and connected is also used. In such a holder, due to an impact when a weight is caused to collide, When the threaded portion is damaged, it takes time to replace the linkage member (including centering), and the knock pin cannot be efficiently removed, leaving room for improvement.

  An object of the present invention is to propose a novel pull-out holder that can be easily replaced even if the linkage member is broken and can realize an efficient pull-out operation of the knock pin.

The present invention relates to a linkage member connectable to a positioning knock pin, an adapter for holding the linkage member at its tip, and a rod connected to the rear end of the adapter and arranged along the axis of the linkage member. And
The adapter has an adapter body that is directly connected to the rod at the rear end thereof, and is screwed and fixed to the front surface of the adapter body, and a rear end portion of the linkage member is sandwiched between the adapter body and the linkage member. This is a knock pin pull-out holder characterized by comprising a clamp nut that holds the screw at the tip of the adapter.

  In the holder having the above-described configuration, it is preferable that the linkage member is a bolt that is connected to a knock pin via a screw portion.

  In addition, a spacer for positioning the linkage member with respect to the adapter body and the clamp nut can be provided, and the spacer has a through-hole through which the linkage member is passed and fits inside the clamp nut, and one end of the fuselage. It is composed of a flange that is integrally molded and fits into the recess of the adapter.

  As the positioning knock pin, a knock pin fitted and held on the workpiece or a knock pin used for positioning the workpiece itself can be applied.

  The rod is provided with a weight that can slide along the rod and a stopper that generates an impact when the weight collides.

  The adapter is composed of two parts, an adapter body and a clamp nut. The linkage member is sandwiched and fixed between them, so that even if the linkage member breaks, the linkage member can be completely replaced. Can be pulled out quickly.

Hereinafter, the present invention will be described more specifically with reference to the drawings.
FIG. 1 is an external perspective view of a knock pin pull-out holder according to the present invention, and FIG. 2 is an exploded view thereof.

In the figure, reference numeral 1 denotes a connecting member that has a threaded portion n at the tip and can be connected to the knock pin P through the threaded portion n, 2 denotes an adapter that holds the connecting member 1 at the tip, and 3 denotes a rear end of the adapter 2. A rod connected through the threaded portion n ₁ and having a stopper S at its end, and 4 is a weight that is slidably held by the rod 3 and that pulls the knock pin P by applying an impact to the stopper S.

  The adapter 2 is screwed at the front surface of the adapter body 2a directly connected to the rod 3 at the rear end and the adapter body 2a, and the rear end of the linking member 1 is sandwiched between the adapter body 2a. It consists of a clamp nut 2b for holding the linkage member at the tip of the adapter 2, and a spacer 5 for positioning the linkage member 1 is arranged between them.

  As shown in FIG. 2, the spacer 5 has a through-hole h through which the linking member 1 is passed, and a body 5a that fits inside the clamp nut 2b, and a recess 2c of the adapter 2 that is integrally formed with one end of the body 5a (see FIG. 3). It consists of a flange 5b that fits in.

  In order to pull out a knock pin (positioning pin or the like) fitted to and held by a workpiece or a knock pin or the like for positioning the workpiece in an apparatus for processing the workpiece, the screw portion n of the linkage member 1 is connected to the knock pin P as shown in FIG. After screwing into the threaded portion and connecting them together, the weight 4 is slid along the axial center of the rod 3 so that the weight 4 collides with the stopper S.

  When the weight 4 collides with the stopper S, the knock pin P is easily pulled out of the workpiece by the impact at that time.

  In the pulling operation of the knock pin P, for example, when damage occurs such that the linkage member 1 is broken, the connection state between the adapter body 2a and the clamp nut 2b is released as shown in FIG. Should be done.

  As shown in FIG. 4, in order to replace the linkage member 1, first, the linkage member 1 is inserted through the through hole h of the spacer 5, and its head 1a is abutted against the flange 5b.

  In this state, the body 5a of the spacer 5 is fitted inside the clamp nut 2b, and the clamp nut 2b is screwed into the adapter body 2a as shown in FIG.

  By aligning the axial center of the spacer 5 with the axial center of the rod 3 and the axial center of the clamp nut 2b, the axial center of the linking member 1 and the axial center of the rod 3 are made coincident when the linking member 1 is assembled. Therefore, the centering operation for that purpose is not required, and the knock pin P can be pulled out efficiently.

  The linking member 1 can be easily changed according to the size of the knock pin P, and can cope with any withdrawal of the knock pin P (expansion of application range).

  Although the linkage member 1 shown in FIGS. 1 to 4 is shown as an example in which the screw portion n is provided only at the tip portion, the screw portion n may be provided from the tip to the entire region of the head 1a. This is not a limitation.

  It is possible to provide a holder that can easily replace the linkage member even if the linkage member directly connected to the knock pin is broken.

It is an external appearance perspective view of the holder according to this invention. It is a disassembled perspective view of the holder shown in FIG. It is explanatory drawing in the case of extracting a knock pin using the holder shown in FIG. It is explanatory drawing of the replacement | exchange condition of a connection member.

Explanation of symbols

1 Linking member 2 Adapter
2a Adapter body
2b Clamp nut 3 Rod 4 Weight 5 Spacer
5a fuselage
5b Flange S Stopper P Knock pin

Claims (5)

A linkage member connectable to the positioning knock pin, an adapter that holds the linkage member at its tip, and a rod that is connected to the rear end of the adapter and arranged in a direction along the axis of the linkage member;
The adapter has an adapter body that is directly connected to the rod at the rear end thereof, and is screwed and fixed to the front surface of the adapter body, and a rear end portion of the linkage member is sandwiched between the adapter body and the linkage member. A pull-out holder for a knock pin, characterized by comprising a clamp nut that holds the tip of the adapter at the tip of the adapter.   The knock pin pull-out holder according to claim 1, wherein the linking member is a bolt connected to the knock pin through a screw portion.   The adapter has a spacer for positioning the linkage member with respect to the adapter body and the clamp nut, and the spacer has a through-hole through which the linkage member passes and fits inside the clamp nut, and an adapter formed integrally with one end of the barrel. 3. A knock pin pull-out holder according to claim 1 or 2, comprising a flange fitted into the recess.   The knock pin pull-out holder according to any one of claims 1 to 3, wherein the positioning knock pin is a knock pin fitted to and held by a workpiece or a knock pin used for positioning the workpiece itself.   The knock pin pull-out holder according to any one of claims 1 to 4, wherein the rod has a weight that can slide along the rod and a stopper that generates an impact by collision with the weight.

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