Metal working – Plural diverse manufacturing apparatus including means for... – Binding or covering and cutting
Reexamination Certificate
2001-04-30
2003-02-04
Wellington, A. L. (Department: 3722)
Metal working
Plural diverse manufacturing apparatus including means for...
Binding or covering and cutting
C029S564100, C029S753000, C029S748000, C029S747000, C029S857000, C081S009510
Reexamination Certificate
active
06513215
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a technical field of an auto ID machine (automatic insulation displacement machine) for pushing electric wires into slots of contacts in an insulation displacement connector and for inserting cores of the electric wires to the slots by insulation displacement. Particularly, the present invention relates to improvement of an insulation displacement stand for retaining the insulation displacement connector.
2. Description of the Related Art
Generally, an auto ID machine (that is, automatic insulation displacement machine) includes an insulation displacement stand for retaining an insulation displacement connector, a movable unit moving back and forth relative to the insulation displacement stand, and a punch attached to the movable unit. On the other hand, the insulation displacement connector includes a substantially box-like connector housing, and contacts which are inserted into cavities of the connector housing and which have slots in the upper portions of the contacts for inserting cores of electric wires by insulation displacement. Electric wire insertion holes communicating with the slots of the contacts are opened in the upper surface of the connector housing. The lower surface is used as a pressure-receiving surface for receiving a load by insulation displacement. While the insulation displacement connector is retained in the insulation displacement stand, end portions of the electric wires are put on the electric wire insertion holes and pressed by the punch of the movable unit so as to be pushed into the slots. In this manner, insulation displacement is performed (for example, see JP-A-8-235945).
The insulation displacement stand has a horizontal surface for receiving the pressure-receiving surface of the connector housing of the insulation displacement connector, and a vertical surface for receiving the front or rear surface of the connector housing. An insulation displacement load received on the pressure-receiving surface of the connector housing is caught by the horizontal surface. Moreover, the connector housing is positioned in the front-rear direction by being pushed against the vertical surface, for example, by a braking unit provided separately. A pressing surface protruding slightly like a hood from the vertical surface so as to engage with the upper surface of the connector housing is formed in the insulation displacement stand. The pressing surface prevents the connector housing from floating up from the insulation displacement stand. The horizontal surface, the vertical surface and the retaining surface are formed up to the left and right end surfaces of the insulation displacement stand. Therefore, in the insulation displacement stand, a groove shaped like a substantially sideways U-figure in section is formed by the horizontal surface, the vertical surface and the retaining surface. The insulation displacement connector to which the electric wires have been not inserted yet with insulation displacement is inserted from one end of the groove and slid in the right-left direction. Further, the insulation displacement connector is decelerated by the braking unit so as to be positioned in a position for insulation displacement. When the movable unit is then moved back and forth, the electric wires are connected to the insulation displacement connector with insulation displacement. After the completion of insulation displacement, the insulation displacement connector is pulled in a direction of extending of the electric wires, so that the insulation displacement connector is released from the insulation displacement stand.
Incidentally, Japanese Patent Application 2000-95953 which has been filed by the Applicant of the present invention discloses an insulation displacement connector which can be connected with electric wires with insulation displacement by means of an auto ID machine even if the insulation displacement connector is provided with a locking portion. The insulation displacement connector includes a substantially box-like connector housing and contacts. The connector housing has cavities piercing the connector housing, for example, in the front-rear direction, and each of the contacts has a connection portion at one end and slots for connecting cores of electric wires in an upper or lower surface on the other end side with insulation displacement. The contacts are inserted into the cavities of the connector housing respectively. Electric wire insertion holes communicating with the slots are opened in the upper or lower surface of the connector housing. A surface on a side vertically opposite to the upper or lower surface of the connector housing is used as a pressure-receiving surface for receiving a load by insulation displacement. A locking portion to be engaged with a partner connector is provided on the contact connection portion side in the pressure-receiving surface so as to protrude outward.
To retain such an insulation displacement connector in the auto ID machine, a recess portion for making the locking portion escape must be formed in the horizontal surface of the insulation displacement stand. However, if it is formed so, there is still a problem that, when the insulation displacement connector is released from the insulation displacement stand, the locking portion is hooked by the recess portion so that the insulation displacement connector cannot depart from the insulation displacement stand.
SUMMARY OF THE INVENTION
The present invention was achieved by paying attention to this respect and an object thereof is to provide an insulation displacement stand which enables smooth insulation displacement and release of an insulation displacement connector including a locking portion even in the case where the insulation displacement stand is attached to a conventional auto ID machine, and further to provide an auto ID machine having such an insulation displacement stand.
In order to achieve the above object, according to a first aspect of the invention, there is provided an insulation displacement stand to be attached to an automatic insulation displacement machine for connecting cores of electric wires to an insulation displacement connector with insulation displacement, the insulation displacement connector including a substantially box-like connector housing and contacts, the connector housing having cavities piercing the connector housing in a front-rear direction, the contacts each having a connection portion at one end and slots for connecting corresponding one of the cores of the electric wires with insulation displacement in an upper or lower surface on the other end side, the contacts being inserted in the cavities of the connector housing, the connector housing having electric wire insertion holes opened in an upper or lower surface of the connector housing so as to communicate with the slots, and a surface vertically opposite to the upper or lower surface to be used as a pressure-receiving surface for receiving an insulation displacement load, a locking portion to be engaged with a partner connector being provided on a contact connection portion side of the pressure-receiving surface so as to protrude outward therefrom, wherein the insulation displacement stand includes: a fixed rack in which a first surface for receiving the pressure-receiving surface of the connector housing and a second surface which escapes from the locking portion are formed with a difference in level in a heightwise direction and up to at least one side end surface on a side where the insulation displacement connectors are charged; a movable rack in which a third surface for receiving a connection surface having contact connection portions opened in the connector housing and a fourth surface for receiving the contact connection portion side in a surface having electric wire insertion holes opened in the connector housing are formed up to at least one side end surface on a side where the insulation displacement connectors are charged; and a braking unit provided in the f
J.S.T. Mfg. Co. Ltd.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ross Dana
Wellington A. L.
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