JPH0340440Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a press mold bending roller device.

[Technical background of the invention and its problems]

2. Description of the Related Art Conventionally, a press mold bending roller device shown in FIG. 3 has been used for bending a lead protruding from the side of an envelope constituting a semiconductor device into a predetermined shape. This press mold bending roller device is
A structure in which a large number of rolling bearing type rollers 2 are fitted into a roller shaft 1, both ends of the roller shaft 1 penetrate into a roller holder 4 via a spacer 3, and a stopper 5 is inserted into the protruding end. have. As shown in FIG. 4, the peripheral surface of the rolling bearing type roller 2 is pressed against the lead 7 protruding from the side of the envelope 6 to bend the lead 7.

However, in such a press die bending roller device 10, a gap always occurs between adjacent rolling bearing type rollers 2. For this reason, the lattice burrs of the mold resin generated between the leads 7 when forming the envelope 6 are scattered during the bending process of the leads 7, turn into resin scum, and enter the gaps.
Further, the resin scum enters into the ball receiving portion of the rolling bearing type roller 2. As a result, a thrust load is applied to the rolling bearing type roller 2, and the rolling bearing type roller 2 is damaged. As a result, there is a problem in that lead bending cannot be performed with a bending width within the standard.

Further, as shown in FIG. 5, a press die bending roller device 20 is used in which both ends of a roller shaft 11 are attached to a roller holder 13 via roller bearings 12. This press mold bending roller device 20 is
As shown in FIG. 6, the circumferential surface of the roller shaft 11 is directly pressed against the lead 7 to bend the lead 7. However, since the roller shaft 11 is supported by the roller bearing 12, there is a problem that the device becomes large.

[Purpose of invention]

The purpose of the present invention is to provide a press mold bending roller device that is small in size, prevents damage to rolling bearing type rollers due to resin scum, and is capable of easily bending leads to a predetermined bending width. It is something.

[Summary of the idea]

The present invention is small in size and prevents damage to the rolling bearing type rollers due to resin scum by providing a covering cylindrical body that covers a plurality of rolling bearing type rollers fitted in the roller shaft in a state of sliding contact. With. This is a press mold bending roller device that can easily bend leads to a predetermined bending width.

[Example of idea]

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 31 in FIG. 1 is a roller shaft into which a number of rolling bearing type rollers 32 are fitted. A covering cylindrical body 33 is inserted into the outer peripheral portion of the rolling bearing type roller 32 so that its inner peripheral surface is in sliding contact with the outer peripheral surface of the rolling bearing type roller 32.
Both ends of the roller shaft 31 are inserted into a roller holder 35 via a spacer 34. A stopper 36 is attached to a portion of the roller shaft 31 that protrudes from the roller holder 35. In other words, the coating cylinder 3 is
3 can be rotated freely.

As shown in FIG. 2, the press mold bending roller device 40 configured in this way has
A lead 38 whose peripheral surface protrudes from the side of the envelope 37
The bending process of the lead 38 is performed. Since all the rolling bearing type rollers 32 are covered with the covering cylindrical body 33, the lead 3
It is possible to prevent resin scum from entering between the rolling bearing type rollers 32 during the bending process in step 8. As a result, the rolling bearing type roller 32
It is possible to prevent resin scum from entering the ball receiving portion of the ball. Therefore, no thrust load is generated, the rolling bearing type roller 32 is prevented from being damaged, and the lead 38 can be easily bent to a bending width within a predetermined standard. Furthermore, since roller bearings are not used to hold the roller shaft 31, the device can be made smaller.

[Effect of idea]

As explained above, the press mold bending roller device according to the present invention is small, prevents damage to the rolling bearing type roller due to resin scum, and can easily perform lead bending with a predetermined bending width. It is something.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a schematic configuration of an embodiment of the present invention, FIG. 2 is an explanatory diagram showing the operation of a press die bending roller device of the same embodiment, and FIGS. 3 and 5 are: FIGS. 4 and 6 are explanatory diagrams showing a schematic configuration of a conventional press mold bending roller device, and FIGS. 4 and 6 are explanatory diagrams showing the operation of the conventional press mold bending roller device. 31... Roller shaft, 32... Rolling bearing type roller, 33... Covering cylindrical body, 34... Spacer, 35... Roller holder, 36... Stopper,
37... Envelope, 38... Lead, 40 ... Press mold bending roller device.

Claims (1)

[Scope of utility model registration request] a plurality of rolling bearing type rollers rotatably fitted into a roller shaft; a covering cylindrical body covering the rolling bearing type roller so that the outer peripheral surface of the rolling bearing type roller is in sliding contact with the inner peripheral surface; A press mold bending roller device comprising: a roller holder that holds both ends of the roller shaft.