JPS633040B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a clamping tool for reliably clamping thin plate-shaped objects such as printed circuit boards one by one in surface treatment equipment. be.

[Prior Art and its Problems] Conventionally, when performing a surface treatment such as nickel plating on the surface of a printed circuit board, the board terminal portions are held one by one using a holding tool such as a clip. However, the terminal portion formed at one end edge of this printed circuit board is small and cannot conduct electricity unless it is accurately clamped. Furthermore, when a large printed circuit board is clamped and transported in a hanging manner, if only the terminal portion of the board is clamped, the board vibrates, causing the board to shift from its correct clamping position, and sometimes to fall.

[Means for solving problems]

The present invention has been made in view of this, and includes two or more fixed clamping pieces hanging down from a frame that can be lifted and conveyed, and a movable clamping piece facing the fixed clamping pieces. , and opposing fixed
Both movable clamping pieces are pivoted around a shaft, and the spring pressure attached to this shaft always clamps the thin plate-shaped workpiece between the lower ends of both clamping pieces with the required pressure, and also holds it fixedly. The retaining rods are pivoted on both outside sides of the piece so that it always narrows inward due to the spring force.
An attachment is provided protruding from the movable clamping piece, and when the movable clamping piece receives an external force and the lower end of the clamping surface is released, this attachment presses a part of the clamping piece, and the two parts are pressed together against the spring pressure. A pair of holding rods protrudes downward from the lower ends of the holding rods, and the lower end sides of the pair of holding rods are opened to hold both ends of the thin plate-shaped workpiece, and together with the holding by the holding pieces, the workpiece can be held without swinging. To provide a clamping tool that can be securely clamped and transported.

〔Example〕

The present invention will be described in detail below based on embodiments shown in the drawings.

In the figure, 1 is a fixed clamping piece that is fixed to the frame F. Two clamping pieces are usually arranged facing each other at a predetermined pitch so that they can clamp the terminal part formed on the edge of the printed circuit board, and another clamping piece is fixed in the middle. A clamping piece is provided, and the lower part of each fixed clamping piece is formed so as to be able to securely clamp the printed circuit board. A movable clamping piece 2 is disposed facing each of the fixed clamping pieces 1, and a shaft 3 is inserted between brackets 1a and 2a protruding from the two opposing clamping pieces 1 and 2, respectively. 1 and 2 are made to be swingable, that is, to open and close between the lower end faces of both pieces, and a spring 4 is attached to this shaft 3, and the lower end faces of both the holding pieces are closed and covered by the spring pressure. It is designed to hold the material to be processed. Then, a horizontal bar 5 is hung horizontally and fixed by welding or other means so that the fixed clamping pieces 1 arranged in parallel are integrated, and a horizontal bar 6 is also horizontally suspended between the movable clamping pieces 2, which are opposite to this, so that the fixed clamping pieces 1 are integrated. It looks like a single clip. In addition, a shaft 7 is provided on both outside sides of the fixed clamping piece 1 or at the outer end of the horizontal bar 5, and the upper end of the holding rod 8, which protrudes further downward from the lower part of the fixed clamping piece, is attached to the shaft 7. By pivoting, the two holding rods 8, 8 are opposed to each other, and the intermediate portions on both sides of the printed circuit board held between the two holding pieces are held. Further, a tension spring 9 is attached between the horizontal beam 5 and the holding rod 8 so that the holding rod 8 is pressed against both side surfaces of the printed circuit board. Attachments 10 are provided protruding outwardly on both sides of the movable clamping piece.
0 is brought into contact with a part of the holding rod, and the tip of the attachment is inclined. When the holding rod is pressed, the lower end of the holding rod opens, that is, expands outward, in response to this pressing force. At this time, the rotating cylinder 11 may be fitted to the holding rod so that the portion of the attachment that contacts the holding rod can slide smoothly. The lower end of the holding rod 8 is V-shaped so that it can easily hold the outer edge of the printed circuit board. A stopper is protruding from the bottom of the movable clamping piece or the fixed clamping piece, and when a printed circuit board is to be clamped between both clamping pieces, the tip of the printed circuit board stops at a fixed position, and this ensures that the terminal part is held securely. Hold it in place.

[Effect]

In order to clamp a printed circuit board with the clamping tool configured as described above, one or both of the fixed clamping piece and the movable clamping piece can be pressed against the spring by pressing with a cylinder or other pressing tool. The lower part of the clamping piece is released and opened. When the movable clamping piece opens, the holding rod is pushed by the inclined surface at the tip of the attachment, and the lower part of the holding rod is pushed out against the force of the spring. In this state, after the printed circuit board is inserted between the two clamping pieces that open on the terminal side, when the pressing force from the cylinder, etc. on the upper part of the movable clamping piece is released, the clamping pieces 1 and 2 close due to the restoring force of the spring 4 and print. At the same time as the board is clamped, the pressing force of the holding lever by the attachment is released, and the lower end of the holding lever is compressed by the action of the spring 9 to hold both outer sides of the printed circuit board. This prevents shaking even during suspension transportation and allows accurate clamping and suspension.

〔Effect of the invention〕

According to the present invention, holding rods are provided on both sides of a holding tool which is configured to hold a printed circuit board with a movable holding piece and a fixed holding piece, and which protrude downward from the holding pieces. This is an attachment with a rod protruding from a movable holding piece, and when the movable holding piece opens, the holding rod expands under pressure, and when the movable holding piece closes, the holding rod is also closed by spring pressure to hold the printed circuit board. Since it is held by a clamping piece and both sides are held by a holding rod, it is possible to carry out accurate clamping and conveyance without shaking even during suspended conveyance, and furthermore, it has the advantage of being able to prevent failure to conduct electricity. has.

[Brief explanation of the drawing]

Fig. 1 is an external view, Fig. 2 is a front view, Fig. 3 is a side view, and Fig. 4 is an explanatory view of clamping. 1 is a fixed clamping piece, 2 is a movable clamping piece, 3 and 7 are shafts, 4 is a spring, 5 and 6 are horizontal bars, 8 is a holding rod, 9 is a tension spring, and 10 is an attachment.

Claims (1)

[Claims] 1 Two or three or more fixed clamping pieces are installed vertically in parallel on a frame that can be lifted and conveyed, and a movable clamping piece is arranged opposite to the fixed clamping pieces, and the opposing fixed and movable clamping pieces are arranged vertically in parallel. The two clamping pieces are pivoted around a shaft, and the thin plate-shaped workpiece is always clamped at the required pressure between the lower ends of the two clamping pieces by the spring pressure attached to this shaft, and they are fixed in parallel. A pair of holding rods for holding both ends of a thin plate-shaped workpiece are pivotally attached to both ends of a horizontal rod suspended between the holding pieces,
The lower part of the holding rod is made to protrude below the lower part of the clamping piece, and the holding rod is equipped with a spring that always contracts inward due to spring force, and the movable clamping piece is provided with a spring that protrudes laterally. A holding tool for holding a thin plate-shaped workpiece, which has a protruding attachment, the tip of the attachment is inclined, and the inclined part is pressably brought into contact with a rotary cylinder fitted to a holding rod.