JPH0633010B2 - Binding clamp device for bookbinding machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a signature clamp device for a bookbinding machine that holds and moves a signature.

(Prior Art) Conventionally known signature clamps of this type are of a type in which a movable holding plate moves back and forth with respect to a fixed holding plate by a cam or a push actuator to open and close the clamp. However, there was no type in which the movable holding plate pivoted with a hinge arm.

(Problems to be solved by the invention) Therefore, for example, it is difficult to always perform stable and accurate clamp clamping and release of the clamp clamping in a continuous work such as continuous circulation operation, and it is easy to cause a clamp trouble or a failure. There was a fear.

In addition, no special mechanical device is applied to the clamping force when the clamp grips the signature, and there is a problem with the stable, accurate and rational clamping of the signature.

(Means for Solving Problems) The present invention has been made to solve the above problems, and is configured as follows.

That is, according to the present invention, a rotatable pivot shaft in the upper part of the main body in which an inclining follower shaft engaged with an opening cam is fixed, and an upper bending plate tip is pivotally attached to the pivot shaft, and a movable crank shaft is provided at a lower end portion. The pinion shaft of the pinion that engages with the fan-shaped internal gear fixed to the pivot shaft is loosely fitted to the plate, and the pinion shaft of the pinion is supported by the upper bent plate part. A plate cam having an inner convex surface and an outer convex surface of an arc centered on the pivot, and the plate cam at one end, and the other end provided with an engaging rotor is fixed to the pinion shaft. An arm rod, a tension spring tensioned between the tip of the projecting rod fixed to the pinion shaft and the support shaft, an arm plate fixed to the support shaft, and a rod having both ends pivotally connected to the upper part of the main body. The movable clamp plate is almost parallel to the fixed clamp plate when the clamp is opened and closed. Powerful clamping pressure when closing the movable clamp with the swinging movement in the state is signature clamping device binding machine, characterized in that the mechanically activated.

An embodiment of the device of the present invention will be described below in detail with reference to the drawings.

First, a clamp body 1 having a vertical fixed clamp plate 2 is connected to a conveyor chain while being supported so as not to move up and down and forward and backward, and is rotated along a track by rotationally driving the endless conveyor chain. It is like this. Next, 3 is a pivot shaft which is engaged with the upper opening cam 22 and in which the tiltable follower shaft 4 is fixed, and the pivot shaft 3 is rotatably installed on the upper portion 1a of the clamp body 1. 5
Is a cam rotor at the upper end of the follower shaft 4. 6 is the upper part 1 of the main body
It is a plate cam that is fixed to a and has an inner convex surface portion 6a and an outer convex surface portion 6b of an arc centered on the pivot 3 at the lower end branch point P as a boundary. Further, 7 is a fan shape in which the tip end of the upper bending plate portion 7a is pivotally attached to the pivot shaft 3 and the support shaft 9 integral with the movable clamp 8 is loosely fitted to the tip end portion of the lower bending plate portion 7b and fixed to the pivot shaft 3. The pinion shaft 10 of the pinion 11 that meshes with the internal bevel gear of the internal gear 12 is an arm that is supported by the bent portion of the upper bent plate portion 7a. Reference numeral 13 is an arm rod having a rotator 14 for engaging with the plate cam 6 at one end, and the other end is an arm rod fixed to the pinion shaft 10 at the other end, and 15 is a projection rod having a base end fixed to the pinion shaft 10. Is. A tension spring 17 is tensioned between the pin 16 at the tip of the projecting rod 15 and the support shaft 9 of the movable clamp plate 8. Further, an arm plate 18 having one end fixed to the support shaft 9 and an expandable / contractible rod 19 having both ends pivotally connected to the upper body 1a by pivots 21 and 20 are provided. Further, according to the present invention, the movable clamp plate 8 is swing-moved in a state substantially parallel to the fixed clamp plate 2 when the clamp is opened and closed, and a strong holding pressure is dynamically urged when the movable clamp plate 8 is closed. It is composed.

(Operation) In FIG. 1, the follower shaft 4 rotates in the direction of arrow a by the opening cam 22 with which the cam rotor 5 is in contact with the movement of the clamp body 1. Then, the pivot 3 rotates in the direction of arrow b by the rotation angle of the follower shaft 4. Then, the rotation of the pivot shaft 3 causes the fan-shaped internal gear 12 to rotate in the direction of arrow c, and the pinion 1 that meshes with the internal spiral gear 12a.
The pinion shaft 10 of No. 1 rotates by being amplified in the direction of arrow e. The rotation of the pinion shaft 10 causes the arm rod 13 to rotate in the direction of the arrow f, so that the trochanter 14 rolls on the inner convex surface portion 6a of the plate cam 6 and moves to the branch point P as shown in FIG. At the same time, the tension spring 17 is pulled by the rotation of the projecting rod 15 in the direction of the arrow g. At this time, since the pinion shaft 10 is displaced by being restricted by the plate cam 6, the arm 7 rotates about the pivot shaft 3 in the arrow h direction. At this time, since the movable clamp plate 8 would normally swing the arm 7 around the pivot 3,
Although the fixed clamp plate 2 is tilted away from the contact with the fixed clamp plate 2, the upper end of the rod 19 is pivotally attached to the main body upper portion 1a, and therefore acts to prevent the arm plate 18 from rotating in the arrow i direction. That is, the movable clamp plate 8 is intervened by the interposition of the rod 19 which constantly holds the interval length between the arm plate 18 integrated with the movable clamp plate 8 and the upper body 1a.
Moves to the position shown in FIG. 2 while maintaining the parallel state with the fixed clamp plate 2. (Note that arrow d is pinion 1
The rotation direction is 1. 2) From the state shown in FIG. 2, when the follower shaft 4 further rotates in the direction of the arrow a and the trochanter 14 moves from the branch point P of the plate cam 6 to the outer convex surface portion 6b, the outer convex surface portion 6b. Is a circular arc centering on the pivot 3, the pinion shaft 11 does not rotate even if the fan-shaped internal gear 12 rotates, but moves integrally, that is, the arm 7 is in a free state and swings upward. As shown in FIG. 3, the movable clamp plate 8 moves to the fully open position.

Next, the action when the movable clamp plate 8 is closed from the fully opened state shown in FIG. 3 to the state shown in FIG.
When the trochanter 14 shown in FIG. 2 moves from the position located at the branch point P of the plate cam 6 to the inner convex surface portion 6a and rolls, the restoring force of the tension spring 17 causes the pinion shaft 10 to be a fulcrum and a rolling point. With the lever 14 as the point of action, the arm 7 is amplified by the lever principle and because the pinion shaft 10 rotates about the pivot 3, the arm 7 is strong in the direction in which the movable clamp plate 8 is pressed against the fixed clamp plate 2 side. The movable clamp plate 8 can strongly clamp the signature between the movable clamp plate 8 and the fixed clamp plate 2.

(Effect of the Invention) Since the signature clamp device of the present invention is a rotating arm type clamp device, and the movable clamp plate is swing-moved in a state substantially parallel to the fixed clamp plate when the clamp is opened and closed, bookbinding Stable and accurate clamp clamping and release of the clamp clamping can be performed easily and continuously during continuous work on the machine, and there is an effect that a signature clamping trouble or a malfunction due to malfunction does not occur.

In addition, when the movable clamp plate is closed, a strong clamping force is dynamically urged, so a stable and powerful clamping clamp for the signature is guaranteed, and the function of this type of signature clamping device is guaranteed. There is an excellent effect that can be remarkably improved.

[Brief description of drawings]

The drawings show an embodiment of the signature clamping device of the present invention. Fig. 1 is a front view of the clamp fully closed, Fig. 2 is a front view of the state when the signature is held, and Fig. 3 is the clamp fully opened. FIG. 1 ... Clamp main body, 1a ... Upper part of the main body, 2 ... Fixed clamp plate, 3 ... Pivot shaft, 4 ... Follower shaft, 5 ... Cam rotor, 6 ... Plate cam, 6a ... Inner convex surface part , 6b ... Outer convex surface portion, 7 ... Arm, 7a ... Upper bent plate portion, 7b ...
Lower bent plate, 8 ... Movable clamp plate, 9 ... Spindle, 10
...... Pinion shaft, 11 ...... Pinion, 12 ...... Fan internal gear, 12 a ...... Internal gear, 13 ...... arm rod, 14 ...... Rotor, 15 ...... Push rod, 16 ...... Pin, 17 ...... Tension spring,
18 ... Arm plate, 19 ... Rod, 20, 21 ... Axis,
22 ... Opening gum, P ... Branching point, a, ... h ...
… Arrows,

Claims (1)

[Claims] Claim: What is claimed is: 1. A rotatable crankshaft at the upper part of the main body, in which a tiltable follower shaft is fixedly engaged with an opening cam, and a tip end of an upper bending plate is pivotally attached to the pivot shaft, and a movable crank is provided at the lower end. The pinion shaft of the pinion that engages with the fan-shaped internal gear fixed to the pivot shaft is loosely fitted to the plate, and the pinion shaft of the pinion is supported by the upper bent plate part. With a plate cam having an inner convex surface and an outer convex surface of an arc centered on the pivot, and an arm fixed at one end with a pinion shaft and having a rotator engaging with the plate cam. A rod, a tension spring tensioned between the tip of the protruding rod fixed to the pinion shaft and the support shaft, an arm plate fixed to the support shaft, and a rod having both ends pivotally connected to the upper part of the main body. When the clamp is opened and closed, the movable clamp plate is swung in a state of being almost parallel to the fixed clamp plate. Signature clamping device of the bookbinding machine strong clamping pressure when the movable clamping plate is closed is characterized in that it is dynamic biasing together are grayed moved.