JPH0115505Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is used to fix workpieces, etc.
It concerns a chain vise.

(Conventional technology) When an item is hugged and fixed with a chain, the flexibility of the chain follows the shape of the item.
Because it can be firmly fixed, it is often used as a vise in machine tools, etc. In such a conventional chain vise using a leaf chain, one end of the leaf chain is fixed to the vise body, and a workpiece or the like is held and fixed by pulling the other end.

(Problem to be solved by the invention) In the conventional chain vise as described above, one end of the chain is fixed, so the chain is formed in an almost triangular shape connecting the fixed point of the chain, the tension point, and the apex of the object to be fixed. Since the workpiece is fixed with tension, if the workpiece is large, the apex of the triangle formed by the chain will be high. Sufficient fixation can be achieved by contacting a long outer circumference, but if the chain has a small diameter, the apex of the almost triangular shape formed by the chain becomes lower, so the length of the chain in contact with the outer circumference of the object to be fixed becomes shorter, resulting in insufficient fixation. It was hot.

The present invention eliminates these conventional drawbacks and makes it possible to achieve sufficient tightening that closely follows the shape of the chain vise, which is a characteristic feature of the chain vise.

(Means for solving the problem) That is, a leaf chain is provided with a long hole in the longitudinal direction on the top surface of the main body, and stoppers are provided upright on both sides near the front end, and joint pins are protruded from the long hole on both sides. The articulating pin at one end is hooked to the lower side of the elongated hole and engaged in a movable manner, and is further interposed between the bifurcated legs formed at the tip of the main body, supported by the bifurcated legs, and perpendicular to the elongated hole. A chain trigger with a hook-shaped side is supported on a support shaft horizontally in the direction so that one side of the hook-shaped side faces forward and the other side faces downward, allowing the corner part to pivot freely. , bifurcate the front end of this chain trigger fitting and sandwich the leaf chain,
A recessed engagement part is provided on the lower surface of the bifurcation so that the joint pin can fit into it, and the lower end of the chain trigger is also bifurcated, and a female screw piece is provided with a female thread passing through the center of the lengthwise direction of the cylinder. The two legs are loosely fitted through the two legs in a direction parallel to the axis, and a male threaded rod on the back side of the main body, parallel to the long hole and rotatably supported by the main body, is screwed into this female threaded piece. This is a chain vise with a handle attached to the rear end of this male threaded rod.

(Function) This chain vise is used when an object to be fixed is placed on the top surface of the main body, placed against the stopper, a leaf chain is hung over the object to be fixed, and the leaf chain is tensioned at the engagement part on the lower side of the tip of the chain trigger. By holding the handle and turning the male threaded rod, the chain trigger rotates and pulls the leaf chain, thereby fixing the object to be fixed.

At this time, the end of the leaf chain that engages with the long hole can move along the long hole depending on the size of the object to be fixed, so the leaf chain is in the best condition with the shortest working length. It can be tightened.

(Example) Hereinafter, embodiments of the present invention will be described based on the drawings.

Reference numeral 1 denotes a main body, and a long hole 2 in the longitudinal direction is provided at the center of the upper surface in the width direction, and an expanded portion 2a for fitting the leaf chain 3 is formed at one end of the long hole 2.

The leaf chain 3 has articulation pins 3a protruding from both sides of each joint, and the articulation pin 3a at one end is hooked onto the lower side of the elongated hole 2 and engaged so that it can move freely along the elongated hole.

4 is a stopper, which has two round rods planted upright on both sides near the top end of the main body 1.
The object to be fixed 10 to be placed on the top surface is positioned. This stopper 4 is not limited to a round bar, and can be constructed in various ways, such as being formed integrally with the main body 1 by casting.

5 is a chain trigger with hook-shaped sides;
A hook-shaped support shaft 6 is interposed between the bifurcated legs 1a, 1a formed at the tip of the main body 1, supported by the bifurcated legs 1a, 1a, and installed horizontally in a direction perpendicular to the elongated hole 2. The corner part of the chain trigger 5 is pivotally supported so that one side faces forward and the other side faces downward.
The front end of this chain trigger 5 is bifurcated,
A recessed engaging portion 5a is provided on the lower surface of the bifurcated fork to sandwich the leaf chain 3, so that the joint pin 3a fits therein.
With the leaf chain 3 hanging forward hanging from the object 10 in tension, the joint pin 3a engages the engaging portion 5a.
is engaged with. The lower end of the chain trigger 5 is also bifurcated, and a female thread 7a is provided in the center of the lengthwise direction of the cylinder, and a female screw piece 7 is inserted into the spindle into the loose fitting hole 5a, which is slightly elongated in the vertical direction in both legs of the bifurcated body. It is loosely fitted in the direction parallel to 6.

Reference numeral 8 denotes a male threaded rod, which is placed on the back side of the main body 1 and parallel to the long hole 2.The male thread 8a at the tip is screwed into the female thread 7a of the female threaded piece 7, and the near rear end is connected to the rear wall of the main body 1. A handle 9 is attached to the rear end of the main body 1 projecting from the rear wall.

When this handle 9 is turned, the female screw piece 7 is pulled rearward by the rotation of the male screw rod 8, and the chain trigger 5 is moved around the spindle 6 so that the engaging portion 5a pulls the joint pin 3a of the leaf chain 3 into the first position. The leaf chain 3 is pulled in the direction of the arrow in the figure, and the leaf chain 3 hugs the object to be fixed 10 and firmly fixes it.

To release the fixation, turn the handle 9 in the opposite direction to the tightening direction. This will immediately loosen the engagement between the chain trigger 5 and the leaf chain 3. If you remove the joint pin 3a from the engagement part 5a, the leaf chain will be released. 3 can be removed from the object 10 to be fixed.

(Effect of the invention) As explained above, this invention
Regardless of the size or shape, we provide a chain vise that allows the chain to be in contact with the object to be fixed for a long time and tighten it in an ideal state, so it can be firmly and stably fixed, and the operation is simple and quick. It is possible.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal side view showing an embodiment of the proposed chain vise, Fig. 2 is a plan view, Fig. 3 is a view of Fig. 1 viewed in the direction of arrow B, and Fig. 4 is an enlarged view of the chain trigger. The perspective view and FIG. 5 are an enlarged sectional view taken along the line A--A in FIG. 1. 1... Main body, 1a... Bifurcated leg, 2... Long hole,
2a... Extension part, 3... Leaf chain, 3a...
... Joint pin, 4... Stopper, 5... Chain trigger, 5a... Engaging portion, 5b... Loose fitting hole, 6...
...Spindle, 7...Female thread piece, 7a...Female thread, 8...
...Male thread rod, 8a...Male thread, 9...Handle,
10...Object to be fixed.

Claims (1)

[Scope of utility model registration request] In addition to providing a long hole in the front and back direction on the top of the main body,
Stoppers for positioning the workpiece are provided upright on both sides of the front end, and a joint pin at one end of a leaf chain with joint pins protruding from both sides is movably engaged in the long hole by hanging on the lower side of the long hole. Furthermore, between the bifurcated legs formed at the center of the tip of the main body, a chain trigger having a hook-shaped side surface is supported rotatably about a direction perpendicular to the elongated hole, and the chain trigger is rotatably supported. A chain vice, characterized in that the tip is an engaging part that engages the articulation pin of the leaf chain, and the lower end is moved by a screw to rotate the chain trigger. .