JPH08323538A - Chain vice device - Google Patents

Abstract

(57) [Abstract] [Purpose] Regardless of the size of the material, the chain is always kept at an appropriate length, and the chain vice device can be tensioned and loosened in a short time, but has a simple structure and is inexpensive. Is to provide. [Structure] Pulley 8, worm wheel, inside base 1
A vice shaft 7 having a screw holder is rotatably provided, a chain 11 is wound around a pulley 8, and a rotational force acts on the pulley 8 by a spiral spring. Pull out the chain 11 and attach the chain handle 12 to the chain hook 19
When the screw is rotated while pressing it in the axial direction, the pulley 8 rotates via the worm wheel, and the extra chain 11 is wound around the pulley 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chain vise device for fixing a material to a base by a chain.

[0002]

2. Description of the Related Art In a conventional chain vise device, as shown in FIGS. 8 and 9, one end of a chain 11 is fixed to a base 1, a chain handle 12 is attached to the other end, and the other end of the chain handle 12 is held. After hooking the chain 11 on the material 6, lock the chain 11 on the chain hook 19,
The screw 14 is rotated by the knob 17, and the tip of the screw 14 presses the chain hook 19 to rotate the chain hook 19 counterclockwise, thereby pulling the chain 11 downward and fixing the material 6 to the base 1.

Since the length of the chain 11 is such that the maximum material 6 that can be cut is fixed, as shown in FIG. 9, when fixing a small material 6, the chain 11 is left over and the chain 11 is left on the ground. It had been thrown into. For this reason, the chains 11 are overlapped and dirty, and it is difficult to tighten and loosen the knob 17. Also, chain 11 to chain hook 1
Since the chain 11 is loose when attached to the chain 9, when fixing the material 6 with the chain 11, the chain hook 19
Therefore, the number of rotations for tightening the knob 17 increases. Further, as shown in FIG. 10, when the material 6 is removed and the chain 11 is placed on the base 1,
Since the chains 11 are long, they may overlap with each other, and it takes time to put the chains 11 in and out.

As a solution to this problem, there is JP-A-6-246564. This is because the first chain middle part, the second chain middle part, the rotation stopping means, and the biasing means for pulling the second chain middle part normally are provided inside the base, and the chain is hung on the member, thereby The chain was pulled in, and the chain was pulled out from the inside of the base by the amount necessary to fix the material, and the material was fixed to the upper surface of the base with an appropriate chain length without slack.

[0005]

However, the above structure requires the first and second chain intermediate portions, the space for storing the chain drawn around by the rotation stopping means, and the space for the biasing means for pulling the chain intermediate portion. Therefore, the whole base becomes large. Further, since the chain is drawn inside the base, the chain is made up of many parts and has a complicated structure, resulting in an expensive product.

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, and to keep the chain always held at an appropriate length regardless of the size of the material, and to perform the tensioning and loosening operations of the chain in a short time, while simplifying the operation. And to provide a chain vice device having an inexpensive structure.

[0007]

The above object is to provide a chain vise apparatus for fixing a material to a base by a chain, the vise having a pulley, a worm wheel and a screw holder for fixing one end of the chain in the base and winding the chain. A shaft is rotatably installed, a spiral spring that urges the pulley to rotate in the direction of rotation is provided at one end of the vise shaft, and a chain hook that locks the other end of the chain is provided at the base. A screw that is locked is provided on the base so as to be slidable in the axial direction, and when the screw is pushed in in the axial direction, the worm portion formed in the screw meshes with the worm wheel, and the screw is pushed out in the axial direction. This is achieved by providing a spring on the outer circumference of the screw.

[0008]

In the chain vise device constructed as described above, the restoring force of the spiral spring constantly acts to wind the chain around the pulley. For this reason, the chain is almost in a loose state only by attaching the chain to the chain hook. When the chain is removed from the chain hook, the chain is wound around the pulley. To tighten the material, push the screw in the axial direction and rotate the screw clockwise to tighten it. When the screw is pushed in the axial direction, the screw holder rotates around the vise shaft, and as a result,
The worm part of the screw meshes with the worm wheel. When the screw is rotated in that state, the worm wheel rotates, the pulley is rotated via the vice shaft, and the chain is further wound. Also, due to the rotation of the screw,
A force is applied from the screw to the screw holder. This pressing force causes the screw holder to rotate around the vise shaft, and presses the worm portion of the screw against the worm wheel.

To loosen the tightening of the material, the screw is rotated in the reverse direction. When the screw is rotated in the reverse direction, the engagement between the worm part of the screw and the worm wheel becomes loose,
Due to the restoring force of the spring attached to the outer circumference of the screw,
Pull the screw in the axial direction and rotate the screw holder around the vice shaft in the opposite direction to the tightening direction to move the screw worm part away from the worm wheel and disengage it.

[0010]

Embodiments of the present invention will be described with reference to FIGS. FIG. 1 is a front view of a horizontal band saw board showing an embodiment of the present invention, FIG. 2 is a view of the chain vise portion viewed from the direction A of FIG. 1, and FIG. 3 is a sectional view taken along line BB of FIG. Figure, Figure 4, Figure 5 is Figure 2
6 is a sectional view taken along the line D-D of FIG. 2, FIG. 6 is a state diagram when tightening the material, and FIG. 7 is a state diagram when the material is removed. Is. In this example,
A case where a chain vise device is attached to a horizontal band saw will be described as an example.

In FIG. 1, a rear end of a base 1 is provided with a frame 2 pivotally supported in a vertical direction, and a driving side saw wheel 3, a driven side saw wheel 4 and a saw wheel 4 are provided in the frame 2. 3,
A band saw blade 5 stretched between the four is provided.

At the front portion of the base 1, a base surface 1a on which the material 6 is placed is provided. A vice shaft 7 is rotatably provided inside the front part of the base 1, and as shown in FIG. 3, a worm wheel 9 is fixed to the center of the vice shaft 7 and pulleys 8 and 8 are fixed to both sides of the worm wheel 9, which will be described later. A pulley groove 8a for winding the chain is formed. One end of the chain 11 is fixed to each pulley 8, and from there, the chain 1
After being wound around a pulley 8, the wire 1 is projected onto the base 1 from a chain outlet 1b formed on the upper surface of the base 1 via a roller 10 provided inside the base 1. A chain handle 12 for taking out the chain is provided at the other end of the chain 11. The length of the chain 11 is such that the maximum material 6 that can be cut is fixed. A vortex spring 13 whose one end is fixed to the base 1 is fixed to one end of the vice shaft 7, and a rotational force always acts in the rotational direction (rightward in FIG. 6) in which the pulley 8 tries to wind the chain 11.

4 and 5 are sectional views taken along the line CC of FIG. As shown in FIG. 4, from the side surface of the base 1 to the base hole 1
A screw 14 that is slidable in the axial direction is provided through c, and the rib 14a that is the tip of the screw 14 abuts a recess 15a of a screw holder 15 attached to the side of the worm shaft 9 of the vise shaft 7. ing. In order to lock the screw holder 15 and the rib portion 14a, the screw holder 15 is provided with a locking member 16 that comes into contact with the rib portion 14a via the groove portion 16a. The screw 14 has a worm portion 14b that can be screw-fitted to the worm wheel 9
And a spring 1 provided on the outer periphery of the screw 14 between the knob 17 fixed to the other end of the screw 14 and the base 1.
As shown in FIG. 5, the worm portion 14b of the screw 14 and the worm wheel 9 are normally separated from each other by constantly urging the screw 14 in the direction of pulling out the screw 14 (leftward in FIG. 4). The chain hook 19 that locks the chain handle 12 is attached to the left side surface of the base 1 in FIG. 1 by the rotation support member 20, and is rotatable about the rotation support member 20 as shown in FIG.

The chain handle base 1 on the base 1
By projecting d upward from the upper surface of the other base 1, when the chain 11 is entirely wound in the pulley 8 and the chain handle 12 is drawn into the chain outlet 1b,
It contacts the chain handle base 1d. At this time, the chain handle 12 is supported by the chain handle base 1d in a slightly raised state as shown by the chain double-dashed line in FIG.

In the above structure, when tightening a large-diameter material 6 as shown in FIG. 6 from the state of FIG. 7, holding the chain handle 12 slightly raised by the chain handle base 1d and pulling out the chain 11 causes the spiraling. The pulley 8 rotates in the direction opposite to the direction in which the spring 13 urges, the chain 11 wound around the pulley 8 is pulled out onto the base 1, and after hanging it on the material 6, the chain handle 12 is attached to the chain hook. Lock at 19. At this time, the chain 11 is pulled by the restoring force of the spiral spring 13 drawn into the inside of the base 1 so as not to loosen. Further, since the chain hook 19 is rotatably attached to the base 1 about the rotation support member 20, when the chain handle 12 is locked to the chain hook 19, it is
Even if the chain tension is unbalanced due to variations in the length of the chain around the book or variations in the chain length,
Since the chain hook 19 rotates to equalize the tension of the two chains, the chain hook 19 is pulled without loosening.

In this state, as shown in FIG. 4, when the screw 14 is pushed axially by the knob 17, the screw holder 15 rotates counterclockwise around the vise shaft 7 and moves upward, and the screw is accompanied by this rotation. 14 also moves upward, and the worm portion 14b of the screw 14 is pressed against the worm wheel 9 and screw-fitted. Further, when the knob 17 is rotated clockwise in this state, the worm wheel 9 is rotated by the worm portion 14b, and the pulley 8 is passed through the vice shaft 7.
Is rotated to the right, the extra chain 11 is wound around the pulley 8, and the material 6 is completely tightened by the chain 11. At this time, since the chain 11 is in a state in which there is almost no slack, it can be securely tightened by rotating the knob 17 once or twice.

When loosening the tightening of the material 6, the knob 1
Rotate 7 to the left. Then, the engagement between the worm wheel 9 and the worm portion 14b of the screw 14 becomes loose, and the restoring force of the spring 18 on the outer periphery of the screw 14 pulls the screw 14 and the screw holder 15 in the axial direction, so that the vice shaft 7 is used as an axis. The screw holder 15 rotates clockwise, the worm portion 14b is separated from the worm wheel 9, and the mesh is disengaged. Therefore, the chain 11 is slightly loosened, and the fixation of the material 6 is released. When the chain handle 12 is removed from the chain hook 19 in this state, the chain 11 is drawn into the base 1 by the spiral spring 13 and wound around the pulley 8.

As shown in FIG. 7, even when the small-diameter material 6 is tightened by the chain 11, only the required length of the chain 11 is pulled out from the pulley 8 and the extra chain 11 is wound around the pulley 8. Extra chain is base 1
The material 6 can be reliably tightened by the same procedure as the operation of tightening and loosening the large-diameter material 6 without being thrown onto the ground or the ground.

When the material 6 is loosened and the chain 11 is entirely wound around the pulley 8, the chain handle 12 provided at the other end of the chain 11 is the base as shown by the chain double-dashed line in FIG. Chain handle stand 1
Since the chain handle 12 is supported in a state of being slightly raised in contact with c, the chain handle 12 becomes very easy to hold when the chain 11 is pulled out.

[0020]

According to the present invention, since the extra chain generated when the material is tightened or loosened is wound around the pulley by the restoring force of the spiral spring, the material is always loosened. It is possible to make the chain vise device compact and inexpensive with a simple structure and a small space for storing the chain while enabling the fixing of the chain vise.

When the knob is pushed in the axial direction and rotated clockwise, the worm and the worm wheel mesh with each other to stretch the chain, and when the knob is rotated counterclockwise and the knob is released, the mesh between the worm and the worm wheel is disengaged.
Tightening and loosening the chain when fixing materials can be done easily and in a short time.

Further, since the chain hook is rotatably attached to the base, even if the lengths of the two chains are slightly different, the tension of the two chains can be equalized and the material can be securely fixed.

Further, since the chain handle base is provided on the base so that the chain handle floats above the upper surface of the base when the whole chain is wound up, the chain handle is easy to hold and the chain can be easily put in and taken out. it can.

[Brief description of drawings]

FIG. 1 is a front view of a horizontal band saw board according to an embodiment of the present invention.

FIG. 2 is a view of the chain vise portion viewed from the direction A in FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

4 is a cross-sectional view taken along the line CC of FIG.

5 is a cross-sectional view taken along line CC of FIG.

FIG. 6 is a cross-sectional view taken along the line DD of FIG. 2, showing a state in which the material is tightened.

FIG. 7 is a cross-sectional view taken along line DD of FIG. 2, showing a state in which the material is removed.

FIG. 8 is a sectional view of a conventional chain vise showing a state in which a large-diameter material is tightened.

9 is a diagram showing a state where the small-diameter material is tightened in FIG.

FIG. 10 is a diagram showing a state in which the chain is stacked on the base in FIG.

[Explanation of symbols]

1 ... Base, 1a ... Base surface, 1b ... Chain outlet,
1d ... Chain handle stand, 6 ... Material, 7 ... Vise shaft, 8 ... Pulley, 9 ... Worm wheel, 11 ... Chain, 12 ... Chain handle, 13 ... Spiral spring, 1
4 ... Screw, 14a ... Kei part, 14b ... Worm part,
15 ... Screw holder, 15a ... Recessed part, 16 ... Locking member, 17 ... Knob, 18 ... Spring, 19 ... Chain hook, 20 ... Rotation support member.

Claims (3)

[Claims] 1. A chain vise apparatus for fixing a material to a base by a chain, wherein one end of the chain is fixed in the base and a vice shaft having a pulley, a worm wheel and a screw holder for winding the chain is rotatably provided, A vortex spring that biases the chain in the direction of rotation to wind the pulley is installed at one end of the vise shaft, a chain hook is provided at the base to lock the other end of the chain, and the screw whose tip is locked to the screw holder is axially And a worm portion formed on the screw meshes with the worm wheel when the screw is pushed in the axial direction, and a compression spring for pushing the screw in the axial direction is provided on the outer circumference of the screw. A chain vise device characterized in that 2. The chain vise device according to claim 1, wherein the chain hook is rotatably provided on the base. 3. The chain according to claim 1, wherein a chain handle is attached to the other end of the chain, and a chain handle stand protruding upward from the upper surface of the base is provided at a chain outlet of the base. Vice device.