JPH06246564A - Workpiece fixing device - Google Patents

Abstract

PURPOSE:To provide a workpiece fixing device allowing screw-fastening work or the like to be performed easily and rapidly at the time of fixing a workpiece so as to be extremely rational and economical from the viewpoint of work. CONSTITUTION:A workpiece fixing device is provided with a spring 8 for pulling a second chain intermediate part between a first chain intermediate part and a chain fixed end normally in the direction of generating chain tension, and a ratchet 13 and a claw member 22 for substantially fixing the chain part between the first chain intermediate part and the second chain intermediate part in the releasable state interlockingly with the rotation of a screw rod 30 with a handle for pulling a hook member 19 onto the worker side. A workpiece 37 can be thereby fixed easily and rapidly by the slight rotation of the screw rod 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work fixing device, and more particularly to a work fixing device that can be attached to a machine tool such as a band saw.

[0002]

2. Description of the Related Art A machine tool, for example, a band saw for cutting a work such as an electric wire tube, a gas pipe, or a profile is provided with a work fixing device for fixing the work. As one of the devices, a chain vise is known that can fix a plurality of works together.

In the chain vise, the middle part of the chain, whose one end side (back side) is fixed, is set on the work, and the other end side (worker side) of the chain is hooked on the locking member and engaged with it. It has a structural form in which the threaded rod member is rotated to pull the locking member toward the operator, and the work is fixed by the tension of the chain. The excess chain came into contact with the ground and the chain got dirty, making work uncomfortable.

[0004]

However, when the other end of the chain is hooked on the locking member, the amount of slack in the chain with respect to the work tends to increase due to manual work.
For this reason, the number of times the screw rod member for turning the locking member is turned is increased accordingly, which is troublesome and troublesome.

Therefore, it is an object of the present invention to realize a rational and work-economy work fixing device which can eliminate such inconvenience.

[0006]

In order to solve the above problems, the present invention sets a first chain middle part of a chain, one end of which is fixed, on a work on a receiving member and ends the other end of the chain. Is a work fixing device which can be attached to a machine tool and which fixes a work by tension of a chain by rotating a screw rod member engaged with the locking member to pull the locking member toward an operator. A second chain middle part between the first chain middle part and the chain one end,
An urging means for normally pulling in the direction in which the chain tension is generated is provided, and the first chain middle portion and the second chain middle portion are interlocked with the rotation of the screw rod member for pulling the locking member toward the operator. It is possible to fix the work easily and quickly by a slight rotation of the screw rod member by providing a releasable rotation stop means for substantially fixing the chain part between the work part and the chain part. And

[0007]

By hooking the other end of the chain to the locking member, the urging means for normally pulling the second chain intermediate part between the first chain intermediate part and the chain one end is initially operated. Chain tension is generated, then the locking member is rotated toward the operator side by the rotation of the screw rod member, and the chain between the first chain intermediate portion and the second chain intermediate portion is interlocked with the rotation. Combined with the fact that the parts are substantially fixed, easy and quick chain tension is generated, and the work is reliably fixed.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional side view of a work fixing device according to an embodiment of the present invention, and FIG. 2 is a sectional plan view of the device. Referring to these drawings, elongated holes 5 parallel to the bottom surface of the base are formed on both sides of the base 3 of the work fixing device 1 of the present embodiment, and the first elongated holes 5 are located so as to penetrate the elongated holes 5. The shaft 7 is movably supported translationally, and one end of the tension coil spring 8 hooked on the right side of the base is hooked on the central portion of the shaft so that the shaft 7 moves in the right direction (opposite to the worker side). Side) is normally biased. A pair of first chain receiving rollers 10 are rotatably supported on the first shaft 7 via predetermined bearings.

On the operator side (left side in the figure) of the base 3, a second shelter 12 extending so as to penetrate both sides of the base is rotatably supported via a predetermined bearing. This second
A pawl wheel 13 is centrally mounted on the shaft 12 and sprockets 15 are integrally mounted on both sides thereof. Further, a base wheel is provided on a second shaft portion between the pawl wheel 13 and both sprockets 15. A substantially triangular hook member 19 having a chain hooking portion 17 that partially protrudes from the upper portion of the hook 3 is rotatably supported with respect to the second shaft 12. The hook members 19 are integrally connected at their lower corners by a connecting rod 20, and at the center of the connecting rod 20, there is a pawl member 22 capable of engaging with the saw-toothed portion of the ratchet wheel 13. The pawl member 22 is rotatably mounted, and the other end of the tension coil spring 27 whose one end is hooked at the center of the bar member 25 fixed to the base 3 is attached to the lower end of the pawl member 22. It is normally biased in a direction in which the engagement relationship with the ratchet wheel 13 is canceled. The front side of the base (the left side in the figure) is on the inclined surface portion of the pawl member 22 on the opposite side of the connecting rod 20.
The tip of a screw rod 30 with a handle, which is obliquely screwed to the portion, can come into contact with and engage with the pawl member 22.
Is the ratchet wheel 13 when pressed by the screw rod 30 with a handle.
The pawl member 22 is moved (rotated) in the direction in which the engagement relationship with the pawl member 22 is established.

A third shaft 32 extending so as to pass through both sides of the base is fixed to a position above the center of the base 3, and a pair of second chain receivers are provided on the third shaft 32 via a predetermined bearing. The roller 34 is rotatably supported. Second chain receiving roller 34 and hook member 19
A pair of V-block-shaped receiving members 38 (FIG. 1) capable of horizontally supporting a work 37 (FIG. 1) having a circular cross section on both sides of the upper end of the base at an intermediate position with respect to the chain hooking portion 17 of FIG.
It looks like they overlap).

Inside the base having such a mechanical structure, a pair of chains 40 are arranged and arranged as follows. That is, one ends of both chains 40 are attached to both sides of the bar member 25 at the lower end of the center of the base, and both chains 40 are first pulled from there to the right direction (direction opposite to the worker side). After being hung on the first chain receiving roller 10 on the first shaft 7, it is pulled from there in the opposite direction (worker side) and hung on the sprocket 15 on the second shaft 12, and again in the opposite direction ( The second chain receiving roller 34 on the third shaft 32 is pulled in the direction (opposite to the operator's side), and is projected in the opposite direction (operator's side) and obliquely upward outside the base. Has been laid around.

The other ends of the two protruding chains 40 are
Both chains 40 are connected by a hollow round bar 42 (shown only in FIG. 2) so that they can operate in synchronization with each other (in FIG. 2, only the ends of the chains are largely pulled out to the operator side intentionally). Has been). By the way, both chains 4
Since the first shaft 7 (first chain receiving roller 10) on which 0 is hooked is biased in the right direction (direction opposite to the worker side) as described above, both chains 40 are
As a result, although a force such that the hollow rod 42 is drawn into the base is constantly applied, the hollow round rod 42 exists (functions like a supporting rod), and therefore the opening for chain projection (not shown). Therefore, there is no risk that the chain 40 will get inside the base. In FIG. 1, in order to fix the work 37, the hollow round bar 42 is a chain hooking portion 1 of the hook member 19 protruding from the base 3.
Hooked at 7.

The work 37 is vertically clamped by the chain portion and the V-block-shaped receiving member 38 which are thus drawn inside the base and exposed to the outside, and are fixed to the base 3 hereinafter. The operation of the main components at the time of detachable fixing will be briefly described.
First, the worker receives the work 37 by the receiving member 38 on the upper part of the base.
And then hooking the hollow round bar 42 to the chain hooking portion 17 of the hook member 19,
As described above, due to the action of the force of drawing into the base,
The two chain portions protruding to the outside of the base tend to be straight, so that the work 37 is sandwiched by the two chains 40 and the receiving member 38 with a weak force to some extent.

Next, as shown in FIG. 1, when the screw rod 30 with a handle is turned so that the tip of the rod pushes the inclined surface of the pawl member 22 to move it, the pawl member 22 causes the pawl wheel 13 ( To prevent the sprocket 15 (second shaft 12) from rotating about its rotational direction when the chain 40 is pulled out, and at the same time, the pawl member is prevented from rotating. The force of pressing 22 also acts on the hook member 19 via the connecting rod 20, and pulls the chain hooking portion 17 toward the operator. By stopping the rotation of the sprocket 15 and pulling the chain hooking portion 17 toward the operator, the receiving member 3
The work 37 on 8 is immediately and surely fixed. When the threaded rod 30 with the handle is rotated, both chains 40 are initially in a tensioned state to some extent (although it is weak as described above), and the fixing operation is immediately started from that state, so that the fixing operation is fixed. The time until is extremely short, in other words, the work can be fixed by slightly turning the screw rod 30 with the handle.

On the contrary, in order to release the work fixing, the screw rod 30 with the handle may be loosened slightly, whereby the engagement between the ratchet wheel 13 and the pawl member 22 can be released and the hook member 19 ( Since the chain hooking portion 17) can rotate in the direction in which the chain 40 is loosened (clockwise in FIG. 1), an operator can easily remove the chain 40 from the chain hooking portion 17, that is, the work 37. It can be easily unlocked.

[0016]

As described above, according to the present invention, it is possible to easily and quickly perform a screwing operation or the like when fixing a work, and it is possible to perform a rational operation economically without the chain becoming dirty.

[Brief description of drawings]

FIG. 1 is a sectional side view of a work fixing device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional plan view of the same device.

[Explanation of symbols]

 1 ... Work fixing device 3 ... Base 8 ... Tensile coil spring 13 ... Claw wheel 15 ... Sprocket 17 ... Chain hooking part 19 ... Hook member 22 ... Claw member 30 ... Handle screw rod 37 ... Work 40 ... Chain

Claims (1)

[Claims] 1. A screw rod member which is set on a work on a first member for receiving a first chain middle portion of a chain whose one end is fixed, hooks the other end of the chain with a locking member, and engages with the locking member. A work fixing device which can be attached to a machine tool, wherein the work is fixed by rotating the locking member toward the operator side by the tension of the chain, and the work fixing device is provided between the first chain middle part and the chain one end part. The first chain is interlocked with the rotation of the screw rod member for pulling the locking member toward the worker while providing a biasing means for normally pulling the middle portion of the second chain in the direction in which the chain tension is generated. By providing releasable rotation stopping means for substantially fixing the chain portion between the intermediate portion and the second chain intermediate portion, the work can be easily and quickly fixed by a slight rotation of the screw rod member. Characterized by Work fixing device.