JPH0623384Y2 - Saw machine loading vise return position detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a return position detecting device for detecting the return position of a loading vise provided on a saw.

[Conventional technology]

BACKGROUND ART Conventionally, a saw machine for rotating an endless saw blade to cut a work fixed by a fixed vise is provided with a loading vise for conveying the work to be cut to the fixed vise side.

In the loading vise, a loading frame reciprocally movable by a feeding hydraulic cylinder is supported on a guide rod laid in the feeding direction, and a fixed side vise and a moving side vise for fixing a work are provided on the loading frame. ing.

Further, an adjusting screw is provided in parallel with the guide rod, and by rotating the adjusting screw with a handle or the like, the feeding material positioning slide nut screwed to the adjusting screw is moved to make the feeding material cutting length arbitrary. It can be set to.

[Problems to be solved by the invention]

In a conventional saw machine, a limit switch is provided on the material feeding positioning slide nut to detect when the loading vise has returned to the return position.However, with this method, at the same time the loading frame abuts the material feeding positioning slide nut. It is necessary to adjust the mounting position of the limit switch so that the limit switch operates, and it takes a lot of man-hours for the adjustment work.If the adjustment is poor, the limit switch will not be operated before the loading frame contacts the material feeding positioning slide nut. Due to variations in the stop position of the loading frame during operation, there is a problem that the cutting length cannot be set with high accuracy.

[Means and Actions for Solving Problems]

The present invention has been made for the purpose of improving the above-mentioned problems. An endless saw blade is rotatably provided in a saw frame body which is vertically movable around a fulcrum by a swing cylinder, and a lower portion of the saw frame body is provided. In addition, a fixed vise for fixing the work to be cut by the saw blade, a loading vise that is movable in the material feeding direction by the material feeding hydraulic cylinder on the work loading side, and the loading vise are stopped at a preset return position. In the case where a material feeding positioning slide nut is provided, an operating rod urged in the material feeding direction by a compression spring is provided in the loading frame of the loading vise, and this operating rod and the tip of the piston rod of the material feeding hydraulic cylinder are connected. Connected and provided with a return position detection switch on the side of the loading frame, and on the side of the operating rod, The pusher that pushes the return position detection switch with the urging force of the compression spring, and separates from the return position detection switch when the loading frame is stopped by the material feeding positioning slide nut to the return position and the compression spring is compressed. It is an object of the present invention to provide a saw blade loading vise return position detecting device capable of accurately detecting the return of the loading vise to the return position by a signal from the return position detection switch.

〔Example〕

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

In the figure, 1 is a bed of a saw machine, on which a saw frame main body 4 supported by a bracket 2 whose rear end is fixed to the bed 1 through pins 3 is provided.

A swing cylinder 5 for vertically moving the saw frame body 4 around the pin 3 is provided between the saw frame body 4 and the bed 1, and the driven wheel 6 is separated in the saw frame body 4 in the front-rear direction. And a drive wheel 8 rotated by a saw blade driving motor 7, and an endless saw blade 9 is provided between the driven wheel 6 and the drive wheel 8.
Is wound.

On the bed 1 below the saw frame body 4, a fixed vise 11 for fixing a work 10 to be cut by a saw blade 9 is provided.
However, a loading vise 12 for transporting the work 10 is installed on the loading side of the work 10.

As shown in FIG. 3, the loading vise 12 has a loading frame 14 supported by two guide rods 13 laid in the material feeding direction.

The loading frame 14 is reciprocally movable along the guide rod 13 by the material feeding hydraulic cylinder 15 installed on the bed 1 side, and is fixed on the loading frame 14 by the fixed side device 12a and the vise cylinder 16. A moving-side device 12b is provided which is movable in the contacting / separating direction of the side device 12a.

On the other hand, an adjusting screw 18 is rotatably supported between the guide rods 13 so as to be parallel to the guide rods 13.
A material feeding positioning slide nut 19 is screwed onto the.

The bracket 1 is attached to the material feeding positioning slide nut 19.
9a is provided in a protruding manner, the bracket 19a is slidably supported by one guide rod 13, and the feed material positioning slide nut 19 is guided by the guide rod 13 along with the rotation of the adjusting screw 18. The adjusting screw 18 is movable along 13 and a handle 25 for rotating the adjusting screw 18 is attached to one end of the adjusting screw 18.

Further, as shown in FIG. 4, at the connecting portion between the loading frame 14 and the material feeding hydraulic cylinder 15 that reciprocates, a compression spring is provided in a cylindrical spring chamber 14a protrudingly provided on the loading frame 14 side. The one end side of the operating rod 21 biased by 20 in the direction opposite to the material feeding hydraulic cylinder 15 is accommodated. The other end of the operating rod 21 penetrates the end plate 14b that closes the spring chamber 14a and projects to the outside of the spring chamber 14a, and the tip of the operating rod 21 is a piston of the material feeding hydraulic cylinder 15 via a joint 22. It is connected to the rod 15a.

A pusher 23 composed of an adjustable bolt is screwed on the tip side of the lever 22a protruding from the joint 22, and the return position detection switch mounted on the outer peripheral portion of the spring cylinder 14a by the pusher 23. 24 is turned on and off.

Next, the operation will be described. The cutting length of the work 10 is set by rotating the adjusting screw 18 with the handle 25 and moving the material feeding positioning slide nut 19 along the guide rod 13.

In this state, the work 10 is clamped between the fixed side vise 12a and the fixed side vise 12b at the return position where the loading frame 14 contacts the material feeding positioning slide nut 19, and the material feeding hydraulic cylinder 15 starts the material feeding. However, at this time, the tip of the operating rod 21 is pressed against the loading frame 14 by the action of the compression spring 20, and the return position detection switch 24 is pushed by the pusher 23 to be in the ON state.

Next, the material feeding hydraulic cylinder 15 strokes a certain distance,
When the work 10 clamped by the loading vise 12 is transferred to the fixed vise 11, the loading vise 12 is retracted by the material feeding hydraulic cylinder 15 together with the unclamping of the work 10. At this time, the tip of the operating rod 21 is also compressed by the compression spring 20. It is pressed against the loading frame 14 side, and the return position detection switch 24 also maintains the ON state.

When the loading vise 12 reaches the return position, the loading frame 14 first comes into contact with the material feeding positioning slide nut 19 and is stopped at the return position, and the piston rod 15a of the material feeding hydraulic cylinder 15 further reaches the stroke end. Since it is retracted up to, the operating rod 21 pushes the compression spring 20 to bend it.

As a result, the return position detection switch 24, which has been turned on by the pusher 23 until now, is turned off, the switching valve (not shown) provided in the hydraulic circuit of the material feeding hydraulic cylinder 15 is switched, and the loading vise 12 is returned by the off signal. It becomes possible to detect the return to the position.

[Effect of device]

As described in detail above, this invention operates the return position detection switch after the loading vise is stopped by the material feeding positioning slide nut to detect the return position. Since the limit switch does not operate, it is possible to eliminate variations in the stopping position of the loading vise.

As a result, the work can be cut with high accuracy and no adjustment work is required, so that the work can be easily assembled.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is a side view of a saw, FIG. 2 is a plan view of the saw, FIG. 3 is an enlarged plan view of the vicinity of a loading vise, and FIG. FIG. 4 is a saw frame main body, 5 is a swing cylinder, 9 is a saw blade, 10 is a work, 11 is a fixed vise, 12 is a loading vise, 15 is a hydraulic cylinder for material feeding, 15a is a piston rod, and 19 is a material feeding positioning slide nut.

Claims (1)

[Scope of utility model registration request] 1. An endless saw blade (9) is rotatably provided in a saw frame body (4) which is vertically movable around a fulcrum by a swing cylinder (5), and the saw frame body (4) is also provided. A fixed vise (11) for fixing the work (10) to be cut by the saw blade (9) below the table, and a feed hydraulic cylinder (15) for moving the work (10) in the feed direction to the loading side of the work (10). Loading vise (12) and material feeding positioning slide nut (19) for stopping the loading vise (12) to a preset return position
In addition, the loading vise (1
In the loading frame (14) of 2), the compression spring (2
0) is provided with an operating rod (21) urged in the feeding direction, and the operating rod (21) and the feeding hydraulic cylinder (1) are provided.
5) The tip of the piston rod (15a) is connected, a return position detection switch (24) is provided on the side of the loading frame (14), and the compression spring (20) is attached to the side of the operating rod (21). The return position when the return position detection switch (24) is pressed by the force and the loading frame (14) is stopped to the return position by the material feeding positioning slide nut (19) and the compression spring (20) is compressed. A loading vise return position detecting device for a saw machine, which is provided with a pusher (23) separated from the detection switch (24).