JPH0116562Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a belt pressing device for a woodworking machine that is provided inside a belt and presses the workpiece through an endless material feeding belt to the material feeding table side equipped with a cutting blade. Regarding.

<Prior art> As this type of tread pressure device, a large number of tread pressure rolls are arranged in parallel on the inner surface of the running portion of an endless material conveying belt along the material feeding path, and each roll is attached to the material feeding path side by springing. The most powerful thing is generally known. By the way, when each roll is biased by the spring, there are a large number of rolls (50 or more), and it is difficult to keep the spring constant constant, which may cause variations in the biasing pressure of each roll. , and when changing the biasing pressure, the entire spring must be changed, and the biasing pressure cannot be substantially changed. Therefore, as disclosed in Utility Model Application Publication No. 57-103808 (see Fig. 6), an air cylinder a is rotatably supported on a frame b, and a horizontal shaft c provided at the tip of the cylinder rod is It passes through a swinging arm e that is pivotally supported by the frame, and a tread pressure roll f is rotatably supported by the swinging arm e, and each cylinder is connected to an empty cylinder, and the cylinder is connected to the air cylinder. A method has been devised in which the cylinder rod is urged in the direction of extension by the stored pressure, thereby urging the tread pressure roll toward the material conveying belt, and the application of the spring is omitted.

By the way, in the above-mentioned device, the cylinder rod and the swinging arm e are supported by the shafts b and c, respectively, and are connected to each other by the shaft d. Therefore, when installing each to the frame, it is necessary to work to connect each shaft. The number of such parts is 50 or more, and in some cases, hundreds, making the installation work extremely troublesome.

<Purpose of the invention> The object of the invention is to provide a belt treading device that is assembled with as few pivots as possible and can smoothly bias a treading roll.

<Structure of the invention> A large number of pressure rolls are arranged in parallel on the inner surface of the running section of the endless material conveyance belt along the material conveyance path, and the pressure rolls are rotated by a swinging arm that swings around a support shaft. The rod end of a press cylinder which is freely pivoted and fixed to the frame is brought into contact with the swing arm, and its extension presses the press roll against the material conveying belt, and the cylinder rod and swing arm are connected to each other. The shaft connection is eliminated and only the swinging arm is pivoted.

<Operation of the invention> By supplying pressurized air into the press cylinder, the cylinder rod is urged in the direction of extension, and its tip presses the swinging arm. As a result, the swinging arm is given a rotational torque toward the belt about its support shaft, and presses the tread pressure roll rotatably supported by the swinging arm against the inner surface of the material conveying belt.

<Example> An example of the present invention will be described with reference to the accompanying drawings.

Figures 4 and 5 show an example of a vertical slicer to which the present invention is applied. On the front part of the base 1, a blade table 2 with a blade removably fixed to the rear edge is movable back and forth. It is placed on. Further, a rear table 4 whose front edge is inclined along the cutting edge is provided at the rear left side of the base 1, and a cutting blade 5 attached to the leading edge is made to correspond to the cutting edge.

Guide columns 7, 7 and lifting screws 8, 8 are inserted into a vertical frame 6 provided on the right side of the base 1, and support a platform 9 at its upper end.
can be adjusted to any desired height by controlling the rotation of the lifting screws 8, 8. In the front part of the loading platform 9, a material feeding frame 10 in the form of a housing supports front and rear driving rolls 11 and a driven roll 12, and an endless material feeding belt 13 is wrapped around both rolls. The device 14 is supported via the tables 2 and 4 and the material feeding path T, and the driving roll 11 is rotated by a drive motor 15 on the mounting platform 9 to rotate the material feeding belt 1.
3 runs.

A belt treading device according to the present invention is provided on the inner surface of the running portion of the material feeding belt 13 along the material feeding path T.

The belt treading device will be explained in detail with reference to FIGS. 1 to 3.

20 is a bolt 2 attached to the shelf wall of the material feeding frame 10.
A pressure cylinder 20 is mounted on the cylinder 1 and fixed in parallel along the running section, and a pressure chamber 23 on the piston 22 inside the cylinder 20 is provided with a pipe line 24.
Pressurized air from the accumulator 25 is supplied to each of the pistons 25 to urge the piston 22 downward. An abutment roll 27 is supported on the cylinder rod 26 at the tip of the piston 22 so as to be freely rotatable.

The above-described accumulator 25 keeps the pressure of the pressurized air supplied to each cylinder 20 constant, and by controlling the pressure supplied from the air source to the accumulator 25, the pressure inside the press cylinder 20 is Pressure can be changed freely.

Reference numeral 30 denotes a swinging arm disposed at the lower part of each pressing cylinder 20, which is connected to the material feeding frame 10.
It is inserted into and rotatably supported by a support shaft 31 fixed to the vertical wall of. The swinging arm 30 has an upper plate part 33 connected between the connecting ends 32, 32 supported by the support shaft 31, and a tread pressure roll is attached to the connecting ends 32, 32 at the lower part of the upper plate part 33. 35 is rotatably supported. Further, on the vertical wall of the material feeding frame 10, an end portion 32 is provided at a position directly below the linking end portion 32.
A regulating piece 37 is provided that comes into contact with the lower surface and determines its lowest swinging position.

The operation of the above embodiment will be explained.

When the cylinder rod 26 is expanded by supplying air into the press cylinder 20, its abutment roll 27 comes into contact with the upper plate part 33, causing the swinging arm 30 to be moved so that the lower surface of the linking end part 32 comes into contact with the regulating piece 37. Press it where it touches. At this position, the tread pressure roll 35 comes into pressure contact with the inner surface of the material conveying belt 13.

When the workpiece is supplied to the material feeding path T, the tread pressure rolls 35 arranged in a row on the inner surface of the material feeding belt 13 float up a little higher than the position where the workpiece is stopped by the regulating piece 37 due to the movement of the workpiece. , the cylinder 20
The internal pressure acts on the upper surface of the workpiece and presses the workpiece. At this time, the swinging arm 30 swings about the support shaft 31, but since the cylinder rod 26 is not in a linked relationship with the swinging arm 30,
The swinging arm 30 is not affected by such swinging motion.
The contact roll 27 is pressed against the upper surface to urge the tread pressure roll 35 toward the material conveying belt 13 side. Therefore, the pedal pressure operation can be performed smoothly without causing strain on each component.

The workpiece is pressed against the tables 2 and 4 by the above-mentioned tread pressure, and the running force of the material conveying belt 13 is transmitted to the workpiece, so that the workpiece is cut by the cutting blade 5.

<Effects of the invention> As explained in detail in the above embodiments, the invention has the following advantages:
By supplying pressurized air into the press cylinder 20, the tip of the cylinder rod 26 presses the swinging arm 30 to urge the tread roll 35 toward the material conveying belt 13 around the support shaft 31. Since there is no need to swing the pressing cylinder 20, the cylinder 20 can be fixed to the material feeding frame 10. Therefore, when assembling each component, the shaft communication operation is performed by moving the swinging arm 30 to the support shaft 31. It has excellent effects such as easy assembly as it only needs to be inserted through the hole.

[Brief explanation of the drawing]

The accompanying drawings show an embodiment of the present invention, with FIG. 1 being an enlarged longitudinal sectional side view of the main parts, and FIG. 2 being a longitudinal sectional front view of the same.
Figure 3 is a cutaway plan view of the same part excluding the pressure cylinder, Figure 4 is a schematic front view of the vertical slicer, Figure 5
The figure is a partially cutaway side view of the same, and FIG. 6 is a side view of the conventional device. 10; Material feeding frame, 13; Material feeding belt, 2
0: Pressing cylinder, 25: Air cylinder, 26: Cylinder rod, 27: Contact roll, 30: Swinging arm, 31: Support shaft, T: Material feeding path.

Claims (1)

[Scope of utility model registration request] In a woodworking machine in which a material feeding table equipped with a cutting blade and an endless material feeding belt that circulates around a plurality of rolls are arranged opposite to each other via a material feeding path, the material feeding path of the endless material feeding belt is A large number of tread pressure rolls are arranged in parallel on the inner surface of the running section along the track, and the tread pressure rolls are rotatably supported on a swinging arm that swings around a support shaft, and a pressure cylinder rod is fixed to a frame. 1. A belt treading device for a woodworking machine, characterized in that a tip of the treading roll is brought into contact with the swinging arm, and the treading roll is pushed against the material conveying belt by extension thereof.