JP2516480B2 - Wide belt sander treading device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treading device for a wide belt sander machine which controls treading pressure by air pressure.

[0002]

2. Description of the Related Art One or more endless sanding belts are hung on a belt driving mechanism provided on a sanding frame, a treading device is arranged on the side of a material feeding passage, and the treading surface is brought into contact with the inner surface of the belt. Various wide belt sander machines have been proposed in which the above grinding head is installed opposite to the material feeding device via the material feeding passage. By the way, in the conventional treading device of the wide belt sander machine, it is common to press the sanding belt b against the processed material w over the entire width thereof with the single treading pad p. Then, as shown in FIG. 12, at the edge e of the processed material w,
The belt b is pressed so as to cover the edge e, and the corners are dropped to cause edge sag. In particular, when the processed material w has a warp and four edges are projected upward, the adverse effect is remarkable.

Therefore, in order to solve the above-mentioned drawbacks, a treading device having a plurality of ventilation members connected to each other of the rods of the air cylinder in a row in the width direction is provided, and the width of the processed material w is increased. Correspondingly, operate only the required ventilation member,
It is proposed that the pedaling pressure is exerted on the upper surface of the processed material w. For example, according to Japanese Patent Laid-Open No. 1-159165, a pedaling device is provided with a large number of ventilation members arranged in a row in the width direction of a material feeding passage, and a large number of air cylinders connecting a cylinder rod to each ventilation member. In the forward direction of the pedaling device, a large number of processed material detectors are arranged in a row so that two or more processed material detectors are arranged within the width interval corresponding to each ventilation member, and the air pressure of the air cylinder is set. Is configured to convert.

However, in these configurations,
Not only the construction of the wide belt sander machine is complicated because a large number of air cylinders are required, but also the production cost is inevitably high.

The present invention has been made in view of the above problems, and is a wide belt sander which can prevent edge drooping of a processed material, can be applied to a complicated processed material, and has a simple structure. A treading device for a machine is provided.

[0006]

According to a first pedaling device of the present invention, a plurality of ventilation grooves opening in the material feeding direction are provided in a row in the pedaling frame along the width direction, and a ventilation member is provided in each ventilation groove. Wear, and cover all ventilation members with a single flexible covering,
The outer surface is used as a tread surface, and the air ducts for individually controlling the air supply to each ventilation groove are connected to each ventilation groove, and the pressure air is supplied to the ventilation member in the ventilation groove from the air pipeline. It is characterized in that it is configured such that the treading surface is supplied and the treading surface is set to the treading position, and the air in the ventilation member is removed from the air duct to the non-treading position.

In the second treading device, a plurality of ventilation grooves, which open in the material feeding direction, are provided in the treading frame along the width direction, and the openings of the ventilation grooves are shielded by the ventilation member. The inside is an air chamber, all the ventilation members are covered with a single flexible covering material, and the outer surface is used as a tread surface, and an air pipeline for individually controlling the air supply to each air chamber is provided. It is configured to communicate with each air chamber, supply pressured air to the air chamber from the air pipeline to set the tread surface to the tread position, and remove the air in the air chamber from the air duct to the non-tread position. Is.

Further, in the third pedaling device, a plurality of ventilation grooves, which open in the material feeding direction, are provided in a row in the material feeding direction in the pedaling frame, and the openings of the ventilation grooves are formed by a single flexible covering material. Cover,
The inside of each ventilation groove is used as an air chamber, and the outer surface of the flexible covering material is used as a tread surface, and an air pipeline for individually controlling the air supply to each air chamber is connected to each air chamber. It is characterized in that the pressure air is supplied into the room from the air duct to set the tread surface to the tread position, and the air in the air chamber is removed from the air duct to the non-tread position.

In each of the above configurations, a pressure regulating plate may be provided on the inner surface of the flexible covering material.

[0010]

In each of the pedaling devices, when the pedaling action is to be generated in a desired ventilation groove, air is supplied from the air duct to the ventilation member. That is, in the first pedaling device, the pressurized air applies a pressing force to the inner surface of the movable covering material through the ventilation member, and produces a pedaling pressure applied to the processed material on the outer surface of the pedaling surface. become.

In the second pedaling device, the compressed air causes a pressing force in the material feeding direction of the flexible covering material via the ventilation member arranged below the air chamber, and the flexible covering material is flexed. A tread pressure against the processed material is generated on the tread surface that is the outer surface of the functional covering material.

In the third pedaling device, the pressurized air causes a pressing force in the feeding direction of the flexible coating material forming the lower surface of the air chamber, and the flexible air pressure is applied to the flexible coating material. The tread pressure against the processed material is generated on the tread surface which is the outer surface of the covering material.

Further, when the pressure regulating material is brought into contact with the upper surface of the flexible coating material, the flexible coating material is subjected to the action of the pressure air through the pressure regulating material, so that it is particularly present between the ventilation grooves. A uniform treading pressure is applied, and the treading surface formed by the lower surface of the flexible covering material can be made more uniform.

[0014]

EXAMPLE A schematic view of a wide belt sander machine of the present invention will be described with reference to FIG. A vertical frame 2 is provided upright on the rear portion of the lower frame 1, and a material feeding frame 5 is supported on the front portion of the lower frame 1 by lifting screws 3 and 3 which rotate in conjunction with a handle 4. A drive roller 6 is attached to the material feeding frame 5.
A material feeding device F, which supports the driven roller 7 and the driven roller 7 and hangs the material feeding belt 8 on the rollers 6 and 7, is provided so as to be able to move up and down by the rotation of the handle 4.

The vertical frame 2 is provided with a sanding frame 10 on the material feeding device F via a material feeding passage, and a tension roller 1 is provided above the sanding frame 10.
1 is provided vertically so that it can be moved up and down. Further, at the bottom of the sanding frame 10, the drive roller 12 is provided on the supply side.
The driven roller 13 is provided on the discharge side, and the stepping device P is provided between the drive roller 12 and the driven roller 13.
When the sanding belt 14 is stretched around the belt driving mechanism including the tension roller 11, the driving roller 12, and the driven roller 13, and the processed material w comes directly below by the treading device P, it is supplied to the material feeding passage T. The sanding belt 14 is pressed against the processed material w.

An embodiment of the present invention relating to the treading device P arranged in the central portion of the wide belt sander will be described in detail below.

A first embodiment of the present invention will be described with reference to FIGS. In the treading device P of the present embodiment, the treading frame 20 is fixed to the sanding frame 10 and can be freely attached to and detached from the mounting frame 32 arranged between the driving roller 12 and the driven roller 13 in the width direction. Ventilation grooves 21 that open to the material feeding passage T side are arranged in multiple rows in the width direction in the pedaling frame 20. Ventilation members 23 made of a porous material such as sponge and felt are fitted in the plurality of ventilation grooves 21, respectively, and the protrusions on both sides are formed in the lower part of the ventilation members 23 so as to face each other. Two
An elastic body 24 is disposed by being sandwiched by 9, 9 and a lower surface thereof is made of a flexible coating material 25 made of a wear resistant material.
Covered with. The flexible covering material 25 is the tread frame 2
It is fixed in a tension shape at both side positions of 0, and the lower surface thereof serves as a tread surface.

The ventilation member 23 penetrates through the treading frame 20 to supply air conduit 22a and exhaust air conduit 2 respectively.
2b communicates with each other, and the supply air conduit 22a and the discharge air conduit 22b are located above the pedal pressure frame 20 and project into the feeding lumen 30 arranged inside the attachment frame 32, and further, The supply air pipeline 22a is an air supply source B.
1 and B2, and the exhaust air conduit 22b is connected to the air exhaust device A, respectively. The air supply sources B1 and B
2 is provided via solenoid valves V1 and V2 as shown in FIGS. 4 and 5, and the conversion device V1 is provided with air supply sources B1 and B2.
The switching control of the air supply is performed by the converter V2. Further, an electromagnetic valve V3 for controlling the discharge of air by an on / off operation is arranged on the discharge air pipe line 22b. The air supply sources B1 and B2 have different capacities, and the air supply source B1 is the air supply source B.
It has a larger capacity than No. 2, and by controlling the air pressure in two stages, it is possible to control the pedaling pressure applied to the processed material w.

A large number of processed material detectors s are provided in the front direction of the pedaling device P along the width direction, and the state of the processed material w is detected by each of the detectors s, and based on this signal. The air supply sources B1 and B2 or the air discharge device A are driven.

When the work material w is ground and polished by the treading device P having the above-mentioned configuration, a large number of work material detectors s insert the work material w by inserting the work material w into the material feeding passage. The air supply source B1 or B2 is driven by the signal from each of the detectors s, and the compressed air is supplied into the ventilation member 23 through the supply air conduit 22a.
As a result, the volume of the ventilation member 23 increases, and the elastic body 24 abutted on the lower surface of the ventilation member 23 is pressed. Due to this pressing force, the pedaling device P
Is in the tread condition.

On the other hand, when the work material w is not supplied, the electromagnetic valve V3 on the discharge air pipe line 22b is operated and converted by the signal of the work material detector s so that the pressure is generated by the air discharge device A. By sucking air and reducing the volume of the ventilation member 23, the treading pressure is not applied to the elastic body 24. Thereby, the pedaling device P
Is in a non-pedaling state.

A second embodiment of the present invention will be described with reference to FIG. In this embodiment, the pedal pressure frame 20 in the first embodiment is used.
In the vent groove 2 without the protrusions 29, 29
The whole 1 is formed by the ventilation member 23, and the lower surface thereof is covered with the flexible covering material 25.

Even in this structure, the same air control means as in the first embodiment is applied, and the air supply conduit 22a penetrates the tread frame 20 on the upper surface of the ventilation member 23.
And one end of the exhaust air pipeline 22b are connected, the other end of the supply air pipeline 22a is connected to the air supply sources B1 and B2, and the air supply source B is provided on the supply air pipeline 22a.
An electromagnetic valve V1 for performing drive conversion of 1 and B2 and an electromagnetic valve V2 for performing on / off operation of air supply are arranged. Further, the other end of the discharge air pipe line 22b is connected to the air discharge device A, and a solenoid valve V3 that controls discharge of air by an on / off operation is arranged in the middle thereof.

In such a construction, when the processed material w is inserted into the material feeding passage, a large number of processed material detectors s detect the shape of the processed material w, and the air supply sources B1 and B2 are driven by the signals thereof. Then, the compressed air is sent to the ventilation member 23 via the supply air pipe line 22a, and the ventilation member 23 directly depresses the sanding belt 14 via the flexible covering material 25, and the treading device P is operated. Set the pedal pressure.

On the other hand, when the work material w is not supplied, the air discharge device A is driven by the signal from the work material detector s, so that the ventilation member 23 is supplied.
Is sucked from the exhaust air conduit 22b to bring it into a non-depressing state.

A third embodiment of the present invention will be described with reference to FIG. In this embodiment, the ventilation member 23 is fitted to the protrusions 29, 29 of the pedaling frame 20 similar to that used in the first embodiment described above, and the air chamber 35 is generated in the ventilation groove 21. There is. Then, the flexible covering material 25 is directly brought into contact with the lower surface of the ventilation member 23, and the supply air pipeline 2 is provided in the air chamber 35.
2a communicates with one end of the exhaust air conduit 22b.
Further, the other end of the supply air pipeline 22a is connected to the air supply source B.
A solenoid valve V1 for connecting the air supply sources B1 and B2 and a solenoid valve V2 for performing an on / off operation of the air supply are arranged on the air pipe line 22a connected to the air supply lines 1 and B2. On the other hand, the other end of the exhaust air conduit 22b is connected to the air exhaust device A, and an electromagnetic valve V3 for performing on / off operation of air exhaust is arranged on the exhaust air conduit 22b.

When the pedaling device P is to be in a pedaling state, by supplying pressurized air from the air supply source B1 or the air supply source B2 to the air chamber 35 through the supply air pipeline 22a, the ventilation is performed. This causes the member 23 to have an even downward pressing force. Further, when the work material w is not supplied, the air in the air chamber 35 is discharged through the discharge air pipeline 22b by driving the air discharge device A, and the air chamber 35 is discharged. The inside is brought to a normal pressure state and the pedaling device P is brought to a non-pedaling state.

A fourth embodiment of the present invention will be described with reference to FIG. In this embodiment, the pressure regulating plate 40 is arranged on the upper surface of the flexible covering material 25 in the first to third embodiments. In the configurations of the first to third embodiments described above, there is the partition wall of the treading frame between the ventilation grooves 21, and therefore, there is no ventilation member 23 at the lower edge of the partition wall, and the treading pressure is reduced. Has no effect. Therefore, a non-pressurized portion is formed on the tread surface at a position between the ventilation grooves 21, and the sanding belt 14 is bent, which may cause uneven polishing of the processed material w. So, like this configuration,
By contacting the pressure regulating plate 40 directly below the ventilation member 23, the sanding belt 1 can be removed from the plurality of ventilation members 23.
A single pressure regulating plate 40 receives the pedaling pressure applied to 4 and exerts a pressure on the flexible covering material 25 via the pressure regulating plate 40, so that even pressure is exerted even between the ventilation grooves 21. It is possible to prevent the occurrence of bending of the sanding belt 14.

A fifth embodiment of the present invention will be described with reference to FIG. The ventilation groove 21 of the pedal pressure frame 20 used in the first and third embodiments is used as a cavity, and this is used as an air chamber 36.
The flexible coating 25 is supported and fixed by the projections 29 provided at both ends of the inlet of the air chamber 36, and the air chamber 36 is provided with the treading frame 20 penetrating therethrough. Air conduit 22a and exhaust air conduit 22b
It is designed to connect one end of the. The other end of the supply air pipeline 22a is connected to air supply sources B1 and B2, and the air supply sources B1 and B2 are provided on the air pipeline 22a.
An electromagnetic valve V1 for performing the above conversion and an electromagnetic valve V2 for performing on / off operation of air supply are arranged. The other end of the exhaust air conduit 22b is connected to the air exhaust device A,
An electromagnetic valve V3, which controls the discharge of air by an on / off operation, is arranged on the air conduit 22b.

According to this structure, as the processed material w is supplied, the processed material detector s detects the shape of the processed material, and the signal is sent to the air supply source B1 or the air supply source B2.
Is driven, and the pressurized air is fed into the air chamber 36 via the supply air conduit 22a. As a result, the air pressure in the air chamber 36 rises, and this pressure causes a pedaling pressure from the inner surface of the sanding belt 14 in the direction of the workpiece w, whereby the pedaling device P is in a pedaling state.

When the processing material w is not supplied, the inside of the ventilation groove 21 is kept at normal pressure via the exhaust air conduit 22b in response to a signal from the processing material detector s. No treading.

A sixth embodiment of the present invention will be described with reference to FIGS. 10 and 11. In this embodiment, in the treading frame 20 in which the protrusions 29 are not provided on both sides of the opening, elasticity of sponge, rubber, non-woven fabric or the like is provided so as to cover the entire lower surface of the air chamber 36 of the treading frame 20. A pressure regulating plate 41 made of a material is provided, and the pressure regulating plate 41 is covered with a flexible covering material 25. The pressure regulating plate 41 is shown in FIG.
As shown in FIG. 1, a rectangular hole 42 is formed corresponding to the opening of the ventilation groove 21. The pressure regulating plate 41 keeps the flexible covering material 25 in a tensioned state and prevents the wrinkles from occurring.

[0033]

According to the present invention, a ventilation member is arranged inside the tread surface of a treading device, and compressed air is sent into the ventilation member from a supply air pipe line, and the work material is processed by the treading pressure by the air pressure. Since it is configured to perform grinding, the structure of the treading device is simple and the manufacturing cost thereof is low.

Further, if the pressure air supplied from the supply air conduit is directly brought into contact with the inner surface of the sanding belt without using a ventilation member, a pedaling pressure is generated. The structure is further simplified, and the manufacturing cost is further reduced.

Furthermore, since the tread pressure is supplied to the ventilation member only by connecting the supply air pipelines having a fine cross section, the tread pressure having a more finely divided tread surface is provided. The device can be formed, and there is an effect that more appropriate grinding and polishing can be performed according to the shape of the ground surface of the processed material.

[Brief description of drawings]

FIG. 1 is a schematic view of a wide belt sander machine.

FIG. 2 is a vertical sectional side view of a pedaling apparatus P according to a first embodiment of the present invention.

FIG. 3 is a vertical sectional front view of a pedaling apparatus P according to a first embodiment of the present invention.

FIG. 4 is a layout view of a pressurized air supply / discharge device of the present invention in a supply state.

FIG. 5 is a layout view of the pressurized air supply / discharge device of the present invention in the discharged state.

FIG. 6a is a vertical sectional side view of a treading device P according to a second embodiment of the present invention.

FIG. 6b is a vertical sectional front view of a treading device P according to a second embodiment of the present invention.

FIG. 7a is a vertical sectional side view of a pedaling apparatus P according to a third embodiment of the present invention.

FIG. 7b is a vertical sectional front view of a pedaling apparatus P according to a third embodiment of the present invention.

FIG. 8a is a vertical sectional side view of a treading device P according to a fourth embodiment of the present invention.

FIG. 8b is a vertical sectional front view of a pedaling apparatus P according to a fourth embodiment of the present invention.

FIG. 9a is a vertical sectional side view of a pedaling device P according to a fifth embodiment of the present invention.

FIG. 9b is a vertical sectional front view of a pedaling apparatus P according to a fifth embodiment of the present invention.

FIG. 10a is a vertical sectional side view of a treading device P according to a sixth embodiment of the present invention.

FIG. 10b is a vertical sectional front view of a pedaling apparatus P according to a sixth embodiment of the present invention.

FIG. 11 is a plan view of a pressure regulating plate 41 used in a sixth embodiment of the present invention.

FIG. 12 is a vertical cross-sectional side view of a pedaling device P showing a drawback of a conventional example.

[Explanation of reference signs] 20 treading frame 21 ventilation groove 22a supply air pipeline 22b discharge air pipeline 23 ventilation member 25 activatable covering material 29 projections 35, 36 air chamber 40, 41 pressure regulating plate P treading device w processing Material

Claims (4)

(57) [Claims] 1. One to a plurality of grinding heads, wherein an endless sanding belt is stretched around a belt drive mechanism, a treading device is arranged on the side of a material feeding passage, and the treading surface is in contact with the inner surface of the endless sanding belt. , In a wide belt sander machine that is opposed to the material feeding device through the material feeding passage,
Ventilation grooves that open in the material feeding direction are provided in rows in the trampling frame along the width direction, a ventilation member is installed in each ventilation groove, and all ventilation members are covered with a single flexible covering material. , The outer surface of which is used as a tread surface, and an air pipeline for individually controlling the air supply to each ventilation groove is communicated with each ventilation groove,
The pressure air is supplied to the ventilation member in the ventilation groove from the air duct to set the tread surface to the tread position, and the air in the ventilation member is removed from the air duct to the non-tread position. Wide belt sander treading device. 2. One to a plurality of grinding heads, wherein an endless sanding belt is looped over a belt drive mechanism, a treading device is arranged on the side of the material feeding passage, and the treading surface is in contact with the inner surface of the endless sanding belt. , In a wide belt sander machine that is opposed to the material feeding device through the material feeding passage,
A plurality of ventilation grooves that open in the material feeding direction are provided in the treading frame along the width direction, and the openings of each ventilation groove are shielded by a ventilation member, and the inside of the ventilation groove serves as an air chamber. It is covered with a single flexible covering material and its outer surface is used as a tread surface, and an air conduit for individually controlling the air supply to each air chamber is connected to each air chamber, and pressure is applied to the air chamber. A treading device for a wide belt sander, characterized in that air is supplied from an air duct to set a tread surface to a tread position and air in an air chamber is removed from the air duct to a non-tread position. . 3. One to a plurality of grinding heads, wherein an endless sanding belt is wound around a belt drive mechanism, a treading device is arranged on the side of the material feeding passage, and the treading surface is in contact with the inner surface of the endless sanding belt. , In a wide belt sander machine that is opposed to the material feeding device through the material feeding passage,
A plurality of ventilation grooves that open in the material feeding direction are provided in the treading frame along the width direction, the openings of each ventilation groove are covered with a single flexible covering material, and each ventilation groove serves as an air chamber. In addition, the outer surface of the flexible covering material is used as a tread surface, and air pipes for individually controlling the air supply to the air chambers are connected to the air chambers, and compressed air is supplied to the air chambers. A wide-belt sander treading device, which is configured so that the treading surface supplied from the air is set to a treading position and the air in the air chamber is removed from the air duct to a non-treading position. 4. A pressure regulating plate is provided on the inner surface of the flexible covering material, wherein the pressure regulating plate is arranged.
Wide belt sander treading device.