JP2521385Y2 - Treading device for wide belt sander machine - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a wide belt sander machine applied to grinding and polishing of a main material or the like.

[Prior Art] An endless sanding belt is hung on a belt driving mechanism provided in 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. A wide belt sander machine in which a grinding head is opposed to a material feeding device via a material feeding passage is known.

On the other hand, when the endless sanding belt is pressure-contacted with the single pressing member over the entire width of the processed material, the edge of the processed material falls to cause edge drooping.

Therefore, a large number of pressing members are arranged in a row in the width direction of the material feeding passage, and each pressing member is driven individually by an air cylinder, and only the required pressing members are operated according to the width of the processed material w. JP-A-1-246063 discloses a structure in which the stepping pressure is exerted on the upper surface of the processed material, and the stepping pressure on the side of the processed material is removed to prevent edge drift of the processed material. Have been proposed as disclosed in.

[Problems to be Solved by the Invention] As shown in FIG. 5, the structure of these pedal pressure devices a has a sliding groove c formed in a pedal pressure frame b, and a pressing member d at the lower end.
A tread pressure bar e fixed to is held by a pressure device so that it can be moved up and down, and an elastic body g made of sponge or the like is disposed in contact with the lower surface of the pressing lever e. It is covered with a wear resistant cloth h fixed on both sides.

By the way, in the above-mentioned conventional configuration, the opening groove portion is narrowed at the lower end of the pedaling frame b to form the locking edges i, i,
The lower position of the pressing member d is limited by the locking edges i, i.

However, if such a limitation is provided, there is an error in the thickness of the processed material, and if the thickness is, for example, 1 mm or more, the pressing member d is restricted from descending. It has been found that does not work and causes unevenness in grinding and polishing.

The present invention is intended to provide a pedaling device that does not have such problems.

[Means for Solving the Problems] The present invention provides a width of a feeding passage in a treading frame disposed inside a feeding passage-side running portion of an endless sanding belt that is wound around a belt driving mechanism. A plurality of sliding grooves are provided along the direction, the lower end of each sliding groove is communicated with the opening groove part along the sliding groove row, and the tread pressure bar can be vertically moved by each pressurizing device to each sliding groove. The pressing member to each tread bar within the opening groove, and the lower surface of the pressing member row is covered with an elastic body such as sponge in a contact state, and this elastic body is fixed to both lower surfaces of the tread frame. In a wide belt sander machine equipped with a treading device that is covered with a wear resistant cloth that covers the opening groove portion, the pressing member is optionally moved up and down at the lower part of the treading frame as a non-coupling with the inner peripheral wall of the opening groove portion. The feature is that it is possible.

[Operation] In the above-described configuration, since the locking edge is removed from the lower end of the pedal pressure frame and the pressing member is not linked to the pedal pressure frame, the pedal pressure of the pressing member is not significantly restricted. Therefore, even if the processed material is thin, the surface can be properly pressed to perform uniform grinding and polishing.

[Embodiment] An embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows an upper surface grinding type wide belt sander equipped with a single grinding head, in which a running material belt 4 is provided under a main body frame 1 between a driving traveling roll 2 and a driven traveling roll 3. Is provided, and the upper surface thereof is used as the material feeding passage 6. The drive traveling roll 2 is drive-controlled by a drive motor M.

A sanding frame 7 is provided on the main body frame 1 at a position above the running material device 5, and a grinding head is mounted on the flexible frame 1. That is, a steering roller 8 is provided at the upper end of the sanding frame 7, and a large-diameter drive roll 9 and a driven roll 10 are provided at the lower end of the sanding frame 7 to form a drive mechanism. Sanding belt 11 is hung around. Further, a treading device 12 is arranged on the sanding frame 7 between the rolls 9 and 10.

 2 and 3 show the structure of the pedaling device 12.

Here, 13 is a mounting frame fixed to the sanding frame 7 and arranged between the rolls 9 and 10, and a treading frame 14 is suspended from the mounting frame 13. Plural rows of sliding grooves 16 are provided in the treading frame 14 along the width direction of the material feeding passage, and the lower ends of the sliding grooves 16 communicate with the opening groove portions 23 along the sliding groove row. The tread pressure bar 15 is vertically movably inserted into each sliding groove 16 and held therein, and a spring 17 attached to the sliding groove 16 around the tread bar 15 urges the tread pressure bar 15 upward.

A pressing member 18 is fixed to the lower end of each treading bar 15 in the opening groove portion 23, and an elastic body 19 made of sponge or the like contacts so as to cover a large number of pressing members 18 from the lower surface.
Is covered with a wear resistant cloth 20 that covers the opening groove 23 fixed to both lower surfaces of the pedaling frame 14.

The upper end of the tread bar 15 is connected to the piston rod of the air cylinder 22 fixed to the mounting frame 13, and the compressed air is introduced into the air cylinder 22 to move the piston 21.
Is lowered in the air cylinder 22 against the rib 17 so that the lower surface of the pressing member 18 is brought into pressure contact with the inner surface of the elastic body 19.

The air cylinder 22 is connected to an air source and controls the inflow of pressurized air in synchronization with the arrival of the processed material. As disclosed in Japanese Patent Laid-Open No. 1-246063, the air cylinder 22 may be selectively connected to the low pressure air source and the high pressure air source according to the state of the processed material.

In addition, the material feeding passage 6 before and after the sanding frame 7
A pressing roll 25, which is pressed against the running material device 5 side by a bullet, is provided on the upper portion, and a detection roll 26 is disposed adjacent to the pressing roll 25. The number of the detection rolls 26 is equal to the number of the pressing members 18 and corresponds to the pressing members 18 before and after. The detection roll 26 is connected to the pressing member 18
More than this, various configurations have been proposed so far, such that the pressure to the air cylinder 22 can be selectively adjusted as described above, and even if such a configuration is applied. good.

The sensor S is actuated by the rise of the detection roll 26 accompanying the supply of the processing material to detect the supply of the processing material, and in synchronization with the arrival of the processing material, the introduction control of the pressure air into the air cylinder 22 is controlled. Give.

In the above structure, the pressing member 18 is not linked to the inner peripheral wall of the opening groove portion 23. Therefore, the pressing member 18 is almost free in the up-and-down direction.

 The operation of this configuration will be described.

When the work material w is supplied, 26 rises corresponding to the width direction thereof, and in synchronization with the arrival of the work material w at 12, the air cylinder 22 of the pressing member 18 corresponding to the width of the work material w. Pressurized air is introduced into the pressing member 18, and the pressing member 18 is pressed.

At this time, the pressing member 18 is not restrained from moving downward except by the wear resistant cloth 20. Therefore, even if there is a thin portion x due to the thickness error of the processed material w, the pressing member 18 descends following the thin surface as shown in FIG. 4, and the pedal pressure is appropriately applied to the surface. It will be. And this
Appropriate grinding and polishing can be performed for thicknesses of about 1 to 1.5 mm.

In the above-mentioned configuration, the pressing member 18 group row is provided in one row along the traveling direction, but as disclosed in Japanese Patent Application No. 1-252617, it is provided in a plurality of rows such as three rows. Can also be applied. Then, in a configuration in which three rows are provided, the central portion of which serves as the deep tread portion and the both sides thereof serve as the reference tread portions, the present invention is applied only to the central deep tread portion, and the pressing member 18 can be freely moved up and down. The reference treading portions on both sides thereof may be provided with locking edges i, i (see FIG. 5) as in the conventional configuration to restrain the downward movement.

[Advantage of the Invention] As described above, according to the present invention, the tread pressure bar 15 having the pressing member 18 fixed at the lower end can be moved up and down by the pressure device 22 in the plurality of sliding grooves 16 formed in the tread pressure frame 14. A treading device that holds and further arranges an elastic body 19 made of sponge or the like in contact with the lower surface of the pressing member 18 row, and covers the elastic body 19 with wear resistant cloth 20 fixed to both lower surfaces of the treading frame 14. In the lower part of the treading pressure frame 14, the pressing member 18 is not linked to the treading pressure frame 14 and can be arbitrarily moved up and down. Therefore, the processed material w has a thin portion. In addition, it is possible to exert a pedaling pressure by the pressing member 18 even on the thin surface thereof, so that there is an excellent effect that the workpiece w can be extremely easily ground and polished.

[Brief description of drawings]

FIG. 1 is a schematic front view of a wide belt sander machine, FIG. 2 is a vertical sectional front view of a treading device 12, FIG. 3 is a vertical sectional side view, and FIG.
The figure is a partially enlarged vertical sectional front view showing the operation of the pedaling device 12. Further, FIG. 5 is a vertical sectional front view of the conventional pedaling device 12. 11 ... Sanding belt 12 ... Treading device 14 ... Treading frame 15 ... Treading bar 16 ... Sliding groove 18 ... Pressing member 19 ... Elastic body 20 ... Wear resistant cloth 22 ... Air cylinder 23 ... Opening groove 26 ... Detection roll

Claims (1)

(57) [Scope of utility model registration request] 1. A plurality of sliding grooves are provided along a width direction of a material feeding passage on a treading frame disposed inside a material feeding passage side running portion of an endless sanding belt which is suspended by a belt driving mechanism. By arranging in rows, the lower ends of the sliding grooves are communicated with the opening groove portions along the sliding groove row, and the tread pressure bars are inserted into the respective sliding grooves so that they can be lifted and lowered by a pressurizing device. A pressing member is fixed to each tread pressure bar, and the lower surface of the pressing member row is covered with an elastic body such as a sponge in a contact state. The elastic body is fixed to both lower surfaces of the tread pressure frame with a wear resistant cloth covering the opening groove portion. In a wide belt sander machine having a covered treading device, the pressing member is not connected to the inner peripheral wall of the opening groove portion at the lower part of the treading frame, and is capable of being optionally moved up and down. Belt treader treading device.