JPS628991Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention provides a padded support box corresponding to the inner surface of the endless sanding belt at a position where it comes into contact with the conveyed material on the running path of the endless sanding belt, and
A large number of treading thin plates for mold surface forming whose tip edges protrude from the surface corresponding to the inner surface of the belt of the support box are superimposed and inserted into and out of the support box, and the tip surfaces of the large number of treading thin plates can be freely converted. In the device that constitutes the pad surface, a flexible material plate is provided to cover the pad surface constituted by each of the tread pressure thin plates, and each tread pressure thin plate and the tip edge of each tread pressure thin plate of each flexible material plate are provided. The corresponding inner surface is engaged by fitting.

Conventionally, a device is known in which a large number of thin tread plates are slidably attached to a pad support box. Then, the other end surface of each treading thin plate that does not correspond to the inner surface of the belt is pushed by fingertip pressure, air pressure sent from a pressurized air pipe provided in the support box, etc., so that the thin plates are individually slid. However, in the above structure, each tread pressure plate is individually slid by pressing with finger pressure, air pressure, etc., and this sliding creates relative unevenness on each tip surface to form a convertible pad surface. However, since these tread pressure plates require rigidity and wear resistance, they use thin metal plates, so the flexible pad surface that is constructed by moving the tips of these thin metal plates in different steps is This creates a hard step. Conventionally, after forming these uneven pad surfaces, they were covered with cloth, felt, etc. to create a smooth pad surface. However, with flexible pads, it is necessary to perform trial polishing of the curved material after molding and to make corrections in most cases, but this is done by removing the cloth, felt, etc. mentioned above, and then removing it again after correction. It had the annoying drawback of having to reapply things. The present invention aims to improve these drawbacks.

A preferred embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a plan view showing an example of a belt sander for polishing a curved surface, in which a curved surface 52 extending in the material feeding direction is formed on the side surface, and the sanding frame 1 is arranged to correspond to the running path of the workpiece 51. A drive roll 2 and a guide roll 3 provided on the turret, and a steering/tension roll 4 whose oscillation is free to a certain extent are mounted in a triangular arrangement as shown in the figure.
An endless sanding belt 5 is passed around each roll. Further, a treading mechanism mounting part corresponding to the inner surface of the belt 5 is formed between the rolls 2 and 3, a support frame 6 is attached to the mounting part, and the treading cylinder 7 is supported by the frame 6 in the front-rear direction. The protruding rear end of the rod 8 inserted into the cylinder is provided with a locking metal 9 whose back and forth movement can be adjusted freely by spiral rotation.
Insert into. A small stroke air cylinder 10 is fixed to the support frame 6, and is fixed to the front end of a rod 11 of the cylinder. 13, 13 are a pair of guide rods fixed to the movable plate 12, each rod 13 is inserted into a sliding bearing 14, 14 attached to the support frame 6, and each rod 1
A pair of left and right support pieces 16, 16 in Fig. 1 are attached to the tips of 3.
Pad support frames 15, 15 protruding to the front are fixed, and each support piece 16, 16 has a screw shaft rod 17,
17, and fit both wing springs of the pad holder 18 onto each of the threaded shaft rods, and a pad support box 19 (FIG. 2) is fitted into the upper center of the holder 18 and fixed.

The padded support box 19 has a tip end surface 32 attached to the support box 1.
A very large number of tread pressure thin plates 31 protruding from the surface corresponding to the inner surface of the belt 5 of No. 9 are provided parallel to the feeding direction of the processed material 51, and each thin plate 31 is freely moved in the above-mentioned protruding direction and retraction direction. Insert it so that it can be moved to. A sliding elongated hole 33 is provided in the thin tread plate 31, and a guide rod 34, which is extended vertically within the pad support box 19, is loosely fitted into the hole 33.
figure).

The tip surface 32 of each tread pressure plate 31 is provided with one T-shaped notch 35 as shown in FIG. 4, or two T-shaped notches 35 are provided in parallel as shown in FIG. When the tip surfaces 32 are arranged in a plane as shown in the figure, the T-shaped notches 35 are aligned to form a large T-shaped notch 35a. Reference numeral 36 denotes a flexible material plate made of rubber, synthetic resin, etc., which has an area to be bonded to the tip end surface of the front tread pressure plate 31, and the one shown in FIG. 4 has a single T-shaped protrusion 3 on its inner surface.
7, and the one in Figure 5 has two parallel T-shaped protrusions 3.
7, and their T-shaped protrusions 37 are T-shaped notches 35.
a and insert the flexible material plate 36 into each tread pressure plate 3.
A fitting engagement is applied to the distal end surface 32 of 1. The length of the flexible material plate 36 in the height direction H is equal to that of the tread pressure thin plate 31.
It can also be made slightly larger than the stacking height H'.

This figure shows an example of the fitting shape of the T-shaped protrusion 37 of the flexible material plate 36 with respect to the T-shaped notch of each of the tread pressure thin plates 31 described above, and if it can be fitted in this way, it is T-shaped. Notch 35, T-shaped protrusion 37
may have any shape.

In this embodiment, a pad that can be freely converted at the tip surface is constructed by sliding each tread pressure thin plate 31 to follow the curved surface 52 of the processed material 51 in a male-female relationship.
The flexible material plate 36 first constitutes the surface of the flexible pad, on which each tread plate 31 slides. However, when the tip surface 32 of the thin tread pressure plate 31 is operated to protrude or retract as required in order to correct the pad surface, the flexible material plate 36 follows the corrected pad surface.

The outer surface of the flexible material plate 36 is connected to the padded support box 19.
The workpiece 51 is further covered by a wear-resistant thin plate 41 (FIG. 2) attached to the corresponding surface. However, by extending both the left and right ends of the flexible material plate 36 in FIGS. 4 and 5, and attaching the extended portions directly to the pad support box 19 as shown in FIG. 1, the use of the wear-resistant thin plate 41 is omitted due to this configuration. You can also.

As clarified from the above explanation, the present invention is such that a flexible material plate 36 is fitted onto the tip surface 32 of a large number of thin tread plates 31 which are superimposed and inserted into and out of a pad support box. The flexible material plate 36 covers the pad surface which is freely formed by stepped unevenness based on the free movement of the tip surface of the pad 31.
This eliminates the need to apply a flexible material plate to the pad surface formed by the tip surface of the pad, or to remove and apply it each time the pad surface is modified. This has the effect of greatly simplifying the work of changing or modifying the shape of the flexible pad.

[Brief explanation of the drawing]

The attached drawings show an embodiment of the present invention, in which Fig. 1 is a plan view, Fig. 2 is a partially cutaway plan view of the pad support box 19, Fig. 3 is a vertical sectional side view of the central part thereof, and Figs. 4 and 5. FIG. 2 is an exploded perspective view of the main parts of the present invention. 5 → sanding belt, 18 → padded support bracket, 19 → padded support box, 31 → tread pressure thin plate, 32
→ Tip surface, 36 → Flexible material plate.

Claims (1)

[Scope of utility model registration request] A padded support box corresponding to the inner surface of the belt is provided at a position where the endless sanding belt comes into contact with the conveyed material on the running path, and a leading edge of the support box protrudes from the surface corresponding to the inner surface of the belt. In an apparatus in which a large number of treading thin plates for forming a mold surface are superimposed and inserted into and out of the support box, and a convertible pad surface is formed by the tip surfaces of the large number of treading thin plates,
A flexible material plate is provided to cover the pad surface constituted by each of the thin tread plates, and each of the thin tread plates is fitted with the inner surface corresponding to the tip edge of the thin tread plate of each flexible material plate. A flexible pad for a curved surface sander for woodworking that is characterized by being engaged.