JPH0448919Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention arranges a pressure pad that presses the inner circumferential surface of an endless sanding belt that runs in circulation, and uses it to protect wood, metal, resin, etc. running along the material feeding path. The present invention relates to a wide belt sander that grinds and polishes the surface of a workpiece by pressing the abrasive grain surface of the sanding belt onto the surface of the workpiece.

<Prior art> Conventionally, in a wide belt sander, when the abrasive grain surface of the sanding belt is pressed against the workpiece by the pressure of the tread pad placed on the inner peripheral surface of the sanding belt, as shown in FIG. The sanding belt is blocked on the workpiece a, but in a position where the workpiece a is not present, the sanding belt b is below the surface position of the workpiece a, so both left and right ends c of the workpiece a are inclined. Over-sanding (hereinafter simply referred to as "kake") will reduce the product value, and products with severe creases will be defective. When it comes to painted furniture, building boards, etc., the veneer or paint layer on both left and right ends is often scraped off excessively, causing the base plate to become visible, causing the product to lose value and become unusable. It is a good product, and as a measure to prevent it from becoming damaged, the applicant has previously
-25496 is proposed, in which a pressure relief part consisting of an approximately V-shaped notch or a V-shaped protrusion is provided at both left and right ends of the elastic material plate provided in the tread pressure pad. Therefore, the position where there is no workpiece is prevented by relaxing the pressure of the tread pressure pad, but the positions of the notches or protrusions provided on both left and right ends are changed every time the width of the workpiece changes. It must be changed to match the width of the processed material, and
When the elastic material plate in use is shorter than the width of the changed workpiece, it is irrational to replace the elastic material plate with a longer one, which significantly reduces work efficiency.

<Purpose of the invention> The purpose of the invention is to improve the above-mentioned wide belt sander, so that even if the width of the material to be processed changes, the pressure of the tread pad can be reduced by simply aligning the scale on the feeding side and the scale on the tread pad side. This allows the pressure to be applied in accordance with the width of the workpiece, and also simplifies the operation.

<Structure of the invention> The invention provides a scale for reading the end face of the workpiece located in the left-right direction on the front part of the material feeding mechanism, and a pressure blocking piece with a scale attached to the lower surface of the end of the pressing member is movable left and right. so that when the tip of the pressure blocking piece is aligned with the end face of the workpiece, the scale on the material feeder groove side where the end face of the workpiece is located is the same as the scale on the pressure blocking piece at the end face of the tread pad. This is what I did.

<Operation of the invention> Place the workpiece on the travel positioning table, move the workpiece travel guides placed on the left and right, bring them into contact with the end face of the workpiece, read the scale where the end face of the workpiece is located, and press the tread pad. By pushing and pulling the pressure blocking piece placed at the bottom of the action member and moving it, and aligning the scale attached to the pressure blocking piece with the end surface of the tread pad so that it is the same as the reading scale, the tip of the pressure blocking piece can be accurately adjusted. The end face of the workpiece passes through the position, and the pressing action of the pressing member does not work in the area where the pressing blocking piece is located, and the pressing effect of the pressing member acts only in the position where the pressing blocking piece is not present. The part of the sanding belt where the pressure blocking piece is not located is pressed against the processing surface of the workpiece, and the part of the sanding belt where the pressure blocking piece is inserted is not pressed, so it is located above the processing surface of the workpiece. . Further, since the sanding belt at the end of the workpiece starts at a position away from the end of the workpiece and escapes upward in an inclined manner, no dents occur at the end of the workpiece.

<Example> An example of the present invention will be described with reference to the accompanying drawings. Figure 5 shows an example of a wide belt sander to which the present invention is applied, where 1 is the main body frame, 2
1 is a material feeding guide table that is raised and lowered by a lifting screw 4 when the lifting handle 3 is rotated, and a driven roll 5 is arranged at the front of the table, and a driving roll 6 is mounted on a shaft at the rear of the table. A timber belt 7 is stretched over it. 8 is a sanding frame provided on the upper part of the frame 1 in correspondence with the material feeding guide table 2, a driving roll 9 is mounted on the lower front part of the sanding frame, a driven roll 10 is mounted on the rear part of the sanding frame, A tension roll 11 that can move up and down is provided on the upper part, and an endless sanding belt 12 is wrapped around a drive guide mechanism consisting of the drive roll 9, driven roll 10, and tension roll 11.

Reference numeral 13 denotes a mounting portion of a treading pad 14 facing the upper part of the sanding part of the sanding belt 12 between the driving roll 9 and the driven roll 10,
A tread pressure pad 14 is inserted into the mounting portion from the lateral direction.The tread pressure pad 14 is provided by forming a device groove 16 with an open bottom surface in the pad frame 15, and engaging the lower end of the corresponding inner wall surface with a flange 17 at the front and back. An air bag 18 having a square cross section is installed in the device groove 16, and a pressure air supply pipe 19 is connected to the side thereof. On the lower surface of the air bag 18, a thin spring plate 21 is attached above and below a plurality of pins 20 arranged in parallel in the material feeding direction.
21 is placed between them, and an elastic material plate 22 made of sponge, rubber, felt, etc. is placed below it.
The lower surface of the elastic material plate 22 is covered with a slippery, abrasion-resistant flexible covering plate 23 such as canvas, and the covering plate 23 is hung on each lower surface of the front and rear locking collars 17 and fixed with bolts 24. A press-blocking piece 27 having an inclined surface 25 at its tip and a storage groove 26 for the elastic material plate 22 at its lower part is engaged so as to push up the spring plates 21, 21 holding the pin 20 between them. It is inserted so that it can be moved from side to side by hanging it over the front and back of the upper surface of the collar 17.

Furthermore, a push/pull operation hole 28 is provided at the other end of the inclined surface 25 of the press blocking piece 27, and a scale 29 starting from zero from the operating hole 28 side is provided on the flat surface 30 of the press blocking piece 27.
are engraved on the front and rear sides 31, 32, and the length of the press blocking piece 27 is such that the zero point position of the scale 29 is
The length is determined so that the tip 35 of the press blocking piece 27 is located at the center of the material feeding path 36 when positioned on the left and right end surfaces 33, 34 of the treading pressure pad 14, respectively.

In the above description, instead of the air bag 18, another pressing member such as a coil spring may be used.

Further, the material feeding guide table 2 on the work material insertion side where the driven roll 5 is disposed is provided with a travel positioning table 38 for the work material 37, and the table 38 has a zero point at the center of the material feeding path 36. Scales 39 starting from center zero are engraved on both left and right ends at the same intervals as the scales 29, and guide grooves 40 are provided in the left and right directions perpendicular to the material feeding direction. Two sets of workpiece travel guides 41 are arranged on the left and right sides, each of which is made movable in the left and right directions orthogonal to the feed direction by fitting the movement guide protrusion 42 provided at the lower part into the guide groove 40.
43 is a lock handle of the traveling guide 41.

The function and operation of the above embodiment will be explained.

Place the workpiece 37 on the travel positioning table 38, move the workpiece travel guides 41 arranged on the left and right to contact both left and right end surfaces of the workpiece 37 so that the workpiece 37 can travel, and then use the lock handle 43 to The traveling guide 41 is fixed. Next, processed material 3
The codes such as numbers on the scale 39 on which the left and right end surfaces of the pad 7 are located are read and memorized, and the codes such as numbers on the scale 29 are read and memorized by pushing and pulling the pressure stops 27 arranged on the left and right sides of the tread pad 14, respectively. By matching the same number as the memorized number to the left and right end surfaces 33 and 34 of the tread pressure pad 14, the tip 35 of the press blocking piece 27 is placed at a position where the workpiece 37 passes through both left and right end surfaces. That is, in the embodiment of the present invention, the code (number) on the scale 39 side can read 200 on both the left and right sides, so push and pull the pressure blocking piece 27 to read the code (number) 200 on the scale 29 side at the left and right end surface position 33 of the treading pad 14.
34 respectively.

Therefore, in the device groove 16 of the tread pad 14, the pressing action of the air bag 18 does not work at all in the part where the pressing blocking piece 27 is located, and the pressing of the air bag 18 is prevented by the presence of the pressing blocking piece 27. Only the position is pressed. That is, as shown in FIG. 3, the part of the sanding belt 12 where the pressure blocking piece 27 is not located is pressed against the processing surface of the workpiece 37, and the part of the sanding belt 12 where the pressure blocking piece 27 is inserted is not pressed. Since the sanding belt 12 is located above the machined surface of the workpiece 37, the condition of the sanding belt 12 at both the left and right ends of the workpiece 37 is such that it slopes upward from the position away from the edge of the workpiece. This prevents the left and right ends of the workpiece from being bent, and the surface is finished flat.

In this embodiment, the press blocking pieces 27 are provided on both the left and right sides, but if the workpiece 37 is placed at one end of the material feeding path and moved to one end of the elastic material plate 22, the press blocking pieces 27 are provided on both the left and right sides. It is sufficient to provide the blocking piece 27 only on one side.

Also, the scales 39, 29 have zero at the center on the scale 39 side, and the operation hole 28 on the scale 29 side.
On the opposite scale 39 side, the center is the maximum number, zero is on both left and right ends, and on the scale 29 side, the operation hole side is the maximum number, and the inclined surface 25 side is engraved with zero. It can also be used.

<Effects of the invention> As explained in detail in the above embodiments, the invention has the following advantages:
A scale for reading the end face of the workpiece is provided in the front part of the material feeding mechanism to be located in the left and right direction, and a pressure blocking piece with a scale is provided on the lower surface of the end of the pushing member so as to be movable left and right. When aligned with the end face of the workpiece, the scale on the material feeding mechanism side where the end face of the workpiece is located is the same as the scale on the pressure blocking piece at the end face of the tread pad, so the width of the workpiece changes. By simply aligning the scale on the material feed side and the scale on the tread pad, the pressure of the tread pad will be accurate according to the width of the workpiece, making the operation extremely easy and significantly improving work efficiency. This has the effect of improving the product value by eliminating the edges of the processed material.

[Brief explanation of the drawing]

Attached drawings Figures 1 to 6 show an embodiment of the present invention. Figure 1 is a partially cutaway plan view of a wide belt sander, Figure 2 is an enlarged plan view of the main parts, and Figure 3 is a diagram showing an enlarged view of the main parts. A similar partly cut-away partially longitudinal section enlarged front view, Fig. 4 is a longitudinal section side view of the tread pad, Fig. 5 is a schematic side view of the wide belt sander, and Fig. 6 is an enlarged perspective view of the press blocking piece. FIG. 7 is an explanatory diagram showing grinding and polishing using a conventional tread pad. 7... Material feeding belt, 12... Sanding belt, 14... Pressure pad, 18... Air bag, 27
... Pressure blocking piece, 29... Scale, 35... Pressure blocking piece tip, 36... Material feeding path, 39... Scale, 41
...Processed material travel guide.

Claims (1)

[Scope of utility model registration request] An endless sanding belt is installed in the belt drive guide mechanism corresponding to the work material transport mechanism, and the endless sanding belt is wrapped around the sanding belt so as to run in a circular manner. A pressure member such as a spring and an elastic plate made of sponge, rubber, felt, etc. are attached, and a tread pad made of a wear-resistant flexible covering plate is arranged, and the outer circumferential surface of the sanding belt is In a wide belt sander that grinds and polishes the workpiece by pushing it out toward the material feeding mechanism and bringing it into contact with the surface of the workpiece, a scale for reading the end face of the workpiece is provided in the front part of the material feeding mechanism in the left and right direction, and the edge of the pressing member is A pressure blocking piece with a scale is provided on the lower surface so as to be movable left and right, and when the tip of the pressure blocking piece is aligned with the end surface of the workpiece, the scale on the material feeding mechanism side where the end face of the workpiece is located and the tread pressure. A wide belt sander characterized in that the scale of the pressure blocking piece at the end face position of the pad is the same.