Information
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Patent Grant
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6769974
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Patent Number
6,769,974
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Date Filed
Friday, November 1, 200221 years ago
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Date Issued
Tuesday, August 3, 200419 years ago
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Inventors
-
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Examiners
Agents
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CPC
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US Classifications
Field of Search
US
- 451 355
- 451 513
- 474 101
- 474 109
- 474 115
- 474 150
- 474 117
- 474 125
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International Classifications
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Abstract
A sand-belt finishing machine having a sand-belt replacement mechanism includes a support rack, a first roller, a second roller, an upright rod, an elastic member, a sand belt, and a pull lever. When the upright rod is moved by the pull lever to compress the elastic member, the distance between the first roller and the second roller is shortened. When the upright rod is released by the pull lever, the upright rod is returned to its original position by the elastic member, so that the distance between the first roller and the second roller is increased. Thus, the sand belt can be mounted on and detached from the first roller and the second roller rapidly, easily and conveniently, thereby facilitating the user replacing the sand belt.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a sand-belt finishing machine having a sand-belt replacement mechanism, and more particularly to a sand-belt finishing machine having a sand-belt replacement mechanism, wherein the sand belt can be assembled and disassembled rapidly, easily and conveniently, thereby facilitating the user replacing the sand belt.
2. Description of the Related Art
The sand-belt finishing machine is a working machine that is used to finish the surface of the wooden material. As shown in
FIG. 1
, a conventional sand-belt finishing machine (not shown) in accordance with the prior art comprises a transverse roller
11
, and a sand belt
12
wound around the surface of the roller
11
. When in use, the wooden material is passed through the lower side of the roller
11
which is being rotated, so that the wooden material is rubbed and finished by the sand belt
12
on the surface of the roller
11
, thereby achieving a finishing effect. However, when the sand belt
12
needs to be replaced, the user has to remove the worn sand belt
12
from the roller
11
, and has to wind a new sand belt
12
around the roller
11
, thereby consuming much time, and thereby causing inconvenience to the user.
SUMMARY OF THE INVENTION
The present invention has arisen to mitigate and/or obviate the disadvantage of the conventional sand-belt finishing machine.
The primary objective of the present invention is to provide a sand-belt finishing machine having a sand-belt replacement mechanism, wherein the sand belt can be assembled and disassembled rapidly, easily and conveniently, thereby facilitating the user replacing the sand belt.
Another objective of the present invention is to provide a sand-belt finishing machine having a sand-belt replacement mechanism, wherein the sand belt can be assembled and disassembled rapidly, easily and conveniently, thereby saving the working time.
In accordance with the present invention, there is provided a sand-belt finishing machine having a sand-belt replacement mechanism, comprising:
a support rack;
a first roller mounted on the support rack;
a second roller located in parallel with the first roller, and spaced from the first roller with a determined distance;
an upright rod secured on a bottom face of the support rack;
an elastic member mounted on the upright rod;
a sand belt mounted on the first roller and the second roller; and
a pull lever connected to the upright rod to drive the upright rod to move; wherein:
when the upright rod is moved by the pull lever to compress the elastic member, the distance between the first roller and the second roller is shortened; and
when the upright rod is released by the pull lever, the upright rod is returned to its original position by the restoring force of the elastic member, so that the distance between the first roller and the second roller is increased.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1
is a partially perspective view of a conventional sand-belt finishing machine in accordance with the prior art;
FIG. 2
is a perspective view of a sand-belt finishing machine having a sand-belt replacement mechanism in accordance with a preferred embodiment of the present invention;
FIG. 3
is a partially perspective view of the sand-belt finishing machine having a sand-belt replacement mechanism in accordance with the preferred embodiment of the present invention;
FIG. 4
is a schematic front plan view of the sand-belt finishing machine having a sand-belt replacement mechanism as shown in
FIG. 3
; and
FIG. 5
is a schematic operational view of the sand-belt finishing machine having a sand-belt replacement mechanism as shown in
FIG. 4
in replacement of the sand belt.
DETAILED DESCRIPTION OF THE INVENTION
Referring to the drawings and initially to
FIGS. 2-4
, a sand-belt finishing machine having a sand-belt replacement mechanism in accordance with a preferred embodiment of the present invention comprises a main body
20
, a first roller
22
mounted on the main body
20
, and a second roller
24
mounted on the main body
20
.
The first roller
22
and the second roller
24
are in parallel with each other. The first roller
22
is mounted on a support rack
26
. An upright rod
32
is secured on a bottom face
28
of the support rack
26
. The upright rod
32
is extended through an upper bracket
36
and a lower bracket
38
of a support frame
34
. An elastic member
42
is mounted on the upright rod
32
, and has a first end urged on the bottom face
28
of the support rack
26
and a second end urged on the upper bracket
36
of the support frame
34
. A locking shaft
44
is mounted on a surface of the upright rod
32
. A pivot base
47
is mounted on the lower bracket
38
of the support frame
34
. A pull lever
46
is pivotally mounted on the main body
20
, and has a first end pivotally mounted on the pivot base
47
and a second end extended outward from the main body
20
. The pull lever
46
has a mediate portion formed with an elongated slot
48
to receive the locking shaft
44
of the upright rod
32
, so that the locking shaft
44
of the upright rod
32
is slidably mounted in the elongated slot
48
of the pull lever
46
. A sand belt
50
having a loop shape is mounted on the first roller
22
and the second roller
24
.
During the normal use, the first roller
22
and the second roller
24
are rotated synchronously to drive the sand belt
50
to rotate. Thus, the wooden material (not shown) is passed through the lower side of the second roller
24
, so that the wooden material is rubbed and finished by the sand belt
50
, thereby achieving a finishing effect.
Referring to
FIGS. 4 and 5
with reference to
FIGS. 2 and 3
, when the user needs to replace the sand belt
50
, the pull lever
46
is pressed downward, so that the upright rod
32
is driven to move downward, and the bottom face
28
of the support rack
26
is driven to move downward to approach the upper bracket
36
of the support frame
34
, thereby compressing the elastic member
42
. At the same time, the pull lever
46
is locked on the main body
20
.
In such a manner, the first roller
22
mounted on the support rack
26
is moved downward, so that the distance between the first roller
22
and the second roller
24
is shortened. Thus, the sand belt
50
can be removed from and mounted on the first roller
22
and the second roller
24
rapidly, easily and conveniently.
Then, after the pull lever
46
is released from the main body
20
, the bottom face
28
of the support rack
26
is pushed to move upward and to move away from the upper bracket
36
of the support frame
34
by the restoring force of the elastic member
42
, so that the first roller
22
mounted on the support rack
26
is returned to its original position, thereby increasing the distance between the first roller
22
and the second roller
24
, so that the sand belt
50
is tightly and closely mounted and stretched on the first roller
22
and the second roller
24
.
Accordingly, in the sand-belt finishing machine having a sand-belt replacement mechanism in accordance with the preferred embodiment of the present invention, the sand belt
50
can be mounted on and detached from the first roller
22
and the second roller
24
rapidly, easily and conveniently, thereby facilitating the user replacing the sand belt
50
, saving the working time, and thereby facilitating maintenance of the sand-belt finishing machine.
Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention.
Claims
- 1. A sand-belt finishing machine having a sand-belt replacement mechanism comprising:a support rack; a first roller mounted on the support rack; a second roller located parallel with the first roller, and spaced from the first roller with a determined distance; an upright rod secured on a bottom face of the support rack; a locking shaft mounted on a surface of the upright rod; an elastic member mounted on the upright rod; a sand belt mounted on the first roller and the second roller; and a pull lever connected the upright rod to drive the upright rod to move and having a mediate portion formed with an elongated slot to receive the locking shaft of the upright rod, so that the locking shaft of the upright rod is slidably mounted in the elongated slot of the pull lever; wherein: when the upright rod is moved by the pull lever to compress the elastic member, the distance between the first roller and the second roller is shortened; and when the upright rod is released by the pull lever, the upright rod is returned to its original position by the restoring force of the elastic member, so that the distance between the first roller and the second roller is increased.
- 2. The sand-belt finishing machine having a sand-belt replacement mechanism in accordance with claim 1, wherein the upright rod is extended through an upper bracket and a lower bracket of a support frame.
- 3. The sand-belt finishing machine having a sand-belt replacement mechanism in accordance with claim 2, wherein the elastic member has a first end urged on the bottom face of the support rack and a second end urged on the upper bracket of the support frame.
- 4. The sand-belt finishing machine having a sand-belt replacement mechanism in accordance with claim 2, further comprising a pivot base mounted on the lower bracket of the support frame, and the pull lever has one end pivotally mounted on the pivot base.
US Referenced Citations (21)