Supports – Brackets – Specially mounted or attached
Reexamination Certificate
1999-03-09
2001-04-03
Ramirez, Ramon O. (Department: 3632)
Supports
Brackets
Specially mounted or attached
C248S219400, C248S231710
Reexamination Certificate
active
06209832
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a holder for a reference projected light detector, which is used to fix a reference projected light detector for receiving a laser beam projected from a laser survey instrument to a staff, a rod, etc.
The reference projected light detector is known as a system to detect a reference plane, which is formed by a laser beam projected from a rotary laser irradiation system by rotary irradiation. In particular, in case a reference plane is formed by an invisible light laser beam, the reference projected light detector as described above is indispensable. Description will be given now on the reference projected light detector referring to FIG.
4
.
The reference projected light detector
1
comprises a light detecting unit
2
for detecting a laser beam, a display unit
3
, a bubble tube
4
, an index notch
5
, operation switches
6
, a buzzer
7
, etc.
The rotary laser irradiation system is operated in such manner that the laser beam is projected across the reference projected light detector
1
. When the laser beam is received by the light detecting unit
2
, one of displays
3
a
,
3
b
or
3
c
of the display unit
3
is turned on depending upon the light receiving or photodetecting position. For example, if it is higher than the reference position, i.e. the position of the index notch
5
, the display
3
a
flashes and gives instruction to the operator that the reference projected light detector
1
should be moved down. If the photodetecting position is an adequate position, the display
3
b
is displayed, and the buzzer
7
will sound. When the reference projected light detector
1
is supported at an adequate position, marking is performed using the index notch
5
.
To use the reference projected light detector
1
, an operator holds it in hands and use it by applying it on wall, or it is fixed on a staff
8
as shown in FIG.
5
and is used.
The rotary laser irradiation system
10
is placed on a tripod
11
, and the laser beam is projected in a horizontal direction. The reference projected light detector
1
is fixed on the staff
8
via a holder
12
. The reference projected light detector
1
fixed on the staff
8
is used, for example, for pile driving operation.
In the pile driving operation, piles are driven in such manner that the upper ends of the piles come to a predetermined height. On the upper end of the piles thus driven, the staff
8
with the reference projected light detector
1
fixed on it is erected approximately in a vertical direction, and the holder
12
is moved up or down along the staff
8
to receive the laser beam, and the position of the reference projected light detector
1
is adjusted in a vertical direction. As described above, using the photodetecting position with respect to the reference projected light detector
1
as a reference position, the height of the photodetecting position of the reference projected light detector
1
is read from the staff
8
by the operator. If the height of the photodetecting position is not yet at the predetermined height, amount of driving of the piles are not enough, and the pile driving operation should be continued.
As described above, in the operation to confirm the driving height of the piles, the holder
12
is moved up or down with respect to the staff
8
. To move the holder
12
and fix it, a clamp knob
13
equipped in the holder
12
is loosened or tightened.
Referring to
FIG. 6
, description will be given now on a conventional type holder
12
.
When seen from above, the holder base
15
is designed in approximately S-shape. In one of recesses of the holder base
15
, the reference projected light detector
1
is accommodated and fixed. The staff
8
is inserted vertically into another recess. The clamp shaft
13
a
of the clamp knob
13
is designed as a screw, and the clamp shaft
13
a
is screwed into the holder base
15
in a horizontal direction, and its tip is abutted on the staff
8
.
To fix the reference projected light detector
1
, the clamp knob
13
is tightened, and the tip of the clamp shaft
13
a
is pressed against the staff
8
. In case the reference projected light detector
1
is moved, the clamp knob
13
is loosened, and the holder
12
is moved along the staff
8
. To perform positioning of the reference projected light detector
1
, the clamp knob
13
is tightened when the photodetecting position is aligned with the reference position, and the reference projected light detector
1
is fixed on the staff
8
via the holder
12
.
The upper ends of the driven piles serves as a reference for height and it is used as a horizontal reference by stretching a leveling string on the upper ends of the piles. In this respect, several tens of piles are driven in normal case. In the pile driving operation, height measurement with respect to the laser beam reference plane using the reference projected light detector
1
must be performed at least by several times per pile, and the height of the holder
12
with respect to the staff
8
must be adjusted each time. For this reason, the clamp knob
13
must be loosened or tightened frequently. Moreover, during loosening or tightening of the clamp knob
13
, the reference projected light detector
1
must be supported by hands so that it may not fall down. Also, another operator must hold the staff
8
, and the operation must be performed by two operators. Further, the component member to support the reference projected light detector
1
is not limited to the staff
8
, and a mere timber may be used for convenience. In this case, the reference projected light detector
1
does not slide well over the timber, and it is often difficult to perform fine position adjustment.
SUMMARY OF THE INVENTION
To solve the above problems, it is an object of the present invention to provide a holder for a reference projected light detector, by which it is possible to perform fixing and releasing of the reference projected light detector to the staff member by a single handed operation, to smoothly move the holder over the staff member, and to easily carry out fine position adjustment.
The holder for a reference projected light detector according to the present invention comprises a mounting assembly for mounting the reference projected light detector and a fixing assembly for fixing the detector on a staff member, wherein the fixed assembly comprises a clamp knob with a tip thereof being adjustable in association with a width of the staff member and a clamper rotatably provided and facing to the clamp knob, and the staff member is squeezed between the clamp knob and the clamper by rotation of the clamper. Further, the holder for the reference projected light detector according to the present invention comprises a baseplate portion where the reference projected light detector is mounted, a guide portion extending in a horizontal direction from the baseplate portion, a clamp knob having a horizontal shaft and screwed into the guide portion, a clamper rotatably arranged on a side of the baseplate portion opposite to the surface where the reference projected light detector is mounted, the clamper comprises a locking portion extending toward the clamp knob and a grip extending in a direction to cross the locking portion, wherein the staff member is squeezed between the locking portion and the clamp knob by rotation of the clamper. Also, in the holder for the reference projected light detector of the present invention, the clamper comprises a locking portion projecting toward the clamp knob and a grip extending in a perpendicular direction from the locking portion. Further, in the holder for a reference projected light detector according to the present invention, upper roller and lower roller are provided to face to the clamp knob, a tip of the locking portion of the clamper is positioned between the upper roller and the lower roller, and the tip of the locking portion can be projected from a common tangential line of the two rollers toward the staff member by rotation of the clamper. Further, in the h
Kabushiki Kaisha Topcon
Nields & Lemack
Ramirez Ramon O.
LandOfFree
Holder for reference projected light detector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Holder for reference projected light detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Holder for reference projected light detector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2480054