GB2177328A - An improved drill for pearl or the like - Google Patents

Abstract

A drill for pearl or the like comprises a rectangular table 1 provided at the opposite short sides with a pair of lugs 11. A first main shaft 9 provided with a pair of sliding blocks 5, 6 and a pair of positioning blocks 7, 8 is supported by the lugs of the table. A pair of drilling heads (552, 652, Fig. 3) opposite to each other are respectively secured to said sliding blocks. A second main shaft 30, provided with a disk member 40 is supported by the lugs of the table. The disk member provided with a plurality of holes (402, Fig. 3) to receive the pearls is disposed between said drilling heads with one of the holes aligned with said drilling heads. The sliding blocks associated with the positioning blocks can be driven to move toward the disk member to drill the pearl. The disc 40 is indexed by a projection (661, Fig. 3) engaging between the teeth of a worm gear (404). <IMAGE>

Description

SPECIFICATION An improved drill for pearl or the like This invention relates to an improved drill for pearl or the like.

Conventional drill for pearl or the like usually is operated by foot pedal thereby failing to proceed the drilling operation automatically.

Therefore, the production speed thereof can not be increased. Besides, owing to the larger mechanical friction thereof, the cnetral line of the finished pearl or the like are prone to be eccentric.

It is, therefore, an object of the present invention to obviate and mitigate the abovenoted drawbacks.

It is the primary object of the present invention to provide an improved drill for the pearl or the like which can proceed the drilling operation automatically thereby increasing the production speed thereof.

It is another object of the present invention to provide an improved drill for the pearl or the like which can accurately finish the drilling operation without any defect.

It is another object of the present invention to provide an improved drill for the pearl or the like which can significantly save the working labor.

It is a further object of the present invention to provide an improved drill for the pearl or the like which is practical for use.

BRIEF DESCRIPTION OF THE DRA WINGS FIG. 1 is a perspective view of an improved drill for the pearl or the like according to a preferred embodiment of the present invention; FIG. 2 is a local fragmentary perspective view of FIG. 1; FIG. 3 is a local fragmentary perspective view of FIG. 1; and FIG. 4 is a side view of FIG. 1.

Referring to the drawings and in particular to FIG. 2 thereof, an improved drill for pearl or the like according to a preferred embodiment of the present invention comprises a rectangular table (1). The rectangular table (1) is provided at the opposite short sides with a pair of lugs (11) each having a pair of threaded holes (111) (112) and at the center with a slot (12) and a guiding groove (13).

The rectangular table (1) is further provided with a pair of first and second recesses (14) (15) seperated by the slot (12) and the guiding groove (13) thereof. To the underside of the table (1) is secured a supporting frame (2) on which a linking assembly (3) is disposed.

The linking assembly consists of a pivotal rod (31), a pair of first and second linking rods (32) (33) and a pair of first and second linking members (34) (35). The pivotal rod (31) is pivotally connected to the upperside of the supporting frame (2) by means of a pin (311) while the first and second linking rods (32) (33) are respectively and pivotally connected to the both ends of the pivotal rod (31) by means of the pins (321) and (331). The first linking member (34) is provided with a pair of longer slots (341) and a fixing portion (342).

The first linking member (34) is pivotally connected to the other end of the first linking rod (32) by means of a pin (343) passing through the longer slots (341) thereof meanwhile the fixing portion (342) of the first linking member (34) is arranged to protrude begond the first recess (14) of the table (1). The second linking member (35) is provided at the upper end with a fixing portion (351) and at the lower end with a pulley (352). The second linking member (35) is secured to the other end of the second linking rod (33) by means of a screw (332) or other suitable means meanwhile the fixing portion (351) of the second linking member (35) is arranged to protrude beyond the second recess (15) of the table (1).

A transmission mechanism (4) comprises a pair of bearing seats (41) each having a bearing (411) received therein. A shaft (42) with a eccentric wheel (43) secured thereto is supported by and disposed between the bearing seats (41). The bearing seats (41) are disposed on the underside of the table (1) such that the eccentric wheel (43) thereof is arranged to contact with the pulley (352) of the second linking member (35). The shaft (42) is connected to a motor (44) (FIG. 1). When the shaft (42) is driven to rotate by means of the motor (44), the eccentric wheel (43) thereof will in turn to drive the pulley (352) together with the second linking member (35) to move back and forth thereby making the first linking member (34) driven to move in a similar manner via the first linking rod (32), the pivotal rod (31) and the second linking rod (33).

Referring to FIGS. 1 and 3, a first main shaft (9) is supported by the threaded holes (111) of the lugs (11) of the table (1). A pair of first and second sliding blocks (5) (6) are slidably disposed on the first main shaft (9) and respectively correspond to the first and second recesses (14) (15) of the table (1).

The underside of the first sliding block (5) is secured to the fixing portion (342) of the first linking member (34) such that when the first linking member (34) is driven to move as described hereinbefore, the first sliding block (5) can be shifted along the first recess (14) of the table (1). The first sliding block (5) is provided with a pair of first and second supporting arms (51) (52) seperated by an opening (53) and a fixing block (54). A first drilling shaft (55) with a first pulley (551) secured thereto is supported by the supporting arms (51) (52) and received in the opening (53).

One end of the first drilling shaft (55) projecting from the first supporting arm (51) thereof is provided with a first drilling head (552) hav ing a needle (553) secured thereto. A positioning rod (56) parallel to the first drilling shaft (54) is adjustably connected to the first supporting arm of the first sliding block (5) to be served as a limiting means. A first positioning block (7) adjacent to the first arm (51) of the first sliding block (5) is slidably connected to the first main shaft (9). The first positioning block (7) is provided with a first guiding means (71) through which the needle (553) of the first drilling head (552) can pass to guide said needle to move in a predetermined direction. The first positioning block (7) is arranged to be driven by the first sliding block (5).The underside of the second sliding block (6) is secured to the fixing portion (351) of the second linking member such that when the second linking member (35) is driven to move as described hereinabove, the second sliding block (6) can be shifted along the second recess (15) of the table (1). The relative motion of the first and second sliding blocks (5) (6) are arranged to alternately move toward and away from each other. The second sliding block (6) is provided with a pair of first and second supporting arms (61) (62) seperated by an opening (63) and a fixing block (64). A second drilling shaft (65) with a second pulley (651) secured thereto is supported by the supporting arms (61) (62) and received in the opening (63). One end of the second drilling shaft projecting from the first arm (61) thereof is provided with a second drilling head (652) having a needle (653) secured thereto.

A fixing rod (66) with a needle member (661) secured thereto parallel to the second drilling shaft (65) is secured to the fixing block (64) of the second sliding block (6). A second positioning block (8) adjacnet to the first arm (61) of the second sliding block (6) is slidably connected to the first main shaft (9). The second positioning block (8) is provided with a second guiding means (81) through which the needle (653) of the second drilling head (652) can pass to guide the needle (653) to move in a predetermined direction. The needles (553) (653) thereof are arranged to be aligned with each other by means of the first and second guiding means (71) (81). Also the second positioning block (8) is arranged to be driven by the second sliding block (6). Referring to FIG.

3, a first spring (91) connected to one end of a screw (911) is disposed on the main shaft (9) and located between the first sliding block (5) and the lug (11) of the table (1) while the other end of the screw (911) is threadedly engaged with the threaded hole (111) thereof so that the screw (911) can be removed along the direction of the first main shaft (9) to adjust the resumptive force of the first spring (91). A second spring (92) associated with a screw (921) is disposed on the first main shaft (9) and located between the second sliding block (6) and the lug (11) of the table (1). The screw (921) similar to said screw (911) is used to adjust the resumptive force of the second spring (92). It is noteworthy that the turns of the second spring (92) are more than those of the first spring (91) to provide a larger resumptive force therein.

Referring to FIGS. 1 and 3, a pair of supporting means (10) respectively adjacent to the first and second positioning blocks (7) (8) are secured to the table (1). A short shaft (101) passing through the first and second positioning blocks (7) (8) is supported by the supporting means (10) to be served as an additional supporting member for said positioning blocks (7) (8).

A pair of supporting means (20) respectively adjacent to the fixing block (54) of the first sliding block (5) and the fixing block (64) of the second block (6) are secured to the table (1). A second main shaft (30) passing through said fixing block (54) (64) and said supporting means (20) is supported by said threaded holes (112) of the lugs (11) of the table. A third spring (301) connected to one end of a screw (303) is disposed on the second main shaft (30) and located between the fixing block (54) of the first sliding block (5) and the lug (11) of the table (1) while the other end of the screw (303) is threadedly engaged with the threaded hole (112) thereof so that the screw (303) can be removed along the direction of the second main shaft (30) to adjust the resumptive force of the third spring (301).

A fourth spring (302) associated with a screw (304) is disposed on the second main shaft (30) and located between the fixing block (64) of the second sliding block (6) and the lug (11) of the table (1). The screw (304) similar to said screw (303) is used to adjust the resumptive force of the fourth spring (302).

It is noted that the turns of the fourth spring (302) are more than those of the third spring (301) to provide a larger resumptive force therein.

A disk member (40) provided with a worm gear (401) is secured to the second main shaft (30) and located between said supporting means (20). the disk member (40) is further provided at the periphery with a plurality of holes (402) (only one is shown) to receive the pearls (not shown) which can be dropped from a container (403). The disk member (40) is so arranged that the lower edge thereof is received in the slot (12) of the table (1) while one of the holes (402) is positioned between the first and second positioning blocks (7) (8) and aligned with the needles (553) (653) thereof. The worm gear (401) is furnished with a plurality of predetermined grooves (404) corresponding to the needle member (661) of the fixing rod (66) of the second sliding block (6) such that when the second sliding block (6) is driven to reciprocate therein, the needle member (661) thereof can be driven to move along the grooves (404) thereby making the disk member (40) rotated therein to make the holes (402) of the disk member (40) passed through the drilling position, i.e. the position between the needles (553) and (653), in a step-by-step manner.

Referring to FIG. 1 a second motor (50) is provided with a pair of first and second pulleys (502) (503) at the both ends of the shaft (501) wherein the first pulley (502) is connected to the first pulley (551) of the first drilling shaft (55) by means of an endless belt (504) while the second pulley (503) is connected to the second pulley (651) of the second drilling shaft (65) by means of a endless belt (505). When the second motor (50) is actuated, the first and second drilling shaft (55) (65) thereof can be driven to rotate.

In use, firstly, a plurality of pearls (not shown) are respectively received in the holes (402) of the disk member (40) and one of the pearls is located between the needles (553) (653) thereof. Secondly, the second motor (50) is actuated to drive the needles (553) (653) of the first and second drilling shaft (55) and (65) to rotate. Thirdly, the first motor (44) is actuated to make the first and second sliding blocks (5) (6) alternately move toward and away from each other via the transmission mechanism (4) and the linking assembly (3).

When the sliding blocks (5) (6) are driven to move toward the disk member (40), the first and second positioning blocks (7) (8) in turn are driven to fixedly clamp the disk member (40) so as to fix one of the pearls in its specified drilling position. Finally, the pearl in the drilling position will be simultaneously drilled by the needles (553) (653) from both sides. It is noteworthy that when the positioning rod (56) of the first sliding block (5) is leant against the second sliding block (6), the needle (553) of the first sliding block (5) will be slightly pressed backward owing to the larger resumptive force of the second and fourth springs (92) (302) thereof meanwhile the needle (653) of the second sliding block (6) will continue to move forward to finish the drilling operation. This arrangement can prevent the needles (553) (653) thereof from contacting each other. As the first drilling operation is completed, the first and second sliding blocks (5) (6) will be driven to move away from the disk member (40) meanwhile the disk member (40) will be driven to rotate by means of the needle member (661) of the fixing rod (66) as described hereinbefore thereby enabling the next pearl to enter into the drilling position while making the drilled pearl dropped into the guiding groove (13) of the table (1). Accordingly, the same procedures can be repeated automatically.

Claims (2)

1. An improved drill for pearl or the like comprising a rectangular table provided at the opposite short sides with a pair of lugs and at the center with a slot and a guiding groove, a pair of first and second recesses symmetrically formed in the table and seperated by said slot and guiding groove, a supporting frame being secured to the underside of the table;; a linking assembly consisting of a pivotal rod, a pair of first and second linking rods and a pair of first and second linking members being disposed between the table and the supporting frame, the pivotal rod pivotally connected to the upperside of the supporting frame while each linking rod being pivotally connected at one end to each end of the pivotal rod, the other end of the first linking rod being pivotally connected to the first linking member having a pair of longer slots, the first linking member further provided with a fixing portion which protrudes beyond the first recess of the table, the other end of the second linking rod being secured to the second linking member which is provided at the lower end with a pulley member and at the upper end with a fixing portion which protrudes beyond the second recess of the table, a transmission mechanism comprising a pair of bearing seats each having a bearing received therein being disposed on the underside of the table adjacent to the second linking member, a shaft with a eccentric wheel secured thereto being located between and supported by the bearing seats such that the eccentric wheel is arranged to contact with the pulley member of the second linking member, said shaft being connected to a first motor such that when the shaft is driven to rotate, the eccentric wheel thereof will drive the pulley member of the second linking member to move back and forth thereby enabling the first and second linking members to move in a predetermined manner; a first main shaft being supported by the lugs of the table;; a first sliding block corresponding to the first recess of the table being slidably disposed on the first main shaft, the underside of the first sliding block being secured to the fixing portion of the first linking member such that when the first linking member is driven to move, the first sliding block in turn is shifted along the first recess of the table in a predetermined manner, said first sliding block provided with a pair of first and second supporting arms seperated by an opening and a first fixing block, a first drilling shaft with a first pulley disposed thereon being supporting by said arms and received in said opening, one end of the first drilling shaft projecting from the first supporting arm thereof being provided with a first drilling head having a needle secured thereto, a positioning rod parallel to the first drilling shaft being adjustably connected to the first supporting arm, a first spring being disposed on the first main shaft and located between the first sliding block and the lug of the table; a first positioning block adjacent to the first supporting arm of the first sliding block being slidably connected to the first main shaft, the first positioning block provided with a first guiding means through which the needle of the first drilling head can pass to guide the needle thereof to move in a predetermined direction;; a second sliding block corresponding to the second recess of the table being slidably disposed on the first main shaft, the underside of the second sliding block being secured to the fixing portion of the second linking member such that when the second linking member is driven to move, the second sliding block in turn is shifted along the second recess of the table in a predetermined manner, said second sliding block provided with a pair of first and second supporting arms seperated by an opening and a second fixing block, a second drilling shaft with a second pulley disposed thereon being supported by said arms and received in said opening, one end the second drilling shaft projecting from the first supporting arm thereof being provided with a second drilling head haveing a needle secured thereto, a second spring being disposed on the first main shaft and located between the second sliding block and the lug of the table; a second positioning block adjacent to the first supporting arm of the second sliding block being slidably connected to the first main shaft, the second positioning block provided with a second guiding means through which the needle of the second drilling head can pass to guide the needle thereof to move in a predetermined direction, the needle of the second drilling head being aligned with the needle of the first drilling head; a pair of supporting means secured to the table, a short shaft supported by said supporting means being passed through the first and second positioning blocks to be served as an additional supporting member;; a second main shaft passing through the first fixing block of the first sliding block and the second fixing block of the second sliding block being supported by the lugs of the table, a third spring disposed on the second main shaft and located between the first fixing block and the lug of the table while a fourth spring disposed on the second main shaft and located between the second fixing block and the lug of the table, a fixing rod provided with a needle member being secured to the second fixing block of the second sliding block;; a disk member provided with a worm gear being secured to the second main shaft and the lower end thereof being received in the slot of the table, the disk member further provided at the periphery with a plurality of holes to receive the pearls which can be dropped from a container, the worm gear furnished with a plurality of predetermined grooves which are associated with the needle of the fixing rod of the second fixing block of the second sliding block such that when the second sliding block is driven to move in a predetermined manner, the needle member thereof can be driven to move along said predetermined grooves to make the disk member rotated therein; ; a second motor provided with a pair of first and second pulleys at the both ends of the shaft, said first pulley being connected to the first pulley of the first drilling shaft by means of an endless belt while said second pulley being connected to the second pulley of the second drilling shaft by means of another endless belt such that when the second motor is actuated the first and second drilling shafts can be driven to rotate.

2. An improved drill for pearl or the like, substantially as hereinbefore described with reference to, and as illustrated in, the accompanying drawings.