1. Field of the Invention
This invention relates to a dust collect machine, particularly to one provided with a dust-bag previously pressing hook for previously pressing a dust bag against around an annular wall of a wind exhausting tank so as to subsequently secure stably the dust bag with the wind exhausting tank.
2. Description of the Prior Art
Medium and large dust collect machines generally have a wind exhausting tank, and one or more annular rings for a mouth of a dust bag to be fitted and secured stably around with an annular constrictor. However, the duct bag is sub substantially heavy, so in fitting and securing its mouth around the annular member may be quite hard to perform by only one person if it is not previously held. Dust bag positioning device for a dust collecting machine as shown in
However, the hooking portion 13 of the positioning member 10 has a proper elasticity by means of the L-shaped portion 12 and pushed against the wall surface of the annular member, but its elasticity is not so good, liable to produce fatigue and becoming impossible to effectively and previously hook a dust bag so that the dust bag cannot be kept stably in its position during subsequent dust collecting work. Besides, the positioning member is made of a metal plate by bending process to make its lower end formed as the hook portion with a pointed cone shape for hooking. But this shape is not convenient for producing. In addition, the connecting portion 11 is tightly connected with the annular member, impossible to be adjusted in its position for receiving balanced force, if the positioning members 10 are not positioned all right. Then a dust bag may be inclined, needing repositioning, resulting in unnecessary waste of work.
A dust-bag previously pressing hook for a dust collecting machine is made of an elongate metal wire, wound to form a combining portion in an upper portion, a coil portion in an intermediate portion and a straight portion in a lower portion. The combining portion is adjustably secured on an annular ring of a wind exhaust tank, and the straight portion has an end hook to press against the annular ring by means of the torque gotten from the coil portion. So a dust bag is moved up around the annular rind to let its mouth reach the end hook and to be pressed previously stably against the annular ring before the dust bag is secured tightly with the annular ring and kept at that secured position without falling down during subsequent dust collecting work.
This invention will be better understood by referring to the accompanying drawings, wherein:
A preferred embodiment of a dust-bag previously pressing hook for a dust collecting machine in the present invention, as shown in
When a dust bag 40 has its mouth 41 fitted and secured around the outer surface 32 of the annular ring 30, the annular constrictor 50 is used to constrict the annular groove 321 and the dust bag 40 stably and tightly. And the dust bag 40 is to be pressed previously by the dust-bag pressing hook 60 before the annular constrictor 50 constricts the dust bag 40 at its position.
Each annular ring 30 has the outer surface 32, an annular groove 321 near a wind exhaust hole 31, an annular shallow groove 322, and plural threaded holes 323 in the outer surface 32 near the annular shallow groove 322.
The dust-bag previously pressing hook 60 is made of an elongate metal wire wound to form a combining portion 61 with its two U-shaped ends 611 fixed tightly or loosened on the screw holes 613 of the outer surface 32 with a washer 612, an intermediate coil portion 62 continuing from the combining portion 61, and a lower straight portion 63 with an end hook 64 continuing from the intermediate coil portion 62. Then the end hook 64 can elastically press against the annular shallow groove 322 by means of the torque of the coil portion 62.
In using, referring to
On the contrary, if the dust bag 40 fixed on the annular ring 30 is to be taken off, a worker pulls the end hook 60 off the dust bag 40 and the annular shallow groove 322 of the annular wall 32, with the straight portion 63 pulled back to permit the end hook 64 separating from the dust bag 40 and also the annular shallow groove 322, and then the annular constrictor is removed off to let the dust bag 40 free to be pulled off the annular wall 32.
As can be understood from the foresaid description, the invention has the following advantages.
While the preferred embodiment of the invention has been described above, it will be recognized and understood that various modifications may be made therein and the appended claims are intended to cover all such modifications that may fall within the spirit and scope of the invention.