1. Field of the Invention
The present invention relates to a steel strapping tool with a pressing strap structure.
2. Description of the Prior Art
Referring to
The conventional steel strapping tool uses the cutting unit 3 to press the steel strap for the steel strap to be bucked. However, the bottom of the cutting unit 3 and the base 1 are parallel, which is laborious to use the steel strapping tool.
After the packing procedure, the steel strap is secured to be one-piece by press of the compressing block of the cutting unit 3 and the compressed block of the base 1. The upper and lower sides have a shape corresponding to the compressing block and the compressed block, so the steel strap is stuck on the compressed block of the base 1. The user has to separate the steel strap from the compressed block of the base 1. However, it is difficult to separate the steel strap and the base 1 after the packing procedure, and the packing and fastening effect of the steel strap will be influenced. For example, the user holds the steel strapping tool and applies a force to separate the steel strap from the compressed block of the base 1. It is very inconvenient to separate the steel strap for next packing procedure.
Accordingly, the inventor of the present invention has devoted himself based on his many years of practical experiences to solve this problem how to separate the steel strap from the compressed block of the base.
A steel strapping tool with a pressing strap structure is provided. The steel strapping tool includes a base, a compressed block at one side of the base. The base has a pivot block extending from a front side thereof. A cutting unit is disposed on top of the base. The cutting unit includes a fixing seat which has an accommodating trough therein, a top engaging rod unit disposed in the accommodating trough, a cutting assembly having one end coupled to the top engaging rod unit and received in the accommodating trough. The base has a through hole which is transversely disposed beside the compressed block. The cutting assembly includes a cutting body and a connecting member which extends frontward from one side of the cutting body and passes through the fixing seat. The connecting member is pivotally connected with the pivot block of the base. Between the cutting body and the base defines an included angle. The cutting unit comprises a hook member located beside the cutting assembly. The hook member includes a link hole, a stop pin and a hook block disposed under the link hole. The link hole is adapted for insertion of one end of the stop pin. The other end of the stop pin is inserted in the cutting assembly to link the hook member and the cutting assembly. The hook block extends underneath the compressing blocks and is accommodated in the through hole of the base.
Thereby, the front end of the cutting body holds against a steel strap which is inserted in the steel strapping tool, and then the cutting body is to press the steel strap entirely so as to achieve a firm pressing effect. After the tool strapping tool fastens and cuts the steel strap, the hook block of the cutting body moves upward to assist in hooking the steel strap out, preventing the steel strap from getting stuck on the compressed block to enhance the steel strapping tool.
Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.
As shown in
The base 10 includes a recess 11 on top of one side of the base 10, a compressed block 12 disposed in the middle of the recess 11, a through hole 13 which is transversely disposed beside the compressed block 12, and a pivot block 14 extending from a front side of the base 10.
The cutting unit 20 is located on the base 10, and comprises a fixing seat 21, a top engaging rod set 22, a cutting assembly 23, and a hook member 24.
The fixing seat 21 includes a cover 211 and an elastic member 2111 at the front end of the fixing seat 21. The elastic member 2111 provides a closing force to the cover 211 and the fixing seat 21. When the cover 211 is not applied with an external force, the cover 211 is to cover the fixing seat 21, preventing bits from falling into the steel strapping tool 100. The fixing seat 21 comprises an axle connecting block 212 at a rear end of the fixing seat 21, an accommodating trough 213 which is lengthwise disposed in the middle of the fixing seat 21, a pair of connection holes 214 disposed at two sides of the fixing seat 21, a press block 215 disposed between the accommodating trough 213 and the axle connecting block 212, and a penetrating trough 216 at a front lower end of the fixing seat 21. The penetrating trough 216 is interconnected with the accommodating trough 213.
The top engaging rod unit 22 is pivotally connected to the pair of connection holes 214. The top engaging rod unit 22 includes a rod 221 and a linking plate 222. The rod 221 has a front end formed with a protruding engagement edge 2211 and an eccentric first pivot hole 2212. The top engaging rod unit 22 comprises a vertical engaging block 2213 which axially extends from one side of the first pivot hole 2212. The engaging block 2213 is gradually enlarged from one side to the other side thereof relative to the base 10. The linking plate 222 is located beside the first pivot hole 2212 and driven by the engaging block 2213. The linking plate 222 has an engaging hole 2221 at an upper portion thereof, a second pivot hole 2222 at a lower portion thereof, and a link protrusion 2223. The engaging hole 2221 is fitted on the engaging block 2213. The link protrusion 2223 extends from the upper section of the engaging hole 2221 of the linking plate 222 relative to the engaging block 2213. A shaft 223 is inserted through the pair of connection holes 214, the first pivot hole 2212 and the engaging hole 2221 so that the fixing seat 20, the linking plate 222 and the rod 221 are connected together.
The cutting assembly 23 is disposed in the accommodating trough 213 and under the top engaging rod unit 22. The cutting assembly 23 includes a cutting body 231 and a connecting member 232 which extends frontward from one side of the cutting body 231 and passes through the penetrating trough 216. The connecting member 232 has a free end provided with a pair of first pivot ears 2321 which extend downward from the free end. The pair of first pivot ears 2321 and the pivot block 14 are connected via a first pivot shaft 2322. The cutting body 231 includes a pair of second pivot ears 233 thereon, a roller 234 between the pair of second pivot ears 233, and a second pivot shaft 235 inserting through the pair of second pivot ears 233, the roller 234, and the second pivot hole 2222 of the linking plate 222, such that an included angle 2311 is defined between the cutting body 231 and the base 10. The protruding engagement edge 2211 leans against the roller 234. A cutter 236 is provided at a rear end of the cutting body 231. Two spaced compressing blocks 237 are provided under the cutting body 231. The two compressing blocks 237 correspond to the compressed block 12.
The hook member 24 is located beside the cutting assembly 23 and driven by the cutting assembly 23. The hook member 24 includes a link hole 241, a stop pin 242, and a hook block 243 disposed under the link hole 241. The link hole 241 is adapted for insertion of one end of the stop pin 242. Another end of the stop pin 242 is inserted in the cutting body 231. The hook block 243 extends underneath the compressing blocks 237 and is accommodated in the through hole 13.
The release unit 30 is coupled with the cutting unit 20. An accommodation space 31 is defined among the release unit 30, the cutting unit 20 and the base 10. The accommodation space 31 transversely defines an insertion end 311 and a stop end 312 opposite to the insertion end 311. The release unit 30 includes a release body 32. The release body 32 has a pair of connecting ears 33 at a front end thereof. The connecting ears 33 are pivotally connected with the axle connecting block 212 of the fixing seat 21, with the axle connecting block 212 as an axle center to swing back and forth. The release body 32 includes a handle 34 extending rearward from a rear end thereof, a pivot hole 35 at a central portion thereof, an opening 36 at one side thereof corresponding to the accommodation space 31, a press roller 37 disposed in the opening 36, and a pull guiding plate 38 disposed beside the press roller 37. The press roller 37 has a concave edge 371 on an inner wall thereof. The pull guiding plate 38 is coupled with the press block 215. When the handle 34 of the release body 32 is lifted up, the pull guiding plate 38 will be linked to pull the press block 215 to move.
The reel unit 40 is pivotally connected to the release body 32. The reel unit 40 includes a reel rod 41 and a pivot rod 42. The reel rod 41 has a through hole 411 at a front end thereof and a one-way bearing 412 received in the through hole 411. The pivot rod 42 is inserted through the one-way bearing 412 and pivotally connected to the pivot hole 35 of the release body 32. The pivot rod 42 is provided with an axial pivot axle 421 which corresponds to the press roller 37. The pivot axle 421 is provided with a protruding block 422 corresponding to the concave edge 371 of the press roller 37.
Referring to
When the steel strapping tool 100 is not in use, the cover 211 is to cover the fixing seat 21 for the user to hold the steel strapping tool 100 by hand, preventing the user's finger from inserting into the steel strapping tool 100 as well as avoiding the bits from falling into the steel strapping tool 100 to influence the packing efficiency. When the cover 211 is opened or closed relative to the pull operation of the top engaging rod unit 225, the cover 211 won't influence the packing procedure. When the operator uses the hook member 24 to assist in hooking the steel strap 200 out, he/she can press the cover 211. This provides the operator an energy-saving and exact way to hook the steel strap 200 out, not influencing the steel strap 200 which has been pressed and engaged.
Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims.
The current application is a continuation-in-part of, and claims a priority to the U.S. Ser. No. 12/619,975 filed on Nov. 17, 2009.
Number | Date | Country | |
---|---|---|---|
Parent | 12619975 | Nov 2009 | US |
Child | 13546928 | US |