Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25G—HANDLES FOR HAND IMPLEMENTS
  • B25G3/00—Attaching handles to the implements
  • B25G3/34—Attaching handles to the implements by pressing the handle on the implements; using cement or molten metal, e.g. casting, moulding, by welding or the like
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25G—HANDLES FOR HAND IMPLEMENTS
  • B25G3/00—Attaching handles to the implements
  • B25G3/02—Socket, tang, or like fixings
  • B25G3/12—Locking and securing devices
  • B25G3/26—Locking and securing devices comprising nails, screws, bolts, or pins traversing or entering the socket

Definitions

• the invention relates to a fastening of a plastic sleeve, which has a longitudinal opening for receiving a coupling nipples or the like and a transverse threaded hole to hold a screw on a wooden handle.
• the invention has for its object a Stielbefesti to create, which is easier to manufacture, at the connection properties are improved, the number of the parts and thus the manufacturing and storage costs are reduced and compared to water ingress is better sealed.
• the invention provides that the plastic sleeve is formed integrally with it has the portion that extends around an axial end region arranged around the wooden handle and connected directly to it that is.
• the plastic can be one Act thermoplastic, but they are also reactive resins possible who glued or foamed around the end area that can. It has been found that the connection the plastic with the wood is extraordinarily good because the wood has a relatively rough, fiber-rich surface, so that there is a good connection with the plastic is coming. It is particularly favorable if the plastic is around the end of the wooden handle is sprayed.
• the end region of the stem has a reduced diameter.
• the extrusion-coated plastic runs flush with the rest of the stem, so that none Edges are present in which there is dirt or moisture can fix.
• the reduced diameter of the stem can be achieved by simple milling, which is the same has the advantage that the surface is relatively rough is. This in turn leads to improved liability between plastic and wood.
• the invention provides that the length of the end region the stem or the overmolded section of the plastic sleeve at least about twice as long, preferably three times as long as the diameter of the stem. This leads to to a mechanically good connection, because the upper liability area is sufficiently large.
• the plastic sleeve in a End area of the stem surrounding and over the stem end protruding tube and in the space between the Pipe and the stem is introduced, preferably injected is.
• the tube can advantageously be made of metal, in particular aluminum, but it can also consist of a differently composed plastic. The pipe ver increases the bending moments to be transmitted and keeps the art fabric sleeve firmly clamped.
• the outer diameter of the tube at least in the Be overriding the stem range is approximately equal to the outer diameter of the stem in the corresponds to the remaining area. This will make it smoother Transition between the outside of the tube and the itself adjoining area of the stem created so that no dirt can collect.
• the stem in has at least one annular groove in its end region.
• this ring groove filled by the plastic is an increase in tensile strength is achieved.
• Two such ring grooves are expediently provided.
• the tube is in a smaller area protruding from the stem Has diameter.
• the longitudinal opening is for receiving a coupling nipple arranged.
• the downsizing of the Drill diameter can by the known method of the one drawing a tube, for example an aluminum tube getting produced.
• the reduced diameter makes it i.a. possible, the pipe in this area only as thick need to form as it is for inserting the clutch nipples is required, whereby wooden handles differ thickness can be used.
• the direction of the fastening axis strikes the invention that the pipe in its cross-handle Area is ribbed inside. While the plastic on the fibrous surface of the wood adheres sufficiently firmly, becomes special due to the internal ribbing of the tube good adhesion of the pipe to the plastic in the direction of rotation reached. The ribbing also separates the part area between tube and plastic enlarged.
• a special The favorable type of ribbing is given if the pipe in this area from the outside molded longitudinal groove ten has the corresponding ribbing on the pipe form inside. So there are grooves in the outside molded into the tube, which can be seen on the inside to press. The material thickness of the pipe remains the same everywhere, so that the corresponding webs are formed without that the material is weakened. The installation of the grooves from the outside, of course, has manufacturing advantages.
• the invention further provides that the tube in the area enlarge the opening of the threaded hole in the plastic sleeve ßert diameter, being on the plastic sleeve a projection formed through the opening to the outside is.
• This allows, for example, the length of the win the in which the locking screw is arranged, enlarge eat. This leads to better guidance of the screw and a longer lifespan.
• this leads this, of course, again to secure the connection between plastic and pipe.
• the mold an appropriate shape at this point exhibit.
• the approach can be used to advantage a device that interacts with the screw to have, with the help of the screw captive ge is held.
• the approach can be an over have snap-fit and possibly radial slots, which enables the snap collar to be deformed more easily lichen.
• Such a protection against loss is from DE-GBM 7916056 known.
• the invention also proposes a method of manufacture development of a handle attachment in which a plastic sleeve is connected to a wooden handle.
• This stem Fastening can be designed as be above was written.
• the plastic can provided that it is, for example, a thermoplastic acts, injected, but it can also on son be introduced and cured, or also be foamed.
• the axial end area of the stem can be changed as required be selected, it makes sense that its length at least about two to three times the diameter of the stem sers matters.
• the handle of the wood can be used on the tool Wooden handle to be pressed, the pressing up to Inner diameter of the tube can be done. In this way is achieved that the plastic from the corresponding End of the tube does not emerge and therefore from the outside un is visible.
• the mold can be designed so that it is not protrudes inward beyond the outer diameter of the tube.
• a molding tool use at least one cavity in the federal area det.
• the cavity can have a narrow opening be connected to the waistband area so that after finishing Stem attachment in the area of the federal sphere or the like are trained who with the narrow webs Confederation are connected. These narrow bars can be opened immediately break off so that the spherical projections are removed that can.
• This training has the advantage that one It can be checked at a glance whether the spraying process is faulty has expired freely.
• the invention further provides that when manufacturing the Plastic sleeve through a side opening of the tube setting thread approach is formed, in particular from shaped.
• the plastic sleeve is positio kidney inserted into the tool so that its opening in Match the shape on the outside of the tube reached.
• the invention further provides the tube before its on place in the mold in its protruding over the stem to rejuvenate the area. This can be done through the known Pipe pulling happen. Furthermore, can be provided be that the tube before inserting it into the mold is grooved. These grooves on the outside form similarly shaped grooves on the inside of the Rohres, which, if they run in the longitudinal direction, a particularly inexpensive rotation lock between the pipe and the brought in plastic.
• a ring can be provided to produce the grooves with embedded balls over the pipe and that To move pipe along.
• Spheres with an inscribed circle are then removed from each sphere a more or less deep groove that formed both in the pure longitudinal direction as well as when rotating the ring be designed to run obliquely during the movement can.
• This way of producing the grooves has the advantage that if a ball wears out, it can easily be replaced can.
• Fig. 1 shows a longitudinal section through a handle attachment according to the invention
• Fig. 2 is a plan view of the arrangement in Fig. 1;
• Fig. 3 is a view of the arrangement from the left in Fig. 1;
• Fig. 4 is a section along line IV-IV in Fig. 1;
• Fig. 5 is a section along line V-V in Fig. 1;
• Fig. 6 shows schematically the arrangement in the manufacture a handle attachment
• Fig. 7 is a schematic corresponding to Fig. 6 View of another type of manufacture
• Fig. 8 shows another change in production.
• Fig. 1 shows in longitudinal section an attachment between a wooden handle 11, a plastic sleeve 12 and a End region 13 and the plastic sleeve 12 overlapping Tube 14, which in the present example consists of aluminum.
• the length of the end region 13 of the wooden handle 11 is approximately three times as long as the diameter of the wooden handle 11.
• the end region 13 itself has a reduced through knife, the free end 15 of the end portion 13 slightly runs frusto-conical.
• a second of the Like groove 17 is arranged closer to the end of the tube 14 net. It also has an approximately trapezoidal cross section.
• the plastic sleeve 12 is in the interior of the tube 14 injected, being a first section in Fig. 1 left 18, in which it contains a longitudinal opening 19.
• the Longitudinal opening 19 has at the end 20 of the plastic sleeve 12 towards a circular cross section while continuing Inside individual longitudinal webs 21 extend ken.
• the longitudinal webs form contact surfaces for one in the Longitudinal opening 19 coupling nipple to be used.
• a circumferential collar 24 which has a smooth transition forms between the tube 14 and the wooden handle 11.
• Collar 25 formed from the material of the plastic sleeve 12, which closes the handle attachment to its free end.
• tube 14 includes an opening 26, through which a shoulder 27 of the plastic sleeve 12 occurs.
• the approach 27 contains a longitudinal bore 28 which is transverse extends to the longitudinal opening 19 of the plastic sleeve 12.
• a thread 29 In their area closest to the longitudinal axis of the tube 14 contains the longitudinal bore 28 a thread 29.
• a snap collar 30 On its outside page contains the approach 27 a snap collar 30, the somewhat outward compared to the otherwise cylindrical shape protrudes the outside of the approach 27.
• the approach 27 contains a total of four slots 31, whose side walls 32 run approximately radially, see also FIG. 2.
• the pipe contains, see 2, a plurality of grooves 33 running in the longitudinal direction, the boundary surfaces seen in cross section on one Circular arcs lie.
• the grooves 33 are by bending the Tube 14 made so that they are also on the inside of the tube 14 in the end region 13 of the stem 11 are.
• Fig. 3 shows the view of the handle attachment from the left 1 and 3.
• the tube 14 is not closed from the left see, since the front is formed by the collar 25.
• the webs 21 already mentioned in FIG. 1 reproduce internally directed contact surfaces 34, on which adjacent Can create surfaces of a hexagon.
• the longitudinal opening 19 is traversed at its end by a cross piece 35, the insertion of a hexagonal coupling nipple limited. He is then approached by one through 27 and the thread 29 screwed screw applied transversely and pressed against the contact surfaces 34 of the longitudinal webs 21. This leads to a clutch with no play nipples on the stem 11.
• Fig. 4 shows the section along line IV-IV in Fig. 1, the section extending across the neck 27.
• the extension 27 protrudes on the inside of the longitudinal bore 19 something into this while he is on the outside of the Tube 14 clearly protrudes from this.
• the thread 29 is only formed in the lower region of the extension 27.
• Fig. 5 shows a section through the tube 14 in the end region 13 of the wooden handle.
• the outside of the tube contains a total of eight grooves evenly distributed over the circumference 33, which are delimited in cross section by a circular line.
• the grooves 33 correspond to the inside of the tube 14 corresponding part-circular ribs 37, which except for the Range outside of the end portion 13 of the wooden handle 11.
• There are a total of eight between the ribs 37 trapezoidal in the longitudinal direction of the wooden handle 11 creating spaces into which the plastic can penetrate and up to transition area 23 for the formation of the federal government 24 can reach.
• the tube 14 is therefore completely against rotation Help of the plastic on the end portion 13 of the wooden handle 11 attached.
• the grooves 33 on the outside with Hil fe generated by balls moving in the longitudinal direction, bil the recessed grips on the outside, which you can touch and start handling the stem from the outside increase.
• FIG. 6 shows the arrangement of the end area in a highly schematic manner ches 13 of the stem 11 is only partially shown th molding tool 38.
• the tube 14 already has the finished Shape, i.e. with grooves 33 on the outside. Between the mold and the outside of the tube 14 is a small distance 39 is present, which when injecting the Plastic under pressure deforms the aluminum tube res 14 to the outside.
• the mold 38 includes one Stage 40, which is immediately at the free end 41 of the tube 14 is present.
• the depth of step 40 corresponds to the thickness of pipe 14.
• Behind stage 40 contains the molding tool a slightly curved portion 42 that extends outward. So during the injection of the plastic Wooden handle 11 pressed down in this area, so that the plastic in the cavity 43 between the outside the wooden handle 11 and the inside of the tube 14 penetrate gen can, but not over the free end 41 of the tube 14 can step out.
• the tool 45 contains one approximately spherical cavity 46 in which the art fabric from the cavity 43 and the collar 24 formed a narrow opening 47 can enter. After curing and removing the tool 45 is on the collar 24 in the area of the cavity 46 formed a ball, which with the help of a narrow web 47 is connected to the collar 24. If the Ball at least in the area of the small opening 47 , it means that the plastic is actually full has constantly penetrated into the cavity 43. Due to the The balls can then be broken off using small bars.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Food-Manufacturing Devices (AREA)
• Steering Devices For Bicycles And Motorcycles (AREA)
• Mutual Connection Of Rods And Tubes (AREA)

Applications Claiming Priority (2)

Publications (2)

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ID=6244594

Family Applications (1)

Country Status (2)

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Citations (9)

Family Cites Families (7)

• 1984
  • 1984-09-04 DE DE19843432461 patent/DE3432461A1/de active Granted
• 1985
  • 1985-08-22 EP EP85110555A patent/EP0174532A3/de not_active Withdrawn

Patent Citations (9)

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