EP0408621A1 - Dispositif de serrage de courroie - Google Patents

Dispositif de serrage de courroie

Info

Publication number
EP0408621A1
EP0408621A1 EP19890903824 EP89903824A EP0408621A1 EP 0408621 A1 EP0408621 A1 EP 0408621A1 EP 19890903824 EP19890903824 EP 19890903824 EP 89903824 A EP89903824 A EP 89903824A EP 0408621 A1 EP0408621 A1 EP 0408621A1
Authority
EP
European Patent Office
Prior art keywords
strap
core
cog
winding
tightening device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19890903824
Other languages
German (de)
English (en)
Inventor
Lennart Lindblad
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Linvent AB
Original Assignee
Linvent AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Linvent AB filed Critical Linvent AB
Publication of EP0408621A1 publication Critical patent/EP0408621A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P7/00—Securing or covering of load on vehicles
    • B60P7/06—Securing of load
    • B60P7/08—Securing to the vehicle floor or sides
    • B60P7/0823—Straps; Tighteners
    • B60P7/083—Tensioning by repetetive movement of an actuating member
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B11/00—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts
    • A44B11/02—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts frictionally engaging surface of straps
    • A44B11/06—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts frictionally engaging surface of straps with clamping devices
    • A44B11/12—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts frictionally engaging surface of straps with clamping devices turnable clamp
    • A44B11/125—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts frictionally engaging surface of straps with clamping devices turnable clamp with strap tightening means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B25/00—Implements for fastening, connecting or tensioning of wire or strip

Definitions

  • the subject invention concerns a strap tightening device comprising a frame which consists of two mutually spaced apart lateral walls, a strap winding-on core bridging the space between said lateral walls and being rotatably mounted in said walls, and a pivotable lever which is drivingly connected to the strap winding-on core via a one-way coupling and which is pivotable relatively to the frame in a plane extending crosswise to the centre axis of said strap winding-on core.
  • Prior-art tightening devices of this kind usually have a drive coupling means which is mounted between the pivotable lever and the strap winding-on core and which comprises at least one cog-wheel which is supported on the strap winding-on core and also one or several spring-biased pawls which cooperate with the teeth of the cog-wheel for engagement therewith. These pawls are arranged to bring along the cog-wheel and thus the strap winding-on core upon movement of the pivotable lever in one direction but to ride above the cog-wheel upon pivotable movement of the lever in the opposite direction.
  • Strap tightening devices of this kind are often very difficult to use, particulary when they are placed in positions where they are not easily accessible, and this is mainly due to the fact that when the strap is being tightened it becomes necessary to move the pivotable lever in a direction away from the frame, with the result that the tightening device becomes unsteady, because the frame is not backed up by any support, such as e.g. the load to be secured by the strap or any other suitable fixed support face on the load carrier.
  • the main purpose of the subject invention is to provide an easily mana gable strap tightening device which has none of the disadvantages outlined in the aforegoing.
  • the strap tightening device is characterized therein that the one-way coupling comprises at least one pair of cog-wheels, of which one of the cog-wheels is connected to the strap winding-on core whereas the other cog-wheel is connected to the pivotable lever, the centres of the two intermeshing cog-wheels coinciding with respectively the centre of rotation of the strap winding-on core and the centre of rotation of the pivotable lever, and in that the one-way coupling is releasable and arranged in such a manner that the winding-on core is turned in the strap winding-on direction when the pivotable lever is pivoted in the direction towards the frame.
  • FIG. 1 is a lateral view of a strap tightening device in accordance with a first embodiment
  • Fig. 2 is a view from above of the tightening device of Fig.
  • Fig. 3 is a cross section along line III-III of Fig. 2
  • Fig.4 is a cross section corresponding to Fig.3 but showing the pivotable lever in a winding-on core release position
  • Fig.5 is a lateral view of a strap tightening device in accordance with an alternative embodiment
  • Fig.6 is a longitudinal sectional view through the device of Fig.5 but shown in an operative, strap tightening position
  • Fig. 7 is a view from above of the strap tightening device in accordance with Fig. 5, and
  • Fig 8 is a partly broken lateral view of the same device seen along line VTI-VII of Fig.7.
  • the strap tightening device illustrated in Figs. 1 - 4 comprises the following principal components, viz. a frame generally indicated by reference numeral 1, a strap winding-on core 2 which is rotationally mounted in the frame 1, and a pivotably mounted lever 3 which by means of a releasable one-way coupling is arranged, when rotated, to bring along the strap winding-on core 2 in its rotational movement to wind-on and tighten the strap 4 intended to be tightened by means of the tightening device.
  • the strap 4 could either extend about the article to be fastened in the form of a continuous loop the two ends 4a', 4a" of which are anchored to the tightening device, as is illustrated in Fig. 1, or else the two strap ends 4a', 4a 1 ' could be secured independently, for instance to the surface supporting the load to be fastened or in any other suitable manner.
  • the frame 1 comprises three parallel, spaced apart plates 5, 6 and 7, of which plate 6 and plate 7 preferable are lateral flanges which have been bent upwards from an element of U-shaped cross- -sectional configuration which is bent from a sheet metal blank.
  • the lateral flanges are kept the desired distance apart by means of preferably rivet-pin spacer means 8, 9 and 10, of which spacer means 9 and 10 also bridge the distance between the parallel plates 5 and 6, whereby these parallel plates 5 and 6 will form the side walls of the part of the tightening device which is intended to accommodate the strap 4.
  • the end portions 2b and 2c of the strap winding-on core 2 extend through the end part of the parallel plates 5 - 7, said end portions 2b and 2c merging between the parallel plates 5 and 6 into an enlarged portion 2a, the transitional part between the enlarged port on and the end portions forming an axial abutment face against the facing sides of the parallel plates 5 and 6.
  • the parallel plate 5 which also forms one of the side walls of the buckle, is pivotably mounted on the spacer pin 9.
  • the end plate 5 is biased against an axial abutment face on the spacer pin 9 by means of a spring washer 11 which on account of its flexibility in combination with the inherent springiness of the plate 5 allows the end wall to be turned away from the winding-on core 2 and be pivoted clockwise in accordance with Fig. 1.
  • the free end part of the spacer pin 10 serves as a limit abutment means, preventing the end plate 5 from pivoting in this direction beyond the position illustrated in Fig. 1.
  • the strap winding-on core 2 is formed with an axially extending slit 12 which opens into the openable end of the tightening device, which means that the strap 4 may be inserted axially into the winding-on core, when the side wall 5 is pivoted out of the way.
  • a stud 13 is formed on the end wall 5, the outer diameter of which is equal to or somewhat smaller than the width of the slit 12.
  • the stud 13 is supported by a tongue member 14 which is punched from the end wall 5 and which projects over the end portion of the strap winding-on core.
  • the pivotable lever 3 is located in the gap formed between the end plates 6 and 7 and it is journalled in said plates on a shaft 15 which also supports a cog-wheel 16 for rotation therewith. This cog-wheel constantly engages a cog-wheel 17 which is rotatably mounted on the strap winding-on core 2.
  • the pivotable lever 3 is formed with a locking pawl 18 in the form of a rocker plate forming a double lever having its pivot point at 19 and one arm 18a of which is biased by means of a tension spring 20 one end of which is attached to the arm 18a of the rocker plate whereas the opposite end is attached to a pin 21 bridging the gap between the two plate-like spaced-apart side pieces 22 of the pivotable lever 3.
  • the opposite arm 18b of the rocker plate thus tends to engage the cog-wheel 16 as a result of the spring force of spring 20, thereby preventing this cog-wheel from rotating in a clockwise direction as seen in Fig. 3 relatively to the pivotable arm whereas the cog-wheel is allowed to rotate in the opposite direction relatively to the pivotable lever.
  • Portion 18b of the rocker plate 18 projects through essentially triangularly shaped openings 23 formed in the side walls 22 of the pivotable lever. One apex of the triangularly shaped apertures form the rocker plate pivot point 19.
  • rocker plates 24, 25, and 26 are mounted in a corresponding manner in correspondingly triangularly shaped apertures 27, 28 and 29 and one of their end portions is biased by means of associated tension springs 30, 31 and 32, respectively.
  • These springs are attached to the frame by means of cross pins 33, 34 and 35, respecti ely, in such a manner that the rocker plates tend to assume the position illustrated in Fig. 3 wherein they are in engagement with the cog-wheel 17 so as to prevent the latter from rotating counter-clockwise relatively to the frame as seen in Figs. 3 and 4 but to allow it to rotate in the opposite direction.
  • a release ring 36 is rotatably mounted on the strap winding-on core, said ring having radially projecting abutment fingers 37, 38 and 39, respectively, which are arranged to cooperate with the rocker plates 24-26, and also a radially projecting dog finger 40.
  • this finger 40 cooperates with and abuts against a cam portion 41 formed on the pivotable lever.
  • the pivotable lever may be blocked in the position illustrated in Fig. 3 by means of a locking member 42 which is arranged for axial displacement in the arm which by means of a spring 43 normally is maintained in the left position as seen in Fig. 3.
  • the locking member 42 abuts against a limit stop member 44, thus maintaining a catch 45 in engagement with a hook-shaped notch 46 in each one of the two end pieces 6 and 7.
  • An end portion 42a of the locking member 42 extends to the left as seen in Fig. 3, somewhat beyond the rest of the lever.
  • the locking member 42 could be moved against the action of the spring 43 to a second position, in abutment against a limit stop means 47 and in this second position the catch 45 is disengaged from the hook-notch 46, thus allowing the pivotable lever to pivot upwards in relation to the frame 1.
  • the abutment or release ring 36 preferably is spring-biased by spring 48 in the counter-clockwise direction to the position in which the locking rocker plates or pawls 24 - 26 are allowed to pivot into engagement with the cog-wheel 17.
  • the strap tightening device described in the aforegoing operates in the following manner.
  • One part 4a' of the strp or a separate strap may preferably be secured to the tightening device beforehand or be wound in loops about the spacer pins 9 and 10, as illustrated in Fig. 1, making the strap self-braking.
  • the end piece 5 is pulled away from the end portion 2b of the strap winding-on core against the action of the spring washer 11 and/or the inherent springiness of the very material of the end piece, and it is then turned away in the clockwise direction as seen in Fig. 1.
  • the strap accommodation slit 12 in the strap winding-on core is now freely accessible from the side of the device.
  • the strap part 4a" may therefore be introduced into the slit formed in the strap winding-on core without the end part of the strap necessarily being accessible. As a result, the strap need not be threaded through the slit.
  • the end piece 5 is returned to the position illustrated in Fig. 1.
  • the strap is now ready to be tightened.
  • thi s means that owing to the abutment of the rel ease fingers 37 - 39 against the associated one of locki ng pawl s 24 - 26 the latter are disengaged from the cog-wheel 17 and thus the latter, together with the strap winding-on core 2 , may rotate cl ockwi se as seen in Figs . 3 and 4.
  • This i s made possible because in thi s position of the pivotable lever the pawl 18 sl ides up a cam face 50 formed on the end wal l s 6, 7 of the frame .
  • the strap When the strap wound onto the strap winding-on core 2 has been wound off the latter the strap may be removed from the device, ei ther by being pull ed through the sl i t 12 in the l engthwise direction of the strap or el se the strap may be removed in the lateral di rection after removal of the si de wal l 5 away from the strap winding-on core in the manner described in the aforegoing.
  • the release rings 36 are returned by means of the spring 48 to the inactive position illustrated in Fig. 3.
  • the spring may be eliminated, i.e. when the angle is such that no self-braking occurs in any position.
  • the gear ratio afforded by the cog-wheel combination 16, 17 means both that a comparatively large force is obtainable to effect the pivotable movement upwards of the lever, although the lever is comparatively short, and also that the tightening of the strap may be effected by the movements of the pivotal lever in the direction towards the tightened strap and against the frame part of the tightening device. In most situations this provides for easy and convenient operation of the device, which often is placed in positions that make it difficult to reach.
  • the tightening device illustrated in Figs. 5 - 8 comprises a frame which is identified generally by numeral 101, a strap winding-on core 102 and a pivotal lever 103.
  • the frame 101 is made from two, mutually spaced apart side plates 105 and 106, respectively.
  • the side plates are interconnected by a cross bar 107 having a U-shaped cross-sectional configuration and having end flanges 107a which extend through openings formed in the side plates 105, 106 and secured in position in said openings by up-ending of the material.
  • the strap winding-on core 102 consists of two rods 102a and 102b which have a cross-sectional shape in the form of segments of a circle and which are formed with flat faces 102a 1 and 102b', respectively, arranged in facing relationship.
  • the two strap winding-on core sections pass through apertures of corresponding configuration which have been made in two cog-wheels 108 and 109, respectively.
  • the two cog-wheels retain the two sections in a spaced apart relationship, whereby a slit 110 is formed which extends all the way along the strap winding-on core. Through this slit, the strap 104 to be wound onto the core is intended to be inserted.
  • the locking pins 111, 112 preferably are tubular members which are radially expandable and formed with lengthwise extending slits.
  • the pivotable lever 103 is pivotably mounted in the frame 101 on a shaft 113 and consists of plate-like side pieces 114 and 115, one on either si e of the side pieces of the very frame, and spaced a sufficient distance apart to allow also the associated cog-wheels 116 and 117 to be accommodated therein, these cog-wheels being mounted on the shaft 113 for rotational movement relatively to the frame 101 as well as to the pivotable lever 103.
  • a rocker pawl 118 extends between and is mounted in the two side pieces 105, 106 of the pivotal lever and form a double lever with its fulcrum in point 119.
  • One of the arms of the lever is biased by a traction spring 120 tending to maintain the opposite arm in engagement with the cog-wheels 116, 117.
  • the pawl 118 is directed in such a manner relatively to the cog-wheels 116, 117 that the pivotal arm 103 carries along the cog-wheels in its movement counter-clockwise as seen in Fig. 8, for example, whereas the pawl rides above the cog-wheel theeth when the pivotal lever 103 is turned clockwise in accordance with the same drawing figure.
  • Reference numeral 121 designates a locking element which extends between the side pieces 105, 106 of the frame and which is pivotally mounted therein, said locking element being maintained in engagement with the cog-wheels 108, 109 that are mounted on the strap winding-on core.
  • the locking element 121 penetrates through the side pieces of the frame sufficiently far to cross the planes in which the pivotal lever side pieces 114, 115 are positioned.
  • the side pieces of the pivotal lever which are interconnected at the free end of the pivotal lever by means of a spacer member in the form of a sleeve 123 and pin 124 passing therethrough, present adjacent the pivotally mounted end of the lever a release finger 125.
  • a locking means 126 In the side pieces of the pivotal lever is displaceably mounted a locking means 126 to which the opposite ends of the traction springs 120 are attached, thus tending to maintain the locking means 126 in the displaced locking position illustrated in Fig. 8, in which the latter engages a notch 127 formed in the frame side pieces.
  • a dog finger 131 extends between the locking means 126 and a depending finger 118a on the pawl 118, said finger 131 providing unrestricted movement space for the pawl during normal use but upon actuation by the locking means 126 in the release direction, i.e. to the left as seen in Fig. 8, causes the pawl 118 to be disengaged from the cog-wheels 117.
  • Fig. 6 illustrates the manner in which a strap part 104a' is permanently fastened to a cross bolt 130 which extends between the frame side pieces.
  • the locking means 126 When the strap is to be released, the locking means 126 is moved to the left as seen in Fig. 8 and is then disengaged from the blocking notch 127 while at the same time the pawl 118 via the dog finger 131 is disengaged from the cog-wheels 117.
  • the pivotal lever 103 is then pivoted clockwise until its release finger 125 contacts that face of the locking element 121 that faces the cog-wheels 108, 109, lifting this element out of its engagement with the cog-wheels, whereupon the strap winding-on core together with its cog-wheels and thus also cog-wheels 116, 117 on the pivotal lever are allowed to turn freely.
  • Reference numeral 132 designates a cam means formed on the side pieces of the frame which in the release position shown in Fig. 5 cooperates with and abuts against the pawl 118, lifting the latter out of its engagement with cog-wheels 116, 117 with the result that the latter cannot be braked but are allowed to turn freely, whereby the strap may be wound off the strap winding-on core without any significant resistance.
  • the invention is not limited to the embodiments described in the aforegoing and illustrated in the accompanying drawings as examples only but its various detail components may be altered in a variety of ways within the scope of the appended claims without departing from the inventive idea.
  • the tigthening device may be made from another material than the sheet metal material to which reference is made in the aforegoing and as shown in the drawings.
  • the tightening device or component parts thereof could be castings which means that the parts involved are given a different configuration.
  • other types of modifications are possible within the scope of the invention without departing from the inventive idea thereof.
  • the dimensions of the two cog-wheels making up the cog-wheel pairs may be varied in many ways to achieve a suitable gear ratio in relation to the length of the pivotal lever.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Package Frames And Binding Bands (AREA)

Abstract

La présente invention se rapporte à un dispositif de serrage de courroie du type comprenant un noyau de serrage de courroie qui est monté pivotant dans une structure et qui, au moyen d'un couplage unidirectionnel, est mis en rotation pas à pas par un levier pivotant. Afin de permettre une manipulation et un fonctionnement aisés du dispositif de serrage tout en assurant des directions de forces favorables, le couplage unidirectionnel de la présente invention comporte également au moins une paire de roues dentées (16, 17), la roue dentée (17) étant reliée au noyau d'enroulement de courroie (2) et l'autre roue dentée (16) étant reliée au levier pivotant. Les centres desdites roues dentées qui s'engrènent l'une dans l'autre coïncident avec les centres de rotation respectivement du noyau d'enroulement de courroie et du levier pivotant, le couplage unidirectionnel étant détachable et destiné à forcer le noyau d'enroulement de courroie à tourner dans la direction d'enroulement de la courroie, lorsqu'on fait pivoter le levier pivotant en direction de la structure.
EP19890903824 1988-03-18 1989-03-17 Dispositif de serrage de courroie Withdrawn EP0408621A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8800996 1988-03-18
SE8800996A SE8800996L (sv) 1988-03-18 1988-03-18 Bandvinsch

Publications (1)

Publication Number Publication Date
EP0408621A1 true EP0408621A1 (fr) 1991-01-23

Family

ID=20371740

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890903824 Withdrawn EP0408621A1 (fr) 1988-03-18 1989-03-17 Dispositif de serrage de courroie

Country Status (4)

Country Link
EP (1) EP0408621A1 (fr)
AU (1) AU3435089A (fr)
SE (1) SE8800996L (fr)
WO (1) WO1989008603A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59002642D1 (de) * 1989-06-19 1993-10-14 Spanset Inter Ag Oetwil Am See Spannratsche für einen zurrgurt.
WO1997017279A1 (fr) * 1995-11-10 1997-05-15 Viktor Nikolaevich Solomatenko Procede d'enroulement d'un element souple sur un tambour et tambour permettant de mettre en oeuvre ce procede
US7444718B1 (en) * 2007-07-31 2008-11-04 Vincent Chang Ratchet buckle device
FR2952878B1 (fr) * 2009-11-25 2013-02-15 Joubert Productions Dispositif tensionneur de sangles
GB2622181B (en) * 2021-12-23 2024-07-10 Loadhog Ltd Winding assembly that actuates a tensioner with a single stroke of a lever

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2146104A (en) * 1937-04-05 1939-02-07 Brainard Steel Corp Strap tensioning device
US3621888A (en) * 1969-06-09 1971-11-23 Signode Corp Tool for cotton bale ties
US3749366A (en) * 1972-05-22 1973-07-31 Kinedyne Corp Ratchet buckle
US3844317A (en) * 1973-06-18 1974-10-29 Signode Corp Strap tensioning tool
US3998429A (en) * 1976-02-19 1976-12-21 Signode Corporation Strap tensioning tool with load-sensing handle
DE3203750C2 (de) * 1982-02-04 1986-07-24 Edith 6901 Dossenheim Rutzki Spannschloß für Gurtbänder
SE453876B (sv) * 1986-07-31 1988-03-14 Abu Garcia Produktion Ab Fiskerulle med en medelst vev roterbar linspole

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8908603A1 *

Also Published As

Publication number Publication date
WO1989008603A1 (fr) 1989-09-21
SE8800996D0 (sv) 1988-03-18
SE8800996L (sv) 1989-09-19
AU3435089A (en) 1989-10-05

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