US3789474A - Method for joining crosswisely extending reinforcing bars - Google Patents

Method for joining crosswisely extending reinforcing bars Download PDF

Info

Publication number
US3789474A
US3789474A US00229702A US3789474DA US3789474A US 3789474 A US3789474 A US 3789474A US 00229702 A US00229702 A US 00229702A US 3789474D A US3789474D A US 3789474DA US 3789474 A US3789474 A US 3789474A
Authority
US
United States
Prior art keywords
spacer member
bars
bar
lifting
underlying
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.)
Expired - Lifetime
Application number
US00229702A
Other languages
English (en)
Inventor
M Skold
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3789474A publication Critical patent/US3789474A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing
    • E04G21/122—Machines for joining reinforcing bars
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14—Conveying or assembling building elements
    • E04G21/16—Tools or apparatus
    • E04G21/169—Tools or apparatus specially adapted for working-up reinforcement mats
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49616—Structural member making
    • Y10T29/49623—Static structure, e.g., a building component
    • Y10T29/49632—Metal reinforcement member for nonmetallic, e.g., concrete, structural element
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53478—Means to assemble or disassemble with magazine supply
    • Y10T29/53487—Assembling means comprising hand-manipulatable implement

Definitions

  • the primary object of the invention is to provide an improved method of applying to the crosswisely extending bars a spacer clip as shown in copending application Ser. No. 3,765 filed Jan. 19, 1970 now US. Pat. No. 3,694,988, and in a continuation application filed concurrently herewith Ser. No. 229,703 filed Feb. 28, 1972.
  • An improved tool as well as an improved method is desirable, which lends itself for lifting and tying together bars of substantially heavier weight and having larger and varying cross sections, as well as to lighter weight bars of smaller cross section. Furthermore, modern day casting methods often call for the bars being tied together suspended above the deck of the mold when the tool should not be placed on the floor itself of the casting mold and when the bars are not to be further elevated.
  • the method according to the invention contemplates the use of an elongated vertically extending tool comprising a longitudinal channel or magazine for retaining a plurality of superimposed spacer clips which are placed over two crosswisely extending reinforcing bars in such a manner that the overlying one of the bars is straddled by the legs of the spacer clip.
  • Pivoted retaining means restrain movement of the underlying bar. whereupon pivoted finger means are advanced into engagement beneath the bar to lift the superposed bars into seated position in the spring clip which is ejected from the magazine during the projecting and lifting operation by actuation of a lever mechanism.
  • the crosswisely extending bars thus become tied together at their intersection with the underlying bar resting in the recess of the spring clip and the overlying bar held in position perpendicularly thereto between the legs of the spring clip in contact with the underlying bar.
  • the tool according to the invention comprises an open ended elongated magazine or channel which has a cross section substantially corresponding to the cross section of the spring clips so that they will be yieldingly retained therein.
  • the spring clip used with the tool comprises a pair of vertically extending spaced leg members which are interconnected at the top by a bridging member to define an inverted generally U- shaped body. Each leg is provided with an open recess for receiving and seating the underlying one of the two superposed bars.
  • the spring clips are provided with guide members for guiding the clips in the channel during their downward movement and a plurality of spring clips may be joined together into a cartridge by means of frangible webs and loaded as a unit into the channel of the tool.
  • spring clip to which the tool according to the invention is applicable is described in applicants copending application Ser. No. 3,765 filed Jan. 19, 1970 now US. Pat. No. 3,694,988, and in the continuation-in-part application filed concurrently herewith Ser. No. 229,703 filed Feb. 28, 1972.
  • the spring clips are individually forced out from the lower open end of the channel by actuation of a linkage arrangement mechanism which operation also actuates means for restraining the underlying bar against lateral displacement and means for lifting it together with the overlying bar into seated position in the clip when the support member or open foot of thetool is placed over the two intersecting bars.
  • the bar restraining means and the, lifting means are joumalled in the support member or foot of the tool.
  • the clip ejection means are connected to the lifting means so that they will follow the movement of the lifting means so that they will follow the movement of the lifting means while the underlying bar is restrained against the foot of the tool during the lifting movement.
  • FIG. 1 is a perspective view of a tool according to the invention.
  • FIG. 2 is a similar view showing the rear of the tool.
  • FIG. 3 is a perspective view drawn to an enlarged scale of the lower part of the tool shown in FIG. 1.
  • FIG. 4 is a perspective view drawn to an enlarged scale of the lower part of the tool of FIG. 1 showing a spacer clip in the channel in position to be ejected therefrom.
  • FIG. 5 is a perspective view drawn to an enlarged scale of the upper part of the tool shown in FIG. 1 and a weight acting upon the spacer clip cartridge.
  • FIG. 6 is a diagrammatic fragmentary sectional view of the lower part of the tool shown in FIG. 1, and showing the position of the spacer clip in a preliminary stage of the elevation of the reinforcing bars.
  • FIG. 7 is a side view drawn to a similar scale of the lower part of the tool illustrating the reinforcing bars in the process of being lifted.
  • FIG 8 is a diagrammatic longitudinal sectional view through the tool illustrating the reinforcing bars seated in the spring clip.
  • FIG. 9 is a side view of the lower part of the tool shown in FIG. 1 illustrating the commencement of the lifting operation of the reinforcing bars, the broken lines showing the position of the parts in their initial stage.
  • FIG. 10 is a detail view of the rear lower part of the tool with a stop member in contact with the upper reinforcing bars.
  • the reference numeral 10 indicates the elongated channel or slide chute in which the U-shaped spring clips 11 are slidably inserted (see FIGS. 4, 6 and 9).
  • the spring clips or cartridge downwards in the channel they may be loaded by a weight 12 (see FIG. 5).
  • the weight 12 may be provided with a stop 13 to prevent accidental displacement of the spring clips towards the upper portion of the tool when the tool is carried in an non-vertical position.
  • the weight may also be provided with a device at the rear of the upper armate portion 14 of the slide channel whereby the weight 12 may be removed from the slide chute but still connected to the tool.
  • the tool is provided at its lower end with a boxshaped support member or foot 15, in which two hookshaped members 16, 16' are pivotally mounted which serve as restraining means to hold the underlying one of the bars 17 against lateral displacement with respect to the perpendicularly extending overlying bar 17'.
  • the members 16, 16 may be spring loaded for rapid downward engagement with the reinforcing bar 17.
  • At opposite sides of the foot or support member 15 adjacent the open face of the chute are two arcuately shaped crank plates 18, 18 pivotally shown on member 15 which are provided with fingers 18", 18" adapted to be moved into a position beneath the underlying bar 17 and then to be swung upwardly to lift the superposed bars into the spring clip 11 with the underlying bar received in the recess 11'.
  • crank arms 18, 18' are journalled at the rear of the channel to the respective legs of the fork-shaped end of a rod 19 which at its other end is pivoted to the lower end of a rod 20 which is slidably mounted in a pluralityof sleeves 2 andgllJlElGS. 2 and The rod adjacent its upper end is provided with handles 21.
  • Expansion springs 22 and 22' are anchored at one end to the rear of the channel 10 and at the other end to the pivot point between the rods 19 and 20 to provide a knee joint.
  • the springs 22, 22 normally serve to hold the rods in a substantially vertical position.
  • the knee joint between the rods 20 and 19 will bias the rod 19 and swing the crank arms I 18, 18 successively to the positions shown in FIG. 6-8 to engage the underlying bar 17 as shown in FIG. 6 and lift the two bars together after the hook-shaped restraining members 16, 16 have engaged the underlying bar 17 as shown in FIG. 7.
  • the crank arms 18, 18 and the restraining members 16, 16' will be returned to their original position upon release of downward pressure on the handles under the action of the springs 22, 22.
  • the clip feeding mechanism or clip ejection mechanism comprises two U-shaped brackets 23, 23, each of which is fixed to the interior surface of each crank arm 18, 18'. These brackets thus follow the movement of the crank arms 18 and 18 and are introduced through an opening 23" in the bottom part of the channel 10 into engagement with an intermediate portion of the lowermost clip 11 which is pushed out of the channel during the lifting movement of the crank arms 18, 18' (see FIGS. 6 and 8) and continued movement of the crank arms forces the clip into engagement with the underlying bar 17 which thus is snapped into position in the recess 11' by deflection of the flexible members 11a which spring back after the bar has been received in the recess 11 (see FIG.
  • the spacer clips which are made of synthetic resilient plastic material, and preferably interconnected into the form of a cartridge by means of frangible webs and are provided at opposite sides guide pins 11" extending laterally from hook-shaped flexible members and web-shaped support members 11' which extend laterally from the leg members of the U- shaped spacer clip below the recess 11 thereof.
  • Adjacent the bottom end of the magazine or channel 10 and at opposite sides of the clip discharge opening 23" are mounted funnel shaped retainers 24, 24'.
  • the guide pins 11" and the support members 11" are introduced into the retainers 24, 24'.
  • the guide pins 11" supportedly engage the upper portion of the retainers 24, 24 while the support members 11 guidely engage the interior surfaces thereof.
  • the web like members 11" are flexed rearwardly to permit the spacer clip to be ejected in a horizontal plane, while being sheared from its associated clip in the cartridge which is retained in the magazine and automatically descends downward to a level corresponding to the height of the clip.
  • the rear lower portion of the magazine or channel 10 is provided with a vertically adjustable stop member 25 (see FIG. 10) which engages the overlying bar 17'.
  • member 25 compensates for the support provided by the mold form and serves the same purpose.
  • the advantage of the method and apparatus according to the present invention over the tool described and claimed in applicants prior US. Pat. No. 3,461,536 is that the present invention permits the tying together and lifting of substantially heavy reinforcing bars having a large cross sectional area without risking lateral displacement of the underlying bar from its position of juncture with the overlying bar.
  • the linkage arrangement according to the invention allows for application of relatively small force to lift heavy reinforcing bars.
  • the tool according to the invention can also be used for so-called over-edge reinforcing", i.e. when the reinforcing bars are arranged at a substantial distance from the mold form and not intended to be raised to a higher level therefrom. Despite the increased field of use of the tool, its weight because of its simplified construction is relatively light.
  • the tool according to the present invention operates to lift and to guide the reinforcing bars into engagement with the spring clip without the spacer member or spring clip having a cooperating lifting ramp or similar means as shown in applicants US. Pat. No. 3,461,536.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US00229702A 1971-03-02 1972-02-28 Method for joining crosswisely extending reinforcing bars Expired - Lifetime US3789474A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE02618/71A SE341257B (de) 1971-03-02 1971-03-02

Publications (1)

Publication Number Publication Date
US3789474A true US3789474A (en) 1974-02-05

Family

ID=20260311

Family Applications (1)

Application Number Title Priority Date Filing Date
US00229702A Expired - Lifetime US3789474A (en) 1971-03-02 1972-02-28 Method for joining crosswisely extending reinforcing bars

Country Status (10)

Country Link
US (1) US3789474A (de)
JP (1) JPS5219379B1 (de)
BE (1) BE780050A (de)
CA (1) CA965938A (de)
DE (2) DE2209983A1 (de)
DK (1) DK141209B (de)
FR (1) FR2127909A5 (de)
GB (1) GB1353846A (de)
NL (1) NL171921C (de)
SE (1) SE341257B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114833930A (zh) * 2022-05-09 2022-08-02 中交一公局重庆城市建设发展有限公司 一种装配式建筑混凝土预制件上预埋件的拆除设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL172686C (nl) * 1980-04-23 1983-10-03 Attema Kunststoffenind Toestel voor het op een wapeningsstaaf plaatsen van een afstandhouder.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3200488A (en) * 1963-03-29 1965-08-17 Johansson Kurt Erland Alfred Method for joining reinforcing rods and tool for carrying out the method
US3461536A (en) * 1965-09-16 1969-08-19 Skolds Patentbyra Ab H Tool for joining reinforcing bars

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3200488A (en) * 1963-03-29 1965-08-17 Johansson Kurt Erland Alfred Method for joining reinforcing rods and tool for carrying out the method
US3461536A (en) * 1965-09-16 1969-08-19 Skolds Patentbyra Ab H Tool for joining reinforcing bars

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114833930A (zh) * 2022-05-09 2022-08-02 中交一公局重庆城市建设发展有限公司 一种装配式建筑混凝土预制件上预埋件的拆除设备

Also Published As

Publication number Publication date
NL171921C (nl) 1983-06-01
GB1353846A (en) 1974-05-22
FR2127909A5 (de) 1972-10-13
CA965938A (en) 1975-04-15
DE7207955U (de) 1972-11-16
NL7202582A (de) 1972-09-05
DK141209C (de) 1980-07-21
SE341257B (de) 1971-12-20
JPS5219379B1 (de) 1977-05-27
DE2209983A1 (de) 1972-10-19
BE780050A (fr) 1972-07-17
DK141209B (da) 1980-02-04

Similar Documents

Publication Publication Date Title
US4802808A (en) Stacking apparatus for deep-drawn articles of plastics of plastics material
US3800980A (en) Pipe storing rack
US3789474A (en) Method for joining crosswisely extending reinforcing bars
US3461536A (en) Tool for joining reinforcing bars
US3057486A (en) Case stacking and conveying apparatus
US5613435A (en) Apparatus for palletizing tube sections of paper or the like
US2298006A (en) Molding apparatus
US3341072A (en) Impaling discharge assistant for denesting carrying frames for eggs
US3789491A (en) Apparatus for joining and supporting crosswisely extending reinforcing bars
US4008034A (en) Brick making machine having stripping means
US3477560A (en) Automatic accumulating down elevator
US3527132A (en) Cutting press having improved means for clamping dies on the beam
CN215046989U (zh) 一种舟皿叠放托架
CN114226112A (zh) 一种体育器材加工用静电粉末喷涂装置
US3086665A (en) Case stacking and conveying apparatus
US2732085A (en) Siempelkamp
US3924756A (en) Apparatus for stacking bricks in preparation for strapping
JPS6145827A (ja) アルミニウム型材積載装置
US4248029A (en) Case packer loading device
US803293A (en) Machine for making confectionery.
CN213163598U (zh) 连接杆自动上料装置
CN215478179U (zh) 带有型材提取装置的送料设备
CN214925246U (zh) 大纸管打钉工装
US666059A (en) Cake-rack.
JP2556481Y2 (ja) ロール製品箱詰め機