EP0522230A1 - Jack for supporting construction works - Google Patents

Jack for supporting construction works Download PDF

Info

Publication number
EP0522230A1
EP0522230A1 EP92101229A EP92101229A EP0522230A1 EP 0522230 A1 EP0522230 A1 EP 0522230A1 EP 92101229 A EP92101229 A EP 92101229A EP 92101229 A EP92101229 A EP 92101229A EP 0522230 A1 EP0522230 A1 EP 0522230A1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
jack
clamp member
connector housing
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Withdrawn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
EP92101229A
Other languages
German (de)
English (en)
French (fr)
Inventor
Kaoru Aoyama
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.)
Shinwa Co Ltd
Original Assignee
Shinwa Co Ltd
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 Shinwa Co Ltd filed Critical Shinwa Co Ltd
Publication of EP0522230A1 publication Critical patent/EP0522230A1/en
Withdrawn legal-status Critical Current

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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
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
    • 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
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
    • E04G25/061—Shores or struts; Chocks telescopic with parts held together by positive means by pins
    • 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
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
    • E04G25/065—Shores or struts; Chocks telescopic with parts held together by positive means by a threaded nut

Definitions

  • the present invention relates to a jack used to support various types of temporary construction frames including flooring forms.
  • a form When a concrete floor is built on the foundation of a house, a form is provided at a position generally above the foundation. Often, a jack or pipe support such as the device shown in Fig. 6 is used to support the concrete form.
  • the conventional jack shown in Fig. 6 has a tubular cylinder 21 with a base plate 21a welded at its bottom end.
  • a tubular piston 22 with a piston plate 22a welded at its top end, is inserted into the cylinder 21 so that it can move axially therein.
  • a ring 15 is journaled about the cylinder 21 and is provided with female thread formed on its inner surface.
  • a male thread 16 is formed on the outer periphery at the top end of the cylinder 21.
  • the ring 15 is mated to the threads 16 of cylinder 21 so that it can rotate about an axis P.
  • a plurality of support holes 17 are provided on the outer periphery of the piston 22 along the axis.
  • An elongated axially extending slot 18 is formed on the outer periphery of the cylinder 21 and each support hole 17 of the piston 22 is exposed through the slot 18.
  • a pin 19 is selectively inserted into one of the support holes 17 through the slot 18 and is supported on the ring 15.
  • the height of the piston 22 can be adjusted by moving the piston 22 along the axis. Then, the pin 19 is inserted into one of the support holes 17 through the slot 18. The ring is then rotated until it is arranged immediately under the pin 19. Thus, the total weight carried by the piston 22 is supported only by the pin 19.
  • a jack for supporting a load includes a tubular cylinder that receives a threaded piston.
  • the cylinder has an opening at its upper end and the piston protrudes from the opening such that the overall length of the jack may be adjusted by varying the length of the piston that protrudes from the cylinder.
  • a connector housing is provided adjacent the cylinder opening. At least one clamp member is supported by the connector housing. The clamp member has a female threaded portion suitable for threadably engaging the threaded piston.
  • the height of the piston extending from the cylinder can be finely adjusted by rotating the clamp member in a condition where the clamp member threadably engages the piston and the height of the piston can be coarsely adjusted by laterally disengaging the clamp arm from the piston and sliding the piston relative to the cylinder.
  • the jack includes a tubular cylinder 1, a tubular piston 2, and a height adjusting mechanism 3.
  • the piston 2 is inserted into an opening at the top end of cylinder 1 such that the piston can move axially along their axis P.
  • a base plate 1a is welded to the bottom end of the cylinder 1 and a piston plate 2a is welded to the top end of the piston 2.
  • the height adjusting mechanism 3 includes a stopper 4 formed at the opening at the top end of the cylinder 1.
  • the stopper 4 has a tapered inner receiving surface 5 that is tapered such that it opens towards its top end.
  • a tubular connector housing 6 is journaled about the cylinder 1 at a position above the stopper 4.
  • a pair of legs 7 protrude from opposite sides of the bottom end of the housing 6. The legs 7 are fitted about the outer periphery of the stopper 4 to prevent the housing 6 from separating from the cylinder 1.
  • a gap is provided between the legs 7 and the stopper 4. Therefore, the housing 6 can rotate about the axis P and vertically move a limited distance along the axis P.
  • a pair of clamp arms 8 face each other on the outer periphery of the piston 2 in the housing 6. Openings 9 are formed at opposite sides of the housing 6.
  • a two pronged bracket 10 is formed at the top end of each clamp arm 8. Each bracket 10 extends through the opening 9 and protrudes from the housing 6.
  • a handle 11 is connected to each bracket 10 by a pin 11a. Each handle 11 can rotate around its associated pin 11a. Thus, the handles usually hang downward from the bracket 10 due to their own weight. The movement of the brackets 10, and thus the clamp arms 8 are restricted by the opening 9.
  • a female thread 12 is formed on the inside surface of the bottom end of each clamp arm 8.
  • a male thread 11 is formed on the outer periphery of the piston 2 along its entire length and the female thread 12 of each clamp arm 8 can be mated with the male thread 13.
  • a tapered supporting surface 14 is formed at the outside of the bottom end of each clamp arm 8 so that it narrows towards the bottom end.
  • each clamp arm 8 when the piston 2 is adjusted to a desired height, the female thread 12 of each clamp arm 8 is placed in engagement with the male thread 13 of the piston 2. Also, the supporting surface 14 of each clamp arm 8 contacts the receiving surface 5 of the cylinder 1. The total weight of the piston 2 and the height adjusting mechanism 3 works as the force for pressing the female thread 12 against the male thread 13 due to the interaction between the supporting surfaces 14 and receiving surface 5.
  • a temporary concrete form 32 is built on a support plate 31 of a base 30. Therefore, to use the jack of this embodiment, the approximate height of the piston 2 is set before the jack is placed between the base 30 and the concrete form 32. Then, the base plate 1a of the cylinder 1 is mounted on the support plate 31 of the base 30 to secure it with a nail or bolt. Then, as shown in Fig. 4, the handles 11 are lifted to a horizontal position and they are used to rotate the housing about the axis P.
  • the clamp arms 8 and the housing 6 rotate, their rotation is transferred from the female thread 12 to the male thread 13, and the piston 2 moves axially relative to the cylinder 1 and the height adjusting mechanism 3. Accordingly, the distance between the base plate 1a and the piston plate 2a is fine-adjusted. This fine adjustment causes the piston plate 2a of the piston 2 to contact the support plate 33 of the concrete frame 32. Therefore, the piston plate 2a can be secured to the support plate 33 with a nail or bolt.
  • a plurality of jacks are set between the base 30 and the frame 32 at the predetermined intervals.
  • the interval is determined by calculating the floor strength.
  • the clamp arms 8 are brought into contact with the receiving surface 5 of the stopper 4. Then, as shown in Fig. 5, the female thread 12 mates with the male thread 13 due to the contact between the supporting surface 14 and the receiving surface 5.
  • the height of the piston is set. Then, the jack is secured to the base 30 and frame 32 by executing the operation previously mentioned.
  • the supporting surface 14 and the receiving surface 5 receive the total weight of the piston side including the weights of the piston 2, height adjusting mechanism 3, and frame 32. Because the total weight works as the force for pressing the female thread 12 of each clamp arm 8 against the male thread 13 of the piston 2, the piston 2 does not unexpectedly lower.
  • the clamp arms 8 on the cylinder 1 and the piston 2 are secured by the female thread 12 and the male thread 13. Therefore, unlike a conventional embodiment, the securing strength is high and a large load can be supported by one jack.
  • a pair of clamp arms 8 are formed so that they can approach to or separate from the piston 2.
  • the female thread 12 screwed to the male thread 13 of the piston 2 is formed on each clamp arm 8.
  • the piston 2 is held at the predetermined height. Therefore, for this embodiment, it is unnecessary to keep the accuracy of the female threads especially high.
  • jack of the present invention by connecting the piston plate 2 of one jack to the base plate 1b of another jack.
  • the jack described herein has the advantages of requiring only simple movements to adjust the height and permitting fine height adjustments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
EP92101229A 1991-06-13 1992-01-27 Jack for supporting construction works Withdrawn EP0522230A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3142119A JP2781291B2 (ja) 1991-06-13 1991-06-13 土木建築仮設作業用支持具
JP142119/91 1991-06-13

Publications (1)

Publication Number Publication Date
EP0522230A1 true EP0522230A1 (en) 1993-01-13

Family

ID=15307850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92101229A Withdrawn EP0522230A1 (en) 1991-06-13 1992-01-27 Jack for supporting construction works

Country Status (5)

Country Link
EP (1) EP0522230A1 (ja)
JP (1) JP2781291B2 (ja)
KR (1) KR960009438B1 (ja)
AU (1) AU1036392A (ja)
TW (1) TW225572B (ja)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0725196A1 (de) * 1995-02-02 1996-08-07 Peri Gmbh Teleskopartig verlängerbare Stütze
GB2305677A (en) * 1995-09-26 1997-04-16 Viking Products Ltd Quick-deploying prop
WO1997046776A1 (en) * 1996-06-07 1997-12-11 Haworth, Inc. Portable multiple-purpose floor-ceiling column for office
GB2325012A (en) * 1997-05-06 1998-11-11 Shih Lung Li Steel post for supporting a molding board
ES2146166A1 (es) * 1997-05-06 2000-07-16 Shih Lung Li Pilar de acero para soportar un encofrado.
GB2407842A (en) * 2003-11-07 2005-05-11 Sgb Services Ltd Scaffold clamp for externally-threaded scaffold leg
CN104400736A (zh) * 2014-10-31 2015-03-11 北京卫星环境工程研究所 用于航天器大型舱段对接分解的精密微调支撑装置
CN106044612A (zh) * 2016-08-16 2016-10-26 福州大学 双速千斤顶及其工作方法
CN106522535A (zh) * 2016-10-28 2017-03-22 荆门创佳机械科技有限公司 一种连接牢固的脚手架顶撑
CN110182706A (zh) * 2018-02-22 2019-08-30 Vis有限责任公司 下部提升支撑架
USD907880S1 (en) 2018-11-29 2021-01-12 Vis, Llc Under hoist support stand
CN113277437A (zh) * 2021-05-25 2021-08-20 杭州天铭科技股份有限公司 液压千斤顶

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101643694B1 (ko) * 2014-11-12 2016-07-28 정병태 다리 착용 고소 작업대
CN106006441B (zh) * 2016-07-01 2018-05-04 海盐创通技术服务有限公司 一种防侧倾的千斤顶
JP6329678B1 (ja) * 2017-03-31 2018-05-23 有限会社小山工務店 伸縮アダプタ及びこれを備えた型枠仮支持具
CN109667423B (zh) * 2018-12-31 2023-10-17 浙江二十冶建设有限公司 一种长度可调节的模板支撑装置及调节方法
CN111677262B (zh) * 2020-06-18 2021-10-29 扬州工业职业技术学院 一种便于调节架体高度的自锁式盘扣脚手架
CN112160592B (zh) * 2020-08-26 2022-04-05 浙江信宇建设集团有限公司 一种房屋建设用支撑装置
CN112627586A (zh) * 2020-12-08 2021-04-09 湖南鸿云钢模科技有限公司 一种用于钢架构的固定装置及使用方法
CN113756608A (zh) * 2021-09-06 2021-12-07 湖北茂捷建筑有限公司 一种建筑工程用钢结构中心支撑装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH321018A (de) * 1954-09-23 1957-04-30 Beka St Aubin Ag Verstellbare metallene Stütze, z. B. für Bauzwecke
EP0349485A1 (fr) * 1988-06-28 1990-01-03 Etablissement Nanicoba Etai

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH321018A (de) * 1954-09-23 1957-04-30 Beka St Aubin Ag Verstellbare metallene Stütze, z. B. für Bauzwecke
EP0349485A1 (fr) * 1988-06-28 1990-01-03 Etablissement Nanicoba Etai

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0725196A1 (de) * 1995-02-02 1996-08-07 Peri Gmbh Teleskopartig verlängerbare Stütze
GB2305677A (en) * 1995-09-26 1997-04-16 Viking Products Ltd Quick-deploying prop
WO1997046776A1 (en) * 1996-06-07 1997-12-11 Haworth, Inc. Portable multiple-purpose floor-ceiling column for office
US5913783A (en) * 1996-06-07 1999-06-22 Haworth, Inc. Portable multiple-purpose floor-ceiling column for office
GB2325012A (en) * 1997-05-06 1998-11-11 Shih Lung Li Steel post for supporting a molding board
FR2763622A1 (fr) * 1997-05-06 1998-11-27 Lung Li Shih Poteau en acier destine a supporter une plaque de moulage
GB2325012B (en) * 1997-05-06 2000-04-26 Shih Lung Li Steel post for supporting a molding board
ES2146166A1 (es) * 1997-05-06 2000-07-16 Shih Lung Li Pilar de acero para soportar un encofrado.
GB2407842A (en) * 2003-11-07 2005-05-11 Sgb Services Ltd Scaffold clamp for externally-threaded scaffold leg
GB2407842B (en) * 2003-11-07 2006-03-01 Sgb Services Ltd Shoring system comprising a scaffold clamp
CN104400736A (zh) * 2014-10-31 2015-03-11 北京卫星环境工程研究所 用于航天器大型舱段对接分解的精密微调支撑装置
CN104400736B (zh) * 2014-10-31 2016-08-17 北京卫星环境工程研究所 用于航天器大型舱段对接分解的精密微调支撑装置
CN106044612A (zh) * 2016-08-16 2016-10-26 福州大学 双速千斤顶及其工作方法
CN106522535A (zh) * 2016-10-28 2017-03-22 荆门创佳机械科技有限公司 一种连接牢固的脚手架顶撑
CN110182706A (zh) * 2018-02-22 2019-08-30 Vis有限责任公司 下部提升支撑架
GB2572850A (en) * 2018-02-22 2019-10-16 Vis Llc Under hoist support stand
GB2572850B (en) * 2018-02-22 2022-12-14 Vis Llc Under hoist support stand
US11597637B2 (en) 2018-02-22 2023-03-07 Vis, Llc Under hoist support stand
USD907880S1 (en) 2018-11-29 2021-01-12 Vis, Llc Under hoist support stand
CN113277437A (zh) * 2021-05-25 2021-08-20 杭州天铭科技股份有限公司 液压千斤顶

Also Published As

Publication number Publication date
TW225572B (ja) 1994-06-21
JP2781291B2 (ja) 1998-07-30
AU1036392A (en) 1992-12-17
JPH04366281A (ja) 1992-12-18
KR960009438B1 (en) 1996-07-19

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