[go: up one dir, main page]

WO2005029026A1 - Procede d'appui d'un support de charge - Google Patents

Procede d'appui d'un support de charge Download PDF

Info

Publication number
WO2005029026A1
WO2005029026A1 PCT/GB2004/003634 GB2004003634W WO2005029026A1 WO 2005029026 A1 WO2005029026 A1 WO 2005029026A1 GB 2004003634 W GB2004003634 W GB 2004003634W WO 2005029026 A1 WO2005029026 A1 WO 2005029026A1
Authority
WO
WIPO (PCT)
Prior art keywords
load
bolt
stand
support
load support
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.)
Ceased
Application number
PCT/GB2004/003634
Other languages
English (en)
Inventor
Michael Anthony Bailey
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.)
Thames Side Maywood Ltd
Original Assignee
Thames Side Maywood 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 Thames Side Maywood Ltd filed Critical Thames Side Maywood Ltd
Publication of WO2005029026A1 publication Critical patent/WO2005029026A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
    • G01L1/2206—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
    • G01L1/2243—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports the supports being parallelogram-shaped
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G21/00—Details of weighing apparatus
    • G01G21/23—Support or suspension of weighing platforms

Definitions

  • This invention relates to a method of supporting a load support of an assembly such as may be used, non-exclusively, to support a load through a load cell, and a load assembly for use in doing so.
  • assemblies comprising a load support, on which the load is supported, supported by a stand.
  • the assemblies will further comprise a load cell by means of which the stand supports the load support and a measurement of the load on the assembly can be taken. It is often necessary to provide alternate means by which the load support can be supported. Typically, this would occur when, for example, the load cell was in need of maintenance or replacement.
  • an external hydraulic jack has been used, which is inconvenient due to the necessity to supply and fit the relevant extra equipment.
  • Load cells are commonly of the form of a beam on which a load can be applied which is shaped such that a region of the beam deforms in a known manner. Strain gauges, which exhibit a known change in resistance for a given deformation, can be applied to the region. Therefore, measurement of the resistance of the strain gauges gives an indication of the load on' the load cell.
  • One commonly used load cell, the "S-beam” load cell is of the form of an S-shaped beam, with a thinned out section or sections at or near the centre of the S. The strain gauges are mounted on these thinned out sections. Such a load cell is generally supported by the top of the S and a load applied at the bottom.
  • a method of supporting a load support of an assembly relative to a stand of the assembly using a bolt, having a head and a threaded shank, and a nut, threaded complementary to the thread of the shank comprising: a) receiving the head of the bolt in a recess in a first component such that the bolt is substantially inhibited from rotating, the first component being one of the stand and the load support such that the threaded shank extends towards a second component being the remaining one of the stand and the load support; b) positioning the nut on the threaded shank immediately adjacent to the second component; and c) rotating the nut relative to the threaded shank such that the nut is forced along the threaded shank such that the nut applies a force tending to force the load support away from the stand with the head of the bolt being supported by the recess.
  • the assembly is a load cell assembly adapted to support a load through a load cell.
  • the, or each, bolt is a transit bolt.
  • transit bolts we mean bolts that may also be used to secure the stand and the load support to one another. This is especially advantageous, as it is likely that such transit bolts are likely to be to hand when replacing the load cell.
  • the step of receiving the head of the bolt in the first component may include receiving the head of the bolt in a lug depending from the stand.
  • the, or each, bolt head may be of hexagonal shape.
  • the recess may be substantially the same shape as the, or each, bolt head.
  • the method may include the steps of sliding the, or each, bolt into an open side of the, or each, recess.
  • the, or each, recess may be substantially the same shape as the, or each, recess but truncated to form the open side.
  • the recess may be of the shape of a regular hexagon missing two adjacent sides.
  • the method may include the step of further transferring the load due to the load support on to the nut.
  • Step (c) above may partially transfer the load onto the nut, and the step of further transferring may transfer the remainder, or substantially the remainder.
  • the step of further transferring may comprise removing an alternative support, such as a cranked shaft.
  • the method includes before the above steps, the steps of securing the load support to the stand with the, or each, nut and bolt.
  • the steps of securing the load support to the stand with the, or each, nut and bolt.
  • an load assembly adapted to support a load with a load cell, comprising: a load support, adapted to support a load; and a stand, adapted to, in use in an operative state, support the load support by means of a load cell, in which the stand is provided with at least one recess adapted to receive and substantially inhibit rotation of the head of a bolt, with the bolt also having a shank, the recess being arranged such that, in use in a jacked state, the shank of the, or each, bolt extends towards the load support and a nut on the shank of the bolt supports the load support.
  • This provides a load assembly which may have an alternate means of support for a load for use, for example, should the load cell require removal and replacement or repair.
  • the load support may be adapted to be, in use in a transit state, secured to the stand. This is useful for transporting the assembly when it is necessary to stop parts moving relative to each other and hence causing damage. At least one recess may be provided in the load support, which is adapted to receive the head of a bolt, such that the bolt may be used to secure the load support to the stand.
  • the load support may be adapted to be secured to the stand using transit bolts, which may be, in use, used to support the load support relative to the stand.
  • transit bolts which may be, in use, used to support the load support relative to the stand.
  • This may be achieved by having the load support formed with recesses complementary to the head of the bolt.
  • the recesses in the load support may be substantially the same shape and size as those in the stand. This enables re-use of transit bolts in jacking.
  • The, or each, recess may be adapted to inhibit rotation of the, or each, bolt head by forming the recess complementary to the bolt head.
  • the recess may form part of a regular hexagon. This enables use of standard hex-bolts.
  • The, or each, recess may have an open side such that the, or each, bolt may be slid into the recess.
  • this provides easy insertion of the, or each, bolt into the, or each recess.
  • the open side allows insertion of the bolt in the direction perpendicular to that in which the, or each, bolt head is support.
  • the recess may be an open sided regular hexagon, with two sides truncated.
  • the load support may be formed with at least one passage by means of which, in use, the shank of the, or each, bolt may pass through the load support. This allows one size of bolt to support the load support in different positions relative to the stand, as the shank of the bolt may be longer that the distance from the bolt head to the load support.
  • the passage may be a blind bore.
  • The, or each, recess in the stand may be in a lug depending from the stand.
  • the stand may have vertical walls, and the, or each, lug may depend horizontally therefrom.
  • the stand may be provided with an alternative support, which may be adapted to controllably transfer the load on to the nut.
  • the alternative support may comprise a cranked shaft.
  • Figure 1 shows a perspective view of a load cell assembly according to a first embodiment of the present invention
  • Figure 2 shows a front plan view of the load cell assembly of Figure 1 ;
  • Figure 3 shows a close up view of a jacking lug of Figure 1 with a bolt in the "transit" position;
  • Figure 4 shows a similar view to Figure 3 with the bolt in the jacking position
  • Figure 5 shows a cross-section viewed from the front of an assembly according to a second embodiment of the invention, in an operative position
  • Figure 6 shows the assembly of Figure 5 in a raised position
  • Figures 7a and 7b show the assembly of Figure 5 in an inoperative position, without and with the upper engagement means reinstalled, respectively;
  • Figure 8 shows a side view of the upper part of the assembly of Figure 5; and Figure 9 shows a side view of the lower part of the assembly of Figure 5.
  • a load cell assembly 10 according to a first embodiment of the present invention can be seen in Figures 1 to 4 of the accompanying drawings.
  • the assembly 10 is provided with a stand 22, which is fixed to a horizontal surface 46.
  • the stand 22 is of inverted U-shape, with parallel vertical walls 40 and horizontal bridge section 42 joining the tops of the walls.
  • the stand has a pin 14 mounted through the walls 40.
  • a load adapter 16 is suspended from the pin 14 between the walls 40 of the stand and fixed to a top end of a load cell 18.
  • the lower end of the load cell 18 not fixed to the adapter 16 is rigidly fixed to an intermediate member 20.
  • This intermediate member supports a loading clevis 12, which may rock on the intermediate member 20.
  • the clevis 12. is fixed to a loading bracket 30, which supports the load to be weighed. Accordingly, although the load cell assembly 10 operates by compression - in that force is applied to force the loading bracket 30 and the stand 22 together - the load cell 18 itself is in tension.
  • the stand is provided with jacking lugs 24. These are formed on the outside faces of the walls 40 of the stand 22 (that is, the faces facing away from the load cell 18) . Each lug 24 is of the form of a projection projecting horizontally outwards from the wall. Each lug is formed with a hex recess 26, which is shaped to accept a standard hex nut or bolt head, and a lip 27 underneath the hex recess 26. This lip 27 is arranged such that the bolt head or nut may rest on the lip 27 but a gap in the lip 27 allows the shank of a bolt to pass through.
  • the hex recess 26 is truncated to four sides of a regular hexagon such that a bolt head or nut can be slid into the hex recess 26 and is then not permitted to rotate or move downwards past the lip 27.
  • Identical hex recesses 28 and lips 29 are formed in the loading bracket in a position above the hex recesses 26 and lips 27 of the jacking lugs 24.
  • jacking lugs 24 are used in two situations. The first is used when the load cell assembly 10 is originally supplied to a user the load cell, as it is necessary to secure the load cell assembly 10 against unwanted internal movement. To this end, threaded transit bolts 90 are fitted to the load cell assembly 10 in a "transit" position shown in Figure 3 of the accompanying drawings. Only one side of load cell assembly 10 is shown in this Figure; however, the jacking lug 24 on the opposite side of the load cell assembly 10 is used in an identical manner. Transit bolt head 92 is held captive in load bracket hex recess 28 with a transit nut 94 tightened securely against bottom surface of jacking lug 24. The shank 96 of the transit bolt 90 passes through the gaps in the load bracket lip 29 and jacking lug lip 27. The transit nut 94 and bolt 90 force load bracket 30 securely against stand 22.
  • the second use of the jacking lugs 24 is in jacking the load. This is necessary when removing the load cell 18 or in any other situation where it is necessary to remove the force applied to the load cell 18. In these cases, the weight of the load, or any other force applied by the load to the loading bracket 30 must be taken up by other means, namely "jacking".
  • FIG. 5 to 9 of the accompanying drawings A second embodiment of the invention is depicted in Figures 5 to 9 of the accompanying drawings.
  • the load cell assembly shown is used in compression, with the assembly supporting a load above a surface such as a floor.
  • the assembly comprises a lower part 112, securable to a floor, and an upper part 110 to which a load can be secured. Both parts have a body section of the form of a plate, which can be fixed to the load or the floor as appropriate.
  • Two sets of forks 126 depend upwards from lower portion 112 and each carry a shaft 140 between the forks of each set. These shafts 140 engage and support either end of a shear beam load cell 170. This is of the form of a bar mounted at either end, with two thinned out portions 178 between the mounting points. Strain gauges (not shown) are mounted on these thinned out sections 178. Electrical connection is made to these strain gauges is made by cable 180 to the appropriate measurement apparatus. A groove 171 is provided at the middle of the top surface of the load cell 170 on which the load is applied as described below.
  • the upper part 110 also has a set of forks 111 depending from its body section. Each fork is provided with an aperture 113 through which a cranked shaft 154 may be introduced as described below.
  • the apertures 113 are spaced slightly from the body section such that the top of the aperture is lower than the bottom of the plate of the body section.
  • the upper part 110 is mounted on the load cell by means of upper engagement member 158.
  • This is of the form of a horizontal cranked shaft 154 having a handle portion 160.
  • the load cell engages the upper engagement member 158 at a central cranked portion 156 of the cranked bar 154.
  • This central cranked portion 156 also engages the body section of the upper part 110.
  • the outer, uncranked, portions 157 further engage the upper part 110 at the top of each aperture 113. Any load applied to the upper part 110, for example by placing a vessel on top of the upper part 110, will therefore pass through the upper part, the upper engagement member 158, the load cell 170 and finally the lower part 112.
  • the upper engagement mean further comprises a handle 160, which can be secured to the upper part 110 by means of a bolt 164 and a captive nut 168.
  • Each of the upper and lower parts 110, 112 have a set of support posts 143, 145 at each corner thereof, depending from the relevant part towards a matching set of support posts 145, 143 of the other part.
  • Each of the lower posts 145 has a recess 199 formed within its top surface sized to accept and secure against rotation the head 198 of a bolt 197.
  • the recess would be of hexagonal shape to retain the head of a hex-bolt.
  • the head 197 of a bolt 198 is placed within each recess 199, with the threaded shank 196 extending upwards away from the post 145.
  • Each upper post 143 is provided with a blind bore 195 open at the lower surface of the post 143 and extending upwards from the open end.
  • the bore 195 is sized to loosely fit the shank 196 of the corresponding bolt 197 such that the upper part 110 can slide vertically on the shanks 196.
  • each bolt 197 On the shank 196 of each bolt 197 is mounted a washer 194 and a nut 193.
  • the nuts 193 have a complementary thread to that of the shanks 196 and may be driven up and down on the shanks 196 by rotation thereabout.
  • the washers 194 are provided on the shanks 196 between the nuts 193 and the upper part 110.
  • the nuts 193 may be driven upwards along the shanks 196 until the washers 194 are in contact with the upper posts 143. Continued rotation of the nuts 193 then causes the load to be transferred from the upper engagement member 156 to the washers 194, nuts 193, bolts 197 to the lower part 112.
  • the upper engagement member can then be rotated back to the operative position ( Figure 5 of the accompanying drawings) such that the lower part 112 supports the upper part 110 through the washers, nuts and bolts as described above.
  • the nuts 193 can be rotated until the washers 194 just contact the upper posts 143 and the upper engagement member then returned to this position, thereby transferring the load to the washers, nuts and bolts as before.
  • the load cell 170, the upper engagement member 158 and the lower shafts 140 may therefore safely be removed, to leave the assembly in the position of Figure 7 a of the accompanying drawings .
  • the upper engagement member 158 can then be reintroduced into the assembly ( Figure 7b of the accompanying drawings) . This ensures that the two parts of the assembly cannot separate due to upwards forces on the upper part. This a further safety feature, as the load may be restrained from toppling etc. by the assembly.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

L'invention concerne un procédé d'appui d'un support de charge d'un ensemble par rapport à un bâti de l'ensemble au moyen d'un boulon comportant une tête et une tige filetée, et d'un écrou fileté de façon complémentaire à la tige. Ledit procédé consiste à loger la tête du boulon dans une cavité d'un premier composant de manière que le boulon est essentiellement bloqué contre la rotation, le premier composant étant le bâti ou le support de charge de telle manière que la tige fileté s'étend vers l'extérieur en direction d'un deuxième composant étant l'élément restant parmi bâti et support de charge; à disposer l'écrou sur la tige filetée de façon directement adjacente au deuxième composant; et, à tourner l'écrou par rapport à la tige filetée afin de forcer l'écrou le long de la tige filetée de manière que l'écrou applique une force tendant à éloigner de façon forcée le support de charge par rapport au bâti tandis que la tête du boulon est logée dans la cavité.
PCT/GB2004/003634 2003-09-19 2004-08-26 Procede d'appui d'un support de charge Ceased WO2005029026A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0321958A GB0321958D0 (en) 2003-09-19 2003-09-19 Method of supporting a load support
GB0321958.1 2003-09-19

Publications (1)

Publication Number Publication Date
WO2005029026A1 true WO2005029026A1 (fr) 2005-03-31

Family

ID=29266285

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2004/003634 Ceased WO2005029026A1 (fr) 2003-09-19 2004-08-26 Procede d'appui d'un support de charge

Country Status (2)

Country Link
GB (1) GB0321958D0 (fr)
WO (1) WO2005029026A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1094512A (fr) * 1953-11-24 1955-05-20 Perfectionnements aux dispositifs de mesures dynamométriques
US3997014A (en) * 1974-10-23 1976-12-14 S.E.G. Instrument Ab Mounting and protective means in force measuring of weighing devices
EP0639758A1 (fr) * 1993-08-18 1995-02-22 Siemens Aktiengesellschaft Plateforme de pesage extra-plate transportable
EP1111353A1 (fr) * 1999-12-21 2001-06-27 Van de Vliet, Ronny Dispositif de pesage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1094512A (fr) * 1953-11-24 1955-05-20 Perfectionnements aux dispositifs de mesures dynamométriques
US3997014A (en) * 1974-10-23 1976-12-14 S.E.G. Instrument Ab Mounting and protective means in force measuring of weighing devices
EP0639758A1 (fr) * 1993-08-18 1995-02-22 Siemens Aktiengesellschaft Plateforme de pesage extra-plate transportable
EP1111353A1 (fr) * 1999-12-21 2001-06-27 Van de Vliet, Ronny Dispositif de pesage

Also Published As

Publication number Publication date
GB0321958D0 (en) 2003-10-22

Similar Documents

Publication Publication Date Title
US5707168A (en) Heavy object lifting connector device
EP0952436B1 (fr) Montage de cellules de charge
US6331682B1 (en) Tank weigh module with excess motion restraint
CN202181179U (zh) 一种起重机配重自拆装装置
US11346707B2 (en) Weigh module lockout assembly and method
US9821987B2 (en) Adjustable universal adaptor for a lifting jack
WO1992012864A1 (fr) Dispositif de manipulation de la roue d'un vehicule
KR101511856B1 (ko) 엘리베이터의 하중측정 및 장력조정장치
CN217345353U (zh) 采油树隔离套拆装组件
WO2005029026A1 (fr) Procede d'appui d'un support de charge
CN215399256U (zh) 一种可调节支墩装置
CN213774700U (zh) 一种垂直升降装置、齿梳升降机以及塔库
JP5694982B2 (ja) ダンパーの締め付け装置及びこの装置を用いたダンパーの取り付け方法
US6220573B1 (en) Method and apparatus for hoisting a vehicular clutch
US10597269B2 (en) Lift base with retractable wheels
CN117629369A (zh) 带梁式传感器的称重模块及包括其的称重设备
CN214939211U (zh) 一种用于桥梁盖梁施工的支撑装置
CN113183024B (zh) 一种自锁拨盘装置
CN216038255U (zh) 一种水轮发电机主轴翻身及放置装置
CN220490538U (zh) 一种拉力测试设备
CN109437050B (zh) 一种用于狭窄空间内箱体垂直起重的工具
CN111717779B (zh) 一种芯轴吊装机构
CN216303021U (zh) 一种组装式吊装设备
CN215160654U (zh) 一种化工装置检修悬空管道顶起装置
CN218629237U (zh) 一种混凝土排水管外压荷载试验设备防坠落装置

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BW BY BZ CA CH CN CO CR CU CZ DK DM DZ EC EE EG ES FI GB GD GE GM HR HU ID IL IN IS JP KE KG KP KZ LC LK LR LS LT LU LV MA MD MK MN MW MX MZ NA NI NO NZ PG PH PL PT RO RU SC SD SE SG SK SY TJ TM TN TR TT TZ UA UG US UZ VN YU ZA ZM

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ NA SD SZ TZ UG ZM ZW AM AZ BY KG MD RU TJ TM AT BE BG CH CY DE DK EE ES FI FR GB GR HU IE IT MC NL PL PT RO SE SI SK TR BF CF CG CI CM GA GN GQ GW ML MR SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase