US20020056952A1 - Shock absorbing apparatus - Google Patents
Shock absorbing apparatus Download PDFInfo
- Publication number
- US20020056952A1 US20020056952A1 US09/775,631 US77563101A US2002056952A1 US 20020056952 A1 US20020056952 A1 US 20020056952A1 US 77563101 A US77563101 A US 77563101A US 2002056952 A1 US2002056952 A1 US 2002056952A1
- Authority
- US
- United States
- Prior art keywords
- leaf spring
- guideway
- traveler
- stop member
- midportion
- 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.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2230/00—Purpose; Design features
- F16F2230/0052—Physically guiding or influencing
- F16F2230/007—Physically guiding or influencing with, or used as an end stop or buffer; Limiting excessive axial separation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2238/00—Type of springs or dampers
- F16F2238/02—Springs
- F16F2238/022—Springs leaf-like, e.g. of thin, planar-like metal
Abstract
Description
- 1. Field of the Invention
- The present invention relates to a shock absorbing apparatus for absorbing a mechanical shock that occurs when a traveler running on a guideway is brought to a stop by abutting on a stop member.
- 2. Description of the Prior Art
- A traveler such as a trolley that runs on a guideway is required to be brought to a cushioned stop to convey a load to a predetermined position. It is well known to arrange a resilient member, for example, a rubber or resilient resin pad or a shock absorber to which a traveler is brought engagement resiliently before it abuts on a stop member at the predetermined position.
- However, in the case where the rubber or resilient resin pad is arranged, considerable noise is produced when the traveler brought engagement to the pad. It is also difficult to stop the traveler exactly at the predetermined position because the traveler rebounds from the pad. In the case where the shock absorber is arranged, the noise problem cannot be settled, though the traveler can be brought to an exact stop. The shock absorber comprising a piston and cylinder mechanism, fluid contained in the cylinder and a spring to urge the piston to one end position is expensive and requires large space to be attached.
- It is, therefore, a primary object of the present invention to provide a novel type of a shock absorbing apparatus capable of making a traveler that runs on a guideway stop silently and exactly at a predetermined position.
- Another object of the present invention is to provide a shock absorbing apparatus that is simple in structure and low in cost.
- Further object of the present invention is to provide a shock absorbing apparatus that can be easily disposed adjacent to a stop member on which the traveler abuts at the predetermined position.
- Still another object of the present invention is to provide a shock absorbing apparatus wherein a spring force of a leaf spring urges the traveler to a support surface of the guideway that supports the weight of the traveler when the traveler contacts with the leaf spring. Thereby the traveling speed of the traveler is decreased with keeping the traveler in a stable situation.
- An additional object of the present invention is to provide a shock absorbing apparatus wherein the leaf spring is fixed to the stop member so that the leaf spring is movable therewith when the stop member is moved to alter the predetermined position where the traveler is stopped.
- According to the present invention, the foregoing and other objects are attained by providing within an apparatus which absorbs a shock produced by an abutment of the traveler on the stop member the leaf spring that is arranged adjacent to the stop member in substantially face-to-face relationship with the guideway and comprises a midportion curved gradually apart from the guideway to be contacted by the traveler before the traveler abuts on the stop member.
- The above and other objects, features and advantages of the invention will be become more apparent from the following description taken in conjunction with the accompanying drawings wherein like references refer to like parts and wherein:
- FIG. 1 is a longitudinal sectional view of a preferred embodiment of the invention;
- FIG. 2 is a section taken along the line2-2 of FIG. 1; and
- FIG. 3 is a perspective view of a leaf spring.
- Referring now to FIG. 1, a
shock absorbing apparatus 10 in accordance with the invention is shown which absorbs a mechanical shock that is produced when a traveler such as atrolley 20 movably mounted on along guideway 30 is brought to a stop by abutting on astop member 12. As shown in FIG. 2, for the purpose of horizontally securing theguideway 30 at an upper part of a factory there is provided amount portion 34 on abase 33 of theguideway 30. Theguideway 30 has guideportions base 33. Theguide portions support portions 36 a, 36 b on each lower ends to formsupport surfaces Rollers trolley 20 are mounted on thesupport surfaces trolley 20 are guided by thesupport surfaces guideway 30 and the weight of thetrolley 20 are taken on thesupport surfaces Auxiliary surface 32 is formed on the under surface of thebase 33 in face-to-face relationship with saidsupport surfaces auxiliary surface 32 abuts with a slight clearance against the summits of therollers rollers Rollers trolley 20 are interposed betweenvertical surfaces support portions 36 a, 36 b in face-to-face relationship, thereby preventing the trolley from swinging transversely. - A
stop member 12 of theshock absorbing apparatus 10 is interposed between the supportingsurfaces auxiliary surface 32. Thestop member 12 is secured to theguideway 30 by bolting aplate 15 that abuts under surface of theguideway 30 onto thestop member 12 between thevertical surfaces support portions 36 a, 36 b between thestop member 12 and theplate 15. A shock absorbingleaf spring 11 is fixed to thefront surface 12 a of thestop member 12 at one end, being arranged substantially in face-to-face relationship withauxiliary surface 32 along theguideway 30. The free end of theleaf spring 11 abuts slightly on theauxiliary surface 32, or may abuts with slight clearance against theauxiliary surface 32. The midportion of theleaf spring 11 is curved gradually apart from theauxiliary surface 32. Aresilient member 13 is interposed between thestop member 12 and the midportion of theleaf spring 11. Theleaf sprig 11 has a flat portion that contacts with theauxiliary surface 32 between the fixed portion to thestop member 12 and the curved midportion. Theresilient member 13 is supported between thesupport surfaces leaf spring 11. - A
body 26 of thetrolley 20 is constructed of an approximately rectangular plate that has enough thickness to form a body of a construction. The upper portion of thebody 26 is disposed between thesupport surfaces auxiliary surface 32, and the lower portion thereof projects below theguideway 20 through the space betweenvertical surfaces rear axles body 26 and held thereto by nuts on threaded portions of theaxles rear rollers rear axles bearings 52, 56 at both sides of thebody 26. Front andrear rollers support surfaces rollers auxiliary surface 32 so that rollers can run alongguideway 20. Anauxiliary axle 53 is secured to thebody 26 at the upper portion thereof between the front andrear axles axles auxiliary rollers 22 are rotatably mounted on the both end portions of theauxiliary axle 53 by means of bearings at both sides of thebody 26. Theauxiliary rollers 22 support thetrolley 20 on thesupport surfaces rear rollers auxiliary rollers 22 have a slightly smaller diameter thanrollers support surfaces auxiliary rollers 22 have higher resistance to rotation than the front andrear rollers trolley 20 when theauxiliary rollers 22 make contact with thesupport surfaces rollers - Front and rear
rectangular openings 26 a are formed side by side through vertically middle portion of thebody 26.Side rollers openings 26 a. Abracket 26 is fixed bybolts 29 on the side of thebody 26. Upper and lower tabs bent horizontally from the plane of thebracket 26 are inserted into theopenings 26 a to support both ends of vertical axles on whichside rollers side rollers vertical surfaces body 26, being guided byvertical surfaces member 40 on which ahook 41 of a hoist is detachably hung. - The mode of operation of the shock absorbing apparatus will now be briefly described. The hoist is hung on the
trolley 20 byhook 41. A load is tied to the hoist to be lifted up from the ground. Thetrolley 20 is traveled along theguideway 30 to the predetermined position by an operator.Rollers support surfaces guideway 30. If therollers axles auxiliary rollers 22 abut on thesupport surfaces guideway 30. When the trolley is traveled near to thestop member 12, a contact portion 27 on the upper portion of thebody 26 contacts with theleaf spring 11 of theshock absorbing apparatus 11 to compress theleaf spring 11 toward theauxiliary surface 32.Leaf spring 11 absorbs the kinetic energy of thetrolley 20 to decrease the traveling speed, stopping thetrolley 20 exactly at the predetermined position without rebounding when thetrolley 20 abuts on thestop member 12. The spring force of theleaf spring 11 urges thetraveler 20 to the support surfaces 31 a, 31 b that support the weight of thetraveler 20 thereby bringing the traveler 20 a stop in a stable and reliable manner. - The kinetic energy of the
trolley 20 while traveling varies depending upon the weight of a load carried by the trolley. When the weight of a load is changed, theshock absorbing apparatus 10 of the present invention can be easily adjusted to absorb the kinetic energy of thetrolley 20 by altering the thickness of theleaf spring 11 to change a spring constant. - The leaf sprigs may be arranged substantially in face-to-face relationship with support surfaces31 a, 31 b. The free ends of the leaf springs abuts on the support surfaces 31 a, 31 b, and the midportion of the leaf springs are curved gradually apart from the support surfaces 31 a, 31 b.
- Further, the
rollers body 26 thereby thetrolley 20 is above the support surface on which the rollers roll. - Still further, shock absorbing
leaf spring 11 may be fixed to thebase 33 of theguideway 30. - While particular embodiments of the invention have been described, it will be understood that the invention is not limited thereto since modifications may be made by those skilled in the art, particularly in light of the foregoing teachings. It is therefore contemplated by the appended claims to cover any such modifications that incorporate those features of these improvements in the true spirit and scope of the invention.
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000345550A JP4320116B2 (en) | 2000-11-13 | 2000-11-13 | Impact shock absorber for moving body guided and supported by traveling rail |
JP2000-345550 | 2000-11-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20020056952A1 true US20020056952A1 (en) | 2002-05-16 |
US6412757B1 US6412757B1 (en) | 2002-07-02 |
Family
ID=18819564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/775,631 Expired - Fee Related US6412757B1 (en) | 2000-11-13 | 2001-02-05 | Shock absorbing apparatus |
Country Status (2)
Country | Link |
---|---|
US (1) | US6412757B1 (en) |
JP (1) | JP4320116B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7036548B2 (en) * | 2004-03-17 | 2006-05-02 | Wayne-Dalton Corp. | Method and apparatus for positioning a sectional door relative to an opening |
US7117799B2 (en) * | 2004-06-09 | 2006-10-10 | Texas Instruments Incorporated | Overhead material handling system and track block |
US8893764B2 (en) * | 2012-08-08 | 2014-11-25 | 4Front Engineered Solutions, Inc. | Overhead door decelerators and associated devices, systems, and methods |
US9533691B2 (en) * | 2013-08-16 | 2017-01-03 | Jeremiah David Heaton | Overhead rail guidance and signaling system |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3793965A (en) * | 1972-08-17 | 1974-02-26 | Ehrsam Co | Accumulating load trolley and conveyor system |
US3934516A (en) * | 1974-07-24 | 1976-01-27 | Paglia Automated Conveyor Engineering, Inc. | Batching and dispersing assembly for a conveyor system |
US4058064A (en) * | 1975-07-07 | 1977-11-15 | American Chain & Cable Company, Inc. | Power and free conveyor system with spaced apart actuation and engagement means |
US5524548A (en) * | 1995-02-09 | 1996-06-11 | Fox; Richard D. | Festoon brake system |
CA2156581C (en) * | 1995-04-20 | 2000-11-07 | Hisashi Kyotani | Conveying system |
-
2000
- 2000-11-13 JP JP2000345550A patent/JP4320116B2/en not_active Expired - Lifetime
-
2001
- 2001-02-05 US US09/775,631 patent/US6412757B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP4320116B2 (en) | 2009-08-26 |
JP2002147514A (en) | 2002-05-22 |
US6412757B1 (en) | 2002-07-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: TOYOTSU ENG. & MFG. CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:OHNO, TAKAO;NAKANO, KAZUSHIGE;REEL/FRAME:011515/0057 Effective date: 20010108 |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
AS | Assignment |
Owner name: TEMCO CORPORATION, JAPAN Free format text: CHANGE OF NAME;ASSIGNOR:TOYOTSU ENGINEERING & MANUFACTURING COMPANY LIMITED;REEL/FRAME:021936/0747 Effective date: 20071001 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20100702 |