EP1262259A1 - A hand riveting tool - Google Patents
A hand riveting tool Download PDFInfo
- Publication number
- EP1262259A1 EP1262259A1 EP02425343A EP02425343A EP1262259A1 EP 1262259 A1 EP1262259 A1 EP 1262259A1 EP 02425343 A EP02425343 A EP 02425343A EP 02425343 A EP02425343 A EP 02425343A EP 1262259 A1 EP1262259 A1 EP 1262259A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- riveting tool
- slider
- pulling
- pin
- tool according
- 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- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J15/00—Riveting
- B21J15/38—Accessories for use in connection with riveting, e.g. pliers for upsetting; Hand tools for riveting
- B21J15/386—Pliers for riveting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J15/00—Riveting
- B21J15/02—Riveting procedures
- B21J15/04—Riveting hollow rivets mechanically
- B21J15/043—Riveting hollow rivets mechanically by pulling a mandrel
Definitions
- the present invention relates to a hand riveting tool.
- the present invention relates to a hand riveting tool used to apply rivets by gripping, pulling and breaking the mandrel positioned coaxially inside each rivet.
- Customary hand riveting tools of this type usually comprise two supporting and actuating elements pivoted to each other crossways on a pivot pin about which the two elements themselves rotate. On opposite sides of the pin, each element presents a long first portion forming a handle, by which the riveting tool can be held, and a short second portion forming part of a device for gripping and pulling the rivet mandrels.
- the gripping and pulling device usually comprises: two jaws for clamping the mandrels; a slider which moves in the mandrel pulling direction and which engages with to the jaws in such a way as to drive them from an advanced position where they receive the mandrels to a retracted position where they clamp and pull the mandrels; and a slider sliding guide.
- the sliding guide is supported by the short portion of one of the two supporting and actuating elements relative to which the other element acts as a lever in such a way as to cause the slider to slide in the guide in the aforementioned pulling direction when the handles are moved towards each other.
- the short portion of the supporting and actuating element that acts as lever is coupled to the slider and, more specifically, to a curved slot made in the slider, by a second pin protruding from the short portion itself and parallel to the pivot pin which connects the two supporting and actuating elements.
- the present invention has for an object to provide a hand riveting tool that significantly reduces the average effort which the user is required to exert to grip, pull and break the rivet mandrels.
- the present invention provides a hand riveting tool for break mandrel rivets; the riveting tool comprising gripping and pulling means for engaging and pulling up the mandrels, and means for actuating the gripping and pulling means; said gripping and pulling means comprising means for clamping the mandrels and means for driving the clamping means in a mandrel pulling direction; the riveting tool being characterised in that the drive means have at least one variable length lever arm actuated by the actuating means and applying on the actuating means a resisting action that is correlated according to a constant proportionality factor to the resisting action exerted by the mandrels.
- the numeral 1 denotes in its entirety a hand riveting tool designed to apply rivets (not illustrated) of the type with break mandrels (not illustrated).
- the riveting tool 1 comprises two supporting and actuating elements 2, 3 pivoted to each other crossways on a pivot pin 4 about which the two elements 2 and 3 themselves rotate.
- the pivot pin 4 is supported at its two opposite ends by the element 2 and is rotatably fitted inside a through hole 5 made in the element 3.
- each element 2, 3 presents a long first portion 2a, 3a forming handles, 6, 7 by which the riveting tool 1 can be held, and a short second portion 2b, 3b forming part of a device 8 for gripping and pulling the rivet mandrels.
- the portion 2b is shaped to form a substantially cylindrical hollow body 9 extending transversally to the portion 2a and, at the end opposite the portion 2a, is delimited by an interchangeable nozzle 10 which receives the mandrels.
- the body 9 slidably houses and guides inside it a hollow slider 11 that can move in a straight line in a mandrel pulling direction D between a first limit position P1 ( Figure 1), where the slider 11 is close to the nozzle 10, and a second limit position P2 ( Figure 2), where the slider 11 and the nozzle 10 are positioned at a defined maximum distance from each other.
- the slider 11 rigidly supports a second pin 12, which extends transversally to the direction D and parallel to the pin 4, and which is slidably engaged in a slot 13 made in the second portion 3b of the element 3.
- the second portion 3b with the slot 13, forms a lever arm which engages with the slider 11 and whose length is given by the variable distance between the pins 4 and 12.
- the gripping and pulling device 8 further comprises two jaws 14 for gripping, clamping and pulling the mandrels.
- the jaws 14 are housed at least partially inside the slider 11 and are slidably engaged with a tapered inside wall of the slider 11.
- Each of the jaws 14 has a first end facing the nozzle 10 and a second end, opposite the first end, coupled with a truncated cone shaped pushing element 15 also positioned inside the slider 11.
- the element 15 is in turn coupled with a helical spring 16 which extends in the direction D between the element 15 itself and an end wall 17 of the slider 11, the end wall 17 being located at the end opposite the nozzle 10.
- the position shown in Figure 1 is also the position where the distance between the pins 4 and 12 is at its largest.
- the angle made by the handles 6 and 7 is at its smallest, the slider 11 is located at its position P2, the spring 16 is in position of maximum loading, the element 15 is at its largest distance from the nozzle 10 and the jaws 14 are located in a retracted mandrel pulling position where the jaws 14 themselves are closest together.
- the position shown in Figure 2 is also the position where the distance between the pins 4 and 12 is at its smallest.
- the portion 3b of the element 3, with the slot 13 acts as a resisting lever arm formed by the element 3 pivoted on the pin 4 to drive the slider 11 in the direction D away from the nozzle 10.
- the pin 12 moves in a straight line in the direction D relative to the pin 4, and the distance between the pins 4 and 12 decreases from the largest to the smallest value in proportion to the movement of the pin 12 away from the nozzle 10. Moreover, as the distance between the pins 4 and 12 decreases, the projection of this distance onto the aforementioned plane normal to the direction D remains constant.
- the slider 11 applies to the element 3 a resisting moment which, advantageously, is correlated to the resisting force of the mandrels according to a constant proportionality factor.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Insertion Pins And Rivets (AREA)
- Fuses (AREA)
- Food-Manufacturing Devices (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
A hand riveting tool (1) for break mandrel rivets
comprises two actuating and support elements (2,3)
pivoted to each other crossways on a pivot pin (4)
about which the two elements (2,3) themselves
rotate. On one side of the pin (4), each
element (2,3) presents a short portion
(2b,3b) forming part of a device (8) for gripping
and pulling the rivet mandrels. A
sliding guide (9) to guide the movement of the
slider (11) is defined by
the short portion (2b) of one of the supporting
and actuating elements (2,3) relative to which the
other element (3) acts as a lever in such a way as
to cause the slider (11) to slide in the guide (9)
in the mandrel pulling direction (D) when
the handles (6,7) are moved towards each other.
The short portion (3b) of the actuating and
support element (3) that acts as a lever has a slot
(13) which is slidably engaged with a second pin
(12) that is rigidly supported by the slider (11)
and that is parallel to the first pin (4).
Description
- The present invention relates to a hand riveting tool.
- In particular, the present invention relates to a hand riveting tool used to apply rivets by gripping, pulling and breaking the mandrel positioned coaxially inside each rivet.
- Customary hand riveting tools of this type usually comprise two supporting and actuating elements pivoted to each other crossways on a pivot pin about which the two elements themselves rotate. On opposite sides of the pin, each element presents a long first portion forming a handle, by which the riveting tool can be held, and a short second portion forming part of a device for gripping and pulling the rivet mandrels.
- In addition to the two short portions of the supporting and actuating elements, the gripping and pulling device usually comprises: two jaws for clamping the mandrels; a slider which moves in the mandrel pulling direction and which engages with to the jaws in such a way as to drive them from an advanced position where they receive the mandrels to a retracted position where they clamp and pull the mandrels; and a slider sliding guide. The sliding guide is supported by the short portion of one of the two supporting and actuating elements relative to which the other element acts as a lever in such a way as to cause the slider to slide in the guide in the aforementioned pulling direction when the handles are moved towards each other.
- The short portion of the supporting and actuating element that acts as lever is coupled to the slider and, more specifically, to a curved slot made in the slider, by a second pin protruding from the short portion itself and parallel to the pivot pin which connects the two supporting and actuating elements.
- In a riveting tool of this type, the average effort that the user has to exert in order to grip, pull and break off the rivet mandrels is quite considerable since the slider operates on the supporting and actuating element that acts as a resisting lever arm whose length is constant and equal to the distance between the first pin and the second and whose projection onto a plane normal to the aforementioned pulling direction increases as the angle made by the two handles decreases. In other terms, this type of coupling between the lever and the slider disadvantageously amplifies the resisting action of the mandrels.
- The present invention has for an object to provide a hand riveting tool that significantly reduces the average effort which the user is required to exert to grip, pull and break the rivet mandrels.
- Accordingly, the present invention provides a hand riveting tool for break mandrel rivets; the riveting tool comprising gripping and pulling means for engaging and pulling up the mandrels, and means for actuating the gripping and pulling means; said gripping and pulling means comprising means for clamping the mandrels and means for driving the clamping means in a mandrel pulling direction; the riveting tool being characterised in that the drive means have at least one variable length lever arm actuated by the actuating means and applying on the actuating means a resisting action that is correlated according to a constant proportionality factor to the resisting action exerted by the mandrels.
- The invention will now be described with reference to the accompanying drawings which illustrate a preferred embodiment of it and in which:
- Figure 1 is a side view, with some parts in cross section, of a preferred embodiment of the hand riveting tool according to the present invention, in a first working position; and
- Figure 2 shows the riveting tool of Figure 1 in a second working position.
- With reference to Figures 1 and 2, the numeral 1 denotes in its entirety a hand riveting tool designed to apply rivets (not illustrated) of the type with break mandrels (not illustrated).
- The riveting tool 1 comprises two supporting and actuating
elements pivot pin 4 about which the twoelements pivot pin 4 is supported at its two opposite ends by theelement 2 and is rotatably fitted inside athrough hole 5 made in theelement 3. - On opposite sides of the
pin 4, eachelement first portion short second portion device 8 for gripping and pulling the rivet mandrels. - Looking in more detail, the
portion 2b is shaped to form a substantially cylindricalhollow body 9 extending transversally to theportion 2a and, at the end opposite theportion 2a, is delimited by aninterchangeable nozzle 10 which receives the mandrels. - The
body 9 slidably houses and guides inside it ahollow slider 11 that can move in a straight line in a mandrel pulling direction D between a first limit position P1 (Figure 1), where theslider 11 is close to thenozzle 10, and a second limit position P2 (Figure 2), where theslider 11 and thenozzle 10 are positioned at a defined maximum distance from each other. - The
slider 11 rigidly supports asecond pin 12, which extends transversally to the direction D and parallel to thepin 4, and which is slidably engaged in aslot 13 made in thesecond portion 3b of theelement 3. - In this way, the
second portion 3b, with theslot 13, forms a lever arm which engages with theslider 11 and whose length is given by the variable distance between thepins - The gripping and
pulling device 8 further comprises twojaws 14 for gripping, clamping and pulling the mandrels. - The
jaws 14 are housed at least partially inside theslider 11 and are slidably engaged with a tapered inside wall of theslider 11. Each of thejaws 14 has a first end facing thenozzle 10 and a second end, opposite the first end, coupled with a truncated cone shaped pushingelement 15 also positioned inside theslider 11. - The
element 15 is in turn coupled with ahelical spring 16 which extends in the direction D between theelement 15 itself and anend wall 17 of theslider 11, theend wall 17 being located at the end opposite thenozzle 10. - Below is a description of how the riveting tool 1 operates, starting from the working position illustrated in Figure 1. In the working position, the angle made by the
handles slider 11 is located at its position P1 where it is close to thenozzle 10, thespring 16 is in position of minimum loading, theelement 15 is at its smallest distance from thenozzle 10 and thejaws 14 are located in a forward mandrel receiving position where thejaws 14 themselves are furthest apart. - The position shown in Figure 1 is also the position where the distance between the
pins - To clamp, pull and break the rivet mandrel, the user grips the
handles - In the position shown in Figure 2, the angle made by the
handles slider 11 is located at its position P2, thespring 16 is in position of maximum loading, theelement 15 is at its largest distance from thenozzle 10 and thejaws 14 are located in a retracted mandrel pulling position where thejaws 14 themselves are closest together. The position shown in Figure 2 is also the position where the distance between thepins - Notice that when the
slider 11 is at the position P2, thepins - During the passage of the
slider 11 from the position P1 to the position P2, that is to say, as thehandles portion 3b of theelement 3, with theslot 13, acts as a resisting lever arm formed by theelement 3 pivoted on thepin 4 to drive theslider 11 in the direction D away from thenozzle 10. - The movement of the
slider 11 in the direction D causes thejaws 14 to slide relative to the tapered inside wall of theslider 11 against the opposing action of thespring 16. As a result of this sliding motion, thejaws 14 move closer to each other and, at the same time, away from thenozzle 10, to reach the position illustrated in Figure 2. - During the passage of the
slider 11 from the position P1 to the position P2, thepin 12 moves in a straight line in the direction D relative to thepin 4, and the distance between thepins pin 12 away from thenozzle 10. Moreover, as the distance between thepins slider 11 applies to theelement 3 a resisting moment which, advantageously, is correlated to the resisting force of the mandrels according to a constant proportionality factor. - It follows, therefore, that the average effort which the user exerts to grip, pull and break the rivet mandrels is significantly reduced since it is linked to the resistance of the mandrels according to a proportionality factor that remains constant as the
handles
Claims (11)
- A hand riveting tool for break mandrel rivets; the riveting tool (1) comprising gripping and pulling means (8) for engaging and pulling up the mandrels, and means (6, 7) for actuating the gripping and pulling means (8); said gripping and pulling means (8) comprising means (14) for clamping the mandrels and means (3b, 13, 9, 11) for driving the clamping means (14) in a mandrel pulling direction (D); the riveting tool (1) being characterised in that the drive means (3b, 13, 9, 11) have at least one variable length lever arm (3b, 13) actuated by the actuating means (6, 7) and applying on the actuating means (6, 7) a resisting action that is correlated according to a constant proportionality factor to the resisting action exerted by the mandrels.
- The riveting tool according to claim 1, characterised in that it comprises two supporting and actuating elements (2, 3) pivoted to each other crossways on a pivot pin (4) about which the two elements (2, 3) themselves rotate; each of the supporting and actuating elements (2, 3) presenting, on opposite sides of the pin (4), a first portion (2a, 3a) forming handles (6, 7) by which the riveting tool (1) can be held, and a second portion (2b, 3b) forming part of the gripping and pulling means (8).
- The riveting tool according to claim 2, characterised in that the lever arm (3b, 13) is a resisting lever arm (3b, 13) formed by at least part of the second portion (3b) of one of the supporting and actuating elements (2, 3).
- The riveting tool according to claim 3, characterised in that the resisting lever arm (3b, 13) varies in length according to the variation in the size of the angle made by the handles (6, 7).
- The riveting tool according to claim 4, characterised in that the projection of the resisting lever arm (3b, 13) onto a plane normal to the pulling direction (D) is constant and independent of the variation in the size of the angle made by the handles (6, 7).
- The riveting tool according to any of the foregoing claims from 3 to 5, characterised in that the actuating means (3b, 13, 9, 11) comprise a slider (11) for driving the clamping means (14) in the pulling direction (D) and a sliding guide (9) to guide the movement of the slider (11) in the pulling direction (D); the slider (11) being engaged with the resisting lever arm (3b, 13) and the guide (9) being defined by the second portion (2b) of the other of the supporting and actuating elements (2, 3).
- The riveting tool according to claim 6, characterised in that the slider (11) supports a second pin (12) parallel to the first pin (4); the second portion (3b) that forms the resisting lever arm (3b, 13) having in it a slot (13) in which the second pin (12) is slidably engaged.
- The riveting tool according to claim 7, characterised in that the second pin (12) moves in a straight line in the pulling direction (D).
- The riveting tool according to any of the foregoing claims from 6 to 8, characterised in that the clamping means (14) comprise at least two jaws (14); the slider (11) being engaged with the jaws (14) in such a way as to move the jaws (14) from an advanced mandrel receiving position where the distance between them is at its largest, to a retracted mandrel clamping and pulling position where the distance between the jaws (14) is at its smallest.
- The riveting tool according to claim 9, characterised in that it comprises elastic means (16) that oppose the clamping action of the jaws (14) and/or the sliding motion of the slider (11) in the pulling direction (D).
- The riveting tool according to claim 10, characterised in that the elastic means (16) comprise a helical spring (16).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2001BO000351A ITBO20010351A1 (en) | 2001-05-31 | 2001-05-31 | MANUAL RIVETING MACHINE |
ITBO20010351 | 2001-05-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1262259A1 true EP1262259A1 (en) | 2002-12-04 |
Family
ID=11439396
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02425343A Withdrawn EP1262259A1 (en) | 2001-05-31 | 2002-05-29 | A hand riveting tool |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1262259A1 (en) |
IT (1) | ITBO20010351A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102476158A (en) * | 2010-11-20 | 2012-05-30 | 余姚唐文工具有限公司 | Single-handle hand riveter |
CN105081183A (en) * | 2014-05-20 | 2015-11-25 | 展仪工业股份有限公司 | Rivet tool |
WO2020211068A1 (en) * | 2019-04-19 | 2020-10-22 | 杭州联和工具制造有限公司 | Riveter |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3561249A (en) * | 1968-11-29 | 1971-02-09 | Richard B Freeman | Blind rivet tool with modulated force linkage |
NL7408634A (en) * | 1974-06-26 | 1975-12-30 | Beargrip Gereedschappenfabriek | Blind-riveting tool with two pivoted halves - has one half with slotted hole engaging pins on operating means in other half |
-
2001
- 2001-05-31 IT IT2001BO000351A patent/ITBO20010351A1/en unknown
-
2002
- 2002-05-29 EP EP02425343A patent/EP1262259A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3561249A (en) * | 1968-11-29 | 1971-02-09 | Richard B Freeman | Blind rivet tool with modulated force linkage |
NL7408634A (en) * | 1974-06-26 | 1975-12-30 | Beargrip Gereedschappenfabriek | Blind-riveting tool with two pivoted halves - has one half with slotted hole engaging pins on operating means in other half |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102476158A (en) * | 2010-11-20 | 2012-05-30 | 余姚唐文工具有限公司 | Single-handle hand riveter |
CN102476158B (en) * | 2010-11-20 | 2014-12-10 | 余姚唐文工具有限公司 | Single-handle hand riveter |
CN105081183A (en) * | 2014-05-20 | 2015-11-25 | 展仪工业股份有限公司 | Rivet tool |
WO2020211068A1 (en) * | 2019-04-19 | 2020-10-22 | 杭州联和工具制造有限公司 | Riveter |
US20220203431A1 (en) * | 2019-04-19 | 2022-06-30 | Hangzhou United Tools Co., Ltd. | Hand riveter |
Also Published As
Publication number | Publication date |
---|---|
ITBO20010351A0 (en) | 2001-05-31 |
ITBO20010351A1 (en) | 2002-12-01 |
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