US3827618A - Ratchet arrangement for an explosion driven setting gun - Google Patents

Ratchet arrangement for an explosion driven setting gun Download PDF

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Publication number
US3827618A
US3827618A US00366579A US36657973A US3827618A US 3827618 A US3827618 A US 3827618A US 00366579 A US00366579 A US 00366579A US 36657973 A US36657973 A US 36657973A US 3827618 A US3827618 A US 3827618A
Authority
US
United States
Prior art keywords
ratchet
housing
protective cap
barrel
detent
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
US00366579A
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English (en)
Inventor
H Oesterle
F Mark
P Jochum
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Application granted granted Critical
Publication of US3827618A publication Critical patent/US3827618A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure
    • B25C1/10—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge
    • B25C1/18—Details and accessories, e.g. splinter guards, spall minimisers
    • B25C1/188—Arrangements at the forward end of the barrel, e.g. splinter guards, spall minimisers, safety arrangements, silencers, bolt retainers

Definitions

  • ABSTRACT In an explosion driven setting gun using a detachable protective cap on the forward end of the gun housing, the cap is secured against rotation by a radially displaceable ratchet mounted in the housing.
  • the ratchet is also axially displaceable so that it can be removed from locking engagement with the trailing end of the protective cap.
  • Two springs act on the ratchet, one biasing it radially inwardly and the other biasing it axially into engagement with the protective cap.
  • the gun housing For releasing the'ratchet from engagement with the protective cap, the gun housing has an opening aligned opposite the ratchet so that a member can be inserted through the opening into a notch in the ratchet for displacing it axially against the axial spring biasing action.
  • the present invention is directed to an explosion driven setting gun for driving fastening elements into a target material and, more particularly, it concerns a ratchet arrangement for detachably securing a protective cap on the forward end of the housing of the setting gun.
  • Explosion driven setting guns which include a barrel mounted for axial displacement within the gun housing and with a protective cap detachably connected to the forward end of the housing'To secure the protective cap against displacement when in use, a ratchet is located within the housing and is loaded by a spring inwardly toward the barrel.
  • the ratchet has an inwardly extending detent for engagement within an annular groove in the barrel so that the barrel cannot be moved into the firing position when the protective cap is removed.
  • the protective cap With the protective cap on the housing, the detent is displaced from the groove in the barrel and the radial displacement path of the ratchet is limited by the protective cap.
  • the cap contains at least one locking groove into which the ratchet can engage for preventing accidental disengagement of the cap from the housing.
  • Fastening element setting guns used for higher outputs must be equipped with protective caps for safety reasons. These protective caps protect the operator of the setting gun from any parts of the target material which are broken off during the fastening element driving operation.
  • such setting guns have so-called protective cap safety devices, that is, safety devices which prevent operation of the setting gun when the protective cap is detached.
  • protective cap safety devices that is, safety devices which prevent operation of the setting gun when the protective cap is detached.
  • a radially displaceable ratchet is located within the housing and is spring biased inwardly toward the barrel.
  • the ratchet has an inwardly directed detent for engagement with a groove on the barrel.
  • the safety cap is detachably secured to the housing by means of a bayonet lock. To prevent accidental release of the bayonet lock between the protective cap and the housing, the ratchet engages a locking groove formed on the cap.
  • the locking groove or grooves forthe protective cap are arranged on its trailing end, that is, the end of the cap facing oppositely to the firing direction, and the ratchet within the housing is mounted for axial displacement and is spring loaded for engagement within the locking grooves of the cap.
  • the movement of the ratchet is, so to speak, divided into two components with each component of movement having a special function. Accordingly, the radial movement of the detent on the ratchet effects the engagement and disengagement of the ratchet with the annular groove on the barrel, while the axial movement of the ratchet affords the engagement and disengagement with the locking grooves formed in the trailing end of the protective cap, and the engagement of the ratchet within the grooves prevents rotation of the cap.
  • the setting gun housing can be arranged as a closed member surrounding the ratchet so that a limit against axial radial yielding of the ratchet is afforded.
  • the ratchet is biased in the axial direction by a spring element, preferably a compression spring, into the locking groove in the protective cap. With the ratchet held by the spring action within the locking groove, accidental disengagement of the ratchet is prevented and the protective cap cannot be inadvertently separated from the gun housing.
  • the ratchet When the protective cap is to be removed from the housing, for example, for cleaning purposes, the ratchet must be disengaged from the locking grooves in the axial direction by a force acting oppositely to the force of the biasing spring. To afford access to the ratchet, it is preferable to provide an opening in the gun housing in the range of the ratchet.
  • a pointed object is inserted through the opening in the housing into a notch preferably provided in the ratchet aligned opposite the opening so that the ratchet can be displaced against the force of its biasing spring.
  • FIG. 1 is a side view, partly in section, of a fastening element setting gun, incorporating the present invention, and arranged in the operating or firing position;
  • FIG. 2 is a partial sectional view of a portion of the setting gun shown in FIG. 1 with the protective cap removed and the gun withdrawn from the target material.
  • FIG. 1 a fastening element setting gun I is shown having a housing divided into two parts la, lb.
  • the housing part 1b includes a handle 2 containing a trigger 3 which actuates a firing pin 4.
  • Axially displaceable through both of the housing parts la, lb is a barrel 5 which projects forwardly in the firing direction from the housing part la.
  • the barrel At its rear end, the barrel has a cartridge chamber 6 into which cartridges 7 are inserted for firing by the firing pin 4.
  • the gases released accelerate a piston 8 for movement in the axial direction through barrel 5, so that the piston strikes against a nail 9 inserted into the muzzle or forward end of the barrel 5.
  • the kinetic energy of the piston 8 drives the nail 9 from the barrel into the target material 11.
  • a protective cap 12 is disposed laterally about the forward end of the barrel 5 and contacts the target material into which the nail 9 is driven.
  • the protective cap is secured by means of a known bayonet lock on housing part 1a which laterally encloses the front part of the barrel 5 in the operating or firing position of the gun.
  • the protective cap is pushed in the axial direction over housing part 1a and then is rotated by a certain angular amount relative to the housing part 1a so that the cam 12a of the protective cap 12 and the cam 10 of the housing part 1a cooperate in providing the interengagement between the two.
  • a ratchet 13 In a locking groove 12b provided in the rear or trailing end of the protective cap 12.
  • the ratchet 13 is biased into the locking groove 12b by a spring 14.
  • the ratchet 13 and its spring 14 are mounted within the leading or forward end of the housing part 1a.
  • a radial bias is provided by spring 15 which presses the ratchet radially inwardly toward the outer surface of the barrel.
  • the removal is performed by inserting a pointed object through an opening 1d located in the housing part 1a opposite the ratchet and, by means of the pointed object, pushing the ratchet rearwardly against the force of the axially directed spring 14.
  • the pointed object engages a notch 13b in the surface of the ratchet for effectively displacing it. With the ratchet displaced axially out of the locking groove 12b in the trailing end of the protective cap, the cap is released and can be removed in a known manner from housing part la.
  • a stop 10 is secured on the housing part by means of a screw 18 for retaining the ratchet within the housing when the protective cap 12 is removed.
  • a so-called pressure lock is provided so that, when the gun 1 is lifted or withdrawn from the receiving material 11, the barrel 5 is forced forwardly in the driving direction by a pin 17 loaded by a spring 16 until a collar 5a on the outer surface of the rearward portion of the barrel contacts a stop on the housing part 1a which extends into the path of the collar.
  • the protective cap When the protective cap is again positioned on the housing part la, its cam 12a effects the disengagement of the detent 13a of the ratchet 13 from the annular groove 5b and, for this purpose, the forward inner edge of the ratchet 13 is provided with a suitable bevel to facilitate the relative movement of the cam 12a and the ratchet 13 so that the detent is withdrawn from the groove.
  • the barrel With the protective cap fixed to the forward end of the housing part la, the barrel can move freely rearwardly in the axial direction into the firing position by pressing the forward end of the barrel against the target material.
  • Explosion driven setting gun for driving fastening elements, such as bolts, studs and the like, into a target material, comprising a housing, a barrel mounted within said housing for displacement in its axial direction relative to said housing and having its forward end projecting outwardly from said housing, said barrel having an annular groove formed in its outer surface intermediate its ends, a protective cap detachably secured to the end of said housing from which the forward end of said barrel projects, a ratchet mounted within said housing and being radially displaceable relative to said barrel, a spring member arranged to bias said ratchet member radially inwardly toward said barrel, said ratchet includes a detent for engagement in the annular groove in said barrel, said protective cap having at least one locking groove for engaging said ratchet and said protective cap limits the radially inwardly directed movement of said ratchet, wherein the improvement comprises that said protective cap has a leading end arranged to contact the target material and a trailing end facing in the opposite direction and extending laterally around said housing
  • Explosion driven setting gun as set forth in claim 1, wherein a stop is mounted on said housing at the opposite end of said ratchet from said spring element for limiting the axial movement of said ratchet due to said spring element when said protective cap is detached.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Nozzles (AREA)
US00366579A 1972-06-07 1973-06-04 Ratchet arrangement for an explosion driven setting gun Expired - Lifetime US3827618A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2227774A DE2227774C3 (de) 1972-06-07 1972-06-07 Schutzkappensicherung an einem puJverkraftbetriebenen Bolzensetzgerät

Publications (1)

Publication Number Publication Date
US3827618A true US3827618A (en) 1974-08-06

Family

ID=5847091

Family Applications (1)

Application Number Title Priority Date Filing Date
US00366579A Expired - Lifetime US3827618A (en) 1972-06-07 1973-06-04 Ratchet arrangement for an explosion driven setting gun

Country Status (15)

Country Link
US (1) US3827618A (no)
JP (1) JPS5438751B2 (no)
AT (1) AT328384B (no)
AU (1) AU463460B2 (no)
BE (1) BE798988A (no)
CA (1) CA990001A (no)
CH (1) CH554221A (no)
DE (1) DE2227774C3 (no)
ES (1) ES414399A1 (no)
FI (1) FI54870C (no)
FR (1) FR2187500B1 (no)
GB (1) GB1395112A (no)
IT (1) IT981868B (no)
NO (1) NO133393C (no)
SE (1) SE389289B (no)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150202756A1 (en) * 2012-07-25 2015-07-23 Illinois Tool Works Inc. Indirect firing fastening tool with anti-firing trigger support

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3606514A1 (de) * 1986-02-28 1987-09-03 Hilti Ag Pulverkraftbetriebenes bolzensetzgeraet
DE19521113C2 (de) * 1995-06-09 1998-06-10 Rheinmetall Ind Ag Bolzensetzgerät

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2773259A (en) * 1954-05-17 1956-12-11 Joseph B Cox Safety shield for explosively driven tools
US2923940A (en) * 1960-02-09 Certificate of correction
US2925604A (en) * 1956-08-28 1960-02-23 Olin Mathieson Safety control means for explosively actuated tools
US3283983A (en) * 1965-05-04 1966-11-08 Omark Industries Inc Powder actuated tool
US3610504A (en) * 1968-05-20 1971-10-05 Hilti Ag Explosive-actuated bolt-setting gun

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2923940A (en) * 1960-02-09 Certificate of correction
US2773259A (en) * 1954-05-17 1956-12-11 Joseph B Cox Safety shield for explosively driven tools
US2925604A (en) * 1956-08-28 1960-02-23 Olin Mathieson Safety control means for explosively actuated tools
US3283983A (en) * 1965-05-04 1966-11-08 Omark Industries Inc Powder actuated tool
US3610504A (en) * 1968-05-20 1971-10-05 Hilti Ag Explosive-actuated bolt-setting gun

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150202756A1 (en) * 2012-07-25 2015-07-23 Illinois Tool Works Inc. Indirect firing fastening tool with anti-firing trigger support
US10252406B2 (en) * 2012-07-25 2019-04-09 Illinois Tool Works Inc. Indirect firing fastening tool with anti-firing trigger support

Also Published As

Publication number Publication date
AU5486473A (en) 1974-10-31
IT981868B (it) 1974-10-10
ES414399A1 (es) 1976-02-01
GB1395112A (en) 1975-05-21
FI54870C (fi) 1979-04-10
SE389289B (sv) 1976-11-01
DE2227774B2 (de) 1979-12-06
NO133393C (no) 1976-04-28
FR2187500A1 (no) 1974-01-18
FI54870B (fi) 1978-12-29
BE798988A (fr) 1973-08-31
CH554221A (de) 1974-09-30
AU463460B2 (en) 1975-07-24
ATA299773A (de) 1975-05-15
DE2227774C3 (de) 1980-08-14
DE2227774A1 (de) 1973-12-20
JPS4950573A (no) 1974-05-16
JPS5438751B2 (no) 1979-11-22
CA990001A (en) 1976-06-01
AT328384B (de) 1976-03-25
NO133393B (no) 1976-01-19
FR2187500B1 (no) 1978-06-23

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