Door control mechanism

• US 3,990,739 A
• Filed: 02/27/1975
• Issued: 11/09/1976
• Est. Priority Date: 02/27/1975
• Status: Expired due to Term

• Current Assignee: Deere & Company
• Original Assignee: Deere & Company
• Inventors: Head, Glenn Dale
• Primary Examiner(s): Sheridan, Robert G.
• Assistant Examiner(s): Reese, Randolph A.
• Application Number:
  US05/553,743
• Time in Patent Office: 621 Days
• Field of Search: 296/56, 296/50, 296/28 D, 296/106, 298/23 R, 298/23 MD, 298/23 M, 298/23 S, 298/23 A, 298/23 B, 298/23 F, 298/23 D, 298/23 DF, 298/38, 298/22 J, 49/255, 49/279, 49/280, 49/281, 74/607, 56/346, 56/350, 56/361
• US Class Current: 296/56
• CPC Class Codes: B60J 5/108 for load transporting vehicles or public transport, e.g. lorries, trucks, buses

Abstract

A rear door control mechanism for a stack-forming implement having a compressor roof first raises the door vertically to unlatch it and then rotates the door about an elevated and horizontally transverse axis to permit stack unloading. The door control mechanism functions independently of the compression roof and other wagons'"'"' mechanical systems and assures positive door unlatching before the opening mechanism attempts to open the door.

Claims

1. In a stack forming implement with a mobile crop-receiving body and having a verticaly reciprocable compressor roof on the body for compressing the received crop, an open end through which a completed stack can pass and a door structure for said open end, an improved door control mechanism comprising:

a first lever arm mounted on a transverse cross shaft supported on the body and extending across the open end thereof;

a cross shaft sleeve coaxial with the shaft and secured to the center portion of the shaft only extending therefrom to one end portion of the shaft;

a second lever arm secured to the cross shaft sleeve end portion;

powered means connected between the body and the first lever arm for swingably moving said lever arm through a vertical arc;

means pivotally suspending the door structure from the second lever arm, rearwardly offset from the axis of rotation of the second lever arm and responsive upon swinging movement of said lever arms to move the door structure vertically;

latch means acting between the body and door structure to prevent movement of the door structure from a closed position, and responsive to upward movement of the door structure to unlatch the door structure; and

abutment means secured to the door structure, offset from the second lever arm axis of rotation, engageable with the second lever arm after the door structure is unlatched to thereafter rotatably swing the door structure as the first lever arm is moved by the powered means.

2. In a stack-forming implement with a mobile crop- receiving body having an open end through which a completed stack can pass and a door structure for said open end, a door control mechanism comprising:

a horizontally transverse cross shaft, supported on the body and extending across the open end thereof;

a pair of cross shaft sleeves, exterior to and coaxial with the cross shaft, each sleeve secured to the cross shaft at the shaft'"'"'s center portion only and extending outwardly therefrom to the end portion of said shaft;

a first lever arm secured to and extending forwardly from the cross shaft for swinging movement about a transverse axis;

a second lever arm mounted on the outward portion of a sleeve and extending rearwardly therefrom for swinging movement about a transverse axis;

powered means acting between the body and the first lever arm means to swingaby move said lever arm through a vertical arc;

means pivotally interconnecting the second lever arm and the door structure for relative movement about the second lever arm transverse axis to support said door structure and effect generally vertical movement of the door structure upon swinging movement of the second lever arm;

latch means acting between the body and door structure to prevent movement of the door structure from a closed position, and responsive to upward movement of the door structure to become unlatched; and

means engageable between the door structure and second lever arm, including a lost motion abutment means to vertically adjust the door structure a predetermined distance for latching and unlatching the latch means and for shifting the door structure about the second lever arm axis when the latch means is unlatched.

3. In a stack-forming implement with a mobile crop-receiving body having an open end through which a completed stack can pass and door for said open end, a door control mechanism comprising:

a horizontally transverse cross shaft supported on the body and extending across the open end thereof;

a pair of cross shaft sleeves exterior to and coaxial with the cross shaft, each sleeve secured to the cross shaft at the shaft'"'"'s center portion only and extending outwardly therefrom to the end portion of said shaft;

a first lever arm secured to and extending forwardly from said cross shaft;

a second lever arm mounted on a sleeve;

a lift member supported on the door;

means pivotally interconnecting the second lever arm and the lift member offset from the transverse cross shaft to support said door and effect generally vertical movement of the door upon swinging movement of said second lever arm;

powered means acting between the body and the first lever arm;

latch means acting between the body and door to prevent movement of the door from its closed position, and responsive to upward movement of the door to become unlatched; and

means engageable between the door structure and lever means, including a lost motion abutment means comprised of a slotted opening in the second lever arm and a transversely projecting pin secured to and extending from the door and passing through the slotted opening for permitting vertical adjustment of the door of a predetermined distance for latching and unlatching the latch means and for shifting the door about the second lever arm axis when the latch means is unlatched.

4. In a stack forming implement with a mobile crop-receiving body having an open end through which a completed stack can pass, the improvement comprising:

a door disposed in an initial generally upright position closing the open end of the body and arranged for limited substantially linear movement between up and down positions;

retaining means engageable directly between the door and body when the door is in its downward position and separable to enable upward movement of the door to its up position;

a transverse cross shaft supported by the body adjacent the open end thereof and including a cross shaft sleeve coaxial with said shaft, connected to the shaft at the midportion thereof and extending there from to one end of said shaft;

first and second lever means connected to the shaft and sleeve and rockable about a transverse axis, the first lever means extending forwardly from said axis and the second lever means extending rearwardly from said axis;

power means connected between the body and the first lever means for raising said lever means in a door opening phase to cause the second lever means to travel in an upward and forward arc, and in a reverse door closing phase;

means interconnecting the second lever means and the door for raising the door bodily upwardly to separate the retaining means during the upward part of the door opening phase, and for carrying the door during the remainder of said phase; and

means engageable betwen the door and the second lever means for engaging the door subsequent to separation of the retaining means for swinging the door about the aforesaid axis.