JPS6322098Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a latch structure for an adjustable carriage for changing the position of a seat structure of a vehicle, and more particularly to an adjustable and reversible seat structure. The present invention relates to a latching structure for securing the device in forward and rearward facing positions.

[Conventional technology]

In vehicles such as tractors and civil engineering vehicles, an operator must operate a control device at the front of the vehicle from the driver's seat, as well as a control device for a work machine such as a backhoe installed at the rear of the vehicle.
To this end, seats have been utilized that include adjustable carriages to allow the seat structure to be reversed between a forward operating position and a rearward operating position. Conventional seats of this type are susceptible to rattling as the movement and play of their moving parts wears out the carriage during extended use. In addition, especially in the rear operating position, which is located higher than the front operating position for operating control devices such as a backhoe, the seat is not supported very rigidly, making it extremely unstable due to wear and play. It was hot.

[Problem that the invention attempts to solve]

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned disadvantages of the conventional technology and to provide an adjustable carriage latching structure for changing the position of a vehicle seat structure in a simple and convenient manner. shall be.

[Means for solving problems]

According to the invention, the latching structure of an adjustable carriage for changing the position of a seat structure of a vehicle operator between a first and a second position with respect to the vehicle comprises
and a second surface and operatively connected to the carriage and responsive to movement of the seat structure to a corresponding one of the first and second positions, respectively.
an arm assembly having a cam movable between predetermined positions, first and second ends and an overall length between the ends, the first end being pivotally connected to the carriage; the second end having a pin that is in releasably fixed engagement with a first surface of the cam when the cam is in the first position and when the cam is in the second position; the second surface of the cam, thereby securing the seat structure in the first and second positions, the second position being in the first and second positions;
an arm assembly which is raised upwardly by the position of the arm assembly, a spring which urges the pin in a predetermined direction into releasably fixed engagement with the cam, and a screw threadedly connected to the block for adjusting the overall length of the arm assembly. It is characterized by a threaded rod and a threaded lock nut for securing the rod to the block in an adjusted position.

〔Example〕

Next, the present invention will be explained based on the embodiments shown in the drawings.

Now, in the accompanying drawings, the whole is designated by the numeral 10, and a part is designated by the numeral 11. An adjustable, reversible seat structure adapted for use in a dual-purpose vehicle is shown from one side in the forward operating position in FIG. 1 and in the rearward operating position in FIG. . The seat structure comprises an adjustable carriage, generally designated 14, and a latching structure, generally designated 15, attached to said carriage by suitable fastening devices, such as bolts 18. a seat 16, a bracket 24 and a pair of links 2 each having a stop 30, 32;
6, 28 and a reversible backrest 20 pivotally connected to the carriage at a pivot 22.

The carriage 14 includes a lower carriage substructure 36 that is mounted on the vehicle 11 and has front and rear transverse sections (not shown) that are mounted on the vehicle 11 and form a rigid rectangular structure. It has longitudinal side beams 38 spaced apart from each other by (not shown). Each of the longitudinal side beams 38 has a raised flange 40 extending upwardly from a forward end and extending upwardly and rearwardly from a rearward end at a substantially 45° angle from the top plane of the vehicle. Flange or lug 4
2. A laterally extending plate 44 interconnects the rear flanges to provide additional support for the rear flanges and also includes at least one
bolts 48 to two stop or seat supports 46
is fixed.

As best seen in FIG. 2, the upper carriage substructure 50 includes a generally rectangular base 52. As best seen in FIG. This base 52 may be formed from a rolled steel plate, for example. A pair of laterally extending channel supports 54, 56 are secured to respective forward and rearward portions of the bottom surface 58 of the base 52 to support the base 52 when the seat structure is in the forward operating position 12. It is adapted to be supported on a vehicle 11. A reinforcing plate 60 is mounted to the top surface 62 of the base and also includes an upwardly extending flange 6.
4 are fixed to the rear portion of the top surface adjacent each side of the stiffening plate. generally longitudinally upwardly and outwardly extending forward and aft end portions 68;
A pair of upright plates 66 having 70 are fixed to the stiffening plates. front and rear sideways and outwardly extending lugs or stops 74, 76, and a pair of mutually opposed seat backrests mounted on the sides and extending longitudinally and downwardly; A seat mounting member 72, including a mounting bracket 78, is secured to the upright plate. A handle 80, which will be described in more detail below, is secured to the forward portion to assist the operator in changing the position of the seat structure.

The upper and lower carriage substructures 36, 50 are pivotally interconnected at the front by a pair of rollers 82 rotatably disposed in a pair of parallel channels or tracks 84. Also, each orbit has a side beam of 3 in the longitudinal direction.
A lift extending upwardly from the front end of 8 is connected to a canopy flange 40. Said substructure is connected at the rear by a pair of mutually disposed parallel links 86 each pinned to the upwardly extending flange 64 at 88 and to one of the longitudinal sides at 90. Pivotably interconnected.

Next, in FIGS. 3 and 4, the seat structure 1
The latching structure 15 for securing 0 in the forward or reversed operating position 12, 13 is shown in detail. The latch assembly includes a cam 92 secured to a pin 90 connecting one of the links 86 to the lower carriage assembly 36 and responsive to movement of the seat assembly 94 between forward and rearward operating positions. It is constructed and arranged for movement between a forward locking position at 96 and a rear locking position shown in phantom at 96 . The cams each have respective outwardly extending fixed lobes 102, 104.
first and second fixed surfaces 98,100 having
Contains. These fixed surfaces are further interconnected by a third generally curved guide surface 106.

An adjustable arm assembly 108 cooperates with the cam 92 to secure the seat assembly 10 in either the forward or rearward operating position 12,13.
The arm structure has a first end 114 attached to the block 112.
It includes a rod 110 which is threadedly inserted therein and secured thereto by a threaded lock nut 116. The pin 118 is connected to the second end 1
20, but this second end 120 may, by way of example, be in the form of a yoke 122 connected to said rod. The block is pivotally secured to the longitudinal side 38 by bolts 124, and the pin is urged into releasably fixed engagement with the cam by a suitable biasing device, such as a coil spring 126. . The spring is secured to the carriage by a bracket 128 and extends upwardly to a second bracket 130 that is secured to the block.

Referring again to FIGS. 1 and 2, pin 118
A device for remotely disengaging the cam 92 from the cam 92 is indicated generally at 132. The disengagement device includes a generally L-shaped lever 134 pivotally connected to the carriage at a pivot 136. The lever has a first leg 138 and a second leg 140.
Contains. The first leg is longer than the second leg and is substantially flat and positioned such that it is readily accessible to the operator of the vehicle, and has an outwardly extending lifting arm 142 at one end. The department has it.
The second leg includes a flange or lug 144 extending substantially transversely outwardly therefrom, to which is secured a suitable device 146 for interconnecting the lever and arm assembly 108. has been done. For illustrative purposes, in the illustrated embodiment, a rod 146 extends from the lug 144 to a bracket 130 mounted on the block 112 interconnecting the two elements.

Once the parts are assembled as described above, the improved latching structure 15 of the present invention has general applicability wherever it is required to secure a seat structure in a fixed position. are doing. 1
One such application is to secure adjustable and reversible pilot seat structures for dual purpose vehicles in forward or reverse operating positions.

The operator's seat structure 10, which is secured to an adjustable carriage 14, seats the operator in the most effective and convenient position for steering the vehicle and operating the front mounted equipment. It is illustrated in the forward operating position 12 of FIG. 1 positioned in relation to each other. This seat structure is secured in the forward operating position by a latch structure 15. In particular, and as clearly illustrated in FIG. 3, with the cam 92 in the forward locking position 94, the force of the spring 126 applied to the arm assembly 108 causes the pin 118 to lock onto the locking surface 9.
8 and into releasably fixed engagement with the associated locking lobe 102 of the cam.

When it is necessary to actuate equipment mounted to the rear of the vehicle 11 and the associated controls, the operator's seat structure 10 is moved into an inverted operating position 13 with respect to the vehicle.
can be advantageously switched. This is accomplished by switching the backrest 20 to an inverted operating position as determined by cooperating stops 30, 74 as shown in FIG. A lifting force is therefore applied to the lifting arm 142 and associated lever 134, and this force is applied to the rod 146.
is transmitted to the arm structure 108 via the cam 92 and the pin 118, thereby separating the engagement between the cam 92 and the pin 118. seat 16
and the upper carriage substructure 50 transfers the switching force to the handle 8.
Switched backwards and upwards by the operator adding zero. In response to this movement of the seat and carriage, the cam rotates a predetermined distance to a fixed rearward position shown in phantom in FIG. During the movement of the seat and the corresponding movement of the cam between the forward and rear fixed positions, the operator applies a lifting force to the lifting arm 142 while keeping the pin and cam free of contact with each other and You can also keep flipping your seat. The spring force thus engages the generally curved surface 106 guiding the pin on the locking lobe 104 and releasably locks the pin with the lobe and also with the second locking surface 100 of the cam. It will press into engagement. If it is desired to operate the vehicle or front mounted equipment again, the seat can be returned to the forward operating position 12 by reversing the above procedure.

When the seat structure 10 is in the inverted operating position 13,
It is noted that the seat and upper carriage substructures 16, 50 are supported at the rear by a stop or seat holder 46 secured to a plate 44 extending between the rear flanges 42 of the longitudinal side 38. It should be. The seat and upper carriage substructure are supported at the front by rollers 82 and channels or tracks 84 secured to the raised flange 40. In comparison, forward actuation position 1
The seat and carriage assembly in position 2 is fully supported on the vehicle. A seat in the former position is less rigidly supported than in the latter position and therefore becomes extremely unstable and unstable due to play or wear in the pin and link connections within the carriage. It will be seen that this increases the susceptibility to vibration and switching. Thus, the total length of arm assembly 108 can be adjusted by loosening a threaded lock nut 116 positioned on rod 110, adjusting the length of the rod extending from block 112, and attaching said lock nut to said block. By fixing this rod by tightening it, it can be adjusted to the length necessary to correct the aforementioned condition.

[Effect of idea]

As explained above, the present invention makes the seat structure rigid in each position by fixedly engaging the cam connected to the carriage and the pin of the arm structure at the first and second positions. can be held stably. Also, by providing a rod that threadably engages the block to adjust the overall length of the arm structure, and a lock nut that threadably engages the rod to secure it to the block in the adjusted position, the seat structure can be adjusted. It has the advantage of being easily adjustable to eliminate looseness due to wear and play.

[Brief explanation of drawings]

1 is a side view of the seat of an operator of a vehicle embodying the invention shown in a forward operating position; FIG. 2 is a side view of the seat of an operator of the vehicle of FIG. 1 shown in a rearward operating position; 3 is an enlarged side view of one embodiment of the invention, and FIG. 4 is a top plan view of the embodiment shown in FIG. 3 with portions removed to better show elements. It is a diagram. 10... Seat structure, 11... Vehicle, 12... First position, 13... Second position, 14... Carriage, 15... Fixing device, 92... Cam, 94...
First planned position, 96...Second planned position, 98
...First surface, 100 ...Second surface, 102
...First lobe, 104...Second lobe, 1
06...Surface consisting of a curve, 108...Arm structure,
110, 112, 116... Length adjustment device, 11
4...First end, 116...Lock nut, 1
18...pin, 120...second end, 126...
... spring, 132 ... engagement and separation device, 134 ... lever, 146 ... interconnection device.

Claims (1)

[Claims for Utility Model Registration] First and second positions 12, 13 with respect to vehicle 11
a latching structure of an adjustable carriage 14 for changing the position of an operator's seat structure 10 of the vehicle 11 between the carriage 14 and the carriage 14, the latching structure having first and second surfaces 98, 100 and actuating the carriage 14; first and second positions coupled in relation to each other and responsive to movement of said seat structure 10 to a corresponding one of said first and second positions 12, 13, respectively.
cam 92 movable between predetermined positions 94, 96;
and an arm structure 108 having first and second ends 114, 120 and an entire length between the ends 114, 120.
so that the first end 114 is connected to the carriage 14
and the second end has a pin 118 that is in disengagement with the first surface 98 of the cam 92 when the cam 92 is in the first position 94. and is in releasable fixed engagement with the second surface 100 of the cam 92 when the cam 92 is in the second position 96, thereby moving the seat structure 10 into the second position. 1 and the second position 12, 13, and the second
a spring 126 for urging the pin 118 in a predetermined direction into releasably fixed engagement with the cam 92; A threaded rod 110 is threadedly connected to the block 112 for adjusting the overall length, and a threaded lock nut 116 secures the rod 110 to the block 112 in the adjusted position. A latching structure characterized by the fact that