JP2007320335A - Seat belt of working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a working vehicle, improved in safety, operability, and design. <P>SOLUTION: A winding part 16Aa of a belt side 16A of a seat belt 16 is disposed in the interior of an operating lever guide 15 or below an operating lever bracket 17, and a buckle side 16B of the seat belt 16 is turnably provided in the longitudinal direction with a mounting shaft of the lower part of a stay 16Bb of the buckle 16Ba as a center. A return spring 16Be is provided on the mounting shaft of the lower part of the stay 16Bb of the buckle 16Ba, and a clearance distance L between the seat 7 of the buckle side 16B and the operating lever guide 15 is set to be narrower than the thickness 1 of the buckle 16Ba. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention includes a driver seat provided at the center of the fuselage, a seat provided at the rear of the driver seat, and between the left and right operation lever guides, which is provided so as to be rotatable forward and backward, and a belt provided at both ends of the seat. More particularly, the present invention relates to a work vehicle including a belt unit having a winding part for retracting and storing and a seat belt formed of a belt side and a buckle having an insertion tool at the tip, and more particularly, the belt side winding part of the seat belt includes an operation lever. It relates to the placement inside the guide.

  As shown in FIG. 7, the seat belt of a wheel type tractor that is an example of a conventional work vehicle includes a seat 32 at the rear part of the driver's seat 31. A winding-type seat belt 36 having a winding part 33 for winding and storing the belt on one side and having a insertion fitting 34 at the tip and a buckle 35 on the other side is provided. Since the receiving support member 37 that receives and regulates the retreat position is provided in the front and rear movable portion on the driver's seat side, when the seat belt 36 is used, the insertion fitting 34 is always on the side of the seat that is easy to take out, and the driver can insert it. It is said that the labor for searching for the metal fitting 34 can be saved and the handleability is improved (Patent Document 1).

JP-A-7-237476

However, in such a retractable seat belt, a swelled winding part at the bottom of the belt side is provided on the upper surface of the fender or the operating lever guide. In addition to being exposed to dust, problems such as deformation, rusting, failure, etc., requiring space for installation, and entering the driver's field of view, giving the layout a sense of pressure was there. In addition, because the upper part on the buckle side is provided with no room for rotation in the front-rear direction, the seat can be rotated to change the position, the seat belt does not fit the body due to the driver's body shape, the seat and fender or Since the distance from the operation lever guide is narrow, there is a problem that the buckle is in contact with the sheet and the rotated sheet cannot be easily returned to the fixed position.
Therefore, an object of the present invention is to provide a work vehicle having improved safety, operability, and design.

  For this reason, the invention described in claim 1 is a driver seat provided in the center of the fuselage, a seat provided between the rear portion of the driver seat and the left and right operation lever guides, which is provided so as to be rotatable forward and backward, and the seat. In a work vehicle provided with a winding part for winding and storing a belt provided at both ends, and a seat belt including a belt side and a buckle side having an insertion part at a tip, the belt side of the seat belt A winding part is arranged inside the operation lever guide.

  According to a second aspect of the present invention, in the work vehicle according to the first aspect, the winding portion on the belt side of the seat belt is disposed below the bracket of the operation lever.

  According to a third aspect of the present invention, in the work vehicle according to the first or second aspect, the buckle side of the seat belt is provided so as to be rotatable in the front-rear direction around the attachment shaft of the stay lower portion of the buckle. It is characterized by.

  According to a fourth aspect of the present invention, in the work vehicle according to any one of the first to third aspects, a return spring is provided on a mounting shaft of the stay lower portion of the buckle of the seat belt.

  According to a fifth aspect of the present invention, in the work vehicle according to the first to fourth aspects, the gap between the seat on the buckle side of the seat belt and the operation lever guide is the thickness of the buckle of the seat belt. It is characterized by being narrower than.

  According to the invention described in claim 1, a seat provided in the center of the fuselage, a seat provided at the rear of the driver seat, and between the left and right operation lever guides, which is pivotable forward and backward, and both ends of the seat In a work vehicle provided with a seat for winding and storing a belt and having a seat belt composed of a belt side and a buckle side having a plug portion at the tip, the belt side wind-up portion of the seat belt is provided. Because it is placed inside the operation lever guide, the winding part is not directly exposed to sunlight, wind, rain, dust, etc., and it can prevent deformation, rusting, malfunction, etc. Since it does not need to be provided, it saves space and can have an aesthetic sense. Therefore, it is possible to provide a work vehicle with improved safety, operability, and design.

  According to the second aspect of the present invention, since the belt side winding portion of the seat belt is disposed below the bracket of the operation lever, the winding portion is not directly exposed to sunlight, wind and rain, dust, etc. It is possible to prevent the occurrence of troubles such as breakdowns, and it is not necessary to provide a separate mounting space for the take-up unit, so that space is saved and an aesthetic sense can be provided. Therefore, it is possible to provide a work vehicle with improved safety, operability, and design.

  According to the invention described in claim 3, since the buckle side of the seat belt is provided so as to be pivotable in the front-rear direction around the attachment shaft at the lower portion of the stay of the buckle, the seat position change or operation due to the sliding of the seat is provided. According to the body shape of the person, the driver can fit the seat belt to the body and wear it. Therefore, a work vehicle with improved safety and operability can be provided.

  According to the fourth aspect of the present invention, since the return shaft is provided on the attachment shaft at the lower portion of the stay of the buckle of the seat belt, the buckle pivots rearward and is normally seated and used from the position where the seat is raised. When pivoting the sheet, it is possible to prevent the sheet from being obstructed by the contact of the sheet with the buckle and easily rotate the sheet. Therefore, a work vehicle with improved operability and work efficiency can be provided.

  According to the fifth aspect of the present invention, the clearance between the seat on the buckle side of the seat belt and the operation lever guide is narrower than the thickness of the buckle of the seat belt, so that the seat is normally seated and used. In this case, the buckle is not rotated rearward but stays between the seat and the operation lever guide, and the driver can quickly attach the seatbelt without having to pull the buckle from the rear each time. Therefore, a work vehicle with improved operability and work efficiency can be provided.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
FIG. 1 is a side view of a wheel tractor as an example of a work vehicle according to the present invention, and FIG. 2 is a plan view thereof. The wheel-type tractor 1 of this example includes a front wheel 2 and a rear wheel 3, a bonnet 4 is formed on a vehicle body frame 10 above the front wheel 2, and an engine 5 serving as a prime mover portion is provided inside thereof. A driver's seat 8 is provided continuously at the rear of the bonnet 4, and a handle 6 is provided at the front and a seat 7 is provided at the rear of the driver's seat 8. Reference numeral 9 denotes an ascending / descending step provided below the driver's seat 8, and reference numeral 11 denotes a lops frame provided at the rear of the aircraft.

  The seat 7 is disposed above the rear wheel 3 and between the left and right fenders 12 provided on both sides of the fuselage. The left and right fenders 12 include, for example, lower portions of various operation levers 13 such as an auxiliary transmission lever and a PTO lever, and upper portions of the operation levers 13 have long slots formed in the front-rear direction. A left / right operation lever guide 15 protruding from the lever groove 14 is provided. Further, a wind-up type seat belt 16 is provided on both sides of the seat 7.

  Next, the structure and installation position of the seat belt, which is a feature of the present invention, will be described. 3 is a rear view of the seat belt attached to both sides of the seat, FIG. 4 is a left side view of the seat and the seat belt in a fixed position, and FIG. 5 is a left side view of the seat and the seat belt when the seat is raised forward. The figure is shown. As shown in FIG. 3, the seat belt 16 has a swelled winding portion 16Aa provided on one side of both sides of the seat 7 for winding and storing the belt 16Ac at the lower portion, and an insertion fitting portion 16Ab at the upper end. It has a belt side 16A and a buckle side 16B which is provided on the other side of the seat 7 and has a buckle 16Ba which is detachably inserted and held at the upper end. In the drawings of the present application, the belt side 16A is arranged on the left side with respect to the traveling direction of the seat 7, and the buckle side 16B is arranged on the right side, but the buckle side 16B is arranged on the left side and the belt side 16A is arranged on the right side. And may be arranged.

  First, the belt side 16 </ b> A is attached by bolts to a frame or the like that the winding portion 16 </ b> Aa has below the operation lever bracket 17 provided at the lower end of the operation lever guide 15. At this time, the winding portion 16Aa may be attached to be slightly inclined forward. The case 16Ad made of a member such as plastic that houses the front end of the belt 16Ac extended to the winding portion 16Aa and the insertion fitting portion 16Ab are the dust cover that is provided on the upper surface of the operation lever bracket 17 and the operation lever bracket 17. 18 is provided between the seat 7 and the operation lever guide 15 upward and obliquely forward from a slot provided in each of the members 18.

  Thus, since the operation lever bracket 17, the dust cover 18, and the operation lever guide 15 are covered on the winding portion 16Aa, it is possible to avoid the winding portion 16Aa from rain, dust, direct sunlight, and the like. It is excellent in durability without causing problems due to rusting, clogging with dust, deformation, etc., and can have a beautiful appearance with a clean layout.

  Further, the winding portion 16Aa can be attached to the side wall inside the operation lever guide 15. FIG. 6 is a belt side rear view of the seat belt attached to the side wall inside the operation lever guide. In this case, the winding portion 16Aa is attached to the inner wall of the operation lever guide 15 with a bolt or the like. A long hole (not shown) in the front-rear direction may be provided on the inner wall of the operation lever guide 15 positioned above the attached winding portion 16Aa, and the case 16Ad may protrude upward from the long hole. With this configuration, since the operation lever guide 15 is provided on the winding portion 16Aa, the winding portion 16Aa can be avoided from rain, dust, direct sunlight, etc. It has excellent durability without causing problems due to sticking, clogging of dust, deformation, etc., and can have a beautiful appearance with a clean layout.

  On the other hand, as shown in FIG. 3, the buckle side 16B includes a buckle 16Ba at the upper end and a stay 16Bb provided below the buckle 16Ba and connected to the buckle 16Ba via the support plate 16Bc. It is fixed with a bolt to a wall plate 19 or the like at the rear end. The wall plate 19 is provided so that the upper portion is inclined rearward, and the support plate 16Bc is attached to the middle portion of the wall plate 19 along the inclination, so that the support plate 16Bc is inclined obliquely forward. Provided. The lower portion of the stay 16Bb and the support plate 16Bc are fastened by a bolt 16Bd, and the buckle 16Ba and the stay 16Bb are rotatable in the front-rear direction using the axis of the bolt 16Bd penetrating the lower portion of the stay 16Bb as a rotation fulcrum shaft. Is provided.

  Further, a return spring 16Be such as a torsion coil spring is interposed between the bolt 16Bd and the stay 16Bb, and the buckle 16Ba is always in contact with the rear wall plate 19 in the absence of a drag force. The gap L between the end of the seat 7 on the buckle side 16B and the end of the operation lever guide 15 is provided to be narrower than the thickness l of the buckle 16Ba.

  Here, as shown in FIG. 4, when the driver slides the entire seat 7 in the front-rear direction a to change the seat position or reclines the backrest of the seat 7 so that the driver can easily drive. Alternatively, the position of the buckle 16Ba can be changed by rotating the buckle 16Ba in the front-rear direction around the rotation fulcrum shaft below the stay 16Bb depending on the body shape of the driver. The bracket portion 16Ab can be inserted into the buckle 16Ba, and the seat belt 16 can be fitted to the body in the vicinity of the hipbone.

  Further, in the tractor 1 having no cabin having such a roof, as shown in FIG. 5, when the seat 7 is kept from raining or when maintenance is performed below or around the seat 7, as shown in FIG. 7 When the seat 7 is raised in the forward direction C with the front portion as the pivot point, the buckle 16Ba is brought into contact with the rear wall plate 19 by the urging force of the return spring 16Be provided below the stay 16Bb. The For this reason, when the driver rotates the seat 7 from the position in which the seat 7 is raised in the forward direction to the position where the seat 7 is normally seated and used, the buckle 16Ba can easily rotate the seat 7 without contacting the seat 7. Can do.

  Further, when the seat 7 is normally seated and rotated as shown in FIG. 4, the buckle 16Ba that is in contact with the wall plate 19 is placed between the front seat 7 and the operation lever guide 15. It is rotated by hand against the biasing force of the return spring 16Be to the position. At this time, the gap interval L between the side end portion of the seat 7 and the side end portion of the operation lever guide 15 is narrower than the thickness l of the buckle 16Ba, so that it tends to rotate rearward of the seat 7 by the urging force of the return spring 16Be. Since the buckle 16Ba cannot pass through the gap interval L, the buckle 16Ba remains between the seat 7 and the operation lever guide 15 and presses the side part of the backrest portion of the seat 7, and the driver holds the buckle 16Ba from the rear each time. The seat belt 16 can be easily attached without being pulled.

  Since the side portion of the seat 7 is made of an elastic material such as vinyl chloride, when the seat 7 is raised forward and the buckle 16Ba is rotated backward as described above, the seat 7 is returned to the normal seating position, When the buckle 16Ba is rotated forward, the buckle 16Ba is configured to be able to pass through the gap interval L by elastically deforming the side portion of the seat 7 by an external force such as the rotational force of the seat 7 or manual work.

  Further, the buckle 16Ba is pressed against and brought into contact with the backrest side portion of the seat 7 or the wall plate 19 by the urging force of the return spring 16Be. Therefore, the buckle 16Ba interferes with other parts of the buckle 16Ba due to vibrations caused by the engine 5, running, or work. Further, generation of noise can be prevented.

  As described above in detail, the tractor 1 of this example is provided between the driver's seat 8 provided at the center of the fuselage and the rear portion of the driver's seat 8 and the left and right operation lever guides 15 so as to be rotatable forward and backward. The seat 7 includes a seat belt 16 including a belt side 16A and a buckle side 16B that are provided at both ends of the seat 7 and includes a winding portion 16Aa that winds and stores the belt 16Ac and has a fitting portion 16Ab at the tip. The winding portion 16Aa on the belt side 16A of the seat belt 16 is disposed inside the operation lever guide 15 or below the operation lever bracket 17. In addition, the buckle side 16B of the seat belt 16 is provided so as to be rotatable in the front-rear direction around the attachment shaft below the stay 16Bb of the buckle 16Ba, and the return spring 16Be is attached to the attachment shaft below the stay 16Bb of the buckle 16Ba. The gap interval L between the seat 7 on the buckle side 16B and the operation lever guide 15 is made narrower than the thickness l of the buckle 16Ba.

  In the above-described example, the wheel type tractor has been described as an example of the work vehicle.However, the present invention is not limited to this, and in addition to the crawler type tractor, as a combine, or as a construction work machine, a power shovel, The present invention can be applied to any work vehicle equipped with a retractable seat belt such as a forklift as a bull tozer and further as a transport work machine.

It is a side view of the wheel type tractor as an example of the work vehicle of the present invention. It is a top view of a wheel type tractor. It is a rear view of the seatbelt attached to the both sides of the seat. FIG. 3 is a left side view of a seat and a seat belt in a fixed position state. FIG. 6 is a left side view of the seat and the seat belt when the seat is raised forward. It is a belt side rear view of the seat belt attached to the side wall inside the operation lever guide. It is the right view which expanded the seat lower part of the conventional wheel type tractor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tractor 7 Seat 8 Driver's seat 16 Seat belt 16A Belt side 16B Buckle side 16Aa Winding part 16Ab Insertion fitting part 16Ac Belt 16Ad Case 16Ba Buckle 16Bb Stay 16Bc Support plate 16Bd Bolt 16Be Return spring L Thickness gap L direction

Claims (5)

A driver's seat in the center of the aircraft,
A seat provided between the rear portion of the driver's seat and the left and right operation lever guides and capable of pivoting back and forth;
A seat belt comprising a belt side and a buckle side provided with winding portions for winding and storing the belt provided at both ends of the seat and having an insertion portion at the tip;
In a work vehicle comprising:
The work vehicle according to claim 1, wherein the winding portion on the belt side of the seat belt is disposed inside the operation lever guide.   The work vehicle according to claim 1, wherein the winding portion on the belt side of the seat belt is disposed below a bracket of the operation lever.   The work vehicle according to claim 1, wherein the buckle side of the seat belt is provided so as to be rotatable in the front-rear direction about an attachment shaft at a stay lower portion of the buckle.   The work vehicle according to claim 1, wherein a return spring is provided on an attachment shaft of a lower portion of the stay of the buckle of the seat belt.   The work vehicle according to claim 1, wherein a gap between the seat on the buckle side of the seat belt and the operation lever guide is narrower than a thickness of the buckle of the seat belt.

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