JP2014227076A - Work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work vehicle in which right and left belt parts configuring a seat belt can be properly handled in a separated state.SOLUTION: Connection mechanisms 46 and 48 for connecting right and left belt parts 45 are provided. A dimensional relationship is set so that one of the right and left belt parts 45 can be positioned on a constant-dimension side with a fixed length and so that the other one can be positioned on a long-dimension side longer than the constant-dimension side. A vehicle body 3 is provided with a holding member 50 for holding the connection mechanism 46 of the long-side belt part 45 in a state in which the long-side belt part 45 is passed to the back side of a seat back 7B of the driving seat 7.

Description

  The present invention relates to a work vehicle including a seat belt that detachably connects left and right belt portions by a connecting mechanism on a seat surface side of a driver seat that can be rotated forward.

  As a working vehicle configured as described above, in Patent Document 1, the base ends of left and right belt portions (in the document, engagement side belt / engagement side belt) constituting the seat belt are supported on the driver's seat, A configuration is shown in which one extending end of each of the left and right belt portions is provided with an engaging portion that constitutes a connecting mechanism, and the other extending end is provided with an engaged portion that constitutes a connecting mechanism. In Patent Document 1, the driver's seat is supported so as to be able to rotate forward about the horizontal axis.

  In Patent Document 1, control panels are arranged on the left and right sides of the driver seat, and a holding portion that holds the extended end of the belt portion is provided with respect to these control panels. By providing this holding part, the free end side of the left and right belt parts falls down in a state where the connection of the seat belt connecting mechanism is released, or the free end side comes into contact with the panel etc. due to vibration of the engine. The inconvenience that generates abnormal noise has been solved. As a specific configuration of the holding portion, a belt fixing hole into which the engaging portion is fitted is formed in one panel, and a protruding piece to be fitted into the engaged portion is formed in the other panel.

  As a working vehicle configured as described above, in Patent Document 2, belt portions (seat belts in the literature) are arranged on the left and right sides of the driver's seat, and base ends (lower ends in the literature) of the respective belt portions are connected to the vehicle body side. And the structure provided with the fastener which comprises a connection mechanism in the extension end of each belt part is shown.

  In Patent Document 2, a holder made of a thin spring material is supported on the right and left sides of a driver seat so as to be swingable around a support pin, and a spring for biasing the holder to a standing posture is provided. A configuration is shown in which a sheet holding portion having a structure that allows the belt portion to pass and prevents the fastener from falling off is formed at the end. In this configuration, the belt portion is inserted into the seat holding portion of the holder, so that when the seat belt is not in use, the holder stands upright and the belt portion is pulled out of the driver's seat so that the belt does not get in the way. I am doing so.

JP 2001-88657 A JP 2000-103313 A

  Taking a tractor as an example of a work vehicle, the driver's seat is provided with a seat belt that restrains the driver during work. Although this type of seat belt is also provided in a driver's seat of a passenger car, the passenger car is provided with a winding mechanism for winding up the seat belt when not in use so as not to interfere with getting on and off.

  Since the take-up mechanism increases the price of the work vehicle and requires an arrangement space, a seat belt in which the base ends of the left and right belt portions are connected and fixed to the driver's seat and the vehicle body may be used. As described above, in the case of having a non-retractable seat belt, when the extended ends of the left and right belt portions are on the upper surface of the driver's seat, it may interfere with getting on and off. As described in No. 2, a configuration for regulating the position of the extended end of the belt portion has been considered.

  However, in Patent Document 1, since the extended ends of the left and right belt portions are supported by the left and right panels, it is necessary to add a special configuration to the left and right panels. It can be envisaged that the middle will sag greatly in the form of sagging. Further, in the configuration of Patent Document 2, since the holder is provided in the left and right positions of the driver's seat so that the posture can be freely changed, the configuration is complicated, and the arrangement space for the holder is also required, so that the configuration is not realistic. In particular, considering that the driver's seat is rotated for the purpose of inspection and repair, when the left and right belt portions are on the seat surface side of the driver's seat, it is considered that the rotating operation is hindered.

  An object of the present invention is to constitute a work vehicle that can maintain a right and left belt portion constituting a seat belt in a separated state and allow good inspection and repair.

A feature of the present invention is a work vehicle including a seat belt that detachably connects left and right belt portions by a connecting mechanism on a seat surface side of a driver seat that can be rotated forward.
The left and right belt portions connect both base ends to the left and right positions on the vehicle body side, the extension end includes the connection mechanism, and one of the left and right belt portions includes a length adjustment mechanism, and The dimensional relationship is set so that the longer side is longer than the other,
A holding member for holding the coupling mechanism of the belt portion on the long side is provided in the vehicle body near the other belt base end in a state where the belt portion on the long side is passed through the back side of the driver seat. It is in the point.

According to this configuration, the coupling mechanism of the left and right belt portions is separated, and the coupling mechanism is held by the holding member in a state in which the long belt portion is passed through the back side of the seat back of the driver seat. The position of the extended end can be held at a fixed position on the belt portion on the scale side. In this state, the operation of rotating the driver's seat forward is not hindered by the belt portion on the long side, and it is possible to easily perform inspection and repair below the driver's seat. Moreover, the belt part on the long side does not droop greatly.
Accordingly, a work vehicle has been constructed that can maintain the left and right belt portions constituting the seat belt in a separated state and allow good inspection and repair.

  In the present invention, the holding member integrally includes a first holding portion that holds the connection mechanism of the belt portion on the long side and a second holding portion that holds the connection mechanism of the shorter belt portion. You may have the structure formed in.

  According to this, the long side belt portion connecting mechanism is held in the first holding portion, and the belt portion connecting mechanism shorter than the long side is held in the second holding portion, whereby the left and right belt portions are connected. The position of the extended end is regulated to securely open the seat surface side of the driver seat. In addition, the configuration of the holding member is simplified by using a single holding member without using a plurality of holding members.

  According to the present invention, an engagement piece as the connection mechanism is provided on one of the left and right belt portions, and a buckle as the connection mechanism that reaches a connected state when the engagement piece is inserted includes the left and right belt portions. One of the first holding part and the second holding part may be formed in the same shape as the engagement piece.

  According to this, the first holding portion or the second holding portion formed in the same shape as the engagement piece is inserted into the buckle as the connecting mechanism, so that they can be connected and the belt portion is extended. Holds the extended end.

  In the present invention, the holding member may be provided on an upper surface of a fender on a side portion of the driver seat.

  According to this, it becomes possible to provide a holding member in the site | part largely open | released on the upper surface of a fender, and operation which hold | maintains the extension end of a belt part can be performed easily.

It is a side view of a tractor. It is a top view of the tractor rear part. It is a side view which shows the vicinity of a driver's seat. It is a rear view which shows the support structure and seatbelt of a driver's seat. It is a rear view which shows the state which supported the extension end of the seatbelt in the holding member. It is a perspective view which shows a holding member, a tongue plate, and a buckle.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
〔overall structure〕
As shown in FIGS. 1 and 2, an engine 5 housed in an engine bonnet 4 is provided at the front of a traveling vehicle body 3 having left and right front wheels 1 and left and right rear wheels 2, and a transmission case 6 is provided at the rear. A tractor as an example of a work vehicle is configured with a driving unit A at the center position of the traveling vehicle body 3.

  The working vehicle of the present invention is not limited to a tractor, and may be a vehicle having a lawn mower, a combiner, a rice transplanter, a dozer device, or a vehicle having an excavator.

  This tractor is provided with a traveling transmission system that shifts the driving force of the engine 5 in the transmission case 6 and transmits it to the left and right front wheels 1 and the left and right rear wheels 2. By connecting these working devices, the working force is transmitted from the transmission case 6 to this working device so that a tilling work or the like can be performed.

  A panel portion 11 is formed at a position continuous with the rear end of the engine bonnet 4, and a steering wheel 12 is provided behind the panel portion 11. A rear fender 13 that covers the upper part of the left and right rear wheels 2 is provided at a rear position of the traveling vehicle body 3, and a driver seat 7 is provided at a position sandwiched between the left and right rear fenders 13. Resin lever guides 14 are provided on the upper surfaces of the left and right rear fenders 13. A shift lever 15 for setting the traveling speed of the traveling vehicle body 3 is inserted in one lever guide 14 in the vertical direction, and the other lever guide 14 is inserted. 14, an elevating lever 16 for elevating the working device connected to the rear end of the traveling vehicle body 3 is inserted vertically.

  As described above, the driving unit A is configured by including the panel unit 11, the steering wheel 12, the transmission lever 15, the elevating lever 16, and the driving seat 7. The driver A is provided with a seat belt B for restraining an operator sitting on the driver seat 7 and a lops frame 17 made of a square pipe material.

  As shown in FIG. 1 and FIG. 3, a pair of left and right lift arms 22 that are swung by the driving force of a hydraulic lift cylinder 21 are provided on the rear end side of the transmission case 6. An external take-out shaft 23 is formed on the rear end surface so as to protrude rearward. The left and right rear fenders 13 are supported on the side surface of the mission case 6, and the lower end of the lops frame 17 is connected and fixed to the left and right side surfaces of the mission case.

[Driver seat support structure]
As shown in FIGS. 3 and 4, the driver's seat 7 has a seat cushion 7A and a seat back 7B integrally formed, and the front position of the bottom wall of the seat cushion 7A is in a front protruding posture. A part bracket 25 is provided. At this lower position, a horizontally long connecting frame 31 that connects the left and right rear fenders 13 is disposed, and a stay 32 that extends upward with respect to the connecting frame 31 is supported. The upper end of the stay 32 and the front bracket 25 are swingably connected by a support shaft 26 in a lateral orientation. Note that a surface on which the driver is seated among the seat cushion 7A and the seat back 7B is referred to as a seating surface.

  A laterally long support frame 33 is provided on the rear upper surface of the transmission case 6, and a contact rubber 36 is supported via cushion cushions 35 on left and right support brackets 34 attached to the support frame 33. In addition, a tool box 37 for storing tools is provided immediately below the seat cushion 7 </ b> A of the driver seat 7.

  With this configuration, by setting the driver seat 7 in the working posture shown by the solid line in FIG. 3, the contact rubber 36 contacts the rear portion of the bottom wall of the seat cushion 7 </ b> A of the driver seat 7 and the posture of the driver seat 7 is determined. . In this working posture, the operator can sit down, and the vibration transmitted from the traveling vehicle body 3 to the driver seat 7 is absorbed by the cushion spring 35 and the contact rubber 36 to realize a comfortable work. Further, the rear end side of the driver seat 7 is lifted and the whole is rotated forward about the support shaft 26 so that the driver seat 7 can be set in the open posture shown by the phantom line in FIG. Has been. In this open posture, the space below the driver's seat 7 can be opened, and not only the maintenance of the mission case 6 but also the tool box 37 can be opened to take out the tool.

〔Seat belt〕
The lower end of the left belt support frame 41 is welded and fixed to the support frame 33 and the left support bracket 34, and the lower end of the right belt support frame 41 is welded and fixed to the support frame 33 and the right support bracket 34. Has been. The left and right belt support frames 41 are inclined so as to lift upward toward the outer end side, and a belt support member 42 is bolted to the outer end positions of the left and right belt support frames 41. The left and right belt support frames 41 are disposed on the outer side in the left-right direction at the rear portion of the driver seat 7 in plan view.

  The seat belt B has left and right belt portions 45, and has a connecting mechanism that detachably connects the left and right belt portions 45 on the seat surface side of the driver seat 7. The left and right belt parts are made of high-strength fibers woven in a belt shape, one side (right side in FIG. 4) is a fixed length side, and the other side (left side in FIG. 4) is from the standard side. The dimensional relationship is set so as to be on the long long side. More specifically, a fixed side (short side) belt portion 45 is disposed on the right side of the driver's seat 7, and the base end thereof is supported by the traveling vehicle body 3. Similarly, a long belt portion 45 is disposed on the left side of the driver's seat 7 and the base end thereof is supported by the traveling vehicle body 3.

  A base end of the belt portion 45 on the long side is supported by the left belt support member 42 described above, and a tongue plate 46 (specific example of an engagement piece) is connected to the extended end of the belt portion 45 as a coupling mechanism, and a belt. And a length adjusting mechanism 47 that adjusts the feeding length of the portion 45. The tongue plate 46 has a hole 46A. In this embodiment, the tongue plate 46 and the length adjusting mechanism 47 are connected to each other. However, the tongue plate 46 and the length adjusting mechanism 47 may be separated from each other.

  The base end of the fixed-side belt portion 45 is supported by the right belt support member 42 described above, and a buckle 48 is attached to the extended end of the belt portion 45 as the other coupling mechanism. The buckle 48 has an opening 48B into which the tongue plate 46 is inserted, has a lock member that fits into the hole 46A of the tongue plate 46, and includes a lock release button 48A that releases the lock by the lock member. Yes.

  The long side and the constant side of the belt part 45 may be arranged on either the left or right side of the driver seat 7. Similarly, the tongue plate 46 and the buckle 48 as the coupling mechanism may be arranged on either the long side or the fixed side (either on the left or right).

  With this configuration, an operator sits on the driver's seat 7 set in the working posture, and the tongue plates 46 and the buckles 48 are locked by inserting the tongue plates 46 of the left and right belt portions 45 into the openings 48B of the buckles 48. The state is reached, and the driver can be restrained by the seat belt B.

[Holding member]
In this tractor, the long belt portion 45 is passed through the back side of the seat back 7B of the driver's seat 7, and the tongue plate 46 of the belt portion 45 is held, and the belt portion 45 of the fixed length side is held. A holding member 50 for holding the buckle 48 is provided on the upper surface of the right rear fender 13.

  As shown in FIG. 6, the holding member 50 is connected to the rear fender 13, and the tongue plate 46 is provided at one end (rear) end with the fixing portion 50 </ b> A in close contact with the upper surface of the rear fender 13 as the center. The first holding part 51 is formed, and the second holding part 52 that holds the buckle 48 is formed at the other (front) end. Further, the holding member 50 is fixed by a connecting bolt 53 penetrating the fixing portion 50 </ b> A and the rear fender 13. Further, the holding member 50 is arranged so that the first holding portion 51 protrudes rearward from the seat back 7B of the driver seat 7 in plan view.

  The first holding portion 51 includes a vertical locking piece 51A bent upward from the fixed portion 50A, an intermediate piece 51B extending in the horizontal direction from the upper end of the vertical locking piece 51A, and downward from the extending end of the intermediate piece 51B. It has a retaining piece 51C that extends. A gap having a size slightly larger than the thickness of the tongue plate 46 is formed between the end of the retaining piece 51 </ b> C and the upper surface of the rear fender 13.

  The second holding portion 52 is formed with a holding hole portion 52 </ b> A having the same shape as the tongue plate 46. The holding member 50 is disposed on the upper surface of the rear fender 13 on the opposite side of the left and right rear fenders 13 on the side where the long belt portion 45 is disposed. When arranged on the right side of the driver seat 7, the holding member 50 is arranged on the left side of the driver seat 7.

  From such a configuration, when not in operation, the buckle 48 and the tongue plate 46 of the seat belt B are separated, and the belt portion 45 on the long side of the seat belt B as shown in FIGS. Can be passed to the back side of the seat back 7 </ b> B of the driver seat 7, and the tongue plate 46 can be held by the first holding portion 51 of the holding member 50. Further, the buckle 48 can be held as a lock by inserting the second holding part 52 of the holding member 50 into the opening 48B of the buckle 48 of the belt part 45 on the fixed side of the seat belt B. When removing the buckle 48 held by the second holding part 52, the lock release button 48A of the buckle 48 is operated.

  Thus, by holding the extended ends of the left and right belt portions 45 on the single holding member 50, the end portions on the extending side of each of the belt portions 45 in a state where the hanging of the left and right belt portions 45 is suppressed. The position of will be determined. In particular, since the holding member 50 is provided in a portion that is largely open on the upper surface of the fender 13, the holding operation of the buckle 48 and the tongue plate 46 of the seat belt B can be easily performed.

  In this state where the extended ends of the left and right belt portions 45 are supported by the holding member 50, the left and right belt portions 45 are separated from the seat cushion 7 </ b> A of the driver seat 7. The seat belt B does not hinder the operation of lifting the rear part and switching to the open position. As a result, not only the tools in the tool box 37 can be easily taken out, but also the space above the mission case 6 and the lift cylinder 21 below the driver's seat 7 is greatly opened to facilitate inspection and repair. It is.

  INDUSTRIAL APPLICABILITY The present invention can be used for a work vehicle having a seat belt that restrains an operator of a driver seat.

3 Car body (running car body)
7 Driver's seat 13 Fender (rear fender)
45 Belt part 46 Connection mechanism / engagement piece (tang plate)
47 Length adjusting mechanism 48 Connecting mechanism / buckle 50 Holding member 51 First holding portion 52 Second holding portion B Seat belt

Claims (4)

A work vehicle including a seat belt that detachably connects the left and right belt portions by a connecting mechanism on a seat surface side of a driver seat that can be rotated forward,
The left and right belt portions connect both base ends to the left and right positions on the vehicle body side, the extension end includes the connection mechanism, and one of the left and right belt portions includes a length adjustment mechanism, and The dimensional relationship is set so that the longer side is longer than the other,
A holding member for holding the coupling mechanism of the belt portion on the long side is provided in the vehicle body near the other belt base end in a state where the belt portion on the long side is passed through the back side of the driver seat. Working vehicle.   A structure in which the holding member is integrally formed with a first holding part that holds the connection mechanism of the belt part on the long side and a second holding part that holds the connection mechanism of the shorter belt part. The work vehicle according to claim 1, comprising: An engagement piece as the connection mechanism is provided on one of the left and right belt portions, and a buckle as the connection mechanism that reaches a connected state when the engagement piece is inserted is provided on the other of the left and right belt portions. And
The work vehicle according to claim 2, wherein one of the first holding portion and the second holding portion is formed in the same shape as the engagement piece.   The work vehicle according to claim 1, wherein the holding member is provided on an upper surface of a fender on a side portion of the driver seat.

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