JP5315020B2 - Self-propelled crane cab seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat for an operator cab of a self-propelling crane, capable of relieving a physical burden of a crane operator operating the crane while looking upward. <P>SOLUTION: The seat for the operator cab of the self-propelling crane is configured such that, aside from a headrest for driving, a headrest 30 for operating the crane which is removably disposed on a seatback of the seat in the operator cab 1 is arranged in an upper rear region of the seatback so as to be freely positioned therein. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a cab seat for a self-propelled crane on which a traveling driver during traveling operation and a crane operator during crane operation are seated.

  The cab seat of the self-propelled crane is seated by both the traveling driver during traveling operation and the crane operator during crane operation. Since a self-propelled crane is a vehicle, its cab seat travels on a road or the like, so it is necessary to satisfy the standards in the Road Operation Law. For this reason, since the posture is to visually observe the front of the vehicle during traveling driving, the headrest rises substantially vertically from the upper part of the seat back in accordance with the position of the head in the posture of the traveling driver when looking at the front of the vehicle. Will be provided.

  On the other hand, since the boom is extended to a high place such as a building during the crane work, the crane operator takes a work posture in which the head is largely tilted backward to look up at the high place. Accordingly, the headrest of the crane operator is likely to hit the headrest, and this headrest becomes an obstacle when taking a working posture looking up at a high place. Therefore, the user sits with the upper body away from the seat back, avoids the headrest, and leans the upper body forward and tilts only the head to the back, and works in an upward posture. However, since the work is performed for a long time in such a posture, the whole body is easily fatigued, and particularly fatigue of the neck is increased.

For this reason, in Patent Document 1, a headrest that can be tilted rearward is provided at the upper portion of the backrest portion, and further, a cab chair that can accommodate the headrest in a recess formed in the upper back portion of the seat back is provided. is suggesting.
Japanese Patent Laid-Open No. 6-297899

  In the cab chair in Patent Document 1, the headrest is attached to the upper portion of the backrest portion so as to be tiltable. For this reason, the cab chair itself has a complicated structure, and the housing structure of the backrest portion must be designed to be a strong structure. In addition, it has a special structure with a specific backrest and headrest suitable for it, and becomes an expensive cab chair. Moreover, since the headrest is directly attached to the upper part of the backrest portion of the cab chair, the installation position of the headrest is limited to a narrow range. Therefore, the cab chair in Patent Document 1 still cannot arrange the headrest at the optimum position desired by the crane operator, and the degree of freedom of arrangement of the headrest is small.

  The present invention has been made paying attention to the above-mentioned problems, and the object of the present invention is to reduce the physical burden of the crane operator when operating the crane while looking up at a high place, and further, the headrest is attached to the seat. Therefore, it is an object of the present invention to provide a cab seat for a self-propelled crane that has a simple structure that can be easily attached to the crane and is easy to use.

The present invention includes a seat provided on the cab of the self-propelled crane, a travel driver's headrest mounted detachably to the seat back of the seat, provided separately from this travel the driver's headrest, the seat A crane worker's headrest installed in the upper rear region of the back so as to be freely selectable , and a support mechanism provided in the cab and movably supporting the crane worker's headrest. It is a seat for the cab of a self-propelled crane.

  According to the present invention, when having a traveling driver's headrest, when carrying out crane work at the site, the traveling driver's headrest is pulled out from the seat back portion, and the upper region of the seat back portion is opened. Can do. In addition, a crane operator's headrest instead of the traveling driver's headrest can be installed in the upper region of the seat back portion by selecting its position and orientation. Therefore, the degree of freedom of the range in which the headrest can be placed in a state where the head and neck can be placed in the optimum position is increased, and the crane operator can work while looking up at a high place in a comfortable and comfortable posture. Less fatigue. In addition, since the position of the crane operator's headrest can be adjusted in accordance with the helmet worn on the crane operator's head, the crane operator's headrest can be installed at an optimum position, and the compatibility is improved and the usability is improved. It is also possible to install the crane operator's headrest against the crane operator's neck instead of the helmet. In this case, the crane operator's headrest can be used to support the neck with the crane operator's head freely. It becomes possible to move, and it becomes easy to monitor looking up at a high place. In this way, the position of the crane operator's headrest can be selected in various ways according to the convenience of the crane operator. In particular, as in the conventional case, the crane operator can remove the upper body from the seat back so as to avoid the headrest for the traveling operator. It eliminates the need to work in an upward position where it sits away from the front, tilts its upper body forward, tilts its head back and sleeps, and therefore suffers less fatigue, especially in the neck. Further, if the crane operator's headrest and its supporting mechanism are removed from the cab seat, the crane operator's headrest and the supporting mechanism will not interfere with driving and visibility.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG.1 and FIG.2 has shown the cab 1 of the self-propelled crane seen from the side. In the cab 1, a cab seat 2 is provided on the floor surface on which a traveling driver during traveling operation and a crane operator during crane operation are seated. A front window 3 for a traveling driver to look forward is provided in a front part of the cab 1, and a skylight 4 is provided in an upper part of the cab 1 for a crane operator to look at a high place during crane work. Yes. A traveling steering wheel 5 and a hood 6 are provided in front of the cab seat 2. The hood 6 is provided with various meters. A boom telescopic operation lever 11 and a boom raising / lowering operation lever 12 which are manually operated by a crane operator sitting on the seat 2 are provided on the side of the cab seat 2. A boom telescopic operation pedal 14 and a winch operation pedal 15 which are operated by a crane operator sitting on the seat 2 with his / her foot are provided. The cab seat 2 is equipped with a seat belt device 16.

  The cab seat 2 includes a seat cushion portion 21 for seating and a seat back portion 22 against which the driver leans. The seat back portion 22 is disposed so as to rise from the vicinity of the rear end of the seat cushion portion 21 of the seat 2. The seat back portion 22 is attached so as to be tiltable with respect to the seat cushion portion 21 by a reclining mechanism 23. An armrest 24 is attached to the seat back portion 22.

  A traveling driver's headrest 25 is detachably attached to the upper portion of the seat back portion 22. A support receiving portion 27 into which the stay 26 of the traveling driver's headrest 25 is inserted is provided on the upper portion of the seat back portion 22. That is, the driving driver's headrest 25 can be detachably attached by inserting the stay 26 of the headrest 25 into the support receiving portion 27. The traveling driver's headrest 25 is designed to satisfy the standard of a vehicle that travels on a crane vehicle. Accordingly, the pad portion 28 for hitting the head of the traveling driver is located near the seat back portion 22.

  As shown in FIG. 2, the cab seat 2 is equipped with a headrest 30 used by a crane operator during crane work, in addition to the headrest 25 used during traveling operation. The crane operator headrest 30 includes a pad portion 31 for hitting the crane operator's head and a stand (mounting base) 32 as a support mechanism for supporting the pad portion 31. The stand 32 here is constituted by a link mechanism 35 using a plurality of arms (links) as shown in FIG. By changing the arm position of the link mechanism 35 or rotating the arm, the position and orientation of the pad portion 31 can be appropriately changed. And the stand 32 can select the position and direction of the pad part 31, and can fix the pad part 31 with the attitude | position. Accordingly, the orientation and position of the pad portion 31 can be freely selected.

  The specific structure of the pad support stand 32 is as shown in FIG. That is, the stand 32 has a support column 40 arranged substantially vertically, a first arm 41 attached to an upper end of the support column 40 so that one end thereof can be rotated around an axis of the support column 40, and the first arm 41. The other end of the second arm 42 is attached to the other end so as to be rotatable around an axis parallel to the axis of the support column 40, and the other end of the second arm 42 is connected by a universal joint 43 such as a ball joint. A pad connection member 44. The pad connection member 44 is attached to the back surface of the pad portion 31. The pad portion 31 is attached in a state in which the pad portion 31 can be rotated and tilted in various directions by a universal joint 43 such as a ball joint. The rotation of the support column 40 and the first arm 41 and the rotation of the first arm 41 and the second arm 42 can be simultaneously fixed by a first lock lever 46 provided on the first arm 41. You may make it fix each rotation part separately by the lock lever provided in each. The universal joint 43 that connects the second arm 42 and the pad connection member 44 can be fixed by a second lock lever 47. The connection and fixing form of the links of the pad support stand 32 are not limited to this form, but may be other forms such as providing a slide portion. The links may be fixed in other forms such as using a fastening screw. The crane operator's headrest 30 may be detachably attached to the stand 32.

  The stand 32 is arranged by using the space of the side of the seat back part 22 or the back side area of the seat back part 22. The holder 50 that holds the stand 32 is attached to the frame 51 using a frame 51 as a base in the armrest 24 of the seat 2. That is, one end of the support arm 52 is fixed to the frame 51 of the armrest 24, and the other end side of the support arm 52 is extended to the side of the seat back portion 22 or the back side region of the seat back portion 22. A receiving portion 53 that receives the support column 40 of the stand 32 and supports the stand 32 is provided at the extended end of the support arm 52. The receiving portion 53 has a receiving hole 54, and the column 40 is inserted into the receiving hole 54, and is fixed to the receiving portion 53 by a fastening screw 55 with a knob as a fixture. The cross-sectional shape of the support column 40 is an irregular outer shape that is not a perfect circle, for example, a quadrangle. The receiving hole 54 is formed according to the outer peripheral shape of the support column 40. Therefore, the support column 40 is inserted into the receiving hole 54 so as not to rotate around the axis. The insertion position at which the support column 40 is inserted into the receiving portion 53 can be freely selected, and the height of the pad portion 31 can be adjusted. The receiving part 53 is provided with a fastening screw 55 with a knob as a fixing tool for fixing the column 40 inserted into the receiving hole 54 so that the column 40 can be fixed to the receiving part 53 at an arbitrary position.

  As shown in FIG. 1, the traveling driver's headrest 25 is attached to the upper portion of the seat back portion 22 so as to rise substantially vertically during traveling operation. The traveling driver's headrest 25 rises substantially vertically from the upper portion of the seat back portion 22 and is adapted to the position of the head in the traveling driver's posture when looking at the front of the vehicle.

  When crane work is performed on site, the traveling driver's headrest 25 is first pulled out of the seat back portion 22. As shown in FIG. 2, the upper region of the seat back portion 22 is opened. Then, the column support 40 of the pad support stand 32 that has been removed in advance is inserted into the receiving hole 54 of the holder 50 of the cab seat 2, and the pad support stand 32 is assembled to the cab seat 2. Then, the position and orientation of the crane operator headrest 30 are determined by adjusting the link of the pad support stand 32.

  During crane operation, the boom is extended to a high place such as a building and cargo handling work is performed, so as shown in Fig. 2, the crane operator looks up at the high place and tilts his head back and sleeps upward. The crane operator's headrest 30 is installed according to the position of the head. Therefore, the crane operator can work easily looking up at high places with a reasonable posture, and there is little fatigue. Moreover, since the position of the crane operator's headrest 30 can be adjusted in accordance with the helmet worn on the crane operator's head, the crane operator's headrest 30 can be positioned at an optimum position, and the usability is improved. In addition, the crane operator's headrest 30 can be installed so as to contact the neck of the crane operator instead of the helmet. In this case, the head of the crane operator can support the neck and the head of the crane operator can be moved freely, so monitoring work looking up at a high place becomes easy.

  In particular, when the crane operator's headrest 30 is held by the stand 32 as compared with the case where only the traveling driver's headrest is provided, the traveling driver's headrest is removed so that it does not get in the way, as in the conventional case. In addition, the crane operator does not work in an upward posture in which the upper body sits away from the seat back to avoid the headrest for the traveling driver, and the upper body is tilted forward and the head is largely tilted backward. Therefore, there is little fatigue, and particularly fatigue of the neck is significantly reduced.

  In addition, when the crane operation is finished and the traveling operation is started, the traveling driver's headrest 25 is attached to the upper portion of the seat back portion 22. In this case, if the stand 32 can be removed from the cab seat 2, the crane operator's headrest 30 and the stand 32 can be detached from the cab seat 2. For this reason, the crane operator's headrest 30 and stand 32 do not interfere with driving and visibility. The crane operator's headrest 30 and stand 32 can be placed in the space behind the cab seat 2.

  In the above-described embodiment, the holder 50 is attached to the frame 51 using the frame 51 as a base in the armrest 24 of the seat 2, but below the frame of the seat cushion portion 21 and the seat back portion 22. You may make it attach to it using the flame | frame in a site | part (lower back part), the frame in the reclining mechanism 23, etc. FIG. You may make it attach a support mechanism to the ceiling part, side wall part, or floor part of a cab. Since the support mechanism can select the position of the headrest for the crane operator, the headrest for the crane operator can be used as the headrest for the traveling operator. In this case, a separate headrest for the driving driver may not be prepared. The position of the crane operator headrest may be selected by moving the support mechanism electrically.

BRIEF DESCRIPTION OF THE DRAWINGS Schematic explanatory drawing which looked at the cab from the side at the time of driving | running | working driving | running | working of the self-propelled crane which concerns on embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS Schematic explanatory drawing which looked at the cab in the crane operation | work of the self-propelled crane which concerns on embodiment of this invention from the side. The perspective view which shows the headrest for crane work of the self-propelled crane which concerns on embodiment of this invention, and the mount which supports the headrest for crane work.

Explanation of symbols

1 ... cab, 2 ... seat, 3 ... front window, 4 ... skylight,
21 ... Seat cushion part, 22 ... Seat back part, 24 ... Armrest,
25 ... Headrest for traveling driver, 30 ... Headrest for crane operator,
31 ... Pad part, 32 ... Pad support stand, 51 ... Frame.

Claims (1)

A seat provided in the cab of the self-propelled crane;
A headrest for a traveling driver that is detachably attached to a seat back of the seat;
A crane operator headrest that is provided separately from the headrest for the traveling driver and is installed in the upper rear region of the seat back so that the position can be selected.
A support mechanism provided in the cab and movably supporting the crane operator's headrest;
A cab seat for a self-propelled crane, comprising:

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