JP5874650B2 - Wheel crane - Google Patents

Description

  The present invention relates to a wheel crane as a construction machine, and more particularly to a side fender provided between a front wheel and a rear wheel of a lower traveling body and a structure around the side fender.

  Conventionally, as disclosed in, for example, Patent Document 1, as a wheel crane, a lower traveling body (also referred to as a carrier) having a front wheel and a rear wheel, and an upper revolving body mounted on the lower traveling body in a freely swingable manner, The thing provided with the cab and the telescopic boom provided in this upper revolving structure is known.

  In such a lower traveling body of a wheel crane, an outrigger device is provided at a front position of the front wheel and a rear position of the rear wheel, and a side fender is attached between the front wheel and the rear wheel. This side fender is intended to prevent people around the vehicle and light vehicles from getting involved during travel, and to protect tanks and equipment arranged inside, but is also disclosed in Patent Document 2. As shown, a plurality of step portions are provided at predetermined intervals in the vertical direction on the side fender so as to have a step function that makes it easy to get on and off the cab.

  Further, in such a lower traveling body of the wheel crane, for example, as disclosed in Patent Document 3, a floor plate storage portion for storing a floor plate for receiving the float of the outrigger device is provided at a rear position of the rear wheel. Some are known.

Japanese Patent Laid-Open No. 9-220979 (page 2-3, FIG. 2) JP 2001-71815 A (2nd page, FIG. 6, FIG. 7) JP 2008-19007 A

  By the way, the floorboard storage section is relatively small enough to store the floorboard, and cannot store anything other than the floorboard, such as a cone for preventing entry. For this reason, there is a strong demand from users for the installation of a storage room that can store not only the floorboard but also a cone for preventing entry.

  The present invention has been made in view of the above points, and the object of the present invention is to pay special attention to an empty space inside the side fender provided between the front wheel and the rear wheel of the lower traveling body, and the side fender. A wheel crane that can be used to store access-free cones, etc., without impairing the original functions and step functions of the machine, and can effectively improve convenience according to user needs. It is to be provided.

In order to solve the above-mentioned problem, the invention according to claim 1 is a wheel crane in which an upper swing body is turnably mounted on a lower traveling body having a front wheel and a rear wheel, and a cab is provided on the upper swing body. A storage chamber is provided inside the side fender between the front wheel and the rear wheel of the lower traveling body, and the side fender is provided with a plurality of step portions at predetermined intervals in the vertical direction and corresponds to the storage chamber. An opening / closing port is provided, and an opening / closing door constituting a part of the side fender is attached to the opening / closing port so as to be freely opened and closed.

  In this configuration, when the open / close door attached to the entrance / exit of the side fender is opened, entry / exit of the entry prohibition cone, the floorboard, and the like can be easily performed with respect to the storage chamber inside the side fender through the entrance / exit.

  On the other hand, when the door is closed, the side fender entrance is closed by the door, so the strength of the side fender does not become a problem. The function of preventing people and light vehicles from being caught and protecting tanks and equipment arranged inside can be sufficiently exhibited. In addition, the side fender is provided with a plurality of step parts at predetermined intervals in the vertical direction, so it is possible to easily get on and off the cab using this step part, and to fully demonstrate the step function can do.

In the invention according to claim 1 , in addition to the configuration described above, the plurality of step portions are provided so as to extend over substantially the entire length of the side fender in the front-rear direction, and a part of the plurality of step portions is provided as described above. A part corresponding to the storage chamber is separated into a part corresponding to the storage chamber, and a part corresponding to the storage chamber is provided with a hinge on one end side and a lock mechanism on the other end side to constitute the opening / closing door. .

  In this configuration, since the plurality of step portions provided on the side fenders are provided to extend over substantially the entire length of the side fender in the front-rear direction, the step portions are used from any position in the front-rear direction of the side fender. Thus, it is possible to easily get on and off the cab, and to further enhance the step function. Further, a part of the plurality of step portions constitutes an opening / closing door in which a portion corresponding to the storage chamber opens and closes the entrance / exit, but both ends of the portion corresponding to the storage chamber are closed when the opening / closing door is closed. Are fixed to the storage chamber side as the hinge side or the lock mechanism side, respectively, so that the step function can be stably exhibited even when the step portion is used in a portion corresponding to the storage chamber.

According to a second aspect of the present invention, in the wheel crane according to the first aspect , among the plurality of step portions, at least two step portions adjacent to each other in the vertical direction and corresponding portions to the storage chambers, The rectangular frame-shaped opening / closing door is formed integrally with the portions connecting the front and rear ends of the rectangular frame-shaped opening / closing door. Of the two opposite sides of the rectangular frame-shaped opening / closing door, a hinge is provided on one side, and the other The latch of the lock mechanism is provided on each side.

  In this configuration, the strength of the door itself increases, and the stability of the step portion particularly when the door is closed is higher than when the hinge and the lock mechanism are provided separately for each step portion. Therefore, the step function can be exhibited with better stability. In addition, the rectangular frame-shaped open / close door is supported so that it can be opened and closed via a hinge on one side, and its support strength is high, so when the lock mechanism latch is operated when the open / close door is closed, its operation Is done smoothly and reliably.

The invention according to claim 3 is the same as the invention according to claim 1, in which the upper swing body is turnably mounted on the lower traveling body having the front wheels and the rear wheels, and the cab is provided on the upper swing body. In the above, a storage chamber is provided inside the side fender between the front wheel and the rear wheel of the lower traveling body, and the side fender is provided with a plurality of step portions at predetermined intervals in the vertical direction and corresponds to the storage chamber. Thus, a loading / unloading port is provided, and an opening / closing door constituting a part of the side fender is attached to the loading / unloading port so as to be freely opened and closed. In addition to this configuration, a holding member that holds a floor plate for receiving the float of the outrigger device in a horizontal state is provided outside the bottom of the storage chamber, and the holding member has a hinge on one side near the back of the storage chamber. A lock mechanism is provided on each side of the front side of the storage chamber, and when the lock state by the lock mechanism is released, the holding member rotates around the hinge so that the side of the front side of the storage chamber comes into contact with the ground. To do.

In this configuration, since the floor plate for receiving the float of the outrigger device is held in a horizontal state by the holding member provided outside the bottom portion of the storage chamber, the storage chamber is used as a storage space for other objects such as an entry prohibition cone. be able to. In addition, the holding member pivots around the hinge when the locked state by the locking mechanism is released so that one side of the holding member on the front side of the storage chamber comes into contact with the ground. without that, the loading and unloading of the floor plate relative to the holding member can be easily performed.

The invention according to claim 4 is the same as the invention according to claim 1, wherein the upper swing body is turnably mounted on the lower traveling body having the front wheels and the rear wheels, and the cab is provided on the upper swing body. In the above, a storage chamber is provided inside the side fender between the front wheel and the rear wheel of the lower traveling body, and the side fender is provided with a plurality of step portions at predetermined intervals in the vertical direction and corresponds to the storage chamber. Thus, a loading / unloading port is provided, and an opening / closing door constituting a part of the side fender is attached to the loading / unloading port so as to be freely opened and closed. In addition to this configuration, the open / close door is provided with a hinge on the lower end side and a lock mechanism on the upper end side with the access port closed, and receives the float of the outrigger device on the inner surface side of the open / close door. A holding part that holds the floor plate in a vertical state along the inner surface of the open / close door is provided, and when the open / close door is opened, the open / close door rotates around the hinge so that the lock mechanism side end of the open / close door contacts the ground To do.

In this configuration, since the floor plate for receiving the float of the outrigger device is held in a vertical state along the inner surface of the door by the holding portion provided on the inner surface side of the door, the storage chamber is not occupied by the floor plate. The storage room can be used as a storage space for other objects such as a restricted entry cone. Moreover, since the open-lock mechanism end of the door opening and closing door is rotated in the hinge around the time of the door is in contact with the ground, without Ru lift the soleplate is heavy, the door The floorboard can be easily put in and out of the holding part on the inner surface side.

The invention according to claim 5 provides the wheel crane according to claim 3 or 4, wherein the caster is provided with a caster that is urged by a spring so as to protrude from the lower surface of the siding plate and float the siding plate when only the weight of the siding plate is loaded. Make the configuration.

  In this configuration, since the casters are provided on the base plate, there is no need to lift the base plate when the base plate is taken in and out of the holding member or the holding part and when the base plate is moved to the installation position of the base plate. Become a thing. In addition, since the caster is biased by a spring so as to protrude from the bottom surface of the siding plate and lift the siding plate when it is loaded with its own weight, when the slat is used to receive the float of the outrigger device, This usage will not be hindered or the caster will not be damaged.

  As described above, according to the wheel crane of the present invention, when the open / close door attached to the entrance / exit of the side fender is opened, the entrance / exit cone, the floorboard, etc. are taken in / out of the storage room inside the side fender through the entrance / exit. It can be performed easily and the convenience according to the user's needs can be improved. Moreover, when the door is closed, the entrance and exit of the side fender is closed by the door, so the strength of the side fender does not become a problem, and the original function and step function of the side fender are fully demonstrated. This is effective for implementation.

In particular, in the invention according to claim 1 , since the plurality of step portions provided on the side fender are provided to extend over substantially the entire length in the front-rear direction of the side fender, any position in the front-rear direction of the side fender is provided. Even from the cab, it is possible to easily get on and off the cab using the step portion, and the step function can be further enhanced. Further, a part of the plurality of step portions constitutes an opening / closing door in which a portion corresponding to the storage chamber opens and closes the entrance / exit, but both ends of the portion corresponding to the storage chamber are closed when the opening / closing door is closed. Are fixed to the storage chamber side as the hinge side or the lock mechanism side, respectively, so that the step function can be stably exhibited even when the step portion is used in a portion corresponding to the storage chamber.

In the invention according to claim 2 , the strength of the opening / closing door itself is increased, and the stability of the step portion when the opening / closing door is closed as compared with the case where the hinge and the lock mechanism are separately provided for each step portion. Therefore, the step function can be exhibited with better stability. In addition, the rectangular frame-shaped open / close door is supported so that it can be opened and closed via a hinge on one side, and its support strength is high, so when the lock mechanism latch is operated when the open / close door is closed, its operation Is smoothly and reliably performed, which can contribute to an improvement in reliability.

In the invention according to claim 3 , since the floor plate for receiving the float of the outrigger device is held in a horizontal state by the holding member provided outside the bottom portion of the storage chamber, the storage chamber is used for storing other objects such as a cone for preventing entry. It can be used as a space. In addition, the holding member pivots around the hinge when the locked state by the lock mechanism is released, so that one side of the holding member on the front side of the storage chamber comes into contact with the ground. Therefore, it is possible to easily insert and remove the floor plate with respect to the holding member, and it is possible to contribute to improvement of work efficiency and reduction of the burden on the operator.

In the invention according to claim 4 , since the floor plate for receiving the float of the outrigger device is held in a vertical state along the inner surface of the door by the holding portion provided on the inner surface side of the door, the storage chamber is occupied by the floor plate. The storage room can be used as a storage space for other objects such as a no entry cone. In addition, when the opening / closing door is opened, the opening / closing door rotates around the hinge so that the lock mechanism side end of the opening / closing door comes into contact with the ground. It is possible to easily put in and out the floor plate with respect to the holding unit on the side, and it is possible to contribute to improvement of work efficiency and reduction of the burden on the worker.

Furthermore, in the invention according to claim 5 , since the caster is provided on the floor plate, when the floor plate is taken in and out of the holding member or the holding portion and when it is transported to the installation position of the floor plate, there is no need to lift the floor plate at all. Accordingly, the work can be facilitated. In addition, since the caster is biased by a spring so as to protrude from the bottom surface of the siding plate and lift the siding plate when it is loaded with its own weight, when the slat is used to receive the float of the outrigger device, There is no hindrance to this mode of use and the caster is not damaged, which is advantageous for implementation.

FIG. 1 is a side view of a wheel crane according to a first embodiment of the present invention. FIG. 2 is an enlarged view of the vicinity of the side fender of FIG. FIG. 3 is an enlarged cross-sectional view taken along line XX in FIG. FIG. 4 is an enlarged cross-sectional view taken along line YY of FIG. 5A is an arrow view seen from the Z direction in FIG. 3, and FIG. 5B is a cross-sectional view taken along line EE in FIG. 5A. FIG. 6 is a view corresponding to FIG. 1 showing a second embodiment of the present invention. FIG. 7 is an enlarged view of the vicinity of the side fender of FIG. FIG. 8 is an enlarged sectional view taken along line FF in FIG. 9 is an enlarged cross-sectional view taken along line GG in FIG. 10A is an arrow view seen from the H direction of FIG. 8, and FIG. 10B is a cross-sectional view taken along the line II of FIG. 10A. FIG. 11 is a view corresponding to FIG. 1 showing a third embodiment of the present invention. FIG. 12 is an enlarged view of the vicinity of the side fender of FIG. 13 is a cross-sectional view taken along line JJ in FIG. FIG. 14 shows a floor board, (a) is a plan view, and (b) is a side view. FIG. 15 is an enlarged view of the vicinity of K in FIG. 16 is a cross-sectional view taken along line MM in FIG. FIG. 17 is a view corresponding to FIG. 1, showing a fourth embodiment of the present invention. FIG. 18 is an enlarged view of the vicinity of the side fender of FIG. FIG. 19 is a sectional view taken along line NN in FIG. 20A is an arrow view seen from the R direction in FIG. 19, and FIG. 20B is a cross-sectional view taken along the line S-S in FIG. 21 is an enlarged cross-sectional view taken along line QQ in FIG. FIG. 22 shows a floor board, (a) is a plan view, and (b) is a side view.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments that are modes for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 shows a wheel crane A according to a first embodiment of the present invention. The wheel crane A includes a lower traveling body 3 having a front wheel 1 and a rear wheel 2 each on the left and right, and the lower traveling body. 3 is provided with an upper revolving body 5 that is pivotably mounted on 3 with a swivel bearing 4 interposed therebetween.

  The upper swing body 5 is provided with a cab 6 that constitutes a driver's cab, and a telescopic boom 7 that can be expanded and contracted in a plurality of stages. The telescopic boom 7 is provided so as to be raised and lowered around a boom foot pin which is a support point on the base end side by a raising and lowering cylinder (not shown). A boom head 8 is attached to the tip of the telescopic boom 7, and crane work is performed by a hanging hook 9 suspended from the boom head 8.

  A total of four outrigger devices 11, 11,... Are respectively provided at a front position of the front wheel 1 and a rear position of the rear wheel 2 of the lower traveling body 3. Each outrigger device 11 is not shown in detail in the figure, but a float is attached to the tip of the telescopic beam, and when the crane is operated, the telescopic beam is extended and tilted toward the ground to ground the float to the ground. And the rear wheel 2 is made to float from the ground.

  Further, a side fender 12 is provided between the front wheel 1 and the rear wheel 2 of the lower traveling body 3 so as to constitute the outer surface of the lower traveling body 3. This is to prevent the surrounding people and light vehicles from being involved and to protect the device 21 (see FIG. 3) disposed inside.

  As shown in FIGS. 2 and 3, the side fender 12 has an upper edge portion via an upper bracket 15 and a lower edge portion with respect to a carrier frame 14 that is a strength member of the lower traveling body 3, and a lower bracket 16 as a lower edge portion. It is attached through each. Further, the front edge portion, the intermediate portion, and the rear edge portion of the side fender 12 are respectively connected to the front vertical member 17, the intermediate vertical member 18, and the rear vertical member 19 that are respectively installed between the upper bracket 15 and the lower bracket 16. It is fixed. In a space surrounded by the inside of the side fender 12 and the carrier frame 14, a travel-related device 21 such as an air tank or a pipe is arranged. However, the empty space, specifically the front vertical member 17 to the intermediate vertical member, is arranged. In the space up to the vicinity of the rear of 18, a storage chamber 24 is provided for storing objects such as an entry prohibition cone 23 by laying a bottom plate 22 on the lower bracket 16.

  The side fender 12 is provided with four step portions 25, 26, 27, and 28 at predetermined intervals in the vertical direction, and an inlet / outlet port 29 corresponding to the storage chamber 24 is provided. A rectangular frame-shaped opening / closing door 30 is attached to 29 so as to be freely opened and closed.

  The four step portions 25 to 28 are formed in a U-shaped or rectangular frame shape by joining a reinforcing plate to the side fender 12, and all of these step portions 25 to 28 are side fenders 12. And extending over substantially the entire length in the front-rear direction. Of the four step portions 25 to 28, the two intermediate step portions 26 and 27 both correspond to the storage chamber 24 and have front portions 26 a and 27 a before the intermediate vertical member 18, and the intermediate vertical member 18. It is separated into the rear portions 26b and 27b. The front portions 26a and 27a are integrally formed with the portions connecting the front and rear ends thereof to constitute the rectangular frame-shaped opening / closing door 30.

  Among the two short sides facing each other of the rectangular frame-shaped opening / closing door 30, hinges 31 as shown in detail in FIG. The opening / closing door 30 is attached to the front vertical member 17 so as to be capable of opening and closing around the vertical axis. On the other hand, a lock mechanism 32 for locking the open / close door 30 in the closed state is provided on the rear short side. As shown in detail in FIGS. 4 and 5, the lock mechanism 32 is provided at the upper position on the inner surface side (rear surface side) of the opening / closing door 30 so as to be able to protrude and retract in the horizontal direction, and in the state of protruding backward, A first latch 34 that engages a plate 33 provided on the member 18 and a lower position on the inner surface side of the opening / closing door 30 are provided so as to be able to protrude and retract in the vertical direction, and provided on the intermediate vertical member 18 in a state of protruding downward. The second latch 36 that engages with the plate 35 is attached to the upper position on the outer surface side (front surface side) of the open / close door 30 and interlocks with both the latches 34 and 36 via a link 37, a connecting rod 38, and the like. The operation handle 39 is provided. When the door 30 is closed, the latches 34 and 36 are engaged with the plates 33 and 35 to lock the door 30 in the closed state. When the operation handle 39 is operated, both the latches 34 and 36 are immersed. The door 30 is unlocked by moving in the direction.

  As clearly shown in FIG. 5A, the front end portions of the rear portions 26b and 27b of the intermediate two step portions 26 and 27 are both fixed to the intermediate portion vertical member 18 by bolting. Further, in FIG. 4, reference numerals 41 and 42 denote a stopper and a stopper receiver for restricting the rotational position when the opening / closing door 30 is opened.

  Next, the operational effect of the wheel crane A will be described. When the object such as the entry prohibition cone 23 is taken in and out of the storage chamber 24 provided inside the side fender 12 of the lower traveling body 3, the side fender 12 is taken in and out. When the opening / closing door 30 attached to the opening 29 is opened, a loading / unloading opening 29 provided corresponding to the storage chamber 24 is opened widely, so that an object such as the entry prohibition cone 23 can be easily taken in / out through the loading / unloading opening 29. It is possible to improve convenience according to user needs.

  On the other hand, when the opening / closing door 30 is closed, since the entrance / exit 29 of the side fender 12 is closed by the opening / closing door 30, the strength of the side fender 12 does not become a problem, and the original function as the side fender 12 is achieved. In other words, it is possible to sufficiently exhibit the function of preventing the surrounding people and light vehicles from being involved during traveling and protecting the tank and the device 21 disposed inside. Further, since the side fender 12 is provided with four step portions 25 to 28 at predetermined intervals in the vertical direction, it is possible to easily get on and off the cab 6 using the step portions 25 to 28. The step function can be fully exhibited.

  In particular, in the case of the present embodiment, the four step portions 25 to 28 are provided so as to extend over substantially the entire length of the side fender 12 in the front-rear direction, so any position in the front-rear direction of the side fender 12 is provided. Even from the vehicle, it is possible to easily get on and off the cab 6 using the step portions 25 to 28, and the step function can be further enhanced. Further, the middle two step portions 26 and 27 among the four step portions 25 to 28 constitute an opening / closing door 30 in which the front side portions 26 a and 27 a corresponding to the storage chamber 24 open and close the opening / closing port 29. However, when the door 30 is closed, the front and rear ends of the front portions 26a and 27a are fixed to the front vertical member 17 or the intermediate vertical member 18 on the storage chamber 24 side via the hinge 31 or the lock mechanism 32, respectively. Therefore, even when the front portions 26a and 27a are used as steps, the step function can be stably exhibited.

  In addition, the front side portions 26a and 27a of the two intermediate step portions 26 and 27 are integrally formed with the portions connecting the front and rear ends thereof to constitute a rectangular frame-shaped opening / closing door 30. Therefore, the strength of the opening / closing door 30 itself is increased, and the opening / closing door is particularly compared with a case where a hinge and a lock mechanism are separately provided for each of the step portions 26 and 27 (specifically, the front portions 26a and 27a). The stability of the step portions 26 and 27 at the time of closing 30 is increased, and the step function can be exhibited with better stability. In addition, the rectangular frame-shaped opening / closing door 30 is supported at two locations on the short side of the front side so as to be capable of opening and closing via hinges 31 and has a high supporting strength. Therefore, when the opening / closing door 30 is closed, When the two latches 34 and 36 of the lock mechanism 32 are operated, the operation is smoothly and surely performed, which can contribute to improvement of reliability.

  Further, when the wheel crane A is traveling, the rectangular frame-shaped opening / closing door 30 is fixed to the front vertical member 17 on the storage chamber 24 side via the hinges 31 at the two short sides on the front side, and Since the two short sides are fixed to the intermediate vertical member 18 on the side of the storage chamber 24 via the latches 34 and 36 of the lock mechanism 32, respectively, it is assumed that the two latches 34 and 36 are detached during traveling. However, the open / close door 30 tends to be closed by the traveling wind and does not open greatly, and the safety can be improved accordingly.

  FIG. 6 shows a wheel crane B according to the second embodiment of the present invention. The configuration of the wheel crane B is basically the same as that of the wheel crane A according to the first embodiment, and the same members are denoted by the same reference numerals and the description thereof is omitted. The difference between the two is that, in the case of the wheel crane A according to the first embodiment, the rectangular frame-shaped opening / closing door 30 is attached to the side fender 12 so as to be capable of opening and closing around the vertical axis. In the case of the wheel crane B according to the embodiment, the rectangular frame-shaped opening / closing door 30 is attached to the side fender 12 so as to be capable of opening and closing around the horizontal axis. Hereinafter, this configuration will be described with reference to FIGS.

  That is, as shown in FIG. 7 to FIG. 9, hinges 51 are respectively provided at two left and right positions of the upper long side among the two long sides facing each other of the rectangular frame-shaped opening / closing door 30. Is supported by a support member 52 installed between the front vertical member 17 and the intermediate vertical member 18, so that the opening / closing door 30 is pivoted around the horizontal axis by the hinge 51 and the support member 52. Supported as possible. On the other hand, a lock mechanism 53 for locking the open / close door 30 in the closed state is provided on the lower long side of the open / close door 30. As shown in detail in FIG. 10, the lock mechanism 53 is provided at the front position on the inner surface side (back surface side) of the opening / closing door 30 so as to be able to appear and retract in the horizontal direction, and in a state of protruding forward, the front vertical member 17. And a second latch 57 which is provided in the rear position on the inner surface side of the opening / closing door 30 so as to be able to protrude and retract in the horizontal direction and engages with the intermediate vertical member 18 in a state of protruding rearward. And an operation handle 60 that is attached to an intermediate position on the outer surface side (front surface side) of the open / close door 30 and is provided so as to interlock with both the latches 55 and 57 via a link 58, a connecting rod 59, and the like. Yes. When the door 30 is closed, the latches 55 and 57 engage with the vertical members 17 and 18 to lock the door 30 in the closed state. When the operation handle 60 is operated, the latches 55 and 57 are moved. The door 30 is unlocked by moving in the immersion direction.

  In FIG. 9, reference numerals 61 and 62 denote a stopper and a stopper receiver for restricting the rotational position when the opening / closing door 30 is opened. Further, the configuration of the side fender 12 and the storage chamber 24 provided inside thereof is the same as that in the first embodiment, and the same members are denoted by the same reference numerals and description thereof is omitted.

  Also in the second embodiment, as in the case of the first embodiment, things such as the entry prohibition cone 23 are taken in and out of the storage chamber 24 provided inside the side fender 12 of the lower traveling body 3. Sometimes, when the opening / closing door 30 attached to the entrance / exit 29 of the side fender 12 is opened, the entrance / exit 29 provided corresponding to the storage chamber 24 is opened widely. It goes without saying that the effects of being able to easily take in and out are obtained.

  In particular, in the case of the second embodiment, when the rectangular frame-shaped opening / closing door 30 is attached to the loading / unloading port 29 of the side fender 12 so as to be capable of opening and closing around the horizontal axis, the rectangular frame-shaped opening / closing doors 30 face each other. Of the two long sides, the hinges 51 and 51 are provided at two locations on the upper long side, and the latches 55 and 57 of the lock mechanism 53 are provided at two locations on the lower long side. Even if the latches 55 and 57 of the lock mechanism 53 are disengaged, the open / close door 30 is not opened by its own weight, and the safety can be improved accordingly.

  FIG. 11 shows a wheel crane C according to a third embodiment of the present invention. In addition to the configuration of the wheel crane B according to the second embodiment, the wheel crane C includes a bottom portion (lower bracket) of the storage chamber 24 provided inside the side fender 12 as shown in detail in FIGS. 16 and the bottom plate 22) Two holding members 72, 72 for holding the floor plate 71 for receiving the float of the outrigger device 11 in a horizontal state are provided side by side as viewed from the side of the wheel crane C.

  The holding member 72 is a substantially square thin plate corresponding to the floor plate 71 (see FIG. 14), and a hinge 73 is provided on one side of the holding member 72 near the storage chamber 24. A holding member 72 is attached to the lower bracket 16 so as to be rotatable about a horizontal axis. On the other hand, a latch engaging portion 75 of a lock mechanism 74 for supporting the holding member 72 is provided on one side of the holding member 72 in front of the storage chamber 24. The lock mechanism 74 is swingably provided outside the latch engaging portion 75 and at the lower portion on the back surface side of the side fender 12. The latch 76 engageable with the latch engaging portion 75 and the lower portion on the outer surface side of the side fender 12. And an operation handle 77 for swinging the latch 76. When the operating handle 77 is operated from the locked state in which the latch 76 of the locking mechanism 74 is engaged with the latch engaging portion 75 and supports the holding member 72, the latch 76 releases the engagement with the latch engaging portion 75. And the locked state is released. Further, when the lock state by the lock mechanism 74 is released, the holding member 72 rotates around the hinge 73 so that one side of the holding member 72 on the front side of the storage chamber is in contact with the ground.

  On the other hand, as shown in FIG. 14, the floor plate 71 is made of a substantially square steel plate having a predetermined thickness, and handling handles 81 are respectively attached to the center portions of two opposite sides of the floor plate 71. In addition, casters 82 are provided at the four corners of the floor plate 71, respectively. As shown in detail in FIGS. 15 and 16, the caster 82 includes a pair of rollers 83 and 83, and a roller support member 84 having a support shaft 84a that rotatably supports the pair of rollers 83 and 83. A spring case 85 fixed to the floor plate 71 in a state of surrounding the outer periphery of the vertical rod portion 84b of the roller support member 84; and a roller case 85 disposed in the spring case 85 and on the outer periphery of the vertical rod portion 84b of the roller support member 84; A coil spring 87 mounted in a compressed state between the flange member 86 mounted on the vertical rod portion 84b of the support member 84 and the top plate portion 85a of the spring case 85, and a roller support penetrating the top plate portion 85a of the spring case 85 An adjustment nut 88 screwed into a screw portion 84c formed on the upper outer periphery of the vertical rod portion 84b of the member 84, and the weight of the floor plate 71 During the load roller 83 from the lower surface of the sole plate 71 is adapted to float the floor plate 71 to protrude.

  In addition, the other structure of the wheel crane C is the same as the case of the wheel crane B which concerns on 2nd Embodiment, The same code | symbol is attached | subjected to the same member and the description is abbreviate | omitted.

  And in the said 3rd Embodiment, in addition to the effect similar to the case of 2nd Embodiment, there can also exist the following effects.

  That is, the floor plate 71 for receiving the float of the outrigger device 11 is held in a horizontal state by the holding member 72 provided outside the bottom portion of the storage chamber 24, so that the inside of the storage chamber 24 is free of other objects such as the entry prohibition cone 23. It can be used effectively as a storage space, and the convenience for the user can be further improved accordingly.

Further, the holding member 72 rotates around the hinge 73 when the locked state by the lock mechanism 74 is released by the operation handle 77 so that one side of the holding member 72 on the front side of the storage chamber comes into contact with the ground. without Ru lifting the floor plate 71 which is a heavy object, loading and unloading of the floor plate 71 with respect to the holding member 72 can be easily performed.

  Further, since the casters 82 are provided at the four corners of the floor plate 71, there is no need to lift the floor plate 71 when the floor plate 71 is taken in and out of the holding member 72 and when it is transported to the installation position of the floor plate 71. Accordingly, the work can be facilitated. Moreover, since the caster 82 is urged by the coil spring 87 so that the roller 83 protrudes from the lower surface of the floor plate 71 and floats the floor plate 71 when only the dead weight of the floor plate 71 is loaded, the caster 82 floats the outrigger device 11 during crane work. When the laying plate 71 is used so as to receive it, the caster 82 does not interfere with this use mode, or the caster 82 is not damaged, and the implementation can be facilitated.

  FIG. 17 shows a wheel crane D according to the fourth embodiment of the present invention. The configuration of the wheel crane D is basically the same as that of the wheel crane A according to the first embodiment, and the same members are denoted by the same reference numerals and description thereof is omitted. The difference is that the configuration of the side fender 90 provided between the front wheel 1 and the rear wheel 2 of the lower traveling body 3 and the storage chamber provided inside thereof is different.

  That is, as shown in FIGS. 18 and 19, the side fender 90 is divided into a first side fender 91, a second side fender 92, and a third side fender 93 in order from the front side. The side fender 91 has an upper edge portion on the upper bracket 15, a lower edge portion on the lower bracket 16, a front edge portion on the front vertical member 94, and a rear edge portion on the first intermediate vertical member 95, respectively. It is fixed. The inside of the side fender 90 is for preventing entry by laying a bottom plate (not shown) between at least the first intermediate vertical member 95, the second intermediate vertical member 96, and the rear vertical member 97. A storage chamber 98 is provided for storing objects such as a cone (not shown).

  The first side fender 91 is provided with three step portions 101, 101, 101 at predetermined intervals in the vertical direction. Each step portion 101 is not shown, but the first side fender 91 is not shown. A reinforcing plate is joined to 91 and the cross-sectional shape is formed in a U shape or a rectangular frame shape.

  The storage chamber 98 is opened to the outside through the side and the two outlets 102 and 103 partitioned by the second intermediate vertical member 96 as viewed from the side of the wheel crane D. 103, two open / close doors 104 and 105, each having the second side fender 92 and the third side fender 93 as outer plates, are attached to be openable and closable.

  Each of the open / close doors 104 and 105 is provided with hinges 106 at two positions on the lower end side of the doors 102 and 103 closed, and the lower bracket 16 is opened and closed around the horizontal axis via the hinges 106. It is mounted movably. On the other hand, a lock mechanism 107 for locking the open / close doors 104, 105 in the closed state is provided on the upper end side of the open / close doors 104, 105. As shown in detail in FIG. 20, the lock mechanism 107 is provided at the front position on the inner surface side (back surface side) of the open / close doors 104 and 105 so as to be able to protrude and retract in the horizontal direction, and protrudes forward in the first state. The first latch 108 engaged with the intermediate vertical member 95 or the second intermediate vertical member 96 and the rear portion of the inner surface side of the open / close doors 104 and 105 are provided so as to be able to appear in the horizontal direction and protrude rearward. The second latch 109 that engages with the second intermediate vertical member 96 or the rear vertical member 97 in the state and an intermediate position on the outer surface side (front surface side) of the open / close doors 104 and 105, 109 is provided with an operation handle 112 provided so as to be interlocked via a link 110, a connecting rod 111, and the like. When the open / close doors 104 and 105 are closed, the latches 108 and 109 engage with the vertical members 95 and 96 or 96 and 97, respectively, to lock the open / close doors 104 and 105 and close the operation handle 112. Then, both the latches 108 and 109 move in the immersion direction, the locks of the doors 104 and 105 are released, and the doors 104 and 105 rotate around the hinge 106 so that the end portions of the doors 104 and 105 on the lock mechanism side. Comes in contact with the ground.

  On the inner surface side of each of the doors 104 and 105, as shown in FIG. 19, a holding portion 114 that holds a floor plate 113 for receiving the float of the outrigger device 11 in a vertical state along the inner surfaces of the doors 104 and 105. Is provided. The holding portion 114 is made of a rectangular thin plate, the vertical dimension is set smaller than the length of one side of the floor plate 113, and the horizontal dimension is set slightly larger than the length of one side of the floor plate 113. . Further, as shown in FIG. 21, both end portions in the width direction of the holding portion 114 are bent in a U-shaped cross section so as to restrain the end portion of the floor plate 113, and the lower end portion of the holding portion 114 is It is bent inward in a L-shaped cross section so as to receive the floor plate 113.

  On the other hand, as shown in FIG. 22, the floor plate 113 is made of a substantially square steel plate having a predetermined thickness, and handling handles 115 are attached to the center portions of the opposite sides of the floor plate 113, respectively. Yes.

  In the fourth embodiment, when the open / close doors 104 and 105 attached to the side of the side fender 90 and the two entrances 102 and 103 are opened, the inside of the side fender 90 is stored through the entrances 102 and 103. The entrance / exit cone and the like can be easily taken in and out of the room 98, and the convenience according to the needs of the user can be enhanced.

  On the other hand, when both the opening and closing doors 104 and 105 are closed, since the entrances 102 and 103 of the side fender 90 are closed by the opening and closing doors 104 and 105, the strength of the side fender 90 does not become a problem. The original function as the fender 90, that is, the function of preventing people around the vehicle, light vehicles, and the like from being involved during traveling and protecting the device 21 and the like disposed inside can be sufficiently exhibited. In addition, since the side fender 90 (specifically, the first side fender 91) is provided with three step portions 101, 101, 101 at predetermined intervals in the vertical direction, the cab 6 is utilized by using the step portion 101. It is possible to easily get on and off and to fully demonstrate the step function.

  In addition, since the floor plate 113 for receiving the float of the outrigger device 11 is held in a vertical state along the inner surfaces of the doors 104 and 105 by the holding portions 114 provided on the inner surfaces of the doors 104 and 105, The inside of the storage room 98 is not occupied by the floor plate 113, and the inside of the storage room 98 can be used as a storage space for other things such as a cone for prohibiting entry, and the convenience of the user can be further improved accordingly.

Further, when the operation mechanism 112 is used to release the locked state by the lock mechanism 107 when the doors 104 and 105 are opened, the doors 104 and 105 rotate around the hinge 106 so that the ends of the doors 104 and 105 on the lock mechanism side to become in contact with the ground, without Ru lifting the floor plate 113 is a heavy, loading and unloading of the floor plate 113 against the inner surface of the holding portion 114 of the door 104, 105 can be easily performed.

  The present invention is not limited to the first to fourth embodiments described above, but includes other various forms. For example, in each of the embodiments, the wheel cranes A to D in which the lower traveling body 3 includes the front wheel 1 and the rear wheel 2 each having one wheel on the left and right are described, but the present invention is not limited to this, and the front wheel or the rear wheel It can be widely applied to a wheel crane having a plurality of rows of wheels.

  Moreover, in the said 1st thru | or 3rd embodiment, all extend the step part 25-28 to the side fender 12 over the substantially full length of the front-back direction length of the side fender 12 for every predetermined space | interval to the up-down direction. Among the four step portions 25 to 28, the intermediate two step portions 26 and 27 are separated into the front portions 26a and 27b and the rear portions 26b and 27b, and the front portions 26a and 27a are separated from each other. The rectangular frame-shaped opening / closing door 30 is formed by integrally forming the front and rear both ends, but the present invention does not integrate the front portions 26a and 27a, and the front portions 26a and 27a. A hinge may be provided on one end side and a lock mechanism may be provided on the other end side, and the front and rear doors may be configured by both front side portions.

A, B, C, D Wheel crane 1 Front wheel 2 Rear wheel 3 Lower traveling body 5 Upper turning body 6 Cab 11 Outrigger device 12, 90 Side fender 24, 98 Storage chamber 25-28, 101 Step section 29, 102, 103 Mouth 30, 104, 105 Open / close door 26a, 27a Front part 26b, 27b Rear part 31, 51, 73, 106 Hinge 32, 53, 74, 107 Lock mechanism 34, 55, 108 First latch 36, 57, 109 Second latch 71, 113 Base plate 72 Holding member 82 Caster 87 Coil spring 114 Holding portion

Claims (5)

In a wheel crane in which an upper swing body is rotatably mounted on a lower traveling body having a front wheel and a rear wheel, and a cab is provided on the upper swing body,
A storage chamber is provided inside the side fender between the front and rear wheels of the lower traveling body, and the side fender is provided with a plurality of step portions at predetermined intervals in the vertical direction. In addition, an opening / closing port is provided corresponding to the storage chamber, and an opening / closing door constituting a part of the side fender is attached to the opening / closing port so as to be freely opened and closed .
The plurality of step portions are provided to extend over substantially the entire length of the side fender in the front-rear direction, and a part of the plurality of step portions includes a portion corresponding to the storage chamber and other portions. The wheel crane is characterized in that the portion corresponding to the storage chamber is provided with a hinge on one end side and a lock mechanism on the other end side to constitute the open / close door . Of the plurality of step portions , at least two step portions adjacent to each other in the vertical direction and the portions corresponding to the storage chambers are integrally formed with the portions connecting the front and rear ends thereof, and are rectangular frame-shaped. The two doors facing each other of the rectangular frame-shaped door are provided with a hinge on one side and a latch for a lock mechanism on the other side. Item 10. A wheel crane according to Item 1. In a wheel crane in which an upper swing body is rotatably mounted on a lower traveling body having a front wheel and a rear wheel, and a cab is provided on the upper swing body,
A storage chamber is provided inside the side fender between the front and rear wheels of the lower traveling body, and the side fender is provided with a plurality of step portions at predetermined intervals in the vertical direction. In addition, an opening / closing port is provided corresponding to the storage chamber, and an opening / closing door constituting a part of the side fender is attached to the opening / closing port so as to be freely opened and closed.
Outside the bottom of the storage chamber, there is provided a holding member that holds the floor plate for receiving the float of the outrigger device in a horizontal state. The holding member has a hinge on one side near the back of the storage chamber, and a front side of the storage chamber. A lock mechanism is provided on each side, and when the lock state by the lock mechanism is released, the holding member rotates around the hinge so that the one side of the holding member in front of the storage chamber is in contact with the ground. wheel crane to be. In a wheel crane in which an upper swing body is rotatably mounted on a lower traveling body having a front wheel and a rear wheel, and a cab is provided on the upper swing body,
A storage chamber is provided inside the side fender between the front and rear wheels of the lower traveling body, and the side fender is provided with a plurality of step portions at predetermined intervals in the vertical direction. In addition, an opening / closing port is provided corresponding to the storage chamber, and an opening / closing door constituting a part of the side fender is attached to the opening / closing port so as to be freely opened and closed.
The open / close door is provided with a hinge on the lower end side and a lock mechanism on the upper end side with the entrance / exit closed, and a floor plate for receiving the float of the outrigger device is provided on the inner surface side of the open / close door. A holding part that holds the door vertically is provided along the inner surface of the door, and when the door is opened, the door is turned around the hinge so that the lock mechanism side end of the door is in contact with the ground. A wheel crane characterized by . The wheel crane according to claim 3 or 4, wherein the floor plate is provided with a caster that is biased by a spring so as to protrude from the lower surface of the floor plate and lift the floor plate when a load of only the weight of the floor plate is applied .