JP5207624B2 - Self-propelled lifter device - Google Patents

Description

  The present invention relates to a lifter device that is used when loading and unloading loads (heavy objects), installation work of machines, and the like, and more particularly to a self-propelled lifter device that includes a traveling carriage at the lower part of a lifter body.

  15 and 16 show a truck mounted lifter device disclosed in Japanese Patent Laid-Open No. 2001-341980 (Patent Document 1). In this known truck-mounted lifter device, telescopic struts 11A and 11A comprising telescopic booms are erected on left and right carts 3A and 3A, respectively, and telescopic beams 10A are installed between the upper ends of the telescopic struts 11A and 11A. Configured. The telescopic strut 11A, the telescopic beam 10A and the like are generally expanded and contracted by a hydraulic cylinder. One hydraulic unit 5A serving as a driving source for the hydraulic cylinder is installed on each of the carriages 3A and 3A.

  A three-stage boom is used for each of the telescopic columns 11A and 11A. Then, as shown by the solid line in FIG. 15, the lifter device can be loaded on the truck bed 81 in a state in which each of the telescopic columns 11 </ b> A and 11 </ b> A and the telescopic beam 10 </ b> A is contracted to the minimum. In order to lower the lifter device from the truck bed 81, first, as shown by the chain line in FIG. 15, the telescopic beam 10A is extended to the left and right, and the distance between the carts 3A, 3A (and the telescopic columns 11A, 11A) is set. After expanding the truck bed 81 to a position straddling the width direction, the wheels 33A, 33A of the carriages 3A, 3A can be grounded to the ground G by extending the telescopic columns 11A, 11A as shown in FIG. it can. Therefore, the entire process from the state in which the lifter device is mounted on the truck bed 81 until it becomes independent on the ground can be performed by the lifter device itself.

  The truck-mounted lifter device shown in FIG. 15 can be loaded and transported on a truck bed 81. However, when the lifter device is mounted on the truck bed 81 and travels on a public road, the height is restricted by the road transport vehicle method (H1). Is 3.8m. Further, as a truck on which this type of lifter device can be mounted, a considerably large truck is used, so that the upper surface height H0 of the truck bed 81 is about 1.2 to 1.3 m. Therefore, in this truck mounted lifter device, it is necessary to limit the total height of the lifter device itself to 2.5 to 2.6 m when the telescopic struts 11A and 11A are in the most contracted state. In the state where the lifter device is mounted on the truck bed 81, the lifter device is supported by the support base 9 in a state where the wheels 33A of the carriage 3A float from the upper surface of the truck bed 81. Overall height is limited to about 2.4-2.5m.

  By the way, in the truck-mounted lifter device shown in FIGS. 15 and 16, when the loading / unloading baggage Y is high, when the loading / unloading of the baggage Y to a high position (for example, on the truck bed), the lifting height of the beam 10A is increased. Therefore, it is necessary to increase the extension stroke S1 of the extension column 11A.

JP 2001-341980 A

  In the lifter device shown in FIGS. 15 and 16, in order to increase the lift of the beam 10A, it is necessary to increase the expansion / contraction stroke S1 of the expansion / contraction columns 11A and 11A. If the number of boom stages is reduced (for example, a three-stage boom), it is necessary to increase the length of the single boom.

  However, in this type of lifter device, if the number of boom stages is increased (for example, a five-stage boom), the overall height of the lifter apparatus can be lowered with the telescopic struts being contracted to the minimum, but a large number of single booms need to be expanded and contracted. As a result, the structure of each of the telescopic struts 11A and 11A becomes complicated and the cost increases, and the weight of the telescopic strut 11A becomes heavy and the entire lifter becomes heavy. On the other hand, if the number of boom stages is reduced (for example, a three-stage boom) and the length of a single boom is increased, the beam height increases even when the telescopic strut 11A is fully contracted, and a high storage space is required when not in use. become.

  Further, in the truck-mounted lifter device as shown in FIGS. 15 and 16, the single boom length of the telescopic support 11A is such that the total height H1 in the truck-mounted state when traveling on a public road is limited to 3.8 m. Thus, the lift H2 of the beam 10A cannot be made very large. That is, in the state where the lifter device is mounted on the truck bed 81 as shown in FIG. 15, the allowable height of the lifter device itself obtained by reducing the upper surface height H0 (1.2 to 1.3 m) of the truck bed 81 is 2. When the height of the carriage 3A itself and the thickness of the beam 10A are reduced, the actual allowable length when the telescopic support 11A is contracted is about 1.6 to 1.7 m. In the case of a three-stage boom, the maximum expansion / contraction stroke S1 is considerably shortened to about 2.2 to 2.4 m except for the overlapping allowance of each boom. Therefore, the maximum height (H2 in FIG. 16) of the beam 10A when using the lifter device can be lifted only up to about 4 m, which makes it impossible to load and unload a high load Y at a high position. There is.

  If a self-propelled type is used for the lifter carriage 3A, it is necessary to use a relatively large diameter wheel 33A and installation space for travel drive means (hydraulic motor, gear device, etc.). Therefore, the total height of the traveling carriage is increased to about 500 mm. Therefore, in the truck-mounted lifter device, when a self-propelled traveling carriage is used, it is necessary to shorten the length of the telescopic support column as the total height of the carriage increases.

  Therefore, the present invention is capable of keeping the height of the telescopic struts to a certain extent while the overall height can be kept low even when the lifter device uses a self-propelled traveling carriage. It is an object.

  The present invention has the following configuration as means for solving the above problems. The present invention is a lifter device used for loading and unloading loads (heavy objects), installation work of machines, and the like, and is particularly intended for a self-propelled lifter device that can travel by itself.

[Invention of claim 1 of the present application]
The self-propelled lifter device according to the first aspect of the present invention supports the four corners of an elevating frame having a substantially rectangular plane form by supporting each of telescopic struts, and further includes travel driving means at the lower part of each telescopic strut. A cart is arranged.

  As each of the telescopic struts (four), a telescopic boom type can be adopted, but the telescopic strut used in the present application may have a relatively small number of boom stages such as a three-stage boom. The number of boom stages is not particularly limited. Also, considering that each of the telescopic struts is placed on a truck bed and transported, it is appropriate that the length is about 2.3 to 2.4 m in the most contracted state.

  The elevating frame is obtained by assembling a frame material into a substantially rectangular shape. The lifting frame is attached directly or indirectly via a swinging frame to a predetermined height position of the uppermost boom of each telescopic support column. It is preferable that the assembly position of the elevating frame does not protrude upward from the upper end portion of each telescopic column. The lifting frame may be provided with a support tool (or a gripping tool) for gripping luggage.

  Each traveling carriage (four) is independent of each other and is configured to be able to travel by traveling drive means (for example, a hydraulic motor or an electric motor). Each traveling carriage is preferably provided with four wheels (which can stand on its own). Since this traveling carriage is self-propelled, a relatively large wheel (wheel diameter is, for example, about 40 cm) is used, so the overall height is considerably high (for example, the overall height of the traveling carriage is about 50 cm).

  In the self-propelled lifter device according to claim 1 of the present application, each traveling carriage (four) is detachably attached to the lower end portion of each telescopic column. The traveling carriage can be attached to and detached from the lower end of each telescopic strut by, for example, connecting / disconnecting with a bolt or locking / unlocking with an appropriate stopper. In addition, this self-propelled lifter device becomes a lifter main body in which the elevating frame and the respective telescopic struts are united when the traveling carriage is separated from the lower ends of the respective telescopic struts.

  The self-propelled lifter device according to the first aspect is mounted on a truck bed and transported to a place of use. During transport, each traveling cart is separated from the lifter body (each telescopic strut). In this way, if each traveling carriage is separated from the lifter body, the height of the lifter device can be lowered by the amount of the traveling carriage, so that the total height (the height of the truck bed + the height of the lifter body) when transported by truck Can be lowered.

  By the way, when trucking on public roads, there is a height limit (3.8m) according to the road transport vehicle law, and the total height of the transported goods (lifter device) mounted on the truck bed is from the above limit height of 3.8m. It is necessary to keep the height of the truck bed (about 1.3m at the maximum) below the height (about 2.5m). In addition, when placing the lifter device on the truck bed, the rocker or the like is interposed in the carriage contact portion and is designed to be somewhat lower than the allowable limit (about 2.5 m). The actual height of the device is about 2.4 m or less.

  Therefore, as in the self-propelled lifter device according to claim 1 of the present application, in the case where each traveling carriage can be separated from the lifter body (each telescopic support), the height of the lifter body in the state where each telescopic support is reduced to the minimum. Can be set high up to the vicinity of the allowable limit (about 2.4 m at the maximum). Therefore, the single boom length of each telescopic support column can be increased, and as a result, the lifting stroke of the lifting frame portion can be increased.

  In addition, this self-propelled lifter device is loaded on the truck bed in a state where each traveling carriage is separated as described above when transporting the truck. However, the traveling carriage can be assembled to the lower end of each telescopic support column at the site of use. it can. And in the state which assembled | attached each traveling trolley | bogie to the lifter main body, the whole lifter apparatus can be drive | worked with the each driving means.

Further, in self-propelled lifter apparatus invention according to claim 1, together have established power unit serving as various power sources of the lifter device to the lifting frame, and supplies power to the travel drive means of each traveling vehicle from the power unit I am doing so.

The power unit includes an engine, a hydraulic pump, and a hydraulic oil tank as a hydraulic pressure generator, and a battery and a fuel tank as related parts. Then, these power unit (and its associated components) is installed in lift frame, which including the power unit in the claim 1 is lifter body.

Meanwhile, as the first aspect, when installing the power unit to the lifting frame, in order to avoid high overall height of the lifter body by the power unit, the lift frame for each telescopic strut, telescopic strut upper portion It is better to fix it at a position where it is lowered by the maximum height range of the power unit (the maximum height of the power unit and the top surface of each telescopic column are the same height).

The power unit mainly supplies power (hydraulic fluid) to the hydraulic cylinders of the telescopic struts. In the self-propelled lifter device according to claim 1 , each of the traveling drive means (hydraulic motor) of each traveling carriage is also provided. Power (hydraulic oil) is supplied. In addition, since the distance from a power unit changes with expansion / contraction of an extending | stretching support | pillar of a traveling trolley, the hydraulic hose is extended to the power supply position of a traveling trolley via a hose reel, respectively.

[Invention of claim 2 of the present application]
The invention according to claim 2 of the present application is the self-propelled lifter device according to claim 1, wherein the two traveling carts positioned on the front, rear, left and right are connected to each other with each traveling cart attached to the lower end of each telescopic column. It can be connected with tools.

By the way, although the upper part of each expansion-contraction support | pillar is firmly connected with the raising / lowering frame, the lower part of this each expansion-contraction support | pillar is not connected especially (the intensity | strength of a tilting direction is weak). Therefore, as in the second aspect, when the two traveling carriages positioned on the front, rear, left, and right are respectively connected by a connecting tool, the respective telescopic support columns standing on the respective traveling carriages do not individually tilt.

[Invention of claim 3 of the present application]
The invention of claim 3 of the present application is such that in the self-propelled lifter device of claim 1 or 2, as each traveling carriage, a column mounting base for attaching the lower end portion of the telescopic column and a wheel mounting base to which a wheel is mounted can be rotated horizontally. On the other hand, a jack that can lift the wheel from the ground is provided on the column mounting base.

  In the self-propelled lifter device according to the third aspect, the entire lifter device can be caused to travel in the direction facing each wheel by the traveling drive means of each traveling carriage. Since the load is applied, the traveling direction of each wheel cannot be changed. And in order to change the advancing direction, first, each jack provided in each traveling carriage is extended, and each wheel is floated from the ground. In this state, the entire lifter device is supported by four jacks and no load is applied to the wheel mounts of each traveling carriage, so the wheel mounts can be rotated horizontally with respect to the column mounts manually. It has become. Then, after the wheel mounting base of each traveling carriage is horizontally rotated so that the wheels face the desired traveling direction, each jack may be reduced to ground each wheel.

[Effect of the invention of claim 1 of the present application]
In the self-propelled lifter device according to the first aspect of the present invention, since the traveling carriage can be detachably attached to the lower end portion of each telescopic support column, the following effects can be obtained.

  In other words, during transportation, each traveling carriage can be loaded on the truck bed in a state where it is separated from the lifter main body (lower end of each telescopic column), so that the total height in the truck transportation state is kept low by the height of the traveling carriage. Can do. This means that the length of each telescopic strut can be increased within the allowable range of the height limit (3.8m) by the Road Transport Vehicle Law. Therefore, even with the same number of boom stages, the telescopic stroke (the lift of the load) There is an effect that can be taken greatly.

  In addition, at the time of use, by attaching each traveling carriage to the lifter body, the lifter device can be driven by itself, and the lifter device itself can perform the movement of the suspended load.

In the self-propelled lifter device according to the first aspect of the present invention , a power unit is installed on the elevating frame, and power is supplied from the power unit to the traveling drive means of each traveling carriage. The power (for example, hydraulic oil) from the power unit is mainly used for the expansion / contraction operation of each expansion / contraction column.

Therefore, in the invention of claim 1 , in addition to the above effect, in the case of using a self-propelled traveling carriage provided with traveling driving means, a dedicated power unit for the traveling carriage becomes unnecessary (single In addition, since each traveling carriage part can be configured to be compact and lightweight, the traveling carriage can be easily handled in the case where the traveling carriage can be separated.

[Effect of the invention of claim 2 of the present application]
The invention according to claim 2 of the present application is the self-propelled lifter device according to claim 1, wherein the two traveling carts positioned on the front, rear, left and right are connected to each other with each traveling cart attached to the lower end of each telescopic column. It can be connected with tools.

Therefore, in the invention of claim 2, in addition to the effect of claim 1, the two running carriages positioned in the front, rear, left and right are connected to each other by a connecting tool, so that they are erected on each running carriage. There is an effect that each of the telescopic struts can be reinforced (the respective telescopic struts do not tilt individually).

[Effect of the invention of claim 3 of the present application]
The invention of claim 3 of the present application is the self-propelled lifter device according to claim 1 or 2, wherein a jack that can lift the wheel from the ground is provided on the column mounting base of the traveling carriage, and the wheel is lifted by the jack. Then, the direction of the wheel can be changed by human power.

  Therefore, in the invention of claim 3, in addition to the effect of claim 1 or 2, even if the direction of the wheel cannot be changed when the wheel is grounded, simple operation (four simultaneous jack-up operations) is possible. Thus, the direction of the wheel can be changed manually, and the traveling direction can be easily changed.

  The self-propelled lifter device according to the present embodiment will be described with reference to FIGS. 1 to 14. FIGS. 1 to 5 show the basic structure of the self-propelled lifter device according to this embodiment, and FIGS. Shows how to use the self-propelled lifter device of this embodiment. In this embodiment, for the sake of convenience, the left and right direction in the state of FIG. 1 is referred to as front and rear, and the right and left direction in the right side surface of FIG. 1 (state of FIG. 2) is referred to as left and right.

  The self-propelled lifter device shown in FIG. 1 to FIG. 3 supports the four corners of an elevating frame 10 having a substantially rectangular planar shape with telescopic struts (four in total) 11, 11,. .., 11... Are respectively provided with traveling carriages 3, 3... (A total of four), and a power unit 5 serving as various power sources for the lifter device is installed on the lifting frame 10. . Further, the traveling carriages 3, 3,... Are detachably attached to the lower ends of the telescopic columns 11, 11,.

  The elevating frame 10 is constructed by assembling a frame material in a substantially rectangular plane form. In addition, the size of the plane form (FIG. 3) of the elevating frame 10 is about 5.5 to 5.6 m in the front-rear length and about 2.3 to 2.4 m in the left-right length. It can be accommodated in the interior.

  Supporting tools 19 and 19 for holding the luggage Y (FIGS. 12 to 14) are attached to appropriate positions of the elevating frame 10.

  In this embodiment, each of the telescopic struts 11, 11,... Employs a telescopic boom type composed of a three-stage boom (a lower boom 12, a middle boom 13, and an upper boom 14). Each of the telescopic struts 11 includes a telescopic hydraulic cylinder (not shown). Each of the telescopic struts 11, 11... Serves as a jack for the elevating frame 10.

  By the way, the self-propelled lifter device of this embodiment is designed to be able to get on and off the truck bed 81 by itself as shown in FIGS. 6 to 14 (the detailed configuration will be described later in order). In the example, each of the telescopic struts 11, 11... Is displaced between a state where it is accommodated on the truck bed 81 (FIGS. 6 and 7) and a state where the left and right edges of the truck bed 81 are straddled (FIGS. 8 to 10). In order to achieve this, each of the telescopic struts 11, 11,... Is attached to the tip of a swing frame 21 having a predetermined length (for example, 1.4 to 1.5 m). In the plan view of FIG. 3, when each telescopic strut is at each position indicated by reference numeral 11 or 11 ″, it is a position where the truck can be straddled in the width direction, and each telescopic strut is at a position indicated by reference numeral 11 ′. At some point, it is a position that fits on the truck bed.

  As shown in FIG. 3, each swing frame 21, 21,... Is pivotally supported by shafts 22, 22,. It is installed as possible. The telescopic struts 11, 11,... Are fixed to the distal ends of the swing frames 21, 21,.

  Each of the swing frames 21, 21,... Is moved by a swing cylinder (hydraulic cylinder) 23 to a position directed to the left and right outwards (the position indicated by the solid line) and a front and rear outward respectively in the plan view of FIG. It can be swung within an angle range of 90 ° with respect to the pointing position (the position indicated by the chain line).

  In the state in which the swing frames 21, 21,... Are directed outward in the left and right directions, the inner surface distance between the left and right telescopic struts 11, 11 is considerably wider than the width of the truck bed 81 as shown in FIGS. In the state where the swing frames 21, 21,... Are directed outward in the front-rear direction, all the telescopic struts 11, 11,... Can be accommodated on the truck bed 81 as shown in FIGS. ing. 3, the left and right telescopic struts 11 ″, 11 ″ are connected to the truck bed 81 even in a state where the swing frames 21, 21... Are oriented in an oblique direction (the telescopic struts are at the position 11 ″). It is located outside the width of the.

  Auxiliary legs 25, 25,... Are mounted on the pivotal support portions of the swing frames 21, 21,. Each of the auxiliary legs 25, 25,... Is used when the lifter device is moved on and off the truck bed by itself, and can be slid up and down with respect to the lifting frame 10 and fixed at a desired position. (For example, pin fixing). Each of the auxiliary legs 25, 25,... Is used only when the lifter device gets on and off by itself, but can be detached from the lifting frame 10 except when necessary. The function of each of the auxiliary legs 25, 25,... Will be described later (the description of the lifter device getting-on / off procedure described later is incorporated).

  As shown in FIGS. 4 and 5, each traveling carriage 3, 3,... Has a column mounting base 31 attached to the lower end of the telescopic column 11 (the lower end of the lower boom 12) and wheels 33, 33,. A combination of the attached wheel mounting base 32 and a horizontally rotatable unit is used. Four wheels 33 are used in front, rear, left and right for one traveling carriage 3 so that each traveling carriage 3 can stand on its own.

  A bearing is interposed between the column mounting base 31 and the wheel mounting base 32 in each traveling carriage 3, 3,..., And the wheel mounting base 32 is supported in the state where the wheel 33 is levitated from the ground as will be described later. The mounting base 31 can be rotated horizontally by human power.

  Each of the traveling carriages 3, 3... Is provided with a traveling drive means 34, and the traveling drive means 34 can travel by itself. In this embodiment, as the traveling drive means 34 of the traveling carriage 3, one in which the wheels 33 are driven by a hydraulic motor is employed. In another embodiment, an electric motor may be used as the travel drive means 34.

  Each of the traveling carriages 3, 3,... Is self-propelled and therefore uses a wheel 33 having a considerable diameter (for example, 40 cm). Therefore, the traveling carriage 3 has a considerable height. (Overall height is about 50cm).

  Further, each traveling carriage 3, 3,... Is provided with jacks 4, 4,... At the center of the column mounting base 31 (rotation center of the wheel mounting base 32). As shown by the chain line in FIG. 4, the jacks 4, 4,... Allow the traveling carriage 3 to travel while the ground plate 41 is positioned above the lower surface of the wheel 33 in the contracted state, and the chain line in the expanded state. As shown in the drawing, the ground plate 41 protrudes slightly below the lower surface of the wheel 33 so that the wheel 33 can be lifted from the ground. Each of the jacks 4, 4,... Has a jack-up capability that allows the entire lifter device to float while the load (heavy object) Y is gripped by the lifter device as shown in FIG. Each of the jacks 4, 4,... Uses a hydraulic cylinder, and hydraulic oil from the power unit 5 is also supplied to the hydraulic cylinder. The tip of the hydraulic hose to the jack (hydraulic cylinder) 4 is also detachable from the jack (hydraulic cylinder).

  As shown in FIGS. 4 and 5, each of the traveling carriages 3, 3... Can attach a column mounting base 31 detachably to the lower end portion of the telescopic column 11 (the lower end portion of the lower boom 12). It has become. In this embodiment, in order to align the lower end of the lower boom 12 and the column mounting base 31, a plurality of pin holes 17 and 17 are provided in the vicinity of the outer periphery of the grounding plate 16 at the lower end of the lower boom 12, while the column is fixed. A plurality of projecting pins 36 and 36 are provided on the upper surface of the mounting base 31 to be fitted into the pin holes 17 and 17. In this embodiment, in order to fix the grounding plate 16 of the lower boom 12 to the upper surface of the column mounting base 31, a plurality of stoppers 37, 37 for pressing the outer peripheral edge of the grounding plate 16 are provided on the upper surface of the column mounting base 31. Provided. Each of the stoppers 37, 37 is integrally formed with a pressing piece 38 projecting laterally at the upper end portion, and can be rotated horizontally by loosening the locking bolt. When the presser piece 38 is in the outward retracted position as shown in FIG. 4, the ground plate 16 of the lower boom 12 can be accommodated between the stoppers 37, 37 from above. With the base plate 16 placed on the upper surface of the column mounting base 31, the stoppers 37, 37 are rotated so that the presser pieces 37, 37 are directed to the inwardly pressed positions shown in FIG. Thus, the ground plate 16 can be fixed on the column mounting base 31. As a means for fixing the ground plate 16 of the lower boom 12 on the column mounting base 31, the vicinity of the outer periphery of the ground plate 16 can be directly bolted to the upper surface of the column mounting base 31 (in this case, the bolt is removed). Thus, the ground plate 16 can be separated from the column mounting base 31).

  The power unit 5 serves as various power sources for the self-propelled lifter device, and is installed on the lifting frame 10. As shown in FIG. 3, the power unit 5 includes an engine 51, a hydraulic pump 52, and a hydraulic oil tank 53 as a hydraulic pressure generator, and a battery 54 and a fuel tank 55 as related parts.

  By the way, when the power unit 5 is installed on the lifting frame 10, the lifting frame 10 is mounted on the upper booms 14 of the telescopic struts 11, 11... So that the overall height of the lifter body 1 is not increased by the power unit 5. The upper boom 14 is fixed at a position lowered from the upper end of the upper boom 14 by the maximum height range of the power unit 5 (the highest height of the power unit 5 and the upper surface of the upper boom 14 of each telescopic column 11 are the same height. )

  The power unit 5 mainly supplies power (hydraulic fluid) to the hydraulic cylinders of the telescopic struts 11, but the swing cylinders 23, 23,... For the swing frames 21, 21,. The hydraulic oil is also supplied to the traveling drive means (hydraulic motors) 34, 34,... And the jacks 4, 4,. Since the distance of the traveling carriage 3 from the power unit 5 changes due to the expansion and contraction of the telescopic support 11, the hydraulic hose (not shown) is connected to the hydraulic motor 34 of the traveling carriage 3 (and the hydraulic cylinder of the jack 4) via the hose reel. It is extended to. Further, since each traveling carriage 3, 3,... Is detachable, the tip of each hydraulic hose is detachably attached to a joint portion 35 of a hydraulic motor (traveling drive means) 34.

  The various drive parts of the self-propelled lifter device can be controlled to start and stop by remote operation from the ground.

  In this lifter device, the upper part (upper boom 14) of each telescopic column 11, 11,... Is firmly connected by the lifting frame 10, but the lower part (lower boom 12) of the telescopic column 11, 11 is particularly connected. (The strength in the tilt direction is weak). Therefore, in this embodiment, the traveling carriages 3, 3,... Attached to the lower ends of the respective telescopic struts 11, 11,... Can be connected by the four connecting tools 6, 6,. I have to.

Each of the coupling tools 6, 6... Is adjustable in length, and each end of the coupling tool 6 is engaged with an engagement pin 39 erected on the column mounting base 31 of each traveling carriage 3, 3. On the other hand, it can be detachably engaged. Note that the both end portions of the connector 6 has a threaded portion of the right and left reversed, and is able to fine-tune the overall length of that by rotating the connector 6.

  As shown in FIG. 6, the self-propelled lifter device of this embodiment is placed on the loading platform 81 of the truck 8 and transported to the place of use. However, when trucking on a public road, the height restriction (3 The total height of the lifter device mounted on the truck bed 81 is the height (about 2.5 m) obtained by subtracting the truck bed height (up to about 1.3 m) from the above limit height of 3.8 m. ) It is necessary to keep it below. When the lifter device is placed on the truck bed 81, a board or the like is interposed in the carriage contact portion and is designed to be somewhat lower than the allowable limit (about 2.5 m). The actual height of the lifter device to be used is about 2.4 m or less.

  Therefore, in the self-propelled lifter device of this embodiment, each traveling carriage 3, 3,... Can be attached to and detached from the lower end portion of each telescopic support 11, 11,. .. Are transported separately from the lifter body 1 (the lower end of each telescopic column 11).

  Thus, when the trucks are transported in a state where the traveling carriages 3, 3,... Are separated from the lifter body 1, the height of the lifter device can be lowered by the height of the carriage 3 (about 50 cm) (the lifter body 1 Only the height). This means that the height of the lifter body 1 with the telescopic struts 11, 11,... Being contracted to the minimum can be set high up to the vicinity of the allowable limit (up to about 2.4 m). By increasing the length of the single boom of the telescopic support column 11, the lifting stroke of the lifting frame 10 (reference S in FIGS. 1 and 2) can be increased.

  Further, in the self-propelled lifter device of this embodiment, the power unit 5 as various power sources is installed in the elevating frame 10, and the power (actuation) is applied from the power unit 5 to the traveling drive means 34 of each traveling carriage 3, 3,. Oil), even if the traveling carriage 3 is self-propelled, there is no need to provide a power source for the traveling carriage 3 and the traveling carriage 3 is made compact and lightweight. it can.

  This self-propelled lifter device separates the traveling carriages 3, 3,... From the lifter body 1 as described above during truck transportation, but when used, the lower end of each telescopic support 11, 11,. Attach the traveling carts 3, 3. In the state where the traveling carriages 3, 3,... Are assembled to the lifter body 1, the entire lifter device can be caused to travel by the traveling drive means 34.

  Further, in order to change the traveling direction of the lifter device, the respective jacks 4, 4,... Provided on the respective traveling carriages 3, 3,. The wheels 33 are lifted from the ground, and the wheel mounting bases 32 of the traveling carriages 3, 3,... Are horizontally rotated by human power so that the wheels 33, 33,. After the jacks 4, 4,... Are synchronously reduced and the wheels 33, 33,... Are grounded, the lifter device is caused to travel in a desired direction of travel by operating the travel drive means 34, 34,. Can do.

  Next, a procedure for getting on and off the self-propelled lifter device of this embodiment to and from the truck bed 81 will be described with reference to FIGS. 6-14, each (A) figure is a figure (the figure equivalent to FIG. 1) which made the left side surface of the lifter device the front, and each (B) figure is a right side view of each (A) figure ( FIG. 2 is a diagram corresponding to FIG.

  The self-propelled lifter device is loaded and transported on a truck bed 81 as shown in FIGS. 6 (A) and 6 (B) in a state where the traveling carriages 3, 3... Are separated from the lifter body 1. Each traveling carriage 3, 3,... May be placed in a surplus space on the truck bed 81, or may be transported by another truck.

  When the lifter body 1 is loaded onto the truck bed 81, if there is a crane nearby, the entire lifter body 1 can be lifted with the crane and loaded onto the truck bed 81, but if there is no crane, the lifter body 1 is loaded. By itself, loading is performed in the reverse procedure of the unloading operation described later.

  In the mounted state of the lifter body 1, the swing frames 21, 21,... Are in positions facing the front and rear, respectively, and the entire lifter body 1 is placed on the truck bed 81. When the lifter body 1 is mounted, the four auxiliary legs 25, 25,... Are grounded on the truck bed 81, and the lifter body 1 is supported by the auxiliary legs 25, 25,.

  6 (A) and 6 (B), the lifter body 1 (and each traveling carriage 3, 3,...) Is transported to the place of use, and the lifter device is assembled and unloaded at the place of use as follows. . When assembling and unloading the lifter device, the power unit 5 is operated so that hydraulic oil can be supplied.

  First, as shown in FIGS. 7A and 7B, each telescopic column 11 is slightly extended on a truck bed 81 and the lifter body 1 is supported by each telescopic column 11, and each (four) The auxiliary legs 25 are lowered onto the truck bed 81 until they come into contact with each other and fixed (pin fixed).

  Next, as shown in FIGS. 8A and 8B, each telescopic column 11 is contracted to separate the lower end of the telescopic column from the truck bed 81, and then each swing cylinder 23 is extended to each swing. The moving frame 21 is moved to a position facing left and right outwards. At this time, by the movement of each swing frame 21, each telescopic support column 11 is positioned outside the left and right side edges of the truck bed 81 as shown in FIG. 8B. In this state, the lifter body 1 is supported on the truck bed 81 by four auxiliary legs 25.

  Next, as shown in FIGS. 9 (A) and 9 (B), the traveling carriage 3 is disposed at a position immediately below each of the telescopic struts 11, and then the respective telescopic struts 11 are extended to contact the ground plate 16 at the lower end of the lower boom. Are joined to a predetermined position on the upper surface of the column mounting base 31 of the traveling carriage 3, and the grounding plate 16 is fixed to the upper surface of the column mounting base 31 by each stopper 37 (FIGS. 4 and 5). In this state, the lifter body 1 can be supported by the four traveling carriages 3, 3,. At this time, a hydraulic hose from the power unit 5 is connected to the traveling drive means (hydraulic motor) 34 and the jack 4 of each traveling carriage 3.

  Next, as shown in FIGS. 10A and 10B, each telescopic column 11 is extended to move the elevating frame 10 upward. At this time, each auxiliary leg 25 is removed from the elevating frame 10. In the subsequent work, if the auxiliary legs 25 are not disturbed even when they are attached to the lifting frame 10, the lifting frames 10 may be moved up with the auxiliary legs 25 attached to the lifting frame 10. Good.

  Next, as shown in FIGS. 11 (A) and 11 (B), the two traveling carriages 3, 3 (a pair of left and right) located in the front and rear are connected by a connecting tool 6, respectively. At this time, the left and right traveling carriages are not yet connected by the connecting tool.

  Next, as shown in FIG. 12, a truck 8 loaded with a load (large heavy object) Y is entered into a space in the lifter device, and a wire rope is tied to the load Y on the truck bed 81 to support each support tool. 19 and 19, the telescopic struts 11 are extended to lift the luggage Y. Thereafter, the empty track 8 is advanced and removed from the lifter device portion.

Next, as shown in FIGS. 13A and 13B, the two traveling carts 3, 3 (a pair of front and rear) located on the left and right are connected by a connecting tool 6. In this state, since the four traveling carriage 3 is connected in a square shape by a connecting member 6 of four, without the telescopic strut 11 is tilted individually, thus also the lower portion of the respective telescopic strut 11 reinforcement Is done. 13A and 13B, the lifter device can be moved together with the luggage Y to the target position.

  Further, in order to change (correct) the moving direction of the lifter device during the movement, as shown in FIGS. 14 (A) and 14 (B), the jack 4 provided on each traveling carriage 3 is extended (see FIG. 5). After the jack grounding plate 41 is grounded as shown by a chain line, the lifter device is pushed up), and all the wheels 33 of each traveling carriage 3 are levitated from the ground. In this state, since no load is applied to the wheel mounting base 32 of the traveling carriage 3, the wheel mounting base 32 can be horizontally rotated with respect to the column mounting base 31 by human power. Then, after each wheel 33 is directed in a desired direction, each jack 4 can be reduced to ground each wheel 33 and each lift drive device 34 can be moved in the desired direction.

  Then, the baggage Y can be installed at a predetermined position by carrying the baggage Y to a predetermined position and reducing the telescopic struts 11 there. Thereafter, the lifter device can be moved from the load Y by removing the wire rope from the load Y and removing the connecting tool 6 located at the front and rear from each traveling carriage 3.

  Moreover, in order to load an empty lifter device on the truck bed 81, the following procedure is performed. That is, each telescopic column 11 is extended to move the elevating frame 10 upward (state shown in FIG. 11) → the loading platform 81 of the truck 8 enters the lower space of the elevating frame 10 and the state shown in FIG. Are reduced to some extent, and the four auxiliary legs 25 are attached to the elevating frame 10. Further, the respective telescopic struts 11 are further reduced so that the lower ends of the auxiliary legs 25 are brought into contact with the upper surface of the truck bed 81. Supports the lifter device → Removes each traveling carriage 3 from the lower end of the telescopic support column 11 (the state shown in FIG. 9) → Reduces each telescopic support column 11 (the state shown in FIG. 8) → When the arc is rotated to a position facing outward, the entire lifter body 1 can be loaded in a state of being accommodated on the truck bed 81 as shown in FIG.

  Thus, the self-propelled lifter device of this embodiment can be loaded / unloaded from the truck bed 81 by itself.

  In the self-propelled lifter device of this embodiment, when each traveling carriage 3 is attached to and detached from the lower end of each telescopic column 11, that is, in the working state of FIGS. If the platform is not used, a platform higher than the total height (50 cm) of the traveling carriage 3 is used in place of the truck bed, and the auxiliary legs 25, 25,. A grounding space for the traveling carriage 3 is secured below.

It is a side view of the self-propelled lifter device of the embodiment of the present application. It is a right view of the self-propelled lifter device of FIG. It is a top view of the self-propelled lifter device of FIG. It is an enlarged view of the separation state of the traveling carriage in the self-propelled lifter device of FIG. FIG. 5 is an assembly state diagram of FIG. 4. FIG. 2 is a state of loading a truck bed of the lifter device of FIG. 1. It is a state change figure at the time of unloading of the lifter apparatus from FIG. It is a state change figure at the time of unloading of the lifter apparatus from FIG. It is a state change figure at the time of unloading of the lifter apparatus from FIG. It is a state change figure at the time of the lifter apparatus loading / unloading from FIG. It is explanatory drawing of the preparation stage of the package receipt in the lifter apparatus of FIG. It is a state change figure from Drawing 11 at the time of package receipt. It is a state change figure from Drawing 12 at the time of package receipt. It is explanatory drawing at the time of the advancing direction change in the lifter apparatus of FIG. It is explanatory drawing of a well-known lifter apparatus. It is a state change figure from FIG.

  1 is a lifter body, 3 is a traveling carriage, 4 is a jack, 5 is a power unit, 6 is a connector, 10 is a lifting frame, 11 is a telescopic column, 21 is a swing frame, 25 is an auxiliary leg, 31 is a column mounting base, 32 is a wheel mounting base, 33 is a wheel, and 34 is a traveling drive means.

Claims (3)

A traveling cart (4), which has four corners of an elevating frame (10) having a substantially rectangular planar form supported by telescopic struts (11), and further has travel driving means (34) below each telescopic strut (11). 3) a self-propelled lifter device comprising:
Each traveling carriage (3), while the are mounted for respectively detachably attached to lower ends of the telescopic strut (11),
While installing the power unit (5) used as the various motive power sources of a lifter apparatus in the said raising / lowering frame (10),
Power is supplied from the power unit (5) to the traveling drive means (34) of each traveling carriage (3).
This is a self-propelled lifter device. In claim 1,
With the traveling carts (3) attached to the lower ends of the telescopic struts (11), the two traveling carts (3, 3) positioned on the front, rear, left, and right sides can be connected to each other by a connector (6). Like,
This is a self-propelled lifter device. In claim 1 or 2,
Each traveling carriage (3) uses a combination of a column mounting base (31) for attaching the lower end of the telescopic column (11) and a wheel mounting base (32) to which a wheel (33) is mounted so as to be horizontally rotatable. On the other hand, the support (31) is provided with a jack (4) that can lift the wheel (33) from the ground.
This is a self-propelled lifter device.

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