JP3469665B2 - lift device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting device for loading and unloading objects to be lifted between a first position and a second position higher than the first position. The present invention relates to an elevating device suitable for loading and unloading boats and the like between them.

[0002]

2. Description of the Related Art Generally, when a leisure FRP or a boat made of aluminum alloy or rubber is mounted on a vehicle for transportation, a detachable roof rack is attached to the roof of the vehicle and the like. The boats were manually loaded and unloaded between the roof racks. Some fire engines have a rooftop that can be loaded with a large inflatable rubber boat, but the loading and unloading is done by a crane or the like installed on the vehicle.

[0003]

However, loading and unloading by the former human power must often be performed by a plurality of personnel. In addition, when the boat is large and heavy, it is a dangerous and difficult task. In particular, when the rooftop of the vehicle is high, it is necessary to prepare a scaffolding such as a platform, which makes loading and unloading work difficult.

On the other hand, the latter work using a crane requires skill of the worker and a considerable working time. In addition, since the space required for the crane to operate covers a relatively wide area with respect to the size of the object to be lifted and lowered, where there are obstacles such as electric wires, tree branches, and buildings near the crane, There were drawbacks such as the inability to load and unload with the crane.

An object of the present invention is to provide a lifting device that can easily and safely load and unload objects to be lifted without requiring a vast work space.

[0006]

In order to solve the above-mentioned problems, the invention of claim 1 raises and lowers an object to be lifted and lowered between a first position and a second position higher than the first position. In the device, two guide members that are provided at a second position and that are arranged parallel to the front-rear direction and are arranged rearward and upward; A second position, which is provided below the rear end of the guide member, includes a support member that supports the lower end of the elevating member, and a driving unit that moves the tip end of the elevating member along the guide member. There is.

The invention of claim 2 is the first position and the first position thereof.
In a lifting device that lifts and lowers an object to be lifted between a second position higher than the position, two first guide members that are provided at the second position and that are arranged rearward and parallel to the front-back direction, A first elevating member whose tip is guided by the first guide member, two second guide members provided in the first elevating member and arranged in parallel in the front-rear direction, and a second guide member. A support member that is provided at a position below the rear end of the first guide member and supports the lower end of the first elevating member, and a tip end portion of the first elevating member along the first guide member. First to move
Drive means, a second elevating member in which an object to be elevated and lowered is fixed, and a tip portion thereof is guided by a second guide member, and a tip portion of the second elevating member is moved along the second guide member. It is characterized by including the 2nd drive means to make it.

The invention of claim 3 relates to claim 1 or claim 2.
The elevating device according to claim 1, wherein the drive unit, the first drive unit, or the second drive unit is rotated along the longitudinal direction of the guide member, the first guide member, or the second guide member. Characterized in that the tip of each of the elevating member, the first elevating member, and the second elevating member is connected to at least a part of the loop-shaped movable part. There is.

The invention of claim 4 is claim 1 or claim 2.
The elevating device according to claim 1, wherein the drive unit, the first drive unit, or the second drive unit has a main axis direction in a longitudinal direction of the guide member, the first guide member, or the second guide member. Includes a screw shaft and a female screw member screwed with the screw shaft, and the elevating member, the first elevating member, or the second elevating member has a tip coupled to the female screw member. It is characterized by that.

The invention of claim 5 is from claim 1 to claim 4.
In the elevating device according to any one of items 1 to 7, the guide member, the first guide member, and the second guide member have a C-shaped cross section with facing flanges, Each of the first elevating member and the second elevating member has a roller whose tip end is fitted to the guide member, the first guide member and the brim portion of the second guide member. , The guide member, the first guide member and the second guide member, and the elevating member, the first elevating member and the second elevating member by fitting the roller to the brim portion. It is characterized in that

[0011]

According to the invention of claim 1, the elevating member is supported at its tip by the guide member and at one point on the lower surface by the supporting member. When the elevating member is moved to the rear of the guide member by the driving means, the tip of the elevating member gradually rises along the guide member and rotates about a point supported by the support member. As a result, the rear end of the elevating member gradually descends from the second position and reaches the first position. Also, by the operation opposite to the above, the lifting member
It is also possible to raise from the first position to the second position.

According to the second aspect of the present invention, the tip end of the first elevating member is supported by the first guide member, and one point on the lower surface thereof is supported by the supporting member. When the first elevating member is moved to the rear of the first guide member by the first driving means, the tip of the first elevating member gradually rises along the first guide member and the supporting member. It rotates around a point supported by. As a result, the rear end of the first elevating member gradually descends from the second position, and
Reach the position of. Next, when the second elevating member is moved to the rear of the first elevating member by the second driving means,
The tip of the second elevating member gradually descends along the second guide member and reaches the first position or its vicinity. On the other hand, the rear end of the second elevating member moves along the ground or the like at the first position. As a result, the second elevating member can be lowered from the second position to a state in which it is parallel or nearly parallel to the ground or the like at the first position. Further, by the operation reverse to the above, the second elevating member can also be raised from the first position to the second position.

[0013]

【Example】

(First Embodiment) Hereinafter, the embodiments will be described in more detail with reference to the drawings. 1 to 3 are views showing a first embodiment of an elevating device according to the present invention.
FIG. 2 is a side view and a rear view showing a state of being stored on the roof of the vehicle body, and FIG. 3 is a side view showing a state of lowering the loading platform to the ground. In this embodiment, the lifting device according to the present invention is attached to the roof of a vehicle, and a boat or the like is lifted between the roof of the vehicle and the ground as a lifting target.

As shown in FIGS. 1 and 2, two fixed rails 1 are provided on the left and right sides of the roof of the vehicle body. The fixed rail 1 is attached rearward and upward by a column 15 provided at the rear end of the vehicle body. The fixed rail 1 is a C-shaped grooved steel having a brim portion (lip portion) facing the opening side, and in this embodiment, a rail having a lip groove type cross section is used. The fixed rail 1 functions as a first guide member.

Sprockets 7c and 7d are rotatably attached to the front end and the rear end of the fixed rail 1, respectively. A loop-shaped roller chain 20 is attached to the sprockets 7c and 7d so as to circulate the outside thereof. A fixed motor 11 is installed on the roof of the vehicle body, and a sprocket 7a is mounted on the fixed motor 11. The fixed motor 11 is capable of rotating in the normal direction or in the reverse direction, and its rotation is dependent on the sprocket
a is transmitted to the roller chain 20 via the sprockets 7b and 7c, and the roller chain 20 is
Driven back and forth. The fixed motor 11 can be controlled by the remote control switch 13 to rotate forward and backward.

Although not shown, another sprocket 7b is mounted on the shaft of the sprocket 7c. Since the shaft of the sprocket 7c is integrally connected to the sprocket shafts of the two left and right fixed rails 1, the left and right roller chains 20 are not driven unevenly. Therefore, the two roller chains 20 are always driven and stopped at the same time, and the speed during driving is also the same. Sprockets 7a, 7b, 7c and 7d, roller chain 20,
The fixed motor 11 fulfills the function of the first drive means.

The two moving rails 3 are installed so as to be sandwiched between the left and right fixed rails 1 (see FIGS. 2 and 3). The moving rail 3 has a lip groove type cross section,
It functions as a second guide member. A roller 9 is rotatably attached to the front part of the moving rail 3 as shown in FIG. The roller 9 has a recess on the outer peripheral surface and rolls in the fixed rail 1. Further, the shaft of the roller 9 is fixed to the roller chain 20 by a connecting fitting 21.

The rear end of the moving rail 3 is a cushioning material (not shown in the figure) for absorbing a shock when that portion comes into contact with the ground.
It is the grounding part where is attached. A cross member 36 for supporting the lower surface of the rear end of the loading platform 5 is attached to the lower side slightly forward of the ground contact portion (FIG. 2). The two moving rails 3 and the cross member 36 form an inner frame for loading the luggage carrier 5. Here, the moving rail 3, the roller 9, the connecting fitting 21, and the cross member 36 function as a first elevating member.

As shown in FIG. 3, the movable rail 3 has sprocket wheels 8g and 8h rotatably attached to the front and rear ends thereof. A loop-shaped roller chain (not shown) is attached to the sprockets 8g and 8h so as to circulate the outside thereof. Although not shown,
A sprocket 8f is mounted on the sprocket 8g axis.

The moving motor 12 is provided at the front part of the moving rail 3, and has a sprocket 8e attached to its output shaft. The forward rotation or the reverse rotation of the moving motor 12 causes the rotation thereof to be transmitted to the roller chain by the sprocket 8e via the sprockets 8f and 8g, and the roller chain is driven back and forth. The moving motor 12 can control forward / reverse rotation by a remote control switch 13.
Since the shaft of the sprocket 8g is integrally connected to the sprocket shafts of the two left and right moving rails 3, the left and right roller chains do not drive unevenly. Therefore, 2
The two roller chains always drive and stop at the same time, and the speed at the time of driving is also the same. Here, the sprocket 8
e, 8f, 8g and 8h, the roller chain and the fixed motor 12 serve as the second drive means.

As shown in FIG. 2, the loading platform 5 is installed so as to be sandwiched between two left and right moving rails 3. As shown in FIG. 5, a roller 10 having a concave portion on its outer peripheral surface is rotatably attached to the front portion of the loading platform 5. The roller 10 rolls in the moving rail 3. Also, roller 1
The shaft of 0 is fixed to a roller chain (not shown) arranged in the moving rail 3 by a connecting fitting (not shown). The upper surface of the loading platform 5 has a shape suitable for loading a load and is provided with a tightening device 32 for securing the load. Two moving rollers 31 are attached to the lower surface of the rear end of the loading platform 5. Here, the loading platform 5, the roller 10, the connecting fitting, the tightening device 32, and the moving roller 31 function as a second elevating member.

The fixed rollers 2 are attached at two positions on the rear end of the roof of the vehicle body (FIG. 2), and the upper side is in contact with the lower surface of the moving rail 3. The fixed roller 2 functions as a support member.

FIG. 5 is a sectional view schematically showing the connection relationship between the fixed rail 1, the movable rail 3 and the loading platform 5. The sprocket 7a is attached to the fixed rail 1, and the roller chain 20 is hung on the outer periphery thereof. The roller 9 is attached to the roller chain 20 via a connecting fitting 21. The roller 9 is inserted in the lip portion of the fixed rail 1 so that a groove, which is a concave portion of the outer peripheral portion, fits into the lip portion. To this end, the roller 9
Can be stably rolled along the fixed rail 1 as the roller chain 20 moves back and forth. Further, since the roller 9 is fixed to the moving rail 3, its movement is transmitted to the moving rail 3.

The connection relationship between the movable rail 3, the roller 10 and the carrier 5 is the same as the above-mentioned connection relationship between the fixed rail 1, the roller 9 and the movable rail 3. It should be noted that, in the figure, the connecting metal fittings and the roller chain in the moving rail 3 are not shown.

In this embodiment, the fixed motor 11 and the moving motor 12 are small-sized and high-torque oil motors. Further, the fixed motor 11 and the moving motor 12 are
It is connected to the oil pump through a solenoid valve (not shown). The oil pump is directly connected to an electric motor driven by battery power. The solenoid valve is operated by the remote control switch 13.

Limit switches are installed at the front end of the fixed rail 1 and the front end of the movable rail 3 to detect the forward stroke end of the movable rail 3 and the loading platform 5, respectively. Ball casters (not shown) are installed inside the columns that support the rear ends of the fixed rails 1 and are in contact with the left and right sides of the movable rail 3 to roll.

Next, the lifting device is changed from the state shown in FIG. 1 to the state shown in FIG.
The operation when operating to the state will be described. First, the fixed motor 11 is driven by operating the remote control switch 13. The rotation of the fixed motor 11 is converted into movement of the moving rail 3 and the loading platform 5 rearward of the vehicle body through the sprockets 7a, 7b and 7c and the roller chain 20. At this time, since the roller 9 attached to the front part of the moving rail 3 rolls along the fixed rail 1, the moving rail 3 and the front part of the loading platform 5 gradually move up along with the movement [FIG. ), (B), (c)]. Also,
Since a part of the lower surface of the moving rail 3 is supported by the fixed roller 2, the moving rail 3 and the loading platform 5 gradually rotate around a support point on the fixed roller 2 as the moving rail 3 and the loading platform 5 move. The rear end of 5 descends. Fixed motor 1
The driving of No. 1 is stopped after at least one of the grounding portion of the moving rail 3 and the moving roller 31 of the loading platform 5 contacts the ground [Fig. 4 (d)].

Next, the remote control switch 13
The movement motor 12 is driven by the operation of. The rotation of the moving motor 12 is transmitted to the luggage carrier 5 through the sprockets 8e, 8f and 8g and the roller chain. As a result, the loading platform 5 is delivered to the rear of the moving rail 3. At this time, the roller 10 at the front end of the loading platform 5 rolls along the moving rail 3. Therefore, the front part of the loading platform 5 gradually descends as it moves [FIGS. 4 (e) and 4 (f)]. Further, the moving roller 31 at the rear end of the loading platform 5 rolls along the ground. The front part of the loading platform 5 becomes sufficiently low, the driving of the moving motor 12 is stopped after the loading platform 5 reaches a state in which the loading platform 5 is parallel or nearly parallel to the ground, and the lifting device is in the state shown in FIG. In this state, it is possible to load a load on the loading platform 5 and fix the load to the loading platform 5 by the tightening device 32 (or unload the loaded loading platform 5).

FIG. 4 shows the operation of the moving rail 3 and the loading platform 5 when the above-described operation is performed, and the moving rail 3 and the loading platform 5 are located at the very center of the moving roller 31 which is a supporting member. It can be seen that it is moving in a small space nearby.

On the other hand, by the operation opposite to the above, it is possible to accurately mount the movable rail 3 and the loading platform 5 in the state of FIG. 3 on the roof of the vehicle body as shown in FIG. this is,
The same is possible regardless of whether or not a load is loaded on the loading platform 5. The moving rail 3 or the loading platform 5 is shown in FIG.
Whether or not the position has returned to the position shown in is confirmed by a signal from the limit switch. In this lifting device, the fixed rail 1, the moving rail 3, and the loading platform 5 do not vertically overlap when mounted on the roof of the vehicle body as described above. For this reason, the loading platform 5 can be mounted immediately above the roof of the vehicle body, and the ground clearance of the cargo can be kept low.

During operation of the apparatus, (1) when one or both of the lower surfaces of the two left and right moving rails 3 floats from the fixed roller 2, (2) the grounding portions of the two left and right moving rails 3 When one or both of them float from the ground, or (3) one of the two left and right moving rollers 31 of the loading platform 5 floats from the ground, it is possible to continue the operation without any trouble. .

Further, the ball casters inside the columns supporting the fixed rail 1 sandwich the moving rail 3 in the left-right direction and guide the movement thereof. As a result, due to the slope of the ground, the inclination of the vehicle body in the left-right direction, etc.
Can be prevented from shifting in the left-right direction. As a result, under any circumstances, the lifting device can be operated smoothly and without requiring skilled skill. Although the roller chain is used as the driving means in this embodiment, other means such as a metal belt, a timing belt or a wire may be used as long as it has a loop shape and has sufficient strength. is there.

(Second Embodiment) FIG. 6 is a view schematically showing a second embodiment of the lifting device according to the present invention. In addition, the same code | symbol is attached | subjected to the part which performs the same function as 1st Example, and the overlapping description is abbreviate | omitted suitably. In the first embodiment, the first drive means and the second drive means have been described as an example using a roller chain, but in the present embodiment,
Instead, a screw shaft is used.

Two sprocket wheels 55a and 55b are attached to the fixed motor 11. The sprocket 55a and the sprocket 56 attached to the screw shaft 50 have loop roller chains 57a hung between them. Screw shaft 50
Is a bearing 4 in the fixed rail 1 indicated by the chain double-dashed line.
It is rotatably provided via 0a and 40b.
Further, a female screw 45 is screwed onto the screw shaft 50 on the screw shaft 50.
Is connected to the moving rail 3 via a shaft 60.

When the fixed motor 11 is normally or reversely rotated,
The rotational movement of the fixed motor 11 is caused by the sprockets 55a, 5
It is transmitted to the screw shaft 50 via 6. The rotation of the screw shaft 50 is converted into a back-and-forth movement along the fixed rail 1 by the female screw 45, and the moving rail 3 can be moved back and forth. Although not shown in the figure, in the present embodiment, since the same driving means as above is also installed in the moving rail 3, the fixed motor 1
By driving 1 and the moving motor 12, it is possible to operate the moving rail 3 and the loading platform 5 as in the first embodiment.

(Other Embodiments) The present invention is not limited to the embodiments described above, and various modifications and changes are possible, and these are also included in the present invention. In the above example,
The guide member (fixed rail 1, moving rail 3) uses a rail having a lip groove type cross section, but if the cross sectional shape is a C type with facing flanges, it may be any other member. It can be used even if there is. For example, a groove-shaped steel may be provided with a rod-shaped member having a cross-sectional shape (round or square) capable of contacting the concave portion of the roller (9, 10). The rollers (9, 10) may be formed by grooving the cylindrical surface of the cylindrical member, or may be formed by joining flanges to the flat surfaces at both ends of the cylindrical member. Further, as shown in FIG. 7, the fixed rail 1 has a front end rotatably supported by a shaft and a rear end supported by a hydraulic cylinder 16 instead of the support column 15, so that the fixed rail 1 can be expanded and contracted according to the expansion and contraction of the hydraulic cylinder 16. It is possible to move the edge up and down. As a result, the present lifting device has an effect that the rear end of the fixed rail can be lowered and its overall height can be lowered when the load is stored without being loaded. Further, when the rear end of the fixed rail 1 is moved up and down during the raising and lowering operation of the present device, the movable rail 3 changes the position where the rear end contacts the ground back and forth. As a result, when the road surface condition is not suitable for the grounding of the moving rail 3, the lifting device is
There is also an effect that the ground contact position can be finely adjusted. In each of the above embodiments, the lifting device for lifting the boat on the roof of the vehicle is shown as an example, but instead of the vehicle, it may be a three-dimensional platform for storing the boat or the like in a plurality of stages, or other large articles are three-dimensional. It may be a hangar or the like for temporarily storing. Further, in each of the above-described embodiments, an example using two lifting members (moving rails 3, loading platform 5) has been described, but the first lifting member (where the lifting target is grounded at the first position) ( As long as the movable rail 3) can be easily leaned against and fastened to the moving rail 3), it is also possible to use the first elevating member as the loading platform without attaching the second lifting member (the loading platform 5).

[0037]

As described above, according to the present invention,
Since the elevating member moves on a track near the supporting member defined by the guide member and the supporting member, the elevating and lowering object attached to the elevating member does not require a large working space or special skill, and can be safely and easily, It is possible to move up and down between a first position and a second, higher position.

[Brief description of drawings]

FIG. 1 is a side view showing a first embodiment of an elevating device according to the present invention (in a state of being stored on the roof of a vehicle body).

FIG. 2 is a rear view showing the first embodiment of the lifting device according to the present invention (in a state of being stored on the roof of the vehicle body).

FIG. 3 is a side view showing a first embodiment of an elevating device according to the present invention (a state of being lowered from the roof of a vehicle body to the ground).

FIG. 4 is a side view showing the outline of the operation of the lifting device according to the first embodiment.

FIG. 5 is a partial cross-sectional view showing a connection relationship between a fixed rail, a moving rail, a loading platform, etc. of the lifting device according to the first embodiment.

FIG. 6 is a schematic view partially showing a second embodiment of the lifting device according to the present invention.

FIG. 7 is a schematic view showing another embodiment of the lifting device according to the present invention.

[Explanation of symbols]

1 fixed rail 2 fixed roller 3 moving rails 5 loading platform 7 sprockets 8 sprockets 9 Laura 10 Roller 11 Fixed motor 12 Moving motor 13 Remote control switch 15 props 1 6 hydraulic cylinder 20 roller chain 21 Connecting bracket 31 Moving roller 32 tightening device 36 Horizontal material 40 bearing 45 female screw 50 screw shaft 55 sprockets 56 sprockets 57 roller chain 60 axes 65 bearing

Claims (5)

(57) [Claims] 1. A lifting device for lifting an object to be lifted between a first position and a second position higher than the first position, wherein the lifting device is provided at the second position and rises backward in parallel with the front-rear direction. Two linear guide members (1) arranged on the upper and lower parts, an elevating member (3, 5) to which the elevating and lowering object is fixed, and a tip of the elevating member is guided by the guide member (1), At a position below the rear end of the guide member (1) and supporting the lower end of the elevating member (3), and a motor (11) fixed at the second position. And the above
A hand that moves along the guide member as the data rotates.
An elevating device comprising a step (20, 45) and a drive means for moving the tip of the elevating member (3) fixed to the moving means along the guide member. 2. An elevating device for elevating an ascending / descending object between a first position and a second position higher than the first position, wherein the elevating device is provided at the second position and is parallel to the front-back direction and rises backward Two first guide members arranged on the first guide member, a first elevating member whose tip is guided by the first guide member, and a first elevating member that is parallel to the front-rear direction. Two second guide members that are arranged, a support member that is provided at the second position below the rear end of the first guide member, and that supports the lower end of the first elevating member, First drive means for moving the tip end portion of the first elevating member along the first guide member, the elevating and lowering object is fixed, and the tip end portion is guided by the second guide member. A second elevating member, and a tip end portion of the second elevating member along the second guide member. Lifting device comprising a second drive means for moving the. 3. The elevating device according to claim 1, wherein the drive unit, the first drive unit, or the second drive unit is the guide member, the first guide member, or the guide member. A loop-shaped movable portion that circulates along the longitudinal direction of the second guide member is included, and the tip of the elevating member, the first elevating member, or the second elevating member is the loop-shaped movable portion. A lifting device, characterized in that it is connected to at least a part. 4. The elevating device according to claim 1, wherein the drive unit, the first drive unit, or the second drive unit is the guide member, the first guide member, or the guide member. A screw shaft whose main axis direction coincides with the longitudinal direction of the second guide member; and a female screw member screwed with the screw shaft, wherein the elevating member, the first elevating member, or the second elevating member is The lifting device is characterized in that its tip is connected to the female screw member. 5. Any one of claims 1 to 4
The elevating device according to paragraph 1, wherein the guide member, the first guide member, and the second guide member have a C-shaped cross section with facing flanges, and the elevating member, the first elevating device. The member and the second elevating / lowering member have a roller having a tip end portion that is fitted to the brim portions of the guide member, the first guide member and the second guide member, and the roller is The guide member, the first guide member, and the second guide member are combined with the elevating member, the first elevating member, and the second elevating member by fitting them into the brim portion. A lifting device characterized by the following.