JP3446090B2 - Simple crane for truck - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a simple crane for trucks.

[0002]

2. Description of the Related Art Conventionally, in a light truck or the like, a simple crane has been installed in order to save labor for loading and unloading cargo to be transported and to improve efficiency.

As a conventional simple crane of this type,
For example, there is one described in Japanese Utility Model Publication No. 63-41427.

That is, as shown in FIG. 10, a simple crane 101 has a base 102 to be installed on a bed of a vehicle, a support 103 installed upright on the base 102, and a support 1
03, a boom mechanism 105 that is provided so as to be pivotable and has a winch 104 arranged at an appropriate position, and an outrigger 106 that extends from the vehicle and is grounded during loading / unloading work.

The base 102 is a horizontal frame 102a.
The vertical frame 102b has a plane L-shape, and seat plates 107 are provided at the middle and both ends of the base 102, and the seat plates 107 are fixed by inserting bolts into the cargo bed.

The pillar 103 is composed of a main pole 109 fixed to the corner of the base 102 by a bolt via a fixing plate 108, and a movable pole 110 inserted into the main pole 109 so as to be movable up and down. ing. An insertion hole 112 for the stopper pin 111 is formed near the upper portion of the main pole 109, and first and second insertion holes (not shown) that align with the insertion hole 112 are formed in the middle and lower portions of the movable pole 110 in the longitudinal direction. Has been done.

The boom mechanism 105 includes a movable pole 11
Cylindrical brackets 113, 1 rotatably fitted to 0
14 and a boom body 1 having a base end pivotally attached to a tubular bracket 113 so as to be capable of undulating and a roller 115 attached to the front end.
16, a tubular bracket 114, and a boom body 116, each end of which is pivotally attached, and is a telescopic support 1 that is telescopic.
The wire cable 119 wound around the winch 104 descends via the roller 115 of the boom body 116, and the hanging metal fitting 120 is connected to the tip thereof.

The outrigger 106 is the fixing plate 1
Movable rod 122 slidably inserted in the horizontal pipe 121 fixed to 08, a pedestal 123 pivotably attached to the movable rod 122 so as to be up and down, and an extensible attachment to the pedestal 123. And a ground plate 124.

Further, in this conventional example, the movable pole 11
The lift of 0 is automatically adjusted by using the winch 104. To this end, the lower tubular bracket 114 is provided with a pivotal mount 125, which is
A guide roller 126 is provided on the side portion of No. 5. On the other hand, a sub pole 127 is provided on the side surface of the main pole 109, and a locking piece 129 for locking a cushioning piece 128 arranged at the rear portion of the hanging metal fitting 120 is provided on the upper side of the sub pole 127. The sub pole 127 can be attached / detached to / from a support fitting 130 provided on the side surface of the main pole 109.

In the above structure, the outrigger 106 is pulled out to stack the ground plate 1 when stacking.
24 is grounded, the supports 117 and 118 are extended, and the boom body 116 is set at an upward working angle. Then, the boom mechanism 1 is formed by the tubular brackets 113 and 114.
05 is rotated around the movable pole 110, the winch 104 is driven when the hanging metal fitting 120 reaches the luggage, and the wire cable 119 is paid out.
Is connected to the luggage to drive the winch 104 and the boom mechanism 105 may be swung around the movable pole 110.

When the load is tall and the lift is insufficient in a normal state, the stopper pin 111 is removed from the insertion hole 112 and the first insertion hole (not shown), and the sub pole 127 is attached to the main pole 109. Set along. Next, drive the winch 104 to drive the wire cable 1
19 is paid out and raised via the guide roller 126 provided on the plate with the support 117, and the sub pole 127
Hang it on the locking piece 129 at the top of the. Then winch 10
When 4 is driven to rewind the wire cable 119, the buffer piece 128 of the hanging metal fitting 120 is locked by the locking piece 129 and the hanging metal fitting 120 is fixed, so that the winch 104 continues to be driven and the guide roller is continued. An upward pulling force is applied to 126. The guide roller 126 is the pivotally mounted hardware 12.
Since the movable pole 110 is integrated with the movable pole 110 by means of the 5 and the tubular bracket 114, the movable pole 110 rises with respect to the main pole 109 fixed to the luggage carrier. Then, the winch 104 is stopped when the insertion hole 112 and the second insertion hole (not shown) are moved up by a certain amount and the stopper pin 111 is inserted into the insertion hole 112 and the second insertion hole to move the winch 104. The pole 110 is fixed in the raised state, and the pole body 10
3 is in the expanded state. In this way, the lifting height is adjusted.

[0012]

However, in the conventional simple type crane as described above, the height of the pole of the sub pole 127 provided with the locking piece 129 is made higher than the height of the support body 103 in the stored state. In order to adjust the lifting height of the movable pole 110, the work of hanging the wire cable 119 fed out from the winch 104 to the locking piece 129 of the sub pole 127 via the guide roller 126 is performed by the operator on the platform. It couldn't be done without it.

Therefore, there is a problem that the work becomes complicated and the workability is deteriorated.

The present invention has been made in view of the above,
An object of the present invention is to provide a simple crane for a truck that can easily adjust the lifting height without requiring human power and can be operated on the ground.

[0015]

In order to solve the above-mentioned problems, the invention of claim 1 provides a base installed on the bed of a truck, and a fixed pole erected on the base.
At least the height 2
A movable pole that can be connected and fixed to a fixed pole at a site, a tubular bracket consisting of a pair of upper and lower rotatably fitted to the movable pole, and a boom body having a base end pivotally attached to the upper tubular bracket, One end is attached to the lower tubular bracket, the other end is pivotally attached to the boom body, and the support is extendable and retractable, an electric winch mounted on the boom body, and a support member fixed to the upper end of the fixed pole. And a case attached to the movable pole and having a pair of upper and lower rotatable pulleys, and a wire having one end locked to the support member and pulled out from an opening at the upper end of the case through a pulley at the lower portion to an pulley at the upper portion. It is characterized by comprising a cable and a hook portion which is provided at the other end of the wire cable and which engages with a hanging metal fitting of the wire cable of the winch in a detachable manner.

According to the invention of claim 2, a base installed on the bed of the truck, a fixed pole standing on the base, and a fixed pole that can be moved up and down and fixed at at least two high and low portions. A movable pole that can be connected and fixed to the pole, a cylindrical bracket consisting of a pair of upper and lower parts that are rotatably fitted to the movable pole, a boom body whose base end is pivotally attached to the upper cylindrical bracket, and one end that is lower. A case having a tubular bracket, the other end of which is pivotally attached to the boom main body and is extendable and retractable, an electric winch mounted on the boom main body, and a pair of upper and lower rotatable pulleys attached to the movable pole. A guide pole that is erected on the base along the fixed pole and is inserted into a through hole of a guide member provided in the case to guide vertical movement of the case; A support member fixed to the upper end of the id pole, a wire cable having one end locked to the support member, drawn out from the opening at the upper end of the case through the pulley at the lower portion to the pulley at the upper portion, and the wire cable It is characterized in that it comprises a hook portion provided at the other end, which engages with the hanging fitting of the winch wire cable in a detachable manner.

[0017]

According to the first aspect of the invention, only the boom mechanism rotates around the outer periphery of the movable pole via the tubular bracket when turning for loading and unloading, and the movable pole and the fixed pole do not rotate together. The rotation force can be easily applied with the operation force of and the stability can be improved.

Further, even when the lift is adjusted, it is not necessary to manually pull out the movable pole, and the fixed cable is simply hung on the wire cable of the lift adjusting mechanism and the winch is operated. Can automatically raise the movable pole to the required height, and since all this operation can be performed on the ground, the operator does not need to get on and off the platform, and the workability of lifting height adjustment is improved. Can be improved.

According to the second aspect of the invention, at the time of turning for loading and unloading, only the boom mechanism rotates around the outer periphery of the movable pole via the tubular bracket, and the movable pole and the fixed pole do not rotate together. The rotation force can be easily applied with the operation force of and the stability can be improved.

Further, even when the lift is adjusted, it is not necessary to manually pull out the movable pole, and the fixed pole is simply hung on the wire cable of the lift adjusting mechanism and the winch is operated. Can automatically raise the movable pole to the required height, and since all this operation can be performed on the ground, the operator does not need to get on and off the platform, and the workability of lifting height adjustment is improved. Can be improved.

Further, since the vertical movement of the case of the lift adjusting mechanism is guided by the guide poles provided upright along the fixed poles, the movable poles can be raised in a more stable state.

[0022]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a usage state of a simple truck crane according to an embodiment of the present invention, and FIG.
Perspective view showing the storage state of the truck simple crane
3 is a cross-sectional view of the support pillar portion in the retracted state, FIG. 4 is a cross-sectional view of the lift adjustment mechanism portion in the retracted state, and FIG.
Perspective view showing the extended state of the truck simple crane
FIG. 6 is a cross-sectional view of the support column portion in the extended state, and FIG. 7 is a cross-sectional view of the lift adjusting mechanism portion in the extended state.

As shown in FIG. 1, this simplified crane 1
Is mounted on the loading platform 3 of the vehicle 2 such as a light truck and is used for loading and unloading the luggage 4. The base 5 to be installed on the loading platform 3 and the pillar body installed upright on the base 5. 6, a boom mechanism 9 in which the winch 7 is arranged in a proper position on the support 6 and a winch 7, and an outrigger 10 that extends from the vehicle 2 and is grounded during loading / unloading work.

The base 5 is composed of a horizontal frame 5a and a vertical frame 5b, which are L-shaped in a plan view, and is provided with seat plates 11 at the corners and both ends thereof. The receiving plate (not shown) arranged on the back surface of the nut 3 is tightened with nuts so as to be installed and fixed to the loading platform 3.

The support column 6 is composed of a fixed pole 14 fixed to the corner portion of the base 5 by a bolt 13 via a fixing plate 12, and a movable pole 15 inserted into the fixed pole 14 so as to be movable up and down. Has become.

The fixed pole 14 has a cylindrical shape, and an insertion hole 17 for the stopper pin 16 is formed near the upper portion. The movable pole 15 has a tubular shape similar to the fixed pole 14, and is deeply inserted into the fixed pole 14 so that the lower end thereof reaches the fixing plate 12, and in the inserted state, matches the insertion hole 17 of the fixed pole 14. A first insertion hole 18 for inserting the stopper pin 16 is formed at an intermediate position in the longitudinal direction.
A second insertion hole 19 that can be aligned with the insertion hole 17 is also formed at the lower position in the longitudinal direction.

Incidentally, the first insertion hole 18 and the second insertion hole 1
You may provide an intermediate insertion hole between 9 and.

Further, a ring-shaped flange 20 is fixed to the movable pole 15 at a position above the first insertion hole 18 so as to contact the upper end of the fixed pole 14, and a ring-shaped flange 21 is also provided at the upper end. Is stuck.

The boom mechanism 9 includes a pair of upper and lower tubular brackets 22, 2 which are rotatably fitted onto the movable pole 15.
3 and a boom main body 25 rotatably supported by the upper tubular bracket 22 and having a roller 24 rotatably provided at the tip thereof.
And the lower tubular bracket 23 and the boom body 25 are pivotally attached at their ends to the telescopic support 2
It consists of 6 and 27. An insertion hole 29 for the pin 28 is formed near the free end of the support 26. The support 27 is slidably inserted into the support 26, and a first insertion hole 30 of the pin 28 that matches the insertion hole 29 of the support 26 in a deeply inserted state is formed, and further, near the free end. Also, a second insertion hole 31 that can be aligned with the insertion hole 29 is formed.

The winch 7 is a reversible motor 32 fixed to the boom body 25 and capable of rotating in the forward and reverse directions.
The wire cable 34 wound around the drum 33 is connected to the output shaft of the second drum 33, and the wire cable 34 is descended via the roller 24 of the boom body 25 and passed through the weight sprocket 35 of an appropriate weight, and then at the end. The hanging metal fitting 36 is connected.

The outrigger 10 has a fixed pole 14
A movable rod 38 slidably inserted into the lateral pipe 37 fixed to the base, a pedestal 39 pivotally attached to the movable rod 38 so as to be up and down, and an extensible screwed to the pedestal 39. The adjusting rod 40 and a ground plate 41 fixed to the lower portion of the adjusting rod 40.

According to the present invention, in the simple type crane having the above-mentioned structure, a lift adjusting mechanism 42 for adjusting the lift of the movable pole 15 is provided, and the lift can be automatically adjusted by using the winch 7. It is characterized by having done.

This lifting height adjustment 42 comprises a support member 43 provided on the fixed pole 14 side and an elevating member 44 provided on the movable pole 15 side.

The supporting member 43 is fixed to the side surface near the upper end of the fixed pole 14. The lifting member 44
Is composed of a vertically long case 45 and a pair of upper and lower pulleys 46 and 47 provided in the case 45.
5 is a movable pole 1 whose upper end is supported by a support fitting 48.
5 is attached to the flange 20. The pulley 46,
47 are rotatably supported by the case 45 via pins 49. One end of the wire cable 50 is locked to the support member 43, and the wire cable 5
0 is hung from the lower pulley 47 to the upper pulley 46,
The other end is pulled out from the upper end opening of the case 45. A hook portion 51 is formed at the other end of the wire cable 50 so that the hanging fitting 36 of the wire cable 34 of the winch 7 can be engaged and disengaged.

At both upper and lower ends of the case 45, wire cables 50 are provided corresponding to the upper and lower pulleys 46 and 47, respectively.
Pins 52 and 53 for preventing the disengagement of the pins are provided.

In the figure, reference numeral 54 is a switch box for forward / reverse operation of a winch.

Next, the usage state and operation of the simplified crane 1 according to the above embodiment will be described.

As shown in FIG. 1, this simple type crane 1 is used by being fixed on a loading platform 3 of a vehicle 2 by a base 5, and in a state in which loads 4 are not loaded and unloaded. 2 and 3, the movable pole 15 is deeply inserted into the fixed pole 14 and the stopper pin 16 is inserted into the aligned first insertion hole 18 and insertion hole 17 so that the movable pole 15 can be inserted. Is integrated with the fixed pole 14. Then, the support 27 is deeply inserted into the support 26, and the pins 28 are inserted into the first insertion hole 30 and the insertion hole 29.
The boom main body 25 is held at a downward angle by inserting, and the hanging metal fitting 36 is locked to the hook hook 60 of the base 5, so that the boom main body 25 is kept in a low and stable posture.

Therefore, the height of the vehicle 2 can be kept low and fixed while the vehicle 2 is traveling.

Next, in the work of stacking and unloading, after stopping the vehicle 2 at the destination, the movable rod 38 of the outrigger 10 is inserted into the lateral pipe of the fixed pole 14 and the pedestal 39 is raised to raise the adjusting rod. Turn 40 to ground the ground plate 41 to the ground. Then support 26, 2
Remove pin 28 of 7 to support 27
The second insertion hole 31 and the insertion hole 2 which are extended and aligned with respect to
The boom main body 15 is set at an obliquely upward working angle by inserting the pin 28 into the boom 9. And the boom mechanism 9
Is rotated around the movable pole 15 via the tubular brackets 22 and 23, and when the hanging metal fitting 36 reaches above the luggage 4, the winch 7 is driven to feed out the wire cable 34, and the hanging metal fitting 36 is loaded. 4 and the winch 7 is driven to wind up the wire cable 34 to lift the load 4 and the boom mechanism 9 may be swung around the movable pole 15. In this stacking work, since the fixed pole 14 and the movable pole 15 do not rotate and the boom mechanism 9 rotates around the movable pole 15 via the tubular brackets 22 and 23, the rotation operation can be easily performed with a slight operation force. It is possible to improve stability which is important for cargo handling work. In addition, the boom body 2 that constitutes the boom mechanism 9
5 and the support 26 are pivotally attached to the movable pole 15 which can be moved up and down via the tubular brackets 22 and 23, so that a large lift can be obtained without extending the movable pole 15.

When the load 4 is tall and the lift is not sufficient in a normal state, first, the stopper pin 16 inserted into the insertion hole 17 and the first insertion hole 18 is removed,
The winch 7 is driven to feed out the wire cable 34, and the hanging metal fitting 36 is hooked on the hook portion 51 of the wire cable 50 of the lifting height adjusting mechanism 42.

Next, when the winch 7 is driven to rewind the wire cable 34, a pulling force acts on the wire cable 50 and pushes up the lower pulley 47 with the support member 43 as a fulcrum. Since the pulley 47 is supported by the case 45, the case 45 is pushed up together with the pulley 47. Further, since the case 45 is attached to the flange 20 of the movable pole 15 via the support fitting 48, the movable pole 15 Starts to rise with respect to the fixed pole 14 which is fixed on the loading platform 3 via the base 5. Then, when a certain amount (for example, 50 cm) is raised, the matching mark 200 of the movable pole 15 can be seen. Therefore, when the matching mark 200 matches the matching mark 201 of the fixed pole 14, the winch 7 is moved.
To stop.

In this state, the stopper pin 16 is inserted into the insertion hole 17
When the movable pole 15 is inserted into the second insertion hole 19, the movable pole 15 is fixed to the fixed pole 14 in a raised state, and the support column 6 is in an extended state. After that, the hanging fitting 36 of the wire cable 34 may be removed from the hook portion 51 of the wire cable 50.
This makes it possible to easily achieve a high head as shown in FIGS.

At the end of the stacking work, first, the hanging fitting 36 of the wire cable 34 is hung on the hook portion 51 of the wire cable 50, and then the winch 7 is driven to pull the wire cable 34 a little, and then the case 45 is inserted. As the movable pole 15 rises slightly with respect to the fixed pole 14 and the stopper pin 16 becomes loose, the insertion hole 17 and the second insertion hole 1
You can easily pull out from 9. The movable pole 15 is now free, and the wire cable 50 locked to the support member 43 is released.
And the wire cable 34 connected to the hook portion 51 of the wire cable 50 by the hanging metal fitting 36. Therefore, when the winch 7 is driven to feed out the wire cable 34, the movable pole 15 is automatically lowered, and the degree of insertion with the fixed pole 14 is increased. Then, when a certain amount of descent is performed, the wire cable 34 is slackened, and the movable pole 15 is at the most descent position. At this position, the first insertion hole 17 and the insertion hole 17 of the fixed pole 14 are aligned with each other. Therefore, by inserting the stopper pin 16 again, the support 6 is shortened again. For this lifting height adjustment work, the hanging metal fitting 36 of the wire cable 34 is hung on the hook portion 51 of the wire cable 50 of the lifting height adjustment mechanism 42, and the switch operation of the winch 7 is performed. 15 can be raised, and further, this work can be performed on the ground without the operator climbing onto the platform 3, so that the workability can be further improved.

8 and 9 are sectional views showing another embodiment of the lift adjusting mechanism 42.

In this embodiment, the guide pole 55 is provided on the fixing plate 12 of the base 5 along the longitudinal direction of the fixed pole 14.
And the guide member 56 is attached to the lower end of the case 45.
The guide pole 55 is provided on the guide member 56.
A through hole 57 is formed so as to pass through.

The guide member 5 provided on the case 45
The through hole 57 of 6 is fitted in the guide pole 55 so as to be vertically movable.

The support member 43 is fixedly mounted on the upper end of the guide pole 55, and one end of the wire cable 50 is locked to the support member 43.
Is hung from a pulley 47 on the lower side to a pulley 46 on the upper side, and the other end is pulled out from the upper end opening of the case 45.

According to this embodiment, since the vertical movement of the case 45 is guided by the guide pole 55, the movable pole 15 can be raised in a more stable state.

[0051]

As is apparent from the above description, according to the invention of claim 1, the height can be kept low during traveling, and a large lift can be taken during loading and unloading. Therefore, the turning operation can be easily performed with a slight operation force during turning, and the stability important for cargo handling work can be improved.

Further, even when the lifting height is adjusted, it is not necessary to manually pull out the movable pole, and the fixed cable is simply hung on the wire cable of the lifting adjustment mechanism and the winch switch is operated. Can automatically raise the movable pole to the required height, and since all this operation can be performed on the ground, the operator does not need to get on and off the platform, and the workability of lifting height adjustment is improved. Can be improved.

According to the second aspect of the present invention, the height can be kept low during traveling, a large lift can be taken during loading and unloading, and it is easy with a slight operating force when turning for loading and unloading. The rotation operation is possible, and the stability important for cargo handling work can be improved.

Further, even in the case of adjusting the lifting height, the troublesome work of pulling out the movable pole by manpower is not required, and the fixed pole is simply hung on the wire cable of the lifting adjustment mechanism and the winch switch is operated. Can automatically raise the movable pole to the required height, and since all this operation can be performed on the ground, the operator does not need to get on and off the platform, and the workability of lifting height adjustment is improved. Can be improved.

Furthermore, since the vertical movement of the case of the lift adjusting mechanism is guided by the guide poles provided upright along the fixed poles, the movable poles can be raised in a more stable state.

[Brief description of drawings]

FIG. 1 is a perspective view showing a usage state of a truck simple crane according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a stored state of the truck simple crane of FIG.

FIG. 3 is a cross-sectional view of a column body portion in a stored state.

FIG. 4 is a cross-sectional view of a lift adjusting mechanism portion in a stored state.

5 is a perspective view showing an extended state of the truck simple crane of FIG. 1. FIG.

FIG. 6 is a cross-sectional view of a column body portion in an extended state.

FIG. 7 is a cross-sectional view of a lift adjusting mechanism portion in an extended state.

FIG. 8 is a cross-sectional view of a lift adjusting mechanism portion in a stored state of another embodiment.

FIG. 9 is a cross-sectional view of a lift adjusting mechanism portion in a stretched state of another embodiment.

FIG. 10 is a perspective view showing a conventional truck simple crane according to a conventional example.

[Explanation of sign]

1 Simple crane 3 loading platform 5 base 6 prop bodies 7 winches 9 Boom mechanism 10 Outrigger 14 fixed pole 15 movable poles 22 Cylindrical bracket 23 Cylindrical bracket 25 Boom body 26 Support 27 Support 34 wire cable 36 hanging bracket 43 Support member 45 cases 46 Pulley 47 Pulley 50 wire cable 51 Hook part 55 Guide pole 56 Guide member 57 through hole

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-229788 (JP, A) Actually open 6-20389 (JP, U) Actually open 61-185782 (JP, U) Actually open 63- 59195 (JP, U) S. 63-41427 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) B66C 23/44 B60P 1/54 B66C 23/48

Claims (2)

(57) [Claims] 1. A base that is installed on a loading platform of a truck, a fixed pole that is erected on the base, and a movable pole that is vertically inserted into the fixed pole and that can be connected and fixed to the fixed pole at at least two high and low portions. A pole, a pair of upper and lower tubular brackets rotatably fitted to the movable pole, a boom main body having a base end pivotally attached to an upper tubular bracket, one end to a lower tubular bracket, and the like. Ends are pivotally attached to the boom body and extendable and retractable, an electric winch mounted on the boom body, a support member fixed to the upper end of the fixed pole, and a pair of top and bottom attached to the movable pole. A case having a rotatable pulley, one end of which is locked to the support member, and a wire cable which is pulled out from an opening at the upper end of the case through a pulley at the lower side to a pulley at the upper side, Serial wire provided on the other end of the cable, the track simplified crane, characterized in that it consists of a hook that the hanger is disengageably engaged in the wire cable of the winch. 2. A base that is installed on a loading platform of a truck, a fixed pole that is erected on the base, and a movable pole that is vertically inserted into the fixed pole and that can be connected and fixed to the fixed pole at at least two high and low portions. A pole, a pair of upper and lower tubular brackets rotatably fitted to the movable pole, a boom main body having a base end pivotally attached to an upper tubular bracket, one end to a lower tubular bracket, and the like. An end that is pivotally attached to the boom main body and is extendable and retractable, an electric winch mounted on the boom main body, a case that is attached to the movable pole and has a pair of upper and lower rotatable pulleys, and the support on the base. A guide pole that is provided along the fixed pole and is inserted into a through hole of a guide member provided in the case to guide the vertical movement of the case, and is fixed to the upper end of the guide pole. Provided on the other end of the wire cable, and a wire cable that is locked to the support member at one end and is pulled out to the outside from the opening at the upper end of the case through the pulley at the lower part and the pulley at the upper part. A simple crane for a truck, comprising a hook portion for releasably engaging a hanging metal fitting of a winch wire cable.