JP4118177B2 - Hoisting tractor - Google Patents

Description

[0001]
【Technical field】
The present invention relates to a manual chain block, and more particularly, to a manual chain block provided with auxiliary power input means.
[0002]
[Background]
Conventionally, manual chain blocks have been frequently used for lifting and lowering heavy objects. This manual chain block includes a chain block main body, an upper hook provided at the upper end of the chain block main body, a load chain hung on a load sheave of the chain block main body, a lower hook provided at the lower end of the load chain, It is composed of a hand chain that is placed in parallel to the chain block body and hung on the handwheel. Is.
[0003]
However, the above-described conventional apparatus requires a large amount of human power at the time of high load operation such as when lifting and lowering heavy objects, and it takes a long time when lifting and lowering heavy objects with a long lifting type. It is difficult to work continuously by one person, and it may be necessary to perform high-speed operation when there is no load.
[0004]
Therefore, as a means for reducing the load on the operator, a power coupling portion is provided in a rotating body that rotates the load sheave of the hoisting traction machine, and the power of the electric driver is coupled to the power coupling portion. Has proposed to drive a hoisting traction machine (Patent Document 1).
[0005]
[Patent Document 1]
Japanese Unexamined Patent Publication No. 2000-211892 (FIG. 1 on page 5)
[0006]
DISCLOSURE OF THE INVENTION
[0007]
[Problems to be solved by the invention]
However, the hoisting machine described in the above-mentioned patent document is only for coupling the electric screwdriver to the driving unit of the hoisting machine when the electric screwdriver is attached to the hoisting machine. Since the means for attaching the to the hoisting machine is not necessarily strong, there is a concern that the electric driver may come off the hoisting machine. In addition, when lifting and lowering heavy objects and when operating with no load, the hoisting tractor is driven at the same speed and cannot be moved at high speed when there is no load. It was not possible to shorten and make the lifting work more efficient. Further, when the hoisting machine is moved up and down at high speed using the external drive means, the brake part of the drive member may overheat.
[0008]
By attaching an auxiliary power unit to a manual chain block, the present invention can be lifted and lowered by power, reducing human load, shortening work time, and having a hand chain. , Providing a hoisting and pulling machine that can also be adjusted for minute lifting movements by manual operation, and can prevent overheating of the brake part of the handwheel when the auxiliary power unit is mounted, The present invention provides a hoisting / retracting machine that can be securely fixed to the hoisting / retracting machine.
[0009]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION The present invention solves the above-described problems, and is a first engaging engagement with a handwheel of a hoisting traction machine, a transmission plate for transmitting power, a transmission plate connected to the transmission plate so as to be able to transmit power, and engaging with a power means. A hoisting tractor including a first input shaft and a second input shaft that is connected to the first input shaft via a speed increasing gear and that is detachably engaged with power means.
[0010]
【The invention's effect】
According to the present invention, when lifting / lowering heavy objects or performing lifting / lowering work for a long time, the power load is attached to the first input shaft, and automatic lifting / lowering by a motor or the like is performed. The work time can be shortened, and when performing no-load lifting work, the power means is attached to the second input shaft, and automatic lifting with a motor or the like is performed to shorten the work time. Work efficiency can be improved, and the connection box with the first and second input shafts can be removably screwed to the handwheel, so that it can be used as a manual chain block alone. The power can be transmitted without being affected by the left / right shift of the drive member during the lifting / lowering operation, and the power unit can be prevented from rotating during the operation of the power unit.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
According to a first aspect of the present invention, a load sheave around which a load chain is wound, a hoisting tractor main body including a handwheel that rotates the load sheave, and the handwheel are engaged with each other. A transmission plate for transmitting the power of the means to the handwheel, a first input shaft that is connected to the transmission plate so as to be able to transmit power, and is detachably engaged with the power means, via a first input shaft and a speed increasing gear When it is a hoisting tractor equipped with a second input shaft that is connected and detachably engages with the power means, and when performing lifting work of heavy objects or continuing lifting work for a long time By attaching the power means to the first input shaft and performing automatic lifting / lowering by a motor or the like, the work load can be reduced and the work time can be shortened. Is installed on the second input shaft. , By performing the automatic lifting by a motor or the like, you can save time, it is possible to perform efficient lifting work, has an action that can provide hoisting and pulling device which can fine elevation adjustment further manual.
[0012]
According to a second aspect of the present invention, the first input shaft, the second input shaft, and the speed increasing gear are mounted on the connection box, and the end of the fixing bolt that fixes the main body frame of the hoisting and pulling machine main body to the connection box. It can be used as a manual hoisting tractor and can be used as a manual hoisting tractor when working in places where it is difficult to supply power means. It is light and has an action that can be easily handled.
[0013]
The invention according to claim 3 is characterized in that the transmission plate and the handwheel are connected by a transmission shaft that is inserted into a fitting hole provided in the handwheel, and is a driving member during the lifting operation. Although the handwheel shifts in the left-right direction, the transmission shaft is slidably inserted into the handwheel, so the engagement between the handwheel and the transmission shaft is not affected, and even if the handwheel moves left and right It has the effect | action which enables motive power transmission from a plate to a drive member.
[0014]
According to a fourth aspect of the present invention, the power means includes a locking piece protruding toward the connection box, and the connection box is provided near the end of the first input shaft and the second input shaft. And a stopper that is provided on the power means. The power means tries to turn with the rotation of the motor when the power means moves up and down. And has a function of preventing by a stopper.
[0015]
The invention according to claim 5, handwheel is provided with a braking surface which abuts the mechanical brake for transmitting the rotation of the handwheel to the drive shaft on the inside, a fitting hole between the braking surface and the wheel groove Ha-end wheel It is characterized by connecting a handwheel and a transmission plate with a transmission shaft that is inserted and inserted into a fitting hole, and the position of the transmission shaft for transmitting power is determined by the wheel groove of the handwheel and the outer diameter part of the brake plate. Since it is between the wheel groove and the wheel groove, it can be a through hole, which is easy to process and can reduce the size and weight of the handwheel.
[Embodiment 1]
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 is an enlarged front view showing a hoisting tractor according to Embodiment 1 of the present invention, FIG. 2 is a side view of the connection box, and FIG. 3 is a state where the connection box of the hoisting machine shown in FIG. 1 is removed. It is an enlarged front view shown. In the figure, reference numeral 1 denotes a chain block main body, which is a hoisting traction machine, comprising a load sheave 2, a drive shaft 3 that drives the load sheave 2, a pair of main body frames 4 that support the load sheave 2 and the drive shaft 3, and a main body frame 4. The fixing bolt 5 that is fixed and the tip passes through the cover 13 of the driving device 9, the load chain 6 wound around the load sheave 2, the upper hook 7 provided at the upper end of the chain block body, and the lower end of the load chain 6 are provided. The lower hook 8 is provided. A drive device 9 drives the drive shaft 3 and is provided on one side of the body frame 4 of the chain block body 1. The drive device 9 includes a hand wheel 10 that is a drive member screwed to the end of the drive shaft 3, a mechanical brake 11 that transmits the rotation of the hand wheel 10 to the drive shaft 3 and prevents the suspended load from dropping, A hand chain 12 wound around the handwheel 10 is provided, and the entire drive device 9 is covered with a cover 13 having an opening 13a having an inner diameter slightly larger than the outer diameter of the transmission plate 16 so that the transmission plate 16 can be inserted. It has been broken. The handwheel 10 includes a wheel groove 10a for wrapping and holding the hand chain 12, a circular brake surface 10b that comes into contact with the brake plate 30, and a fitting hole 10c that passes through the handwheel 10, and includes a drive shaft. 3 is screwed in and out freely. 14 is a power coupling device, which has a transmission plate 16 having a transmission shaft 15 fitted in a fitting hole 10c provided in the handwheel 10, and a transmission plate 16 and a speed increasing gear 19a that are spline-coupled to each other, and power means is fitted at the tip. A first input shaft 18 having a joint portion 17, a second input shaft connected to the first input shaft 18 via a speed increasing gear 19b, splined to the speed increasing gear 19b, and having a power means fitting portion 20 at the tip. 21, the first input shaft 18, the second input shaft 21, and the speed increasing gears 19 a and 19 b are installed in a connection box 22 formed by a pair of frames 22 a and 22 b. The connection box 22 is removably attached to the chain block main body 1 by screwing a connection nut 23 fitted in the connection box 22 to a fixing bolt 5 that penetrates the cover 13 of the drive device 9. . Reference numeral 24 denotes a positioning member provided between the cover 13 and the frame 22 a of the connection box 22, and has a length in contact with the outer end surface of the cover 13 so as to ensure that the connection box 22 is fixed by the connection nut 23. Reference numeral 25 denotes an inverted U-shaped stopper which is provided in the vicinity of the first input shaft and the second input shaft of the frame 22b of the connection box 22 and engages with a locking piece 27 provided on the power means 26 incorporating the motor. Reference numeral 29 denotes a brake receiver that is restricted from moving in the axial direction (leftward direction in FIG. 1) by the stepped portion of the drive shaft 3, and 30 is a brake receiver that is fitted to rotate integrally with the drive shaft 3. A pair of ring-like brake plates 31 that are rotatably mounted on the brake plate 31 includes teeth that engage with claws (not shown) that are pivotally supported on the pawl shaft 32, and are freely rotatable on the brake receiver 29. It is a claw wheel fitted in. 26 is power means, 27 is a locking piece fitted to the inverted U-shaped stopper 25, 28 is a switch, and 37 is power means fitted to the first input shaft 18 or the second input shaft 21 provided in the connection box 22. It is a power transmission part fitted to the joint parts 17 and 20. The power means 26, the locking piece 27, and the power transmission unit 37 constitute a power means.
[0016]
Next, the operation of the hoisting machine of the first embodiment will be described. When the load is lifted and lowered by the chain block, the power transmission unit 37 of the power unit 26 is fitted and attached to the power unit fitting unit 17 of the first input shaft 18, and the power unit 26 is attached to the coupling device 14. The locking piece 27 provided on the power means 26 is fitted into a stopper 25 provided on the connection box 22 to prevent the power means 26 from rotating in the rotation direction of the power means 26. When the switch 28 is turned on and a motor (not shown) is driven, the first input shaft 18 is rotated, and the transmission plate 16 splined to the first input shaft 18 is rotated, via the transmission shaft 15. Then, the handwheel 10 is rotated, and the drive shaft 3 and the load sheave 2 are rotated via the mechanical brake 11 to raise and lower the load.
[0017]
Next, detailed operation of the mechanical brake 11 will be described. When hoisting the load, for example, clockwise rotation is transmitted to the handwheel 10, so that the handwheel 10 is screwed with the drive shaft 3, so that the brake surface 10 b moves forward in the left direction of FIG. 1. Is pressed against the brake plate 30 so that the brake plate 30 and the ratchet wheel 31 are easily tightened. Therefore, the brake plate 29 and the drive shaft rotate together to rotate the load sheave 2 via the speed reducer. Unwind the load. The claw wheel 31 is held so as not to rotate in the direction of lowering the load by engagement with a claw (not shown).
[0018]
On the other hand, when unloading the load, the handwheel 10 is rotated in the direction opposite to the clockwise direction, so that the handwheel 10 moves backward on the drive shaft 3 that is screwed to the right in FIG. The tightening of the surface 10b, the brake plate 30, the claw wheel 31, and the brake receiver 29 is released, and the drive shaft rotates in the winding direction via the load sheave 2 and the speed reducer due to the load, and the handwheel 10 is illustrated by the screw action. 1, the above-described tightening force is generated again, and the descent of the load is stopped. By this repeated operation, the winding is performed.
[0019]
As described above, when the load is lowered, the handwheel 10 is shifted in the left-right direction on the drive shaft that is screwed by the action of the mechanical brake 11, but the transmission plate 16 and the handwheel 10 have a certain length. Since the transmission shaft 15 is slidably fitted in the fitting hole of the handwheel 10 and linked, the transmission shaft 15 slides and absorbs the amount of displacement of the handwheel 10 depending on the length of the shaft. Even if the shift occurs, power transmission between the transmission plate 16 and the handwheel 10 is enabled. Further, since the position of the fitting hole 10c in which the transmission shaft 15 is slidably fitted is between the wheel groove 10a of the handwheel 10 and the brake surface outer diameter portion 10d, the functions of the brake surface 10b and the wheel groove 10a are set. Can be provided at a position that does not affect the handle, and can be a through hole that can be easily processed. When the fitting hole 10c is provided on the opposite side to the brake surface 10b side of the handwheel 10, Although it is necessary to make the thickness thick, in the embodiment of the present invention, the thickness is unnecessary, and the handwheel 10 can be reduced in size and weight. Note that when the vehicle is moved up and down at high speed, such as when there is no load, the power means 26 is fitted and mounted on the power means fitting portion 20 of the second input shaft 21, and the first input is made from the second input shaft 21 via the speed increasing gear 19. The shaft 18 is rotated, and the load is moved up and down at high speed by the same operation as in the above-described embodiment.
[0020]
Further, when the cargo is lifted / lowered only by operating the hand chain 12, the power means 26 is removed from the coupling device 14.
[Embodiment 2]
A second embodiment of the present invention will be described with reference to FIGS.
[0021]
In the following description, the main body portion of the hoisting tow machine is the same as that of the first embodiment except for the handwheel, and the description is omitted.
[0022]
In the present embodiment, an air motor capable of forward and reverse rotation is used as the power means 26.
[0023]
In the figure, reference numeral 33 denotes a support frame that supports the air motor 26 that is a power means, and a connecting portion that is coupled to a connected portion 43 that communicates with a nozzle 41 provided in a connecting box 22 attached to the hoisting and pulling machine body. 42 is provided. 34 is an air supply hose for supplying air to the air motor 26, 35 is an exhaust hose for discharging air exhausted from the air motor 26, and 37 is an air motor 26 through a power shaft 26a, a drive gear 26b, and a driven gear 26c. The power transmission portion that transmits power to the transmission plate 16 is fitted to the power means fitting portions 17 and 20 of the transmission plate 16 to transmit the power to the transmission plate 16.
[0024]
The air motor 26 includes fins that are rotated by compressed air, and the air motor 26 according to the present embodiment includes the air supply hose 34 that includes the two air supply hoses 34a and 34b that rotate the fins in the forward and reverse directions, as described above. An air exhaust hose 35 for exhausting air from the fins is provided.
[0025]
Further, in another air supply form in the power means as shown in FIG. 15, the air supply hoses 34a and 34b have three-way check valves 55a and 55b for controlling the air flow path, respectively, and the air supply hose. Check valves 56a and 56b are provided at the connecting portions of 34a and 34b and the air exhaust hose 35, respectively. The three-way check valve is a valve that closes in one direction among the three-way flow paths.
[0026]
When the air motor 26 is rotated forward, the air is supplied from the air supply hose 34a to the air motor 26 by the three-way check valve 55a, the air motor 26 is rotated forward, and the exhaust air is reversed three-way from the air supply hose 34b. The air is supplied to the air exhaust hose 35 through the stop valve 55b and the check valve 56b.
[0027]
On the other hand, when the air motor 26 is rotated in the reverse direction, air is supplied from the air supply hose 34b to the air motor 26 by the three-way check valve 55b, the air motor 26 is rotated in the reverse direction, and the exhaust air is supplied from the air supply hose 34a. The air is supplied to the air exhaust hose 35 through the three-way check valve 55a and the check valve 56a.
[0028]
The drive gear 26b and the driven gear 26c are bevel gear mechanisms. Reference numeral 38 denotes an L-shaped support bracket provided on the power means support frame 33. The distal end of the L-shaped portion is fitted with a base end portion of a connected portion 43 which is a power means side protruding portion of a nozzle 41 described later. Two mating fitting portions 38a are provided. 39 is provided on the power means support frame 33, is bent in an L shape, and the bent end face is attached to the frame 22b of the connection box 22, and 40 is provided on the power means support frame 33, and the power transmission portion. 37 is a bearing part that pivotally supports 37, 41 is fixed to the frame 22b of the connection box 22, and has an end for exhausting air facing an air supply hole 10e provided in the handwheel 10 to be described later, and an air exhaust hose 35 is a cooling nozzle in communication with 35. The air supply hole 10e is provided on the same arc as the fitting hole 10c into which the transmission shaft 15 is fitted, as shown in FIGS. 7 and 8, on the outer side in the circumferential direction of the brake surface 10b provided on the inner side of the handwheel 10. ing. The air supply hole 10e can be a long hole as shown in FIG. 8, or it can be a round hole as shown in FIG. 7. If the air supply hole 10e is a round hole, the processing is easy, and the air supply hole 10e is shared with the fitting hole 10c. Can be used. The cooling nozzle is fixed to the frame 22b of the connection box 22, and the protruding portion protruding from the frame 22b to the power means side is engaged with the connection portion 42 provided at the end of the air exhaust hose 35, so that the air exhaust This is a connected portion 43 connected to the hose 35. Since the connecting portion 42 and the connected portion 43 form a fluid coupling mechanism (coupler) as shown in FIG. 5, for example, it is suitable as a retaining member that can be easily attached and detached with one touch. This makes it possible to prevent the support bracket 38 from being pulled out.
[0029]
The attachment and operation of the power means device of the present embodiment described above to the hoisting and pulling machine main body will be described.
[0030]
Further, the support bracket 38 has been described with the tip portion being the two-piece fitting portion 38, but a fitting hole for fitting with the connected portion 43 may be provided.
[0031]
The power means supporting frame 33 of the power means device is brought closer to the connection box 22 side, and the power means transmitting portion 37 is fitted to the power means fitting portion 17 or 20 of the input shaft 18 or 21, and at the same time, the air exhaust hose 35 The connecting portion 42 is coupled to the connected portion 43 of the nozzle 41, the support bracket 38 is fitted to the proximal end portion of the connected portion 43 of the nozzle 41, and the power means device is fixed to the connection box 22. Further, the auxiliary bracket 39 is attached to the frame 22b of the connection box 22 to prevent the power means support frame 33 from rotating outward.
[0032]
When the air motor 26 is driven by compressed air supplied from the air supply hose 34, the input shaft 18 or 21 is rotated and transmitted via the power shaft 26a, the drive gear 26b, the driven gear 26c, and the power means transmission unit 37. The handwheel 10 is rotated by the plate 16. On the other hand, the exhaust air exhausted from the air motor 26 is exhausted from the nozzle 41 toward the air supply hole 10e of the handwheel 10 through the air exhaust hose 35 to the outer surface of the handwheel 10 and from the air supply hole 10e. The brake surface 10 of the handwheel 10 is cooled by the discharged air.
[0033]
As described above, the power transmission portion 37 provided in the power means support frame 33 is fitted into the power means fitting portion 17 provided in the connection box 22, and the bifurcated fitting portion 38 a of the support bracket 38 is connected to the connection box 22. The power means support frame 33 is connected by fitting to the base end of the connected portion 43 provided on the air motor 26 side of the fixed nozzle 41 and attaching the auxiliary bracket 39 to the frame 22b of the connection box 22. It is securely attached to the box 22. That is, the power means support frame 33 fits the power transmission portion 37 to the power means fitting portion 17 and fits the support bracket 38 to the base end portion of the connected portion 42 of the nozzle 41, thereby supporting the power means. Since the frame 33 can be prevented from rotating with respect to the connection box, and the auxiliary bracket 39 extending from the power means support frame 33 is attached to the frame 22b of the connection box 22, the power means support frame 38 is provided. Is prevented from rotating and removing from the connection box 22 in the outward direction.
[0034]
Further, as shown in the figure, the bevel gear mechanism is adopted for the drive gear 26b and the driven gear 26c so as to change the power transmission direction by 90 degrees, so that the power means 26 can be provided below the drive gear 26b. Since the width of the apparatus can be reduced, the operation can be performed even in a narrow place.
[0035]
Further, compressed air is used as a power means, and the exhaust air is cooled from the nozzle 41 through the air exhaust hose 35, the outer surface of the hand wheel 10 is cooled, and the air is braked from the air supply hole 10e provided in the hand wheel 10. By supplying to the surface, the brake surface 10b of the handwheel 10 can be cooled.
[0036]
Further, by making the power transmission plate 16 cross-shaped as shown in FIG. 7, the air supply hole 10e provided in the handwheel 10 is not blocked by the transmission plate 16, and therefore the air supply hole 10e has poor air permeability. Therefore, the cooling efficiency of the brake surface can be improved.
[0037]
As shown in FIGS. 7 and 8, the cover 13 has openings 13b for passing the hand chain 12 on both sides of the cover 13, so that oil mist is mixed in the air. In this case, by connecting the connecting portion 42 of the air exhaust hose 35 to the connected portion 43b of the nozzle 41 provided on the opening 56 side, the oil mist mixed air is easily released to the outside, and is supplied to the mechanical brake 11 side. Ingress of air can be prevented, and deterioration of brake performance due to oil mist can be prevented. In this case, the air supply hole 10e is closed.
[Embodiment 3]
The embodiment of the present invention is such that the power means side protruding portion of the nozzle is directly fitted to the power means support frame, and the nozzle engaging means is different from that of the second embodiment, but other configurations are the same. Hereinafter, the present embodiment will be described with reference to FIGS. 9 to 11. In the figure, the nozzle 41 is fixed to the frame 22b of the connection box 22, and the protruding portion from the frame 22b of the nozzle 41 toward the power means 26 is a connected portion 43 that is a hollow protruding shaft, and is a power means. It is inserted into a fitting hole 33a provided in the support frame 33, and has a retaining groove 43c into which a locking body 46 to be described later is fitted at its tip. Further, the end of the connected part 43 is connected to the connection part 42 provided at the end part of the air exhaust hose 35 and connected to the air exhaust hose 35. Further, the end portion of the connected portion 43 is a tapered portion 43d, and when the power means support frame 33 is fitted into the nozzle 41, the fitting hole 33a and the locking body 46 are smoothly guided. One end of the locking body 46 is pivotally supported by a support shaft 47 provided on the power means support frame 33, and an operation lever 48 for opening and closing the locking body 46 is provided at the other end. Further, a spring 50 is wound around the support shaft 47, and an urging force that rotates downward is applied to the locking body 46. Reference numeral 49 denotes a stopper with which the end of the locking body 46 is engaged. 11a and 43b shown in FIG. 11 are connected portions of the nozzle, and 43b is provided on the opening 13b side of the cover 13 as described in the second embodiment, and discharges air mixed with oil mist to the outside. Used to make it easier.
[0038]
In the present embodiment, the connecting portion 43 that is the protruding portion on the power means side of the nozzle 41 is directly engaged with the power means support frame 33, so that the support bracket 38 in the second embodiment is not required, and the power means support frame. 33 can be securely fixed to the connection box 22, and the connected portion 43 and the fitting hole 33 can be removed from each other by engaging the distal end of the connected portion 43 with the engaging body 46. Can be prevented.
[Embodiment 4]
The present embodiment is different from the third embodiment in that the connecting frame and the power means support frame are provided with fixing means for fixing both, but the other configuration is the same as that of the embodiment. Is omitted.
[0039]
Hereinafter, the present embodiment will be described with reference to FIGS. In the figure, 52 is a frame extending from the frame 22b of the connection box 22 to the power means side, and is a retaining member. Reference numeral 53 denotes a pair of frames extending from the power means support frame 33 toward the connection box 22 and sandwiching the retaining member 52, and are locking members. The retaining member 52 has a concave portion 52a at the tip and a narrow width portion 52b that is an end opening of the concave portion, and the locking member 53 is slidably supported by the frame 52 and has a large diameter that is the same as the concave portion 52a. The locking pin 54 has a small diameter portion 54b having the same diameter as the portion 54a and the narrow width portion 52b. When attaching the power means support frame 33 to the connection box 22, the small diameter portion 54 b of the retaining pin 54 is set between the frames of the locking member 53, and the locking member 53 is removed from the narrow width portion 52 b of the retaining member 52. The power means support frame 33 can be securely and firmly fixed to the connection box 22 by pushing into the recess 52a, sliding the locking pin 54, and fitting the large diameter portion 54a into the recess 52a. .
[Brief description of the drawings]
FIG. 1 is a front view showing a hoisting tractor according to Embodiment 1 of the present invention.
FIG. 2 is a side view of a frame portion of the connection box of FIG.
3 is an enlarged front view showing a state in which the connection box of FIG. 1 is removed. FIG.
FIG. 4 is a front view showing a hoisting tractor according to Embodiment 2 of the present invention.
FIG. 5A is an enlarged side view of the connection box of FIG. (B) is an enlarged view which shows the connection part of a nozzle and an air exhaust hose.
6 is a front view showing a state in which the support frame of FIG. 4 is separated. FIG.
7 is a side view showing the handwheel and the transmission plate of FIG. 4; FIG.
8 is a side view showing another embodiment of FIG. 7. FIG.
FIG. 9 is a front view showing a hoisting tow machine according to a third embodiment of the present invention.
10 is a front view showing a state in which the support frame of FIG. 9 is separated. FIG.
11 is an enlarged side view of the connection box of FIG. 9;
FIG. 12 is a front view showing a hoisting tow machine according to a fourth embodiment of the present invention.
13 is a front view showing a state in which the support frame of FIG. 12 is separated.
14 is an enlarged side view of the connection box of FIG. 13;
FIG. 15 is an enlarged front view showing another form of air supply in the power means.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Chain block main body 2 Load sheave 3 Drive shaft 4 Main body frame 5 Fixing bolt 6 Load chain 7 Upper hook 8 Lower hook 9 Drive device 10 Hand wheel 10a Wheel groove 10b Brake surface 10c Fitting hole 10d Brake surface outer diameter portion 10e Air supply Hole 11 Mechanical brake 12 Hand chain 13 Cover 13a Cover opening 13b Opening (hand chain opening)
14 connection device 15 transmission shaft 16 transmission plate 17 power means fitting portion 18 first input shafts 19a, 19b speed increasing gear 20 power means fitting portion 21 second input shaft 22 connection box 22a frame 22b frame 23 connection nut 24 positioning member 25 Stopper 26 Power means 26a Power shaft 26b Drive gear 26c Drive gear 27 Locking piece 28 Switch 29 Brake receiver 30 Brake plate 31 Claw wheel 32 Claw shaft 33 Power means support frame 33a Fitting hole 34 Air supply hose 35 Air exhaust hose 37 Power transmission part 38 Support bracket 38a Bifurcated fitting part 39 Auxiliary bracket 40 Bearing part 41 Nozzle 42 Connection part 43, 43a, 43b Connected part 43c Retaining groove 43d Taper part 45 Locking frame 46 Locking body 47 Support shaft 48 Operation lever 49 Stopper 50 Spring 1 rib 52 retaining member 52a recess 52b narrow portion 53 engaging member 54 the locking pin 54a large diameter portion 54b small-diameter portion 55a, 55b three-way check valve 56a, 56b check valve

Claims (5)

  A load sheave around which a load chain is wound, a hoisting tractor body comprising a handwheel for rotating the load sheave, a transmission plate that engages with the handwheel and transmits the power of the power means to the handwheel; The first input shaft is connected to the transmission plate so as to be able to transmit power, and is detachably engaged with the power means. The first input shaft is connected to the power input means via the speed increasing gear, and is detachably engaged with the power means. A hoisting traction machine comprising a second input shaft.   The first input shaft, the second input shaft, and the speed increasing gear are attached to the connection box, and the connection box is removably screwed to the end of the fixing bolt that fixes the main body frame of the hoisting and pulling machine body. The hoisting tractor according to claim 1, wherein   The hoisting and pulling machine according to claim 1 or 2, wherein the transmission plate and the handwheel are connected by a transmission shaft that is inserted into a fitting hole provided in the handwheel.   The power means has a locking piece protruding to the connection box side, and the connection box has a stopper for fitting the locking piece in the vicinity of the end portions of the first input shaft and the second input shaft. The hoisting towing machine according to any one of claims 1 to 3. Handwheel is provided with a braking surface which abuts the mechanical brake for transmitting the rotation of the handwheel to the drive shaft on the inside, a fitting hole provided between the braking surface and the wheel groove Ha-end wheel, fitted to the fitting hole that in Den Itarujiku, hoisting and pulling device according to claim 1 or 3, wherein the connecting the hand wheel and the transmission plate.

Images