JP2610223B2 - Electric chain block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric chain block used for lifting and lowering luggage and towing luggage.

[0002]

2. Description of the Related Art Conventionally, as a motor-driven chain block, a single type block is often used in which a hook is connected to a load side of a load chain which is hung on a load sheave, and a load is lifted and lowered through the hook. However, in addition, a road extending halfway from the play wheel of the bottom hook body having a hook and a play wheel around the road side of the load chain mounted on the load sheave. The free end side of the chain is fixed to the chain block main body side, and the rotation of the load sheave causes the hook main body to move up and down while rotating the idler through the load chain. There is also known a double type in which lifting and lowering operations are performed.

In the double-type electric chain block, when the free end of the load chain is fixed, conventionally, a chain link located on the free end of the load chain is fixed to the chain block main body by a fixing bolt. Or fixed via a fixing bolt to a suspension member attached to the chain block body,
Alternatively, a stopper made of a separate member is fixed to the chain block main body, and the free end side of the load chain is fixed to this stopper by bolts or pins.

[0004]

However, according to the fixing method in which the free end of the load chain is fixed as described above, the free end of the load chain is attached to the chain block body or the suspension member. In the case of directly fixing with a fixing bolt, a fixing bolt is required in any case, and it is necessary to open a bolt hole for fixing the fixing bolt in the chain block main body or the suspension member. Also, when the free end side of the load chain is fixed to the chain block main body via a stopper, these stoppers, fixing bolts or fixing pins are separately required, so that the number of parts is increased and the structure is increased. It is complicated and has a problem that sufficient strength cannot be obtained. Moreover, when the free end of the load chain is fixed to the chain block body via a stopper, the stopper is fixed to the chain block body, and the free end of the load chain is fixed to the stopper. Even if the free end side of the load chain is directly fixed to the chain block main body or the suspension member with a fixing bolt, the fixing bolt is inserted through the chain link of the load chain. In this state, it is necessary to insert and fix the fixing bolt into a bolt hole provided in the chain block main body or the suspension member, and therefore, in any case, when the load chain is fixed to the chain block main body side, There was also a problem with the workability of fixing.

The present invention relates to an electric chain block,
A motor side case and a gear side case are provided inside a motor case housing a motor and a gear case housing a reduction gear mechanism, and a load sheave is supported and supported between these cases. The motor-side case and the gear-side case were invented by paying attention to the fact that the load sheave is fitted in the center portion in the longitudinal direction of the load sheave, and the divided end faces of these cases are subjected to simple processing. Thereby, while simplifying the structure, the free end side of the load chain can be easily and reliably fixed to the divided end faces of the respective cases, the number of parts is small, and the workability of fixing the load chain is improved. With the goal.

[0006]

In order to achieve the above object, the invention according to claim 1 comprises a motor case 2 containing a motor 1 and a gear case 4 containing a reduction gear mechanism 3.
An electric chain block that includes a motor-side case 5 and a gear-side case 6, and that supports the load sheave 9 on the motor-side case 5 and the gear-side case 6 and supports the suspension member 7. Locking surfaces 52 and 62 for receiving the ends of the load chain 8 hooked on the load sheave 9 at opposite end surfaces of the motor side case 5 and the gear side case 6 and locking the chain link 81 at the ends. That is, the hooking recesses 51 and 61 having the following are provided.

Further, according to the present invention, locking surfaces 52, 62 for locking the first chain link 81a at the end of the load chain in the locking recesses 51, 61, and the first chain link. 81a, the first chain link 81a
And the fitting portions 54 and 64 for receiving the second chain link 81b located in the direction orthogonal to the above.

Further, according to the third aspect of the present invention, the engaging concave portions 51, 61 are provided in front of the engaging concave portions 51, 61 in the concave direction.
1 and engages with the chain link 81 fitted to the lock member 1 to prevent the retaining recesses 17 and 61 from being detached outward from the engaging concave portions 51 and 61.
The motor-side case 5 and the gear-side case 6 were inserted from one side into the other.

According to a fourth aspect of the present invention, the second shaft hole 72 is provided on the load side tangent of the load sheave 9 at the end face of the motor side case 5 and the gear side case 6.
A first shaft hole 71 is provided between the fixed end and the center of the load between the second shaft hole 72 and the fixed end of the load chain 8 which is locked by the engaging recesses 51 and 61, First and second shaft bodies 7 inserted into these first and second shaft holes 71 and 72.
The suspension member 7 was fixed by 3,74.

[0010]

According to the first aspect of the present invention, when the end of the load chain 8 hung on the load sheave 9 is fixed, the chain link 81 located at the end is connected to the motor side case 5 and the gear. Each of the locking recesses 51 and 61 is inserted into a corresponding one of the locking recesses 51 and 61 provided on the end face of the side case 6.
By locking the chain link 81 to the locking surfaces 52, 62, the end side of the load chain 8 can be fixed and supported simply and reliably through the respective locking recesses 51, 61. The workability of the fixing can be improved. Further, when the load chain 8 is locked to the locking surfaces 52 and 62 as described above, the load chain 8 is not limited by the weight of the load chain 8 itself or by the external load applied to the load chain 8. The chain link 81 is engaged with the engaging surfaces 52 and 62 in a press-contact manner, and the engaging surfaces 52 and 62 are
6 and the rigidity thereof can be increased, so that the support strength of the load chain 8 can be enhanced. That is, the chain link 81 is connected to each of the locking surfaces 5.
Since the support chains 2 and 62 can be pressed into contact with each other, the support strength of the load chain 8 can be enhanced, and the load chain 8 can be securely and firmly fixed to each of the engaging recesses 51 and 61. is there. In addition, each of the retaining recesses 5
1 and 61 are formed on the opposite end faces of the motor side case 5 and the gear side case 6, so that these cases 5, 6
Can be formed simultaneously at the time of manufacture due to the casting, the more easily form the respective locking recesses 51 and 61, moreover, by simply Komu fitting the end portion of the load chain 8 in the respective locking recesses 51 and 61 Can be fixed, so the workability of assembling can be improved compared to the case of fixing with fixing bolts, etc. as in the past, and since there is no need for fixing bolts, the number of parts is reduced and the structure is simplified. You can do it.

According to the second aspect of the present invention, locking surfaces 52, 62 for locking the first chain link 81a at the end of the load chain to the locking recesses 51, 61, Since the fitting portions 54 and 64 are provided adjacent to the chain link 81a and receive the second chain link 81b positioned in a direction orthogonal to the first chain link 81a, the first engaging portions 51 and 61 have the first Not only the chain link 81a but also the second chain link 81b is fitted, so that the locking surfaces 52, 62 are provided above the lower ends of the locking recesses 51, 61 so that the locking surfaces 52, 62 are provided. Therefore, the strength of the load chain 8 can be more securely fixed on the end side of the load chain 8.

Further, according to the third aspect of the present invention, the chain link 81 fitted to the hooking recesses 51, 61 is engaged with the front of the hooking recesses 51, 61 in the recessed direction. Since the retaining body 17 for preventing the retaining recesses 51 and 61 from being detached outward is attached to one of the motor-side case 5 and the gear-side case 6 from one side to the other, the chain link is provided by the retaining body 17. 81 can be prevented from slipping out of the hooking recesses 51, 61 outward, and the end of the load chain 8 can be securely fixed to the hooking recesses 51, 61.

According to a fourth aspect of the present invention, the ends of the load chain 8 are locked and fixed by the engaging recesses 51 and 61 provided on the end surfaces of the motor side case 5 and the gear side case 6 facing each other. by the be those the fixed end of the load chain 8 utilizing the invention the load side tangent to approach claim 1, wherein said load sheave 9, the on-load side tangent line of the load sheave 9 2 Along with providing the shaft hole 72,
A first shaft hole 71 is provided between the load center portion between the load side tangent and the fixed end portion and the fixed end portion, and the first and second shaft holes 71 are provided.
Since the suspension members 7 are fixed by the shafts 73 and 74, the cases 5 and 6 can be shared as a so-called single type using the load chain 8 as a single type and a so-called double type using the load chain 8 as a single type. In the above, the fixing shaft of the suspension member in the double type is attached using the second shaft hole 72 that supports the suspension member,
It is possible to prevent the suspension member from falling down.

That is, since the ends of the load chain 8 are locked and fixed by the engaging concave portions 51 and 61, the tangential position of the load sheave 9 and the position of the fixed end of the load chain 8 can be brought close to each other. Therefore, even if the second shaft hole 72 is provided on the tangent to the load sheave 9 , the distance from the first shaft hole 71 can be reduced. As a result, while the double type suspension member can be fixed at two places, The suspension member of the type can be supported by the second shaft hole 72, and the case 5,
6 can be shared.

The first shaft hole 71 is preferably provided at the center of the load, but the center of the hanging member, in other words, the hanging member mainly composed of a hook is supported by a supporting member such as a hanging chain. If it can be fixed so that the center of hanging when hanging on the center of the load is located at the center of the load, the center of the load and the fixed end of the load chain 8 may be used. Further, the A load center, that the load acting central portion in the load side of the double type, which means the center of the idler of lower hook.

[0016]

The electric chain block shown in FIG. 5 is provided with a motor case 2 containing a motor 1 on one side and a gear case 4 containing a reduction gear mechanism 3 on the other side. A motor-side case 5 and a gear-side case 6 are provided at positions inside the gear case 4 and a suspension member 7 comprising an upper hook, respectively, at the upper end of the facing end surfaces of the cases 5 and 6. At the same time, a load sheave 9 around which a load chain 8 is hung is supported by bearings at the center of each of the cases 5 and 6. The other end of the drive shaft 10 is connected to the shaft 1a, and the other end of the drive shaft 10 extends toward the gear case 4 so that the drive shaft 10 supported in the gear case 4 is loosely inserted. Be composed A first gear 31 is formed inside the gear case 4 and is transmitted to the final gear (for example, a fourth gear) 32 which meshes with the first gear 31 and is connected to a sheave shaft. A plurality of intermediate gears (not shown) are provided. A guide member (shown in the drawing) having a guide groove through which a chain link 81 of the load chain 8 is inserted is provided at a lower end of the load sheave 9 at an end face of the motor-side case 5 and the gear-side case 6. And the chain link 81 is correctly engaged with the link engagement groove formed in the outer peripheral portion of the load sheave 9 while correcting the posture of the chain link 81 via the guide member. I'm trying to get. It should be noted that a mechanical brake, an overload prevention mechanism, and the like are disposed inside the gear case 4 together with the reduction gear mechanism 3.

As shown in FIG. 6, the middle of the load chain 8 hung on the load sheave 9 on the load side is formed by the play of the bottom hook body 12 having the hook 12a and the idle wheel 12b. The free end side of the load chain 8 extending around the wheel 12b and extending from the idle wheel 12b is fixed to the chain block body side, and the motor 1 is driven via the drive shaft 10 and the reduction gear mechanism 3. To rotate the idle sheave 12b through the load chain 8 while rotating the load sheave 9 so that the hook body 1 is rotated.
2 of the hook body 12,
The work of lifting and lowering the luggage is performed via a. Further, on the outside of the gear case 4 electrical component box 1
3, the motor 1 is driven forward and reverse by operating the electrical equipment housed in the box 13 with an operation button 14a provided in the operation box 14.

FIGS. 1 and 2 show the electric chain block constructed as described above, wherein the load chain 8 extending from the idle wheel 12b of the hook body 12 is provided.
In fixing the free end side to the chain block main body, that is, the chain block main body composed of the motor side case 5 and the gear side case 6, the following configuration is adopted.
That is, a chain link 81 located on the free end side of the load chain 8 is received at one end of each of the cases 5 and 6 at the end face of the motor side case 5 and the gear side case 6. A pair of enabled recesses 51, 61 are formed to face each other, and these respective recesses 51, 61 are formed.
Then, arc-shaped locking surfaces 52 and 62 for locking the lower side of the chain link 81 are formed.

More specifically, FIG. 1 is a view of the end face of the motor-side case 5 as viewed from the side, and FIG. 2 is a view showing the formation of the respective locking recesses of the motor-side case 5 and the gear-side case 6. The parts are viewed from the front, respectively, and as is apparent from these figures, the engaging recesses 51, 61 are provided on the opposed end surfaces (butting surfaces) of the motor-side and gear-side cases 5, 6, respectively. Are respectively formed, and these engaging concave portions 51 and 61 shown in FIGS.
Of the chain links 81 located at the free ends of the first chain link 81a, ie, the first chain link 81a located at the most free end, and the second chain link connected adjacent to the first chain link 81a in a direction orthogonal to the first chain link 81a. 81b, a third chain link 81c connected adjacent to the second chain link 81b in the same direction as the first chain link 81a, and a third chain link 81c.
Fourth chain link 81 connected to chain link 81c
d so that a chain link with a part of it can be inserted,
The first fitting portions 53 and 63 for receiving the first chain link 81a are provided in the upper portion, and the locking surfaces 52 and 62 for locking the lower portion of the first chain link 81a are formed in the lower portion. is there.

The locking surfaces 52, 62 end short of the opposing end surfaces of the cases 5, 6, and the second chain link 81b is provided between the opposing surfaces of the locking surfaces 52, 62. The insertion portion 15 through which the second chain link 81b is inserted is formed at the back of the insertion portion 15 so as to be continuous with the opposing surfaces of the locking surfaces 52 and 62 and receive the rear portion of the second chain link 81b. Fitting portions 54 and 64 are provided, and the first and third chain links 81 are provided below the insertion portion 15.
a third fitting portion 55 that receives the third chain link 81c at a distance slightly smaller than the outer distance between the first and second chain links 81a and 81c;
65, and below the third fitting portions 55, 65, fourth fitting portions 56, 66 for receiving the upper half of the fourth chain link 81d are provided.

The opposed end faces of the cases 5 and 6 are butted and connected as shown in FIG. 2 so that the first fitting portions 53 and 63 and the third fitting portions 55 and 65 ,
A fitting portion having an elliptical shape substantially the same as the outer shape of the first and third chain links 81a and 81c can be formed,
Between the second fitting portions 54 and 64 and the fourth fitting portions 56 and 66, a fitting portion having a semi-elliptical shape substantially the same as the outer shape of the back surface of the second and fourth chain links 81b and 81d is provided. The first fitting portion 53 can be formed simply by fitting the four free ends of the load chain 8 to the fitting portions.
63, the first chain link 8
1a can be locked and fixed so that the load acting on the free end side can be received.

In the embodiment shown in FIGS. 1 and 2, between the motor side case 5 and the gear side case 6, the third fitting portions 55 and 65 penetrate and the third chain link is provided. 8
1c, the second and fourth chain links 81b,
A stopper 17 is inserted and fixed to prevent the chain link 81 that intervenes between 81d and fits into the fitting portion from being detached outward from the fitting portion.

More specifically, the motor-side case 5 is provided with a stepped portion on the opposite end face side to provide a retaining body insertion hole 57 which is opened to the outside, and the gear-side case 6 is provided.
Is provided with a screw hole 67, and a screwed stopper 17 inserted through the insertion hole 57 is passed through a fitting portion including the third fitting portions 55 and 65, and the screw portion is screwed into the screw hole 67. It is attached by wearing.

Accordingly, the load chains 8 having the chain links fitted to the fitting portions by the attachment of the retaining members 17 are described.
The free end side is prevented from being detached from the fitting portion, and can be prevented from being removed with a simple configuration.

The retaining member 17 is connected to the third fitting portion 5.
5 and 65, the lower part of the second chain link 81b intervening with the outer surface of the lower part of the second chain link 81b. Although it is possible to receive the load (load) acting on the free end side of the load chain 8, it is not particularly necessary because the load is received by the locking surfaces 52 and 62. Further, the retaining body 17 may be inserted from the gear side case 6 to the motor side case 5. In FIG. 1, reference numeral 18 denotes a fixing bolt for integrally connecting the motor side case 5 and the gear side case 6.

Next, the operation of the above configuration will be described. The hook 1 is wound around the load sheave 9 and
The free end side of the load chain 8 extending from the second idle wheel 12b is connected to the four links of the first chain link 81a to the fourth chain link 81d by the end faces of the motor side case 5 and the gear side case 6 facing each other. The first to fourth fitting portions provided in the first to fourth fitting portions are respectively inserted from the outer sides of the respective cases 5 and 6, and the lower circular arc portion of the first chain link 81a is connected to the respective first fitting portions 53. , 63 provided on each locking surface 5
2 and 62, and the chain link 81a
After the insertion of ~ 81d, the stopper 17 is inserted and fixed.

As described above, the first of the load chains 8
By locking the chain link 81a before Symbol locking surfaces 52 and 62, the free end of the load chain 8 by utilizing the opposite end face b of the motor-side casing 5 and the gear-side casing 6 engaging And therefore the road chain 8
When the free end side is fixed to the chain block body, it is assembled simply by inserting the load chain 8, so that the assembling workability can be improved. Further, as described above, the first chain link 81a is connected to the locking surface 52,
When engaged in 62, the weight of the load chain 8 itself, also by an external load applied to the load chain 8, wherein the first chain link 81a of the respective <br/> locking surface 52 and 62 And the locking surfaces 52 and 62 are provided on the respective cases 5 and 6. Since the rigidity thereof can be increased, the supporting strength thereof can be strengthened. is there. That is, the first chain link 81a to be able to be locked in the pressed shape to the locking surfaces 52 and 62, there as it can enhance the support strength of the first chain link 81a, the concave latching portions 51,
The free end side of the load chain 8 can be securely and firmly fixed to 61. In addition, the retaining recess 5
Since 1, 61 are formed on the opposite end face a of the motor side case 5 and the gear side case 6, they can be formed at the same time when the cases 5, 6 are manufactured by casting or the like.
The first chain link 81a can be easily locked simply by being inserted into the locking recesses 51 and 61, so that a separate fixing bolt or the like is not required unlike the related art. In addition, the number of parts is reduced, the structure is simple, and the assembling workability can be improved.

In the above-described embodiment, the retaining member 17 prevents the load chain 8 from being removed from the engaging concave portions 51, 61. In this manner, the cases 5, 6 are fixed to the fixing bolts. Although the free end of the load chain 8 can be fixed even after the connection at 18, the first fitting portions 53 and 63 and the third fitting portions 55 and 6 can be fixed.
A retaining piece that overlaps with each chain link may be provided outside the chain link fitting portion in one or both of the five . In this case, after the cases 5 and 6 are combined, the load chain 8
Can not be fixed on the free end side of
By interposing the free end of the load chain 8 so as to sandwich it when the connection 6 is connected, the load chain 8 can be fitted to the fitting portion, and can be fixed by the engaging concave portions 51 and 61.

The suspension member 7 mounted on the upper side between the motor side case 5 and the gear side case 6 is shown in FIGS.
As shown in the figure, a substantially rectangular mounting leg 7a is provided on the base side.
Are formed integrally, and bulging portions 5a and 6a protruding upward are respectively provided on the upper side of the facing end surfaces of the cases 5 and 6 so as to face each other, and the bulging portions 5a and 6a are formed.
While forming the mounting space of the leg portion 7a between the second shaft hole 72 on the load side tangentially of said load sheave 9, also this second shaft hole 72, prior to the due KiKake stop recesses 51 and 61 At the center of the load between the fixed end of the load chain 8 and the first shaft hole 71 whose diameter is increased by the second shaft hole 72, a first shaft hole 71 having a large diameter is formed in the first shaft hole 71. The hanging member 7 is supported by inserting a shaft 73, and the small-diameter second shaft 74 is inserted into the second shaft hole 72 so that the hanging member 7 is not rotated.

Therefore, with the above configuration, a single-type suspension member can be supported by using the second shaft hole 72, and a double-type suspension member can be supported by using the second shaft hole 72. Of the hanging member can be fixed,
The above cases 5 and 6 can be shared. That is, since the end portions of the load chain 8 are locked and fixed by the hooking concave portions 51 and 61, the tangential position of the load sheave 9 and the position of the fixed end portion of the load chain 8 can be brought close to each other. Even if the second shaft hole 72 is provided on the tangent line of the load sheave 9 , the space between the second shaft hole 72 and the first shaft hole 71 can be reduced. As a result, while the double type suspension member can be fixed at two places, the single type The suspension member is connected to the second shaft hole 7.
2, and the cases 5 and 6 can be shared.

The first and second shaft holes 71, 72
Are formed such that the bulging portion 5a side of the motor side case 5 is open to the outside and the bulging portion 6a side of the gear side case 6 is formed in a blind shape. 71,72
The first and second shaft bodies 73 and 74 are inserted with the leg portions 7a interposed therebetween, and the shaft holes 71 and 72 are inserted into the motor-side case 5 outside the bulging portion 5a. The first and second shaft bodies 73 and 74 are prevented from being pulled out from the shaft holes 71 and 72 by fixing a stopper plate 75 for closing the open side of the shaft members with fixing bolts 76.

Further, between the bulging portions 5a and 6a, on the opposite side of the second shaft 74 with the first shaft 73 as the center, the inner side of the gear side case 5 from the stop plate 75. A knock pin 77 protruding from the side is provided so that the stop plate 75 can be positioned. In addition, a mounting step 5b is provided at an outer peripheral portion at an outer end of the motor-side case 5, and a mounting surface 5c having a flat outer surface is provided radially inward of the step 5b. When a three-phase motor case 4a containing a three-phase motor is mounted as the motor case 2 provided on the outer end side of the side case 5, as shown by a solid line in FIG.
a is inserted into the mounting step 5b provided on the motor side case 5 so that the motor case 4a and the motor side case 5
When a single-phase motor case 4b in which a single-phase motor is mounted is mounted, as shown by a virtual line in FIG. 4, the mounting formed on the motor case 4b is performed. > the flange has to be bolted to the mounting surface 5c, by thus, the said motor-side casing 5
The motor-side case 5 can be shared regardless of whether the three-phase motor case 4a or the single-phase motor case 4b is mounted as the motor case 4 provided on the outer end side of the motor case.

In the embodiment shown in FIGS. 1 to 4, the first shaft hole 71 is provided at the center of the load.
The shaft hole 71 may be provided at the position of the fixed end of the load chain 8 as shown in FIGS. 7 and 8, specifically, at the position where the fixed end is extended upward. As long as the lower center can be fixed so as to be located at the center of the load, the center may be between the center of the load and the fixed end of the load chain 8.

When the first shaft hole 71 is provided at the fixed end of the load chain 8 as shown in FIG. 7, the stopper plate 75 extends outside as shown in FIG. The shaft holes 71 and 72 are provided so as to close the open side.

[0035]

As described above, according to the first aspect of the present invention, the motor case 2 housing the motor 1, the gear case 4 housing the reduction gear mechanism 3, the motor side case 5, and the gear side A motor-driven chain block that supports a suspension member 7 while supporting a load sheave 9 between the motor-side case 5 and the gear-side case 6. The receiving recesses 51, 61 having receiving surfaces 52, 62 for receiving an end of the load chain 8 hooked on the load sheave 9 on the end surface facing the load sheave 9 and locking the chain link 81 at the end. When the end of the load chain 8 hooked on the load sheave 9 is fixed, the chain link 81 located at the end is inserted into the hooking recesses 51 and 61, and the Recesses 51, 6 By locking the chain link 81 in the locking surface 52 and 62 of the respective engaging recesses 5
The end side of the load chain 8 can be fixed and supported simply and surely via the first and the 61, so that the assembling workability can be improved. Particularly, when the load chain 8 is locked as described above, the chain link 81 is locked by the weight of the load chain 8 itself and also by an external load applied to the load chain 8. The surfaces 52 and 62 are pressed against each other, and the locking surfaces 52 and 62 are provided on each of the cases 5 and 6. Since the rigidity thereof can be increased, the load chains 8 The support strength can be strengthened. In other words, since the chain link 81 can be engaged with the engaging surfaces 52, 62 in a press-contact manner, the supporting strength of the load chain 8 with respect to the engaging recesses 51, 61 can be enhanced. The load chain 8 can be securely and firmly fixed to each of the engaging recesses 51, 61. In addition, since the latching recesses 51 and 61 are formed on the end faces of the motor-side case 5 and the gear-side case 6, they can be formed at the same time when the cases 5 and 6 are manufactured by casting or the like. Thus, each of the hooking recesses 51 and 61 can be easily formed, and the load chain 8 is provided in each of the hooking recesses 51 and 61.
It can be easily fixed simply by inserting the end side of
Compared to the conventional case of fixing with fixing bolts, the assembling workability can be improved, and since no fixing bolt is required, the number of parts can be reduced and the structure can be simplified. .

Further, according to the second aspect of the invention, the concave latching portions 51 and 61, and the locking surface 52 and 62 for locking the first chain link 81a of the load chain ends,
A second chain link 81 adjacent to the first chain link 81a and located in a direction orthogonal to the first chain link 81a.
b, the fitting portions 54 and 64 are provided, so that not only the first chain link 81a but also the second chain link 81b can be fitted into the latching recesses 51 and 61, and the engagement amount is reduced accordingly. The stop surfaces 52, 62
61 is provided above the lower end of the locking surface 52, 6.
2 can be improved, so that the end side of the load chain 8 can be more firmly fixed and supported.

Further, according to the third aspect of the present invention, the chain link 81 fitted into the hooking recesses 51, 61 is engaged with the front of the hooking recesses 51, 61 in the recessed direction. Since the retaining body 17 for preventing the retaining recesses 51 and 61 from coming off outward is attached to one of the motor-side case 5 and the gear-side case 6 from one side to the other, the retaining body 1 is provided.
7, the chain link 81 is connected to the engaging recesses 51,6.
1 can be prevented from coming out to the outside, and the end of the load chain 8 can be securely fixed to the engaging recesses 51 , 61 .

According to a fourth aspect of the present invention, the ends of the load chain 8 are locked and fixed by the engaging concave portions 51 and 61 provided on the end surfaces of the motor side case 5 and the gear side case 6 facing each other. by the be those the fixed end of the load chain 8 utilizing the invention the load side tangent to approach claim 1, wherein said load sheave 9, the on-load side tangent line of the load sheave 9 2 Along with providing the shaft hole 72,
A first shaft hole 71 is provided between the load center portion between the load side tangent and the fixed end portion and the fixed end portion, and the first and second shaft holes 71 are provided.
Since the suspension members 7 are fixed by the shafts 73 and 74, the cases 5 and 6 can be shared as a so-called single type using the load chain 8 as a single type and a so-called double type using the load chain 8 as a single type. In the above, the fixing shaft of the suspension member in the double type is attached using the second shaft hole 72 that supports the suspension member,
It is possible to prevent the suspension member from falling down.

That is, since the ends of the load chain 8 are locked and fixed by the engaging concave portions 51 and 61, the tangential position of the load sheave 9 and the position of the fixed end of the load chain 8 can be brought close to each other. Therefore, even if the second shaft hole 72 is provided on the tangent to the load sheave 9 , the distance from the first shaft hole 71 can be reduced. As a result, while the double type suspension member can be fixed at two places, The suspension member of the type can be supported by the second shaft hole 72, and the case 5,
6 can be shared.

[Brief description of the drawings]

FIG. 1 is an end view of a motor-side case to which a suspension member according to an embodiment of the present invention is attached.

FIG. 2 is a front view showing a portion where each locking recess is formed on the motor side case and the gear side case.

FIG. 3 is a partial side view showing a mounting portion of a suspension member.

FIG. 4 is a longitudinal sectional view of the attachment portion.

FIG. 5 is a partially cutaway front view of the electric chain block.

FIG. 6 is a side view thereof.

FIG. 7 is an end view corresponding to FIG. 1 showing a second embodiment.

FIG. 8 is a partial side view corresponding to FIG. 3 of the second embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 motor 2 motor case 3 reduction gear mechanism 4 gear case 5 motor-side case 6 gear-side case 7 suspension member 8 load chain 9 load sheave 17 retaining member 51, 61 latching recess 52, 62 locking surface 71 first shaft hole 72 Second shaft hole 73 First shaft body 74 Second shaft body 81 Chain link 81a First chain link 81b Second chain link

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Toshiyuki Morie 2-180 Iwamuro, Sayama-shi, Osaka, Japan Zojirushi Chain Block Co., Ltd. (56) References JP-B-63-53119 (JP, B2) −41032 (JP, Y2)

Claims (4)

(57) [Claims] 1. A motor case (2) containing a motor (1), a gear case (4) containing a reduction gear mechanism (3), and a motor side case (5) and a gear side case (6). A motor-driven chain block that supports a load sheave (9) in the motor-side case (5) and the gear-side case (6) and supports a suspension member (7); ) And the gear-side case (6) receive the end of the load chain (8) hanging on the load sheave (9) and lock the chain link (81) at the end. An electric chain block having a hooking recess (51) (61) having a stop surface (52) (62). 2. The locking recesses (51) and (61) are provided with locking surfaces (52) and (62) for locking the first chain link (81a) at the end of the load chain, and the first chain link (81).
2. The electric type according to claim 1, further comprising a fitting portion (54) (64) for receiving a second chain link (81b) positioned adjacent to the first chain link (81a) and orthogonal to the first chain link (81a). Chain block. 3. A chain link (81) that fits into the latching recesses (51) and (61) at the front of the latching recesses (51) and (61) in the recessed direction. (51) (6)
3. The device according to claim 1, wherein a retaining body for preventing detachment of the motor-side case from the outside is inserted from one side of the motor-side case to the other side of the gear-side case. Electric chain block. 4. A second shaft hole (72) is provided on the load-side tangent of the load sheave (9) at the end face of the motor-side case (5) and the gear-side case (6). This second
A first shaft hole () is provided between the fixed end of the load chain (8) and the fixed end of the load chain (8) , which is locked by the shaft hole (72) and the locking recesses (51) and (61). 71)
The electric type according to claim 1, wherein the suspension member (7) is fixed by the first and second shaft bodies (73) and (74) inserted through the first and second shaft holes (71) and (72). Chain block.