Manual Chain Hoist

Abstract

To provide a manual chain block capable of smoothly changing direction when changing direction by manually operating left and right hand chains. [Solution] The vehicle includes a main body (10), a connecting sleeve, and a wheel assembly, the connecting sleeve is connected to the main body, the connecting sleeve is rotatably connected to the wheel assembly, the wheel assembly includes a sprocket, the sprocket is journaled on the long axis of the main body, and a hand chain (24) extends from an opening hole (36) to the outside of the casing (14). A sleeve (38) is attached to cover the opening hole, and the hand chain extends from an opening (40) in the sleeve to the outside of the casing. Conventionally, because the opening for feeding out the hand chain on the hand chain guide side is wide, when force is applied to the hand chain, a gap becomes large, causing the hand chain to get caught on the wheel, making it difficult to change direction smoothly.

Description

[Technical Field]

[0001] The present invention relates to the technical field of lifting devices, and more particularly to a manual chain block. [Background technology]

[0002] A manual chain hoist is a portable lifting device that is easy to operate and can not only lift loads vertically but also move them horizontally.Manual chain hoists can be used in a variety of locations, such as construction sites and warehouses in mountainous areas, to install machinery and lift loads even without a power source (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2018-177466 Summary of the Invention [Problem to be solved by the invention]

[0004] When manually operating a chain hoist to lift or lower a load, the pulling direction of the manual chain hoist is fixed, making it difficult to lift heavy objects and requiring the operator to operate the hoist from underneath the load, posing safety issues. [Means for solving the problem]

[0005] The manual chain hoist of the present invention includes a main body, a connecting sleeve, and a wheel assembly, one end of which is connected to one end of the main body and the other end of which is rotatably connected to the wheel assembly. The wheel assembly includes a casing and a sprocket mounted within the casing, the sprocket being journaled on the longitudinal axis of the main body, and a hand chain fitted to the sprocket and attached to the wheel assembly, extending outside the casing.

[0006] Preferably, one end of the connecting sleeve is inserted into the left casing of the main body and fixed to the main body with a fixing member, and the center of the sprocket is connected perpendicular to the longitudinal axis of the main body and locked with a nut. Furthermore, preferably, a pair of openings are provided in the casing, and the hand chain extends through the openings to the outside of the casing.

[0007] Furthermore, it is preferable that a sleeve be attached to the outside of the casing so as to cover all or part of the pair of opening holes provided in the casing, and that the hand chain extend outside the casing through the opening of the sleeve. [Effects of the Invention]

[0008] With the manual chain hoist of this invention, the hand chain can be rotated 360 degrees and operated from any angle to lift or lower loads, so the worker's position is fixed and heavy loads can be lifted more safely. In addition, a sleeve is attached to cover the opening of the casing, and the hand chain can be let out through the opening of the sleeve, preventing the hand chain from derailing and making work even safer. [Brief explanation of the drawings]

[0009] [Figure 1] 1(a) is a perspective view of a manual chain block according to a first embodiment, and (b) is a partial front view thereof, and is a cross-sectional view taken along the line AA in (a). [Figure 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. 1(b) of the first embodiment. [Figure 3] FIG. 3 is an exploded view of the manual chain block of the first embodiment. [Figure 4] FIG. 4 is a partial perspective view of a manual chain block according to a second embodiment. [Figure 5] FIG. 5 is an explanatory diagram showing the use state of the manual chain block of the second embodiment, showing the hand chain facing downward (a), diagonally downward (b), sideways (c) and (d). DETAILED DESCRIPTION OF THE INVENTION

[0010] The present invention will be described in more detail below with reference to the embodiments shown in the drawings. However, the present invention is not limited to these. In describing the embodiments, parts that perform the same functions are given the same reference numerals, and redundant explanations will be omitted. [Example]

[0011] Example 1 Fig. 1(a) shows a perspective view of a manual chain block 50 of the first embodiment, and Fig. 1(b) shows a partial front view thereof. Fig. 2 shows a cross-sectional view taken along line AA in Fig. 1(b), and Fig. 3 shows a perspective view of the manual chain block 50 of the first embodiment in an exploded state. The manual chain block 50 comprises a manual chain block main body 10, a connecting sleeve 12, and a wheel assembly 18. The wheel assembly 18 includes a casing 14 and a sprocket 16 mounted within the casing. The left end of the connecting sleeve 12 is rotatably connected to the wheel assembly 18. The sprocket 16 is journaled on the longitudinal shaft 12 of the main body 10, and the hand chain 41 is fitted into and attached to the gear of the sprocket 16, extending outside the casing 14.

[0012] The right end of the connection sleeve 12 is inserted into the left casing 20 of the main body 10 and fixed with a screw. The right end of the connection sleeve 12 and the left end of the left casing 20 are each provided with a radially extending screw hole, and the screw is attached to the corresponding screw hole.

[0013] A locking portion 26 is provided at the left end of the connecting sleeve 12. The right end of the connecting sleeve 12 is inserted into the right end of the casing 14. The diameter of the locking portion 26 is larger than the diameter of the opening at the right end of the casing 14. The wheel assembly 18 further includes a hoist 32. The right side of the hoist 32 is inserted into the casing 14 and screwed in to seal the casing 14. The right end of the hoist 32 and the outside of the left side of the casing 14 are each provided with a radially threaded hole, and a screw is attached to the corresponding screw hole.

[0014] The casing 14 is provided with a partition extending outward, and the hand chain 24 passes through an opening 36 to exit the casing 14. The center of the sprocket 16 is supported perpendicular to the longitudinal axis 12 of the main body 10 and fixed by a nut 13.

[0015] In the manual chain block 50 according to the first embodiment, a first end of the connecting sleeve is connected to one end of the manual chain block body, and the other end of the connecting sleeve is rotatably connected to the assembly, so the hand chain guide can rotate 360 ​​degrees. This allows the direction of operation of the hand chain to be reversed, improving work efficiency. Example 2

[0016] FIG. 4 is a partial perspective view of a manual chain block 60 according to a second embodiment. 4, the sleeves 38 are attached to the casing 14 with screws (not shown) so as to cover a portion of each of the pair of openings 36. The sleeves 38 may also be attached so as to cover the entire openings 36, and may be attached by welding or other methods. The sleeves 38, 38 are provided with openings 40, 40 large enough to allow the hand chains 24, 24 to pass through. The hand chains 24, 24 extend outside the casing 14 through the openings 40, 40.

[0017] 5A and 5B show the manual chain hoist 60 of the second embodiment in use. In (a), the hand chains 24 are facing downward, and when lifting a load, the operator pulls the right hand chain 24 downward, for example, and when lowering the load, the operator pulls it in the opposite direction. 5(b) shows the case where the hand chains 24, 24 are oriented diagonally downward. The operator pulls the hand chains 24, 24 in response to lifting or lowering the load, just as in the downward direction, but in this case, the worker can avoid operating the hand chains directly below the load.

[0018] 5(c) shows the case where the hand chains 24, 24 are oriented leftward. The operator can operate the hand chains over a wider operating area, ensuring a safer working location. Figure 5(d) shows the case where the hand chains 24, 24 are facing rightward, which is the case where the hand chains 24, 24 are operated in the opposite direction to that shown in (c). The manual chain hoist 60 of this invention has a hand chain guide that rotates 360 degrees, so the hand chains 24, 24 can be operated from any direction.

[0019] In the manual chain block 60 according to this embodiment, sleeves 38 are provided in each of the pair of openings 36, 36, which prevents the hand chains 24, 24 from coming off the casing 14 or the gears of the sprocket 16 housed therein, thereby enabling safer work.

[0020] In the second embodiment, the sleeves 38 are attached to the openings 36 of the casing 14, but when the casing 14 is manufactured, the casing 14 having the sleeves 38 can be integrally processed. [Industrial Applicability]

[0021] The manual chain block of this invention can be used to lift and lower loads by rotating the load chain and winding up or down the load chain by operating the hand chain. [Explanation of symbols]

[0022] 10 Main body, manual chain block main body 12 Connecting sleeve 14 Casing 16 sprockets 18 Wheel assembly 20 Left casing 22 Long axis 24 Hand Chain 26 Locking part 28 Fixing member, screw 30 nuts 32 Hoist 34 Baffle plate 36 Opening hole 38 Sleeve 40 Opening 50,60 Manual Chain Block

Claims

1. Includes a body (10), a connecting sleeve (12), and a wheel assembly (18); One end of the connecting sleeve is connected to one end of the main body, and the other end of the connecting sleeve is rotatably connected to the wheel assembly; The wheel assembly includes a casing (14) and a sprocket (16) mounted within the casing; The sprocket is journalled on the longitudinal axis (22) of the body; A hand chain is attached by fitting onto the sprocket, and the hand chain extends outside the casing. A manual chain hoist characterized by:

2. The body includes a left casing (20), 2. The manual chain block according to claim 1, wherein one end of the connecting sleeve is inserted into the left casing and fixed to the main body by a fixing member.

3. 3. The manual chain block according to claim 1, wherein the center of the sprocket is connected perpendicularly to the long shaft and is locked with a nut (30).

4. 4. A manual chain block according to claim 1, wherein the casing has a pair of openings (36, 36) through which the hand chain passes and extends to the outside of the casing.

5. 5. The manual chain block according to claim 4, wherein a sleeve (38) is attached to the outside of the casing so as to cover all or part of the pair of opening holes, and the hand chain extends outside the casing by passing through openings (40, 40) of the sleeve.

6. 4. The manual chain block according to claim 1, wherein a pair of sleeves are attached to the outside of the casing, and the hand chain extends from the inside to the outside of the casing through openings in the sleeves.

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