JP4039872B2 - Handing aid for manual chain block - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a manual work assisting tool in a manual chain block.
[0002]
[Prior art]
Conventionally, manual chain blocks have been hand-drawn by the operator directly gripping the hand chain. The physical burden was given. Therefore, as shown in Japanese Utility Model Publication No. 7-11107, there is provided a foil for winding the middle of the hand chain of the manual chain block and an electric motor for rotating the foil as a means for reducing the burden on the operator. A manual chain block has been developed that operates the hand chain by pulling it down electrically. However, this manual chain block has a problem of high cost because it uses an electric motor.
[0003]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION An object of the present invention is to provide a hand-drawing work assisting tool that can reduce the physical burden on a worker during hand-drawing work without using an electric motor.
[0004]
[Means for Solving the Problems]
The present invention achieves the above-described object, and is a manual operation assisting tool that performs a chain hoisting operation with a manual chain block, and is pivotally attached to a support frame so as to be openable and closable, and joined to each other at the front ends. And a pair of rotating members each having an engaging surface that engages with the horizontal link of the chain, and a handle fixed to the rotating member. A hand-drawing operation assisting tool that performs a hand-drawing operation of the inserted chain.
[0005]
In the hand-drawing work assisting tool of the present invention, the rotating member can be divided at the center portion, and by opening and closing, the chain is sandwiched by the turning member and fixed to the assisting tool at the time of handing. , Grip the handle in the direction perpendicular to the direction of pulling the chain with the handle horizontal, and can perform the pulling action, so that the force can be easily transmitted and the physical burden on the operator can be reduced. When lifting, it is possible to provide a hand assist tool that can be moved upward freely by bending the handle (rotating member) upward and releasing the engagement of the chain.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 of the present invention is a manual operation assisting tool for performing a chain hoisting operation of a manual type chain block, which is pivotally attached to a support frame so as to be openable and closable, and a joining surface to which the respective tip ends are joined. A pair of rotating members each having an engaging surface that engages with the horizontal link of the chain, and a handle fixed to the rotating member, and is inserted into the ends of the pair of rotating members by opening and closing the handle. The rotating member is divided at the center and can be opened and closed. At the time of the handing operation, the shoulder portion of the side link of the chain is engaged with the engaging surface. Since the chain is sandwiched between the rotating members and the chain is fixed to the auxiliary tool, the operator can perform a hand-drawing action with the handle leveled, so that the force is easily transmitted and the physical burden on the operator is reduced. Can also When lifting the ingredients is folded the handle or pivot member upward, by releasing the engagement of the chain, it has an action that can provide guidance aid which can be freely moved upward.
[0007]
According to the second aspect of the present invention, the support frame is a fixed support frame, and a movable support frame having one end pivotally attached to one rotation member, and the movable support frame is the other rotation. It has a fitting groove to be engaged with the locking projection of the member, and since the movable support frame can be easily opened, the chain can be easily attached to and detached from the hand-drawing work assisting tool.
[0008]
The invention according to claim 3 is characterized in that the rotating member is provided with a projection that fits into the link long hole of the vertical link of the chain at the closed position of the rotating member. Since the projection at the end can be inserted into the vertical link, the engagement surface of the horizontal link can be deeply provided in the insertion direction of the vertical link of the rotating member, so that force transmission in the manual operation is ensured. It can be performed and has the effect of enhancing the strength of the engagement surface.
[0009]
The invention according to claim 4 is characterized in that the support frame is a pair of fixed support frames on which the rotation member is pivotally mounted, and has the same function as the invention according to claim 1. Have.
[0010]
The invention according to claim 5 is a hand-drawing work assisting tool for performing a chain hoisting operation of the manual chain block, and a cylindrical portion through which the chain is inserted, and a pair of frames extending from both sides of the cylindrical portion to one side And a handle provided at the front end of the frame, and the cylindrical portion has a chain engaging groove into which the vertical link of the link chain is fitted in the upper part opposite to the frame extending direction. It has a simple structure and does not require a handle opening / closing operation, and has an effect of providing a hand assisting tool capable of performing a hand drawing operation.
[0011]
Embodiments of the present invention will be described below.
[0012]
Embodiment 1
1 (a) and 1 (b) are front views showing a state where a work auxiliary tool in a manual chain block according to an embodiment of the present invention is attached to a chain, FIG. 2 is a front view thereof, and FIG. FIG. 4 is a front view showing the movable support frame.
[0013]
In the figure, 1 is a handle fixed to a pair of left and right rotating members pivotally mounted on a fixed support frame 3a, 2 is fixed to the tip of the handle 1, and is fixed to the fixed support frame by bolts and nuts. A rotating member that is attached and opens and closes. At the closed position of the rotating member 2 at the distal end of the rotating member 2, the tip protrusion 2 a that fits into the vertical link of the chain, and at the closed position of the rotating member 2, The front ends of the left and right rotating members 2 are joined to each other to have a joint surface 2b that acts as a stopper for the closing operation, and at the closed position of the rotating member 2 have the same radius of curvature as the shoulder of the side link of the link chain. And it has the chain engaging surface 2c engaged with the shoulder part of a weft link. Since the tip protrusion 2a is inserted into the long slot of the vertical link 10b of the chain 10, the engaging surface 2c that engages the shoulder 10a of the horizontal link 10c of the rotary member 2 is formed on the rotary member 2. Since the link 10b can be provided deeply in the insertion direction, it is possible to reliably transmit force during the hand-drawing operation and to enhance the strength of the engagement surface 2c. Reference numeral 3 denotes a support frame, which is a fixed support frame 3a that pivotally attaches the rotating member 2 with bolts and nuts, one end that is pivotally attached to one rotating member 2 with bolts and nuts, and the other end that has a free end that is the other end. It is formed from a movable support frame 3 b having a bolt fitting groove 4 that is engaged with the bolt 5 of the rotating member 2. A stopper piece 6 is rotatably attached to the movable support frame 3b by a screw 7 so that the bolt fitting groove 4 is not detached from the head of the bolt 5, and the stopper piece 6 is bolted into a bolt fitting groove by a spring 8. It is urged in the direction to close 4.
[0014]
Next, chain attachment and handing work operation of the handing work auxiliary tool according to the present embodiment will be described.
[0015]
First, the handle 1 is opened, and in the state shown in FIG. 1A, the chain 10 is inserted into the center of the auxiliary tool, the movable frame 3b is rotated, and the bolt fitting groove 4 is fitted to the bolt 5 head. The stopper piece 6 is rotated to narrow the opening of the bolt fitting groove 4, and the bolt fitting groove 4 of the movable support frame 3 b is engaged with the bolt 5 of the other rotating member 2.
[0016]
Next, as shown in FIG. 1B, from the state in which the chain 10 is inserted between the fixed support frame 3a and the movable support frame 3b of the auxiliary tool, the handle 1 is turned downward with the bolt 5 as the center. It rotates until the joining surface 2b of the moving member 2 joins. By this turning operation, the left and right grips 1 are in a substantially horizontal state, the tip protrusion 2a of the turning member 2 is fitted into the link long hole of the vertical link 10b, and the handle 1 is pushed downward by a hand so that the chain 10 Perform a manual action. During this operation, the tip protrusion 2a of the rotating member 2 is fitted into the link long hole of the vertical link 10b of the chain, and the chain engaging surface 2c of the rotating member 2 is the shoulder arc of the horizontal link 10c of the chain 10. Since it has the same radius of curvature as the radius of curvature, it is in close contact with the shoulder portion 10a of the weft link 10c of the chain 10 and is joined and engaged with the entire shoulder portion. It is transmitted and a stable guide operation can be performed.
[0017]
Next, the handle 1 is opened and bent in the state shown in FIG. 1B, and the tip protrusion 2a of the rotating member 2 is engaged with the link long hole of the vertical link 10b, and the chain engaging surface 2c and the chain shoulder portion are engaged. When the engagement with 10a is released, the auxiliary tool is pushed upward along the chain 10, and the auxiliary tool is raised to a certain position, the handle 1 is rotated around the bolt 5 to the closed position shown in FIG. The handle 1 is pushed down to the position where the joining surface of the moving member 2 is joined, that is, the closed position, and the hand-drawing operation is performed again. By repeating this operation, the chain is wound up.
[0018]
Next, an operation for removing the auxiliary tool from the chain 1 will be described. First, the handle 1 is bent to the position shown in FIG. 1 (b), and the stopper piece 6 is resisted against the spring 8 until the bolt fitting groove 4 of the movable support frame 3 b can release the engagement with the bolt 5. Then, the movable support frame 3b is rotated to the position shown in FIG.
[0019]
According to the present embodiment, the rotating member 2 is divided at the center so that it can be opened and closed. During the hand-drawing operation, the handle 1 is leveled, and the shoulder 10a of the weft link 10c of the chain 10 is engaged by the engaging surface 2c. In addition, since the chain 10 is sandwiched and a hand-drawing action is performed, the force is easily transmitted and the burden on the operator can be reduced.
[0020]
Embodiment 2
5 and 6 show the second embodiment of the present invention. The difference from the second embodiment is that the movable support frame is used in the first embodiment, but in this embodiment, the support is used. The frame 3 is a pair of fixed support frames 3a. When attaching the auxiliary tool to the chain 10, the handle 1 is bent as shown in FIG. 5, the one bolt 5 and the nut are disengaged, the fixed support frame 3a is opened, and the chain between the rotating members of the auxiliary tool is opened. Next, the fixed support frame 3 a is fixed to the rotating member 2 by the bolt 5, and the auxiliary tool is attached to the chain 10. The guiding operation is the same as in the first embodiment.
[0021]
Embodiment 3
7 to 10 show Embodiment 3 of the present invention. In the figure, 11 is a handle, 12 is a cylinder part through which the chain is inserted, 13 is a pair of frames extending from both sides of the cylinder part 12 to one side, and 14 is a cylinder in the center opposite to the frame extending direction of the cylinder part 12. A chain engaging groove 15 into which the vertical link 10 b of the link chain 10 is fitted in the upper part, and 15 is an opening of the cylindrical portion 12. The handle 11 is provided at the extended end of the frame. Next, description will be made on the chain mounting and the hand work operation of the hand work assisting tool according to the present embodiment.
[0022]
First, the chain 10 is inserted through the opening 15 into the tube portion 12, and the chain 10 is pulled in until the auxiliary tool reaches the hand pulling operation position. When the hand pulling operation position is reached, the handle 1 is lifted by hand, as shown in FIG. The handle 1 is pushed down. The vertical link 10b of the chain 10 is fitted into a chain engagement groove 14 provided in the upper part of the back surface of the cylindrical portion, the inner side of the cylindrical portion 12 is engaged with the horizontal link 10c, and the inner side of the cylindrical portion 12 is the horizontal link 10c. Acts as a stopper. When the handle 10 is further pushed down, a downward pushing force is transmitted to the chain 10 from the inside of the cylinder portion, and the hand pulling operation of the chain 10 is performed. When the chain 10 is pushed down, the handle 11 is returned to the state shown in FIG. 10, the auxiliary tool is lifted up again, the handle 11 is pushed down, and a hand pulling operation is performed. By repeating this operation, the chain is wound up.
[0023]
【The invention's effect】
The hand-drawing work assisting tool of the present invention divides the rotating member at the center so that it can be opened and closed. During the hand-drawing operation, the handle is leveled and the shoulder of the weft link of the chain is engaged with the engaging surface to rotate the chain. Since the chain is clamped with a moving member, the chain is fixed to the auxiliary tool, and a hand-drawing operation is performed, the force can be easily transmitted, and the physical burden on the operator can be reduced. By bending the rotating member upward and releasing the engagement of the chain, there is an effect that it is possible to provide a guide assisting tool that can be easily moved upward.
[0024]
In addition, the hand assist tool according to claim 5 has an effect of providing a hand assist tool that has a simple structure and that can perform the hand pull operation without requiring the opening / closing operation of the handle.
[Brief description of the drawings]
FIGS. 1A and 1B are front views showing a state in which a handle of a hand-drawing work assisting tool according to Embodiment 1 of the present invention is bent.
FIG. 2 is a front view showing a horizontal state of the handle.
FIG. 3 is a plan view of FIG. 2;
FIG. 4A is a front view showing a movable support frame. FIG. 4B is a side view of FIG.
FIG. 5 is a front view showing a state in which a handle of the hand-drawing work assisting tool according to the second embodiment of the present invention is bent.
FIG. 6 is a front view showing a horizontal state of the handle.
[Fig. 7] Fig. 7 is a plan view showing a manual operation assistance tool according to Embodiment 3 of the present invention.
FIG. 8 is a front view of FIG. 7;
FIG. 9 is a side view of FIG. 7;
FIG. 10 is a side view showing a state at the time of the manual work.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Handle 2 Rotating member 2a Tip protrusion 2b Joint surface 2c Chain engaging surface 3 Support frame 3a Fixed support frame 3b Movable support frame 4 Bolt fitting groove 5 Bolt 6 Stopper 7 Screw 8 Spring 9 Guide hole 10 Chain 10a Chain shoulder 10b Vertical link 10c Weft link 11 Handle 12 Tube part 13 Frame 14 Chain engaging groove 15 Opening part

Claims (5)

A hand-drawing operation assisting tool that performs chain hoisting operation with a manual chain block. A pair of rotating members each having a handle fixed to the rotating member, and performing a hand pulling operation of the chain inserted through the ends of the pair of rotating members by opening and closing the handle. A handicraft tool to do. The support frame is a fixed support frame and a movable support frame that is pivotally attached to one rotating member at one end, and the movable support frame is engaged with a locking projection of the other rotating member. 2. The manual work assisting tool according to claim 1, further comprising a fitting groove. 3. The hand-drawing work assisting tool according to claim 1, wherein the rotating member is provided with a protrusion that fits into a link long hole of the vertical link of the chain at the closed position of the rotating member. 4. The hand-drawing work assisting tool according to claim 1 or 3, wherein the support frame is a pair of fixed support frames that pivotally mount the rotation member. A manual operation assisting tool for performing a chain hoisting operation of a manual chain block, comprising: a cylindrical portion through which the chain is inserted, a pair of frames extending from both sides of the cylindrical portion, and a handle provided at the end of the frame And the tube portion has a chain engaging groove into which the vertical link of the link chain is fitted in the upper part on the opposite side in the frame extending direction.

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