JP7004626B2 - Assist device - Google Patents

Description

The present invention relates to an assist device that is worn and used by an operator and assists the operator's work (operation).

As the assist device as described above, there is one disclosed in Patent Document 1.
Patent Document 1 includes a main body portion attached to an operator, and right and left arm portions extending forward from the main body portion. An elevating device is provided in the main body, and right and left wires (corresponding to a cord-like body) extend from the elevating device. The wire extends downward from the arm portion, and the right and left hand portions are connected to the extending end of the wire.

The right hand portion holds the right lateral portion of the cargo, and the left hand portion holds the left lateral portion of the luggage to hold the luggage. With the luggage held in the hand portion, the hand portion (luggage) is raised by winding the wire with the elevating device, and the hand portion (luggage) is lowered by paying out the wire by the elevating device.

Japanese Unexamined Patent Publication No. 2016-129916

In the assist device as in Patent Document 1, there is room for improvement in terms of increasing the certainty of holding the luggage by the hand portion.
An object of the present invention is to increase the certainty of holding a load by the hand portion in the assist device provided with the right and left hand portions.

The assist device of the present invention is
A main body attached to an operator, an arm extending forward from the main body, right and left cords extending downward from the arm, and extending the cords. Equipped with right and left hand parts to be connected to the part and hold luggage,
The vertical right cord is changed to the side and extends from the side of the right hand portion toward the left hand portion, and the right cord is extended with respect to the right hand portion. A right support portion that movably supports the shape in the longitudinal direction is provided on the right hand portion.
The cord on the right is connected to the hand on the left while passing through the lateral side of the cargo.
The vertical left cord is changed to the side and extends from the side of the left hand portion toward the right hand portion, and the left cord is extended with respect to the left hand portion. A left support portion that movably supports the shape in the longitudinal direction is provided on the left hand portion.
The cord on the left is connected to the hand on the right while passing through the lateral side of the cargo.
When the weight of the luggage is applied to the right and left hand portions while the luggage is located between the right and left hand portions and inside the right and left cords in a plan view, the weight of the luggage is applied to the right and left hand portions. The right and left cords bring the right and left hand portions close to each other and are pressed against the side portions of the load, and the load is held by the right and left hand portions.

According to the present invention, when the weight of the luggage is applied to the hand portion while the luggage is held by the hand portion, tension is generated in the cord-shaped body, and the cord-shaped body brings the right and left hand portions closer to each other. Operational force is generated.
As a result, the right hand portion is pressed against the right lateral portion of the luggage, and the left hand portion is pressed against the left lateral portion of the luggage. Is enhanced.

According to the present invention, the operating force for bringing the right and left hand portions close to each other is generated by using the weight of the luggage as a power source, and it is not necessary to separately provide a power source such as an electric motor for generating the above-mentioned operating force. Therefore, it is advantageous in terms of simplification of the structure.

According to the present invention, the cord-like body extends from the lateral portion of the hand portion, and the cord-like body passes through the outside of the lateral portion of the luggage while the load is held by the hand portion.
As a result, the operating force that brings the right and left hand parts closer to each other by the cord-like body is applied to the hand part along the side part of the luggage, and the hand part properly presses the side part of the luggage. This is a state in which the hand portion is difficult to be removed from the luggage, and the certainty of holding the luggage by the hand portion is enhanced.

Depending on the shape and size of the luggage, the cord-like body may be pressed against the side surface of the luggage. In such a state, the cord also assists the holding of the luggage with respect to the holding of the luggage by the hand portion, and the certainty of the holding of the luggage by the hand portion is enhanced.

In the present invention
It is preferable that the right and left hand portions are provided with positioning portions that determine the vertical position of the hand portion on the lateral side portion of the luggage by contacting the upper portion of the luggage.

As described above, in a state where the right hand portion is pressed against the right lateral portion of the luggage and the left hand portion is pressed against the left lateral portion of the luggage, the right and left hand portions with respect to the luggage. In addition, if there is a difference in height, the certainty of holding the cargo by the hand portion may decrease.

According to the present invention, the positioning portion of the right hand portion is brought into contact with the upper portion of the luggage, the vertical position of the right hand portion with respect to the luggage is determined, and the positioning portion of the left hand portion is brought into contact with the upper portion of the luggage. If the vertical position of the left hand portion with respect to the luggage is determined, the vertical positions of the right and left hand portions with respect to the luggage can be set to the same position (same height).

As a result, in a state where the right hand portion is pressed against the right lateral portion of the luggage and the left hand portion is pressed against the left lateral portion of the luggage, the pressing action of the right hand portion and the left hand Since the pressing action of the portion is in a state of facing each other, the certainty of holding the cargo by the hand portion is enhanced.

In the present invention
The right support portion is provided at a position below the central position in the vertical direction in the right hand portion.
It is preferable that the left support portion is provided at a position lower than the central position in the vertical direction in the left hand portion.

According to the present invention, a moment is generated from the right support portion (left support portion) to the upper portion of the cord-like body to press the upper portion of the hand portion against the lateral portion of the load with respect to the lower portion of the hand portion.
As a result, in addition to the operating force that brings the right and left hand parts closer to each other, the moment that presses the upper part against the lower part of the hand part against the side part of the luggage increases the certainty of holding the luggage by the hand part. Be done.

In the present invention
When the load is not held by the right and left hand portions, the displacement prevention portion that prevents the inward displacement of the right and left portions of the cord-shaped body over the right and left hand portions is on the right. And it is preferable that it is provided in the left hand portion.

Since the cord is loose when the luggage is not held in the hand portion, when the luggage is placed between the right and left hand portions and the hand portion is attached to the luggage in this state, the cord The right and left hand parts of the body may get entangled with the luggage, making it difficult to attach the hand part to the luggage.

According to the present invention, when the hand portion is attached to the luggage, the displacement prevention portions provided on the right and left hand portions reduce the state in which the portion of the cord-like body extending over the right and left hand portions is entangled with the luggage. Therefore, it becomes easy to attach the hand part to the luggage.

In the present invention
The displacement prevention unit is
With the load not held in the right and left hand portions, the right and left portions of the cord-like body extending to the right and left hand portions are elastically pushed outward, and the right and left hands are used. When the load is held in the portion and tension is generated in the right and left cords, the cords on the right and left are pushed by the portions of the cords over the right and left hands and elastically displaced inward. Then, it is suitable.

According to the present invention, when the load is not held by the hand portion, the portion of the cord-shaped body extending to the right and left hand portions is pushed outward by the displacement prevention portion, and the right and left portions of the cord-shaped body are pushed out. It is possible to reduce the state in which the portion extending over the hand portion of the above is entangled with the luggage.

When the load is held by the hand portion and the cord is pressed against the lateral portion of the load by the tension generated in the cord, the portion of the cord that extends to the right and left hand portions. As a result, the displacement prevention portion is pushed and elastically displaced inward, and the state in which the cord-like body is pressed against the lateral portion of the load is less likely to be hindered by the displacement prevention portion.

In the present invention
The cord-like body is an elongated belt-like body having a thin thickness and width.
The vertically facing right cord-like body is changed sideways by the right support portion so that the surface of the right cord-like body faces in the vertical direction.
The vertically facing cord-like body is changed sideways by the left support portion so that the surface of the left cord-like body faces in the vertical direction.
The right hand portion is provided with a right change portion that changes the right cord shape that has been laterally changed by the right support portion so that the surface of the right cord shape faces laterally.
The left hand portion is provided with a left change portion that changes the left cord shape that has been laterally changed by the left support portion so that the surface of the left cord shape faces laterally. Is suitable.

When an elongated belt-shaped cord-like body is used, according to the present invention, in the hand portion, the cord-like body is turned sideways so that the surface of the cord-like body faces in the vertical direction by the right support portion (left support portion). It is changed, and the elongated belt-shaped cord is changed sideways without difficulty.

The cord-like body in a state where the surface faces in the vertical direction is changed by the right change portion (left change portion) so that the surface of the cord-like body faces in the lateral direction, and extends from the lateral portion of the hand portion.
As a result, when the cord extending from the lateral portion of the hand portion comes into contact with the lateral portion of the luggage located between the right and left hand portions, the cord-like body fits into the lateral portion of the luggage. As described above, it is possible to obtain a state in which the luggage is in contact with the side portion of the luggage without difficulty, and the certainty of holding the luggage by the hand portion is enhanced.

In the present invention
One right cord and one left cord are provided.
The up-and-down right cord-like body is changed sideways by the right support portion and extends from the lateral portion of the right hand portion toward the left hand portion.
The left side of the cord is changed to the sideways opposite to the right side of the right support by the left support so as to be located on the opposite side of the right side of the cord. It is preferable that the hand portion extends from the side portion toward the right hand portion.

According to the present invention, one right cord and one left cord can provide an operating force to bring the right and left hand portions close to each other, which is simplified by a small number of cords. It is possible to obtain an assist device with a similar structure.

In the present invention
Two right cords and two left cords are provided.
The right one and the other side of the cord-like body facing up and down are changed sideways in opposite directions by the right support portion, and the right one and the other side portion of the right hand portion are directed toward the left hand portion. Is postponed,
The one and the other side of the left side facing up and down are changed to the sideways opposite to each other by the left support part, and the side part of one and the other side of the left hand part is directed toward the right hand part. It is preferable that it is extended.

According to the present invention, the two right cords exert an operating force on one and the other side of the right hand portion to bring the right hand portion closer to the left hand portion. Similarly, the two left cords exert an operating force on one and the other side of the left hand portion to bring the left hand portion closer to the right hand portion.

As a result, the operating force that tries to bring the right hand part closer to the left hand part is applied to the right hand part in a well-balanced manner, and the operating force that tries to bring the left hand part closer to the right hand part. However, the left hand part is hung in a well-balanced manner, and the certainty of holding the luggage by the hand part is improved.

In the present invention
In the portion extending to the right and left hand portions, in the one right cord and the left cord arranged on the same side, the right one cord is arranged inward. And one of the cords on the left is placed on the outside,
In the portion extending to the right and left hand portions, in the right other cord and the left other cord arranged on the same side, the left other cord is arranged inside. It is preferable that the other cord-like body on the right side is arranged on the outside.

According to the present invention, the operating force for bringing the right hand portion closer to the left hand portion is applied to the right hand portion in a well-balanced manner, and the left hand portion is attempted to approach the right hand portion. The operating force is applied to the left hand part in a well-balanced manner, and the certainty of holding the luggage by the hand part is enhanced.

It is a right side view with the operator wearing the assist device. It is a rear view with the operator wearing the assist device. It is a perspective view of an assist device. It is a cross-sectional plan view which shows the state which the baggage is held by the right and left hand parts. It is a rear view which shows the state which the baggage is held by the right and left hand parts. It is a right side view which shows the state which the baggage is held by the right and left hand parts. It is an exploded perspective view of a hand part and a handle part. It is an exploded perspective view of a hand part. FIG. 3 is a cross-sectional plan view showing a state in which a load is held by the right and left hand portions in the first alternative embodiment of the invention.

1 to 9 show an assist device worn and used by an operator.
Unless otherwise specified, the front-rear direction and the left-right direction in the embodiment of the present invention are described as follows. When the worker wears the assist device, the front side is "front", the rear side is "rear", the right side is "right", and the left side is "left" when viewed from the worker.

(Overall configuration of assist device and main body)
As shown in FIGS. 1, 2, and 3, the assist device includes a main body 1 attached to the back of the worker, and right and left arms extending upward from the upper part of the main body 1 and extending forward. The right and left leg acting portions 3 provided at the lower part of the portion 2 and the main body portion 1 are provided, and a mounting belt 4 for mounting on an operator and right and left shoulder belts 5 are provided.

The main body 1 has a frame shape including a right and left vertical frames 6, a support plate 7 connected over the right and left vertical frames 6, and the like. The control device 8 is attached to the upper and lower intermediate portions of the rear surface of the support plate 7, and the battery 9 is attached to the lower portion of the rear surface of the support plate 7.

A mounting belt 4 is provided at the bottom of the main body 1, and a shoulder belt 5 is mounted at the top and bottom of the front surface of the support plate 7. A fixing belt 5a is attached over the upper part of the right and left shoulder belts 5. The fixed belt 5a of the shoulder belt 5 can be separated to the left and right by the buckle member in the middle portion, and the length can be adjusted.

The main body 1 is attached to the back of the worker by putting the arm and shoulder of the worker in the shoulder belt 5 and winding the mounting belt 4 around the waist of the worker to fix the belt. By keeping the fixed belt 5a of the shoulder belt 5 in the connected state, it is possible to prevent the right and left shoulder belts 5 from moving toward the arm portion of the worker and coming off the shoulder portion.

(Leg action part)
As shown in FIGS. 1, 2, and 3, the leg acting portion 3 is provided with a base 10, a transmission case 11, an operation arm 12, a leg belt 13, and the like. The base portion 10 is supported on the front portion of the lower portion of the support plate 7 so that the mounting position can be changed in the left-right direction, and the transmission case 11 is forwardly connected to the outer end portion of the base portion 10.

The operation arm 12 is swingably supported around the axis P1 in the left-right direction at the front of the transmission case 11, and a wide belt-shaped leg belt 13 is attached to the operation arm 12. A transmission mechanism (not shown) composed of a plurality of spur gears is provided inside the transmission case 11, and an electric motor (not shown) is provided inside the base 10. The transmission mechanism is provided by the electric motor. The operation arm 12 is oscillated around the axis P1 via the above.

The operator wraps the leg belt 13 around the thigh and attaches the leg belt 13 to the thigh with a hook-and-loop fastener (not shown) (magic tape (registered trademark)). With the worker wearing the assist device, the right leg acting part 3 (transmission case 11) is located on the right side of the worker's waist, and the left leg acting part 3 (transmission case 11) is located on the left side of the worker's waist. ) Is located.

(Arm and wire)
As shown in FIGS. 1, 2, and 3, the upper part of the right and left vertical frames 6 extends diagonally upward and diagonally forward beyond the right and left shoulders of the worker, and extends right and diagonally forward. It is the left arm part 2. A support member 16 is attached to the upper end of the arm portion 2, and a pulley (not shown) is rotatably supported by the support member 16.

An elevating device 17 is attached to the upper part of the rear surface of the support plate 7, and two wires 18 and 19 on the right and two wires 18 and 19 on the left extend from the elevating device 17. The outer support portion 15 is connected to the upper portion of the support plate 7, and the support member 16 is provided with the outer support portion 16a. The ends of the outer 18b and 19b of the wires 18 and 19 are connected to the outer support portion 16a of the outer support portion 15 and the support member 16, and the inner portions 18a and 19a of the wires 18 and 19 are connected to the elevating device 17. ..

The inners 18a and 19a of the two wires 18 and 19 on the right are hung on the pulley of the support member 16 on the right and extend downward. The mounting portion 21 is connected to the extending ends of the inners 18a and 19a of the two wires 18 and 19 on the right, and the right hand portion 20 is connected to the mounting portion 21.

The inners 18a and 19a of the two wires 18 and 19 on the left are hung on the pulley of the support member 16 on the left and extend downward. The mounting portion 21 is connected to the extending ends of the inners 18a and 19a of the two wires 18 and 19 on the left, and the left hand portion 20 is connected to the mounting portion 21.

(lift device)
As shown in FIGS. 1 and 2, a vertical transmission case 25 in which a transmission mechanism (not shown) is housed in the elevating device 17, a support case 26 laterally connected to the upper part of the transmission case 25, and a transmission case 25. The lower part of the motor 27 is provided with an electric motor 27 connected laterally, and four rotating bodies (not shown) rotatably supported around the axis laterally inside the support case 26.

The ends of the outer 18b and 19b of the wires 18 and 19 are connected to the outer support portion 15, and the inner 18a and 19a of the wires 18 and 19 are connected to each of the four rotating bodies inside the support case 26. ..

The electric motor 27 is operated by the control device 8. The power of the electric motor 27 is transmitted to the rotating body inside the support case 26 via the transmission mechanism inside the transmission case 25, and the rotating body is rotationally driven to the winding side and the feeding side.

(Overall configuration of the hand part)
The right and left hand portions 20 are shown in FIGS. 4 to 8, and the right and left hand portions 20 have the same shape.

Like the new vinegar in FIGS. 7 and 8, the hand portion 20 is formed by bending a plate material, and has a vertical side portion 35, a positioning portion 32 extending laterally from the upper portion of the lateral portion 35, and the like. Two holding portions 33 provided on the lateral side portion 35 are provided.

As shown in FIGS. 4, 5 and 7, two holding portions 33 are attached to the surface of the lateral portion 35 on the positioning portion 32 side. The holding portion 33 is provided with a vertically long base portion 33a having a semicircular cross section and a non-slip portion 33b.

The non-slip portion 33b of the holding portion 33 is formed in the form of a thin sheet by a gel material or a rubber material having adsorptive and adhesive properties, and is adhered to the outer surface of the base portion 33a of the holding portion 33. A thin sheet-like non-slip portion 32a made of the same material as the non-slip portion 33b of the holding portion 33 is adhered to the lower surface of the positioning portion 32.

As shown in FIGS. 4 and 5, the two holding portions 33 are attached to the surface of the lateral portion 35 on the positioning portion 32 side with a gap W1 from each other, and are attached to the positioning portion 32 side of the lateral portion 35. The length L3 protrudes from the surface of.

When the cross section of the holding portion 33 in the horizontal direction is viewed from above in a state where the hand portion 20 is suspended from the wires 18 and 19, the non-slip portion 33b of the holding portion 33 is held by the hand portion 20. It is formed in an arc shape protruding to the B side. The holding portion 33 is formed in a vertically elongated shape in which the vertical length L1 of the holding portion 33 is longer than the horizontal width L2 of the holding portion 33.

(Structure of the hand part for connecting the hand part and the mounting part)
As shown in FIGS. 4, 5, 6 and 8, in the right hand portion 20, the right support portion 38 formed by bending the plate material into a channel shape is the surface of the lateral portion 35 opposite to the positioning portion 32. It is connected to the bottom. The two support shafts 38a and 38b are rotatably supported by the right support portion 38 in a direction orthogonal to the opposite surface of the positioning portion 32 in the lateral portion 35, and the opening at the upper part of the right support portion 38. The portion 38c is open.

The handle portion 34 formed by bending the plate material into a channel shape is connected to the lower part of the opposite surface of the positioning portion 32 in the lateral portion 35 so as to cover the outside of the right support portion 38. A hook-and-loop fastener 36 (magic tape (registered trademark)) is attached to the upper surface portion and the side surface portion of the handle portion 34, and the opening 34a is opened at the upper portion of the handle portion 34.

Two right-changing portions 46 and 47 formed by bending a plate material into a channel shape are connected to one end and the other end at the lower part of the opposite surface of the positioning portion 32 in the lateral portion 35. ing.

The two support shafts 46a and 46b are rotatably supported by the right changing portion 46 along the opposite surface of the positioning portion 32 in the lateral portion 35. The two support shafts 47a and 47b are rotatably supported by the right changing portion 47 along the opposite surface of the positioning portion 32 on the lateral side portion 35.

The displacement prevention portion 50 made of a flat plate-shaped elastic body is connected to one end portion and the other end portion at the lower portion of the opposite surface of the positioning portion 32 in the lateral side portion 35.

Similar to the right hand portion 20, in the left hand portion 20, the left support portion 39 (support shafts 39a, 39b) similar to the right support portion 38, the left change portion 48 similar to the right change portions 46, 47, 49 (support shafts 48a, 48b, 49a, 49b), a handle portion 34, and a displacement prevention portion 50 are provided.

(Connection structure between the right hand part and the mounting part)
As shown in FIGS. 4, 5, 6 and 8, two right belts 28 and 29 (corresponding to a cord-like body) and a right mounting portion 22 are provided with respect to the right hand portion 20. There is.

The right mounting portion 22 is configured by connecting two belt mounting portions 22b to the lower portion of the upper portion 22a. The belts 28 and 29 have a thin thickness and width, are elongated, and do not expand or contract.

One belt 28 is attached to the belt attachment portion 22b of the right attachment portion 22 and extends downward. The belt 28 passes through the opening 34a of the handle portion 34 and the opening 38c of the right support portion 38 and is hung on the support shaft 38a of the right support portion 38 so that the surface of the belt 28 faces up and down. The downward belt 28 has been changed to the sideways direction.

Since the support shaft 38a of the right support portion 38 is rotatable, the state in which the belt 28 moves in the longitudinal direction with respect to the right hand portion 20 is allowed by the support shaft 38a of the right support portion 38, and the right side. The belt 28 is movably supported in the longitudinal direction with respect to the right hand portion 20 by the support shaft 38a of the support portion 38.

The lateral belt 28 reaches the support shaft 46a of the right change portion 46 while being twisted 90 degrees from the support shaft 38a of the right support portion 38, and the surface of the belt 28 is laterally oriented by the support shaft 46a of the right change portion 46. The orientation of the belt 28 has been changed so as to face.

The belt 28 extends from one lateral portion (support shaft 46a of the right changing portion 46) of the lateral portion 35 (right hand portion 20) to the left hand portion 20 through the position of the displacement prevention portion 50. It is connected to the support shaft 48b of the left change portion 48 of the left hand portion 20.

The other belt 29 is attached to the belt attachment portion 22b of the right attachment portion 22 and extends downward. The belt 29 passes through the opening 34a of the handle portion 34 and the opening 38c of the right support portion 38 and is hung on the support shaft 38b of the right support portion 38 so that the surface of the belt 29 faces up and down. The downward belt 29 is changed to the sideways direction opposite to the belt 28.

Since the support shaft 38b of the right support portion 38 is rotatable, the state in which the belt 29 moves in the longitudinal direction with respect to the right hand portion 20 is allowed by the support shaft 38b of the right support portion 38, and the right side. The belt 29 is movably supported in the longitudinal direction with respect to the right hand portion 20 by the support shaft 38b of the support portion 38.

The lateral belt 29 reaches the support shaft 47a of the right change portion 47 while being twisted 90 degrees from the support shaft 38b of the right support portion 38, and the surface of the belt 29 is laterally oriented by the support shaft 47a of the right change portion 47. The orientation of the belt 29 has been changed so as to face.

The belt 29 extends from the other lateral portion (support shaft 47a of the right changing portion 47) of the lateral portion 35 (right hand portion 20) to the left hand portion 20 through the position of the displacement prevention portion 50. It is connected to the support shaft 49b of the left changing portion 49 of the left hand portion 20.

(Connection structure between the left hand part and the mounting part)
As shown in FIGS. 4 and 5, two left belts 30 and 31 (corresponding to a cord-like body) and a left mounting portion 22 are provided with respect to the left hand portion 20.

The left mounting portion 22 is configured by connecting two belt mounting portions 22b to the lower portion of the upper portion 22a. The belts 30 and 31 have a thin thickness and width, are elongated, and do not expand or contract.

One belt 30 is attached to the belt attachment portion 22b of the left attachment portion 22 and extends downward. The belt 30 passes through the opening 34a of the handle portion 34 and the opening of the left support portion 39, is hung on the support shaft 39a of the left support portion 39, and faces up and down so that the surface of the belt 30 faces in the vertical direction. Belt 30 has been changed to the sideways direction.

Since the support shaft 39a of the left support portion 39 is rotatable, the state in which the belt 30 moves in the longitudinal direction with respect to the left hand portion 20 is allowed by the support shaft 39a of the left support portion 39, and is left. The belt 30 is movably supported in the longitudinal direction with respect to the left hand portion 20 by the support shaft 39a of the support portion 39.

The lateral belt 30 reaches the support shaft 48a of the left change portion 48 while being twisted 90 degrees from the support shaft 39a of the left support portion 39, and the surface of the belt 30 is laterally oriented by the support shaft 48a of the left change portion 48. The orientation of the belt 30 has been changed so as to face.

The belt 30 extends from one lateral portion (support shaft 48a of the left changing portion 48) of the lateral portion 35 (left hand portion 20) to the right hand portion 20 through the position of the displacement prevention portion 50. It is connected to the support shaft 46b of the right changing portion 46 of the right hand portion 20.

The other belt 31 is attached to the belt attachment portion 22b of the left attachment portion 22 and extends downward. The belt 31 passes through the opening 34a of the handle portion 34 and the opening of the left support portion 39, is hung on the support shaft 39b of the left support portion 39, and faces up and down so that the surface of the belt 31 faces in the vertical direction. The belt 31 of the above is changed to the sideways direction opposite to the belt 30.

Since the support shaft 39b of the left support portion 39 is rotatable, the state in which the belt 31 moves in the longitudinal direction with respect to the left hand portion 20 is allowed by the support shaft 39b of the left support portion 39, and is left. The belt 31 is movably supported in the longitudinal direction with respect to the left hand portion 20 by the support shaft 39b of the support portion 39.

The lateral belt 31 reaches the support shaft 49a of the left change portion 49 while being twisted 90 degrees from the support shaft 39b of the left support portion 39, and the surface of the belt 31 is laterally oriented by the support shaft 49a of the left change portion 49. The orientation of the belt 31 has been changed so as to face.

The belt 31 extends from the other lateral portion (support shaft 49a of the left changing portion 49) of the lateral portion 35 (left hand portion 20) to the right hand portion 20 through the position of the displacement prevention portion 50. It is connected to the support shaft 47b of the right changing portion 47 of the right hand portion 20.

(Belt placement in the hand)
As described in the above (connection structure between the right hand portion and the mounting portion) (connection structure between the left hand portion and the mounting portion), the belt with the belts 28 to 31 connected to the hand portion 20. 28 to 31 are in the following states.

As shown in FIGS. 4, 5 and 6, in the belts 28 to 31, the length of the belt 28 (the length from the belt mounting portion 22b of the right mounting portion 22 to the support shaft 48b of the left changing portion 48) and the belt. The length of 29 (the length from the belt mounting portion 22b of the right mounting portion 22 to the support shaft 49b of the left changing portion 49) and the length of the belt 30 (changing to the right from the belt mounting portion 22b of the left mounting portion 22). The length of the portion 46 up to the support shaft 46b) and the length of the belt 31 (the length from the belt attachment portion 22b of the left attachment portion 22 to the support shaft 47b of the right change portion 47) are all the same length. Is set to.

In the right hand portion 20, the two belts 28 and 29 are changed to be laterally opposite to each other by the right support portions 38 (support shafts 38a and 38b).
In the left hand portion 20, the two belts 30 and 31 are changed to be laterally opposite to each other by the left support portion 39 (support shafts 39a and 39b).

The right support portion 38 and the right change portions 46 and 47 are provided at positions below the center position in the vertical direction in the right hand portion 20 (horizontal side portion 35), and the belts 28 and 29 are on the right. It extends from one and the other lateral portion at the bottom of the hand portion 20 (lateral portion 35).

The left support portion 39 and the left change portions 48 and 49 are provided at positions below the central position in the vertical direction in the left hand portion 20 (horizontal side portion 35), and the belts 30 and 31 are on the left. It extends from one and the other lateral portion at the bottom of the hand portion 20 (lateral portion 35).

As shown in FIG. 4, in the portion extending over the right and left hand portions 20, one of the right belts 28 is located inside (the luggage B side) and the left one belt 30 is arranged outside in a plan view. Has been done.
In the portion extending over the right and left hand portions 20, the other left belt 31 is located inside (the luggage B side) and the other right belt 29 is arranged outside in a plan view.

(Handle part)
As shown in FIGS. 5, 7 and 8, a handle portion 40 that can be attached to and detached from the handle portion 34 of the hand portion 20 is provided. The handle portion 40 is provided with an outer portion 41 integrally formed of synthetic resin and an inner portion 42 made of metal, and the inner portion 42 is connected to the inner surface of the outer portion 41 by screws.

The inner portion 42 is formed by bending a metal plate material, and has a lateral portion 43 arranged in the vertical direction, an upper portion 44 extending laterally from the upper portion of the lateral portion 43, and an end portion of the upper portion 44. A lateral portion 45 extending upward from the surface is provided.

In the inner portion 42, the hook-and-loop fastener 37 (magic tape (registered trademark)) is attached to the surface of the lateral portion 43 on the upper side portion 44 side, and the hook-and-loop fastener 37 is attached to the lower surface of the upper side portion 44. ..

The right handle portion 40 attached to the right hand portion 20 and the handle portion 40 attached to the left hand portion 20 have a symmetrical shape. The ascending operation switch 23 is attached to the right handle portion 40 (outer portion 41), and the lowering operation switch 24 is attached to the left handle portion 40 (outer portion 41).

As shown in FIGS. 1, 2, and 3, the right and left harnesses 14 connected to the control device 8 are inside the right and left arm portions 2, and pass through the inside of the arm portions 2 to be arm portions. It extends to the upper end of 2. The harness 14 extends downward from the opening at the upper end of the arm portion 2, the right harness 14 is connected to the ascending operation switch 23, and the left harness 14 is connected to the descending operation switch 24. ing.

(Attachment and removal of the handle to the hand)
As shown in FIGS. 5, 7 and 8, the handle portion 40 is connected to the hand portion by contacting the surface fastener 37 of the handle portion 40 against the surface fastener 36 of the hand portion 20 (handle portion 34). It can be attached to 20 (handle portion 34), and the ascending operation switch 23 (lowering operation switch 24) is attached to the hand portion 20 (handle portion 34) via the handle portion 40.

Since the connection range of the hook-and-loop fasteners 36 and 37 is relatively wide, the mounting position of the handle portion 40 in the hand portion 20 (handle portion 34) may be arbitrarily changed in the connection range of the hook-and-loop fasteners 36 and 37. Can be done.

By separating the hook-and-loop fastener 37 of the handle portion 40 from the hook-and-loop fastener 36 of the hand portion 20 (handle portion 34), the handle portion 40 is removed from the hand portion 20 (handle portion 34), and the ascending operation switch. 23 (lowering operation switch 24) is removed from the hand portion 20 (handle portion 34).

In the right and left hand portions 20, the right mounting portion 22 is mountable and removable to the right mounting portion 21, and the left mounting portion 22 is mountable and removable to the left mounting portion 21.

As a result, when another hand portion 20 having a structure and function different from that of the hand portion 20 shown in FIGS. 4 to 8 is prepared, the mounting portion 22 is removed from the mounting portion 21 and the other hand portion 20 is provided. The mounting portion 22 can be attached to the mounting portion 21, or another hand portion 20 can be directly attached to the mounting portion 21.

When various hand portions 20 are attached to the mounting portion 21 (when replaced), the hook-and-loop fastener 37 of the handle portion 40 is connected to the hook-and-loop fastener 36 of the replaced hand portion 20 to form the handle portion 40 (when replaced). The ascending operation switch 23 and the descending operation switch 24) can be shared by various hand units 20.

(Activation of leg action part and elevating device by control device)
As shown in FIGS. 1, 2, and 3, when the ascending operation switch 23 is pressed, the leg action is performed while the ascending operation switch 23 is being pressed and operated as described later (working mode of the assist device). In the portion 3, the operation arm 12 is swung downward by the electric motor, and the thigh portion of the operator is operated downward.

When the ascending operation switch 23 is pushed after the operating arm 12 of the leg acting portion 3 is swung downward, the ascending operation switch 23 is operated as described later (working mode of the assist device). During the pushing operation, in the elevating device 17, the rotating body is rotationally driven to the winding side by the electric motor 27, the inners 18a and 19a of the wires 18 and 19 are wound by the rotating body, and the hand portion 20 is raised. do.

When the lowering operation switch 24 is pushed, the rotating body is rotationally driven to the feeding side by the electric motor 27 in the raising / lowering device 17 while the lowering operation switch 24 is being pushed, and the inners 18a and 19a of the wires 18 and 19 are driven. Is paid out from the rotating body, and the hand portion 20 is lowered.

When the pushing operation of the ascending operation switch 23 and the descending operation switch 24 is stopped, the electric motor 27 is stopped in the elevating device 17.
The electric motor 27 is equipped with an electromagnetic brake (not shown), and the electromagnetic brake is automatically released when the electric motor 27 operates, and the electromagnetic brake is automatically braked when the electric motor 27 is stopped or not energized. It becomes a state.

As a result, when the electric motor 27 is stopped, the inners 18a and 19a of the wires 18 and 19 are not extended from the elevating device 17, and the hand portion 20 is lowered even if the weight of the luggage B is applied to the hand portion 20. There is nothing to do.

When the electric motor is stopped in the leg acting portion 3, the electric motor is in a free rotation state. As a result, when the worker walks, when the worker bends the waist downward, or when the worker bends the knee and drops the waist, the operation arm 12 swings so as to follow the worker's thigh. Therefore, the operation of the operator is not hindered.

(Luggage holding operation by the hand part)
As shown in FIGS. 4, 5 and 6, a columnar baggage B such as a drum can or an oil can is assumed. As shown in FIGS. 1 and 2, when the worker wearing the assist device holds the handle portions 34 and 40 of the hand portion 20 with his right hand and left hand forward, the lateral portion 35 of the hand portion 20 and the side portion 35 and the hand portion 20 are held. The holding portion 33 faces in the vertical direction, and the positioning portion 32 of the hand portion 20 faces in the left-right direction.

As shown in FIGS. 4, 5 and 6, it is assumed that the luggage B is placed on the floor for the worker wearing the assist device. The operator positions and contacts the positioning portion 32 of the hand portion 20 on the upper portion of the luggage B, and brings the lateral portion 35 and the holding portion 33 (non-slip portion 33b) of the hand portion 20 to the right (left) of the luggage B. ), And the holding portion 33 (non-slip portion 33b) of the hand portion 20 is attracted to the lateral portion of the luggage B.

When the luggage B is not held by the hand portion 20, the portions of the belts 28 to 31 extending to the right and left hand portions 20 are pushed outward by the displacement prevention portion 50 of the hand portion 20. As a result, the state in which the right and left hand portions 20 of the belts 28 to 31 are entangled with the luggage B can be reduced, and the hand portion 20 can be easily attached to the luggage B.

In the hand portion 20, the two holding portions 33 are attached to the lateral portion 35 with a space W1 from each other, and protrude from the surface of the lateral portion 35 on the luggage B side by the length L3 to the luggage B side. It is located (see FIG. 4).

As a result, the side portion of the luggage B is not brought into contact with the side portion 35 of the hand portion 20, and the side portion of the luggage B is positioned between the two holding portions 33 of the hand portion 20 while the hand is placed. The operation of pressing the two holding portions 33 of the portions 20 against the side portions of the luggage to attract them can be performed.

Since the non-slip portion 33b of the holding portion 33 of the hand portion 20 has an arc shape, even if a small convex portion exists on the lateral side portion of the luggage B or an inclined surface exists, the hand portion 20 may have a non-slip portion 33b. The holding portion 33 (non-slip portion 33b) can be attracted so that the luggage B fits into the lateral portion.

When the hand portion 20 is raised in the state shown in FIGS. 4, 5 and 6, the luggage B is lifted together with the hand portion 20 by the suction action of the holding portion 33 (non-slip portion 33b) of the hand portion 20.

In this case, since the holding portion 33 (non-slip portion 33b) of the hand portion 20 is vertically elongated, the lateral portion of the luggage B is on the lower side along the holding portion 33 (non-slip portion 33b) of the hand portion 20. Even if you try to move (even if you try to fall), the holding part 33 (non-slip part 33b) of the hand part 20 will be attracted along the direction in which the baggage B is going to move, so make sure that the baggage B does not fall. It is held properly (sufficiently).

(The state of each part when the luggage is held by the hand part)
As shown in FIGS. 4, 5 and 6 described above (the operation of holding the luggage by the hand portion), when the luggage B is lifted by the hand portion 20, the weight of the luggage B is applied to the hand portion 20 and the belts 28 to 31 are applied. Tension is generated in.

When tension is generated in the belts 28 to 31, the belt 28 generates an operating force FR1 that brings the left hand portion 20 closer to the right hand portion 20. The belt 29 generates an operating force FR2 that brings the left hand portion 20 closer to the right hand portion 20.
The belt 30 generates an operating force FL1 that brings the right hand portion 20 closer to the left hand portion 20. The belt 31 generates an operating force FL2 that brings the right hand portion 20 closer to the left hand portion 20.

In this case, since the lengths of the belts 28 to 31 are set to be the same (see the above-mentioned (arrangement state of the belt in the hand portion)), the operating forces FR1, FR2, FL1, FL2 have the same value.

As described above, when the operating forces FR1, FR2, FL1 and FL2 that bring the right and left hand portions 20 close to each other are generated, the holding portion 33 (non-slip portion 33b) of the right hand portion 20 becomes the luggage B. The holding portion 33 (non-slip portion 33b) of the left hand portion 20 is pressed against the left lateral portion of the luggage B. As a result, the certainty of holding the luggage B by the hand portion 20 is enhanced.

Since the belts 28 to 31 extend from one and the other side of the hand portion 20 (lateral portion 35) in a state where the luggage B is held by the hand portion 20, the luggage B is held by the hand portion 20. In this state, the belts 28 to 31 pass through the outside of the lateral portion of the luggage B.

Therefore, the operating forces FR1, FR2, FL1, FL2 that bring the right and left hand portions 20 close to each other are in a state of being on the hand portion 20 along the lateral portion of the luggage B, and the hand portion 20 is placed on the lateral portion of the luggage B. The hand portion 20 is in a state of being properly pressed, and the hand portion 20 is in a state of being difficult to be removed from the luggage B.

Depending on the shape and size of the luggage B, the belts 28 to 31 may be pressed against the side portion of the luggage B. Therefore, the belts 28 to 31 are also held by the hand portion 20 with respect to the luggage B. It helps to hold.

When tension is generated in the belts 28 to 31, the displacement prevention portion 50 is pushed by the portions of the belts 28 to 31 extending over the right and left hand portions 20, and the displacement prevention portion 50 is elastically displaced inward, so that the belts 28 to 31 are elastically displaced inward. Is less likely to be hindered by the displacement prevention portion 50 from being pressed against the lateral portion of the luggage B.

As shown in FIGS. 4 and 5, the positioning portion 32 of the hand portion 20 is positioned and brought into contact with the upper portion of the luggage B so that the right and left hand portions 20 are positioned in the vertical direction with respect to the luggage B. Can be set to the same position (same height). In the portion extending over the right and left hand portions 20, the belt 28 and the belt 30 are in a state of overlapping in a side view, and the belt 29 and the belt 31 are in a state of overlapping in a side view.

As a result, the operating force FR1 (pressing action of the left hand portion 20) and the operating force FL1 (pressing action of the right hand portion 20) are in a state of facing each other in side view. The operating force FR2 (pressing action of the left hand portion 20) and the operating force FL2 (pressing action of the right hand portion 20) are in a state of facing each other in side view.

As shown in FIG. 5, the right support portion 38 is provided in the right hand portion 20 (horizontal side portion 35) at a position lower than the central position in the vertical direction. The left support portion 39 is provided at a position below the central position in the vertical direction in the left hand portion 20 (horizontal side portion 35).

As a result, in addition to the operating forces FR1, FR2, FL1, FL2 that bring the right and left hand portions 20 closer to each other, the upper portion of the belts 28 and 29 from the right support portion 38 with respect to the lower portion of the right hand portion 20. Then, a moment MR is generated that presses the upper portion of the right hand portion 20 against the lateral portion of the luggage B. The upper portion of the belts 30 and 31 from the left support portion 39 generates a moment ML that presses the upper portion of the left hand portion 20 against the lateral portion of the luggage B with respect to the lower portion of the left hand portion 20.

As shown in FIG. 6, in a state where the luggage B is held by the hand portion 20, the axis in the left-right direction passing through the right support portion 38 (support shafts 38a, 38b) and the left support portion 39 (support shafts 39a, 39b). The luggage B can be rotated around (see rotation directions C1 and C2) to change the holding posture of the luggage B.

(Working form of assist device)
For example, when luggage B placed on a pallet or floor is placed on a high shelf or a truck bed, the worker bends the waist down or bends the knee to drop the waist, and the luggage on the pallet or floor. Hold B by hand, then hold Luggage B with your hands extended down, extend your waist upwards or stand up, then lift Luggage B by hand to lift Luggage B to a high shelf or truck. It is assumed that it will be placed on the loading platform of.

A state in which the leg acting portion 3 and the elevating device 17 are operated by the control device 8 based on the pushing operation of the ascending operation switch 23 and the descending operation switch 24 in a state where the operator wearing the assist device performs the above-mentioned work. Will be explained.

As shown in FIGS. 1 and 2, when the operator is wearing the assist device and the operator does not press both the ascending operation switch 23 and the descending operation switch 24, the electric motor 27 of the elevating device 17 is used. Stops, and the electric motor of the leg acting portion 3 is in a stopped state (free rotation state).

When the worker bends the waist down (bends the knee and drops the waist) and holds the pallet or the luggage B on the floor, when the worker pushes the lowering operation switch 24, the electric motor 27 in the elevating device 17 Operates to the feeding side, the inners 18a and 19a of the wires 18 and 19 are fed, and the hand portion 20 is lowered.

When the pressing operation of the lowering operation switch 24 is stopped, the electric motor 27 is stopped and the hand unit 20 is stopped. Therefore, the operator can use the hand unit 20 as described in the above-mentioned (operation for holding the luggage by the hand unit). Holds luggage B by.

The operator lifts the luggage B by extending the waist portion upward (by standing up) while holding the luggage B by the hand portion 20. When the operator pushes the ascending operation switch 23, the operation arm 12 is swung downward in the leg acting portion 3, the thigh portion of the operator is operated downward, and the operator raises the waist portion. Extending (standing up) is assisted.

After the operator stood up with the ascending operation switch 23 pushed and operated, when it was detected in the leg acting portion 3 that the operating arm 12 reached a position facing substantially downward, the operator stood up (standing up). ), The electric motor of the leg acting portion 3 is in a stopped state (free rotation state).

Next, when the operator pushes the ascending operation switch 23, the electric motor 27 operates on the winding side in the elevating device 17, the inners 18a and 19a of the wires 18 and 19 are wound, and the hand portion 20 is ascended. do. When the hand unit 20 rises to a desired position, the electric motor 27 stops and the hand unit 20 stops by stopping the pushing operation of the ascending operation switch 23.

The worker walks to a high shelf on which the luggage B should be placed, a truck bed, or the like. When the worker arrives at a high shelf, a truck bed, or the like and the worker pushes the lowering operation switch 24, the electric motor 27 operates on the feeding side in the elevating device 17, and the inner 18a of the wires 18 and 19 a. 19a is extended and the hand portion 20 is lowered.

The operator places the luggage B on a high shelf, a cargo bed of a truck, or the like, and removes the hand portion 20 from the luggage B. When the luggage B is placed on a high shelf, a cargo bed of a truck, or the like, it returns to the initial state, so the same operation is performed for the next luggage B.

(First Different Form of Implementation of the Invention)
The right hand portion 20 may be provided with one right belt 28, and the left hand portion 20 may be provided with one left belt 31, as described below.

As shown in FIG. 9, in the right hand portion 20, one support shaft 38a is provided on the right support portion 38, and one support shaft 46a, 47a is provided on the right change portions 46, 47. In the left hand portion 20, one support shaft 39a is provided on the left support portion 39, and one support shaft 48a, 49a is provided on the left change portions 48, 49.

In the right hand portion 20, the belt 28 is attached to the belt attachment portion 22b of the right attachment portion 22 and extends downward. The belt 28 passes through the opening 34a of the handle portion 34 and the opening 38c of the right support portion 38 and is hung on the support shaft 38a of the right support portion 38 so that the surface of the belt 28 faces up and down. The downward belt 28 has been changed to the sideways direction.

The lateral belt 28 reaches the support shaft 46a of the right change portion 46 while being twisted 90 degrees from the support shaft 38a of the right support portion 38, and the surface of the belt 28 is laterally oriented by the support shaft 46a of the right change portion 46. The orientation of the belt 28 has been changed so as to face.

The belt 28 extends from one lateral portion (support shaft 46a of the right changing portion 46) of the lateral portion 35 (right hand portion 20) to the left hand portion 20 through the position of the displacement prevention portion 50. It is connected to the support shaft 48a of the left changing portion 48 of the left hand portion 20.

In the left hand portion 20, the belt 31 is attached to the belt attachment portion 22b of the left attachment portion 22 and extends downward. The belt 31 passes through the opening 34a of the handle portion 34 and the opening of the left support portion 39, is hung on the support shaft 39a of the left support portion 39, and faces up and down so that the surface of the belt 31 faces in the vertical direction. The belt 31 of the above is changed to the sideways direction opposite to the belt 28.

The lateral belt 31 reaches the support shaft 49a of the left change portion 49 while being twisted 90 degrees from the support shaft 39a of the left support portion 39, and the surface of the belt 31 is laterally oriented by the support shaft 49a of the left change portion 49. The orientation of the belt 31 has been changed so as to face.

The belt 31 extends from the other lateral portion (support shaft 49a of the left changing portion 49) of the lateral portion 35 (left hand portion 20) to the right hand portion 20 through the position of the displacement prevention portion 50. It is connected to the support shaft 47a of the right changing portion 47 of the right hand portion 20 so as to be located on the opposite side of the right belt 28.

When the luggage B is lifted by the hand portion 20, the weight of the luggage B is applied to the hand portion 20, and tension is generated on the belts 28 and 31.
When tension is generated in the belts 28 and 31, the belt 28 generates an operating force FR1 that brings the left hand portion 20 closer to the right hand portion 20. The belt 31 generates an operating force FL1 that brings the right hand portion 20 closer to the left hand portion 20.

As described above, the operating forces FR1 and FL1 that bring the right and left hand portions 20 closer to each other are generated, so that the holding portion 33 (non-slip portion 33b) of the right hand portion 20 is on the right side of the luggage B. It is pressed against the side portion, and the holding portion 33 (non-slip portion 33b) of the left hand portion 20 is pressed against the left lateral portion of the luggage B. As a result, the certainty of holding the luggage B by the hand portion 20 is enhanced.

(Second alternative form of carrying out the invention)
In the belts 28 to 31 of FIGS. 4 to 8, the lengths of the belts 28 to 31 may be set as described below.

The length of the belt 28 arranged inside (the length from the belt mounting portion 22b of the right mounting portion 22 to the support shaft 48b of the left changing portion 48) and the length of the belt 31 (the belt of the left mounting portion 22). The length from the mounting portion 22b to the support shaft 47b of the right changing portion 47) is set to the same length.

The length of the belt 29 arranged on the outside (the length from the belt mounting portion 22b of the right mounting portion 22 to the support shaft 49b of the left changing portion 49) and the length of the belt 30 (the belt of the left mounting portion 22). The length from the mounting portion 22b to the support shaft 46b of the right changing portion 46) is set to the same length, and the lengths of the belts 29 and 30 are slightly longer than the lengths of the belts 28 and 31.

As a result, the operating forces FR2 and FL1 of the belts 29 and 30 are slightly smaller than the operating forces FR1 and FL2 of the belts 28 and 31, so that the belts 28 and 30 extend to the right and left hand portions 20. It is possible to suppress an abnormal noise when the belts rub against each other, and it is possible to suppress an abnormal noise when the belts 29 and 31 rub against each other.

(Third alternative form of carrying out the invention)
In the hand portion 20 shown in FIGS. 4 to 8 (second alternative embodiment of the embodiment of the invention), the belt 28 is arranged on the outside and the belt 30 is arranged on the inside in a plan view. The 29 may be arranged inside and the belt 31 may be arranged outside.

In a plan view, the belt 28 may be arranged inside and the belt 30 may be arranged outside, the belt 29 may be arranged inside, and the belt 31 may be arranged outside.

In a plan view, the belt 28 may be arranged on the outside and the belt 30 may be arranged on the inside, the belt 29 may be arranged on the outside, and the belt 31 may be arranged on the inside.

(Fourth Different Embodiment of the Invention)
The ascending operation switch 23 and the descending operation switch 24 may be provided on the mounting portion 21.
According to this structure, the handle portion 40 may be connected to the hand portion 20 so that the hand portion 20 and the handle portion 40 can be attached to and detached from the attachment portion 21 (to be replaced). May be configured).

The ascending operation switch 23 and the descending operation switch 24 may be provided on the hand unit 20.
According to this structure, the handle portion 40 may be connected to the hand portion 20, and the hand portion 20 and the handle portion 40 may be connected to the mounting portion 21.

(Fifth alternative form of carrying out the invention)
The ascending operation switch 23 may be provided on the left handle portion 40 (hand portion 20, mounting portion 21), and the descending operation switch 24 may be provided on the right handle portion 40 (hand portion 20, mounting portion 21).
Both the ascending operation switch 23 and the descending operation switch 24 may be provided on one of the right or left handle portions 40 (hand portion 20, mounting portion 21).

(Sixth Different Embodiment of the Invention)
The right and left arm portions 2 may be abolished and one arm portion 2 may be provided.
According to this structure, two wires 18 are extended from one arm portion 2, and the right mounting portion 21 (hand portion 20) is connected to one of the two wires 18, and the two wires 18 are connected. The left mounting portion 21 (hand portion 20) is connected to the other side. Alternatively, one wire 18 is extended from one arm portion 2, the end portion of the one wire 18 is bifurcated, and the right mounting portion 21 (hand portion 20) is attached to one of the branched portions. Connect and connect the left mounting portion 21 (hand portion 20) to the other side of the branch portion.

(7th alternative embodiment of the invention)
It may be configured not to include the leg acting portion 3. The main body 1 may be configured to be attached to the shoulder of the worker instead of the back of the worker.
Instead of the belts 28 to 31, a wire (not shown) or a metal chain (not shown) may be used as the cord.

(Eighth Different Embodiment of the Invention)
The elevating device 17, the ascending operation switch 23, and the descending operation switch 24 are abolished, the wires 18 and 19 are connected to the main body portion 1 and the arm portion 2, the position of the hand portion 20 is fixed, and the hand portion 20 is raised and lowered. It may be configured not to do so.

According to this structure, instead of the wires 18 and 19, an elongated belt made of synthetic fiber (not shown) or a metal chain (not shown) may be used. The wires 18 and 19 may be abolished and the belts 28 to 31 may be directly connected to the arm portion 2.

INDUSTRIAL APPLICABILITY The present invention can be applied to an assist device that is attached to an operator and assists the operator in holding a load.

1 Main body 2 Arm 20 Hand 28 Belt (cord)
29 Belt (cord)
30 belt (cord)
31 Belt (cord)
32 Positioning part 38 Right support part 39 Left support part 46 Right change part 47 Right change part 48 Left change part 49 Left change part 50 Displacement prevention part B Luggage

Claims (9)

A main body attached to an operator, an arm extending forward from the main body, right and left cords extending downward from the arm, and extending the cords. Equipped with right and left hand parts to be connected to the part and hold luggage,
The vertical right cord is changed to the side and extends from the side of the right hand portion toward the left hand portion, and the right cord is extended with respect to the right hand portion. A right support portion that movably supports the shape in the longitudinal direction is provided on the right hand portion.
The cord on the right is connected to the hand on the left while passing through the lateral side of the cargo.
The vertical left cord is changed to the side and extends from the side of the left hand portion toward the right hand portion, and the left cord is extended with respect to the left hand portion. A left support portion that movably supports the shape in the longitudinal direction is provided on the left hand portion.
The cord on the left is connected to the hand on the right while passing through the lateral side of the cargo.
When the weight of the luggage is applied to the right and left hand portions while the luggage is located between the right and left hand portions and inside the right and left cords in a plan view, the weight of the luggage is applied to the right and left hand portions. An assist device in which the right and left hand portions are brought close to each other by the right and left cords and pressed against the side portions of the luggage, and the luggage is held by the right and left hand portions. The assist device according to claim 1, wherein the positioning portion for determining the vertical position of the hand portion on the lateral side portion of the luggage by contacting the upper portion of the luggage is provided on the right and left hand portions. The right support portion is provided at a position below the central position in the vertical direction in the right hand portion.
The assist device according to claim 1 or 2, wherein the left support portion is provided at a position lower than the central position in the vertical direction in the left hand portion. When the load is not held by the right and left hand portions, the displacement prevention portion that prevents the inward displacement of the right and left portions of the cord-shaped body over the right and left hand portions is on the right. The assist device according to any one of claims 1 to 3 provided on the left hand portion. The displacement prevention unit is
With the load not held in the right and left hand portions, the right and left portions of the cord-like body extending to the right and left hand portions are elastically pushed outward, and the right and left hands are used. When the load is held in the portion and tension is generated in the right and left cords, the cords on the right and left are pushed by the portions of the cords over the right and left hands and elastically displaced inward. The assist device according to claim 4. The cord-like body is an elongated belt-like body having a thin thickness and width.
The vertically facing right cord-like body is changed sideways by the right support portion so that the surface of the right cord-like body faces in the vertical direction.
The vertically facing cord-like body is changed sideways by the left support portion so that the surface of the left cord-like body faces in the vertical direction.
The right hand portion is provided with a right change portion that changes the right cord shape that has been laterally changed by the right support portion so that the surface of the right cord shape faces laterally.
The left hand portion is provided with a left change portion that changes the left cord shape that has been laterally changed by the left support portion so that the surface of the left cord shape faces laterally. The assist device according to any one of claims 1 to 5. One right cord and one left cord are provided.
The up-and-down right cord-like body is changed sideways by the right support portion and extends from the lateral portion of the right hand portion toward the left hand portion.
The left side of the cord is changed to the sideways opposite to the right side of the right support by the left support so as to be located on the opposite side of the right side of the cord. The assist device according to any one of claims 1 to 6, which extends from the side portion of the hand portion toward the right hand portion. Two right cords and two left cords are provided.
The right one and the other side of the cord-like body facing up and down are changed sideways in opposite directions by the right support portion, and the right one and the other side portion of the right hand portion are directed toward the left hand portion. Is postponed,
The one and the other side of the left side facing up and down are changed to the sideways opposite to each other by the left support part, and the side part of one and the other side of the left hand part is directed toward the right hand part. The assist device according to any one of claims 1 to 6, which has been postponed. In the portion extending to the right and left hand portions, one of the right cords and the left cord are arranged inward on the same side. And one of the cords on the left is placed on the outside,
In the portion extending to the right and left hand portions, the left other cord is arranged inward in the right other cord and the left other cord arranged on the same side. The assist device according to claim 8, wherein the cord-like body on the right side is arranged on the outside.

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