JP2019094145A - Assisting instrument - Google Patents

Abstract

To provide an assisting instrument comprising a waist assisting part which acts on thighs of a worker, in which harnesses are appropriately arranged across a control device and an electric actuator of the waist assisting part.SOLUTION: The assisting instrument comprises: a waist assisting part 3 which is supported on a lower part of a main body part 1, and assists a worker to raise the waist; and a control device mounted on a part on the opposite side to the worker in the main body part 1. The waist assisting part 3 is provided with operation arms 12 which are oscillatably supported on the main body part 1 and mounted on the thighs of the worker, and an electric actuator which oscillates and drives downward the operation arms 12. The main body part 1 is formed with an opening part 32a which penetrates the worker side and the control device side. Harnesses 53 and 54 which connects the control device to the electric actuator are passed through the opening part 32a.SELECTED DRAWING: Figure 9

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to an assist device that a worker wears and uses and assists the worker's work.

As an assist instrument as described above, there is one as disclosed in Patent Document 1.
In patent document 1, the main-body part attached to a worker's back part and the right and left arm parts extended from the main-body part to the front side are provided. A lifting device is provided in the main body, and right and left wires (corresponding to cords) are extended from the lifting device. A wire extends downward from the arm portion, and right and left hand portions are connected to the extending end of the wire.

  In Patent Document 1, a waist support portion is provided. The waist assist portion is provided with an operation arm attached to the thigh of the worker, and an electric actuator that swings the operation arm downward.

  Thereby, the hand portion (load) can be raised by winding up the wire by the lifting device while holding the load in the hand portion, and the hand portion (load) is lowered by drawing out the wire by the lifting device. be able to.

  For example, the worker bends the lower back, bends the knee and lowers the lower back, holds the load placed on the floor by the hand, and the worker extends the upper back 2.) When lifting a load, the operation arm is driven downward at the waist assist unit, and the operator's thighs are manipulated downward to help the waist extend upward (stand up).

JP 2017-94425 A

  An assist instrument with a waist assist unit that acts on the worker's thighs, when connecting the harness across the control device attached to the main unit and the electric actuator of the waist assist unit, the worker feels uncomfortable It is desirable to arrange the harness so as not to give.

  The present invention is directed to an assist device including a lower back assistance portion that acts on a worker's thighs, in which a harness can be properly disposed across a control device and an electric actuator of the lower back assistance portion. There is.

The assist device of the present invention is
A body attached to the back of the worker;
An arm portion extended to the front side from the main body portion;
A cord extending downward from the arm;
A hand connected to the extension end of the cord-like body;
A waist support portion supported by the lower portion of the main body portion to assist raising of the operator's waist;
A control device attached to a portion of the main body opposite to the worker;
The left and right operation arms which are swingably supported by the main body and attached to the thighs of the operator and the electric actuator which swings and drives the left and right operation arms downward to the waist assist portion; Is equipped with
The main body portion is formed with an opening that passes through the worker side and the control device side,
A harness connecting the control device and the electric actuator is passed through the opening.

  According to the present invention, in the assist tool, when the lower portion of the main body portion is provided with the waist assist portion, and the portion of the main body portion opposite to the operator is provided with the control device, the harness opens the opening portion of the main body portion. It is connected through the control device and the electric actuator of the lower back assistance unit.

As a result, since the harness is not arranged to pass through the lateral outer side of the main body, the harness hardly hits the worker, and the worker is less likely to feel discomfort.
The harness is guided to the opening of the main body by passing through the opening of the main body, and the opening of the main body is provided with a guiding function of the harness, so the harness is properly disposed. It is advantageous in terms of

In the present invention,
In the control device side portion of the main body portion, a battery mounting portion is provided below the control device,
It is preferable that the opening be formed at a position between the control device and the battery attachment portion in the main body.

  According to the present invention, when the battery mounting portion is provided below the control device, the harness extended from the control device passes between the control device and the battery mounting portion and passes through the opening portion of the main body portion. I will go to the worker side. As a result, the harness can be disposed by effectively utilizing the space between the control device and the battery attachment portion, which is advantageous in terms of compactly arranging the harness.

In the present invention,
It is preferable that the plurality of openings be formed in a line along the left-right direction.

  According to the present invention, in the case of arranging the harness that has come out to the worker side through the opening of the main body part to the right and left, the harness that has come out of the right opening of the main body is extended to the right The harness can be distributed to the right and left without difficulty by arranging the harness extending from the left opening of the main body to the left.

In the present invention,
The waist support portion is attached to a worker-side portion of the lower portion of the main body portion in a state of projecting to the left and right more than the lower portion of the main body portion,
It is preferable that the opening is formed at a position above the waist support portion in the main body portion.

  When the waist support portion is attached to the worker side portion in the lower portion of the main body portion in a state in which the waist support portion protrudes to the left and right more than the lower portion of the main body portion, the worker side portion in the body portion and the worker side In the part, a step is generated, and a space along the step is generated.

  According to the present invention, since the opening of the main body portion is located above the above-mentioned step (space), the harness which has come out to the worker side through the opening of the main body is effectively made the above-mentioned step (space). It can be used for placement, which is advantageous in terms of compact placement of the harness.

In the present invention,
A base supported by the lower part of the main body in the lower back assistance part, a base extended to the left and right relative to the main body, and a front extending from the base and the operating arm supported swingably The department is equipped
It is preferable that the harness passes through a space formed by the base and the support.

According to the present invention, the base portion of the lower back assistance portion and the support portion are arranged to intersect in a plan view, and a space is generated in the portion on the worker side between the lower back assistance portion and the support portion.
Thus, the harness can be disposed by effectively using the above-described space, which is advantageous in terms of compactly arranging the harness.

In the present invention,
An upper pad portion which is located above the opening at a worker side portion of the main body and which protrudes to the worker side, and a lower pad which is located below the opening and which protrudes to the worker side It is preferable that a part is provided.

According to the present invention, since the upper pad portion and the lower pad portion are provided in the worker side portion of the main body portion, the discomfort of the worker is reduced.
When the upper pad portion and the lower pad portion are provided in the main body portion, a space is generated between the upper pad portion and the lower pad portion between the back portion of the worker and the main body portion.
As a result, the harness that has come out toward the worker through the opening of the main body can be disposed by effectively using the above-described space, which is advantageous in terms of compactly arranging the harness. .

In the present invention,
It is preferable that the lower pad portion be provided with a cover which is extended upward to a position facing the opening portion and which forms a passage space of the harness between the lower pad portion and the main body portion.

According to the present invention, the harness which has been exposed to the worker through the opening of the main body is covered by the cover and less likely to hit the back of the worker, thus giving the worker a sense of discomfort. Less.
In this case, the lower pad portion is also used as the support member of the cover, which is advantageous in simplifying the support structure of the cover.

In the present invention,
At the lower part of the main body, on the side of the worker, there is provided an attachment belt which is provided along the lower waist support and which is wound around the waist of the worker to attach the main body to the worker.
Preferably, the harness is passed between the attachment belt and the waist support.

  According to the present invention, when the attachment belt for attaching the main body to the back of the worker is provided, according to the present invention, the harness which has come out to the worker through the opening of the main body is between the attachment belt and the waist support. Because the harness is less likely to hit the worker due to the attachment belt, the worker is less likely to feel uncomfortable.

It is a right side view in the state where the worker equipped an assistant instrument. It is a rear view in the state where the worker equipped an assistant instrument. It is the perspective view which looked the assistant instrument from the worker side. It is a rear view of an assistant instrument in the state where a cover was attached. It is a rear view of an assistant instrument in the state where a cover was removed. It is the perspective view which looked the support plate in a main-body part from the other side with the worker. It is the perspective view which looked the support plate in a main-body part from the worker side. It is a transverse top view near the waist auxiliary part. It is the front view which looked at the vicinity of the waist assistance part from the worker side. It is a perspective view of a cover. It is a vertical side view of the vicinity of the outer cover part and the upper cover part of a cover. It is a top view near the outer cover part and the upper cover part of a cover. It is a side view which shows the state which put the assist instrument on the floor etc.

FIGS. 1 to 13 show an assist device that the operator wears and uses.
The front-rear direction and the left-right direction in the embodiments of the present invention are described as follows unless otherwise specified. When the worker wears the assist tool, the front side is "front", the rear side is "rear", the right side is "right", and the left side is "left" as viewed from the worker.

(Whole composition of assist instrument)
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 portion of the main body 1 and extending forward. The right and left lumbar auxiliary parts 3 provided at the lower part of the main body 1 are provided with an attachment belt 4 for attachment to a worker and right and left shoulder belts 5.

  The right wires 18 and 19 (corresponding to cords) extend downward from the right arm portion 2 downward, and the right hand portion 20 is at the extension end of the right wires 18 and 19. It is connected. The left wires 18 and 19 (corresponding to cords) extend downward from the left arm 2 and the left hand 20 is at the extension end of the left wires 18 and 19. It is connected.

(Attachment of assist equipment)
As shown in FIG. 1 and FIG. 2, the arm portion (shoulder portion) of the worker is put in the shoulder belt 5, and the attachment belt 4 is wound around the waist portion of the worker and fixed. Part 1 is attached.

  The weight of the assist tool and the load mainly rests on the waist of the worker through the attachment belt 4, and the weight of the assist tool and the load is stably supported by the waist of the worker. The shoulder belt 5 mainly exerts a function to stop the state in which the main body 1 tries to move backward from the back of the worker.

  After the worker attaches the main body 1 to the back, the worker wraps the leg belt 13 of the lumbar assist unit 3 around the thigh and uses the surface fastener (not shown) (magic tape (registered trademark)), Attach the leg belt 13 to the thigh. When the worker wears the assist tool, the right waist support 3 (support 11) is located on the right side of the worker's waist, and the left waist support 3 (support 11) is located on the left side of the worker's waist ) Is located.

(Body part)
As shown in FIGS. 1 to 5, the main body 1 is frame-shaped by including right and left vertical frames 6 and a support plate 7 connected to the right and left vertical frames 6. .

  As shown in FIGS. 6 and 7, the support plate 7 is provided with a flat upper portion 31, a middle portion 32 and a lower side portion 33, and the right side of the upper portion 31, the middle portion 32 and the lower side portion 33 In the left and right portions, a mounting portion 34 having a semicircular cross section is provided along the vertical direction. Between the upper portion 31 and the middle portion 32, a reinforcing rib 40 protruding in a convex shape is formed along the left-right direction.

  As shown in FIGS. 4 and 5, the right and left vertical frames 6 are formed in a round pipe shape and fixed to the mounting portion 34. The upper portions of the right and left vertical frames 6 extend diagonally upward beyond the shoulders of the worker's right and left and extend diagonally forward to form the right and left arm portions 2.

  As shown in FIGS. 6 and 7, in the support plate 7, the worker side and the worker are on the opposite side in a state where the two openings 32 a are arranged in the lower portion of the middle portion 32 along the left and right direction It is opened so as to penetrate the device 8). The upper portion 31 and the middle portion 32 project further toward the worker than the lower portion 33.

  A mounting portion 35 along the left-right direction is provided between the middle portion 32 and the lower side portion 33 and at the lower portion of the lower side portion 33, and the mounting portion 35 is closer to the worker than the lower side portion 33. It is overhanging. Thus, the mounting portion 35 also reinforces the support plate 7.

(Control device and battery)
As shown in FIGS. 5, 6 and 7, in the main body portion 1 (support plate 7), the control device 8 straddles the rib 40 in the portion on the side opposite to the worker of the upper side portion 31 and the middle portion 32. It is done. A battery mounting portion 38 is connected to a portion of the lower side portion 33 opposite to the worker, and the battery 9 is attachable to and removable from the battery mounting portion 38.

  As shown in FIGS. 4 and 5, the connector 38a of the battery mounting portion 38 protrudes upward, and the connector 8a protrudes downward from the lower portion of the control device 8. The connector 8a of the control device 8 and the connector of the battery mounting portion 38 A harness 39 is connected across 38a.

  Thereby, the battery 9 and the battery attachment portion 38 are attached below the control device 8 in the portion (the control device 8 side portion) of the main body 1 (support plate 7) opposite to the worker in rear view. ing.

(lift device)
As shown in FIGS. 5, 6 and 7, in the main body 1 (support plate 7), a lifting device 17 is connected to a portion of the upper side 31 opposite to the worker.

  The lifting device 17 includes an upper and lower transmission case 25 which houses a transmission mechanism (not shown), a support case 26 horizontally connected to the upper part of the transmission case 25, and an electric motor horizontally connected to the lower part of the transmission case 25. 27, four rotating bodies (not shown) rotatably supported around a horizontal axis inside the support case 26.

  In the main body portion 1 (support plate 7), the outer support portion 15 is connected to the upper portion of the upper side portion 31. The ends of the outer 18 b and 19 b of the wires 18 and 19 are connected to the outer support portion 15, and the inners 18 a and 19 a of the wires 18 and 19 are connected to each of four rotating bodies inside the support case 26. ing.

  The controller 8 operates the electric motor 27. The power of the electric motor 27 is transmitted to the rotating body in the support case 26 via the transmission mechanism in the transmission case 25 so that the rotating body is rotationally driven to the take-up side and the delivery side.

A harness 41 is connected across the connector 8 b protruding downward from the lower portion of the control device 8 and the connectors 27 a and 27 b of the electric motor 27.
A rotation sensor 42 for detecting the rotation angle of the rotating body inside the support case 26 is attached to the support case 26, and a harness 43 is connected across the connector 8 b of the control device 8 and the rotation sensor 42. .

(Arm part and hand part)
As shown in FIGS. 1 to 5, the right and left arm parts 2 extend obliquely upward beyond the shoulders of the worker's right and left and extend obliquely forward. Right and left support members 16 are attached to the upper end portion of the arm portion 2, and right and left pulleys (not shown) are rotatably supported by the support member 16.

  The support member 16 is provided with an outer support portion 16 a. The ends of the outer portions 18 b and 19 b of the right wires 18 and 19 are connected to the outer support portion 16 a of the right support member 16, and the inners 18 a and 19 a of the right wires 18 and 19 are of the right support member 16. It is hung on the pulley and extended downward. The mounting portion 21 is connected to the extension ends of the inners 18 a and 19 a of the right wires 18 and 19, and the right hand portion 20 is connected to the mounting portion 21.

  The ends of the outer portions 18b and 19b of the left wires 18 and 19 are connected to the outer support portion 16a of the left support member 16, and the inners 18a and 19a of the left wires 18 and 19 are of the left support member 16. It is hung on the pulley and extended downward. The attachment portion 21 is connected to the extension ends of the inners 18 a and 19 a of the left wires 18 and 19, and the left hand portion 20 is connected to the attachment portion 21.

  As shown in FIGS. 4 and 5, in a state where the ends of the outers 18 b and 19 b of the wires 18 and 19 are connected to the outer support portion 16 a of the support member 16, the inners 18 a and 19 a of the wires 18 and 19 are It has entered the inside of the support member 16.

  As a result, the inners 18a and 19a of the wires in the vicinity of the support member 16 are covered with the support member 16 and not exposed, and the wires 18 and 19 enter from the inners 18a and 19a to the inside of the outers 18b and 19b. Entry of rainwater etc. is prevented.

(Rise operation switch and fall operation switch)
As shown in FIGS. 1, 2, 4 and 5, the right and left cover portions 22 are provided, the raising operation switch 23 is attached to the right cover portion 22, and the lowering operation switch 24 is provided to the left cover portion 22. Is attached.

  The right and left harnesses 14 connected to the downward connector 8c of the control device 8 enter the interior of the longitudinal frame 6 through the opening 6a of the longitudinal frame 6, and pass through the interior of the longitudinal frame 6 and the arm portion 2 and the arm portion It is extended to the upper end of 2.

  The harness 14 extends downward from the opening at the upper end of the right and left arms 2 and extends downward while being covered by the curl cord. The right harness 14 is connected to the raising operation switch 23, and the left harness 14 is connected to the lowering operation switch 24.

  The cover 22 is attachable to and detachable from the hand 20 by a hook and loop fastener (not shown) (magic tape (registered trademark)). In the state shown in FIGS. 1, 2, 4 and 5, the right cover portion 22 is attached to the right hand portion 20, and the left cover portion 22 is attached to the left hand portion 20.

  The hand unit 20 is attachable to and detachable from the attaching unit 21, and another hand unit 20 having a different structure and function from the hand unit 20 shown in FIGS. 1, 2, 4 and 5 can be attached to the attaching unit 21. (Replaceable).

  When various hand portions 20 are attached to the attachment portion 21 (when replaced), the cover portion 22 (the raising operation switch 23 and the lowering operation switch 24) is attached by attaching the cover portion 22 to the exchanged hand portion 20, It can be shared by various hand units 20.

  As shown in FIGS. 1 and 2, when the lifting operation switch 23 is pressed, the rotating body is rotationally driven by the electric motor 27 to the winding side in the lifting device 17, and the inners 18a and 19a of the wires 18 and 19 are rotated. The hand unit 20 is raised by being taken up by the body.

  When the lowering operation switch 24 is pressed, the rotary body is rotationally driven to the delivery side by the electric motor 27, the inners 18a and 19a of the wires 18, 19 are fed out from the rotary body, and the hand portion 20 is lowered.

When the pushing operation of the raising operation switch 23 and the lowering operation switch 24 is stopped, the electric motor 27 is stopped.
The electric motor 27 is provided with an electromagnetic brake (not shown), and the electromagnetic brake is automatically released when the electric motor 27 is actuated, and is automatically braked when the electric motor 27 is stopped and not energized. It becomes a state.

(Cover covering the part of the body opposite to the worker)
As shown in FIGS. 1, 2 and 4, the main body 1 is provided with a cover 28 that covers a portion opposite to the worker.

  As shown in FIGS. 4 and 10, the cover 28 is integrally formed of a synthetic resin, and the main body 44, the upper cover 45 of the upper portion of the main body 44, the mounting portion 46 of the upper portion of the main body 44, the main body The lower mounting portion 47 of the portion 44, and the right and left mounting portions 48 of the main body portion 44 are provided.

  When the cover 28 is attached, the attachment portion 47 is inserted into the engagement portion (not shown) of the support plate 7 from the upper side, the attachment portion 48 having a semicircular cross section is fitted to the vertical frame 6, and the upper cover 45 is outer Fit into the support portion 15. The mounting portion 46 is placed on the upper side portion of the support plate 7 (upper side portion 31), and a screw (not shown) is tightened across the mounting portion 46 and the upper side portion of the support plate 7 (upper side portion 31).

  Thereby, the cover 28 is attached to the part on the opposite side to the worker in the main body 1, and the control device 8, the lifting device 17 and the outer support portion 15 are covered by the cover 28.

  As shown in FIGS. 4, 11 and 12, in a state in which the cover 28 is attached (a state in which the upper cover portion 45 is fitted in the outer support portion 15), the inners 18 a and 19 a of the wires 18 and 19 are outer support portions. It is in the state of being covered from the front and rear direction by the upper cover portion 45 and the upper cover portion 45.

  Four semicircular notches 45a are formed on the upper side of the upper cover 45, and a seal member 49 such as a rubber material or a felt material is attached to the inner surface along the notches 45a.

  As shown in FIGS. 11 and 12, when the upper cover 45 is fitted into the outer support 15, the upper cover 45 is positioned above the outer support 15, and the outer 18 b of the wires 18 and 19 is located. The nut 50 for fixing the 19b to the outer support portion 15 enters the notch portion 45a of the upper cover portion 45, and the gap between the upper cover portion 45 (the notch portion 45a) and the outer support portion 15 is a seal member 49. It is closed by

  Thereby, the state in which rain water etc. which flowed down along outer 18b, 19b of wire 18, 19 enters inside from a crevice between upper cover part 45 (notched part 45a) and outer support part 15 Is prevented.

(Lower waist support)
As shown in FIGS. 1 to 5, the right and left waist assisting portions 3 are supported at the lower portion of the main body 1, and the waist assisting portion 3 includes the base 10, the support 11, the operation arm 12, the leg belt 13 and the like. Is equipped. The operation arm 12 is swingably supported around a horizontal axis P1 in the left-right direction of the front portion of the support portion 11, and a wide belt-like leg belt 13 is attached to the operation arm 12.

  As shown in FIGS. 8 and 9, in the main body 1 (support plate 7), the base 10 is connected by a bolt 56 to the worker side portion of the mounting portion 35, and the base 10 is the main body 1 (vertical frame 6 and the mounting portion 34) are extended laterally to project to the right and left. The connection position of the base 10 can be changed in the left-right direction along the attachment portion 35.

A support 11 is connected to the lateral outer end of the base 10 and extends forward from the base 10. The operation arm 12 is swingably supported in the front-rear direction around the horizontal axis P1 in the left-right direction of the front portion of the support portion 11. The operation arm 12 is configured to be freely pivotable in the left-right direction around the axis P2.
With the above configuration, the waist assist portion 3 is attached to the worker's lower portion of the lower portion of the main body portion 1 in a state where the waist assist portion 3 protrudes to the left and right more than the lower portion of the main body portion 1.

  As shown in FIGS. 4, 5 and 8, an overhanging portion 10a projecting rearward is formed at a portion of the base 10 opposite to the worker, and the electric motor 29 (corresponding to an electric actuator) is an overhanging portion It is decorated sideways inside 10a.

  A transmission mechanism (not shown) constituted by a plurality of spur gears is provided inside the support 11, and the power of the electric motor 29 is transmitted to the operation arm 12 via the transmission mechanism, and the operation arm 12 Is driven to swing around the horizontal axis P1.

(Shoulder belt and mounting belt, upper pad and lower pad)
As shown in FIGS. 1 and 3, in the main body 1 (support plate 7), two upper pad portions 36 are attached along the vertical direction to the worker side portion of the upper side portion 31. The pad portion 36 protrudes to the worker side. The right and left shoulder belts 5 are attached across a portion between the upper pad portion 36 at the upper portion of the upper side portion 31 and the base portion 10 of the waist assist portion 3.

  As shown in FIGS. 3 and 8, a flexible flat belt base 30 (corresponding to a mounting belt) is attached to the worker's side of the base 10 of the waist support 3. The lower pad portion 37 is attached to the belt base 30 along the left-right direction, and the lower pad portion 37 protrudes toward the worker.

  A flat cover 52 extends upward from the upper side of the belt base 30. As a result, the cover 52 is supported by the lower pad portion 37 via the belt base 30, and the cover 52 extends upward from the lower pad portion 37.

  The lateral side 30 a of the belt base 30 extends forward along the inner side (worker side) of the support 11 of the waist support 3. A lateral pad portion 51 is attached to the portion of the worker of the lateral side 30 a of the belt base 30 and protrudes toward the worker. The mounting belt 4 is extended from the lateral side 30 a of the belt base 30.

  When the main body 1 is attached to the back of the worker as described above (attachment of the assist tool), the upper pad portion 36 is put on the back of the worker as shown in FIGS. 1 and 2. Then, the lower pad portion 37 is abutted against the back of the operator's waist, and the lateral pad portion 51 is abutted against the operator's waist.

  In this case, the lateral side 30 a of the belt base 30 and the lateral pad portion 51 are located between the waist of the worker and the base of the operation arm 12 of the waist support 3. As a result, even if the operation arm 12 swings, the operation arm 12 does not hit the waist of the operator, and thus the operator is less likely to feel discomfort.

(Positional relationship between the opening of the support plate 7 (intermediate part) and each part)
As shown in FIGS. 2, 3, 6 and 7, in the support plate 7, the two openings 32 a are opened at the lower part of the intermediate portion 32 in a line along the left-right direction.

  As shown in FIGS. 2, 3 and 9, the opening 32a of the support plate 7 (intermediate portion 32) is disposed between the control device 8 and the battery 9 and the battery attachment portion 38 in a rear view (front view). , And the upper part of the lower back assistance part 3 (base 10).

  As shown in FIGS. 3, 8 and 9, in the waist support portion 3, the base portion 10 is connected to the worker-side portion of the mounting portion 35, so that the base portion 10 works from the support plate 7 (intermediate portion 32). It protrudes to the elderly person side.

  A flat cover 52 extends upward from the upper side of the belt base 30 (lower pad portion 37), and the cover 52 is on the worker side with respect to the opening 32a of the support plate 7 (intermediate portion 32). It is arranged to face the.

  Thus, a step is produced along the left-right direction by the support plate 7 (intermediate portion 32) and the base 10 of the waist assist portion 3, and the cover 52 causes the opening 32a of the support plate 7 (intermediate portion 32). In the state of being covered, the passage space A1 due to the step is generated between the support plate 7 (the intermediate portion 32) and the cover 52 along the left-right direction.

  As shown in FIGS. 1 and 3, in a front view (rear view), the upper pad portion 36 is positioned above the opening 32 a of the support plate 7 (intermediate portion 32), and the lower pad portion 37 is a support plate 7. It is located below the opening 32a of the (intermediate part 32).

  When the main unit 1 is attached to the back of the worker, the upper pad portion 36 is pressed against the back of the worker and the lower pad portion 37 is pressed against the back of the waist of the worker. A space A2 is generated between the back portion of the support plate 7 and the support plate 7 (intermediate portion 32), and the passage space A1 is disposed in the space A2. Thus, the passing space A1 is not crushed by the back and the waist of the worker.

(A harness connected across the control unit and the electric motor of the waist support)
As shown in FIGS. 5, 8 and 9, the harness 53 connected to the connector 8b of the control device 8 is branched into two lines, and one harness 53 is formed by the control device 8 and the battery attachment portion 38 (battery 9). Through the gap, it enters the right opening 32a of the support plate 7 (intermediate portion 32). The other harness 53 passes between the control device 8 and the battery attachment portion 38 (battery 9) and enters the left opening 32a of the support plate 7 (intermediate portion 32).

  The harness 54 connected to the connector 8c of the control device 8 branches into two systems, and one harness 54 passes between the control device 8 and the battery attachment portion 38 (battery 9) to form the support plate 7 (intermediate portion). 32) enter the right opening 32a. The other harness 54 passes between the control device 8 and the battery attachment portion 38 (battery 9) and enters the left opening 32a of the support plate 7 (intermediate portion 32).

  A cover plate 55 made of a rubber plate in which a slit is formed is attached to the opening 32 a of the support plate 7 (intermediate portion 32), and the harnesses 53 and 54 pass through the slits of the cover plate 55. The holding function of the cover plate 55 hardly causes the harnesses 53 and 54 to shake.

  The harnesses 53 and 54 are guided by the opening 32a of the support plate 7 (intermediate portion 32) and the cover plate 55. As a result, the harnesses 53 and 54 pass between the right and left vertical frames 6 in the main body 1 and do not pass through the lateral outside of the vertical frames 6.

The harnesses 53 and 54 that have come out to the worker side through the right opening 32a of the support plate 7 (intermediate part 32) extend the upper part of the base 10 of the right waist support part 3 to the right along the passage space A1 It has been issued.
The harnesses 53 and 54 that have come out to the worker side through the left opening 32a of the support plate 7 (intermediate part 32) extend the upper part of the base 10 of the left waist support 3 along the passage space A1 to the left It has been issued.

  As shown in FIG. 8 and FIG. 9, in the waist assist portion 3, the support portion 11 is connected to the lateral outer end of the base 10 and extends forward from the base 10, thereby the base 10 and the support portion A space A3 is formed in a portion on the worker side between the base 10 and the support portion 11 so as to be arranged to intersect with each other in a plan view.

  The belt base 30 has the side portions 30a (the lateral pad portion 51 and the mounting belt 4) extending forward along the inner side (worker side) of the support portion 11 of the waist support portion 3 The 30 side portions 30a (the lateral pad portion 51 and the attachment belt 4) are located on the worker side with respect to the space A3.

  Thus, the space A3 is surrounded by the base 10 and the support 11 of the waist support 3 and the lateral side 30a (the lateral pad 51 and the attachment belt 4) of the belt base 30 in a plan view. .

As described above, the harnesses 53 and 54 that have come out to the worker side through the right opening 32a of the support plate 7 (intermediate part 32) move to the right from the passing space A1. It enters into space A3 from the upper part of base 10 (equivalent to the state where harnesses 53 and 54 pass between attachment belts 4 and 30 and waist assistant 3).
The harnesses 53 and 54 are connected to the worker side portion of the base 10 of the right waist assist unit 3, enter the inside of the base 10 of the right waist assist unit 3, and are connected to the electric motor 29.

The harnesses 53 and 54 that have come out to the worker side through the left opening 32a of the support plate 7 (intermediate part 32) come out from the upper part of the base 10 of the left lumbar auxiliary part 3 when going out to the left from the passage space A1. It has entered into space A3 (it corresponds to the state where harnesses 53 and 54 pass between attachment belts 4 and 30 and waist auxiliary part 3).
The harnesses 53 and 54 are connected to the worker side portion of the base 10 of the left waist assist unit 3, enter the inside of the base 10 of the left waist assist unit 3, and are connected to the electric motor 29.

(Working form of assist instrument)
For example, when placing a pallet or a load placed on the floor on a high shelf or truck bed, the operator bends the lower back or bends the knee to drop the lower back, and the load on the pallet or the floor Hold the package with your hand, hold the package with your hand down, extend the waist up or stand up, lift the package with your hand and put the package on a high shelf or truck bed. is assumed.

  A state in which the waist assist portion 3 and the lifting device 17 are operated by the control device 8 based on the pressing operation of the raising operation switch 23 and the lowering operation switch 24 in a state where the worker wearing the assist device performs the above-described work Will be explained.

  As shown in FIGS. 1 and 2, when the worker wears the assist tool, the electric motor 27 of the lifting device 17 is operated unless the worker presses both of the raising operation switch 23 and the lowering operation switch 24. Is stopped, and the electric motor 29 of the waist assist unit 3 is in a stop state (free rotation state).

When the worker walks or when the worker bends the waist downward or bends the knee to drop the waist, the operation arm 12 swings to follow the thigh of the worker. There is no hindrance to the operation of the worker.
Even if the operator performs an operation to open the leg in the left and right direction, the operation arm 12 is freely pivotable in the left and right direction around the axis P2, so the operation of the operator is not impeded. .

When the worker bends the lower back (bends the knee and lowers the lower back) and holds the pallet and the load on the floor, when the operator presses the lowering operation switch 24, the electric motor 27 is moved in the lifting device 17. Actuation to the delivery side, the inners 18a and 19a of the wires 18 and 19 are delivered and the hand portion 20 is lowered.
When the pushing operation of the lowering operation switch 24 is stopped, the electric motor 27 is stopped and the hand unit 20 is stopped, so the operator holds the luggage by the hand unit 20.

  As described in the previous paragraph (Rise operation switch and fall operation switch), the electric motor 27 is provided with an electromagnetic brake (not shown), and the electromagnetic brake is automatically operated when the electric motor 27 is stopped and de-energized. It will be in the braking state.

  When the electric motor 27 is stopped, the inner parts 18a and 19a of the wires 18 and 19 are not fed out from the lifting device 17. The hand part 20 is lowered even if the weight of the load is applied to the hand part 20 as described later. There is nothing to do.

While holding the load by the hand unit 20, the worker lifts the load by extending the waist up (by standing up).
In this case, when the worker pushes the raising operation switch 23, the operation arm 12 is driven downward in the waist assisting unit 3, and the thigh of the worker is operated downward, and the waist is extended upward. Assisting (raising up) assists with raising the lower back.

  The operator stood up after standing up in a state where the operator pressed and operated the raising operation switch 23, and it was detected in the lumbar assist portion 3 that the operation arm 12 had reached a position where the operation arm 12 turned almost directly downward (stand up Is determined, and the electric motor 29 of the waist assist unit 3 is in a stopped state (freely rotating state).

  Next, in the lifting device 17, the electric motor 27 operates on the winding side, the inners 18a and 19a of the wires 18 and 19 are wound up, and the hand unit 20 is raised. When the hand unit 20 ascends to a desired position, the electric motor 27 is stopped by stopping the pressing operation of the raising operation switch 23, and the hand unit 20 is stopped.

  The worker walks and moves to a high shelf, a truck bed, etc. where the luggage should be placed. When the operator arrives at a high rack or truck bed and the like, and the operator pushes the lowering operation switch 24, the electric motor 27 operates in the raising side in the lifting device 17, and the inner 18a of the wires 18, 19 is moved. 19a is drawn out and the hand unit 20 is lowered.

  The operator places the load on a high shelf, a truck bed or the like, and removes the hand unit 20 from the load. When the package is placed on a high shelf or truck bed, it returns to the initial state, and the same operation is performed on the next package.

(State when the assist device is not attached)
In the assist device, since the control device 8 and the lifting device 17 are heavy, the center of gravity of the assist device is located in the vicinity between the control device 8 and the lifting device 17.

As shown in FIGS. 4 and 5, the lower end portion 6 b of the vertical frame 6 protrudes below the waist assist portion 3 (support portion 11). The distance between the right and left waist support portions 3 (support portions 11) is larger than the lateral width of the main body portion 1.
As shown in FIG. 13, when the assist device is placed on the floor or the like, four points at the front end of the lower end portion 6 b of the right and left vertical frames 6 and the support portion 11 of the right and left lumbar assist portions 3 are grounded.

The lower end portion 6b of the vertical frame 6 protrudes downward below the support portion 11 of the waist assist portion 3 so that the assist tool is slightly inclined forward in a side view, and the lower end portion 6b of the vertical frame 6 and the waist assist portion 3 The center of gravity of the assist device is located above the space between the support portions 11 of the above. The center of gravity of the assist device is located above the support 11 of the right and left lumbar assist portions 3 in a front view.
When the assist device is placed on the floor or the like, as described above, the assist device is in a stable and independent state.

(First Embodiment of the Invention)
Three or more openings 32a may be provided, or only one opening 32a may be provided. The openings 32a may be formed not in a circular shape but in an elongated hole shape along the lateral direction, or may be formed in an elongated hole shape along the vertical direction.

The opening 32 a may be provided below the battery attachment portion 38, between the control device 8 and the lifting device 17, or may be provided above the lifting device 17.
When the position of the control device 8, the lifting device 17 and the battery mounting portion 38 is different from that shown in FIGS. 1 to 5, the position of the opening 32a is the control device 8, the lifting device 17 and the battery mounting portion It may be appropriately changed according to the position of 38.

(Second alternative embodiment of the invention)
The cover 52 may be attached directly to the lower pad portion 37, and may extend upward from the lower pad portion 37 toward the opening 32a of the support plate 7 (intermediate portion 32).
The cover 52 may be attached to the upper pad portion 36 and may extend downward from the upper pad portion 36 toward the opening 32 a of the support plate 7 (intermediate portion 32).
The cover 52 may be attached directly to the main body 1 instead of being attached to the upper pad portion 36 and the lower pad portion 37.

(Third alternative embodiment of the invention)
The cover 22 shown in FIGS. 1, 2, 4 and 5 may be eliminated, and the raising operation switch 23 and the lowering operation switch 24 may be provided on the mounting portion 21.

(Fourth alternative embodiment of the invention)
In the assist device, the right and left arms 2 may be eliminated and one arm 2 may be provided.
According to this structure, two wires 18 are extended from one arm portion 2, and the right attachment portion 21 (hand portion 20) is connected to one of the two wires 18. The left mounting portion 21 (hand portion 20) is connected to the other. Alternatively, one wire 18 is extended from one arm portion 2 and the end portion of one wire 18 is bifurcated so that the right attaching portion 21 (hand portion 20) is provided at one of the bifurcated portions. Connect and connect the left attachment portion 21 (hand portion 20) to the other of the branched portions.

(Fifth alternative embodiment of the invention)
The raising operation switch 23 may be provided in the left hand unit 20 (cover unit 22, attachment unit 21), and the lowering operation switch 24 may be provided in the right hand unit 20 (cover unit 22, attachment unit 21). Both the raising operation switch 23 and the lowering operation switch 24 may be provided on one hand portion 20 (cover portion 22 and attachment portion 21) on the right or left.

(Sixth embodiment of the invention)
Lifting device 17, lifting operation switch 23 and lowering operation switch 24 are eliminated, wires 18 and 19 are connected to main body 1 and arm 2, the position of hand 20 is fixed, and lifting and lowering of hand 20 is performed. It may be configured not to perform.
In this case, instead of the wires 18 and 19, an elongated synthetic belt (not shown) (corresponds to a cord) or a metal chain (not shown) (corresponds to a cord) is used. May be

  The assist device of the present invention can be applied to an assist device which is attached to a worker and assists a worker in holding a load.

DESCRIPTION OF SYMBOLS 1 main-body part 2 arm part 3 waist assistance part 4 attachment belt 8 control apparatus 10 base 11 support part 12 operation arm 18, 19 wire (cord-like body)
20 hand part 29 electric actuator 30 belt base (mounting belt)
32a Opening 36 Upper Pad 37 Lower Pad 38 Battery Mounting 52 Cover 53, 54 Harness A1 Passage A3 Space

Claims (8)

A body attached to the back of the worker;
An arm portion extended to the front side from the main body portion;
A cord extending downward from the arm;
A hand connected to the extension end of the cord-like body;
A waist support portion supported by the lower portion of the main body portion to assist raising of the operator's waist;
A control device attached to a portion of the main body opposite to the worker;
The left and right operation arms which are swingably supported by the main body and attached to the thighs of the operator and the electric actuator which swings and drives the left and right operation arms downward to the waist assist portion; Is equipped with
The main body portion is formed with an opening that passes through the worker side and the control device side,
The assist instrument by which the harness which connects the said control apparatus and the said electrically-driven actuator is passed through the said opening part. In the control device side portion of the main body portion, a battery mounting portion is provided below the control device,
The said opening part is an assist instrument of Claim 1 formed in the position between the said control apparatus and the said battery attachment part among the said main-body parts.   The assist device according to claim 1, wherein the plurality of openings are formed in a line along the left-right direction. The waist support portion is attached to a worker-side portion of the lower portion of the main body portion in a state of projecting to the left and right more than the lower portion of the main body portion,
The said opening part is an assist instrument as described in any one of the Claims 1-3 currently formed in the position above the said waist assistance part among the said main-body parts. A base supported by the lower part of the main body in the lower back assistance part, a base extended to the left and right relative to the main body, and a front extending from the base and the operating arm supported swingably The department is equipped
The assist device according to any one of claims 1 to 4, wherein the harness is passed through a space formed by the base and the support.   An upper pad portion which is located above the opening at a worker side portion of the main body and which protrudes to the worker side, and a lower pad which is located below the opening and which protrudes to the worker side The assist device according to any one of claims 1 to 5, further comprising:   7. The assist device according to claim 6, wherein the lower pad portion is provided with a cover which is extended upward to a position facing the opening portion and which forms a passage space of the harness between the lower pad portion and the main body portion. At the lower part of the main body, on the side of the worker, there is provided an attachment belt which is provided along the lower waist support and which is wound around the waist of the worker to attach the main body to the worker.
The assist device according to any one of claims 1 to 7, wherein the harness is passed between the attachment belt and the waist assist portion.

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