JP2019011151A - Assist instrument - Google Patents

Abstract

To suppress wear of a body of rotation or wire of an arm part in an assist instrument for lifting and lowering a hand part by the wire.SOLUTION: An assist instrument includes: a body part to be attached to a back part of an operator; an arm part 2 extending from the body part to a front side; and a lifting device disposed at the body part and for winding and delivering wire 18 and 19. The assist instrument includes: a support member 16 supported by the arm 2 freely changeable in posture around an extension shaft core P2 along an extension direction of the arm part 2; a stationary portion 34 freely fixing and releasing the support member 16 at a prescribed position to the arm portion 2 around the extension shaft core P2; and a body of rotation 15 supported by the support member 16 freely rotatably around a lateral shaft core P3 crossing the extension shaft core P2. The wire 18 and 19 extended from the lifting device are wound to the body of rotation 15 and extended to a lower side. A hand part for holding a baggage is connected to extension ends of the wire 18 and 19.SELECTED DRAWING: Figure 5

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 an assist device as described above, there is one disclosed in Patent Document 1.
In patent document 1, the main body part attached to an operator's back part and the right and left arm part extended to the front side from the main body part are provided. A lifting device is provided in the main body, and right and left wires are extended from the lifting device. A wire extends along the arm portion, is wound around a rotating body on the upper portion of the arm portion, and extends downward, and right and left hand portions are connected to the extending end of the wire.
In a state where the baggage is held in the hand unit, the hand unit (baggage) is raised by winding the wire with the lifting device, and the hand unit (baggage) is lowered by feeding the wire with the lifting device.

  In Patent Document 1, the right hand portion holds the right side portion of the load and the left hand portion holds the left side portion of the load to hold the load. In this case, since the right and left hand portions are suspended by the wires, the right and left hand portions can be arbitrarily set in the left-right direction. Luggage can be held by the left hand part.

JP 2006-129916 A

  In the assist device of Patent Document 1, when holding a load having different widths by the right and left hand portions, if the load has a large width, the wire is moved from the rotating body of the right and left arm portions to the right and left diagonals. It may be in a state of extending outward. On the other hand, if the load is small in width, the wire may extend obliquely inward to the right and left from the rotating bodies of the right and left arm portions.

In the state as described above, the wire does not extend from the rotating body of the arm unit along the rotating direction of the rotating body of the arm unit, but the wire is armed with respect to the rotating direction of the rotating body of the arm unit. It will be in the state extended so that it may cross | intersect diagonally from the rotary body of a part.
Therefore, if the winding and unwinding of the wire are repeated by the lifting device in this state, there is a possibility of developing the wear of the rotating body of the arm part and the wire, so there is room for improvement.

  An object of the present invention is to suppress wear of a rotating body of an arm part and a wire in an assist device that raises and lowers a hand part with a wire.

The assist device of the present invention is
A main body part attached to the back part of the operator, right and left arm parts extending forward from the main body part, and an elevating device provided on the main body part for winding and unwinding the wire are provided. ,
Right and left support members supported by the arm portion, the posture of which can be freely changed around the extending axis along the extending direction of the arm portion;
Right and left fixing parts which can freely fix and release the support member to the arm part at a predetermined position around the extending axis;
A right and a left rotating body supported by the support member so as to be rotatable around a lateral axis intersecting the extending axis;
The right and left wires extended from the lifting device are wound around the rotating body and extended downward from the rotating body, and right and left hand portions for holding a load are provided on the wire. Connected to the extension end,
The lifting device raises the hand portion by winding the wire, and the lifting device lowers the hand portion by feeding the wire.

  According to the present invention, for example, when a large load is held by the right and left hand portions, the right and left sides are extended so that the wires extend obliquely outward to the right and left from the rotating bodies of the right and left support members. The posture of the support member may be changed around the extending axis of the arm portion, and the posture of the support member may be fixed by the fixing portion.

  For example, when holding a small load with the right and left hand parts, the posture of the right and left support members is such that the wires extend diagonally to the right and left from the rotating bodies of the right and left support members. May be changed around the extension axis of the arm portion, and the posture of the support member may be fixed by the fixing portion.

According to the present invention, as described above, by changing the position of the support member and fixing it, the wire can be brought close to a state where the wire is extended from the rotation body of the support member along the rotation direction of the rotation body of the support member. it can.
As a result, when the right and left wires are wound and unwound by the lifting device and the right and left hand portions are raised and lowered, along the rotation direction of the rotating bodies of the right and left support members, The right and left wires are wound and fed out in a state close to the state in which the right and left wires are extended from the rotating member of the support member. It is possible to suppress the durability and improve the durability.

In the present invention,
By fitting the support member to the extension end portion of the arm portion, the support member is supported by the extension end portion of the arm portion so that the posture can be freely changed around the extension axis.
The fixing part is
A spline part attached to the extending end of the arm part;
A spline part attached to the support member;
It is preferable that a retaining member for stopping the supporting member from coming off from the extending end portion of the arm portion is provided in a state where the spline portion of the arm portion and the spline portion of the supporting member are fitted together. .

According to the present invention, the support member is fitted to the extended end portion of the arm portion, and the posture of the support member can be easily changed by rotating the support member around the extended end portion of the arm portion. .
When fixing the posture of the support member, the spline portion of the arm portion and the spline portion of the support member are fitted together, and the support member is prevented from coming off by the retaining member, so that the posture of the support member is fixed without difficulty. be able to.

In the present invention,
By fitting the support member to the extension end portion of the arm portion, the support member is supported by the extension end portion of the arm portion so that the posture can be freely changed around the extension axis.
The fixing part is
An engagement portion provided on one of the extended end of the arm and the support member;
A plurality of engaged portions provided along the circumferential direction on the other of the extended end portion of the arm portion and the support member;
It is preferable that a retaining member for stopping the support member from coming off from the extended end portion of the arm portion in a state where the engaging portion is engaged with the engaged portion.

According to the present invention, the support member is fitted to the extended end portion of the arm portion, and the posture of the support member can be easily changed by rotating the support member around the extended end portion of the arm portion. .
When fixing the posture of the support member, the posture of the support member can be fixed without difficulty by retaining the support member with the retaining member while the engagement portion is engaged with the desired engaged portion. It can be carried out.

In the present invention,
It is preferable that a wire support portion for supporting the wire is provided in a portion of the support member on the lifting device side from the rotating body.

According to the present invention, when the posture of the support member is changed, the posture of the wire support portion of the support member is also changed.
As a result, even in the part on the lifting device side from the rotating body, the wire can be made to follow the rotating direction of the rotating body of the supporting member, and the durability of the rotating body of the supporting member and the wire can be suppressed and durability can be reduced. Can be improved.

It is a right view in a state where an operator wears an assist device. It is a rear view in a state where an operator wears an assist device. It is a perspective view of an assist instrument. It is a perspective view of the vicinity of a support member. It is a vertical side view of the vicinity of a support member. It is a disassembled side view of the extension end part of an arm part, and a supporting member. It is a vertical front view of a support member and a guide part. It is a front view which shows the state of a support member, a pulley, and a wire in the state which hold | maintained the large width | variety load. It is a front view which shows the state of a supporting member, a pulley, and a wire in the state holding the small width | variety load. In 1st another form of implementation of invention, it is an exploded side view of the extension end part of an arm part, and a supporting member. In 1st another form of implementation of invention, it is a side view of the extension end part of an arm part, and a supporting member. In the 2nd another form of implementation of invention, it is an exploded side view of the extension end part of an arm part, and a supporting member. In the 2nd another form of implementation of invention, it is a side view of the extension end part of an arm part, and a supporting member.

  The front-rear direction and the left-right direction in the embodiment of the present invention are described as follows unless otherwise specified. When the operator 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 operator.

(Overall configuration and main body of assist device)
As shown in FIGS. 1, 2, and 3, the assist device includes a main body 1 that is attached to the back of the operator, and right and left arms that extend upward from the upper portion of the main body 1 and extend forward. A right and left leg action part 3 provided at the lower part of the part 2 and the main body part 1 is provided, and an attachment belt 4 for attaching to an operator and right and left shoulder belts 5 are provided.

  As shown in FIGS. 1, 2, and 3, the main body 1 has a frame shape including a right and left vertical frame 6, a support plate 7 connected across the right and left vertical frames 6, and the like. Yes. An attachment belt 4 is attached to the leg action part 3, and a shoulder belt 5 is attached to the upper part of the front surface of the support plate 7. A control device 8 is attached to the upper and lower intermediate portions of the rear surface of the support plate 7, and a battery 9 is attached to the lower portion of the rear surface of the support plate 7.

  As shown in FIG. 1 and FIG. 2, the arm portion (shoulder portion) of the worker is put on the shoulder belt 5, and the attachment belt 4 is wrapped around the waist portion of the worker and fixed, so that the main body portion is attached to the back portion of the worker. 1 is attached.

  As shown in FIGS. 1 and 2, the weight of the assist device and the load B (see FIGS. 8 and 9) mainly hangs on the waist of the operator via the attachment belt 4. Is stably supported by the waist of the operator. The right and left shoulder belts 5 mainly exhibit a function of stopping the state in which the main body 1 is about to move backward from the back of the operator.

(Right and left leg action parts)
As shown in FIGS. 1, 2, and 3, the leg action unit 3 includes a base 10, a transmission case 11, an operation arm 12, a leg belt 13, and the like. A base portion 10 is supported at the lower portion of the support plate 7 so as to be slidable in the left-right direction, and a transmission case 11 is connected to an outer end portion of the base portion 10 in a forward direction.

  As shown in FIGS. 1, 2, and 3, an operation arm 12 is swingably supported around a horizontal axis P <b> 1 in the left-right direction at the front portion of the transmission case 11, and a wide belt-like leg belt 13 is formed. It is attached to the operation arm 12. A transmission mechanism (not shown) constituted by a plurality of spur gears is provided in the transmission case 11, and an electric motor (not shown) is provided in the base 10, and the transmission mechanism is provided by the electric motor. The operating arm 12 is driven to swing around the horizontal axis P1.

When attaching the main body 1 to the operator's back, the right and left leg action units 3 (base 10) are supported together with the attachment belt 4 when the operator wraps and fixes the attachment belt 4 around the waist. It can move in the left-right direction along the plate 7.
Thus, the interval between the right and left leg action portions 3 is determined so as to match the physique of the operator depending on how the attachment belt 4 is wound around the waist, and the right and left leg action portions 3 are determined by the attachment belt 4. The position is determined.

Thereafter, as shown in FIGS. 1 and 2, the operator wraps the leg belt 13 around the thigh portion and attaches the leg belt 13 to the thigh with a hook-and-loop fastener (not shown) (magic tape (registered trademark)). Attach to the part.
In a state in which the worker wears the assist device, the right leg operating unit 3 (transmission case 11) is positioned on the right side of the operator's waist, and the left leg operating unit 3 (transmission case 11) is positioned on the left side of the operator's waist. ) Is located.

(Right and left arm)
As shown in FIGS. 1, 2, and 3, the upper portions of the right and left vertical frames 6 extend obliquely upward and extend obliquely forward beyond the right and left shoulders of the operator, It is the left arm 2. As shown in FIGS. 4 and 5, the right and left support members 16 are supported by the extended end portion 2 a of the arm portion 2, and the right and left pulleys 15 (corresponding to a rotating body) rotate to the support member 16. It is supported freely.

  As shown in FIGS. 1, 2, and 3, an elevating device 17 is attached to the upper portion of the rear surface of the support plate 7, and the right two wires 18 and 19 and the two left wires are connected from the elevating device 17. 18 and 19 are extended. An outer support portion 21 is connected to the upper portion of the support plate 7, and an outer support portion 16 c (corresponding to a wire support portion) is provided on the support member 16. The ends of the outer wires 18 b and 19 b are connected to the outer support portion 21 and the outer support portion 16 c of the support member 16, and the inner wires 18 and 19 are connected to the lifting device 17. .

As shown in FIGS. 1, 2, 3, 5, the inner wires 18, 19 a of the right two wires 18, 19 are hung on the right pulley 15 and extended downward. The right hand portion 20 is connected to the extending ends of the inners 18a, 19a of the wires 18, 19.
Inners 18a, 19a of the two left wires 18, 19 are hung on the left pulley 15 and extended downward, and the extending ends of the inner wires 18, 19a of the two left wires 18, 19 are extended. In addition, the left hand unit 20 is connected.

(Hand part)
As shown in FIGS. 1 and 2, the right and left hand portions 20 are formed in a hook shape by bending a plate material, and have a bilaterally symmetric shape. The right hand unit 20 is provided with a raising operation switch 23, and the left hand unit 20 is provided with a lowering operation switch 24.

  As shown in FIGS. 1, 2, and 3, the harness 14 connected to the control device 8 enters the inside of the arm portion 2 from the upper and lower intermediate portions of the right and left arm portions 2, and passes through the inside of the arm portion 2. The arm portion 2 extends to the extended end 2a (see FIG. 5). The harness 14 extends from the opening of the extended end 2a of the right and left arm portions 2 and extends downward, and the harness 14 is connected to the ascending operation switch 23 and the descending operation switch 24.

  As shown in FIGS. 1 and 2, in a state where the operator wears the assist device, the operator holds the right hand unit 20 with the right hand and holds the left hand unit 20 with the left hand. Have. In this state, the operator pushes and operates the ascending operation switch 23 and the descending operation switch 24 with the thumbs of the right hand and the left hand.

  As shown in FIGS. 1 and 2, the ascending operation switch 23 and the descending operation switch 24 are returnable. When the operator presses the ascending operation switch 23 and the descending operation switch 24, operation signals are output from the ascending operation switch 23 and the descending operation switch 24, and the operator presses the ascending operation switch 23 and the descending operation switch 24. When the operation is stopped, the operation signals of the ascending operation switch 23 and the descending operation switch 24 are stopped.

(lift device)
As shown in FIGS. 1 and 2, the lifting device 17 is connected to the support plate 7. A vertically extending transmission case 25 that houses a transmission mechanism (not shown), a support case 26 that is laterally coupled to the upper portion of the transmission case 25, an electric motor 27 that is laterally coupled to the lower portion of the transmission case 25, and a support case 26 The lifting device 17 is provided with four rotating bodies (not shown) that are rotatable around a laterally oriented axis.

  As shown in FIGS. 1 and 2, the ends of the outer wires 18, 19 b of the right and left wires 18, 19 are connected to the outer support portion 21, and the inner wires 18, 19 of the inner wires 18 a, 19 a are connected to the support case 26. It is connected to each of the four internal rotating bodies.

  With the above structure, as shown in FIGS. 1 and 2, 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.

As shown in FIGS. 1, 2, and 3, when the raising operation switch 23 is pushed, the electric motor 27 rotates the rotating body to the winding side, and the inner wires 18, 19 a of the wires 18, 19 are wound on the rotating body. As a result, the hand unit 20 rises.
When the lowering operation switch 24 is pushed, the electric motor 27 rotates the rotating body toward the feeding side, the inners 18a and 19a of the wires 18 and 19 are drawn out from the rotating body, and the hand unit 20 is lowered.

  When the push operation of the ascending operation switch 23 and the descending operation switch 24 is stopped, the electric motor 27 is stopped. The electric motor 27 is provided with an electromagnetic brake (not shown). The electromagnetic brake is automatically released when the electric motor 27 is operated, and the electromagnetic brake is automatically braked when the electric motor 27 is stopped or not energized. It becomes a state.

(Configuration of the support member at the extended end of the arm)
As shown in FIGS. 4, 5, and 6, the right and left support members 16 are supported on the extended end portions 2 a of the right and left arm portions 2.

  As shown in FIGS. 4 and 5, the support member 16 includes a semicircular support portion 16a, a columnar mounting portion 16b, an outer support portion 16c, an opening portion 16d, and a nut in a side view in which the lower portion is opened. The support portion 16e is provided and is integrally formed.

  As shown in FIGS. 5 and 6, a spline portion 28 having a spline formed on the inner surface of a cylindrical member is provided, and the spline portion 28 is attached to the inner surface of the attachment portion 16 b of the support member 16. A nut 29 is inserted from an opening at the end of the nut support portion 16 e of the support member 16, and the nut 29 is attached to the inside of the nut support portion 16 e of the support member 16.

  As shown in FIGS. 5 and 6, a spline portion 30 having a spline formed on the outer surface of a cylindrical member is provided, and at the extended end 2 a of the right and left arm portions 2, a little rear side (lower The spline part 30 is attached to the part of the side.

  As shown in FIGS. 4, 5, and 6, the extension end 2 a of the arm 2 is connected to the support member 16 from the direction toward the extension axis P <b> 2 along the extension direction of the extension 2 a of the arm 2. Inserting into the attachment portion 16b, the attachment portion 16b of the support member 16 is fitted into the extended end portion 2a of the arm portion 2.

  As shown in FIGS. 5 and 6, by rotating the support member 16 around the extension axis P <b> 2 before the spline portion 30 of the arm portion 2 and the spline portion 28 of the support member 16 are fitted together. The attitude of the support member 16 is changed around the extended axis P2.

  As shown in FIGS. 4, 5, and 6, the extended end 2 a of the arm portion 2 is further inserted into the mounting portion 16 b of the support member 16, and the spline portion 30 of the arm portion 2 and the spline portion 28 of the support member 16 Are fitted together to determine the attitude of the support member 16 around the extended axis P2.

  As shown in FIGS. 4 and 5, the bolt 31 (corresponding to a retaining member) is inserted into the nut 29 from the opening of the nut support portion 16 e of the support member 16, and the mounting portion 16 b (spline portion 30) of the support member 16 is inserted. The support member 16 is prevented from coming off from the extended end portion 2a of the arm portion 2 by being applied to the spline portion 28 of the arm portion 2 and tightening the bolt 31 from the opening portion of the arm portion 2).

  As described above, the fixing portion 34 that fixes the support member 16 at a predetermined position (predetermined posture) around the extended axis P <b> 2 is provided between the arm portion 2 and the support member 16. As shown in FIGS. 4, 5, and 6, the fixing portion 34 includes a spline portion 30 of the arm portion 2, a spline portion 28 of the support member 16, a bolt 31, a nut 29, and the like.

(Pulley supported by the support member)
As shown in FIGS. 4, 5, and 7, the support shaft 22 is supported laterally on the support portion 16 a of the support member 16 so as to intersect (orthogonal) the extension shaft core P <b> 2, and the rotation shaft core of the support shaft 22 is supported. A pulley 15 is supported around P3 (corresponding to a lateral axis) so as to be freely rotatable.

  As shown in FIGS. 4, 5, and 7, the pulley 15 is formed wide, and two groove portions 15 a and 15 b are formed on the outer peripheral portion of the pulley 15 along the circumferential direction, and the groove portions 15 a and 15 b rotate. It forms so that it may align along the direction of the axial center P3.

  As shown in FIGS. 1, 2, and 3, the right wires 18 and 19 extend along the right arm portion 2, and as shown in FIGS. 5 and 7, the outer wires of the right wires 18 and 19 are outer. End portions of 18 b and 19 b are connected to the outer support portion 16 c of the support member 16 by a nut 32. As a result, the outer support portion 16c of the support member 16 is provided in a portion of the support member 16 on the lifting device 17 side from the pulley 15.

As shown in FIGS. 5 and 7, the inner wires 18, 19 a of the right wires 18, 19 enter the inside of the support portion 16 a of the support member 16 through the opening portion 16 d of the support member 16. The inner 18 a of the right wire 18 enters the groove 15 a of the pulley 15, the inner 19 a of the right wire 19 enters the groove 15 b of the pulley 15, and the inner 18 a, 19 a of the right wires 18, 19 enters the pulley 15. It is wound and extended downward.
Similar to the right wires 18 and 19, the left wires 18 and 19 are also attached to the left arm portion 2, the support member 16, and the pulley 15, and extend downward.

(Guide part attached to the support member)
As shown in FIGS. 4, 5, 6, and 7, right and left guide portions 33 are attached to lower portions of the support portions 16 a of the right and left support members 16. The upper portion of the pulley 15 is covered by the support portion 16a of the support member 16, the lower side of the pulley 15 is covered by the guide portion 33, and the entire pulley 15 is covered by the support portion 16a and the guide portion 33 of the support member 16. It is in a state.

  As shown in FIGS. 4, 5, and 7, the guide portion 33 is formed in an arc shape in a side view so as to follow the lower portion of the support portion 16 a of the support member 16 and the outer peripheral portion of the pulley 15. Two long holes 33 a and 33 b are opened in the guide portion 33.

  As shown in FIGS. 5 and 7, in the state where the guide portion 33 is attached to the lower portion of the support portion 16 a of the support member 16, the guide portion 33 is arranged so as to face the lower side of the groove portion 15 a of the pulley 15. The long hole 33b of the guide part 33 is located so that the long hole 33a is located and faces the lower side of the groove part 15b of the pulley 15.

As shown in FIGS. 5 and 7, the elongated holes 33a and 33b of the guide portion 33 are provided in the guide portion 33 so as to be aligned along the direction of the rotation axis P3. 15 grooves 15a and 15b).
In the right and left guide portions 33, the inner 18 a of the wire 18 passes through the long hole 33 a of the guide portion 33, and the inner 19 a of the wire 19 passes through the long hole 33 b of the guide portion 33.

(Holding luggage by hand)
FIG. 8 shows a case where the right hand portion 20 holds the right side portion of the load B, the left hand portion 20 holds the left side portion of the load B, and the right and left hand portions 20 hold the load B. As described above, it is assumed that the lateral width W2 of the load B is larger than the horizontal interval W1 between the right and left support members 16 (pulleys 15).

  In the state shown in FIG. 8, the right and left support members 16 (pulleys) are arranged such that the inners 18 a and 19 a of the wires 18 and 19 extend diagonally outward from the right and left from the pulleys 15 of the right and left support members 16. The posture of 15) may be changed around the extension axis P2 and fixed.

  As shown in FIG. 9, when the lateral width W2 of the load B is smaller than the left-right distance W1 between the right and left support members 16 (pulleys 15), the wires 18 from the pulleys 15 of the right and left support members 16 , 19 so that the right and left support members 16 (pulleys 15) are changed around the extension axis P2 and fixed so that the inner 18a and 19a extend diagonally to the right and left. Good.

  Thereby, as shown in FIGS. 8 and 9, the inners 18a and 19a of the right and left wires 18 and 19 are moved along the rotation direction of the right and left pulleys 15 (direction orthogonal to the rotation axis P3). It can approach the state extended from the right and left pulley 15.

  In the state shown in FIGS. 8 and 9, as described in the above-mentioned (elevating device), the electric motor 27 winds and feeds the inners 18 a and 19 a of the right and left wires 18 and 19, When the right and left hand portions 20 are raised and lowered, the inners 18a and 19a of the right and left wires 18 and 19 along the rotation direction of the right and left pulleys 15 (the direction orthogonal to the rotation axis P3). In a state close to the state in which the wire is extended from the pulley 15, the inner wires 18a and 19a of the right and left wires 18 and 19 are wound and fed out.

(Working form of assist device)
For example, when a load B placed on a pallet or floor is placed on a high shelf or truck bed, the operator squats down and holds the load B on the pallet or floor with his hand and then extends his hand down. It is assumed that the user stands up while holding the load B, then lifts the load B by hand, and places the load B on a high shelf or truck bed.

  In a state where the worker wearing the assisting device performs the above-described work, the control device 8 controls the right and left leg action units 3 and the lifting device 17 based on the pressing operation of the lifting operation switch 23 and the lowering operation switch 24. The state in which will operate will be described.

  As shown in FIGS. 1 and 2, the electric motor 27 of the elevating device 17 is operated unless the operator pushes both the ascending operation switch 23 and the descending operation switch 24 in a state where the operator wears the assist device. Stops, and the electric motors of the right and left leg action portions 3 are stopped (freely rotated).

  When the worker walks, or when the worker bends the knee and drops the waist (when squatting), the operation arm 12 swings so as to follow the thigh of the worker. Will not be disturbed.

  When the worker crouches and holds the pallet or the floor load B, when the worker pushes the lowering operation switch 24, the electric motor 27 is actuated to the feeding side in the lifting device 17, and the inner wires 18a, 19a, 19a is extended and the hand part 20 descends. When the push operation of the lowering operation switch 24 is stopped, the electric motor 27 is stopped and the hand unit 20 is stopped, so that the operator holds the load B by the hand unit 20.

As described in the previous section (elevating device), the electric motor 27 is provided with an electromagnetic brake (not shown), and the electromagnetic brake automatically enters a braking state when the electric motor 27 is stopped or not energized. .
In the state where the electric motor 27 is stopped, the inner portions 18a and 19a of the wires 18 and 19 are not drawn out from the lifting device 17, and the hand portion 20 does not move even if the weight of the load B is applied to the hand portion 20 as will be described later. It will not descend.

  Next, the worker lifts the luggage B by standing up while holding the luggage B by the hand unit 20. When the operator pushes the lifting operation switch 23, the operating arm 12 is driven downward in the leg action unit 3, and the operator's thigh is operated downward, thereby assisting the worker to stand up. . When the worker stands up, the hand unit 20 is not lowered by the brake function of the electric motor 27.

  After the operator has started up in a state in which the operator presses the ascending operation switch 23, when the leg action unit 3 detects that the operating arm 12 has reached a position substantially directly below, it is determined that the operator has completely started up. Thus, the electric motor of the leg action unit 3 is in a stopped state (free rotation state).

  Next, in the lifting / lowering device 17, the electric motor 27 operates to the winding side, the inner portions 18a, 19a of the wires 18, 19 are wound, and the hand portion 20 is raised. When the hand unit 20 rises to a desired position, the push operation of the raising operation switch 23 is stopped, whereby the electric motor 27 is stopped and the hand unit 20 is stopped.

  Next, the worker walks to a high shelf on which the luggage B is to be placed, a truck bed, or the like. When the worker arrives at a high shelf, a truck bed, etc., and the operator pushes the lowering operation switch 24, the electric motor 27 is actuated to the feeding side in the elevating device 17, and the inner wires 18a, 19a, 19a is extended and the hand part 20 descends.

  The operator places the luggage B on a high shelf, a truck bed or the like, and removes the hand unit 20 from the luggage B. When the luggage B is placed on a high shelf, a truck bed or the like, the initial state is restored, and the same operation is performed on the next luggage B.

(First embodiment of the invention)
Instead of the above-described fixing portion 34 (for carrying out the invention), a fixing portion 34 as shown in FIGS. 10 and 11 may be provided.

  The spline portion 30 of the arm portion 2 and the spline portion 28 of the support member 16 shown in FIGS. 5 and 6 are not provided, and a projecting engagement portion 16f is provided at the end of the mounting portion 16b of the support member 16. Is provided.

  A ring-shaped engaged member 35 is attached to the extended end 2 a of the arm portion 2, and the engaged members are arranged such that a plurality of recessed engaged portions 35 a are arranged along the circumferential direction. 35. The nut support part 16e of the support member 16 shown in FIG.5 and FIG.6, the nut 29, and the volt | bolt 31 are provided.

  The extension end 2a of the arm part 2 is inserted into the mounting part 16b of the support member 16 from the direction toward the extension axis P2 along the extension direction of the extension end 2a of the arm part 2, and the arm part 2 The mounting portion 16b of the support member 16 is fitted to the extended end portion 2a.

  Before the engagement portion 16f of the support member 16 is engaged with the engaged member 35, the support member 16 is rotated around the extension axis P2 to change the posture of the support member 16 to the extension axis P2. Change around.

  By further inserting the extended end portion 2a of the arm portion 2 into the mounting portion 16b of the support member 16 and engaging the engaging portion 16f of the support member 16 with the engaged portion 35a of the engaged member 35, The posture of the support member 16 around the extension axis P2 is determined.

  The bolt 31 is inserted into the nut 29 from the opening of the nut support portion 16e of the support member 16, and is applied to the outer surface of the extended end portion 2a of the arm portion 2 from the opening portion of the mounting portion 16b of the support member 16. By tightening the bolt 31, the support member 16 is prevented from coming off from the extended end portion 2 a of the arm portion 2.

As described above, the fixing portion 34 that fixes the support member 16 at a predetermined position (predetermined posture) around the extended axis P <b> 2 is provided between the arm portion 2 and the support member 16. The fixing portion 34 includes an engaged member 35 (an engaged portion 35a) of the arm portion 2, an engaging portion 16f of the support member 16, a bolt 31, a nut 29, and the like.
In this case, the engaged member 35 (the engaged portion 35a) may be attached to the attachment portion 16b of the support member 16, and the engaging portion 16f may be attached to the arm portion 2.

(Second embodiment of the invention)
Instead of the above-described fixing portion 34 (mode for carrying out the invention), a fixing portion 34 as shown in FIGS. 12 and 13 may be provided.

  The spline portion 30 of the arm portion 2 shown in FIGS. 5 and 8 and the spline portion 28 of the support member 16 are not provided, but the nut support portion 16e and the nut 29 of the support member 16 shown in FIGS. 31 is provided.

The extension end 2a of the arm part 2 is inserted into the mounting part 16b of the support member 16 from the direction toward the extension axis P2 along the extension direction of the extension end 2a of the arm part 2, and the arm part 2 The mounting portion 16b of the support member 16 is fitted to the extended end portion 2a.
By rotating the support member 16 around the extension axis P2, the posture of the support member 16 is changed around the extension axis P2.

  The bolt 31 is inserted into the nut 29 from the opening of the nut support portion 16e of the support member 16 in a state where the posture of the support member 16 around the extended shaft P2 is determined, and the opening of the mounting portion 16b of the support member 16 is opened. The posture of the support member 16 around the extension axis P2 is fixed by applying the bolt 31 to the outer surface of the extension end portion 2a of the arm portion 2 and tightening the bolt 31. So as not to come out of the extended end 2a.

  As described above, the fixing portion 34 that fixes the support member 16 at a predetermined position (predetermined posture) around the extended axis P <b> 2 is provided between the arm portion 2 and the support member 16. The fixed part 34 includes a bolt 31 and a nut 29.

(Third Another Embodiment of the Invention)
In the above-mentioned (Mode for Carrying Out the Invention) (First Another Mode for Carrying Out the Invention) (Second Another Mode for Carrying Out the Invention), the outer diameter of the extended end 2a of the arm portion 2 is determined by the support member 16 The mounting portion 16b may be configured to have a larger diameter than the outer diameter of the mounting portion 16b, and the mounting portion 16b of the support member 16 may be inserted into the extended end portion 2a of the arm portion 2. According to this configuration, the bolt 31, the nut 29, and the like are provided on the extended end portion 2 a of the arm portion 2.

The ascending operation switch 23 may be provided in the left hand unit 20 and the descending operation switch 24 may be provided in the right hand unit 20. Both the raising operation switch 23 and the lowering operation switch 24 may be provided in one of the right and left hand units 20.
In addition to the configuration shown in FIGS. 1 and 2, the hand unit 20 may have various shapes such as a hook shape for hanging the load B, a pair of arms for holding the load B, and the like.
The assist device may be configured not to include the right and left leg action portions 3.

  INDUSTRIAL APPLICABILITY The present invention is used by an operator and can be applied to an assist device that assists an operator in raising and lowering a load.

DESCRIPTION OF SYMBOLS 1 Main body part 2 Arm part 2a Extension end part 15 Rotating body 16 Support member 16c Wire support part 16f Engagement part 17 Lifting device 18, 19 Wire 20 Hand part 28 Spline part 30 Spline part 31 Retaining member 34 Fixing part 35a Covered Engagement part B Luggage P2 Extension shaft core P3 Horizontal shaft core

Claims (4)

A main body part attached to the back part of the operator, right and left arm parts extending forward from the main body part, and an elevating device provided on the main body part for winding and unwinding the wire are provided. ,
Right and left support members supported by the arm portion, the posture of which can be freely changed around the extending axis along the extending direction of the arm portion;
Right and left fixing parts which can freely fix and release the support member to the arm part at a predetermined position around the extending axis;
A right and a left rotating body supported by the support member so as to be rotatable around a lateral axis intersecting the extending axis;
The right and left wires extended from the lifting device are wound around the rotating body and extended downward from the rotating body, and right and left hand portions for holding a load are provided on the wire. Connected to the extension end,
An assisting device that raises the hand part when the lifting device winds the wire, and lowers the hand part when the lifting device feeds the wire. By fitting the support member to the extension end portion of the arm portion, the support member is supported by the extension end portion of the arm portion so that the posture can be freely changed around the extension axis.
The fixing part is
A spline part attached to the extending end of the arm part;
A spline part attached to the support member;
2. A retaining member for stopping the supporting member from coming off from the extending end portion of the arm portion in a state where the spline portion of the arm portion and the spline portion of the supporting member are fitted together. The assist device described. By fitting the support member to the extension end portion of the arm portion, the support member is supported by the extension end portion of the arm portion so that the posture can be freely changed around the extension axis.
The fixing part is
An engagement portion provided on one of the extended end of the arm and the support member;
A plurality of engaged portions provided along the circumferential direction on the other of the extended end portion of the arm portion and the support member;
The assist device according to claim 1, further comprising: a retaining member that stops the supporting member from coming off from the extended end portion of the arm portion in a state where the engaging portion is engaged with the engaged portion. .   The assist device according to any one of claims 1 to 3, wherein a wire support portion that supports the wire is provided in a portion of the support member on the lifting device side from the rotating body.

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