JP3621776B2 - Strip body feeding device structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a belt feeding device that restricts refraction in the advancing and retreating direction of the belt and advances and retracts, and a structure of an application device thereof.
[0002]
[Prior art]
Conventionally, a lifting device that moves up and down by placing a posture-changing type nursing bed or baggage is provided with a linear reciprocating motion generating device such as a hydraulic cylinder or a pneumatic cylinder standing or vertically installed at an arbitrary position of the lifting platform. By this operation, the lifting platform or the like is moved up and down or the angle is changed.
[0003]
[Problems to be solved by the invention]
However, the above-described conventional lifting platform requires a cylinder reciprocating motion generator composed of a cylinder and a piston to have a cylinder length that is equal to or greater than the reciprocating distance of the piston. There are drawbacks such as receiving and increasing the weight of the aircraft.
Further, the hydraulic cylinder device requires a hydraulic pump, a switching operation valve, and a driving means consisting of many parts such as a hydraulic tank and piping, which has a problem that the configuration is complicated and the cost is high, and oil leakage is prevented. There are many problems such as requiring complicated maintenance work such as management.
[0004]
[Means for Solving the Problems]
The present invention employs the following means to solve the above-described conventional problems.
First, while the pair of belt bodies 1 having the refraction-preventing restricting members 7 are driven forward and backward by the drive wheels 40 or the drive wheels 40 and the idler wheels 40a that can be rotated forward and backward, the restricting members 7 abut each other. A feeding portion B that engages and regulates refraction in the advancing and retreating direction to advance and retract the operating portion 1a is provided at the corner portion C where the vertical frame 2a and the horizontal frame 2b of the machine body frame 2 intersect with each other. It is characterized by having a belt feeding device structure in which the body 1 is arranged along the vertical frame 2a and the horizontal frame 2b so as to be fed out.
[0005]
Secondly, the vertical frame 2a and the horizontal frame 2b are formed in a hollow shape and are configured in a feeding case in which the belt body 1 is housed so as to be fed out.
[0006]
3rdly, it is characterized by guiding the edge part by the side of the joining side of a pair of control member 7 formed by the delivery of the strip | belt body 1 with the guide member 7G.
[0007]
Fourthly, the lifting platform S is configured by combining a plurality of feeding devices A.
[0008]
Fifth, a plurality of feeding devices A constituting the lifting platform S are connected so as to be able to be bent, and the feeding devices A are individually operated as a pair or as a pair.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. A (A1, A2, A3, A4) shown in FIG. 1 to FIG. 3 is a linear motion according to the present invention in which the operating portion 1a is formed to be extendable and contractable by a pair of belt bodies (chains) 1 and 1 having a regulating member 7. A feeding device constituted by providing a feeding portion B (B1, B2, B3, B4) as a generating device at each corner portion C of frames 21, 22, 23, 24 formed by dividing the body frame 2 into four units. It is.
[0010]
The feeding part B is small and light in place of the conventional linear motion generators of hydraulic and pneumatic cylinders at the four corners of the lifting platform S formed as a bed by the body frame 2 shown as an example of use in FIG. It is configured as an elevating device that can improve the efficiency and handleability.
The lifting platform S can be used as a working machine or a loading rack or the like for placing and lifting an appropriate baggage on its receiving surface. In the illustrated example, the height and posture change can be adjusted. The configuration when used as a bed will be described below.
[0011]
The body frame 2 of the lifting platform (bed) S is divided into rectangular frames 21, 22, 23, and 24 for each corner in plan view, and the upper part of the opposing surface of the adjacent frame is connected with a connecting tool L such as a hinge. The outer corner portion C where the vertical frame 2a and the horizontal frame 2b of each of the frames 21, 22, 23, and 24 intersect with each other is provided by feeding portions B1, B2, and B3 described later in FIGS. , B4 are provided and supported to constitute a series of body frames 2.
Further, the feeding device A is connected to and supported by the feeding device A0 and the universal joint L0 shown in FIG. 4 at the joint portion of each frame 21, 22, 23, 24, that is, at the center of the machine body frame 2. The body frame 2 forms a wide bed-like frame by attaching an auxiliary frame 2S to each of the frames 21, 22, 23, and 24, and a flexible mat M is laid on the upper part of the bed frame. It is comprised so that it may become.
[0012]
As shown in FIG. 4, the central feeding device A0 includes a pair of chains 1 and 1 each having a regulating member 7 in a feeding case 2k wound around driving sprockets (driving wheels) 40 and 40, and a bottom portion. The chain 3 is extended from the supply case 2k by a drive unit 3 including a motor 3M installed on one side of the supply case 2k having a caster 60 and a position stop transmission mechanism 3N that can be driven and stopped by the operation of the motor 3M. 1 and 1 are extended to operate the operating portion 1a formed in a rod shape to extend (retract).
[0013]
That is, the drive unit 3 has a pair of worms 32 and 32 attached to a transmission shaft 31 that is rotated forward and backward from the motor 3M via the worm transmission mechanism 30, and the worms 32 and 32 are attached to the drive sprocket 40 as a shaft. The worm gears 41a, 41a fixed to the input shafts (rotating shafts) 41, 41 are meshed with each other so as to transmit power while constituting the position stop transmission mechanism 3N.
In this case, the chain 1 is wound around the drive sprocket 40 to a length of about one round, and the end link is fixed by the mounting pin 1p.
[0014]
The pair of chains 1 and 1 are connected at their starting ends (heads) to mounting legs 6a and 6a projecting from the plate-like actuating member 6 having the universal joint L0 at a predetermined interval. A mounting portion 12 bent outward is formed on the opposite side of the plate 11 facing each other, and a block-like regulating member 7 is integrally attached to the mounting portion 12 by welding or screwing.
Further, the thickness of the regulating member 7 is the same as the link pitch, and the width is formed wider than the width of the chain 1 so as to constitute the rod-like highly rigid operating portion 1a.
[0015]
When the drive sprocket 40 is rotated forward (in the direction of the solid arrow), the operating portion 1a simultaneously extends and extends the chains 1, 1 meshed with the left and right drive sprockets 40, 40 upward from the supply case 2k. The central part of the actuated member (corresponding to the lifting platform S in the illustrated example) is moved upward via the universal joint LO, and the chain 1, 1 is simultaneously wound by the reverse drive of the drive sprocket 40, and the actuated member is The lowering operation is performed, and the raising and lowering and the operation stop are freely performed.
[0016]
As a result, each chain 1 is regulated inward refraction by the adjacent regulating members 7 joining each other in the advancing and retracting direction, and the right and left regulating members 7 are connected to the chain within the chain interval (predetermined interval). By being face-to-face joined when 1 and 1 are fed out, a rigid columnar actuating portion 1a is formed, which allows the chain 1 to be freely extended by a distance corresponding to the length of storage.
[0017]
At this time, the chain 1 is wound around each drive sprocket 40 with a winding angle θ, and an operating force (load) applied to the connecting member 6, that is, a pressing force when the chain is extended or a tensile force when the chain is contracted. By distributing the force to the teeth 40a... Existing in the winding angle θ of the drive sprocket 40 via the chains 1 and 1, the left and right drive sprockets 40 and 40 are subjected to a large operating force. Furthermore, it has sufficient durability, and the lifting platform S is operated and supported well, and the chains 1 and 1 are smoothly advanced and retracted.
[0018]
Further, a guide 42 made of a plate-like piece formed in a mountain shape is installed between the left and right drive wheels 40, 40 at the opposite central portions of the feeding paths of the chains 1, 1 so as to contact the left and right regulating members 7. Thus, the smooth operation of the chain 1 is promoted, and the load applied to the chain 1 is shared by the guide 42, so that an excessive load is not applied to the sprocket teeth 40a and the high-performance feeding device A0 is obtained. It is composed.
In addition, a base (chain guide) 2G is provided in the supply path of the supply case 2 so as to appropriately guide the advance and retreat operation of the chains 1 and 1.
The regulating member 7 may be provided with a sliding member such as a sliding roller 7R at a portion in contact with the guide 42 so that the chain 1 can be moved back and forth more smoothly.
[0019]
Next, the feeding part B (B1, B2, B3, B4) installed in each corner part C located at the outer ends of the frames 21, 22, 23, 24 will be described. The feeding portion B is configured by applying the same means as the operating portion 1a of the feeding device A0. In this case, the operating portion 1a is formed so as to be capable of advancing and retreating directly below the corner portion C by the configuration described later. Thus, the entire body frame 2 can be moved up and down at the same time, or the frames 21, 22, 23, and 24 can be operated separately or in any combination.
In the present embodiment, the upper portions of the adjacent surfaces of the frames are connected by the connecting tool L, and the lifting platform S is centered in the center in the vertical and horizontal directions of the bed as shown by the dotted lines in FIG. In order to operate each frame separately, each frame is operated by a joint structure that can be engaged and disengaged, or a feeding part that stably supports each frame is installed separately. It is good to do by doing.
[0020]
As shown in FIGS. 3, 5, and 6, the feeding portion B is installed and configured at a corner portion C where the vertical frame 2 a and the horizontal frame 2 a of the body frame 2 formed in a hollow shape with a U-shaped cross section intersect. Along with the vertical frame 2a and the horizontal frame 2a, a pair of strips 1 similar to the strips of the feeding device A0 are housed separately and can be fed out. As a result, the machine body frame 2 serves as the feeding case and the machine housing of the feeding part B, and the rigidity of the machine body is increased, and the machine body is simplified. Each of the feeding devices A1, A2, A3, and A4 is formed by forming a corner portion on the inner side to form a block-shaped frame body that is a rectangular unit body in plan view.
[0021]
Further, the chains 1 and 1 housed in the machine body frames (feed cases) 2 and 2 are provided with a regulating member 7 having a shape to be described later by the same attaching means as the above-described feed device A0, and the tip portion thereof is the feed device. As with A0, they are connected by an operating member 6.
One of the chains 1 and 1 is wound around a drive sprocket 40 that is rotated in the forward and reverse directions by the drive unit 3 installed on the horizontal frame 2b of the machine body frame 2, and the other chain 1 is a driven sprocket that is pivoted on the vertical frame 2a. By wrapping around 40b, the actuating portion 1a is formed by driving of the driving portion 3 so as to be expanded and contracted (advanced / retracted).
The actuating member 6 is provided with a caster 60 at its lower portion so as to be slidable with respect to the floor surface. The drive unit 3 in the illustrated example is generally composed of a commercially available motor 3M and a position stop transmission mechanism (reduction gear with brake) 3N capable of maintaining the drive and stop positions.
[0022]
Further, the above-mentioned feeding case (machine frame) 2 has an L-shaped outer side plate and an inner side plate, and a storage portion 5 for storing the chain 1 in the longitudinal direction is formed in a casing shape, and the feeding case 2 is rigid. A chain guide 2G that is in contact with the chain roller is provided along the sliding side of the inner plate with the chain.
A rotating shaft 41 that pivots the drive sprocket 40 is connected to a metal 2M provided in one feeding case 2 and a driving shaft of the driving unit 3 attached to the inside of the feeding case 2 and is driven. The rotating shaft 41b that pivots the sprocket 40b is supported by the metal 2M, 2M provided in the other feeding case 2, and constitutes a feeding portion B that is supported so that the rotating shafts 41 and 41b are orthogonal to each other. ing.
[0023]
In this case, the restriction members 7 and 7 provided on both the chains 1 and 1 are formed in a substantially triangular shape in plan view, and are fed out along the corner portion C while their opposing surfaces are joined to each other. By rolling and guiding the joint ends near the outer sides of the members 7 and 7 so as to be sandwiched from both sides by a drum-shaped guide roller (guide member) 7G, the actuating portion 1a is It is possible to smoothly advance and retreat in a state in which vibration is prevented and regulated.
[0024]
As a result, when the driving sprocket 40 and the driven sprocket 40b provided in the feeding cases 2 on both sides are rotated forward (in the direction of the solid arrow) as shown in FIG. 5, 5 and 5 are simultaneously extended downward and moved up and down the lifting platform S with the casters 60 of the connecting members 6 provided at the heads (tips) installed on the floor surface, and driving sprockets While the driven sprocket 40a is rotated following by the reverse rotation of 40, the chains 1 and 1 are simultaneously entrained and the lifting platform S is lowered, so that the reciprocating operation and the operation stop can be freely performed similarly to the feeding device A0. it can.
[0025]
At this time, each chain 1 is regulated by the adjacent regulating members 7 joining in the forward and backward direction to each other inward refraction, and the chains 1 and 1 are fed out of the right and left regulating members 7 within the chain interval. The column-shaped actuating portion 1a having rigidity is sometimes formed by face-to-face bonding, and can be freely extended by a distance corresponding to the length of the chain 1 accommodated in the intersecting left and right feeding cases 2 and 2, and the feeding device Along with A0, the elevator S is operated and supported well, and the chains 1 and 1 are smoothly advanced and retracted.
The restricting member 7 is not limited to the shape described above, and may be any member that can be installed in the corner portion C.
[0026]
Next, referring to FIG. 7, a description will be given of a fixing device 20 that removably couples adjacent unit feeding devices A1, A2, A3, and A4. In the connecting frames 2R, 2R of the adjacent feeding devices A, an engaging piece 26 having an engaging hole 25 is suspended so that the engaging holes 25 overlap each other in its normal posture. The locking rod 27 is removably fitted into both the engagement holes 25.
That is, the locking rod 27 is fixed to the one connecting frame 2R by a mounting plate 29 with a solenoid 28 for moving the locking rod 27 forward and backward, and is engaged by a spring 28a that supports the locking rod 27 by the mounting plate 29a. The feeding devices A1, A2, A3, and A4 are fixedly maintained in a normal posture in a substantially horizontal state by being urged in the direction and inserted into the engagement holes 25 in a normal state.
[0027]
Therefore, when each feeding part B is selected and operated simultaneously or independently by operating the control box S1, each fixing device 20 is kept in a fixed state during the entire raising / lowering operation for raising / lowering the entire lifting platform S. At the time of individual lifting operation in which each feeding device A of S is individually or in pairs and tilts up and down with the coupling tools L and L0 as fulcrums, the solenoid 28 of the fixing device 20 corresponding thereto is energized and the locking rod 27 is spring-loaded. By pulling out from the engagement hole 25 against 28a, the desired feeding device A portion is automatically released.
Then, the unrolled feeding device A is freely adjusted in the amount of lifting operation by operating the feeding portion B provided in the corner portion C and extending the chain 1, and the bed (lifting platform) S The posture of the upper body can be changed as desired with a simple operation.
[0028]
In the lifting platform S configured as described above, since the feeding devices A1, A2, A3, and A4 are integrally connected and fixed in the fixed state of the fixing devices 20, the operation of the control box S1 allows When the feeding device A0 and the motor 3M of the feeding portions B1, B2, B3, and B4 are simultaneously rotated forward and backward, the respective operating portions 1a are moved up and down while forming the same amount.
As a result, as shown by the solid line and the dotted line in FIG. 2, the lifting platform S can smoothly perform the lifting operation while maintaining the horizontal posture and can satisfactorily achieve the initial purpose.
Further, at this time, by operating only the feeding portions B on the one side facing each other with equal amounts, the lifting platform S can be freely tilted in the front-rear and left-right directions as indicated by the dotted line P1 in FIG. .
[0029]
When only the feeding devices A1 and A2 are to be lifted and lowered as indicated by the dotted line P2 in the figure, after releasing the fixture 20 between the feeding devices A3 and A4 for fixing them, the feeding devices A1 and A2 side The feeding portions B1 and B2 may be operated. When only the feeding devices A2 and A3 are to be moved up and down as indicated by the dotted line P3 in the figure, after releasing the fixture 20 between the feeding devices A1 and A4 for fixing them, the feeding devices A2 and A3 side The feeding portions B2 and B3 may be operated.
[0030]
Then, the fixed feeding device A that has been unlocked operates the feeding portion B provided at the corner portion C as desired to adjust the extension of the chain 1 to freely change the angle with respect to the other feeding devices A. be able to.
Therefore, the posture of the body on the bed (elevating platform) S can be changed as desired with a simple operation, and the comfort of the bed and the workability such as care can be greatly improved.
[0031]
In this case, the central feeding device A0 can smoothly perform the refraction operation by the universal joint L0. However, when the lifting platform S is small or when the lifting load is small, the feeding device described above is used. A0 may be unnecessary.
In addition, the extending operation unit 1a causes the caster 60 to smoothly slide and move on the floor surface in accordance with the extending operation to erect and tilt the corresponding feeding device A. However, the feeding unit B of each feeding device A is not limited to the above configuration. By connecting to the feeding device A through an appropriate universal joint means such as a long hole slide mechanism, the operation parts 1a are maintained in a vertical posture without moving the casters 60, that is, the leg bases, and are moved forward and backward. May be.
[0032]
In the above operation, the chains 1 and 1 are fed out from the feeding case 2 to sequentially join the regulating members 7 as the drive sprocket 40 rotates in the direction of the solid arrow by the forward rotation of the motor 3M at the corner portion of the lifting platform S. However, the guide roller 7G guides and restricts the movement toward the corner side so that the operating portion 1a is smoothly extended, and the chains 1 and 1 fed out by the reverse rotation of the motor 3M are contracted to quickly enter the body frame 2. Actuated to retract.
[0033]
The actuating portion 1a becomes a rigid columnar member and moves forward and backward. The heads of the chains 1 and 1 are connected to each other by the connecting member 6, and the paired chains 1 face each other. Since the refraction is restricted by the restricting member 7, refraction in the inward and outward directions (opposite direction) is prevented, and the refraction in the lateral direction is prevented by the link joining of the chain 1 and the wide width of the restricting member 7. Since it is prevented by simple joining, the chain rigidity at the time of extension can be created satisfactorily, and the legs of the lifting platform S can be configured firmly.
[0034]
The reciprocating (advancing / retreating) stroke of the operating portion 1a can be freely set by setting the storage length of the chain 1 to an arbitrary length, and the feeding is performed by the rotation of the drive sprocket 40, and the lifting platform Since the feeding portion B is provided at the corner portion C of S, the feeding device A can be manufactured in a simple and inexpensive compact configuration.
The operating force of the operating part 1a can be made as large as the allowable load of the chain used as the feeding part, and it has sufficient durability and can suppress the occurrence of troubles and the like. It is possible to make the bed and other working devices more compact.
Furthermore, the operation of the feeding portion B can be performed as desired with simple electrical wiring, and the speed control can be easily performed, so that the feeding device can be made with a low cost structure and good operability.
[0035]
Further, when the motor 3M is stopped, the position stop transmission mechanism 3N of the drive unit 3 prevents the operation of the chains 1 and 1 in the advancing and retreating directions, so that the operation unit 1a is stopped even when a load is applied to the chains 1 and 1. Maintain the posture accurately and maintain the operating position in place to prevent accidental operation even when the power is cut off due to a power failure or the like when the chains 1 and 1 are moved forward and backward. Can do.
Therefore, the feeding device A configured as described above can be moved up and down satisfactorily and, in the lowered state, does not leave a column portion such as a hydraulic cylinder or the like, unlike a conventional hydraulic lifting device. There are advantages such as various working machines having high convenience in configuration.
[0036]
In addition, the operating portion 1a may be formed with concave and convex portions that mesh with each other on the joint surfaces of the regulating members 7 and 7 to be phase-joined shown in this embodiment. The shape regulating members 7 may be provided so as to be joined together in a hooked state in the extended posture of the chain.
Further, the chain 1 and the regulating member 7 may be made of iron as shown in the embodiment, or may be formed of plastic or ceramic material depending on the application. As a linear reciprocating motion generator used under a polluted environment such as sludge, the durability and reliability can be improved.
Further, in the case of using a plastic material, there is an advantage that it is possible to optimize the installation on a working apparatus, equipment, etc. that requires a reduction in size and weight, and a plurality of regulating members 7 are integrally formed on the belt 1. The cross-sectional shape of the band 1 may be a flat belt shape or a curved V belt.
[0037]
Next, referring to FIG. 8 and FIG. 9, an embodiment in which the feeding device A according to the present invention is used in another usage example will be described.
FIG. 8 shows an example in which the roof frame of the building 9 is configured by the combination of the feeding device A. The machine frame 2 of the feeding device A also serves as the roof frame of the building 9 and is provided at the corner portion C of the machine frame 2. By configuring the operation part 1a of the part B to be a pillar of the building, the entire roof 90 can be moved up and down and tilted by the operation of the feeding part B.
According to this, the roof 90 can be easily assembled or the tent sheet 91 and the like can be assembled to the roof 90 in a state where the feeding portions B are lowered to lower the roof 90, and the roof assembled on the ground. There is an advantage that the building 9 can be simply configured by raising 90 quickly.
[0038]
FIG. 9 shows a flexible film body or plate body such as a sheet on the head of each operating section 1a of an appropriate number of feeding sections B in a state where the above-described feeding device A is installed on the ground or floor in the reverse direction. An embodiment is shown in which a tank (container) 92 is supported and formed so as to be movable up and down.
According to this, in the solid line state, an object to be stored is accommodated in the tank 92, and by simultaneously driving the feeding portions B, the tank 92 can be raised to a desired height while maintaining its shape well. .
[0039]
Further, by further raising the feeding portion (not shown) installed at the center of the tank 92 at this position, only the central portion of the tank 92 can be raised and deformed, and the stored items can be quickly discharged to the outside.
As described above, the feeding device A configured as described above can be used singly or in combination to form a body frame of various structures and devices, and can be widely used as a lifting device or an operating device.
[0040]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
According to the invention of claim 1, the feeding portion can be provided in a compact manner at the corner portion of the body frame along the vertical frame and the horizontal frame along the vertical frame and the horizontal frame, and provided at the corner portion of the body frame. It is possible to prevent the drawn-out portion from becoming a hindrance to other structures.
Further, when the machine frame itself is moved up and down, the feeding parts provided at the corners of the machine body frame restrict or restrict the refraction in the advancing and retreating direction of the belt by causing the regulating members to abut or mesh with each other at the end of the machine frame. Thus, the airframe can be raised and lowered stably and favorably while the operating portion is smoothly advanced and retracted.
Further, it is possible to provide an advance / retreat operation device having a simple and inexpensive configuration that does not leave a column portion such as a hydraulic cylinder, unlike a conventional hydraulic lifting device.
[0041]
According to the invention of claim 2, the vertical frame and the horizontal frame formed in a hollow shape increase the frame rigidity of the machine body frame, and the machine frame is also used as a feeding case for storing a belt having a regulating member so as to be fed out. The belt can be provided compactly without exposing the feeding portion at the corner portion, and the belt can be fed and stored satisfactorily.
[0042]
According to the invention of claim 3, by restricting the guide member of the belt body that is fed out from both the vertical and horizontal frame sides by the guide member, the pair of restricting members can be joined accurately and the operating portion. It is possible to maintain the forward / backward posture of the head.
Moreover, this makes it possible to easily install the feeding portion at the corner portion of the body frame.
[0043]
According to the invention of claim 4, a desired lifting platform can be configured simply and compactly by combining a plurality of feeding devices formed in a unit body shape and connecting the machine body frame.
Further, the combined feeding device can be moved up and down stably and satisfactorily by each operating portion of the feeding portion that moves forward and backward installed in the corner portion.
[0044]
According to the invention of claim 5, the feeding device connected so as to be fixed and refractable can freely control the posture of the lifting platform and simplify the configuration by operating the operating portions of the feeding portions to advance and retract. Can do.
Therefore, it can be suitable for a nursing bed or the like that is required to freely change the posture of the platform.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an operation of a feeding device according to the present invention configured as a lifting platform.
FIG. 2 is a side view of FIG.
FIG. 3 is a plan view showing a configuration of a main part of the lifting platform.
FIG. 4A is a cross-sectional view showing a main part of a central feeding device. (B) is a plane sectional view of an operation part.
FIG. 5 is a cross-sectional plan view showing the configuration of the feeding portion of the present invention.
6 is a side sectional view of FIG. 5;
FIG. 7A is a side view of a fixing device. (B) is a side view of FIG.
FIG. 8 is a perspective view showing another example of use of the feeding device.
FIG. 9 is a perspective view showing still another usage example of the feeding device.
[Explanation of symbols]
1 chain
1a Actuator
2 Airframe (Feeding case)
2a Vertical frame
2b Horizontal frame
3 Drive unit
5 storing section
6 Connecting members
7 Regulatory members
7G guide roller (guide member)
40 Drive sprocket (drive wheel)
40a Driven sprocket (idling wheel)
41 Rotating shaft
A feeding device
B Feeding part
L connector
S Lifting platform

Claims (5)

While the pair of belt bodies (1) having the refraction-preventing restricting member (7) is extended forward and backward by the drive wheel (40) or the drive wheel (40) and the idler wheel (40a) that can rotate forward and backward, The feeding part (B) that makes the member (7) abut or mesh with each other to restrict refraction in the advancing / retreating direction and to move the actuating part (1a) forward and backward, and the vertical frame (2a) and the horizontal frame (2b) of the body frame (2) ) At the corner portion (C) intersecting with each other, and each strip body (1) that is paired with the longitudinal frame (2a) and the lateral frame (2b) so as to be fed out can be fed. Construction. 2. The belt feeding device structure according to claim 1, wherein the vertical frame (2a) and the horizontal frame (2b) are formed into a hollow case and are housed in a feeding case in which the belt body (1) can be housed therein. 3. The belt feeding device structure according to claim 1 or 2, wherein the joining end of the pair of regulating members (7) formed by feeding the belt (1) is guided by the guide member (7G). The belt feeding device structure according to claim 1, 2 or 3, wherein the lifting platform (S) is constituted by combining a plurality of feeding devices (A). 5. The belt feeding device structure according to claim 4, wherein a plurality of feeding devices (A) constituting the lifting platform (S) are connected so as to be able to be bent, and the feeding devices (A) are operated individually or in pairs.

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