JPH0220256B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a belt transfer device for extracting and transferring stationary objects, and more specifically, to a belt transfer device for pulling out and transferring stationary objects, and more specifically for a belt transfer device for extracting and transferring a stationary object, and more specifically for a belt transfer device for extracting and transferring stationary objects. This invention relates to a belt transfer device that performs transfer.

<Conventional technology> Generally speaking, when moving a heavy object that would be difficult to do manually, the easiest and most familiar method would be to lift the object directly and transfer it to a trolley. Even the basic operation of lifting and transferring becomes difficult when there is no part to grip or hook onto the object itself, or when there is a risk of damage if a concentrated load is applied to the part. In this case, the first method that comes to mind is to insert a thin plate with an easy-to-grip handle on the end between the object and the surface that supports its weight, and then gradually shift the object and place it on the plate. This is a primitive method, but it works surprisingly well. This situation is the first
Shown in Figure a. In this case, 1 is a thin plate, and 4 is a surface that supports object A. At this time, the most important problem is the frictional forces Ff and Ff' generated between the object A and the thin plate 1 and between the thin plate 1 and the support surface 4. Because of this frictional force, it is necessary to apply a propulsive force Fp toward the object A to the thin plate 1, and at the same time apply a force Fa corresponding to Ff to the object A. However, it cannot be used if applying force to object A causes problems. On the other hand, by interposing a deformable belt-like member between the thin plate and the object along the plate, the friction between the object and the thin plate can be reduced to substantially zero. This state is shown in FIG. 1b. In this case, 2 is a belt, 1 is a thin plate, 4 is a supporting surface, and A is an object as described above. This belt 2 is fed from the left side (as shown) to the lower part of the thin plate 1 as the thin plate 1 advances. At this time, if the feeding speed of the belt 2 is twice the traveling speed of the thin plate 1, the belt 2 will proceed to the right while winding around the thin plate 1. Therefore, the speed of the upper belt 2 in contact with the object A becomes substantially zero, the relative speed between the object A and the belt 2 is also zero, and no friction occurs between the object A and the belt 2. That is, the relative motion between the object A and the thin plate 1 is replaced by the relative motion between the belt 2 and the thin plate 1 (for example, this can be understood by inserting your hand under the carpet and easily lifting the furniture). Of course, it is necessary to use a belt made of a material with a small coefficient of friction so as to minimize the frictional force Ffb between the belt 2 and the thin plate 1, and to prevent the propulsive force Fp from becoming too large.

Incidentally, in this case, friction between the belt 2 and the support surface 4 still exists, but when friction between the belts must be avoided or when the form of the support surface does not allow it, the above idea can be further advanced and the friction shown in FIG. Possible methods of transferring objects are as follows. This uses two thin plates, 1a and 1b are the upper thin plate and the lower thin plate, which are stacked parallel to each other with a spacer 5 in between, and the upper thin plate 1a has a belt 2a attached to the lower thin plate 1b. A belt 2b is wound around the belt 2b, and the belt 2b is fed from the left side to both the thin plates 1a and 1b at a feeding speed twice as fast as the advancing speed of the thin plates. It can be seen that at this time, the friction between the belt and the object and between the belt and the supporting surface becomes zero.

Most conventional object transfer devices are based on the transfer method shown in FIG. 1c just described. That is, in order to scoop up an object, a common method is to insert a belt stand around which a belt is wound between the object and a support surface. However, in order to realize this method, a driving mechanism for the belt stand and a belt feeding mechanism are required, and there are various specifications in this respect.

For example, FIGS. 2a, 2b, and 2c show the basic operation of an object transfer device in which the drive mechanism for the belt stand and the belt feeding mechanism are omitted. This belt stand 6 has a double structure in which plate-like bodies 1a and 1b corresponding to the thin plates are stacked together with a spacer 5 interposed therebetween, and belts 2a and 2b are respectively wound around the outer periphery of the plate-shaped bodies 1a and 1b. In this case, belt 2a,
2b is endless and is configured to rotate around the plate-like bodies 1a and 1b in some way. Further, the belt stand 6 is slidably supported by the transport trolley 3, and is designed to receive propulsive force and traction force from an appropriate drive device so that the object A to be transferred can be moved in the horizontal direction. . It is assumed that the object A is initially placed on a support stand 8 having a support surface 4 of an appropriate height. Therefore, the trolley 3 has a height adjustment function to adjust the belt stand 6 to the support stand 8. FIG. 2a shows a state in which the belt stand 6 is brought closer to the object A in order to scoop the object A onto the belt stand 6. At this time, the height of the belt stand 6 is adjusted so that the lower surface of the belt 2b on the lower side of the belt stand 6 contacts the support surface 4 of the support stand 8, and furthermore, the lower belt 2b does not cause friction with the support surface 4. Rotate clockwise around the plate-like body 1b (as shown). The circumferential speed of this rotation is adjusted to be equal to the forward movement speed of the belt stand 6. In the same figure, the composite speed of this rotation and the forward movement speed is shown by an arrow (marked if the speed is zero), but this is a relative speed to a stationary body, and therefore, it is a support for the lower belt 2b. The velocity of the part in contact with surface 4 is zero, plate-like body 1a
The speed of the portion stored between and 1b is twice the forward movement speed of the belt stand 6. FIG. 2b shows a state in which the belt stand 6 intervenes between the object A and the support surface 4 and scoops up the object A. At this time, in addition to the rotation of the lower belt 2b, the upper belt 2a also rotates. however,
The direction of rotation is counterclockwise. Further, the circumferential speed of rotation is equal to the linear speed of the belt stand 6, and for the same reason as the lower belt 2b, the speed of the upper surface of the upper belt 2a is zero, and the portion stored between the plates 1a and 1b is the belt. The speed is twice the forward movement speed of the platform 6. FIG. 2c shows a state in which the belt stand 6 has scooped up the object A and brought it back to the transport trolley 3. In this case, the belt stand 6 receives the traction force from the cart 3 and moves backward, and the lower belt 2b rotates counterclockwise at the same circumferential speed as the backward movement speed of the belt to avoid friction with the support surface 4. do. After completing this operation, the object A is moved toward the trolley 3 and placed thereon. In addition, when transferring the object A on the trolley 3 to another support stand (not shown), it is sufficient to perform the scooping operation and the reverse operation described above. Although a mechanism is required,
In this regard, various methods have been proposed in the past.

That is, the ones shown in Figure 3 a, b, and c are
No. -3373, this is a simple object transfer device equipped with only a mechanism for driving the belt table forward and backward, and the main body of the belt table 6 is integrated with the plate-like bodies 1a and 1b.
Endless belts 2a and 2b wound around the plate-like bodies 1a and 1b, respectively, are rotated smoothly using rollers 9 built into the belt stand 6, rollers 10 attached to the tips of the plate-like bodies 1a and 1b, etc. ( Although not shown, more rollers may be required). Reference numeral 11 denotes a locking device for the upper belt which is provided in an upright manner on the transport trolley 3 and is composed of a fixed receiver 11a and a stopper 11b fixed to the upper belt 2a.
The stopper 11b is rotatably attached to both ends of a belt stopper rod 11c fixed to the belt over the width of the belt. 12 is a drive device for the belt stand 6. Further, both ends of the lower belt 2b wrapped around the plate-shaped body 1b are attached to locking devices 3a over the belt width, and the locking devices 3a are further fixed to the main body of the transportation trolley 3. That is, this lower belt 2b becomes a fixed belt.

Now, before starting the belt scooping operation, in preparation for this, in order to move the stopper 11b of the locking device 11 to the position of the receiver 11a, the belt stand 6 is moved forward or backward appropriately, and the stopper 11b and the receiver 11a must be connected and then moved to the initial position shown in FIG. 3a. When the belt stand 6 is advanced from this state, it becomes as shown in FIG. 3b.
At this time, the speed of the upper part of the upper belt 2a in contact with the object A and the lower part of the lower belt 2b is zero,
The conditions for skimming motion of the belt are met. After scooping up the object A, the locking device 11 is released and the belt stand 6 is moved backward, as shown in FIG. 3c. At this time, the upper belt 2a is drawn toward the truck 3 without moving relative to the plate-like body 1a. As described above, the forward and reverse rotation mechanism of the upper and lower belts 2a, 2b is substituted by combining the belt locking device 11 and the driving device 12 for moving the belt table 6 forward and backward.

This type is mechanically simple, but it is cumbersome as it must always be returned to the initial state when starting operation, there is no flexibility in operation, and the belt width is too long so that the locking device becomes an obstacle. cannot transfer long objects. There are drawbacks such as a large stress being applied to the belt tip, which makes it prone to fatigue. Note that a rack, pinion, chain, etc. are used to transmit the driving force of the belt stand.

Next, the one shown in Figure 4a is
It is a schematic diagram of the transfer device (stretcher) of No. 24536. In this case, the upper belt 2a is connected to the drive roller 1
3 forcibly rotated with respect to the plate-shaped body 1a,
The lower belt 2b is the so-called fixed belt mentioned above, and follows the belt stand 6. 14 is a drive device for the drive roller 13, and 12 is a drive device for the belt stand 6. This type has the advantage that only the upper belt 2a can be driven, and the position of the object A scooped onto the belt can be freely changed.
A mechanism or control is required to synchronize the driving of the two.

FIG. 5 is a schematic diagram of an object conveying device shown in Japanese Patent Publication No. 47-34477. This is to forcibly drive the fixed belt of the above-mentioned transfer device by a drive roller. That is, the end portion of the lower belt 2b is hooked onto and driven by a drive roller 16 rotated by a drive device 15. Reference numeral 13 denotes a drive roller which is hung on the upper belt 2a in the same manner as described above, and is connected to the drive device 14. 12 is a drive device for the belt stand 6.

Also, Fig. 4b shows a type that can be considered as an application of Fig. 4a, in which the lower belt 2b is connected to the transport trolley 3.
The driving roller 7 is fixed to the belt and rotated by a driving roller 7, so that the driving force or traction force of the belt stand 6 is obtained by the tension of the belt. As is common to the systems shown in FIGS. 4a and 4b, a large stress is applied to the tip of the lower belt 2b, and fatigue of the belt is unavoidable. In this respect, it can be said that the type shown in FIG. 5 causes less belt fatigue.

The belt feeding mechanism using drive rollers described above allows the belt to be stored compactly, but it is quite difficult to feed the belt accurately without slipping, twisting, or shifting.

Further, a transfer device having another belt feeding mechanism has been devised in consideration of this point.

For example, FIG. 6 is a schematic diagram of a transfer device disclosed in Japanese Patent Publication No. 56-34298. In this case, the lower belt 2b is a fixed belt, and is driven as the belt stand 6 is driven. The upper belt 2a is guided by a group of rollers 17, and as shown in the figure, a portion of the belt 2a is folded into four layers inside the truck 3 and is hung over a pair of floating guide rollers 18. 19 and 20 are brakes placed at the four-layer overlap position and the return position of the belt 2a;
Braking is applied appropriately depending on each stage of the transfer operation. 1
2 is a drive device for the belt stand 6, and 21 is a drive device for the pair of floating guide rollers 18. Since the pair of floating guide rollers 18 are driven in the opposite direction to the belt stand 6 at a speed 1/2 that of the belt stand 6, the belt 2a follows the movement of the belt stand 6 without slack. The illustrated belt shows a state of scooping operation, but at this time the brake 20 is energized and the brake 1
9 is deactivated. In this case, the belt 2a moves toward the upper plate-shaped body 1 at a speed twice as fast as the forward speed of the belt stand 6 and four times as fast as the backward speed of the pair of idle guide rollers 18.
The object is sent between the object a and the lower plate-like body 1b, but the upper part that contacts the object is fixed by the brake 20, so the speed is zero, satisfying the conditions for scooping the object. In this belt feeding device, since a part of the belt is always fixed by a brake during its operation, it is considered that the belt is less likely to be twisted or shifted to one side than a device using a drive roller, and the feeding operation is more accurate. FIG. 7 is a schematic diagram of the transfer device shown in Japanese Patent Publication No. 56-24535. In the one shown here, the upper and lower belts mentioned above are covered by one belt 2, and the belt 2 wound around the winding roller 22 (reel) is folded back at the tip so as to be wound around the plate-shaped body 1a. After that, it is folded back again by the right roller of the pair of floating guide rollers 23, further folded back through the roller 24 installed near the tip of the plate-shaped body 1a, and folded back two more times to include the winding roller 25 and the lower plate-shaped body 1b. and is stored on the winding roller 25. Also, 2
Reference numeral 6 denotes a belt different from the belt 2, and the belt 26 exits the winding roller 27, passes through the left roller of the pair of floating guide rollers 23, and is folded back, and the other end is fixed. This belt 26 is sent out or stored when the pair of floating guide rollers 23 needs to move. The figure shows the state of the scooping operation of the belt 2; at this time, the winding roller 22 is winding up, the winding roller 25 is performing a feeding operation, and the winding roller 27 is fixed. Furthermore, the illustrated arrow represents the relative velocity to a stationary body (object). Considering that the speed of this arrow is twice the forward speed of the belt stand 6, the relative movement speed of the belt 2 around the plates 1a and 1b is equal to the forward speed, and the belt 2 rotates counterclockwise with respect to the upper plate-like body 1a and clockwise with respect to the lower plate-like body 1b. It can be seen that this also satisfies the conditions for scooping up the object. Incidentally, the belt stand 6 is self-propelled by the feeding of the belt on the lower surface of the plate-shaped body 1b.

FIG. 8 is a schematic diagram of the transfer device shown in Japanese Patent Publication No. 56-16659. This uses the lower belt 2b as a fixed belt, which is driven as the belt stand 6 is driven. One end of the upper belt 2a is wound around a winding roller 22, and the other end is wound around a winding roller 25 and stored therein. The illustration shows a scooping operation, in which the belt stand 6 is advanced by the drive device 12, the winding roller 25 is belt fed by the drive device 28b, and the winding roller 2
2 is stopped. The difference between FIG. 8 and FIG. 7 is that the winding roller 22 is equipped with a drive device 28a. 3. Winding rollers 22 and 25 are arranged on the main body. Therefore, the winding roller 25 feeds the belt at twice the moving speed of the belt stand 6. At this time, the conditions for the scooping operation of the belt 2a are satisfied. In such a belt feeding mechanism using winding rollers, since the other end of the belt is fixed, twisting and shifting of the belt are small, and the operation is considered to be accurate.

Furthermore, although there are various variations of belt scoop drive systems, conventional systems are generally large, heavy, and difficult to move, making them effective only for certain tasks. In addition, although the object to be transferred was not limited in the above explanation, when the object to be transferred is a human body, in other words, in the medical field, this belt scooping device is used as a device that can safely transfer a patient on a bed without human intervention. Although devices are becoming more popular, there are problems with the installation space, weight, cost, etc., and their use is mostly limited to large hospitals, and people who do not like the complicated operation.
Some people shy away from using it.

<Problems to be Solved by the Invention> In view of the above-mentioned circumstances, the present invention provides that if this belt transfer device is made compact, high-performance, and foldable, it can be used as a function of a so-called nursing robot in the medical field. By focusing on this point, we have completed a belt transfer device.

<Means for Solving the Problems> The present invention interposes a protruding base between the plate-like body around which the belt is wound and the moving device serving as the truck portion, so that both the moving device and the belt stand can freely slide. This is a belt transfer device with a two-stage push-out mechanism, and when transferring an object, the belt stand approaches the object together with the push-out stand, and only the belt stand approaches between the object and the support surface. It has a two-step action to scoop up and move an object without changing its position.

<Example> The present invention will be described below based on the drawings of the example.

9a, b, and c show a belt transfer device equipped with a two-stage ejecting mechanism, which is the basic structure of the present invention, 6 is a belt stand, and an ejecting stand 29 is disposed at the lower part of the belt stand, and the ejecting The loading platform 30 of the trolley 3 is located at the bottom of the platform 29.
is located. The protruding base 29 is supported with respect to the loading platform 30, and the belt base 6 is supported with respect to the protruding base 29 so as to be slidable in the horizontal direction. 8 is a support for the object A.

Here, FIG. 9a shows that in order to transfer the object A with a belt, the transport trolley 3 is placed next to the support platform 8, and the loading platform 30 is placed so that the heights of the support platform 8 and the push-out platform 29 are the same. Figure 9b shows the state in which the height has been adjusted, and FIG. It is performing the first stage push-out motion. In the present invention, the belt platform 6 is equipped with a mechanism for generating the driving force necessary for this operation, so a force transmission mechanism from the belt platform 6 to the loading platform 30 is provided, although it is omitted in the drawing. . Further, in this case, the belt stand 6 is locked so as not to slide relative to the protruding stand 29. Next, FIG. 9c shows the second stage of pushing out operation, in which the belt stand 6 slides to the right with respect to the pushing out stand 29, and at the same time, the belt (not shown) is rotationally driven to remove the object. Scoop A onto the belt. Although a force transmission mechanism from the belt stand 6 to the push-out stand 29 is required, it is omitted in the drawing. Further, the protruding platform 29 receives a reaction force when the belt platform 6 moves, so it is locked against the loading platform 30 so that it does not slide. After scooping up the object A, the belt stand 6 is stored in the ejecting stand 29 while the rotation of the belt is stopped, and the belt stand 6 and the ejecting stand 29 are moved to the loading platform 3.
Pull it to 0 and complete the transfer.

Generally, compactness is required in the design of this type of belt transfer device, where the width dimension L is limited (see FIG. 9a), whereas the distance Lo from the lateral edge of the support base 8 of the object A is limited. If the belt is large, it is often insufficient to slide the belt stand 6 in one step. As a solution to this problem, we use the two-step extrusion method shown in Figure 9 a, b, and c. After approaching object A to some extent in the first step of extrusion,
Since the transfer operation is performed in the second stage of ejection, the transfer can be carried out reliably. However, according to this idea, a more multi-step ejecting operation is possible, but since the force transmission mechanism from the transfer device main body (loading platform) becomes complicated, a two-step ejecting operation is appropriate from a practical standpoint.
In addition, if Lo is small, only the belt stand 6 will protrude,
Transfer may also be performed.

Figure 10 shows the details of the belt platform for transferring objects.
a and the lower plate-like body 1b are arranged in parallel, and the plate-like body 1
Belts 2a and 2b are wound around a and 1b, respectively. Reference numeral 29 denotes a push-out stand, to which the end of the lower belt 2b is fixed.

Figures 11a and 11b show the power transmission mechanism, in which a sprocket 31 provided on the belt stand 6 is mechanically connected to an appropriate power source (for example, a motor).
Drive chain 32. Guide sprockets 33 and 34 are attached to the belt stand 6 together with the sprocket 31. This chain 32 is a protruding base 29
It is hung between the sprockets 35 and 36 attached to the carrier, and is made endless by sewing together the sprockets 34, 31, and 33, but is held by a connecting stopper 37 fixed to the carrier 30 near the tip of the carrier 30. ing.

Here, FIG. 11a shows the first stage of ejection, with the sprocket 31 rotating clockwise. At this time, the protruding base 29 and the loading platform 30 are slidable, the belt base 6 and the protruding base 29 are made non-slidable by the locking device 38, and the connecting stop 37 is moved to the left (as the chain 32 is driven). (as shown). Due to this relative movement, the belt stand 6 and the push-out stand 29 simultaneously move to the right with respect to the loading platform 30. When the first stage of ejecting is completed, the belt stand 6 and the ejecting stand 29 are unlocked, and the ejecting stand 29 is locked onto the loading platform 30 by the locking device 39. Therefore, only the belt stand 6 becomes slidable.

FIG. 11b shows a second stage of ejection, in which sprocket 31 rotates counterclockwise.
Here, the chain 32 is held by a connecting stop 37,
In addition, since the protruding platform 29 is also fixed to the loading platform 30,
The chain 32 is fixed, and the sprocket 31 advances while feeding the chain 32, that is, the belt stand 6 itself moves to the right. After the object is transferred, the belt stand 6 and the push-out stand 29 are returned to the loading platform 30 by performing the reverse operation to the above. Although this example uses a chain drive, the chain and sprocket may be replaced with a toothed belt or pulley. However, if a large driving force is required, a chain drive is better.

FIGS. 12a and 12b show another embodiment of the power transmission mechanism for the two-stage ejection transfer belt. The operating principle of this mechanism is almost the same as that of the power transmission described above, and a wire is used. In this case, flexibility is created in the shape and structure of the belt stand 6 and the push-out stand 29, and for example, the thickness of the push-out stand 29 can be made extremely small (about the diameter of a wire). A roller 40 disposed on the belt stand 6 is mechanically connected to a power source (for example, a motor) and drives a wire 41. This wire 41 is connected to the roller 4 attached to the protruding base 29.
2.43, and is wound around the roller 40 several times.

In this case, there are two possible types of hanging shapes for the wire 41. This is shown in Figures 13a and b. That is, FIG. 13a shows an endless wire hook, in which the wire 41 is simply wound around the roller 40, and the power is transmitted by the frictional force between the roller 40 and the wire 41 based on the tension of the wire 41. .

FIG. 13b shows that the wire 41 led from the roller 42 of the push-out table 29 is wound around the roller 40a several times, and then the end is fixed to the roller 40a.
The wire 41 led from 3 is wound around the roller 40b several times, and then the end portion is fixed to the roller 40b to form a so-called combined winding roller structure. At this time,
Power is transmitted by the circumferential tension of the wire against the roller. In Fig. 13a, a large amount of power cannot be transmitted due to slippage between the roller and the wire, but in Fig. 13b, there is no risk of this happening. However, in FIG. 13a, the number of turns of the wire on the roller does not change with rotation, but in FIG. 13b, as the roller rotates, the number of turns of the wire increases on one roller and decreases on the other. Therefore, the rotational speed and wire feeding speed are not always constant, but vary slightly depending on the number of turns of the roller.

Here, returning to FIG. 12, the connection stopper 3
7 is fixed to the loading platform 30 near the tip of the loading platform 30, and holds a part of the wire 41. 12th
FIG.
9 is prevented from sliding by the locking device 38, so as the wire 41 is driven, the connecting stop 37 is pulled to the left. Due to this relative movement, the belt stand 6 and the push-out stand 29 simultaneously move to the right with respect to the loading platform 30. When the first stage of ejecting is completed, the belt stand 6 and the ejecting stand 29 are unlocked, and the ejecting stand 29 is locked onto the loading platform 30 by the locking device 39. Therefore, only the belt stand 6 is slidable. FIG. 12b shows a second stage of ejection, in which the roller 40 rotates clockwise. Here, the wire 41 is held by the connection stopper 37, and the protruding platform 29 is also held by the loading platform 3.
Since it is fixed at 0, the wire 41 is in a fixed state. The roller 40 moves forward while feeding the wire 41, that is, the belt stand 6 itself moves to the right. After transferring the object, the above-mentioned reverse operation is performed to return the belt stand 6 and the push-out stand 29 onto the loading platform 30. Power transmission using the wire 41 is effective in designing the belt transfer device to be compact and lightweight, but a chain or a toothed belt is suitable when a precise feed rate is required.

FIG. 14 is a perspective view showing another embodiment, which is a transfer device which is a combination of a belt platform 6, a push-out platform 29, a loading platform 30 attached to the transfer device, and a transfer device 3 serving as a cart, as described above. is the support for object A.

The drawing shows the second stage of the pushing out state, in which the belt stand 6 moves the object A and the support stand 8 by the propulsive force obtained by handing the chain 60 against the pushing out stand 29 which is locked to the loading platform 30. invade in between. Belt 2a rotates to minimize this friction.

FIG. 15 shows an embodiment of the transmission mechanism section,
A protruding stand 29 is arranged at the bottom of the plate states 1a and 1b arranged at the lower part of the belt stand 6, and the upper belt 2a hung on the plate state 1a is guided by guide rollers 45 and 46, and is put on the main roller 47. However, the main roller 47 is in pressure contact with the drive roller 48, and the belt 2a is fed as the drive roller 48 rotates.
The lower belt 2b is a so-called fixed belt.
The reason why the upper belt 2a is fed by pressing two rollers is to ensure reliable belt feeding even if the belt tension is insufficient. A part of the drive roller 48 is missing in the middle, and the sprocket 4 is attached to that part.
9 is fixed with its rotating shaft coaxial with the drive roller 48, and is further mechanically connected to a chain 50, a sprocket 51, and a motor 52a.
The driving force of a is reliably transmitted to the driving roller 48. This chain 50 and sprockets 49, 51
The transmission mechanism may be replaced with a combination gear or a toothed belt and a pulley. Although not shown in FIG. 15, another motor 52b is provided for moving the belt stand 6 forward. The rotation of the motor 52b is transmitted by gears 53 (see FIG. 16) and 54 to a shaft 55 having a length approximately the width of the belt stand 6 and perpendicular to the paper surface, and rotational force can be transmitted in the orthogonal direction. Rotation is transmitted to a vertical shaft 58 by gears 56 (see FIG. 16), 57 such as spiral gears, bevel gears, worm gears, etc. This vertical axis 58
A sprocket 59 is attached to the tip of the sprocket, and driving force is transmitted to a chain 60 that meshes with the sprocket 59. This chain 60 is hung in the same manner as shown in FIGS.
2 (see FIG. 16), the chain 60 is endless. This is made clear from the plan view shown in FIG. 16.

In this embodiment, two chains 60 are hung at both ends (upper and lower positions in the drawing) of the belt 2a in the width direction, but only one chain 60 may be hung at the center.
However, for the stability of driving the belt stand 6, it is better to use two. Incidentally, the reason why the rotation axis of the sprocket of the chain 60 is perpendicular to the belt surface, unlike in FIG. 11, is to make the thickness of the protrusion base 29 as small as possible. Further, in this embodiment, two motors are used, one for driving the belt and one for driving the belt stand, but the same function can be obtained with one motor by switching the rotational force transmission system using, for example, a clutch. However, for a compact design, it is better to use two motors that do not require a complicated drive power transmission system.

<Effects of the Invention> As described above, the belt transfer device of the present invention is a two-stage pressing system in which a plate-shaped body with a movable belt wrapped around the surface between an object and a supporting surface is placed on a loading platform via a loading platform. By adopting the ejecting configuration, an object (for example, a patient on a bed) can be reliably transferred onto the belt stand, and the transfer device can be made compact. Moreover, since it is easy to operate, if this is used as a stretcher to move the patient from the bed, it will be effective enough even in small hospitals with small spaces. Of course, instead of using a stretcher, it may be used as a means for simply scooping the object horizontally.

[Brief explanation of drawings]

Fig. 1 a, b, c is an explanatory diagram of the principle of belt transfer operation, Fig. 2 a, b, c is an explanatory diagram of the operating principle of the belt transfer device, Fig. 3 a, b, c, Fig. 4 a,
b, FIG. 5, FIG. 6, FIG. 7, and FIG. 8 are schematic illustrations of a conventional belt transfer device, and FIGS. 9 a, b, and c are illustrations of the operating principle of the belt transfer device of the present invention. Figure 10 is a schematic diagram of the belt transfer device, Figures 11a and b are explanatory diagrams showing an embodiment of the power transmission mechanism of the belt stand and the push-out stand, and Figures 12 a and b are the belt stand and the push-out stand. 13A and 13B are explanatory views of wire hooking, FIG. 14 is a slope view of the belt transfer device, and FIG. 15 is an explanatory view showing another embodiment of the power transmission mechanism.
The figure is an enlarged sectional view of the belt stand, and FIG. 16 is a partially cutaway plan view of the same. 1a...Upper side plate-like body, 1b...Lower side plate-like body, 2...Belt, 2a...Upper side belt, 2b...Lower side belt, 3
...Dolly, 6... Belt stand, 8... Support stand, 29... Extrusion stand, 30... Loading platform, 31... Sprocket, 32...
Chain, 33, 34... Guide sprocket, 37
... connection stopper, 38 ... locking device, 40 ... roller,
41... Wire, 42, 43... Roller, 47... Main roller, 48... Drive roller, 50... Chain, 5
2a, 52b...Motor, 56, 57...Gear, 5
8...Vertical axis, 60...Chain, A...Object.

Claims (1)

[Claims] 1. Between a belt stand in which a belt is wrapped around a plate-shaped body inserted directly between a stationary object and a support surface, and a moving device serving as a trolley disposed below, the moving device and the belt The belt stand and the push-out stand are interposed so that they can slide freely relative to the stand, and a two-stage feeding mechanism is configured to feed out the belt stand and the push-out stand integrally or only the belt stand toward the supporting stand side. belt transfer device. 2. The belt transfer device according to claim 1, wherein the ejection table is moved linearly relative to the moving device via a power transmission device from a rotating machine. 3. The belt transfer device according to claim 1, in which the belt stand is moved linearly by the rotary machine through a power transmission device with respect to the moving device and the pushing out stand. 4. The belt transfer device according to claim 1, wherein the belt of the belt stand is rotated by a power transmission device from a rotating machine. 5. The belt transfer device according to claim 1, wherein the belt stand and the push-out stand are driven by the same rotating machine. 6. The belt transfer device according to claim 1, wherein the belt stand, the push-out stand, and the belt are driven by a driving force generating device integrated with the belt stand.