JP6779441B2 - Conveyor device and its manufacturing method, and wheelchair - Google Patents

Description

The present disclosure relates to a conveyor device, a method for manufacturing the conveyor device, and a wheelchair.

Patent Document 1 discloses that the drive roller 15 is pivotally supported by a mounting plate 17 attached to the conveyor frame 3, and the pressing rollers 37 and 39 are pivotally mounted on the mounting plate 17.

Patent Document 2 discloses that the drive roller 7 is pivotally supported by the support plates 10a and 10b, and the snap rollers 8a and 8b are pivotally mounted on the support plates 10a and 10b.

Patent Document 3 discloses a wheelchair in which a belt conveyor device is mounted on a vehicle body frame as a seat portion.

Japanese Unexamined Patent Publication No. 2004-352403 Japanese Patent No. 3887521 JP-A-2017-140366

It is desired to provide a conveyor device that facilitates assembly or maintenance of the conveyor device. Alternatively or additionally, it is desired to facilitate facilitation of wheelchair assembly or maintenance.

The conveyor device according to one aspect of the present disclosure includes a first unit having first and second rollers around which a conveyor belt is wound endlessly, and a second unit to which the first unit is detachably attached. And one of the second units includes a drive roller around which the conveyor belt is rotated around a part of the outer circumference, and the other of the first and second units advances the conveyor belt more than the portion of the conveyor belt that is rotated around the drive roller. Includes 3rd and 4th rollers that should come into contact with the conveyor belt at upstream and downstream positions with respect to direction, and resists the urging of at least one of the 3rd and 4th rollers when the 1st unit is attached to the 2nd unit. A drive roller is introduced between the third and fourth rollers through the increased spacing between the third and fourth rollers.

The method for manufacturing a conveyor device according to one aspect of the present disclosure is one of the first and second units when the first unit having the first and second rollers around which the conveyor belt is wound endlessly is attached to the second unit. The drive roller included in the above, on which the conveyor belt is rotated on a part of the outer circumference, is upstream of the portion of the conveyor belt included in the other of the first and second units, which is rotated on the drive roller, in the traveling direction of the conveyor belt. And the distance between the 3rd and 4th rollers that is inserted between the 3rd and 4th rollers that should come into contact with the conveyor belt at the downstream position and resists and follows the urging of at least one of the 3rd and 4th rollers W5. Increases and decreases.

The wheelchair according to one aspect of the present disclosure is a wheelchair including a vehicle body frame and a conveyor device mounted as a seat on the vehicle body frame, and the conveyor device is the first and first on which the conveyor belt is wound endlessly. It includes a first unit having a second roller and a second unit provided on the vehicle body frame side and to which the first unit can be detachably attached. When the first unit is attached to the second unit, it is included in the first unit. Tension is applied to the conveyor belt or the tension of the conveyor belt is increased via a pivot that resists and follows the urging of at least one additional roller and at least one roller contained in the second unit.

According to one aspect of the present disclosure, it is possible to provide a conveyor device that facilitates assembly or maintenance of the conveyor device. Alternatively or additionally, according to one aspect of the present disclosure, facilitation of wheelchair assembly or maintenance can be facilitated.

It is a schematic exploded perspective view of the conveyor device which concerns on this disclosure, and shows the state which the 1st unit and the 2nd unit are separated into the upper and lower sides. It is a schematic schematic diagram of the conveyor device which concerns on this disclosure, and shows the positional relationship between the 1st to 4th rollers and a drive roller in a state where a 1st unit is attached to a 2nd unit. FIG. 5 is a schematic view showing a state in which a drive roller is introduced between the third and fourth rollers in the conveyor device according to the present disclosure. Each of the third and fourth rollers is pivotally supported by a pivot member, and the pivot member is It is also shown that it is urged by an elastic member. It is a schematic diagram which shows the state before the drive roller is introduced between the 3rd and 4th rollers in the conveyor device which concerns on this disclosure, and the distance between 3rd and 4th rollers is smaller than the diameter of a drive roller. It is a schematic diagram which shows the process which the 1st unit is attached to the 2nd unit in the conveyor device which concerns on this disclosure. It is a schematic diagram which shows the state just before the 1st unit is attached to the 2nd unit in the conveyor device which concerns on this disclosure, and shows the positional relationship between the rotation axis of each roller and the pivot axis of a pivot member. It is a schematic diagram which shows the state which the drive roller is rotated after the 1st unit is attached to the 2nd unit in the conveyor device which concerns on this disclosure, and is the positional relationship between the rotation axis of each roller and the pivot axis of a pivot member. Is shown. It is a schematic diagram which shows that the sliding surface on which the side edge portion of a conveyor belt slides is provided in the pivot member in the conveyor device which concerns on this disclosure. It is a schematic perspective view of a wheelchair in which the conveyor device according to the present disclosure is mounted on a vehicle body frame as a seat portion. It is a schematic front view of a wheelchair in which the conveyor device according to the present disclosure is mounted on a vehicle body frame as a seat portion, and shows that the seat portion can move in the left-right direction based on the operation of a linear actuator. It is a schematic diagram which shows the connection mode of a linear actuator and a conveyor device. It is a schematic schematic diagram of another form of the conveyor device which concerns on this disclosure, and shows the positional relationship between the 1st to 4th rollers and a drive roller in a state where a 1st unit is attached to a 2nd unit. It is a schematic diagram which shows the modification which the rotation position of a 4th roller is fixed.

Hereinafter, non-limiting embodiments of the present invention will be described with reference to FIGS. 1 to 12. One or more embodiments of the disclosure and each feature included in the embodiments are not individually independent. One of ordinary skill in the art can combine each embodiment and / or each feature without over-explanation. Those skilled in the art can also understand the synergistic effect of this combination. In principle, duplicate explanations between the embodiments will be omitted. The reference drawings are primarily intended to describe the invention and may be simplified for convenience of drawing.

FIG. 1 is a schematic exploded perspective view of the conveyor device 50, showing a state in which the first unit 51 and the second unit 52 are separated into upper and lower parts. FIG. 2 is a schematic schematic view of the conveyor device 50, in which the positions of the first to fourth rollers 110, 120, 130, 140 and the drive roller 150 when the first unit 51 is attached to the second unit 52. Show the relationship. FIG. 3 is a schematic view showing a state in which the drive roller 150 is introduced between the third and fourth rollers 130 and 140 in the conveyor device 50, and each of the third and fourth rollers 130 and 140 is a pivot member 160. It is also shown that the pivot member 160 is urged by the elastic member 170. FIG. 4 is a schematic view showing a state before the drive roller 150 is introduced between the third and fourth rollers 130 and 140 in the conveyor device 50, and the interval W5 between the third and fourth rollers 130 and 140 is It is smaller than the diameter of the drive roller 150.

As shown in FIGS. 1 to 4, the first unit 51 has first and second rollers 110 and 120 on which the conveyor belt 300 is wound endlessly. The conveyor belt 300 is a sheet material having a front surface 301 and a back surface 302. The second unit 52 is a unit to which the first unit 51 can be detachably attached. In the illustration, the first unit 51 includes the drive rollers 150 in addition to the first and second rollers 110 and 120, and the second unit 52 includes the third and fourth rollers 130 and 140. As shown in FIG. 11, it is assumed that the first unit 51 includes the third and fourth rollers 130 and 140 in addition to the first and second rollers 110 and 120, and the second unit 52 includes the drive roller 150. In addition, the same benefits as described below can be achieved.

In some cases, the first unit 51 has a pair of side plates 61, 62, and the first roller 110 and the second roller 120, respectively, may be pivotally supported by the pair of side plates 61, 62. When the first unit 51 includes the drive roller 150, the drive roller 150 is pivotally supported by the pair of side plates 61 and 62. In some cases, the second unit 52 has a base material 71, and the third and fourth rollers 130, 140 are mounted on a base material 71 such as a flat plate material.

The first and second rollers 110, 120 can be arranged in parallel. Various types of rotating bodies can be adopted as the first and second rollers 110 and 120. For example, the rollers 110 and 120 may include a core rod that is a rotating shaft and a cylindrical member that is assembled to the core rod via a bearing. A conveyor belt is hung around a part of the outer peripheral surface of the cylindrical member. In order to prevent the conveyor belt 300 from meandering, a non-slip member may be attached to a part of the outer peripheral surface of the cylindrical member. Each roller may have a sealing structure for dust and water resistance. The rollers 110, 120 may rotate in response to a rotational force provided by the drive roller 150 or provided by another drive source.

In the drive roller 150, the conveyor belt 300 is rotated around a part of the outer circumference. The drive roller 150 rotates in response to a rotational force supplied from a drive source (not shown), for example, an electric motor, causing the conveyor belts 300 to travel and circulate around the first and second rollers 110, 120. Let me. In addition to connecting the drive roller 150 coaxially to the output shaft of the electric motor, the electric motor and the drive roller 150 are connected so as to be able to transmit power via a timing belt. The traveling direction of the conveyor belt 300 depends on the rotation direction of the electric motor. Like the first and second rollers 110 and 120, the drive roller 150 can be various types of rotating bodies, for example, a core rod that is a rotating shaft and a cylinder that is assembled to the core rod via a bearing. Including members.

The third and fourth rollers 130 and 140 should come into contact with or come into contact with the conveyor belt 300 at positions upstream and downstream of the portion 390 of the conveyor belt 300 that is routed around the drive roller 150 with respect to the traveling direction of the conveyor belt 300. Laura. The portion 390 of the conveyor belt 300 that is rotated around the drive roller 150 may be a portion that comes into direct contact with the drive roller 150. When the conveyor belt 300 advances and circulates in the direction of arrow D1 in FIG. 2, the third roller 130 is arranged on the upstream side of the drive roller 150, the fourth roller 140 is arranged on the downstream side of the drive roller 150, and each roller 130. , 140 are located on the conveyor belt 300 at positions upstream and downstream of the portion 390 of the conveyor belt 300 that is rotated around the drive roller 150 with respect to the traveling direction of the conveyor belt 300, in short, at a position that sandwiches the drive roller 150 from both sides. Contact. When the conveyor belt 300 advances and circulates in the direction of arrow D2 in FIG. 2, the third roller 130 is arranged on the downstream side of the drive roller 150, the fourth roller 140 is arranged on the upstream side of the drive roller 150, and each roller 130. , 140 are located on the conveyor belt 300 at positions upstream and downstream of the portion 390 of the conveyor belt 300 that is rotated around the drive roller 150 with respect to the traveling direction of the conveyor belt 300, in short, at a position that sandwiches the drive roller 150 from both sides. Contact. When the third and fourth rollers 130 and 140 are in positions to sandwich the drive roller 150, the third or fourth roller 130 and 140 and the drive roller 150 are directly adjacent to each other via the conveyor belt 300. Not required.

The third roller 130 comes into contact with a portion of the conveyor belt 300 extending between the first roller 110 and the drive roller 150. The fourth roller 140 comes into contact with a portion of the conveyor belt 300 that extends between the drive roller 150 and the second roller 120. The third and fourth rollers 130, 140 may be arranged in parallel. The third and fourth rollers 130 and 140 may be rollers having the same diameter. The diameters of the third and fourth rollers 130, 140 can be less than or equal to the diameters of the first and second rollers 110, 120. Like the first and second rollers 110 and 120, the third and fourth rollers 130 and 140 can be various types of rotating bodies, for example, a core rod which is a rotating shaft and bearings for the core rod. It may include a cylindrical member assembled via.

The drive roller 150 is inserted and arranged between the third and fourth rollers 130 and 140. In some cases, at the position where the drive roller 150 is rotationally driven, the third roller 130 and the drive roller 150 are directly adjacent to each other via the conveyor belt 300, and the fourth roller 140 and the drive roller 150 drive the conveyor belt 300. Immediately adjacent via. That is, in the drive roller 150, a part of the conveyor belt 300 is sandwiched between the drive roller 150 and the third roller 130, and another part of the conveyor belt 300 is sandwiched between the drive roller 150 and the fourth roller 140. It is driven to rotate with.

In some cases, the diameter of the drive roller 150 is less than or equal to the diameter of the first and second rollers 110, 120. By increasing the diameter of the drive roller 150, the contact area between the drive roller 150 and the conveyor belt 300 is increased, and the force is more sufficiently transmitted from the drive roller 150 to the conveyor belt 300. However, in this case, it becomes difficult to reduce the size or thickness of the conveyor device 50. According to some features of the present disclosure, both the miniaturization or thinning of the conveyor device 50 and the transmission of sufficient force from the drive roller 150 to the conveyor belt 300 are compatible.

In the present embodiment, when the first unit 51 is attached to the second unit 52, the distance W5 between the third and fourth rollers 130, 140 that opposes the urging of at least one of the third and fourth rollers 130, 140 The drive roller 150 is introduced between the third and fourth rollers 130, 140 through the increase. As a result, facilitation of assembly or maintenance of the first unit 51 and the second unit 52 is promoted.

In some cases, when the first unit 51 is attached to the second unit 52, the spacing W5 between the third and fourth rollers 130, 140 that resists the urging of at least one of the third and fourth rollers 130, 140. Following the increase, there is a decrease in the spacing W5 between the third and fourth rollers 130, 140 that follows the urging of at least one of the third and fourth rollers 130, 140 (according to the urging). This promotes closer contact between the drive roller 150 and the conveyor belt 300.

After mounting the first unit 51 on the second unit 52, the positions of the rotation shafts of the first roller 110 and / or the second roller 120 with respect to the side plates 61 and 62 are adjusted, whereby the conveyor belt of the conveyor device 50 is adjusted. A tension of 300 can be optimized, eg, increased to a target value.

The urging of at least one of the third and fourth rollers 130, 140 is caused by the urging of at least one pivot member 160 that pivotally supports the third or fourth rollers 130, 140. As a result, the force with which the third or fourth rollers 130, 140 push the conveyor belt 300 is increased. For example, this compensates for the decrease in force transmission from the drive roller 150 to the conveyor belt 300 due to the adoption of the small diameter drive roller 150. The pivot member 160 may be a member to which the rotation shafts of the rollers 130 and 140 are axially attached. The pivot member 160 may be provided with a shaft hole through which the rotation shafts of the rollers 130 and 140 are rotatably inserted or fixed so as not to rotate. The pivot member 160 may be provided at both ends of the rollers 130, 140, or may be provided only at one end, or may be provided at an intermediate portion between both ends. The arrangement position of the pivot member 160 may be an arbitrary position in the axial direction of the rollers 130 and 140.

The pivot member 160 is provided so as to be pivotable. Therefore, the rollers 130 and 140 pivotally supported by the pivot member 160 can swing around the pivot shafts AX6 and AX7 of the pivot member 160. When the third roller 130 is pushed by the drive roller 150, the third roller 130 pivots in the first direction (counterclockwise when facing the front of FIG. 4) around the pivot axis AX6 and escapes from the drive roller 150. be able to. In response to the decrease in the pressing force from the drive roller 150 to the third roller 130, the third roller 130 is initially pivoted around the pivot axis AX6 in the second direction (clockwise when viewing FIG. 4 in front). It is possible to return to the position or the position on the initial position side. When the fourth roller 140 is pushed by the drive roller 150, the fourth roller 140 pivots in the second direction (clockwise when looking at FIG. 4 in front) around the pivot axis AX7 and escapes from the drive roller 150. Can be done. In response to the decrease in the pressing force from the drive roller 150 to the fourth roller 140, the fourth roller 140 is pivotally rotated in the first direction (counterclockwise when the front view of FIG. 4 is viewed) around the pivot axis AX7. It is possible to return to the initial position or the position on the initial position side.

The pivot member 160 extends along the first section 310 of the conveyor belt 300 extending from the third roller 130 toward the first roller 110 with the first unit 51 attached to the second unit 52. Alternatively, it extends along the second section 320 of the conveyor belt 300 extending from the fourth roller 140 toward the second roller 120. In such a case, the thinning of the conveyor device 50 is preferably promoted.

The first section 310 is separated from the flat section 330 of the conveyor belt 300 that extends flat between the first roller 110 and the second roller 120 as it extends from the third roller 130 toward the first roller 110. The second section 320 is separated from the flat section 330 of the conveyor belt 300 that extends flat between the first roller 110 and the second roller 120 as it extends from the fourth roller 140 toward the second roller 120.

The pivot member 160 has a thickness that decreases as it extends from the third roller 130 to the first roller 110 or from the fourth roller 140 to the second roller 120. Contact between the pivot member 160 and the conveyor belt 300 is avoided, or the elastic member 170 promotes urging the pivot member 160 with more sufficient force. The pivot member 160 is pressed by the elastic member 170 at the end on the side of the first or second roller 120. The third or fourth rollers 130, 140 can push the conveyor belt 300 with a force larger than the force with which the elastic member 170 pushes the pivot member 160, based on the principle of leverage. As the elastic member 170, a compression spring can be adopted.

The pivot axes AX6 and AX7 of the pivot member 160 are parallel to the rotation axes AX3 and AX4 of the third or fourth rollers 130 and 140, and the rotation axes AX3 and AX3 of the third or fourth rollers 130 and 140. It is positioned offset radially outward from AX4 (with respect to rotation axes AX3 and AX4). The position where the elastic member 170 presses the pivot member 160 is from the rotation shafts AX3 and AX4 of the third or fourth rollers 130 and 140 rather than the pivot shafts AX6 and AX7 of the pivot member 160 (relative to the rotation shafts AX3 and AX4). ) Positioned radially outward.

In some cases, the pivot member 160 is pivotally mounted on the substrate 71. This can make the assembly of the conveyor device 50 easier. The pivot member 160 has a first end portion 161 to which the third roller 130 or the fourth roller 140 is axially attached, and a second end portion 162 opposite to the first end portion 161. The second end 162 of the pivot member 160 is pressed by the elastic member 170, and the third or fourth rollers 130, 140 axially attached to the first end 161 of the pivot member 160 are attached to the bottom surface of the base material 71 or the recess 72. Be urged to the side. It is achieved that the conveyor belt 300 is compressed between the third roller 130 and the drive roller 150, and the conveyor belt 300 is compressed between the fourth roller 140 and the drive roller 150. The pressing direction of the pivot member 160 by the elastic member 170 and the insertion direction of the drive roller 150 between the third and fourth rollers 130 and 140 are opposite to each other.

The pivot member 160 is pivotally supported by a pivot member 180 provided on the base material 71 at a position between the first end portion 161 and the second end portion 162. To reduce the thickness of the conveyor device 50, the pivot member 180 may be placed on the bottom surface of the recess 72 of the substrate 71, and thus the pivot member 160 is provided on the bottom surface of the recess 72 of the substrate 71. In order to reduce the thickness of the conveyor device 50, an elastic member 170 for urging the pivot member 160 is provided in a through hole or a recess in the base material 71. When a compression spring is used as the elastic member 170, the compression spring has a first spring end in contact with the second end 162 of the pivot member 160 and a second spring end on the opposite side. In some cases, the position of the second spring end of the compression spring is adjustable, which adjusts the pressing force of the pivot member 160 by the compression spring. The position of the second spring end of the compression spring can be adjusted by the position of the screw attached to the substrate 71.

In some cases, a pair of pivot members 160 are provided at both axial ends of the third roller 130, and a pair of pivot members 160 are provided at both axial ends of the fourth roller 140. The rollers 130 and 140 are axially supported between a pair of pivot members 160 at both ends in the axial direction. The rotation axis of the drive roller 150 and the rotation axes of the rollers 130 and 140 are maintained in parallel.

FIG. 5 is a schematic view showing a process in which the first unit 51 is attached to the second unit 52 in the conveyor device 50. FIG. 5 shows that the first unit 51 is moved toward the second unit 52, but the second unit 52 is moved toward the first unit 51, and as a result, the first unit 51 is attached to the second unit 52. You can understand that it is done as well. In the first unit 51, the conveyor belt 300 is loosely routed around the first roller 110 and the second roller 120 (thus, the conveyor belt 300 is easy to install and replace). In the second unit 52, the third and fourth rollers 130 and 140 are in the initial positions, respectively. The initial positions of the third and fourth rollers 130 and 140 are set based on, for example, the maximum length of the elastic member 170.

At the time of FIG. 5A, the first unit 51 is moved to the second unit 52 side. At the time of FIG. 5B, the drive roller 150 is adjacent to the third roller 130 with the conveyor belt 300 interposed therebetween, and similarly adjacent to the fourth roller 140 with the conveyor belt 300 interposed therebetween. The third and fourth rollers 130 and 140 are still in their initial positions. The pivot shaft AX6 of the pivot member 160 is located closer to the base material 71 than the straight line L1 connecting the rotation shaft AX5 of the drive roller 150 and the rotation shaft AX3 of the third roller 130. The same applies to the pivot axis AX7 of the other pivot member 160.

At the time of FIG. 5C, the drive roller 150 presses the third roller 130 across the conveyor belt 300, and similarly presses the fourth roller 140 across the conveyor belt 300. The pressing force exerted by the drive roller 150 on the third roller 130 is larger than the urging force of the pivot member 160 based on the pressing of the elastic member 170, so that the third roller 130 opposes the urging direction of the elastic member 170. It pivots around the pivot axis AX6 in the direction. Similarly, the fourth roller 140 is pivoted around the pivot axis AX7 in a direction opposite to the urging direction of the elastic member 170. During the transition from FIG. 5 (b) to FIG. 5 (c), the pivot member 160 to which the third roller 130 is axially attached and the pivot member 160 to which the fourth roller 140 is axially attached are pivoted in opposite directions. To do. With the pivot of each of the rollers 130 and 140, the distance W5 between the third roller 130 and the fourth roller 140 increases. The height of the drive roller 150 on the base material 71 in FIG. 5 (c) is lower than the height of the drive roller 150 on the base material 71 in FIG. 5 (b). The rotation axis AX3 of the third roller 130 in FIG. 5 (c) is located at a position farther from the rotation axis AX5 of the drive roller 150 than the rotation axis AX3 of the third roller 130 in FIG. 5 (b) (this point is: It is better understood from the comparison with the broken line L2).

At the time of FIG. 5D, the rotation axis AX5 of the drive roller 150 is in the same plane as the rotation axis AX3 of the third roller 130 and the rotation axis AX4 of the fourth roller 140. The distance W5 between the third roller 130 and the fourth roller 140 becomes the maximum value. During the transition from FIG. 5 (c) to FIG. 5 (d), the pivot member 160 to which the third roller 130 is axially attached and the pivot member 160 to which the fourth roller 140 is axially attached are further pivoted in opposite directions to each other. It moves, and the distance W5 between them increases. The height of the drive roller 150 on the base material 71 in FIG. 5 (d) is lower than the height of the drive roller 150 on the base material 71 in FIG. 5 (c). In FIG. 5D, the amount of compression of the compression spring used as the elastic member 170 is the maximum.

At the time of FIG. 5 (e), the attachment of the first unit 51 to the second unit 52 is completed, and the drive roller 150 is in a position where the drive roller 150 is rotationally driven. At the time of FIG. 5 (e), the third roller 130 presses the drive roller 150 via the conveyor belt 300, and the fourth roller 140 presses the drive roller 150 via the conveyor belt 300. As a result, the conveyor belt 300 is promoted to be in close contact with the outer peripheral surface of the drive roller 150, and the driving force of the drive roller 150 is satisfactorily transmitted to the conveyor belt 300. During the transition from FIG. 5 (d) to FIG. 5 (e), the degree to which the third and fourth rollers 130 and 140 are pressed by the drive roller 150 becomes smaller, and the third and fourth rollers 130 and 140 are respectively. , Start to pivot towards the initial position. As the drive roller 150 moves downward, the pivot member 160 pivots in the direction following the urging by the elastic member 170, and the third and fourth rollers 130, 140 pivot to the initial position side, resulting in , The interval W5 between the third and fourth rollers 130 and 140 is reduced. Each of the third and fourth rollers 130 and 140 presses the conveyor belt 300 toward the drive roller 150, and the conveyor belt 300 and the drive roller 150 are promoted to come into closer contact with each other. When the attachment of the first unit 51 to the second unit 52 is completed, the third and fourth rollers 130 and 140 may be pushed by the drive roller 150 to take a position deviated from the initial position.

FIG. 6A is a schematic view showing a state immediately before the first unit 51 is attached to the second unit 52 in the conveyor device 50, and shows the positional relationship between the rotation axis of each roller and the pivot axis of the pivot member. When the conveyor belt 300 is simply sandwiched between the drive roller 150 and the third roller 130, tension is not applied to the conveyor belt 300. In response to the movement of the drive roller 150 toward the base material 71, the third roller 130 is moved by the drive roller 150 along the vector P4 in the direction connecting the rotation axis AX5 of the drive roller 150 and the rotation axis AX3 of the third roller 130. Be pushed. At this time, since the position of the pivot axis AX6 of the pivot member 160 is closer to the base material 71 than the vector P4, the pivot member 160 pivots counterclockwise around the pivot axis AX6, and the first The 3-roller 130 also pivots counterclockwise. Similarly, the other pivot member 160 that pivotally supports the fourth roller 140 results in the pivot of the fourth roller 140 clockwise around the pivot shaft AX7. From these results, the interval W5 between the third and fourth rollers 130 and 140 is increased, and the drive roller 150 can pass between the third and fourth rollers 130 and 140.

FIG. 6B is a schematic view showing a state in which the drive roller 150 is rotated after the first unit 51 is attached to the second unit 52 in the conveyor device 50, and the rotation shaft of each roller and the pivot of the pivot member. The positional relationship of the axes is shown. As shown in FIG. 6B, when the conveyor belt 300 advances in response to the rotation of the drive roller 150, tension is applied to the conveyor belt 300. Assuming that the tension vectors applied to the conveyor belt 300 starting from the rotation axis AX3 of the third roller 130 are P1 and P2, the pivot axis AX6 of the pivot member 160 is the base material 71 rather than the composite vector P3 of the tension vectors P1 and P2. Located on the side, the distance L6 along the perpendicular of the pivot axis AX6 with respect to the composite vector P3 is short. Therefore, the moment M1 that moves the pivot member 160 counterclockwise around the pivot shaft AX6 to move the third roller 130 away from the drive roller 150 becomes smaller. The elastic member 170 pushes the pivot member 160 counterclockwise, and a moment M2 is generated in which the third roller 130 presses the drive roller 150. The moment M2 is larger than the moment M1, so that the third roller 130 presses the drive roller 150 with sufficient force through the conveyor belt 300, facilitating good force transmission between the drive roller 150 and the conveyor belt 300. Ru. The same description applies to the fourth roller 140.

FIG. 7 is a schematic view showing that the pivot member 160 is provided with a sliding surface 168 on which the side edge portion 305 of the conveyor belt 300 slides in the conveyor device 50. In some cases, the pivot member 160 has a sliding surface 168 on which the side edge 305 of the conveyor belt 300 slides. The pivot member 160 can be covered by the conveyor belt 300. In some cases, an arcuate surface 169 is formed on the edge of the sliding surface 168 of the pivot member 160 to enhance the running stability of the conveyor belt 300. These features can contribute to the prevention of meandering of the conveyor belt 300.

The coupling of the first unit 51 and the second unit 52 can be achieved only by introducing the drive roller 150 between the third roller 130 and the fourth roller 140. In some cases, when the first unit 51 is attached to the second unit 52, the engaging portions 69 provided on one of the first and second units 51, 52 are attached to the first and second units 51, 52. It engages with the engaged portion 79 provided on the other side. The engaging portion 69 may be a claw member having a protruding piece protruding from the side plates 61 and 62. The engaged portion 79 may be an opening provided in the base material 71. The claw member is inserted into the opening, and the protruding piece of the claw member is locked to the lower surface or the back surface of the base material 71. It is also envisioned that a mechanism for axially supporting the first and second rollers 110 and 120 is mounted on the base material 71 or other members.

FIG. 8 is a schematic perspective view of the wheelchair 20 in which the conveyor device 50 is mounted on the vehicle body frame 29 as the seat portion of the wheelchair 20. FIG. 9 is a schematic front schematic view of the wheelchair 20 in which the conveyor device 50 is mounted on the vehicle body frame 29 as the seat portion of the wheelchair 20, and the seat portion is moved in the left-right direction based on the operation of the linear actuator (cylinder 21). Indicates that it can be moved. FIG. 10 is a schematic view showing a connection mode between the linear actuator (cylinder 21) and the conveyor device 50.

When the conveyor device 50 of the present disclosure is used as the seat portion of the wheelchair 20, the assembly efficiency of the wheelchair 20 can be improved. For example, after attaching the second unit 52 to the wheelchair 20 side, it is possible to attach the first unit 51 to the second unit 52. The final tension of the conveyor belt 300 can be adjusted by aligning the axes of the first and second rollers 110 and 120 with respect to the side plates 61 and 62. In addition, the thinned conveyor device 50 well meets the requirements of space constraints peculiar to wheelchairs. The first unit 51 can be removed from the second unit 52 and fits well with the need to replace the conveyor belt 300 during the use of the wheelchair.

The wheelchair 20 shown in FIGS. 8 and 9 has a vehicle body frame 29, a pair of wheels 27 attached to the vehicle body frame 29, and a backrest 26 attached to the vehicle body frame 29. The wheelchair 20 has optional armrests 25, training wheels 24 and the like. The wheelchair 20 has a seat portion mounted on the vehicle body frame 29 via an elevator 28. The seat portion has a base plate 22 connected to the upper end of the cylinder of the elevator 28, a cylinder (linear actuator) 21 arranged on the lower surface of the base plate 22, and a conveyor device 50 mounted on the upper surface of the base plate 22 via a linear guide. .. The base material 71 of the conveyor device 50 is mounted on the base plate 22 via a linear guide. The tip of the rod 21n extending from the main body 21m of the cylinder 21 is bonded to the base material 71 of the conveyor device 50. Therefore, the position of the conveyor device 50 with respect to the base plate 22 can be changed by moving the rod 21n with respect to the main body 21m of the cylinder 21 (see the broken line in FIG. 9).

When the first unit 51 is attached to the second unit 52, at least one of the drive roller 150 included in the first unit 51 and the third and / or fourth rollers 130 and 140 included in the second unit 52 is urged. It is understood as a universal individual feature that the tension of the conveyor belt 300 is increased through the resistance and following pivots. The present disclosure also discloses the invention according to the following appendix. Each feature described with respect to the conveyor device 50 is understood as an additional feature for the wheelchair described in Appendix 1, the entire listing of which is omitted.
-Appendix 1-
Body frame 29 and
A wheelchair including a conveyor device 50 mounted as a seat on a vehicle body frame 29.
The conveyor device 50 is provided on the vehicle body frame 29 side with the first unit 51 having the first and second rollers 110 and 120 on which the conveyor belt 300 is rotated endlessly, and the first unit 51 is detachably attached. With a second unit 52
When the first unit 51 is attached to the second unit 52, it urges at least one of the at least one additional roller 150 included in the first unit 51 and the at least one rollers 130, 140 contained in the second unit 52. Tension is applied or increased to the conveyor belt 300 via counteracting and following pivots.
-Appendix 2-
The first unit 51 includes, as at least one additional roller 150, a drive roller 150 around which the conveyor belt 300 is routed around a portion of the outer circumference.
The second unit 52, as at least one roller 130, 140, contacts the conveyor belt 300 at positions upstream and downstream of the portion 390 of the conveyor belt 300 that is rotated around the drive roller 150 in the traveling direction of the conveyor belt 300. Includes third and fourth rollers 130, 140 to
When the first unit 51 is attached to the second unit 52, the spacing W5 between the third and fourth rollers 130, 140 that resists and follows the urging of at least one of the third and fourth rollers 130, 140 increases and decreases. The wheelchair according to Appendix 1, wherein the drive roller 150 is introduced between the third and fourth rollers 130 and 140.

The thinned conveyor device 50 has various uses, and should not be limited to the use of the wheelchair shown in the illustrated example. The conveyor device 50 is also useful for other applications such as medical beds. In addition to cylinders, boring screws and the like can be used as linear actuators.

FIG. 11 shows a modified example in which the third and fourth rollers 130 and 140 are included in the first unit 51 and the drive roller 150 is included in the second unit 52. Also in this case, the first and second units 51 and 52 can be coupled via the insertion of the drive roller 150 between the third and fourth rollers 130 and 140.

FIG. 12 is a schematic view showing a modified example in which the fourth roller 140 rotates at a fixed position. As shown in FIG. 12, a form in which the fourth roller 140 rotates at a fixed position is also assumed. It is also assumed that the third and fourth rollers 130 and 140 are laterally urged parallel to the upper surface of the base material 71. The urging directions of the rollers 130 and 140 are also various, and should not be limited to the illustrated examples. As the pivot member 160, a pivot member that extends long along the insertion direction of the drive roller 150 can also be adopted. The roller is not limited to a cylindrical one extending in the axial direction, and may have one or more discs arranged in the axial direction. In some cases, the rollers include multiple discs that are coaxially arranged and that can rotate independently.

Based on the above teachings, those skilled in the art can make various changes to each embodiment. The reference numerals included in the claims are for reference only and should not be referred to for the purpose of limiting the claims.

50 Conveyor device 51 1st unit 52 2nd unit 110 1st roller 120 2nd roller 130 3rd roller 140 4th roller 150 Drive roller 300 Conveyor belt 390 Conveyor belt part W5 Spacing between 3rd and 4th rollers

Claims (18)

A first unit (51) having first and second rollers (110, 120) around which the conveyor belt (300) is wound endlessly, and a second unit (51) to which the first unit (51) is detachably attached. 52)
One of said first and second units (51, 52) includes a drive roller that said conveyor belt (300) is multiplied by turning a portion of the outer periphery (150),
The other of the first and second units (51, 52) is the conveyor that is rotated around the drive roller (150) with the first unit (51) attached to the second unit (52). Contact the conveyor belt (300) at positions upstream and downstream of the belt (300) in the traveling direction of the conveyor belt (300) , and sandwich the drive roller (150) from both sides. Including the third and fourth rollers (130, 140) provided in
At least one of the third and fourth rollers (130,140) is a pivot member (160) urged in a direction that causes a decrease in the spacing (W5) between the third and fourth rollers (130,140). Rotatably supported by
The interval (W5) between the third and fourth rollers (130, 140) can be increased or decreased according to the pressing force applied by the drive roller (150) to at least one of the third and fourth rollers (130, 140). Yes,
In the drive roller (150), a part of the conveyor belt (300) is pressed between the drive roller (150) and the third roller (130), and the drive roller (150) and the fourth roller (140) are pressed. ) , A conveyor device in which another portion of the conveyor belt (300) is rotationally driven at a compressed drive position . The pivot member (160) extends from the third roller (130) toward the first roller (110) with the first unit (51) attached to the second unit (52). The second of the conveyor belt (300) that extends along the first section (310) of the conveyor belt (300) or extends from the fourth roller (140) toward the second roller (120). extending along a section (320), conveyor system according to claim 1. The pivot member (160) extends from the third roller (130) toward the first roller (110) or from the fourth roller (140) toward the second roller (120). The conveyor device according to claim 2 , which has a thickness that decreases accordingly. The conveyor device according to claim 2 or 3 , wherein the pivot member (160) is pressed by an elastic member (170) at an end on the first or second roller (110, 120) side. The pivot member (160) is a side edge portion (305) of the conveyor belt (300) that is wound around a part of the outer circumference of the third or fourth roller (130, 140) that is pivotally supported by the pivot member (160). The conveyor device according to any one of claims 1 to 4 , which has a sliding surface (168) on which the belt slides. Wherein the said edge portion of the sliding surface (168) of the pivotal member (160) Ru is arcuate surface (169) is formed, the conveyor apparatus according to claim 5. The base material (71) on which the pivot member (160) is mounted pivotally is provided with a recess (72) on which the pivot member (160) is provided on the bottom surface, and / or said. pivotal member (160) is an elastic member (170) for biasing the at least partially housed through holes or recesses provided et the conveyor device according to any one of claims 1 to 6. Before SL engagement portion provided on one of the first and second units (51, 52) (69) is, the first and the engaged portion provided in the other of the second unit (51, 52) ( 79) The conveyor device according to any one of claims 1 to 7 , which is engageable with 79). The first unit (51) is not attached to the second unit (52), the distance (W5) between the third and fourth rollers (130, 140) is the minimum, and the drive roller (150). ) Is arranged adjacent to each of the third and fourth rollers (130, 140) with the conveyor belt (300) in between, and the rotation shaft (AX5) of the drive roller (150) and the said. When setting a straight line (L1) extending so as to connect the rotation axes (AX3, AX4) of the third or fourth roller (130, 140), the pivot axis of the pivot member (160) is the pivot member. The conveyor device according to any one of claims 1 to 8, which is located between the base material (71) on which (160) is mounted and the straight line (L1) . The first unit (51) is attached to the second unit (52), and the rotation shaft (AX5) of the drive roller (150) is the rotation shaft (AX3) of the third or fourth roller (130, 140). , AX4) is located closer to the base material (71) on which the pivot member (160) is mounted than the plane on which the third or fourth roller (130, 140) is mounted. When setting the composite vector (P3) of the tension applied to the conveyor belt (300) starting from AX4), the pivot axis of the pivot member (160) is set by the pivot member (160). The conveyor device according to any one of claims 1 to 9, which is located closer to the composite vector (P3) than the mounted base material (71) . A wheelchair provided with the conveyor device according to any one of claims 1 to 10 as a seat. The first unit (51) having the first and second rollers (110, 120) around which the conveyor belt (300) is wound endlessly and the second unit (52) to which the first unit (51) is detachably attached . ) Is a method of manufacturing a conveyor device.
One of the first and second units (51, 52) includes a drive roller (150) around which the conveyor belt (300) is turned around a part of the outer circumference.
The other of the first and second units (51, 52) is the conveyor that is rotated around the drive roller (150) with the first unit (51) attached to the second unit (52). Contact the conveyor belt (300) at positions upstream and downstream of the belt (300) in the traveling direction of the conveyor belt (300), and sandwich the drive roller (150) from both sides. Including the third and fourth rollers (130, 140) provided in
At least one of the third and fourth rollers (130,140) is a pivot member (160) urged in a direction that causes a decrease in the spacing (W5) between the third and fourth rollers (130,140). Rotatably supported by
The manufacturing method of the conveyor device is
In the step, the step of inserting the drive roller (150) between the third and fourth rollers (130, 140) is included.
The interval (W5) between the third and fourth rollers (130, 140) increases or decreases according to the pressing force applied by the drive roller (150) to at least one of the third and fourth rollers (130, 140). The drive roller (150) is arranged at the drive position, and at the drive position, a part of the conveyor belt (300) is pressed between the drive roller (150) and the third roller (130). A method of manufacturing a conveyor device , wherein another portion of the conveyor belt (300) is pressed between the drive roller (150) and the fourth roller (140) . The pivot member (160) extends from the third roller (130) toward the first roller (110) with the first unit (51) attached to the second unit (52). The second of the conveyor belt (300) that extends along the first section (310) of the conveyor belt (300) or extends from the fourth roller (140) toward the second roller (120). The method of manufacturing a conveyor device according to claim 12, which extends along a section (320) . The first unit (51) is not attached to the second unit (52), the distance (W5) between the third and fourth rollers (130, 140) is the minimum, and the drive roller (150). ) Is arranged adjacent to each of the third and fourth rollers (130, 140) with the conveyor belt (300) in between, and the rotation shaft (AX5) of the drive roller (150) and the said. When setting a straight line (L1) extending so as to connect the rotation axes (AX3, AX4) of the third or fourth roller (130, 140), the pivot axis of the pivot member (160) is the pivot member. The method for manufacturing a conveyor device according to claim 12 or 13, which is located between the base material (71) on which (160) is mounted and the straight line (L1) . The first unit (51) is attached to the second unit (52), and the rotation shaft (AX5) of the drive roller (150) is the rotation shaft (AX3) of the third or fourth roller (130, 140). , AX4) is located closer to the base material (71) on which the pivot member (160) is mounted than the plane on which the third or fourth roller (130, 140) is mounted. When setting the composite vector (P3) of the tension applied to the conveyor belt (300) starting from AX4), the pivot axis of the pivot member (160) is set by the pivot member (160). The method for manufacturing a conveyor device according to any one of claims 12 to 14, which is located closer to the composite vector (P3) than the mounted base material (71) . Body frame (29) and
A wheelchair including a conveyor device (50) mounted as a seat on the vehicle body frame (29).
In the conveyor device (50), the first and second rollers (110, 120) around which the conveyor belt (300) is wound endlessly and the drive roller (300) around which the conveyor belt (300) is rotated around a part of the outer circumference. The first unit (51) having the 150) and the second unit (52) provided on the vehicle body frame (29) side and to which the first unit (51) is detachably attached , the first unit. In a state where (51) is attached to the second unit (52), the traveling direction of the conveyor belt (300) rather than the portion (390) of the conveyor belt (300) that is turned around the drive roller (150). A second unit (130, 140) including third and fourth rollers (130, 140), which are provided so as to contact the conveyor belt (300) at upstream and downstream positions and sandwich the drive roller (150) from both sides. 52)
At least one of the third and fourth rollers (130,140) is a pivot member (160) urged in a direction that causes a decrease in the spacing (W5) between the third and fourth rollers (130,140). Rotatably supported by
The interval (W5) between the third and fourth rollers (130, 140) can be increased or decreased according to the pressing force applied by the drive roller (150) to at least one of the third and fourth rollers (130, 140). Yes,
In the drive roller (150), a part of the conveyor belt (300) is pressed between the drive roller (150) and the third roller (130), and the drive roller (150) and the fourth roller (140) are pressed. A wheelchair in which another portion of the conveyor belt (300) is rotationally driven in a compressed drive position . A first unit (51) having first and second rollers (110, 120) around which the conveyor belt (300) is wound endlessly, and a second unit (51) to which the first unit (51) is detachably attached. 52)
One of the first and second units (51, 52) includes a drive roller (150) around which the conveyor belt (300) is turned around a part of the outer circumference.
The other of the first and second units (51, 52) is the conveyor that is rotated around the drive roller (150) with the first unit (51) attached to the second unit (52). Contact the conveyor belt (300) at positions upstream and downstream of the belt (300) in the traveling direction of the conveyor belt (300), and sandwich the drive roller (150) from both sides. Including the third and fourth rollers (130, 140) provided in
At least one of the third and fourth rollers (130,140) is a pivot member (160) urged in a direction that causes a decrease in the spacing (W5) between the third and fourth rollers (130,140). Rotatably supported by
The interval (W5) between the third and fourth rollers (130, 140) can be increased or decreased according to the pressing force applied by the drive roller (150) to at least one of the third and fourth rollers (130, 140). Yes,
The pivot member (160) extends from the third roller (130) toward the first roller (110) with the first unit (51) attached to the second unit (52). The second of the conveyor belt (300) that extends along the first section (310) of the conveyor belt (300) or extends from the fourth roller (140) toward the second roller (120). A conveyor device that extends along a section (320) . A first unit (51) having first and second rollers (110, 120) around which the conveyor belt (300) is wound endlessly, and a second unit (51) to which the first unit (51) is detachably attached. 52)
One of the first and second units (51, 52) includes a drive roller (150) around which the conveyor belt (300) is turned around a part of the outer circumference.
The other of the first and second units (51, 52) is the conveyor that is rotated around the drive roller (150) with the first unit (51) attached to the second unit (52). Contact the conveyor belt (300) at positions upstream and downstream of the belt (300) in the traveling direction of the conveyor belt (300), and sandwich the drive roller (150) from both sides. Including the third and fourth rollers (130, 140) provided in
At least one of the third and fourth rollers (130,140) is a pivot member (160) urged in a direction that causes a decrease in the spacing (W5) between the third and fourth rollers (130,140). Rotatably supported by
The interval (W5) between the third and fourth rollers (130, 140) can be increased or decreased according to the pressing force applied by the drive roller (150) to at least one of the third and fourth rollers (130, 140). Yes,
The base material (71) on which the pivot member (160) is mounted pivotally is provided with a recess (72) on which the pivot member (160) is provided on the bottom surface, and / or said. A conveyor device provided with through holes or recesses in which an elastic member (170) for urging a pivot member (160) is at least partially housed .

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