JPH04140215A - Roller support structure - Google Patents

Abstract

PURPOSE:To prevent static electricity from being charged by outwardly fitting a metallic roller cylindrical body into a metallic roller shaft via bearings, and supporting the aforesaid roller cylindrical body by conductive main body frames via support frames made of conductive resin in a support structure for a roller conveyor. CONSTITUTION:Metallic boss members 72 are outwardly fitted in the neighborhood of each one of the both ends of a metallic roller shaft 70 supported between support frames 9A made of conductive resin by means of multi-angle shape engagement, and conductive cylindrical frame members 74 are outwardly fitted in each metallic boss member 72 via each bearing 73. A metallic roller cylindrical body 75 is outwardly fitted in integrally between the end face members 74, so that a carrying roller 71 is thereby formed. By this constitution, even if static electricity is produced in the carrying roller 71, current flows to the roller shaft 70 via each end face member 74, each bearing 73 and the boss member 72, so that current thereby flows from each support frame 9A made of conductive resin to each side frame 1A so as to be grounded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a roller support structure used in a roller conveyor or the like.

BACKGROUND OF THE INVENTION Conventionally, this type of roller has been used, for example, in the Utility Model Industry Co., Ltd.
As shown in Japanese Patent No. 22884, there is provided a shaft in which bearings are fitted onto both ends of the shaft, end members are fitted onto these bearings, and a roller body is fitted between the two end members. Here, the end member is made of a synthetic resin material that is easily molded.

Problems to be Solved by the Invention According to the above-mentioned conventional type, the roller body is charged with static electricity as it is used. As a result, for example, the data stored in the magnetic card attached to the conveyed object may be disturbed, or when a person comes into contact with the magnetic card, the magnetic card may become energized and cause discomfort.

An object of the present invention is to provide a roller support structure that can constantly ground static electricity.

Means for Solving the Problems In order to achieve the above object, the roller support structure of the present invention has a roller support structure in which a metal roller cylinder is externally fitted onto a metal roller shaft via a conductive bearing, and the roller shaft is It is supported by a conductive body frame via a pair of left and right support frames, and at least one of the support frames is made of conductive resin.

Effects According to the configuration of the present invention, static electricity that tends to be charged on the roller cylinder flows to the conductive support frame via the bearing and the roller shaft, and can be grounded via the main body frame. will not be charged.

Example An embodiment of the present invention will be described below based on the drawings.

Reference numeral 1 denotes a conductive body frame with a cross-sectional opening shape, including a pair of left and right side frames IA and IB, and these side frames IA.

It is composed of a base frame IC that connects the lower part of the IB. L-shaped guide portions 2A, 2B are formed on the opposing inner surfaces of the side frames IA, IB, and dovetail groove portions 4A, 4B are formed in the upper portions to allow sliding of the nut bodies 3A, 3B. In addition, on the inner side of the lower part of one side frame IA,
A pair of upper and lower guide rails 7, 8 are disposed in the longitudinal direction of the frame via portions 5 and 6, respectively. Both sides frame I
A.

The lower end of the support frame 9A is fitted onto the inner surface of the IB,
9B is provided so that its position can be freely changed (slidably) in the length direction of the frame. One of the support frames 9A and 9B
A is made of non-conductive resin, and the other support frame 9B is made of conductive resin. Note that both may be made of conductive resin. The surface support frames 9A and 9B are formed in the middle part and are mounted using bolts IOA and IOB passed through the holes 11A and IIB.
are fixed in the changed position by screwing them into the nut bodies 3A, 3B. One support frame 9A is case-shaped, and the lower end to be fitted into the guide portion 2A and the mounting hole 1
1A, and a pair of front and rear cover plate parts 1 that are connected inward from the inner surface of the lower half of the base plate part 12.
3 and a connecting plate part 14 provided between the lower ends of these cover plate parts 13, and a pair of upper and lower through holes 15a, 15 are provided above the hole 11A for mounting the base plate part 12.
b is formed. In addition, the other support frame 9B has a rectangular plate shape,
A pair of locking grooves 16a and 16 are provided on both sides of the hole 11B with open upper and lower end surfaces and inner surfaces in the height direction.
b is formed. Here, the distance L1 from the inner part of the locking grooves 16a, 16b to the mounting hole 11B. L, mounting in one support frame 9A is from hole 11A to through hole 15a,
The distance L□ to 15b is equal to L2. Surface support frame 9A.

A conveying roller 71 is freely rotatably provided between the rollers 9B via a roller shaft 70 made of metal (such as iron). That is, near both ends of the roller shaft 70, there are metal cylindrical boss members 72.
is externally fitted by polygonal fitting, and an electrically conductive cylindrical end face member 74 is externally fitted to the outside of this boss member 72 via a bearing 73 such as a bearing type. and both end face members 7
A metal roller cylindrical body 75 is externally fitted over the four spaces to form an integral body. Therefore, by inserting one end of the roller shaft 70, which has been inserted so as to freely rotate relative to each other, into either of the through holes 15a, 15b, and dropping the other end into either of the locking grooves 16a, 16b from above, the roller shaft 70 can be opened. Perform the installation of
Further, the conveying roller 71 can freely rotate around the roller axis 77. A first support shaft 18 along the roller axis 77 is attached to one support frame 9A so as to be vertically swingable. That is, a bearing hole 19 is formed at the lower end of the base plate part 12, and the inner end of the first support shaft 18 is fitted into the bearing hole 19 so that it can freely swing up and down. Then, a resin L cedar plate part 23 is inserted between the free ends of the cover plate part 13, and this L
The first recess is formed in the vertical board of the cedar board part 23 in the vertical direction.
The outer end of the support shaft 18 is fitted to restrict the vertical swing range of the first support shaft 18. A sprocket 20, which is an example of a passive transport member, is rotatably attached to the first support shaft 18, and a transmission roller 21 is fitted onto the boss portion of the sprocket 20, so that both 20 and 21 can freely rotate together. . The transmission roller 21 is made of urethane rubber, and its outer periphery is able to come into contact with and separate from the lower outer periphery of the conveying roller 71. A first air cylinder device 17 that acts on the first support shaft 18 to bring it into contact is installed between the cylinder rubber receiver 22 attached to the outer end of the first support shaft 18 and the horizontal plate of the L cedar board portion 23. is interposed in. The above-mentioned 17 to 23 constitute one transmission unit 27, and this transmission unit 27 is connected to the support frame 9A.
, 9B, etc., as a pair with the conveying roller 71,
A large number of them are arranged on the main body frame I.

Cheno 30, which is a common driving body interlocked with each sprocket 20, has a driving sprocket 31 and a driven sprocket 3.
2 through a guide sprocket 33, etc., and the driving sprocket 31 is interlocked and connected to the motor 34. Thereby, the chino 30 forms an action path 35a that meshes with each sprocket 20, and a return path 35b located below the action path 35a. In the action path 35a, the cenograph 30 is supported and guided by the guide rail 7 attached to the section 5 coming into contact with it from below, and in the return path 35b, it is similarly attached by the guide rail 8 attached to the section 6. Supported and guided.

The transmission unit 27 includes the conveyance rollers 71,
Most of the conveyance rollers 71a are disposed opposite to each other, except for some conveyance rollers 71a. A control unit 40 is provided for some of the devices. This control unit 40 has the same configuration as the transmission unit 27, and as shown in FIG.
Its inner end is fitted into the bearing hole 19 so that it can freely swing up and down. A cylindrical boss member 43 is rotatably attached to the second support shaft 41, and a brake body 44 made of urethane rubber is fixed to the boss member 43. This brake body 44 has a cylindrical shape, and its outer periphery can freely come into contact with and separate from the lower part of the outer periphery of the conveying roller 71a, and by displacing the phase in the circumferential direction together with the boss member 43, its operating portion can be changed. We are dealing with wear and tear. a second air cylinder device [45] that acts on the second support shaft 41 to bring the brake body 44 into contact;
However, the cylinder rubber receiver 4 attached to the outer end of the second support shaft 41
6 and the horizontal plate of the L-layer plate portion 23. The boss member 43 integrally has a toothless sprocket 50 which is an example of a non-passive wheel.
As shown in FIGS. 1 and 3, the portion facing the chino 30 is formed as a toothless portion 50a, and the remaining portion is formed as a toothed portion 50b. A stopper body 51 that engages between the teeth of the toothed portion 50b is provided on the transmission unit 40 side. That is, the stopper body 51 is, for example, a bolt, which can be inserted into and removed from the support cylinder formed on the base plate part 12 in the direction along the axis of the second support shaft 41, and when the stopper body 51 is inserted, the tip part is inserted between the teeth. rush into.

By arranging the conveying rollers 71, 71a paired with the transmission unit 27 or the control unit 40 at the set pitch Pg on the main body frame 1 as described above, the conveying rollers 71, 71a group can move the conveyance path. Form 53.

Reference numeral 54 indicates a packet which is an example of an object to be transported.

As mentioned above, the conveying rollers 71.71a are paired with the transmission unit 27 or the control unit 40.

For example, as shown in FIG. 4, a plurality of groups A, B, C, . That is, in each group A, B, C...N, the first supply/discharge hose 55 connected to the first air cylinder device 17 group, and the second supply/discharge hose 56 connected to the second air cylinder device 45, Air is supplied from the air supply device 58 via the solenoid valve 57 of the 5th boat.
- It is configured so that it can be selectively connected to the base 59. 60 is a regulator, and 61 is a silencer. Each group A
, B, C, . . . , N are each provided with a photoelectric or other type inventory detector 62.

Next, the conveyance work in the above embodiment will be explained.

Figures 1, 2, and 4 are all group A.

At B, C...N, the solenoid valve 57 is switched to connect the air supply hose 59 to the first supply/discharge hose 55, and the first support shaft 18 is swung upward by the extension of the first air cylinder device 17.
All the transmission rollers 21 are brought into pressure contact with the roller cylinders 75 of the corresponding conveying rollers 71 from below. At this time, the chino 30 is constantly being driven by the motor 34, and therefore all the sprockets 20 engaged with the chino 30 are rotating around the first support shaft 18. Further, the transmission roller 21 is in contact with the lower outer periphery of the roller cylinder 75, thereby forcibly rotating the group of conveying rollers 71, thereby conveying the packet 54 on the conveying path 53 whose entire length is a driving area. be able to. At this time, the second water supply and drainage basin 56 is open, and the second air cylinder device [45 is inactive, causing the second support shaft 41 to swing downward, and as shown in FIG. from the roller cylinder body 75 to the brake body 4
4 are spaced apart. Therefore, no braking action occurs, and the corresponding conveyance roller 71a freely rotates due to the movement of the packet 54.

When the conveyance rollers 71 group are rotating as described above,
Alternatively, when the metal roller cylinder body 75 is stopped, the static electricity that tends to charge the metal roller cylinder body 75 flows to the bearing 73 via the end face member 74, and further flows to the roller shaft 70 via the boss member 72. It flows (earths) to the side frame IA via the support frame 9B made of conductive resin. Therefore, the conveying roller 71 is not charged, and the same applies to some of the conveying rollers 71a.

For example, as shown in group B in FIG. 5, the solenoid valve 57 is switched to connect the air supply hose 59 to the second supply/discharge hose 56, and as shown in FIG. Swing the two supporting shafts 41 upward.

By pressing the brake body 44 against the corresponding conveyance roller 71a from below, it is possible to prevent the conveyance roller 71a from idling, thereby applying a brake to the packet 54 and preventing its conveyance. Note that when the brake body 44 is brought into pressure contact as shown by the virtual line ○ in FIG.
The shaft 55 is opened and the first air cylinder device [17 is inactivated, causing the first support shaft 18 to swing downward, and the transmission roller 21 is moved from the conveyance roller 71 to the transmission roller 21 as shown by the imaginary line Q in FIG. These conveying rollers 71 group are separated from each other and are not driven. For example, when the packets 54 are in the storage state up to group B as shown in FIG. is detected by the device 62. When this detection signal and the detection signal from group B are input, the electromagnetic valve 57 of group A is automatically switched to separate the transmission roller 21 and press the brake body 44 as described above.

This applies a brake to the packet 54 and makes it possible to stop the packet 54 without colliding with the packet 54 in front, as shown by the imaginary line S.

For example, when the packet 54 of group B is carried out, the detection signal from the presence detector 62 of group B disappears, so the solenoid valve 57 of group A is automatically switched to the drive side, and the packet 54 is removed. will be transported to the group B side.

The conductive support frame 9B described above is made of, for example, a conductive resin containing carbon in nylon 6.

Effects of the Invention According to the present invention having the above-mentioned configuration, static electricity that tends to be charged on the roller cylinder can flow to the conductive support frame through the bearing and the roller shaft, and can be grounded through the main body frame. , it is possible to prevent the roller from being charged with electricity. This can eliminate various problems caused by static electricity, such as disturbances in the data stored on the magnetic card and discomfort when touched.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a partially cutaway front view of the transmission unit, FIG. 2 is a partially cutaway front view of the control unit, and FIG. 3 is a partially cutaway front view of the control unit. Partially cutaway side view,
FIGS. 4 and 5 are schematic side views showing the conveyance state, respectively. 1...Body frame, LA, IB...Side frame, 9A. 9B... Support frame, 17... First air cylinder device, 1
8... First support shaft, 19... Bearing hole, 20... Sprocket (passive shaft body), 21... Transmission roller, 27...
...Transmission unit, 30...Cheno (driver), 40
...Control unit, 41...Second spindle, 43...
- Boss member, 44... Braking body, 45... Second air cylinder device, 53... Transport route, 54... Packet (transported object), 55... First wandering hose, 56 ...
2nd supply/discharge hose, 57... Solenoid valve, 62... Stock presence detector, 70... Roller shaft, 71.71a... Conveyance roller, 73... Bearing, 74... End member, 75...
Roller cylinder body, 77...Roller axis center. Agent Yoshihiro Morimoto

Claims (1)

[Claims] 1. A metal roller cylinder is externally fitted onto a metal roller shaft via a conductive bearing, and the roller shaft is supported by a conductive main body frame through a pair of left and right support frames. A roller support structure characterized in that at least one of the support frames is made of conductive resin.