JPH0731007U - Slip ring cleaning tool - Google Patents

Abstract

(57) [Summary] [Purpose] The brush is attached to the rotating part of a continuous rotation type X-ray CT scanner, etc. In a cleaning tool for cleaning a slip ring that is electrically coupled with, the removal and attachment thereof are facilitated and the cleaning effect is improved. [Structure] One holder 1 which holds pads 3 and 4 corresponding to slip rings 31a and 31b, and when attached to a brush mounting tool 42, presses each pad against the corresponding slip ring separately, and a holder 1 The fixture is provided with a fixture 2 that can be mounted by spring force. Then, each pad is formed into a square rod shape and bent into an L-shape, and its bottom portion is pressed against the slip ring with its cross-sectional shape oriented in a direction corresponding to the cross-sectional shape of the contact portion of the slip ring with the brush. Hold in the holder as described.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a continuous rotation type X-ray CT apparatus or the like, which is attached to the rotating part of the scanner and contacts the brush attached to the fixed part to transfer power and signals between the rotating part and the fixed part. The present invention relates to a slip ring cleaning tool for cleaning a slip ring used in a car.

[0002]

[Prior art]

 In a continuous rotation type X-ray CT device, slip rings and brushes are used to supply power from the fixed part (stationary part) of the scanner to the rotating part and to transmit measurement signals from the rotating part to the fixed part. . In this method, a conductor made of a conductor attached to the fixed part is brought into contact with a slip ring made of a conductor attached to the rotating part, and the slip ring and the brush make electrical contact between the rotating part and the fixed part. It is what is joining.

FIG. 3 shows a scanner portion provided with such a slip ring 31 and a brush (brush blocks 32, 33).

By the way, such a slip ring 31 reduces its conductivity as an oxide film is formed on its surface as it is used, or abrasion powder is attached due to friction with a brush. Therefore, it is necessary to clean the surface of the slip ring 31, and a conventional cleaning tool of this type is shown in FIG. 4 together with the slip ring 31 and brush (brush blocks 32, 33).

In FIG. 4, reference numerals 31 and 32 and 33 denote slip rings and brush blocks as in FIG. Each of the brush blocks 32 and 33 has a brush 34 on its lower surface. In FIG. 4, 32 is a brush block for the signal line (signal path) of the scanner, and 33 is a brush block for the power line (power supply path, here, three-phase power supply path).

Reference numeral 41 is a frame of a fixed part of the scanner. 42 and 43 are brush block mounting brackets fixed to the fixed portion frame 41, of which 42 is a signal line brush block mounting bracket and 43 is a power line brush block mounting bracket.

Reference numerals 44 and 45 are slip ring cleaning tools, of which 44 is a signal line slip ring cleaning tool and 45 is a power line slip ring cleaning tool.

Both the brush blocks 32, 33 and the slip ring cleaning tools 44, 45 are mounted on the brush block mounting brackets 42, 43. Normally, the brush blocks 32, 33 are mounted on the brush block mounting brackets 42, 43 and the scanner is used. Electrical connection is made between the rotating part and the fixed part.

At the time of cleaning, the brush blocks 32 and 33 are removed from the brush block fittings 42 and 43 as shown by arrows A and B, and the slip ring cleaning tools 44 and 45 are attached to the brush block fittings 42 and 43. Then, in this state, by rotating the rotating part of the scanner to rotate the slip ring 31, the slip ring cleaning tools 44 and 45 are brought into sliding contact with the surface of the slip ring 31, and the surface of the slip ring 31 is cleaned.

Here, as can be seen from the drawings, the slip ring cleaning tools 44 and 45 include flat plate-shaped holders 44a and 45a, Z-shaped metal fittings 44b and 45b, holders 44a and 45a, and Z-shaped metal fittings 44b and 45b. It is composed of cotton swabs 44c and 45c whose shafts are passed through the holes formed in the holes, and L metal fittings 44d and 45d for pressing the cotton swabs 44c and 45c. The cleaning tools 44, 45 are attached to the brush block mounting brackets 42, 43 from which the brush blocks 32, 33 have been removed as described above, and an alcohol (not shown) is swabs 44c, 45c of the cleaning tools 44, 45. It was sprayed on the tip and the slip ring 31 was rotated to clean it.

[0011]

[Problems to be solved by the device]

 However, the conventional slip ring cleaning tools have the following problems. The conventional cleaning tools 44 and 45 are designed to remove the brush blocks 32 and 33 from the brush block mounting brackets 42 and 43 each time the slip ring 31 is cleaned, and then attach the cleaning tools 44 and 45 thereto. On the contrary, after cleaning, the cleaning tools 44 and 45 are once removed from the brush block mounting brackets 42 and 43, and then the brush blocks 32 and 33 are attached thereto, which is extremely troublesome.

Further, since the swabs 44c and 45c used in the conventional cleaning tools 44 and 45 have rounded tip portions, the slip ring 31, especially the central portion of the groove of the signal line slip ring (the groove center slightly depressed) Part) and the corners of the power line slip ring were not cleaned sufficiently.

Moreover, since the cleaning tools 44 and 45 are divided into the signal line (44) and the power line (45), the number of parts is increased and the management and handling are troublesome, and the above-mentioned two problems are encountered. Occurs in the cleaning tools 44, 45 for the signal line and the power line, which increases the cost as a whole and requires a great deal of time and effort during cleaning, and there is a problem in that there is a portion that cannot be cleaned sufficiently. It was

An object of the present invention is to remove the brush block from the brush block fitting (brush block mounting bracket), and thus to eliminate the trouble of mounting the brush block to the brush block fitting after cleaning, and for the signal line and the power line. Slip rings can be reliably cleaned with both slip rings for use, and the number of parts can be reduced, management and handling can be simplified, and overall cost and labor for cleaning can be significantly reduced. To provide cleaning tools.

[0015]

[Means for Solving the Problems] The above object is to establish an electrical connection between the rotating portion and the fixed portion by contact with a brush attached to the rotating portion and attached to the fixed portion via a brush fixture. In a slip ring cleaning tool for cleaning one or more slip rings, the slip ring holds one or more pads respectively corresponding to the slip rings, and when attached to the brush fixture, each pad corresponds to the corresponding slip ring. The holder is provided with one holder that is pressed against each other, and the holder that is attachable to the brush attachment by spring force. The pad is formed in a square rod shape and is bent into an L shape. The bottom side of the slip ring is oriented with its cross-sectional shape oriented in a direction corresponding to the cross-sectional shape of the contact portion of the slip ring with the brush. To the contact, it is achieved by being held in the holder.

[0016]

[Action]

 For the fixture, attach the holder to the brush fixture (brush block fixture) with spring force. As a result, the brush (brush block) does not have to be removed from the brush fixture, therefore there is no need to attach the brush to the brush fixture after cleaning, and the holder (cleaning implement) can be easily attached to and detached from the brush fixture. .

Further, the pad is formed in a rectangular rod shape and is bent into an L shape, and its bottom portion has its cross-sectional shape oriented in a direction corresponding to the cross-sectional shape of the contact portion of the slip ring with the brush. It is held by the holder so that it can be pressed against the slip ring. This makes it possible to perform reliable cleaning of slip rings with various cross-sectional shapes such as for signal lines and power lines at a low cost without using any special processing on the tip portion with one type of pad. Be seen.

Further, one holder holds one or a plurality of pads respectively corresponding to the slip rings. That is, even if there are a plurality of types of slip rings for signal lines and power lines, or even if there are a plurality of slip rings, there is one holder, in other words, a signal line and power line integrated type. Therefore, the number of parts can be reduced, the management and handling can be simplified, and the overall cost and labor for cleaning can be significantly reduced.

[0019]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of a slip ring cleaning tool according to the present invention, FIG. 2 is a three-sided view ((a) is a plan view, (b) is a side view, and (c) is a front view). is there.

In each drawing, reference numeral 11 is a slip ring cleaning tool of the present invention, which is mainly composed of a holder 1, a mounting bracket 2, and pads 3 and 4 here. In FIGS. 1 and 2, the same reference numerals as those in FIG. 4 indicate the same or corresponding portions.

The holder 1 is provided with square holes into which the pads 3 and 4 are inserted in accordance with the arrangement pitch of the slip rings 31 (31a, 31b). The mounting bracket 2 is made of a leaf spring material having a U-shaped cross section, and can be mounted with a spring force on one side of the mounting bracket 42 of the signal line brush block 32 along the slip ring arrangement direction (therefore, the same as the spring). It can be detached from the mounting bracket 42 against the force).

The holder 1 is attached to the back side of the attachment fitting 2. In this case, the holder 1 is provided with a pair of vertically oriented elongated holes 5, and the screws 6 and 6 are respectively passed through the elongated holes 5 and 5 to open the corresponding screws of the mounting bracket 2. It can be screwed into a hole (not shown) and tightened. Therefore, with the screws 6 and 6 loosened, the holder 1 can be moved up and down as shown by the arrow C (see FIG. 2B), and if the screws 6 and 6 are tightened at the desired position, the holder 1 1 can be fixed, and the pressure contact force of the pads 3 and 4 to the slip rings 31 (31a, 31b) can be adjusted.

There are two types of slip rings 31, a signal line slip ring 31a and a power line slip ring 31b, each having a different cross-sectional shape as shown in the figure. The pads 3 and 4 are formed as follows and attached to the holder 1 so as to ensure cleaning with any cross-sectional shape.

That is, although the pads 3 are for signal lines and the pads 4 are for power lines, they are all formed in the same rectangular rod shape, here, a square rod shape, and are both bent in an L shape. In this state, the bottom portion of the holder 1 is pressed downward by the lower end of the holder 1 to be pressed against the slip rings 31a and 31b. In this case, the cross-sectional shape of the bent bottoms of the pads 3 and 4 is oriented in a direction that matches the cross-sectional shape of the contact portion of the corresponding slip rings 31a and 31b with the brush (see FIG. 4). It is held by the holder 1 so as to be pressed against the slip rings 31a and 31b.

Here, as can be seen from FIG. 2A, the square hole for inserting the pad of the holder 1 is arranged so that the corners of the quadrangle are vertical and horizontal when inserting the pad 3 for the signal line. For insertion of the power line pad 4, open each side of the quadrangle so that the sides are up, down, left, and right. Then, as shown in FIG. 2C, the pads 3 and 4 are passed through the holes and the pads 3 and 4 are bent under each of the pads, so that the cross-sectional shape of the bottom portion of the brushes of the slip rings 31a and 31b ( (See FIG. 4). The slip rings 31a and 31b are pressed into contact with each other in a state in which the cross-sectional shape of the contact portion with (see FIG. 4) is matched.

Next, a procedure for cleaning the slip rings 31 (31a, 31b) using the cleaning tool 11 of the present invention will be described. First, as shown by an arrow D in FIG. 1, the cleaning tool 11 of the present invention is inserted and attached to the brush block 32 with the mounting bracket 2 thereof.

At this time, the holder 1 also functions to hold the pads 3 and 4 and to press the pads 3 and 4 against the slip rings 31a and 31b. It is possible to adjust the pressure contact force of the pads 3 and 4 by loosening the screws 6 and 6 and moving the holder 1 in the direction of arrow C in FIG.

In this state, the I.D. P. A (isopropyl alcohol) or the like is sprayed on the slip rings 31a and 31b and the pads 3 and 4, and the slip rings 31a and 31b are rotated. As a result, the surfaces of the slip rings 31a and 31b are cleaned by the pads 3 and 4 that are in pressure contact with the slip rings 31a and 31b.

In this case, the signal line slip ring 31a has a slightly recessed central portion that comes into contact with the brush (see FIG. 4). Therefore, in order to make it possible to clean the bottom portion of the pad 3, the corner portion of the pad 3 can be cleaned. It is designed to be used (contacted) for cleaning.

The material of the pads 3 and 4 may be a porous material that is appropriately flexible (so-called elastic) and is relatively soft. For example, there are Japanese paper, sponge, felt, etc., but felt is used in the illustrated example. By forming the pads 3 and 4 to be long, when the currently used portion is soiled by cleaning, the tip portions 3a and 4a (see FIG. 2 (b)) are pulled to slip rings 31a, The contact part with 31b can be shifted and it can clean using a new part.

The groove width of the power line slip ring 31b is generally larger than the groove width of the signal line slip ring 31a. Therefore, the width of the pad 4 on the power line slip ring 31b side is the same as that of the signal line slip ring 31b. It is preferable to make it larger than that on the side of the slip ring 31 a. In any case, both pads 3 and 4 have the same shape, which is advantageous in manufacturing and management.

[0032]

[Effect of device]

 As described above, according to the present invention, since the holder is attached to the brush attachment (brush block attachment) with the spring force, the brush (brush block) is not removed from the brush attachment, and therefore the brush is brushed after cleaning. There is no need to attach it to the fixture, and the holder (cleaning tool) can be easily attached to and detached from the brush fixture.

Further, the pad is formed in a square rod shape and is bent into an L shape, and its bottom portion has its cross-sectional shape oriented in a direction corresponding to the cross-sectional shape of the contact portion of the slip ring with the brush. Since it is held by the holder so that it is pressed against the slip ring in this state, it is a pad of one type and without special processing on the tip, that is, at low cost, for signal lines and power lines. Slip rings with various cross-sectional shapes such as those for cleaning are reliably cleaned.

Further, even if there are plural types or plural types of slip rings for signal lines and power lines, there is one holder, in other words, the signal line and power line are integrated, so that the number of parts is reduced. In addition, it has various effects such as simplification of management and handling, and overall reduction of cost and labor for cleaning.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a cleaning tool of the present invention.

FIG. 2 is a three-view drawing showing an embodiment of the cleaning tool of the present invention.

FIG. 3 is a perspective view showing a scanner portion provided with a slip ring and a brush block in a continuous rotation type X-ray CT apparatus, which is taken out and shown.

FIG. 4 is a perspective view showing a conventional cleaning tool together with a slip ring and a brush block portion.

[Explanation of reference symbols] 1 Holder 2 Mounting bracket (mounting tool) 3,4 Pad 5 Oblong hole 6 Screw 11 Slip ring cleaning tool of the present invention 31 Slip ring 31a Signal line slip ring 31b Power line slip ring 32 Scanner signal Brush block for line (signal path) 33 Brush block for power line (three-phase power path) 34 Brush 41 Frame for fixed part of scanner 42 Brush block mounting bracket for signal line (brush mounting tool) 43 Brush block mounting bracket for power line 44 Conventional slip ring cleaning tool (for signal line) 45 Conventional slip ring cleaning tool (for power line) 44a, 45a Holders 44b, 45b Z-shaped metal fittings 44c, 45c Swabs 44d, 45d L metal fittings

Claims (1)

[Scope of utility model registration request] 1. A slip ring, which is attached to a rotating portion and which electrically connects between the rotating portion and the fixed portion by contact with a brush attached to the fixed portion via a brush attachment. In a slip ring cleaning tool to be cleaned, one holder that holds one or a plurality of pads respectively corresponding to the slip rings, and presses the pads to the corresponding slip rings separately when attached to the brush fixture. And a holder that allows the holder to be attached to the brush holder by a spring force. The pad is formed into a rectangular rod shape and is bent into an L shape, and the bottom portion thereof has the cross-sectional shape described above. In order to be pressed against the slip ring in a state corresponding to the cross-sectional shape of the contact portion of the slip ring with the brush,
A slip ring cleaning tool which is held by the holder.