JPH0561504U - Rodless cylinder with brake device - Google Patents

Abstract

(57) [Abstract] [Purpose] In a rodless cylinder with a brake device, the length of the air supply flow passage from the directional control valve to the brake device for air supply is short, and the brake device is operated from the operation of the directional control valve. The air supply time is short and the friction is reduced. [Structure] A slide device is held so that a slide table is slidably mounted on a rail, a brake plate is inserted through the slide table, both ends of the brake plate are fixed to both ends of the rail, and a brake device that presses the brake plate on the slide table is provided. A guide member internally provided with a slit formed at the upper end is disposed on a track, a port block is supported on the guide member so as to be linearly movable, and the port block is connected to a slide table via a port cover, Bands are arranged above and below the slit, the narrow portion of the central portion of the port guide is inserted into the slit of the guide member, and the air passage of the port guide communicates with the brake device and the air passage in the guide member. Has been done.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rodless cylinder which is used to operate actuating members of various machines and has a brake device for stopping a slide table.

[0002]

[Prior Art]

 The applicant has a slide table that reciprocates on a cylinder tube (cylinder body) and a brake device for stopping the slide table. Both ends of a brake plate axially arranged are fixed to the cylinder tube. The brake shoe that clamps the brake plate and the operation part that operates the brake shoe by supplying and discharging the pressure fluid are attached to the slide table, and the cylinder tube is provided with an axial flow path. A tube for supplying and discharging pressure fluid was arranged along the axial direction of the tube, one end of the tube was connected to a slider, and the other end of the tube was equipped with an air supply piston that slides closely in the flow path. A patent application (Japanese Patent Application No. 3-50508) was filed for a rodless cylinder with a brake device.

In the conventional unpublished rodless cylinder with a brake device, as described above, a cylinder tube is provided with an axial flow path, and a pressure fluid supply along the axial direction of the cylinder tube is provided in this flow path. A tube for exhaust is arranged, one end of the tube is connected to a slide table, and the other end of the tube is attached with an air supply piston that slides closely on the flow path. Therefore, there is a drawback that a passage is required to dispose the tube, and the tube and the air supply piston slide in the passage, causing friction. In addition, since the tube also passes through the inside of the end plate, the flow passage becomes long, and the time required for the air to reach the brake device of the rodless cylinder after operating the directional control valve for air supply. It was long.

[0004]

[Problems to be solved by the device]

 In the present invention, in the rodless cylinder with a brake device, the length of the air supply flow passage from the directional control valve to the brake device for air supply is short, and the air is supplied to the brake device from the operation of the directional control valve. The challenge is to reduce the friction time and the friction.

[0005]

[Means for Solving the Problems]

 According to the present invention, in order to achieve the above object, a slide table is slidably held on a track stand, a brake plate is inserted through the slide table, and both ends of the brake plate are fixed to both ends of the track stand. In a rodless cylinder with a brake device in which a brake device that clamps the brake plate is installed on the table, a guide member with a slit at the upper end is arranged on the way, and the port block moves linearly on the guide member. It is supported freely, the port block is connected to the slide table via the port cover, the strips are arranged above and below the slit, and the narrow part of the central part of the port guide is inserted into the slit of the guide member. The air passage of the port guide communicates with the brake device and the air passage in the guide member. A head cover is connected to both ends of the way, so that both ends of the brake plate can be fixed and connected to the head cover.To move the slide table, a rodless cylinder, motor, ball screw and nut are installed. Can be used.

[0006]

[Action]

 When air for releasing the brake device is supplied to the brake device through the air passage of the port guide and the flow passage communicating with the brake device and the air passage in the guide member, the brake is released and the slide table can move. Becomes When the slide table is moved, the port guide connected to the slide table via the port cover and the port block is moved together with the slide table. When the air for releasing the brake device is discharged and the air for the brake lock is supplied through another air supply tube as needed, braking force is generated and the slide table stops.

[0007]

【Example】

 A rodless cylinder with a brake device according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a vertical cross-sectional front view of a rodless cylinder with a brake device according to a first embodiment (the vertical cross-section is appropriately cut to clearly show the main part). The left half shows a state in which the brake device is locked, and the right part. Half shows the brake system is open. 2 is a partial cross-sectional view of the side view of FIG. 1, and FIG. 3 is a partial cross-sectional side view of the air supply device. 4 is an enlarged view of the main part (air supply device) of FIG. 1, and FIG. 5 is an enlarged view of the main part of FIG. A first head cover 4 and a second head cover 5 are connected to both ends of the track base 1, and a slide base 29 of a slide table 2 is slidably supported on the track base 1 via guides 6 and 7. A tube 24 of a rodless cylinder is arranged in the lateral groove 23 of the way 1, and both ends of the tube 24 are fixed to the first head cover 4 and the second head cover 5. The outer moving element 3 is slidably fitted on the outer peripheral surface of the tube 24 of the rodless cylinder, and two yokes 35 and 36 are mounted on the tube 24 at the front and rear positions of the outer moving element 3. The upper ends of the two yokes 35 and 36 are fixed to the lower surface of the slide base 29, and the linear movement of the external moving element 3 is transmitted to the slide base 29 and the slide table 2 via the two yokes 35 and 36.

Next, the brake device will be described. A center plate 28 and a table 27 are continuously provided above the slide base 29, and an air chamber (upper air chamber 25 / lower air chamber 26) is formed between the table 27 and the center plate 28 and communicated with the air chamber. Brake chambers 10 and 11 (two chambers each, a total of four chambers) are formed on the upper surface of the slide base 29 in some places. The slide base 29, the center plate 28, and the table 27 that are connected in series are referred to as a slide table 2. The brake plates 8 and 9 are inserted through the brake chambers 10 and 11 of the slide table 2 and the brake plate passage 32 between the center plate 28 and the slide base 29, and arranged above the track 1. One end (left end in FIG. 2) of the brake plates 8 and 9 is pulled by a tension bolt 71 and a lock nut 70 and fixed to a brake plate mounting base 72 by a bolt 80, and the other end of the brake plates 8 and 9 (in FIG. 2). The right end) is also fixed in the same way as the one end. In the brake chambers 10 and 11, a pair of brake shoes 12, 13, 14 and 15 are arranged above and below the brake plates 8 and 9, respectively, and the upper brake shoes 12 and 14 are attached to brake holders 16 and 17, respectively. The lower brake shoes 13 and 15 are fixed to the bottom surfaces of the brake chambers 10 and 11, respectively. The lower parts of the brake holders 16 and 17 are slidably and airtightly fitted in the recesses of the slide table 2, and the spring holders 18 and 19 above the brake holders 16 and 17 are recessed in the table 27. , 21 is slidably fitted in the brake holders 16, 17, so that the brake holders 16, 17 do not shift or wobble. The outer peripheral portion of the diaphragm device 22 disposed in the air chamber is sandwiched between the table 27 and the center plate 28, and the holes of the diaphragm device 22 are provided below the collars 33 and 34 above the brake holders 16 and 17. They are mated and sealed between them. The diaphragm device 22 divides the air chamber into an upper air chamber 25 and a lower air chamber 26. An annular groove is formed on the upper surfaces of the brake holders 16 and 17, and springs 30 and 31 are inserted into the annular grooves. Adds directional elasticity. The brake device is configured in this way.

Next, the air supply device 40 for supplying air to the brake device will be described. The air supply device 40 is arranged at the side of the tube 24 above the track 1. A guide member 41 is fixed to the upper part of the way 1, and end blocks 42 and 43 are connected to both ends of the guide member 41 so as to maintain an airtight state, and the end blocks 42 and 43 are supported by the head covers 4 and 5. A port block 44 is supported by guide rollers 45 on the track 1 so as to be linearly movable, and the port block 44 is connected to a slide base 29 via a port cover 46. An air passage 47 having a circular cross section is formed in the center of the guide member 41, and a slit 48 having a predetermined width is formed in the upper portion of the air passage 47 so that it can communicate with the outside through the slit 48. The lower and upper surfaces of the slit 48 are sealed by flexible upper and lower strips 50 and 49, and both ends of the upper and lower strips 50 and 49 are fixed to the end blocks 42 and 43. Due to the pressure of the air acting on the lower surface of the lower strip 49, the lower strip 49 is pressed into the groove below the slit 48, and the air in the air flow path 47 is prevented from leaking. The upper strip 50 is considerably wider than the slit 48, and the wide upper strip 50 covers the upper surface of the slit 48 widely to prevent foreign matter from entering the slit 48. The upper part of the port guide 52 is inserted and connected to the concave groove 51 of the port block 44, and the end cover 53, the scraper 54, and the back-up plate 55 are connected to both ends of the concave groove 51. As shown in FIG. 4, the narrow portion of the central portion of the port guide 52 is inserted into the slit 48, and the slide block 56 is connected to the lower end of the port guide 52 in the air flow path 47. The combined body of the port guide 52 and the slide block 56 moves in the air flow path 47 as the slide table 2 moves. A wear ring 57, a packing 58, and a cover 59 are connected to both ends of the slide block 56, and a through passage 60 is provided in the slide block 56. Both ends of the through passage 60 are provided with air passages through holes in the cover 59. Connected to 47. The air flow path 47 communicates with an air pressure source (not shown) via a supply port 68 of the end block 42 (43) and a direction control valve (not shown). Air passages 61, 62, 63, 64 and 65 are formed in the slide block 56, the port guide 52, the port block 44, the port cover 46 and the slide table 2, respectively, and the through passage 60 has air passages 61, 62, 63, It communicates with the lower air chamber 26 via 64 and 65. As shown in FIG. 3, the guide roller 66 and the coupler 67 are arranged in the concave portion of the upper portion of the port guide 52, and the upper strip 50 is placed in the concave groove 51 of the port block 44. Is inserted into the space. Further, the lower strip 49 is inserted into the space surrounded by the port guide 52 and the slide block 56. The airtight state is maintained even by the insertion of the upper and lower strips 50 and 49. A seal guide 79 is connected to both ends of the port guide 52, and an air passage 69 is arranged along the air supply device 40 of the way 1.

Air is caused to flow into the lower air chamber 26 through the air supply port 68, the air flow path 47, the through passage 60, and the air passages 61, 62, 63, 64, and 65, and the air in the upper air chamber 25 is appropriately changed. When discharged, the diaphragm device 22 moves upward against the elastic force of the springs 30 and 31, and the brake is released as shown in the right half of FIG. Simultaneously with or after the air is supplied to the lower air chamber 26, when the rodless cylinder is operated, the slide table 2 moves on the track 1 and the port block 44 (integrated with the port guide 52 and slide block 56 combined body). When stopping the movement of the slide table 2 moving on the guide member 41, the rodless cylinder is stopped from operating and the air in the lower air chamber 26 is discharged. The brake holders 16 and 17 move downward due to the elastic force of the springs 30 and 31, and the brake plates 8 and 9 are clamped by the pair of brake shoes 12, 13, 14 and 15 (there is a strong force between them). Then, the braking force is generated, the slide table 2 is stopped, and the lock state of the brake shown in the left half of FIG. 1 is obtained. In this state, the elastic force of the springs 30 and 31 is used for brake operation here (exhaust brake), but it can be operated by supplying air to the upper air chamber 25 (pressurization brake). You can also

A rodless cylinder with a brake device according to a second embodiment of the present invention will be described with reference to FIGS. 6 and 7. The second embodiment of the present invention is characterized in that a motor (servo motor, stepping motor) is used to drive the slide table 2. A ball screw 74 is arranged in the lateral groove 23 of the track 1, and both ends of the ball screw 74 are supported by the first head cover 4 and the second head cover 5 via bearings 75. The motor 77 is fixed to the outer surface (left surface in FIG. 7) of the first head cover 4, and the rotation of the output shaft of the motor 77 is transmitted to the ball screw 74 via the key 76. The ball screw 74 is screwed into the nut 78, and the two yokes 35 and 36 are connected to the side surface of the nut 78 at the front and rear positions of the nut 78. The upper ends of the two yokes 35 and 36 are fixed to the lower surface of the slide base 29, and the rotary motion of the motor 77 is converted into a linear motion by the ball screw 74 and the nut 78, and the linear motion is transferred through the two yokes 35 and 36. It is transmitted to slide base 29 and slide table 2. The rest of the configuration of the second embodiment is the same as that of the first embodiment, and for that part, the same reference numerals as those of the first embodiment are entered in FIGS. 6 and 7 and their explanations are omitted. ..

[0012]

[Effect of the device]

 In the present invention, a guide member having a slit formed at the upper end is arranged on a track, the port block is supported on the guide member so as to be linearly movable, and the port block is connected to a slide table via a port cover. Bands are arranged above and below the slit, and the narrow portion of the center of the port guide is inserted into the slit of the guide member, and the air passage of the port guide is connected to the brake device and the air passage in the guide member. It came to be passed. Therefore, the air supply tube and the like are not exposed to the outside, which is safe and has a good appearance. In the present invention, the length of the air supply flow passage from the directional control valve to the brake device for supplying air is short, and the time during which the air is supplied to the brake device from the operation of the directional control valve is short.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a rodless cylinder with a brake device according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional side view of a rodless cylinder with a brake device according to a first embodiment of the present invention.

FIG. 3 is a partial cross-sectional side view of an air supply device according to a first embodiment of the present invention.

FIG. 4 is an enlarged view of a main part (air supply device) of FIG.

5 is an enlarged view of a main part of FIG.

FIG. 6 is a vertical sectional front view of a rodless cylinder with a brake device according to a second embodiment of the present invention.

FIG. 7 is a partial cross-sectional side view of a rodless cylinder with a brake device according to a second embodiment of the present invention.

[Explanation of symbols]

 1 Way 2 Slide table 8, 9 Brake plate 41 Guide member 44 Port block 46 Port cover 48 Slit 49 Lower strip 50 Upper strip 52 Port guide 61 to 65 Air passage

Claims (1)

[Scope of utility model registration request] 1. A brake in which a slide table is slidably held on a track stand, a brake plate is inserted through the slide table, both ends of the brake plate are fixed to both ends of the track stand, and a brake plate is clamped on the slide table. In a rodless cylinder with a brake device in which the device is installed, a guide member with a slit formed at the upper end is arranged on the way, the port block is supported on the guide member so that the port block is linearly movable, and the port block is the port block. It is connected to a slide table via a cover, strips are arranged above and below the slit, the narrow portion of the central portion of the port guide is inserted into the slit of the guide member, and the air passage of the port guide serves as a brake device. A rodless cylinder with a brake device, which is in communication with an air flow path in a guide member.