WO2005073557A1

WO2005073557A1 - Apparatus and method for mounting shoes on a piston for a swash plate type compressor

Info

Publication number: WO2005073557A1
Application number: PCT/KR2004/000025
Authority: WO
Inventors: Ki-Yeon Kim
Original assignee: Halla Climate Control Corporation
Priority date: 2004-01-29
Filing date: 2004-01-29
Publication date: 2005-08-11
Also published as: WO2005073557A8; CN100572804C; JP2007518020A; JP4519857B2; CN1902400A

Abstract

Provided are an apparatus and method for easily mounting a lower show and an upper shoe on a piston of a swash plate type compressor, thereby improving work efficiency. The apparatus includes a piston feeder 30 supporting and feeding at least one piston 10; a guide rail 20 which is inserted in a swash plate insertion space 15 of the piston, includes a first receiving space 21 and a second receiving space 22, and has the same thickness as a peripheral portion of a swash plate 2; a first insertion unit 110 or 310 which includes at least one lower shoe drop-hole 130 or 330 and at least one first mounting unit that mounts a lower shoe 11 on a lower shoe mount portion 13 through the lower shoe drop-hole, and inserts the lower shoe drop-hole 130 or 330 into the first receiving space 21; and a second insertion unit 210 or 410 which includes at least one upper shoe receiving portion 230 or 430 and at least one second mounting unit that mounts an upper shoe 12 received in the upper shoe receiving portion on an upper shoe mount portion 14, and inserts the upper shoe receiving portion 230 or 430 into the second receiving space.

Description

APPARATUS AND METHOD FOR MOUNTING SHOES ON A PISTON FOR A SWASH PLATE TYPE COMPRESSOR

Technical Field The present invention relates to an apparatus and method for mounting shoes on a piston for a swash plate type compressor, and more particularly, to an apparatus and method for mounting a lower shoe and an upper shoe on a piston fed along a guide rail.

Background Art A swash plate type compressor is used for an air conditioning apparatus of an air conditioning system for vehicles. FIG. 1 illustrates a schematic cross-section of the swash plate type compressor. Shoes 11 and 12 are rotatably mounted on the lower and upper portions, respectively, of a swash plate insertion space 15 of a piston 10, and a swash plate 2 is inserted between the two shoes 11 and 12 so that the shoes 11 and 12 can slide with respect to the swash plate 2. As a result, as the swash plate 2 fixed with a predetermined slope with respect to a rotation shaft 3 rotates, the piston 10 moves up and down, performing compression. Manufacturing such a swash plate type compressor requires a process of inserting the swash plate 2 between the lower shoe 11 mounted at a lower shoe mount portion 13 and the upper shoe 12 mounted at an upper show mount portion 14. The lower shoe 11 and the upper shoe 12 face each other upward and downward, respectively, and have a hemisphere shape. Accordingly, it is not easy to manually and stably dispose the lower and upper shoes 11 and 12 at the lower and upper shoe mount portions 13 and 14, respectively, and insert the swash plate 2 therebetween. Moreover, these disposing and inserting operations decreases work efficiency. Disclosure of the Invention The present invention provides an apparatus and method for easily mounting a lower show and an upper shoe on a piston of a swash plate type compressor, thereby improving work efficiency. According to an aspect of the present invention, there is provided an apparatus for mounting shoes on a piston for a swash plate type compressor. The apparatus includes a piston feeder which supports and feeds at least one piston; a guide rail which is inserted in a swash plate insertion space of the piston, the guide rail comprising a first receiving space and a second receiving space which are formed by recessing one side of the guide rail, the guide rail having the same thickness as a peripheral portion of a swash plate; a first insertion unit which comprises at least one lower shoe drop-hole and at least one first mounting unit that mounts a lower shoe on a lower shoe mount portion of the piston through the lower shoe drop-hole, the first insertion unit inserting the lower shoe drop-hole into the first receiving space; and a second insertion unit which comprises at least one upper shoe receiving portion and at least one second mounting unit that mounts an upper shoe received in the upper shoe receiving portion on an upper shoe mount portion of the piston, the second insertion unit inserting the upper shoe receiving portion into the second receiving space. According to another aspect of the present invention, there is provided an apparatus for mounting shoes on a piston for a swash plate type compressor. The apparatus includes a piston feeder which supports and feeds at least one piston; a guide rail which is inserted in a swash plate insertion space of the piston, the guide rail comprising a first receiving space and a second receiving space which are formed by recessing one side of the guide rail, the guide rail except a portion, in which a guide rail slope is formed starting from the second receiving space in a piston feed direction, having the same thickness as a peripheral portion of a swash plate; a first insertion unit which comprises at least one lower shoe drop-hole and at least one first mounting unit that mounts a lower shoe on a lower shoe mount portion of the piston through the lower shoe drop-hole, the first insertion unit inserting the lower shoe drop-hole into the first receiving space; a second insertion unit which has a circular table shape and is rotated by a predetermined angle by a cylindrical support and comprises at least one upper shoe receiving portion and at least one second insertion unit slope that extends from the upper shoe receiving portion and continues to the guide rail slope, the second insertion unit inserting the upper shoe receiving portion and part of the second insertion unit slope into the second receiving space; and an upper shoe feeder which moves an upper shoe received in the upper shoe receiving portion together with the piston along the second insertion unit slope and the guide rail slope when the piston is moved out from the second insertion unit so that the upper shoe is mounted on an upper shoe mount portion of the piston. According to still another aspect of the present invention, there is provided an apparatus for mounting shoes on a piston for a swash plate type compressor. The apparatus includes a piston feeder which supports and feeds at least one piston; a guide rail which is inserted in a swash plate insertion space of the piston, the guide rail comprising an insertion unit receiving space formed by recessing one side of the guide rail, the guide rail having the same thickness as a peripheral portion of a swash plate; and an insertion unit which comprises at least one first mounting set and at least one second mounting set, the first mounting set comprising a lower shoe drop-hole and a first mounting unit that mounts a lower shoe on a lower shoe mount portion of the piston through the lower shoe drop-hole, the second mounting set comprising an upper shoe receiving portion and a second mounting unit that mounts an upper shoe received in the upper shoe receiving portion on an upper shoe mount portion of the piston, the insertion unit alternately inserting the lower shoe drop-hole and the upper shoe receiving portion into the insertion unit receiving space. According to still another aspect of the present invention, there is provided an apparatus for mounting shoes on a piston for a swash plate type compressor. The apparatus includes a piston feeder which supports and feeds at least one piston; a guide rail which is inserted in a swash plate insertion space of the piston, the guide rail comprising an insertion unit receiving space formed by recessing one side of the guide rail, the guide rail except a portion, in which a guide rail slope is formed starting from the insertion unit receiving space in a piston feed direction, having the same thickness as a peripheral portion of a swash plate; and an insertion unit which has a circular table shape and is rotated by a predetermined angle by a rotation shaft and comprises at least one first mounting set and at least one second mounting set, the first mounting set comprising a lower shoe drop-hole and a first mounting unit that mounts a lower shoe on a lower shoe mount portion of the piston through the lower shoe drop-hole, the second mounting set comprising an upper shoe receiving portion and a insertion unit slope that extends from the upper shoe receiving portion and continues to the guide rail slope, the insertion unit alternately inserting the lower shoe drop-hole and the upper shoe receiving portion into the insertion unit receiving space. According to still another aspect of the present invention, there is provided a method of mounting shoes on a piston for a swash plate type compressor. The method includes engaging a piston to a guide rail through a swash plate insertion space of the piston, the guide rail comprising a first receiving space and a second receiving space, which are formed by recessing one side of the guide rail, and having the same thickness as a peripheral portion of a swash plate; moving the piston to the first receiving space; inserting a lower shoe drop-hole into the swash plate insertion space and moving a slider in a horizontal direction to open the lower shoe drop-hole, thereby mounting a lower shoe on a lower shoe mount portion of the piston; moving the piston to the second receiving space; and inserting an upper shoe receiving portion into the swash plate insertion space and moving an elevator upward, thereby mounting an upper shoe on an upper shoe mount portion of the piston. According to still another aspect of the present invention, there is provided a method of mounting shoes on a piston for a swash plate type compressor. The method includes engaging a piston to a guide rail through a swash plate insertion space of the piston, the guide rail comprising a receiving space formed by recessing one side of the guide rail and having the same thickness as a peripheral portion of a swash plate; moving the piston to the receiving space; inserting a lower shoe drop-hole into the swash plate insertion space and moving a slider in a horizontal direction to open the lower shoe d rop-hole, thereby mounting a lower shoe on a lower shoe mount portion of the piston; and inserting an upper shoe receiving portion into the swash plate insertion space and moving an elevator upward, thereby mounting an upper shoe on an upper shoe mount portion of the piston.

Brief Description of the Drawings FIG. 1 is a cross-section of a swash plate type compressor. FIG. 2 is a plane view of an apparatus for mounting shoes on a piston for a swash plate type compressor, according to a first type of a first embodiment of the present invention. FIG. 3 is a partial cut-away view of the apparatus shown in FIG. 2, in which a first mounting unit is holding a lower shoe. FIG. 4 is a partial cut-away view of the apparatus shown in FIG. 2, in which the first mounting unit is mounting the lower shoe on the piston. FIG. 5 is a partial cut-away view of the apparatus shown in FIG. 2, in which a second mounting unit is holding an upper shoe. FIG. 6 is a partial cut-away view of the apparatus shown in FIG. 2, in which the second mounting unit is mounting the upper shoe on the piston. FIG. 7 is a plane view of an apparatus for mounting shoes on a piston for a swash plate type compressor, according to a second type of the first embodiment of the present invention. FIG. 8 is a plane view illustrating a second insertion unit and an upper shoe feeder in an apparatus for mounting shoes on a piston for a swash plate type compressor, according to a second embodiment of the present invention. FIG. 9 is a cross-section taken along the line IX-IX shown in FIG. 8. FIG. 10 is a plane view of an apparatus for mounting shoes on a piston for a swash plate type compressor, according to a third embodiment of the present invention. FIG. 11 is a plane view of an apparatus for mounting shoes on a piston for a swash plate type compressor, according to a fourth embodiment of the present invention.

Best mode for carrying out the Invention Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. Referring to FIG. 2, in an apparatus for mounting shoes on a piston for a swash plate type compressor, according to a first type of a first embodiment of the present invention, a first insertion unit 110 and a second insertion unit 210 have a circular table shape. The apparatus of the first type includes a guide rail 20, a piston feeder 30, the first insertion unit 110, and the second insertion unit 210. The guide rail 20 serves to stably keep a lower shoe 11 and an upper shoe 12, which will be mounted on the piston 10, in the lower shoe mount portion 13 and the upper shoe mount portion 14, respectively. Accordingly, it is preferable that the thickness of the guide rail 20 is the same as a distance between the lower shoe 1 1 and the upper shoe 12 when they are mounted on the lower and upper shoe mount portions 13 and 14, respectively, i.e., the thickness of a peripheral portion of the swash plate 2. The guide rail 20 includes a first receiving space 21 for receiving the first insertion unit 110, a second receiving space 22 for receiving the second insertion unit 210, and a swash plate receiving space 23 receiving the swash plate 2 so that the lower and upper shoes 11 and 12 can be mounted on the piston 10 and then the piston 10 can be continuously moved with the mounted lower and upper shoes 11 and 12. The first and second receiving spaces 21 and 22 and the swash plate receiving space 23 are formed by recessing the guide rail 20. In FIG. 2, the guide rail 20 is discontinued at the first and second receiving spaces 21 and 22. However, as far as the guide rail 20 does not hinder an operation of mounting the lower and upper shoes 11 and 12, the guide rail 20 may be continued at a narrow width at the opposite side to the first and second insertion units 110 and 210. The guide rail 20 does not go beyond the swash plate receiving space 23 so that the piston 10 can be inserted into the swash plate 2. To insert a predetermined number of pistons 10 into the swash plate 2, the piston 10 is moved around the swash plate 2. Here, it is preferable to use a means for guiding the inserted pistons 10 not to escape from the swash plate 2. In the first embodiment of the present invention, the means is implemented by a circular guide 29 surrounding the swash plate 2 and being concentric with the swash plate 2. While moving along the guide rail 20, the piston feeder 30 supports the piston 10 until the swash plate 2 is inserted between the lower and upper shoes 11 and 12 mounted on the piston 10. In FIG. 2, the piston feeder 30 supports and feeds a single piston 10. However, the piston feeder 30 may include a plurality of piston holders, support and feed a plurality of pistons 10, and processes of mounting the lower and upper shoes 11 and 12 on each piston 10 and inserting the piston 10 into the swash plate 2 may be continuously performed. Hereinafter, structures and functions of the first insertion unit 110 and the second insertion unit 120 will be described. A first mounting unit includes a slider 160 and a first actuator 170, and a second mounting unit includes an elevator 260 and a second actuator 270. Each of the first and second actuators 170 and 270 is implemented by an actuator such as a pneumatic cylinder, a hydraulic cylinder, or a linear motor, which enables a linear motion. In the first embodiment, each of the first and second actuators 170 and 270 is implemented by a pneumatic cylinder. The first mounting unit is installed in the first insertion unit 110, as shown in FIG. 3. The first mounting unit may be designed such that the first actuator 170 and the slider 160 are installed through a receiving space formed in a lower surface of the first insertion unit 110 and then supported by a cover (not shown) covering the bottom of the receiving space. A space allowing the slider 160 to move back and forth is formed in the first insertion unit 110. As shown in FIG. 2, when the piston 10 is moved by the piston feeder 30 to the first insertion unit 110 in the first receiving space 21 , the slider 160 which has supported a lower shoe 11 by blocking a lower shoe drop-hole 130, as shown in FIG. 3, is moved backward by the first actuator 170, as shown in FIG. 4, so that the lower shoe 11 is dropped and mounted on the lower shoe mount portion 13. The lower shoe drop-hole 130 has an appropriate size and depth for receiving the lower shoe 11 and has open top and bottom. After the lower shoe 11 is mounted on the lower shoe mount portion 13, the piston 10 is moved by the piston feeder 30 to the second insertion unit 210 in the second receiving space 22 to mount an upper shoe 12 on the upper shoe mount portion 14. To mount a lower shoe 11 on another piston 10, the slider 160 moves forward and blocks the lower shoe drop-hole 130 in the first insertion unit 11 0. The lower shoe 11 is supplied onto the slider 160 by a first supply unit 120. In FIG. 2, the first insertion unit 110 has a circular table shape.

In this case, it is preferable that a first supply un it 120 is separately disposed from the first receiving space 21 and supplies a lower shoe 11 to the first mounting unit by dropping the lower shoe 11 onto the slider 160 through the lower shoe drop-hole 130. In addition, the first insertion unit 110 is rotated by a rotation shaft

180 to repeat the above-described operations. A unit rotation angle of the first insertion unit 110 is not limited to 90° shown in FIG. 2. Moreover, the unit rotation angle of the first insertion unit 110 does not need to be the same as that of the second insertion unit 210 having a circular table shape. The second mounting unit including the second actuator 270 and the elevator 260 is inserted and fixed to a cylindrical support 280, as shown in FIG. 5. The cylindrical support 280 is made separately from the second insertion unit 210 and is coupled to the bottom surface of the second insertion unit 210 to support and rotate the second insertion unit 210. After the second mounting unit is installed in a receiving space formed in the cylindrical support 280, the second insertion unit 210 having a passage allowing the elevator 260 to move up and down is coupled to the cylindrical support 280. When the piston 10 mounted with the lower shoe 11 reaches the second insertion unit 210 received in the second receiving space 22, the elevator 260 which has supported an upper shoe 12 in an upper shoe receiving portion 230, as shown in FIG. 5, is lifted up by the second actuator 270, as shown in FIG. 6, so that the upper shoe 12 is pushed up and mounted on the upper shoe mount portion 14. Here, the top surface of the elevator 260 is on the same level as or a little higher than the top surface of the guide rail 20. Unlike when the lower shoe 11 is mounted, the elevator 260 remains at the above-described lifted position until the piston 10 leaves the second receiving space 22 so that the upper shoe 12 is prevented from escaping from the upper shoe mount portion 14. The upper shoe receiving portion 230 has an appropriate size and depth for receiving the upper shoe 12, and at least upper portion of the upper shoe receiving portion 230 is open. After leaving the second receiving space 22, the piston 10 is moved by the piston feeder 30 to the swash plate 2. In order to mount an upper shoe 12 on another piston 10, the elevator 260 is moved downward in the second insertion unit 210 so that the upper shoe 12 can be supplied to the upper shoe receiving portion 230 by a second supply unit 220. In FIG. 2, the second insertion unit 210 has a circular table shape. In this case, it is preferable that a second supply unit 220 is separately disposed from the second receiving space 22 and supplies an upper shoe 12 to the second mounting unit by dropping the upper shoe 12 onto the elevator 260 through the upper shoe receiving portion 230. In addition, the second insertion unit 210 is rotated by the cylindrical support 280 to repeat the above-described operations. A unit rotation angle of the second insertion unit 210 is not limited to 90° shown in FIG. 2. Referring to FIG. 7, in an apparatus for mounting shoes on a piston for a swash plate type compressor, according to a second type of the first embodiment of the present invention, a first insertion unit 310 and a second insertion unit 410 have a bar shape. Features different from the first type will be described, and features, which are the same as those of the first structure or which those skilled in the art can easily achieve by modifying the first structure, will not be described. The guide rail 20 has the first receiving space 21 , the second receiving space 22, and the swash plate receiving space 23 (not shown in FIG. 7). Unlike the first structure, the first and second receiving spaces 21 and 22 are formed to have a rectangular shape to receive the first and second insertion units 310 and 410 having the bar shape. Since the first insertion unit 310 has the rectangular bar shape, the first insertion unit 310 moves back and forth to be supplied with and mount a lower shoe 11. In other words, the first insertion unit 310 mounts the lower shoe 11 on the lower shoe mount portion 13 through a lower shoe drop-hole 330 and is then moved out from the first receiving space 21 by a first linear driving unit 380. Next, the lower shoe drop-hole 330 is blocked by a slider 360, and a first supply unit (not shown) supplies a lower shoe 11 onto the slider 360. Then, the first insertion unit 310 is re-inserted into the first receiving space 21 to mount the lower shoe 1 1 to a next piston 10. When the piston 10 reaches the second receiving space 22, the second insertion unit 410 having the rectangular bar shape moves in the same manner as the first insertion unit 310 and mounts the upper shoe 12 on the piston 10 using an elevator 460 in the same manner as the second insertion unit 210 of the apparatus of the first type. In the first embodiment of the present invention, both of first and second insertion units have a circular table shape or a rectangular bar shape. However, the first insertion unit may have a circular table shape while the second insertion unit has a rectangular bar shape, or the first insertion unit may have a rectangular bar shape while the second insertion unit has a circular table shape. FIGS. 8 and 9 show a second embodiment of the present invention which has the same structure (not shown) for mounting the lower shoe 11 as the first embodiment but has a different structure for mounting the upper shoe 12 therefrom. Thus, description of mounting the lower shoe 11 will be omitted. In the second embodiment of the present invention, a second insertion unit 510 has a circular table shape that includes a second insertion unit slope 560 in a peripheral portion such that the second insertion unit slope 560 leads to the guide rail 20, and the upper shoe 12 is pushed upward along the second insertion unit slope 560. In other words, when the piston 10 reaches the second insertion unit 510 received in the second receiving space 22, an upper shoe receiving portion 530 is supporting the upper shoe 12, as shown in FIGS. 8 and 9. Then, a support plate 575 is interposed between a wall 574 at an end of the second insertion unit slope 560 and the piston 10, and the second insertion unit slope 560 continues to a guide rail slope 25 of the guide rail 20. In this situation, when the support plate 575 is moved upward along the slopes 560 and 25 together with the piston 1O, the upper shoe 12 on the upper shoe receiving portion 530 gradually goes upward along the slopes 560 and 25 and is mounted on the upper shoe mount portion 14 when the upper shoe 12 reaches an end of the guide rail slope 25. The second insertion unit 510 is not rotated until the support plate 575 and the piston 10 leave the second insertion unit 510. After the support plate 575 leaves the second insertion unit 510, the second insertion unit 510 rotates by a unit rotation angle to mount an upper shoe 12 on a next piston 10, and the upper shoe receiving portion 530 is supplied with an upper shoe 12 by a second supply unit 520. A support plate driver 576 is provided to move the support plate 575 in a piston feed direction. The support plate driver 576 may be coupled to the piston feeder 30, may be movably coupled to the guide rail 20, or may be separately installed. FIG. 10 shows a third embodiment of the present invention in which a first insertion unit and a second insertion unit are combined. Features different from the first embodiment will be described, and features, which are the same as those of the first embodiment or which those skilled in the art can easily achieve by modifying the first embodiment, will not be described. In the third embodiment of the present invention, a first insertion unit and a second insertion unit are integrated into a single insertion unit 610. Hereinafter, a lower shoe drop-hole 631 and a first mounting unit which mounts a lower shoe 11 on the lower shoe mount portion 13 through the lower shoe drop-hole 631 are together referred to as a first mounting set. An upper shoe receiving portion 632 and a second mounting unit which mounts an upper shoe 12 in the upper shoe receiving portion on the upper shoe mount portion 14 are together referred to as a second mounting set. The first and second mounting sets are alternately inserted into the swash plate insertion space 15 in the piston 10 and mount the lower and upper shoes 1 1 and 12, respectively, on the piston 10. In the third embodiment, since both of the upper and lower shoes 1 1 and 12 are mounted using the single insertion table 61 0, it is preferable that both of a first supply unit 621 and a second supply unit 622 are provided in the insertion table 610 in order to supply the lower and upper shoes 1 1 and 12. However, only one supply unit which alternately supplies the lower and upper shoes 11 and 12 may be provided. FIG. 11 shows a fourth embodiment of the present invention in which a first insertion unit and a second insertion unit are combined like the third embodiment. Hereinafter, features different from the third embodiment will be described, and features, which are the same as those of the third embodiment or which those skilled in the art can easily achieve by modifying the third embodiment, will not be described. In the fourth embodiment, unlike the third embodiment, the second mounting set includes an upper shoe receiving portion 730 and an insertion unit slope 760 which extends from the upper shoe receiving portion 730 and continues to the guide rail slope 25. Differences between the fourth and third embodiments due to the second mount set including slopes are the same as difference between the second and first embodiments due to slopes used in the second embodiment. According to the present invention, upper and lower shoes can be easily mounted on a piston for a swash plate type compressor, thereby increasing work efficiency. Although a few embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made in these elements without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Industrial Applicability The present invention can be applied to an apparatus and method for mounting an upper shoe and a lower shoe on a piston for a swash plate type compressor.

Claims

What is claimed is: 1. An apparatus for mounting shoes on a piston for a swash plate type compressor, the apparatus comprising: a piston feeder 30 which supports and feeds at least one piston 10; a guide rail 20 which is inserted in a swash plate insertion space

15 of the piston, the guide rail comprising a first receiving space 21 and a second receiving space 22 which are formed by recessing one side of the guide rail, the guide rail having the same thickness as a peripheral portion of a swash plate 2; a first insertion unit 110 or 310 which comprises at least one lower shoe drop-hole 130 or 330 and at least one first mounting unit that mounts a lower shoe 11 on a lower shoe mount portion 13 of the piston 10 through the lower shoe drop-hole 130 or 330, the first insertion unit 110 or 310 inserting the lower shoe drop-hole 130 or 330 into the first receiving space 21 ; and a second insertion unit 21 0 or 410 which comprises at least one upper shoe receiving portion 230 or 430 and at least one second mounting unit that mounts an upper shoe 12 received in the upper shoe receiving portion 230 or 430 on an upper shoe mount portion 14 of the piston 10, the second insertion unit 210 or 410 inserting the upper shoe receiving portion 230 or 430 into the second receiving space 22.

2. The apparatus of claim 1 , wherein the first insertion unit 110 is rotated by a predetermined angle by a rotation shaft 180 and has a circular table shape.

3. The apparatus of claim 1 , wherein the second insertion unit 210 is rotated by a predetermined angle by a cylindrical support 280 and has a circular table shape.

4. The apparatus of claim 1 , wherein the first insertion unit 310 is moved back and forth by a first linear driving unit 380 and has a bar shape.

5. The apparatus of claim 1 , wherein the second insertion unit 410 is moved back and forth by a second linear driving unit 480 and has a bar shape.

6. The apparatus of claim 1 , wherein the first mounting unit comprises: a slider 160 or 360 which is installed at the first insertion unit 110 or 310 so as to slide and block or open the lower shoe drop-hole 130 or 330; and a first actuator 170 or 370 which is installed at the first insertion unit 110 or 310 and moves the slider 160 or 360 back and forth.

7. The apparatus of claim 1 , wherein the second mounting unit comprises: an elevator 260 or 460 which is installed at the second insertion unit 210 or 410; and a second actuator 270 or 470 which is installed at the second insertion unit 210 or 410 and moves the elevator up and down.

8. The apparatus of claim 1 , further comprising a first supply unit 120 which supplies a lower shoe 1 1 to the first mounting unit.

9. The apparatus of claim 1 , further comprising a second supply unit 220 which supplies an upper shoe 12 to the second mounting unit. 10. An apparatus for mounting shoes on a piston for a swash plate type compressor, the apparatus comprising: a piston feeder 30 which supports and feeds at least one piston

10; a guide rail 20 which is inserted in a swash plate insertion space 15 of the piston, the guide rail comprising a first receiving space 21 and a second receiving space 22 which are formed by recessing one side of the guide rail, the guide rail except a portion, in which a guide rail slope 25 is formed starting from the second receiving space 22 in a piston feed direction, having the same thickness as a peripheral portion of a swash plate 2; a first insertion unit 1 10 or 310 which comprises at least one lower shoe drop-hole 130 or 330 and at least one first mounting unit that mounts a lower shoe 11 on a lower shoe mount portion 13 of the piston through the lower shoe drop-hole 130 or 330, the first insertion unit 110 or 310 inserting the lower shoe drop-hole 130 or 330 into the first receiving space 21 ; a second insertion unit 510 which has a circular table shape and is rotated by a predetermined angle by a cylindrical support 580 and comprises at least one upper shoe receiving portion 530 and at least one second insertion unit slope 560 that extends from the upper shoe receiving portion 530 and continues to the guide rail slope 25, the second insertion unit 510 inserting the upper shoe receiving portion 530 and part of the second insertion unit slope into the second receiving space 22; and an upper shoe feeder which moves an upper shoe 12 received in the upper shoe receiving portion 530 together with the piston 10 along the second insertion unit slope 560 and the guide rail slope 25 when the piston is moved out from the second insertion unit 510 so that the upper shoe is mounted on an upper shoe mount portion 14 of the piston.

11. The apparatus of claim 10, wherein the upper shoe feeder comprises: a support plate 575 which is inserted in the upper shoe receiving portion 530 and supports the upper shoe 12; and a support plate driver 576 which moves the support plate 575 in the piston feed direction.

12. The apparatus of claim 10, wherein the first insertion unit 110 is rotated by a predetermined angle by a rotation shaft 180 and has a circular table shape.

13. The apparatus of claim 10, wherein the first insertion unit 310 is moved back and forth by a first linear driving unit 380 and has a bar shape.

14. The apparatus of claim 10, wherein the first mounting unit comprises: a slider 160 or 360 which is installed at the first insertion unit 1 10 or 310 so as to slide and block or open the lower shoe drop-hole 130 or 330; and a first actuator 170 or 370 which is installed at the first insertion unit 1 10 or 310 and moves the slider back and forth.

15. The apparatus of claim 10, further comprising a first supply unit 120 which supplies a lower shoe 1 1 to the first mounting unit.

16. The apparatus of claim 10, further comprising a second supply unit 220 which supplies an upper shoe 12 to the upper shoe receiving portion 530.

17. An apparatus for mounting shoes on a piston for a swash plate type compressor, the apparatus comprising: a piston feeder 30 which supports and feeds at least one piston 10; a guide rail 20 which is inserted in a swash plate insertion space 15 of the piston, the guide rail comprising an insertion unit receiving space 24 formed by recessing one side of the guide rail, the guide rail having the same thickness as a peripheral portion of a swash plate 2; and an insertion unit which comprises at least one first mounting set and at least one second mounting set, the first mounting set comprising a lower shoe drop-hole 631 and a first mounting unit that mounts a lower shoe 11 on a lower shoe mount portion 13 of the piston through the lower shoe drop-hole 631 , the second mounting set comprising an upper shoe receiving portion 632 and a second mounting unit that mounts an upper shoe 12 received in the upper shoe receiving portion 632 on an upper shoe mount portion 14 of the piston, the insertion unit 610 alternately inserting the lower shoe drop-hole 631 and the upper shoe receiving portion 632 into the insertion unit receiving space 24.

18. The apparatus of claim 17, wherein the insertion unit 610 is rotated by a predetermined angle by a cylindrical support 680 and has a circular table shape.

19. The apparatus of claim 17, wherein the first mounting unit comprises: a slider which is installed at the insertion unit so as to slide and blocks or opens the lower shoe drop-hole 631 ; and a first actuator 671 which is installed at the insertion unit and moves the slider back and forth.

20. The apparatus of claim 17, wherein the second mounting unit comprises: an elevator which is installed at the insertion unit; and a second actuator 672 which is installed at the insertion unit and moves the elevator up and down.

21. The apparatus of claim 17, further comprising a first supply unit 621 which supplies a lower shoe 11 to the first mounting unit.

22. The apparatus of claim 17, further comprising a second supply unit 622 which supplies an upper shoe 12 to the second mounting unit.

23. An apparatus for mounting shoes on a piston for a swash plate type compressor, the apparatus comprising: a piston feeder 30 which supports and feeds at least one piston 1 0; a guide rail 20 which is inserted in a swash plate insertion space 1 5 of the piston, the guide rail comprising an insertion unit receiving space 24 formed by recessing one side of the guide rail, the guide rail except a portion, in which a guide rail slope 25 is formed starting from the insertion unit receiving space 24 in a piston feed direction, having the same thickness as a peripheral portion of a swash plate 2; and an insertion unit 710 which has a circular table shape and is rotated by a predetermined angle by a rotation shaft 780 and comprises at least one first mounting set and at least one second mounting set, the first mounting set comprising a lower shoe drop-hole 731 and a first mounting unit that mounts a lower shoe 11 on a lower shoe mount portion 13 of the piston through the lower shoe drop-hole 731 , the second mounting set comprising an upper shoe receiving portion 730 and a insertion unit slope 760 that extends from the upper shoe receiving portion 730 and continues to the guide rail slope 25, the insertion unit 710 alternately inserting the lower shoe drop-hole 731 and the upper shoe receiving portion 730 into the insertion unit receiving space.

24. The apparatus of claim 23, wherein the insertion unit 710 is rotated by the predetermined angle by the rotation shaft and has the circular table shape.

25. The apparatus of claim 23, wherein the first mounting unit comprises: a slider which is installed at the insertion unit 710 so as to slide and blocks or opens the lower shoe drop-hole 731 ; and a first actuator 771 which is installed at the insertion unit and moves the slider back and forth.

26. The apparatus of claim 23, further comprising a first supply unit 721 which supplies a lower shoe 11 to the first mounting unit.

27. The apparatus of claim 23, further comprising a second supply unit 722 which supplies an upper shoe 12 to the upper shoe receiving portion 730.

28. A method of mounting shoes on a piston for a swash plate type compressor, the method comprising: engaging a piston 10 to a guide rail 20 through a swash plate insertion space 15 of the piston, the guide rail comprising a first receiving space 21 and a second receiving space 22, which are formed by recessing one side of the guide rail, and having the same thickness as a peripheral portion of a swash plate 2; moving the piston 10 to the first receiving space 21 ; inserting a lower shoe drop-hole 130 or 330 into the swash plate insertion space 15 and moving a slider 160 or 360 in a horizontal direction to open the lower shoe drop-hole, thereby mounting a lower shoe 11 on a lower shoe mount portion 13 of the piston; moving the piston 10 to the second receiving space 22; and inserting an upper shoe receiving portion 230 or 430 into the swash plate insertion space 15 and moving an elevator 260 or 460 upward, thereby mounting an upper shoe 12 on an upper shoe mount portion 14 of the piston.

29. A method of mounting shoes on a piston for a swash plate type compressor, the method comprising: engaging a piston 10 to a guide rail 20 through a swash plate insertion space 15 of the piston, the guide rail comprising a receiving space 24 formed by recessing one side of the guide rail and having the same thickness as a peripheral portion of a swash plate 2; moving the piston 10 to the receiving space 24; inserting a lower shoe drop-hole 631 into the swash plate insertion space 15 and moving a slider in a horizontal direction to open the lower shoe drop-hole 631 , thereby mounting a lower shoe 11 on a lower shoe mount portion 13 of the piston; and inserting an upper shoe receiving portion 632 into the swash plate insertion space 15 and moving an elevator upward, thereby mounting an upper shoe 12 on an upper shoe mount portion 14 of the piston.