Punch machine

Abstract

The present invention provides a driving machine. In order to avoid enlarging the size of the driving machine and to easily fill the compression chamber with compressed air, the driving machine has a cylinder (12), the cylinder (12) is formed with a piston chamber (14) divided by a piston (13), and a striking head (15) is driven by the piston. The housing (11) has a cylinder shell portion (11a) for accommodating the cylinder (12) and a handle portion (11c), and a pressure storage container (41) is provided in the cylinder (12). The pressure storage container (41) has a bottom wall portion (42) and a top wall portion (43), and is provided with a compression chamber (45) connected to the piston chamber (14).

Description

[0001] The present invention is a divisional application of the invention application with application number 201680024788.7 (international application number PCT / JP2016 / 060935), invention name “Punch Machine” and application date April 1, 2016. Technical Field

[0002] The invention relates to a driving machine for driving fixing members such as nails and staples into driven parts. Background Art

[0003] A driving machine for driving a fixing member such as a nail into a driven part such as a wood, has a striking head for driving the fixing member out from an ejection port of the driving machine. In a driving machine using compressed air as a driving source for the striking head, the striking head is driven by a piston. If the striking head is driven, the fixing member is driven into the driven part by the striking head. The driving machine has a box for accommodating a plurality of fixing members, and the fixing members are sent out from the box to the front of the striking head. Patent document 1 records a driving machine having a piston. The piston has a cylindrical portion and an end wall portion, and is installed in a cylinder in a manner that allows free reciprocating movement.

[0004] Patent document 1 records a driving machine, in which a bellows is installed in a cylinder, the bellows is sealed with compressed air, and can freely expand and contract in the axial direction. In this driving machine, one end of the bellows is fixed to the end wall of the piston, and the other end is fixed to the outer shell on the top side of the cylinder. Patent document 1 also records a driving machine, in which a pressure storage chamber is formed by a piston and a cylinder. In this driving machine, a flange is provided at the open end of the piston, and the flange is in sliding contact with the inner circumferential surface of the cylinder. In order to resist the thrust applied to the piston by the bellows and the compressed air in the pressure storage chamber in the driving direction to cause the piston to move backward in the contraction direction, a cam driven by a motor is engaged on the piston.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Publication No. 2014-69289 Summary of the invention

[0008] Problems to be solved by the invention

[0009] In the case of a driver with a bellows installed inside a cylinder, the striking part of the striking head adopts a dual structure of the bellows and the cylinder. In the case of a driver with a pressure storage chamber divided by a piston and a cylinder, the striking part adopts a dual structure of the piston and the cylinder. The structure of such a dual-structure driver is complicated. In addition, in the case of a driver that makes the pressure storage chamber inside the bellows expand and contract along the axial direction or makes the pressure storage chamber expand and contract by the piston and the cylinder, in order to ensure the volume of the pressure storage chamber, the dimension of the driver in the driving direction, that is, the vertical direction, must be made longer. Therefore, the vertical dimension of the driver becomes larger.

[0010] In this type of driver in which a pressure storage chamber is formed by a piston and a cylinder, a filling valve is installed in the end wall portion on the top side of the cylinder in order to fill the pressure storage chamber with compressed gas. The end wall portion is installed inside the housing. If the filling valve is installed in the end wall portion, the length of the cylinder including the end wall portion becomes longer, and the vertical dimension of the driver becomes larger. In addition, if the filling valve is provided on the end wall portion, it is not easy to use the filling valve to perform the filling operation of compressed gas.

[0011] An object of the present invention is to avoid increasing the size of a driver and to enable easy filling of a compression chamber with compressed air.

[0012] Solutions to Solve Problems

[0013] The driving machine of the present invention has a cylinder in which a piston is set to move freely back and forth and a piston chamber is formed by the above-mentioned piston, and the above-mentioned piston is used to drive the striking head for driving out the fixed part. The driving machine has: a housing, which has a cylinder shell portion that accommodates the above-mentioned cylinder and a handle portion connected to the above-mentioned cylinder shell portion; a pressure storage container, which has a bottom wall portion extending outward from the above-mentioned cylinder and a top wall portion opposite to the above-mentioned cylinder and the above-mentioned bottom wall portion, and forms a compression chamber connected to the above-mentioned piston chamber; and a filling valve, which is arranged on the above-mentioned bottom wall portion and fills the above-mentioned compression chamber with gas.

[0014] Effects of the Invention

[0015] The pressure accumulator container forming the compression chamber communicating with the cylinder chamber has a bottom wall portion extending radially outward from the cylinder, and a filling valve for filling the compression chamber with gas is provided in the space between the cylinder and the cylinder shell portion. Thus, the filling valve can be arranged in the housing using the space between the cylinder and the cylinder shell portion, thereby avoiding enlarging the size of the driving machine and making it easy to fill the compression chamber with compressed air. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a sectional view of a driver according to an embodiment as seen from the side, showing a state in which a striking head is protruding.

[0017] Figure 2 yes Figure 1 Top view of the .

[0018] Figure 3 yes Figure 1 A-A line section view.

[0019] Figure 4 It is a cross-sectional view showing a state in which the striking head moves backward.

[0020] Figure 5 yes Figure 1 B-B line section view.

[0021] Figure 6 It is a partially cut-away front view of a driver according to a modified example.

[0022] Figure 7 This is a partially cut-away rear view of a driver according to another modified example as viewed from the magazine side.

[0023] Figure 8 This is a partially cut-away rear view of a driver according to still another modified example, as viewed from the magazine side.

[0024] Fig. 9 This is a partially cut-away rear view of a driver according to still another modified example, as viewed from the magazine side.

[0025] Fig.10 yes Fig. 9 CC line section view.

[0026] Fig.11 It is a side view of the driver showing a cover member provided on the housing.

[0027] Fig.12 It is a side view showing a part of a driver provided with a cover member according to a modified example.

[0028] Fig.13 It is a sectional view from the side showing the main part of a driver according to another embodiment.

[0029] Fig.14 Yes means Fig.13 An enlarged cross-sectional view of the pressure accumulator vessel is shown.

[0030] Fig.15 yes Fig.13 D-D line section view.

[0031] Fig.16 yes Fig.13 E-E line section view.

[0032] Fig.17 (A) means Fig.13 The illustrated diagram is a plan view of another modified example of the pressure accumulator container, and (B) is a cross-sectional view taken along line FF of (A).

[0033] Fig.18 (A) means Fig.13 1 is a top view of another modified example of the pressure accumulator container shown in FIG. 1 , and (B) is a cross-sectional view taken along line GG of (A). DETAILED DESCRIPTION

[0034] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The same reference numerals are used for the same components in each of the drawings.

[0035] Figure 1 to Figure 5 The driver 10 shown has a housing 11, and the housing 11 includes a cylinder housing 11a for accommodating a cylinder 12, and a motor housing 11b integrated with the front end of the cylinder housing 11a. A handle 11c is integrated with the top side of the cylinder housing 11a along the motor housing 11b. A connecting portion 11d is integrally provided between the front end of the handle 11c and the front end of the motor housing 11b. In this way, the housing 11 includes the cylinder housing 11a, the motor housing 11b, the handle 11c, and the connecting portion 11d. The housing 11 has two housing halves each molded of a resin such as nylon or polycarbonate, and the housing 11 is assembled by docking the two housing halves.

[0036] The cylinder 12 is housed in the cylinder housing 11a, and the piston 13 is arranged in the cylinder hole 12a so as to be freely reciprocating along the axial direction. Figure 1 The upper end of the cylinder 12 is the top, and the lower end of the cylinder 12 is the front end, and it reciprocates between the front end and the top of the cylinder 12. The piston 13 is used to divide the piston chamber 14 by the cylinder hole 12a and the top surface of the piston 13. The striking head 15 is connected to the piston 13, and the striking head 15 is supported in the ejection port 17 provided in the nose 16 of the housing 11 so as to freely reciprocate along the axial direction. A box 18 for accommodating a plurality of fixings is installed in the housing 11, and the fixings in the box 18 are supplied to the ejection port 17 one by one. The fixings supplied to the ejection port 17 are driven into the driven parts such as wood and gypsum board by the striking head 15 connected to the piston 13. When performing the driving operation, the operator holds the handle portion 11c and makes the cylinder 12 face forward to operate the driving machine 10.

[0037] like Figure 2 As shown, the motor housing 11b is arranged offset to one side in the width direction of the driver 10 relative to the handle 11c, and the cassette 18 is arranged tilted in the width direction on the opposite side relative to the motor housing 11b. Figure 1 As shown, the cassette 18 is tilted downward from the rear end toward the front end. However, the cassette 18 may also be configured at a right angle to the cylinder 12.

[0038] The cylinder shell 11a is provided with a protrusion 21 that contacts the outer peripheral surface of the top side of the cylinder 12 and a protrusion 22 that contacts the outer peripheral surface of the front end side of the cylinder 12, and the cylinder 12 is fixed in the cylinder shell 11a by the protrusions 21 and 22. Figure 3 , Figure 4 As shown, a bracket 23 is attached to the front end of the cylinder 12. The bracket 23 includes an end wall portion 23a and a cylindrical portion 23b. The striking head 15 passes through a through hole 24 provided in the end wall portion 23a.

[0039] Figure 1 as well as Figure 3 The state in which the striking head 15 is driven by the piston 13 and reaches the forward limit position (bottom dead center) is shown. Figure 4 The state in which the piston 13 reaches the retreat limit position (top dead center) due to the striking head 15 is shown. In order to absorb the impact of the piston 13 when the piston 13 is driven to the front end of the cylinder 12, a rubber or polyurethane buffer 25 is provided in the bracket 23. The striking head 15 passes through the through hole 24a provided in the buffer 25.

[0040] In order to return the piston 13 Figure 4 In the rearward limit position shown in FIG. 1 , a rotating disc 26 is provided in the motor housing 11b. The rotating disc 26 is provided on a drive shaft 27. The drive shaft 27 is as shown in FIG. Figure 1 As shown in the figure, the bearings 28a, 28b mounted on the motor housing 11b are supported to rotate freely. A rack 31 having a plurality of rack claws 31a is mounted on the striking head 15, and a plurality of pins 32 meshing with the rack claws 31a are mounted on the rotating disk 26 at intervals in the circumferential direction. Figure 1 as well as Figure 3 As shown, the rotation center axis R of the rotating circular plate 26 is offset by a distance C in the radial direction of the cylinder 12 relative to the center axis O1 of the cylinder 12 and is substantially at a right angle to the center axis O1. Figure 1 A cross section of a portion along the rotation center axis R and a cross section of a portion along the center axis O1 are shown.

[0041] In order to drive the rotating disk 26 to rotate, an electric motor 33 is installed in the motor housing 11b. The electric motor 33 includes a stator 33a fixed to the motor housing 11b and a rotor 33b rotatably arranged in the stator 33a. A cooling fan 35 is installed on a motor shaft 34 arranged on the rotor 33b, and cooling air for cooling the electric motor 33 is generated in the housing 11 by the cooling fan 35. The housing 11 is provided with an air intake hole (not shown) for introducing external air and an exhaust hole (not shown) for exhausting the air after cooling the motor.

[0042] The planetary gear type reducer 36 is installed in the motor housing 11b, the input shaft 37a of the reducer 36 is connected to the motor shaft 34, and the output shaft 37b of the reducer 36 is connected to the drive shaft 27. The base end of the motor shaft 34 is supported by a bearing 38a installed in the motor housing 11b so as to be freely rotatable, and the input shaft 37a connected to the front end of the motor shaft 34 is supported by a bearing 38b installed in the reducer bracket 39 so as to be freely rotatable.

[0043] A battery 40 for supplying electric energy to the electric motor 33 is detachably mounted at the rear end of the housing 11. The battery 40 includes a housing 40a and a plurality of battery cells (not shown) housed therein. The battery cells are secondary batteries composed of lithium ion batteries, nickel hydrogen batteries, lithium ion polymer batteries, nickel cadmium batteries, and the like.

[0044] The pressure storage container 41 is provided on the cylinder 12 axially outward of the cylinder 12. The pressure storage container 41 is mounted on the top of the cylinder 12 and has a bottom wall portion 42 extending radially outward of the cylinder 12. The cylindrical portion 44 formed integrally with the top wall portion 43 is mounted on the bottom wall portion 42, and the top wall portion 43 is opposite to the top of the cylinder 12 and the bottom wall portion 42. A compression chamber 45 communicating with the piston chamber 14 is formed inside the pressure storage container 41. The bottom wall portion 42 is as shown in FIG. Figure 5 As shown in the figure, the bottom wall portion 42 is formed of a member having a circular outer peripheral surface, and the center O2 of the bottom wall portion 42 is eccentric from the center axis O1 of the cylinder 12 toward the handle portion 11c by an eccentricity E, and the bottom wall portion 42 is offset in the radial direction relative to the cylinder 12. Therefore, the compression chamber 45 of the pressure storage container 41 is eccentric relative to the center axis O1 of the cylinder 12.

[0045] The diameter of the cylindrical portion 44 of the pressure storage container 41 is larger than that of the cylinder 12, so that the length in the vertical direction including the cylinder 12 and the pressure storage container 41 can be shortened compared to the case where the compression chamber 45 is formed on the top side of the cylinder 12. Thus, the driving machine 10 can be miniaturized.

[0046] An annular protrusion 46 is provided on the inner surface of the bottom wall 42 to be fitted with the cylindrical portion 44, and a seal is provided between the protrusion 46 and the cylindrical portion 44 by a sealing member 47a. An annular protrusion 48 is provided on the outer surface of the bottom wall 42 to be fitted with the cylinder 12, and a seal is provided between the protrusion 48 and the cylinder 12 by a sealing member 47b. The pressure storage container 41 is covered by an outer cover 51 mounted on the cylinder shell 11a, and a sheet-like vibration-proof rubber 52 is inserted between the outer cover 51 and the pressure storage container 41. In addition, an annular vibration-proof rubber 53 is inserted between the protrusion 21 and the cylinder 12.

[0047] The piston chamber 14 and the compression chamber 45 are filled with air as gas. Figure 1As shown, in order to drive the piston 13 at the front end of the cylinder 12 toward the top, the electric motor 33 is used to drive the rotating disk 26 through the reducer 36. Figure 3 If the rotating disc 26 is rotated, the pins 32 on the downstream side of the rotation direction will be sequentially connected with the pins 32 on the downstream side of the rotation direction. Figure 3 The rack claw 31a shown on the lower side of the figure is meshed, so if the pin 32 on the most downstream side in the rotation direction becomes meshed with the rack claw 31a on the lower side, it will be as follows Figure 4 As shown, the piston 13 is driven roughly to the opening at the top of the cylinder 12. In this state, the compressed air in the piston chamber 14 enters the compression chamber 45, and the pressure of the compressed air in the compression chamber 45 is roughly maximum. Next, the rotating circular plate 26 is driven to rotate, and when the engagement between the pin 32 and the rack claw 31a is released, the piston 13 is driven from the top of the cylinder 12 to the front end by the pressure of the compressed air in the compression chamber 45. The rotation angle of the rotating circular plate 26 is detected by an angle detection sensor not shown.

[0048] A push rod (contact arm) 54 is provided on the nose portion 16 so as to be freely reciprocable in the axial direction. A spring force in the direction in which the front end of the push rod 54 protrudes is applied by a compression coil spring 55. When the push rod 54 abuts against the driven component and the push rod 54 retreats against the spring force, a crimping detection sensor (not shown) is activated. A trigger 56 is provided on the handle portion 11c, and when the trigger 56 is operated, a trigger switch 57 is activated.

[0049] A controller 58 is provided in the housing 11, and detection signals from the angle detection sensor, the crimping detection sensor, and the trigger switch 57 are sent to the controller 58. Figure 1 as well as Figure 3 As shown, the trigger 56 is operated based on the piston 13 reaching the forward limit position of the front end of the cylinder 12, and when the push rod 54 abuts the driven component and the trigger switch 57 is turned on, the electric motor 33 is driven. As a result, the rotating disk 26 is driven to rotate, and the piston 13 is driven to the position of the top of the cylinder 12. When the engagement between the pin 32 and the rack claw 31a is released, the piston 13 is driven to the forward limit position by the compressed air in the compression chamber 45, and the fixing member is driven into the driven component by the striking head 15.

[0050] like Figure 3 as well as Figure 4As shown, a flange 61 is provided at the base end of the striking head 15 to abut against the buffer 25, and a connecting portion 62 protrudes upward from the flange 61. The connecting portion 62 enters a recess 63 formed in the piston 13. A long hole 64 extending in the direction of the central axis O1 is provided in the connecting portion 62. A piston pin 65 passing through the long hole 64 is installed on the piston 13, and the long hole 64 is larger than the diameter of the piston pin 65. A retaining ring 66 is installed on the piston 13 as an anti-slip component, and the retaining ring 66 abuts against both ends of the piston pin 65. A sealing component 67 is installed on the outer periphery of the piston 13 to seal between the piston 13 and the cylinder hole 12a.

[0051] In this way, since the striking head 15 is attached to the piston 13 by the piston pin 65 passing through the long hole 64, the striking head 15 can freely swing relative to the piston 13 in the radial direction of the piston 13. When the piston 13 is driven toward the top of the cylinder 12 via the striking head 15 by the rotating circular plate 26, even if the striking head 15 swings, it is possible to prevent the radial external force from acting on the piston 13. As a result, the piston 13 can be driven smoothly by the rotating circular plate 26.

[0052] In order to fill the compression chamber 45 with compressed air, Figure 1 As shown, a filling valve 71 is provided on the bottom wall portion 42 of the pressure storage container 41. The filling valve 71 is fixed to the bottom wall portion 42 by a nut 72 at its base end, and the front end protrudes to the bottom of the bottom wall portion 42, that is, to the cylinder 12 side. A joint portion 73 is provided at the front end of the filling valve 71. When the compressed air is filled into the compression chamber 45, the supply port of various compressed gas supply units such as a compressor, an air pump, and a gas cylinder is connected to the joint portion 73. The filling valve 71 has a check valve installed inside. If the supply port of the compressed air supply unit is connected to the joint portion 73, the check valve is opened, and the compressed gas such as compressed air is filled into the compression chamber 45. If the supply port is removed from the joint portion 73, the filling valve 71 is closed by the check valve.

[0053] In order to connect the supply port to the joint portion 73 of the filling valve 71, an opening portion (not shown) is provided in the housing 11. When the driver 10 is assembled, the filling valve 71 is used and compressed air is supplied to the compression chamber 45 by the compressed air supply unit. In addition, when the air pressure in the compression chamber 45 is reduced, the compressed air is supplied to the compression chamber 45 by the pressure supply unit. On the other hand, when the cylinder 12 is removed from the housing 11, the check valve installed in the filling valve 71 is operated by the operating jig, so that the gas in the compression chamber 45 is discharged to the outside. In addition, the pressure relief valve 81 can also be operated in the same way to discharge the gas in the compression chamber 45 to the outside.

[0054] In order to discharge the compressed air in the compression chamber 45 to the outside when the pressure in the compression chamber 45 exceeds a set value, a pressure relief valve 81 is provided on the bottom wall portion 42. The set value is set to the pressure of the compression chamber 45 required for driving the maximum length of the fastener driven by the driving machine 10.

[0055] like Figure 1 as well as Figure 2 As shown in FIG. 1 , the filling valve 71 and the pressure relief valve 81 are provided on the bottom wall portion 42 protruding radially outward from the cylinder 12, so that the filling valve 71 and the pressure relief valve 81 are arranged in the space formed below the bottom wall portion 42, that is, on the cylinder 12 side. This can prevent the diameter of the cylinder shell portion 11a from being enlarged. In particular, if Figure 1 as well as Figure 2 As shown, if the filling valve 71 and the pressure relief valve 81 are arranged in the space between the handle portion 11c and the cylinder 12, the pressure storage container 41 is arranged toward the handle portion 11c relative to the central axis O1 of the cylinder 12, so that the space below the compression chamber 45 can be effectively utilized to arrange the filling valve 71 and the pressure relief valve 81.

[0056] As described above, the filling valve 71 is arranged in the space between the handle portion 11c and the cylinder 12, so that the compressed air can be easily filled into the compression chamber 45 by the filling valve 71. In addition, the pressure relief valve 81 and the filling valve 71 are arranged in the same space, so when the air (gas) containing oil and water is released from the pressure relief valve 81 to the inside of the cylinder shell portion 11b of the housing 11, it is possible to prevent the air from directly blowing on the electrical components and electronic components.

[0057] Figure 6 1 is a partially cutaway front view showing a modified example of a driver 10. Figure 6 In the embodiment, the filling valve 71 and the pressure relief valve 81 are located on the front side of the cylinder 12 and are mounted on the bottom wall portion 42. Figure 1 In the case shown in FIG. 1 , the filling valve 71 and the pressure relief valve 81 are arranged on the back side of the cylinder 12 between the cylinder 12 and the cylinder shell 11a, and Figure 6 In the driver 10 shown, the cylinder 12 is separated from the Figure 1 The filling valve 71 and the pressure relief valve 81 are arranged on the opposite side of the case shown. In this way, when the filling valve 71 and the pressure relief valve 81 are located on the front side of the cylinder 12 and installed on the bottom wall portion 42 of the pressure storage container 41, the filling valve 71 and the pressure relief valve 81 can also protrude downward from the bottom wall portion 42 of the pressure storage container 41 having a larger diameter than the cylinder 12.

[0058] Figure 7 This is a partially cut-away rear view of another modified example of a driver 10 as viewed from the magazine side. Figure 1Similarly to the driver shown in the figure, the filling valve 71 and the pressure relief valve 81 are provided in the space between the cylinder 12 and the cylinder shell 11b. The filling valve 71 is installed at a substantially right angle to the bottom wall 42, and the pressure relief valve 81 is installed at a substantially right angle to the bottom wall 42. Figure 7 The filling valve 71 shown is inclined toward the inner surface of the housing 11, and the joint portion 73 provided at the front end of the filling valve 71 is close to the inner surface of the housing 11. In this way, if the filling valve 71 is made into an inclined structure, it is easy to connect the supply port of the compressed gas supply unit to the joint portion 73. In order to connect the supply port to the joint portion 73 of the filling valve 71, an opening portion 74 is provided in the housing 11.

[0059] Figure 8 This is a partially cut-away rear view of a driver 10 as another modified example, as viewed from the magazine side. Figure 8 The filling valve 71 shown in the figure has a base 75a mounted on the bottom wall 42 and at a right angle to the bottom wall 42, and a front end 75b bent at a substantially right angle to the base 75a and bent toward the housing 11. The front end 75b is provided with a joint 73. In this way, even if the filling valve 71 adopts a bent structure, the supply port of the compressed gas supply unit can be easily connected to the joint 73. The supply port is connected to the joint 73 of the filling valve 71 from the opening 74.

[0060] Figure 7 as well as Figure 8 The filling valve 71 and the pressure relief valve 81 are shown in the back side of the cylinder 12, that is, the space between the cylinder 12 and the handle portion 11c. Figure 6 Even when the filling valve 71 is arranged on the front side of the cylinder 12 as shown, the filling valve 71 can be made into an inclined structure or a curved structure.

[0061] Fig. 9 1 is a partially cut-away rear view of a driver 10 according to another modified example as viewed from the cassette side. Fig.10 yes Fig. 9 The CC line section view. Fig. 9 For the driver 10 shown in FIG. 1 , the pressure storage container 41 is Fig. 9 The filling valve 71 and the pressure relief valve 81 are installed on the bottom wall 42 of the pressure accumulator 41, which is offset to the right in the middle, that is, offset to the right when viewed from the front, and on the bottom wall 42 of the pressure accumulator 41, which is offset to the right in the lateral direction relative to the cylinder 12. The filling valve 71 has a base 75a installed on the bottom wall 42 and at a right angle to the bottom wall 42, and a rotating part 75c connected to the base 75a via a rotating coupling 76 so as to be freely rotatable. The rotating part 75c is bent in a direction that is approximately at a right angle to the base 75a. If the joint part 73 provided on the rotating part 75c is rotated, it will be as follows Fig.10 As shown by the dotted line in FIG. 7 , the rotating portion 75c protrudes from the opening portion 74. In this way, if the filling valve 71 is a rotating type, the supply port of the compressed gas supply unit can be easily connected to the joint portion 73.

[0062] In such Fig. 9 In the case where the filling valve 71 and the pressure relief valve 81 are arranged on the right side, i.e., the motor housing 11b side, the filling valve 71 and the pressure relief valve 81 can be prevented from protruding laterally from the motor housing 11b. Fig. 9 The opposite side of the case 18 is shown in the figure, and the filling valve 71 and the pressure relief valve 81 can be prevented from protruding laterally from the case 18. In this way, when the filling valve 71 and the pressure relief valve 81 are arranged on either side of the pressure storage container 41, the handle 11c can be brought close to the cylinder 12 and the operability of the driver 10 can be improved. Fig. 9 The filling valve 71 and the pressure relief valve 81 of the structure shown are arranged on Figure 1 Position shown.

[0063] Fig.11 1 is a side view of the driver showing the cover member provided on the housing. An opening 74 is provided at a position of the cylinder shell 11a of the housing 11 opposite to the filling valve 71, and a cover member 77 is provided in the opening 74 so as to be freely attachable and detachable. The cover member 77 is fixed to the housing 11 by a screw member 78. If the screw member 78 is loosened and the cover member 77 is removed, the filling valve 71 and the pressure relief valve 81 are exposed to the outside. In the exposed state, the supply port of the compressed gas supply unit is connected to the joint portion 73 of the filling valve 71.

[0064] Fig.12 It is a side view showing a part of a driver provided with a cover member according to a modified example. Fig.12 The cover member 77 shown in the figure is freely opened and closed on the housing 11 by means of a hinge portion 79. In this way, the cover member 77 can be opened and closed as follows: Fig.11 The shown one is a detachable type, but it can also be an open and close type. Fig.11 as well as Fig.12 In FIG. 1 , the filling valve 71 and the pressure relief valve 81 are shown. Figure 1 As shown in the figure, the space on the back side of the cylinder 12 is arranged between the cylinder 12 and the handle portion 11c, but for Figure 6 to Figure 8 As shown in the figure, the space configuration on the front side of the cylinder 12, or as Fig. 9 In the case of the spatial arrangement on the side surface of the cylinder 12 shown in the figure, the cover member 77 can also be provided in the same manner.

[0065] Fig.13 It is a sectional view showing a main part of a driver 10 according to another embodiment from a side surface. Fig.14 Yes means Fig.13 An enlarged cross-sectional view of the pressure accumulator vessel shown, Fig.15 yes Fig.13 The D-D line section view in the figure, Fig.16 yes Fig.13 The E-E line section view in the figure. Fig.13 The parts shown in the figure are omitted. Figure 1 The driver 10 shown is identical.

[0066] exist Fig.13 In the driver 10 shown, Fig.14 As shown, the pressure storage container 41 includes a first pressure storage container 41a and a second pressure storage container 41b. The first pressure storage container 41a is provided axially outward of the cylinder 12 and has a first bottom wall portion 42a mounted on the top of the cylinder 12. The pressure storage container 41a is provided with a cylindrical portion 44a integrally formed with a top wall portion 43 mounted on the bottom wall portion 42a, and the top wall portion 43 is opposite to the top of the cylinder 12 and the bottom wall portion 42a. A first compression chamber 45a communicating with the piston chamber 14 is formed inside the first pressure storage container 41a. The bottom wall portion 42a is connected to the Figure 1 The bottom wall 42a of the pressure storage container 41 shown is similarly formed of a circular member, and the bottom wall 42a is radially offset toward the handle 11c relative to the cylinder 12. Therefore, the compression chamber 45a of the first pressure storage container 41a is eccentric relative to the central axis O1 of the cylinder 12.

[0067] The second pressure storage container 41b protrudes toward the bottom of the bottom wall 42a along the cylinder 12 with the opening 49 formed in the first bottom wall 42a as the base end, and the second compression chamber 45b in the pressure storage container 41b extends along the cylinder 12. The second pressure storage container 41b has: a second bottom wall 42b extending toward the outside of the cylinder 12 opposite to the opening 49, and a second cylindrical portion 44b integral with the second bottom wall 42b, and the second compression chamber 45b is connected to the piston chamber 14 via the first compression chamber 45a. Fig.14 as well as Fig.15 As shown, the second compression chamber 45 b has an arc-shaped cross section so as to partially surround the cylinder 12 .

[0068] In this way, the second pressure accumulator container 41b is arranged in the opposite direction to the first pressure accumulator container 41a so as to be radially offset, so that the volume ratio of the compressed air stored in the pressure accumulator container 41b can be increased by using the compression chambers 45a and 45b on both sides. Figure 1 The situation shown increases.

[0069] like Fig.13 As shown, the filling valve 71 is provided to protrude downward on the second bottom wall portion 42b. In this case, the filling valve 71 can be arranged at a position offset in the radial direction relative to the cylinder 12 by utilizing the space between the cylinder 12 and the handle portion 11c.

[0070] Fig.17 (A) means Fig.13 A top view of another variation of the pressure accumulator vessel shown in FIG. Fig.17 (B) Yes Fig.17 (A) is a cross-sectional view along the F-F line.

[0071] The pressure storage container 41 and Fig.13 The case shown also has a first pressure accumulator container 41a and a second pressure accumulator container 41b. The filling valve 71 and Fig.13 The difference in the case shown is that the filling valve 71 is provided on the side of the driver 10, that is, on the first bottom wall portion 42a. Fig.17 (A) is disposed on the bottom wall portion 42a so as to be offset downward. If the filling valve 71 is arranged in this way, the gap between the pressure storage container 41b and the housing 11 can be effectively used, and the driving machine 10 can be miniaturized. However, the filling valve 71 may also be disposed toward the bottom wall portion 42a. Fig.17 The filling valve 71 may be provided on the bottom wall portion 42 a so as to be offset to the upper side of (A), or so as to be offset to the front side of the driver 10 .

[0072] Fig.18 (A) means Fig.13 A top view of another modified example of the pressure storage container shown in FIG. Fig.18 (B) Yes Fig.18 (A) is a cross-sectional view taken along line GG. In the driver 10, the filling valve 71 is arranged on the cylindrical portion 44b, i.e., the side wall, of the second pressure storage container 41b. If the filling valve 71 is arranged on the side wall of the pressure storage container 41b, the gap between the pressure storage container 41b and the housing 11 can be effectively utilized, thereby miniaturizing the driver 10.

[0073] In addition, in the above-mentioned embodiment, a DC motor (DC variable frequency motor) using a battery as a power source is described, but it is not limited to this, and a motor (AC variable frequency motor) using an AC power source may also be used. In addition, an AC-DC converter may be used instead of a battery to convert a commercial power source (AC power source) into a DC power source, and supply electric energy to the DC motor (DC variable frequency motor) in the driver.

[0074] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the invention.

[0075] Explanation of symbols

[0076] 10—driver; 11—housing; 11a—cylinder housing; 11b—motor housing; 11c—handle; 12—cylinder; 13—piston; 14—piston chamber; 15—strike head; 16—nose; 17—ejection port; 18—cassette; 23—bracket; 24, 24a—through holes; 25—buffer; 26—rotating circular plate; 27—driving shaft; 31—rack; 31a—rack claw; 32—pin; 33—electric motor; 34—motor shaft; 35—cooling fan; 36—reducer; 39—reducer bracket; 40—battery; 41—pressure storage container; 41a—first pressure storage container; 41b—second pressure storage container; 42—bottom wall; 42a—first bottom wall; 42b—second bottom wall; 43— Top wall portion; 44—cylindrical portion; 44a—first cylindrical portion; 44b—second cylindrical portion; 45—compression chamber; 45a—first compression chamber; 45b—second compression chamber; 48—protrusion; 49—opening portion; 51—outer cover; 54—push rod; 55—compression coil spring; 56—trigger; 57—trigger switch; 58—controller; 61—flange; 62—connecting portion; 63—recess; 64—long hole; 65—piston pin; 66—retaining ring; 67—sealing component; 71—filling valve; 72—nut; 73—joint portion; 74—opening portion; 75a—base; 75b—front end portion; 75c—rotating portion; 76—rotating coupling; 77—cover component; 78—threaded component; 79—hinge portion; 81—pressure relief valve.

Claims

1. A fixing member driving machine, characterized in that: have: piston; a cylinder in which the piston is movable in a first direction and a second direction opposite to the first direction; a pressure storage container configured to be filled with a gas that supplies a driving force to the cylinder to move the piston in the first direction; a striking head connected to the piston in such a manner that the driving force of the piston is applied to the fixing member; a housing having a handle portion extending in a direction intersecting the axial direction of the cylinder, covering the cylinder and the pressure storage container, and having an opening; a rotating member formed to engage with the striking head in a manner that moves the striking head and the piston in the second direction; a valve having a joint portion connectable to an external gas supply portion and configured to allow gas to flow from the external gas supply portion to the pressure storage container; and a cover member for covering the opening of the housing so as to be removable or openable and closable, The interior of the pressure accumulator is connected to the interior of the cylinder, and is configured to extend outward from the cylinder in the radial direction of the cylinder. The valve is connected to a position radially outward of the cylinder in the pressure accumulation container, and extends in a direction intersecting with the axial direction of the cylinder so that the joint portion faces the opening portion.

2. The driver according to claim 1, characterized in that: The joint portion can be connected to the external gas supply portion when the opening portion is opened by the cover member. Even if the external gas supply unit is disconnected from the joint unit, the pressure accumulation container supplies gas to the cylinder so that the piston moves in the first direction.

3. The driver according to claim 1, characterized in that: The housing further comprises a motor housing portion extending along the handle portion. The motor housing is arranged to be offset to one side in the width direction relative to the handle. The opening is arranged on one side in the width direction of the housing.

4. The driver according to claim 1, characterized in that: A pressure relief valve is further provided, and the pressure relief valve is configured to discharge gas from the pressure accumulation container.

5. The driver according to claim 1, characterized in that: The cover member is fixed to the housing by a screw member so as to cover the opening of the housing.

6. The driver according to claim 1, characterized in that: The housing comprises a first part and a second part. The first part and the second part are connected to each other in a manner of forming the housing. Even when the opening of the housing is opened by the cover member, the first portion and the second portion maintain a state of being connected to each other so as to form the housing.

7. The driver according to claim 1, characterized in that: The joint portion is disposed between a central axis of the cylinder and the handle portion in a direction in which the handle portion extends.

8. A fixing member driving machine, characterized in that: have: piston; a cylinder in which the piston is movable in a first direction and a second direction opposite to the first direction; a pressure storage container configured to be filled with a gas that supplies a driving force to the cylinder to move the piston in the first direction; a striking head connected to the piston in such a manner that the driving force of the piston is applied to the fixing member; a housing having a handle portion extending in a direction intersecting the axial direction of the cylinder and covering the cylinder and the pressure storage container; a rotating member formed to engage with the striking head in such a manner as to move the striking head and the piston in the second direction; and The valve has a joint portion that can be connected to an external gas supply portion and allows gas to flow from the external gas supply portion to the pressure storage container. The housing further comprises a motor housing portion extending along the handle portion. The motor housing is arranged to be offset to one side in the width direction relative to the handle. The pressure storage container is mounted on the top of the cylinder, and the interior of the pressure storage container is connected to the interior of the cylinder, and is configured to extend outward from the cylinder at least on one side of the width direction relative to the cylinder. The joint portion is disposed at a position in the pressure accumulator container that is offset to one side in the width direction with respect to the cylinder.

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