JP2016052705A - Socket cover structure in nut runner device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve safety at a time of fastening by a socket wrench in a nut runner device and power-up thereof.SOLUTION: A socket cover structure in a nut runner device in which plural stopper pins (43) having a spring (50) between a ring-shaped groove part (40) of a socket cover (10), which is provided at an end part (2Aa) of a nut runner (2A) and on an outer peripheral side of a socket wrench (4), and the end part (2Aa). The socket cover structure is so configured as to make the socket cover (10) as to be movable in axial direction (A) and to achieve safety and power-up during rotation of the socket wrench (4).SELECTED DRAWING: Figure 5

Description

  The present invention relates to a socket cover structure in a nut runner device, and is mainly a novel for improving the safety of a rotating socket wrench by providing a socket cover so as to be axially movable on the outer peripheral side of the socket wrench of the nut runner. Regarding improvement.

As this type of nut runner device conventionally used, for example, the configurations of Patent Documents 1 and 2 can be listed in FIGS. 6 and 7.
That is, in the case of the configuration of Patent Document 1 in FIG. 6, the screw-side socket 17 including the socket portions 19 and 20 and the hexagonal hole portion 201 and the socket portions 14 and 14 at both ends of the cylindrical misalignment absorbing cover 22. A machine-side socket 12 made of 15 and having a square hole 142 is provided.

  In the misalignment absorbing cover 22, a link portion 11 including a body portion 11 and a pair of ball portions 112 and 113 is provided, and between the ball portions 112 and 113 and the socket portions 15 and 19. In addition, the spring 23 is inserted, and the socket portions 14, 15 and 19, 20 are provided in the misalignment absorbing cover 22 in a biased state.

  Accordingly, a motor rotation shaft (not shown) is connected to each hole 142 of the machine-side socket 12, and a tightening bolt (not shown) is engaged with the hexagonal hole 201 of the socket 20. When the motor is driven, the socket part 20 can tighten the bolt.

  Next, the structure of FIG. 7 shows the structure of Patent Document 2. In FIG. 7, a nut socket shaft 6 having a passive gear 7 is rotatably provided in the nut runner device 2. A nut socket 4 holding a nut N and a washer W is provided at the tip of the socket shaft 6.

A socket cover 10 is provided at the tip of the nut runner device 2, and a plurality of holes 12 formed in the radial direction are provided in the opening hole 10 a at the tip of the socket cover 10. A cylindrical case 14 of a ball plunger 11 having a locking ball 13 biased by a spring 15 is provided in the hole 12.
The locking balls 13 are held by the opening shape of the cylindrical case 14 so as not to jump out.

  Therefore, in the configuration of FIG. 7, when the drive gear of the drive source (not shown) is engaged with the passive gear 7, the nut N and the washer W rotate, and the nut N and washer W are rotated in this rotated state. When screwed onto a screw shaft (not shown), the nut N and washer W are screwed onto the screw shaft while being held by the ball plunger 11.

Japanese Patent No. 4841493 Japanese Utility Model Publication No. 6-619

Since the conventional nut runner device is configured as described above, the following problems exist.
That is, in the configuration of Patent Document 1 shown in FIG. 6, since the socket part 20 for tightening the nut is exposed to the outside, it is very dangerous to touch the socket part 20 during work.

  Further, in the case of the configuration of Patent Document 2 shown in FIG. 7, the nut runner portion 2 </ b> A of the nut runner device 2 is screwed to the other bolt in a state where the nut N and the washer W are provided in the socket cover 10. Sometimes, since the socket cover 10 is in a fixed state, the socket cover 10 may come into contact with a fixed part of the other party, which may be an obstacle to nut tightening.

  The present invention has been made to solve the above-described problems, and in particular, by providing a socket cover on the outer periphery of the socket wrench of the nut runner so as to be axially movable, the safety of the rotating socket wrench is improved. An object of the present invention is to provide a socket cover structure in the nut runner device.

  The socket cover structure in the nut runner device according to the present invention is the nut runner device in which the socket wrench of the nut runner portion provided at the front end portion of the casing is rotationally driven by a drive source provided in the casing. It has a socket cover that is axially movable at the end of the nut runner part and biased in one direction by a spring, and the socket cover is arranged coaxially on the outer peripheral side of the socket wrench, Also, a ring-shaped groove formed on the outer periphery of the end portion of the nut runner portion and formed inside the tip of the socket cover whose overall shape is cylindrical, and a plurality of through holes formed in the bottom wall of the ring-shaped groove A stopper pin that operably penetrates each through hole and is fixed to an end of the nut runner portion, and each of the strokes. A stopper head formed on the outer end of the par pin to prevent the socket cover from coming off from the stopper pin; an end of the nut runner portion provided on the outer periphery of the stopper pin; and an inner surface of the bottom wall of the annular groove portion And the socket cover is constantly biased toward the outside with respect to the nut runner portion, and the stopper head is placed on the bottom wall. In the contact state, the rear end of the socket cover is located behind the pin rear end of the stopper pin.

Since the socket cover structure in the nut runner device according to the present invention is configured as described above, the following effects can be obtained.
That is, in the nut runner device in which the socket wrench of the nut runner part provided at the front end portion of the casing is rotationally driven by the drive source provided in the casing, the axial movement is performed at the end part of the nut runner part. It has a socket cover that is freely urged in one direction by a spring, and the socket cover is coaxially disposed on the outer peripheral side of the socket wrench, thereby improving the safety of the rotating socket wrench. Moreover, the contact of the socket wrench with the other party's seat surface can be prevented.
Also, a ring-shaped groove formed on the outer periphery of the end portion of the nut runner portion and formed inside the tip of the socket cover whose overall shape is cylindrical, and a plurality of through holes formed in the bottom wall of the ring-shaped groove A stopper pin that operably penetrates each through hole and is fixed to an end of the nut runner part, and is formed at an outer end of each stopper pin to prevent the socket cover from coming out of the stopper pin. A stopper head and a spring provided on an outer periphery of the stopper pin and provided between an end portion of the nut runner portion and an inner surface of the bottom wall of the annular groove portion, Since the socket cover is always urged outward, the socket wrench does not come into contact with the seating surface of the other party, and a conventional socket is used. Preventing rubbing of the seat surface by the wrench, as a result, it is possible to obtain a rotational torque increase of the socket wrench.
Further, when the stopper head is in contact with the bottom wall, the rear end of the socket cover is located behind the rear end of the stopper pin, so that the rotating socket wrench is connected to the socket. Can be completely covered by a cover.

It is the schematic which shows the nut runner apparatus by this invention. It is a top view of FIG. It is a left view of FIG. It is a left side enlarged view which shows the socket wrench of FIG. It is an expanded sectional view of the principal part of FIG. It is sectional drawing which shows the conventional nut runner apparatus. It is sectional drawing which shows the conventional nut runner apparatus.

  The socket cover structure in the nut runner device according to the present invention is to improve the safety of the rotating socket wrench by providing the socket cover on the outer periphery of the nut wrench so as to be movable in the axial direction.

Hereinafter, preferred embodiments of a socket cover structure in a nut runner device according to the present invention will be described with reference to the drawings.
In addition, the same code | symbol is used for the same or equivalent part as the nut runner apparatus 2 shown in FIG.
In the nut runner device 2 shown in FIG. 1, a drive shaft 34 is provided on the distal end side 33 of a casing 32 having a handle 30 and having a drive source 31 such as a motor. The socket wrench 4 is connected.
The drive source 31 is configured to be driven or not driven by turning on / off a drive switch 36 attached to the casing 32.

  At the outer peripheral position of the socket wrench 4 rotatably provided on the nut runner portion 35, a socket cover 10 having a cylindrical shape as a whole is provided so as to be movable along the axial direction A.

An annular groove 40 is formed inside the tip 10 </ b> A of the socket cover 10, and a plurality of through holes 42 are formed in the bottom wall 41 of the annular groove 40.
A stopper pin 43 is provided through each of the through holes 42 so as to be movable, that is, movable along the axial direction A, and the screw portion 44 of each stopper pin 43 is an end 2Aa of the nut runner portion 2A. The stopper pins 43 are fixed to the nut runner portion 2A by being screwed into the screw holes 44a.

  The stopper head 45 formed at the outer end 43A of each stopper pin 43 contacts the inner surface 41A of the bottom wall 41, and the shape of the stopper head 45 is larger than the diameter of the through hole 42. Therefore, the ring-shaped groove portion 40 is configured not to come out from the stopper head 45 and the socket cover 10 is configured not to come out from the stopper pin 43 to the outside 60.

  A spring 50 is provided on the outer periphery of the stopper pin 43 in a compressed state. The spring 50 includes an end portion 2Aa of the nut runner portion 2A and an inner surface 41A of the bottom wall 41 of the annular groove portion 40. The socket cover 10 is always urged toward the outer side 60 along the axial direction A with respect to the nut runner portion 2A.

As shown in FIG. 5, in the state before the nut (not shown) is tightened using the polygonal hole 51 of the socket wrench 4 of the nut runner portion 2 </ b> A, the tip end surface 10 </ b> Aa of the socket cover 10 is the socket wrench 4. 5 so that the rotating socket wrench 4 does not come into contact with the operator's hand or the like even when the socket wrench 4 is idled in the state shown in FIG. It is comprised so that safety | security can be ensured. The outer periphery 4B of the socket wrench 4 and the inner periphery 40A of the annular groove 40 are kept in non-contact by the gap G.
In the state of FIG. 5, the rear end 10 </ b> B of the socket cover 10 is located behind the pin rear end 43 </ b> B of the stopper pin 43.

  Next, when the nut runner device 2 according to the present invention is used to tighten a nut or a screw (not shown) in the above-described configuration, the socket wrench 4 has a polygonal hole in a state in which the nut is provided, for example, in a bolt. When the socket wrench 4 is rotated by operating the drive switch 36 and the nut 51 is engaged, the front end surface 10Aa of the socket cover 10 is in contact with the seat surface of the device, and only the socket wrench 4 is relatively moved. While moving forward, the socket cover 10 is retracted by the length L1 while compressing the spring 50, and the nut tightening by the socket wrench 4 is completed.

  In the above-described case, only the front end surface 10Aa of the socket cover 10 contacts the seat surface of the apparatus, and the socket wrench 4 does not directly contact the socket wrench 4. Dust or the like due to contact between the socket wrench and the seating surface is not generated, and safe nut tightening can be performed.

The gist of the socket cover structure in the nut runner device according to the present invention is as follows.
In the nut runner device in which the socket wrench 4 of the nut runner part 2A provided at the front end part 33 of the casing 32 is rotationally driven by a drive source 31 provided in the casing 32, the end of the nut runner part 2A is driven. The part 2Aa has a socket cover 10 that is movable in the axial direction A and biased in one direction by a spring 50, and the socket cover 10 is coaxially disposed on the outer peripheral side of the socket wrench 4. The socket cover structure in the nut runner device is characterized in that it is provided on the outer periphery of the end portion 2Aa of the nut runner portion 2A and is formed inside the distal end portion 10A of the socket cover 10 having a cylindrical shape as a whole. A ring-shaped groove 40, a plurality of through holes 42 formed in the bottom wall 41 of the ring-shaped groove 40, A stopper pin 43 operatively penetrating through the through hole 42 and fixed to the end 2Aa of the nut runner portion 2A, and an outer end 43A of each stopper pin 43 formed at the outer end 43A of the socket cover 10 with respect to the stopper pin 43. A spring 50 provided on the outer periphery of the stopper pin 43 and between the end 2Aa of the nut runner 2A and the inner surface 41A of the bottom wall 41 of the annular groove 40. The socket cover structure in the nut runner device is characterized in that the socket cover 10 is constantly biased toward the outer side 60 with respect to the nut runner portion 2A. When the stopper head 45 is in contact with the bottom wall 41, the rear end 1 of the socket cover 10 B is a socket cover structure in the nut runner device being characterized in that a structure which is positioned behind the pin rear 43B of the stopper pin 43.

  In the socket cover structure of the nut runner device according to the present invention, the socket cover is provided on the outer peripheral side of the socket wrench so as to be movable in the axial direction, and the safety and power of the socket wrench can be improved.

DESCRIPTION OF SYMBOLS 2 Nutrunner apparatus 2A Nutrunner part 2Aa End part 4 Socket wrench 4A Front end surface 4B Outer periphery 10 Socket cover 10A Front end part 10Aa Front end face 10B Rear end A Axial direction 30 Handle 31 Drive source 32 Casing 33 Front end side 34 Drive shaft 36 Drive switch 40 annular groove portion 41 bottom wall 42 through-hole 43 stopper pin 43A outer end 43B pin rear end 44 screw portion 45 stopper head 50 spring 51 polygonal hole

Claims (3)

The drive wrench (31) provided in the casing (32) is configured to rotationally drive the socket wrench (4) of the nut runner part (2A) provided at the tip (33) of the casing (32). In the nut runner device,
It has a socket cover (10) that is axially movable (A) at the end (2Aa) of the nut runner part (2A) and biased in one direction by a spring (50),
A socket cover structure in a nut runner device, wherein the socket cover (10) is coaxially arranged on the outer peripheral side of the socket wrench (4).   An annular groove portion (40) formed on the inner side of the tip end portion (10A) of the socket cover (10) provided on the outer periphery of the end portion (2Aa) of the nut runner portion (2A) and having a cylindrical shape as a whole, and A plurality of through holes (42) formed in the bottom wall (41) of the annular groove part (40), and the end parts (2Aa) of the nut runner part (2A) operably passing through the through holes (42). A stopper pin (43) fixed to the stopper pin (43) and an outer end (43A) of the stopper pin (43), and a stopper head for preventing the socket cover (10) from coming off the stopper pin (43) (45) between the end portion (2Aa) of the nut runner portion (2A) provided on the outer periphery of the stopper pin (43) and the inner surface (41A) of the bottom wall (41) of the annular groove portion (40). And the socket cover (10) is constantly biased toward the outside (60) with respect to the nut runner part (2A). Socket cover structure in the nut runner according to claim 1 wherein symptoms.   In a state where the stopper head (45) is in contact with the bottom wall (41), the rear end (10B) of the socket cover (10) is more than the pin rear end (43B) of the stopper pin (43). The socket cover structure in the nut runner device according to claim 2, wherein the rear cover is also positioned rearward.

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