JPH0611972U - Tool for replacing socket of bolt tightening machine - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] Replace the socket unit of the shear bolt tightening machine. [Structure] A polygonal portion having an engaging piece 71 for screw engagement at the tip of the shaft body 7 and having different diagonal lengths on the shaft body 7 according to the size of each type of inner socket of the tightening machine. A tool 5 in which 81, 62, 63 are formed in a plurality of stages in order of size is used. The inner socket is engaged with a polygonal portion of a corresponding size among the polygonal portions 81, 62, 63 of the tool 5 having a plurality of stages. Push the tool while turning it to fit the inner socket into the socket holder by spline fitting and push the outer socket 3 into the proper position. The tool 5 is removed, and the screw for fixing the outer socket is tightened using the engaging piece 71 at the tip to fix the outer socket to the outer socket holder.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tool for replacing a socket of a tightening machine for tightening a shear bolt.

[0002]

[Prior art]

 As shown in FIG. 9, a shear bolt (9) has conventionally been used to connect the steel frames (94). The shear bolt (9) is equipped with a shearing tip (91) at its tip and can be tightened by a dedicated tightening machine (1).

The tightening machine (1) includes an inner socket (2) that engages with the tip (91) of the shear bolt (9) and an outer socket (3) that engages with a nut (93) screwed into the socket. ) Is concentrically attached to the tip of the case (11) and the inner socket (2) and the outer socket (3) are tightened in opposite directions to shear the tip (91) and apply a constant torque. You can tighten the nuts and nuts. The inner socket (2) and the outer socket (3) make up a socket unit, and several types of socket units are prepared according to the size of the bolts and nuts, and then replaced and used. However, it was inconvenient because there was no dedicated tool for replacing this socket unit. Next, the reason for the inconvenience will be described from the structure of the tightening machine (1).

<Structure of Fastening Machine> As shown in FIG. 9, the fastening machine (1) is concentrically rotatable with an outer socket holder (31) and an inner socket holder (4) at the tip of the case (11). The outer socket holder (31) is screwed to the outer socket (3), and the inner socket (2) is fitted to the tip of the inner socket holder (4) by spline coupling so as to be slidable in the axial direction. The outer socket holder (31) and the inner socket holder (4) are connected to the motor (13) through the planetary gear reduction mechanism (14) and the gear transmission mechanism (15), and the outer socket holder (31) is a planetary gear. The output shaft (14a) of one of the two output shafts of the reduction mechanism (14) is connected, and the inner socket holder (4) is linked to the other output shaft (15a). It is configured to be received by the other holder. As shown in FIG. 10, the outer socket (3) has an inward flange (34) projecting from the inner end of the nut engagement hole (30), and a large diameter step (20) on the outer periphery of the inner socket (2). It comes into contact with the inward flange (34) to prevent it from being pulled out, and is urged by the spring (29) in the protruding direction. An anti-slipping mechanism is connected to the inner socket (2). The anti-slipping mechanism prevents the nut from rotating while being insufficiently fitted in the outer socket (3) and damaging the corners of the nut to run idle.

<Structure of Anti-Slipping Mechanism> As shown in FIG. 10, the anti-slipping mechanism includes a polygonal engagement hole (22) on the tip side of the inner socket (2) and a large-diameter guide continuous to the hole. A hole (23) is opened, and a pin projecting member (26) is axially slidably provided in the guide hole (23). A part of the pin projecting member (26) penetrates into the polygonal engagement hole (22), and a peripheral groove (26a) is formed on the outer circumference. An engagement groove (33) is formed on the inner surface of the outer socket (3) at the rear of the inward flange (34) over the entire circumference. A radial through hole (24) is formed through the peripheral wall of the guide hole (23) of the inner socket (2), and an inner socket receding prevention pin (25) is provided in the through hole (24) so as to be retractable. There is. At the forward end of the inner socket (2), the receding prevention pin (25) is projected outward by the pin projecting member (26), and is fitted into the engaging groove (33) of the outer socket (3). ) Is prevented from retreating. In FIG. 10, the hitting pin (28) is slidably provided through the pin projecting member (26) and is urged by the spring (28a) in the projecting direction. The tapping pin (28) taps out the chip (91) after shearing from the inner socket (2). When the tip of the tapping pin (28) is pressed, the pin can be retracted independently. it can.

<Operation of Anti-Slipping Mechanism> When the inner socket (2) is fitted into the bolt tip (91) and the tightening machine (1) is pressed, the tip of the bolt tip (91) is knocked out and the pin (28) and the pin. The protruding member (26) is pushed backward against the spring (27). Retraction of the pin projecting member (26) allows the circumferential groove (26a) of the member to be recessed in the peripheral wall of the inner socket (2) corresponding to the position of the receding prevention pin (25). . In the above state, the nut (93) fits into the outer socket (3) and the inner socket (2) is pushed backward. As described above, since the lock for preventing the inner socket (2) from retracting is released, the inner socket (2) retracts and the nut engaging hole (30) of the outer socket (3) is opened to release the nut. Allow the fitting of (93). As mentioned above, the outer socket (3) will not be opened unless the bolt tip (91) is correctly inserted and pushed into the inner socket (2), and therefore the nut remains insufficiently fitted in the outer socket (3). Rotational drive is prevented.

<Replacement of Socket Unit> Loosen the screw (32) fixing the outer socket (3) to the outer socket holder (31), and pull out the outer socket (3). The inner socket (2) is locked to the outer socket (3) by the retracting pin (25) and is pulled out together with the outer socket (3). Insert another socket unit with the inner socket (2) set in the outer socket (3) in advance into the outer socket holder (31). At this time, if the ridges (21) on the outer periphery of the inner socket (2) and the groove (41) of the inner socket holder (4) are in phase, spline the inner socket (2) and the inner socket holder (4). When fitted, the inner socket (2) is allowed to move backward, the outer socket (3) is also correctly fitted in the outer socket holder (31), and the screw replacement is completed by tightening the screw (32). However, as described above, it is rare that the ridges (21) on the outer circumference of the inner socket (2) and the groove (41) of the inner socket holder (4) are in phase with each other, and in most cases, the inner socket ( The rear end (21a) of the ridge (21) of 2) hits the tip (41a) of the inner socket holder (4) to prevent the inner socket (2) from retracting, and the outer socket (3) to the proper position. It cannot be pushed.

Therefore, conventionally, when assembling a socket, the following two methods are adopted. One method is to separate the outer socket (3) and the inner socket (2), fit the inner socket (2) into the inner socket holder (4), and then project the pin with a shaft-like object such as a driver. The member (26) is pushed against the spring (27), and the outer socket (3) is fitted into the outer socket holder (31) while allowing the recession prevention pin (25) to be recessed. Push the outer socket (3) to the proper position, release the pressure on the pin projecting member (26) while holding the socket by hand, and move the pin projecting member (26) forward to prevent the receding prevention pin (25 ) Is projected in the radial direction and is engaged with the engaging groove (33) of the outer socket (3) to set both sockets. Fix the outer socket (3) to the outer socket holder (31) with screws (32). Another method is to prepare shear bolts (9) for each size of socket unit and use the shear bolts (9) as a jig. The inner socket (2) is assembled in the outer socket (3) in advance, and the outer socket (3) is fitted into the outer socket holder (31) in that state. When the ridge (21) of the inner socket (2) hits the tip (41a) of the inner socket holder (4), the tip () of the shear bolt (9) of the size corresponding to the inner socket (2). Insert 91) into the inner socket (2) and turn the shear bolt (9) to push the outer socket (3). When the ridges (21) of the inner socket (2) and the groove (41) of the inner socket holder (4) are in phase, the outer socket (3) and the inner socket (2) can be pushed in, The inner socket (2) is splined with the inner socket holder (4), and the outer socket (3) fits into the normal position. Screw the outer socket (3) onto the outer socket holder (31).

[0009]

[Problems to be solved by the present invention]

 The replacement socket unit is stored with the inner socket (2) assembled in the outer socket (3). As in the former case, this is temporarily separated and then reassembled on the tightening machine (1). Incorporation is troublesome and troublesome. When the socket unit is assembled using the shear bolt (9) as in the latter case, it is necessary to prepare a plurality of sizes of shear bolts (9) according to the size of the replacement socket unit. The present invention reveals a socket replacement tool that enables replacement of a plurality of sizes of socket units with one tool, including the work of screwing the outer socket.

[0010]

[Means for solving the problem]

 The socket exchanging tool of the present invention has an engaging piece (71) for screw engagement at the tip of the shaft body (7) and corresponds to the size of the inner socket (2) on the shaft body (7) according to the type. Then, polygonal parts (81), (62), (63) having different diagonal lengths are formed in a plurality of steps in order from the engagement piece (71) in the order of small size.

[0011]

[Action and effect]

 Insert the outer socket (3) into the outer socket holder (31) with the inner socket (2) assembled in the outer socket (3). When the protrusion (21) of the inner socket (2) hits the tip (41a) of the inner socket holder (4) and the backward movement of both sockets is prevented, the tool of the present invention is inserted into the inner socket (2). insert. Among the multi-stage polygonal parts (81) (62) (63) of the tool, the polygonal part of a size corresponding to the inner socket (2) engages with the inner socket (2). Push in the outer socket (3) while turning the tool. When the ridge (21) of the inner socket (2) and the groove (41) of the inner socket holder (4) are in phase, the outer socket (3) and the inner socket (2) can be pushed in, The socket (2) is splined with the inner socket holder (4), and the outer socket (3) fits into the normal position. With the outer socket (3) held in the correct position, pull out the tool, engage the engagement piece at the tool tip with the screw (32), and tighten the screw to attach the outer socket (3) to the outer socket holder. Fix at (31). Since the multiple-sized polygonal parts (81) (62) (63) are formed in one tool, it is not necessary to always prepare the multiple-sized shear bolts (9) as in the conventional case. Further, it is possible to eliminate the waste of reassembling the inner socket (2) set in the outer socket (3) and reassembling it on the tightening machine (1). Further, the screw for fixing the outer socket (3) can be tightened or loosened with a tool, and a separate screw tightening tool such as a screwdriver is not required, which is an excellent effect.

[0012]

【Example】

 1 to 6 show that a first polygonal portion (81) is provided slidably in an axial direction on a shaft body (7) protruding from a handle (51), and a second polygonal portion (81) is provided on the handle (51). The part (62) and the third polygonal part (63) are formed. A hole (52) is formed in the front end surface of the handle (51), and the tubular member (6) is fixed to the handle (51) by press fitting or the like into the hole (52). On the outer circumference of the tip of the tubular member (6), a hexagonal second polygonal portion (62) is provided, which is adjacent to the second polygonal portion (62) and is one size larger than the second polygonal portion (62). Three polygonal parts (63) are formed in phase. The shaft body (7) is provided by being slidably fitted in the hole (61) of the tubular member (6).

The base end of the shaft body (7) is an enlarged portion (72), and the enlarged portion (72) is fixed to the inner part of the tubular member (6) by press fitting or the like. The tip of the shaft body (7) projects from the tubular member (6) to form an engaging piece (71) for the screw head. Since the screw (32) for fixing the outer socket (3) to the outer socket holder (31) is generally a slotted screw, the engagement piece (71) has the same shape as the tip of the minus driver. However, if the screw (32) is a screw with a cross groove, the engaging piece (71) has the same shape as the tip of a Phillips screwdriver, and if the screw (32) has a hexagonal hole, the engaging piece (71) is a hexagon wrench. Same shape as. A long hole (73) is opened in the shaft body (7) in the axial direction.

A slide member (8) is slidably fitted to the shaft body (7), and a first polygonal portion smaller than the second polygonal portion (62) by one size is provided at the tip of the slide member (8). (81) is formed. The slide member (8) is orthogonal to the shaft center and penetrates the elongated hole (73) of the shaft body (7), and is fitted with a retaining pin (84) so that the slide member (8) and the shaft body ( It is urged in the pop-out direction by a spring (82) provided between the enlarged portion (72) and the enlarged portion (72). The urging force of the spring (82) is larger than the force of the spring (27) urging the pin projecting member (26) of the tightening machine (1).

As shown in FIG. 2, the first polygonal portion (81) of the slide member (8) is separated from the second polygonal portion (62) when the slide member (8) is not loaded. The engaging piece (71) projects from the slide member (8). As shown in FIG. 1, the distance between the first polygonal part (81) and the second polygonal part (62) is such that the first polygonal part (81) fits into the inner socket (2) of the minimum size. , The first polygonal portion (81), the second polygonal portion (62) contacts the end surface of the inner socket (2) with the pin protruding member (26) being pushed in by the first polygonal portion (81). Distance.

Then, with the inner socket (2) assembled in the outer socket (3), the outer socket (3) is fitted into the outer socket holder (31). When the protrusion (21) of the inner socket (2) hits the tip (41a) of the inner socket holder (4) to prevent both sockets from retracting, insert the tool of the present invention into the inner socket (2). To do. Among the multi-stage polygonal parts (81) (62) (63) of the tool, the polygonal part of a size corresponding to the inner socket (2) engages with the inner socket (2). If the socket size is the minimum size, as shown in FIG. 1, when the first polygonal part (81) fits into the inner socket (2), the pin projecting member (26) is pressed, and the first polygonal part (81) is pressed. ) Fits into the inner socket (2). As shown in FIG. 6, if the socket size is an intermediate size, the spring (82) is compressed and the second polygonal portion (62) fits into the inner socket (2) as shown in FIG. If the socket size is the maximum size, the spring (62) is further compressed to fit the third polygonal portion (63) into the inner socket (2).

As described above, while any one of the polygonal parts is fitted to the inner socket (2), the tool (5) is rotated and pressed against the tightening machine (1) side. When the protrusions (21) of the inner socket (2) and the groove (41) of the inner socket holder (4) are in phase, the outer socket (3) and the inner socket (2) can be pushed in, The socket (2) is splined with the inner socket holder (4), and the outer socket (3) is fitted to the proper position. With the outer socket (3) held in the correct position, pull out the tool, engage the engagement piece at the tool tip with the screw (32), and tighten the screw to attach the outer socket (3) to the outer socket holder. Fix at (31).

When the first polygonal part (81) for pressing the pin projecting member (26) is slidable with respect to the shaft body (7) like the tool of the embodiment, the inner socket (2) and The outer socket (3) can be set in the tightening machine (1) in a separated state. That is, first, the inner socket (2) is splined to the inner socket holder (4). Next, the outer socket (3) is fitted into the inner socket (2), and the socket replacement tool (5) is fitted into the inner socket (2). Press the socket replacement tool (5) while rotating it. The pin projecting member (26) is pushed in by the first polygonal portion (81) to release the anti-slipping, that is, the receding prevention pin (25) is recessed in the peripheral wall of the inner socket (2). This allows the outer socket (3) to be pushed in, and when the ridges (21) of the inner socket (2) and the groove (41) of the inner socket holder (4) are in phase, both sockets are in their normal positions. It is possible to fix the outer socket (3) with screws by retracting to the end.

FIG. 7 shows another embodiment in which the first polygonal part (81) is integrally formed on the shaft body (7), and the shaft body (7) itself is attached by a spring (82) in the protruding direction. I am energetic. An elongated hole (64) is opened in the axial direction in the third polygonal portion (63) on the handle (51) side, and a pin (74) protruding from the shaft body (7) can slide in the elongated hole. It is fitted to prevent the shaft (7) from coming off. The method of use is the same as that of the tool shown in FIG. In FIG. 8, the shaft body (7), the first polygonal portion (81), the second polygonal portion (62) and the third polygonal portion (63) are integrated, and there is no sliding portion. The tool shown in FIG. 8 can be used only when the socket unit in which the inner socket (2) is assembled in the outer socket (3) is attached to the tightening machine (1). As I did.

Since the socket replacement tool (5) of the present invention has a plurality of sizes of polygonal parts (81) (62) (63) formed in one tool, it always has a plurality of sizes of shear bolts (9). ) Need not be prepared. Also, the inner socket (2) set in the outer socket (3) can be constantly removed to eliminate the waste of reassembling on the tightening machine (1). Furthermore, the screw for fixing the outer socket (3) can be tightened or loosened with a tool, and a screw tightening tool such as a separate screwdriver is not required, which is an excellent effect. The present invention is not limited to the configuration of the above embodiment, and various modifications can be made within the scope of the claims for utility model registration.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a usage state.

FIG. 2 is a front view of a socket replacement tool.

FIG. 3 is a right side view of the socket replacement tool.

FIG. 4 is an exploded view of a socket replacement tool.

FIG. 5 is a cross-sectional view showing a state where a socket unit that is one size larger is assembled.

FIG. 6 is a cross-sectional view showing a state where a socket unit that is two sizes larger is assembled.

FIG. 7 is a front view of a tool showing a part of another embodiment in section.

FIG. 8 is a front view of a tool of another embodiment.

FIG. 9 is a schematic explanatory view of a tightening machine.

FIG. 10 is a sectional view of a socket mounting portion.

FIG. 11 is a sectional view of an inner socket holder.

[Explanation of symbols]

 (1) Tightening machine (2) Inner socket (3) Outer socket (31) Outer socket holder (4) Inner socket holder (62) Second polygon part (63) Third polygon part (7) Shaft pair ( 8) Slide member (81) First polygonal part

Claims (2)

[Scope of utility model registration request] 1. An outer socket holder (31) and an inner socket holder (4) are concentrically and rotatably arranged at the tip of a case (11), and the outer socket (3) is screwed to the outer socket holder (31). Fix and fit the inner socket (2) to the inner socket holder (4) by spline coupling so that it can slide in the axial direction.
The inner socket (2) is attached to the shearing tip (91) of (9), and the outer socket is attached to the nut (93) screwed to the shear bolt.
(3) is engaged, and the inner socket (2) and the outer socket (3) are subjected to tightening forces in mutually opposite directions, so that the tip (9
A tool used to replace the socket of a tightening machine that shears 1) and tightens bolts and nuts with a constant torque, and includes an engaging piece (71) for screw engagement at the tip of the shaft (7). Has a shaft
(7) Polygonal parts (81) (62) (63) with different diagonal lengths correspond to the size of the inner socket (2) for each type, and the engaging pieces (7
Tool for socket replacement of bolt tightening machine, which is formed in multiple steps from 1) in order of small size. 2. The second and subsequent polygonal parts (62) (63) are integrated with the handle (51), and the minimum size polygonal part (81) is axially slidable and has a spring (82). The tool according to claim 1, wherein the tool is biased in a popping-out direction by the.