JP2501004Y2 - Attachment / detachment device for axial tightening member of bolt tightening device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention is an improvement that enables automatic replacement of sockets, bits, etc. of a bolt tightening device, and automatic sockets, bits, etc., from this tightening device. The present invention relates to a removable attachment / detachment device.

[Prior Art] Conventionally, Japanese Utility Model Publication No. 60-15655 and Japanese Utility Model Publication No. 62-141473 have been disclosed as mounting / demounting devices for sockets, bits, and the like, which are tightening members of bolt tightening devices. This kind of technology
A groove is provided on the tool body (tightening device body) side, a ball is fitted into this groove, the ball is engaged with the outer periphery of the holding portion of the bit and socket, and the bit and socket are fixed to the body side.
The engagement is released via the ball, and the bit and socket are attached and detached.

[Problems to be Solved by the Invention] In the above-mentioned conventional technique, it is necessary to use a bit band having a strong spring pressure in order to firmly hold the ball at the time of attaching and detaching the bit and the socket. It is difficult to insert and remove the bit and socket by rotating the sleeve and inserting and removing the bit and socket, and it is difficult to automatically replace the bit and socket. There is a problem such as.

The present invention has been made to solve the above problems, and an object of the present invention is to facilitate attachment and detachment of sockets and bits in a bolt tightening device while firmly and securely holding them, and The purpose of the present invention is to provide an attachment / detachment device that can automatically attach / detach a socket or a bit to / from a bolt tightening device with a simple device or mechanism.

[Means for Solving the Problems] A means for solving the above problems is a bit for performing screw tightening, or a tightening device including a holding hole into which a holding portion of a shaft-like tightening member such as a socket is fitted. It is composed of a main shaft and a chuck that holds a holding portion of a shaft-shaped tightening member that is fitted into a holding hole of the main shaft. The chuck is provided on the outer periphery of the main shaft and is elastically pressed in a direction to close the outer surface of the base with a spring. , A plurality of engaging portions that project outward in the radial direction and that are provided on the inner surface of the base portion with engaging portions that engage with locking grooves provided on the outer periphery of the retaining portion of the shaft-shaped tightening member fitted into the retaining hole A mounting / demounting device for the shaft-shaped tightening member of a bolt tightening device made of a claw piece, wherein the device-mounting / dismounting device is a cylindrical holder sleeve for inserting and holding the entire shaft-shaped tightening member, and the holder sleeve. It is provided on the tip of the chuck and fits with the above-mentioned chuck to open the jaws of the chuck. It consists of a chuck opening-sleeve performing, and said opening-sleeve and the holder sleeve is the wearing device axial fastening member of one of the bolt fastening apparatus configured axially slidably.

[Operation of the above means] According to the above means, the socket, the bit, etc. are fitted to the main shaft, and are engaged and held between the plurality of claw pieces constituting the chuck and the grooves on the outer circumference of the claw pieces. Is strong and reliable, and the tip of the claw piece projects outward, so the tip of the claw piece can be contracted and closed by fitting the opening / closing sleeve of the loading / unloading device. When the engagement by the claw pieces is released, on the other hand, the socket or bit is stored in the holder sleeve, and on the other hand, the main shaft of the tightening device is inserted into the attachment / detachment device storing the socket or bit, and the opening sleeve is moved relatively. , The tip restraint of the claw piece is released, and the claw piece base is contracted and closed by the elastic force, so that the socket and the bit are automatically engaged and held.

[Embodiment] Next, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a sectional view of a side surface of the tightening portion of the bolt tightening device, which is cut away, FIG. Fig. 4 is a front view of the loading / unloading device, Fig. 5 shows the socket detached from the loading / unloading device,
FIG. 4 is a vertical cross-sectional side view showing a state in which a socket is handed over to a tightening device and set and fixed.

In FIG. 1, reference numeral 1 is a tightening device, and the drawing shows an enlarged front portion 2. A rotating drive shaft 3 projects from the front portion 2 and a base ring 4 is attached to the end surface of the front portion 2. A cylindrical guide holder 5 is supported via the bearing, and a rotation transmission shaft 7 is supported in the guide holder 5 via a bearing 6 so as to rotate.

The transmission shaft 7 is configured such that the tip portion of the drive shaft 3 described above is fitted in a hole 7-1 provided in the base portion, is coupled by a pin or the like, and is rotated by the rotation of the drive shaft 3. . A disk-shaped rear spring receiving plate 8 is fixedly provided around the middle portion of the transmission shaft 7, and a guide portion 7 having a small diameter is provided around the middle portion or the front portion of the transmission shaft 7.
-2 is provided for a predetermined length, and a cylindrical portion 9-1 of a cylindrical holder 9 that is a holding member of a socket that constitutes a bolt tightening member is slidably fitted to the outer periphery of the guide portion 7-2. .

The tubular portion 10-1 of the front spring receiver 10 is fitted and fixed to the periphery of the rear half of the tubular portion 9-1 of the chuck holder 9, and the tubular portion 9 of the holder 9 is fixed.
A long hole 9-2 is provided in a part of -1 in the axial direction, and a projecting end of a retaining pin 7-3 fixed to the tip of the transmission shaft 7 is engaged with the hole 9-2 so that the holder 9 and the front spring receiver 10 are Guarantees linear sliding in the axial direction. A shock absorbing spring, for example, a coil spring 11 is provided between the front and rear spring receivers 10 and 8 in a compressed manner.

The tubular front half 9-3 of the holder 9 is formed in a rectangular tubular shape, in the embodiment a rectangular tubular shape, and this portion projects forward from the front spring receiver 10 in the axial direction, and the latter half of the front half 9-3. 18 around
A groove 9-4 is provided at a distance of 0 °. The inner diameter of the cylinder front half 9-3 is such that the front 9-5 has a large diameter, the rear 9-6 has a small diameter, and the rear half of the front half 9-3 is at the rear of the groove 9-4. Is provided with a slit-shaped hole 9-7 having a length in the axial direction, and the holes 9-7 are provided 180 ° apart from each other.

The claw pieces 12, 12 are provided so that the middle part to the rear part of the groove part 9-4 may be applied. The claw pieces 12 and 12 are pivotally attached by pins 15 to support pieces 14 and 14 which are erected at the middle portion around the front half of the holder 9 with a space of 180 ° therebetween. Each of the claw pieces 12 is provided with an engaging portion 12-1 projecting inward at the rear portion thereof, and a concave groove 12-at the outer edge thereof.
2 is provided, on the other hand, the front portion 12-3 has a chevron shape and protrudes outward, the inner edge portion 12-4 of the front portion 12-3 is flat, and in the locked state, the outer periphery of the front half portion 9-3 is predetermined. Holds the clearance of.

As shown in the figure, a C-ring spring 16, for example, is wound between the upper and lower claw pieces 12, 12 on the rear outer side of the recessed grooves 12-2, 12-2. The rear portions of 12 are elastically pressed toward each other to elastically project the engaging portions 12-1 and 12-1 from the groove portion 9-7 into the rear portion of the inner diameter rear portion 9-4.

 The chuck 13 is formed by the claw pieces 12, 12.

The holder 9 and the chuck 13 hold the shaft-shaped member for bolting, that is, the socket 17 in the embodiment. Socket 17
Has a long shaft-like shape, an engaging recessed portion 17-1 for fitting with a bolt head is provided at a front end thereof, and a rear end of the long shaft portion 17-2 has a rectangular tubular shape as described above of a front half portion of the bolt 9. Fitting portions 17-3 and 17-4 having a square cross section that fit with the inner diameter portions 9-5 and 9-6 are formed. The front fitting part 17-3 has a shoulder 17 at the rear end thereof.
-5 comes into contact with the shoulder portion 9-8 of the inner diameter portion on the holder side, and further progress in the axial direction is restricted, and positioning is performed.

The rear end portion 17-6 of the small-diameter fitting portion 17-4 is sharply formed rearward, and the engaging groove 1 having a concave shape is formed 180 ° apart on the front side of the rear end portion 17-6.
Provide 7-7 respectively.

In the above, the socket 17 is inserted from the tip of the holder 9. Since the rear end portion 17-6 of the socket 17 is first inserted and is sharp, the socket 17 hits the engaging portion 12-1 of the claw piece 12, opens this against the elastic force, and enters the engaging groove 17-7. The engaging portion 12-1 of the claw piece 12 is engaged, and this engaged state is maintained by the winding elastic pressure of the spring 16. Therefore, the shoulder portion of the engaging portion 12-1 and the locking groove 17
With the engagement of -7, the socket 17 is prevented from being pulled out and moved in the axial direction. On the other hand, as described above, the abutment of the shoulder portions 17-5 and 9-8 enables the axial positioning and holding in the inner direction. Made and socket
Since the fitting of 17 and the holder 9 is a square body and a square hole, the rotation directions are integrated.

The locked and held state of the socket 17 by the holder 9 and the chuck 13 is shown in FIG.

Next, the attachment / detachment device for the socket 17 of the bolt tightening device will be described. FIG. 3 shows this and the diagram shows a state in which the socket can be removed.

The attachment / detachment device 20 is composed of an opening sleeve 22 fixedly provided on the front end of the base 21, and a long cylindrical holder sleeve 23 for accommodating the socket 17. The opening sleeve 22 has a taper guide portion 22-2 that gradually expands radially outward at the tip of the inner diameter portion 22-1.
The small diameter portion 23-1 of the middle portion or the front portion of the holder sleeve 23 is slidably fitted to the inner diameter portion 22-1 having a constant diameter in the axial direction.

The holder sleeve 23 has a large diameter in the rear half 23-2, and a lid plate 23-3 that closes the rear end is fixed to the rod of the cylinder 24 fixed on the base 21.
It is connected to 24-1. Therefore, the cylinder 24 is driven to move back and forth in the axial direction, while the opening sleeve 22 is fixed, and the opening sleeve is attached to the boundary shoulder portion 23-4 of the large and small diameter portions 23-1 and 23-2 of the holder sleeve 23. The holder sleeve 23 can slide until the rear end portion 22-3 of the vehicle 22 collides, and L in FIG. 3 is the sliding range.

In the holder sleeve 23, a space 25 for loosely holding the socket is formed as a space long in the axial direction.
The socket is provided with a socket guide member 26 in which a hole is made in the center of a sheet material such as rubber, and slits are radially formed.
Further, a socket head guide member 27 formed of thick rubber or the like is provided in front of the cover plate 23-3 at the final end.

Next, attachment / detachment of the socket 17 by the attachment / detachment device 20 will be described.

The fastening device 1 or the attachment / detachment device 20 is exposed to the attachment / detachment station. The attachment / detachment device 20 is set in the socket detached state in FIG. Therefore, the opening sleeve 23 is in the retracted position, and the distance L described above is open. For example,
The tightening device 1 is advanced in the axial direction to insert the socket 17 into the space 25 inside the holder sleeve 23 from the tip of the opening sleeve 22. The front end of the socket 17 expands the guide member 26 and enters the space 25, and the socket head is fitted and held in the socket head guide member 27 at the final end.

On the other hand, when the socket 17 enters the space 25, the claw pieces 12, 12 forming the chuck 13 reach the opening sleeve 22, and the outer edge of the jaw piece 12 has a chevron shape, and the opening sleeve 22.
Since the tip of the inner diameter portion 22-1 of the is tapered,
First, the tip of the outer edge of the tip 12-3 of the claw piece 12 is the open sleeve.
The tip portion of the claw piece 12 comes into contact with the tip taper guide portion 22-2 of 22 and progresses in the axial direction by the mutual guide actions of the tapers.
The tip portion of 12-3 contracts until it contacts the inner diameter portion 22-1.
As a result, the engaging portion 12-1 at the rear portion of the claw piece 12 is resisted against the spring 16.
Expands outward with the pin 15 as a fulcrum, and the engaging portion 12-1 is disengaged from the locking groove 17-7 of the socket 17.

As a result, the socket 17 becomes detachable from the holder 9, and the socket 17 is retained and stored in the holder sleeve 22 by moving the fastening device 1 in the axially disengaging direction. In this state, the holder 9 and the claw piece
The chuck 13 composed of 12 and the like can be removed. This is shown in FIG.

By the way, as shown in FIG. 4, for example, two attachment / detachment devices 20 are arranged side by side, and two types of sockets are stored in advance. By doing so, the socket can be detached by one device, and the socket previously stored and held in the other adjacent device can be set so as to face the above-described bare tightening device.

For example, as described above, the socket 17 is removed by one of the attachment / detachment devices A shown in FIG. 4, the tightening device is disengaged, and the adjacent attachment / detachment device B faces the tightening device. The socket 17 has a rear base portion projecting from the front end of the holder sleeve 23, is accommodated and held, and is fitted into the inner diameter portion of the holder 9 of the tightening device 1.

In this state, the claw piece 12 is released as shown in FIG. 3, so that the rear portion of the socket 17 is fitted into the inner diameter portion,
The state is similar to that shown in the figure. After that, the rod 24 of the cylinder 24−
1 to move the holder sleeve 23 into the shoulder 23-
4 moves forward until it comes into contact with the rear end portion 22-3 of the opening sleeve 22. On the other hand, since the outer opening sleeve 22 does not move, the holder 9 and the claw piece 12 that fit and hold the socket 17 by the backward movement of the tightening device 1 retracts, and the claw piece 12 causes the inner diameter of the tip end of the opening sleeve 22. At the moment when it is detached from the part, the rear part of the claw piece is contracted and closed by the winding elastic pressure of the spring 16, and the engaging part 12-1 is engaged with the engaging groove 17-7 of the socket 17.
Will be engaged. This is shown in FIG.

As described above, by simply inserting the socket 17 held by the tightening device 1 from the tip of the mounting / demounting device 20, the chuck is removed,
Moreover, the socket 17 can be stored and held, and
The chuck can be automatically set, engaged, and held simply by inserting the tightening device into the mounting / removing device, and therefore, the mounting / dismounting of the socket to / from the tightening device can be automated. Then, opening and closing the chuck can be done by simple insertion,
Therefore, with a simple structure, it is possible to automatically attach and detach the socket while ensuring reliable operation and reliability.

Although the socket has been described in the embodiment, it can be similarly applied to the bit.

[Effects of the Invention] As is clear from the above, according to the present invention, the bolt tightening device is such that the base (rear part) of the shaft-shaped tightening member, that is, the socket or the like is fitted to the holding part, and the claw pieces are fitted by the fitting. The engaging portion is engaged with and retained in the locking groove of the socket, and the claw piece is elastically biased in the closing direction by the spring, so that the socket and the like can be firmly and reliably retained.

Since the socket of the tightening device is engaged and held by utilizing the elastic force of the claw piece in the closing direction, the engagement of the rear part of the claw piece is released when the front part of the claw piece is closed. When attaching / detaching, it suffices to insert and hold the socket and perform inward contraction / closing movement of the tip of the claw piece.Axial relative movement of the sleeve and combination of sleeves of different sizes can be used. Since the operation can be configured with a simple structure and the socket is fitted with the holding portion, automation can be easily performed, and even when automated, a reliable operation and a highly reliable device can be obtained. As described above, there are great advantages such as cost advantages.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a sectional view of a half side surface of a tightening portion of a bolt tightening device, and FIG. 2 is a front view of the same taken along line 2-2 of FIG. Fig. 3 is a vertical sectional side view showing a state in which the socket portion is fitted and inserted into the loading / unloading device so that the socket can be removed, Fig. 4 is a front view of the loading / unloading device, and Fig. 5 is a state in which the socket is released from the loading / unloading device. FIG. 3 is a vertical cross-sectional side view showing a state in which a socket is handed over to a tightening device and set and fixed. In the drawing, 1 is a tightening device, 9 is a holding portion, 12 is a claw piece, and 12-1.
Is an engaging portion of the same, 12-3 is a tip portion thereof, 13 is a chuck,
16 is a spring for elastically pressing the claw piece, 17 is a socket as a shaft-like tightening member, 17-7 is a locking groove, 20 is a mounting / removing device, 22 is an opening sleeve, 23 is a holder sleeve, and 24 is one sleeve. It is a sliding cylinder.

Claims (1)

(57) [Scope of utility model registration request] 1. A main shaft of a tightening device having a holding hole into which a holding portion of a shaft-shaped tightening member such as a bit for tightening a screw or a socket is fitted, and a shaft shape fitted into the holding hole of the main shaft. A chuck for holding the holding portion of the tightening member, wherein the chuck is provided on the outer periphery of the main shaft, is elastically pressed in a direction to close the outer surface of the base with a spring, the tip portion projects radially outward, and on the inner surface of the base portion, The shaft-shaped tightening member of a bolt tightening device including a plurality of claw pieces provided with engaging portions that engage with locking grooves provided on the outer periphery of the holding portion of the shaft-shaped tightening member fitted in the holding hole. The attachment / detachment device according to claim 1, wherein the attachment / detachment device is provided with a cylindrical holder sleeve into which the entire shaft-like tightening member is fitted and held, and which is provided around the front portion of the holder sleeve and fitted with the chuck described above. A chuck opening sleeve for opening the claw pieces of the chuck. The sleeve and the opening-sleeve, one of which constitutes axially slidably, it the wearing device axial fastening members bolts clamping device according to claim.