JPH059809U - Check device - Google Patents

Abstract

(57) [Summary] [Purpose] To enable chucking without damaging the work. [Structure] A chuck body 14 is arranged in a holder 15, and a tip portion of the chuck body 14 is inserted into an insertion hole 20 for a work W.
In the case where the chuck body 14 is inserted and held, the chuck body 14 is made of an elastic material and has an outer diameter that allows the chuck body 14 to be inserted into the insertion hole 20 in a natural state. It is composed of a pressure bolt 18 for applying force. As a result, the work W is the cylinder 1 in the natural state.
After being inserted into 7, the compression bolt 18 applies a compressive force in the axial direction to expand and deform the insertion hole 2
The work W is held by being pressed against the 0 hole wall.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for chucking a work to be polished in, for example, a barrel polishing device.

[0002]

[Prior Art]

 For example, when polishing the surface of a golf iron club head (workpiece), a barrel polishing device of a type called a rotary dry barrel (see FIG. 2) is often used. As shown in FIGS. 5 and 6, a holder 30 for mounting a work is provided inside the apparatus. The workpieces W are held by the chuck bodies 32 that are attached to the holder 30 in a large number. Mounting holes 31 are penetrated through the holder 30 at appropriate intervals, and a holding shaft 33 constituting a chuck body 32 is inserted and mounted. The holding shaft 33 is a hollow shaft having a shaft hole 34. The lower portion of the flange 35 shown in the drawing is inserted into the mounting hole 31, and the portion of the holder 30 projecting downward is tightened with a nut 36 to fix the whole. ing. In addition, a split groove 37 is cut in a cross shape along the axial direction on the upper side of the flange 35 and is divided into four. The portion where the split groove 37 is cut is forcibly expanded by the insert pin 38 that is inserted into the shaft hole 34. That is, the shaft end of the insert pin 38 is integrally formed with a hexagonal nut-shaped head portion 39, and the portion near the head portion 36 becomes a screw shaft 41 that is screwed into the screw portion 40 of the shaft hole 34. ing.

That is, when holding the work W, the insert pin 38 is loosened in advance, the tip end side of the holding shaft 33 is inserted into the insertion hole 42 of the work W to temporarily attach the work W, and then the insert pin 38 is inserted. By screwing in 38, the tip side of the holding shaft 33 is expanded by the split groove 37. As a result, each divided portion of the holding shaft 33 is pressed against the hole wall of the insertion hole 42, and thus the work W is held.

Although the above-mentioned chuck device is of a type that thrusts into and holds the inside of the work W, there is also known a type of such that the work is narrowed and fitted from the outside (for example, the actual opening). 63-97451).

[0005]

[Problems to be solved by the device]

 However, even if the work is held from the inside or the outside, the conventional work holds the metal in contact with each other, so that the contact portion may be damaged and the commercial value may be significantly impaired.

Further, in the type shown in FIGS. 5 and 6, when a portion where each divided portion of the holding shaft 33 abuts on the hole wall of the insertion hole 42 of the work W is enlarged, as shown in FIG. It is in point contact. Therefore, sufficient holding force cannot be obtained, and rattling easily occurs even when the work W is held. Further, even if the split groove 37 is provided to forcefully expand the holding shaft 33, since the holding shaft 33 is made of a metal material, the degree of expansion of the diameter cannot be expected to be large. Therefore, it is not possible to effectively absorb variations in the hole diameter of the insertion hole 42, and it is not possible to widely deal with works having different hole diameters. If the insert pin 38 is forcibly screwed in to handle it, the holding shaft 33 will be cracked. Furthermore, when the insertion hole 42 of the work W is a screw hole, there is a concern that the screw thread may be crushed.

Furthermore, as a problem peculiar to the dry barrel polishing apparatus, polishing powder enters the insertion hole 42, and an internal cleaning operation is required after the polishing operation, which increases the number of working steps. One of the reasons is that the work efficiency decreases due to.

In view of these problems, an object of the present invention is to provide a chuck device that realizes a good holding state for a work.

[0009]

[Means for Solving the Problems]

 The structure of the present invention for achieving the above object is a chuck device of a type in which the tip of the chuck body disposed in the holder is inserted into an insertion hole formed in the workpiece to hold the workpiece. Is a holding body made of an elastic material with an outer diameter that can be inserted into the insertion hole in its natural state, and an expansion enough to apply a compressive force in the axial direction to this holding body. It is characterized in that it comprises a pressurizing means for performing a radial deformation.

[0010]

[Action]

 In the above configuration, when holding the work, first, the holding body in a reduced diameter state is inserted into the insertion hole of the work. In this state, when the holder is axially compressed by the pressing means, the holder is elastically deformed in the radial expansion direction and pressed against the hole wall of the insertion hole, so that the work is held by the elastic force of the holder. It

[0011]

[Effect of the device]

 The effects of the present invention are as follows. Since the work is held by the holder made of an elastic material, damage to the contact portion with the holder is avoided. Also, since the side surface of the holder contacts the hole wall of the insertion hole over a certain length range, that is, it makes surface contact unlike the conventional method, so sufficient holding force for the work is secured and the work is stabilized. Hold in the state. Further, due to the high degree of close contact between the holder and the insertion hole, it is possible to prevent dust and the like from entering the insertion hole at the time of work, which can improve the work efficiency by eliminating the cleaning process.

[0012]

【Example】

 Hereinafter, embodiments embodying the present invention will be described in detail with reference to the drawings. FIG. 2 shows a schematic structure of a barrel polishing device to which the chuck device of the present invention is applied. As shown in FIG. 3 and FIG. 3, the barrel tank has a double structure of an outer drum 1 having an octagonal peripheral surface and an inner drum 2 formed in a cylindrical shape. The space thus partitioned is a polishing space 4 into which an abrasive 3 such as a polishing stone is put. The drums 1 and 2 have a common rotation support shaft 5, and the rotation support shaft 5 is rotatably supported via a pair of left and right bearings 6 and 7. A sprocket 8 loosely fitted to the rotation support shaft 5 is fixed to the outer side surface of the outer drum 1, and a chain 10 is stretched between the sprocket 8 and an outer drum drive motor 9 that can rotate in the normal and reverse directions. The outer drum 1 is rotatable in both forward and reverse directions. On the other hand, the sprocket 11 is also fitted to the shaft end of the rotary support shaft 5, and the chain 13 is hung between the inner drum drive motor 12 capable of rotating in the forward and reverse directions in the same manner as described above. The inner drum 2 is rotatable in both forward and reverse directions.

However, although the outer drum 1 and the inner drum 2 are set to rotate in opposite directions in this embodiment, the driving conditions of the both drums 1 and 2 are not directly related to the gist of the present invention. Various conditions can be set, for example, changing the rotation direction at regular intervals. Furthermore, as in this embodiment, the drums 1 and 2 may not be driven independently of each other, but may be driven by a single motor.

Further, as shown in FIG. 3, on the outer peripheral surface of the inner drum 2, holders 15 for mounting the chuck body 14 are provided at eight radial positions, each of which has substantially the entire length of the inner drum 2. Are mounted along the axial direction. A large number of mounting holes 16 pass through each holder 15 at equal intervals, and the chuck body 14 is attached to each of them.

The chuck body 14 is composed of a holding body 17 and a pressure bolt 18 as a pressing means for the holding body 17. The holding body 17 is formed into a cylindrical shape by an elastic material such as a rubber material or a urethane resin material, and a shaft hole 19 into which a pressure bolt 18 is loosely inserted penetrates along the shaft center. Further, the holding body 17 is always formed to have an outer diameter that can be inserted into the insertion hole 20 of the work W (state shown by an imaginary line in FIG. 1), but a compression force is applied from the axial direction by the pressurizing bolt 18. In the case of being deformed, it is bulged and deformed in the radial direction (state shown by a solid line in FIG. 1). The degree of this bulge is such that at least the outer wall of the holder 17 is strongly pressed against the hole wall of the insertion hole 20 to securely hold the work W.

The pressurizing bolt 18 is formed of a head portion 18 a that abuts the lower surface of the holding body 17 and a screw shaft 18 b that is inserted into the shaft hole 19 of the holding body 17. The outer diameter of the head portion 18 a is The outer diameter of the holder 17 is set to be approximately the same as that of the holder 17 so that a compressive force can be applied to almost the entire lower surface of the holder 17. The screw shaft 18b is formed to have a length that penetrates the mounting hole 16 of the holder 15 and projects to the upper surface of the holder 15, and the nut 21 is fastened to the projecting portion to hold the chuck body 14. Then, the pressure bolt 18 is pulled up as the nut 21 is tightened, and along with this, a compressive force can be applied to the holding body 17.

When polishing the work W according to the present embodiment configured as described above, first, the polishing agent 3 is introduced to an appropriate depth of the polishing space 4. On the other hand, the work W is attached to each chuck body 14. The mounting operation is performed by passing the holder 17 through the insertion hole 20 of the work W and tightening the nut 21. As a result, the holding body 17 expands in the radial direction by receiving the compressive force from the pressure bolt 18, and the work W is held by being pressed against the hole wall of the insertion hole 20. After this work is performed for each chuck device, both drive motors 9 and 12 are driven to rotate the inner and outer drums 1 and 2 in opposite directions. Is done.

In this embodiment, since the work W is held by the holding body 17 made of a rubber material, the inside of the insertion hole 20 is scratched or the ridge of the insertion hole 20 is crushed. Is avoided in advance. Further, since the outer peripheral surface of the holding body 17 in the portion inserted into the insertion hole 20 is in close contact with the hole wall, that is, the pressing force (holding force) against the work W over a wide range. Therefore, the workpiece W is securely chucked and the posture during polishing is made stable without rattling. Further, since the adhesiveness to the insertion hole 20 is good, it is possible to regulate the situation where the polishing powder enters the insertion hole 20. Therefore, the cleaning work inside the insertion hole 20 is not required after the polishing work, and the work efficiency is improved.

In this example, the one applied to the dry barrel polishing apparatus is exemplified, but the one applied to the wet type is also possible. When it is applied to the wet type, if the work is held by bringing metals into contact with each other as in the conventional case, there is a problem that the rust generated in the chuck device adheres to the work. The points can also be eliminated.

Since the work W is held by the pulling operation of the pressure bolt 18 in this example, it is particularly effective for the work W in which the insertion hole 20 is not penetrated as in the present example. is there.

Further, in the case where the work W is held by the diameter expansion deformation by elasticity like this example, the diameter expansion amount is made larger than that of the conventional type in which the split groove is provided and the divided piece is expanded. be able to. Therefore, there is an effect that it is possible to widely deal with variations in the hole diameters of the insertion holes 20 or workpieces W having slightly different diameters.

FIG. 4 shows a second embodiment of the present invention, and the second embodiment is a modification of the pressing means.

In FIG. 4, a nut 21 is tightened near a shaft end of the pressure bolt 18 via a spring seat 22, and a spring 23 is interposed between the spring seat 22 and the holder 15. There is. The spring 23 urges the pressure bolt 18 in a direction to pull it upward, and the head portion 18a of the pressure bolt 18 exerts a compressive force on the holding body 17 by this urging force. The pressure bolt 18 is always forcibly pushed down by the pressing lever 24 provided on the holder 15. The holding lever 24 is rotatably attached to the upper surface of the holder 15 by a pin 25, and presses the shaft end (upper end) of the pressure bolt 18 in the middle thereof. Further, on the upper surface of the holder 15, a hook member 26 that rotatably holds the operation end side of the pressing lever 24 is rotatably provided.

In the second embodiment constructed as described above, the holding lever 24 is normally hooked by the hook member 26, and the lever 24 holds the pressure bolt 18 in a depressed state. .. Therefore, the spring 23 is in a compressed state, and the pressure bolt 18 is pushed down to release the holding body 17. Therefore, as shown by the imaginary line in FIG. 4, the holding body 17 is in a reduced diameter state in which it can be loosely inserted into the insertion hole 20 of the work W, and the work W can be attached to the holding body 17 as it is.

After that, if the hook member 26 is released and the pressing lever 24 is lifted, the pressurizing bolt 8 is pulled up by the spring 23, and a compression force is applied to the holding body 17. As a result, the holding body 17 expands in diameter and holds the work W.

In the second embodiment, in addition to the effect of the first embodiment, since the work W can be held by a one-touch operation by lever operation, the chucking work of the work W can be efficiently performed. The effect is obtained.

The present invention can be widely applied to chuck devices in general, and should not be limited to barrel polishing devices.

[Brief description of drawings]

FIG. 1 is a sectional view showing a holding state of a work.

FIG. 2 is a front sectional view showing an outline of the entire barrel polishing apparatus.

FIG. 3 is a sectional view of a barrel polishing tank.

FIG. 4 is a sectional view of a chuck device according to a second embodiment.

FIG. 5 is an exploded perspective view of a conventional chuck device.

FIG. 6 is a cross-sectional view showing a mounted state of a work.

FIG. 7 is an enlarged sectional view showing a holding portion of the work.

[Explanation of symbols]

 14 ... Chuck body 15 ... Holder 17 ... Holding body 18 ... Pressurizing bolt (pressurizing means) 20 ... Insert hole W ... Work

Claims (1)

[Claims for utility model registration] 1. A chuck device of a type in which a tip of a chuck body arranged in a holder is inserted into an insertion hole formed in a workpiece to hold the workpiece, In its natural state, a holding body made of an elastic material with an outer diameter that can be inserted into the insertion hole, and a diameter expansion deformation that applies a compressive force from the axial direction to this holding body to hold the work A chuck device comprising: a pressurizing unit for performing