JP3513680B2 - Holder stand - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holder for mounting a tool on a main spindle of a machine tool, and to stably mount the tool on the holder. It relates to a stand used for holding. 2. Description of the Related Art The holder is provided with a tool mounting portion at one end of a main body, and an insertion portion for insertion into a mounting hole provided on the main shaft at the other end. Structure.
As a stand for supporting such a holder, a hole for fitting the insertion portion is provided on the base, and around the opening of the hole in the base, a contact surface provided at one end of the main body is provided. There is a stand with a seat for sitting. By using such a stand, the holder can be stably supported in an immovable manner, and the work of mounting a tool on the mounting portion can be performed very easily. [0003] Recently, for the purpose of shortening the time required for exchanging tools with respect to the main spindle of a machine tool, reducing the weight of tool holders, and reducing the material cost of tool holders, There has been provided a holder in which the projecting dimension of the insertion portion is shortened (for example, see Japanese Patent Application Laid-Open No. 2-503768). However, when such a holder is supported by the above-described stand and a tool is mounted on the mounting portion of the holder, when a large force is applied to the mounting portion to strongly tighten the mounting portion, first, Since the dimensions of the insertion part are short,
Due to the large force, the insertion portion unexpectedly comes out of the hole, and not only cannot the tool be properly mounted on the mounting portion, but also, second, the insertion portion comes off the hole,
Third, an accident may occur in which the holder falls on the hands and feet of the worker, causing injury to the worker, and thirdly, the holder may fall on the floor and damage the holder. There was a problem. [0004] The holder stand of the present invention is provided to solve the above-mentioned problems (technical problems) of the prior art. A first object is to mount a tool on a tool mounting portion of a holder by enabling the holder to be immovably supported even when a projecting dimension of an insertion portion of the holder is short. Is to be performed easily. The second object is to prevent the holder from dropping during the mounting work of the tool, and to injure the worker due to the drop of the holder on the hands and feet of the worker and to prevent the holder from falling on the floor. An object of the present invention is to prevent the holder from being damaged due to the fall of the holder. Other objects and advantages will become more readily apparent from the drawings and the following description associated therewith. The holder stand of the present invention has a tool mounting portion at one end of a main body, and is inserted into a mounting hole provided on a main shaft of a machine tool at the other end. And a contact surface between the mounting portion and the insertion portion for contacting an end surface of a main shaft of the machine tool. Further, the insertion portion is provided on the main shaft. A fitting provided with a fitting recess for fitting a driving piece for rotational drive and a fitting provided on an inner inner wall for engaging a clamp claw of a holding device retaining clamp device provided on the main shaft. A holder for holding a holder having a mating part, wherein a base C of the holder stand has a hole 14 for inserting an insertion portion of the holder.
In the holder stand provided with a seat 17 for seating the abutment surface of the holder around the opening of the hole 14, in the hole 14, the rotation of the insertion portion is prevented. A stopper 16 adapted to be fitted to the fitting recess, and to engage with an engaging portion provided on the inner wall of the insertion portion inserted into the hole 14. And an operating body 25 for rotating the engaging claw 24 outside of the base C. The engaging claw 24 and the operating body 25 An operating rod 23 for transmitting a rotating force for clamping from outside of the base C to the engaging claw 24 in the hole 14 of the base C is rotatably disposed between the engaging claw. The connection between the operating rod 23 and the operating rod 23 is performed by inserting the engaging claw 24 eccentrically with respect to the operating rod 23 and rotating the operating rod 23 into the hole 14. Murrell is obtained by the freely disengagement between the engagement portion of the insertion portion. The insertion portion of the holding tool is inserted into the hole, and the holding tool is seated on the seat. When the insertion portion is prevented from being pulled out of the hole by the clamp mechanism, the holder is immovably supported by the stand. An embodiment of the present invention will be described below with reference to the drawings. First, the holder A shown in FIG. 7 will be described. The holder A has a well-known structure, and 1 is a main body having a groove 2 for receiving a grip by a tool changer and an abutment surface 3 for abutting against an end surface of a main shaft of a machine tool. Reference numeral 4 denotes a tool mounting portion provided at one end 1a of the main body 1 so that a tool 5, for example, a drill can be detachably mounted. Reference numeral 6 denotes an insertion portion connected to the other end 1b of the main body 1 for insertion into a tapered hole provided on the main shaft, and an outer peripheral surface 7 thereof corresponds to an inner peripheral surface of the tapered hole. It is formed on a tapered surface. Reference numeral 8 denotes a fitting recess for fitting a drive piece for rotation driving provided on the main shaft, and 9 denotes a fitting recess for engaging a clamp claw in a holding device retaining clamp device provided on the main shaft. Each of the engagement portions is shown. Next, a holder stand for holding the holder A as described above will be described with reference to FIGS. The holder stand B includes a base C for supporting the holder A, and a clamp mechanism D attached to the base C for fixing the holder A to the base C. The base C includes, for example, a base frame 11 for stable installation on a work table and a receiving tool 12 for receiving the holding tool A. 13 is a holder on the base frame 11
It is a bolt for attaching 12. The configuration provided in the receiving member 12 will be described. Reference numeral 14 denotes a hole for inserting the insertion portion 6 of the holder A. The insertion portion 6 has an inner diameter capable of being inserted tightly and without large backlash.
Is formed in a tapered shape corresponding to the outer peripheral surface 7 of the insertion portion 6. Reference numeral 16 denotes a detent piece for stopping the rotation of the main body 1 of the holder A, which is formed so as to be fitted into the fitting recess 8. Reference numeral 17 denotes a seat for holding the contact surface 3 of the holder A, which is provided around the opening 14a of the hole 14 as shown in the figure. Reference numeral 18 denotes a through hole for penetrating and supporting an operation rod described later in the clamp mechanism D. Reference numeral 19 denotes a stopper for regulating the rotation range of the operating rod, and reference numeral 20 denotes a bolt for preventing the stopper 19 from coming off. Next, the clamp mechanism D clamps the insertion portion 6 in the state where the insertion portion 6 of the holder A is inserted into the hole 14 of the base C and removes the insertion portion 6 from the hole 14. This is to prevent operation and to receive the operation force for clamping.
An operating rod 23 for transmitting from outside to the hole 14 of the receiving member 12, and a hole
An engaging claw 24 for engaging the engaging portion 9 of the insertion portion 6 within the insertion portion 14 and an operating body 25 for operating the engaging claw 24 outside the receiving member 12. ing. Operating rod
Reference numeral 23 is formed, for example, in the shape of a round bar, and allows the rotation and the advance and retreat in the axial direction to pass through the through hole 18 freely. Reference numeral 26 denotes a step for positioning the operation rod 23 with respect to the receiving member 12 in the axial direction. Reference numeral 27 denotes a groove for positioning the stopper 19, and reference numerals 28 and 29 shown in FIG. 2B denote engaging positions of the engaging claws 24, respectively. A position shown in FIGS. 1 to 4) and an engagement position (a position when the holder A is fixed to the stand B,
5 and 6), and includes a wall at one end and the other end of the groove 27 in the rotation direction of the operating rod 23. Numeral 30 indicates a concave portion for storing a key. Next, as described above, the engaging claw 24 is formed by using the engaging portion 9 for engaging the clamp claw of the holding device retaining clamp device provided on the main shaft of the machine tool as described above. That is, the existing structure for fixing to the main shaft of the machine tool is used to clamp the holder A to the stand, and to smoothly engage and disengage with the engaging portion 9. 2 (A), is formed in a disk shape, and is eccentrically attached to the operating rod 23. In this example, the operating rod 23 is formed integrally with the operating rod 23, but a separately formed one may be added later. Reference numeral 31 denotes a joint surface of the engaging claw 24 with the engaging portion 9, which is formed on a slope corresponding to the engaging portion 9 in order to prevent the engaging portion 9 from being damaged. Reference numeral 32 in the operation body 25 is a boss for rotating the operation rod 23. The boss 32 also serves as a spring case for accommodating a spring described later, and includes a spring accommodating chamber 33. Reference numeral 34 denotes an insertion hole for freely inserting and retracting the operation rod 23 in the axial direction, and reference numeral 35 denotes a key groove, which is formed to be long in the axial direction of the boss 32 (vertical direction in FIG. 1). Reference numeral 36 denotes a key for transmitting rotational power from the boss 32 to the operating rod 23. The key 36 has a keyway 35 for freely displacing its longitudinal displacement. You can move in and out. 37 is a washer for reducing friction between the receiving member 12 and the boss 32, and 38 is a handle for rotating the boss 32. Reference numerals 40 to 42 denote members for applying a downward urging force in FIG. 1 to the operating rod 23 in order to resiliently engage the engaging claw 24 with the engaging portion 9. Reference numeral 40 denotes a spring. A seat 41 is a retaining ring for preventing the spring seat 40 from coming off from the operating rod 23, and a compression coil spring 42 is interposed between the spring seat 40 and the bottom of the spring accommodating chamber 33. The method of using the holder stand B having the above structure is as follows. In the state where the engaging claw 24 is in the release position as shown in FIGS. 1 and 2, the insertion part 6 of the holder A is inserted into the hole 14 as shown in FIGS. Let sit. In this case, the fitting recess 8 is fitted with the rotation preventing piece 16. Next, the handle 38 is turned 180 degrees in the direction of arrow 44 in FIG. With this rotation, the engaging claw 24 rotates by the same angle in the same direction via the operating rod 23, and reaches the engagement position where it engages with the engagement portion 9 as shown in FIGS. As a result, the insertion portion 6 is fixed to the receiving member 12, and the holder A is fixed to the stand B. The process of engaging the engaging claw 24 with the engaging portion 9 by the above rotation is as follows. Due to the above rotation, first, the joining surface 31 of the engaging claw 24 comes into gentle contact with the engaging portion 9. When the engaging claw 24 is further rotated, the joining surface 31 comes into pressure contact with the engaging portion 9 with gradually larger force (downward force in FIG. 3 applied from the spring 42 via the operating rod 23). With this force, the holder A is pulled downward, and the contact 3 is pressed against the seat 17 for the time being. When the engagement claw 24 further rotates to reach the engagement position, the engagement claw 24 slightly rides on the engagement portion 9 as shown in FIG. 5, and all the force of the spring 42 is engaged. In addition to the joining portion 9, the holding state of the holder A is held. When the holder A is fixed as described above, the tool 5 is mounted on the tool mounting portion 4. In this case, since the main body 1 of the holder A is kept immovable by the stand B, a large force is applied to the mounting portion 4 using a wrench or the like, and the tool 5 is firmly tightened to perform the mounting. Can be done. The holder A after the mounting of the tool 5 as described above is removed from the stand B by an operation opposite to the above, and is used for use. As described above, according to the present invention, when the tool 5 is mounted on the tool mounting portion 4 of the holder A, the insertion portion 6 of the holder A is short. However, by inserting the insertion portion 6 into the hole 14 of the stand B, the seat 3 is seated on the seat 17 and the insertion portion 6 is prevented from being pulled out by the clamp mechanism D in this state, so that the holder A is released. There is a feature that it can be immovably supported by the stand B. as a result,
First, there is an effect that the work of mounting the tool 5 on the tool mounting portion 4 of the holder A can be easily performed.
In addition, there is a human safety that can prevent the holder A from falling on the hands and feet of the worker during the mounting work of the tool and injuring the worker. Third,
There is physical safety that can prevent an accident that the holder A falls on the floor and damages it.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a holder stand. 2A is a sectional view taken along line 2A-2A in FIG. 1, and FIG.
Is a sectional view taken along line 2B-2B. FIG. 3 is a longitudinal sectional view of a holder stand in a state where an insertion portion of the holder is inserted. 4A is a sectional view taken along line 4A-4A in FIG. 3, and FIG.
Is a sectional view taken along line 4B-4B. FIG. 5 is a longitudinal sectional view in a state where the holder is clamped on the stand. FIG. 6 is a sectional view taken along line VI-VI in FIG. 5; FIG. 7 is a partially cutaway view of the holder. [Description of Signs] A Holder B Holder Stand D Clamp Mechanism 3 Immediate 6 Insertion Portion 14 Hole 17 Seat

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B23Q 3/12 B23Q 13/00 B25H 1/00 B25H 1/10 B25H 3/00

Claims (1)

(57) [Claims 1] A tool mounting portion is provided at one end of a main body, and an insertion portion for inserting into a mounting hole provided in a main shaft of a machine tool is provided at the other end. A contact surface between the mounting portion and the insertion portion for contacting an end surface of a main shaft of the machine tool; and the insertion portion further includes a driving piece for rotational driving provided on the main shaft. And an engaging portion provided on an inner inner wall for engaging a clamp claw in a holding device retaining clamp device provided on the main shaft. A holder stand used for holding a holding tool, wherein a base C of the holding tool stand has a hole 14 for inserting the insertion portion of the holding tool, and an opening of the hole 14. And a seat 17 for seating an immediate surface of the holder around the periphery of the holder. In the stand, in the hole 14, a rotation stopper piece 16 adapted to be fitted to the fitting recess in order to stop the rotation of the insertion portion.
And an engagement claw 24 for engaging with an engagement portion provided on the inner wall of the insertion portion inserted into the hole 14.
Outside the base C, an operating body 25 for rotating the engaging claw 24 is provided.
And an operating rod 23 for transmitting a rotating force for clamping from outside the base C to the engaging claw 24 in the hole 14 of the base C between the operating body 25 and the operating body 25. Further, the engagement between the engaging claw 24 and the operating rod 23 is performed by attaching the engaging claw 24 eccentrically to the operating rod 23 and rotating the operating rod 23 to form the hole 14. A holder stand, wherein the insertion part inserted into the holder can be freely disengaged from the engagement part.