JPH10263967A - Work holding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a holder from dropping from a base by providing the holder constituted of a support pin removable from an attachment and having the screw hole of an adjusting screw between the attachment and the adjusting screw. SOLUTION: An attachment is mechanically fitted to an angle rest 50. The smooth-diameter section of a properly selected support pin 44 is inserted into the large-diameter hole section of the attachment 43. An adjusting screw 45 is screwed and properly rotated so that the length of a holder 41 becomes equal to the interval from the vertical face of the angle rest 50 to the outer end face of a work as a whole. The work up to this point can be wholly done by a single worker, and the holder 41 is prevented from drifting against the angle rest 50 or dropping from it in this state (the state before a fastening bolt 23 is fastened).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a device for holding a workpiece. The holding device of the present invention is suitably used, for example, when fixing a workpiece to a scale of a horizontal boring machine.

[0002]

2. Description of the Related Art A horizontal boring machine is often used for boring large workpieces because of the ease of processing chips during processing. Conventionally, in such a horizontal boring machine, a workpiece is fixed as shown in FIG.

A workpiece 1 is placed on a table 3 via a support 11. Supports 12 and 13 are also interposed between the workpiece 1 and the scale 5. A holding device 20 for fixing the workpiece 1 is provided at an upper end of the workpiece 1. The holding device 20 includes a holding plate 21 and a tightening bolt 2.
3 and a holder 25. The holder 25 includes an attachment 26 and an adjusting screw 28. A magnet 27 is attached to one end of the attachment 26, and an adjustment screw 28 is screwed to the other end. By rotating the adjusting screw 28, the amount of protrusion from the attachment 26 is adjusted. Thus, the length of the holder 25 is set to a desired length (the length of the scale 5-the length of the outer end surface of the workpiece 1).
Can be adjusted.

With the holder 25 thus adjusted interposed between the scale 5 and the holding plate 21, the workpiece 1 is clamped between the scale 5 and the holding plate 21 by tightening the tightening bolts 23. Will be done. If the holder 25 is not provided, the holding plate 21 escapes even when the holding plate 25 is tightened with the fastening bolt 23, that is, the upper end side of the holding plate 21 falls to the left in the drawing, and the workpiece 1 cannot be fixed. .

[0005] Reference numeral 30 in the figure is a boring byte.

[0006]

In the above-mentioned holding device 20, since the attachment 26 of the holder 25 and the scale 5 are connected by the magnetic force of the magnet, the connection between the two may become unstable. In particular, when the workpiece 1 is large and the distance between the vertical surface of the scale 5 and the holding plate 21 is long and a large attachment 26 must be used, the following problems have occurred.

Considering the work of removing the attachment 26 and the suction of chips, there is a certain limitation on the strength of the magnetic force of the magnet 27. Therefore, when the attachment 26 becomes large, there is a possibility that the attachment 26 will be displaced only by the magnetic force of the magnet 27, and in some cases, it will fall.
Therefore, when attaching the holding device 20, the fastening bolt 23 must be tightened while supporting the attachment 26, and two workers are required to attach the holding device 20. The possibility of the holder 25 being dropped is not preferable in terms of work safety.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems. That is, a holding plate for a workpiece, an attachment mechanically attached to a base, an adjusting screw for finely adjusting the position of the holding plate, and the attachment provided between the attachment and the adjusting screw, A workpiece comprising a support pin which is detachable with respect to the support pin and has a screw hole for the adjusting screw, and means for holding the workpiece between the holding plate and the base. Holding device.

DETAILED DESCRIPTION OF THE INVENTION As a means for mechanically attaching an attachment to a scale, there is screwing or the like. The attachment is preferably detachable from the scale. This is because it is necessary to replace the attachment with one corresponding to the size of the workpiece depending on the size of the workpiece. Since the attachment is mechanically fixed to the scale, the connection between the two is not unstable.

As the adjusting screw, the same one as in the prior art can be used, and the length of the entire holder is finely adjusted by the adjusting screw.

The support pins are used to roughly adjust the length of the entire holder, that is, the distance between the vertical surface of the scale and the pressing plate, by using the support pins, and various lengths of the support pins are prepared. If the entire length of the holder becomes extremely long, the support pin is divided, and one end of the support pin is detachably connected to the attachment, and the other end of the first support pin is detachably connected to the other end of the first support pin. It can be a second support pin that is freely connected.
At the other end of the second support pin, a screw hole for an adjustment screw is formed. Of course, this support pin can be divided into three or more. Means for making one end of the support pin detachable from an attachment or another support pin include fitting, screwing, a magnet and a cam lock.

[0012] On the vertical surface of the scale, continuous grooves are formed at least in the vertical direction and the horizontal direction, preferably in a lattice shape. A nut slider is inserted into the groove, and the nut slider serves as a nut for a tightening bolt. Similarly, this nut slider is used when screwing the attachment. By moving the nut slider along the groove, the fastening bolt and the holder can be set at desired positions.

A support may be interposed between the holding plate and the adjusting screw. In the above description, the example in which the workpiece is fixed to the scale of the horizontal boring machine has been described, but the holder of the present invention is not limited to the one used for the horizontal boring machine. The present invention can be applied to all cases in which a holding device having a bridge structure is formed on a substrate with a holder, a holding plate, and a fastening bolt.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. 2 and 3, the same members as those in FIG. 1 are denoted by the same reference numerals, and the description thereof will be partially omitted.

The holding device 40 of the embodiment comprises a holding plate 21, a fastening bolt 23 and a holding tool 41. Holder 41
Is composed of a mounting bolt 42, an attachment 43, a support pin 44, and an adjusting screw 45.

The attachment 43 is a cylindrical member with a bottom and has a small hole 431 in the bottom as shown in detail in FIG.
Are formed. In this hole 431, the mounting bolt 42
Is inserted. The head of the mounting bolt 42 is housed in the large-diameter hole 432 of the attachment 43. The large diameter hole 432 has a step 434 as a stopper. Reference numeral 421 in the figure is a washer.

The support pin 44 is a columnar member,
It comprises a small diameter part 441 and a large diameter part 442. The small-diameter portion 441 is inserted into the large-diameter hole 432 of the attachment 43, and the tip of the small-diameter portion 441 contacts the step portion 434. The outer diameter of the small diameter portion 441 is slightly smaller than the inner diameter of the hole 432, so that both are detachable. The small diameter portion 441 is required to have a sufficient length (60 mm in the embodiment). As a result, the support pins 44 do not fall out of the attachment 43, and the connection between the attachment 43 and the support pins 44 is stabilized. The large diameter portion 442 of the support pin 44 has a screw hole 443.
Are drilled. The shaft of the screw hole 443 and the large diameter portion 44
The two axes substantially coincide. In the embodiment, the length of the large diameter portion 44 is 3
A plurality of different ones were prepared at intervals of 0 mm.

The cross section of the large-diameter hole portion 432 of the attachment 43 and the small-diameter portion 441 of the support pin 44 are preferably circular in order to give a degree of freedom in the direction of attaching the support pin 44 to the attachment 43. .

The adjusting screw 45 includes a shaft portion 451 and a head 452. By rotating the adjusting screw 45, the amount of protrusion of the head 452 from the support pin 44 is finely adjusted. The upper end of the head 451 is substantially flat and is applied to the holding plate 21.

A groove 55 is formed on the vertical surface of the scale 50. The groove 55 includes a wide portion 551 and a narrow portion 552, and is formed in a grid on the vertical surface of the scale 50. The nut slider 51 is inserted into the groove 55. The nut slider 51 includes a first portion 511 located within the wide portion 551 of the groove 55 and a narrow portion 552.
And a second portion 512 located therein and having a threaded hole therethrough. The first portion 511 is a narrow portion 552 of the groove.
Is undercut with respect to the peripheral wall 553.

The first portion 5 facing the peripheral wall 553
It is preferable to dispose a compression coil spring and a steel ball to be urged at a portion 51 and urge the steel ball toward the peripheral wall 553 by the repulsive force of the spring to stabilize the position of the nut slider 51.

The screw portion of the mounting bolt 42 described above is screwed into the screw hole of the nut slider 51. When the mounting bolt 42 is tightened, the first
The portion 551 contacts the peripheral wall 553 of the narrow portion 552 of the groove, and the first portion 551 and the head 421 of the mounting bolt 42 sandwich the peripheral wall 553 and the bottom of the attachment 43. As a result, the scale 50 and the attachment 43 are mechanically and stably connected.

The second groove 5 is further provided on the vertical surface of the scale 50.
7 is formed, and the second nut slider 53 is inserted into the second groove 57. Second groove 57 and second groove 57
The configuration of the nut slider 53 is the same as that of the groove 55 and the nut slider 51 described above. Second nut slider 53
The screw portion of the tightening bolt 23 is screwed into the screw hole.

The holding device 40 of the embodiment having the above configuration is set as follows. First, the nut slider 51 and the second nut slider 53 are moved to desired positions according to the size and shape of the workpiece 1. Then, the mounting bolt 42 is passed through the attachment 43, screwed into the nut slider 51, and tightened. Thereby, the attachment 43 is mechanically attached to the scale 50. Then, the small-diameter portion 441 of the support pin 44 selected as appropriate is inserted into the large-diameter hole portion 432 of the attachment 43. Thereafter, the adjusting screw 45 is screwed and rotated appropriately so that the length of the holder 41 is equal to the distance from the vertical surface of the scale 50 to the outer end surface of the workpiece as a whole.

All the operations up to this point can be performed by a single worker, and the holder 41 is in this state (the state before the tightening bolt 23 is tightened).
It does not shift or fall against.

Next, the screw portion of the tightening bolt 23 is
Screwed into the nut slider 53 and tightened. Thereby, the workpiece 1 is sandwiched between the vertical surface of the scale 50 and the holding plate 21 via the support 13. At the time of this tightening operation, since the holding tool 41 is stably connected to the scale, there is no need for an operator to support this. Therefore, this fastening operation can be performed by one worker.

[0027]

As described above, according to the holding device of the present invention, the holding plate for the workpiece, the attachment mechanically attached to the base, and the adjustment for finely adjusting the position of the holding plate are provided. A screw, a holder provided between the attachment and the adjustment screw, the holder comprising a support pin detachably attached to the attachment and having a screw hole for the adjustment screw, and the holding plate for holding the workpiece. And means for sandwiching the base with the base. According to the holding device configured as described above, in order to maintain the connection to the base farthest from the free end of the holding tool, a mechanical point is required at the connection point between the base and the holding tool that is subjected to the largest load. A connecting means is employed. Therefore, even if the workpiece becomes large and the holder becomes large accordingly, the stability of connection to the base is not lost.

This eliminates the need to support the holder when tightening the tightening bolt, so that the tightening operation can be performed by one worker. That is,
ADVANTAGE OF THE INVENTION According to this invention, the operation | work which fixes a to-be-processed object to a base becomes easy.

Further, since the connection of the holder to the base is stabilized, the holder does not drop from the base, which is preferable in terms of safety.

(1) Apply one end of the holding plate to the workpiece,
When the work piece is fixed between the holding plate and the base by tightening the holding plate to the base side, a holding member disposed between the other end of the holding plate and the base. An attachment mechanically attached to the base, an adjustment screw for finely adjusting the position of the presser plate, and provided between the attachment and the adjustment screw; And a support pin which is detachable and has a screw hole for the adjusting screw.

(2) The holder for a workpiece according to (1) or (1), wherein the base is a scale of a horizontal boring machine.

[Brief description of the drawings]

FIG. 1 shows a conventional holding device.

FIG. 2 is a partial cross-sectional view of a horizontal boring machine showing an aspect of use of the holding device according to the embodiment of the present invention.

FIG. 3 is a partially enlarged view of FIG. 2;

[Explanation of symbols]

 Reference Signs List 1 Workpiece 5, 50 Scale 20, 40 Holding device 21 Holding plate 23 Tightening bolt 25, 41 Holder 29, 45 Adjusting screw 42 Mounting bolt 43 Attachment 44 Support pin 51, 53 Nut slider 55, 57 Groove

Claims (1)

[Claims] 1. A holding plate for a workpiece, an attachment mechanically attached to a base, an adjusting screw for finely adjusting the position of the holding plate, and a fixing screw provided between the attachment and the adjusting screw. A holding tool comprising a support pin which is detachable from the attachment and has a screw hole for the adjusting screw, and means for holding the workpiece between the holding plate and the base. Workpiece holding device.