JPH0985557A - Work placing table and work pressing jig used for it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work placing table in which the shape of the work placing surface can be changed according to the shape of the surface to be placed of a work. SOLUTION: A pin supporting table is provided with a pin housing space S. A plurality of work supporting pins 6 are held in the pin housing space S so as to be raised and lowered. Coil springs 7 energize the work supporting pins 6. The work placing surface M is constituted of the surface including the tip points of respective work supporting pins 6. Accordingly, when a work W is placed on the work placing surface M, respective work supporting pins 6 are lowered against the coil springs 7 according to the shape of the surface to be placed. As a result, the shape of the work placing surface M is matched to the shape of the surface to be placed of the work W. A clamp fitting 12 holds and fixes the work placing surface with the shape by being made to project and retreat from the pin housing space S.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work placing table on which a work is placed and a work pressing jig used therefor.

[0002]

2. Description of the Related Art For example, when a work whose mounting surface is not a flat surface is placed on a flat work mounting table, the work partially lifts from the work mounting table. Will end up. Therefore, when the floating portion of the workpiece is to be processed, there is a problem that the workpiece cannot be directly supported by the workpiece placing table and the workpiece is deformed or, in the worst case, is damaged.

The present invention has been made in view of the problems existing in the above-mentioned prior art, and its purpose is to change the shape of the work mounting surface according to the shape of the mounting surface of the work. An object is to provide a possible work placement table and a work pressing jig used therefor.

[0004]

In order to achieve the above object, according to the invention of claim 1, the pin supporting base and the pin supporting base are held so as to be able to move up and down, and the tip end thereof constitutes the work mounting surface. The work mounting table includes a plurality of work support pins, a biasing unit that biases the work support pins in an upward direction, and a fixing unit that can fix each work support pin.

According to a second aspect of the present invention, the fixing means is provided on the pin support base, and defines a lateral body of the work support pin group, and a clamp fitting capable of projecting and retracting in the inner space of the frame body. It consists of

According to the third aspect of the present invention, the pin support base is provided with at least three height reference pins that cannot be moved up and down. According to a fourth aspect of the present invention, there is provided a work pressing jig for pressing the work placed on the work placing table against the work placing surface, which is held by the jig body and the jig body so as to be capable of moving up and down. , And a plurality of pressing pins forming a work pressing surface with its tip portion.

(Operation) In the invention of claim 1 having the above-mentioned structure, the work is placed on the work placement surface constituted by the tip portions of the plurality of work support pins. Each work support pin is lowered by the weight of the work against the biasing means.

Here, for example, if the shape of the work mounting surface is not flat, the amount of lowering of each work support pin depends on the degree of unevenness of the mounting surface of the corresponding work. In this state, the work support pins are fixed at the respective lowered positions by the fixing means, so that the work placement surface of the work placement table is held and fixed in a state along the shape of the work placement surface. Therefore, the work is uniformly supported by the work mounting surface.

According to the second aspect of the present invention, the clamp fitting is retracted into and retracted from the inner space of the frame body to press the work support pin group from the side thereof. Since the lateral periphery of the work support pin group is defined by the frame body, the work support pin arrangement intervals in the inner space of the frame body become close due to the protruding and retracting of the clamp fittings. Therefore, the sliding contact resistance between the respective work support pins becomes large, the work support pins cannot be moved up and down, and are fixed at respective positions.

According to the third aspect of the present invention, the work placed on the work placing table is supported by at least three height reference pins which cannot be moved up and down, and the work placing height on the work placing table is set. Is prescribed. In other words, since the work support pins can be moved up and down, the shape of the work placement surface changes greatly depending on how the work is placed and placed. The same height reference pin sets the work placement height to at least three points. It is designed to prevent it.

By using the work pressing jig according to the invention of claim 4, the work mounting surface of the work mounting table is
It is designed to assist the work according to the shape of the mounting surface of the work. That is, depending on the work, the work support pin may not be able to be lowered depending on the shape of the mounting surface because it is lightweight. In such a case, if the work pressing jig of the present invention is pressed against the work on the work mounting surface with the work pressing surface, the pressing force compensates for the insufficient weight of the work, The support pin can be lowered according to the shape of the mounting surface. Further, since the work pressing surface is composed of a plurality of up and down pressing pins, the shape of the work pressing surface is changed according to the shape of the pressed surface of the work. Therefore, the pressing force of the jig can be uniformly applied to the pressed surface of the work.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. The work mounting table 1 and the work pressing jig 21 of the present embodiment are configured for the purpose of holding and fixing the disk-shaped work W.

First, the work mounting table 1 will be described.
As shown in FIGS. 1 to 4, the pin support base 2 includes a base plate 3,
The frame body 4 and the cover plate 5 are polymerized and fixed in order from the lower layer. The frame body 4 has a through hole 4α having a regular dodecagonal cross section in the center thereof, and the space surrounded by the inner wall surface of the through hole 4α, the base plate 3 and the cover plate 5 is an inner space. As a pin accommodating space S. A plurality of (1051 places in this embodiment) pin support holes 3α are penetratingly formed in the base plate 3 at positions corresponding to the pin accommodating spaces S. Further, the same number of pin projecting holes 5α as the same number of pin supporting holes 3α are formed so as to be coaxial with the corresponding pin supporting holes 3α in the cover plate 5.

The work supporting pin 6 is integrally formed with a work supporting portion 6α having a convex end surface, a cylindrical large diameter portion 6β having a diameter larger than the work supporting portion 6α, and an insertion portion 6γ. ing. The workpiece support pin 6 has an insertion portion 6γ in the pin support hole 3α and a workpiece support portion 6α.
Are inserted into the pin projecting holes 5α that are coaxial with the pin support holes 3α, and are thus held in the pin housing space S so that they can move up and down. Same work support pin 6
Is the stopper 6 on the upper end side and the lower end side of the insertion portion 6γ.
The δ is brought into contact with the opening edges of both ends of the pin support hole 3α, whereby the amount of vertical movement is defined.

A coil spring 7 as an urging means is interposed between the stopper 6δ on the upper end side of the insertion portion 6γ and the upper surface of the base plate 3 to move the work support pin 6 upward in the plane of FIG. 2 and FIG. I am pushing toward. Therefore, each work supporting pin 6 always has its work supporting portion 6α.
Through the pin projecting hole 5α of the cover plate 5 from the inside of the pin housing space S to the outside. Each work supporting part 6
The surface including the leading end point of the above-mentioned point constitutes the work placement surface M that is planar when the work is not placed. A small gap (not shown) is secured between the large-diameter portions 6β in the work support pin 6 group, and the work support pins 6 are prevented from moving up and down by sliding contact between the large-diameter portions 6β. There is no such thing.

The three outer peripheral side members in the group of work supporting pins 6 cannot be moved up and down by inserting a cap 8 into the projecting portion of the work supporting portion 6α from the pin projecting hole 5α. The height reference pin 9 is formed.
The three height reference pins 9 are arranged at positions corresponding to the vertices of an equilateral triangle.

As shown in FIG. 3, the two backing plates 10 and the two pushing plates 11 are arranged at equal intervals along the outer peripheral edge of the pin accommodating space S on the upper surface of the frame body 4. The tip edges of the contact plate 10 and the push plate 11 facing the pin accommodating space S are shaped so as to match the peripheral surfaces of the large diameter portions 6β of the corresponding work support pin 6 group. And 2
The two push plates 11 can be moved in the direction of the facing plates 10 facing each other by adjusting the rotation of the screws. Therefore, by moving and adjusting the position of the push plate 11, the push plate 11 presses the corresponding large-diameter portion 6β toward the contact plate 10 with the tip edge of the push plate 11, and the work support pin 6 in the pin housing space S is pressed. Can be aligned at a predetermined position, and the degree of density, that is, the gap between the large diameter portions 6β can be adjusted.

The accommodating recess 4β is a through hole 4 in the frame 4.
A clamp metal fitting 12, which is a concave portion provided on the inner wall surface of α and constitutes a fixing means, is accommodated in the accommodation recess 4β. The clamp metal fitting 12 can be adjusted by rotating the knob 13.
The pin accommodating space S can appear and disappear from the side. Then, the knob 13 is rotationally adjusted so that the clamp metal fitting 12 is retracted into the pin housing space S, so that the clamp metal fitting 12 presses the large-diameter portion 6β of the work support pin 6 group. Therefore, the large-diameter portions 6β whose lateral outer periphery is defined by the frame body 4 have a large degree of denseness in the pin housing space S, and there is no minute gap between the large-diameter portions 6β.
As a result, the sliding contact resistance between the large diameter portions 6β increases, and the work support pins 6 cannot move up and down.

The two work abutting plates 14 and the one work pushing plate 15 as the work fixing means are the cover plates 5
The receiving surface 14 formed on the upper surface of the
The work mounting surface M is exposed from the side by α and 15α. Then, the two work contact plates 14 have the receiving surface 1
The mounting position of the work W on the work mounting surface M is defined by 4α. Further, the work pushing plate 15 is moved by rotationally adjusting the knob 16, so that the work W is pressed against the receiving surface 14α of the work contact plate 14 with its receiving surface 15α and fixed.

Next, the work pressing jig 21 will be described. As shown in FIGS. 5 and 6, the jig body 22 is
The upper plate 23, the middle plate 24, and the lower plate 25 each having a disc shape.
Are polymerized and fixed. On the lower plate 25, a plurality of (1
Pin projection holes 25α are formed at 051 places). The up-and-down allowance concave portion 24α is provided in the intermediate plate 24 at a position corresponding to the pin projecting hole 25α. The pressing pin 26 has a tip end portion having a convex curved surface shape, and a base end portion formed with a stopper 26α having a diameter larger than that of the pin projecting hole 25α. Further, the pressing pin 26 is inserted and arranged with its tip end into the pin projecting hole 25α from the side of the vertical movement allowing recess 24α. Therefore, the pressing pin 26 has its stopper 26α brought into contact with the rear surface of the lower plate 25 or the inner bottom surface of the vertical movement allowance concave portion 24α of the middle plate 24 to define the amount of vertical movement. The surface including the tip point of each pressing pin 26 constitutes the work pressing surface O of the present embodiment. The three adjusting screws 27 as the pressing force adjusting means are provided on the lower surface of the lower plate 25 at equal intervals along the outer peripheral edge thereof. The adjusting screw 27 rotates the lower plate 2 by itself.
5 is expanded and contracted with respect to the lower surface. This work pressing jig 2
1 is mounted on the upper surfaces of the work contact plate 14 and the work pressing plate 15 of the work mounting table 1 by the adjusting screw 27. By rotating and adjusting the adjusting screw 27, the amount by which the pressing pin 26 can be moved up and down, that is, the pressing force of the jig 21 is adjusted. In addition, in FIG. 5, 28 is a handle for facilitating the handling of the main jig 21 by an operator.

Next, a method of using the work mounting table 1 and the work pressing jig 21 will be described with reference to FIGS. 7 and 8. First, the work W is placed on the work placement surface M such that its circumferential side is along the receiving surface 14α of the work contact plate 14. When the work W is placed on the work placement surface M, each work support pin 6 is lowered by its weight.

At this time, as shown exaggeratedly in FIG.
On the mounting surface H of the work W₁Is flat due to distortion or unevenness
May not have done. In such a case,
Table H ₁Under each work support pin 6 according to the degree of unevenness of
The amount of falling is changed, and the surface is flat when the workpiece is not placed.
The workpiece mounting surface M is the mounted surface H of the workpiece W.₁In shape
The surface shape is changed accordingly.

By the way, since the work support pins 6 can be raised and lowered, the shape of the work mounting surface M differs depending on how the work W is placed on the work mounting surface M. However, the three height reference pins 9 that cannot be raised and lowered
However, since the work W is supported by the three points, the unevenness of the elevation of the work support pin 6 is eliminated, and the work W is arranged by the height reference pin 9 at the predetermined mounting height defined by the three points. be able to.

However, the weight of the thin plate-shaped work W is not significantly heavier than the total spring force of the work support pins 6 against it. Therefore, as mentioned above,
Even if the height reference pin 9 is provided, how to place the work W on the work placement surface M depends on a part of the work support pins 6
If the load is unevenly distributed, the workpiece W cannot contact the three height reference pins 9 and the non-contacting portions of the workpiece W float above the workpiece mounting surface M. There is a risk that

Therefore, the work pressing jig 21 of this embodiment is used. That is, as shown in FIG. 7 and FIG.
The pressing jig 21 is brought into contact with the pressed surface H ₂ of the work W on the work mounting surface M with its work pressing surface O, and with the three adjusting screws 27, the work pressing plate 14 of the cover plate 5 and It is placed on the upper surface of the work pushing plate 15. Therefore, the surface to be pressed H ₂ of the work W is pressed by the self-weight of the vertically movable press pin 26, and the lightweight point of the work W is covered. As a result, the work W, which is lightweight but partially floated from the work placement surface M, is exactly pressed against the three height reference pins 9 to be corrected to a predetermined placement height. It

The work W has three height reference pins 9
At supported state by, securing the workpiece support pin 6 at its lowered position by the clamp member 12 of the knob 13 rotates adjusted to, surface H ₁ a workpiece placement surface M mounting the workpiece W
Hold and fix in a state according to the shape. In addition, knob 16
The work pressing plate 15 is moved to the work contact plate 14 side by rotationally adjusting the
The work W is clamped and fixed by. Then, after the work pressing jig 21 is removed from the work mounting table 1, the work W is subjected to predetermined processing.

In the present embodiment having the above configuration, the following
It produces such an effect. (1) The work placement surface M supports a plurality of work pieces that can expand and contract.
It is composed of pins 6, and the workpiece mounting surface M is
Mounting surface H of the workpiece W₁It is possible to change the shape according to
I have. Therefore, the mounting surface H of the work W is₁Regardless of shape
However, the mounting surface H₁Can support uniformly
You. (2) The work support pin 6 is fixed by the clamp metal fitting 1
2 is made to appear and disappear in the pin accommodation space S
You. In other words, the pin housing space is as large as the amount of the clamp metal fitting 12 that appears.
To increase the degree of denseness of the large diameter portion 6β in the space S
Causes a sliding contact resistance between each large diameter part 6β
The support pin 6 cannot be moved up and down. Therefore, each work support
Compared to providing a stopper structure on the holding pin 6, it is simpler
Fixing means can be configured with a structure, and the work mounting table 1 can be made inexpensive.
Can be configured. (3) Three height reference pins 9 that cannot be moved up and down are provided. Follow
Then, how to place the work W on the work placement surface M is
Even if the load is unevenly distributed on some work support pins 6,
At least one height reference pin 9 is part of the work support pin 6
It regulates the excessive descent in the remaining height reference pin 9
The workpiece W can be brought into contact with. Therefore, the work
The mounting height of W can be set to the specified height, and the same work can be performed.
The nerve about how W is placed on the work placement surface M
No need to use. (4) The height reference pin 9 is attached to the tip of the work support pin 6.
It is simply configured by fitting the cap 8. Obedience
By providing a pin body only for the height reference pin 9,
It is not necessary and can be constructed at low cost. (5) In the work support pin 6,
The tip surface has a convex curved shape. Therefore, support for the same work
The contact of the pin 6 against the work W becomes softer,
There is no risk of scratching the ark W. (6) For example, the weight applied to the unit work support pin 6
In the case of a thin plate-like work W with a small amount (for example, the thickness
Due to lack of weight, compared to the plate-shaped
H₁The work support pin 6 up and down according to the shape of
May not be possible. However, the work
By using the brazing jig 21,
Since the weight shortage is resolved, the work support pin 6 is attached to the work W.
Placement surface H ₁It can be lowered according to the shape. (7) The work pressing surface O of the work pressing jig 21 is
It is composed of a number of pressing pins 26 that can be raised and lowered. Obedience
Thus, the shape of the pressing surface O is the pressed surface H of the work W.₂of
The pressed surface H is changed according to the shape.₂Uniform pressing force
It is possible to press with. (8) The tip surface of the pressing pin 26 has a convex curved surface shape.
Therefore, the pressing pin 26 has a soft contact with the work W.
It may cause damage to the work W, etc.
There is no.

Note that the scope does not depart from the gist of the present invention
Then, it can also be implemented in the following modes. (1) Attach the height reference pin 9 to the cover plate 5, base plate 3, etc.
Construct by directly implanting the pin body. (2) Provide four or more height reference pins 9. Same height
As the number of quasi-pins 9 increases, it becomes easier to define the mounting height of the work W.
However, conversely, the smaller the number, the mounting surface H of the work W ₁shape
The adaptability of the work placement surface M to the (3) The upper surface of the work support pin 6 in the above embodiment
The stationary shape is a regular dodecagon, but this is a disk-shaped workpiece.
It is configured only to mount W, and various
Workpiece mounting for mounting and fixing the workpiece W having the top surface shape
If it is a table, the work support pin 6 should have a square upper surface.
Should be arranged and handled. On the contrary, like this embodiment
If the outer shape of the work is specified, match the shape.
The work supporting pins 6 may be arranged by using the above. (4) The biasing means is a fluid pressure such as hydraulic pressure, water pressure or air pressure.
And (5) The pressing pin 26 of the work pressing jig 21 has its own weight.
It was configured to press the work W by
This is changed and the pressing pin 26 is urged by a biasing means such as a spring.
It may be biased in the extension direction.

The technical idea understood from the above embodiment will be described. The work mount table according to claim 3, wherein the height reference pin 9 is configured by making a part of the work support pin 6 unmovable by a fixture 8.

In this way, the height reference pin 9 can be easily constructed by only attaching the fixture 8 to the work support pin 6.

[0031]

According to the invention of claim 1 having the above-mentioned structure, since the work mounting surface can be changed according to the shape of the mounted surface of the work, the work mounting surface can uniformly support the work. Done Therefore, the work can be stably held.

According to the second aspect of the present invention, each work supporting pin can be fixed at each elevating position only by pressing a part of the side of the work supporting pin by the clamp metal fitting.
Therefore, the structure can be simpler than that of providing a stopper or the like on each work support pin.

According to the third aspect of the invention, the method of placing and placing the work on the work placement surface is not specified, and the troublesomeness is released. According to the invention of claim 4, by using the present work pressing jig, the work support pin can be lowered according to the shape of the mounting surface even in a work having a thin plate shape, for example. Further, the pressing force can be uniformly applied to the pressed surface of the work.

[Brief description of drawings]

FIG. 1 is a plan view of a work placement table.

FIG. 2 is a side view of the work placement table.

3 is a cross-sectional view taken along the line AA in FIG.

FIG. 4 is a sectional view taken along line BB in FIG. 3;

FIG. 5 is a side view showing a work pressing jig partially broken.

FIG. 6 is a bottom view of the work pressing jig.

FIG. 7 is a diagram showing a usage state of a work placing table and a work pressing jig.

FIG. 8 is an enlarged view of a main part.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Work mounting base, 2 ... Pin support base, 4 ... Frame body which comprises a fixing means, 6 ... Work support pin, 7 ... Coil spring as an urging means, 12 ... Clamp metal fitting which comprises a fixing means, M ... Work Placement surface.

Claims (4)

[Claims] 1. A pin support base, a plurality of work support pins that are held on the pin support base so as to be able to move up and down, and that form a work placement surface with their tips, and a biasing force for the work support pins in the upward direction. A work mounting table provided with a biasing means and a fixing means capable of fixing each work supporting pin. 2. The fixing means comprises a frame body which is provided on a pin support base and which defines a lateral periphery of the work support pin group, and a clamp fitting which can be retracted into and out of the inner space of the frame body. Work placement table described in. 3. The work mount table according to claim 1, wherein the pin support table is provided with at least three height reference pins that cannot be moved up and down. 4. A work placed on a work placing table,
A work pressing jig for pressing against a work placement surface, the work including a jig main body and a plurality of pressing pins that are held in the jig main body so as to be capable of moving up and down and that form a work pressing surface with their tip portions. Pressing jig.