JP2665883B2 - Ruler stopper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ruler stopper in a drafting apparatus, and more particularly to a ruler which can apply a predetermined pressing force to a connecting means between sliders for moving a ruler in parallel, thereby inadvertently moving the ruler. The present invention relates to an improvement of a ruler stopper suitable for preventing the above.

[0002]

2. Description of the Related Art Conventionally, a guide path extending in the front-rear direction of a drawing board is formed in a frame fixed to both side surfaces of a drawing board, and a pair of sliders fixedly supporting a ruler are moved along the guide path. 2. Description of the Related Art A drawing apparatus provided so as to be able to be provided is known.

FIG. 9 shows an example of a drawing apparatus of the type described above. The drafting apparatus 100 includes a drafting board 10
1, a pair of frames 102 fixed to both left and right sides of the drawing board 101, a slider 103 movable in the front-rear direction along a guide path (not shown) formed in these frames 102, and between the sliders 103. Connected ruler 1
05.

The slider 103 is connected to each other by an endless wire (not shown) arranged in the frame 102, and the endless wire is adjusted by a plurality of pulleys in the reciprocating direction so that the slider 103 and the ruler 105 are adjusted. Can be translated on the drafting board 101 back and forth.

In this type of drafting apparatus, a stopper 107 for enabling the ruler 105 to freely move when not in use or for restricting the movement of the ruler 105 when not in use is provided by the endless wire. , For example, on the front side surface of the pen tray 18. The stopper 107 is conventionally formed of a bolt, and applies a pressing force to the endless wire at the tip end of the bolt by adjusting the axial position of the bolt, thereby restricting the rotation of the endless wire. Thus, the movement of the slider 103 and thus the ruler 105 can be restricted.

[0006]

However, in such a stopper 107, the above-described bolt rotating operation is required every time the movement of the ruler 105 is restricted and the restriction is released, and the operation is compared. There was the inconvenience of being troublesome.

In addition, according to the bolt tightening method, the degree of tightening that can apply a sufficient pressing force to restrict the movement of the ruler 105 depends solely on the sense of the operator, and a tightening failure occurs. There is an inconvenience that the ruler 105 can be easily moved as a result. If such movement occurs during the transportation process of the drafting apparatus 100, it causes damage to related parts and causes a failure.

On the other hand, if the bolt is excessively tightened, an excessive pressing force is applied to the endless wire, and the collapse of the wire cannot be avoided unless an endless wire having considerable rigidity is used. Therefore, the selection of the material used for the endless wire is unavoidably limited, and the degree of freedom in design cannot be obtained. In addition, when the wire is crushed, the entire length of the wire changes, resulting in a fatal defect that the original parallel accuracy of the ruler 105 cannot be maintained. Further, in this case, the endless wire must be replaced anew, and in addition to the cost burden, there is also a disadvantage that the components need to be partially disassembled to separately wire the wire.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the inconvenience of the conventional example, and has as its object to apply and release a pressing force to a connecting means such as an endless wire by one-touch operation. Can be performed, and the movement of the ruler can be always regulated with a constant pressing force regardless of the operator, thereby preventing deformation of the connecting means and prolonging use of the ruler. It is to provide a stopper.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a ruler moving slider provided movably along both sides of a drawing board, and a movement of each of the sliders connected to these sliders. Endless connecting means for holding the same amount, and a ruler stopper provided to apply a predetermined pressing force to the connecting means so as to regulate the movement of the connecting means, in a circulating direction of the connecting means. A movable member provided movably between a rotation restriction position and a non-rotation restriction position at a predetermined position along the way, and a pressing member capable of pressing the connecting means following the movement of the movable member. The pressing member presses the connecting means when the movable member is at the rotation restricting position, and the pressing member is releasably provided when the movable member is at the non-rotation restricting position.

In the ruler stopper, the pressing member is formed with a restricting portion for keeping the pressing force of the connecting means constant and preventing the connecting means from dropping out of the area pressed by the pressing member.

Further, the movable member is constituted by a lever rotatably provided with one end as a fulcrum, and a free end of the lever is provided so as to be engageable with a stationary member adjacent to the lever by a click operation. The rotational power of the lever is provided so as to be transmitted to the pressing member via a feed screw shaft structure.

[0013]

When the movable member is adjusted to the rotation restricting position, the pressing member following the movement of the movable member presses the connecting means, and the frictional resistance generated by this pressing restricts the rotation of the connecting means. This restricts the free movement of the slider and the ruler connected thereto.

On the other hand, when the movable member is moved to the non-rotation control position, the pressing force applied to the connecting member is released, whereby the connecting member is permitted to rotate and the ruler is moved thereafter. It becomes possible.

In the configuration in which the restricting portion is formed on the pressing member, the pressing force applied to the connecting means in the rotation-restricted state is always kept constant, thereby effectively avoiding the deformation factor of the connecting means. At the same time, the connection means is also prevented from falling off from the pressing area by the pressing member, and the connection means can be always positioned on a certain circuit path, so that no malfunction occurs when restricting the circuit movement.

In the configuration in which the movable member is constituted by the lever, it is sufficient to move the free end side by the hinge structure, and the operability is improved, and the pressing force can be transmitted to the pressing member by the feed screw shaft structure. In addition, the amount of lever operation can be reduced, and operability is also improved from this point.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic perspective view of an entire drafting apparatus to which the stopper according to the present embodiment is applied, and FIG. 2 shows a schematic internal configuration thereof. FIG. 3 shows FIG.
FIG. 4 is an enlarged cross-sectional view taken along line AA of FIG. In these drawings, a drafting apparatus 10 includes a magnet type drafting plate 11.
A frame 12 fixed to each of the left and right sides of the drawing board 11 in the drawing; a pair of sliders 13 movably provided along the frame 12;
An endless wire 14 as a connecting means looped so as to physically maintain the same movement amount of the slider 3, a ruler 16 supported between the sliders 13, and mounted on the frame 12 at a position outside the slider 13. Protection pen 17, a pen tray 18 mounted along the front end face of the drawing board 11, and a pen tray 18 mounted on the front end face 18 </ b> A of the pen tray 18 so as to regulate the rotation of the endless wire 14. A stopper 19 is provided.

As shown in FIG. 3, the frame 12 has a vertical surface portion 20 abutting on a side end surface of the drafting board, and projects substantially horizontally outward from an upper end and a lower end of the vertical surface portion 20. Upper surface part 2 provided in parallel with each other
1 and a lower surface portion 22; a fixing surface portion 23 projecting from the vertical surface portion 20 on the opposite side to the lower surface portion 22 to form a surface for fixing the entire frame 12 to the drafting board 11; It is provided with a ridge 25 projecting upward from the middle and acting as a guide path extending linearly in a direction perpendicular to the paper surface of FIG.

The amount of protrusion of the lower surface 22 is set to be longer than the amount of protrusion of the upper surface 21 so that a certain amount of space for moving the slider 13 is provided.
Is inclined slightly upward and outward.
The distal end edge of the lower surface portion 22 is an engagement edge 26 having a substantially circular cross section, and the protection cover 17 is engaged along the engagement edge 26 so that the protection cover 17 can be detachably attached. It has become.

As shown in FIGS. 2 to 4, brackets 28 each having a substantially L-shaped side surface are fixed to both sides of the upper surface of the lower surface portion 22 in the longitudinal direction. The brackets 28 are provided with upright shafts 29, and pulleys 30 of two types are rotatably supported on the shafts 29, as shown in FIG. ing. Although not shown here, any one of the brackets 28 is provided so as to be slightly movable along the longitudinal direction of the frame 12 and adjusts the tension of the endless wire 14 described later. Can be done.

The pulley 30 has an endless wire 1 as described above.
4 is wound around the endless wire 14 by fixing the slider 13 to a fixed point P shown in FIG. It is possible to move the same distance in the same direction without interfering with each other. In this embodiment, the endless wire 14 is connected to the frame 1
2 and the pulley 3 on the near side in FIG.
It is wrapped around the inside of the pen tray 18 between zero.

As shown in FIG. 3, the slider 13 includes a plate-like slide member 35 arranged in parallel with the vertical surface portion 20 of the frame 12, and a roller 36 rotatably supported by the slide member 35. , And a pin 37 for fixedly connecting the endless wire 14. The roller 36 is provided so as to roll on the upper end surface of the ridge 25, whereby the slider 13 can move along the ridge 25. One side 38A of a substantially L-shaped bracket 38 for supporting a ruler is provided on the outer surface of the slider 13.
Are connected via an appropriate hinge structure, and the other end 38A of the bracket 38 is connected to the lower surface side of the holding member 40 located at both ends of the ruler 16, whereby the ruler 1
6 and each slider 13 are connected to ensure an integrated parallel movement.

As shown in FIGS. 3 and 4, the protective cover 17 has an elongated piece 50 having substantially the same length as the frame 12 and a concave portion formed on the lower edge of the piece 50. The groove 51 is provided. Flaky part 50
Has a slightly gently arcuate vertical cross-sectional shape, is provided with an upper end side bent inward, and a reinforcing rib 52 is formed at a substantially central portion in the vertical direction. On the other hand, the concave groove 51 is formed so as to form a circular space shape corresponding to the outer shape of the engaging edge 26 formed in the frame 12. This groove 51
Is formed over the entire length of the protective cover 17, whereby the protective cover 17 is slid in the direction shown by the arrow B in FIG. 4 so that the engagement edge 26 and the concave groove 51 can be engaged with each other. The protective cover 17 is attached to the frame 12.

When the protective cover is attached to the frame 12, as shown in FIGS. 1 and 4,
Caps 53 are attached to both ends. This mounting can be performed by tightening and fixing a bolt 54 to the bracket 28 fixed to the lower surface portion 22 of the frame 12.

As shown in FIGS. 5 to 7, in the present embodiment, the stopper 19 is mounted on a front end face 18A along the endless wire 14 extending into the pen tray 18. The stopper 19 includes a stationary member 61,
The stationary member 61 is provided with a lever 62 as a movable member detachably provided.

The stationary member 61 is, as shown in FIG.
A stepped hole 65 penetrating vertically, and the stepped hole 65
A protruding ridge 66 formed on the right side of the protruding portion 66 and an engaging protruding piece 68 (see FIG. 8) protruding inward from a side wall 67 of the stationary member 61 on the further right side of the protruding portion 66. It is provided with. The lever 62 side of the stationary member 61 is formed in a gentle arc shape inward as shown in FIG. 5, so that the free end side of the lever 62 can be received.

On the other hand, the position of the lever 62 opposite to the stationary member 61 is defined as a fulcrum side, and the stationary member 61 side is a free end. When the free end is engaged with the stationary member 61, the lever 62 is
The position where the engagement is released and moved in the direction indicated by the two-dot chain line in FIG. 5 is referred to as the rotation restricting position. A stepped hole 71 penetrated up and down is formed on the fulcrum side of the lever 62, and an engaging projection 68 formed on the stationary member 61 is fitted on the free end side end surface with a click operation. Mating recess 72 (see FIG. 8)
Are formed.

As shown in FIG. 6, the stepped hole 71 is
A large-diameter hole 71A located on the lower side, a small-diameter hole 71B continuing upward from the large-diameter hole 71A, and a small-diameter hole 71B connected to the small-diameter hole 71B and having a slightly larger inner diameter than the small-diameter hole 71B. It is provided in a shape provided with a small diameter hole 71C. A knurl 75 is provided in the large-diameter hole 71A so as to be inserted therein. The knurl 75 is engaged with a rib 74 formed along the inner surface axial direction of the large-diameter hole 71A to prevent movement in the rotation direction. It is provided to be.

As shown in FIG. 7, an inner screw 79 is formed in the center axis direction of the knurl 75. The inner screw 79 has a bolt 7 inserted into the stepped hole 71.
7 is screwed. At this time, a gap is formed between the bolt 77 and the small-diameter hole 71B, and the lever 62 is rotatable relative to the bolt 77. In addition, knurl 7
A pair of pressing members 80 and 81 formed in a plate shape are inserted on the outer peripheral side of the bolt 77 further projecting from
The top end of the bolt 77 is screwed into a cap nut 84 fixed to the bracket 83, and the tightening position is kept constant.
Therefore, when the free end side of the lever 62 is rotated between the above-described non-rotational restriction position and the rotation restriction position, the large-diameter hole 71 is rotated.
Since the knurl 75 is engaged with the rib 74 formed on the inner peripheral surface of A, the knurl 75 moves in the axial direction by the feed screw shaft structure. The bracket 83
Are fixed to the frame 12 via fixing screws (not shown).

As shown in FIG. 7, the pressing members 80 and 81 have inclined portions 80A and 81A as regulating portions provided so that both end portions along the extending direction of the endless wire 14 face each other. These inclined portions 80A and 81A abut against each other when the lever 62 is at the rotation restricting position to apply a constant pressing force while avoiding an excessive pressing force on the endless wire 14. Then, when the lever 62 is placed at the non-rotationally-restricted position, the endless wire 14 is prevented from falling off from the pressing area formed between the pressing members 80 and 81.

Reference numeral 56 in FIG. 3 denotes a spacer block.
Can be inclined with respect to a surface such as a table.

Next, the method of assembling the drafting apparatus 10 and the method of operating the stopper 19 in the above embodiment will be described in detail.

First, in order to assemble the drafting apparatus 10, first, the frames 12 are provided on the left and right sides of the completed drafting board 11.
Are fixed respectively. This fixing is carried out by aligning the fixing surface portion 23 of the frame 12 with the lower surfaces of both ends of the drawing board 11 and using bolts (not shown). At this time, a bracket 28 is fixed to the lower surface 23 of the frame 12, and a pulley 30 is mounted on a shaft 30 provided on the bracket 28.

After the fixing of the frame 12 is completed in this way, the pen tray 18 is placed along the front end face of the drawing board 11, and the left and right ends of the pen tray 18 are connected via bolts 55 as shown in FIG. Fixed surface portion 23 of frame 12
Fixed to

Next, the endless wire 14 is wound around each of the pulleys 30 in the manner shown in FIG. In this state, the endless wire 14 extending between the pulleys 30 located on the near side extends into the space on the near side of the pen tray 18 as shown in FIG. There is no. And the endless wire 14
Slider 13 along projection 25 acting as a guideway
And at a fixed point P in FIG. At this time, the ruler 16 is connected to the slider 13 via the bracket 38 and the holding member 40. The endless wire 14
Is carried out, the position of the pulley supporting bracket 28, which is movable along the longitudinal direction of the frame 12, is adjusted, whereby the wire is stretched without slack.

Thereafter, the protective cover 17 is mounted on the frame 12. As shown in FIG. 4, this mounting is performed by abutting one end of the protective cover 17 against one end of the frame 12 and engaging the engaging edge 26 on the frame 12 with the protective cover 1.
The groove 51 on the 7 side is aligned on the same axis, and the protective cover 17 is slid in the longitudinal direction in this state. After the mounting of the protective cover 17, the caps 53 are fixed to both ends of the frame 12 and the protective cover 17, respectively, whereby the assembly of the entire drafting apparatus 10 is completed.

Next, the operation of the stopper will be described.

Here, as an initial state, it is assumed that the lever 62 is engaged with the stationary member 61 as shown in FIG. In this state, the knurl 75 has reached the upper limit, so that the stationary members 80 and 81 are separated without preventing the endless wire 14 from rotating, and the ruler 1
6 allows smooth movement.

When the movement of the ruler 16 is to be restricted, the lever 6 is moved to the rotation restricting position shown by a two-dot chain line in FIG.
2 is rotated. Then, the knurl 75 attempts to rotate by the rotation of the lever 62, but the knurl 7
5 moves downward because it is engaged with the rib 74 formed in the large diameter hole 71A of the lever 62. At this time, the distance between the pair of pressing members 80 and 81 is relatively narrowed. At this time, a pressing force is applied to the endless wire 14 on the relative surfaces of the pressing members 80 and 81, and thereby the ruler 1
6 is restricted. At this time, the pressing member 80,
Since the inclined portions 80A and 81A of 81 abut each other,
In this state, the pressing force applied to the endless wire 14 is maintained at a constant pressure.

Therefore, according to this embodiment, since the stopper 19 is configured to be operated by lever operation, the operation is greatly simplified as compared with the conventional screw-type pressing structure. Can be

Further, since the knurl 75 can be moved in the axial direction by the feed screw shaft structure with respect to the rib 74 provided in the large diameter hole 71A of the lever 62, the screw pitch of the bolt 77 and the inner screw 79 is relatively small. By making the knurl 75 large, high-speed feeding of the knurl 75 can be realized, and the amount of turning operation of the lever 62 can be reduced, so that operability can be further improved.

Further, the pressing members 80 and 81 have inclined portions 8.
0A and 81A are formed, and these inclined portions 80A and 81A are formed.
Since the excessive pressing force is not applied to the endless wire 14 in the state where A is in contact with each other, the risk of the endless wire 14 being damaged such as crushing can be avoided beforehand.

In addition, since the inclined portions 80A and 81A allow the endless wire 14 to be always positioned in the pressing area between the pressing members 80 and 81, the lever 62 is always kept without the endless wire 14 coming out of the pressing area. There is an effect that predetermined turning regulation can be realized by the turning operation of, and malfunction can be reliably prevented.

Further, since the lever 62 is configured to be able to engage with the stationary member 61 by a click operation, the engagement completion state of the lever 62 can be confirmed by a sound, while a constant disengagement force is applied. Since the engaged state can be maintained as long as the lever 62 is not given, the risk of the lever 62 being inadvertently moved to the rotation restricting position can also be effectively avoided.

In the above embodiment, the slider 13
May be configured to move in the left-right direction of the drawing board 11 in addition to moving in the front-back direction of the drawing board 11. In applying the present invention, the mounting position of the stopper 19 is not limited as long as a predetermined pressing force can be applied at any position along the revolving position of the endless wire 14.

Although a pair of the pressing members 80 and 81 have been illustrated and described, at least one pressing member is sufficient.
In this case, the lower end surface of the knurl 75 or the knurl side surface of the bracket 83 will act as a pressing surface cooperating with one pressing member. Further, the pressing member 8
Inclined portions 80A, 8 as restriction portions formed at 0, 81
Even if 1A is provided on either one, it is possible to prevent falling off, and it is of course possible to provide a separate cushioning material on the relative surface of the pressing members 80 and 81 for preventing the endless wire 14 from being crushed.

Further, the connecting means is not limited to the endless wire 14, but may be made of various materials as long as a constant tensile strength can be maintained.
Further, a belt-like connecting means or the like can be used instead.

Further, as the movable member, in addition to the rotary type lever 62, a linear type movable member may be employed. In this case, it is possible to obtain a pressing force on the endless wire 14 by interposing an appropriate force conversion mechanism.

[0050]

The present invention is configured as described above, and
According to this, according to this, a pressing force can be applied to the connecting member made of an endless wire or the like by a one-touch operation, and the movement of the ruler can be always regulated with a constant pressing force. It is possible to provide a ruler stopper exhibiting an unprecedented excellent effect that long-term use is possible while preventing deformation of the connecting member.

[Brief description of the drawings]

FIG. 1 is an overall schematic perspective view showing an embodiment of a drafting apparatus according to the present invention.

FIG. 2 is a schematic configuration diagram showing a way of winding a wire connected to a slider in the embodiment.

FIG. 3 is an enlarged sectional view taken on line AA of FIG. 1;

FIG. 4 is an exploded perspective view of a main part in the embodiment.

FIG. 5 is a front view of a stopper according to the embodiment.

FIG. 6 is a sectional view taken along line BB of FIG. 5;

FIG. 7 is an enlarged sectional view taken along line CC of FIG. 6;

FIG. 8 is a rear view showing a state where the stationary member and the movable member of the stopper are engaged with each other.

FIG. 9 is a schematic perspective view showing an example of a ruler stopper in a conventional drafting apparatus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 drafting apparatus 11 drafting plate 12 frame 13 slider 14 endless wire 16 as connecting means 16 ruler 61 stationary member 62 lever as movable member 80 pressing member 81 pressing member 80A inclined portion as regulating portion 81A inclined portion as regulating portion 81A

Claims (3)

(57) [Claims] 1. A ruler moving slider provided movably along both sides of a drafting board, and endless connecting means connected to these sliders for holding the same amount of movement of each slider. In a ruler stopper provided so as to restrict the rotation of the connecting means by applying a predetermined pressing force to the connecting means, at a predetermined position along the circulating direction of the connecting means, a rotation restricting position and a non-rotating control. A movable member movably provided between the movable member and the movable member, and a pressing member capable of pressing the connecting means in accordance with the movement of the movable member. A ruler stopper characterized in that the pressing member presses the connecting means, and the pressing member is releasably provided when the pressing member is at the non-rotational control position. 2. The pressing member according to claim 1, wherein the pressing member holds a pressing force of the connecting means at a constant level, and has a restricting portion for preventing the connecting means from dropping out of a pressing area by the pressing member. Ruler stopper described. 3. The movable member includes a lever rotatably provided with one end as a fulcrum, and a free end of the lever is provided so as to be engaged with a stationary member adjacent to the lever by a click operation. The ruler stopper according to claim 1, wherein the turning force of the lever is provided so as to be transmitted to the pressing member via a feed screw shaft structure.