JPH11314419A - Recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance workability of fixing work, when a half-tees belt is employed in a timing belt for moving the carriage in a recorder, by putting a mark indicating the coupling part of the carriage on a specified position of the timing belt. SOLUTION: A mark M indicating the coupling part of the fixing part 7 of a carriage 6 is put on the inner surface of a timing belt 1 entrained about a toothed drive pulley 3 and a driven pulley 4. The mark M has a pair of protrusions 81, 82 of same length P2 as one pitch P1 of two ridges 12, 12 of a toothed part 1A, and recesses 91-93 between them. The recess 91-93 has same shape and size as those at the bottom 13 of the toothed part 1A. The timing belt 1 runs in forward and reverse direction only in the running range S.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus such as a printer, and more particularly to a timing at which a reciprocating movement of a carriage on which a recording head such as an ink jet system is mounted is wound around a driving pulley and a driven pulley. The present invention relates to a recording apparatus which is designed to perform the operation by forward and reverse running of a belt.

[0002]

2. Description of the Related Art Conventionally, a recording belt of this type is roughly divided into a timing belt 1 in which an entire area of an inner surface is a toothed portion 1A as shown in FIG. 7 and a timing belt 1 as shown in FIG. A timing belt 1 called a half tooth belt in which an inner surface is divided into a toothed portion 1A and a toothless portion 1B has been used. These timing belts 1 are wound around a driving side pulley 3 and a driven side pulley 4 as shown in FIGS. 7 and 8, and driven by a rotary driving source 5 such as a pulse motor. The vehicle travels forward and backward at a fixed position through the forward and reverse rotations (arrow R). Further, as shown in the drawing, the driving pulley 3 employs a toothed pulley to reliably transmit its rotation to the timing belt 1, whereas the driven pulley 4 generally has a toothed portion. No pulley is adopted.

As shown by imaginary lines in FIGS. 7 and 8, a carriage 6 to which a recording head (not shown) employing an ink jet system or the like is mounted at a predetermined position of the timing belt 1. It is mounted via a mounting part 7 provided integrally. The carriage 6 attached to the timing belt 1 travels in the forward / reverse direction together with the recording head by forward / reverse travel of the timing belt 1, and the traveling range S of the carriage 6 at that time is as follows.
A predetermined position is maintained by a travel range control device (not shown).

In a recording apparatus employing the timing belt 1 shown in FIG. 7 in which the entire area of the inner surface is a toothed portion 1A, the timing belt 1 has a peak portion 12 of the toothed portion 1A and a driven pulley. As the carriage 6 travels while always in contact with the carriage 4, vibrations are likely to occur in the moving carriage 6, and abrasion dust of the timing belt 1 is generated due to friction between the driven pulley 4 and the peak 12. Was.

On the other hand, in a recording apparatus employing the timing belt 1 shown in FIG. 8, the timing belt 1 has a toothed portion 1A in a winding area around the toothed driving pulley 3, and the timing belt 1 Tooth missing part 1B in winding area
, The carriage 6 as described with reference to FIG.
No vibration of the timing belt 1 and no generation of wear dust on the timing belt 1 occur.

However, the timing belt 1 shown in FIG.
, The shape of the many peaks 12 and the shape of the many valleys 13 of the toothed portion 1A are the same,
The mounting portion 7 of the carriage 6 is connected to the timing belt 1 by utilizing the shapes of the peaks 12 and the valleys 13 of the toothed portion 1A. Therefore, the connecting portion of the mounting portion 7 of the carriage 6 may be mistaken, and if the connecting portion of the mounting portion 7 is mistaken, the running range S of the carriage 6 is shifted from a predetermined position, and the toothed prime mover is formed. When the timing belt 1 is driven by the driving of the side pulley 3, the peak 1 of the toothed portion 1A is sometimes provided as shown in FIG.
2 may get on the driven pulley 4. When such a situation occurs, stability during movement of the carriage 6 is impaired, causing a malfunction in its operation,
The missing tooth portion 1B is wound around the toothed driving pulley 3, and the torque transmission force is reduced or a control failure is caused.

On the other hand, JP-A-2-263677, JP-A-2-305675, JP-A-3-1972, and the like suggest that a mark indicating a mounting portion of a carriage is attached to a timing belt. . In this example, as shown in FIG. 10, a protrusion 14 bulging outward is formed at a predetermined position on the outer surface of the timing belt 1, and the protrusion 14 is formed.
Can be used as a mark. FIG.
As shown in FIG. 7, the mounting portion 7 of the carriage 6 mounted on the timing belt 1 includes a pair of upper and lower holding plate portions 71 and 72 for holding the timing belt 1 and the upper holding plate portion 71. The concave / convex portion 73 that meshes with the peak portion 12 and the valley portion 13 of the timing belt 1 is formed, and a concave portion 74 into which the protruding portion 14 fits is formed in the lower holding plate portion 72. Then, as shown by an arrow a in FIG. 11, using the protrusion 14 as a mark, the portion of the timing belt 1 where the protrusion 14 is provided is inserted between the upper and lower holding plate portions 71, 72 of the mounting portion 7. As shown in FIG. 12, the mounting portion 7 is connected to an appropriate portion of the timing belt 1 so that the carriage is mounted on the timing belt.

[0008]

However, FIG.
In the timing belt 1 shown in FIG. 1, since the projecting portion 14 serving as a mark is formed outside the timing belt 1, the lower traveling portion of the upper traveling region U and the lower traveling region D of the timing belt 1 is formed. An inconvenience arises when it is necessary to mount the carriage in area D. That is, when attaching the carriage to the timing belt 1, FIG.
As shown by the arrow E, the operator may be forced to insert a predetermined portion of the timing belt 1 into the mounting portion 6 while looking at the mounting portion 7 of the carriage 6 and the timing belt 1 from above. However, in many cases, the projecting portion 14 serving as a mark is difficult or invisible for a worker, which may be a factor of reducing workability.

Further, when the projection 14 is provided on the outer surface side of the timing belt 1, there is a problem that the cost for manufacturing a mold for molding the timing belt 1 is high.

Further, the mounting portion of the carriage mounted on the timing belt 1 shown in FIG. 10 is attached to the lower holding plate 72 as shown in FIG.
It is necessary to form a recess 74 into which the projection 14 is fitted. Therefore, if this attachment portion 7 is connected to the timing belt 1 as described in FIGS. 7 and 8, the recess 74 formed in the lower holding plate portion 71 as a space 75 as shown in FIG. Therefore, a reliable connection state cannot be obtained. For this reason, in the recording apparatus employing the timing belt 1 of FIG. 10, it is always required that the carriage attached to the timing belt 1 is provided with the specially-shaped mounting portion 7 as described in FIG. There is a problem that the carriage attachable to the timing belt 1 described with reference to FIGS. 7 and 8 cannot be diverted, and the structure of the carriage must be changed.

The present invention has been made in view of the above circumstances and problems, and is based on the use of a half tooth belt for the timing belt. Recording that enables the operator to attach the carriage to the timing belt with good workability while looking at the mounting portion of the carriage and the timing belt from above, and to reduce the manufacturing cost of the mold for molding the timing belt. It is intended to provide a device.

Another object of the present invention is to provide a recording apparatus provided with a timing belt to which a carriage attachable to the timing belt described with reference to FIGS. 7 and 8 can be diverted and attached.

[0013]

A recording apparatus according to the present invention is wound around a toothed driving pulley and a driven pulley, and an inner surface of a winding area around the driving pulley is attached to the driving pulley. A timing belt having a toothed portion that meshes with the inner surface of a winding region with respect to the driven pulley, and a toothless portion; a carriage on which a recording head is mounted; and a mounting provided on the carriage and coupled to the timing belt. And a recording device having
A mark is provided on the inner surface of the timing belt to indicate a joint portion of the attachment portion, and the mark has a concave-convex shape different from the concave-convex shape formed by the peak portion of the toothed portion and the continuous valley portion. It is that.

With this configuration, when it is necessary to attach the carriage to the lower traveling area of the timing belt,
The operator can easily see the mark of the timing belt from above. Therefore, the timing belt can be securely and easily connected to the mounting portion of the carriage with good workability while viewed from above.

In the recording apparatus according to the present invention, the mark has a length including two adjacent peaks of the toothed portion and is formed at the same height as the peaks. , And at least one concave portion formed between the pair of convex portions and having the same shape and size as the valley portion of the toothed portion. It is possible.

Here, the "length including two adjacent peaks of the toothed portion" is a length equal to or longer than a length corresponding to one pitch of the peaks of the toothed portion. When the length of the protruding portion is set as described above, it is easy to distinguish the crest portion of the toothed portion from the eye, and the effect as a mark is remarkably exhibited. If the length of the protruding portion is shorter than the length including two adjacent peak portions of the toothed portion, it is difficult to distinguish the toothed portion from the toothed portion when viewed with eyes. A convex portion having an appropriate length is excluded from the convex portion as a component of the mark.

In the recording apparatus having the above configuration, a pair of projections provided on a mark provided on the timing belt fill one valley of the toothed portion and continuously form a pair of ridges on both sides of the valley. The concave portion has the same shape and size as the valley portion of the toothed portion. With such a mark, the manufacturing cost of a mold for forming the mark is lower than in the case where the mark is formed in an irregular shape on the outer surface of the timing belt. Further, the carriage provided with an attachment portion that can be coupled to the mark can be attached to the timing belt shown in FIGS. 7 and 8. Therefore, the carriage attachable to the timing belt described with reference to FIGS. 7 and 8 can be diverted and attached as it is. This operation will be described in more detail in an embodiment described later.

In the recording apparatus according to the present invention, the mark is a projection having the same shape and size as the peak of the toothed portion, and the projection and the peak at the end of the toothed portion. And a recess having a length including two adjacent valleys of the toothed portion and formed between the valleys and the same depth. You may.

Here, the "length including two adjacent valleys of the toothed portion" is a length equal to or longer than one length corresponding to one pitch of the valleys of the toothed portion. When the length of the concave portion is set as described above, it is easy to visually recognize the valley portion of the toothed portion, and the effect as a mark is remarkably exhibited. If the length of the concave portion is shorter than the length including the two adjacent valleys of the toothed portion, it is difficult to discriminate the valley of the toothed portion from the eye, so that The concave portion having the length is excluded from the convex portion as a constituent requirement of the mark.

Preferably, the mark is provided at an end of the toothed portion of the timing belt. In the timing belt, the toothed portion is wound around the driving pulley and the toothless portion is formed. It is desirable that forward and reverse traveling can be performed at a fixed position only within a range wound around the driven pulley. In this case, the situation described with reference to FIG. 9, that is, the peak portion of the toothed portion rides on the driven pulley and the stability during movement of the carriage is impaired, or the toothed driving pulley A situation in which the missing tooth portion is wrapped and the torque transmission force is reduced or causes a control failure does not occur.

[0021]

FIG. 1 is a front view showing a timing belt 1 and the like used in a recording apparatus according to an embodiment of the present invention, FIG. 2 is an explanatory view of a carriage attaching operation to a timing belt 1 according to a modification, and FIG. FIG. 4 is a partially cutaway front view showing a main part of the timing belt 1 shown in FIG. 2 in a state where the timing belt 1 is connected to a mounting portion 7 of the carriage. FIG. FIG. 5 is a partially cutaway front view showing a main part in a state where the timing belt 1 according to still another modification is coupled to a mounting part 7 of a carriage. FIG.

Each of the timing belts 1 shown in FIGS. 1 to 5 has a toothed portion 1A formed on a half circumferential portion of the inner surface thereof and a toothless portion 1B formed on the other half circumferential portion.
As can be seen from FIG.
The toothed portion 1A is assigned to a winding area for
A winding area around the driven pulley 4 is assigned to the toothless portion 1B. In other words, the timing belt 1 has a regular position as shown by an arrow R at a fixed position only in a range S where the toothed portion 1A is wound around the toothed driving pulley 3 and the toothless portion 1B is wound around the driven pulley 4. It is possible to run. The traveling range S of the timing belt 1 is as follows.
A pulse range motor or the like for rotating the pulley 3 on the toothed driving side by the action of a traveling range restricting device having a function of restricting the position of the movement limit of the carriage 6 or the mounting portion 7 attached to the timing belt 1. It is possible to determine an appropriate position by electrically controlling the amount of rotation of the rotary drive source 5 or the like. If the traveling range S of the timing belt 1 is determined as described above, the driven pulley 4 as described with reference to FIG. A situation in which the peak portion 12 of the tooth portion 1A runs up does not occur.

On the inner surface of the timing belt 1, there is provided a mark M having an uneven shape located at the end of the toothed portion 1A. The mark M indicates a connecting portion of the mounting portion 7 of the carriage 6, and the concave and convex shape is the peak 12 of the toothed portion 1 </ b> A of the timing belt 1 and the valley 13 continuous with
Is different from the concavo-convex shape formed by Next, some examples of the uneven shape of the mark M will be specifically described.

The mark M shown in FIG. 1 is a pair of convex portions 81 and 82 formed in the same shape and size and the convex portions 8
1, 82, three recesses 91, 92,
93. The length P2 of each of the pair of convex portions 81 and 82 is equal to the length of the adjacent toothed portion 1A.
A peak 1 having a length P1 between two peaks 12, 12
It has the same length as one pitch of 2, 12 (P1 = P
2). The height H2 of each of the projections 81 and 82 is the same as the height H1 of the peak 12 (H1 = H).
2). The shape and size of each of the three recesses 91, 92, and 93 are the same as the shape and size of the valley 13 of the toothed portion 1A.

A mark M shown in FIGS. 2 and 3 is a pair of convex portions 83 and 84 formed in the same shape and size, and two concave portions formed between the convex portions 83 and 84. 9
4,95. As shown in FIG.
The length P3 of each of the peaks 3, 84 is the same as one pitch of the peaks 12, 12, which is the length P1 between two adjacent peaks 12, 12 of the toothed portion 1A. (P1 = P3). The height H3 of each of the projections 83 and 84 is the same as the height H1 of the peak 12 (H1 = H3). In addition, the shape of the two concave portions 94 and 95
The size is the same shape and size as the valley 13 of the toothed portion 1A.

A mark M shown in FIG. 4 indicates a pair of convex portions 85 and 86 formed in the same shape and size and the convex portions 8 and 86.
5, 86 and one recess 96 formed between them. In addition, the length P4 of each of the pair of convex portions 85 and 86 is equal to the length of the two adjacent peak portions 12 of the toothed portion 1A.
12 have the same length as one pitch of the peaks 12, 12, which is the length P1 between them (P1 = P4). The height H4 of each of the projections 85 and 86 is the same as the height H1 of the peak 12 (H1 = H4). Further, the shape and size of one concave portion 96 are determined by the valley portion 13 of the toothed portion 1A.
It has the same shape and size as.

The mark M shown in FIG. 5 is a single protrusion 87 having the same shape and size as the peak 12 of the toothed portion 1A.
And the convex portion 87 and the peak portion 12 at the end of the toothed portion 1A.
a with a concave portion 97 formed between the first and second portions. Recess 9
The length L2 of the valley portion 13 is a length L1 including two adjacent valley portions 13 of the toothed portion 1A.
It has the same length as the pitch (L1 = L2). Also,
The depth D2 of the recess 97 is the same as the depth D1 of the valley 13 (D1 = D2).

Each of the timing belts 1 described with reference to FIGS. 1 to 5 has a mark M on its inner surface. Therefore, FIG.
When it is necessary to attach the carriage to the lower traveling area D (see FIG. 10) of the timing belt 1, as shown in FIG. Mark M when viewing 1 from above
The timing belt 1
It is possible to easily and reliably perform the work of inserting the portion marked with the mark M into the mounting portion 6 as shown by the arrow a.

As shown by the mark M described with reference to FIGS. 1 to 4, the lengths P2, P3, and P4 of the projections 81 to 86 are two adjacent ones.
The heights H2, H3, and H4 are the same as the height H1 of the ridges 12.
When the shape and size of the concave portions 91 to 96 are the same as the shape and size of the valley portion 13, the mold for molding the mark M has the mark M. It can be manufactured by simply cutting and removing a predetermined convex forming surface for forming a valley provided in a mold for forming a timing belt which is not formed, so that the manufacturing cost is reduced. The same can be said for the mark M described with reference to FIG.

The mounting portion 7 shown in FIGS. 2 to 4 is provided with a concave / convex portion 73 having a shape corresponding to the concave / convex shape of the mark M on the holding plate 71 on the upper side thereof. The lower holding plate portion 72 is disposed to face. When a portion of the timing belt 1 with the mark M is inserted into these mounting portions 7, the portion is connected to the mounting portion 7 and the carriage is mounted on the timing belt 1. Since the mounting portion 7 having the structure shown in FIGS. 2 to 4 does not have the recess 74 in the lower holding plate portion 72 as shown in FIG. 11, the mounting portion 7 will be described with reference to FIGS. The timing belt 1 can also be used. That is, as shown in FIG. 6, when the timing belt 1 is inserted into the mounting portion 7,
The peaks 12 and the valleys 13 of the timing belt 1 are fitted into the concave and convex portions 73 of the upper holding plate 71, and the entire lower holding plate 72 contacts the outer surface of the timing belt 1 to ensure reliability. A join is made. The same can be said for the mounting portion 7 for connecting the timing belt 1 of FIG. Therefore, the carriage attachable to the timing belt described with reference to FIGS. 7 and 8 can be diverted and attached to the timing belt 1 shown in FIGS.

The specific shape of the mark M of the timing belt 1 used in the recording apparatus according to the present invention is not limited to those described with reference to FIGS. For example, in the mark M shown in FIGS. 1 to 4, the lengths P2, P3, and P4 of the protrusions 81 to 86 provided in the mark M are two adjacent two of the toothed portion 1A of the timing belt 1. Yamabe 12,1
It may be longer than the length P1 including 2. In the mark M shown in FIG. 5, the length L2 of the concave portion 97 may be longer than the length L1 between the two valleys 13, 13.

In FIGS. 1 to 6, FIGS.
Where the same or corresponding parts are indicated,
7 to 13 are denoted by the same reference numerals.

[0033]

According to the recording apparatus of the present invention, since a half tooth belt is used for the timing belt, vibration of the carriage 6 and generation of wear dust which may occur when the timing belt of FIG. Absent.

Further, when it is necessary to attach the carriage to the lower traveling area of the timing belt, the operator can attach the carriage to the timing belt with good workability while viewing the attachment portion of the carriage and the timing belt from above. As a result, the production cost of the mold for molding the timing belt can be reduced.

In particular, according to the first and second aspects of the present invention, there is an advantage that the carriage attachable to the timing belt described with reference to FIGS. 7 and 8 can be diverted as it is.

[Brief description of the drawings]

FIG. 1 is a front view showing a timing belt and the like used in a recording apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a carriage attaching operation to a timing belt according to a modified example.

FIG. 3 is a front view showing a part of the main part of the timing belt of FIG. 2 in a state where the timing belt is connected to a mounting part of a carriage, partially cut away;

FIG. 4 is a front view showing a part of a main part in a state where a timing belt according to another modified example is coupled to a mounting portion of a carriage, partially cut away;

FIG. 5 is a front view showing a part of a main part in a state where a timing belt according to still another modified example is coupled to a mounting portion of a carriage, partially cut away;

FIG. 6 is a partially cutaway front view showing a mounting portion connected to a conventional timing belt.

FIG. 7 is a front view illustrating a timing belt used in a conventional recording apparatus.

FIG. 8 is a front view illustrating another timing belt used in a conventional recording apparatus.

FIG. 9 is a front view for explaining a problem of the timing belt of FIG. 8;

FIG. 10 is a schematic front view of a timing belt having marks.

FIG. 11 is an explanatory diagram of a carriage attaching operation to the timing belt of FIG. 10;

FIG. 12 is a partially cutaway front view showing a main part of the timing belt of FIG. 10 in a state where the timing belt is coupled to a mounting portion of the carriage.

FIG. 13 shows a conventional timing belt coupled to FIG.
FIG. 4 is a partially cutaway front view showing the mounting portion of FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 timing belt 1A toothed portion 1B toothless portion 3 toothed driving pulley 4 driven pulley 6 carriage 7 mounting portion 81 to 87 convex portion 91 to 97 concave portion M mark S Length between two peaks P2, P3, P4 Length of convex H1 Height of peak H2, H3, H4 Height of convex L1 Length between two valleys L2 Length of concave D1 Depth of valley D2 Depth of recess

Claims (4)

[Claims] An inner surface of a region wound around the toothed driving pulley and the driven pulley is formed with a toothed portion meshing with the driving pulley, and the inner surface of the winding region is meshed with the driving pulley. A timing belt in which the inner surface of the attached area is a toothless portion, a carriage on which a recording head is mounted, and a mounting portion provided on the carriage and coupled to the timing belt; On the inner surface, a mark indicating a joint portion of the mounting portion is provided, and the mark has an uneven shape different from the uneven shape formed by the peak portion of the toothed portion and the valley portion continuous thereto. A recording device characterized by the above-mentioned. 2. The method according to claim 1, wherein the mark is formed on two adjacent toothed portions.
A pair of convex portions having a length including two peak portions and formed at the same height as those peak portions, and a valley portion of the toothed portion formed between the pair of convex portions and 2. The recording apparatus according to claim 1, comprising at least one recess having the same shape and size. 3. The mark is formed between a convex portion having the same shape and size as the peak portion of the toothed portion, and between the convex portion and the extreme end portion of the toothed portion. 2. The recording apparatus according to claim 1, further comprising a concave portion having a length including two adjacent valley portions of the toothed portion and having the same depth as the valley portions. 4. The timing belt is provided at an end of a toothed portion of the timing belt, the toothed portion of the timing belt is wound around the driving pulley, and the toothless portion is driven by the driven tooth. 4. The recording apparatus according to claim 1, wherein the recording apparatus can travel forward and backward at a fixed position only within a range wound around the side pulley.