JPH0630181U - Electronic dobby - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to prevent overheating of the electromagnetic solenoid that swings the jack lever and prevent accumulation of fly cotton in the casing. A ventilation passage 2 that has a pair of electromagnetic solenoids 23a and 23b for swinging a jack lever 34 in a casing 25 and opens a gap 27 formed between the electromagnetic solenoids 23a and 23b to the outside of the casing 25.
In the electronic dobby having 8, the ventilation passage 28,
A fan 29 is provided to blow air to the jack lever 34 side through the electromagnetic solenoids 23a and 23b and the gap 27 between the electromagnetic solenoids 23a and 23b.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electronic dobby having an electromagnetic solenoid for rocking a jack lever connected to a heald frame of a loom, and more particularly to an electronic dobby for cooling the electromagnetic solenoid.

[0002]

[Prior art]

 An electronic dobby that raises and lowers a heald frame of a loom is known, and this electronic dobby uses an electromagnetic solenoid instead of a card type dobby to swing a jack lever connected to the heald frame. Specifically, it is configured as shown in FIGS.

As shown in the figure, in the casing 32, a jack lever 34 for connecting the end 33 a of the wire 33 and for pulling in the wire 33 is provided rotatably around a fixed shaft 35. When the jack lever 34 is not rotated at the position shown in the figure, the above-mentioned heald frame is held in the lowered (or raised) position, and when the jack lever 34 is rotated, the heald frame is moved via the wire 33. It is raised (or lowered). A V-shaped lever 37 is connected to the jack lever 34 via a lever ratio adjusting arm 36, and the V-shaped lever 37 is rotatably provided around a fixed shaft 38. A boke plate 2 having movable hooks 3a and 3b at both ends is connected to the dogleg lever 37 by a pin 39.

On the other hand, a reciprocating lever 42 that engages with the cam shaft 40a of the cam 40 and reciprocates in the direction of the arrow 41 shown in the figure by the rotation of the cam 40 is provided, and the reciprocating lever 42 is driven by a pin 43 at the front end thereof. The lever 44 is connected. Although not shown, the drive lever 44 is rotatably fixed to the casing 32 at the same position as the position of the pin 39 of the substantially dog-legged lever 37, and the pressing pieces 44a and 44b at both ends thereof are movable on the balk plate 2. The hooks 3a and 3b are provided so as to come into contact with the back surface on the opposite side.

In the casing 32, a pair of upper and lower holding hooks 46a and 46b having hook portions 45a and 45b respectively engaged with the movable hooks 3a and 3b of the balk plate 2 are rotatably supported by fixed shafts 47a and 47b, respectively. It is provided (the lower holding hook 46b is not shown).

A spring 48 is provided between the hooks 45a and 45b, and is urged to rotate the hooks 45a and 45b to a non-acting position where they are always in contact with the stoppers 49a and 49b. Action levers 51a and 51b are engaged with the holding hooks 46a and 46b through movable portions 50a and 50b that rotate the hook portions 45a and 45b between the operating position and the non-operating position.

The action levers 51a and 51b include engagement lever portions 52a and 52b engaged with the movable portions 50a and 50b, driven lever portions 54a and 54b operated by the drive cam 53, and action levers 51a and 51b. It is composed of attraction lever portions 55a and 55b made of a magnetic material for rotating to the action / non-action position. Electromagnetic solenoids 56a and 56b are arranged facing the suction lever portions 55a and 55b, respectively.

When raising and lowering the heald frame, first, by rotating the auxiliary cam 53, the suction lever portions 55a and 55b alternately move toward and away from the corresponding electromagnetic solenoids 56a and 56b, respectively, and the holding hooks 46a and 55b. 46b is rotated to the non-acting position where it is in the non-engaging state with the working position where the movable hooks 3a and 3b are engaged. At this time, if the electromagnetic solenoids 56a, 56b are energized, the hook portions 45a, 45b of the holding hooks 46a, 46b are held in the operating position, and if not energized, they are in the non-operating position.

For example, the rotation of the jack lever 34 when the upper holding hook 46a shown in the drawing is in the operating position will be described. When the reciprocating lever 42 is reciprocated by the cam 53 in the direction of the arrow 41 shown in the drawing, it is driven. The lever 44 is rotated. At this time, when the drive lever 44 is rotated counterclockwise from the state shown in the drawing, the hook portion 45a of the upper holding hook 46a and the movable hook 3a of the balk plate 2 are engaged with each other. The pin 2a connecting the movable hook 3a of is fixed, so that the rotational force of the drive lever 44 is transmitted from the pressing piece 44b to the balk plate 2, and the volk plate 2 is rotated counterclockwise about the pin 2a. Correspondingly, the dog-legged lever 37 connected by the pin 39 is rotated clockwise, and the jack lever 34 is pulled through the lever ratio adjusting arm 36 to draw in the wire 33 which is rotated clockwise to pull the heald frame. It will be lowered.

Next, when the reciprocating lever 42 moves in the opposite direction to the above, the lower movable hook 3b of the balk plate 2 has a holding hook 46b (not shown) below it, and when the holding hook 46b is in the operating position, Similarly, when the jack lever 34 is rotated and is in the non-acting position, the jack lever 34 is not rotated. That is, when the electromagnetic solenoids 56a and 56b are energized, the holding hooks 46a and 46b are in the operating position, and when the jack lever 34 is not energized, the holding hooks 46a and 46b are in the non-operating position, and the jack lever 34 is not rotated. Becomes

[0011]

[Problems to be solved by the device]

 By the way, when the electromagnetic solenoids 56a and 56b overheat, the performance of the electromagnetic solenoids 56a and 56b deteriorates. Therefore, there is a problem that the responsiveness of the jack lever 34 including the suction lever portions 55a and 55b is deteriorated. Further, as shown in FIG. 4, an insertion hole 57 for inserting the wire 33 is formed in the casing 32, and a ventilation port 58 is formed so as to face the insertion hole 57. Due to the overheating of the terminals 56a and 56b, the temperature of the insertion hole 57 side becomes low and the temperature of the vent hole 58 side becomes high. Therefore, there is a problem in that the insertion hole 57 side has a negative pressure, and the cotton wool on the loom side is sucked from the insertion hole 57 and accumulated in the casing 32.

The present invention was devised to effectively solve the above problems.

An object of the present invention is to provide an electronic dobby capable of preventing the performance of an electromagnetic solenoid that swings a jack lever from being deteriorated and preventing accumulation of fly cotton in a casing.

[0014]

[Means for Solving the Problems]

 The present invention relates to an electronic dobby having a pair of electromagnetic solenoids for swinging a jack lever in a casing and a ventilation passage for opening a gap formed between the electromagnetic solenoids to the outside of the casing. A fan is provided to blow air to the jack lever side through the gap between the solenoid and the electromagnetic solenoid.

[0015]

[Action]

 Since air is blown to the electromagnetic solenoid in this way, overheating of the electromagnetic renoid can be prevented. Therefore, the performance of the electromagnetic solenoid is not deteriorated. In addition, part of the blown air is supplied to the jack lever side through the gap between the electromagnetic solenoids, so it is possible to prevent the entire inside of the casing from becoming a positive pressure and the cotton dust being drawn into the casing.

[0016]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

In FIG. 2, the structure of the jack lever 34, the lever ratio adjusting arm 36, the dog-legged lever 37, the swing lever 44 and the reciprocating lever 42 driven by the cam 40 swinging the swing lever 44 is shown in FIG. Although not shown, it is as described in FIGS. 4 and 5, and the same components as those in FIGS. 4 and 5 are designated by the same reference numerals and the description thereof will be omitted.

In FIG. 2, reference numerals 1a and 1b denote holding hooks, and hook portions 4a and 4b that engage with the movable hooks 3a and 3b of the balk plate 2 (the lower movable hook 3b is not shown in the illustrated example), The hook portions 4a, 4b are composed of movable portions 5a, 5b for rotating the hook portions 4a, 4b into an operating position and a non-operating position, and these are provided rotatably on fixed shafts 6a, 6b, respectively. Springs 7a, 7b are provided between the movable parts 5a, 5b and the hook parts 4a, 4b, and the hook parts 4a, 4b always contact the stopper pieces 8a, 8b of the movable parts 5a, 5b to rotate integrally. It is designed to move. The movable parts 5a, 5b are provided with slide parts 10a, 10b, and the slide parts 10a, 10b are engaged lever parts 13a, 13b of the action levers 12a, 12b rotatably provided on the fixed shaft 11. Are slidably engaged with the grooves 14a and 14b.

The action levers 12 a and 12 b have driven lever portions 16 a and 16 b that face the engagement lever portions 13 a and 13 b and are rotated by the drive cam 15. The action levers 12a and 12b have operating portions 17a and 17b, and the operating portions 17a and 17b are provided with rotary shafts 18a and 18b, respectively, and the rotary shafts 18a and 18b extend rearward therefrom. Auxiliary levers 19a and 19b are provided as auxiliary arms.

Springs 20a, 20b for urging the auxiliary levers 19a, 19b toward the side opposite to the fixed shaft 11 side are provided between the operation portions 17a, 17b and the auxiliary levers 19a, 19b. Further, as shown in FIG. 1, engaging portions 22a and 22b are provided at the tip ends of the auxiliary levers 19a and 19b, and the engaging portions 22a and 22b are energized to the electromagnetic solenoids 23a and 23b in the operating position. At this time, the engaging pieces 24a and 24b are engaged. The electromagnetic solenoids 23a, 23b attract the auxiliary levers 19a, 19b by magnetic force to hold the action levers 12a, 12b in the working position, and are arranged between the upper and lower auxiliary levers 19a, 19b. There is. Stoppers 19c and 19d are provided on the respective auxiliary levers 19a and 19b, and these stoppers 19c and 19d restrict the rotation of the auxiliary levers 19a and 19b to the side opposite to the fixed shaft 11 side.

Therefore, when the drive cam 15 rotates, the driven lever portions 16a and 16b of the action levers 12a and 12b are alternately swung, and at the same time, the holding hooks 1a and 1b are poked through the engaging lever portions 13a and 13b. The plate 2 is alternately rotated to an operating position in which it engages with the movable hooks 3a and 3b and a non-operating position in which the plate 2 is disengaged. Furthermore, the auxiliary levers 19a and 19b reciprocate between the action and non-action positions together with the action levers 12a and 12b. When the action levers 12a and 12b are rotated to the action position, that is, when the upper action lever 12a is rotated from the non-action position in the solid line position to the action position in the alternate long and short dash line position, as shown in FIG. When the electromagnetic solenoid 23a is excited, the auxiliary lever 19a is attracted to and held by the electromagnetic solenoid 23a against the biasing force of the spring 20a as shown by the chain double-dashed line. At this time, the engaging portion 22a of the auxiliary lever 19a and the engaging piece 24a are engaged. The same applies to the lower action lever. As a result, the holding hooks 1a and 1b are held in the working position, engage with the movable hooks 3a and 3b of the poke plate 2, and raise (or lower) the above-mentioned hold frame.

In particular, a ventilation port 26 is opened in the side portion 25 a of the casing 25 facing the electromagnetic solenoids 23 a and 23 b so as to face the electromagnetic solenoids 23 a and 23 b, and the ventilation port 26 and the electromagnetic solenoids 23 a and 23 b are opened. A ventilation passage 28 is formed that connects the gap 27 between the ventilation passage 28 and the gap. The ventilation passage 28 is provided with a fan 29 that blows air to the electromagnetic solenoids 23a and 23b and blows to a gap 27 formed between the electromagnetic solenoids 23a and 23b. The fan 29 has a motor 29a built therein and is fixedly supported between the electromagnetic solenoids 23a and 23b and the vent hole 26.

The electromagnetic solenoids 23a and 23b are housed in the cover members 30a and 30b, respectively, and the cover members 30a and 30b are provided with separating portions 31a and 31b for separately introducing the air A sent from the cooling fan 27. The separating portions 31a and 31b are formed so as to be sequentially close to each other toward the fan 29 and form a gap 27 for guiding the wind A to the jack lever 32 side.

Therefore, the outside air is introduced into the ventilation passage 28 by the rotational driving of the fan 29, the introduced outside air is blown as cooling air to the electromagnetic solenoids 23a and 23b, and a part of the outside air is electromagnetic solenoid 23a, After passing through the gap 27 between the holes 23b, the positive pressure air is supplied to the jack lever 34 side. Therefore, both electromagnetic solenoids 23a and 23b can be cooled, and the inside of the casing 25 can be prevented from being sucked into the casing 25 from the loom side while being kept at a positive pressure.

As described above, according to the present invention, since the electromagnetic solenoids 23a and 23b are blown with air to cool them, overheating of the electromagnetic solenoids 23a and 23b can be prevented and the performance of the electromagnetic solenoids 23a and 23b can be deteriorated. Absent. Therefore, reliable swinging of the jack lever 34 can be ensured. Further, since the air is blown to the jack lever 34 side through the gap 27 formed between the electromagnetic solenoids 23a and 23b, it is possible to prevent the cotton wool from accumulating in the casing 25.

[0026]

[Effect of device]

 In short, according to the present invention, since the cooling fan blows air to the electromagnetic solenoid, overheating of the electromagnetic solenoid can be prevented, the performance of the electromagnetic solenoid can be prevented from deteriorating, and a part of the blowing air can be passed through the gap between the electromagnetic solenoids. Since it is supplied to the jack lever side, it is possible to prevent the fly cotton from accumulating in the casing.

[Brief description of drawings]

FIG. 1 is an enlarged view showing a main part of an electronic dobby of the present invention.

FIG. 2 is an explanatory diagram showing an entire electromagnetic dobby.

FIG. 3 is an enlarged view of essential parts showing an operating state of the electronic dobby.

FIG. 4 is an enlarged view showing a conventional electronic dobby.

5 is an enlarged view showing a main part of FIG.

[Explanation of symbols]

 34 Jack Lever 23a, 23b Electromagnetic Solenoid 25 Casing 27 Gap 28 Ventilation Passage 29 Fan

Claims (1)

[Scope of utility model registration request] 1. An electronic dobby having a pair of electromagnetic solenoids for swinging a jack lever inside a casing and having a ventilation passage for opening a gap formed between the electromagnetic solenoids to the outside of the casing. An electronic dobby having a fan for blowing air to the jack lever side through a gap between the electromagnetic solenoid and the electromagnetic solenoid.