Electric lock for sliding door

Abstract

To simplify the structure of a guide part for supporting a locking rod in a retractable manner.SOLUTION: An electric lock 20 for sliding doors includes a case 21, a locking rod 22 that protrudes and retracts via an insertion hole 21a formed in the case 21 and locks by engaging with a door body 1 when protruding, a solenoid 23 provided in the case 21, and a rotating member 24 that is rotatably provided in the case 21, rotates in accordance with an operation of the solenoid 23, and causes the locking rod 22 to protrude and retract. A guide part 25 is provided in the case 21 for guiding the locking rod 22 in the projecting / retracting direction, the guide part 25 has a guide hole 25c for guiding the locking rod 22 in the projecting / retracting direction, and a guide cylinder part 25c extending in the projecting / retracting direction is integrally formed on the guide hole 25d.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an electric lock for a sliding door, which locks a sliding door such as an automatic door. [Background technology]

[0002] Electric locks for sliding doors that lock sliding doors such as automatic doors are known. For example, Patent Documents 1 and 2 disclose an electric lock for sliding doors that includes a locking rod that extends and retracts through an insertion hole formed in a case and locks the sliding door by engaging with it when it extends, a solenoid provided in the case, and a rotating member that rotates in response to the operation of the solenoid to extend and retract the locking rod (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-219820 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the electric locks for sliding doors shown in Patent Documents 1 and 2, the structure of the guide portion that guides the locking rod in the direction of projection and recession is complex, and there is room for improvement. [Means for solving the problem]

[0005] The present invention was created in consideration of the above-mentioned circumstances and with the aim of solving these problems. The invention of claim 1 is an electric lock for sliding doors comprising a case, a locking rod that extends and retracts through an insertion hole formed in the case and locks by engaging with the sliding door when extended, a solenoid provided within the case, and a rotating member that is rotatably provided within the case and rotates in accordance with the operation of the solenoid to extend and retract the locking rod, wherein the electric lock for sliding doors comprises a guide portion provided within the case that guides the locking rod in the extending and retracting direction, the guide portion having a guide hole that guides the locking rod in the extending and retracting direction, and a guide tube portion extending in the extending and retracting direction is integrally formed in the guide hole. The invention of claim 2 is the electric lock for sliding doors according to claim 1, characterized in that the guide tube portion is formed by burring processing. The invention of claim 3 is the electric lock for sliding doors according to claim 2, characterized in that the guide tube portion extends toward the insertion hole. The invention of claim 4 is an electric lock for sliding doors described in any one of claims 1 to 3, characterized in that the tip of the guide tube portion is close to or abuts the inner surface of the case, and the inner diameter of the guide tube portion is the same as or smaller than the inner diameter of the insertion hole. The invention of claim 5 is an electric lock for sliding doors described in any one of claims 1 to 3, characterized in that it is provided with a detection switch provided within the case that detects the extended and retracted state of the locking rod, and the rotating member is integrally provided with a switch abutment portion that switches the detection switch depending on the extended and retracted state of the locking rod. The invention of claim 6 is an electric lock for sliding doors described in any one of claims 1 to 3, characterized in that it comprises an elastic material provided within the case that urges the locking rod in the retracting direction, and a cushioning material provided within the case that receives the retracted locking rod. The invention of claim 7 is the electric lock for sliding doors according to claim 6, characterized in that the guide portion is configured on a receiving surface of the elastic material. The invention of claim 8 is an electric lock for sliding doors described in any one of claims 1 to 3, characterized in that the rotating member is connected to the locking rod and the plunger of the solenoid via a connecting material, and the hole portion of the rotating member into which the connecting material fits loosely is a round hole that allows rotational movement of the rotating member and linear movement of the locking rod and the plunger. [Effects of the Invention]

[0006] According to the invention of claim 1, the guide portion has not only a guide hole that guides the locking rod in the extending / retracting direction, but also a guide tube portion that extends in the extending / retracting direction, which enables stable linear movement of the locking rod. In addition, since the guide tube portion is formed integrally with the guide portion, the structure of the guide portion can be simplified. According to the invention of claim 2, the guide tube portion is formed by burring, so that the guide portion integrated with the guide tube portion can be manufactured inexpensively. According to the invention of claim 3, the guide tube portion extends toward the insertion hole, so that when the locking rod is inserted from the inside of the case into the guide tube portion and the insertion hole, the guide tube portion formed by burring processing can function as an insertion guide for the locking rod. According to the invention of claim 4, the tip of the guide tube portion is close to or abuts the inner surface of the case, and the inner diameter of the guide tube portion is the same as or smaller than the inner diameter of the insertion hole, thereby reducing the possibility of the tip of the locking rod getting caught in the insertion hole. According to the invention of claim 5, a detection switch is provided inside the case to detect the extended / retracted state of the locking rod, and the rotating member is integrally provided with a switch abutment portion that switches the detection switch depending on the extended / retracted state of the locking rod, thereby eliminating the need for a dedicated member for switching the detection switch, thereby reducing the number of parts and simplifying the structure. According to the invention of claim 6, the case is provided with an elastic material that urges the locking rod in the retracting direction, and a cushioning material that is provided within the case to receive the retracted locking rod. This not only ensures that the locking rod is retracted, but also cushions the impact when it is retracted, thereby preventing damage to parts and noise generation. According to the invention of claim 7, the guide portion is configured on the receiving surface of the elastic material, so that a dedicated member for receiving the elastic material is not required, thereby reducing the number of parts and simplifying the structure. According to the invention of claim 8, the rotating member is connected to the locking rod and the plunger of the solenoid via a connecting member, and the hole portion of the rotating member into which the connecting member is loosely fitted is a round hole that allows rotational movement of the rotating member and linear movement of the locking rod and the plunger, thereby eliminating the need to process a long hole and simplifying the processing of the rotating member. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a front view of a main part of a sliding door in a closed state to which an electric lock according to an embodiment of the present invention is applied. [Figure 2] FIG. 2 is an enlarged view of part A in FIG. [Figure 3] FIG. 3 is a view taken along the arrow B in FIG. 2. [Figure 4] 1A and 1B are diagrams showing the unlocked state of an electric lock, where FIG. 1A is a plan view of the interior of the electric lock, FIG. 1B is a front view of the interior of the electric lock, and FIG. 1C is a side view of the interior of the electric lock. [Figure 5] 1A and 1B are diagrams showing the locked state of an electric lock, in which (a) is a plan view of the interior of the electric lock, (b) is a front view of the interior of the electric lock, and (c) is a side view of the interior of the electric lock. [Figure 6] 10A and 10B are diagrams illustrating the movements of a rotating member and a connecting pin. [Figure 7] FIG. 4(c) is an enlarged view of part C in FIG. [Figure 8] 10A and 10B are diagrams showing a first modified example of a guide portion, in which (a) is a plan view of the main part of the guide portion, (b) is a front view of the main part of the guide portion, and (c) is a perspective view of the guide material. [Figure 9] 10A and 10B are diagrams showing a second modified example of the guide portion, in which (a) is a perspective view of the guide portion and (b) is a side view of the guide portion. [Figure 10] FIG. 10 is a side view showing a third modified example of the guide portion. DETAILED DESCRIPTION OF THE INVENTION

[0008] [sliding door] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In Figures 1 to 3, reference numeral 1 denotes a door body constituting a sliding door such as an automatic door. The door body 1 is provided with a plurality of brackets 2 protruding upward from the upper end, and a rotatable door roller 3 is attached to each bracket 2.

[0009] On the other hand, a rail 4 is fixed to the building side, extending in the opening and closing direction of the door body 1. The rail 4 suspends the door body 1 via a door roller 3 and a bracket 2. Furthermore, the door roller 3 rolls on the rail 4, allowing the door body 1 to open and close between the entrance / exit section (opening) E and the door pocket section S.

[0010] Furthermore, an electric opening / closing mechanism 5 for opening and closing the door body 1 is attached to the building side. The electric opening / closing mechanism 5 includes a drive pulley 6 rotatably arranged above one end of the rail 4, an electric motor 7 for rotating the drive pulley 6 forward and backward, a driven pulley 8 rotatably arranged above the other end of the rail 4, an endless belt 9 wound between the drive pulley 6 and the driven pulley 8, and a connector 10 for connecting one of the brackets 2 to the belt 9.

[0011] According to such an electric opening and closing mechanism 5, the belt 9 moves back and forth in response to the forward and reverse rotation of the drive pulley 6, moving the door body 1 in the opening and closing direction. Therefore, the door body 1 can be electrically opened and closed based on the drive control of the electric motor 7 that rotates the drive pulley 6 forward and reverse.

[0012] [Electric lock] As shown in Figures 1 to 3, an electric lock 20 for locking the door body 1 is attached to the building side. The electric lock 20 has a locking rod 22 that protrudes from the underside of a case 21. As shown in Figure 1, when the locking rod 22 of the electric lock 20 is protruded while the door body 1 is in the fully closed position, the locking rod 22 engages with the bracket 2 of the door body 1, entering a locked state that restricts the opening operation of the door body 1. When the locking rod 22 of the electric lock 20 is retracted, the locking rod 22 retracts from the bracket 2 of the door body 1, entering an unlocked state that allows the door body 1 to be opened.

[0013] As shown in FIGS. 4 to 7, the electric lock 20 includes a case 21, a locking rod 22, a solenoid 23, a rotating member 24, a guide portion 25, an elastic material 26, a buffer material 27, and a detection switch 28.

[0014] [case] The case 21 is a box that houses the locking rod 22, the solenoid 23, the rotating member 24, the guide portion 25, the elastic material 26, the buffer material 27, and the detection switch 28. An insertion hole 21a is formed in the bottom plate portion of the case 21, through which the locking rod 22 is inserted so as to be able to freely protrude and retract.

[0015] [Lock rod] The locking rod 22 is supported in the case 21 so as to be capable of linear movement in the up and down direction, and its lower end side is configured to appear and disappear through an insertion hole 21a of the case 21 in response to the linear movement.

[0016] [Solenoid] Solenoid 23 is fixed inside case 21 via mounting member 23a. Solenoid 23 has plunger 23b that moves in and out in the horizontal direction (for example, left and right). When solenoid 23 is OFF, plunger 23b is in a retracted state due to the biasing force of elastic material 26 (or an elastic material installed inside), and when solenoid 23 is ON, plunger 23b is in a protruding state due to magnetic retraction.

[0017] [Rotating member] The rotating member 24 is rotatably provided within the case 21 via a support shaft 24a facing in a horizontal direction (for example, the front-to-rear direction). The rotating member 24 includes a connecting hole 24b (hole) connected to the tip end of the plunger 23b via a connecting pin 23c (connecting member), and a connecting hole 24c (hole) connected to the upper end of the locking rod 22 via a connecting pin 22a (connecting member).

[0018] That is, the rotating member 24 rotates in response to the advancement and retraction (horizontal linear movement) of the plunger 23b, causing the locking rod 22 to advance and retract (vertical linear movement). Therefore, the connecting holes 24b, 24c of the rotating member 24 are required to be accommodation holes that fit the connecting pins 23c, 22a with a clearance and mutually permit the rotational movement of the rotating member 24 and the linear movement of the locking rod 22 and the plunger 23b, as shown in Fig. 6. Typically, such accommodation holes are formed as arc-shaped elongated holes because the rotating member 24 rotates (swings) about the support shaft 24a as the rotation axis, while the connecting pins 23c, 22a must only move back and forth in the direction of the support shaft 24a but are immobile around the support shaft 24a. However, in this embodiment, the connecting holes are formed as large-diameter round holes that include an elongated hole region. This configuration makes it easier to form the connecting holes 24b, 24c.

[0019] [Guide section] Guide portion 25 is provided inside case 21 and guides locking rod 22 in the extending / retracting direction. For example, guide portion 25 in this embodiment is configured using a metal L-shaped plate having fixed piece 25a fixed to the inner surface of case 21 and guide piece 25b along the bottom surface of case 21, and guide hole 25c that guides locking rod 22 in the extending / retracting direction is formed in the center of guide piece 25b.

[0020] As shown in FIG. 7, a guide tube portion 25d extending in the direction in which the locking rod 22 is inserted is integrally formed at the location where the guide hole 25c is formed. Such a guide tube portion 25d can be formed, for example, by burring. The guide tube portion 25d formed by burring preferably extends toward the insertion hole 21a. In this way, when the locking rod 22 is inserted from inside the case 21 through the guide tube portion 25d and the insertion hole 21a, the guide tube portion 25d formed by burring has an R portion 25e with an inverted conical cylindrical shape on the insertion side of the locking rod 22, which allows the locking rod 22 insertion side of the guide tube portion 25d to function as an insertion guide with a larger diameter.

[0021] The tip of the guide tube portion 25d is close to or abuts against the inner surface of the case 21. The inner diameter R2 of the guide tube portion 25d is the same as or smaller than the inner diameter R1 of the insertion hole 21a. This reduces the possibility that the tip of the locking rod 22 that is retracted or retracted too far will get caught in the insertion hole 21a.

[0022] [Elastic material] The elastic member 26 biases the locking rod 22 in the retracting direction. In this embodiment, the elastic member 26 is a compression coil spring, and is installed between the snap ring 22b attached to the middle portion of the locking rod 22 and the guide piece 25b of the guide portion 25. In this manner, the guide portion 25 can also be used as a receiving member (receiving surface) for the elastic member 26. In addition, the compression coil spring constituting the elastic member 26 has a truncated cone shape whose diameter decreases toward the upper side, and acts to suppress tilting of the axis. This suppresses misalignment of the locking rod 22, allowing the locking rod 22 to smoothly extend and retract.

[0023] [Cushioning material] The buffer material 27 is provided on the ceiling of the case 21 and receives the upper end of the retracted locking rod 22. This reduces the impact when the locking rod 22 is retracted, thereby preventing damage to parts and noise.

[0024] [Detection switch] The detection switch 28 detects the extended / retracted state of the locking rod 22. The rotating member 24 of this embodiment is integrally provided with a switch abutment portion 24d that abuts against a detection lever 28a of the detection switch 28 in accordance with the extended / retracted state of the locking rod 22, switching the detection switch 28. In this way, the extended / retracted state of the locking rod 22 can be detected by utilizing the movement of the rotating member 24.

[0025] [Effects of the embodiment] According to the present embodiment configured as described above, electric lock 20 for sliding doors includes case 21, locking rod 22 that extends and retracts through insertion hole 21a formed in case 21 and engages with door body 1 when extended to lock, solenoid 23 provided within case 21, and pivoting member 24 that is rotatably provided within case 21 and rotates in response to operation of solenoid 23 to extend and retract locking rod 22. Also, guide portion 25 is provided within case 21 to guide locking rod 22 in the extending and retracting direction, and guide portion 25 has guide hole 25c that guides locking rod 22 in the extending and retracting direction. Guide hole 25c has guide tube portion 25d formed integrally with guide portion 25, extending in the extending and retracting direction, enabling stable linear movement of locking rod 22. Furthermore, guide tube portion 25d is formed integrally with guide portion 25, thereby simplifying the structure of guide portion 25.

[0026] Furthermore, since the guide tube portion 25d is formed by burring, the guide portion 25 integrated with the guide tube portion 25d can be manufactured inexpensively.

[0027] Furthermore, since the guide tube portion 25d extends toward the insertion hole 21a, when the locking rod 22 is inserted from the inside of the case 21 into the guide tube portion 25d and the insertion hole 21a, the R portion 25e formed by burring processing can function as an insertion guide for the locking rod 22.

[0028] Furthermore, the tip of the guide tube portion 25d is close to or abuts the inner surface of the case 21, and the inner diameter R2 of the guide tube portion 25d is the same as or smaller than the inner diameter R1 of the insertion hole 21a, thereby reducing the possibility that the tip of the locking rod 22 will get caught in the insertion hole 21a.

[0029] In addition, the electric lock 20 is provided with a detection switch 28 that is provided within the case 21 and detects the protruding and retracting state of the locking rod 22, and the rotating member 24 is integrally provided with a switch abutment portion 24d that switches the detection switch 28 depending on the protruding and retracting state of the locking rod 22, thereby eliminating the need for a dedicated part for switching the detection switch 28, thereby reducing the number of parts and simplifying the structure.

[0030] In addition, the electric lock 20 is provided with an elastic material 26 that is provided inside the case 21 and urges the locking rod 22 in the retracting direction, and a cushioning material 27 that is provided inside the case 21 and receives the retracted locking rod 22, so that not only does the locking rod 22 reliably retract, but also the impact at the time of retraction is mitigated, thereby suppressing damage to parts and the generation of noise.

[0031] Furthermore, since the guide portion 25 is formed on the receiving surface of the elastic material 26, a dedicated member for receiving the elastic material 26 is not required, which reduces the number of parts and simplifies the structure.

[0032] Furthermore, the rotating member 24 is connected to the locking rod 22 and the plunger 23b of the solenoid 23 via connecting pins 22a and 23c, and the connecting holes 24b and 24c of the rotating member 24, into which the connecting pins 22a and 23c fit loosely, are round holes that allow the rotational movement of the rotating member 24 and the linear movement of the locking rod 22 and the plunger 23b, thereby eliminating the need to process elongated holes and simplifying the processing of the rotating member 24.

[0033] [Variations] The present invention is not limited to the above-described embodiment. For example, as in a guide portion 25B of a first modified example shown in Fig. 8, the locking rod 22 may be guided to protrude and retract by a guide hole 25g formed in the guide piece 25f and a pair of guide members 25h welded to the guide piece 25f and extending in the direction in which the locking rod 22 protrudes and retracts.

[0034] Also, like a guide portion 25C of a second modified example shown in FIG. 9, the locking rod 22 may be guided so as to be retractable by a plurality of guide pieces 25i each having a guide hole 25j formed therein.

[0035] Furthermore, like a guide portion 25D of a third modified example shown in FIG. 10, the locking rod 22 may be guided so as to be retractable by a U-shaped guide member integrally having a plurality of guide pieces 25k. [Explanation of symbols]

[0036] 1 Door body (sliding door) 2 brackets 3 Door Roller 4 Rail 5 Electric opening / closing mechanism 6 Drive pulley 7 Electric motor 8 driven pulley 9 Belt 10 Connector 20 Electric Lock 21 cases 21a Insertion hole 22 Locking rod 22a Connecting pin (connecting material) 22b snap ring 23 Solenoid 23a Mounting member 23b Plunger 23c Connecting pin (connecting material) 24 Rotating member 24a spindle 24b Connection hole (hole) 24c Connection hole (hole) 24d Switch contact part 25 Guide section 25a Fixed piece 25b Guide piece 25c guide hole 25d Guide tube 25e R section 26 Elastic material 27 Cushioning material 28 Detector switch 28a Detection lever R1 Inner diameter of insertion hole R2 Inner diameter of guide tube

Claims

1. Case and a locking rod that extends and retracts through an insertion hole formed in the case and engages with the sliding door when protruding to lock it; a solenoid provided in the case; a rotating member that is rotatably provided in the case and rotates in response to the operation of the solenoid to cause the locking rod to appear and disappear, a guide portion provided in the case for guiding the locking rod in the extending and retracting direction; The guide portion has a guide hole that guides the locking rod in the protruding and retracting direction, An electric lock for sliding doors, characterized in that a guide tube portion extending in the protruding and retracting direction is integrally formed in the guide hole.

2. 2. The electric lock for a sliding door according to claim 1, wherein the guide tube portion is formed by burring.

3. The electric lock for a sliding door according to claim 2, wherein the guide tube portion extends toward the insertion hole.

4. a tip end of the guide tube portion is in close proximity to or in contact with the inner surface of the case; 4. The electric lock for a sliding door according to claim 1, wherein the inner diameter of the guide tube portion is the same as or smaller than the inner diameter of the insertion hole.

5. a detection switch provided in the case for detecting the protruding and retracting state of the locking rod; 4. The electric lock for a sliding door according to claim 1, wherein the rotating member is integrally provided with a switch abutment portion that switches the detection switch depending on the protruding or retracting state of the locking rod.

6. an elastic member provided in the case and biasing the locking rod in a retracting direction; 4. The electric lock for a sliding door according to claim 1, further comprising a buffer material provided within the case for receiving the recessed locking rod.

7. 7. The electric lock for a sliding door according to claim 6, wherein the guide portion is formed on a receiving surface of the elastic material.

8. the rotating member is connected to the locking rod and the plunger of the solenoid via a connecting member; An electric lock for sliding doors as described in any one of claims 1 to 3, characterized in that the hole portion of the rotating member into which the connecting material is loosely fitted is a circular hole that allows rotational movement of the rotating member and linear movement of the locking rod and the plunger.

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